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-rw-r--r--binutils-2.24/bfd/elfcode.h1870
1 files changed, 0 insertions, 1870 deletions
diff --git a/binutils-2.24/bfd/elfcode.h b/binutils-2.24/bfd/elfcode.h
deleted file mode 100644
index e296c5ce..00000000
--- a/binutils-2.24/bfd/elfcode.h
+++ /dev/null
@@ -1,1870 +0,0 @@
-/* ELF executable support for BFD.
- Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
- Free Software Foundation, Inc.
-
- Written by Fred Fish @ Cygnus Support, from information published
- in "UNIX System V Release 4, Programmers Guide: ANSI C and
- Programming Support Tools". Sufficient support for gdb.
-
- Rewritten by Mark Eichin @ Cygnus Support, from information
- published in "System V Application Binary Interface", chapters 4
- and 5, as well as the various "Processor Supplement" documents
- derived from it. Added support for assembler and other object file
- utilities. Further work done by Ken Raeburn (Cygnus Support), Michael
- Meissner (Open Software Foundation), and Peter Hoogenboom (University
- of Utah) to finish and extend this.
-
- This file is part of BFD, the Binary File Descriptor library.
-
- This program 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; either version 3 of the License, or
- (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
-
-
-/* Problems and other issues to resolve.
-
- (1) BFD expects there to be some fixed number of "sections" in
- the object file. I.E. there is a "section_count" variable in the
- bfd structure which contains the number of sections. However, ELF
- supports multiple "views" of a file. In particular, with current
- implementations, executable files typically have two tables, a
- program header table and a section header table, both of which
- partition the executable.
-
- In ELF-speak, the "linking view" of the file uses the section header
- table to access "sections" within the file, and the "execution view"
- uses the program header table to access "segments" within the file.
- "Segments" typically may contain all the data from one or more
- "sections".
-
- Note that the section header table is optional in ELF executables,
- but it is this information that is most useful to gdb. If the
- section header table is missing, then gdb should probably try
- to make do with the program header table. (FIXME)
-
- (2) The code in this file is compiled twice, once in 32-bit mode and
- once in 64-bit mode. More of it should be made size-independent
- and moved into elf.c.
-
- (3) ELF section symbols are handled rather sloppily now. This should
- be cleaned up, and ELF section symbols reconciled with BFD section
- symbols.
-
- (4) We need a published spec for 64-bit ELF. We've got some stuff here
- that we're using for SPARC V9 64-bit chips, but don't assume that
- it's cast in stone.
- */
-
-#include "sysdep.h"
-#include "bfd.h"
-#include "libiberty.h"
-#include "bfdlink.h"
-#include "libbfd.h"
-#include "elf-bfd.h"
-
-/* Renaming structures, typedefs, macros and functions to be size-specific. */
-#define Elf_External_Ehdr NAME(Elf,External_Ehdr)
-#define Elf_External_Sym NAME(Elf,External_Sym)
-#define Elf_External_Shdr NAME(Elf,External_Shdr)
-#define Elf_External_Phdr NAME(Elf,External_Phdr)
-#define Elf_External_Rel NAME(Elf,External_Rel)
-#define Elf_External_Rela NAME(Elf,External_Rela)
-#define Elf_External_Dyn NAME(Elf,External_Dyn)
-
-#define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command)
-#define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal)
-#define elf_core_file_matches_executable_p \
- NAME(bfd_elf,core_file_matches_executable_p)
-#define elf_core_file_pid NAME(bfd_elf,core_file_pid)
-#define elf_object_p NAME(bfd_elf,object_p)
-#define elf_core_file_p NAME(bfd_elf,core_file_p)
-#define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound)
-#define elf_get_dynamic_symtab_upper_bound \
- NAME(bfd_elf,get_dynamic_symtab_upper_bound)
-#define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in)
-#define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in)
-#define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out)
-#define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out)
-#define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in)
-#define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out)
-#define elf_swap_phdr_in NAME(bfd_elf,swap_phdr_in)
-#define elf_swap_phdr_out NAME(bfd_elf,swap_phdr_out)
-#define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in)
-#define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out)
-#define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound)
-#define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc)
-#define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table)
-#define elf_canonicalize_symtab NAME(bfd_elf,canonicalize_symtab)
-#define elf_canonicalize_dynamic_symtab \
- NAME(bfd_elf,canonicalize_dynamic_symtab)
-#define elf_get_synthetic_symtab \
- NAME(bfd_elf,get_synthetic_symtab)
-#define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol)
-#define elf_get_symbol_info NAME(bfd_elf,get_symbol_info)
-#define elf_get_lineno NAME(bfd_elf,get_lineno)
-#define elf_set_arch_mach NAME(bfd_elf,set_arch_mach)
-#define elf_find_nearest_line NAME(bfd_elf,find_nearest_line)
-#define elf_sizeof_headers NAME(bfd_elf,sizeof_headers)
-#define elf_set_section_contents NAME(bfd_elf,set_section_contents)
-#define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto)
-#define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel)
-#define elf_find_section NAME(bfd_elf,find_section)
-#define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr)
-#define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs)
-#define elf_checksum_contents NAME(bfd_elf,checksum_contents)
-#define elf_write_relocs NAME(bfd_elf,write_relocs)
-#define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table)
-
-#if ARCH_SIZE == 64
-#define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y)
-#define ELF_R_SYM(X) ELF64_R_SYM(X)
-#define ELF_R_TYPE(X) ELF64_R_TYPE(X)
-#define ELFCLASS ELFCLASS64
-#define FILE_ALIGN 8
-#define LOG_FILE_ALIGN 3
-#endif
-#if ARCH_SIZE == 32
-#define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y)
-#define ELF_R_SYM(X) ELF32_R_SYM(X)
-#define ELF_R_TYPE(X) ELF32_R_TYPE(X)
-#define ELFCLASS ELFCLASS32
-#define FILE_ALIGN 4
-#define LOG_FILE_ALIGN 2
-#endif
-
-#if DEBUG & 2
-static void elf_debug_section (int, Elf_Internal_Shdr *);
-#endif
-#if DEBUG & 1
-static void elf_debug_file (Elf_Internal_Ehdr *);
-#endif
-
-/* Structure swapping routines */
-
-/* Should perhaps use put_offset, put_word, etc. For now, the two versions
- can be handled by explicitly specifying 32 bits or "the long type". */
-#if ARCH_SIZE == 64
-#define H_PUT_WORD H_PUT_64
-#define H_PUT_SIGNED_WORD H_PUT_S64
-#define H_GET_WORD H_GET_64
-#define H_GET_SIGNED_WORD H_GET_S64
-#endif
-#if ARCH_SIZE == 32
-#define H_PUT_WORD H_PUT_32
-#define H_PUT_SIGNED_WORD H_PUT_S32
-#define H_GET_WORD H_GET_32
-#define H_GET_SIGNED_WORD H_GET_S32
-#endif
-
-/* Translate an ELF symbol in external format into an ELF symbol in internal
- format. */
-
-bfd_boolean
-elf_swap_symbol_in (bfd *abfd,
- const void *psrc,
- const void *pshn,
- Elf_Internal_Sym *dst)
-{
- const Elf_External_Sym *src = (const Elf_External_Sym *) psrc;
- const Elf_External_Sym_Shndx *shndx = (const Elf_External_Sym_Shndx *) pshn;
- int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
-
- dst->st_name = H_GET_32 (abfd, src->st_name);
