Upgrade to elfutils 0.161.

Change-Id: Iee07e1329d9750f092afc6c2fbd6af8db32862b0

72 files changed, 8285 insertions, 3494 deletions

diff --git a/src/libdwfl/Android.mk b/src/libdwfl/Android.mk
index dc6a14ad..2198fce2 100755
--- a/src/libdwfl/Android.mk
+++ b/src/libdwfl/Android.mk
@@ -15,30 +15,71 @@
 LOCAL_PATH := $(call my-dir)
 
 LIBDWFL_SRC_FILES := \
-	dwfl_addrdwarf.c \
-	dwfl_addrmodule.c \
-	dwfl_begin.c \
-	dwfl_build_id_find_elf.c \
-	dwfl_build_id_find_debuginfo.c \
-	dwfl_end.c \
-	dwfl_error.c \
-	dwfl_module.c \
-	dwfl_module_addrdie.c \
-	dwfl_module_addrsym.c \
-	dwfl_module_build_id.c \
-	dwfl_report_elf.c \
-	dwfl_module_getdwarf.c \
-	dwfl_module_getsym.c \
-	dwfl_module_report_build_id.c \
-	find-debuginfo.c \
-	image-header.c \
-	libdwfl_crc32.c \
-	libdwfl_crc32_file.c \
-	linux-kernel-modules.c \
-	offline.c \
-	open.c \
-	relocate.c \
-	segment.c \
+    core-file.c \
+    cu.c \
+    derelocate.c \
+    dwfl_addrdie.c \
+    dwfl_addrdwarf.c \
+    dwfl_addrmodule.c \
+    dwfl_begin.c \
+    dwfl_build_id_find_debuginfo.c \
+    dwfl_build_id_find_elf.c \
+    dwfl_cumodule.c \
+    dwfl_dwarf_line.c \
+    dwfl_end.c \
+    dwfl_error.c \
+    dwfl_frame.c \
+    dwfl_frame_pc.c \
+    dwfl_frame_regs.c \
+    dwfl_getdwarf.c \
+    dwfl_getmodules.c \
+    dwfl_getsrc.c \
+    dwfl_getsrclines.c \
+    dwfl_line_comp_dir.c \
+    dwfl_linecu.c \
+    dwfl_lineinfo.c \
+    dwfl_linemodule.c \
+    dwfl_module_addrdie.c \
+    dwfl_module_addrname.c \
+    dwfl_module_addrsym.c \
+    dwfl_module_build_id.c \
+    dwfl_module.c \
+    dwfl_module_dwarf_cfi.c \
+    dwfl_module_eh_cfi.c \
+    dwfl_module_getdwarf.c \
+    dwfl_module_getelf.c \
+    dwfl_module_getsrc.c \
+    dwfl_module_getsrc_file.c \
+    dwfl_module_getsym.c \
+    dwfl_module_info.c \
+    dwfl_module_nextcu.c \
+    dwfl_module_register_names.c \
+    dwfl_module_report_build_id.c \
+    dwfl_module_return_value_location.c \
+    dwfl_nextcu.c \
+    dwfl_onesrcline.c \
+    dwfl_report_elf.c \
+    dwfl_segment_report_module.c \
+    dwfl_validate_address.c \
+    dwfl_version.c \
+    elf-from-memory.c \
+    find-debuginfo.c \
+    frame_unwind.c \
+    gzip.c \
+    image-header.c \
+    libdwfl_crc32.c \
+    libdwfl_crc32_file.c \
+    lines.c \
+    link_map.c \
+    linux-core-attach.c \
+    linux-kernel-modules.c \
+    linux-pid-attach.c \
+    linux-proc-maps.c \
+    offline.c \
+    open.c \
+    relocate.c \
+    segment.c \
+
 
 ifeq ($(HOST_OS),linux)
 
@@ -56,6 +97,7 @@ LOCAL_SRC_FILES := $(LIBDWFL_SRC_FILES)
 LOCAL_C_INCLUDES := \
 	$(LOCAL_PATH)/.. \
 	$(LOCAL_PATH)/../lib \
+	$(LOCAL_PATH)/../libdwelf \
 	$(LOCAL_PATH)/../libdwfl \
 	$(LOCAL_PATH)/../libebl \
 	$(LOCAL_PATH)/../libdw \
@@ -74,6 +116,8 @@ LOCAL_MODULE:= libdwfl
 
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
 
+LOCAL_STATIC_LIBRARIES := libz
+
 include $(BUILD_HOST_STATIC_LIBRARY)
 
 endif # linux
@@ -92,16 +136,17 @@ LOCAL_SRC_FILES := $(LIBDWFL_SRC_FILES)
 LOCAL_C_INCLUDES := \
 	$(LOCAL_PATH)/.. \
 	$(LOCAL_PATH)/../lib \
+	$(LOCAL_PATH)/../libdwelf \
 	$(LOCAL_PATH)/../libdwfl \
 	$(LOCAL_PATH)/../libebl \
 	$(LOCAL_PATH)/../libdw \
 	$(LOCAL_PATH)/../libelf
 
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/../bionic-fixup
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/../../bionic-fixup
 
-LOCAL_CFLAGS += -include $(LOCAL_PATH)/../bionic-fixup/AndroidFixup.h
+LOCAL_CFLAGS += -include $(LOCAL_PATH)/../../bionic-fixup/AndroidFixup.h
 
-LOCAL_CFLAGS += -DHAVE_CONFIG_H -std=gnu99 -Werror
+LOCAL_CFLAGS += -DHAVE_CONFIG_H -std=gnu99 -D_GNU_SOURCE -Werror
 
 # to suppress the "pointer of type ‘void *’ used in arithmetic" warning
 LOCAL_CFLAGS += -Wno-pointer-arith
@@ -113,4 +158,6 @@ LOCAL_MODULE:= libdwfl
 
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
 
+LOCAL_STATIC_LIBRARIES := libz
+
 include $(BUILD_STATIC_LIBRARY)
diff --git a/src/libdwfl/ChangeLog b/src/libdwfl/ChangeLog
index 87a05550..69e59a6f 100644
--- a/src/libdwfl/ChangeLog
+++ b/src/libdwfl/ChangeLog
@@ -1,3 +1,930 @@
+2014-12-19  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_symtab): Always try find_dynsym last.
+
+2014-12-19  Mark Wielaard  <mjw@redhat.com>
+
+	* elf-from-memory.c (handle_segment): Remove palign sanity check.
+
+2014-12-18  Mark Wielaard  <mjw@redhat.com>
+
+	* relocate.c (resolve_symbol): Make sure symstrdata->d_buf != NULL.
+
+2014-12-13  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_dynsym): elf_getdata_rawchunk takes
+	a size_t, make sure it doesn't overflow.
+
+2014-12-13  Mark Wielaard  <mjw@redhat.com>
+
+	* cu.c (cudie_offset): Make sure Dwarf_Off difference doesn't
+	wrap around before returning as int.
+
+2014-12-11  Josh Stone  <jistone@redhat.com>
+
+	* dwfl_module_getsrc.c (dwfl_module_getsrc): Return the *last* line
+	record <= addr, rather than returning immediately on matches.
+
+2014-12-09  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_segment_report_module.c (handle_file_note): Check count doesn't
+	overflow.
+
+2014-12-07  Mark Wielaard  <mjw@redhat.com>
+
+	* relocate.c (relocate_section): Sanity check section overlap against
+	actually used ehsize, shentsize and phentsize.
+
+2014-12-07  Mark Wielaard  <mjw@redhat.com>
+
+	* offline.c (dwfl_offline_section_address): Assert shndx is not zero.
+	* relocate.c (__libdwfl_relocate_value): Don't relocate against
+	section zero.
+
+2014-11-29  Mark Wielaard  <mjw@redhat.com>
+
+	* relocate.c (relocate_section): Check relocation section and target
+	section data don't overlap any of the ELF headers.
+	(relocate): Check for offset + size overflow.
+
+2014-11-22  Mark Wielaard  <mjw@redhat.com>
+
+	* link_map.c (consider_executable): Use elf_getphdrnum.
+	(dwfl_link_map_report): Likewise.
+
+2014-11-18  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_symtab): Sanity check the data buffer,
+	number of symbols and first_global before use.
+
+2014-11-14  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf.c (load_symtab): Don't use tables which have
+	a zero sh_entsize.
+
+2014-11-10  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_dynsym): New inner function
+	translate_offs that takes an adjust argument. Try finding
+	the symbol table with and without adjusting to main_bias.
+
+2014-09-26  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Support NT_FILE for locating files.
+	* core-file.c (dwfl_core_file_report): New variables note_file and
+	note_file_size, set them and pass them to dwfl_segment_report_module.
+	* dwfl_segment_report_module.c: Include common.h and fcntl.h.
+	(buf_has_data, buf_read_ulong, handle_file_note): New functions.
+	(invalid_elf): New function from code of dwfl_segment_report_module.
+	(dwfl_segment_report_module): Add parameters note_file and
+	note_file_size.  New variables elf and fd, clean them up in finish.
+	Move some code to invalid_elf.  Call handle_file_note, if it found
+	a name verify the file by invalid_elf.  Protect elf and fd against
+	cleanup by finish if we found the file for new Dwfl_Module.
+	* libdwflP.h (dwfl_segment_report_module): Add parameters note_file and
+	note_file_size.
+
+2014-09-23  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_segment_report_module.c (dwfl_segment_report_module):
+	Extract ei_class, ei_data and e_type early and use the result.
+
+2014-09-18  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_build_id_find_elf.c (dwfl_build_id_find_elf): Use IS_EXECUTABLE.
+	* dwfl_segment_report_module.c (dwfl_segment_report_module): Set
+	IS_EXECUTABLE.
+	* libdwflP.h (struct Dwfl_Module): New field is_executable.
+
+2014-08-28  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_offsets): Add parameter main_bias, use
+	it.
+	(find_dynsym): Pass the new parameter main_bias.
+
+2014-08-14  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-kernel-modules.c (check-suffix): Also TRY .ko.xz.
+
+2014-07-24  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix report_r_debug for prelinked libraries.
+	* link_map.c (report_r_debug): Comment out variable l_addr.
+	Use instead new variable base recalculated from l_ld.
+
+2014-06-24  Kurt Roeckx  <kurt@roeckx.be>
+
+	* linux-pid-attach.c: Make it build on non linux hosts.
+
+2014-06-17  Mark Wielaard  <mjw@redhat.com>
+
+	* frame_unwind.c (handle_cfi): Use ebl_func_addr_mask.
+	* dwfl_module_getsym.c (__libdwfl_getsym): Likewise.
+
+2014-06-15  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-core-attach.c (core_memory_read): Use libdw/memory-access.h
+	macros read_4ubyte_unaligned_noncvt and read_8ubyte_unaligned_noncvt
+	to read possibly unaligned data.
+	(core_next_thread): Likewise.
+	(core_set_initial_registers): Likewise.
+	(dwfl_core_file_attach): Likewise.
+
+2014-06-11  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_frame.c (__libdwfl_process_free): Reset dwfl->attacherr.
+	(dwfl_attach_state): Set dwfl->attacherr.
+	(dwfl_pid): Check and return dwfl->attacherr if set.
+	(dwfl_getthreads): Likewise.
+	(getthread): Likewise.
+	* libdwflP.h: Add DWFL_E_NO_CORE_FILE.
+	(struct Dwfl): Add attacherr field.
+	* linux-core-attach.c (dwfl_core_file_attach): Set dwfl->attacherr.
+	Don't assert if ELF file is not ET_CORE, just return error.
+	* linux-pid-attach.c (dwfl_linux_proc_attach): Set dwfl->attacherr.
+
+2014-06-10  Mark Wielaard  <mjw@redhat.com>
+
+	* argp-std.c (parse_opt): Ignore errors from dwfl_core_file_attach
+	or dwfl_linux_proc_attach.
+
+2014-05-15  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-proc-maps.c (grovel_auxv): Close fd on error.
+
+2014-05-02  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf: Remove ENABLE_DWZ ifdefs so find_debug_altlink
+	is always called.
+
+2014-05-01  Mark Wielaard  <mjw@redhat.com>
+
+	* libdwflP.h (struct Dwfl_Module): Add alt, alt_fd and alt_elf fields.
+	(__libdwfl_open_mod_by_build_id): Renamed __libdwfl_open_by_build_id.
+	(__libdwfl_open_by_build_id): New declaration that takes an explicit
+	build-id.
+	* dwfl_build_id_find_debuginfo.c (dwfl_build_id_find_debuginfo): If
+	we already have the Dwarf then look for the alt dwz multi file by
+	build-id.
+	* dwfl_build_id_find_elf.c (__libdwfl_open_by_build_id): Add the
+	build-id we are looking for as argument.
+	(__libdwfl_open_mod_by_build_id): New function, calls
+	__libdwfl_open_by_build_id.
+	(dwfl_build_id_find_elf): Call __libdwfl_open_mod_by_build_id.
+	* dwfl_module.c (__libdwfl_module_free): Release alt, alt_elf and
+	close alt_fd if necessary.
+	* dwfl_module_getdwarf.c (__check_build_id): Removed.
+	(try_debugaltlink): Removed.
+	(open_debugaltlink): Removed.
+	(open_elf_file): First half of open_elf that just opens the elf
+	file but doesn't setup the load address.
+	(open_elf): Call open_elf_file.
+	(find_debug_altlink): New function.
+	(load_dw): Remove loading of dwz multifile.
+	(find_dw): Call find_debug_altlink.
+	* find-debuginfo.c (validate): Handle alt debug case using
+	dwelf_dwarf_gnu_debugaltlink and mod->alt_elf.
+	(find_debuginfo_in_path): Handle alt debug files possibly in .dwz
+	subdirs.
+	* linux-kernel-modules.c (try_kernel_name): Use fakemod.debug.name
+	to store name to find by dwfl_standard_find_debuginfo instead of
+	allocating an extra variable on stack.
+
+2014-04-30  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_build_id.c (__libdwfl_find_elf_build_id): Moved to
+	dwelf_elf_gnu_build_id.c.
+	(__libdwfl_find_build_id): Add assert to make sure mod is never NULL.
+	* dwfl_segment_report_module.c (dwfl_segment_report_module): Call
+	dwelf_elf_gnu_build_id directly instead of __libdwfl_find_build_id.
+	* dwfl_module_getdwarf.c (__check_build_id): Implement using
+	dwelf_elf_gnu_build_id.
+
+2014-04-15  Florian Weimer  <fweimer@redhat.com>
+
+	* dwfl_module_getdwarf.c (__check_build_id): Moved from libdw.
+	(try_debugaltlink): Likewise.
+	(open_debugaltlink): Likewise.
+	(load_dw): Locate alternate debug information using
+	dwelf_dwarf_gnu_debugaltlink and call open_debugaltlink.
+
+2014-04-11  Mark Wielaard  <mjw@redhat.com>
+
+	* Makefile.am (AM_CPPFLAGS): Add libdwelf.
+	* libdwflP.h: Include libdwelfP.h.
+	* dwfl_module_getdwarf.c (find_debuglink): Moved to libdwelf.
+	(find_debuginfo): Use dwelf_elf_gnu_debuglink.
+
+2014-04-22  Mark Wielaard  <mjw@redhat.com>
+
+	* frame_unwind.c (__libdwfl_frame_reg_get): Use uint64_t when
+	checking bits.
+	(__libdwfl_frame_reg_set): Likewise.
+
+2014-04-22  Kurt Roeckx  <kurt@roeckx.be>
+
+	* linux-pid-attach.c: Make linux only.
+
+2014-03-14  Mark Wielaard  <mjw@redhat.com>
+
+	* Makefile.am: Remove !MUDFLAP and MUDFLAP conditions.
+	Remove libelf and libdw definitions when MUDFLAP is defined.
+	* argp-std.c (__libdwfl_argp_mudflap_options): Removed.
+
+2014-03-03  Mark Wielaard  <mjw@redhat.com>
+
+	* elf-from-memory.c (elf_from_remote_memory): Keep track of
+	segments_end_mem. Pass memsz to first handle_segment pass. Only
+	extend contents_size and use shdrs if only file bits are in
+	segment.
+
+2014-03-11  Josh Stone  <jistone@redhat.com>
+
+	* dwfl_module_getdwarf.c (open_elf): Only explicitly set
+	mod->e_type when processing the main ELF file.
+
+2014-03-04  Mark Wielaard  <mjw@redhat.com>
+
+	* libdwflP.h (struct __libdwfl_pid_arg): Moved here and renamed from
+	linux-pid-attach.c (struct pid_arg).
+	(__libdwfl_get_pid_arg): New internal function declaration.
+	(__libdwfl_ptrace_attach): Likewise.
+	(__libdwfl_ptrace_detach): Likewise.
+	* dwfl_frame.c (dwfl_attach_state): Add "(deleted)" files to the
+	special exception modules that cannot be checked at this point.
+	* linux-pid-attach.c (struct pid_arg): Moved to libdwflP.h
+	(ptrace_attach): Renamed to...
+	(__libdwfl_ptrace_attach): New internal function.
+	(__libdwfl_ptrace_detach): Likewise. Extracted from ...
+	(pid_thread_detach): Call __libdwfl_ptrace_detach now.
+	(__libdwfl_get_pid_arg): New internal function.
+	* linux-proc-maps.c (dwfl_linux_proc_find_elf): Check if special
+	module name contains "(deleted)" and dwfl_pid gives an attached
+	pid. If pid is set and try to (re)use ptrace attach state of
+	process before reading memory.
+
+2014-03-03  Mark Wielaard  <mjw@redhat.com>
+
+	* elf-from-memory.c (elf_from_remote_memory): Take pagesize as
+	argument. Free buffer when detecting bad elf. Check PT_LOAD
+	alignment requirements on first handle_segment pass. Calculate
+	loadbase, start and end of segment using pagesize, not p_align.
+	* linux-proc-maps.c (dwfl_linux_proc_find_elf): Provide pagesize
+	to elf_from_remote_memory.
+
+2014-02-26  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-proc-maps.c (proc_maps_report): Don't assert on bad input.
+
+2014-02-26  Mark Wielaard  <mjw@redhat.com>
+
+	* elf-from-memory.c (elf_from_remote_memory): Check against p64
+	p_type in case ELFCLASS64, not against p32 p_type.
+
+2014-01-17  Petr Machata  <pmachata@redhat.com>
+
+	* relocate.c (relocate_section): Use gelf_fsize instead of relying
+	on shdr->sh_entsize.
+
+2014-01-05  Mark Wielaard  <mjw@redhat.com>
+
+	* frame_unwind.c (handle_cfi): Only skip resetting return register
+	if the regno is not the actual CIE return address register.
+
+2014-01-02  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-pid-attach.c (dwfl_linux_proc_attach): Use strtol, not atoi.
+
+2013-12-30  Mark Wielaard  <mjw@redhat.com>
+
+	* argp-std.c (parse_opt): Call dwfl_linux_proc_attach and
+	dwfl_core_file_attach explicitly.
+	* core-file.c (dwfl_core_file_report): Don't call
+	__libdwfl_attach_state_for_core implicitly.
+	* dwfl_begin.c (dwfl_begin): Remove setting of process_attach_error.
+	* dwfl_frame.c (dwfl_pid): Set errno to DWFL_E_NO_ATTACH_STATE, not
+	process_attach_error.
+	(dwfl_getthreads): Likewise.
+	(getthread): Likewise.
+	* libdwfl.h (dwfl_core_file_report): Update documentation.
+	(dwfl_linux_proc_report): Likewise.
+	(dwfl_core_file_attach): New function declaration.
+	(dwfl_linux_proc_attach): Likewise.
+	* libdwflP.h (struct Dwfl): Remove process_attach_error.
+	(__libdwfl_attach_state_for_pid): Removed declaration.
+	(__libdwfl_attach_state_for_core): Likewise.
+	(dwfl_core_file_attach): New internal declaration.
+	(dwfl_linux_proc_attach): Likewise.
+	(attach_state_for_core): Renamed to...
+	(dwfl_core_file_attach): ...this. Change return type.
+	(__libdwfl_attach_state_for_core): Removed.
+	* linux-pid-attach.c (struct pid_arg): Add assume_ptrace_stopped.
+	(pid_set_initial_registers): Check assume_ptrace_stopped before
+	calling ptrace.
+	(pid_thread_detach): Likewise.
+	(__libdwfl_attach_state_for_pid): Renamed to...
+	(dwfl_linux_proc_attach): ...this. Adjust return type.
+	* linux-proc-maps.c (dwfl_linux_proc_report): Don't call
+	__libdwfl_attach_state_for_pid implicitly.
+
+2013-12-28  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-proc-maps.c (dwfl_linux_proc_find_elf): Don't return special
+	character device files, only regular files.
+
+2013-12-24  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-core-attach.c (core_next_thread): Check whether thread_argp
+	is NULL. Reset core_arg->thread_note_offset and malloc a thread_arg
+	in that case. Free thread_arg if there are no more threads.
+
+2013-12-23  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_segment_report_module.c (dwfl_segment_report_module): Free
+	build_id before returning early.
+
+2013-12-23  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-pid-attach.c (__libdwfl_attach_state_for_pid): Report actual
+	pid (thread group leader) to dwfl_attach_state.
+
+2013-12-21  Mark Wielaard  <mjw@redhat.com>
+
+	* frame_unwind.c (handle_cfi): Track whether the return register
+	has been set and only allow it to be set once.
+
+2013-12-20  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_frame.c (one_arg): New struct.
+	(get_one_thread_cb): New function.
+	(dwfl_getthread): Likewise.
+	(one_thread): New struct.
+	(get_one_thread_frames_cb): New function.
+	(dwfl_getthread_frames): Likewise.
+	* libdwfl.h (Dwfl_Thread_Callbacks): Add get_thread function.
+	(dwfl_getthread_frames): Likewise.
+	* libdwflP.h (dwfl_getthread_frames): New internal function declaration.
+	* linux-core-attach.c (core_thread_callbacks): Initialize get_thread
+	to NULL.
+	* linux-pid-attach.c (pid_getthread): New function.
+	(pid_thread_callbacks): Initialize get_thread to pid_getthread.
+
+2013-12-20  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-kernel-modules.c (report_kernel_archive): Correct nested
+	asprintf result check for debug.a.
+
+2013-12-18  Mark Wielaard  <mjw@redhat.com>
+
+	* derelocate.c (__libdwfl_find_section_ndx): New internal function.
+	* dwfl_module_addrname.c (dwfl_module_addrname): Use
+	dwfl_module_addrinfo.
+	* dwfl_module_addrsym.c (dwfl_module_addrsym_elf): Replace with...
+	(__libdwfl_addrsym): ...this. Use __libdwfl_getsym, use value
+	for comparisons, not st_value. Fill in off. Search for both value
+	and the (adjusted) sym.st_value when different.
+	(dwfl_module_addrsym): Implement using __libdwfl_addrsym.
+	(dwfl_module_addrinfo): New function.
+	* dwfl_module_getsym.c (dwfl_module_getsym_elf): Replace with...
+	(__libdwfl_getsym): ...this. Use ebl_resolve_sym_value if requested
+	and possible. Adjust sym->st_value only when requested. Fill in addr
+	if available.
+	(dwfl_module_getsym_info): New function.
+	(dwfl_module_getsym): Use __libdwfl_getsym.
+	* libdwfl.h (dwfl_module_getsym_elf): Removed.
+	(dwfl_module_getsym_info): New function declaration.
+	(dwfl_module_addrinfo): Likewise.
+	(dwfl_module_addrsym): Add documentation describing differences
+	with addrinfo variants.
+	(dwfl_module_addrsym_elf): Removed.
+	* libdwflP.h (__libdwfl_getsym): New internal function declaration.
+	(__libdwfl_addrsym): Likewise.
+	(__libdwfl_find_section_ndx): Likewise.
+	(dwfl_module_addrinfo): New internal declaration.
+	(dwfl_module_getsym_info): Likewise.
+	(dwfl_module_addrsym_elf): Removed.
+	(dwfl_module_getsym_elf): Likewise.
+
+2013-12-18  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* argp-std.c (offline_find_elf): Remove.
+	(offline_callbacks): Use dwfl_build_id_find_elf instead.
+	* dwfl_build_id_find_elf.c (dwfl_build_id_find_elf): Move here the code
+	removed above.
+
+2013-12-18  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	unwinder: s390 and s390x
+	* dwfl_frame_pc.c (dwfl_frame_pc): Call ebl_normalize_pc.
+	* frame_unwind.c (new_unwound): New function from ...
+	(handle_cfi): ... here.  Call it.
+	(setfunc, getfunc, readfunc): New functions.
+	(__libdwfl_frame_unwind): Call ebl_unwind with those functions.
+	* linux-core-attach.c (core_set_initial_registers): Always iterate
+	through the Ebl_Register_Location loop.  Call
+	dwfl_thread_state_register_pc there.
+
+2013-12-17  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* frame_unwind.c (handle_cfi): Call ebl_dwarf_to_regno for RA.
+
+2013-12-17  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-pid-attach.c (pid_next_thread): Call rewinddir on first
+	traversal.
+
+2013-12-16  Mark Wielaard  <mjw@redhat.com>
+
+	* libdwfl.h (dwfl_module_getsymtab_first_global): New function
+	definition.
+	* dwfl_module_getdwarf.c (dwfl_module_getsymtab_first_global): New
+	function.
+	* libdwflP.h (dwfl_module_getsymtab_first_global): New internal
+	function definition.
+	* dwfl_module_addrsym.c (dwfl_module_addrsym_elf): Use new function.
+
+2013-12-14  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module.c (__libdwfl_module_free): Free mod->reloc_info if
+	allocated. Call dwarf_cfi_end on mod->eh_cfi if necessary.
+	* frame_unwind.c (handle_cfi): Free frame result from
+	dwarf_cfi_addrframe when done.
+
+2013-12-15  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	unwinder: ppc and ppc64
+	* frame_unwind.c (__libdwfl_frame_reg_get, __libdwfl_frame_reg_set):
+	Call ebl_dwarf_to_regno.
+	* linux-core-attach.c (core_set_initial_registers): Implement
+	pc_register support.
+	* linux-pid-attach.c (pid_thread_state_registers_cb): Implement
+	FIRSTREG -1.
+
+2013-11-30  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Introduce process_attach_error.
+	* dwfl_begin.c (dwfl_begin): Initialize process_attach_error.
+	* dwfl_frame.c (dwfl_pid, dwfl_getthreads): Use PROCESS_ATTACH_ERROR if
+	PROCESS is NULL.
+	* libdwflP.h (struct Dwfl): New field process_attach_error.
+	* linux-core-attach.c (__libdwfl_attach_state_for_core): Rename to ...
+	(attach_state_for_core): ... here, make it static, change return type,
+	no longer use __libdwfl_seterrno.
+	(__libdwfl_attach_state_for_core): New wrapper for it.
+
+2013-11-27  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_addrsym.c (dwfl_module_addrsym): Rename to and call...
+	(dwfl_module_addrsym_elf): this. Add elfp and biasp arguments,
+	keep track of symelf, addr_symelf, closest_elf and sizeless_elf
+	instead of tracking dwfl_files.
+	* dwfl_module_getsym.c (__libdwfl_module_getsym): Renamed to...
+	(dwfl_module_getsym_elf): ...this. Remove dwfl_file argument, add
+	new elfp and biasp arguments. Track elf instead of file.
+	(dwfl_module_getsym): Call dwfl_module_getsym_elf.
+	dwfl_module_info.c (dwfl_module_info): Pass elf to
+	dwfl_adjusted_st_value.
+	* libdwfl.h (dwfl_module_getsym): Document limitations of shndx.
+	(dwfl_module_getsym_elf): New function declaration.
+	(dwfl_module_addrsym_elf): Likewise.
+	* libdwflP.h (dwfl_module_addrsym_elf): INTDECL.
+	(dwfl_module_getsym_elf): Likewise.
+	(dwfl_adjusted_st_value): Take and check elf not dwfl_file.
+	(dwfl_deadjust_st_value): Likewise.
+	(__libdwfl_module_getsym): Removed.
+	* relocate.c (resolve_symbol): Pass elf to dwfl_adjusted_st_value.
+
+2013-11-21  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix non-build-id core files on build-id system.
+	* link_map.c (report_r_debug): Remove valid clearing if build-id cannot
+	be read from memory.
+
+2013-11-21  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_segment_report_module.c (dwfl_segment_report_module): New
+	variable close_elf.  Call __libdwfl_find_elf_build_id and compare the
+	content, if possible.
+
+2013-11-21  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	link_map: Use proper bias, not l_addr.
+	* core-file.c (dynamic_vaddr_get): Rename to ...
+	(__libdwfl_dynamic_vaddr_get): ... here, make it global,
+	internal_function.
+	(dwfl_core_file_report): Update name in the caller.
+	* libdwflP.h (__libdwfl_dynamic_vaddr_get): New declaration.
+	* link_map.c (report_r_debug): New variable elf_dynamic_vaddr.  Call
+	__libdwfl_dynamic_vaddr_get for it.  Remove L_ADDR FIXME comment.
+	Use ELF_DYNAMIC_VADDR instead of L_ADDR.
+
+2013-11-19  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Compatibility with older kernels such as RHEL-6.
+	* linux-pid-attach.c (struct pid_arg): New field tid_was_stopped.
+	(ptrace_attach): New parameter tid_was_stoppedp.  Set it.
+	(pid_set_initial_registers): Pass tid_was_stopped.
+	(pid_thread_detach): Use tid_was_stopped.
+
+2013-11-18  Josh Stone  <jistone@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_aux_address_sync): New function.
+	(find_aux_sym): Use it.
+
+2013-11-14  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Code cleanup: Remove const in prototype
+	* dwfl_frame_regs.c (dwfl_thread_state_registers): Remove const from
+	firstreg.
+	* libdwfl.h (dwfl_thread_state_registers): Likewise.
+	* linux-pid-attach.c (pid_thread_state_registers_cb): Likewise.
+
+2013-11-14  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix dwfl_attach_state machine->elf.
+	* dwfl_frame.c (dwfl_attach_state): Change parameter machine to elf.
+	Call ebl_openbackend instead of ebl_openbackend_machine.
+	* libdwfl.h (dwfl_attach_state): Change parameter machine to elf.
+	Update the function description.
+	* linux-core-attach.c (__libdwfl_attach_state_for_core): Pass CORE to
+	dwfl_attach_state.
+	* linux-pid-attach.c (__libdwfl_attach_state_for_pid): Pass NULL to
+	dwfl_attach_state.
+
+2013-11-06  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Provide __libdwfl_module_getsym to get dwfl_file *.
+	* dwfl_module_addrsym.c (dwfl_module_addrsym) (i_to_symfile): Remove.
+	(dwfl_module_addrsym) (search_table): New variable file.  Use
+	__libdwfl_module_getsym.  Use file.
+	* dwfl_module_getsym.c (dwfl_module_getsym): Rename to ...
+	(__libdwfl_module_getsym): ... here.  Add parameter filep.  Set it.
+	(dwfl_module_getsym): New wrapper.
+	* libdwflP.h (__libdwfl_module_getsym): New declaration.
+
+2013-11-13  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix dwfl_module_addrsym for minidebuginfo.
+	* dwfl_module_addrsym.c (dwfl_module_addrsym): New variable
+	addr_symfile.
+	(dwfl_module_addrsym) (same_section): Use it.
+	(dwfl_module_addrsym) (i_to_symfile): New function.
+	(dwfl_module_addrsym) (search_table): Use it.
+
+2013-11-07  Jan Kratochvil  <jan.kratochvil@redhat.com>
+	    Mark Wielaard  <mjw@redhat.com>
+
+	* Makefile.am (libdwfl_a_SOURCES): Add dwfl_frame.c, frame_unwind.c,
+	dwfl_frame_pc.c, linux-pid-attach.c, linux-core-attach.c and
+	dwfl_frame_regs.c.
+	* core-file.c (dwfl_core_file_report): Call
+	__libdwfl_attach_state_for_core.
+	* dwfl_end.c (dwfl_end): Call __libdwfl_process_free.
+	* dwfl_frame.c: New file.
+	* frame_unwind.c: New file.
+	* dwfl_frame_pc.c: New file.
+	* linux-pid-attach.c: New file.
+	* linux-core-attach.c: New file.
+	* dwfl_frame_regs.c: New file.
+	* libdwfl.h (Dwfl_Thread, Dwfl_Frame): New typedefs.
+	(dwfl_core_file_report, dwfl_linux_proc_report): Extend comments.
+	(Dwfl_Thread_Callbacks): New definition.
+	(struct ebl, dwfl_attach_state, dwfl_pid, dwfl_thread_dwfl)
+	(dwfl_thread_tid, dwfl_frame_thread, dwfl_thread_state_registers)
+	(dwfl_thread_state_register_pc, dwfl_getthreads, dwfl_thread_getframes)
+	(dwfl_frame_pc): New declarations.
+	* libdwflP.h (Dwfl_Process): New typedef.
+	(LIBEBL_BAD, CORE_MISSING, INVALID_REGISTER, PROCESS_MEMORY_READ)
+	(PROCESS_NO_ARCH, PARSE_PROC, INVALID_DWARF, UNSUPPORTED_DWARF)
+	(NEXT_THREAD_FAIL, ATTACH_STATE_CONFLICT, NO_ATTACH_STATE, NO_UNWIND)
+	(INVALID_ARGUMENT): New DWFL_ERROR entries.
+	(struct Dwfl): New entry process.
+	(struct Dwfl_Process, struct Dwfl_Thread, struct Dwfl_Frame)
+	(__libdwfl_frame_reg_get, __libdwfl_frame_reg_set)
+	(__libdwfl_process_free, __libdwfl_frame_unwind)
+	(__libdwfl_attach_state_for_pid, __libdwfl_attach_state_for_core)
+	(__libdwfl_segment_start, __libdwfl_segment_end): New declarations.
+	(dwfl_attach_state, dwfl_pid, dwfl_thread_dwfl, dwfl_thread_tid)
+	(dwfl_frame_thread, dwfl_thread_state_registers)
+	(dwfl_thread_state_register_pc, dwfl_getthreads, dwfl_thread_getframes)
+	(dwfl_frame_pc): New INTDECL entries.
+	* linux-proc-maps.c (dwfl_linux_proc_report): Call
+	__libdwfl_attach_state_for_pid.
+	* segment.c (segment_start): Rename to ...
+	(__libdwfl_segment_start): ... here and make it internal_function.
+	(segment_end): Rename to ...
+	(__libdwfl_segment_end): ... here and make it internal_function.
+	(reify_segments, dwfl_report_segment): Rename them at the callers.
+
+2013-11-07  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* core-file.c (dwfl_core_file_report): Remove the use of MAX.
+
+2013-11-07  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* core-file.c (dwfl_core_file_report): Replaced variable sniffed by
+	retval.  Fix one forgotten LISTED increase.
+
+2013-11-07  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix core files for re-prelink-ed files.
+	* core-file.c (dynamic_vaddr_get): New function.
+	(dwfl_core_file_report): New variable file_dynamic_vaddr.  Call
+	dynamic_vaddr_get instead of using L_ADDR.
+	* libdwflP.h (struct r_debug_info_module): Remove field l_addr.
+	* link_map.c (report_r_debug): Do not initialize l_addr.
+
+2013-11-07  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Code cleanup.
+	* core-file.c (dwfl_core_file_report): Reindent block of code by
+	continue keyword.
+
+2013-10-30  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* argp-std.c (parse_opt): Use executable parameter of
+	dwfl_core_file_report.
+	* core-file.c (dwfl_core_file_report): Add parameter executable.  Set
+	it to DWFL.  Add NEW_VERSION for it.
+	(_compat_without_executable_dwfl_core_file_report): New.  Twice.
+	* libdwfl.h (dwfl_core_file_report): Add parameter executable, update
+	the function comment.
+
+2013-10-15  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-proc-maps.c (proc_maps_report): Ignore non-absolute file
+	mappings.
+	(dwfl_linux_proc_find_elf): Don't abort, just return failure.
+
+2013-09-12  Mark Wielaard  <mjw@redhat.com>
+
+	* cu.c (intern_cu): If dwarf_offdie fails free cu.
+
+2013-09-12  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-proc-maps.c (proc_maps_report): Don't fclose FILE in
+	bad_report.
+
+2013-09-12  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_symtab): Call elf_getdata with
+	aux_xndxscn, not xndxscn, for aux_symxndxdata.
+
+2013-08-25  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-kernel-modules.c (report_kernel): Pass add_p_vaddr as true
+	to dwfl_report_elf.
+
+2013-07-25  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_segment_report_module.c (dwfl_segment_report_module): Check for
+	conflicts all the modules, not just the first one.  Compare L_LD if it
+	is equal, not if it is in a module address range.
+
+2013-07-23  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* libdwflP.h (__libdwfl_elf_address_range): Add internal_function.
+
+2013-07-23  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* core-file.c (clear_r_debug_info): Close also ELF and FD.
+	(dwfl_core_file_report): Call __libdwfl_report_elf for
+	R_DEBUG_INFO.MODULE.
+	* dwfl_report_elf.c (__libdwfl_elf_address_range): New function from
+	code of ...
+	(__libdwfl_report_elf): ... this function.  Call it.
+	* dwfl_segment_report_module.c: Include unistd.h.
+	(dwfl_segment_report_module): Use basename for MODULE->NAME.
+	Clear MODULE if it has no build-id and we have segment with build-id.
+	Ignore this segment only if MODULE still contains valid ELF.
+	* libdwflP.h (__libdwfl_elf_address_range): New declaration.
+	(struct r_debug_info_module): New fields fd, elf, l_addr, start, end
+	and disk_file_has_build_id.
+	(dwfl_link_map_report): Extend the comment.
+	* link_map.c (report_r_debug): Extend the comment.  Always fill in new
+	r_debug_info_module.  Initialize also the new r_debug_info_module
+	fields.  Remove one FIXME comment.  Call __libdwfl_elf_address_range
+	instead of __libdwfl_report_elf when R_DEBUG_INFO is not NULL.
+
+2013-07-19  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* libdwflP.h (__libdwfl_find_elf_build_id): Add internal_function.
+
+2013-07-02  Mark Wielaard  <mjw@redhat.com>
+
+	* relocate.c (__libdwfl_relocate_value): Remove mod->e_type assert.
+
+2013-06-05  Mark Wielaard  <mjw@redhat.com>
+
+	* link_map.c (report_r_debug): Always call release_buffer after
+	memory_callback succeeded reading build_id.
+
+2013-05-30  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* argp-std.c (parse_opt) <ARGP_KEY_SUCCESS> <opt->core> <opt->e>: Set
+	executable_for_core before calling dwfl_core_file_report.
+	* core-file.c (clear_r_debug_info): New function.
+	(dwfl_core_file_report): Move raw segments reporting lower.  New
+	variable r_debug_info, pass it to dwfl_segment_report_module.  Call
+	clear_r_debug_info in the end.  Return sum of LISTED and SNIFFED.
+	* dwfl_module_build_id.c (check_notes): Move into
+	__libdwfl_find_elf_build_id.
+	(__libdwfl_find_build_id): Rename to ...
+	(__libdwfl_find_elf_build_id): ... here.  Add parameters build_id_bits,
+	build_id_elfaddr and build_id_len.  Verify MOD vs. ELF.
+	(__libdwfl_find_elf_build_id) (check_notes): Remove parameters mod and
+	set, rename data_vaddr to data_elfaddr.  Do not call found_build_id.
+	(__libdwfl_find_elf_build_id): Update the check_notes caller, do not
+	adjust its data_elfaddr parameter.
+	(__libdwfl_find_build_id): New wrapper of __libdwfl_find_elf_build_id.
+	* dwfl_segment_report_module.c (dwfl_segment_report_module): New
+	parameter r_debug_info.  New variable name_is_final.  Adjust addresses
+	according to R_DEBUG_INFO->MODULE.  Check conflicts against DWFL.
+	Do not overwrite NAME by SONAME if NAME_IS_FINAL.
+	* libdwflP.h (__libdwfl_find_elf_build_id): New declaration.
+	(struct r_debug_info_module, struct r_debug_info): New definitions.
+	(dwfl_segment_report_module, dwfl_link_map_report): Add parameter
+	r_debug_info.
+	* link_map.c: Include fcntl.h.
+	(report_r_debug): Add parameter r_debug_info, describe it in the
+	function comment.  Delete dwfl_addrmodule call and its dependent code.
+	Verify build-id before calling dwfl_report_elf, also supply
+	executable_for_core to it.  Store r_debug_info->module info when
+	appropriate.
+	(dwfl_link_map_report): Add parameter r_debug_info.  New variable
+	in_ok.  Try to read IN from EXECUTABLE_FOR_CORE.  Update report_r_debug
+	caller parameters.
+
+2013-04-30  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_report_elf.c (__libdwfl_report_elf): Add parameter add_p_vaddr.
+	Set it to true for ET_EXEC and ET_CORE.  Provide alternative
+	setup of START and BIAS if !ADD_P_VADDR.  Set END from BIAS, not BASE.
+	(dwfl_report_elf): Add parameter add_p_vaddr.  Pass it down.  Add
+	NEW_VERSION.
+	(_compat_without_add_p_vaddr_dwfl_report_elf) <SHARED>: New, with
+	COMPAT_VERSION.
+	* libdwfl.h (dwfl_report_elf): Add parameter add_p_vaddr.  Describe it.
+	* libdwflP.h (__libdwfl_report_elf): Add parameter add_p_vaddr.
+	* link_map.c (report_r_debug): Use true add_p_vaddr for dwfl_report_elf.
+	* linux-kernel-modules.c (report_kernel): Use false add_p_vaddr for
+	dwfl_report_elf.
+	* offline.c (process_elf): Use true add_p_vaddr for dwfl_report_elf.
+
+2013-04-27  Mark Wielaard  <mjw@redhat.com>
+
+	* link_map.c: #include system.h.
+
+2013-04-26  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* link_map.c (BE32, BE64, LE32, LE64): Delete the definitions, move
+	them to lib/system.h.
+
+2013-04-24  Mark Wielaard  <mjw@redhat.com>
+
+	* Makefile.am: Use AM_CPPFLAGS instead of INCLUDES.
+
+2013-03-20  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_report_elf.c (__libdwfl_report_elf): Remove BASE aligning.
+
+2013-03-12  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_getsrclines.c (dwfl_getsrclines): Return 0 on success.
+
+2013-02-22  Mark Wielaard  <mjw@redhat.com>
+
+	* open.c (__libdw_gunzip,__libdw_bunzip2,__libdw_unlzma): Define
+	as DWFL_E_BADELF when not used.
+
+2013-02-10  Mark Wielaard  <mjw@redhat.com>
+
+	* argp-std.c (parse_opt): Use opt->core and opt->e explicitly in
+	failure messages When handling ARGP_KEY_SUCCESS because arg will
+	not have been set.
+
+2013-01-30  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* linux-proc-maps.c: Include system.h.
+	(PROCEXEFMT, get_pid_class): New.
+	(grovel_auxv): Detect 32-bit vs. 64-bit auxv, possibly call
+	get_pid_class.
+
+2013-01-23  Mark Wielaard  <mjw@redhat.com>
+
+	* dwfl_module_getdwarf.c (find_aux_sym): Don't substract one
+	from aux_syments by default.
+	(find_symtab): Also succeed when only aux_symdata is found.
+	When no symtab is found always try to load auxiliary table.
+	(dwfl_module_getsymtab): Substract one from result when both
+	tables have symbols.
+	* dwfl_module_getsym.c (dwfl_module_getsym): Only skip auxiliary
+	zero entry when both tables have symbols.
+	* dwfl_module_addrsym.c (dwfl_module_addrsym): Only substract
+	one from first_global when both tables have symbols.
+
+2013-01-16  Mark Wielaard  <mjw@redhat.com>
+
+	* libdwflP.h (struct Dwfl_Module): Add aux_sym, aux_symdata,
+	aux_syments, aux_symstrdata, aux_symxndxdata and aux_first_global.
+	(dwfl_adjusted_aux_sym_addr): New function.
+	(dwfl_deadjust_aux_sym_addr): Likewise.
+	(dwfl_adjusted_st_value): Take and check symfile argument.
+	(dwfl_deadjust_st_value): Likewise.
+	* dwfl_module_getdwarf.c (find_prelink_address_sync): Take and
+	use dwfl_file as argument to set address_sync.
+	(find_debuginfo): Call find_prelink_address_sync with debug file.
+	(find_aux_sym): New function.
+	(find_symtab): Use find_aux_sym if all we have is the dynsym table
+	and fill in aux DwflModule fields.
+	(dwfl_module_getsymtab): Return syments plus aux_syments.
+	(load_symtab): Always set first_global.
+	* dwfl_module_addrsym.c (dwfl_module_addrsym): Check symfile
+	when using same_section. Calculate first_global based on both
+	mod->first_global and mod->aux_first_global.
+	* dwfl_module.c (__libdwfl_module_free): Free aux_sym.
+	* dwfl_module_getsym.c (dwfl_module_getsym): Use auxsym table
+	to retrieve symbol and name if necessary, making sure all locals
+	from any table come before any globals.
+	* dwfl_module_info.c (dwfl_module_info): Call dwfl_adjusted_st_value
+	with symfile.
+	* relocate.c (resolve_symbol): Likewise.
+
+2013-01-07  Roland McGrath  <roland@hack.frob.com>
+
+	* link_map.c (auxv_format_probe): Handle unaligned 64-bit data, but
+	still assume the data is at least 32-bit aligned anyway.
+	(dwfl_link_map_report): Handle unaligned auxv data.
+
+2012-12-11  Mark Wielaard  <mjw@redhat.com>
+
+	* linux-kernel-modules.c (report_kernel): Only free fname if
+	find_kernel_elf succeeds and allocates it.
+	(report_kernel_archive): Fix brackets around unlikely expression.
+
+2012-11-29  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* argp-std.c: Update Copyright year.
+	(offline_find_elf): New function.
+	(offline_callbacks): Use it for find_elf.
+	(struct parse_opt): New.
+	(parse_opt): New key ARGP_KEY_INIT.  In other make hook struct
+	parse_opt pointer from former Dwfl pointer.  Delay 'e and OPT_COREFILE
+	processing till ARGP_KEY_SUCCESS.  Initialize state->input already from
+	ARGP_KEY_SUCCESS.  Modify the cleanup in ARGP_KEY_ERROR.  Make the
+	final state->input initialization optional.
+	* dwfl_end.c: Update Copyright year.
+	(dwfl_end): Free executable_for_core.
+	* libdwflP.h: Update Copyright year.
+	(struct Dwfl): New field executable_for_core.
+
+2012-11-20  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_report_elf.c (__libdwfl_report_elf): Simplify START and BIAS
+	calculation.
+
+2012-10-17  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_module_getdwarf.c (mod_verify_build_id): New function with code
+	from ...
+	(__libdwfl_getelf): ... here.  Call it.
+
+2012-10-17  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* libdwfl.h (dwfl_module_getelf): Add __nonnull_attribute__.
+
+2012-10-10  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_segment_report_module.c (dwfl_segment_report_module):
+	Initialize mod->MAIN_BIAS.
+
+2012-10-10  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwfl_module_addrsym.c (dwfl_module_addrsym): New function
+	binding_value.  Use it for both zero and non-zero size symbols
+	comparisons.
+
+2012-10-01  Mark Wielaard  <mjw@redhat.com>
+
+	* cu.c (cudie_offset): Don't use type_sig8, it might not be
+	initialized and these are always real CUs, never TUs.
+
+2012-10-01  Mark Wielaard  <mjw@redhat.com>
+
+	* derelocate.c (find_section): Check next section exists before
+	accessing it.
+
+2012-08-01  Petr Machata  <pmachata@redhat.com>
+
+	* offline.c (process_archive_member): Ignore entry "/SYM64/".
+
+2012-03-28  Roland McGrath  <roland@hack.frob.com>
+
+	* dwfl_segment_report_module.c
+	(dwfl_segment_report_module: read_portion): Don't use existing buffer
+	when FILESZ is zero (string mode) and available portion doesn't hold
+	a terminated string.
+
 2011-12-02  Roland McGrath  <roland@hack.frob.com>
 
