old-cross-binutils/bfd/rs6000-core.c
Pedro Alves c38e85596e AIX 32-bit core loading, high section addresses.
I noticed GDB was failing to enable threading support for 32-bit AIX
cores.  I traced it to failure to read variables from libpthreads.a.
The issue is that data for that library is loaded at a high address,
and bfd is sign extending the section addresses:

 (gdb) info files
 Symbols from "/home/palves/crash".
 Local core dump file:
	 `/home/palves/core', file type aixcoff-rs6000.
	 0x2ff22000 - 0x2ff23000 is .stack
	 0x20000000 - 0x200316e0 is .data
	 0x20000e90 - 0x200016c0 is .data
	 0xfffffffff0254000 - 0xfffffffff0297920 is .data
	 0xfffffffff07b46a8 - 0xfffffffff07b47c8 is .data
	 0xfffffffff0298000 - 0xfffffffff029bfcc is .data
	 0xfffffffff06dafe0 - 0xfffffffff07b3838 is .data
 Local exec file:
	 `/home/palves/crash', file type aixcoff-rs6000.
	 Entry point: 0x20001394
	 0x10000150 - 0x10000e90 is .text
	 0x20000e90 - 0x2000149c is .data
	 0x2000149c - 0x200016c0 is .bss
	 0xd053b124 - 0xd053e15f is .text in /usr/lib/libpthreads.a(shr_comm.o)
	 0xf0254000 - 0xf0297920 is .data in /usr/lib/libpthreads.a(shr_comm.o)
	 0xf0254450 - 0xf0297920 is .bss in /usr/lib/libpthreads.a(shr_comm.o)
	 0xd053a280 - 0xd053aabe is .text in /usr/lib/libcrypt.a(shr.o)
	 0xf07b46a8 - 0xf07b47c8 is .data in /usr/lib/libcrypt.a(shr.o)
	 0xf07b47c8 - 0xf07b47c8 is .bss in /usr/lib/libcrypt.a(shr.o)
	 0xd04fb180 - 0xd053917e is .text in /usr/lib/libpthreads.a(shr_xpg5.o)
	 0xf0298000 - 0xf029bfcc is .data in /usr/lib/libpthreads.a(shr_xpg5.o)
	 0xf029bf64 - 0xf029bfcc is .bss in /usr/lib/libpthreads.a(shr_xpg5.o)
	 0xd0100900 - 0xd04fa39c is .text in /usr/lib/libc.a(shr.o)
	 0xf06dafe0 - 0xf07b3838 is .data in /usr/lib/libc.a(shr.o)
	 0xf0751e94 - 0xf07b3838 is .bss in /usr/lib/libc.a(shr.o)

Notice:
	...
	0xfffffffff0298000 - 0xfffffffff029bfcc is .data
	...

Those are the bfd section start/end addresses.  It't not visible here:

         ...
	 0xf0298000 - 0xf029bfcc is .data in /usr/lib/libpthreads.a(shr_xpg5.o)
         ...

... just because GDB trims that number to 32-bit when printing.

GDB then fails to find the memory for libpthreads.a variables in the
core, and falls back to reading it directly from the executable (which
yields the values as originally initialized in the code).

E.g.:

 (gdb) p &__n_pthreads
 $2 = (<data variable, no debug info> *) 0xf074fda8 <__n_pthreads>
 (gdb) p __n_pthreads
 $1 = -1

That should have returned 2 instead of -1.

bfd/
2014-03-07  Pedro Alves  <palves@redhat.com>

	* rs6000-core.c (rs6000coff_core_p): Cast pointers to bfd_vma
	through ptr_to_uint instead of through long.
2014-03-07 12:11:40 +00:00

