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https://github.com/darlinghq/darling-gdb.git
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353 lines
9.2 KiB
C
353 lines
9.2 KiB
C
/* IBM RS/6000 "XCOFF" back-end for BFD.
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Copyright 2001, 2002, 2003, 2004, 2005
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Free Software Foundation, Inc.
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Written by Tom Rix
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Contributed by Red Hat Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "bfd.h"
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#ifdef AIX_5_CORE
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#include "sysdep.h"
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#include "libbfd.h"
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const bfd_target *xcoff64_core_p (bfd *);
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bfd_boolean xcoff64_core_file_matches_executable_p (bfd *, bfd *);
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char *xcoff64_core_file_failing_command (bfd *);
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int xcoff64_core_file_failing_signal (bfd *);
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/* Aix 5.1 system include file. */
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/* Need to define this macro so struct ld_info64 get included. */
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#define __LDINFO_PTRACE64__
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#include <sys/ldr.h>
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#include <core.h>
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#define core_hdr(abfd) ((struct core_dumpxx *) abfd->tdata.any)
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#define CHECK_FILE_OFFSET(s, v) \
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((bfd_signed_vma)(v) < 0 || (bfd_signed_vma)(v) > (bfd_signed_vma)(s).st_size)
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const bfd_target *
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xcoff64_core_p (bfd *abfd)
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{
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struct core_dumpxx core, *new_core_hdr;
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struct stat statbuf;
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asection *sec;
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struct __ld_info64 ldinfo;
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bfd_vma ld_offset;
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bfd_size_type i;
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struct vm_infox vminfo;
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const bfd_target *return_value = NULL;
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/* Get the header. */
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if (bfd_seek (abfd, 0, SEEK_SET) != 0)
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goto xcoff64_core_p_error;
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if (sizeof (struct core_dumpxx)
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!= bfd_bread (&core, sizeof (struct core_dumpxx), abfd))
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goto xcoff64_core_p_error;
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if (bfd_stat (abfd, &statbuf) < 0)
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goto xcoff64_core_p_error;
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/* Sanity checks
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c_flag has CORE_VERSION_1, Aix 4+
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c_entries = 0 for Aix 4.3+
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IS_PROC64 is a macro defined in procinfo.h, test for 64 bit process.
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We will still be confused if a Aix 4.3 64 bit core file is
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copied over to a Aix 5 machine.
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Check file header offsets
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See rs6000-core.c for comment on size of core
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If there isn't enough of a real core file, bail. */
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if ((CORE_VERSION_1 != (core.c_flag & CORE_VERSION_1))
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|| (0 != core.c_entries)
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|| (! (IS_PROC64 (&core.c_u.U_proc)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_fdsinfox)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_loader)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_loader + core.c_lsize)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_thr)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_segregion)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_stack)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_stack + core.c_size)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_data)))
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|| ((CHECK_FILE_OFFSET (statbuf, core.c_data + core.c_datasize)))
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|| (! (core.c_flag & UBLOCK_VALID))
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|| (! (core.c_flag & LE_VALID)))
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goto xcoff64_core_p_error;
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/* Check for truncated stack or general truncating. */
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if ((! (core.c_flag & USTACK_VALID))
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|| (core.c_flag & CORE_TRUNC))
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{
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bfd_set_error (bfd_error_file_truncated);
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return return_value;
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}
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new_core_hdr = bfd_zalloc (abfd, sizeof (struct core_dumpxx));
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if (NULL == new_core_hdr)
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return return_value;
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memcpy (new_core_hdr, &core, sizeof (struct core_dumpxx));
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/* The core_hdr() macro is no longer used here because it would
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expand to code relying on gcc's cast-as-lvalue extension,
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which was removed in gcc 4.0. */
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abfd->tdata.any = new_core_hdr;
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/* .stack section. */
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sec = bfd_make_section_anyway (abfd, ".stack");
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if (NULL == sec)
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return return_value;
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sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
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sec->size = core.c_size;
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sec->vma = core.c_stackorg;
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sec->filepos = core.c_stack;
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/* .reg section for all registers. */
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sec = bfd_make_section_anyway (abfd, ".reg");
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if (NULL == sec)
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return return_value;
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sec->flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY;
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sec->size = sizeof (struct __context64);
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sec->vma = 0;
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sec->filepos = 0;
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sec->contents = (bfd_byte *)&new_core_hdr->c_flt.r64;
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/* .ldinfo section.
