diff options
Diffstat (limited to 'binutils-2.25/bfd/hpux-core.c')
| -rw-r--r-- | binutils-2.25/bfd/hpux-core.c | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/hpux-core.c b/binutils-2.25/bfd/hpux-core.c new file mode 100644 index 00000000..3731210e --- /dev/null +++ b/binutils-2.25/bfd/hpux-core.c @@ -0,0 +1,429 @@ +/* BFD back-end for HP/UX core files. + Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006, + 2007, 2008, 2010, 2011, 2012 Free Software Foundation, Inc. + Written by Stu Grossman, Cygnus Support. + Converted to back-end form by Ian Lance Taylor, Cygnus SUpport + + 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. */ + + +/* This file can only be compiled on systems which use HP/UX style + core files. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" + +#if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX) + +/* FIXME: sys/core.h doesn't exist for HPUX version 7. HPUX version + 5, 6, and 7 core files seem to be standard trad-core.c type core + files; can we just use trad-core.c in addition to this file? */ + +#include <sys/core.h> +#include <sys/utsname.h> + +#endif /* HOST_HPPAHPUX */ + +#ifdef HOST_HPPABSD + +/* Not a very swift place to put it, but that's where the BSD port + puts them. */ +#include "/hpux/usr/include/sys/core.h" + +#endif /* HOST_HPPABSD */ + +#include <sys/param.h> +#ifdef HAVE_DIRENT_H +# include <dirent.h> +#else +# ifdef HAVE_SYS_NDIR_H +# include <sys/ndir.h> +# endif +# ifdef HAVE_SYS_DIR_H +# include <sys/dir.h> +# endif +# ifdef HAVE_NDIR_H +# include <ndir.h> +# endif +#endif +#include <signal.h> +#ifdef HPUX_CORE +#include <machine/reg.h> +#endif +#include <sys/file.h> + +/* Kludge: There's no explicit mechanism provided by sys/core.h to + conditionally know whether a proc_info has thread id fields. + However, CORE_ANON_SHMEM shows up first at 10.30, which is + happily also when meaningful thread id's show up in proc_info. */ +#if defined(CORE_ANON_SHMEM) +#define PROC_INFO_HAS_THREAD_ID (1) +#endif + +/* This type appears at HP-UX 10.30. Defining it if not defined + by sys/core.h allows us to build for older HP-UX's, and (since + it won't be encountered in core-dumps from older HP-UX's) is + harmless. */ +#if !defined(CORE_ANON_SHMEM) +#define CORE_ANON_SHMEM 0x00000200 /* anonymous shared memory */ +#endif + +/* These are stored in the bfd's tdata */ + +/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they + are set to 0. Also, until HP-UX implements MxN threads, .user_tid and + .lwpid are synonymous. */ +struct hpux_core_struct +{ + int sig; + int lwpid; /* Kernel thread ID. */ + unsigned long user_tid; /* User thread ID. */ + char cmd[MAXCOMLEN + 1]; +}; + +#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data) +#define core_signal(bfd) (core_hdr(bfd)->sig) +#define core_command(bfd) (core_hdr(bfd)->cmd) +#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid) +#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid) +#define hpux_core_core_file_matches_executable_p generic_core_file_matches_executable_p +#define hpux_core_core_file_pid _bfd_nocore_core_file_pid + +static asection *make_bfd_asection (bfd *, const char *, flagword, + bfd_size_type, bfd_vma, unsigned int); +static const bfd_target *hpux_core_core_file_p (bfd *); +static char *hpux_core_core_file_failing_command (bfd *); +static int hpux_core_core_file_failing_signal (bfd *); +static void swap_abort (void); + +static asection * +make_bfd_asection (bfd *abfd, const char *name, flagword flags, + bfd_size_type size, bfd_vma vma, + unsigned int alignment_power) +{ + asection *asect; + char *newname; + + newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1); + if (!newname) + return NULL; + + strcpy (newname, name); + + asect = bfd_make_section_anyway_with_flags (abfd, newname, flags); + if (!asect) + return NULL; + + asect->size = size; + asect->vma = vma; + asect->filepos = bfd_tell (abfd); + asect->alignment_power = alignment_power; + + return asect; +} + +/* Return true if the given core file section corresponds to a thread, + based on its name. */ + +static int +thread_section_p (bfd *abfd