751 lines
20 KiB
C

/* IBM RS/6000 "XCOFF" back-end for BFD.
Copyright (C) 1990-2014 Free Software Foundation, Inc.
Written by Metin G. Ozisik, Mimi Phuong-Thao Vo, and John Gilmore.
Archive support from Damon A. Permezel.
Contributed by IBM Corporation and 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 port currently only handles reading object files, except when
compiled on an RS/6000 host. -- no archive support, no core files.
In all cases, it does not support writing.
This is in a separate file from coff-rs6000.c, because it includes
system include files that conflict with coff/rs6000.h. */
/* Internalcoff.h and coffcode.h modify themselves based on this flag. */
#define RS6000COFF_C 1
/* The AIX 4.1 kernel is obviously compiled with -D_LONG_LONG, so
we have to define _LONG_LONG for older versions of gcc to get the
proper alignments in the user structure. */
#if defined(_AIX41) && !defined(_LONG_LONG)
#define _LONG_LONG
#endif
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#ifdef AIX_CORE
/* AOUTHDR is defined by the above. We need another defn of it, from the
system include files. Punt the old one and get us a new name for the
typedef in the system include files. */
#ifdef AOUTHDR
#undef AOUTHDR
#endif
#define AOUTHDR second_AOUTHDR
#undef SCNHDR
/* ------------------------------------------------------------------------ */
/* Support for core file stuff.. */
/* ------------------------------------------------------------------------ */
#include <sys/user.h>
#define __LDINFO_PTRACE32__ /* for __ld_info32 */
#define __LDINFO_PTRACE64__ /* for __ld_info64 */
#include <sys/ldr.h>
#include <sys/core.h>
#include <sys/systemcfg.h>
/* Borrowed from <sys/inttypes.h> on recent AIX versions. */
typedef unsigned long ptr_to_uint;
#define core_hdr(bfd) ((CoreHdr *) bfd->tdata.any)
/* AIX 4.1 changed the names and locations of a few items in the core file.
AIX 4.3 defined an entirely new structure, core_dumpx, but kept support for
the previous 4.1 structure, core_dump.
AIX_CORE_DUMPX_CORE is defined (by configure) on AIX 4.3+, and
CORE_VERSION_1 is defined (by AIX core.h) as 2 on AIX 4.3+ and as 1 on AIX
4.1 and 4.2. AIX pre-4.1 (aka 3.x) either doesn't define CORE_VERSION_1
or else defines it as 0. */
#if defined(CORE_VERSION_1) && !CORE_VERSION_1
# undef CORE_VERSION_1
#endif
/* The following union and macros allow this module to compile on all AIX
versions and to handle both core_dumpx and core_dump on 4.3+. CNEW_*()
and COLD_*() macros respectively retrieve core_dumpx and core_dump
values. */
/* Union of 32-bit and 64-bit versions of ld_info. */
typedef union {
#ifdef __ld_info32
struct __ld_info32 l32;
struct __ld_info64 l64;
#else
struct ld_info l32;
struct ld_info l64;
#endif
} LdInfo;
/* Union of old and new core dump structures. */
typedef union {
#ifdef AIX_CORE_DUMPX_CORE
struct core_dumpx new_dump; /* new AIX 4.3+ core dump */
#else
struct core_dump new_dump; /* for simpler coding */
#endif
struct core_dump old; /* old AIX 4.2- core dump, still used on
4.3+ with appropriate SMIT config */
} CoreHdr;
/* Union of old and new vm_info structures. */
#ifdef CORE_VERSION_1
typedef union {
#ifdef AIX_CORE_DUMPX_CORE
struct vm_infox new_dump;
#else
struct vm_info new_dump;
#endif
struct vm_info old;
} VmInfo;
#endif
/* Return whether CoreHdr C is in new or old format. */
#ifdef AIX_CORE_DUMPX_CORE
# define CORE_NEW(c) (!(c).old.c_entries)
#else
# define CORE_NEW(c) 0
#endif
/* Return whether CoreHdr C usese core_dumpxx structure.
FIXME: the core file format version number used here definitely indicates