 	* elf-from-memory.c (elf_from_remote_memory): Fix ELFCLASS64 case
diff --git a/src/libdwfl/Makefile b/src/libdwfl/Makefile
new file mode 100644
index 00000000..48180b24
--- /dev/null
+++ b/src/libdwfl/Makefile
@@ -0,0 +1,801 @@
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+AM_CPPFLAGS = -I. -I$(srcdir) -I$(top_srcdir)/lib -I.. -I$(srcdir) \
+	-I$(srcdir)/../libelf -I$(srcdir)/../libebl \
+	-I$(srcdir)/../libdw -I$(srcdir)/../libdwelf
+AM_CFLAGS = -std=gnu99 -Wall -Wshadow -Wformat=2 \
+	    $(if $($(*F)_no_Werror),,-Werror) \
+	    $(if $($(*F)_no_Wunused),,-Wunused -Wextra) \
+	    $($(*F)_CFLAGS)
+
+COMPILE.os = $(filter-out -fprofile-arcs -ftest-coverage, $(COMPILE))
+CLEANFILES = *.gcno *.gcda $(am_libdwfl_pic_a_OBJECTS)
+textrel_msg = echo "WARNING: TEXTREL found in '$@'"
+#textrel_found = $(textrel_msg)
+textrel_found = $(textrel_msg); exit 1
+textrel_check = if $(READELF) -d $@ | fgrep -q TEXTREL; then $(textrel_found); fi
+noinst_LIBRARIES = libdwfl.a libdwfl_pic.a
+pkginclude_HEADERS = libdwfl.h
+libdwfl_a_SOURCES = dwfl_begin.c dwfl_end.c dwfl_error.c \
+	dwfl_version.c dwfl_module.c dwfl_report_elf.c relocate.c \
+	dwfl_module_build_id.c dwfl_module_report_build_id.c \
+	derelocate.c offline.c segment.c dwfl_module_info.c \
+	dwfl_getmodules.c dwfl_getdwarf.c dwfl_module_getdwarf.c \
+	dwfl_module_getelf.c dwfl_validate_address.c argp-std.c \
+	find-debuginfo.c dwfl_build_id_find_elf.c \
+	dwfl_build_id_find_debuginfo.c linux-kernel-modules.c \
+	linux-proc-maps.c dwfl_addrmodule.c dwfl_addrdwarf.c cu.c \
+	dwfl_module_nextcu.c dwfl_nextcu.c dwfl_cumodule.c \
+	dwfl_module_addrdie.c dwfl_addrdie.c lines.c dwfl_lineinfo.c \
+	dwfl_line_comp_dir.c dwfl_linemodule.c dwfl_linecu.c \
+	dwfl_dwarf_line.c dwfl_getsrclines.c dwfl_onesrcline.c \
+	dwfl_module_getsrc.c dwfl_getsrc.c dwfl_module_getsrc_file.c \
+	libdwfl_crc32.c libdwfl_crc32_file.c elf-from-memory.c \
+	dwfl_module_dwarf_cfi.c dwfl_module_eh_cfi.c \
+	dwfl_module_getsym.c dwfl_module_addrname.c \
+	dwfl_module_addrsym.c dwfl_module_return_value_location.c \
+	dwfl_module_register_names.c dwfl_segment_report_module.c \
+	link_map.c core-file.c open.c image-header.c dwfl_frame.c \
+	frame_unwind.c dwfl_frame_pc.c linux-pid-attach.c \
+	linux-core-attach.c dwfl_frame_regs.c $(am__append_1) \
+	$(am__append_2) $(am__append_3)
+libdwfl = $(libdw)
+libdw = ../libdw/libdw.so
+libelf = ../libelf/libelf.so
+libebl = ../libebl/libebl.a
+libeu = ../lib/libeu.a
+libdwfl_pic_a_SOURCES = 
+am_libdwfl_pic_a_OBJECTS = $(libdwfl_a_SOURCES:.c=.os)
+noinst_HEADERS = libdwflP.h
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .o .obj
+$(srcdir)/Makefile.in: # $(srcdir)/Makefile.am $(top_srcdir)/config/eu.am $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnits libdwfl/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnits libdwfl/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+$(top_srcdir)/config/eu.am:
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: # $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): # $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-noinstLIBRARIES:
+	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
+
+libdwfl.a: $(libdwfl_a_OBJECTS) $(libdwfl_a_DEPENDENCIES) $(EXTRA_libdwfl_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libdwfl.a
+	$(AM_V_AR)$(libdwfl_a_AR) libdwfl.a $(libdwfl_a_OBJECTS) $(libdwfl_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libdwfl.a
+
+libdwfl_pic.a: $(libdwfl_pic_a_OBJECTS) $(libdwfl_pic_a_DEPENDENCIES) $(EXTRA_libdwfl_pic_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libdwfl_pic.a
+	$(AM_V_AR)$(libdwfl_pic_a_AR) libdwfl_pic.a $(libdwfl_pic_a_OBJECTS) $(libdwfl_pic_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libdwfl_pic.a
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+include ./$(DEPDIR)/argp-std.Po
+include ./$(DEPDIR)/bzip2.Po
+include ./$(DEPDIR)/core-file.Po
+include ./$(DEPDIR)/cu.Po
+include ./$(DEPDIR)/derelocate.Po
+include ./$(DEPDIR)/dwfl_addrdie.Po
+include ./$(DEPDIR)/dwfl_addrdwarf.Po
+include ./$(DEPDIR)/dwfl_addrmodule.Po
+include ./$(DEPDIR)/dwfl_begin.Po
+include ./$(DEPDIR)/dwfl_build_id_find_debuginfo.Po
+include ./$(DEPDIR)/dwfl_build_id_find_elf.Po
+include ./$(DEPDIR)/dwfl_cumodule.Po
+include ./$(DEPDIR)/dwfl_dwarf_line.Po
+include ./$(DEPDIR)/dwfl_end.Po
+include ./$(DEPDIR)/dwfl_error.Po
+include ./$(DEPDIR)/dwfl_frame.Po
+include ./$(DEPDIR)/dwfl_frame_pc.Po
+include ./$(DEPDIR)/dwfl_frame_regs.Po
+include ./$(DEPDIR)/dwfl_getdwarf.Po
+include ./$(DEPDIR)/dwfl_getmodules.Po
+include ./$(DEPDIR)/dwfl_getsrc.Po
+include ./$(DEPDIR)/dwfl_getsrclines.Po
+include ./$(DEPDIR)/dwfl_line_comp_dir.Po
+include ./$(DEPDIR)/dwfl_linecu.Po
+include ./$(DEPDIR)/dwfl_lineinfo.Po
+include ./$(DEPDIR)/dwfl_linemodule.Po
+include ./$(DEPDIR)/dwfl_module.Po
+include ./$(DEPDIR)/dwfl_module_addrdie.Po
+include ./$(DEPDIR)/dwfl_module_addrname.Po
+include ./$(DEPDIR)/dwfl_module_addrsym.Po
+include ./$(DEPDIR)/dwfl_module_build_id.Po
+include ./$(DEPDIR)/dwfl_module_dwarf_cfi.Po
+include ./$(DEPDIR)/dwfl_module_eh_cfi.Po
+include ./$(DEPDIR)/dwfl_module_getdwarf.Po
+include ./$(DEPDIR)/dwfl_module_getelf.Po
+include ./$(DEPDIR)/dwfl_module_getsrc.Po
+include ./$(DEPDIR)/dwfl_module_getsrc_file.Po
+include ./$(DEPDIR)/dwfl_module_getsym.Po
+include ./$(DEPDIR)/dwfl_module_info.Po
+include ./$(DEPDIR)/dwfl_module_nextcu.Po
+include ./$(DEPDIR)/dwfl_module_register_names.Po
+include ./$(DEPDIR)/dwfl_module_report_build_id.Po
+include ./$(DEPDIR)/dwfl_module_return_value_location.Po
+include ./$(DEPDIR)/dwfl_nextcu.Po
+include ./$(DEPDIR)/dwfl_onesrcline.Po
+include ./$(DEPDIR)/dwfl_report_elf.Po
+include ./$(DEPDIR)/dwfl_segment_report_module.Po
+include ./$(DEPDIR)/dwfl_validate_address.Po
+include ./$(DEPDIR)/dwfl_version.Po
+include ./$(DEPDIR)/elf-from-memory.Po
+include ./$(DEPDIR)/find-debuginfo.Po
+include ./$(DEPDIR)/frame_unwind.Po
+include ./$(DEPDIR)/gzip.Po
+include ./$(DEPDIR)/image-header.Po
+include ./$(DEPDIR)/libdwfl_crc32.Po
+include ./$(DEPDIR)/libdwfl_crc32_file.Po
+include ./$(DEPDIR)/lines.Po
+include ./$(DEPDIR)/link_map.Po
+include ./$(DEPDIR)/linux-core-attach.Po
+include ./$(DEPDIR)/linux-kernel-modules.Po
+include ./$(DEPDIR)/linux-pid-attach.Po
+include ./$(DEPDIR)/linux-proc-maps.Po
+include ./$(DEPDIR)/lzma.Po
+include ./$(DEPDIR)/offline.Po
+include ./$(DEPDIR)/open.Po
+include ./$(DEPDIR)/relocate.Po
+include ./$(DEPDIR)/segment.Po
+
+.c.o:
+	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+#	$(AM_V_CC)source='$<' object='$@' libtool=no \
+#	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) \
+#	$(AM_V_CC_no)$(COMPILE) -c -o $@ $<
+
+.c.obj:
+	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
+	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+#	$(AM_V_CC)source='$<' object='$@' libtool=no \
+#	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) \
+#	$(AM_V_CC_no)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+install-pkgincludeHEADERS: $(pkginclude_HEADERS)
+	@$(NORMAL_INSTALL)
+	@list='$(pkginclude_HEADERS)'; test -n "$(pkgincludedir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(pkgincludedir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(pkgincludedir)" || exit 1; \
+	fi; \
+	for p in $$list; do \
+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  echo "$$d$$p"; \
+	done | $(am__base_list) | \
+	while read files; do \
+	  echo " $(INSTALL_HEADER) $$files '$(DESTDIR)$(pkgincludedir)'"; \
+	  $(INSTALL_HEADER) $$files "$(DESTDIR)$(pkgincludedir)" || exit $$?; \
+	done
+
+uninstall-pkgincludeHEADERS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(pkginclude_HEADERS)'; test -n "$(pkgincludedir)" || list=; \
+	files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \
+	dir='$(DESTDIR)$(pkgincludedir)'; $(am__uninstall_files_from_dir)
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LIBRARIES) $(HEADERS)
+installdirs:
+	for dir in "$(DESTDIR)$(pkgincludedir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-noinstLIBRARIES mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-pkgincludeHEADERS
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-pkgincludeHEADERS
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am check check-am clean clean-generic \
+	clean-noinstLIBRARIES cscopelist-am ctags ctags-am distclean \
+	distclean-compile distclean-generic distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-pkgincludeHEADERS install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic pdf pdf-am \
+	ps ps-am tags tags-am uninstall uninstall-am \
+	uninstall-pkgincludeHEADERS
+
+
+%.os: %.c %.o
+	if $(COMPILE.os) -c -o $@ -fpic -DPIC -DSHARED -MT $@ -MD -MP \
+	  -MF "$(DEPDIR)/$*.Tpo" `test -f '$<' || echo '$(srcdir)/'`$<; \
+	then cat "$(DEPDIR)/$*.Tpo" >> "$(DEPDIR)/$*.Po"; \
+	     rm -f "$(DEPDIR)/$*.Tpo"; \
+	else rm -f "$(DEPDIR)/$*.Tpo"; exit 1; \
+	fi
+#	$(COMPILE.os) -c -o $@ -fpic -DPIC -DSHARED $<
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/libdwfl/Makefile.am b/src/libdwfl/Makefile.am
index 65b38965..72c980bf 100644
--- a/src/libdwfl/Makefile.am
+++ b/src/libdwfl/Makefile.am
@@ -2,39 +2,40 @@
 ##
 ## Process this file with automake to create Makefile.in
 ##
-## Copyright (C) 2005-2010 Red Hat, Inc.
-## This file is part of Red Hat elfutils.
+## Copyright (C) 2005-2010, 2013 Red Hat, Inc.
+## This file is part of elfutils.
 ##
-## Red Hat elfutils is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by the
-## Free Software Foundation; version 2 of the License.
+## This file is free software; you can redistribute it and/or modify
+## it under the terms of either
 ##
-## Red Hat elfutils is distributed in the hope that it will be useful, but
+##   * the GNU Lesser General Public License as published by the Free
+##     Software Foundation; either version 3 of the License, or (at
+##     your option) any later version
+##
+## or
+##
+##   * the GNU General Public License as published by the Free
+##     Software Foundation; either version 2 of the License, or (at
+##     your option) any later version
+##
+## or both in parallel, as here.
+##
+## elfutils is distributed in the hope that it will be useful, but
 ## WITHOUT ANY WARRANTY; without even the implied warranty of
 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 ## General Public License for more details.
 ##
-## You should have received a copy of the GNU General Public License along
-## with Red Hat elfutils; if not, write to the Free Software Foundation,
-## Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-##
-## Red Hat elfutils is an included package of the Open Invention Network.
-## An included package of the Open Invention Network is a package for which
-## Open Invention Network licensees cross-license their patents.  No patent
-## license is granted, either expressly or impliedly, by designation as an
-## included package.  Should you wish to participate in the Open Invention
-## Network licensing program, please visit www.openinventionnetwork.com
-## <http://www.openinventionnetwork.com>.
+## You should have received copies of the GNU General Public License and
+## the GNU Lesser General Public License along with this program.  If
+## not, see <http://www.gnu.org/licenses/>.
 ##
 include $(top_srcdir)/config/eu.am
-INCLUDES += -I$(srcdir) -I$(srcdir)/../libelf -I$(srcdir)/../libebl \
-	   -I$(srcdir)/../libdw
+AM_CPPFLAGS += -I$(srcdir) -I$(srcdir)/../libelf -I$(srcdir)/../libebl \
+	   -I$(srcdir)/../libdw -I$(srcdir)/../libdwelf
 VERSION = 1
 
 noinst_LIBRARIES = libdwfl.a
-if !MUDFLAP
 noinst_LIBRARIES += libdwfl_pic.a
-endif
 
 pkginclude_HEADERS = libdwfl.h
 
@@ -65,7 +66,9 @@ libdwfl_a_SOURCES = dwfl_begin.c dwfl_end.c dwfl_error.c dwfl_version.c \
 		    dwfl_module_return_value_location.c \
 		    dwfl_module_register_names.c \
 		    dwfl_segment_report_module.c \
-		    link_map.c core-file.c open.c image-header.c
+		    link_map.c core-file.c open.c image-header.c \
+		    dwfl_frame.c frame_unwind.c dwfl_frame_pc.c \
+		    linux-pid-attach.c linux-core-attach.c dwfl_frame_regs.c
 
 if ZLIB
 libdwfl_a_SOURCES += gzip.c
@@ -77,22 +80,14 @@ if LZMA
 libdwfl_a_SOURCES += lzma.c
 endif
 
-if MUDFLAP
-libdwfl = libdwfl.a $(libdw) $(libebl) $(libelf) $(libeu)
-libdw = ../libdw/libdw.a
-libelf = ../libelf/libelf.a
-else
 libdwfl = $(libdw)
 libdw = ../libdw/libdw.so
 libelf = ../libelf/libelf.so
-endif
 libebl = ../libebl/libebl.a
 libeu = ../lib/libeu.a
 
-if !MUDFLAP
 libdwfl_pic_a_SOURCES =
 am_libdwfl_pic_a_OBJECTS = $(libdwfl_a_SOURCES:.c=.os)
-endif
 
 noinst_HEADERS = libdwflP.h
 
diff --git a/src/libdwfl/Makefile.in b/src/libdwfl/Makefile.in
index b22e1ad1..f00e79e4 100644
--- a/src/libdwfl/Makefile.in
+++ b/src/libdwfl/Makefile.in
@@ -1,9 +1,8 @@
-# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# Makefile.in generated by automake 1.14.1 from Makefile.am.
 # @configure_input@
 
-# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
-# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
-# Inc.
+# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+
 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
@@ -17,6 +16,51 @@
 
 
 VPATH = @srcdir@
+am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
 pkgdatadir = $(datadir)/@PACKAGE@
 pkgincludedir = $(includedir)/@PACKAGE@
 pkglibdir = $(libdir)/@PACKAGE@
@@ -35,18 +79,16 @@ PRE_UNINSTALL = :
 POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
-DIST_COMMON = $(noinst_HEADERS) $(pkginclude_HEADERS) \
-	$(srcdir)/Makefile.am $(srcdir)/Makefile.in \
-	$(top_srcdir)/config/eu.am ChangeLog
-@MUDFLAP_TRUE@am__append_1 = -fmudflap
-@MUDFLAP_FALSE@am__append_2 = libdwfl_pic.a
-@ZLIB_TRUE@am__append_3 = gzip.c
-@BZLIB_TRUE@am__append_4 = bzip2.c
-@LZMA_TRUE@am__append_5 = lzma.c
-@MUDFLAP_TRUE@am_libdwfl_pic_a_OBJECTS =
+DIST_COMMON = $(top_srcdir)/config/eu.am $(srcdir)/Makefile.in \
+	$(srcdir)/Makefile.am $(top_srcdir)/config/depcomp \
+	$(noinst_HEADERS) $(pkginclude_HEADERS) ChangeLog
+@ZLIB_TRUE@am__append_1 = gzip.c
+@BZLIB_TRUE@am__append_2 = bzip2.c
+@LZMA_TRUE@am__append_3 = lzma.c
 subdir = libdwfl
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/nls.m4 $(top_srcdir)/m4/po.m4 \
+am__aclocal_m4_deps = $(top_srcdir)/m4/biarch.m4 \
+	$(top_srcdir)/m4/nls.m4 $(top_srcdir)/m4/po.m4 \
 	$(top_srcdir)/m4/progtest.m4 $(top_srcdir)/m4/zip.m4 \
 	$(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
@@ -56,8 +98,11 @@ CONFIG_HEADER = $(top_builddir)/config.h
 CONFIG_CLEAN_FILES =
 CONFIG_CLEAN_VPATH_FILES =
 LIBRARIES = $(noinst_LIBRARIES)
-AR = ar
 ARFLAGS = cru
+AM_V_AR = $(am__v_AR_@AM_V@)
+am__v_AR_ = $(am__v_AR_@AM_DEFAULT_V@)
+am__v_AR_0 = @echo "  AR      " $@;
+am__v_AR_1 = 
 libdwfl_a_AR = $(AR) $(ARFLAGS)
 libdwfl_a_LIBADD =
 am__libdwfl_a_SOURCES_DIST = dwfl_begin.c dwfl_end.c dwfl_error.c \
@@ -79,8 +124,9 @@ am__libdwfl_a_SOURCES_DIST = dwfl_begin.c dwfl_end.c dwfl_error.c \
 	dwfl_module_getsym.c dwfl_module_addrname.c \
 	dwfl_module_addrsym.c dwfl_module_return_value_location.c \
 	dwfl_module_register_names.c dwfl_segment_report_module.c \
-	link_map.c core-file.c open.c image-header.c gzip.c bzip2.c \
-	lzma.c
+	link_map.c core-file.c open.c image-header.c dwfl_frame.c \
+	frame_unwind.c dwfl_frame_pc.c linux-pid-attach.c \
+	linux-core-attach.c dwfl_frame_regs.c gzip.c bzip2.c lzma.c
 @ZLIB_TRUE@am__objects_1 = gzip.$(OBJEXT)
 @BZLIB_TRUE@am__objects_2 = bzip2.$(OBJEXT)
 @LZMA_TRUE@am__objects_3 = lzma.$(OBJEXT)
@@ -114,21 +160,49 @@ am_libdwfl_a_OBJECTS = dwfl_begin.$(OBJEXT) dwfl_end.$(OBJEXT) \
 	dwfl_module_register_names.$(OBJEXT) \
 	dwfl_segment_report_module.$(OBJEXT) link_map.$(OBJEXT) \
 	core-file.$(OBJEXT) open.$(OBJEXT) image-header.$(OBJEXT) \
+	dwfl_frame.$(OBJEXT) frame_unwind.$(OBJEXT) \
+	dwfl_frame_pc.$(OBJEXT) linux-pid-attach.$(OBJEXT) \
+	linux-core-attach.$(OBJEXT) dwfl_frame_regs.$(OBJEXT) \
 	$(am__objects_1) $(am__objects_2) $(am__objects_3)
 libdwfl_a_OBJECTS = $(am_libdwfl_a_OBJECTS)
 libdwfl_pic_a_AR = $(AR) $(ARFLAGS)
 libdwfl_pic_a_LIBADD =
 libdwfl_pic_a_OBJECTS = $(am_libdwfl_pic_a_OBJECTS)
+AM_V_P = $(am__v_P_@AM_V@)
+am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
+am__v_P_0 = false
+am__v_P_1 = :
+AM_V_GEN = $(am__v_GEN_@AM_V@)
+am__v_GEN_ = $(am__v_GEN_@AM_DEFAULT_V@)
+am__v_GEN_0 = @echo "  GEN     " $@;
+am__v_GEN_1 = 
+AM_V_at = $(am__v_at_@AM_V@)
+am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
+am__v_at_0 = @
+am__v_at_1 = 
 DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
 depcomp = $(SHELL) $(top_srcdir)/config/depcomp
 am__depfiles_maybe = depfiles
 am__mv = mv -f
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_@AM_V@)
+am__v_CC_ = $(am__v_CC_@AM_DEFAULT_V@)
+am__v_CC_0 = @echo "  CC      " $@;
+am__v_CC_1 = 
 CCLD = $(CC)
 LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_@AM_V@)
+am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
+am__v_CCLD_0 = @echo "  CCLD    " $@;
+am__v_CCLD_1 = 
 SOURCES = $(libdwfl_a_SOURCES) $(libdwfl_pic_a_SOURCES)
 DIST_SOURCES = $(am__libdwfl_a_SOURCES_DIST) $(libdwfl_pic_a_SOURCES)
+am__can_run_installinfo = \
+  case $$AM_UPDATE_INFO_DIR in \
+    n|no|NO) false;; \
+    *) (install-info --version) >/dev/null 2>&1;; \
+  esac
 am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
 am__vpath_adj = case $$p in \
     $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
@@ -150,20 +224,47 @@ am__nobase_list = $(am__nobase_strip_setup); \
 am__base_list = \
   sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
   sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__uninstall_files_from_dir = { \
+  test -z "$$files" \
+    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
+    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
+         $(am__cd) "$$dir" && rm -f $$files; }; \
+  }
 am__installdirs = "$(DESTDIR)$(pkgincludedir)"
 HEADERS = $(noinst_HEADERS) $(pkginclude_HEADERS)
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+# Read a list of newline-separated strings from the standard input,
+# and print each of them once, without duplicates.  Input order is
+# *not* preserved.
+am__uniquify_input = $(AWK) '\
+  BEGIN { nonempty = 0; } \
+  { items[$$0] = 1; nonempty = 1; } \
+  END { if (nonempty) { for (i in items) print i; }; } \
+'
+# Make sure the list of sources is unique.  This is necessary because,
+# e.g., the same source file might be shared among _SOURCES variables
+# for different programs/libraries.
+am__define_uniq_tagged_files = \
+  list='$(am__tagged_files)'; \
+  unique=`for i in $$list; do \
+    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+  done | $(am__uniquify_input)`
 ETAGS = etags
 CTAGS = ctags
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
 AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+AR = @AR@
 AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
 AWK = @AWK@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
+CC_BIARCH = @CC_BIARCH@
 CFLAGS = @CFLAGS@
+CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEBUGPRED = @DEBUGPRED@
@@ -172,10 +273,13 @@ DEPDIR = @DEPDIR@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
+EGREP = @EGREP@
 EXEEXT = @EXEEXT@
 GETTEXT_MACRO_VERSION = @GETTEXT_MACRO_VERSION@
 GMSGFMT = @GMSGFMT@
 GMSGFMT_015 = @GMSGFMT_015@
+GREP = @GREP@
+HAVE_VALGRIND = @HAVE_VALGRIND@
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
@@ -196,6 +300,7 @@ MODVERSION = @MODVERSION@
 MSGFMT = @MSGFMT@
 MSGFMT_015 = @MSGFMT_015@
 MSGMERGE = @MSGMERGE@
+NM = @NM@
 OBJEXT = @OBJEXT@
 PACKAGE = @PACKAGE@
 PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
@@ -206,6 +311,7 @@ PACKAGE_URL = @PACKAGE_URL@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
 RANLIB = @RANLIB@
+READELF = @READELF@
 SET_MAKE = @SET_MAKE@
 SHELL = @SHELL@
 STRIP = @STRIP@
@@ -220,6 +326,7 @@ abs_builddir = @abs_builddir@
 abs_srcdir = @abs_srcdir@
 abs_top_builddir = @abs_top_builddir@
 abs_top_srcdir = @abs_top_srcdir@
+ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
@@ -269,22 +376,21 @@ top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 zip_LIBS = @zip_LIBS@
-INCLUDES = -I. -I$(srcdir) -I$(top_srcdir)/lib -I.. -I$(srcdir) \
+AM_CPPFLAGS = -I. -I$(srcdir) -I$(top_srcdir)/lib -I.. -I$(srcdir) \
 	-I$(srcdir)/../libelf -I$(srcdir)/../libebl \
-	-I$(srcdir)/../libdw
-AM_CFLAGS = -std=gnu99 -Wall -Wshadow $(if \
-	$($(*F)_no_Werror),,-Werror) $(if \
-	$($(*F)_no_Wunused),,-Wunused -Wextra) $(if \
-	$($(*F)_no_Wformat),-Wno-format,-Wformat=2) $($(*F)_CFLAGS) \
-	$(am__append_1)
-@MUDFLAP_FALSE@libmudflap = 
-@MUDFLAP_TRUE@libmudflap = -lmudflap
-COMPILE.os = $(filter-out -fprofile-arcs -ftest-coverage $(no_mudflap.os),\
-	     		  $(COMPILE))
+	-I$(srcdir)/../libdw -I$(srcdir)/../libdwelf
+AM_CFLAGS = -std=gnu99 -Wall -Wshadow -Wformat=2 \
+	    $(if $($(*F)_no_Werror),,-Werror) \
+	    $(if $($(*F)_no_Wunused),,-Wunused -Wextra) \
+	    $($(*F)_CFLAGS)
 
+COMPILE.os = $(filter-out -fprofile-arcs -ftest-coverage, $(COMPILE))
 CLEANFILES = *.gcno *.gcda $(am_libdwfl_pic_a_OBJECTS)
-textrel_check = if readelf -d $@ | fgrep -q TEXTREL; then exit 1; fi
-noinst_LIBRARIES = libdwfl.a $(am__append_2)
+textrel_msg = echo "WARNING: TEXTREL found in '$@'"
+@FATAL_TEXTREL_FALSE@textrel_found = $(textrel_msg)
+@FATAL_TEXTREL_TRUE@textrel_found = $(textrel_msg); exit 1
+textrel_check = if $(READELF) -d $@ | fgrep -q TEXTREL; then $(textrel_found); fi
+noinst_LIBRARIES = libdwfl.a libdwfl_pic.a
 pkginclude_HEADERS = libdwfl.h
 libdwfl_a_SOURCES = dwfl_begin.c dwfl_end.c dwfl_error.c \
 	dwfl_version.c dwfl_module.c dwfl_report_elf.c relocate.c \
@@ -305,18 +411,17 @@ libdwfl_a_SOURCES = dwfl_begin.c dwfl_end.c dwfl_error.c \
 	dwfl_module_getsym.c dwfl_module_addrname.c \
 	dwfl_module_addrsym.c dwfl_module_return_value_location.c \
 	dwfl_module_register_names.c dwfl_segment_report_module.c \
-	link_map.c core-file.c open.c image-header.c $(am__append_3) \
-	$(am__append_4) $(am__append_5)
-@MUDFLAP_FALSE@libdwfl = $(libdw)
-@MUDFLAP_TRUE@libdwfl = libdwfl.a $(libdw) $(libebl) $(libelf) $(libeu)
-@MUDFLAP_FALSE@libdw = ../libdw/libdw.so
-@MUDFLAP_TRUE@libdw = ../libdw/libdw.a
-@MUDFLAP_FALSE@libelf = ../libelf/libelf.so
-@MUDFLAP_TRUE@libelf = ../libelf/libelf.a
+	link_map.c core-file.c open.c image-header.c dwfl_frame.c \
+	frame_unwind.c dwfl_frame_pc.c linux-pid-attach.c \
+	linux-core-attach.c dwfl_frame_regs.c $(am__append_1) \
+	$(am__append_2) $(am__append_3)
+libdwfl = $(libdw)
+libdw = ../libdw/libdw.so
+libelf = ../libelf/libelf.so
 libebl = ../libebl/libebl.a
 libeu = ../lib/libeu.a
-@MUDFLAP_FALSE@libdwfl_pic_a_SOURCES = 
-@MUDFLAP_FALSE@am_libdwfl_pic_a_OBJECTS = $(libdwfl_a_SOURCES:.c=.os)
+libdwfl_pic_a_SOURCES = 
+am_libdwfl_pic_a_OBJECTS = $(libdwfl_a_SOURCES:.c=.os)
 noinst_HEADERS = libdwflP.h
 all: all-am
 
@@ -343,6 +448,7 @@ Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
 	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
 	esac;
+$(top_srcdir)/config/eu.am:
 
 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
@@ -355,14 +461,16 @@ $(am__aclocal_m4_deps):
 
 clean-noinstLIBRARIES:
 	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
-libdwfl.a: $(libdwfl_a_OBJECTS) $(libdwfl_a_DEPENDENCIES) 
-	-rm -f libdwfl.a
-	$(libdwfl_a_AR) libdwfl.a $(libdwfl_a_OBJECTS) $(libdwfl_a_LIBADD)
-	$(RANLIB) libdwfl.a
-libdwfl_pic.a: $(libdwfl_pic_a_OBJECTS) $(libdwfl_pic_a_DEPENDENCIES) 
-	-rm -f libdwfl_pic.a
-	$(libdwfl_pic_a_AR) libdwfl_pic.a $(libdwfl_pic_a_OBJECTS) $(libdwfl_pic_a_LIBADD)
-	$(RANLIB) libdwfl_pic.a
+
+libdwfl.a: $(libdwfl_a_OBJECTS) $(libdwfl_a_DEPENDENCIES) $(EXTRA_libdwfl_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libdwfl.a
+	$(AM_V_AR)$(libdwfl_a_AR) libdwfl.a $(libdwfl_a_OBJECTS) $(libdwfl_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libdwfl.a
+
+libdwfl_pic.a: $(libdwfl_pic_a_OBJECTS) $(libdwfl_pic_a_DEPENDENCIES) $(EXTRA_libdwfl_pic_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libdwfl_pic.a
+	$(AM_V_AR)$(libdwfl_pic_a_AR) libdwfl_pic.a $(libdwfl_pic_a_OBJECTS) $(libdwfl_pic_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libdwfl_pic.a
 
 mostlyclean-compile:
 	-rm -f *.$(OBJEXT)
@@ -385,6 +493,9 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_dwarf_line.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_end.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_error.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_frame.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_frame_pc.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_frame_regs.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_getdwarf.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_getmodules.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_getsrc.Po@am__quote@
@@ -418,13 +529,16 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dwfl_version.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/elf-from-memory.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/find-debuginfo.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/frame_unwind.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gzip.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/image-header.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libdwfl_crc32.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libdwfl_crc32_file.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lines.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/link_map.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/linux-core-attach.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/linux-kernel-modules.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/linux-pid-attach.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/linux-proc-maps.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lzma.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/offline.Po@am__quote@
@@ -433,22 +547,25 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/segment.Po@am__quote@
 
 .c.o:
-@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
-@am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
-@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
-@am__fastdepCC_FALSE@	$(COMPILE) -c $<
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ $<
 
 .c.obj:
-@am__fastdepCC_TRUE@	$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
-@am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
-@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
-@am__fastdepCC_FALSE@	$(COMPILE) -c `$(CYGPATH_W) '$<'`
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
 install-pkgincludeHEADERS: $(pkginclude_HEADERS)
 	@$(NORMAL_INSTALL)
-	test -z "$(pkgincludedir)" || $(MKDIR_P) "$(DESTDIR)$(pkgincludedir)"
 	@list='$(pkginclude_HEADERS)'; test -n "$(pkgincludedir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(pkgincludedir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(pkgincludedir)" || exit 1; \
+	fi; \
 	for p in $$list; do \
 	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
 	  echo "$$d$$p"; \
@@ -462,30 +579,17 @@ uninstall-pkgincludeHEADERS:
 	@$(NORMAL_UNINSTALL)
 	@list='$(pkginclude_HEADERS)'; test -n "$(pkgincludedir)" || list=; \
 	files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \
-	test -n "$$files" || exit 0; \
-	echo " ( cd '$(DESTDIR)$(pkgincludedir)' && rm -f" $$files ")"; \
-	cd "$(DESTDIR)$(pkgincludedir)" && rm -f $$files
-
-ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
-	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
-	unique=`for i in $$list; do \
-	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
-	  done | \
-	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
-	      END { if (nonempty) { for (i in files) print i; }; }'`; \
-	mkid -fID $$unique
-tags: TAGS
-
-TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
-		$(TAGS_FILES) $(LISP)
+	dir='$(DESTDIR)$(pkgincludedir)'; $(am__uninstall_files_from_dir)
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
 	set x; \
 	here=`pwd`; \
-	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
-	unique=`for i in $$list; do \
-	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
-	  done | \
-	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
-	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	$(am__define_uniq_tagged_files); \
 	shift; \
 	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
 	  test -n "$$unique" || unique=$$empty_fix; \
@@ -497,15 +601,11 @@ TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
 	      $$unique; \
 	  fi; \
 	fi
-ctags: CTAGS
-CTAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
-		$(TAGS_FILES) $(LISP)
-	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
-	unique=`for i in $$list; do \
-	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
-	  done | \
-	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
-	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
 	test -z "$(CTAGS_ARGS)$$unique" \
 	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
 	     $$unique
@@ -514,6 +614,21 @@ GTAGS:
 	here=`$(am__cd) $(top_builddir) && pwd` \
 	  && $(am__cd) $(top_srcdir) \
 	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
 
 distclean-tags:
 	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
@@ -565,10 +680,15 @@ install-am: all-am
 
 installcheck: installcheck-am
 install-strip:
-	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
-	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
-	  `test -z '$(STRIP)' || \
-	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
 mostlyclean-generic:
 
 clean-generic:
@@ -652,18 +772,19 @@ uninstall-am: uninstall-pkgincludeHEADERS
 
 .MAKE: install-am install-strip
 
-.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
-	clean-noinstLIBRARIES ctags distclean distclean-compile \
-	distclean-generic distclean-tags distdir dvi dvi-am html \
-	html-am info info-am install install-am install-data \
-	install-data-am install-dvi install-dvi-am install-exec \
-	install-exec-am install-html install-html-am install-info \
-	install-info-am install-man install-pdf install-pdf-am \
-	install-pkgincludeHEADERS install-ps install-ps-am \
-	install-strip installcheck installcheck-am installdirs \
-	maintainer-clean maintainer-clean-generic mostlyclean \
-	mostlyclean-compile mostlyclean-generic pdf pdf-am ps ps-am \
-	tags uninstall uninstall-am uninstall-pkgincludeHEADERS
+.PHONY: CTAGS GTAGS TAGS all all-am check check-am clean clean-generic \
+	clean-noinstLIBRARIES cscopelist-am ctags ctags-am distclean \
+	distclean-compile distclean-generic distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-pkgincludeHEADERS install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic pdf pdf-am \
+	ps ps-am tags tags-am uninstall uninstall-am \
+	uninstall-pkgincludeHEADERS
 
 
 %.os: %.c %.o
diff --git a/src/libdwfl/argp-std.c b/src/libdwfl/argp-std.c
index e598c6ef..42b7e783 100644
--- a/src/libdwfl/argp-std.c
+++ b/src/libdwfl/argp-std.c
@@ -1,51 +1,30 @@
 /* Standard argp argument parsers for tools using libdwfl.
-   Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2010, 2012 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <argp.h>
@@ -111,6 +90,16 @@ static const Dwfl_Callbacks kernel_callbacks =
     .section_address = INTUSE(dwfl_linux_kernel_module_section_address),
   };
 
+/* Structure held at state->HOOK.  */
+struct parse_opt
+{
+  Dwfl *dwfl;
+  /* The -e|--executable parameter.  */
+  const char *e;
+  /* The --core parameter.  */
+  const char *core;
+};
+
 static error_t
 parse_opt (int key, char *arg, struct argp_state *state)
 {
@@ -132,152 +121,145 @@ parse_opt (int key, char *arg, struct argp_state *state)
 
   switch (key)
     {
+    case ARGP_KEY_INIT:
+      {
+	assert (state->hook == NULL);
+	struct parse_opt *opt = calloc (1, sizeof (*opt));
+	if (opt == NULL)
+	  failure (NULL, DWFL_E_ERRNO, "calloc");
+	state->hook = opt;
+      }
+      break;
+
     case OPT_DEBUGINFO:
       debuginfo_path = arg;
       break;
 
     case 'e':
       {
-	Dwfl *dwfl = state->hook;
+	struct parse_opt *opt = state->hook;
+	Dwfl *dwfl = opt->dwfl;
 	if (dwfl == NULL)
 	  {
 	    dwfl = INTUSE(dwfl_begin) (&offline_callbacks);
 	    if (dwfl == NULL)
 	      return fail (dwfl, -1, arg);
-	    state->hook = dwfl;
+	    opt->dwfl = dwfl;
 
 	    /* Start at zero so if there is just one -e foo.so,
 	       the DSO is shown without address bias.  */
 	    dwfl->offline_next_address = 0;
 	  }
-	if (dwfl->callbacks == &offline_callbacks)
-	  {
-	    if (INTUSE(dwfl_report_offline) (dwfl, "", arg, -1) == NULL)
-	      return fail (dwfl, -1, arg);
-	    state->hook = dwfl;
-	  }
-	else
+	if (dwfl->callbacks != &offline_callbacks)
 	  {
 	  toomany:
 	    argp_error (state, "%s",
 			_("only one of -e, -p, -k, -K, or --core allowed"));
 	    return EINVAL;
 	  }
+	opt->e = arg;
       }
       break;
 
     case 'p':
-      if (state->hook == NULL)
-	{
-	  Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks);
-	  int result = INTUSE(dwfl_linux_proc_report) (dwfl, atoi (arg));
-	  if (result != 0)
-	    return fail (dwfl, result, arg);
-	  state->hook = dwfl;
-	}
-      else
-	goto toomany;
+      {
+	struct parse_opt *opt = state->hook;
+	if (opt->dwfl == NULL)
+	  {
+	    Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks);
+	    int result = INTUSE(dwfl_linux_proc_report) (dwfl, atoi (arg));
+	    if (result != 0)
+	      return fail (dwfl, result, arg);
+
+	    /* Non-fatal to not be able to attach to process, ignore error.  */
+	    INTUSE(dwfl_linux_proc_attach) (dwfl, atoi (arg), false);
+
+	    opt->dwfl = dwfl;
+	  }
+	else
+	  goto toomany;
+      }
       break;
 
     case 'M':
-      if (state->hook == NULL)
-	{
-	  FILE *f = fopen (arg, "r");
-	  if (f == NULL)
-	  nofile:
-	    {
-	      int code = errno;
-	      argp_failure (state, EXIT_FAILURE, code,
-			    "cannot open '%s'", arg);
-	      return code;
-	    }
-	  Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks);
-	  int result = INTUSE(dwfl_linux_proc_maps_report) (dwfl, f);
-	  fclose (f);
-	  if (result != 0)
-	    return fail (dwfl, result, arg);
-	  state->hook = dwfl;
-	}
-      else
-	goto toomany;
+      {
+	struct parse_opt *opt = state->hook;
+	if (opt->dwfl == NULL)
+	  {
+	    FILE *f = fopen (arg, "r");
+	    if (f == NULL)
+	      {
+		int code = errno;
+		argp_failure (state, EXIT_FAILURE, code,
+			      "cannot open '%s'", arg);
+		return code;
+	      }
+	    Dwfl *dwfl = INTUSE(dwfl_begin) (&proc_callbacks);
+	    int result = INTUSE(dwfl_linux_proc_maps_report) (dwfl, f);
+	    fclose (f);
+	    if (result != 0)
+	      return fail (dwfl, result, arg);
+	    opt->dwfl = dwfl;
+	  }
+	else
+	  goto toomany;
+      }
       break;
 
     case OPT_COREFILE:
       {
-	Dwfl *dwfl = state->hook;
+	struct parse_opt *opt = state->hook;
+	Dwfl *dwfl = opt->dwfl;
 	if (dwfl == NULL)
-	  state->hook = dwfl = INTUSE(dwfl_begin) (&offline_callbacks);
+	  opt->dwfl = dwfl = INTUSE(dwfl_begin) (&offline_callbacks);
 	/* Permit -e and --core together.  */
 	else if (dwfl->callbacks != &offline_callbacks)
 	  goto toomany;
-
-	int fd = open64 (arg, O_RDONLY);
-	if (fd < 0)
-	  goto nofile;
-
-	Elf *core;
-	Dwfl_Error error = __libdw_open_file (&fd, &core, true, false);
-	if (error != DWFL_E_NOERROR)
-	  {
-	    argp_failure (state, EXIT_FAILURE, 0,
-			  _("cannot read ELF core file: %s"),
-			  INTUSE(dwfl_errmsg) (error));
-	    return error == DWFL_E_ERRNO ? errno : EIO;
-	  }
-
-	int result = INTUSE(dwfl_core_file_report) (dwfl, core);
-	if (result < 0)
-	  {
-	    elf_end (core);
-	    close (fd);
-	    return fail (dwfl, result, arg);
-	  }
-
-	/* From now we leak FD and CORE.  */
-
-	if (result == 0)
-	  {
-	    argp_failure (state, EXIT_FAILURE, 0,
-			  _("No modules recognized in core file"));
-	    return ENOENT;
-	  }
+	opt->core = arg;
       }
       break;
 
     case 'k':
-      if (state->hook == NULL)
-	{
-	  Dwfl *dwfl = INTUSE(dwfl_begin) (&kernel_callbacks);
-	  int result = INTUSE(dwfl_linux_kernel_report_kernel) (dwfl);
-	  if (result != 0)
-	    return fail (dwfl, result, _("cannot load kernel symbols"));
-	  result = INTUSE(dwfl_linux_kernel_report_modules) (dwfl);
-	  if (result != 0)
-	    /* Non-fatal to have no modules since we do have the kernel.  */
-	    failure (dwfl, result, _("cannot find kernel modules"));
-	  state->hook = dwfl;
-	}
-      else
-	goto toomany;
+      {
+	struct parse_opt *opt = state->hook;
+	if (opt->dwfl == NULL)
+	  {
+	    Dwfl *dwfl = INTUSE(dwfl_begin) (&kernel_callbacks);
+	    int result = INTUSE(dwfl_linux_kernel_report_kernel) (dwfl);
+	    if (result != 0)
+	      return fail (dwfl, result, _("cannot load kernel symbols"));
+	    result = INTUSE(dwfl_linux_kernel_report_modules) (dwfl);
+	    if (result != 0)
+	      /* Non-fatal to have no modules since we do have the kernel.  */
+	      failure (dwfl, result, _("cannot find kernel modules"));
+	    opt->dwfl = dwfl;
+	  }
+	else
+	  goto toomany;
+      }
       break;
 
     case 'K':
-      if (state->hook == NULL)
-	{
-	  Dwfl *dwfl = INTUSE(dwfl_begin) (&offline_callbacks);
-	  int result = INTUSE(dwfl_linux_kernel_report_offline) (dwfl, arg,
-								 NULL);
-	  if (result != 0)
-	    return fail (dwfl, result, _("cannot find kernel or modules"));
-	  state->hook = dwfl;
-	}
-      else
-	goto toomany;
+      {
+	struct parse_opt *opt = state->hook;
+	if (opt->dwfl == NULL)
+	  {
+	    Dwfl *dwfl = INTUSE(dwfl_begin) (&offline_callbacks);
+	    int result = INTUSE(dwfl_linux_kernel_report_offline) (dwfl, arg,
+								   NULL);
+	    if (result != 0)
+	      return fail (dwfl, result, _("cannot find kernel or modules"));
+	    opt->dwfl = dwfl;
+	  }
+	else
+	  goto toomany;
+      }
       break;
 
     case ARGP_KEY_SUCCESS:
       {
-	Dwfl *dwfl = state->hook;
+	struct parse_opt *opt = state->hook;
+	Dwfl *dwfl = opt->dwfl;
 
 	if (dwfl == NULL)
 	  {
@@ -286,7 +268,54 @@ parse_opt (int key, char *arg, struct argp_state *state)
 	    dwfl = INTUSE(dwfl_begin) (&offline_callbacks);
 	    if (INTUSE(dwfl_report_offline) (dwfl, "", arg, -1) == NULL)
 	      return fail (dwfl, -1, arg);
-	    state->hook = dwfl;
+	    opt->dwfl = dwfl;
+	  }
+
+	if (opt->core)
+	  {
+	    int fd = open64 (opt->core, O_RDONLY);
+	    if (fd < 0)
+	      {
+		int code = errno;
+		argp_failure (state, EXIT_FAILURE, code,
+			      "cannot open '%s'", opt->core);
+		return code;
+	      }
+
+	    Elf *core;
+	    Dwfl_Error error = __libdw_open_file (&fd, &core, true, false);
+	    if (error != DWFL_E_NOERROR)
+	      {
+		argp_failure (state, EXIT_FAILURE, 0,
+			      _("cannot read ELF core file: %s"),
+			      INTUSE(dwfl_errmsg) (error));
+		return error == DWFL_E_ERRNO ? errno : EIO;
+	      }
+
+	    int result = INTUSE(dwfl_core_file_report) (dwfl, core, opt->e);
+	    if (result < 0)
+	      {
+		elf_end (core);
+		close (fd);
+		return fail (dwfl, result, opt->core);
+	      }
+
+	    /* Non-fatal to not be able to attach to core, ignore error.  */
+	    INTUSE(dwfl_core_file_attach) (dwfl, core);
+
+	    /* From now we leak FD and CORE.  */
+
+	    if (result == 0)
+	      {
+		argp_failure (state, EXIT_FAILURE, 0,
+			      _("No modules recognized in core file"));
+		return ENOENT;
+	      }
+	  }
+	else if (opt->e)
+	  {
+	    if (INTUSE(dwfl_report_offline) (dwfl, "", opt->e, -1) == NULL)
+	      return fail (dwfl, -1, opt->e);
 	  }
 
 	/* One of the three flavors has done dwfl_begin and some reporting
@@ -295,12 +324,22 @@ parse_opt (int key, char *arg, struct argp_state *state)
 
 	int result = INTUSE(dwfl_report_end) (dwfl, NULL, NULL);
 	assert (result == 0);
+
+	/* Update the input all along, so a parent parser can see it.
+	   As we free OPT the update below will be no longer active.  */
+	*(Dwfl **) state->input = dwfl;
+	free (opt);
+	state->hook = NULL;
       }
       break;
 
     case ARGP_KEY_ERROR:
-      dwfl_end (state->hook);
-      state->hook = NULL;
+      {
+	struct parse_opt *opt = state->hook;
+	dwfl_end (opt->dwfl);
+	free (opt);
+	state->hook = NULL;
+      }
       break;
 
     default:
@@ -308,7 +347,10 @@ parse_opt (int key, char *arg, struct argp_state *state)
     }
 
   /* Update the input all along, so a parent parser can see it.  */
-  *(Dwfl **) state->input = state->hook;
+  struct parse_opt *opt = state->hook;
+  if (opt)
+    *(Dwfl **) state->input = opt->dwfl;
+
   return 0;
 }
 
@@ -320,15 +362,3 @@ dwfl_standard_argp (void)
 {
   return &libdwfl_argp;
 }
-
-#ifdef _MUDFLAP
-/* In the absence of a mudflap wrapper for argp_parse, or a libc compiled
-   with -fmudflap, we'll see spurious errors for using the struct argp_state
-   on argp_parse's stack.  */
-
-void __attribute__ ((constructor))
-__libdwfl_argp_mudflap_options (void)
-{
-  __mf_set_options ("-heur-stack-bound");
-}
-#endif
diff --git a/src/libdwfl/core-file.c b/src/libdwfl/core-file.c
index 1b556dde..50031aed 100644
--- a/src/libdwfl/core-file.c
+++ b/src/libdwfl/core-file.c
@@ -1,51 +1,30 @@
 /* Core file handling.
-   Copyright (C) 2008-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2008-2010, 2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 #include "../libelf/libelfP.h"	/* For NOTE_ALIGN.  */
@@ -402,8 +381,46 @@ dwfl_elf_phdr_memory_callback (Dwfl *dwfl, int ndx,
   return true;
 }
 
+/* Free the contents of R_DEBUG_INFO without the R_DEBUG_INFO memory itself.  */
+
+static void
+clear_r_debug_info (struct r_debug_info *r_debug_info)
+{
+  while (r_debug_info->module != NULL)
+    {
+      struct r_debug_info_module *module = r_debug_info->module;
+      r_debug_info->module = module->next;
+      elf_end (module->elf);
+      if (module->fd != -1)
+	close (module->fd);
+      free (module);
+    }
+}
+
+bool
+internal_function
+__libdwfl_dynamic_vaddr_get (Elf *elf, GElf_Addr *vaddrp)
+{
+  size_t phnum;
+  if (unlikely (elf_getphdrnum (elf, &phnum) != 0))
+    return false;
+  for (size_t i = 0; i < phnum; ++i)
+    {
+      GElf_Phdr phdr_mem;
+      GElf_Phdr *phdr = gelf_getphdr (elf, i, &phdr_mem);
+      if (unlikely (phdr == NULL))
+	return false;
+      if (phdr->p_type == PT_DYNAMIC)
+	{
+	  *vaddrp = phdr->p_vaddr;
+	  return true;
+	}
+    }
+  return false;
+}
+
 int
-dwfl_core_file_report (Dwfl *dwfl, Elf *elf)
+dwfl_core_file_report (Dwfl *dwfl, Elf *elf, const char *executable)
 {
   size_t phnum;
   if (unlikely (elf_getphdrnum (elf, &phnum) != 0))
@@ -412,36 +429,31 @@ dwfl_core_file_report (Dwfl *dwfl, Elf *elf)
       return -1;
     }
 