- if (signed_vma)
- dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value);
- else
- dst->st_value = H_GET_WORD (abfd, src->st_value);
- dst->st_size = H_GET_WORD (abfd, src->st_size);
- dst->st_info = H_GET_8 (abfd, src->st_info);
- dst->st_other = H_GET_8 (abfd, src->st_other);
- dst->st_shndx = H_GET_16 (abfd, src->st_shndx);
- if (dst->st_shndx == (SHN_XINDEX & 0xffff))
- {
- if (shndx == NULL)
- return FALSE;
- dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx);
- }
- else if (dst->st_shndx >= (SHN_LORESERVE & 0xffff))
- dst->st_shndx += SHN_LORESERVE - (SHN_LORESERVE & 0xffff);
- dst->st_target_internal = 0;
- return TRUE;
-}
-
-/* Translate an ELF symbol in internal format into an ELF symbol in external
- format. */
-
-void
-elf_swap_symbol_out (bfd *abfd,
- const Elf_Internal_Sym *src,
- void *cdst,
- void *shndx)
-{
- unsigned int tmp;
- Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
- H_PUT_32 (abfd, src->st_name, dst->st_name);
- H_PUT_WORD (abfd, src->st_value, dst->st_value);
- H_PUT_WORD (abfd, src->st_size, dst->st_size);
- H_PUT_8 (abfd, src->st_info, dst->st_info);
- H_PUT_8 (abfd, src->st_other, dst->st_other);
- tmp = src->st_shndx;
- if (tmp >= (SHN_LORESERVE & 0xffff) && tmp < SHN_LORESERVE)
- {
- if (shndx == NULL)
- abort ();
- H_PUT_32 (abfd, tmp, shndx);
- tmp = SHN_XINDEX & 0xffff;
- }
- H_PUT_16 (abfd, tmp, dst->st_shndx);
-}
-
-/* Translate an ELF file header in external format into an ELF file header in
- internal format. */
-
-static void
-elf_swap_ehdr_in (bfd *abfd,
- const Elf_External_Ehdr *src,
- Elf_Internal_Ehdr *dst)
-{
- int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
- memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
- dst->e_type = H_GET_16 (abfd, src->e_type);
- dst->e_machine = H_GET_16 (abfd, src->e_machine);
- dst->e_version = H_GET_32 (abfd, src->e_version);
- if (signed_vma)
- dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry);
- else
- dst->e_entry = H_GET_WORD (abfd, src->e_entry);
- dst->e_phoff = H_GET_WORD (abfd, src->e_phoff);
- dst->e_shoff = H_GET_WORD (abfd, src->e_shoff);
- dst->e_flags = H_GET_32 (abfd, src->e_flags);
- dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize);
- dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize);
- dst->e_phnum = H_GET_16 (abfd, src->e_phnum);
- dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize);
- dst->e_shnum = H_GET_16 (abfd, src->e_shnum);
- dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx);
-}
-
-/* Translate an ELF file header in internal format into an ELF file header in
- external format. */
-
-static void
-elf_swap_ehdr_out (bfd *abfd,
- const Elf_Internal_Ehdr *src,
- Elf_External_Ehdr *dst)
-{
- unsigned int tmp;
- int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
- memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
- /* note that all elements of dst are *arrays of unsigned char* already... */
- H_PUT_16 (abfd, src->e_type, dst->e_type);
- H_PUT_16 (abfd, src->e_machine, dst->e_machine);
- H_PUT_32 (abfd, src->e_version, dst->e_version);
- if (signed_vma)
- H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry);
- else
- H_PUT_WORD (abfd, src->e_entry, dst->e_entry);
- H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff);
- H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff);
- H_PUT_32 (abfd, src->e_flags, dst->e_flags);
- H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize);
- H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize);
- tmp = src->e_phnum;
- if (tmp > PN_XNUM)
- tmp = PN_XNUM;
- H_PUT_16 (abfd, tmp, dst->e_phnum);
- H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize);
- tmp = src->e_shnum;
- if (tmp >= (SHN_LORESERVE & 0xffff))
- tmp = SHN_UNDEF;
- H_PUT_16 (abfd, tmp, dst->e_shnum);
- tmp = src->e_shstrndx;
- if (tmp >= (SHN_LORESERVE & 0xffff))
- tmp = SHN_XINDEX & 0xffff;
- H_PUT_16 (abfd, tmp, dst->e_shstrndx);
-}
-
-/* Translate an ELF section header table entry in external format into an
- ELF section header table entry in internal format. */
-
-static void
-elf_swap_shdr_in (bfd *abfd,
- const Elf_External_Shdr *src,
- Elf_Internal_Shdr *dst)
-{
- int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
-
- dst->sh_name = H_GET_32 (abfd, src->sh_name);
- dst->sh_type = H_GET_32 (abfd, src->sh_type);
- dst->sh_flags = H_GET_WORD (abfd, src->sh_flags);
- if (signed_vma)
- dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr);
- else
- dst->sh_addr = H_GET_WORD (abfd, src->sh_addr);
- dst->sh_offset = H_GET_WORD (abfd, src->sh_offset);
- dst->sh_size = H_GET_WORD (abfd, src->sh_size);
- dst->sh_link = H_GET_32 (abfd, src->sh_link);
- dst->sh_info = H_GET_32 (abfd, src->sh_info);
- dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign);
- dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize);
- dst->bfd_section = NULL;
- dst->contents = NULL;
-}
-
-/* Translate an ELF section header table entry in internal format into an
- ELF section header table entry in external format. */
-
-static void
-elf_swap_shdr_out (bfd *abfd,
- const Elf_Internal_Shdr *src,
- Elf_External_Shdr *dst)
-{
- /* note that all elements of dst are *arrays of unsigned char* already... */
- H_PUT_32 (abfd, src->sh_name, dst->sh_name);
- H_PUT_32 (abfd, src->sh_type, dst->sh_type);
- H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags);
- H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr);
- H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset);
- H_PUT_WORD (abfd, src->sh_size, dst->sh_size);
- H_PUT_32 (abfd, src->sh_link, dst->sh_link);
- H_PUT_32 (abfd, src->sh_info, dst->sh_info);
- H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign);
- H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize);
-}
-
-/* Translate an ELF program header table entry in external format into an
- ELF program header table entry in internal format. */
-
-void
-elf_swap_phdr_in (bfd *abfd,
- const Elf_External_Phdr *src,
- Elf_Internal_Phdr *dst)
-{
- int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
-
- dst->p_type = H_GET_32 (abfd, src->p_type);
- dst->p_flags = H_GET_32 (abfd, src->p_flags);
- dst->p_offset = H_GET_WORD (abfd, src->p_offset);
- if (signed_vma)
- {
- dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr);
- dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr);
- }
- else
- {
- dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr);
- dst->p_paddr = H_GET_WORD (abfd, src->p_paddr);
- }
- dst->p_filesz = H_GET_WORD (abfd, src->p_filesz);
- dst->p_memsz = H_GET_WORD (abfd, src->p_memsz);
- dst->p_align = H_GET_WORD (abfd, src->p_align);
-}
-
-void
-elf_swap_phdr_out (bfd *abfd,
- const Elf_Internal_Phdr *src,
- Elf_External_Phdr *dst)
-{
- const struct elf_backend_data *bed;
- bfd_vma p_paddr;
-
- bed = get_elf_backend_data (abfd);
- p_paddr = bed->want_p_paddr_set_to_zero ? 0 : src->p_paddr;
-
- /* note that all elements of dst are *arrays of unsigned char* already... */
- H_PUT_32 (abfd, src->p_type, dst->p_type);
- H_PUT_WORD (abfd, src->p_offset, dst->p_offset);
- H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr);
- H_PUT_WORD (abfd, p_paddr, dst->p_paddr);
- H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz);
- H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz);
- H_PUT_32 (abfd, src->p_flags, dst->p_flags);
- H_PUT_WORD (abfd, src->p_align, dst->p_align);
-}
-
-/* Translate an ELF reloc from external format to internal format. */
-void
-elf_swap_reloc_in (bfd *abfd,
- const bfd_byte *s,