that struct core_dumpxx should be used to represent the core file header,
but that may not be the only such format version number. */
#ifdef AIX_5_CORE
# define CORE_DUMPXX_VERSION 267312562
# define CNEW_IS_CORE_DUMPXX(c) ((c).new_dump.c_version == CORE_DUMPXX_VERSION)
#else
# define CNEW_IS_CORE_DUMPXX(c) 0
#endif
/* Return the c_stackorg field from struct core_dumpx C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_STACKORG(c) (c).c_stackorg
#else
# define CNEW_STACKORG(c) 0
#endif
/* Return the offset to the loader region from struct core_dump C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_LOADER(c) (c).c_loader
#else
# define CNEW_LOADER(c) 0
#endif
/* Return the offset to the loader region from struct core_dump C. */
#define COLD_LOADER(c) (c).c_tab
/* Return the c_lsize field from struct core_dumpx C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_LSIZE(c) (c).c_lsize
#else
# define CNEW_LSIZE(c) 0
#endif
/* Return the c_dataorg field from struct core_dumpx C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_DATAORG(c) (c).c_dataorg
#else
# define CNEW_DATAORG(c) 0
#endif
/* Return the c_datasize field from struct core_dumpx C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_DATASIZE(c) (c).c_datasize
#else
# define CNEW_DATASIZE(c) 0
#endif
/* Return the c_impl field from struct core_dumpx C. */
#if defined (HAVE_ST_C_IMPL) || defined (AIX_5_CORE)
# define CNEW_IMPL(c) (c).c_impl
#else
# define CNEW_IMPL(c) 0
#endif
/* Return the command string from struct core_dumpx C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_COMM(c) (c).c_u.U_proc.pi_comm
#else
# define CNEW_COMM(c) 0
#endif
/* Return the command string from struct core_dump C. */
#ifdef CORE_VERSION_1
# define COLD_COMM(c) (c).c_u.U_comm
#else
# define COLD_COMM(c) (c).c_u.u_comm
#endif
/* Return the struct __context64 pointer from struct core_dumpx C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_CONTEXT64(c) (c).c_flt.hctx.r64
#else
# define CNEW_CONTEXT64(c) c
#endif
/* Return the struct mstsave pointer from struct core_dumpx C. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_MSTSAVE(c) (c).c_flt.hctx.r32
#else
# define CNEW_MSTSAVE(c) c
#endif
/* Return the struct mstsave pointer from struct core_dump C. */
#ifdef CORE_VERSION_1
# define COLD_MSTSAVE(c) (c).c_mst
#else
# define COLD_MSTSAVE(c) (c).c_u.u_save
#endif
/* Return whether struct core_dumpx is from a 64-bit process. */
#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_PROC64(c) IS_PROC64(&(c).c_u.U_proc)
#else
# define CNEW_PROC64(c) 0
#endif
/* Magic end-of-stack addresses for old core dumps. This is _very_ fragile,
but I don't see any easy way to get that info right now. */
#ifdef CORE_VERSION_1
# define COLD_STACKEND 0x2ff23000
#else
# define COLD_STACKEND 0x2ff80000
#endif
/* Size of the leading portion that old and new core dump structures have in
common. */
#define CORE_COMMONSZ ((int) &((struct core_dump *) 0)->c_entries \
+ sizeof (((struct core_dump *) 0)->c_entries))
/* Define prototypes for certain functions, to avoid a compiler warning
saying that they are missing. */
const bfd_target * rs6000coff_core_p (bfd *abfd);
bfd_boolean rs6000coff_core_file_matches_executable_p (bfd *core_bfd,
bfd *exec_bfd);
char * rs6000coff_core_file_failing_command (bfd *abfd);
int rs6000coff_core_file_failing_signal (bfd *abfd);
/* Try to read into CORE the header from the core file associated with ABFD.
Return success. */
static bfd_boolean
read_hdr (bfd *abfd, CoreHdr *core)
{
bfd_size_type size;