+  free (dwfl->executable_for_core);
+  if (executable == NULL)
+    dwfl->executable_for_core = NULL;
+  else
+    {
+      dwfl->executable_for_core = strdup (executable);
+      if (dwfl->executable_for_core == NULL)
+	{
+	  __libdwfl_seterrno (DWFL_E_NOMEM);
+	  return -1;
+	}
+    }
+
   /* First report each PT_LOAD segment.  */
   GElf_Phdr notes_phdr;
   int ndx = dwfl_report_core_segments (dwfl, elf, phnum, &notes_phdr);
   if (unlikely (ndx <= 0))
     return ndx;
 
-  /* Now sniff segment contents for modules.  */
-  int sniffed = 0;
-  ndx = 0;
-  do
-    {
-      int seg = dwfl_segment_report_module (dwfl, ndx, NULL,
-					    &dwfl_elf_phdr_memory_callback, elf,
-					    core_file_read_eagerly, elf);
-      if (unlikely (seg < 0))
-	return seg;
-      if (seg > ndx)
-	{
-	  ndx = seg;
-	  ++sniffed;
-	}
-      else
-	++ndx;
-    }
-  while (ndx < (int) phnum);
-
   /* Next, we should follow the chain from DT_DEBUG.  */
 
   const void *auxv = NULL;
+  const void *note_file = NULL;
   size_t auxv_size = 0;
+  size_t note_file_size = 0;
   if (likely (notes_phdr.p_type == PT_NOTE))
     {
       /* PT_NOTE -> NT_AUXV -> AT_PHDR -> PT_DYNAMIC -> DT_DEBUG */
@@ -458,13 +470,19 @@ dwfl_core_file_report (Dwfl *dwfl, Elf *elf)
 	  size_t desc_pos;
 	  while ((pos = gelf_getnote (notes, pos, &nhdr,
 				      &name_pos, &desc_pos)) > 0)
-	    if (nhdr.n_type == NT_AUXV
-		&& nhdr.n_namesz == sizeof "CORE"
+	    if (nhdr.n_namesz == sizeof "CORE"
 		&& !memcmp (notes->d_buf + name_pos, "CORE", sizeof "CORE"))
 	      {
-		auxv = notes->d_buf + desc_pos;
-		auxv_size = nhdr.n_descsz;
-		break;
+		if (nhdr.n_type == NT_AUXV)
+		  {
+		    auxv = notes->d_buf + desc_pos;
+		    auxv_size = nhdr.n_descsz;
+		  }
+		if (nhdr.n_type == NT_FILE)
+		  {
+		    note_file = notes->d_buf + desc_pos;
+		    note_file_size = nhdr.n_descsz;
+		  }
 	      }
 	}
     }
@@ -472,13 +490,100 @@ dwfl_core_file_report (Dwfl *dwfl, Elf *elf)
   /* Now we have NT_AUXV contents.  From here on this processing could be
      used for a live process with auxv read from /proc.  */
 
-  int listed = dwfl_link_map_report (dwfl, auxv, auxv_size,
-				     dwfl_elf_phdr_memory_callback, elf);
+  struct r_debug_info r_debug_info;
+  memset (&r_debug_info, 0, sizeof r_debug_info);
+  int retval = dwfl_link_map_report (dwfl, auxv, auxv_size,
+				     dwfl_elf_phdr_memory_callback, elf,
+				     &r_debug_info);
+  int listed = retval > 0 ? retval : 0;
+
+  /* Now sniff segment contents for modules hinted by information gathered
+     from DT_DEBUG.  */
+
+  ndx = 0;
+  do
+    {
+      int seg = dwfl_segment_report_module (dwfl, ndx, NULL,
+					    &dwfl_elf_phdr_memory_callback, elf,
+					    core_file_read_eagerly, elf,
+					    note_file, note_file_size,
+					    &r_debug_info);
+      if (unlikely (seg < 0))
+	{
+	  clear_r_debug_info (&r_debug_info);
+	  return seg;
+	}
+      if (seg > ndx)
+	{
+	  ndx = seg;
+	  ++listed;
+	}
+      else
+	++ndx;
+    }
+  while (ndx < (int) phnum);
+
+  /* Now report the modules from dwfl_link_map_report which were not filtered
+     out by dwfl_segment_report_module.  */
+
+  Dwfl_Module **lastmodp = &dwfl->modulelist;
+  while (*lastmodp != NULL)
+    lastmodp = &(*lastmodp)->next;
+  for (struct r_debug_info_module *module = r_debug_info.module;
+       module != NULL; module = module->next)
+    {
+      if (module->elf == NULL)
+	continue;
+      GElf_Addr file_dynamic_vaddr;
+      if (! __libdwfl_dynamic_vaddr_get (module->elf, &file_dynamic_vaddr))
+	continue;
+      Dwfl_Module *mod;
+      mod = __libdwfl_report_elf (dwfl, basename (module->name), module->name,
+				  module->fd, module->elf,
+				  module->l_ld - file_dynamic_vaddr,
+				  true, true);
+      if (mod == NULL)
+	continue;
+      ++listed;
+      module->elf = NULL;
+      module->fd = -1;
+      /* Move this module to the end of the list, so that we end
+	 up with a list in the same order as the link_map chain.  */
+      if (mod->next != NULL)
+	{
+	  if (*lastmodp != mod)
+	    {
+	      lastmodp = &dwfl->modulelist;
+	      while (*lastmodp != mod)
+		lastmodp = &(*lastmodp)->next;
+	    }
+	  *lastmodp = mod->next;
+	  mod->next = NULL;
+	  while (*lastmodp != NULL)
+	    lastmodp = &(*lastmodp)->next;
+	  *lastmodp = mod;
+	}
+      lastmodp = &mod->next;
+    }
+
+  clear_r_debug_info (&r_debug_info);
 
   /* We return the number of modules we found if we found any.
      If we found none, we return -1 instead of 0 if there was an
-     error rather than just nothing found.  If link_map handling
-     failed, we still have the sniffed modules.  */
-  return sniffed == 0 || listed > sniffed ? listed : sniffed;
+     error rather than just nothing found.  */
+  return listed > 0 ? listed : retval;
 }
 INTDEF (dwfl_core_file_report)
+NEW_VERSION (dwfl_core_file_report, ELFUTILS_0.158)
+
+#ifdef SHARED
+int _compat_without_executable_dwfl_core_file_report (Dwfl *dwfl, Elf *elf);
+COMPAT_VERSION_NEWPROTO (dwfl_core_file_report, ELFUTILS_0.146,
+			 without_executable)
+
+int
+_compat_without_executable_dwfl_core_file_report (Dwfl *dwfl, Elf *elf)
+{
+  return dwfl_core_file_report (dwfl, elf, NULL);
+}
+#endif
diff --git a/src/libdwfl/cu.c b/src/libdwfl/cu.c
index 515aff3b..5ce531bd 100644
--- a/src/libdwfl/cu.c
+++ b/src/libdwfl/cu.c
@@ -1,51 +1,30 @@
 /* Keeping track of DWARF compilation units in libdwfl.
    Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/libdwP.h"
@@ -172,14 +151,20 @@ less_lazy (Dwfl_Module *mod)
 static inline Dwarf_Off
 cudie_offset (const struct dwfl_cu *cu)
 {
+  /* These are real CUs, so there never is a type_sig8.  Note
+     initialization of dwkey.start and offset_size in intern_cu ()
+     to see why this calculates the same value for both key and
+     die.cu search items.  */
   return DIE_OFFSET_FROM_CU_OFFSET (cu->die.cu->start, cu->die.cu->offset_size,
-				    cu->die.cu->type_sig8 != 0);
+				    0);
 }
 
 static int
 compare_cukey (const void *a, const void *b)
 {
-  return cudie_offset (a) - cudie_offset (b);
+  Dwarf_Off a_off = cudie_offset (a);
+  Dwarf_Off b_off = cudie_offset (b);
+  return (a_off < b_off) ? -1 : ((a_off > b_off) ? 1 : 0);
 }
 
 /* Intern the CU if necessary.  */
@@ -221,7 +206,10 @@ intern_cu (Dwfl_Module *mod, Dwarf_Off cuoff, struct dwfl_cu **result)
 	  /* XXX use non-searching lookup */
 	  Dwarf_Die *die = INTUSE(dwarf_offdie) (mod->dw, cuoff, &cu->die);
 	  if (die == NULL)
-	    return DWFL_E_LIBDW;
+	    {
+	      free (cu);
+	      return DWFL_E_LIBDW;
+	    }
 	  assert (die == &cu->die);
 
 	  struct dwfl_cu **newvec = realloc (mod->cu, ((mod->ncu + 1)
diff --git a/src/libdwfl/derelocate.c b/src/libdwfl/derelocate.c
index b8c8dd73..da679089 100644
--- a/src/libdwfl/derelocate.c
+++ b/src/libdwfl/derelocate.c
@@ -1,51 +1,30 @@
 /* Recover relocatibility for addresses computed from debug information.
-   Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2010, 2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
@@ -338,7 +317,7 @@ find_section (Dwfl_Module *mod, Dwarf_Addr *addr)
 	     inside the next one.  A section limit address can appear in
 	     line records.  */
 	  if (*addr == sections->refs[idx].end
-	      && idx < sections->count
+	      && idx + 1 < sections->count
 	      && *addr == sections->refs[idx + 1].start)
 	    ++idx;
 
@@ -351,6 +330,17 @@ find_section (Dwfl_Module *mod, Dwarf_Addr *addr)
   return -1;
 }
 
+size_t
+internal_function
+__libdwfl_find_section_ndx (Dwfl_Module *mod, Dwarf_Addr *addr)
+{
+  int idx = find_section (mod, addr);
+  if (unlikely (idx == -1))
+    return SHN_UNDEF;
+
+  return elf_ndxscn (mod->reloc_info->refs[idx].scn);
+}
+
 int
 dwfl_module_relocate_address (Dwfl_Module *mod, Dwarf_Addr *addr)
 {
diff --git a/src/libdwfl/dwfl_addrdie.c b/src/libdwfl/dwfl_addrdie.c
index 20c15783..1e9b3ab6 100644
--- a/src/libdwfl/dwfl_addrdie.c
+++ b/src/libdwfl/dwfl_addrdie.c
@@ -1,51 +1,30 @@
 /* Fetch CU DIE from address.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_addrdwarf.c b/src/libdwfl/dwfl_addrdwarf.c
index 365c69c5..ba412eca 100644
--- a/src/libdwfl/dwfl_addrdwarf.c
+++ b/src/libdwfl/dwfl_addrdwarf.c
@@ -1,51 +1,30 @@
 /* Fetch libdw handle from address.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_addrmodule.c b/src/libdwfl/dwfl_addrmodule.c
index 64559436..9234eb71 100644
--- a/src/libdwfl/dwfl_addrmodule.c
+++ b/src/libdwfl/dwfl_addrmodule.c
@@ -1,51 +1,30 @@
 /* Find module containing address.
    Copyright (C) 2005, 2006, 2007, 2008 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_begin.c b/src/libdwfl/dwfl_begin.c
index d388ee00..44c16a92 100644
--- a/src/libdwfl/dwfl_begin.c
+++ b/src/libdwfl/dwfl_begin.c
@@ -1,51 +1,30 @@
 /* Set up a session using libdwfl.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_build_id_find_debuginfo.c b/src/libdwfl/dwfl_build_id_find_debuginfo.c
index e51b65b1..f1c64bcd 100644
--- a/src/libdwfl/dwfl_build_id_find_debuginfo.c
+++ b/src/libdwfl/dwfl_build_id_find_debuginfo.c
@@ -1,51 +1,30 @@
 /* Find the debuginfo file for a module from its build ID.
-   Copyright (C) 2007, 2009 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2007, 2009, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <unistd.h>
@@ -62,10 +41,61 @@ dwfl_build_id_find_debuginfo (Dwfl_Module *mod,
 			      char **debuginfo_file_name)
 {
   int fd = -1;
+
+  /* Are we looking for a separate debug file for the main file or for
+     an alternate (dwz multi) debug file?  Alternatively we could check
+     whether the dwbias == -1.  */
+  if (mod->dw != NULL)
+    {
+      const void *build_id;
+      const char *altname;
+      ssize_t build_id_len = INTUSE(dwelf_dwarf_gnu_debugaltlink) (mod->dw,
+								   &altname,
+								   &build_id);
+      if (build_id_len > 0)
+	fd = __libdwfl_open_by_build_id (mod, true, debuginfo_file_name,
+					 build_id_len, build_id);
+
+      if (fd >= 0)
+	{
+	  /* We need to open an Elf handle on the file so we can check its
+	     build ID note for validation.  Backdoor the handle into the
+	     module data structure since we had to open it early anyway.  */
+	  Dwfl_Error error = __libdw_open_file (&fd, &mod->alt_elf,
+						true, false);
+	  if (error != DWFL_E_NOERROR)
+	    __libdwfl_seterrno (error);
+	  else
+	    {
+	      const void *alt_build_id;
+	      ssize_t alt_len = INTUSE(dwelf_elf_gnu_build_id) (mod->alt_elf,
+								&alt_build_id);
+	      if (alt_len > 0 && alt_len == build_id_len
+		  && memcmp (build_id, alt_build_id, alt_len) == 0)
+		return fd;
+	      else
+		{
+		  /* A mismatch!  */
+		  elf_end (mod->alt_elf);
+		  mod->alt_elf = NULL;
+		  close (fd);
+		  fd = -1;
+		}
+	      free (*debuginfo_file_name);
+	      *debuginfo_file_name = NULL;
+	      errno = 0;
+	    }
+	}
+      return fd;
+    }
+
+  /* We don't even have the Dwarf yet and it isn't in the main file.
+     Try to find separate debug file now using the module build id.  */
   const unsigned char *bits;
   GElf_Addr vaddr;
+
   if (INTUSE(dwfl_module_build_id) (mod, &bits, &vaddr) > 0)
-    fd = __libdwfl_open_by_build_id (mod, true, debuginfo_file_name);
+    fd = __libdwfl_open_mod_by_build_id (mod, true, debuginfo_file_name);
   if (fd >= 0)
     {
       /* We need to open an Elf handle on the file so we can check its
diff --git a/src/libdwfl/dwfl_build_id_find_elf.c b/src/libdwfl/dwfl_build_id_find_elf.c
index 12ce1b58..062aad1f 100644
--- a/src/libdwfl/dwfl_build_id_find_elf.c
+++ b/src/libdwfl/dwfl_build_id_find_elf.c
@@ -1,51 +1,30 @@
 /* Find an ELF file for a module from its build ID.
-   Copyright (C) 2007-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2007-2010, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <inttypes.h>
@@ -55,17 +34,9 @@
 
 int
 internal_function
-__libdwfl_open_by_build_id (Dwfl_Module *mod, bool debug, char **file_name)
+__libdwfl_open_by_build_id (Dwfl_Module *mod, bool debug, char **file_name,
+			    const size_t id_len, const uint8_t *id)
 {
-  /* If *FILE_NAME was primed into the module, leave it there
-     as the fallback when we have nothing to offer.  */
-  errno = 0;
-  if (mod->build_id_len <= 0)
-    return -1;
-
-  const size_t id_len = mod->build_id_len;
-  const uint8_t *id = mod->build_id_bits;
-
   /* Search debuginfo_path directories' .build-id/ subdirectories.  */
 
   char id_name[sizeof "/.build-id/" + 1 + id_len * 2 + sizeof ".debug" - 1];
@@ -84,13 +55,8 @@ __libdwfl_open_by_build_id (Dwfl_Module *mod, bool debug, char **file_name)
 	    ".debug");
 
   const Dwfl_Callbacks *const cb = mod->dwfl->callbacks;
-#if defined(__BIONIC__) || defined(__APPLE__)
-  char *path = strdup ((cb->debuginfo_path ? *cb->debuginfo_path : NULL)
-			?: DEFAULT_DEBUGINFO_PATH);
-#else
   char *path = strdupa ((cb->debuginfo_path ? *cb->debuginfo_path : NULL)
 			?: DEFAULT_DEBUGINFO_PATH);
-#endif
 
   int fd = -1;
   char *dir;
@@ -124,10 +90,6 @@ __libdwfl_open_by_build_id (Dwfl_Module *mod, bool debug, char **file_name)
       free (name);
     }
 
-#if defined(__BIONIC__) || defined(__APPLE__)
-    free(path);
-#endif
-
   /* If we simply found nothing, clear errno.  If we had some other error
      with the file, report that.  Possibly this should treat other errors
      like ENOENT too.  But ignoring all errors could mask some that should
@@ -139,6 +101,22 @@ __libdwfl_open_by_build_id (Dwfl_Module *mod, bool debug, char **file_name)
 }
 
 int
+internal_function
+__libdwfl_open_mod_by_build_id (Dwfl_Module *mod, bool debug, char **file_name)
+{
+  /* If *FILE_NAME was primed into the module, leave it there
+     as the fallback when we have nothing to offer.  */
+  errno = 0;
+  if (mod->build_id_len <= 0)
+    return -1;
+
+  const size_t id_len = mod->build_id_len;
+  const uint8_t *id = mod->build_id_bits;
+
+  return __libdwfl_open_by_build_id (mod, debug, file_name, id_len, id);
+}
+
+int
 dwfl_build_id_find_elf (Dwfl_Module *mod,
 			void **userdata __attribute__ ((unused)),
 			const char *modname __attribute__ ((unused)),
@@ -146,7 +124,23 @@ dwfl_build_id_find_elf (Dwfl_Module *mod,
 			char **file_name, Elf **elfp)
 {
   *elfp = NULL;
-  int fd = __libdwfl_open_by_build_id (mod, false, file_name);
+  if (mod->is_executable && mod->dwfl->executable_for_core != NULL)
+    {
+      /* When dwfl_core_file_report was called with a non-NULL executable file
+	 name this callback will replace the Dwfl_Module main.name with the
+	 recorded executable file when MOD was identified as main executable
+	 (which then triggers opening and reporting of the executable).  */
+      int fd = open64 (mod->dwfl->executable_for_core, O_RDONLY);
+      if (fd >= 0)
+	{
+	  *file_name = strdup (mod->dwfl->executable_for_core);
+	  if (*file_name != NULL)
+	    return fd;
+	  else
+	    close (fd);
+	}
+    }
+  int fd = __libdwfl_open_mod_by_build_id (mod, false, file_name);
   if (fd >= 0)
     {
       Dwfl_Error error = __libdw_open_file (&fd, elfp, true, false);
diff --git a/src/libdwfl/dwfl_cumodule.c b/src/libdwfl/dwfl_cumodule.c
index 787c098f..c5cf004d 100644
--- a/src/libdwfl/dwfl_cumodule.c
+++ b/src/libdwfl/dwfl_cumodule.c
@@ -1,51 +1,30 @@
 /* Find the module for a CU DIE previously returned by libdwfl.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_dwarf_line.c b/src/libdwfl/dwfl_dwarf_line.c
index eb085e4a..e96f859a 100644
--- a/src/libdwfl/dwfl_dwarf_line.c
+++ b/src/libdwfl/dwfl_dwarf_line.c
@@ -1,51 +1,30 @@
 /* Get information from a source line record returned by libdwfl.
    Copyright (C) 2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/libdwP.h"
diff --git a/src/libdwfl/dwfl_end.c b/src/libdwfl/dwfl_end.c
index 429abb13..33cae48c 100644
--- a/src/libdwfl/dwfl_end.c
+++ b/src/libdwfl/dwfl_end.c
@@ -1,51 +1,30 @@
 /* Finish a session using libdwfl.
-   Copyright (C) 2005, 2008 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005, 2008, 2012-2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
@@ -55,6 +34,9 @@ dwfl_end (Dwfl *dwfl)
   if (dwfl == NULL)
     return;
 
+  if (dwfl->process)
+    __libdwfl_process_free (dwfl->process);
+
   free (dwfl->lookup_addr);
   free (dwfl->lookup_module);
   free (dwfl->lookup_segndx);
@@ -67,5 +49,6 @@ dwfl_end (Dwfl *dwfl)
       __libdwfl_module_free (dead);
     }
 
+  free (dwfl->executable_for_core);
   free (dwfl);
 }
diff --git a/src/libdwfl/dwfl_error.c b/src/libdwfl/dwfl_error.c
index 966c9901..d9ca9e7e 100644
--- a/src/libdwfl/dwfl_error.c
+++ b/src/libdwfl/dwfl_error.c
@@ -1,51 +1,30 @@
 /* Error handling in libdwfl.
    Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #ifdef HAVE_CONFIG_H
 # include <config.h>
@@ -62,11 +41,7 @@
 
 
 /* The error number.  */
-#ifdef __APPLE__
-static int global_error;
-#else
 static __thread int global_error;
-#endif
 
 
 int
@@ -167,12 +142,7 @@ dwfl_errmsg (error)
   switch (error &~ 0xffff)
     {
     case OTHER_ERROR (ERRNO):
-#ifdef __BIONIC__
-      strerror_r (error & 0xffff, "bad", 0);
-      return "bad";
-#else
       return strerror_r (error & 0xffff, "bad", 0);
-#endif
     case OTHER_ERROR (LIBELF):
       return elf_errmsg (error & 0xffff);
     case OTHER_ERROR (LIBDW):
diff --git a/src/libdwfl/dwfl_frame.c b/src/libdwfl/dwfl_frame.c
new file mode 100644
index 00000000..f6f86c0d
--- /dev/null
+++ b/src/libdwfl/dwfl_frame.c
@@ -0,0 +1,474 @@
+/* Get Dwarf Frame state for target PID or core file.
+   Copyright (C) 2013, 2014 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include "libdwflP.h"
+#include <sys/ptrace.h>
+#include <unistd.h>
+
+/* Set STATE->pc_set from STATE->regs according to the backend.  Return true on
+   success, false on error.  */
+static bool
+state_fetch_pc (Dwfl_Frame *state)
+{
+  switch (state->pc_state)
+    {
+    case DWFL_FRAME_STATE_PC_SET:
+      return true;
+    case DWFL_FRAME_STATE_PC_UNDEFINED:
+      abort ();
+    case DWFL_FRAME_STATE_ERROR:
+      {
+	Ebl *ebl = state->thread->process->ebl;
+	Dwarf_CIE abi_info;
+	if (ebl_abi_cfi (ebl, &abi_info) != 0)
+	  {
+	    __libdwfl_seterrno (DWFL_E_LIBEBL);
+	    return false;
+	  }
+	unsigned ra = abi_info.return_address_register;
+	/* dwarf_frame_state_reg_is_set is not applied here.  */
+	if (ra >= ebl_frame_nregs (ebl))
+	  {
+	    __libdwfl_seterrno (DWFL_E_LIBEBL_BAD);
+	    return false;
+	  }
+	state->pc = state->regs[ra];
+	state->pc_state = DWFL_FRAME_STATE_PC_SET;
+      }
+      return true;
+    }
+  abort ();
+}
+
+/* Do not call it on your own, to be used by thread_* functions only.  */
+
+static void
+state_free (Dwfl_Frame *state)
+{
+  Dwfl_Thread *thread = state->thread;
+  assert (thread->unwound == state);
+  thread->unwound = state->unwound;
+  free (state);
+}
+
+static void
+thread_free_all_states (Dwfl_Thread *thread)
+{
+  while (thread->unwound)
+    state_free (thread->unwound);
+}
+
+static Dwfl_Frame *
+state_alloc (Dwfl_Thread *thread)
+{
+  assert (thread->unwound == NULL);
+  Ebl *ebl = thread->process->ebl;
+  size_t nregs = ebl_frame_nregs (ebl);
+  if (nregs == 0)
+    return NULL;
+  assert (nregs < sizeof (((Dwfl_Frame *) NULL)->regs_set) * 8);
+  Dwfl_Frame *state = malloc (sizeof (*state) + sizeof (*state->regs) * nregs);
+  if (state == NULL)
+    return NULL;
+  state->thread = thread;
+  state->signal_frame = false;
+  state->initial_frame = true;
+  state->pc_state = DWFL_FRAME_STATE_ERROR;
+  memset (state->regs_set, 0, sizeof (state->regs_set));
+  thread->unwound = state;
+  state->unwound = NULL;
+  return state;
+}
+
+void
+internal_function
+__libdwfl_process_free (Dwfl_Process *process)
+{
+  Dwfl *dwfl = process->dwfl;
+  if (process->callbacks->detach != NULL)
+    process->callbacks->detach (dwfl, process->callbacks_arg);
+  assert (dwfl->process == process);
+  dwfl->process = NULL;
+  if (process->ebl_close)
+    ebl_closebackend (process->ebl);
+  free (process);
+  dwfl->attacherr = DWFL_E_NOERROR;
+}
+
+/* Allocate new Dwfl_Process for DWFL.  */
+static void
+process_alloc (Dwfl *dwfl)
+{
+  Dwfl_Process *process = malloc (sizeof (*process));
+  if (process == NULL)
+    return;
+  process->dwfl = dwfl;
+  dwfl->process = process;
+}
+
+bool
+dwfl_attach_state (Dwfl *dwfl, Elf *elf, pid_t pid,
+		   const Dwfl_Thread_Callbacks *thread_callbacks, void *arg)
+{
+  if (dwfl->process != NULL)
+    {
+      __libdwfl_seterrno (DWFL_E_ATTACH_STATE_CONFLICT);
+      return false;
+    }
+
+  /* Reset any previous error, we are just going to try again.  */
+  dwfl->attacherr = DWFL_E_NOERROR;
+  if (thread_callbacks == NULL || thread_callbacks->next_thread == NULL
+      || thread_callbacks->set_initial_registers == NULL)
+    {
+      dwfl->attacherr = DWFL_E_INVALID_ARGUMENT;
+    fail:
+      dwfl->attacherr = __libdwfl_canon_error (dwfl->attacherr);
+      __libdwfl_seterrno (dwfl->attacherr);
+      return false;
+    }
+
+  Ebl *ebl;
+  bool ebl_close;
+  if (elf != NULL)
+    {
+      ebl = ebl_openbackend (elf);
+      ebl_close = true;
+    }
+  else
+    {
+      ebl = NULL;
+      for (Dwfl_Module *mod = dwfl->modulelist; mod != NULL; mod = mod->next)
+	{
+	  /* Reading of the vDSO or (deleted) modules may fail as
+	     /proc/PID/mem is unreadable without PTRACE_ATTACH and
+	     we may not be PTRACE_ATTACH-ed now.  MOD would not be
+	     re-read later to unwind it when we are already
+	     PTRACE_ATTACH-ed to PID.  This happens when this function
+	     is called from dwfl_linux_proc_attach with elf == NULL.
+	     __libdwfl_module_getebl will call __libdwfl_getelf which
+	     will call the find_elf callback.  */
+	  if (strncmp (mod->name, "[vdso: ", 7) == 0
+	      || strcmp (strrchr (mod->name, ' ') ?: "",
+			 " (deleted)") == 0)
+	    continue;
+	  Dwfl_Error error = __libdwfl_module_getebl (mod);
+	  if (error != DWFL_E_NOERROR)
+	    continue;
+	  ebl = mod->ebl;
+	  break;
+	}
+      ebl_close = false;
+    }
+  if (ebl == NULL)
+    {
+      /* Not identified EBL from any of the modules.  */
+      dwfl->attacherr = DWFL_E_PROCESS_NO_ARCH;
+      goto fail;
+    }
+  process_alloc (dwfl);
+  Dwfl_Process *process = dwfl->process;
+  if (process == NULL)
+    {
+      if (ebl_close)
+	ebl_closebackend (ebl);
+      dwfl->attacherr = DWFL_E_NOMEM;
+      goto fail;
+    }
+  process->ebl = ebl;
+  process->ebl_close = ebl_close;
+  process->pid = pid;
+  process->callbacks = thread_callbacks;
+  process->callbacks_arg = arg;
+  return true;
+}
+INTDEF(dwfl_attach_state)
+
+pid_t
+dwfl_pid (Dwfl *dwfl)
+{
+  if (dwfl->attacherr != DWFL_E_NOERROR)
+    {
+      __libdwfl_seterrno (dwfl->attacherr);
+      return -1;
+    }
+
+  if (dwfl->process == NULL)
+    {
+      __libdwfl_seterrno (DWFL_E_NO_ATTACH_STATE);
+      return -1;
+    }
+  return dwfl->process->pid;
+}
+INTDEF(dwfl_pid)
+
+Dwfl *
+dwfl_thread_dwfl (Dwfl_Thread *thread)
+{
+  return thread->process->dwfl;
+}
+INTDEF(dwfl_thread_dwfl)
+
+pid_t
+dwfl_thread_tid (Dwfl_Thread *thread)
+{
+  return thread->tid;
+}
+INTDEF(dwfl_thread_tid)
+
+Dwfl_Thread *
+dwfl_frame_thread (Dwfl_Frame *state)
+{
+  return state->thread;
+}
+INTDEF(dwfl_frame_thread)
+
+int
+dwfl_getthreads (Dwfl *dwfl, int (*callback) (Dwfl_Thread *thread, void *arg),
+		 void *arg)
+{
+  if (dwfl->attacherr != DWFL_E_NOERROR)
+    {
+      __libdwfl_seterrno (dwfl->attacherr);
+      return -1;
+    }
+
+  Dwfl_Process *process = dwfl->process;
+  if (process == NULL)
+    {
+      __libdwfl_seterrno (DWFL_E_NO_ATTACH_STATE);
+      return -1;
+    }
+
+  Dwfl_Thread thread;
+  thread.process = process;
+  thread.unwound = NULL;
+  thread.callbacks_arg = NULL;
+  for (;;)
+    {
+      thread.tid = process->callbacks->next_thread (dwfl,
+						    process->callbacks_arg,
+						    &thread.callbacks_arg);
+      if (thread.tid < 0)
+	{
+	  Dwfl_Error saved_errno = dwfl_errno ();
+	  thread_free_all_states (&thread);
+	  __libdwfl_seterrno (saved_errno);
+	  return -1;
+	}
+      if (thread.tid == 0)
+	{
+	  thread_free_all_states (&thread);
+	  __libdwfl_seterrno (DWFL_E_NOERROR);
+	  return 0;
+	}
+      int err = callback (&thread, arg);
+      if (err != DWARF_CB_OK)
+	{
+	  thread_free_all_states (&thread);
+	  return err;
+	}
+      assert (thread.unwound == NULL);
+    }
+  /* NOTREACHED */
+}
+INTDEF(dwfl_getthreads)
+
+struct one_arg
+{
+  pid_t tid;
+  bool seen;
+  int (*callback) (Dwfl_Thread *thread, void *arg);
+  void *arg;
+  int ret;
+};
+
+static int
+get_one_thread_cb (Dwfl_Thread *thread, void *arg)
+{
+  struct one_arg *oa = (struct one_arg *) arg;
+  if (! oa->seen && INTUSE(dwfl_thread_tid) (thread) == oa->tid)
+    {
+      oa->seen = true;
+      oa->ret = oa->callback (thread, oa->arg);
+      return DWARF_CB_ABORT;
+    }
+
+  return DWARF_CB_OK;
+}
+
+/* Note not currently exported, will be when there are more Dwfl_Thread
+   properties to query.  Use dwfl_getthread_frames for now directly.  */
+static int
+getthread (Dwfl *dwfl, pid_t tid,
+	   int (*callback) (Dwfl_Thread *thread, void *arg),
+	   void *arg)
+{
+  if (dwfl->attacherr != DWFL_E_NOERROR)
+    {
+      __libdwfl_seterrno (dwfl->attacherr);
+      return -1;
+    }
+
+  Dwfl_Process *process = dwfl->process;
+  if (process == NULL)
+    {
+      __libdwfl_seterrno (DWFL_E_NO_ATTACH_STATE);
+      return -1;
+    }
+
+  if (process->callbacks->get_thread != NULL)
+    {
+      Dwfl_Thread thread;
+      thread.process = process;
+      thread.unwound = NULL;
+      thread.callbacks_arg = NULL;
+
+      if (process->callbacks->get_thread (dwfl, tid, process->callbacks_arg,
+					  &thread.callbacks_arg))
+	{
+	  int err;
+	  thread.tid = tid;
+	  err = callback (&thread, arg);
+	  thread_free_all_states (&thread);
+	  return err;
+	}
+
+      return -1;
+    }
+
+   struct one_arg oa = { .tid = tid, .callback = callback,
+			 .arg = arg, .seen = false };
+   int err = INTUSE(dwfl_getthreads) (dwfl, get_one_thread_cb, &oa);
+
+   if (err == DWARF_CB_ABORT && oa.seen)
+     return oa.ret;
+
+   if (err == DWARF_CB_OK && ! oa.seen)
+     {
+	errno = ESRCH;
+	__libdwfl_seterrno (DWFL_E_ERRNO);
+	return -1;
+     }
+
+   return err;
+}
+
+struct one_thread
+{
+  int (*callback) (Dwfl_Frame *frame, void *arg);
+  void *arg;
+};
+
+static int
+get_one_thread_frames_cb (Dwfl_Thread *thread, void *arg)
+{
+  struct one_thread *ot = (struct one_thread *) arg;
+  return INTUSE(dwfl_thread_getframes) (thread, ot->callback, ot->arg);
+}
+
+int
+dwfl_getthread_frames (Dwfl *dwfl, pid_t tid,
+		       int (*callback) (Dwfl_Frame *frame, void *arg),
+		       void *arg)
+{
+  struct one_thread ot = { .callback = callback, .arg = arg };
+  return getthread (dwfl, tid, get_one_thread_frames_cb, &ot);
+}
+INTDEF(dwfl_getthread_frames)
+
+int
+dwfl_thread_getframes (Dwfl_Thread *thread,
+		       int (*callback) (Dwfl_Frame *state, void *arg),
+		       void *arg)
+{
+  if (thread->unwound != NULL)
+    {
+      /* We had to be called from inside CALLBACK.  */
+      __libdwfl_seterrno (DWFL_E_ATTACH_STATE_CONFLICT);
+      return -1;
+    }
+  Ebl *ebl = thread->process->ebl;
+  if (ebl_frame_nregs (ebl) == 0)
+    {
+      __libdwfl_seterrno (DWFL_E_NO_UNWIND);
+      return -1;
+    }
+  if (state_alloc (thread) == NULL)
+    {
+      __libdwfl_seterrno (DWFL_E_NOMEM);
+      return -1;
+    }
+  Dwfl_Process *process = thread->process;
+  if (! process->callbacks->set_initial_registers (thread,
+						   thread->callbacks_arg))
+    {
+      thread_free_all_states (thread);
+      return -1;
+    }
+  if (! state_fetch_pc (thread->unwound))
+    {
+      if (process->callbacks->thread_detach)
+	process->callbacks->thread_detach (thread, thread->callbacks_arg);
+      thread_free_all_states (thread);
+      return -1;
+    }
+
+  Dwfl_Frame *state;
+  do
+    {
+      state = thread->unwound;
+      int err = callback (state, arg);
+      if (err != DWARF_CB_OK)
+	{
+	  if (process->callbacks->thread_detach)
+	    process->callbacks->thread_detach (thread, thread->callbacks_arg);
+	  thread_free_all_states (thread);
+	  return err;
+	}
+      __libdwfl_frame_unwind (state);
+      /* The old frame is no longer needed.  */
+      state_free (thread->unwound);
+      state = thread->unwound;
+    }
+  while (state && state->pc_state == DWFL_FRAME_STATE_PC_SET);
+
+  Dwfl_Error err = dwfl_errno ();
+  if (process->callbacks->thread_detach)
+    process->callbacks->thread_detach (thread, thread->callbacks_arg);
+  if (state == NULL || state->pc_state == DWFL_FRAME_STATE_ERROR)
+    {
+      thread_free_all_states (thread);
+      __libdwfl_seterrno (err);
+      return -1;
+    }
+  assert (state->pc_state == DWFL_FRAME_STATE_PC_UNDEFINED);
+  thread_free_all_states (thread);
+  return 0;
+}
+INTDEF(dwfl_thread_getframes)
diff --git a/src/libdwfl/dwfl_frame_pc.c b/src/libdwfl/dwfl_frame_pc.c
new file mode 100644
index 00000000..296c815b
--- /dev/null
+++ b/src/libdwfl/dwfl_frame_pc.c
@@ -0,0 +1,64 @@
+/* Get return address register value for frame.
+   Copyright (C) 2013 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libdwflP.h"
+
+bool
+dwfl_frame_pc (Dwfl_Frame *state, Dwarf_Addr *pc, bool *isactivation)
+{
+  assert (state->pc_state == DWFL_FRAME_STATE_PC_SET);
+  *pc = state->pc;
+  ebl_normalize_pc (state->thread->process->ebl, pc);
+  if (isactivation)
+    {
+      /* Bottom frame?  */
+      if (state->initial_frame)
+	*isactivation = true;
+      /* *ISACTIVATION is logical union of whether current or previous frame
+	 state is SIGNAL_FRAME.  */
+      else if (state->signal_frame)
+	*isactivation = true;
+      else
+	{
+	  /* If the previous frame has unwound unsuccessfully just silently do
+	     not consider it could be a SIGNAL_FRAME.  */
+	  __libdwfl_frame_unwind (state);
+	  if (state->unwound == NULL
+	      || state->unwound->pc_state != DWFL_FRAME_STATE_PC_SET)
+	    *isactivation = false;
+	  else
+	    *isactivation = state->unwound->signal_frame;
+	}
+    }
+  return true;
+}
+INTDEF (dwfl_frame_pc)
diff --git a/src/libdwfl/dwfl_frame_regs.c b/src/libdwfl/dwfl_frame_regs.c
new file mode 100644
index 00000000..10803fe7
--- /dev/null
+++ b/src/libdwfl/dwfl_frame_regs.c
@@ -0,0 +1,57 @@
+/* Get Dwarf Frame state from modules present in DWFL.
+   Copyright (C) 2013 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include "libdwflP.h"
+
+bool
+dwfl_thread_state_registers (Dwfl_Thread *thread, int firstreg,
+			     unsigned nregs, const Dwarf_Word *regs)
+{
+  Dwfl_Frame *state = thread->unwound;
+  assert (state && state->unwound == NULL);
+  assert (state->initial_frame);
+  for (unsigned regno = firstreg; regno < firstreg + nregs; regno++)
+    if (! __libdwfl_frame_reg_set (state, regno, regs[regno - firstreg]))
+      {
+	__libdwfl_seterrno (DWFL_E_INVALID_REGISTER);
+	return false;
+      }
+  return true;
+}
+INTDEF(dwfl_thread_state_registers)
+
+void
+dwfl_thread_state_register_pc (Dwfl_Thread *thread, Dwarf_Word pc)
+{
+  Dwfl_Frame *state = thread->unwound;
+  assert (state && state->unwound == NULL);
+  assert (state->initial_frame);
+  state->pc = pc;
+  state->pc_state = DWFL_FRAME_STATE_PC_SET;
+}
+INTDEF(dwfl_thread_state_register_pc)
diff --git a/src/libdwfl/dwfl_getdwarf.c b/src/libdwfl/dwfl_getdwarf.c
index 0a0656f7..8d1d9ba7 100644
--- a/src/libdwfl/dwfl_getdwarf.c
+++ b/src/libdwfl/dwfl_getdwarf.c
@@ -1,51 +1,30 @@
 /* Iterate through modules to fetch Dwarf information.
    Copyright (C) 2005, 2008 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_getmodules.c b/src/libdwfl/dwfl_getmodules.c
index 7c6ab971..eed9b4ff 100644
--- a/src/libdwfl/dwfl_getmodules.c
+++ b/src/libdwfl/dwfl_getmodules.c
@@ -1,51 +1,30 @@
 /* Iterate through modules.
    Copyright (C) 2005, 2008 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_getsrc.c b/src/libdwfl/dwfl_getsrc.c
index 1cc16953..8d4ae022 100644
--- a/src/libdwfl/dwfl_getsrc.c
+++ b/src/libdwfl/dwfl_getsrc.c
@@ -1,51 +1,30 @@
 /* Find source location for PC address.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_getsrclines.c b/src/libdwfl/dwfl_getsrclines.c
index 790481fd..bdfcf5c6 100644
--- a/src/libdwfl/dwfl_getsrclines.c
+++ b/src/libdwfl/dwfl_getsrclines.c
@@ -1,51 +1,30 @@
 /* Fetch source line information for CU.
-   Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005, 2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
@@ -65,5 +44,5 @@ dwfl_getsrclines (Dwarf_Die *cudie, size_t *nlines)
     }
 
   *nlines = cu->die.cu->lines->nlines;
-  return -1;
+  return 0;
 }
diff --git a/src/libdwfl/dwfl_line_comp_dir.c b/src/libdwfl/dwfl_line_comp_dir.c
index a755524d..bda09c46 100644
--- a/src/libdwfl/dwfl_line_comp_dir.c
+++ b/src/libdwfl/dwfl_line_comp_dir.c
@@ -1,51 +1,30 @@
 /* Get information from a source line record returned by libdwfl.
    Copyright (C) 2005, 2006 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <dwarf.h>
diff --git a/src/libdwfl/dwfl_linecu.c b/src/libdwfl/dwfl_linecu.c
index 34f5bb10..ce78d297 100644
--- a/src/libdwfl/dwfl_linecu.c
+++ b/src/libdwfl/dwfl_linecu.c
@@ -1,51 +1,30 @@
 /* Fetch the module containing a source line record returned by libdwfl.
    Copyright (C) 2006 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_lineinfo.c b/src/libdwfl/dwfl_lineinfo.c
index 6049de84..dfb27d82 100644
--- a/src/libdwfl/dwfl_lineinfo.c
+++ b/src/libdwfl/dwfl_lineinfo.c
@@ -1,51 +1,30 @@
 /* Get information from a source line record returned by libdwfl.
    Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/libdwP.h"
diff --git a/src/libdwfl/dwfl_linemodule.c b/src/libdwfl/dwfl_linemodule.c
index fb98f837..e4a35e09 100644
--- a/src/libdwfl/dwfl_linemodule.c
+++ b/src/libdwfl/dwfl_linemodule.c
@@ -1,51 +1,30 @@
 /* Fetch the module containing a source line record returned by libdwfl.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_module.c b/src/libdwfl/dwfl_module.c
index d7e54138..8efcfaa5 100644
--- a/src/libdwfl/dwfl_module.c
+++ b/src/libdwfl/dwfl_module.c
@@ -1,51 +1,30 @@
 /* Maintenance of module list in libdwfl.
-   Copyright (C) 2005, 2006, 2007, 2008 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005, 2006, 2007, 2008, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <search.h>
@@ -92,7 +71,17 @@ __libdwfl_module_free (Dwfl_Module *mod)
     }
 
   if (mod->dw != NULL)
-    INTUSE(dwarf_end) (mod->dw);
+    {
+      INTUSE(dwarf_end) (mod->dw);
+      if (mod->alt != NULL)
+	{
+	  INTUSE(dwarf_end) (mod->alt);
+	  if (mod->alt_elf != NULL)
+	    elf_end (mod->alt_elf);
+	  if (mod->alt_fd != -1)
+	    close (mod->alt_fd);
+	}
+    }
 
   if (mod->ebl != NULL)
     ebl_closebackend (mod->ebl);
@@ -100,10 +89,17 @@ __libdwfl_module_free (Dwfl_Module *mod)
   if (mod->debug.elf != mod->main.elf)
     free_file (&mod->debug);
   free_file (&mod->main);
+  free_file (&mod->aux_sym);
 
   if (mod->build_id_bits != NULL)
     free (mod->build_id_bits);
 
+  if (mod->reloc_info != NULL)
+    free (mod->reloc_info);
+
+  if (mod->eh_cfi != NULL)
+    dwarf_cfi_end (mod->eh_cfi);
+
   free (mod->name);
   free (mod);
 }
diff --git a/src/libdwfl/dwfl_module_addrdie.c b/src/libdwfl/dwfl_module_addrdie.c
index 2733196f..20d2842a 100644
--- a/src/libdwfl/dwfl_module_addrdie.c
+++ b/src/libdwfl/dwfl_module_addrdie.c
@@ -1,51 +1,30 @@
 /* Fetch the CU DIE for a PC address in a given module.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_module_addrname.c b/src/libdwfl/dwfl_module_addrname.c
index 7d365fe2..88a8139d 100644
--- a/src/libdwfl/dwfl_module_addrname.c
+++ b/src/libdwfl/dwfl_module_addrname.c
@@ -1,57 +1,38 @@
 /* Find debugging and symbol information for a module in libdwfl.
-   Copyright (C) 2005, 2006, 2007 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005, 2006, 2007, 2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
 const char *
 dwfl_module_addrname (Dwfl_Module *mod, GElf_Addr addr)
 {
+  GElf_Off off;
   GElf_Sym sym;
-  return INTUSE(dwfl_module_addrsym) (mod, addr, &sym, NULL);
+  return INTUSE(dwfl_module_addrinfo) (mod, addr, &off, &sym,
+				       NULL, NULL, NULL);
 }
diff --git a/src/libdwfl/dwfl_module_addrsym.c b/src/libdwfl/dwfl_module_addrsym.c
index 9ced0cfb..d205832c 100644
--- a/src/libdwfl/dwfl_module_addrsym.c
+++ b/src/libdwfl/dwfl_module_addrsym.c
@@ -1,51 +1,30 @@
 /* Find debugging and symbol information for a module in libdwfl.
-   Copyright (C) 2005-2011 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
@@ -53,8 +32,10 @@
    Never returns symbols at addresses above ADDR.  */
 
 const char *
-dwfl_module_addrsym (Dwfl_Module *mod, GElf_Addr addr,
-		     GElf_Sym *closest_sym, GElf_Word *shndxp)
+internal_function
+__libdwfl_addrsym (Dwfl_Module *mod, GElf_Addr addr, GElf_Off *off,
+		   GElf_Sym *closest_sym, GElf_Word *shndxp,
+		   Elf **elfp, Dwarf_Addr *biasp, bool adjust_st_value)
 {
   int syments = INTUSE(dwfl_module_getsymtab) (mod);
   if (syments < 0)
@@ -62,19 +43,36 @@ dwfl_module_addrsym (Dwfl_Module *mod, GElf_Addr addr,
 
   /* Return true iff we consider ADDR to lie in the same section as SYM.  */
   GElf_Word addr_shndx = SHN_UNDEF;
-  inline bool same_section (const GElf_Sym *sym, GElf_Word shndx)
+  Elf *addr_symelf = NULL;
+  inline bool same_section (GElf_Addr value, Elf *symelf, GElf_Word shndx)
     {
       /* For absolute symbols and the like, only match exactly.  */
       if (shndx >= SHN_LORESERVE)
-	return sym->st_value == addr;
+	return value == addr;
+
+      /* If value might not be st_value, the shndx of the symbol might
+	 not match the section of the value. Explicitly look both up.  */
+      if (! adjust_st_value)
+	{
+	  Dwarf_Addr v;
+	  if (addr_shndx == SHN_UNDEF)
+	    {
+	      v = addr;
+	      addr_shndx = __libdwfl_find_section_ndx (mod, &v);
+	    }
+
+	  v = value;
+	  return addr_shndx == __libdwfl_find_section_ndx (mod, &v);
+	}
 
       /* Figure out what section ADDR lies in.  */
-      if (addr_shndx == SHN_UNDEF)
+      if (addr_shndx == SHN_UNDEF || addr_symelf != symelf)
 	{
-	  GElf_Addr mod_addr = dwfl_deadjust_st_value (mod, addr);
+	  GElf_Addr mod_addr = dwfl_deadjust_st_value (mod, symelf, addr);
 	  Elf_Scn *scn = NULL;
 	  addr_shndx = SHN_ABS;
-	  while ((scn = elf_nextscn (mod->symfile->elf, scn)) != NULL)
+	  addr_symelf = symelf;
+	  while ((scn = elf_nextscn (symelf, scn)) != NULL)
 	    {
 	      GElf_Shdr shdr_mem;
 	      GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
@@ -88,113 +86,204 @@ dwfl_module_addrsym (Dwfl_Module *mod, GElf_Addr addr,
 	    }
 	}
 
-      return shndx == addr_shndx;
+      return shndx == addr_shndx && addr_symelf == symelf;
     }
 
   /* Keep track of the closest symbol we have seen so far.
      Here we store only symbols with nonzero st_size.  */
   const char *closest_name = NULL;
+  GElf_Addr closest_value = 0;
   GElf_Word closest_shndx = SHN_UNDEF;
+  Elf *closest_elf = NULL;
 
   /* Keep track of an eligible symbol with st_size == 0 as a fallback.  */
   const char *sizeless_name = NULL;
   GElf_Sym sizeless_sym = { 0, 0, 0, 0, 0, SHN_UNDEF };
+  GElf_Addr sizeless_value = 0;
   GElf_Word sizeless_shndx = SHN_UNDEF;
+  Elf *sizeless_elf = NULL;
 
   /* Keep track of the lowest address a relevant sizeless symbol could have.  */
   GElf_Addr min_label = 0;
 
