blob: 179a7bf5b785c2d134af410eb68b523ee0bcdd08 [file] [log] [blame]
/* IBM RS/6000 "XCOFF" back-end for BFD.
Copyright (C) 2001-2024 Free Software Foundation, Inc.
Written by Tom Rix
Contributed by Red Hat Inc.
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. */
#include "sysdep.h"
#include "bfd.h"
bfd_cleanup xcoff64_core_p (bfd *);
bool xcoff64_core_file_matches_executable_p (bfd *, bfd *);
char *xcoff64_core_file_failing_command (bfd *);
int xcoff64_core_file_failing_signal (bfd *);
#ifdef AIX_5_CORE
#include "libbfd.h"
/* Aix 5.1 system include file. */
/* Need to define this macro so struct ld_info64 get included. */
#define __LDINFO_PTRACE64__
#include <sys/ldr.h>
#include <core.h>
/* The default architecture and machine for matching core files. */
#define DEFAULT_ARCHITECTURE bfd_arch_powerpc
#define DEFAULT_MACHINE bfd_mach_ppc_620
#define core_hdr(abfd) ((struct core_dumpxx *) abfd->tdata.any)
#define CHECK_FILE_OFFSET(s, v) \
((bfd_signed_vma)(v) < 0 || (bfd_signed_vma)(v) > (bfd_signed_vma)(s).st_size)
bfd_cleanup
xcoff64_core_p (bfd *abfd)
{
enum bfd_architecture arch;
unsigned long mach;
struct core_dumpxx core, *new_core_hdr;
struct stat statbuf;
asection *sec;
struct __ld_info64 ldinfo;
bfd_vma ld_offset;
bfd_size_type i;
struct vm_infox vminfo;
flagword flags;
/* Get the header. */
if (bfd_seek (abfd, 0, SEEK_SET) != 0)
goto xcoff64_core_p_error;
if (sizeof (struct core_dumpxx)
!= bfd_read (&core, sizeof (struct core_dumpxx), abfd))
goto xcoff64_core_p_error;
if (bfd_stat (abfd, &statbuf) < 0)
goto xcoff64_core_p_error;
/* Sanity checks
c_flag has CORE_VERSION_1, Aix 4+
c_entries = 0 for Aix 4.3+
IS_PROC64 is a macro defined in procinfo.h, test for 64 bit process.
We will still be confused if a Aix 4.3 64 bit core file is
copied over to a Aix 5 machine.
Check file header offsets
See rs6000-core.c for comment on size of core
If there isn't enough of a real core file, bail. */
if ((CORE_VERSION_1 != (core.c_flag & CORE_VERSION_1))
|| (0 != core.c_entries)
|| (! (IS_PROC64 (&core.c_u.U_proc)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_fdsinfox)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_loader)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_loader + core.c_lsize)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_thr)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_segregion)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_stack)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_stack + core.c_size)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_data)))
|| ((CHECK_FILE_OFFSET (statbuf, core.c_data + core.c_datasize)))
|| (! (core.c_flag & UBLOCK_VALID))
|| (! (core.c_flag & LE_VALID)))
goto xcoff64_core_p_error;
/* Check for truncated stack or general truncating. */
if ((! (core.c_flag & USTACK_VALID))
|| (core.c_flag & CORE_TRUNC))
{
bfd_set_error (bfd_error_file_truncated);
return NULL;
}
new_core_hdr = bfd_zalloc (abfd, sizeof (struct core_dumpxx));
if (NULL == new_core_hdr)
return NULL;
memcpy (new_core_hdr, &core, sizeof (struct core_dumpxx));
/* The core_hdr() macro is no longer used here because it would
expand to code relying on gcc's cast-as-lvalue extension,
which was removed in gcc 4.0. */
abfd->tdata.any = new_core_hdr;
/* .stack section. */
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
sec = bfd_make_section_anyway_with_flags (abfd, ".stack", flags);
if (NULL == sec)
return NULL;
sec->size = core.c_size;
sec->vma = core.c_stackorg;
sec->filepos = core.c_stack;
/* .reg section for all registers. */
flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY;
sec = bfd_make_section_anyway_with_flags (abfd, ".reg", flags);
if (NULL == sec)
return NULL;
sec->size = sizeof (struct __context64);
sec->vma = 0;
sec->filepos = 0;
sec->contents = (bfd_byte *)&new_core_hdr->c_flt.r64;
if (core.c_extctx)
{
/* vmx section. */
flags = SEC_HAS_CONTENTS;
sec = bfd_make_section_anyway_with_flags (abfd, ".aix-vmx", flags);
if (sec == NULL)
return NULL;
sec->size = 560;
sec->vma = 0;
sec->filepos = core.c_extctx;
/* vmx section. */
flags = SEC_HAS_CONTENTS;
sec = bfd_make_section_anyway_with_flags (abfd, ".aix-vsx", flags);
if (sec == NULL)
return NULL;
sec->size = 256;