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
return FALSE;
/* Read the leading portion that old and new core dump structures have in
common. */
size = CORE_COMMONSZ;
if (bfd_bread (core, size, abfd) != size)
return FALSE;
/* Read the trailing portion of the structure. */
if (CORE_NEW (*core))
size = sizeof (core->new_dump);
else
size = sizeof (core->old);
size -= CORE_COMMONSZ;
return bfd_bread ((char *) core + CORE_COMMONSZ, size, abfd) == size;
}
static asection *
make_bfd_asection (bfd *abfd, const char *name, flagword flags,
bfd_size_type size, bfd_vma vma, file_ptr filepos)
{
asection *asect;
asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
if (!asect)
return NULL;
asect->size = size;
asect->vma = vma;
asect->filepos = filepos;
asect->alignment_power = 8;
return asect;
}
/* Decide if a given bfd represents a `core' file or not. There really is no
magic number or anything like, in rs6000coff. */
const bfd_target *
rs6000coff_core_p (bfd *abfd)
{
CoreHdr core;
struct stat statbuf;
bfd_size_type size;
char *tmpptr;
/* Values from new and old core structures. */
int c_flag;
file_ptr c_stack, c_regoff, c_loader;
bfd_size_type c_size, c_regsize, c_lsize;
bfd_vma c_stackend;
void *c_regptr;
int proc64;
if (!read_hdr (abfd, &core))
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
/* This isn't the right handler for 64-bit core files on AIX 5.x. */
if (CORE_NEW (core) && CNEW_IS_CORE_DUMPXX (core))
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
/* Copy fields from new or old core structure. */
if (CORE_NEW (core))
{
c_flag = core.new_dump.c_flag;
c_stack = (file_ptr) core.new_dump.c_stack;
c_size = core.new_dump.c_size;
c_stackend = CNEW_STACKORG (core.new_dump) + c_size;
c_lsize = CNEW_LSIZE (core.new_dump);
c_loader = CNEW_LOADER (core.new_dump);
proc64 = CNEW_PROC64 (core.new_dump);
}
else
{
c_flag = core.old.c_flag;
c_stack = (file_ptr) (ptr_to_uint) core.old.c_stack;
c_size = core.old.c_size;
c_stackend = COLD_STACKEND;
c_lsize = 0x7ffffff;
c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
proc64 = 0;
}
if (proc64)
{
c_regsize = sizeof (CNEW_CONTEXT64 (core.new_dump));
c_regptr = &CNEW_CONTEXT64 (core.new_dump);
}
else if (CORE_NEW (core))
{
c_regsize = sizeof (CNEW_MSTSAVE (core.new_dump));
c_regptr = &CNEW_MSTSAVE (core.new_dump);
}
else
{
c_regsize = sizeof (COLD_MSTSAVE (core.old));
c_regptr = &COLD_MSTSAVE (core.old);
}
c_regoff = (char *) c_regptr - (char *) &core;
if (bfd_stat (abfd, &statbuf) < 0)
{
bfd_set_error (bfd_error_system_call);
return NULL;
}
/* If the core file ulimit is too small, the system will first
omit the data segment, then omit the stack, then decline to
dump core altogether (as far as I know UBLOCK_VALID and LE_VALID
are always set) (this is based on experimentation on AIX 3.2).
Now, the thing is that GDB users will be surprised
if segments just silently don't appear (well, maybe they would
think to check "info files", I don't know).
For the data segment, we have no choice but to keep going if it's
not there, since the default behavior is not to dump it (regardless
of the ulimit, it's based on SA_FULLDUMP). But for the stack segment,
if it's not there, we refuse to have anything to do with this core
file. The usefulness of a core dump without a stack segment is pretty
limited anyway. */
if (!(c_flag & UBLOCK_VALID)
|| !(c_flag & LE_VALID))
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
if (!(c_flag & USTACK_VALID))
{
bfd_set_error (bfd_error_file_truncated);
return NULL;
}
/* Don't check the core file size for a full core, AIX 4.1 includes