+  /* Try one symbol and associated value from the search table.  */
+  inline void try_sym_value (GElf_Addr value, GElf_Sym *sym,
+			     const char *name, GElf_Word shndx,
+			     Elf *elf, bool resolved)
+  {
+    /* Even if we don't choose this symbol, its existence excludes
+       any sizeless symbol (assembly label) that is below its upper
+       bound.  */
+    if (value + sym->st_size > min_label)
+      min_label = value + sym->st_size;
+
+    if (sym->st_size == 0 || addr - value < sym->st_size)
+      {
+	/* Return GELF_ST_BIND as higher-is-better integer.  */
+	inline int binding_value (const GElf_Sym *symp)
+	{
+	  switch (GELF_ST_BIND (symp->st_info))
+	    {
+	    case STB_GLOBAL:
+	      return 3;
+	    case STB_WEAK:
+	      return 2;
+	    case STB_LOCAL:
+	      return 1;
+	    default:
+	      return 0;
+	    }
+	}
+
+	/* This symbol is a better candidate than the current one
+	   if it's closer to ADDR or is global when it was local.  */
+	if (closest_name == NULL
+	    || closest_value < value
+	    || binding_value (closest_sym) < binding_value (sym))
+	  {
+	    if (sym->st_size != 0)
+	      {
+		*closest_sym = *sym;
+		closest_value = value;
+		closest_shndx = shndx;
+		closest_elf = elf;
+		closest_name = name;
+	      }
+	    else if (closest_name == NULL
+		     && value >= min_label
+		     && same_section (value,
+				      resolved ? mod->main.elf : elf, shndx))
+	      {
+		/* Handwritten assembly symbols sometimes have no
+		   st_size.  If no symbol with proper size includes
+		   the address, we'll use the closest one that is in
+		   the same section as ADDR.  */
+		sizeless_sym = *sym;
+		sizeless_value = value;
+		sizeless_shndx = shndx;
+		sizeless_elf = elf;
+		sizeless_name = name;
+	      }
+	  }
+	/* When the beginning of its range is no closer,
+	   the end of its range might be.  Otherwise follow
+	   GELF_ST_BIND preference.  If all are equal prefer
+	   the first symbol found.  */
+	else if (sym->st_size != 0
+		 && closest_value == value
+		 && ((closest_sym->st_size > sym->st_size
+		      && (binding_value (closest_sym)
+			  <= binding_value (sym)))
+		     || (closest_sym->st_size >= sym->st_size
+			 && (binding_value (closest_sym)
+			     < binding_value (sym)))))
+	  {
+	    *closest_sym = *sym;
+	    closest_value = value;
+	    closest_shndx = shndx;
+	    closest_elf = elf;
+	    closest_name = name;
+	  }
+      }
+  }
+
   /* Look through the symbol table for a matching symbol.  */
   inline void search_table (int start, int end)
     {
       for (int i = start; i < end; ++i)
 	{
 	  GElf_Sym sym;
+	  GElf_Addr value;
 	  GElf_Word shndx;
-	  const char *name = INTUSE(dwfl_module_getsym) (mod, i, &sym, &shndx);
+	  Elf *elf;
+	  bool resolved;
+	  const char *name = __libdwfl_getsym (mod, i, &sym, &value,
+					       &shndx, &elf, NULL,
+					       &resolved, adjust_st_value);
 	  if (name != NULL && name[0] != '\0'
 	      && sym.st_shndx != SHN_UNDEF
-	      && sym.st_value <= addr
+	      && value <= addr
 	      && GELF_ST_TYPE (sym.st_info) != STT_SECTION
 	      && GELF_ST_TYPE (sym.st_info) != STT_FILE
 	      && GELF_ST_TYPE (sym.st_info) != STT_TLS)
 	    {
-	      /* Even if we don't choose this symbol, its existence excludes
-		 any sizeless symbol (assembly label) that is below its upper
-		 bound.  */
-	      if (sym.st_value + sym.st_size > min_label)
-		min_label = sym.st_value + sym.st_size;
+	      try_sym_value (value, &sym, name, shndx, elf, resolved);
 
-	      if (sym.st_size == 0 || addr - sym.st_value < sym.st_size)
+	      /* If this is an addrinfo variant and the value could be
+		 resolved then also try matching the (adjusted) st_value.  */
+	      if (resolved && mod->e_type != ET_REL)
 		{
-		  /* This symbol is a better candidate than the current one
-		     if it's closer to ADDR or is global when it was local.  */
-		  if (closest_name == NULL
-		      || closest_sym->st_value < sym.st_value
-		      || (GELF_ST_BIND (closest_sym->st_info)
-			  < GELF_ST_BIND (sym.st_info)))
-		    {
-		      if (sym.st_size != 0)
-			{
-			  *closest_sym = sym;
-			  closest_shndx = shndx;
-			  closest_name = name;
-			}
-		      else if (closest_name == NULL
-			       && sym.st_value >= min_label
-			       && same_section (&sym, shndx))
-			{
-			  /* Handwritten assembly symbols sometimes have no
-			     st_size.  If no symbol with proper size includes
-			     the address, we'll use the closest one that is in
-			     the same section as ADDR.  */
-			  sizeless_sym = sym;
-			  sizeless_shndx = shndx;
-			  sizeless_name = name;
-			}
-		    }
-		  /* When the beginning of its range is no closer,
-		     the end of its range might be.  But do not
-		     replace a global symbol with a local!  */
-		  else if (sym.st_size != 0
-			   && closest_sym->st_value == sym.st_value
-			   && closest_sym->st_size > sym.st_size
-			   && (GELF_ST_BIND (closest_sym->st_info)
-			       <= GELF_ST_BIND (sym.st_info)))
-		    {
-		      *closest_sym = sym;
-		      closest_shndx = shndx;
-		      closest_name = name;
-		    }
+		  GElf_Addr adjusted_st_value;
+		  adjusted_st_value = dwfl_adjusted_st_value (mod, elf,
+							      sym.st_value);
+		  if (value != adjusted_st_value && adjusted_st_value <= addr)
+		    try_sym_value (adjusted_st_value, &sym, name, shndx,
+				   elf, false);
 		}
 	    }
 	}
     }
 
-  /* First go through global symbols.  mod->first_global is setup by
-     dwfl_module_getsymtab to the index of the first global symbol in
-     the module's symbol table, or -1 when unknown.  All symbols with
-     local binding come first in the symbol table, then all globals.  */
-  search_table (mod->first_global < 0 ? 1 : mod->first_global, syments);
+  /* First go through global symbols.  mod->first_global and
+     mod->aux_first_global are setup by dwfl_module_getsymtab to the
+     index of the first global symbol in those symbol tables.  Both
+     are non-zero when the table exist, except when there is only a
+     dynsym table loaded through phdrs, then first_global is zero and
+     there will be no auxiliary table.  All symbols with local binding
+     come first in the symbol table, then all globals.  The zeroth,
+     null entry, in the auxiliary table is skipped if there is a main
+     table.  */
+  int first_global = INTUSE (dwfl_module_getsymtab_first_global) (mod);
+  if (first_global < 0)
+    return NULL;
+  search_table (first_global == 0 ? 1 : first_global, syments);
 
   /* If we found nothing searching the global symbols, then try the locals.
      Unless we have a global sizeless symbol that matches exactly.  */
-  if (closest_name == NULL && mod->first_global > 1
-      && (sizeless_name == NULL || sizeless_sym.st_value != addr))
-    search_table (1, mod->first_global);
+  if (closest_name == NULL && first_global > 1
+      && (sizeless_name == NULL || sizeless_value != addr))
+    search_table (1, first_global);
 
   /* If we found no proper sized symbol to use, fall back to the best
      candidate sizeless symbol we found, if any.  */
   if (closest_name == NULL
-      && sizeless_name != NULL && sizeless_sym.st_value >= min_label)
+      && sizeless_name != NULL && sizeless_value >= min_label)
     {
       *closest_sym = sizeless_sym;
+      closest_value = sizeless_value;
       closest_shndx = sizeless_shndx;
+      closest_elf = sizeless_elf;
       closest_name = sizeless_name;
     }
 
+  *off = addr - closest_value;
+
   if (shndxp != NULL)
     *shndxp = closest_shndx;
+  if (elfp != NULL)
+    *elfp = closest_elf;
+  if (biasp != NULL)
+    *biasp = dwfl_adjusted_st_value (mod, closest_elf, 0);
   return closest_name;
 }
+
+
+const char *
+dwfl_module_addrsym (Dwfl_Module *mod, GElf_Addr addr,
+		     GElf_Sym *closest_sym, GElf_Word *shndxp)
+{
+  GElf_Off off;
+  return __libdwfl_addrsym (mod, addr, &off, closest_sym, shndxp,
+			    NULL, NULL, true);
+}
 INTDEF (dwfl_module_addrsym)
+
+const char
+*dwfl_module_addrinfo (Dwfl_Module *mod, GElf_Addr address,
+		       GElf_Off *offset, GElf_Sym *sym,
+		       GElf_Word *shndxp, Elf **elfp, Dwarf_Addr *bias)
+{
+  return __libdwfl_addrsym (mod, address, offset, sym, shndxp, elfp, bias,
+			    false);
+}
+INTDEF (dwfl_module_addrinfo)
diff --git a/src/libdwfl/dwfl_module_build_id.c b/src/libdwfl/dwfl_module_build_id.c
index f9888660..350bbf83 100644
--- a/src/libdwfl/dwfl_module_build_id.c
+++ b/src/libdwfl/dwfl_module_build_id.c
@@ -1,51 +1,30 @@
 /* Return build ID information for a module.
-   Copyright (C) 2007-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2007-2010, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
@@ -73,82 +52,25 @@ found_build_id (Dwfl_Module *mod, bool set,
   return len;
 }
 
-#define NO_VADDR	((GElf_Addr) -1l)
-
-static int
-check_notes (Dwfl_Module *mod, bool set, Elf_Data *data, GElf_Addr data_vaddr)
-{
-  size_t pos = 0;
-  GElf_Nhdr nhdr;
-  size_t name_pos;
-  size_t desc_pos;
-  while ((pos = gelf_getnote (data, pos, &nhdr, &name_pos, &desc_pos)) > 0)
-    if (nhdr.n_type == NT_GNU_BUILD_ID
-	&& nhdr.n_namesz == sizeof "GNU" && !memcmp (data->d_buf + name_pos,
-						     "GNU", sizeof "GNU"))
-      return found_build_id (mod, set,
-			     data->d_buf + desc_pos, nhdr.n_descsz,
-			     data_vaddr == NO_VADDR ? 0
-			     : data_vaddr + desc_pos);
-  return 0;
-}
-
 int
 internal_function
 __libdwfl_find_build_id (Dwfl_Module *mod, bool set, Elf *elf)
 {
-  size_t shstrndx = SHN_UNDEF;
-  int result = 0;
+  const void *build_id_bits;
+  GElf_Addr build_id_elfaddr;
+  int build_id_len;
 
-  Elf_Scn *scn = elf_nextscn (elf, NULL);
+  /* For mod == NULL use dwelf_elf_gnu_build_id directly.  */
+  assert (mod != NULL);
 
-  if (scn == NULL)
-    {
-      /* No sections, have to look for phdrs.  */
-      GElf_Ehdr ehdr_mem;
-      GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
-      size_t phnum;
-      if (unlikely (ehdr == NULL)
-	  || unlikely (elf_getphdrnum (elf, &phnum) != 0))
-	{
-	  __libdwfl_seterrno (DWFL_E_LIBELF);
-	  return -1;
-	}
-      for (size_t i = 0; result == 0 && i < phnum; ++i)
-	{
-	  GElf_Phdr phdr_mem;
-	  GElf_Phdr *phdr = gelf_getphdr (elf, i, &phdr_mem);
-	  if (likely (phdr != NULL) && phdr->p_type == PT_NOTE)
-	    result = check_notes (mod, set,
-				  elf_getdata_rawchunk (elf,
-							phdr->p_offset,
-							phdr->p_filesz,
-							ELF_T_NHDR),
-				  dwfl_adjusted_address (mod, phdr->p_vaddr));
-	}
-    }
-  else
-    do
-      {
-	GElf_Shdr shdr_mem;
-	GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
-	if (likely (shdr != NULL) && shdr->sh_type == SHT_NOTE)
-	  {
-	    /* Determine the right sh_addr in this module.  */
-	    GElf_Addr vaddr = 0;
-	    if (!(shdr->sh_flags & SHF_ALLOC))
-	      vaddr = NO_VADDR;
-	    else if (mod->e_type != ET_REL)
-	      vaddr = dwfl_adjusted_address (mod, shdr->sh_addr);
-	    else if (__libdwfl_relocate_value (mod, elf, &shstrndx,
-					       elf_ndxscn (scn), &vaddr))
-	      vaddr = NO_VADDR;
-	    result = check_notes (mod, set, elf_getdata (scn, NULL), vaddr);
-	  }
-      }
-    while (result == 0 && (scn = elf_nextscn (elf, scn)) != NULL);
+  int result = __libdwfl_find_elf_build_id (mod, elf, &build_id_bits,
+					    &build_id_elfaddr, &build_id_len);
+  if (result <= 0)
+    return result;
 
-  return result;
+  GElf_Addr build_id_vaddr = build_id_elfaddr + (build_id_elfaddr != 0
+						 ? mod->main_bias : 0);
+  return found_build_id (mod, set, build_id_bits, build_id_len, build_id_vaddr);
 }
 
 int
diff --git a/src/libdwfl/dwfl_module_dwarf_cfi.c b/src/libdwfl/dwfl_module_dwarf_cfi.c
index 96e60fbf..5182d6a0 100644
--- a/src/libdwfl/dwfl_module_dwarf_cfi.c
+++ b/src/libdwfl/dwfl_module_dwarf_cfi.c
@@ -1,51 +1,30 @@
 /* Find DWARF CFI for a module in libdwfl.
    Copyright (C) 2009-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/cfi.h"
diff --git a/src/libdwfl/dwfl_module_eh_cfi.c b/src/libdwfl/dwfl_module_eh_cfi.c
index 79c8279c..da10d9fb 100644
--- a/src/libdwfl/dwfl_module_eh_cfi.c
+++ b/src/libdwfl/dwfl_module_eh_cfi.c
@@ -1,51 +1,30 @@
 /* Find EH CFI for a module in libdwfl.
    Copyright (C) 2009-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/cfi.h"
diff --git a/src/libdwfl/dwfl_module_getdwarf.c b/src/libdwfl/dwfl_module_getdwarf.c
index 14fcd550..494407dd 100644
--- a/src/libdwfl/dwfl_module_getdwarf.c
+++ b/src/libdwfl/dwfl_module_getdwarf.c
@@ -1,65 +1,43 @@
 /* Find debugging and symbol information for a module in libdwfl.
-   Copyright (C) 2005-2011 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2012, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
+#include <inttypes.h>
 #include <fcntl.h>
 #include <string.h>
 #include <unistd.h>
 #include "../libdw/libdwP.h"	/* DWARF_E_* values are here.  */
+#include "../libelf/libelfP.h"
 
-
-/* Open libelf FILE->fd and compute the load base of ELF as loaded in MOD.
-   When we return success, FILE->elf and FILE->vaddr are set up.  */
 static inline Dwfl_Error
-open_elf (Dwfl_Module *mod, struct dwfl_file *file)
+open_elf_file (Elf **elf, int *fd, char **name)
 {
-  if (file->elf == NULL)
+  if (*elf == NULL)
     {
       /* CBFAIL uses errno if it's set, so clear it first in case we don't
 	 set it with an open failure below.  */
@@ -67,25 +45,36 @@ open_elf (Dwfl_Module *mod, struct dwfl_file *file)
 
       /* If there was a pre-primed file name left that the callback left
 	 behind, try to open that file name.  */
-      if (file->fd < 0 && file->name != NULL)
-	file->fd = TEMP_FAILURE_RETRY (open64 (file->name, O_RDONLY));
+      if (*fd < 0 && *name != NULL)
+	*fd = TEMP_FAILURE_RETRY (open64 (*name, O_RDONLY));
 
-      if (file->fd < 0)
+      if (*fd < 0)
 	return CBFAIL;
 
-      Dwfl_Error error = __libdw_open_file (&file->fd, &file->elf, true, false);
-      if (error != DWFL_E_NOERROR)
-	return error;
+      return __libdw_open_file (fd, elf, true, false);
     }
-  else if (unlikely (elf_kind (file->elf) != ELF_K_ELF))
+  else if (unlikely (elf_kind (*elf) != ELF_K_ELF))
     {
-      elf_end (file->elf);
-      file->elf = NULL;
-      close (file->fd);
-      file->fd = -1;
+      elf_end (*elf);
+      *elf = NULL;
+      close (*fd);
+      *fd = -1;
       return DWFL_E_BADELF;
     }
 
+  /* Elf file already open and looks fine.  */
+  return DWFL_E_NOERROR;
+}
+
+/* Open libelf FILE->fd and compute the load base of ELF as loaded in MOD.
+   When we return success, FILE->elf and FILE->vaddr are set up.  */
+static inline Dwfl_Error
+open_elf (Dwfl_Module *mod, struct dwfl_file *file)
+{
+  Dwfl_Error error = open_elf_file (&file->elf, &file->fd, &file->name);
+  if (error != DWFL_E_NOERROR)
+    return error;
+
   GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (file->elf, &ehdr_mem);
   if (ehdr == NULL)
     {
@@ -97,7 +86,7 @@ open_elf (Dwfl_Module *mod, struct dwfl_file *file)
       return DWFL_E (LIBELF, elf_errno ());
     }
 
-  if (mod->e_type != ET_REL)
+  if (ehdr->e_type != ET_REL)
     {
       /* In any non-ET_REL file, we compute the "synchronization address".
 
@@ -151,15 +140,65 @@ open_elf (Dwfl_Module *mod, struct dwfl_file *file)
 	}
     }
 
-  mod->e_type = ehdr->e_type;
+  /* We only want to set the module e_type explictly once, derived from
+     the main ELF file.  (It might be changed for the kernel, because
+     that is special - see below.)  open_elf is always called first for
+     the main ELF file, because both find_dw and find_symtab call
+     __libdwfl_getelf first to open the main file.  So don't let debug
+     or aux files override the module e_type.  The kernel heuristic
+     below could otherwise trigger for non-kernel/non-main files, since
+     their phdrs might not match the actual load addresses.  */
+  if (file == &mod->main)
+    {
+      mod->e_type = ehdr->e_type;
 
-  /* Relocatable Linux kernels are ET_EXEC but act like ET_DYN.  */
-  if (mod->e_type == ET_EXEC && file->vaddr != mod->low_addr)
-    mod->e_type = ET_DYN;
+      /* Relocatable Linux kernels are ET_EXEC but act like ET_DYN.  */
+      if (mod->e_type == ET_EXEC && file->vaddr != mod->low_addr)
+	mod->e_type = ET_DYN;
+    }
+  else
+    assert (mod->main.elf != NULL);
 
   return DWFL_E_NOERROR;
 }
 
+/* We have an authoritative build ID for this module MOD, so don't use
+   a file by name that doesn't match that ID.  */
+static void
+mod_verify_build_id (Dwfl_Module *mod)
+{
+  assert (mod->build_id_len > 0);
+
+  switch (__builtin_expect (__libdwfl_find_build_id (mod, false,
+						     mod->main.elf), 2))
+    {
+    case 2:
+      /* Build ID matches as it should. */
+      return;
+
+    case -1:			/* ELF error.  */
+      mod->elferr = INTUSE(dwfl_errno) ();
+      break;
+
+    case 0:			/* File has no build ID note.  */
+    case 1:			/* FIle has a build ID that does not match.  */
+      mod->elferr = DWFL_E_WRONG_ID_ELF;
+      break;
+
+    default:
+      abort ();
+    }
+
+  /* We get here when it was the right ELF file.  Clear it out.  */
+  elf_end (mod->main.elf);
+  mod->main.elf = NULL;
+  if (mod->main.fd >= 0)
+    {
+      close (mod->main.fd);
+      mod->main.fd = -1;
+    }
+}
+
 /* Find the main ELF file for this module and open libelf on it.
    When we return success, MOD->main.elf and MOD->main.bias are set up.  */
 void
@@ -187,105 +226,11 @@ __libdwfl_getelf (Dwfl_Module *mod)
       mod->build_id_len = 0;
     }
   else if (fallback)
-    {
-      /* We have an authoritative build ID for this module, so
-	 don't use a file by name that doesn't match that ID.  */
-
-      assert (mod->build_id_len > 0);
-
-      switch (__builtin_expect (__libdwfl_find_build_id (mod, false,
-							 mod->main.elf), 2))
-	{
-	case 2:
-	  /* Build ID matches as it should. */
-	  return;
-
-	case -1:			/* ELF error.  */
-	  mod->elferr = INTUSE(dwfl_errno) ();
-	  break;
-
-	case 0:			/* File has no build ID note.  */
-	case 1:			/* FIle has a build ID that does not match.  */
-	  mod->elferr = DWFL_E_WRONG_ID_ELF;
-	  break;
-
-	default:
-	  abort ();
-	}
-
-      /* We get here when it was the right ELF file.  Clear it out.  */
-      elf_end (mod->main.elf);
-      mod->main.elf = NULL;
-      if (mod->main.fd >= 0)
-	{
-	  close (mod->main.fd);
-	  mod->main.fd = -1;
-	}
-    }
+    mod_verify_build_id (mod);
 
   mod->main_bias = mod->e_type == ET_REL ? 0 : mod->low_addr - mod->main.vaddr;
 }
 
-/* Search an ELF file for a ".gnu_debuglink" section.  */
-static const char *
-find_debuglink (Elf *elf, GElf_Word *crc)
-{
-  size_t shstrndx;
-  if (elf_getshdrstrndx (elf, &shstrndx) < 0)
-    return NULL;
-
-  Elf_Scn *scn = NULL;
-  while ((scn = elf_nextscn (elf, scn)) != NULL)
-    {
-      GElf_Shdr shdr_mem;
-      GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
-      if (shdr == NULL)
-	return NULL;
-
-      const char *name = elf_strptr (elf, shstrndx, shdr->sh_name);
-      if (name == NULL)
-	return NULL;
-
-      if (!strcmp (name, ".gnu_debuglink"))
-	break;
-    }
-
-  if (scn == NULL)
-    return NULL;
-
-  /* Found the .gnu_debuglink section.  Extract its contents.  */
-  Elf_Data *rawdata = elf_rawdata (scn, NULL);
-  if (rawdata == NULL)
-    return NULL;
-
-  Elf_Data crcdata =
-    {
-      .d_type = ELF_T_WORD,
-      .d_buf = crc,
-      .d_size = sizeof *crc,
-      .d_version = EV_CURRENT,
-    };
-  Elf_Data conv =
-    {
-      .d_type = ELF_T_WORD,
-      .d_buf = rawdata->d_buf + rawdata->d_size - sizeof *crc,
-      .d_size = sizeof *crc,
-      .d_version = EV_CURRENT,
-    };
-
-  GElf_Ehdr ehdr_mem;
-  GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
-  if (ehdr == NULL)
-    return NULL;
-
-  Elf_Data *d = gelf_xlatetom (elf, &crcdata, &conv, ehdr->e_ident[EI_DATA]);
-  if (d == NULL)
-    return NULL;
-  assert (d == &crcdata);
-
-  return rawdata->d_buf;
-}
-
 /* If the main file might have been prelinked, then we need to
    discover the correct synchronization address between the main and
    debug files.  Because of prelink's section juggling, we cannot rely
@@ -303,7 +248,7 @@ find_debuglink (Elf *elf, GElf_Word *crc)
    looked like before prelink juggled them--when they still had a
    direct correspondence to the debug file.  */
 static Dwfl_Error
-find_prelink_address_sync (Dwfl_Module *mod)
+find_prelink_address_sync (Dwfl_Module *mod, struct dwfl_file *file)
 {
   /* The magic section is only identified by name.  */
   size_t shstrndx;
@@ -530,8 +475,8 @@ find_prelink_address_sync (Dwfl_Module *mod)
 	  consider_shdr (undo_interp, shdr.s64[i].sh_type, shdr.s64[i].sh_flags,
 			 shdr.s64[i].sh_addr, shdr.s64[i].sh_size);
 
-      if (highest > mod->debug.vaddr)
-	mod->debug.address_sync = highest;
+      if (highest > file->vaddr)
+	file->address_sync = highest;
       else
 	return DWFL_E_BAD_PRELINK;
     }
@@ -548,7 +493,9 @@ find_debuginfo (Dwfl_Module *mod)
     return DWFL_E_NOERROR;
 
   GElf_Word debuglink_crc = 0;
-  const char *debuglink_file = find_debuglink (mod->main.elf, &debuglink_crc);
+  const char *debuglink_file;
+  debuglink_file = INTUSE(dwelf_elf_gnu_debuglink) (mod->main.elf,
+						    &debuglink_crc);
 
   mod->debug.fd = (*mod->dwfl->callbacks->find_debuginfo) (MODCB_ARGS (mod),
 							   mod->main.name,
@@ -557,10 +504,59 @@ find_debuginfo (Dwfl_Module *mod)
 							   &mod->debug.name);
   Dwfl_Error result = open_elf (mod, &mod->debug);
   if (result == DWFL_E_NOERROR && mod->debug.address_sync != 0)
-    result = find_prelink_address_sync (mod);
+    result = find_prelink_address_sync (mod, &mod->debug);
   return result;
 }
 
+/* Try to find the alternative debug link for the given DWARF and set
+   it if found.  Only called when mod->dw is already setup but still
+   might need an alternative (dwz multi) debug file.  filename is either
+   the main or debug name from which the Dwarf was created. */
+static void
+find_debug_altlink (Dwfl_Module *mod, const char *filename)
+{
+  assert (mod->dw != NULL);
+
+  const char *altname;
+  const void *build_id;
+  ssize_t build_id_len = INTUSE(dwelf_dwarf_gnu_debugaltlink) (mod->dw,
+							       &altname,
+							       &build_id);
+
+  if (build_id_len > 0)
+    {
+      /* We could store altfile in the module, but don't really need it.  */
+      char *altfile = NULL;
+      mod->alt_fd = (*mod->dwfl->callbacks->find_debuginfo) (MODCB_ARGS (mod),
+							     filename,
+							     altname,
+							     0,
+							     &altfile);
+
+      /* The (internal) callbacks might just set mod->alt_elf directly
+	 because they open the Elf anyway for sanity checking.
+	 Otherwise open either the given file name or use the fd
+	 returned.  */
+      Dwfl_Error error = open_elf_file (&mod->alt_elf, &mod->alt_fd,
+					&altfile);
+      if (error == DWFL_E_NOERROR)
+	{
+	  mod->alt = INTUSE(dwarf_begin_elf) (mod->alt_elf,
+					      DWARF_C_READ, NULL);
+	  if (mod->alt == NULL)
+	    {
+	      elf_end (mod->alt_elf);
+	      mod->alt_elf = NULL;
+	      close (mod->alt_fd);
+	      mod->alt_fd = -1;
+	    }
+	  else
+	    dwarf_setalt (mod->dw, mod->alt);
+	}
+
+      free (altfile); /* See above, we don't really need it.  */
+    }
+}
 
 /* Try to find a symbol table in FILE.
    Returns DWFL_E_NOERROR if a proper one is found.
@@ -579,6 +575,8 @@ load_symtab (struct dwfl_file *file, struct dwfl_file **symfile,
 	switch (shdr->sh_type)
 	  {
 	  case SHT_SYMTAB:
+	    if (shdr->sh_entsize == 0)
+	      break;
 	    symtab = true;
 	    *symscn = scn;
 	    *symfile = file;
@@ -593,10 +591,13 @@ load_symtab (struct dwfl_file *file, struct dwfl_file **symfile,
 	    if (symtab)
 	      break;
 	    /* Use this if need be, but keep looking for SHT_SYMTAB.  */
+	    if (shdr->sh_entsize == 0)
+	      break;
 	    *symscn = scn;
 	    *symfile = file;
 	    *strshndx = shdr->sh_link;
 	    *syments = shdr->sh_size / shdr->sh_entsize;
+	    *first_global = shdr->sh_info;
 	    break;
 
 	  case SHT_SYMTAB_SHNDX:
@@ -624,7 +625,7 @@ load_symtab (struct dwfl_file *file, struct dwfl_file **symfile,
 /* Translate addresses into file offsets.
    OFFS[*] start out zero and remain zero if unresolved.  */
 static void
-find_offsets (Elf *elf, size_t phnum, size_t n,
+find_offsets (Elf *elf, GElf_Addr main_bias, size_t phnum, size_t n,
 	      GElf_Addr addrs[n], GElf_Off offs[n])
 {
   size_t unsolved = n;
@@ -635,10 +636,10 @@ find_offsets (Elf *elf, size_t phnum, size_t n,
       if (phdr != NULL && phdr->p_type == PT_LOAD && phdr->p_memsz > 0)
 	for (size_t j = 0; j < n; ++j)
 	  if (offs[j] == 0
-	      && addrs[j] >= phdr->p_vaddr
-	      && addrs[j] - phdr->p_vaddr < phdr->p_filesz)
+	      && addrs[j] >= phdr->p_vaddr + main_bias
+	      && addrs[j] - (phdr->p_vaddr + main_bias) < phdr->p_filesz)
 	    {
-	      offs[j] = addrs[j] - phdr->p_vaddr + phdr->p_offset;
+	      offs[j] = addrs[j] - (phdr->p_vaddr + main_bias) + phdr->p_offset;
 	      if (--unsolved == 0)
 		break;
 	    }
@@ -721,122 +722,288 @@ find_dynsym (Dwfl_Module *mod)
 	      break;
 	    }
 
-	  /* Translate pointers into file offsets.  */
-	  GElf_Off offs[i_max] = { 0, };
-	  find_offsets (mod->main.elf, phnum, i_max, addrs, offs);
-
-	  /* Figure out the size of the symbol table.  */
-	  if (offs[i_hash] != 0)
-	    {
-	      /* In the original format, .hash says the size of .dynsym.  */
-
-	      size_t entsz = SH_ENTSIZE_HASH (ehdr);
-	      data = elf_getdata_rawchunk (mod->main.elf,
-					   offs[i_hash] + entsz, entsz,
-					   entsz == 4 ? ELF_T_WORD
-					   : ELF_T_XWORD);
-	      if (data != NULL)
-		mod->syments = (entsz == 4
-				? *(const GElf_Word *) data->d_buf
-				: *(const GElf_Xword *) data->d_buf);
-	    }
-	  if (offs[i_gnu_hash] != 0 && mod->syments == 0)
-	    {
-	      /* In the new format, we can derive it with some work.  */
+	  /* Translate pointers into file offsets.  ADJUST is either zero
+	     in case the dynamic segment wasn't adjusted or mod->main_bias.  */
+	  void translate_offs (GElf_Addr adjust)
+	  {
+	    GElf_Off offs[i_max] = { 0, };
+	    find_offsets (mod->main.elf, adjust, phnum, i_max, addrs, offs);
 
-	      const struct
+	    /* Figure out the size of the symbol table.  */
+	    if (offs[i_hash] != 0)
+	      {
+		/* In the original format, .hash says the size of .dynsym.  */
+
+		size_t entsz = SH_ENTSIZE_HASH (ehdr);
+		data = elf_getdata_rawchunk (mod->main.elf,
+					     offs[i_hash] + entsz, entsz,
+					     entsz == 4 ? ELF_T_WORD
+					     : ELF_T_XWORD);
+		if (data != NULL)
+		  mod->syments = (entsz == 4
+				  ? *(const GElf_Word *) data->d_buf
+				  : *(const GElf_Xword *) data->d_buf);
+	      }
+	    if (offs[i_gnu_hash] != 0 && mod->syments == 0)
 	      {
-		Elf32_Word nbuckets;
-		Elf32_Word symndx;
-		Elf32_Word maskwords;
-		Elf32_Word shift2;
-	      } *header;
-
-	      data = elf_getdata_rawchunk (mod->main.elf, offs[i_gnu_hash],
-					   sizeof *header, ELF_T_WORD);
-	      if (data != NULL)
+		/* In the new format, we can derive it with some work.  */
+
+		const struct
 		{
-		  header = data->d_buf;
-		  Elf32_Word nbuckets = header->nbuckets;
-		  Elf32_Word symndx = header->symndx;
-		  GElf_Off buckets_at = (offs[i_gnu_hash] + sizeof *header
-					 + (gelf_getclass (mod->main.elf)
-					    * sizeof (Elf32_Word)
-					    * header->maskwords));
-
-		  data = elf_getdata_rawchunk (mod->main.elf, buckets_at,
-					       nbuckets * sizeof (Elf32_Word),
-					       ELF_T_WORD);
-		  if (data != NULL && symndx < nbuckets)
-		    {
-		      const Elf32_Word *const buckets = data->d_buf;
-		      Elf32_Word maxndx = symndx;
-		      for (Elf32_Word bucket = 0; bucket < nbuckets; ++bucket)
-			if (buckets[bucket] > maxndx)
-			  maxndx = buckets[bucket];
-
-		      GElf_Off hasharr_at = (buckets_at
-					     + nbuckets * sizeof (Elf32_Word));
-		      hasharr_at += (maxndx - symndx) * sizeof (Elf32_Word);
-		      do
-			{
-			  data = elf_getdata_rawchunk (mod->main.elf,
-						       hasharr_at,
-						       sizeof (Elf32_Word),
-						       ELF_T_WORD);
-			  if (data != NULL
-			      && (*(const Elf32_Word *) data->d_buf & 1u))
-			    {
-			      mod->syments = maxndx + 1;
-			      break;
-			    }
-			  ++maxndx;
-			  hasharr_at += sizeof (Elf32_Word);
-			} while (data != NULL);
-		    }
-		}
-	    }
-	  if (offs[i_strtab] > offs[i_symtab] && mod->syments == 0)
-	    mod->syments = ((offs[i_strtab] - offs[i_symtab])
-			    / gelf_fsize (mod->main.elf,
-					  ELF_T_SYM, 1, EV_CURRENT));
+		  Elf32_Word nbuckets;
+		  Elf32_Word symndx;
+		  Elf32_Word maskwords;
+		  Elf32_Word shift2;
+		} *header;
+
+		data = elf_getdata_rawchunk (mod->main.elf, offs[i_gnu_hash],
+					     sizeof *header, ELF_T_WORD);
+		if (data != NULL)
+		  {
+		    header = data->d_buf;
+		    Elf32_Word nbuckets = header->nbuckets;
+		    Elf32_Word symndx = header->symndx;
+		    GElf_Off buckets_at = (offs[i_gnu_hash] + sizeof *header
+					   + (gelf_getclass (mod->main.elf)
+					      * sizeof (Elf32_Word)
+					      * header->maskwords));
+
+		    // elf_getdata_rawchunk takes a size_t, make sure it
+		    // doesn't overflow.
+#if SIZE_MAX <= UINT32_MAX
+		    if (nbuckets > SIZE_MAX / sizeof (Elf32_Word))
+		      data = NULL;
+		    else
+#endif
+		      data
+			 = elf_getdata_rawchunk (mod->main.elf, buckets_at,
+						 nbuckets * sizeof (Elf32_Word),
+						 ELF_T_WORD);
+		    if (data != NULL && symndx < nbuckets)
+		      {
+			const Elf32_Word *const buckets = data->d_buf;
+			Elf32_Word maxndx = symndx;
+			for (Elf32_Word bucket = 0; bucket < nbuckets; ++bucket)
+			  if (buckets[bucket] > maxndx)
+			    maxndx = buckets[bucket];
+
+			GElf_Off hasharr_at = (buckets_at
+					       + nbuckets * sizeof (Elf32_Word));
+			hasharr_at += (maxndx - symndx) * sizeof (Elf32_Word);
+			do
+			  {
+			    data = elf_getdata_rawchunk (mod->main.elf,
+							 hasharr_at,
+							 sizeof (Elf32_Word),
+							 ELF_T_WORD);
+			    if (data != NULL
+				&& (*(const Elf32_Word *) data->d_buf & 1u))
+			      {
+				mod->syments = maxndx + 1;
+				break;
+			      }
+			    ++maxndx;
+			    hasharr_at += sizeof (Elf32_Word);
+			  } while (data != NULL);
+		      }
+		  }
+	      }
+	    if (offs[i_strtab] > offs[i_symtab] && mod->syments == 0)
+	      mod->syments = ((offs[i_strtab] - offs[i_symtab])
+			      / gelf_fsize (mod->main.elf,
+					    ELF_T_SYM, 1, EV_CURRENT));
+
+	    if (mod->syments > 0)
+	      {
+		mod->symdata = elf_getdata_rawchunk (mod->main.elf,
+						     offs[i_symtab],
+						     gelf_fsize (mod->main.elf,
+								 ELF_T_SYM,
+								 mod->syments,
+								 EV_CURRENT),
+						     ELF_T_SYM);
+		if (mod->symdata != NULL)
+		  {
+		    mod->symstrdata = elf_getdata_rawchunk (mod->main.elf,
+							    offs[i_strtab],
+							    strsz,
+							    ELF_T_BYTE);
+		    if (mod->symstrdata == NULL)
+		      mod->symdata = NULL;
+		  }
+		if (mod->symdata == NULL)
+		  mod->symerr = DWFL_E (LIBELF, elf_errno ());
+		else
+		  {
+		    mod->symfile = &mod->main;
+		    mod->symerr = DWFL_E_NOERROR;
+		  }
+	      }
+	  }
 
-	  if (mod->syments > 0)
+	  /* First try unadjusted, like ELF files from disk, vdso.
+	     Then try for already adjusted dynamic section, like ELF
+	     from remote memory.  */
+	  translate_offs (0);
+	  if (mod->symfile == NULL)
+	    translate_offs (mod->main_bias);
+
+	  return;
+	}
+    }
+}
+
+
+#if USE_LZMA
+/* Try to find the offset between the main file and .gnu_debugdata.  */
+static bool
+find_aux_address_sync (Dwfl_Module *mod)
+{
+  /* Don't trust the phdrs in the minisymtab elf file to be setup correctly.
+     The address_sync is equal to the main file it is embedded in at first.  */
+  mod->aux_sym.address_sync = mod->main.address_sync;
+
+  /* Adjust address_sync for the difference in entry addresses, attempting to
+     account for ELF relocation changes after aux was split.  */
+  GElf_Ehdr ehdr_main, ehdr_aux;
+  if (unlikely (gelf_getehdr (mod->main.elf, &ehdr_main) == NULL)
+      || unlikely (gelf_getehdr (mod->aux_sym.elf, &ehdr_aux) == NULL))
+    return false;
+  mod->aux_sym.address_sync += ehdr_aux.e_entry - ehdr_main.e_entry;
+
+  /* The shdrs are setup OK to make find_prelink_address_sync () do the right
+     thing, which is possibly more reliable, but it needs .gnu.prelink_undo.  */
+  if (mod->aux_sym.address_sync != 0)
+    return find_prelink_address_sync (mod, &mod->aux_sym) == DWFL_E_NOERROR;
+
+  return true;
+}
+#endif
+
+/* Try to find the auxiliary symbol table embedded in the main elf file
+   section .gnu_debugdata.  Only matters if the symbol information comes
+   from the main file dynsym.  No harm done if not found.  */
+static void
+find_aux_sym (Dwfl_Module *mod __attribute__ ((unused)),
+	      Elf_Scn **aux_symscn __attribute__ ((unused)),
+	      Elf_Scn **aux_xndxscn __attribute__ ((unused)),
+	      GElf_Word *aux_strshndx __attribute__ ((unused)))
+{
+  /* Since a .gnu_debugdata section is compressed using lzma don't do
+     anything unless we have support for that.  */
+#if USE_LZMA
+  Elf *elf = mod->main.elf;
+
+  size_t shstrndx;
+  if (elf_getshdrstrndx (elf, &shstrndx) < 0)
+    return;
+
+  Elf_Scn *scn = NULL;
+  while ((scn = elf_nextscn (elf, scn)) != NULL)
+    {
+      GElf_Shdr shdr_mem;
+      GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
+      if (shdr == NULL)
+	return;
+
+      const char *name = elf_strptr (elf, shstrndx, shdr->sh_name);
+      if (name == NULL)
+	return;
+
+      if (!strcmp (name, ".gnu_debugdata"))
+	break;
+    }
+
+  if (scn == NULL)
+    return;
+
+  /* Found the .gnu_debugdata section.  Uncompress the lzma image and
+     turn it into an ELF image.  */
+  Elf_Data *rawdata = elf_rawdata (scn, NULL);
+  if (rawdata == NULL)
+    return;
+
+  Dwfl_Error error;
+  void *buffer = NULL;
+  size_t size = 0;
+  error = __libdw_unlzma (-1, 0, rawdata->d_buf, rawdata->d_size,
+			  &buffer, &size);
+  if (error == DWFL_E_NOERROR)
+    {
+      if (unlikely (size == 0))
+	free (buffer);
+      else
+	{
+	  mod->aux_sym.elf = elf_memory (buffer, size);
+	  if (mod->aux_sym.elf == NULL)
+	    free (buffer);
+	  else
 	    {
-	      mod->symdata = elf_getdata_rawchunk (mod->main.elf,
-						   offs[i_symtab],
-						   gelf_fsize (mod->main.elf,
-							       ELF_T_SYM,
-							       mod->syments,
-							       EV_CURRENT),
-						   ELF_T_SYM);
-	      if (mod->symdata != NULL)
+	      mod->aux_sym.fd = -1;
+	      mod->aux_sym.elf->flags |= ELF_F_MALLOCED;
+	      if (open_elf (mod, &mod->aux_sym) != DWFL_E_NOERROR)
+		return;
+	      if (! find_aux_address_sync (mod))
 		{
-		  mod->symstrdata = elf_getdata_rawchunk (mod->main.elf,
-							  offs[i_strtab],
-							  strsz,
-							  ELF_T_BYTE);
-		  if (mod->symstrdata == NULL)
-		    mod->symdata = NULL;
+		  elf_end (mod->aux_sym.elf);
+		  mod->aux_sym.elf = NULL;
+		  return;
 		}
-	      if (mod->symdata == NULL)
-		mod->symerr = DWFL_E (LIBELF, elf_errno ());
-	      else
+
+	      /* So far, so good. Get minisymtab table data and cache it. */
+	      bool minisymtab = false;
+	      scn = NULL;
+	      while ((scn = elf_nextscn (mod->aux_sym.elf, scn)) != NULL)
 		{
-		  mod->symfile = &mod->main;
-		  mod->symerr = DWFL_E_NOERROR;
+		  GElf_Shdr shdr_mem, *shdr = gelf_getshdr (scn, &shdr_mem);
+		  if (shdr != NULL)
+		    switch (shdr->sh_type)
+		      {
+		      case SHT_SYMTAB:
+			minisymtab = true;
+			*aux_symscn = scn;
+			*aux_strshndx = shdr->sh_link;
+			mod->aux_syments = shdr->sh_size / shdr->sh_entsize;
+			mod->aux_first_global = shdr->sh_info;
+			if (*aux_xndxscn != NULL)
+			  return;
+			break;
+
+		      case SHT_SYMTAB_SHNDX:
+			*aux_xndxscn = scn;
+			if (minisymtab)
+			  return;
+			break;
+
+		      default:
+			break;
+		      }
 		}
+
+	      if (minisymtab)
+		/* We found one, though no SHT_SYMTAB_SHNDX to go with it.  */
+		return;
+
+	      /* We found no SHT_SYMTAB, so everything else is bogus.  */
+	      *aux_xndxscn = NULL;
+	      *aux_strshndx = 0;
+	      mod->aux_syments = 0;
+	      elf_end (mod->aux_sym.elf);
+	      mod->aux_sym.elf = NULL;
 	      return;
 	    }
 	}
     }
+  else
+    free (buffer);
+#endif
 }
 
 /* Try to find a symbol table in either MOD->main.elf or MOD->debug.elf.  */
 static void
 find_symtab (Dwfl_Module *mod)
 {
-  if (mod->symdata != NULL	/* Already done.  */
+  if (mod->symdata != NULL || mod->aux_symdata != NULL	/* Already done.  */
       || mod->symerr != DWFL_E_NOERROR) /* Cached previous failure.  */
     return;
 
@@ -845,11 +1012,10 @@ find_symtab (Dwfl_Module *mod)
   if (mod->symerr != DWFL_E_NOERROR)
     return;
 
-  mod->first_global = -1; /* Unknown, unless explicitly set by load_symtab.  */
-
   /* First see if the main ELF file has the debugging information.  */
   Elf_Scn *symscn = NULL, *xndxscn = NULL;
-  GElf_Word strshndx;
+  Elf_Scn *aux_symscn = NULL, *aux_xndxscn = NULL;
+  GElf_Word strshndx, aux_strshndx = 0;
   mod->symerr = load_symtab (&mod->main, &mod->symfile, &symscn,
 			     &xndxscn, &mod->syments, &mod->first_global,
 			     &strshndx);
@@ -889,6 +1055,9 @@ find_symtab (Dwfl_Module *mod)
 	  break;
 
 	case DWFL_E_NO_SYMTAB:
+	  /* There might be an auxiliary table.  */
+	  find_aux_sym (mod, &aux_symscn, &aux_xndxscn, &aux_strshndx);
+
 	  if (symscn != NULL)
 	    {
 	      /* We still have the dynamic symbol table.  */
@@ -896,6 +1065,13 @@ find_symtab (Dwfl_Module *mod)
 	      break;
 	    }
 
+	  if (aux_symscn != NULL)
+	    {
+	      /* We still have the auxiliary symbol table.  */
+	      mod->symerr = DWFL_E_NOERROR;
+	      goto aux_cache;
+	    }
+
 	  /* Last ditch, look for dynamic symbols without section headers.  */
 	  find_dynsym (mod);
 	  return;
@@ -908,14 +1084,14 @@ find_symtab (Dwfl_Module *mod)
     {
     elferr:
       mod->symerr = DWFL_E (LIBELF, elf_errno ());
-      return;
+      goto aux_cleanup; /* This cleans up some more and tries find_dynsym.  */
     }
 
   /* Cache the data; MOD->syments and MOD->first_global were set above.  */
 
   mod->symstrdata = elf_getdata (elf_getscn (mod->symfile->elf, strshndx),
 				 NULL);
-  if (mod->symstrdata == NULL)
+  if (mod->symstrdata == NULL || mod->symstrdata->d_buf == NULL)
     goto elferr;
 
   if (xndxscn == NULL)
@@ -923,13 +1099,63 @@ find_symtab (Dwfl_Module *mod)
   else
     {
       mod->symxndxdata = elf_getdata (xndxscn, NULL);
-      if (mod->symxndxdata == NULL)
+      if (mod->symxndxdata == NULL || mod->symxndxdata->d_buf == NULL)
 	goto elferr;
     }
 
   mod->symdata = elf_getdata (symscn, NULL);
-  if (mod->symdata == NULL)
+  if (mod->symdata == NULL || mod->symdata->d_buf == NULL)
+    goto elferr;
+
+  // Sanity check number of symbols.
+  GElf_Shdr shdr_mem, *shdr = gelf_getshdr (symscn, &shdr_mem);
+  if (mod->syments > mod->symdata->d_size / shdr->sh_entsize
+      || (size_t) mod->first_global > mod->syments)
     goto elferr;
+
+  /* Cache any auxiliary symbol info, when it fails, just ignore aux_sym.  */
+  if (aux_symscn != NULL)
+    {
+  aux_cache:
+      /* This does some sanity checks on the string table section.  */
+      if (elf_strptr (mod->aux_sym.elf, aux_strshndx, 0) == NULL)
+	{
+	aux_cleanup:
+	  mod->aux_syments = 0;
+	  elf_end (mod->aux_sym.elf);
+	  mod->aux_sym.elf = NULL;
+	  /* We thought we had something through shdrs, but it failed...
+	     Last ditch, look for dynamic symbols without section headers.  */
+	  find_dynsym (mod);
+	  return;
+	}
+
+      mod->aux_symstrdata = elf_getdata (elf_getscn (mod->aux_sym.elf,
+						     aux_strshndx),
+					 NULL);
+      if (mod->aux_symstrdata == NULL || mod->aux_symstrdata->d_buf == NULL)
+	goto aux_cleanup;
+
+      if (aux_xndxscn == NULL)
+	mod->aux_symxndxdata = NULL;
+      else
+	{
+	  mod->aux_symxndxdata = elf_getdata (aux_xndxscn, NULL);
+	  if (mod->aux_symxndxdata == NULL
+	      || mod->aux_symxndxdata->d_buf == NULL)
+	    goto aux_cleanup;
+	}
+
+      mod->aux_symdata = elf_getdata (aux_symscn, NULL);
+      if (mod->aux_symdata == NULL || mod->aux_symdata->d_buf == NULL)
+	goto aux_cleanup;
+
+      // Sanity check number of aux symbols.
+      shdr = gelf_getshdr (aux_symscn, &shdr_mem);
+      if (mod->aux_syments > mod->aux_symdata->d_size / shdr->sh_entsize
+	  || (size_t) mod->aux_first_global > mod->aux_syments)
+	goto aux_cleanup;
+    }
 }
 
 
@@ -1020,6 +1246,11 @@ find_dw (Dwfl_Module *mod)
     case DWFL_E_NOERROR:
       mod->debug.elf = mod->main.elf;
       mod->debug.address_sync = mod->main.address_sync;
+
+      /* The Dwarf might need an alt debug file, find that now after
+	 everything about the debug file has been setup (the
+	 find_debuginfo callback might need it).  */
+      find_debug_altlink (mod, mod->main.name);
       return;
 
     case DWFL_E_NO_DWARF:
@@ -1035,6 +1266,15 @@ find_dw (Dwfl_Module *mod)
     {
     case DWFL_E_NOERROR:
       mod->dwerr = load_dw (mod, &mod->debug);
+      if (mod->dwerr == DWFL_E_NOERROR)
+	{
+	  /* The Dwarf might need an alt debug file, find that now after
+	     everything about the debug file has been setup (the
+	     find_debuginfo callback might need it).  */
+	  find_debug_altlink (mod, mod->debug.name);
+	  return;
+	}
+
       break;
 
     case DWFL_E_CB:		/* The find_debuginfo hook failed.  */
@@ -1085,9 +1325,34 @@ dwfl_module_getsymtab (Dwfl_Module *mod)
 
   find_symtab (mod);
   if (mod->symerr == DWFL_E_NOERROR)
-    return mod->syments;
+    /* We will skip the auxiliary zero entry if there is another one.  */
+    return (mod->syments + mod->aux_syments
+	    - (mod->syments > 0 && mod->aux_syments > 0 ? 1 : 0));
 