sec->vma = 0;
sec->filepos = core.c_extctx + 584;
}
/* .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. */
flags = SEC_HAS_CONTENTS;
sec = bfd_make_section_anyway_with_flags (abfd, ".ldinfo", flags);
if (NULL == sec)
return NULL;
sec->size = core.c_lsize;
sec->vma = 0;
sec->filepos = core.c_loader;
/* AIX 4 adds data sections from loaded objects to the core file,
which can be found by examining ldinfo, and anonymously mmapped
regions. */
/* .data section from executable. */
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
sec = bfd_make_section_anyway_with_flags (abfd, ".data", flags);
if (NULL == sec)
return NULL;
sec->size = core.c_datasize;
sec->vma = core.c_dataorg;
sec->filepos = core.c_data;
/* .data sections from loaded objects. */
ld_offset = core.c_loader;
while (1)
{
if (bfd_seek (abfd, ld_offset, SEEK_SET) != 0)
return NULL;
if (sizeof (struct __ld_info64) !=
bfd_read (&ldinfo, sizeof (struct __ld_info64), abfd))
return NULL;
if (ldinfo.ldinfo_core)
{
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
sec = bfd_make_section_anyway_with_flags (abfd, ".data", flags);
if (NULL == sec)
return NULL;
sec->size = ldinfo.ldinfo_datasize;
sec->vma = ldinfo.ldinfo_dataorg;
sec->filepos = ldinfo.ldinfo_core;
}
if (0 == ldinfo.ldinfo_next)
break;
ld_offset += ldinfo.ldinfo_next;
}
/* .vmdata sections from anonymously mmapped regions. */
if (core.c_vmregions)
{
if (bfd_seek (abfd, core.c_vmm, SEEK_SET) != 0)
return NULL;
for (i = 0; i < core.c_vmregions; i++)
if (sizeof (struct vm_infox) !=
bfd_read (&vminfo, sizeof (struct vm_infox), abfd))
return NULL;
if (vminfo.vminfo_offset)
{
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
sec = bfd_make_section_anyway_with_flags (abfd, ".vmdata", flags);
if (NULL == sec)
return NULL;
sec->size = vminfo.vminfo_size;
sec->vma = vminfo.vminfo_addr;
sec->filepos = vminfo.vminfo_offset;
}
}
/* Set the architecture and machine. */
arch = DEFAULT_ARCHITECTURE;
mach = DEFAULT_MACHINE;
bfd_default_set_arch_mach (abfd, arch, mach);
return _bfd_no_cleanup;
xcoff64_core_p_error:
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
/* Return `TRUE' if given core is from the given executable. */
bool
xcoff64_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
{
struct core_dumpxx core;
char *path, *s;
size_t alloc;
const char *str1, *str2;
bool return_value = false;
/* Get the header. */
if (bfd_seek (core_bfd, 0, SEEK_SET) != 0)
return return_value;
if (sizeof (struct core_dumpxx) !=
bfd_read (&core, sizeof (struct core_dumpxx), core_bfd))
return return_value;
if (bfd_seek (core_bfd, core.c_loader, SEEK_SET) != 0)
return return_value;
alloc = 100;
path = bfd_malloc (alloc);
if (path == NULL)
return return_value;
s = path;
while (1)
{
if (bfd_read (s, 1, core_bfd) != 1)
goto xcoff64_core_file_matches_executable_p_end_1;
if (*s == '\0')
break;
++s;
if (s == path + alloc)
{
char *n;
alloc *= 2;
n = bfd_realloc (path, alloc);
if (n == NULL)
goto xcoff64_core_file_matches_executable_p_end_1;
s = n + (path - s);
path = n;
}
}
str1 = strrchr (path, '/');
str2 = strrchr (bfd_get_filename (exec_bfd), '/');
/* Step over character '/'. */
str1 = str1 != NULL ? str1 + 1 : path;
str2 = str2 != NULL ? str2 + 1 : bfd_get_filename (exec_bfd);
if (strcmp (str1, str2) == 0)
return_value = true;
xcoff64_core_file_matches_executable_p_end_1:
free (path);
return return_value;
}
char *
xcoff64_core_file_failing_command (bfd *abfd)
{
struct core_dumpxx *c = core_hdr (abfd);
char *return_value = 0;
if (NULL != c)
return_value = c->c_u.U_proc.pi_comm;
return return_value;
}
int
xcoff64_core_file_failing_signal (bfd *abfd)
{
struct core_dumpxx *c = core_hdr (abfd);
int return_value = 0;
if (NULL != c)
return_value = c->c_signo;
return return_value;
}
#else /* AIX_5_CORE */
bfd_cleanup
xcoff64_core_p (bfd *abfd ATTRIBUTE_UNUSED)
{
bfd_set_error (bfd_error_wrong_format);
return 0;
}
bool
xcoff64_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
{
return generic_core_file_matches_executable_p (core_bfd, exec_bfd);
}
char *
xcoff64_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
{
return 0;
}
int
xcoff64_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
{
return 0;
}
#endif /* AIX_5_CORE */