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To actually find out how long this section is in this particular
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core dump would require going down the whole list of struct
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ld_info's. See if we can just fake it. */
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sec = bfd_make_section_anyway (abfd, ".ldinfo");
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if (NULL == sec)
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return return_value;
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sec->flags = SEC_HAS_CONTENTS;
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sec->size = core.c_lsize;
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sec->vma = 0;
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sec->filepos = core.c_loader;
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/* AIX 4 adds data sections from loaded objects to the core file,
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which can be found by examining ldinfo, and anonymously mmapped
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regions. */
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/* .data section from executable. */
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sec = bfd_make_section_anyway (abfd, ".data");
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if (NULL == sec)
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return return_value;
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sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
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sec->size = core.c_datasize;
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sec->vma = core.c_dataorg;
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sec->filepos = core.c_data;
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/* .data sections from loaded objects. */
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ld_offset = core.c_loader;
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while (1)
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{
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if (bfd_seek (abfd, ld_offset, SEEK_SET) != 0)
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return return_value;
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if (sizeof (struct __ld_info64) !=
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bfd_bread (&ldinfo, sizeof (struct __ld_info64), abfd))
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return return_value;
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if (ldinfo.ldinfo_core)
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{
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sec = bfd_make_section_anyway (abfd, ".data");
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if (NULL == sec)
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return return_value;
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sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
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sec->size = ldinfo.ldinfo_datasize;
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sec->vma = ldinfo.ldinfo_dataorg;
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sec->filepos = ldinfo.ldinfo_core;
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}
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if (0 == ldinfo.ldinfo_next)
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break;
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ld_offset += ldinfo.ldinfo_next;
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}
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/* .vmdata sections from anonymously mmapped regions. */
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if (core.c_vmregions)
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{
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if (bfd_seek (abfd, core.c_vmm, SEEK_SET) != 0)
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return return_value;
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for (i = 0; i < core.c_vmregions; i++)
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if (sizeof (struct vm_infox) !=
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bfd_bread (&vminfo, sizeof (struct vm_infox), abfd))
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return return_value;
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if (vminfo.vminfo_offset)
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{
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sec = bfd_make_section_anyway (abfd, ".vmdata");
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if (NULL == sec)
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return return_value;
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sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
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sec->size = vminfo.vminfo_size;
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sec->vma = vminfo.vminfo_addr;
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sec->filepos = vminfo.vminfo_offset;
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}
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}
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return_value = (bfd_target *) abfd->xvec; /* This is garbage for now. */
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xcoff64_core_p_error:
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return return_value;
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}
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/* Return `TRUE' if given core is from the given executable. */
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bfd_boolean
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xcoff64_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
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{
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struct core_dumpxx core;
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char *path, *s;
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size_t alloc;
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const char *str1, *str2;
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bfd_boolean return_value = FALSE;
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/* Get the header. */
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if (bfd_seek (core_bfd, 0, SEEK_SET) != 0)
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return return_value;
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if (sizeof (struct core_dumpxx) !=
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bfd_bread (&core, sizeof (struct core_dumpxx), core_bfd))
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return return_value;
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if (bfd_seek (core_bfd, core.c_loader, SEEK_SET) != 0)
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return return_value;
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alloc = 100;
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path = bfd_malloc (alloc);
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if (path == NULL)
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return return_value;
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s = path;
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while (1)
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{
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if (bfd_bread (s, 1, core_bfd) != 1)
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goto xcoff64_core_file_matches_executable_p_end_1;
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if (*s == '\0')
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break;
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++s;
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if (s == path + alloc)
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{
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char *n;
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alloc *= 2;
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n = bfd_realloc (path, alloc);
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if (n == NULL)
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goto xcoff64_core_file_matches_executable_p_end_1;
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s = n + (path - s);
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path = n;
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}
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}
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str1 = strrchr (path, '/');
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str2 = strrchr (exec_bfd->filename, '/');
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/* Step over character '/'. */
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str1 = str1 != NULL ? str1 + 1 : path;
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str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename;
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if (strcmp (str1, str2) == 0)
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return_value = TRUE;
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xcoff64_core_file_matches_executable_p_end_1:
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free (path);
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return return_value;
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}
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char *
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xcoff64_core_file_failing_command (bfd *abfd)
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{
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struct core_dumpxx *c = core_hdr (abfd);
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char *return_value = 0;
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if (NULL != c)
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return_value = c->c_u.U_proc.pi_comm;
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return return_value;
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}
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int
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xcoff64_core_file_failing_signal (bfd *abfd)
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{
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struct core_dumpxx *c = core_hdr (abfd);
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int return_value = 0;
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if (NULL != c)
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return_value = c->c_signo;
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return return_value;
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}
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#else /* AIX_5_CORE */
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const bfd_target *xcoff64_core_p (bfd *);
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bfd_boolean xcoff64_core_file_matches_executable_p (bfd *, bfd *);
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char *xcoff64_core_file_failing_command (bfd *);
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int xcoff64_core_file_failing_signal (bfd *);
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const bfd_target *
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xcoff64_core_p (bfd *abfd ATTRIBUTE_UNUSED)
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{
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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bfd_boolean
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xcoff64_core_file_matches_executable_p (bfd *core_bfd ATTRIBUTE_UNUSED,
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bfd *exec_bfd ATTRIBUTE_UNUSED)
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{
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return FALSE;
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}
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char *
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xcoff64_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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int
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xcoff64_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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#endif /* AIX_5_CORE */
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