- Elf_Internal_Rela *dst)
-{
- const Elf_External_Rel *src = (const Elf_External_Rel *) s;
- dst->r_offset = H_GET_WORD (abfd, src->r_offset);
- dst->r_info = H_GET_WORD (abfd, src->r_info);
- dst->r_addend = 0;
-}
-
-void
-elf_swap_reloca_in (bfd *abfd,
- const bfd_byte *s,
- Elf_Internal_Rela *dst)
-{
- const Elf_External_Rela *src = (const Elf_External_Rela *) s;
- dst->r_offset = H_GET_WORD (abfd, src->r_offset);
- dst->r_info = H_GET_WORD (abfd, src->r_info);
- dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend);
-}
-
-/* Translate an ELF reloc from internal format to external format. */
-void
-elf_swap_reloc_out (bfd *abfd,
- const Elf_Internal_Rela *src,
- bfd_byte *d)
-{
- Elf_External_Rel *dst = (Elf_External_Rel *) d;
- H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
- H_PUT_WORD (abfd, src->r_info, dst->r_info);
-}
-
-void
-elf_swap_reloca_out (bfd *abfd,
- const Elf_Internal_Rela *src,
- bfd_byte *d)
-{
- Elf_External_Rela *dst = (Elf_External_Rela *) d;
- H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
- H_PUT_WORD (abfd, src->r_info, dst->r_info);
- H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend);
-}
-
-void
-elf_swap_dyn_in (bfd *abfd,
- const void *p,
- Elf_Internal_Dyn *dst)
-{
- const Elf_External_Dyn *src = (const Elf_External_Dyn *) p;
-
- dst->d_tag = H_GET_WORD (abfd, src->d_tag);
- dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val);
-}
-
-void
-elf_swap_dyn_out (bfd *abfd,
- const Elf_Internal_Dyn *src,
- void *p)
-{
- Elf_External_Dyn *dst = (Elf_External_Dyn *) p;
-
- H_PUT_WORD (abfd, src->d_tag, dst->d_tag);
- H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val);
-}
-
-/* ELF .o/exec file reading */
-
-/* Begin processing a given object.
-
- First we validate the file by reading in the ELF header and checking
- the magic number. */
-
-static inline bfd_boolean
-elf_file_p (Elf_External_Ehdr *x_ehdrp)
-{
- return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0)
- && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1)
- && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2)
- && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
-}
-
-/* Check to see if the file associated with ABFD matches the target vector
- that ABFD points to.
-
- Note that we may be called several times with the same ABFD, but different
- target vectors, most of which will not match. We have to avoid leaving
- any side effects in ABFD, or any data it points to (like tdata), if the
- file does not match the target vector. */
-
-const bfd_target *
-elf_object_p (bfd *abfd)
-{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_External_Shdr x_shdr; /* Section header table entry, external form */
- Elf_Internal_Shdr i_shdr;
- Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
- unsigned int shindex;
- const struct elf_backend_data *ebd;
- asection *s;
- bfd_size_type amt;
- const bfd_target *target;
-
- /* Read in the ELF header in external format. */
-
- if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr))
- {
- if (bfd_get_error () != bfd_error_system_call)
- goto got_wrong_format_error;
- else
- goto got_no_match;
- }
-
- /* Now check to see if we have a valid ELF file, and one that BFD can
- make use of. The magic number must match, the address size ('class')
- and byte-swapping must match our XVEC entry, and it must have a
- section header table (FIXME: See comments re sections at top of this
- file). */
-
- if (! elf_file_p (&x_ehdr)
- || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
- || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
- goto got_wrong_format_error;
-
- /* Check that file's byte order matches xvec's */
- switch (x_ehdr.e_ident[EI_DATA])
- {
- case ELFDATA2MSB: /* Big-endian */
- if (! bfd_header_big_endian (abfd))
- goto got_wrong_format_error;
- break;
- case ELFDATA2LSB: /* Little-endian */
- if (! bfd_header_little_endian (abfd))
- goto got_wrong_format_error;
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto got_wrong_format_error;
- }
-
- target = abfd->xvec;
-
- /* Allocate an instance of the elf_obj_tdata structure and hook it up to
- the tdata pointer in the bfd. */
-
- if (! (*target->_bfd_set_format[bfd_object]) (abfd))
- goto got_no_match;
-
- /* Now that we know the byte order, swap in the rest of the header */
- i_ehdrp = elf_elfheader (abfd);
- elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
-#if DEBUG & 1
- elf_debug_file (i_ehdrp);
-#endif
-
- /* Reject ET_CORE (header indicates core file, not object file) */
- if (i_ehdrp->e_type == ET_CORE)
- goto got_wrong_format_error;
-
- /* If this is a relocatable file and there is no section header
- table, then we're hosed. */
- if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL)
- goto got_wrong_format_error;
-
- /* As a simple sanity check, verify that what BFD thinks is the
- size of each section header table entry actually matches the size
- recorded in the file, but only if there are any sections. */
- if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0)
- goto got_wrong_format_error;
-
- /* Further sanity check. */
- if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0)
- goto got_wrong_format_error;
-
- ebd = get_elf_backend_data (abfd);
- if (ebd->s->arch_size != ARCH_SIZE)
- goto got_wrong_format_error;
-
- /* Check that the ELF e_machine field matches what this particular
- BFD format expects. */
- if (ebd->elf_machine_code != i_ehdrp->e_machine
- && (ebd->elf_machine_alt1 == 0
- || i_ehdrp->e_machine != ebd->elf_machine_alt1)
- && (ebd->elf_machine_alt2 == 0
- || i_ehdrp->e_machine != ebd->elf_machine_alt2)
- && ebd->elf_machine_code != EM_NONE)
- goto got_wrong_format_error;
-
- if (i_ehdrp->e_type == ET_EXEC)
- abfd->flags |= EXEC_P;
- else if (i_ehdrp->e_type == ET_DYN)
- abfd->flags |= DYNAMIC;
-
- if (i_ehdrp->e_phnum > 0)
- abfd->flags |= D_PAGED;
-
- if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
- {
- /* It's OK if this fails for the generic target. */
- if (ebd->elf_machine_code != EM_NONE)
- goto got_no_match;
- }
-
- if (ebd->elf_machine_code != EM_NONE
- && i_ehdrp->e_ident[EI_OSABI] != ebd->elf_osabi
- && ebd->elf_osabi != ELFOSABI_NONE)
- goto got_wrong_format_error;
-
- if (i_ehdrp->e_shoff != 0)
- {
- bfd_signed_vma where = i_ehdrp->e_shoff;
-
- if (where != (file_ptr) where)
- goto got_wrong_format_error;
-
- /* Seek to the section header table in the file. */
- if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
- goto got_no_match;
-
- /* Read the first section header at index 0, and convert to internal
- form. */
- if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
- goto got_no_match;
- elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
-
- /* If the section count is zero, the actual count is in the first
- section header. */
- if (i_ehdrp->e_shnum == SHN_UNDEF)
- {
- i_ehdrp->e_shnum = i_shdr.sh_size;
- if (i_ehdrp->e_shnum >= SHN_LORESERVE
- || i_ehdrp->e_shnum != i_shdr.sh_size
- || i_ehdrp->e_shnum == 0)
- goto got_wrong_format_error;
- }
-
- /* And similarly for the string table index. */
- if (i_ehdrp->e_shstrndx == (SHN_XINDEX & 0xffff))
- {
- i_ehdrp->e_shstrndx = i_shdr.sh_link;
- if (i_ehdrp->e_shstrndx != i_shdr.sh_link)
- goto got_wrong_format_error;
- }
-
- /* And program headers. */
- if (i_ehdrp->e_phnum == PN_XNUM && i_shdr.sh_info != 0)
- {
- i_ehdrp->e_phnum = i_shdr.sh_info;
- if (i_ehdrp->e_phnum != i_shdr.sh_info)
- goto got_wrong_format_error;
- }
-
- /* Sanity check that we can read all of the section headers.
