/* IBM RS/6000 "XCOFF" back-end for BFD.

   Copyright (C) 2001-2023 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 */