additional shared library sections in a full core. */
if (!(c_flag & (FULL_CORE | CORE_TRUNC)))
{
/* If the size is wrong, it means we're misinterpreting something. */
if (c_stack + (file_ptr) c_size != statbuf.st_size)
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
}
/* Sanity check on the c_tab field. */
if (!CORE_NEW (core) && (c_loader < (file_ptr) sizeof core.old ||
c_loader >= statbuf.st_size ||
c_loader >= c_stack))
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
/* Issue warning if the core file was truncated during writing. */
if (c_flag & CORE_TRUNC)
(*_bfd_error_handler) (_("%s: warning core file truncated"),
bfd_get_filename (abfd));
/* Allocate core file header. */
size = CORE_NEW (core) ? sizeof (core.new_dump) : sizeof (core.old);
tmpptr = (char *) bfd_zalloc (abfd, (bfd_size_type) size);
if (!tmpptr)
return NULL;
/* Copy core file header. */
memcpy (tmpptr, &core, size);
set_tdata (abfd, tmpptr);
/* Set architecture. */
if (CORE_NEW (core))
{
enum bfd_architecture arch;
unsigned long mach;
switch (CNEW_IMPL (core.new_dump))
{
case POWER_RS1:
case POWER_RSC:
case POWER_RS2:
arch = bfd_arch_rs6000;
mach = bfd_mach_rs6k;
break;
default:
arch = bfd_arch_powerpc;
mach = bfd_mach_ppc;
break;
}
bfd_default_set_arch_mach (abfd, arch, mach);
}
/* .stack section. */
if (!make_bfd_asection (abfd, ".stack",
SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
c_size, c_stackend - c_size, c_stack))
goto fail;
/* .reg section for all registers. */
if (!make_bfd_asection (abfd, ".reg",
SEC_HAS_CONTENTS,
c_regsize, (bfd_vma) 0, c_regoff))
goto fail;
/* .ldinfo section.
To actually find out how long this section is in this particular
core dump would require going down the whole list of struct ld_info's.
See if we can just fake it. */
if (!make_bfd_asection (abfd, ".ldinfo",
SEC_HAS_CONTENTS,
c_lsize, (bfd_vma) 0, c_loader))
goto fail;
#ifndef CORE_VERSION_1
/* .data section if present.
AIX 3 dumps the complete data section and sets FULL_CORE if the
ulimit is large enough, otherwise the data section is omitted.
AIX 4 sets FULL_CORE even if the core file is truncated, we have
to examine core.c_datasize below to find out the actual size of
the .data section. */
if (c_flag & FULL_CORE)
{
if (!make_bfd_asection (abfd, ".data",
SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
(bfd_size_type) core.old.c_u.u_dsize,
(bfd_vma)
CDATA_ADDR (core.old.c_u.u_dsize),
c_stack + c_size))
goto fail;
}
#endif
#ifdef CORE_VERSION_1
/* AIX 4 adds data sections from loaded objects to the core file,
which can be found by examining ldinfo, and anonymously mmapped
regions. */
{
LdInfo ldinfo;
bfd_size_type ldi_datasize;
file_ptr ldi_core;
uint ldi_next;
bfd_vma ldi_dataorg;
/* Fields from new and old core structures. */
bfd_size_type c_datasize, c_vmregions;
file_ptr c_data, c_vmm;
if (CORE_NEW (core))
{
c_datasize = CNEW_DATASIZE (core.new_dump);
c_data = (file_ptr) core.new_dump.c_data;
c_vmregions = core.new_dump.c_vmregions;
c_vmm = (file_ptr) core.new_dump.c_vmm;
}
else
{
c_datasize = core.old.c_datasize;
c_data = (file_ptr) (ptr_to_uint) core.old.c_data;
c_vmregions = core.old.c_vmregions;
c_vmm = (file_ptr) (ptr_to_uint) core.old.c_vmm;
}
/* .data section from executable. */
if (c_datasize)
{
if (!make_bfd_asection (abfd, ".data",
SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
c_datasize,
(bfd_vma) CDATA_ADDR (c_datasize),
c_data))
goto fail;
}
/* .data sections from loaded objects. */
if (proc64)
size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
else