- It ought to be good enough to just read the last one. */
- if (i_ehdrp->e_shnum != 1)
- {
- /* Check that we don't have a totally silly number of sections. */
- if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr)
- || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr))
- goto got_wrong_format_error;
-
- where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr);
- if (where != (file_ptr) where)
- goto got_wrong_format_error;
- if ((bfd_size_type) where <= i_ehdrp->e_shoff)
- goto got_wrong_format_error;
-
- if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
- goto got_no_match;
- if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
- goto got_no_match;
-
- /* Back to where we were. */
- where = i_ehdrp->e_shoff + sizeof (x_shdr);
- if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
- goto got_no_match;
- }
- }
-
- /* Allocate space for a copy of the section header table in
- internal form. */
- if (i_ehdrp->e_shnum != 0)
- {
- Elf_Internal_Shdr *shdrp;
- unsigned int num_sec;
-
- amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum;
- i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
- if (!i_shdrp)
- goto got_no_match;
- num_sec = i_ehdrp->e_shnum;
- elf_numsections (abfd) = num_sec;
- amt = sizeof (i_shdrp) * num_sec;
- elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
- if (!elf_elfsections (abfd))
- goto got_no_match;
-
- memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp));
- for (shdrp = i_shdrp, shindex = 0; shindex < num_sec; shindex++)
- elf_elfsections (abfd)[shindex] = shdrp++;
-
- /* Read in the rest of the section header table and convert it
- to internal form. */
- for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
- {
- if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
- goto got_no_match;
- elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
-
- /* Sanity check sh_link and sh_info. */
- if (i_shdrp[shindex].sh_link >= num_sec)
- {
- /* PR 10478: Accept Solaris binaries with a sh_link
- field set to SHN_BEFORE or SHN_AFTER. */
- switch (ebd->elf_machine_code)
- {
- case EM_386:
- case EM_486:
- case EM_X86_64:
- case EM_OLD_SPARCV9:
- case EM_SPARC32PLUS:
- case EM_SPARCV9:
- case EM_SPARC:
- if (i_shdrp[shindex].sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
- || i_shdrp[shindex].sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
- break;
- /* Otherwise fall through. */
- default:
- goto got_wrong_format_error;
- }
- }
-
- if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK)
- || i_shdrp[shindex].sh_type == SHT_RELA
- || i_shdrp[shindex].sh_type == SHT_REL)
- && i_shdrp[shindex].sh_info >= num_sec)
- goto got_wrong_format_error;
-
- /* If the section is loaded, but not page aligned, clear
- D_PAGED. */
- if (i_shdrp[shindex].sh_size != 0
- && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0
- && i_shdrp[shindex].sh_type != SHT_NOBITS
- && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset)
- % ebd->minpagesize)
- != 0))
- abfd->flags &= ~D_PAGED;
- }
- }
-
- /* A further sanity check. */
- if (i_ehdrp->e_shnum != 0)
- {
- if (i_ehdrp->e_shstrndx >= elf_numsections (abfd))
- {
- /* PR 2257:
- We used to just goto got_wrong_format_error here
- but there are binaries in existance for which this test
- will prevent the binutils from working with them at all.
- So we are kind, and reset the string index value to 0
- so that at least some processing can be done. */
- i_ehdrp->e_shstrndx = SHN_UNDEF;
- _bfd_error_handler (_("warning: %s has a corrupt string table index - ignoring"), abfd->filename);
- }
- }
- else if (i_ehdrp->e_shstrndx != SHN_UNDEF)
- goto got_wrong_format_error;
-
- /* Read in the program headers. */
- if (i_ehdrp->e_phnum == 0)
- elf_tdata (abfd)->phdr = NULL;
- else
- {
- Elf_Internal_Phdr *i_phdr;
- unsigned int i;
-
- amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr);
- elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
- if (elf_tdata (abfd)->phdr == NULL)
- goto got_no_match;
- if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
- goto got_no_match;
- i_phdr = elf_tdata (abfd)->phdr;
- for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++)
- {
- Elf_External_Phdr x_phdr;
-
- if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr)
- goto got_no_match;
- elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
- }
- }
-
- if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0)
- {
- unsigned int num_sec;
-
- /* Once all of the section headers have been read and converted, we
- can start processing them. Note that the first section header is
- a dummy placeholder entry, so we ignore it. */
- num_sec = elf_numsections (abfd);
- for (shindex = 1; shindex < num_sec; shindex++)
- if (!bfd_section_from_shdr (abfd, shindex))
- goto got_no_match;
-
- /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */
- if (! _bfd_elf_setup_sections (abfd))
- goto got_wrong_format_error;
- }
-
- /* Let the backend double check the format and override global
- information. */
- if (ebd->elf_backend_object_p)
- {
- if (! (*ebd->elf_backend_object_p) (abfd))
- goto got_wrong_format_error;
- }
-
- /* Remember the entry point specified in the ELF file header. */
- bfd_set_start_address (abfd, i_ehdrp->e_entry);
-
- /* If we have created any reloc sections that are associated with
- debugging sections, mark the reloc sections as debugging as well. */
- for (s = abfd->sections; s != NULL; s = s->next)
- {
- if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL
- || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)
- && elf_section_data (s)->this_hdr.sh_info > 0)
- {
- unsigned long targ_index;
- asection *targ_sec;
-
- targ_index = elf_section_data (s)->this_hdr.sh_info;
- targ_sec = bfd_section_from_elf_index (abfd, targ_index);
- if (targ_sec != NULL
- && (targ_sec->flags & SEC_DEBUGGING) != 0)
- s->flags |= SEC_DEBUGGING;
- }
- }
- return target;
-
- got_wrong_format_error:
- bfd_set_error (bfd_error_wrong_format);
-
- got_no_match:
- return NULL;
-}
-
-/* ELF .o/exec file writing */
-
-/* Write out the relocs. */
-
-void