ATTRIBUTE_UNUSED, + asection *sect, + void *obj ATTRIBUTE_UNUSED) +{ + return CONST_STRNEQ (sect->name, ".reg/"); +} + +/* this function builds a bfd target if the file is a corefile. + It returns null or 0 if it finds out thaat it is not a core file. + The way it checks this is by looking for allowed 'type' field values. + These are declared in sys/core.h + There are some values which are 'reserved for future use'. In particular + CORE_NONE is actually defined as 0. This may be a catch-all for cases + in which the core file is generated by some non-hpux application. + (I am just guessing here!) +*/ +static const bfd_target * +hpux_core_core_file_p (bfd *abfd) +{ + int good_sections = 0; + int unknown_sections = 0; + + core_hdr (abfd) = (struct hpux_core_struct *) + bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct)); + if (!core_hdr (abfd)) + return NULL; + + while (1) + { + int val; + struct corehead core_header; + + val = bfd_bread ((void *) &core_header, + (bfd_size_type) sizeof core_header, abfd); + if (val <= 0) + break; + switch (core_header.type) + { + case CORE_KERNEL: + case CORE_FORMAT: + /* Just skip this. */ + bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); + good_sections++; + break; + case CORE_EXEC: + { + struct proc_exec proc_exec; + if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len, + abfd) != core_header.len) + break; + strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1); + good_sections++; + } + break; + case CORE_PROC: + { + struct proc_info proc_info; + char secname[100]; /* Of arbitrary size, but plenty large. */ + + /* We need to read this section, 'cause we need to determine + whether the core-dumped app was threaded before we create + any .reg sections. */ + if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd) + != core_header.len) + break; + + /* However, we also want to create those sections with the + file positioned at the start of the record, it seems. */ + if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0) + break; + +#if defined(PROC_INFO_HAS_THREAD_ID) + core_kernel_thread_id (abfd) = proc_info.lwpid; + core_user_thread_id (abfd) = proc_info.user_tid; +#else + core_kernel_thread_id (abfd) = 0; + core_user_thread_id (abfd) = 0; +#endif + /* If the program was unthreaded, then we'll just create a + .reg section. + + If the program was threaded, then we'll create .reg/XXXXX + section for each thread, where XXXXX is a printable + representation of the kernel thread id. We'll also + create a .reg section for the thread that was running + and signalled at the time of the core-dump (i.e., this + is effectively an alias, needed to keep GDB happy.) + + Note that we use `.reg/XXXXX' as opposed to '.regXXXXX' + because GDB expects that .reg2 will be the floating- + point registers. */ + if (core_kernel_thread_id (abfd) == 0) + { + if (!make_bfd_asection (abfd, ".reg", + SEC_HAS_CONTENTS, + core_header.len, + (bfd_vma) offsetof (struct proc_info, + hw_regs), + 2)) + goto fail; + } + else + { + /* There are threads. Is this the one that caused the + core-dump? We'll claim it was the running thread. */ + if (proc_info.sig != -1) + { + if (!make_bfd_asection (abfd, ".reg", + SEC_HAS_CONTENTS, + core_header.len, + (bfd_vma)offsetof (struct proc_info, + hw_regs), + 2)) + goto fail; + } + /* We always make one of these sections, for every thread. */ + sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd)); + if (!make_bfd_asection (abfd, secname, + SEC_HAS_CONTENTS, + core_header.len, + (bfd_vma) offsetof (struct proc_info, + hw_regs), + 2)) + goto fail; + } + core_signal (abfd) = proc_info.sig; + if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0) + break; + good_sections++; + } + break; + + case CORE_DATA: + case CORE_STACK: + case CORE_TEXT: + case CORE_MMF: + case CORE_SHM: + case CORE_ANON_SHMEM: + if (!make_bfd_asection (abfd, ".data", + SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, + core_header.len, + (bfd_vma) core_header.addr, 2)) + goto fail; + + bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); + good_sections++; + break; + + case CORE_NONE: + /* Let's