   __libdwfl_seterrno (mod->symerr);
   return -1;
 }
 INTDEF (dwfl_module_getsymtab)
+
+int
+dwfl_module_getsymtab_first_global (Dwfl_Module *mod)
+{
+  if (mod == NULL)
+    return -1;
+
+  find_symtab (mod);
+  if (mod->symerr == DWFL_E_NOERROR)
+    {
+      /* All local symbols should come before all global symbols.  If
+	 we have an auxiliary table make sure all the main locals come
+	 first, then all aux locals, then all main globals and finally all
+	 aux globals.  And skip the auxiliary table zero undefined
+	 entry.  */
+      int skip_aux_zero = (mod->syments > 0 && mod->aux_syments > 0) ? 1 : 0;
+      return mod->first_global + mod->aux_first_global - skip_aux_zero;
+    }
+
+  __libdwfl_seterrno (mod->symerr);
+  return -1;
+}
+INTDEF (dwfl_module_getsymtab_first_global)
diff --git a/src/libdwfl/dwfl_module_getelf.c b/src/libdwfl/dwfl_module_getelf.c
index b4e4a2b7..f20fb042 100644
--- a/src/libdwfl/dwfl_module_getelf.c
+++ b/src/libdwfl/dwfl_module_getelf.c
@@ -1,51 +1,30 @@
 /* Find debugging and symbol information for a module in libdwfl.
    Copyright (C) 2009-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_module_getsrc.c b/src/libdwfl/dwfl_module_getsrc.c
index be03055e..f6d88390 100644
--- a/src/libdwfl/dwfl_module_getsrc.c
+++ b/src/libdwfl/dwfl_module_getsrc.c
@@ -1,51 +1,30 @@
 /* Find source location for PC address in module.
-   Copyright (C) 2005, 2008 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005, 2008, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/libdwP.h"
@@ -63,32 +42,35 @@ dwfl_module_getsrc (Dwfl_Module *mod, Dwarf_Addr addr)
     error = __libdwfl_cu_getsrclines (cu);
   if (likely (error == DWFL_E_NOERROR))
     {
-      /* Now we look at the module-relative address.  */
-      addr -= bias;
-
-      /* The lines are sorted by address, so we can use binary search.  */
-      size_t l = 0, u = cu->die.cu->lines->nlines;
-      while (l < u)
+      Dwarf_Lines *lines = cu->die.cu->lines;
+      size_t nlines = lines->nlines;
+      if (nlines > 0)
 	{
-	  size_t idx = (l + u) / 2;
-	  if (addr < cu->die.cu->lines->info[idx].addr)
-	    u = idx;
-	  else if (addr > cu->die.cu->lines->info[idx].addr)
-	    l = idx + 1;
-	  else
-	    return &cu->lines->idx[idx];
-	}
+	  /* This is guaranteed for us by libdw read_srclines.  */
+	  assert(lines->info[nlines - 1].end_sequence);
 
-      if (cu->die.cu->lines->nlines > 0)
-	assert (cu->die.cu->lines->info
-		[cu->die.cu->lines->nlines - 1].end_sequence);
+	  /* Now we look at the module-relative address.  */
+	  addr -= bias;
 
-      /* If none were equal, the closest one below is what we want.
-	 We never want the last one, because it's the end-sequence
-	 marker with an address at the high bound of the CU's code.  */
-      if (u > 0 && u < cu->die.cu->lines->nlines
-	  && addr > cu->die.cu->lines->info[u - 1].addr)
-	return &cu->lines->idx[u - 1];
+	  /* The lines are sorted by address, so we can use binary search.  */
+	  size_t l = 0, u = nlines - 1;
+	  while (l < u)
+	    {
+	      size_t idx = u - (u - l) / 2;
+	      Dwarf_Line *line = &lines->info[idx];
+	      if (addr < line->addr)
+		u = idx - 1;
+	      else
+		l = idx;
+	    }
+
+	  /* The last line which is less than or equal to addr is what we want,
+	     except with an end_sequence which can only be strictly equal.  */
+	  Dwarf_Line *line = &lines->info[l];
+	  if (line->addr == addr
+	      || (! line->end_sequence && line->addr < addr))
+	    return &cu->lines->idx[l];
+	}
 
       error = DWFL_E_ADDR_OUTOFRANGE;
     }
diff --git a/src/libdwfl/dwfl_module_getsrc_file.c b/src/libdwfl/dwfl_module_getsrc_file.c
index 9d0c786b..20aa8a5f 100644
--- a/src/libdwfl/dwfl_module_getsrc_file.c
+++ b/src/libdwfl/dwfl_module_getsrc_file.c
@@ -1,51 +1,30 @@
 /* Find matching source locations in a module.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/libdwP.h"
diff --git a/src/libdwfl/dwfl_module_getsym.c b/src/libdwfl/dwfl_module_getsym.c
index 6bc063bb..42d2b679 100644
--- a/src/libdwfl/dwfl_module_getsym.c
+++ b/src/libdwfl/dwfl_module_getsym.c
@@ -1,57 +1,38 @@
 /* Find debugging and symbol information for a module in libdwfl.
-   Copyright (C) 2006-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2006-2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
 const char *
-dwfl_module_getsym (Dwfl_Module *mod, int ndx,
-		    GElf_Sym *sym, GElf_Word *shndxp)
+internal_function
+__libdwfl_getsym (Dwfl_Module *mod, int ndx, GElf_Sym *sym, GElf_Addr *addr,
+		  GElf_Word *shndxp, Elf **elfp, Dwarf_Addr *biasp,
+		  bool *resolved, bool adjust_st_value)
 {
   if (unlikely (mod == NULL))
     return NULL;
@@ -63,8 +44,56 @@ dwfl_module_getsym (Dwfl_Module *mod, int ndx,
 	return NULL;
     }
 
+  /* All local symbols should come before all global symbols.  If we
+     have an auxiliary table make sure all the main locals come first,
+     then all aux locals, then all main globals and finally all aux globals.
+     And skip the auxiliary table zero undefined entry.  */
   GElf_Word shndx;
-  sym = gelf_getsymshndx (mod->symdata, mod->symxndxdata, ndx, sym, &shndx);
+  int tndx = ndx;
+  int skip_aux_zero = (mod->syments > 0 && mod->aux_syments > 0) ? 1 : 0;
+  Elf *elf;
+  Elf_Data *symdata;
+  Elf_Data *symxndxdata;
+  Elf_Data *symstrdata;
+  if (mod->aux_symdata == NULL
+      || ndx < mod->first_global)
+    {
+      /* main symbol table (locals).  */
+      tndx = ndx;
+      elf = mod->symfile->elf;
+      symdata = mod->symdata;
+      symxndxdata = mod->symxndxdata;
+      symstrdata = mod->symstrdata;
+    }
+  else if (ndx < mod->first_global + mod->aux_first_global - skip_aux_zero)
+    {
+      /* aux symbol table (locals).  */
+      tndx = ndx - mod->first_global + skip_aux_zero;
+      elf = mod->aux_sym.elf;
+      symdata = mod->aux_symdata;
+      symxndxdata = mod->aux_symxndxdata;
+      symstrdata = mod->aux_symstrdata;
+    }
+  else if ((size_t) ndx < mod->syments + mod->aux_first_global - skip_aux_zero)
+    {
+      /* main symbol table (globals).  */
+      tndx = ndx - mod->aux_first_global + skip_aux_zero;
+      elf = mod->symfile->elf;
+      symdata = mod->symdata;
+      symxndxdata = mod->symxndxdata;
+      symstrdata = mod->symstrdata;
+    }
+  else
+    {
+      /* aux symbol table (globals).  */
+      tndx = ndx - mod->syments + skip_aux_zero;
+      elf = mod->aux_sym.elf;
+      symdata = mod->aux_symdata;
+      symxndxdata = mod->aux_symxndxdata;
+      symstrdata = mod->aux_symstrdata;
+    }
+  sym = gelf_getsymshndx (symdata, symxndxdata, tndx, sym, &shndx);
+
   if (unlikely (sym == NULL))
     {
       __libdwfl_seterrno (DWFL_E_LIBELF);
@@ -81,11 +110,37 @@ dwfl_module_getsym (Dwfl_Module *mod, int ndx,
 	  || (sym->st_shndx < SHN_LORESERVE && sym->st_shndx != SHN_UNDEF)))
     {
       GElf_Shdr shdr_mem;
-      GElf_Shdr *shdr = gelf_getshdr (elf_getscn (mod->symfile->elf, shndx),
-				      &shdr_mem);
+      GElf_Shdr *shdr = gelf_getshdr (elf_getscn (elf, shndx), &shdr_mem);
       alloc = unlikely (shdr == NULL) || (shdr->sh_flags & SHF_ALLOC);
     }
 
+  /* In case of an value in an allocated section the main Elf Ebl
+     might know where the real value is (e.g. for function
+     descriptors).  */
+
+  char *ident;
+  GElf_Addr st_value = sym->st_value & ebl_func_addr_mask (mod->ebl);
+  *resolved = false;
+  if (! adjust_st_value && mod->e_type != ET_REL && alloc
+      && (GELF_ST_TYPE (sym->st_info) == STT_FUNC
+	  || (GELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
+	      && (ident = elf_getident (elf, NULL)) != NULL
+	      && ident[EI_OSABI] == ELFOSABI_LINUX)))
+    {
+      if (likely (__libdwfl_module_getebl (mod) == DWFL_E_NOERROR))
+	{
+	  if (elf != mod->main.elf)
+	    {
+	      st_value = dwfl_adjusted_st_value (mod, elf, st_value);
+	      st_value = dwfl_deadjust_st_value (mod, mod->main.elf, st_value);
+	    }
+
+	  *resolved = ebl_resolve_sym_value (mod->ebl, &st_value);
+	  if (! *resolved)
+	    st_value = sym->st_value;
+	}
+    }
+
   if (shndxp != NULL)
     /* Yield -1 in case of a non-SHF_ALLOC section.  */
     *shndxp = alloc ? shndx : (GElf_Word) -1;
@@ -103,9 +158,9 @@ dwfl_module_getsym (Dwfl_Module *mod, int ndx,
 	  /* In an ET_REL file, the symbol table values are relative
 	     to the section, not to the module's load base.  */
 	  size_t symshstrndx = SHN_UNDEF;
-	  Dwfl_Error result = __libdwfl_relocate_value (mod, mod->symfile->elf,
+	  Dwfl_Error result = __libdwfl_relocate_value (mod, elf,
 							&symshstrndx,
-							shndx, &sym->st_value);
+							shndx, &st_value);
 	  if (unlikely (result != DWFL_E_NOERROR))
 	    {
 	      __libdwfl_seterrno (result);
@@ -114,15 +169,48 @@ dwfl_module_getsym (Dwfl_Module *mod, int ndx,
 	}
       else if (alloc)
 	/* Apply the bias to the symbol value.  */
-	sym->st_value = dwfl_adjusted_st_value (mod, sym->st_value);
+	st_value = dwfl_adjusted_st_value (mod,
+					   *resolved ? mod->main.elf : elf,
+					   st_value);
       break;
     }
 
-  if (unlikely (sym->st_name >= mod->symstrdata->d_size))
+  if (adjust_st_value)
+    sym->st_value = st_value;
+
+  if (addr != NULL)
+    *addr = st_value;
+
+  if (unlikely (sym->st_name >= symstrdata->d_size))
     {
       __libdwfl_seterrno (DWFL_E_BADSTROFF);
       return NULL;
     }
-  return (const char *) mod->symstrdata->d_buf + sym->st_name;
+  if (elfp)
+    *elfp = elf;
+  if (biasp)
+    *biasp = dwfl_adjusted_st_value (mod, elf, 0);
+  return (const char *) symstrdata->d_buf + sym->st_name;
+}
+
+const char *
+dwfl_module_getsym_info (Dwfl_Module *mod, int ndx,
+			 GElf_Sym *sym, GElf_Addr *addr,
+			 GElf_Word *shndxp,
+			 Elf **elfp, Dwarf_Addr *bias)
+{
+  bool resolved;
+  return __libdwfl_getsym (mod, ndx, sym, addr, shndxp, elfp, bias,
+			   &resolved, false);
+}
+INTDEF (dwfl_module_getsym_info)
+
+const char *
+dwfl_module_getsym (Dwfl_Module *mod, int ndx,
+		    GElf_Sym *sym, GElf_Word *shndxp)
+{
+  bool resolved;
+  return __libdwfl_getsym (mod, ndx, sym, NULL, shndxp, NULL, NULL,
+			   &resolved, true);
 }
 INTDEF (dwfl_module_getsym)
diff --git a/src/libdwfl/dwfl_module_info.c b/src/libdwfl/dwfl_module_info.c
index bfde6fc1..df16be41 100644
--- a/src/libdwfl/dwfl_module_info.c
+++ b/src/libdwfl/dwfl_module_info.c
@@ -1,51 +1,30 @@
 /* Return information about a module.
    Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
@@ -70,7 +49,7 @@ dwfl_module_info (Dwfl_Module *mod, void ***userdata,
 	       : dwfl_adjusted_dwarf_addr (mod, 0));
   if (symbias)
     *symbias = (mod->symfile == NULL ? (Dwarf_Addr) -1
-		: dwfl_adjusted_st_value (mod, 0));
+		: dwfl_adjusted_st_value (mod, mod->symfile->elf, 0));
 
   if (mainfile)
     *mainfile = mod->main.name;
diff --git a/src/libdwfl/dwfl_module_nextcu.c b/src/libdwfl/dwfl_module_nextcu.c
index 1b37d299..6f81f4cc 100644
--- a/src/libdwfl/dwfl_module_nextcu.c
+++ b/src/libdwfl/dwfl_module_nextcu.c
@@ -1,51 +1,30 @@
 /* Iterate through DWARF compilation units in a module.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_module_register_names.c b/src/libdwfl/dwfl_module_register_names.c
index 79a874a8..2da4b539 100644
--- a/src/libdwfl/dwfl_module_register_names.c
+++ b/src/libdwfl/dwfl_module_register_names.c
@@ -1,51 +1,30 @@
 /* Enumerate DWARF register numbers and their names.
    Copyright (C) 2005, 2006 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_module_report_build_id.c b/src/libdwfl/dwfl_module_report_build_id.c
index 9a1b14f7..b41512b4 100644
--- a/src/libdwfl/dwfl_module_report_build_id.c
+++ b/src/libdwfl/dwfl_module_report_build_id.c
@@ -1,51 +1,30 @@
 /* Report build ID information for a module.
    Copyright (C) 2007, 2008 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_module_return_value_location.c b/src/libdwfl/dwfl_module_return_value_location.c
index 3d5154e2..ad83cbf9 100644
--- a/src/libdwfl/dwfl_module_return_value_location.c
+++ b/src/libdwfl/dwfl_module_return_value_location.c
@@ -1,51 +1,30 @@
 /* Return location expression to find return value given a function type DIE.
    Copyright (C) 2005, 2006 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_nextcu.c b/src/libdwfl/dwfl_nextcu.c
index 90862d20..9ea83881 100644
--- a/src/libdwfl/dwfl_nextcu.c
+++ b/src/libdwfl/dwfl_nextcu.c
@@ -1,51 +1,30 @@
 /* Iterate through DWARF compilation units across all modules.
    Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_onesrcline.c b/src/libdwfl/dwfl_onesrcline.c
index 558d2408..4c20d657 100644
--- a/src/libdwfl/dwfl_onesrcline.c
+++ b/src/libdwfl/dwfl_onesrcline.c
@@ -1,51 +1,30 @@
 /* Return one of the sources lines of a CU.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_report_elf.c b/src/libdwfl/dwfl_report_elf.c
index 4c4132b1..3a4ae2ef 100644
--- a/src/libdwfl/dwfl_report_elf.c
+++ b/src/libdwfl/dwfl_report_elf.c
@@ -1,51 +1,30 @@
 /* Report a module to libdwfl based on ELF program headers.
    Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <fcntl.h>
@@ -59,17 +38,20 @@
    rejiggering (see below).  */
 #define REL_MIN_ALIGN	((GElf_Xword) 0x100)
 
-Dwfl_Module *
+bool
 internal_function
-__libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
-		      int fd, Elf *elf, GElf_Addr base, bool sanity)
+__libdwfl_elf_address_range (Elf *elf, GElf_Addr base, bool add_p_vaddr,
+			     bool sanity, GElf_Addr *vaddrp,
+			     GElf_Addr *address_syncp, GElf_Addr *startp,
+			     GElf_Addr *endp, GElf_Addr *biasp,
+			     GElf_Half *e_typep)
 {
   GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
   if (ehdr == NULL)
     {
     elf_error:
       __libdwfl_seterrno (DWFL_E_LIBELF);
-      return NULL;
+      return false;
     }
 
   GElf_Addr vaddr = 0;
@@ -187,6 +169,7 @@ __libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
     case ET_CORE:
       /* An assigned base address is meaningless for these.  */
       base = 0;
+      add_p_vaddr = true;
 
     case ET_DYN:
     default:;
@@ -202,13 +185,19 @@ __libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
 	    {
 	      vaddr = ph->p_vaddr & -ph->p_align;
 	      address_sync = ph->p_vaddr + ph->p_memsz;
-	      if ((base & (ph->p_align - 1)) != 0)
-		base = (base + ph->p_align - 1) & -ph->p_align;
-	      start = base + (ph->p_vaddr & -ph->p_align);
 	      break;
 	    }
 	}
-      bias = start - vaddr;
+      if (add_p_vaddr)
+	{
+	  start = base + vaddr;
+	  bias = base;
+	}
+      else
+	{
+	  start = base;
+	  bias = base - vaddr;
+	}
 
       for (size_t i = phnum; i-- > 0;)
 	{
@@ -218,7 +207,7 @@ __libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
 	  if (ph->p_type == PT_LOAD
 	      && ph->p_vaddr + ph->p_memsz > 0)
 	    {
-	      end = base + (ph->p_vaddr + ph->p_memsz);
+	      end = bias + (ph->p_vaddr + ph->p_memsz);
 	      break;
 	    }
 	}
@@ -226,11 +215,37 @@ __libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
       if (end == 0 && sanity)
 	{
 	  __libdwfl_seterrno (DWFL_E_NO_PHDR);
-	  return NULL;
+	  return false;
 	}
       break;
     }
+  if (vaddrp)
+    *vaddrp = vaddr;
+  if (address_syncp)
+    *address_syncp = address_sync;
+  if (startp)
+    *startp = start;
+  if (endp)
+    *endp = end;
+  if (biasp)
+    *biasp = bias;
+  if (e_typep)
+    *e_typep = ehdr->e_type;
+  return true;
+}
 
+Dwfl_Module *
+internal_function
+__libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
+		      int fd, Elf *elf, GElf_Addr base, bool add_p_vaddr,
+		      bool sanity)
+{
+  GElf_Addr vaddr, address_sync, start, end, bias;
+  GElf_Half e_type;
+  if (! __libdwfl_elf_address_range (elf, base, add_p_vaddr, sanity, &vaddr,
+				     &address_sync, &start, &end, &bias,
+				     &e_type))
+    return NULL;
   Dwfl_Module *m = INTUSE(dwfl_report_module) (dwfl, name, start, end);
   if (m != NULL)
     {
@@ -255,7 +270,7 @@ __libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
 	  m->main.vaddr = vaddr;
 	  m->main.address_sync = address_sync;
 	  m->main_bias = bias;
-	  m->e_type = ehdr->e_type;
+	  m->e_type = e_type;
 	}
       else
 	{
@@ -269,8 +284,8 @@ __libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
 }
 
 Dwfl_Module *
-dwfl_report_elf (Dwfl *dwfl, const char *name,
-		 const char *file_name, int fd, GElf_Addr base)
+dwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name, int fd,
+		 GElf_Addr base, bool add_p_vaddr)
 {
   bool closefd = false;
   if (fd < 0)
@@ -293,7 +308,7 @@ dwfl_report_elf (Dwfl *dwfl, const char *name,
     }
 
   Dwfl_Module *mod = __libdwfl_report_elf (dwfl, name, file_name,
-					   fd, elf, base, true);
+					   fd, elf, base, add_p_vaddr, true);
   if (mod == NULL)
     {
       elf_end (elf);
@@ -304,3 +319,20 @@ dwfl_report_elf (Dwfl *dwfl, const char *name,
   return mod;
 }
 INTDEF (dwfl_report_elf)
+NEW_VERSION (dwfl_report_elf, ELFUTILS_0.156)
+
+#ifdef SHARED
+Dwfl_Module *
+  _compat_without_add_p_vaddr_dwfl_report_elf (Dwfl *dwfl, const char *name,
+					       const char *file_name, int fd,
+					       GElf_Addr base);
+COMPAT_VERSION_NEWPROTO (dwfl_report_elf, ELFUTILS_0.122, without_add_p_vaddr)
+
+Dwfl_Module *
+_compat_without_add_p_vaddr_dwfl_report_elf (Dwfl *dwfl, const char *name,
+					     const char *file_name, int fd,
+					     GElf_Addr base)
+{
+  return dwfl_report_elf (dwfl, name, file_name, fd, base, true);
+}
+#endif
diff --git a/src/libdwfl/dwfl_segment_report_module.c b/src/libdwfl/dwfl_segment_report_module.c
index 012a0fde..898457f1 100644
--- a/src/libdwfl/dwfl_segment_report_module.c
+++ b/src/libdwfl/dwfl_segment_report_module.c
@@ -1,56 +1,36 @@
 /* Sniff out modules from ELF headers visible in memory segments.
-   Copyright (C) 2008-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2008-2012, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 #include "../libelf/libelfP.h"	/* For NOTE_ALIGN.  */
 #undef	_
 #include "libdwflP.h"
+#include "common.h"
 
 #include <elf.h>
 #include <gelf.h>
@@ -58,6 +38,8 @@
 #include <sys/param.h>
 #include <alloca.h>
 #include <endian.h>
+#include <unistd.h>
+#include <fcntl.h>
 
 
 /* A good size for the initial read from memory, if it's not too costly.
@@ -99,12 +81,165 @@ addr_segndx (Dwfl *dwfl, size_t segment, GElf_Addr addr, bool next)
   return ndx;
 }
 
+/* Return whether there is SZ bytes available at PTR till END.  */
+
+static bool
+buf_has_data (const void *ptr, const void *end, size_t sz)
+{
+  return ptr < end && (size_t) (end - ptr) >= sz;
+}
+
+/* Read SZ bytes into *RETP from *PTRP (limited by END) in format EI_DATA.
+   Function comes from src/readelf.c .  */
+
+static bool
+buf_read_ulong (unsigned char ei_data, size_t sz,
+		const void **ptrp, const void *end, uint64_t *retp)
+{
+  if (! buf_has_data (*ptrp, end, sz))
+    return false;
+
+  union
+  {
+    uint64_t u64;
+    uint32_t u32;
+  } u;
+
+  memcpy (&u, *ptrp, sz);
+  (*ptrp) += sz;
+
+  if (retp == NULL)
+    return true;
+
+  if (MY_ELFDATA != ei_data)
+    {
+      if (sz == 4)
+	CONVERT (u.u32);
+      else
+	CONVERT (u.u64);
+    }
+  if (sz == 4)
+    *retp = u.u32;
+  else
+    *retp = u.u64;
+  return true;
+}
+
+/* Try to find matching entry for module from address MODULE_START to
+   MODULE_END in NT_FILE note located at NOTE_FILE of NOTE_FILE_SIZE
+   bytes in format EI_CLASS and EI_DATA.  */
+
+static const char *
+handle_file_note (GElf_Addr module_start, GElf_Addr module_end,
+		  unsigned char ei_class, unsigned char ei_data,
+		  const void *note_file, size_t note_file_size)
+{
+  if (note_file == NULL)
+    return NULL;
+
+  size_t sz;
+  switch (ei_class)
+    {
+    case ELFCLASS32:
+      sz = 4;
+      break;
+    case ELFCLASS64:
+      sz = 8;
+      break;
+    default:
+      return NULL;
+    }
+
+  const void *ptr = note_file;
+  const void *end = note_file + note_file_size;
+  uint64_t count;
+  if (! buf_read_ulong (ei_data, sz, &ptr, end, &count))
+    return NULL;
+  if (! buf_read_ulong (ei_data, sz, &ptr, end, NULL)) // page_size
+    return NULL;
+
+  uint64_t maxcount = (size_t) (end - ptr) / (3 * sz);
+  if (count > maxcount)
+    return NULL;
+
+  /* Where file names are stored.  */
+  const char *fptr = ptr + 3 * count * sz;
+
+  ssize_t firstix = -1;
+  ssize_t lastix = -1;
+  for (size_t mix = 0; mix < count; mix++)
+    {
+      uint64_t mstart, mend, moffset;
+      if (! buf_read_ulong (ei_data, sz, &ptr, fptr, &mstart)
+	  || ! buf_read_ulong (ei_data, sz, &ptr, fptr, &mend)
+	  || ! buf_read_ulong (ei_data, sz, &ptr, fptr, &moffset))
+	return NULL;
+      if (mstart == module_start && moffset == 0)
+	firstix = lastix = mix;
+      if (firstix != -1 && mstart < module_end)
+	lastix = mix;
+      if (mend >= module_end)
+	break;
+    }
+  if (firstix == -1)
+    return NULL;
+
+  const char *retval = NULL;
+  for (ssize_t mix = 0; mix <= lastix; mix++)
+    {
+      const char *fnext = memchr (fptr, 0, (const char *) end - fptr);
+      if (fnext == NULL)
+	return NULL;
+      if (mix == firstix)
+	retval = fptr;
+      if (firstix < mix && mix <= lastix && strcmp (fptr, retval) != 0)
+	return NULL;
+      fptr = fnext + 1;
+    }
+  return retval;
+}
+
+/* Return true iff we are certain ELF cannot match BUILD_ID of
+   BUILD_ID_LEN bytes.  Pass DISK_FILE_HAS_BUILD_ID as false if it is
+   certain ELF does not contain build-id (it is only a performance hit
+   to pass it always as true).  */
+
+static bool
+invalid_elf (Elf *elf, bool disk_file_has_build_id,
+	     const void *build_id, size_t build_id_len)
+{
+  if (! disk_file_has_build_id && build_id_len > 0)
+    {
+      /* Module found in segments with build-id is more reliable
+	 than a module found via DT_DEBUG on disk without any
+	 build-id.   */
+      return true;
+    }
+  if (disk_file_has_build_id && build_id_len > 0)
+    {
+      const void *elf_build_id;
+      ssize_t elf_build_id_len;
+
+      /* If there is a build id in the elf file, check it.  */
+      elf_build_id_len = INTUSE(dwelf_elf_gnu_build_id) (elf, &elf_build_id);
+      if (elf_build_id_len > 0)
+	{
+	  if (build_id_len != (size_t) elf_build_id_len
+	      || memcmp (build_id, elf_build_id, build_id_len) != 0)
+	    return true;
+	}
+    }
+  return false;
+}
+
 int
 dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 			    Dwfl_Memory_Callback *memory_callback,
 			    void *memory_callback_arg,
 			    Dwfl_Module_Callback *read_eagerly,
-			    void *read_eagerly_arg)
+			    void *read_eagerly_arg,
+			    const void *note_file, size_t note_file_size,
+			    const struct r_debug_info *r_debug_info)
 {
   size_t segment = ndx;
 
@@ -140,10 +275,16 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 
   void *buffer = NULL;
   size_t buffer_available = INITIAL_READ;
+  Elf *elf = NULL;
+  int fd = -1;
 
   inline int finish (void)
   {
     release_buffer (&buffer, &buffer_available);
+    if (elf != NULL)
+      elf_end (elf);
+    if (fd != -1)
+      close (fd);
     return ndx;
   }
 
@@ -155,7 +296,11 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
   inline bool read_portion (void **data, size_t *data_size,
 			    GElf_Addr vaddr, size_t filesz)
   {
-    if (vaddr - start + filesz > buffer_available)
+    if (vaddr - start + filesz > buffer_available
+	/* If we're in string mode, then don't consider the buffer we have
+	   sufficient unless it contains the terminator of the string.  */
+	|| (filesz == 0 && memchr (vaddr - start + buffer, '\0',
+				   buffer_available - (vaddr - start)) == NULL))
       {
 	*data = NULL;
 	*data_size = filesz;
@@ -176,6 +321,10 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
   }
 
   /* Extract the information we need from the file header.  */
+  const unsigned char *e_ident;
+  unsigned char ei_class;
+  unsigned char ei_data;
+  uint16_t e_type;
   union
   {
     Elf32_Ehdr e32;
@@ -198,13 +347,16 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
       .d_size = sizeof ehdr,
       .d_version = EV_CURRENT,
     };
-  switch (((const unsigned char *) buffer)[EI_CLASS])
+  e_ident = ((const unsigned char *) buffer);
+  ei_class = e_ident[EI_CLASS];
+  ei_data = e_ident[EI_DATA];
+  switch (ei_class)
     {
     case ELFCLASS32:
       xlatefrom.d_size = sizeof (Elf32_Ehdr);
-      if (elf32_xlatetom (&xlateto, &xlatefrom,
-			  ((const unsigned char *) buffer)[EI_DATA]) == NULL)
+      if (elf32_xlatetom (&xlateto, &xlatefrom, ei_data) == NULL)
 	return finish ();
+      e_type = ehdr.e32.e_type;
       phoff = ehdr.e32.e_phoff;
       phnum = ehdr.e32.e_phnum;
       phentsize = ehdr.e32.e_phentsize;
@@ -215,9 +367,9 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 
     case ELFCLASS64:
       xlatefrom.d_size = sizeof (Elf64_Ehdr);
-      if (elf64_xlatetom (&xlateto, &xlatefrom,
-			  ((const unsigned char *) buffer)[EI_DATA]) == NULL)
+      if (elf64_xlatetom (&xlateto, &xlatefrom, ei_data) == NULL)
 	return finish ();
+      e_type = ehdr.e64.e_type;
       phoff = ehdr.e64.e_phoff;
       phnum = ehdr.e64.e_phnum;
       phentsize = ehdr.e64.e_phentsize;
@@ -296,7 +448,7 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
     assert (sizeof (Elf32_Nhdr) == sizeof (Elf64_Nhdr));
 
     void *notes;
-    if (ehdr.e32.e_ident[EI_DATA] == MY_ELFDATA)
+    if (ei_data == MY_ELFDATA)
       notes = data;
     else
       {
@@ -412,10 +564,9 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 	break;
       }
   }
-  if (ehdr.e32.e_ident[EI_CLASS] == ELFCLASS32)
+  if (ei_class == ELFCLASS32)
     {
-      if (elf32_xlatetom (&xlateto, &xlatefrom,
-			  ehdr.e32.e_ident[EI_DATA]) == NULL)
+      if (elf32_xlatetom (&xlateto, &xlatefrom, ei_data) == NULL)
 	found_bias = false;	/* Trigger error check.  */
       else
 	for (uint_fast16_t i = 0; i < phnum; ++i)
@@ -426,8 +577,7 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
     }
   else
     {
-      if (elf64_xlatetom (&xlateto, &xlatefrom,
-			  ehdr.e32.e_ident[EI_DATA]) == NULL)
+      if (elf64_xlatetom (&xlateto, &xlatefrom, ei_data) == NULL)
 	found_bias = false;	/* Trigger error check.  */
       else
 	for (uint_fast16_t i = 0; i < phnum; ++i)
@@ -442,7 +592,10 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
   /* We must have seen the segment covering offset 0, or else the ELF
      header we read at START was not produced by these program headers.  */
   if (unlikely (!found_bias))
-    return finish ();
+    {
+      free (build_id);
+      return finish ();
+    }
 
   /* Now we know enough to report a module for sure: its bounds.  */
   module_start += bias;
@@ -450,6 +603,95 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 
   dyn_vaddr += bias;
 
+  /* NAME found from link map has precedence over DT_SONAME possibly read
+     below.  */
+  bool name_is_final = false;
+
+  /* Try to match up DYN_VADDR against L_LD as found in link map.
+     Segments sniffing may guess invalid address as the first read-only memory
+     mapping may not be dumped to the core file (if ELF headers are not dumped)
+     and the ELF header is dumped first with the read/write mapping of the same
+     file at higher addresses.  */
+  if (r_debug_info != NULL)
+    for (const struct r_debug_info_module *module = r_debug_info->module;
+	 module != NULL; module = module->next)
+      if (module_start <= module->l_ld && module->l_ld < module_end)
+	{
+	  /* L_LD read from link map must be right while DYN_VADDR is unsafe.
+	     Therefore subtract DYN_VADDR and add L_LD to get a possibly
+	     corrective displacement for all addresses computed so far.  */
+	  GElf_Addr fixup = module->l_ld - dyn_vaddr;
+	  if ((fixup & (dwfl->segment_align - 1)) == 0
+	      && module_start + fixup <= module->l_ld
+	      && module->l_ld < module_end + fixup)
+	    {
+	      module_start += fixup;
+	      module_end += fixup;
+	      dyn_vaddr += fixup;
+	      bias += fixup;
+	      if (module->name[0] != '\0')
+		{
+		  name = basename (module->name);
+		  name_is_final = true;
+		}
+	      break;
+	    }
+	}
+
+  if (r_debug_info != NULL)
+    {
+      bool skip_this_module = false;
+      for (struct r_debug_info_module *module = r_debug_info->module;
+	   module != NULL; module = module->next)
+	if ((module_end > module->start && module_start < module->end)
+	    || dyn_vaddr == module->l_ld)
+	  {
+	    if (module->elf != NULL
+	        && invalid_elf (module->elf, module->disk_file_has_build_id,
+				build_id, build_id_len))
+	      {
+		elf_end (module->elf);
+		close (module->fd);
+		module->elf = NULL;
+		module->fd = -1;
+	      }
+	    if (module->elf != NULL)
+	      {
+		/* Ignore this found module if it would conflict in address
+		   space with any already existing module of DWFL.  */
+		skip_this_module = true;
+	      }
+	  }
+      if (skip_this_module)
+	{
+	  free (build_id);
+	  return finish ();
+	}
+    }
+
+  const char *file_note_name = handle_file_note (module_start, module_end,
+						 ei_class, ei_data,
+						 note_file, note_file_size);
+  if (file_note_name)
+    {
+      name = file_note_name;
+      name_is_final = true;
+      bool invalid = false;
+      fd = open64 (name, O_RDONLY);
+      if (fd >= 0)
+	{
+	  Dwfl_Error error = __libdw_open_file (&fd, &elf, true, false);
+	  if (error == DWFL_E_NOERROR)
+	    invalid = invalid_elf (elf, true /* disk_file_has_build_id */,
+				   build_id, build_id_len);
+	}
+      if (invalid)
+	{
+	  free (build_id);
+	  return finish ();
+	}
+    }
+
   /* Our return value now says to skip the segments contained
      within the module.  */
   ndx = addr_segndx (dwfl, segment, module_end, true);
@@ -491,7 +733,7 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
     return soname_stroff != 0 && dynstr_vaddr != 0 && dynstrsz != 0;
   }
 
-  const size_t dyn_entsize = (ehdr.e32.e_ident[EI_CLASS] == ELFCLASS32
+  const size_t dyn_entsize = (ei_class == ELFCLASS32
 			      ? sizeof (Elf32_Dyn) : sizeof (Elf64_Dyn));
   void *dyn_data = NULL;
   size_t dyn_data_size = 0;
@@ -510,18 +752,16 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
       xlateto.d_buf = &dyn;
       xlateto.d_size = sizeof dyn;
 
-      if (ehdr.e32.e_ident[EI_CLASS] == ELFCLASS32)
+      if (ei_class == ELFCLASS32)
 	{
-	  if (elf32_xlatetom (&xlateto, &xlatefrom,
-			      ehdr.e32.e_ident[EI_DATA]) != NULL)
+	  if (elf32_xlatetom (&xlateto, &xlatefrom, ei_data) != NULL)
 	    for (size_t i = 0; i < dyn_filesz / sizeof dyn.d32[0]; ++i)
 	      if (consider_dyn (dyn.d32[i].d_tag, dyn.d32[i].d_un.d_val))
 		break;
 	}
       else
 	{
-	  if (elf64_xlatetom (&xlateto, &xlatefrom,
-			      ehdr.e32.e_ident[EI_DATA]) != NULL)
+	  if (elf64_xlatetom (&xlateto, &xlatefrom, ei_data) != NULL)
 	    for (size_t i = 0; i < dyn_filesz / sizeof dyn.d64[0]; ++i)
 	      if (consider_dyn (dyn.d64[i].d_tag, dyn.d64[i].d_un.d_val))
 		break;
@@ -531,11 +771,11 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 
   /* We'll use the name passed in or a stupid default if not DT_SONAME.  */
   if (name == NULL)
-    name = ehdr.e32.e_type == ET_EXEC ? "[exe]" : execlike ? "[pie]" : "[dso]";
+    name = e_type == ET_EXEC ? "[exe]" : execlike ? "[pie]" : "[dso]";
 
   void *soname = NULL;
   size_t soname_size = 0;
-  if (dynstrsz != 0 && dynstr_vaddr != 0)
+  if (! name_is_final && dynstrsz != 0 && dynstr_vaddr != 0)
     {
       /* We know the bounds of the .dynstr section.
 
@@ -569,6 +809,12 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 
   Dwfl_Module *mod = INTUSE(dwfl_report_module) (dwfl, name,
 						 module_start, module_end);
+
+  // !execlike && ET_EXEC is PIE.
+  // execlike && !ET_EXEC is a static executable.
+  if (mod != NULL && (execlike || ehdr.e32.e_type == ET_EXEC))
+    mod->is_executable = true;
+
   if (likely (mod != NULL) && build_id != NULL
       && unlikely (INTUSE(dwfl_module_report_build_id) (mod,
 							build_id,
@@ -600,10 +846,10 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 			       : dynstr_vaddr + dynstrsz - start);
   const GElf_Off whole = MAX (file_trimmed_end, shdrs_end);
 
-  Elf *elf = NULL;
-  if ((*read_eagerly) (MODCB_ARGS (mod), &buffer, &buffer_available,
-		       cost, worthwhile, whole, contiguous,
-		       read_eagerly_arg, &elf)
+  if (elf == NULL
+      && (*read_eagerly) (MODCB_ARGS (mod), &buffer, &buffer_available,
+			  cost, worthwhile, whole, contiguous,
+			  read_eagerly_arg, &elf)
       && elf == NULL)
     {
       /* The caller wants to read the whole file in right now, but hasn't
@@ -633,7 +879,7 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 	      final_read (offset, vaddr + bias, filesz);
 	  }
 
-	  if (ehdr.e32.e_ident[EI_CLASS] == ELFCLASS32)
+	  if (ei_class == ELFCLASS32)
 	    for (uint_fast16_t i = 0; i < phnum; ++i)
 	      read_phdr (phdrs.p32[i].p_type, phdrs.p32[i].p_vaddr,
 			 phdrs.p32[i].p_offset, phdrs.p32[i].p_filesz);
@@ -665,8 +911,11 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
     {
       /* Install the file in the module.  */
       mod->main.elf = elf;
+      elf = NULL;
+      fd = -1;
       mod->main.vaddr = module_start - bias;
       mod->main.address_sync = module_address_sync;
+      mod->main_bias = bias;
     }
 
   return finish ();
diff --git a/src/libdwfl/dwfl_validate_address.c b/src/libdwfl/dwfl_validate_address.c
index 81073762..7334c3e2 100644
--- a/src/libdwfl/dwfl_validate_address.c
+++ b/src/libdwfl/dwfl_validate_address.c
@@ -1,51 +1,30 @@
 /* Validate an address and the relocatability of an offset from it.
    Copyright (C) 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/dwfl_version.c b/src/libdwfl/dwfl_version.c
index 9c7074c5..9673a536 100644
--- a/src/libdwfl/dwfl_version.c
+++ b/src/libdwfl/dwfl_version.c
@@ -1,51 +1,30 @@
 /* Return implementation's version string suitable for printing.
    Copyright (C) 2006, 2007 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
diff --git a/src/libdwfl/elf-from-memory.c b/src/libdwfl/elf-from-memory.c
index 0fb5f8a3..b35fac71 100644
--- a/src/libdwfl/elf-from-memory.c
+++ b/src/libdwfl/elf-from-memory.c
@@ -1,51 +1,30 @@
 /* Reconstruct an ELF file by reading the segments out of remote memory.
-   Copyright (C) 2005-2011 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2011, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 #include "../libelf/libelfP.h"
@@ -69,10 +48,14 @@
    MAXREAD bytes from the remote memory at target address ADDRESS into the
    local buffer at DATA; it should return -1 for errors (with code in
    `errno'), 0 if it failed to read at least MINREAD bytes due to EOF, or
-   the number of bytes read if >= MINREAD.  ARG is passed through.  */
+   the number of bytes read if >= MINREAD.  ARG is passed through.
+
+   PAGESIZE is the minimum page size and alignment used for the PT_LOAD
+   segments.  */
 
 Elf *
 elf_from_remote_memory (GElf_Addr ehdr_vma,
+			GElf_Xword pagesize,
 			GElf_Addr *loadbasep,
 			ssize_t (*read_memory) (void *arg, void *data,
 						GElf_Addr address,
@@ -104,6 +87,7 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
   if (memcmp (buffer, ELFMAG, SELFMAG) != 0)
     {
     bad_elf:
+      free (buffer);
       __libdwfl_seterrno (DWFL_E_BADELF);
       return NULL;
     }
@@ -212,25 +196,37 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
   /* Scan for PT_LOAD segments to find the total size of the file image.  */
   size_t contents_size = 0;
   GElf_Off segments_end = 0;
+  GElf_Off segments_end_mem = 0;
   GElf_Addr loadbase = ehdr_vma;
   bool found_base = false;
   switch (ehdr.e32.e_ident[EI_CLASS])
     {
-      inline void handle_segment (GElf_Addr vaddr, GElf_Off offset,
-				  GElf_Xword filesz, GElf_Xword align)
+      /* Sanity checks segments and calculates segment_end,
+	 segments_end, segments_end_mem and loadbase (if not
+	 found_base yet).  Returns true if sanity checking failed,
+	 false otherwise.  */
+      inline bool handle_segment (GElf_Addr vaddr, GElf_Off offset,
+				  GElf_Xword filesz, GElf_Xword memsz)
 	{
-	  GElf_Off segment_end = ((offset + filesz + align - 1) & -align);
+	  /* Sanity check the segment load aligns with the pagesize.  */
+	  if (((vaddr - offset) & (pagesize - 1)) != 0)
+	    return true;
+
+	  GElf_Off segment_end = ((offset + filesz + pagesize - 1)
+				  & -pagesize);
 
 	  if (segment_end > (GElf_Off) contents_size)
 	    contents_size = segment_end;
 
-	  if (!found_base && (offset & -align) == 0)
+	  if (!found_base && (offset & -pagesize) == 0)
 	    {
-	      loadbase = ehdr_vma - (vaddr & -align);
+	      loadbase = ehdr_vma - (vaddr & -pagesize);
 	      found_base = true;
 	    }
 
 	  segments_end = offset + filesz;
+	  segments_end_mem = offset + memsz;
+	  return false;
 	}
 
     case ELFCLASS32:
@@ -239,8 +235,9 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
 	goto libelf_error;
       for (uint_fast16_t i = 0; i < phnum; ++i)
 	if (phdrs.p32[i].p_type == PT_LOAD)
-	  handle_segment (phdrs.p32[i].p_vaddr, phdrs.p32[i].p_offset,
-			  phdrs.p32[i].p_filesz, phdrs.p32[i].p_align);
+	  if (handle_segment (phdrs.p32[i].p_vaddr, phdrs.p32[i].p_offset,
+			      phdrs.p32[i].p_filesz, phdrs.p32[i].p_memsz))
+	    goto bad_elf;
       break;
 
     case ELFCLASS64:
@@ -249,8 +246,9 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
 	goto libelf_error;
       for (uint_fast16_t i = 0; i < phnum; ++i)
 	if (phdrs.p64[i].p_type == PT_LOAD)
-	  handle_segment (phdrs.p64[i].p_vaddr, phdrs.p64[i].p_offset,
-			  phdrs.p64[i].p_filesz, phdrs.p64[i].p_align);
+	  if (handle_segment (phdrs.p64[i].p_vaddr, phdrs.p64[i].p_offset,
+			      phdrs.p64[i].p_filesz, phdrs.p64[i].p_memsz))
+	    goto bad_elf;
       break;
 
     default:
@@ -260,9 +258,11 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
 
   /* Trim the last segment so we don't bother with zeros in the last page
      that are off the end of the file.  However, if the extra bit in that
-     page includes the section headers, keep them.  */
+     page includes the section headers and the memory isn't extended (which
+     might indicate it will have been reused otherwise), keep them.  */
   if ((GElf_Off) contents_size > segments_end
-      && (GElf_Off) contents_size >= shdrs_end)
+      && (GElf_Off) contents_size >= shdrs_end
+      && segments_end == segments_end_mem)
     {
       contents_size = segments_end;
       if ((GElf_Off) contents_size < shdrs_end)
@@ -280,15 +280,17 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
 
   switch (ehdr.e32.e_ident[EI_CLASS])
     {
+      /* Reads the given segment.  Returns true if reading fails,
+	 false otherwise.  */
       inline bool handle_segment (GElf_Addr vaddr, GElf_Off offset,
-				  GElf_Xword filesz, GElf_Xword align)
+				  GElf_Xword filesz)
 	{
-	  GElf_Off start = offset & -align;
-	  GElf_Off end = (offset + filesz + align - 1) & -align;
+	  GElf_Off start = offset & -pagesize;
+	  GElf_Off end = (offset + filesz + pagesize - 1) & -pagesize;
 	  if (end > (GElf_Off) contents_size)
 	    end = contents_size;
 	  nread = (*read_memory) (arg, buffer + start,
-				  (loadbase + vaddr) & -align,
+				  (loadbase + vaddr) & -pagesize,
 				  end - start, end - start);
 	  return nread <= 0;
 	}
@@ -297,7 +299,7 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
       for (uint_fast16_t i = 0; i < phnum; ++i)
 	if (phdrs.p32[i].p_type == PT_LOAD)
 	  if (handle_segment (phdrs.p32[i].p_vaddr, phdrs.p32[i].p_offset,
-			      phdrs.p32[i].p_filesz, phdrs.p32[i].p_align))
+			      phdrs.p32[i].p_filesz))
 	    goto read_error;
 
       /* If the segments visible in memory didn't include the section
@@ -322,9 +324,9 @@ elf_from_remote_memory (GElf_Addr ehdr_vma,
 
     case ELFCLASS64:
       for (uint_fast16_t i = 0; i < phnum; ++i)
-	if (phdrs.p32[i].p_type == PT_LOAD)
+	if (phdrs.p64[i].p_type == PT_LOAD)
 	  if (handle_segment (phdrs.p64[i].p_vaddr, phdrs.p64[i].p_offset,
-			      phdrs.p64[i].p_filesz, phdrs.p64[i].p_align))
+			      phdrs.p64[i].p_filesz))
 	    goto read_error;
 
       /* If the segments visible in memory didn't include the section
diff --git a/src/libdwfl/find-debuginfo.c b/src/libdwfl/find-debuginfo.c
index 12cfe636..3f5314ad 100644
--- a/src/libdwfl/find-debuginfo.c
+++ b/src/libdwfl/find-debuginfo.c
@@ -1,51 +1,30 @@
 /* Standard find_debuginfo callback for libdwfl.
-   Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2010, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <stdio.h>
@@ -105,6 +84,45 @@ check_crc (int fd, GElf_Word debuglink_crc)
 static bool
 validate (Dwfl_Module *mod, int fd, bool check, GElf_Word debuglink_crc)
 {
+  /* For alt debug files always check the build-id from the Dwarf and alt.  */
+  if (mod->dw != NULL)
+    {
+      bool valid = false;
+      const void *build_id;
+      const char *altname;
+      ssize_t build_id_len = INTUSE(dwelf_dwarf_gnu_debugaltlink) (mod->dw,
+								   &altname,
+								   &build_id);
+      if (build_id_len > 0)
+	{
+	  /* We need to open an Elf handle on the file so we can check its
+	     build ID note for validation.  Backdoor the handle into the
+	     module data structure since we had to open it early anyway.  */
+	  Dwfl_Error error = __libdw_open_file (&fd, &mod->alt_elf,
+						false, false);
+	  if (error != DWFL_E_NOERROR)
+	    __libdwfl_seterrno (error);
+	  else
+	    {
+	      const void *alt_build_id;
+	      ssize_t alt_len = INTUSE(dwelf_elf_gnu_build_id) (mod->alt_elf,
+								&alt_build_id);
+	      if (alt_len > 0 && alt_len == build_id_len
+		  && memcmp (build_id, alt_build_id, alt_len) == 0)
+		valid = true;
+	      else
+		{
+		  /* A mismatch!  */
+		  elf_end (mod->alt_elf);
+		  mod->alt_elf = NULL;
+		  close (fd);
+		  fd = -1;
+		}
+	    }
+	}
+      return valid;
+    }
+
   /* If we have a build ID, check only that.  */
   if (mod->build_id_len > 0)
     {
@@ -145,7 +163,9 @@ find_debuginfo_in_path (Dwfl_Module *mod, const char *file_name,
   const char *file_basename = file_name == NULL ? NULL : basename (file_name);
   if (debuglink_file == NULL)
     {
-      if (file_basename == NULL)
+      /* For a alt debug multi file we need a name, for a separate debug
+	 name we may be able to fall back on file_basename.debug.  */
+      if (file_basename == NULL || mod->dw != NULL)
 	{
 	  errno = 0;
 	  return -1;
@@ -163,13 +183,8 @@ find_debuginfo_in_path (Dwfl_Module *mod, const char *file_name,
      indicated by the debug directory path setting.  */
 
   const Dwfl_Callbacks *const cb = mod->dwfl->callbacks;
-#if defined(__BIONIC__) || defined(__APPLE__)
-  char *path = strdup ((cb->debuginfo_path ? *cb->debuginfo_path : NULL)
-			?: DEFAULT_DEBUGINFO_PATH);
-#else
   char *path = strdupa ((cb->debuginfo_path ? *cb->debuginfo_path : NULL)
 			?: DEFAULT_DEBUGINFO_PATH);
-#endif
 