-elf_write_relocs (bfd *abfd, asection *sec, void *data)
-{
- bfd_boolean *failedp = (bfd_boolean *) data;
- Elf_Internal_Shdr *rela_hdr;
- bfd_vma addr_offset;
- void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
- size_t extsize;
- bfd_byte *dst_rela;
- unsigned int idx;
- asymbol *last_sym;
- int last_sym_idx;
-
- /* If we have already failed, don't do anything. */
- if (*failedp)
- return;
-
- if ((sec->flags & SEC_RELOC) == 0)
- return;
-
- /* The linker backend writes the relocs out itself, and sets the
- reloc_count field to zero to inhibit writing them here. Also,
- sometimes the SEC_RELOC flag gets set even when there aren't any
- relocs. */
- if (sec->reloc_count == 0)
- return;
-
- /* If we have opened an existing file for update, reloc_count may be
- set even though we are not linking. In that case we have nothing
- to do. */
- if (sec->orelocation == NULL)
- return;
-
- rela_hdr = elf_section_data (sec)->rela.hdr;
- if (rela_hdr == NULL)
- rela_hdr = elf_section_data (sec)->rel.hdr;
-
- rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
- rela_hdr->contents = (unsigned char *) bfd_alloc (abfd, rela_hdr->sh_size);
- if (rela_hdr->contents == NULL)
- {
- *failedp = TRUE;
- return;
- }
-
- /* Figure out whether the relocations are RELA or REL relocations. */
- if (rela_hdr->sh_type == SHT_RELA)
- {
- swap_out = elf_swap_reloca_out;
- extsize = sizeof (Elf_External_Rela);
- }
- else if (rela_hdr->sh_type == SHT_REL)
- {
- swap_out = elf_swap_reloc_out;
- extsize = sizeof (Elf_External_Rel);
- }
- else
- /* Every relocation section should be either an SHT_RELA or an
- SHT_REL section. */
- abort ();
-
- /* The address of an ELF reloc is section relative for an object
- file, and absolute for an executable file or shared library.
- The address of a BFD reloc is always section relative. */
- addr_offset = 0;
- if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
- addr_offset = sec->vma;
-
- /* orelocation has the data, reloc_count has the count... */
- last_sym = 0;
- last_sym_idx = 0;
- dst_rela = rela_hdr->contents;
-
- for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize)
- {
- Elf_Internal_Rela src_rela;
- arelent *ptr;
- asymbol *sym;
- int n;
-
- ptr = sec->orelocation[idx];
- sym = *ptr->sym_ptr_ptr;
- if (sym == last_sym)
- n = last_sym_idx;
- else if (bfd_is_abs_section (sym->section) && sym->value == 0)
- n = STN_UNDEF;
- else
- {
- last_sym = sym;
- n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
- if (n < 0)
- {
- *failedp = TRUE;
- return;
- }
- last_sym_idx = n;
- }
-
- if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
- && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
- && ! _bfd_elf_validate_reloc (abfd, ptr))
- {
- *failedp = TRUE;
- return;
- }
-
- src_rela.r_offset = ptr->address + addr_offset;
- src_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
- src_rela.r_addend = ptr->addend;
- (*swap_out) (abfd, &src_rela, dst_rela);
- }
-}
-
-/* Write out the program headers. */
-
-int
-elf_write_out_phdrs (bfd *abfd,
- const Elf_Internal_Phdr *phdr,
- unsigned int count)
-{
- while (count--)
- {
- Elf_External_Phdr extphdr;
- elf_swap_phdr_out (abfd, phdr, &extphdr);
- if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd)
- != sizeof (Elf_External_Phdr))
- return -1;
- phdr++;
- }
- return 0;
-}
-
-/* Write out the section headers and the ELF file header. */
-
-bfd_boolean
-elf_write_shdrs_and_ehdr (bfd *abfd)
-{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_External_Shdr *x_shdrp; /* Section header table, external form */
- Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
- unsigned int count;
- bfd_size_type amt;
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
-
- /* swap the header before spitting it out... */
-
-#if DEBUG & 1
- elf_debug_file (i_ehdrp);
-#endif
- elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
- amt = sizeof (x_ehdr);
- if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
- || bfd_bwrite (&x_ehdr, amt, abfd) != amt)
- return FALSE;
-
- /* Some fields in the first section header handle overflow of ehdr
- fields. */
- if (i_ehdrp->e_phnum >= PN_XNUM)
- i_shdrp[0]->sh_info = i_ehdrp->e_phnum;
- if (i_ehdrp->e_shnum >= (SHN_LORESERVE & 0xffff))
- i_shdrp[0]->sh_size = i_ehdrp->e_shnum;
- if (i_ehdrp->e_shstrndx >= (SHN_LORESERVE & 0xffff))
- i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx;
-
- /* at this point we've concocted all the ELF sections... */
- amt = i_ehdrp->e_shnum;
- amt *= sizeof (*x_shdrp);
- x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt);
- if (!x_shdrp)
- return FALSE;
-
- for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++)
- {
-#if DEBUG & 2
- elf_debug_section (count, *i_shdrp);
-#endif
- elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count);
- }
- if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
- || bfd_bwrite (x_shdrp, amt, abfd) != amt)
- return FALSE;
-
- /* need to dump the string table too... */
-
- return TRUE;
-}
-
-bfd_boolean
-elf_checksum_contents (bfd *abfd,
- void (*process) (const void *, size_t, void *),
- void *arg)
-{
- Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
- Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
- Elf_Internal_Phdr *i_phdrp = elf_tdata (abfd)->phdr;
- unsigned int count, num;
-
- {
- Elf_External_Ehdr x_ehdr;
- Elf_Internal_Ehdr i_ehdr;
-
- i_ehdr = *i_ehdrp;
- i_ehdr.e_phoff = i_ehdr.e_shoff = 0;
- elf_swap_ehdr_out (abfd, &i_ehdr, &x_ehdr);
- (*process) (&x_ehdr, sizeof x_ehdr, arg);
- }
-
- num = i_ehdrp->e_phnum;
- for (count = 0; count < num; count++)
- {
- Elf_External_Phdr x_phdr;
- elf_swap_phdr_out (abfd, &i_phdrp[count], &x_phdr);
- (*process) (&x_phdr, sizeof x_phdr, arg);
- }
-
- num = elf_numsections (abfd);
- for (count = 0; count < num; count++)
- {
- Elf_Internal_Shdr i_shdr;
- Elf_External_Shdr x_shdr;
- bfd_byte *contents, *free_contents;
-
- i_shdr = *i_shdrp[count];
- i_shdr.sh_offset = 0;
-
- elf_swap_shdr_out (abfd, &i_shdr, &x_shdr);
- (*process) (&x_shdr, sizeof x_shdr, arg);
-
- /* Process the section's contents, if it has some.
