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- /* IBM RS/6000 "XCOFF" back-end for BFD.
- Copyright (C) 2001-2022 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_bread (&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;
- /* .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_bread (&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_bread (&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_bread (&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_bread (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 */
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