size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
while (1)
{
if (bfd_seek (abfd, c_loader, SEEK_SET) != 0)
goto fail;
if (bfd_bread (&ldinfo, size, abfd) != size)
goto fail;
if (proc64)
{
ldi_core = ldinfo.l64.ldinfo_core;
ldi_datasize = ldinfo.l64.ldinfo_datasize;
ldi_dataorg = (bfd_vma) ldinfo.l64.ldinfo_dataorg;
ldi_next = ldinfo.l64.ldinfo_next;
}
else
{
ldi_core = ldinfo.l32.ldinfo_core;
ldi_datasize = ldinfo.l32.ldinfo_datasize;
ldi_dataorg = (bfd_vma) (ptr_to_uint) ldinfo.l32.ldinfo_dataorg;
ldi_next = ldinfo.l32.ldinfo_next;
}
if (ldi_core)
if (!make_bfd_asection (abfd, ".data",
SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
ldi_datasize, ldi_dataorg, ldi_core))
goto fail;
if (ldi_next == 0)
break;
c_loader += ldi_next;
}
/* .vmdata sections from anonymously mmapped regions. */
if (c_vmregions)
{
bfd_size_type i;
if (bfd_seek (abfd, c_vmm, SEEK_SET) != 0)
goto fail;
for (i = 0; i < c_vmregions; i++)
{
VmInfo vminfo;
bfd_size_type vminfo_size;
file_ptr vminfo_offset;
bfd_vma vminfo_addr;
size = CORE_NEW (core) ? sizeof (vminfo.new_dump) : sizeof (vminfo.old);
if (bfd_bread (&vminfo, size, abfd) != size)
goto fail;
if (CORE_NEW (core))
{
vminfo_addr = (bfd_vma) vminfo.new_dump.vminfo_addr;
vminfo_size = vminfo.new_dump.vminfo_size;
vminfo_offset = vminfo.new_dump.vminfo_offset;
}
else
{
vminfo_addr = (bfd_vma) (ptr_to_uint) vminfo.old.vminfo_addr;
vminfo_size = vminfo.old.vminfo_size;
vminfo_offset = vminfo.old.vminfo_offset;
}
if (vminfo_offset)
if (!make_bfd_asection (abfd, ".vmdata",
SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
vminfo_size, vminfo_addr,
vminfo_offset))
goto fail;
}
}
}
#endif
return abfd->xvec; /* This is garbage for now. */
fail:
bfd_release (abfd, abfd->tdata.any);
abfd->tdata.any = NULL;
bfd_section_list_clear (abfd);
return NULL;
}
/* Return `TRUE' if given core is from the given executable. */
bfd_boolean
rs6000coff_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
{
CoreHdr core;
bfd_size_type size;
char *path, *s;
size_t alloc;
const char *str1, *str2;
bfd_boolean ret;
file_ptr c_loader;
if (!read_hdr (core_bfd, &core))
return FALSE;
if (CORE_NEW (core))
c_loader = CNEW_LOADER (core.new_dump);
else
c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
if (CORE_NEW (core) && CNEW_PROC64 (core.new_dump))
size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
else
size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
if (bfd_seek (core_bfd, c_loader + size, SEEK_SET) != 0)
return FALSE;
alloc = 100;
path = bfd_malloc ((bfd_size_type) alloc);
if (path == NULL)
return FALSE;
s = path;
while (1)
{
if (bfd_bread (s, (bfd_size_type) 1, core_bfd) != 1)
{
free (path);
return FALSE;
}
if (*s == '\0')
break;
++s;
if (s == path + alloc)
{
char *n;
alloc *= 2;
n = bfd_realloc (path, (bfd_size_type) alloc);
if (n == NULL)
{
free (path);
return FALSE;
}
s = n + (path - s);
path = n;
}
}
str1 = strrchr (path, '/');
str2 = strrchr (exec_bfd->filename, '/');
/* step over character '/' */
str1 = str1 != NULL ? str1 + 1 : path;
str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename;
if (strcmp (str1, str2) == 0)
ret = TRUE;
else
ret = FALSE;
free (path);
return ret;
}
char *
rs6000coff_core_file_failing_command (bfd *abfd)
{
CoreHdr *core = core_hdr (abfd);
char *com = CORE_NEW (*core) ?
CNEW_COMM (core->new_dump) : COLD_COMM (core->old);
if (*com)
return com;
else
return 0;
}
int
rs6000coff_core_file_failing_signal (bfd *abfd)
{
CoreHdr *core = core_hdr (abfd);
return CORE_NEW (*core) ? core->new_dump.c_signo : core->old.c_signo;
}
#endif /* AIX_CORE */