- PR ld/12451: Read them in if necessary. */
- if (i_shdr.sh_type == SHT_NOBITS)
- continue;
- free_contents = NULL;
- contents = i_shdr.contents;
- if (contents == NULL)
- {
- asection *sec;
-
- sec = bfd_section_from_elf_index (abfd, count);
- if (sec != NULL)
- {
- contents = sec->contents;
- if (contents == NULL)
- {
- /* Force rereading from file. */
- sec->flags &= ~SEC_IN_MEMORY;
- if (!bfd_malloc_and_get_section (abfd, sec, &free_contents))
- continue;
- contents = free_contents;
- }
- }
- }
- if (contents != NULL)
- {
- (*process) (contents, i_shdr.sh_size, arg);
- if (free_contents != NULL)
- free (free_contents);
- }
- }
-
- return TRUE;
-}
-
-long
-elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic)
-{
- Elf_Internal_Shdr *hdr;
- Elf_Internal_Shdr *verhdr;
- unsigned long symcount; /* Number of external ELF symbols */
- elf_symbol_type *sym; /* Pointer to current bfd symbol */
- elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
- Elf_Internal_Sym *isym;
- Elf_Internal_Sym *isymend;
- Elf_Internal_Sym *isymbuf = NULL;
- Elf_External_Versym *xver;
- Elf_External_Versym *xverbuf = NULL;
- const struct elf_backend_data *ebd;
- bfd_size_type amt;
-
- /* Read each raw ELF symbol, converting from external ELF form to
- internal ELF form, and then using the information to create a
- canonical bfd symbol table entry.
-
- Note that we allocate the initial bfd canonical symbol buffer
- based on a one-to-one mapping of the ELF symbols to canonical
- symbols. We actually use all the ELF symbols, so there will be no
- space left over at the end. When we have all the symbols, we
- build the caller's pointer vector. */
-
- if (! dynamic)
- {
- hdr = &elf_tdata (abfd)->symtab_hdr;
- verhdr = NULL;
- }
- else
- {
- hdr = &elf_tdata (abfd)->dynsymtab_hdr;
- if (elf_dynversym (abfd) == 0)
- verhdr = NULL;
- else
- verhdr = &elf_tdata (abfd)->dynversym_hdr;
- if ((elf_dynverdef (abfd) != 0
- && elf_tdata (abfd)->verdef == NULL)
- || (elf_dynverref (abfd) != 0
- && elf_tdata (abfd)->verref == NULL))
- {
- if (!_bfd_elf_slurp_version_tables (abfd, FALSE))
- return -1;
- }
- }
-
- ebd = get_elf_backend_data (abfd);
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- if (symcount == 0)
- sym = symbase = NULL;
- else
- {
- isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0,
- NULL, NULL, NULL);
- if (isymbuf == NULL)
- return -1;
-
- amt = symcount;
- amt *= sizeof (elf_symbol_type);
- symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt);
- if (symbase == (elf_symbol_type *) NULL)
- goto error_return;
-
- /* Read the raw ELF version symbol information. */
- if (verhdr != NULL
- && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount)
- {
- (*_bfd_error_handler)
- (_("%s: version count (%ld) does not match symbol count (%ld)"),
- abfd->filename,
- (long) (verhdr->sh_size / sizeof (Elf_External_Versym)),
- symcount);
-
- /* Slurp in the symbols without the version information,
- since that is more helpful than just quitting. */
- verhdr = NULL;
- }
-
- if (verhdr != NULL)
- {
- if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0)
- goto error_return;
-
- xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size);
- if (xverbuf == NULL && verhdr->sh_size != 0)
- goto error_return;
-
- if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size)
- goto error_return;
- }
-
- /* Skip first symbol, which is a null dummy. */
- xver = xverbuf;
- if (xver != NULL)
- ++xver;
- isymend = isymbuf + symcount;
- for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++)
- {
- memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym));
- sym->symbol.the_bfd = abfd;
-
- sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL);
-
- sym->symbol.value = isym->st_value;
-
- if (isym->st_shndx == SHN_UNDEF)
- {
- sym->symbol.section = bfd_und_section_ptr;
- }
- else if (isym->st_shndx == SHN_ABS)
- {
- sym->symbol.section = bfd_abs_section_ptr;
- }
- else if (isym->st_shndx == SHN_COMMON)
- {
- sym->symbol.section = bfd_com_section_ptr;
- if ((abfd->flags & BFD_PLUGIN) != 0)
- {
- asection *xc = bfd_get_section_by_name (abfd, "COMMON");
-
- if (xc == NULL)
- {
- flagword flags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP
- | SEC_EXCLUDE);
- xc = bfd_make_section_with_flags (abfd, "COMMON", flags);
- if (xc == NULL)
- goto error_return;
- }
- sym->symbol.section = xc;
- }
- /* Elf puts the alignment into the `value' field, and
- the size into the `size' field. BFD wants to see the
- size in the value field, and doesn't care (at the
- moment) about the alignment. */
- sym->symbol.value = isym->st_size;
- }
- else
- {
- sym->symbol.section
- = bfd_section_from_elf_index (abfd, isym->st_shndx);
- if (sym->symbol.section == NULL)
- {
- /* This symbol is in a section for which we did not
- create a BFD section. Just use bfd_abs_section,
- although it is wrong. FIXME. */
- sym->symbol.section = bfd_abs_section_ptr;
- }
- }
-
- /* If this is a relocatable file, then the symbol value is
- already section relative. */
- if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
- sym->symbol.value -= sym->symbol.section->vma;
-
- switch (ELF_ST_BIND (isym->st_info))
- {
- case STB_LOCAL:
- sym->symbol.flags |= BSF_LOCAL;
- break;
- case STB_GLOBAL:
- if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON)
- sym->symbol.flags |= BSF_GLOBAL;
- break;
- case STB_WEAK:
- sym->symbol.flags |= BSF_WEAK;
- break;
- case STB_GNU_UNIQUE:
- sym->symbol.flags |= BSF_GNU_UNIQUE;
- break;
- }
-
- switch (ELF_ST_TYPE (isym->st_info))
- {
- case STT_SECTION:
- sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
- break;
- case STT_FILE:
- sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
- break;
- case STT_FUNC:
- sym->symbol.flags |= BSF_FUNCTION;
- break;
- case STT_COMMON:
- /* FIXME: Do we have to put the size field into the value field
- as we do with symbols in SHN_COMMON sections (see above) ? */
- /* Fall through. */
- case STT_OBJECT:
- sym->symbol.flags |= BSF_OBJECT;
- break;
- case STT_TLS:
- sym->symbol.flags |= BSF_THREAD_LOCAL;
- break;
- case STT_RELC:
- sym->symbol.flags |= BSF_RELC;
- break;
- case STT_SRELC:
- sym->symbol.flags |= BSF_SRELC;
- break;
- case STT_GNU_IFUNC:
- sym->symbol.flags |= BSF_GNU_INDIRECT_FUNCTION;
- break;
- }
-
- if (dynamic)
- sym->symbol.flags |= BSF_DYNAMIC;
-
- if (xver != NULL)
- {
- Elf_Internal_Versym iversym;
-
- _bfd_elf_swap_versym_in (abfd, xver, &iversym);
- sym->version = iversym.vs_vers;
- xver++;
- }
-
- /* Do some backend-specific processing on this symbol. */
- if (ebd->elf_backend_symbol_processing)
- (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
- }
- }
-
- /* Do some backend-specific processing on this symbol table. */
- if (ebd->elf_backend_symbol_table_processing)