   /* A leading - or + in the whole path sets whether to check file CRCs.  */
   bool defcheck = true;
@@ -189,14 +204,8 @@ find_debuginfo_in_path (Dwfl_Module *mod, const char *file_name,
       main_stat.st_ino = 0;
     }
 
-#if defined(__BIONIC__) || defined(__APPLE__)
-  char *file_dirname = (file_basename == file_name ? NULL
-			: strndup (file_name, file_basename - 1 - file_name));
-#else
   char *file_dirname = (file_basename == file_name ? NULL
 			: strndupa (file_name, file_basename - 1 - file_name));
-#endif
-
   char *p;
   while ((p = strsep (&path, ":")) != NULL)
     {
@@ -206,53 +215,74 @@ find_debuginfo_in_path (Dwfl_Module *mod, const char *file_name,
 	check = *p++ == '+';
       check = check && cancheck;
 
-      const char *dir, *subdir;
+      const char *dir, *subdir, *file;
       switch (p[0])
 	{
 	case '\0':
 	  /* An empty entry says to try the main file's directory.  */
 	  dir = file_dirname;
 	  subdir = NULL;
+	  file = debuglink_file;
 	  break;
 	case '/':
 	  /* An absolute path says to look there for a subdirectory
-	     named by the main file's absolute directory.
-	     This cannot be applied to a relative file name.  */
-	  if (file_dirname == NULL || file_dirname[0] != '/')
+	     named by the main file's absolute directory.  This cannot
+	     be applied to a relative file name.  For alt debug files
+	     it means to look for the basename file in that dir or the
+	     .dwz subdir (see below).  */
+	  if (mod->dw == NULL
+	      && (file_dirname == NULL || file_dirname[0] != '/'))
 	    continue;
 	  dir = p;
-	  subdir = file_dirname + 1;
+	  if (mod->dw == NULL)
+	    {
+	      subdir = file_dirname + 1;
+	      file = debuglink_file;
+	    }
+	  else
+	    {
+	      subdir = NULL;
+	      file = basename (debuglink_file);
+	    }
 	  break;
 	default:
 	  /* A relative path says to try a subdirectory of that name
 	     in the main file's directory.  */
 	  dir = file_dirname;
 	  subdir = p;
+	  file = debuglink_file;
 	  break;
 	}
 
       char *fname = NULL;
-      int fd = try_open (&main_stat, dir, subdir, debuglink_file, &fname);
+      int fd = try_open (&main_stat, dir, subdir, file, &fname);
       if (fd < 0)
 	switch (errno)
 	  {
 	  case ENOENT:
 	  case ENOTDIR:
+	    /* If we are looking for the alt file also try the .dwz subdir.
+	       But only if this is the empty or absolute path.  */
+	    if (mod->dw != NULL && (p[0] == '\0' || p[0] == '/'))
+	      {
+		fd = try_open (&main_stat, dir, ".dwz",
+			       basename (file), &fname);
+		if (fd < 0)
+		  {
+		    if (errno != ENOENT && errno != ENOTDIR)
+		      return -1;
+		    else
+		      continue;
+		  }
+		break;
+	      }
 	    continue;
 	  default:
-#if defined(__BIONIC__) || defined(__APPLE__)
-            free(path);
-            free(file_dirname);
-#endif
 	    return -1;
 	  }
       if (validate (mod, fd, check, debuglink_crc))
 	{
 	  *debuginfo_file_name = fname;
-#if defined(__BIONIC__) || defined(__APPLE__)
-          free(path);
-          free(file_dirname);
-#endif
 	  return fd;
 	}
       free (fname);
@@ -261,10 +291,6 @@ find_debuginfo_in_path (Dwfl_Module *mod, const char *file_name,
 
   /* No dice.  */
   errno = 0;
-#if defined(__BIONIC__) || defined(__APPLE__)
-  free(path);
-  free(file_dirname);
-#endif
   return -1;
 }
 
@@ -284,11 +310,21 @@ dwfl_standard_find_debuginfo (Dwfl_Module *mod,
   GElf_Addr vaddr;
   if (INTUSE(dwfl_module_build_id) (mod, &bits, &vaddr) > 0)
     {
+      /* Dropping most arguments means we cannot rely on them in
+	 dwfl_build_id_find_debuginfo.  But leave it that way since
+	 some user code out there also does this, so we'll have to
+	 handle it anyway.  */
       int fd = INTUSE(dwfl_build_id_find_debuginfo) (mod,
 						     NULL, NULL, 0,
 						     NULL, NULL, 0,
 						     debuginfo_file_name);
-      if (fd >= 0 || mod->debug.elf != NULL || errno != 0)
+
+      /* Did the build_id callback find something or report an error?
+         Then we are done.  Otherwise fallback on path based search.  */
+      if (fd >= 0
+	  || (mod->dw == NULL && mod->debug.elf != NULL)
+	  || (mod->dw != NULL && mod->alt_elf != NULL)
+	  || errno != 0)
 	return fd;
     }
 
diff --git a/src/libdwfl/frame_unwind.c b/src/libdwfl/frame_unwind.c
new file mode 100644
index 00000000..16cebd08
--- /dev/null
+++ b/src/libdwfl/frame_unwind.c
@@ -0,0 +1,725 @@
+/* Get previous frame state for an existing frame state.
+   Copyright (C) 2013, 2014 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "cfi.h"
+#include <stdlib.h>
+#include "libdwflP.h"
+#include "../libdw/dwarf.h"
+#include <sys/ptrace.h>
+
+/* Maximum number of DWARF expression stack slots before returning an error.  */
+#define DWARF_EXPR_STACK_MAX 0x100
+
+/* Maximum number of DWARF expression executed operations before returning an
+   error.  */
+#define DWARF_EXPR_STEPS_MAX 0x1000
+
+#ifndef MAX
+# define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+bool
+internal_function
+__libdwfl_frame_reg_get (Dwfl_Frame *state, unsigned regno, Dwarf_Addr *val)
+{
+  Ebl *ebl = state->thread->process->ebl;
+  if (! ebl_dwarf_to_regno (ebl, &regno))
+    return false;
+  if (regno >= ebl_frame_nregs (ebl))
+    return false;
+  if ((state->regs_set[regno / sizeof (*state->regs_set) / 8]
+       & ((uint64_t) 1U << (regno % (sizeof (*state->regs_set) * 8)))) == 0)
+    return false;
+  if (val)
+    *val = state->regs[regno];
+  return true;
+}
+
+bool
+internal_function
+__libdwfl_frame_reg_set (Dwfl_Frame *state, unsigned regno, Dwarf_Addr val)
+{
+  Ebl *ebl = state->thread->process->ebl;
+  if (! ebl_dwarf_to_regno (ebl, &regno))
+    return false;
+  if (regno >= ebl_frame_nregs (ebl))
+    return false;
+  /* For example i386 user_regs_struct has signed fields.  */
+  if (ebl_get_elfclass (ebl) == ELFCLASS32)
+    val &= 0xffffffff;
+  state->regs_set[regno / sizeof (*state->regs_set) / 8] |=
+		((uint64_t) 1U << (regno % (sizeof (*state->regs_set) * 8)));
+  state->regs[regno] = val;
+  return true;
+}
+
+static bool
+state_get_reg (Dwfl_Frame *state, unsigned regno, Dwarf_Addr *val)
+{
+  if (! __libdwfl_frame_reg_get (state, regno, val))
+    {
+      __libdwfl_seterrno (DWFL_E_INVALID_REGISTER);
+      return false;
+    }
+  return true;
+}
+
+static int
+bra_compar (const void *key_voidp, const void *elem_voidp)
+{
+  Dwarf_Word offset = (uintptr_t) key_voidp;
+  const Dwarf_Op *op = elem_voidp;
+  return (offset > op->offset) - (offset < op->offset);
+}
+
+/* If FRAME is NULL is are computing CFI frame base.  In such case another
+   DW_OP_call_frame_cfa is no longer permitted.  */
+
+static bool
+expr_eval (Dwfl_Frame *state, Dwarf_Frame *frame, const Dwarf_Op *ops,
+	   size_t nops, Dwarf_Addr *result, Dwarf_Addr bias)
+{
+  Dwfl_Process *process = state->thread->process;
+  if (nops == 0)
+    {
+      __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+      return false;
+    }
+  Dwarf_Addr *stack = NULL;
+  size_t stack_used = 0, stack_allocated = 0;
+
+  bool
+  push (Dwarf_Addr val)
+  {
+    if (stack_used >= DWARF_EXPR_STACK_MAX)
+      {
+	__libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	return false;
+      }
+    if (stack_used == stack_allocated)
+      {
+	stack_allocated = MAX (stack_allocated * 2, 32);
+	Dwarf_Addr *stack_new = realloc (stack, stack_allocated * sizeof (*stack));
+	if (stack_new == NULL)
+	  {
+	    __libdwfl_seterrno (DWFL_E_NOMEM);
+	    return false;
+	  }
+	stack = stack_new;
+      }
+    stack[stack_used++] = val;
+    return true;
+  }
+
+  bool
+  pop (Dwarf_Addr *val)
+  {
+    if (stack_used == 0)
+      {
+	__libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	return false;
+      }
+    *val = stack[--stack_used];
+    return true;
+  }
+
+  Dwarf_Addr val1, val2;
+  bool is_location = false;
+  size_t steps_count = 0;
+  for (const Dwarf_Op *op = ops; op < ops + nops; op++)
+    {
+      if (++steps_count > DWARF_EXPR_STEPS_MAX)
+	{
+	  __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	  return false;
+	}
+      switch (op->atom)
+      {
+	/* DW_OP_* order matches libgcc/unwind-dw2.c execute_stack_op:  */
+	case DW_OP_lit0 ... DW_OP_lit31:
+	  if (! push (op->atom - DW_OP_lit0))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_addr:
+	  if (! push (op->number + bias))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_GNU_encoded_addr:
+	  /* Missing support in the rest of elfutils.  */
+	  __libdwfl_seterrno (DWFL_E_UNSUPPORTED_DWARF);
+	  return false;
+	case DW_OP_const1u:
+	case DW_OP_const1s:
+	case DW_OP_const2u:
+	case DW_OP_const2s:
+	case DW_OP_const4u:
+	case DW_OP_const4s:
+	case DW_OP_const8u:
+	case DW_OP_const8s:
+	case DW_OP_constu:
+	case DW_OP_consts:
+	  if (! push (op->number))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_reg0 ... DW_OP_reg31:
+	  if (! state_get_reg (state, op->atom - DW_OP_reg0, &val1)
+	      || ! push (val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_regx:
+	  if (! state_get_reg (state, op->number, &val1) || ! push (val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_breg0 ... DW_OP_breg31:
+	  if (! state_get_reg (state, op->atom - DW_OP_breg0, &val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  val1 += op->number;
+	  if (! push (val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_bregx:
+	  if (! state_get_reg (state, op->number, &val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  val1 += op->number2;
+	  if (! push (val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_dup:
+	  if (! pop (&val1) || ! push (val1) || ! push (val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_drop:
+	  if (! pop (&val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_pick:
+	  if (stack_used <= op->number)
+	    {
+	      free (stack);
+	      __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	      return false;
+	    }
+	  if (! push (stack[stack_used - 1 - op->number]))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_over:
+	  if (! pop (&val1) || ! pop (&val2)
+	      || ! push (val2) || ! push (val1) || ! push (val2))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_swap:
+	  if (! pop (&val1) || ! pop (&val2) || ! push (val1) || ! push (val2))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	case DW_OP_rot:
+	  {
+	    Dwarf_Addr val3;
+	    if (! pop (&val1) || ! pop (&val2) || ! pop (&val3)
+		|| ! push (val1) || ! push (val3) || ! push (val2))
+	      {
+		free (stack);
+		return false;
+	      }
+	  }
+	  break;
+	case DW_OP_deref:
+	case DW_OP_deref_size:
+	  if (process->callbacks->memory_read == NULL)
+	    {
+	      free (stack);
+	      __libdwfl_seterrno (DWFL_E_INVALID_ARGUMENT);
+	      return false;
+	    }
+	  if (! pop (&val1)
+	      || ! process->callbacks->memory_read (process->dwfl, val1, &val1,
+						    process->callbacks_arg))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  if (op->atom == DW_OP_deref_size)
+	    {
+	      const int elfclass = frame->cache->e_ident[EI_CLASS];
+	      const unsigned addr_bytes = elfclass == ELFCLASS32 ? 4 : 8;
+	      if (op->number > addr_bytes)
+		{
+		  free (stack);
+		  __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+		  return false;
+		}
+#if BYTE_ORDER == BIG_ENDIAN
+	      if (op->number == 0)
+		val1 = 0;
+	      else
+		val1 >>= (addr_bytes - op->number) * 8;
+#else
+	      if (op->number < 8)
+		val1 &= (1 << (op->number * 8)) - 1;
+#endif
+	    }
+	  if (! push (val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+#define UNOP(atom, expr)						\
+	case atom:							\
+	  if (! pop (&val1) || ! push (expr))				\
+	    {								\
+	      free (stack);						\
+	      return false;						\
+	    }								\
+	  break;
+	UNOP (DW_OP_abs, abs ((int64_t) val1))
+	UNOP (DW_OP_neg, -(int64_t) val1)
+	UNOP (DW_OP_not, ~val1)
+#undef UNOP
+	case DW_OP_plus_uconst:
+	  if (! pop (&val1) || ! push (val1 + op->number))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+#define BINOP(atom, op)							\
+	case atom:							\
+	  if (! pop (&val2) || ! pop (&val1) || ! push (val1 op val2))	\
+	    {								\
+	      free (stack);						\
+	      return false;						\
+	    }								\
+	  break;
+#define BINOP_SIGNED(atom, op)						\
+	case atom:							\
+	  if (! pop (&val2) || ! pop (&val1)				\
+	      || ! push ((int64_t) val1 op (int64_t) val2))		\
+	    {								\
+	      free (stack);						\
+	      return false;						\
+	    }								\
+	  break;
+	BINOP (DW_OP_and, &)
+	case DW_OP_div:
+	  if (! pop (&val2) || ! pop (&val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  if (val2 == 0)
+	    {
+	      free (stack);
+	      __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	      return false;
+	    }
+	  if (! push ((int64_t) val1 / (int64_t) val2))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	BINOP (DW_OP_minus, -)
+	case DW_OP_mod:
+	  if (! pop (&val2) || ! pop (&val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  if (val2 == 0)
+	    {
+	      free (stack);
+	      __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	      return false;
+	    }
+	  if (! push (val1 % val2))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  break;
+	BINOP (DW_OP_mul, *)
+	BINOP (DW_OP_or, |)
+	BINOP (DW_OP_plus, +)
+	BINOP (DW_OP_shl, <<)
+	BINOP (DW_OP_shr, >>)
+	BINOP_SIGNED (DW_OP_shra, >>)
+	BINOP (DW_OP_xor, ^)
+	BINOP_SIGNED (DW_OP_le, <=)
+	BINOP_SIGNED (DW_OP_ge, >=)
+	BINOP_SIGNED (DW_OP_eq, ==)
+	BINOP_SIGNED (DW_OP_lt, <)
+	BINOP_SIGNED (DW_OP_gt, >)
+	BINOP_SIGNED (DW_OP_ne, !=)
+#undef BINOP
+#undef BINOP_SIGNED
+	case DW_OP_bra:
+	  if (! pop (&val1))
+	    {
+	      free (stack);
+	      return false;
+	    }
+	  if (val1 == 0)
+	    break;
+	  /* FALLTHRU */
+	case DW_OP_skip:;
+	  Dwarf_Word offset = op->offset + 1 + 2 + (int16_t) op->number;
+	  const Dwarf_Op *found = bsearch ((void *) (uintptr_t) offset, ops, nops,
+					   sizeof (*ops), bra_compar);
+	  if (found == NULL)
+	    {
+	      free (stack);
+	      /* PPC32 vDSO has such invalid operations.  */
+	      __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	      return false;
+	    }
+	  /* Undo the 'for' statement increment.  */
+	  op = found - 1;
+	  break;
+	case DW_OP_nop:
+	  break;
+	/* DW_OP_* not listed in libgcc/unwind-dw2.c execute_stack_op:  */
+	case DW_OP_call_frame_cfa:;
+	  // Not used by CFI itself but it is synthetized by elfutils internation.
+	  Dwarf_Op *cfa_ops;
+	  size_t cfa_nops;
+	  Dwarf_Addr cfa;
+	  if (frame == NULL
+	      || dwarf_frame_cfa (frame, &cfa_ops, &cfa_nops) != 0
+	      || ! expr_eval (state, NULL, cfa_ops, cfa_nops, &cfa, bias)
+	      || ! push (cfa))
+	    {
+	      __libdwfl_seterrno (DWFL_E_LIBDW);
+	      free (stack);
+	      return false;
+	    }
+	  is_location = true;
+	  break;
+	case DW_OP_stack_value:
+	  // Not used by CFI itself but it is synthetized by elfutils internation.
+	  is_location = false;
+	  break;
+	default:
+	  __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	  return false;
+      }
+    }
+  if (! pop (result))
+    {
+      free (stack);
+      return false;
+    }
+  free (stack);
+  if (is_location)
+    {
+      if (process->callbacks->memory_read == NULL)
+	{
+	  __libdwfl_seterrno (DWFL_E_INVALID_ARGUMENT);
+	  return false;
+	}
+      if (! process->callbacks->memory_read (process->dwfl, *result, result,
+					     process->callbacks_arg))
+	return false;
+    }
+  return true;
+}
+
+static void
+new_unwound (Dwfl_Frame *state)
+{
+  assert (state->unwound == NULL);
+  Dwfl_Thread *thread = state->thread;
+  Dwfl_Process *process = thread->process;
+  Ebl *ebl = process->ebl;
+  size_t nregs = ebl_frame_nregs (ebl);
+  assert (nregs > 0);
+  Dwfl_Frame *unwound;
+  unwound = malloc (sizeof (*unwound) + sizeof (*unwound->regs) * nregs);
+  state->unwound = unwound;
+  unwound->thread = thread;
+  unwound->unwound = NULL;
+  unwound->signal_frame = false;
+  unwound->initial_frame = false;
+  unwound->pc_state = DWFL_FRAME_STATE_ERROR;
+  memset (unwound->regs_set, 0, sizeof (unwound->regs_set));
+}
+
+/* The logic is to call __libdwfl_seterrno for any CFI bytecode interpretation
+   error so one can easily catch the problem with a debugger.  Still there are
+   archs with invalid CFI for some registers where the registers are never used
+   later.  Therefore we continue unwinding leaving the registers undefined.  */
+
+static void
+handle_cfi (Dwfl_Frame *state, Dwarf_Addr pc, Dwarf_CFI *cfi, Dwarf_Addr bias)
+{
+  Dwarf_Frame *frame;
+  if (INTUSE(dwarf_cfi_addrframe) (cfi, pc, &frame) != 0)
+    {
+      __libdwfl_seterrno (DWFL_E_LIBDW);
+      return;
+    }
+  new_unwound (state);
+  Dwfl_Frame *unwound = state->unwound;
+  unwound->signal_frame = frame->fde->cie->signal_frame;
+  Dwfl_Thread *thread = state->thread;
+  Dwfl_Process *process = thread->process;
+  Ebl *ebl = process->ebl;
+  size_t nregs = ebl_frame_nregs (ebl);
+  assert (nregs > 0);
+
+  /* The return register is special for setting the unwound->pc_state.  */
+  unsigned ra = frame->fde->cie->return_address_register;
+  bool ra_set = false;
+  ebl_dwarf_to_regno (ebl, &ra);
+
+  for (unsigned regno = 0; regno < nregs; regno++)
+    {
+      Dwarf_Op reg_ops_mem[3], *reg_ops;
+      size_t reg_nops;
+      if (dwarf_frame_register (frame, regno, reg_ops_mem, &reg_ops,
+				&reg_nops) != 0)
+	{
+	  __libdwfl_seterrno (DWFL_E_LIBDW);
+	  continue;
+	}
+      Dwarf_Addr regval;
+      if (reg_nops == 0)
+	{
+	  if (reg_ops == reg_ops_mem)
+	    {
+	      /* REGNO is undefined.  */
+	      if (regno == ra)
+		unwound->pc_state = DWFL_FRAME_STATE_PC_UNDEFINED;
+	      continue;
+	    }
+	  else if (reg_ops == NULL)
+	    {
+	      /* REGNO is same-value.  */
+	      if (! state_get_reg (state, regno, &regval))
+		continue;
+	    }
+	  else
+	    {
+	      __libdwfl_seterrno (DWFL_E_INVALID_DWARF);
+	      continue;
+	    }
+	}
+      else if (! expr_eval (state, frame, reg_ops, reg_nops, &regval, bias))
+	{
+	  /* PPC32 vDSO has various invalid operations, ignore them.  The
+	     register will look as unset causing an error later, if used.
+	     But PPC32 does not use such registers.  */
+	  continue;
+	}
+
+      /* Some architectures encode some extra info in the return address.  */
+      if (regno == frame->fde->cie->return_address_register)
+	regval &= ebl_func_addr_mask (ebl);
+
+      /* This is another strange PPC[64] case.  There are two
+	 registers numbers that can represent the same DWARF return
+	 register number.  We only want one to actually set the return
+	 register value.  But we always want to override the value if
+	 the register is the actual CIE return address register.  */
+      if (ra_set && regno != frame->fde->cie->return_address_register)
+	{
+	  unsigned r = regno;
+	  if (ebl_dwarf_to_regno (ebl, &r) && r == ra)
+	    continue;
+	}
+
+      if (! __libdwfl_frame_reg_set (unwound, regno, regval))
+	{
+	  __libdwfl_seterrno (DWFL_E_INVALID_REGISTER);
+	  continue;
+	}
+      else if (! ra_set)
+	{
+	  unsigned r = regno;
+          if (ebl_dwarf_to_regno (ebl, &r) && r == ra)
+	    ra_set = true;
+	}
+    }
+  if (unwound->pc_state == DWFL_FRAME_STATE_ERROR
+      && __libdwfl_frame_reg_get (unwound,
+				  frame->fde->cie->return_address_register,
+				  &unwound->pc))
+    {
+      /* PPC32 __libc_start_main properly CFI-unwinds PC as zero.  Currently
+	 none of the archs supported for unwinding have zero as a valid PC.  */
+      if (unwound->pc == 0)
+	unwound->pc_state = DWFL_FRAME_STATE_PC_UNDEFINED;
+      else
+	unwound->pc_state = DWFL_FRAME_STATE_PC_SET;
+    }
+  free (frame);
+}
+
+static bool
+setfunc (int firstreg, unsigned nregs, const Dwarf_Word *regs, void *arg)
+{
+  Dwfl_Frame *state = arg;
+  Dwfl_Frame *unwound = state->unwound;
+  if (firstreg < 0)
+    {
+      assert (firstreg == -1);
+      assert (nregs == 1);
+      assert (unwound->pc_state == DWFL_FRAME_STATE_PC_UNDEFINED);
+      unwound->pc = *regs;
+      unwound->pc_state = DWFL_FRAME_STATE_PC_SET;
+      return true;
+    }
+  while (nregs--)
+    if (! __libdwfl_frame_reg_set (unwound, firstreg++, *regs++))
+      return false;
+  return true;
+}
+
+static bool
+getfunc (int firstreg, unsigned nregs, Dwarf_Word *regs, void *arg)
+{
+  Dwfl_Frame *state = arg;
+  assert (firstreg >= 0);
+  while (nregs--)
+    if (! __libdwfl_frame_reg_get (state, firstreg++, regs++))
+      return false;
+  return true;
+}
+
+static bool
+readfunc (Dwarf_Addr addr, Dwarf_Word *datap, void *arg)
+{
+  Dwfl_Frame *state = arg;
+  Dwfl_Thread *thread = state->thread;
+  Dwfl_Process *process = thread->process;
+  return process->callbacks->memory_read (process->dwfl, addr, datap,
+					  process->callbacks_arg);
+}
+
+void
+internal_function
+__libdwfl_frame_unwind (Dwfl_Frame *state)
+{
+  if (state->unwound)
+    return;
+  /* Do not ask dwfl_frame_pc for ISACTIVATION, it would try to unwind STATE
+     which would deadlock us.  */
+  Dwarf_Addr pc;
+  bool ok = INTUSE(dwfl_frame_pc) (state, &pc, NULL);
+  assert (ok);
+  /* Check whether this is the initial frame or a signal frame.
+     Then we need to unwind from the original, unadjusted PC.  */
+  if (! state->initial_frame && ! state->signal_frame)
+    pc--;
+  Dwfl_Module *mod = INTUSE(dwfl_addrmodule) (state->thread->process->dwfl, pc);
+  if (mod == NULL)
+    __libdwfl_seterrno (DWFL_E_NO_DWARF);
+  else
+    {
+      Dwarf_Addr bias;
+      Dwarf_CFI *cfi_eh = INTUSE(dwfl_module_eh_cfi) (mod, &bias);
+      if (cfi_eh)
+	{
+	  handle_cfi (state, pc - bias, cfi_eh, bias);
+	  if (state->unwound)
+	    return;
+	}
+      Dwarf_CFI *cfi_dwarf = INTUSE(dwfl_module_dwarf_cfi) (mod, &bias);
+      if (cfi_dwarf)
+	{
+	  handle_cfi (state, pc - bias, cfi_dwarf, bias);
+	  if (state->unwound)
+	    return;
+	}
+    }
+  assert (state->unwound == NULL);
+  Dwfl_Thread *thread = state->thread;
+  Dwfl_Process *process = thread->process;
+  Ebl *ebl = process->ebl;
+  new_unwound (state);
+  state->unwound->pc_state = DWFL_FRAME_STATE_PC_UNDEFINED;
+  // &Dwfl_Frame.signal_frame cannot be passed as it is a bitfield.
+  bool signal_frame = false;
+  if (! ebl_unwind (ebl, pc, setfunc, getfunc, readfunc, state, &signal_frame))
+    {
+      // Discard the unwind attempt.  During next __libdwfl_frame_unwind call
+      // we may have for example the appropriate Dwfl_Module already mapped.
+      assert (state->unwound->unwound == NULL);
+      free (state->unwound);
+      state->unwound = NULL;
+      // __libdwfl_seterrno has been called above.
+      return;
+    }
+  assert (state->unwound->pc_state == DWFL_FRAME_STATE_PC_SET);
+  state->unwound->signal_frame = signal_frame;
+}
diff --git a/src/libdwfl/gzip.c b/src/libdwfl/gzip.c
index 5604d490..b7dde5d4 100644
--- a/src/libdwfl/gzip.c
+++ b/src/libdwfl/gzip.c
@@ -1,51 +1,30 @@
 /* Decompression support for libdwfl: zlib (gzip) and/or bzlib (bzip2).
    Copyright (C) 2009 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "system.h"
diff --git a/src/libdwfl/image-header.c b/src/libdwfl/image-header.c
index c36d10c1..a4f6799a 100644
--- a/src/libdwfl/image-header.c
+++ b/src/libdwfl/image-header.c
@@ -1,51 +1,30 @@
 /* Linux kernel image support for libdwfl.
    Copyright (C) 2009-2011 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "system.h"
diff --git a/src/libdwfl/libdwfl.h b/src/libdwfl/libdwfl.h
index 4ea2796c..2bb4f455 100644
--- a/src/libdwfl/libdwfl.h
+++ b/src/libdwfl/libdwfl.h
@@ -1,51 +1,30 @@
 /* Interfaces for libdwfl.
-   Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2010, 2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef _LIBDWFL_H
 #define _LIBDWFL_H	1
@@ -62,6 +41,14 @@ typedef struct Dwfl_Module Dwfl_Module;
 /* Handle describing a line record.  */
 typedef struct Dwfl_Line Dwfl_Line;
 
+/* This holds information common for all the frames of one backtrace for
+   a partical thread/task/TID.  Several threads belong to one Dwfl.  */
+typedef struct Dwfl_Thread Dwfl_Thread;
+
+/* This holds everything we know about the state of the frame at a particular
+   PC location described by an FDE belonging to Dwfl_Thread.  */
+typedef struct Dwfl_Frame Dwfl_Frame;
+
 /* Callbacks.  */
 typedef struct
 {
@@ -158,14 +145,21 @@ extern int dwfl_report_segment (Dwfl *dwfl, int ndx,
 extern Dwfl_Module *dwfl_report_module (Dwfl *dwfl, const char *name,
 					Dwarf_Addr start, Dwarf_Addr end);
 
-/* Report a module with start and end addresses computed from the ELF
-   program headers in the given file, plus BASE.  For an ET_REL file,
-   does a simple absolute section layout starting at BASE.
+/* Report a module to address BASE with start and end addresses computed
+   from the ELF program headers in the given file - see the table below.
    FD may be -1 to open FILE_NAME.  On success, FD is consumed by the
-   library, and the `find_elf' callback will not be used for this module.  */
+   library, and the `find_elf' callback will not be used for this module.
+	    ADD_P_VADDR  BASE
+   ET_EXEC  ignored      ignored
+   ET_DYN   false        absolute address where to place the file
+	    true         start address relative to ELF's phdr p_vaddr
+   ET_REL   ignored      absolute address where to place the file
+   ET_CORE  ignored      ignored
+   ET_DYN ELF phdr p_vaddr address can be non-zero if the shared library
+   has been prelinked by tool prelink(8).  */
 extern Dwfl_Module *dwfl_report_elf (Dwfl *dwfl, const char *name,
 				     const char *file_name, int fd,
-				     GElf_Addr base);
+				     GElf_Addr base, bool add_p_vaddr);
 
 /* Similar, but report the module for offline use.  All ET_EXEC files
    being reported must be reported before any relocatable objects.
@@ -363,15 +357,17 @@ extern int dwfl_linux_kernel_report_offline (Dwfl *dwfl, const char *release,
    This can follow a dwfl_report_offline call to bootstrap the
    DT_DEBUG method of following the dynamic linker link_map chain, in
    case the core file does not contain enough of the executable's text
-   segment to locate its PT_DYNAMIC in the dump.  This might call
-   dwfl_report_elf on file names found in the dump if reading some
-   link_map files is the only way to ascertain those modules' addresses.
-   Returns the number of modules reported, or -1 for errors.  */
-extern int dwfl_core_file_report (Dwfl *dwfl, Elf *elf);
+   segment to locate its PT_DYNAMIC in the dump.  In such case you need to
+   supply non-NULL EXECUTABLE, otherwise dynamic libraries will not be loaded
+   into the DWFL map.  This might call dwfl_report_elf on file names found in
+   the dump if reading some link_map files is the only way to ascertain those
+   modules' addresses.  Returns the number of modules reported, or -1 for
+   errors.  */
+extern int dwfl_core_file_report (Dwfl *dwfl, Elf *elf, const char *executable);
 
 /* Call dwfl_report_module for each file mapped into the address space of PID.
    Returns zero on success, -1 if dwfl_report_module failed,
-   or an errno code if opening the kernel binary failed.  */
+   or an errno code if opening the proc files failed.  */
 extern int dwfl_linux_proc_report (Dwfl *dwfl, pid_t pid);
 
 /* Similar, but reads an input stream in the format of Linux /proc/PID/maps
@@ -424,28 +420,99 @@ extern int dwfl_validate_address (Dwfl *dwfl,
    are found) for use with libelf.  If successful, fills in *BIAS
    with the difference between addresses within the loaded module
    and those in symbol tables or Dwarf information referring to it.  */
-extern Elf *dwfl_module_getelf (Dwfl_Module *, GElf_Addr *bias);
+extern Elf *dwfl_module_getelf (Dwfl_Module *, GElf_Addr *bias)
+  __nonnull_attribute__ (1, 2);
 
 /* Return the number of symbols in the module's symbol table,
    or -1 for errors.  */
 extern int dwfl_module_getsymtab (Dwfl_Module *mod);
 
+/* Return the index of the first global symbol in the module's symbol
+   table, or -1 for errors.  In each symbol table, all symbols with
+   STB_LOCAL binding precede the weak and global symbols.  This
+   function returns the symbol table index one greater than the last
+   local symbol.  */
+extern int dwfl_module_getsymtab_first_global (Dwfl_Module *mod);
+
 /* Fetch one entry from the module's symbol table.  On errors, returns
    NULL.  If successful, fills in *SYM and returns the string for st_name.
    This works like gelf_getsym except that st_value is always adjusted to
    an absolute value based on the module's location, when the symbol is in
    an SHF_ALLOC section.  If SHNDXP is non-null, it's set with the section
    index (whether from st_shndx or extended index table); in case of a
-   symbol in a non-allocated section, *SHNDXP is instead set to -1.  */
+   symbol in a non-allocated section, *SHNDXP is instead set to -1.
+   Note that since symbols can come from either the main, debug or auxiliary
+   ELF symbol file (either dynsym or symtab) the section index can only
+   be reliably used to compare against special section constants like
+   SHN_UNDEF or SHN_ABS.  It is recommended to use dwfl_module_getsym_info
+   which doesn't have these deficiencies.  */
 extern const char *dwfl_module_getsym (Dwfl_Module *mod, int ndx,
 				       GElf_Sym *sym, GElf_Word *shndxp)
   __nonnull_attribute__ (3);
 
+/* Fetch one entry from the module's symbol table and the associated
+   address value.  On errors, returns NULL.  If successful, fills in
+   *SYM, *ADDR and returns the string for st_name.  This works like
+   gelf_getsym.  *ADDR is set to the st_value adjusted to an absolute
+   value based on the module's location, when the symbol is in an
+   SHF_ALLOC section.  For non-ET_REL files, if the arch uses function
+   descriptors, and the st_value points to one, *ADDR will be resolved
+   to the actual function entry address.  The SYM->ST_VALUE itself
+   isn't adjusted in any way.  Fills in ELFP, if not NULL, with the
+   ELF file the symbol originally came from.  Note that symbols can
+   come from either the main, debug or auxiliary ELF symbol file
+   (either dynsym or symtab).  If SHNDXP is non-null, it's set with
+   the section index (whether from st_shndx or extended index table);
+   in case of a symbol in a non-allocated section, *SHNDXP is instead
+   set to -1.  Fills in BIAS, if not NULL, with the difference between
+   addresses within the loaded module and those in symbol table of the
+   ELF file.  Note that the address associated with the symbol might
+   be in a different section than the returned symbol.  The section in
+   the main elf file in which returned ADDR falls can be found with
+   dwfl_module_address_section.  */
+extern const char *dwfl_module_getsym_info (Dwfl_Module *mod, int ndx,
+					    GElf_Sym *sym, GElf_Addr *addr,
+					    GElf_Word *shndxp,
+					    Elf **elfp, Dwarf_Addr *bias)
+  __nonnull_attribute__ (3, 4);
+
 /* Find the symbol that ADDRESS lies inside, and return its name.  */
 extern const char *dwfl_module_addrname (Dwfl_Module *mod, GElf_Addr address);
 
+/* Find the symbol associated with ADDRESS.  Return its name or NULL
+   when nothing was found.  If the architecture uses function
+   descriptors, and symbol st_value points to one, ADDRESS wil be
+   matched against either the adjusted st_value or the associated
+   function entry value as described in dwfl_module_getsym_info.  If
+   OFFSET is not NULL it will be filled in with the difference from
+   the start of the symbol (or function entry).  If SYM is not NULL it
+   is filled in with the symbol associated with the matched ADDRESS.
+   The SYM->ST_VALUE itself isn't adjusted in any way.  Fills in ELFP,
+   if not NULL, with the ELF file the symbol originally came from.
+   Note that symbols can come from either the main, debug or auxiliary
+   ELF symbol file (either dynsym or symtab).  If SHNDXP is non-null,
+   it's set with the section index (whether from st_shndx or extended
+   index table).  Fills in BIAS, if not NULL, with the difference
+   between addresses within the loaded module and those in symbol
+   table of the ELF file.  Note that the address matched against the
+   symbol might be in a different section than the returned symbol.
+   The section in the main elf file in ADDRESS falls can be found with
+   dwfl_module_address_section.  */
+extern const char *dwfl_module_addrinfo (Dwfl_Module *mod, GElf_Addr address,
+					 GElf_Off *offset, GElf_Sym *sym,
+					 GElf_Word *shndxp, Elf **elfp,
+					 Dwarf_Addr *bias)
+  __nonnull_attribute__ (3);
+
 /* Find the symbol that ADDRESS lies inside, and return detailed
-   information as for dwfl_module_getsym (above).  */
+   information as for dwfl_module_getsym (above).  Note that like
+   dwfl_module_getsym this function also adjusts SYM->ST_VALUE to an
+   absolute value based on the module's location.  ADDRESS is only
+   matched against this adjusted SYM->ST_VALUE.  This means that
+   depending on architecture this might only match symbols that
+   represent function descriptor addresses (and not function entry
+   addresses).  For these reasons it is recommended to use
+   dwfl_module_addrinfo instead.  */
 extern const char *dwfl_module_addrsym (Dwfl_Module *mod, GElf_Addr address,
 					GElf_Sym *sym, GElf_Word *shndxp)
   __nonnull_attribute__ (3);
@@ -578,6 +645,166 @@ extern Dwarf_CFI *dwfl_module_dwarf_cfi (Dwfl_Module *mod, Dwarf_Addr *bias);
 extern Dwarf_CFI *dwfl_module_eh_cfi (Dwfl_Module *mod, Dwarf_Addr *bias);
 
 
+typedef struct
+{
+  /* Called to iterate through threads.  Returns next TID (thread ID) on
+     success, a negative number on failure and zero if there are no more
+     threads.  dwfl_errno () should be set if negative number has been
+     returned.  *THREAD_ARGP is NULL on first call, and may be optionally
+     set by the implementation. The value set by the implementation will
+     be passed in on the next call to NEXT_THREAD.  THREAD_ARGP is never
+     NULL.  *THREAD_ARGP will be passed to set_initial_registers or
+     thread_detach callbacks together with Dwfl_Thread *thread.  This
+     method must not be NULL.  */
+  pid_t (*next_thread) (Dwfl *dwfl, void *dwfl_arg, void **thread_argp)
+    __nonnull_attribute__ (1);
+
+  /* Called to get a specific thread.  Returns true if there is a
+     thread with the given thread id number, returns false if no such
+     thread exists and will set dwfl_errno in that case.  THREAD_ARGP
+     is never NULL.  *THREAD_ARGP will be passed to
+     set_initial_registers or thread_detach callbacks together with
+     Dwfl_Thread *thread.  This method may be NULL and will then be
+     emulated using the next_thread callback. */
+  bool (*get_thread) (Dwfl *dwfl, pid_t tid, void *dwfl_arg,
+		      void **thread_argp)
+    __nonnull_attribute__ (1);
+
+  /* Called during unwinding to access memory (stack) state.  Returns true for
+     successfully read *RESULT or false and sets dwfl_errno () on failure.
+     This method may be NULL - in such case dwfl_thread_getframes will return
+     only the initial frame.  */
+  bool (*memory_read) (Dwfl *dwfl, Dwarf_Addr addr, Dwarf_Word *result,
+                       void *dwfl_arg)
+    __nonnull_attribute__ (1, 3);
+
+  /* Called on initial unwind to get the initial register state of the first
+     frame.  Should call dwfl_thread_state_registers, possibly multiple times
+     for different ranges and possibly also dwfl_thread_state_register_pc, to
+     fill in initial (DWARF) register values.  After this call, till at least
+     thread_detach is called, the thread is assumed to be frozen, so that it is
+     safe to unwind.  Returns true on success or false and sets dwfl_errno ()
+     on failure.  In the case of a failure thread_detach will not be called.
+     This method must not be NULL.  */
+  bool (*set_initial_registers) (Dwfl_Thread *thread, void *thread_arg)
+    __nonnull_attribute__ (1);
+
+  /* Called by dwfl_end.  All thread_detach method calls have been already
+     done.  This method may be NULL.  */
+  void (*detach) (Dwfl *dwfl, void *dwfl_arg)
+    __nonnull_attribute__ (1);
+
+  /* Called when unwinding is done.  No callback will be called after
+     this method has been called.  Iff set_initial_registers was called for
+     a TID and it returned success thread_detach will be called before the
+     detach method above.  This method may be NULL.  */
+  void (*thread_detach) (Dwfl_Thread *thread, void *thread_arg)
+    __nonnull_attribute__ (1);
+} Dwfl_Thread_Callbacks;
+
+/* PID is the process id associated with the DWFL state.  Architecture of DWFL
+   modules is specified by ELF, ELF must remain valid during DWFL lifetime.
+   Use NULL ELF to detect architecture from DWFL, the function will then detect
+   it from arbitrary Dwfl_Module of DWFL.  DWFL_ARG is the callback backend
+   state.  DWFL_ARG will be provided to the callbacks.  *THREAD_CALLBACKS
+   function pointers must remain valid during lifetime of DWFL.  Function
+   returns true on success, false otherwise.  */
+bool dwfl_attach_state (Dwfl *dwfl, Elf *elf, pid_t pid,
+                        const Dwfl_Thread_Callbacks *thread_callbacks,
+			void *dwfl_arg)
+  __nonnull_attribute__ (1, 4);
+
+/* Calls dwfl_attach_state with Dwfl_Thread_Callbacks setup for extracting
+   thread state from the ELF core file.  Returns the pid number extracted
+   from the core file, or -1 for errors.  */
+extern int dwfl_core_file_attach (Dwfl *dwfl, Elf *elf);
+
+/* Calls dwfl_attach_state with Dwfl_Thread_Callbacks setup for extracting
+   thread state from the proc file system.  Uses ptrace to attach and stop
+   the thread under inspection and detaches when thread_detach is called
+   and unwinding for the thread is done, unless ASSUME_PTRACE_STOPPED is
+   true.  If ASSUME_PTRACE_STOPPED is true the caller should make sure that
+   the thread is ptrace attached and stopped before unwinding by calling
+   either dwfl_thread_getframes or dwfl_getthread_frames.  Returns zero on
+   success, -1 if dwfl_attach_state failed, or an errno code if opening the
+   proc files failed.  */
+extern int dwfl_linux_proc_attach (Dwfl *dwfl, pid_t pid,
+				   bool assume_ptrace_stopped);
+
+/* Return PID for the process associated with DWFL.  Function returns -1 if
+   dwfl_attach_state was not called for DWFL.  */
+pid_t dwfl_pid (Dwfl *dwfl)
+  __nonnull_attribute__ (1);
+
+/* Return DWFL from which THREAD was created using dwfl_getthreads.  */
+Dwfl *dwfl_thread_dwfl (Dwfl_Thread *thread)
+  __nonnull_attribute__ (1);
+
+/* Return positive TID (thread ID) for THREAD.  This function never fails.  */
+pid_t dwfl_thread_tid (Dwfl_Thread *thread)
+  __nonnull_attribute__ (1);
+
+/* Return thread for frame STATE.  This function never fails.  */
+Dwfl_Thread *dwfl_frame_thread (Dwfl_Frame *state)
+  __nonnull_attribute__ (1);
+
+/* Called by Dwfl_Thread_Callbacks.set_initial_registers implementation.
+   For every known continuous block of registers <FIRSTREG..FIRSTREG+NREGS)
+   (inclusive..exclusive) set their content to REGS (array of NREGS items).
+   Function returns false if any of the registers has invalid number.  */
+bool dwfl_thread_state_registers (Dwfl_Thread *thread, int firstreg,
+                                  unsigned nregs, const Dwarf_Word *regs)
+  __nonnull_attribute__ (1, 4);
+
+/* Called by Dwfl_Thread_Callbacks.set_initial_registers implementation.
+   If PC is not contained among DWARF registers passed by
+   dwfl_thread_state_registers on the target architecture pass the PC value
+   here.  */
+void dwfl_thread_state_register_pc (Dwfl_Thread *thread, Dwarf_Word pc)
+  __nonnull_attribute__ (1);
+
+/* Iterate through the threads for a process.  Returns zero if all threads have
+   been processed by the callback, returns -1 on error, or the value of the
+   callback when not DWARF_CB_OK.  -1 returned on error will set dwfl_errno ().
+   Keeps calling the callback with the next thread while the callback returns
+   DWARF_CB_OK, till there are no more threads.  */
+int dwfl_getthreads (Dwfl *dwfl,
+		     int (*callback) (Dwfl_Thread *thread, void *arg),
+		     void *arg)
+  __nonnull_attribute__ (1, 2);
+
+/* Iterate through the frames for a thread.  Returns zero if all frames
+   have been processed by the callback, returns -1 on error, or the value of
+   the callback when not DWARF_CB_OK.  -1 returned on error will
+   set dwfl_errno ().  Some systems return error instead of zero on end of the
+   backtrace, for cross-platform compatibility callers should consider error as
+   a zero.  Keeps calling the callback with the next frame while the callback
+   returns DWARF_CB_OK, till there are no more frames.  On start will call the
+   set_initial_registers callback and on return will call the detach_thread
+   callback of the Dwfl_Thread.  */
+int dwfl_thread_getframes (Dwfl_Thread *thread,
+			   int (*callback) (Dwfl_Frame *state, void *arg),
+			   void *arg)
+  __nonnull_attribute__ (1, 2);
+
+/* Like dwfl_thread_getframes, but specifying the thread by its unique
+   identifier number.  Returns zero if all frames have been processed
+   by the callback, returns -1 on error (and when no thread with
+   the given thread id number exists), or the value of the callback
+   when not DWARF_CB_OK.  -1 returned on error will set dwfl_errno ().  */
+int dwfl_getthread_frames (Dwfl *dwfl, pid_t tid,
+			   int (*callback) (Dwfl_Frame *thread, void *arg),
+			   void *arg)
+  __nonnull_attribute__ (1, 3);
+
+/* Return *PC (program counter) for thread-specific frame STATE.
+   Set *ISACTIVATION according to DWARF frame "activation" definition.
+   Typically you need to substract 1 from *PC if *ACTIVATION is false to safely
+   find function of the caller.  ACTIVATION may be NULL.  PC must not be NULL.
+   Function returns false if it failed to find *PC.  */
+bool dwfl_frame_pc (Dwfl_Frame *state, Dwarf_Addr *pc, bool *isactivation)
+  __nonnull_attribute__ (1, 2);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/libdwfl/libdwflP.h b/src/libdwfl/libdwflP.h
index bca82d2e..12ee116e 100644
--- a/src/libdwfl/libdwflP.h
+++ b/src/libdwfl/libdwflP.h
@@ -1,51 +1,30 @@
 /* Internal definitions for libdwfl.
-   Copyright (C) 2005-2011 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef _LIBDWFLP_H
 #define _LIBDWFLP_H	1
@@ -56,12 +35,16 @@
 #include <libdwfl.h>
 #include <libebl.h>
 #include <assert.h>
+#include <dirent.h>
 #include <errno.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "../libdw/libdwP.h"	/* We need its INTDECLs.  */
+#include "../libdwelf/libdwelfP.h"
+
+typedef struct Dwfl_Process Dwfl_Process;
 
 /* gettext helper macros.  */
 #define _(Str) dgettext ("elfutils", Str)
@@ -95,7 +78,21 @@
   DWFL_ERROR (BADELF, N_("not a valid ELF file"))			      \
   DWFL_ERROR (WEIRD_TYPE, N_("cannot handle DWARF type description"))	      \
   DWFL_ERROR (WRONG_ID_ELF, N_("ELF file does not match build ID"))	      \
-  DWFL_ERROR (BAD_PRELINK, N_("corrupt .gnu.prelink_undo section data"))
+  DWFL_ERROR (BAD_PRELINK, N_("corrupt .gnu.prelink_undo section data"))      \
+  DWFL_ERROR (LIBEBL_BAD, N_("Internal error due to ebl"))		      \
+  DWFL_ERROR (CORE_MISSING, N_("Missing data in core file"))		      \
+  DWFL_ERROR (INVALID_REGISTER, N_("Invalid register"))			      \
+  DWFL_ERROR (PROCESS_MEMORY_READ, N_("Error reading process memory"))	      \
+  DWFL_ERROR (PROCESS_NO_ARCH, N_("Couldn't find architecture of any ELF"))   \
+  DWFL_ERROR (PARSE_PROC, N_("Error parsing /proc filesystem"))		      \
+  DWFL_ERROR (INVALID_DWARF, N_("Invalid DWARF"))			      \
+  DWFL_ERROR (UNSUPPORTED_DWARF, N_("Unsupported DWARF"))		      \
+  DWFL_ERROR (NEXT_THREAD_FAIL, N_("Unable to find more threads"))	      \
+  DWFL_ERROR (ATTACH_STATE_CONFLICT, N_("Dwfl already has attached state"))   \
+  DWFL_ERROR (NO_ATTACH_STATE, N_("Dwfl has no attached state"))	      \
+  DWFL_ERROR (NO_UNWIND, N_("Unwinding not supported for this architecture")) \
+  DWFL_ERROR (INVALID_ARGUMENT, N_("Invalid argument"))			      \
+  DWFL_ERROR (NO_CORE_FILE, N_("Not an ET_CORE ELF file"))
 