not punt if we encounter a section of unknown + type. Rather, let's make a note of it. If we later + see that there were also "good" sections, then we'll + declare that this a core file, but we'll also warn that + it may be incompatible with this gdb. + */ + unknown_sections++; + break; + + default: + goto fail; /*unrecognized core file type */ + } + } + + /* OK, we believe you. You're a core file (sure, sure). */ + + /* On HP/UX, we sometimes encounter core files where none of the threads + was found to be the running thread (ie the signal was set to -1 for + all threads). This happens when the program was aborted externally + via a TT_CORE ttrace system call. In that case, we just pick one + thread at random to be the active thread. */ + if (core_kernel_thread_id (abfd) != 0 + && bfd_get_section_by_name (abfd, ".reg") == NULL) + { + asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL); + asection *reg_sect; + + if (asect != NULL) + { + reg_sect = make_bfd_asection (abfd, ".reg", asect->flags, + asect->size, asect->vma, + asect->alignment_power); + if (reg_sect == NULL) + goto fail; + + reg_sect->filepos = asect->filepos; + } + } + + /* Were there sections of unknown type? If so, yet there were + at least some complete sections of known type, then, issue + a warning. Possibly the core file was generated on a version + of HP-UX that is incompatible with that for which this gdb was + built. + */ + if ((unknown_sections > 0) && (good_sections > 0)) + (*_bfd_error_handler) + ("%s appears to be a core file,\nbut contains unknown sections. It may have been created on an incompatible\nversion of HP-UX. As a result, some information may be unavailable.\n", + abfd->filename); + + return abfd->xvec; + + fail: + bfd_release (abfd, core_hdr (abfd)); + core_hdr (abfd) = NULL; + bfd_section_list_clear (abfd); + return NULL; +} + +static char * +hpux_core_core_file_failing_command (bfd *abfd) +{ + return core_command (abfd); +} + +static int +hpux_core_core_file_failing_signal (bfd *abfd) +{ + return core_signal (abfd); +} + + +/* If somebody calls any byte-swapping routines, shoot them. */ +static void +swap_abort (void) +{ + abort(); /* This way doesn't require any declaration for ANSI to fuck up */ +} + +#define NO_GET ((bfd_vma (*) (const void *)) swap_abort) +#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) +#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) +#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) +#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) +#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) + +const bfd_target hpux_core_vec = + { + "hpux-core", + bfd_target_unknown_flavour, + BFD_ENDIAN_BIG, /* target byte order */ + BFD_ENDIAN_BIG, /* target headers byte order */ + (HAS_RELOC | EXEC_P | /* object flags */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ + 0, /* symbol prefix */ + ' ', /* ar_pad_char */ + 16, /* ar_max_namelen */ + 0, /* match priority. */ + NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ + NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ + NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ + NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ + NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ + NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ + + { /* bfd_check_format */ + _bfd_dummy_target, /* unknown format */ + _bfd_dummy_target, /* object file */ + _bfd_dummy_target, /* archive */ + hpux_core_core_file_p /* a core file */ + }, + { /* bfd_set_format */ + bfd_false, bfd_false, + bfd_false, bfd_false + }, + { /* bfd_write_contents */ + bfd_false, bfd_false, + bfd_false, bfd_false + }, + + BFD_JUMP_TABLE_GENERIC (_bfd_generic), + BFD_JUMP_TABLE_COPY (_bfd_generic), + BFD_JUMP_TABLE_CORE (hpux_core), + BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), + BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), + BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), + BFD_JUMP_TABLE_WRITE (_bfd_generic), + BFD_JUMP_TABLE_LINK (_bfd_nolink), + BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), + + NULL, + + NULL /* backend_data */ + }; |