- (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
-
- /* We rely on the zalloc to clear out the final symbol entry. */
-
- symcount = sym - symbase;
-
- /* Fill in the user's symbol pointer vector if needed. */
- if (symptrs)
- {
- long l = symcount;
-
- sym = symbase;
- while (l-- > 0)
- {
- *symptrs++ = &sym->symbol;
- sym++;
- }
- *symptrs = 0; /* Final null pointer */
- }
-
- if (xverbuf != NULL)
- free (xverbuf);
- if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
- free (isymbuf);
- return symcount;
-
-error_return:
- if (xverbuf != NULL)
- free (xverbuf);
- if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
- free (isymbuf);
- return -1;
-}
-
-/* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
- them. */
-
-static bfd_boolean
-elf_slurp_reloc_table_from_section (bfd *abfd,
- asection *asect,
- Elf_Internal_Shdr *rel_hdr,
- bfd_size_type reloc_count,
- arelent *relents,
- asymbol **symbols,
- bfd_boolean dynamic)
-{
- const struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
- void *allocated = NULL;
- bfd_byte *native_relocs;
- arelent *relent;
- unsigned int i;
- int entsize;
- unsigned int symcount;
-
- allocated = bfd_malloc (rel_hdr->sh_size);
- if (allocated == NULL)
- goto error_return;
-
- if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
- || (bfd_bread (allocated, rel_hdr->sh_size, abfd)
- != rel_hdr->sh_size))
- goto error_return;
-
- native_relocs = (bfd_byte *) allocated;
-
- entsize = rel_hdr->sh_entsize;
- BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
- || entsize == sizeof (Elf_External_Rela));
-
- if (dynamic)
- symcount = bfd_get_dynamic_symcount (abfd);
- else
- symcount = bfd_get_symcount (abfd);
-
- for (i = 0, relent = relents;
- i < reloc_count;
- i++, relent++, native_relocs += entsize)
- {
- Elf_Internal_Rela rela;
-
- if (entsize == sizeof (Elf_External_Rela))
- elf_swap_reloca_in (abfd, native_relocs, &rela);
- else
- elf_swap_reloc_in (abfd, native_relocs, &rela);
-
- /* The address of an ELF reloc is section relative for an object
- file, and absolute for an executable file or shared library.
- The address of a normal BFD reloc is always section relative,
- and the address of a dynamic reloc is absolute.. */
- if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
- relent->address = rela.r_offset;
- else
- relent->address = rela.r_offset - asect->vma;
-
- if (ELF_R_SYM (rela.r_info) == STN_UNDEF)
- relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
- else if (ELF_R_SYM (rela.r_info) > symcount)
- {
- (*_bfd_error_handler)
- (_("%s(%s): relocation %d has invalid symbol index %ld"),
- abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info));
- relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
- }
- else
- {
- asymbol **ps;
-
- ps = symbols + ELF_R_SYM (rela.r_info) - 1;
-
- relent->sym_ptr_ptr = ps;
- }
-
- relent->addend = rela.r_addend;
-
- if ((entsize == sizeof (Elf_External_Rela)
- && ebd->elf_info_to_howto != NULL)
- || ebd->elf_info_to_howto_rel == NULL)
- (*ebd->elf_info_to_howto) (abfd, relent, &rela);
- else
- (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela);
- }
-
- if (allocated != NULL)
- free (allocated);
-
- return TRUE;
-
- error_return:
- if (allocated != NULL)
- free (allocated);
- return FALSE;
-}
-
-/* Read in and swap the external relocs. */
-
-bfd_boolean
-elf_slurp_reloc_table (bfd *abfd,
- asection *asect,
- asymbol **symbols,
- bfd_boolean dynamic)
-{
- struct bfd_elf_section_data * const d = elf_section_data (asect);
- Elf_Internal_Shdr *rel_hdr;
- Elf_Internal_Shdr *rel_hdr2;
- bfd_size_type reloc_count;
- bfd_size_type reloc_count2;
- arelent *relents;
- bfd_size_type amt;
-
- if (asect->relocation != NULL)
- return TRUE;
-
- if (! dynamic)
- {
- if ((asect->flags & SEC_RELOC) == 0
- || asect->reloc_count == 0)
- return TRUE;
-
- rel_hdr = d->rel.hdr;
- reloc_count = rel_hdr ? NUM_SHDR_ENTRIES (rel_hdr) : 0;
- rel_hdr2 = d->rela.hdr;
- reloc_count2 = rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0;
-
- BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2);
- BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset)
- || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
-
- }
- else
- {
- /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
- case because relocations against this section may use the
- dynamic symbol table, and in that case bfd_section_from_shdr
- in elf.c does not update the RELOC_COUNT. */
- if (asect->size == 0)
- return TRUE;
-
- rel_hdr = &d->this_hdr;
- reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
- rel_hdr2 = NULL;
- reloc_count2 = 0;
- }
-
- amt = (reloc_count + reloc_count2) * sizeof (arelent);
- relents = (arelent *) bfd_alloc (abfd, amt);
- if (relents == NULL)
- return FALSE;
-
- if (rel_hdr
- && !elf_slurp_reloc_table_from_section (abfd, asect,
- rel_hdr, reloc_count,
- relents,
- symbols, dynamic))
- return FALSE;
-
- if (rel_hdr2
- && !elf_slurp_reloc_table_from_section (abfd, asect,
- rel_hdr2, reloc_count2,
- relents + reloc_count,
- symbols, dynamic))
- return FALSE;
-
- asect->relocation = relents;
- return TRUE;
-}
-
-#if DEBUG & 2
-static void
-elf_debug_section (int num, Elf_Internal_Shdr *hdr)
-{
- fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
- hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
- (long) hdr);
- fprintf (stderr,
- "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
- (long) hdr->sh_name,
- (long) hdr->sh_type,
- (long) hdr->sh_flags);
- fprintf (stderr,
- "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
- (long) hdr->sh_addr,
- (long) hdr->sh_offset,
- (long) hdr->sh_size);
- fprintf (stderr,
- "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
- (long) hdr->sh_link,
- (long) hdr->sh_info,
- (long) hdr->sh_addralign);
- fprintf (stderr, "sh_entsize = %ld\n",
- (long) hdr->sh_entsize);
- fflush (stderr);
-}
-#endif
-
-#if DEBUG & 1
-static void
-elf_debug_file (Elf_Internal_Ehdr *ehdrp)
-{
- fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
- fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
- fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
- fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
- fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
- fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
- fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
-}
-#endif
-
-/* Create a new BFD as if by bfd_openr. Rather than opening a file,
- reconstruct an ELF file by reading the segments out of remote memory
- based on the ELF file header at EHDR_VMA and the ELF program headers it
- points to. If not null, *LOADBASEP is filled in with the difference
- between the VMAs from which the segments were read, and the VMAs the
- file headers (and hence BFD's idea of each section's VMA) put them at.