 #define DWFL_ERROR(name, text) DWFL_E_##name,
 typedef enum { DWFL_ERRORS DWFL_E_NUM } Dwfl_Error;
@@ -113,6 +110,9 @@ struct Dwfl
 
   Dwfl_Module *modulelist;    /* List in order used by full traversals.  */
 
+  Dwfl_Process *process;
+  Dwfl_Error attacherr;      /* Previous error attaching process.  */
+
   GElf_Addr offline_next_address;
 
   GElf_Addr segment_align;	/* Smallest granularity of segments.  */
@@ -129,6 +129,8 @@ struct Dwfl
   GElf_Off lookup_tail_vaddr;
   GElf_Off lookup_tail_offset;
   int lookup_tail_ndx;
+
+  char *executable_for_core;	/* --executable if --core was specified.  */
 };
 
 #define OFFLINE_REDZONE		0x10000
@@ -161,7 +163,7 @@ struct Dwfl_Module
   char *name;			/* Iterator name for this module.  */
   GElf_Addr low_addr, high_addr;
 
-  struct dwfl_file main, debug;
+  struct dwfl_file main, debug, aux_sym;
   GElf_Addr main_bias;
   Ebl *ebl;
   GElf_Half e_type;		/* GElf_Ehdr.e_type cache.  */
@@ -171,12 +173,20 @@ struct Dwfl_Module
 
   struct dwfl_file *symfile;	/* Either main or debug.  */
   Elf_Data *symdata;		/* Data in the ELF symbol table section.  */
+  Elf_Data *aux_symdata;	/* Data in the auxiliary ELF symbol table.  */
   size_t syments;		/* sh_size / sh_entsize of that section.  */
+  size_t aux_syments;		/* sh_size / sh_entsize of aux_sym section.  */
   int first_global;		/* Index of first global symbol of table.  */
+  int aux_first_global;		/* Index of first global of aux_sym table.  */
   Elf_Data *symstrdata;		/* Data for its string table.  */
+  Elf_Data *aux_symstrdata;	/* Data for aux_sym string table.  */
   Elf_Data *symxndxdata;	/* Data in the extended section index table. */
+  Elf_Data *aux_symxndxdata;	/* Data in the extended auxiliary table. */
 
   Dwarf *dw;			/* libdw handle for its debugging info.  */
+  Dwarf *alt;			/* Dwarf used for dwarf_setalt, or NULL.  */
+  int alt_fd; 			/* descriptor, only valid when alt != NULL.  */
+  Elf *alt_elf; 		/* Elf for alt Dwarf.  */
 
   Dwfl_Error symerr;		/* Previous failure to load symbols.  */
   Dwfl_Error dwerr;		/* Previous failure to load DWARF.  */
@@ -201,9 +211,75 @@ struct Dwfl_Module
 
   int segment;			/* Index of first segment table entry.  */
   bool gc;			/* Mark/sweep flag.  */
+  bool is_executable;		/* Use Dwfl::executable_for_core?  */
+};
+
+/* This holds information common for all the threads/tasks/TIDs of one process
+   for backtraces.  */
+
+struct Dwfl_Process
+{
+  struct Dwfl *dwfl;
+  pid_t pid;
+  const Dwfl_Thread_Callbacks *callbacks;
+  void *callbacks_arg;
+  struct ebl *ebl;
+  bool ebl_close:1;
+};
+
+/* See its typedef in libdwfl.h.  */
+
+struct Dwfl_Thread
+{
+  Dwfl_Process *process;
+  pid_t tid;
+  /* The current frame being unwound.  Initially it is the bottom frame.
+     Later the processed frames get freed and this pointer is updated.  */
+  Dwfl_Frame *unwound;
+  void *callbacks_arg;
+};
+
+/* See its typedef in libdwfl.h.  */
+
+struct Dwfl_Frame
+{
+  Dwfl_Thread *thread;
+  /* Previous (outer) frame.  */
+  Dwfl_Frame *unwound;
+  bool signal_frame : 1;
+  bool initial_frame : 1;
+  enum
+  {
+    /* This structure is still being initialized or there was an error
+       initializing it.  */
+    DWFL_FRAME_STATE_ERROR,
+    /* PC field is valid.  */
+    DWFL_FRAME_STATE_PC_SET,
+    /* PC field is undefined, this means the next (inner) frame was the
+       outermost frame.  */
+    DWFL_FRAME_STATE_PC_UNDEFINED
+  } pc_state;
+  /* Either initialized from appropriate REGS element or on some archs
+     initialized separately as the return address has no DWARF register.  */
+  Dwarf_Addr pc;
+  /* (1 << X) bitmask where 0 <= X < ebl_frame_nregs.  */
+  uint64_t regs_set[3];
+  /* REGS array size is ebl_frame_nregs.
+     REGS_SET tells which of the REGS are valid.  */
+  Dwarf_Addr regs[];
 };
 
+/* Fetch value from Dwfl_Frame->regs indexed by DWARF REGNO.
+   No error code is set if the function returns FALSE.  */
+bool __libdwfl_frame_reg_get (Dwfl_Frame *state, unsigned regno,
+			      Dwarf_Addr *val)
+  internal_function;
 
+/* Store value to Dwfl_Frame->regs indexed by DWARF REGNO.
+   No error code is set if the function returns FALSE.  */
+bool __libdwfl_frame_reg_set (Dwfl_Frame *state, unsigned regno,
+			      Dwarf_Addr val)
+  internal_function;
 
 /* Information cached about each CU in Dwfl_Module.dw.  */
 struct dwfl_cu
@@ -274,20 +350,40 @@ dwfl_deadjust_dwarf_addr (Dwfl_Module *mod, Dwarf_Addr addr)
 	  + mod->debug.address_sync);
 }
 
+static inline Dwarf_Addr
+dwfl_adjusted_aux_sym_addr (Dwfl_Module *mod, Dwarf_Addr addr)
+{
+  return dwfl_adjusted_address (mod, (addr
+				      - mod->aux_sym.address_sync
+				      + mod->main.address_sync));
+}
+
+static inline Dwarf_Addr
+dwfl_deadjust_aux_sym_addr (Dwfl_Module *mod, Dwarf_Addr addr)
+{
+  return (dwfl_deadjust_address (mod, addr)
+	  - mod->main.address_sync
+	  + mod->aux_sym.address_sync);
+}
+
 static inline GElf_Addr
-dwfl_adjusted_st_value (Dwfl_Module *mod, GElf_Addr addr)
+dwfl_adjusted_st_value (Dwfl_Module *mod, Elf *symelf, GElf_Addr addr)
 {
-  if (mod->symfile == &mod->main)
+  if (symelf == mod->main.elf)
     return dwfl_adjusted_address (mod, addr);
-  return dwfl_adjusted_dwarf_addr (mod, addr);
+  if (symelf == mod->debug.elf)
+    return dwfl_adjusted_dwarf_addr (mod, addr);
+  return dwfl_adjusted_aux_sym_addr (mod, addr);
 }
 
 static inline GElf_Addr
-dwfl_deadjust_st_value (Dwfl_Module *mod, GElf_Addr addr)
+dwfl_deadjust_st_value (Dwfl_Module *mod, Elf *symelf, GElf_Addr addr)
 {
-  if (mod->symfile == &mod->main)
+  if (symelf == mod->main.elf)
     return dwfl_deadjust_address (mod, addr);
-  return dwfl_deadjust_dwarf_addr (mod, addr);
+  if (symelf == mod->debug.elf)
+    return dwfl_deadjust_dwarf_addr (mod, addr);
+  return dwfl_deadjust_aux_sym_addr (mod, addr);
 }
 
 /* This describes a contiguous address range that lies in a single CU.
@@ -299,6 +395,56 @@ struct dwfl_arange
 };
 
 
+/* Structure used for keeping track of ptrace attaching a thread.
+   Shared by linux-pid-attach and linux-proc-maps.  If it has been setup
+   then get the instance through __libdwfl_get_pid_arg.  */
+struct __libdwfl_pid_arg
+{
+  DIR *dir;
+  /* It is 0 if not used.  */
+  pid_t tid_attached;
+  /* Valid only if TID_ATTACHED is not zero.  */
+  bool tid_was_stopped;
+  /* True if threads are ptrace stopped by caller.  */
+  bool assume_ptrace_stopped;
+};
+
+/* If DWfl is not NULL and a Dwfl_Process has been setup that has
+   Dwfl_Thread_Callbacks set to pid_thread_callbacks, then return the
+   callbacks_arg, which will be a struct __libdwfl_pid_arg.  Otherwise
+   returns NULL.  */
+extern struct __libdwfl_pid_arg *__libdwfl_get_pid_arg (Dwfl *dwfl)
+  internal_function;
+
+/* Makes sure the given tid is attached. On success returns true and
+   sets tid_was_stopped.  */
+extern bool __libdwfl_ptrace_attach (pid_t tid, bool *tid_was_stoppedp)
+  internal_function;
+
+/* Detaches a tid that was attached through
+   __libdwfl_ptrace_attach. Must be given the tid_was_stopped as set
+   by __libdwfl_ptrace_attach.  */
+extern void __libdwfl_ptrace_detach (pid_t tid, bool tid_was_stopped)
+  internal_function;
+
+
+/* Internal wrapper for old dwfl_module_getsym and new dwfl_module_getsym_info.
+   adjust_st_value set to true returns adjusted SYM st_value, set to false
+   it will not adjust SYM at all, but does match against resolved *ADDR. */
+extern const char *__libdwfl_getsym (Dwfl_Module *mod, int ndx, GElf_Sym *sym,
+				     GElf_Addr *addr, GElf_Word *shndxp,
+				     Elf **elfp, Dwarf_Addr *biasp,
+				     bool *resolved, bool adjust_st_value)
+  internal_function;
+
+/* Internal wrapper for old dwfl_module_addrsym and new dwfl_module_addrinfo.
+   adjust_st_value set to true returns adjusted SYM st_value, set to false
+   it will not adjust SYM at all, but does match against resolved values. */
+extern const char *__libdwfl_addrsym (Dwfl_Module *mod, GElf_Addr addr,
+				      GElf_Off *off, GElf_Sym *sym,
+				      GElf_Word *shndxp, Elf **elfp,
+				      Dwarf_Addr *bias,
+				      bool adjust_st_value) internal_function;
 
 extern void __libdwfl_module_free (Dwfl_Module *mod) internal_function;
 
@@ -315,6 +461,12 @@ extern void __libdwfl_getelf (Dwfl_Module *mod) internal_function;
 extern Dwfl_Error __libdwfl_relocate (Dwfl_Module *mod, Elf *file, bool debug)
   internal_function;
 
+/* Find the section index in mod->main.elf that contains the given
+   *ADDR.  Adjusts *ADDR to be section relative on success, returns
+   SHN_UNDEF on failure.  */
+extern size_t __libdwfl_find_section_ndx (Dwfl_Module *mod, Dwarf_Addr *addr)
+  internal_function;
+
 /* Process (simple) relocations in arbitrary section TSCN of an ET_REL file.
    RELOCSCN is SHT_REL or SHT_RELA and TSCN is its sh_info target section.  */
 extern Dwfl_Error __libdwfl_relocate_section (Dwfl_Module *mod, Elf *relocated,
@@ -331,7 +483,6 @@ extern Dwfl_Error __libdwfl_relocate_value (Dwfl_Module *mod, Elf *elf,
 					    GElf_Addr *value)
      internal_function;
 
-
 /* Ensure that MOD->ebl is set up.  */
 extern Dwfl_Error __libdwfl_module_getebl (Dwfl_Module *mod) internal_function;
 
@@ -354,6 +505,17 @@ extern Dwfl_Error __libdwfl_addrcu (Dwfl_Module *mod, Dwarf_Addr addr,
 extern Dwfl_Error __libdwfl_cu_getsrclines (struct dwfl_cu *cu)
   internal_function;
 
+/* Look in ELF for an NT_GNU_BUILD_ID note.  Store it to BUILD_ID_BITS,
+   its vaddr in ELF to BUILD_ID_VADDR (it is unrelocated, even if MOD is not
+   NULL) and store length to BUILD_ID_LEN.  Returns -1 for errors, 1 if it was
+   stored and 0 if no note is found.  MOD may be NULL, MOD must be non-NULL
+   only if ELF is ET_REL.  */
+extern int __libdwfl_find_elf_build_id (Dwfl_Module *mod, Elf *elf,
+					const void **build_id_bits,
+					GElf_Addr *build_id_elfaddr,
+					int *build_id_len)
+  internal_function;
+
 /* Look in ELF for an NT_GNU_BUILD_ID note.  If SET is true, store it
    in MOD and return its length.  If SET is false, instead compare it
    to that stored in MOD and return 2 if they match, 1 if they do not.
@@ -362,19 +524,35 @@ extern int __libdwfl_find_build_id (Dwfl_Module *mod, bool set, Elf *elf)
   internal_function;
 
 /* Open a main or debuginfo file by its build ID, returns the fd.  */
+extern int __libdwfl_open_mod_by_build_id (Dwfl_Module *mod, bool debug,
+					   char **file_name) internal_function;
+
+/* Same, but takes an explicit build_id, can also be used for alt debug.  */
 extern int __libdwfl_open_by_build_id (Dwfl_Module *mod, bool debug,
-				       char **file_name) internal_function;
+				       char **file_name, const size_t id_len,
+				       const uint8_t *id) internal_function;
 
 extern uint32_t __libdwfl_crc32 (uint32_t crc, unsigned char *buf, size_t len)
   attribute_hidden;
 extern int __libdwfl_crc32_file (int fd, uint32_t *resp) attribute_hidden;
 
 
+/* Given ELF and some parameters return TRUE if the *P return value parameters
+   have been successfully filled in.  Any of the *P parameters can be NULL.  */
+extern bool __libdwfl_elf_address_range (Elf *elf, GElf_Addr base,
+					 bool add_p_vaddr, bool sanity,
+					 GElf_Addr *vaddrp,
+					 GElf_Addr *address_syncp,
+					 GElf_Addr *startp, GElf_Addr *endp,
+					 GElf_Addr *biasp, GElf_Half *e_typep)
+  internal_function;
+
 /* Meat of dwfl_report_elf, given elf_begin just called.
    Consumes ELF on success, not on failure.  */
 extern Dwfl_Module *__libdwfl_report_elf (Dwfl *dwfl, const char *name,
 					  const char *file_name, int fd,
-					  Elf *elf, GElf_Addr base, bool sanity)
+					  Elf *elf, GElf_Addr base,
+					  bool add_p_vaddr, bool sanity)
   internal_function;
 
 /* Meat of dwfl_report_offline.  */
@@ -385,6 +563,25 @@ extern Dwfl_Module *__libdwfl_report_offline (Dwfl *dwfl, const char *name,
 								const char *))
   internal_function;
 
+/* Free PROCESS.  Unlink and free also any structures it references.  */
+extern void __libdwfl_process_free (Dwfl_Process *process)
+  internal_function;
+
+/* Update STATE->unwound for the unwound frame.
+   On error STATE->unwound == NULL
+   or STATE->unwound->pc_state == DWFL_FRAME_STATE_ERROR;
+   in such case dwfl_errno () is set.
+   If STATE->unwound->pc_state == DWFL_FRAME_STATE_PC_UNDEFINED
+   then STATE was the last valid frame.  */
+extern void __libdwfl_frame_unwind (Dwfl_Frame *state)
+  internal_function;
+
+/* Align segment START downwards or END upwards addresses according to DWFL.  */
+extern GElf_Addr __libdwfl_segment_start (Dwfl *dwfl, GElf_Addr start)
+  internal_function;
+extern GElf_Addr __libdwfl_segment_end (Dwfl *dwfl, GElf_Addr end)
+  internal_function;
+
 /* Decompression wrappers: decompress whole file into memory.  */
 extern Dwfl_Error __libdw_gunzip  (int fd, off64_t start_offset,
 				   void *mapped, size_t mapped_size,
@@ -412,6 +609,11 @@ extern Dwfl_Error __libdw_open_file (int *fdp, Elf **elfp,
 				     bool close_on_fail, bool archive_ok)
   internal_function;
 
+/* Fetch PT_DYNAMIC P_VADDR from ELF and store it to *VADDRP.  Return success.
+   *VADDRP is not modified if the function fails.  */
+extern bool __libdwfl_dynamic_vaddr_get (Elf *elf, GElf_Addr *vaddrp)
+  internal_function;
+
 /* These are working nicely for --core, but are not ready to be
    exported interfaces quite yet.  */
 
@@ -430,13 +632,37 @@ typedef bool Dwfl_Module_Callback (Dwfl_Module *mod, void **userdata,
 				   GElf_Off whole, GElf_Off contiguous,
 				   void *arg, Elf **elfp);
 
+/* One shared library (or executable) info from DT_DEBUG link map.  */
+struct r_debug_info_module
+{
+  struct r_debug_info_module *next;
+  /* FD is -1 iff ELF is NULL.  */
+  int fd;
+  Elf *elf;
+  GElf_Addr l_ld;
+  /* START and END are both zero if not valid.  */
+  GElf_Addr start, end;
+  bool disk_file_has_build_id;
+  char name[0];
+};
+
+/* Information gathered from DT_DEBUG by dwfl_link_map_report hinted to
+   dwfl_segment_report_module.  */
+struct r_debug_info
+{
+  struct r_debug_info_module *module;
+};
+
 /* ...
  */
 extern int dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
 				       Dwfl_Memory_Callback *memory_callback,
 				       void *memory_callback_arg,
 				       Dwfl_Module_Callback *read_eagerly,
-				       void *read_eagerly_arg);
+				       void *read_eagerly_arg,
+				       const void *note_file,
+				       size_t note_file_size,
+				       const struct r_debug_info *r_debug_info);
 
 /* Report a module for entry in the dynamic linker's struct link_map list.
    For each link_map entry, if an existing module resides at its address,
@@ -450,10 +676,16 @@ extern int dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
    only find where to begin if the correct executable file was
    previously reported and preloaded as with dwfl_report_elf.
 
+   Fill in R_DEBUG_INFO if it is not NULL.  It should be cleared by the
+   caller, this function does not touch fields it does not need to modify.
+   If R_DEBUG_INFO is not NULL then no modules get added to DWFL, caller
+   has to add them from filled in R_DEBUG_INFO.
+
    Returns the number of modules found, or -1 for errors.  */
 extern int dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t auxv_size,
 				 Dwfl_Memory_Callback *memory_callback,
-				 void *memory_callback_arg);
+				 void *memory_callback_arg,
+				 struct r_debug_info *r_debug_info);
 
 
 /* Avoid PLT entries.  */
@@ -464,16 +696,20 @@ INTDECL (dwfl_addrmodule)
 INTDECL (dwfl_addrsegment)
 INTDECL (dwfl_addrdwarf)
 INTDECL (dwfl_addrdie)
+INTDECL (dwfl_core_file_attach)
 INTDECL (dwfl_core_file_report)
 INTDECL (dwfl_getmodules)
 INTDECL (dwfl_module_addrdie)
 INTDECL (dwfl_module_address_section)
+INTDECL (dwfl_module_addrinfo)
 INTDECL (dwfl_module_addrsym)
 INTDECL (dwfl_module_build_id)
 INTDECL (dwfl_module_getdwarf)
 INTDECL (dwfl_module_getelf)
 INTDECL (dwfl_module_getsym)
+INTDECL (dwfl_module_getsym_info)
 INTDECL (dwfl_module_getsymtab)
+INTDECL (dwfl_module_getsymtab_first_global)
 INTDECL (dwfl_module_getsrc)
 INTDECL (dwfl_module_report_build_id)
 INTDECL (dwfl_report_elf)
@@ -489,6 +725,7 @@ INTDECL (dwfl_standard_find_debuginfo)
 INTDECL (dwfl_link_map_report)
 INTDECL (dwfl_linux_kernel_find_elf)
 INTDECL (dwfl_linux_kernel_module_section_address)
+INTDECL (dwfl_linux_proc_attach)
 INTDECL (dwfl_linux_proc_report)
 INTDECL (dwfl_linux_proc_maps_report)
 INTDECL (dwfl_linux_proc_find_elf)
@@ -499,6 +736,17 @@ INTDECL (dwfl_offline_section_address)
 INTDECL (dwfl_module_relocate_address)
 INTDECL (dwfl_module_dwarf_cfi)
 INTDECL (dwfl_module_eh_cfi)
+INTDECL (dwfl_attach_state)
+INTDECL (dwfl_pid)
+INTDECL (dwfl_thread_dwfl)
+INTDECL (dwfl_thread_tid)
+INTDECL (dwfl_frame_thread)
+INTDECL (dwfl_thread_state_registers)
+INTDECL (dwfl_thread_state_register_pc)
+INTDECL (dwfl_getthread_frames)
+INTDECL (dwfl_getthreads)
+INTDECL (dwfl_thread_getframes)
+INTDECL (dwfl_frame_pc)
 
 /* Leading arguments standard to callbacks passed a Dwfl_Module.  */
 #define MODCB_ARGS(mod)	(mod), &(mod)->userdata, (mod)->name, (mod)->low_addr
diff --git a/src/libdwfl/libdwfl_crc32.c b/src/libdwfl/libdwfl_crc32.c
index 0fa23789..b89d0d36 100644
--- a/src/libdwfl/libdwfl_crc32.c
+++ b/src/libdwfl/libdwfl_crc32.c
@@ -1,50 +1,29 @@
 /* Copyright (C) 2002, 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #ifdef HAVE_CONFIG_H
 # include <config.h>
diff --git a/src/libdwfl/libdwfl_crc32_file.c b/src/libdwfl/libdwfl_crc32_file.c
index ca154be3..6b6b7d3f 100644
--- a/src/libdwfl/libdwfl_crc32_file.c
+++ b/src/libdwfl/libdwfl_crc32_file.c
@@ -1,50 +1,29 @@
 /* Copyright (C) 2002, 2005 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #ifdef HAVE_CONFIG_H
 # include <config.h>
diff --git a/src/libdwfl/lines.c b/src/libdwfl/lines.c
index ed4267fc..721e29cc 100644
--- a/src/libdwfl/lines.c
+++ b/src/libdwfl/lines.c
@@ -1,51 +1,30 @@
 /* Fetch source line info for CU.
    Copyright (C) 2005, 2006 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include "../libdw/libdwP.h"
diff --git a/src/libdwfl/link_map.c b/src/libdwfl/link_map.c
index 05839b3a..eaf43b57 100644
--- a/src/libdwfl/link_map.c
+++ b/src/libdwfl/link_map.c
@@ -1,57 +1,39 @@
 /* Report modules by examining dynamic linker data structures.
-   Copyright (C) 2008-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2008-2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 #include "libdwflP.h"
+#include "../libdw/memory-access.h"
+#include "system.h"
 
 #include <byteswap.h>
 #include <endian.h>
+#include <fcntl.h>
 
 /* This element is always provided and always has a constant value.
    This makes it an easy thing to scan for to discern the format.  */
@@ -59,18 +41,6 @@
 #define PROBE_VAL32	sizeof (Elf32_Phdr)
 #define PROBE_VAL64	sizeof (Elf64_Phdr)
 
-#if BYTE_ORDER == BIG_ENDIAN
-# define BE32(x)	(x)
-# define BE64(x)	(x)
-# define LE32(x)	bswap_32 (x)
-# define LE64(x)	bswap_64 (x)
-#else
-# define LE32(x)	(x)
-# define LE64(x)	(x)
-# define BE32(x)	bswap_32 (x)
-# define BE64(x)	bswap_64 (x)
-#endif
-
 
 /* Examine an auxv data block and determine its format.
    Return true iff we figured it out.  */
@@ -87,15 +57,22 @@ auxv_format_probe (const void *auxv, size_t size,
 
   inline bool check64 (size_t i)
   {
-    if (u->a64[i].a_type == BE64 (PROBE_TYPE)
-	&& u->a64[i].a_un.a_val == BE64 (PROBE_VAL64))
+    /* The AUXV pointer might not even be naturally aligned for 64-bit
+       data, because note payloads in a core file are not aligned.
+       But we assume the data is 32-bit aligned.  */
+
+    uint64_t type = read_8ubyte_unaligned_noncvt (&u->a64[i].a_type);
+    uint64_t val = read_8ubyte_unaligned_noncvt (&u->a64[i].a_un.a_val);
+
+    if (type == BE64 (PROBE_TYPE)
+	&& val == BE64 (PROBE_VAL64))
       {
 	*elfdata = ELFDATA2MSB;
 	return true;
       }
 
-    if (u->a64[i].a_type == LE64 (PROBE_TYPE)
-	&& u->a64[i].a_un.a_val == LE64 (PROBE_VAL64))
+    if (type == LE64 (PROBE_TYPE)
+	&& val == LE64 (PROBE_VAL64))
       {
 	*elfdata = ELFDATA2LSB;
 	return true;
@@ -246,7 +223,10 @@ addrsize (uint_fast8_t elfclass)
 }
 
 /* Report a module for each struct link_map in the linked list at r_map
-   in the struct r_debug at R_DEBUG_VADDR.
+   in the struct r_debug at R_DEBUG_VADDR.  For r_debug_info description
+   see dwfl_link_map_report in libdwflP.h.  If R_DEBUG_INFO is not NULL then no
+   modules get added to DWFL, caller has to add them from filled in
+   R_DEBUG_INFO.
 
    For each link_map entry, if an existing module resides at its address,
    this just modifies that module's name and suggested file name.  If
@@ -258,7 +238,8 @@ static int
 report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
 		Dwfl *dwfl, GElf_Addr r_debug_vaddr,
 		Dwfl_Memory_Callback *memory_callback,
-		void *memory_callback_arg)
+		void *memory_callback_arg,
+		struct r_debug_info *r_debug_info)
 {
   /* Skip r_version, to aligned r_map field.  */
   GElf_Addr read_vaddr = r_debug_vaddr + addrsize (elfclass);
@@ -340,7 +321,11 @@ report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
       if (read_addrs (next, 4))
 	return release_buffer (-1);
 
-      GElf_Addr l_addr = addrs[0];
+      /* Unused: l_addr is the difference between the address in memory
+         and the ELF file when the core was created. We need to
+         recalculate the difference below because the ELF file we use
+         might be differently pre-linked.  */
+      // GElf_Addr l_addr = addrs[0];
       GElf_Addr l_name = addrs[1];
       GElf_Addr l_ld = addrs[2];
       next = addrs[3];
@@ -373,42 +358,117 @@ report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
       if (name != NULL && name[0] == '\0')
 	name = NULL;
 
-      /* If content-sniffing already reported a module covering
-	 the same area, find that existing module to adjust.
-	 The l_ld address is the only one we know for sure
-	 to be within the module's own segments (its .dynamic).  */
-      Dwfl_Module *mod = INTUSE(dwfl_addrmodule) (dwfl, l_ld);
-      if (mod != NULL)
+      if (iterations == 1 && dwfl->executable_for_core != NULL)
+	name = dwfl->executable_for_core;
+
+      struct r_debug_info_module *r_debug_info_module = NULL;
+      if (r_debug_info != NULL)
 	{
-	  /* We have a module.  We can give it a better name from l_name.  */
-	  if (name != NULL && mod->name[0] == '[')
+	  /* Save link map information about valid shared library (or
+	     executable) which has not been found on disk.  */
+	  const char *name1 = name == NULL ? "" : name;
+	  r_debug_info_module = malloc (sizeof (*r_debug_info_module)
+					+ strlen (name1) + 1);
+	  if (r_debug_info_module == NULL)
+	    return release_buffer (result);
+	  r_debug_info_module->fd = -1;
+	  r_debug_info_module->elf = NULL;
+	  r_debug_info_module->l_ld = l_ld;
+	  r_debug_info_module->start = 0;
+	  r_debug_info_module->end = 0;
+	  r_debug_info_module->disk_file_has_build_id = false;
+	  strcpy (r_debug_info_module->name, name1);
+	  r_debug_info_module->next = r_debug_info->module;
+	  r_debug_info->module = r_debug_info_module;
+	}
+
+      Dwfl_Module *mod = NULL;
+      if (name != NULL)
+	{
+	  /* This code is mostly inlined dwfl_report_elf.  */
+	  // XXX hook for sysroot
+	  int fd = open64 (name, O_RDONLY);
+	  if (fd >= 0)
 	    {
-	      char *newname = strdup (basename (name));
-	      if (newname != NULL)
+	      Elf *elf;
+	      Dwfl_Error error = __libdw_open_file (&fd, &elf, true, false);
+	      GElf_Addr elf_dynamic_vaddr;
+	      if (error == DWFL_E_NOERROR
+		  && __libdwfl_dynamic_vaddr_get (elf, &elf_dynamic_vaddr))
 		{
-		  free (mod->name);
-		  mod->name = newname;
+		  const void *build_id_bits;
+		  GElf_Addr build_id_elfaddr;
+		  int build_id_len;
+		  bool valid = true;
+
+		  if (__libdwfl_find_elf_build_id (NULL, elf, &build_id_bits,
+						   &build_id_elfaddr,
+						   &build_id_len) > 0
+		      && build_id_elfaddr != 0)
+		    {
+		      if (r_debug_info_module != NULL)
+			r_debug_info_module->disk_file_has_build_id = true;
+		      GElf_Addr build_id_vaddr = (build_id_elfaddr
+						  - elf_dynamic_vaddr + l_ld);
+
+		      release_buffer (0);
+		      int segndx = INTUSE(dwfl_addrsegment) (dwfl,
+							     build_id_vaddr,
+							     NULL);
+		      if (! (*memory_callback) (dwfl, segndx,
+						&buffer, &buffer_available,
+						build_id_vaddr, build_id_len,
+						memory_callback_arg))
+			{
+			  /* File has valid build-id which cannot be read from
+			     memory.  This happens for core files without bit 4
+			     (0x10) set in Linux /proc/PID/coredump_filter.  */
+			}
+		      else
+			{
+			  if (memcmp (build_id_bits, buffer, build_id_len) != 0)
+			    /* File has valid build-id which does not match
+			       the one in memory.  */
+			    valid = false;
+			  release_buffer (0);
+			}
+		    }
+
+		  if (valid)
+		    {
+		      // It is like l_addr but it handles differently prelinked
+		      // files at core dumping vs. core loading time.
+		      GElf_Addr base = l_ld - elf_dynamic_vaddr;
+		      if (r_debug_info_module == NULL)
+			{
+			  // XXX hook for sysroot
+			  mod = __libdwfl_report_elf (dwfl, basename (name),
+						      name, fd, elf, base,
+						      true, true);
+			  if (mod != NULL)
+			    {
+			      elf = NULL;
+			      fd = -1;
+			    }
+			}
+		      else if (__libdwfl_elf_address_range (elf, base, true,
+							    true, NULL, NULL,
+						    &r_debug_info_module->start,
+						    &r_debug_info_module->end,
+							    NULL, NULL))
+			{
+			  r_debug_info_module->elf = elf;
+			  r_debug_info_module->fd = fd;
+			  elf = NULL;
+			  fd = -1;
+			}
+		    }
+		  if (elf != NULL)
+		    elf_end (elf);
+		  if (fd != -1)
+		    close (fd);
 		}
 	    }
-
-	  if (name == NULL && mod->name[0] == '/')
-	    name = mod->name;
-
-	  /* If we don't have a file for it already, we can pre-install
-	     the full file name from l_name.  Opening the file by this
-	     name will be the fallback when no build ID match is found.
-	     XXX hook for sysroot */
-	  if (name != NULL && mod->main.name == NULL)
-	    mod->main.name = strdup (name);
-	}
-      else if (name != NULL)
-	{
-	  /* We have to find the file's phdrs to compute along with l_addr
-	     what its runtime address boundaries are.  */
-
-	  // XXX hook for sysroot
-	  mod = INTUSE(dwfl_report_elf) (dwfl, basename (name),
-					 name, -1, l_addr);
 	}
 
       if (mod != NULL)
@@ -473,7 +533,11 @@ consider_executable (Dwfl_Module *mod, GElf_Addr at_phdr, GElf_Addr at_entry,
      address where &r_debug was written at runtime.  */
   GElf_Xword align = mod->dwfl->segment_align;
   GElf_Addr d_val_vaddr = 0;
-  for (uint_fast16_t i = 0; i < ehdr.e_phnum; ++i)
+  size_t phnum;
+  if (elf_getphdrnum (mod->main.elf, &phnum) != 0)
+    return 0;
+
+  for (size_t i = 0; i < phnum; ++i)
     {
       GElf_Phdr phdr_mem;
       GElf_Phdr *phdr = gelf_getphdr (mod->main.elf, i, &phdr_mem);
@@ -625,7 +689,8 @@ find_executable (Dwfl *dwfl, GElf_Addr at_phdr, GElf_Addr at_entry,
 int
 dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t auxv_size,
 		      Dwfl_Memory_Callback *memory_callback,
-		      void *memory_callback_arg)
+		      void *memory_callback_arg,
+		      struct r_debug_info *r_debug_info)
 {
   GElf_Addr r_debug_vaddr = 0;
 
@@ -639,29 +704,32 @@ dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t auxv_size,
       GElf_Xword phent = 0;
       GElf_Xword phnum = 0;
 
-#define AUXV_SCAN(NN, BL) do					\
-	{							\
-	  const Elf##NN##_auxv_t *av = auxv;			\
-	  for (size_t i = 0; i < auxv_size / sizeof av[0]; ++i)	\
-	    {							\
-	      Elf##NN##_Addr val = BL##NN (av[i].a_un.a_val);	\
-	      if (av[i].a_type == BL##NN (AT_ENTRY))		\
-		entry = val;					\
-	      else if (av[i].a_type == BL##NN (AT_PHDR))	\
-		phdr = val;					\
-	      else if (av[i].a_type == BL##NN (AT_PHNUM))	\
-		phnum = val;					\
-	      else if (av[i].a_type == BL##NN (AT_PHENT))	\
-		phent = val;					\
-	      else if (av[i].a_type == BL##NN (AT_PAGESZ))	\
-		{						\
-		  if (val > 1					\
-		      && (dwfl->segment_align == 0		\
-			  || val < dwfl->segment_align))	\
-		    dwfl->segment_align = val;			\
-		}						\
-	    }							\
-	}							\
+#define READ_AUXV32(ptr)	read_4ubyte_unaligned_noncvt (ptr)
+#define READ_AUXV64(ptr)	read_8ubyte_unaligned_noncvt (ptr)
+#define AUXV_SCAN(NN, BL) do                                            \
+	{                                                               \
+	  const Elf##NN##_auxv_t *av = auxv;                            \
+	  for (size_t i = 0; i < auxv_size / sizeof av[0]; ++i)         \
+	    {                                                           \
+              uint##NN##_t type = READ_AUXV##NN (&av[i].a_type);        \
+              uint##NN##_t val = BL##NN (READ_AUXV##NN (&av[i].a_un.a_val)); \
+	      if (type == BL##NN (AT_ENTRY))                            \
+		entry = val;                                            \
+	      else if (type == BL##NN (AT_PHDR))                        \
+		phdr = val;                                             \
+	      else if (type == BL##NN (AT_PHNUM))                       \
+		phnum = val;                                            \
+	      else if (type == BL##NN (AT_PHENT))                       \
+		phent = val;                                            \
+	      else if (type == BL##NN (AT_PAGESZ))                      \
+		{                                                       \
+		  if (val > 1                                           \
+		      && (dwfl->segment_align == 0                      \
+			  || val < dwfl->segment_align))                \
+		    dwfl->segment_align = val;                          \
+		}                                                       \
+	    }                                                           \
+	}                                                               \
       while (0)
 
       if (elfclass == ELFCLASS32)
@@ -720,8 +788,73 @@ dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t auxv_size,
 	      .d_size = phnum * phent,
 	      .d_buf = NULL
 	    };
-	  if ((*memory_callback) (dwfl, phdr_segndx, &in.d_buf, &in.d_size,
-				  phdr, phnum * phent, memory_callback_arg))
+	  bool in_ok = (*memory_callback) (dwfl, phdr_segndx, &in.d_buf,
+					   &in.d_size, phdr, phnum * phent,
+					   memory_callback_arg);
+	  if (! in_ok && dwfl->executable_for_core != NULL)
+	    {
+	      /* AUXV -> PHDR -> DYNAMIC
+		 Both AUXV and DYNAMIC should be always present in a core file.
+		 PHDR may be missing in core file, try to read it from
+		 EXECUTABLE_FOR_CORE to find where DYNAMIC is located in the
+		 core file.  */
+
+	      int fd = open (dwfl->executable_for_core, O_RDONLY);
+	      Elf *elf;
+	      Dwfl_Error error = DWFL_E_ERRNO;
+	      if (fd != -1)
+		error = __libdw_open_file (&fd, &elf, true, false);
+	      if (error != DWFL_E_NOERROR)
+		{
+		  __libdwfl_seterrno (error);
+		  return false;
+		}
+	      GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
+	      if (ehdr == NULL)
+		{
+		  elf_end (elf);
+		  close (fd);
+		  __libdwfl_seterrno (DWFL_E_LIBELF);
+		  return false;
+		}
+	      size_t e_phnum;
+	      if (elf_getphdrnum (elf, &e_phnum) != 0)
+		{
+		  elf_end (elf);
+		  close (fd);
+		  __libdwfl_seterrno (DWFL_E_LIBELF);
+		  return false;
+		}
+	      if (e_phnum != phnum || ehdr->e_phentsize != phent)
+		{
+		  elf_end (elf);
+		  close (fd);
+		  __libdwfl_seterrno (DWFL_E_BADELF);
+		  return false;
+		}
+	      off_t off = ehdr->e_phoff;
+	      assert (in.d_buf == NULL);
+	      assert (in.d_size == phnum * phent);
+	      in.d_buf = malloc (in.d_size);
+	      if (unlikely (in.d_buf == NULL))
+		{
+		  elf_end (elf);
+		  close (fd);
+		  __libdwfl_seterrno (DWFL_E_NOMEM);
+		  return false;
+		}
+	      ssize_t nread = pread_retry (fd, in.d_buf, in.d_size, off);
+	      elf_end (elf);
+	      close (fd);
+	      if (nread != (ssize_t) in.d_size)
+		{
+		  free (in.d_buf);
+		  __libdwfl_seterrno (DWFL_E_ERRNO);
+		  return false;
+		}
+	      in_ok = true;
+	    }
+	  if (in_ok)
 	    {
 	      union
 	      {
@@ -883,6 +1016,6 @@ dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t auxv_size,
 
   /* Now we can follow the dynamic linker's library list.  */
   return report_r_debug (elfclass, elfdata, dwfl, r_debug_vaddr,
-			 &integrated_memory_callback, &mcb);
+			 &integrated_memory_callback, &mcb, r_debug_info);
 }
 INTDEF (dwfl_link_map_report)
diff --git a/src/libdwfl/linux-core-attach.c b/src/libdwfl/linux-core-attach.c
new file mode 100644
index 00000000..5a7b3b3d
--- /dev/null
+++ b/src/libdwfl/linux-core-attach.c
@@ -0,0 +1,427 @@
+/* Get Dwarf Frame state for target core file.
+   Copyright (C) 2013, 2014 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include "libdwflP.h"
+#include <fcntl.h>
+#include "system.h"
+
+#include "../libdw/memory-access.h"
+
+#ifndef MIN
+# define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+struct core_arg
+{
+  Elf *core;
+  Elf_Data *note_data;
+  size_t thread_note_offset;
+  Ebl *ebl;
+};
+
+struct thread_arg
+{
+  struct core_arg *core_arg;
+  size_t note_offset;
+};
+
+static bool
+core_memory_read (Dwfl *dwfl, Dwarf_Addr addr, Dwarf_Word *result,
+		  void *dwfl_arg)
+{
+  Dwfl_Process *process = dwfl->process;
+  struct core_arg *core_arg = dwfl_arg;
+  Elf *core = core_arg->core;
+  assert (core != NULL);
+  static size_t phnum;
+  if (elf_getphdrnum (core, &phnum) < 0)
+    {
+      __libdwfl_seterrno (DWFL_E_LIBELF);
+      return false;
+    }
+  for (size_t cnt = 0; cnt < phnum; ++cnt)
+    {
+      GElf_Phdr phdr_mem, *phdr = gelf_getphdr (core, cnt, &phdr_mem);
+      if (phdr == NULL || phdr->p_type != PT_LOAD)
+	continue;
+      /* Bias is zero here, a core file itself has no bias.  */
+      GElf_Addr start = __libdwfl_segment_start (dwfl, phdr->p_vaddr);
+      GElf_Addr end = __libdwfl_segment_end (dwfl,
+					     phdr->p_vaddr + phdr->p_memsz);
+      unsigned bytes = ebl_get_elfclass (process->ebl) == ELFCLASS64 ? 8 : 4;
+      if (addr < start || addr + bytes > end)
+	continue;
+      Elf_Data *data;
+      data = elf_getdata_rawchunk (core, phdr->p_offset + addr - start,
+				   bytes, ELF_T_ADDR);
+      if (data == NULL)
+	{
+	  __libdwfl_seterrno (DWFL_E_LIBELF);
+	  return false;
+	}
+      assert (data->d_size == bytes);
+      if (bytes == 8)
+	*result = read_8ubyte_unaligned_noncvt (data->d_buf);
+      else
+	*result = read_4ubyte_unaligned_noncvt (data->d_buf);
+      return true;
+    }
+  __libdwfl_seterrno (DWFL_E_ADDR_OUTOFRANGE);
+  return false;
+}
+
+static pid_t
+core_next_thread (Dwfl *dwfl __attribute__ ((unused)), void *dwfl_arg,
+		  void **thread_argp)
+{
+  struct core_arg *core_arg = dwfl_arg;
+  Elf *core = core_arg->core;
+  GElf_Nhdr nhdr;
+  size_t name_offset;
+  size_t desc_offset;
+  Elf_Data *note_data = core_arg->note_data;
+  size_t offset;
+
+  struct thread_arg *thread_arg;
+  if (*thread_argp == NULL)
+    {
+      core_arg->thread_note_offset = 0;
+      thread_arg = malloc (sizeof (*thread_arg));
+      if (thread_arg == NULL)
+	{
+	  __libdwfl_seterrno (DWFL_E_NOMEM);
+	  return -1;
+	}
+      thread_arg->core_arg = core_arg;
+      *thread_argp = thread_arg;
+    }
+  else
+    thread_arg = (struct thread_arg *) *thread_argp;
+
+  while (offset = core_arg->thread_note_offset, offset < note_data->d_size
+	 && (core_arg->thread_note_offset = gelf_getnote (note_data, offset,
+							  &nhdr, &name_offset,
+							  &desc_offset)) > 0)
+    {
+      /* Do not check NAME for now, help broken Linux kernels.  */
+      const char *name = note_data->d_buf + name_offset;
+      const char *desc = note_data->d_buf + desc_offset;
+      GElf_Word regs_offset;
+      size_t nregloc;
+      const Ebl_Register_Location *reglocs;
+      size_t nitems;
+      const Ebl_Core_Item *items;
+      if (! ebl_core_note (core_arg->ebl, &nhdr, name,
+			   &regs_offset, &nregloc, &reglocs, &nitems, &items))
+	{
+	  /* This note may be just not recognized, skip it.  */
+	  continue;
+	}
+      if (nhdr.n_type != NT_PRSTATUS)
+	continue;
+      const Ebl_Core_Item *item;
+      for (item = items; item < items + nitems; item++)
+	if (strcmp (item->name, "pid") == 0)
+	  break;
+      if (item == items + nitems)
+	continue;
+      uint32_t val32 = read_4ubyte_unaligned_noncvt (desc + item->offset);
+      val32 = (elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB
+		? be32toh (val32) : le32toh (val32));
+      pid_t tid = (int32_t) val32;
+      eu_static_assert (sizeof val32 <= sizeof tid);
+      thread_arg->note_offset = offset;
+      return tid;
+    }
+
+  free (thread_arg);
+  return 0;
+}
+
+static bool
+core_set_initial_registers (Dwfl_Thread *thread, void *thread_arg_voidp)
+{
+  struct thread_arg *thread_arg = thread_arg_voidp;
+  struct core_arg *core_arg = thread_arg->core_arg;
+  Elf *core = core_arg->core;
+  size_t offset = thread_arg->note_offset;
+  GElf_Nhdr nhdr;
+  size_t name_offset;
+  size_t desc_offset;
+  Elf_Data *note_data = core_arg->note_data;
+  size_t nregs = ebl_frame_nregs (core_arg->ebl);
+  assert (nregs > 0);
+  assert (offset < note_data->d_size);
+  size_t getnote_err = gelf_getnote (note_data, offset, &nhdr, &name_offset,
+				     &desc_offset);
+  /* __libdwfl_attach_state_for_core already verified the note is there.  */
+  assert (getnote_err != 0);
+  /* Do not check NAME for now, help broken Linux kernels.  */
+  const char *name = note_data->d_buf + name_offset;
+  const char *desc = note_data->d_buf + desc_offset;
+  GElf_Word regs_offset;
+  size_t nregloc;
+  const Ebl_Register_Location *reglocs;
+  size_t nitems;
+  const Ebl_Core_Item *items;
+  int core_note_err = ebl_core_note (core_arg->ebl, &nhdr, name, &regs_offset,
+				     &nregloc, &reglocs, &nitems, &items);
+  /* __libdwfl_attach_state_for_core already verified the note is there.  */
+  assert (core_note_err != 0);
+  assert (nhdr.n_type == NT_PRSTATUS);
+  const Ebl_Core_Item *item;
+  for (item = items; item < items + nitems; item++)
+    if (strcmp (item->name, "pid") == 0)
+      break;
+  assert (item < items + nitems);
+  pid_t tid;
+  {
+    uint32_t val32 = read_4ubyte_unaligned_noncvt (desc + item->offset);
+    val32 = (elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB
+	     ? be32toh (val32) : le32toh (val32));
+    tid = (int32_t) val32;
+    eu_static_assert (sizeof val32 <= sizeof tid);
+  }
+  /* core_next_thread already found this TID there.  */
+  assert (tid == INTUSE(dwfl_thread_tid) (thread));
+  for (item = items; item < items + nitems; item++)
+    if (item->pc_register)
+      break;
+  if (item < items + nitems)
+    {
+      Dwarf_Word pc;
+      switch (gelf_getclass (core) == ELFCLASS32 ? 32 : 64)
+      {
+	case 32:;
+	  uint32_t val32 = read_4ubyte_unaligned_noncvt (desc + item->offset);
+	  val32 = (elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB
+		   ? be32toh (val32) : le32toh (val32));
+	  /* Do a host width conversion.  */
+	  pc = val32;
+	  break;
+	case 64:;
+	  uint64_t val64 = read_8ubyte_unaligned_noncvt (desc + item->offset);
+	  val64 = (elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB
+		   ? be64toh (val64) : le64toh (val64));
+	  pc = val64;
+	  break;
+	default:
+	  abort ();
+      }
+      INTUSE(dwfl_thread_state_register_pc) (thread, pc);
+    }
+  desc += regs_offset;
+  for (size_t regloci = 0; regloci < nregloc; regloci++)
+    {
+      const Ebl_Register_Location *regloc = reglocs + regloci;
+      // Iterate even regs out of NREGS range so that we can find pc_register.
+      if (regloc->bits != 32 && regloc->bits != 64)
+	continue;
+      const char *reg_desc = desc + regloc->offset;
+      for (unsigned regno = regloc->regno;
+	   regno < regloc->regno + (regloc->count ?: 1U);
+	   regno++)
+	{
+	  /* PPC provides DWARF register 65 irrelevant for
+	     CFI which clashes with register 108 (LR) we need.
+	     LR (108) is provided earlier (in NT_PRSTATUS) than the # 65.
+	     FIXME: It depends now on their order in core notes.
+	     FIXME: It uses private function.  */
+	  if (regno < nregs
+	      && __libdwfl_frame_reg_get (thread->unwound, regno, NULL))
+	    continue;
+	  Dwarf_Word val;
+	  switch (regloc->bits)
+	  {
+	    case 32:;
+	      uint32_t val32 = read_4ubyte_unaligned_noncvt (reg_desc);
+	      reg_desc += sizeof val32;
+	      val32 = (elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB
+		       ? be32toh (val32) : le32toh (val32));
+	      /* Do a host width conversion.  */
+	      val = val32;
+	      break;
+	    case 64:;
+	      uint64_t val64 = read_8ubyte_unaligned_noncvt (reg_desc);
+	      reg_desc += sizeof val64;
+	      val64 = (elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB
+		       ? be64toh (val64) : le64toh (val64));
+	      assert (sizeof (*thread->unwound->regs) == sizeof val64);
+	      val = val64;
+	      break;
+	    default:
+	      abort ();
+	  }
+	  /* Registers not valid for CFI are just ignored.  */
+	  if (regno < nregs)
+	    INTUSE(dwfl_thread_state_registers) (thread, regno, 1, &val);
+	  if (regloc->pc_register)
+	    INTUSE(dwfl_thread_state_register_pc) (thread, val);
+	  reg_desc += regloc->pad;
+	}
+    }
+  return true;
+}
+
+static void
+core_detach (Dwfl *dwfl __attribute__ ((unused)), void *dwfl_arg)
+{
+  struct core_arg *core_arg = dwfl_arg;
+  ebl_closebackend (core_arg->ebl);
+  free (core_arg);
+}
+
+static const Dwfl_Thread_Callbacks core_thread_callbacks =
+{
+  core_next_thread,
+  NULL, /* get_thread */
+  core_memory_read,
+  core_set_initial_registers,
+  core_detach,
+  NULL, /* core_thread_detach */
+};
+
+int
+dwfl_core_file_attach (Dwfl *dwfl, Elf *core)
+{
+  Dwfl_Error err = DWFL_E_NOERROR;
+  Ebl *ebl = ebl_openbackend (core);
+  if (ebl == NULL)
+    {
+      err = DWFL_E_LIBEBL;
+    fail_err:
+      if (dwfl->process == NULL && dwfl->attacherr == DWFL_E_NOERROR)
+	dwfl->attacherr = __libdwfl_canon_error (err);
+      __libdwfl_seterrno (err);
+      return -1;
+    }
+  size_t nregs = ebl_frame_nregs (ebl);
+  if (nregs == 0)
+    {
+      err = DWFL_E_NO_UNWIND;
+    fail:
+      ebl_closebackend (ebl);
+      goto fail_err;
+    }
+  GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (core, &ehdr_mem);
+  if (ehdr == NULL)
+    {
+      err = DWFL_E_LIBELF;
+      goto fail;
+    }
+  if (ehdr->e_type != ET_CORE)
+    {
+      err = DWFL_E_NO_CORE_FILE;
+      goto fail;
+    }
+  size_t phnum;
+  if (elf_getphdrnum (core, &phnum) < 0)
+    {
+      err = DWFL_E_LIBELF;
+      goto fail;
+    }
+  pid_t pid = -1;
+  Elf_Data *note_data = NULL;
+  for (size_t cnt = 0; cnt < phnum; ++cnt)
+    {
+      GElf_Phdr phdr_mem, *phdr = gelf_getphdr (core, cnt, &phdr_mem);
+      if (phdr != NULL && phdr->p_type == PT_NOTE)
+	{
+	  note_data = elf_getdata_rawchunk (core, phdr->p_offset,
+					    phdr->p_filesz, ELF_T_NHDR);
+	  break;
+	}
+    }
+  if (note_data == NULL)
+    {
+      err = DWFL_E_LIBELF;
+      goto fail;
+    }
+  size_t offset = 0;
+  GElf_Nhdr nhdr;
+  size_t name_offset;
+  size_t desc_offset;
+  while (offset < note_data->d_size
+	 && (offset = gelf_getnote (note_data, offset,
+				    &nhdr, &name_offset, &desc_offset)) > 0)
+    {
+      /* Do not check NAME for now, help broken Linux kernels.  */
+      const char *name = note_data->d_buf + name_offset;
+      const char *desc = note_data->d_buf + desc_offset;
+      GElf_Word regs_offset;
+      size_t nregloc;
+      const Ebl_Register_Location *reglocs;
+      size_t nitems;
+      const Ebl_Core_Item *items;
+      if (! ebl_core_note (ebl, &nhdr, name,
+			   &regs_offset, &nregloc, &reglocs, &nitems, &items))
+	{
+	  /* This note may be just not recognized, skip it.  */
+	  continue;
+	}
+      if (nhdr.n_type != NT_PRPSINFO)
+	continue;
+      const Ebl_Core_Item *item;
+      for (item = items; item < items + nitems; item++)
+	if (strcmp (item->name, "pid") == 0)
+	  break;
+      if (item == items + nitems)
+	continue;
+      uint32_t val32 = read_4ubyte_unaligned_noncvt (desc + item->offset);
+      val32 = (elf_getident (core, NULL)[EI_DATA] == ELFDATA2MSB
+		? be32toh (val32) : le32toh (val32));
+      pid = (int32_t) val32;
+      eu_static_assert (sizeof val32 <= sizeof pid);
+      break;
+    }
+  if (pid == -1)
+    {
+      /* No valid NT_PRPSINFO recognized in this CORE.  */
+      err = DWFL_E_BADELF;
+      goto fail;
+    }
+  struct core_arg *core_arg = malloc (sizeof *core_arg);
+  if (core_arg == NULL)
+    {
+      err = DWFL_E_NOMEM;
+      goto fail;
+    }
+  core_arg->core = core;
+  core_arg->note_data = note_data;
+  core_arg->thread_note_offset = 0;
+  core_arg->ebl = ebl;
+  if (! INTUSE(dwfl_attach_state) (dwfl, core, pid, &core_thread_callbacks,
+				   core_arg))
+    {
+      free (core_arg);
+      ebl_closebackend (ebl);
+      return -1;
+    }
+  return pid;
+}
+INTDEF (dwfl_core_file_attach)
diff --git a/src/libdwfl/linux-kernel-modules.c b/src/libdwfl/linux-kernel-modules.c
index e2392722..8f2dab3a 100644
--- a/src/libdwfl/linux-kernel-modules.c
+++ b/src/libdwfl/linux-kernel-modules.c
@@ -1,58 +1,35 @@
 /* Standard libdwfl callbacks for debugging the running Linux kernel.
-   Copyright (C) 2005-2011 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2011, 2013, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 /* We include this before config.h because it can't handle _FILE_OFFSET_BITS.
    Everything we need here is fine if its declarations just come first.  */
 