-
- The function TARGET_READ_MEMORY is called to copy LEN bytes from the
- remote memory at target address VMA into the local buffer at MYADDR; it
- should return zero on success or an `errno' code on failure. TEMPL must
- be a BFD for a target with the word size and byte order found in the
- remote memory. */
-
-bfd *
-NAME(_bfd_elf,bfd_from_remote_memory)
- (bfd *templ,
- bfd_vma ehdr_vma,
- bfd_vma *loadbasep,
- int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
-{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
- Elf_External_Phdr *x_phdrs;
- Elf_Internal_Phdr *i_phdrs, *last_phdr;
- bfd *nbfd;
- struct bfd_in_memory *bim;
- int contents_size;
- bfd_byte *contents;
- int err;
- unsigned int i;
- bfd_vma loadbase;
- bfd_boolean loadbase_set;
-
- /* Read in the ELF header in external format. */
- err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr);
- if (err)
- {
- bfd_set_error (bfd_error_system_call);
- errno = err;
- return NULL;
- }
-
- /* Now check to see if we have a valid ELF file, and one that BFD can
- make use of. The magic number must match, the address size ('class')
- and byte-swapping must match our XVEC entry. */
-
- if (! elf_file_p (&x_ehdr)
- || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
- || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
- {
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- /* Check that file's byte order matches xvec's */
- switch (x_ehdr.e_ident[EI_DATA])
- {
- case ELFDATA2MSB: /* Big-endian */
- if (! bfd_header_big_endian (templ))
- {
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
- break;
- case ELFDATA2LSB: /* Little-endian */
- if (! bfd_header_little_endian (templ))
- {
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr);
-
- /* The file header tells where to find the program headers.
- These are what we use to actually choose what to read. */
-
- if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0)
- {
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- x_phdrs = (Elf_External_Phdr *)
- bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs));
- if (x_phdrs == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs,
- i_ehdr.e_phnum * sizeof x_phdrs[0]);
- if (err)
- {
- free (x_phdrs);
- bfd_set_error (bfd_error_system_call);
- errno = err;
- return NULL;
- }
- i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum];
-
- contents_size = 0;
- last_phdr = NULL;
- loadbase = ehdr_vma;
- loadbase_set = FALSE;
- for (i = 0; i < i_ehdr.e_phnum; ++i)
- {
- elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]);
- if (i_phdrs[i].p_type == PT_LOAD)
- {
- bfd_vma segment_end;
- segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz
- + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align;
- if (segment_end > (bfd_vma) contents_size)
- contents_size = segment_end;
-
- /* LOADADDR is the `Base address' from the gELF specification:
- `lowest p_vaddr value for a PT_LOAD segment' is P_VADDR from the
- first PT_LOAD as PT_LOADs are ordered by P_VADDR. */
- if (!loadbase_set && (i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0)
- {
- loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align);
- loadbase_set = TRUE;
- }
-
- last_phdr = &i_phdrs[i];
- }
- }
- if (last_phdr == NULL)
- {
- /* There were no PT_LOAD segments, so we don't have anything to read. */
- free (x_phdrs);
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- /* 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. */
- if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz
- && (bfd_vma) contents_size >= (i_ehdr.e_shoff
- + i_ehdr.e_shnum * i_ehdr.e_shentsize))
- {
- contents_size = last_phdr->p_offset + last_phdr->p_filesz;
- if ((bfd_vma) contents_size < (i_ehdr.e_shoff
- + i_ehdr.e_shnum * i_ehdr.e_shentsize))
- contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize;
- }
- else
- contents_size = last_phdr->p_offset + last_phdr->p_filesz;
-
- /* Now we know the size of the whole image we want read in. */
- contents = (bfd_byte *) bfd_zmalloc (contents_size);
- if (contents == NULL)
- {
- free (x_phdrs);
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
-
- for (i = 0; i < i_ehdr.e_phnum; ++i)
- if (i_phdrs[i].p_type == PT_LOAD)
- {
- bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align;
- bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz
- + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align;
- if (end > (bfd_vma) contents_size)
- end = contents_size;
- err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr)
- & -i_phdrs[i].p_align,
- contents + start, end - start);
- if (err)
- {
- free (x_phdrs);
- free (contents);
- bfd_set_error (bfd_error_system_call);
- errno = err;
- return NULL;
- }
- }
- free (x_phdrs);
-
- /* If the segments visible in memory didn't include the section headers,
- then clear them from the file header. */
- if ((bfd_vma) contents_size < (i_ehdr.e_shoff
- + i_ehdr.e_shnum * i_ehdr.e_shentsize))
- {
- memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff);
- memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum);
- memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx);
- }
-
- /* This will normally have been in the first PT_LOAD segment. But it
- conceivably could be missing, and we might have just changed it. */
- memcpy (contents, &x_ehdr, sizeof x_ehdr);
-
- /* Now we have a memory image of the ELF file contents. Make a BFD. */
- bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory));
- if (bim == NULL)
- {
- free (contents);
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- nbfd = _bfd_new_bfd ();
- if (nbfd == NULL)
- {
- free (bim);
- free (contents);
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- nbfd->filename = "<in-memory>";
- nbfd->xvec = templ->xvec;
- bim->size = contents_size;
- bim->buffer = contents;
- nbfd->iostream = bim;
- nbfd->flags = BFD_IN_MEMORY;
- nbfd->iovec = &_bfd_memory_iovec;
- nbfd->origin = 0;
- nbfd->direction = read_direction;
- nbfd->mtime = time (NULL);
- nbfd->mtime_set = TRUE;
-
- if (loadbasep)
- *loadbasep = loadbase;
- return nbfd;
-}
-
-/* Function for ELF_R_INFO. */
-
-bfd_vma
-NAME(elf,r_info) (bfd_vma sym, bfd_vma type)
-{
- return ELF_R_INFO (sym, type);
-}
-
-/* Function for ELF_R_SYM. */
-
-bfd_vma
-NAME(elf,r_sym) (bfd_vma r_info)
-{
- return ELF_R_SYM (r_info);
-}
-
-#include "elfcore.h"
-
-/* Size-dependent data and functions. */
-const struct elf_size_info NAME(_bfd_elf,size_info) = {
- sizeof (Elf_External_Ehdr),
- sizeof (Elf_External_Phdr),
- sizeof (Elf_External_Shdr),
- sizeof (Elf_External_Rel),
- sizeof (Elf_External_Rela),
- sizeof (Elf_External_Sym),
- sizeof (Elf_External_Dyn),
- sizeof (Elf_External_Note),
- 4,
- 1,
- ARCH_SIZE, LOG_FILE_ALIGN,
- ELFCLASS, EV_CURRENT,
- elf_write_out_phdrs,
- elf_write_shdrs_and_ehdr,
- elf_checksum_contents,
- elf_write_relocs,
- elf_swap_symbol_in,
- elf_swap_symbol_out,
- elf_slurp_reloc_table,
- elf_slurp_symbol_table,
- elf_swap_dyn_in,
- elf_swap_dyn_out,
- elf_swap_reloc_in,
- elf_swap_reloc_out,
- elf_swap_reloca_in,
- elf_swap_reloca_out
-};