-/* TODO ANDROID - defined in AndroidConfig.h. */
-#undef _FILE_OFFSET_BITS
-
+#undef _FILE_OFFSET_BITS  // Undo the damage caused by AndroidConfig.h.
 #include <fts.h>
 
 #include <config.h>
@@ -112,23 +89,22 @@ try_kernel_name (Dwfl *dwfl, char **fname, bool try_debug)
 
   if (fd < 0)
     {
-      char *debugfname = NULL;
       Dwfl_Module fakemod = { .dwfl = dwfl };
       /* First try the file's unadorned basename as DEBUGLINK_FILE,
 	 to look for "vmlinux" files.  */
       fd = INTUSE(dwfl_standard_find_debuginfo) (&fakemod, NULL, NULL, 0,
 						 *fname, basename (*fname), 0,
-						 &debugfname);
+						 &fakemod.debug.name);
       if (fd < 0 && try_debug)
 	/* Next, let the call use the default of basename + ".debug",
 	   to look for "vmlinux.debug" files.  */
 	fd = INTUSE(dwfl_standard_find_debuginfo) (&fakemod, NULL, NULL, 0,
 						   *fname, NULL, 0,
-						   &debugfname);
-      if (debugfname != NULL)
+						   &fakemod.debug.name);
+      if (fakemod.debug.name != NULL)
 	{
 	  free (*fname);
-	  *fname = debugfname;
+	  *fname = fakemod.debug.name;
 	}
     }
 
@@ -240,8 +216,14 @@ report_kernel (Dwfl *dwfl, const char **release,
 
       if (report)
 	{
+	  /* Note that on some architectures (e.g. x86_64) the vmlinux
+	     is ET_EXEC, while on others (e.g. ppc64) it is ET_DYN.
+	     In both cases the phdr p_vaddr load address will be non-zero.
+	     We want the image to be placed as if it was ET_DYN, so
+	     pass true for add_p_vaddr which will do the right thing
+	     (in combination with a zero base) in either case.  */
 	  Dwfl_Module *mod = INTUSE(dwfl_report_elf) (dwfl, KERNEL_MODNAME,
-						      fname, fd, 0);
+						      fname, fd, 0, true);
 	  if (mod == NULL)
 	    result = -1;
 	  else
@@ -249,12 +231,12 @@ report_kernel (Dwfl *dwfl, const char **release,
 	    mod->e_type = ET_DYN;
 	}
 
+      free (fname);
+
       if (!report || result < 0)
 	close (fd);
     }
 
-  free (fname);
-
   return result;
 }
 
@@ -269,9 +251,10 @@ report_kernel_archive (Dwfl *dwfl, const char **release,
     return result;
 
   char *archive;
-  if (unlikely ((*release)[0] == '/'
-		? asprintf (&archive, "%s/debug.a", *release)
-		: asprintf (&archive, MODULEDIRFMT "/debug.a", *release)) < 0)
+  int res = (((*release)[0] == '/')
+	     ? asprintf (&archive, "%s/debug.a", *release)
+	     : asprintf (&archive, MODULEDIRFMT "/debug.a", *release));
+  if (unlikely (res < 0))
     return ENOMEM;
 
   int fd = try_kernel_name (dwfl, &archive, false);
@@ -320,6 +303,9 @@ check_suffix (const FTSENT *f, size_t namelen)
 #if USE_BZLIB
   TRY (".ko.bz2");
 #endif
+#if USE_LZMA
+  TRY (".ko.xz");
+#endif
 
   return 0;
 
diff --git a/src/libdwfl/linux-pid-attach.c b/src/libdwfl/linux-pid-attach.c
new file mode 100644
index 00000000..ae717028
--- /dev/null
+++ b/src/libdwfl/linux-pid-attach.c
@@ -0,0 +1,475 @@
+/* Get Dwarf Frame state for target live PID process.
+   Copyright (C) 2013, 2014 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include "libdwflP.h"
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+#include <dirent.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifndef MAX
+# define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+#ifdef __linux__
+
+static bool
+linux_proc_pid_is_stopped (pid_t pid)
+{
+  char buffer[64];
+  FILE *procfile;
+  bool retval, have_state;
+
+  snprintf (buffer, sizeof (buffer), "/proc/%ld/status", (long) pid);
+  procfile = fopen (buffer, "r");
+  if (procfile == NULL)
+    return false;
+
+  have_state = false;
+  while (fgets (buffer, sizeof (buffer), procfile) != NULL)
+    if (strncmp (buffer, "State:", 6) == 0)
+      {
+	have_state = true;
+	break;
+      }
+  retval = (have_state && strstr (buffer, "T (stopped)") != NULL);
+  fclose (procfile);
+  return retval;
+}
+
+bool
+internal_function
+__libdwfl_ptrace_attach (pid_t tid, bool *tid_was_stoppedp)
+{
+  if (ptrace (PTRACE_ATTACH, tid, NULL, NULL) != 0)
+    {
+      __libdwfl_seterrno (DWFL_E_ERRNO);
+      return false;
+    }
+  *tid_was_stoppedp = linux_proc_pid_is_stopped (tid);
+  if (*tid_was_stoppedp)
+    {
+      /* Make sure there is a SIGSTOP signal pending even when the process is
+	 already State: T (stopped).  Older kernels might fail to generate
+	 a SIGSTOP notification in that case in response to our PTRACE_ATTACH
+	 above.  Which would make the waitpid below wait forever.  So emulate
+	 it.  Since there can only be one SIGSTOP notification pending this is
+	 safe.  See also gdb/linux-nat.c linux_nat_post_attach_wait.  */
+      syscall (__NR_tkill, tid, SIGSTOP);
+      ptrace (PTRACE_CONT, tid, NULL, NULL);
+    }
+  for (;;)
+    {
+      int status;
+      if (waitpid (tid, &status, __WALL) != tid || !WIFSTOPPED (status))
+	{
+	  int saved_errno = errno;
+	  ptrace (PTRACE_DETACH, tid, NULL, NULL);
+	  errno = saved_errno;
+	  __libdwfl_seterrno (DWFL_E_ERRNO);
+	  return false;
+	}
+      if (WSTOPSIG (status) == SIGSTOP)
+	break;
+      if (ptrace (PTRACE_CONT, tid, NULL,
+		  (void *) (uintptr_t) WSTOPSIG (status)) != 0)
+	{
+	  int saved_errno = errno;
+	  ptrace (PTRACE_DETACH, tid, NULL, NULL);
+	  errno = saved_errno;
+	  __libdwfl_seterrno (DWFL_E_ERRNO);
+	  return false;
+	}
+    }
+  return true;
+}
+
+static bool
+pid_memory_read (Dwfl *dwfl, Dwarf_Addr addr, Dwarf_Word *result, void *arg)
+{
+  struct __libdwfl_pid_arg *pid_arg = arg;
+  pid_t tid = pid_arg->tid_attached;
+  assert (tid > 0);
+  Dwfl_Process *process = dwfl->process;
+  if (ebl_get_elfclass (process->ebl) == ELFCLASS64)
+    {
+#if SIZEOF_LONG == 8
+      errno = 0;
+      *result = ptrace (PTRACE_PEEKDATA, tid, (void *) (uintptr_t) addr, NULL);
+      return errno == 0;
+#else /* SIZEOF_LONG != 8 */
+      /* This should not happen.  */
+      return false;
+#endif /* SIZEOF_LONG != 8 */
+    }
+#if SIZEOF_LONG == 8
+  /* We do not care about reads unaliged to 4 bytes boundary.
+     But 0x...ffc read of 8 bytes could overrun a page.  */
+  bool lowered = (addr & 4) != 0;
+  if (lowered)
+    addr -= 4;
+#endif /* SIZEOF_LONG == 8 */
+  errno = 0;
+  *result = ptrace (PTRACE_PEEKDATA, tid, (void *) (uintptr_t) addr, NULL);
+  if (errno != 0)
+    return false;
+#if SIZEOF_LONG == 8
+# if BYTE_ORDER == BIG_ENDIAN
+  if (! lowered)
+    *result >>= 32;
+# else
+  if (lowered)
+    *result >>= 32;
+# endif
+#endif /* SIZEOF_LONG == 8 */
+  *result &= 0xffffffff;
+  return true;
+}
+
+static pid_t
+pid_next_thread (Dwfl *dwfl __attribute__ ((unused)), void *dwfl_arg,
+		 void **thread_argp)
+{
+  struct __libdwfl_pid_arg *pid_arg = dwfl_arg;
+  struct dirent *dirent;
+  /* Start fresh on first traversal. */
+  if (*thread_argp == NULL)
+    rewinddir (pid_arg->dir);
+  do
+    {
+      errno = 0;
+      dirent = readdir (pid_arg->dir);
+      if (dirent == NULL)
+	{
+	  if (errno != 0)
+	    {
+	      __libdwfl_seterrno (DWFL_E_ERRNO);
+	      return -1;
+	    }
+	  return 0;
+	}
+    }
+  while (strcmp (dirent->d_name, ".") == 0
+	 || strcmp (dirent->d_name, "..") == 0);
+  char *end;
+  errno = 0;
+  long tidl = strtol (dirent->d_name, &end, 10);
+  if (errno != 0)
+    {
+      __libdwfl_seterrno (DWFL_E_ERRNO);
+      return -1;
+    }
+  pid_t tid = tidl;
+  if (tidl <= 0 || (end && *end) || tid != tidl)
+    {
+      __libdwfl_seterrno (DWFL_E_PARSE_PROC);
+      return -1;
+    }
+  *thread_argp = dwfl_arg;
+  return tid;
+}
+
+/* Just checks that the thread id exists.  */
+static bool
+pid_getthread (Dwfl *dwfl __attribute__ ((unused)), pid_t tid,
+	       void *dwfl_arg, void **thread_argp)
+{
+  *thread_argp = dwfl_arg;
+  if (kill (tid, 0) < 0)
+    {
+      __libdwfl_seterrno (DWFL_E_ERRNO);
+      return false;
+    }
+  return true;
+}
+
+/* Implement the ebl_set_initial_registers_tid setfunc callback.  */
+
+static bool
+pid_thread_state_registers_cb (int firstreg, unsigned nregs,
+			       const Dwarf_Word *regs, void *arg)
+{
+  Dwfl_Thread *thread = (Dwfl_Thread *) arg;
+  if (firstreg < 0)
+    {
+      assert (firstreg == -1);
+      assert (nregs == 1);
+      INTUSE(dwfl_thread_state_register_pc) (thread, *regs);
+      return true;
+    }
+  assert (nregs > 0);
+  return INTUSE(dwfl_thread_state_registers) (thread, firstreg, nregs, regs);
+}
+
+static bool
+pid_set_initial_registers (Dwfl_Thread *thread, void *thread_arg)
+{
+  struct __libdwfl_pid_arg *pid_arg = thread_arg;
+  assert (pid_arg->tid_attached == 0);
+  pid_t tid = INTUSE(dwfl_thread_tid) (thread);
+  if (! pid_arg->assume_ptrace_stopped
+      && ! __libdwfl_ptrace_attach (tid, &pid_arg->tid_was_stopped))
+    return false;
+  pid_arg->tid_attached = tid;
+  Dwfl_Process *process = thread->process;
+  Ebl *ebl = process->ebl;
+  return ebl_set_initial_registers_tid (ebl, tid,
+					pid_thread_state_registers_cb, thread);
+}
+
+static void
+pid_detach (Dwfl *dwfl __attribute__ ((unused)), void *dwfl_arg)
+{
+  struct __libdwfl_pid_arg *pid_arg = dwfl_arg;
+  closedir (pid_arg->dir);
+  free (pid_arg);
+}
+
+void
+internal_function
+__libdwfl_ptrace_detach (pid_t tid, bool tid_was_stopped)
+{
+  /* This handling is needed only on older Linux kernels such as
+     2.6.32-358.23.2.el6.ppc64.  Later kernels such as
+     3.11.7-200.fc19.x86_64 remember the T (stopped) state
+     themselves and no longer need to pass SIGSTOP during
+     PTRACE_DETACH.  */
+  ptrace (PTRACE_DETACH, tid, NULL,
+	  (void *) (intptr_t) (tid_was_stopped ? SIGSTOP : 0));
+}
+
+static void
+pid_thread_detach (Dwfl_Thread *thread, void *thread_arg)
+{
+  struct __libdwfl_pid_arg *pid_arg = thread_arg;
+  pid_t tid = INTUSE(dwfl_thread_tid) (thread);
+  assert (pid_arg->tid_attached == tid);
+  pid_arg->tid_attached = 0;
+  if (! pid_arg->assume_ptrace_stopped)
+    __libdwfl_ptrace_detach (tid, pid_arg->tid_was_stopped);
+}
+
+static const Dwfl_Thread_Callbacks pid_thread_callbacks =
+{
+  pid_next_thread,
+  pid_getthread,
+  pid_memory_read,
+  pid_set_initial_registers,
+  pid_detach,
+  pid_thread_detach,
+};
+
+int
+dwfl_linux_proc_attach (Dwfl *dwfl, pid_t pid, bool assume_ptrace_stopped)
+{
+  char buffer[36];
+  FILE *procfile;
+  int err = 0; /* The errno to return and set for dwfl->attcherr.  */
+
+  /* Make sure to report the actual PID (thread group leader) to
+     dwfl_attach_state.  */
+  snprintf (buffer, sizeof (buffer), "/proc/%ld/status", (long) pid);
+  procfile = fopen (buffer, "r");
+  if (procfile == NULL)
+    {
+      err = errno;
+    fail:
+      if (dwfl->process == NULL && dwfl->attacherr == DWFL_E_NOERROR)
+	{
+	  errno = err;
+	  dwfl->attacherr = __libdwfl_canon_error (DWFL_E_ERRNO);
+	}
+      return err;
+    }
+
+  char *line = NULL;
+  size_t linelen = 0;
+  while (getline (&line, &linelen, procfile) >= 0)
+    if (strncmp (line, "Tgid:", 5) == 0)
+      {
+	errno = 0;
+	char *endptr;
+	long val = strtol (&line[5], &endptr, 10);
+	if ((errno == ERANGE && val == LONG_MAX)
+	    || *endptr != '\n' || val < 0 || val != (pid_t) val)
+	  pid = 0;
+	else
+	  pid = (pid_t) val;
+	break;
+      }
+  free (line);
+  fclose (procfile);
+
+  if (pid == 0)
+    {
+      err = ESRCH;
+      goto fail;
+    }
+
+  char dirname[64];
+  int i = snprintf (dirname, sizeof (dirname), "/proc/%ld/task", (long) pid);
+  assert (i > 0 && i < (ssize_t) sizeof (dirname) - 1);
+  DIR *dir = opendir (dirname);
+  if (dir == NULL)
+    {
+      err = errno;
+      goto fail;
+    }
+  struct __libdwfl_pid_arg *pid_arg = malloc (sizeof *pid_arg);
+  if (pid_arg == NULL)
+    {
+      closedir (dir);
+      err = ENOMEM;
+      goto fail;
+    }
+  pid_arg->dir = dir;
+  pid_arg->tid_attached = 0;
+  pid_arg->assume_ptrace_stopped = assume_ptrace_stopped;
+  if (! INTUSE(dwfl_attach_state) (dwfl, NULL, pid, &pid_thread_callbacks,
+				   pid_arg))
+    {
+      closedir (dir);
+      free (pid_arg);
+      return -1;
+    }
+  return 0;
+}
+INTDEF (dwfl_linux_proc_attach)
+
+struct __libdwfl_pid_arg *
+internal_function
+__libdwfl_get_pid_arg (Dwfl *dwfl)
+{
+  if (dwfl != NULL && dwfl->process != NULL
+      && dwfl->process->callbacks == &pid_thread_callbacks)
+    return (struct __libdwfl_pid_arg *) dwfl->process->callbacks_arg;
+
+  return NULL;
+}
+
+#else	/* __linux__ */
+
+static pid_t
+pid_next_thread (Dwfl *dwfl __attribute__ ((unused)),
+	         void *dwfl_arg __attribute__ ((unused)),
+		 void **thread_argp __attribute__ ((unused)))
+{
+  errno = ENOSYS;
+  __libdwfl_seterrno (DWFL_E_ERRNO);
+  return -1;
+}
+
+static bool
+pid_getthread (Dwfl *dwfl __attribute__ ((unused)),
+	       pid_t tid __attribute__ ((unused)),
+	       void *dwfl_arg __attribute__ ((unused)),
+	       void **thread_argp __attribute__ ((unused)))
+{
+  errno = ENOSYS;
+  __libdwfl_seterrno (DWFL_E_ERRNO);
+  return false;
+}
+
+bool
+internal_function
+__libdwfl_ptrace_attach (pid_t tid __attribute__ ((unused)),
+			 bool *tid_was_stoppedp __attribute__ ((unused)))
+{
+  errno = ENOSYS;
+  __libdwfl_seterrno (DWFL_E_ERRNO);
+  return false;
+}
+
+static bool
+pid_memory_read (Dwfl *dwfl __attribute__ ((unused)),
+                 Dwarf_Addr addr __attribute__ ((unused)),
+	         Dwarf_Word *result __attribute__ ((unused)),
+	         void *arg __attribute__ ((unused)))
+{
+  errno = ENOSYS;
+  __libdwfl_seterrno (DWFL_E_ERRNO);
+  return false;
+}
+
+static bool
+pid_set_initial_registers (Dwfl_Thread *thread __attribute__ ((unused)),
+			   void *thread_arg __attribute__ ((unused)))
+{
+  errno = ENOSYS;
+  __libdwfl_seterrno (DWFL_E_ERRNO);
+  return false;
+}
+
+static void
+pid_detach (Dwfl *dwfl __attribute__ ((unused)),
+	    void *dwfl_arg __attribute__ ((unused)))
+{
+}
+
+void
+internal_function
+__libdwfl_ptrace_detach (pid_t tid __attribute__ ((unused)),
+			 bool tid_was_stopped __attribute__ ((unused)))
+{
+}
+
+static void
+pid_thread_detach (Dwfl_Thread *thread __attribute__ ((unused)),
+		  void *thread_arg __attribute__ ((unused)))
+{
+}
+
+static const Dwfl_Thread_Callbacks pid_thread_callbacks =
+{
+  pid_next_thread,
+  pid_getthread,
+  pid_memory_read,
+  pid_set_initial_registers,
+  pid_detach,
+  pid_thread_detach,
+};
+
+int
+dwfl_linux_proc_attach (Dwfl *dwfl __attribute__ ((unused)),
+			pid_t pid __attribute__ ((unused)),
+			bool assume_ptrace_stopped __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+INTDEF (dwfl_linux_proc_attach)
+
+struct __libdwfl_pid_arg *
+internal_function
+__libdwfl_get_pid_arg (Dwfl *dwfl __attribute__ ((unused)))
+{
+  return NULL;
+}
+
+#endif /* ! __linux __ */
+
diff --git a/src/libdwfl/linux-proc-maps.c b/src/libdwfl/linux-proc-maps.c
index 8504a5f3..d0858342 100644
--- a/src/libdwfl/linux-proc-maps.c
+++ b/src/libdwfl/linux-proc-maps.c
@@ -1,55 +1,35 @@
 /* Standard libdwfl callbacks for debugging a live Linux process.
-   Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2010, 2013, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <inttypes.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdio_ext.h>
@@ -60,14 +40,53 @@
 #include <unistd.h>
 #include <assert.h>
 #include <endian.h>
+#include "system.h"
 
 
 #define PROCMAPSFMT	"/proc/%d/maps"
 #define PROCMEMFMT	"/proc/%d/mem"
 #define PROCAUXVFMT	"/proc/%d/auxv"
+#define PROCEXEFMT	"/proc/%d/exe"
+
+
+/* Return ELFCLASS64 or ELFCLASS32 for the main ELF executable.  Return
+   ELFCLASSNONE for an error.  */
+
+static unsigned char
+get_pid_class (pid_t pid)
+{
+  char *fname;
+  if (asprintf (&fname, PROCEXEFMT, pid) < 0)
+    return ELFCLASSNONE;
+
+  int fd = open64 (fname, O_RDONLY);
+  free (fname);
+  if (fd < 0)
+    return ELFCLASSNONE;
+
+  unsigned char buf[EI_CLASS + 1];
+  ssize_t nread = pread_retry (fd, &buf, sizeof buf, 0);
+  close (fd);
+  if (nread != sizeof buf || buf[EI_MAG0] != ELFMAG0
+      || buf[EI_MAG1] != ELFMAG1 || buf[EI_MAG2] != ELFMAG2
+      || buf[EI_MAG3] != ELFMAG3
+      || (buf[EI_CLASS] != ELFCLASS64 && buf[EI_CLASS] != ELFCLASS32))
+    return ELFCLASSNONE;
 
+  return buf[EI_CLASS];
+}
+
+/* Search /proc/PID/auxv for the AT_SYSINFO_EHDR tag.
+
+   It would be easiest to call get_pid_class and parse everything according to
+   the 32-bit or 64-bit class.  But this would bring the overhead of syscalls
+   to open and read the "/proc/%d/exe" file.
 
-/* Search /proc/PID/auxv for the AT_SYSINFO_EHDR tag.  */
+   Therefore this function tries to parse the "/proc/%d/auxv" content both
+   ways, as if it were the 32-bit format and also if it were the 64-bit format.
+   Only if it gives some valid data in both cases get_pid_class gets called.
+   In most cases only one of the format bit sizes gives valid data and the
+   get_pid_class call overhead can be saved.  */
 
 static int
 grovel_auxv (pid_t pid, Dwfl *dwfl, GElf_Addr *sysinfo_ehdr)
@@ -81,61 +100,79 @@ grovel_auxv (pid_t pid, Dwfl *dwfl, GElf_Addr *sysinfo_ehdr)
   if (fd < 0)
     return errno == ENOENT ? 0 : errno;
 
+  GElf_Addr sysinfo_ehdr64 = 0;
+  GElf_Addr sysinfo_ehdr32 = 0;
+  GElf_Addr segment_align64 = dwfl->segment_align;
+  GElf_Addr segment_align32 = dwfl->segment_align;
+  off_t offset = 0;
   ssize_t nread;
+  union
+  {
+    Elf64_auxv_t a64[64];
+    Elf32_auxv_t a32[128];
+  } d;
   do
     {
-      union
-      {
-	char buffer[sizeof (long int) * 2 * 64];
-	Elf64_auxv_t a64[sizeof (long int) * 2 * 64 / sizeof (Elf64_auxv_t)];
-	Elf32_auxv_t a32[sizeof (long int) * 2 * 32 / sizeof (Elf32_auxv_t)];
-      } d;
-      nread = read (fd, &d, sizeof d);
-      if (nread > 0)
+      eu_static_assert (sizeof d.a64 == sizeof d.a32);
+      nread = pread_retry (fd, d.a64, sizeof d.a64, offset);
+      if (nread < 0)
 	{
-	  switch (sizeof (long int))
-	    {
-	    case 4:
-	      for (size_t i = 0; (char *) &d.a32[i] < &d.buffer[nread]; ++i)
-		if (d.a32[i].a_type == AT_SYSINFO_EHDR)
-		  {
-		    *sysinfo_ehdr = d.a32[i].a_un.a_val;
-		    if (dwfl->segment_align > 1)
-		      {
-			nread = 0;
-			break;
-		      }
-		  }
-		else if (d.a32[i].a_type == AT_PAGESZ
-			 && dwfl->segment_align <= 1)
-		  dwfl->segment_align = d.a32[i].a_un.a_val;
+	  int ret = errno;
+	  close (fd);
+	  return ret;
+	}
+      for (size_t a32i = 0; a32i < nread / sizeof d.a32[0]; a32i++)
+	{
+	  const Elf32_auxv_t *a32 = d.a32 + a32i;
+	  switch (a32->a_type)
+	  {
+	    case AT_SYSINFO_EHDR:
+	      sysinfo_ehdr32 = a32->a_un.a_val;
 	      break;
-	    case 8:
-	      for (size_t i = 0; (char *) &d.a64[i] < &d.buffer[nread]; ++i)
-		if (d.a64[i].a_type == AT_SYSINFO_EHDR)
-		  {
-		    *sysinfo_ehdr = d.a64[i].a_un.a_val;
-		    if (dwfl->segment_align > 1)
-		      {
-			nread = 0;
-			break;
-		      }
-		  }
-		else if (d.a64[i].a_type == AT_PAGESZ
-			 && dwfl->segment_align <= 1)
-		  dwfl->segment_align = d.a64[i].a_un.a_val;
+	    case AT_PAGESZ:
+	      segment_align32 = a32->a_un.a_val;
 	      break;
-	    default:
-	      abort ();
+	  }
+	}
+      for (size_t a64i = 0; a64i < nread / sizeof d.a64[0]; a64i++)
+	{
+	  const Elf64_auxv_t *a64 = d.a64 + a64i;
+	  switch (a64->a_type)
+	  {
+	    case AT_SYSINFO_EHDR:
+	      sysinfo_ehdr64 = a64->a_un.a_val;
 	      break;
-	    }
+	    case AT_PAGESZ:
+	      segment_align64 = a64->a_un.a_val;
+	      break;
+	  }
 	}
+      offset += nread;
     }
-  while (nread > 0);
+  while (nread == sizeof d.a64);
 
   close (fd);
 
-  return nread < 0 ? errno : 0;
+  bool valid64 = sysinfo_ehdr64 != 0 || segment_align64 != dwfl->segment_align;
+  bool valid32 = sysinfo_ehdr32 != 0 || segment_align32 != dwfl->segment_align;
+
+  unsigned char pid_class = ELFCLASSNONE;
+  if (valid64 && valid32)
+    pid_class = get_pid_class (pid);
+
+  if (pid_class == ELFCLASS64 || (valid64 && ! valid32))
+    {
+      *sysinfo_ehdr = sysinfo_ehdr64;
+      dwfl->segment_align = segment_align64;
+      return 0;
+    }
+  if (pid_class == ELFCLASS32 || (! valid64 && valid32))
+    {
+      *sysinfo_ehdr = sysinfo_ehdr32;
+      dwfl->segment_align = segment_align32;
+      return 0;
+    }
+  return ENOEXEC;
 }
 
 static int
@@ -189,7 +226,6 @@ proc_maps_report (Dwfl *dwfl, FILE *f, GElf_Addr sysinfo_ehdr, pid_t pid)
 	    {
 	    bad_report:
 	      free (line);
-	      fclose (f);
 	      return -1;
 	    }
 
@@ -201,7 +237,7 @@ proc_maps_report (Dwfl *dwfl, FILE *f, GElf_Addr sysinfo_ehdr, pid_t pid)
 	}
 
       char *file = line + nread + strspn (line + nread, " \t");
-      if (file[0] == '\0' || (ino == 0 && dmajor == 0 && dminor == 0))
+      if (file[0] != '/' || (ino == 0 && dmajor == 0 && dminor == 0))
 	/* This line doesn't indicate a file mapping.  */
 	continue;
 
@@ -209,7 +245,8 @@ proc_maps_report (Dwfl *dwfl, FILE *f, GElf_Addr sysinfo_ehdr, pid_t pid)
 	  && ino == last_ino && dmajor == last_dmajor && dminor == last_dminor)
 	{
 	  /* This is another portion of the same file's mapping.  */
-	  assert (!strcmp (last_file, file));
+	  if (strcmp (last_file, file) != 0)
+	    goto bad_report;
 	  high = end;
 	}
       else
@@ -288,6 +325,7 @@ read_proc_memory (void *arg, void *data, GElf_Addr address,
 }
 
 extern Elf *elf_from_remote_memory (GElf_Addr ehdr_vma,
+				    GElf_Xword pagesize,
 				    GElf_Addr *loadbasep,
 				    ssize_t (*read_memory) (void *arg,
 							    void *data,
@@ -305,44 +343,80 @@ dwfl_linux_proc_find_elf (Dwfl_Module *mod __attribute__ ((unused)),
 			  const char *module_name, Dwarf_Addr base,
 			  char **file_name, Elf **elfp)
 {
+  int pid = -1;
   if (module_name[0] == '/')
     {
-      int fd = open64 (module_name, O_RDONLY);
-      if (fd >= 0)
+      /* When this callback is used together with dwfl_linux_proc_report
+	 then we might see mappings of special character devices.  Make
+	 sure we only open and return regular files.  Special devices
+	 might hang on open or read.  (deleted) files are super special.
+	 The image might come from memory if we are attached.  */
+      struct stat sb;
+      if (stat (module_name, &sb) == -1 || (sb.st_mode & S_IFMT) != S_IFREG)
+	{
+	  if (strcmp (strrchr (module_name, ' ') ?: "", " (deleted)") == 0)
+	    pid = INTUSE(dwfl_pid) (mod->dwfl);
+	  else
+	    return -1;
+	}
+
+      if (pid == -1)
 	{
-	  *file_name = strdup (module_name);
-	  if (*file_name == NULL)
+	  int fd = open64 (module_name, O_RDONLY);
+	  if (fd >= 0)
 	    {
-	      close (fd);
-	      return ENOMEM;
+	      *file_name = strdup (module_name);
+	      if (*file_name == NULL)
+		{
+		  close (fd);
+		  return ENOMEM;
+		}
 	    }
+	  return fd;
 	}
-      return fd;
     }
 
-  int pid;
-  if (sscanf (module_name, "[vdso: %d]", &pid) == 1)
+  if (pid != -1 || sscanf (module_name, "[vdso: %d]", &pid) == 1)
     {
       /* Special case for in-memory ELF image.  */
 
+      bool detach = false;
+      bool tid_was_stopped = false;
+      struct __libdwfl_pid_arg *pid_arg = __libdwfl_get_pid_arg (mod->dwfl);
+      if (pid_arg != NULL && ! pid_arg->assume_ptrace_stopped)
+	{
+	  /* If any thread is already attached we are fine.  Read
+	     through that thread.  It doesn't have to be the main
+	     thread pid.  */
+	  pid_t tid = pid_arg->tid_attached;
+	  if (tid != 0)
+	    pid = tid;
+	  else
+	    detach = __libdwfl_ptrace_attach (pid, &tid_was_stopped);
+	}
+
       char *fname;
       if (asprintf (&fname, PROCMEMFMT, pid) < 0)
-	return -1;
+	goto detach;
 
       int fd = open64 (fname, O_RDONLY);
       free (fname);
       if (fd < 0)
-	return -1;
+	goto detach;
 
-      *elfp = elf_from_remote_memory (base, NULL, &read_proc_memory, &fd);
+      *elfp = elf_from_remote_memory (base, getpagesize (), NULL,
+				      &read_proc_memory, &fd);
 
       close (fd);
 
       *file_name = NULL;
+
+    detach:
+      if (detach)
+	__libdwfl_ptrace_detach (pid, tid_was_stopped);
       return -1;
     }
 
-  abort ();
   return -1;
 }
 INTDEF (dwfl_linux_proc_find_elf)
diff --git a/src/libdwfl/offline.c b/src/libdwfl/offline.c
index 34aa9f84..982ceab0 100644
--- a/src/libdwfl/offline.c
+++ b/src/libdwfl/offline.c
@@ -1,51 +1,30 @@
 /* Recover relocatibility for addresses computed from debug information.
-   Copyright (C) 2005, 2006, 2007, 2008, 2009 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2009, 2012 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 #include <fcntl.h>
@@ -69,6 +48,7 @@ dwfl_offline_section_address (Dwfl_Module *mod,
   assert (mod->e_type == ET_REL);
   assert (shdr->sh_addr == 0);
   assert (shdr->sh_flags & SHF_ALLOC);
+  assert (shndx != 0);
 
   if (mod->debug.elf == NULL)
     /* We are only here because sh_addr is zero even though layout is complete.
@@ -148,7 +128,8 @@ process_elf (Dwfl *dwfl, const char *name, const char *file_name, int fd,
 	     Elf *elf)
 {
   Dwfl_Module *mod = __libdwfl_report_elf (dwfl, name, file_name, fd, elf,
-					   dwfl->offline_next_address, false);
+					   dwfl->offline_next_address, true,
+					   false);
   if (mod != NULL)
     {
       /* If this is an ET_EXEC file with fixed addresses, the address range
@@ -190,7 +171,8 @@ process_archive_member (Dwfl *dwfl, const char *name, const char *file_name,
       return ELF_C_NULL;
     }
 
-  if (!strcmp (h->ar_name, "/") || !strcmp (h->ar_name, "//"))
+  if (!strcmp (h->ar_name, "/") || !strcmp (h->ar_name, "//")
+      || !strcmp (h->ar_name, "/SYM64/"))
     {
     skip:;
       /* Skip this and go to the next.  */
diff --git a/src/libdwfl/open.c b/src/libdwfl/open.c
index 397af358..40aac388 100644
--- a/src/libdwfl/open.c
+++ b/src/libdwfl/open.c
@@ -1,51 +1,30 @@
 /* Decompression support for libdwfl: zlib (gzip) and/or bzlib (bzip2).
    Copyright (C) 2009 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "../libelf/libelfP.h"
 #undef	_
@@ -54,15 +33,15 @@
 #include <unistd.h>
 
 #if !USE_ZLIB
-# define __libdw_gunzip(...)	false
+# define __libdw_gunzip(...)	DWFL_E_BADELF
 #endif
 
 #if !USE_BZLIB
-# define __libdw_bunzip2(...)	false
+# define __libdw_bunzip2(...)	DWFL_E_BADELF
 #endif
 
 #if !USE_LZMA
-# define __libdw_unlzma(...)	false
+# define __libdw_unlzma(...)	DWFL_E_BADELF
 #endif
 
 /* Consumes and replaces *ELF only on success.  */
diff --git a/src/libdwfl/relocate.c b/src/libdwfl/relocate.c
index 95206f47..e102e1e4 100644
--- a/src/libdwfl/relocate.c
+++ b/src/libdwfl/relocate.c
@@ -1,51 +1,30 @@
 /* Relocate debug information.
-   Copyright (C) 2005-2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2005-2011, 2014 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
@@ -59,7 +38,11 @@ internal_function
 __libdwfl_relocate_value (Dwfl_Module *mod, Elf *elf, size_t *shstrndx,
 			  Elf32_Word shndx, GElf_Addr *value)
 {
-  assert (mod->e_type == ET_REL);
+  /* No adjustment needed for section zero, it is never loaded.
+     Handle it first, just in case the ELF file has strange section
+     zero flags set.  */
+  if (shndx == 0)
+    return DWFL_E_NOERROR;
 
   Elf_Scn *refscn = elf_getscn (elf, shndx);
   GElf_Shdr refshdr_mem, *refshdr = gelf_getshdr (refscn, &refshdr_mem);
@@ -223,7 +206,8 @@ resolve_symbol (Dwfl_Module *referer, struct reloc_symtab_cache *symtab,
 	  symtab->symstrdata = elf_getdata (elf_getscn (symtab->symelf,
 							symtab->strtabndx),
 					    NULL);
-	  if (unlikely (symtab->symstrdata == NULL))
+	  if (unlikely (symtab->symstrdata == NULL
+			|| symtab->symstrdata->d_buf == NULL))
 	    return DWFL_E_LIBELF;
 	}
       if (unlikely (sym->st_name >= symtab->symstrdata->d_size))
@@ -275,7 +259,8 @@ resolve_symbol (Dwfl_Module *referer, struct reloc_symtab_cache *symtab,
 
 		if (m->e_type != ET_REL)
 		  {
-		    sym->st_value = dwfl_adjusted_st_value (m, sym->st_value);
+		    sym->st_value = dwfl_adjusted_st_value (m, m->symfile->elf,
+							    sym->st_value);
 		    return DWFL_E_NOERROR;
 		  }
 
@@ -319,6 +304,46 @@ relocate_section (Dwfl_Module *mod, Elf *relocated, const GElf_Ehdr *ehdr,
   if (tdata == NULL)
     return DWFL_E_LIBELF;
 
+  /* If either the section that needs the relocation applied, or the
+     section that the relocations come from overlap one of the ehdrs,
+     shdrs or phdrs data then we refuse to do the relocations.  It
+     isn't illegal for ELF section data to overlap the header data,
+     but updating the (relocation) data might corrupt the in-memory
+     libelf headers causing strange corruptions or errors.  */
+  size_t ehsize = gelf_fsize (relocated, ELF_T_EHDR, 1, EV_CURRENT);
+  if (unlikely (shdr->sh_offset < ehsize
+		|| tshdr->sh_offset < ehsize))
+    return DWFL_E_BADELF;
+
+  GElf_Off shdrs_start = ehdr->e_shoff;
+  size_t shnums;
+  if (elf_getshdrnum (relocated, &shnums) < 0)
+    return DWFL_E_LIBELF;
+  /* Overflows will have been checked by elf_getshdrnum/get|rawdata.  */
+  size_t shentsize = gelf_fsize (relocated, ELF_T_SHDR, 1, EV_CURRENT);
+  GElf_Off shdrs_end = shdrs_start + shnums * shentsize;
+  if (unlikely ((shdrs_start < shdr->sh_offset + shdr->sh_size
+		 && shdr->sh_offset < shdrs_end)
+		|| (shdrs_start < tshdr->sh_offset + tshdr->sh_size
+		    && tshdr->sh_offset < shdrs_end)))
+    return DWFL_E_BADELF;
+
+  GElf_Off phdrs_start = ehdr->e_phoff;
+  size_t phnums;
+  if (elf_getphdrnum (relocated, &phnums) < 0)
+    return DWFL_E_LIBELF;
+  if (phdrs_start != 0 && phnums != 0)
+    {
+      /* Overflows will have been checked by elf_getphdrnum/get|rawdata.  */
+      size_t phentsize = gelf_fsize (relocated, ELF_T_PHDR, 1, EV_CURRENT);
+      GElf_Off phdrs_end = phdrs_start + phnums * phentsize;
+      if (unlikely ((phdrs_start < shdr->sh_offset + shdr->sh_size
+		     && shdr->sh_offset < phdrs_end)
+		    || (phdrs_start < tshdr->sh_offset + tshdr->sh_size
+			&& tshdr->sh_offset < phdrs_end)))
+	return DWFL_E_BADELF;
+    }
+
   /* Apply one relocation.  Returns true for any invalid data.  */
   Dwfl_Error relocate (GElf_Addr offset, const GElf_Sxword *addend,
 		       int rtype, int symndx)
@@ -387,7 +412,7 @@ relocate_section (Dwfl_Module *mod, Elf *relocated, const GElf_Ehdr *ehdr,
 	return DWFL_E_BADRELTYPE;
       }
 
-    if (offset + size > tdata->d_size)
+    if (offset > tdata->d_size || tdata->d_size - offset < size)
       return DWFL_E_BADRELOFF;
 
 #define DO_TYPE(NAME, Name) GElf_##Name Name;
@@ -478,7 +503,10 @@ relocate_section (Dwfl_Module *mod, Elf *relocated, const GElf_Ehdr *ehdr,
       }
   }
 
-  size_t nrels = shdr->sh_size / shdr->sh_entsize;
+  size_t sh_entsize
+    = gelf_fsize (relocated, shdr->sh_type == SHT_REL ? ELF_T_REL : ELF_T_RELA,
+		  1, EV_CURRENT);
+  size_t nrels = shdr->sh_size / sh_entsize;
   size_t complete = 0;
   if (shdr->sh_type == SHT_REL)
     for (size_t relidx = 0; !result && relidx < nrels; ++relidx)
@@ -580,7 +608,7 @@ relocate_section (Dwfl_Module *mod, Elf *relocated, const GElf_Ehdr *ehdr,
 	  nrels = next;
 	}
 
-      shdr->sh_size = reldata->d_size = nrels * shdr->sh_entsize;
+      shdr->sh_size = reldata->d_size = nrels * sh_entsize;
       gelf_update_shdr (scn, shdr);
     }
 
diff --git a/src/libdwfl/segment.c b/src/libdwfl/segment.c
index 9d78c87f..92769174 100644
--- a/src/libdwfl/segment.c
+++ b/src/libdwfl/segment.c
@@ -1,64 +1,45 @@
 /* Manage address space lookup table for libdwfl.
-   Copyright (C) 2008, 2009, 2010 Red Hat, Inc.
-   This file is part of Red Hat elfutils.
+   Copyright (C) 2008, 2009, 2010, 2013 Red Hat, Inc.
+   This file is part of elfutils.
 
-   Red Hat elfutils is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by the
-   Free Software Foundation; version 2 of the License.
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
 
-   Red Hat elfutils is distributed in the hope that it will be useful, but
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
-   You should have received a copy of the GNU General Public License along
-   with Red Hat elfutils; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
-
-   In addition, as a special exception, Red Hat, Inc. gives You the
-   additional right to link the code of Red Hat elfutils with code licensed
-   under any Open Source Initiative certified open source license
-   (http://www.opensource.org/licenses/index.php) which requires the
-   distribution of source code with any binary distribution and to
-   distribute linked combinations of the two.  Non-GPL Code permitted under
-   this exception must only link to the code of Red Hat elfutils through
-   those well defined interfaces identified in the file named EXCEPTION
-   found in the source code files (the "Approved Interfaces").  The files
-   of Non-GPL Code may instantiate templates or use macros or inline
-   functions from the Approved Interfaces without causing the resulting
-   work to be covered by the GNU General Public License.  Only Red Hat,
-   Inc. may make changes or additions to the list of Approved Interfaces.
-   Red Hat's grant of this exception is conditioned upon your not adding
-   any new exceptions.  If you wish to add a new Approved Interface or
-   exception, please contact Red Hat.  You must obey the GNU General Public
-   License in all respects for all of the Red Hat elfutils code and other
-   code used in conjunction with Red Hat elfutils except the Non-GPL Code
-   covered by this exception.  If you modify this file, you may extend this
-   exception to your version of the file, but you are not obligated to do
-   so.  If you do not wish to provide this exception without modification,
-   you must delete this exception statement from your version and license
-   this file solely under the GPL without exception.
-
-   Red Hat elfutils is an included package of the Open Invention Network.
-   An included package of the Open Invention Network is a package for which
-   Open Invention Network licensees cross-license their patents.  No patent
-   license is granted, either expressly or impliedly, by designation as an
-   included package.  Should you wish to participate in the Open Invention
-   Network licensing program, please visit www.openinventionnetwork.com
-   <http://www.openinventionnetwork.com>.  */
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
 
 #include "libdwflP.h"
 
-static GElf_Addr
-segment_start (Dwfl *dwfl, GElf_Addr start)
+GElf_Addr
+internal_function
+__libdwfl_segment_start (Dwfl *dwfl, GElf_Addr start)
 {
   if (dwfl->segment_align > 1)
     start &= -dwfl->segment_align;
   return start;
 }
 
-static GElf_Addr
-segment_end (Dwfl *dwfl, GElf_Addr end)
+GElf_Addr
+internal_function
+__libdwfl_segment_end (Dwfl *dwfl, GElf_Addr end)
 {
   if (dwfl->segment_align > 1)
     end = (end + dwfl->segment_align - 1) & -dwfl->segment_align;
@@ -177,8 +158,8 @@ reify_segments (Dwfl *dwfl)
   for (Dwfl_Module *mod = dwfl->modulelist; mod != NULL; mod = mod->next)
     if (! mod->gc)
       {
-	const GElf_Addr start = segment_start (dwfl, mod->low_addr);
-	const GElf_Addr end = segment_end (dwfl, mod->high_addr);
+	const GElf_Addr start = __libdwfl_segment_start (dwfl, mod->low_addr);
+	const GElf_Addr end = __libdwfl_segment_end (dwfl, mod->high_addr);
 	bool resized = false;
 
 	int idx = lookup (dwfl, start, hint);
@@ -317,8 +298,9 @@ dwfl_report_segment (Dwfl *dwfl, int ndx, const GElf_Phdr *phdr, GElf_Addr bias,
       dwfl->lookup_module = NULL;
     }
 
-  GElf_Addr start = segment_start (dwfl, bias + phdr->p_vaddr);
-  GElf_Addr end = segment_end (dwfl, bias + phdr->p_vaddr + phdr->p_memsz);
+  GElf_Addr start = __libdwfl_segment_start (dwfl, bias + phdr->p_vaddr);
+  GElf_Addr end = __libdwfl_segment_end (dwfl,
+					 bias + phdr->p_vaddr + phdr->p_memsz);
 
   /* Coalesce into the last one if contiguous and matching.  */
   if (ndx != dwfl->lookup_tail_ndx