source: trunk/binutils/bfd/osf-core.c

/* BFD back-end for OSF/1 core files.
   Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002
   Free Software Foundation, 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* This file can only be compiled on systems which use OSF/1 style
   core files.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"

#include <sys/user.h>
#include <sys/core.h>

/* forward declarations */

static asection *make_bfd_asection
  PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr));
static const bfd_target *osf_core_core_file_p
  PARAMS ((bfd *));
static char *osf_core_core_file_failing_command
  PARAMS ((bfd *));
static int osf_core_core_file_failing_signal
  PARAMS ((bfd *));
static bfd_boolean osf_core_core_file_matches_executable_p
  PARAMS ((bfd *, bfd *));
static void swap_abort
  PARAMS ((void));

/* These are stored in the bfd's tdata */

struct osf_core_struct
{
  int sig;
  char cmd[MAXCOMLEN + 1];
};

#define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
#define core_signal(bfd) (core_hdr(bfd)->sig)
#define core_command(bfd) (core_hdr(bfd)->cmd)

static asection *
make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
     bfd *abfd;
     const char *name;
     flagword flags;
     bfd_size_type _raw_size;
     bfd_vma vma;
     file_ptr filepos;
{
  asection *asect;

  asect = bfd_make_section_anyway (abfd, name);
  if (!asect)
    return NULL;

  asect->flags = flags;
  asect->_raw_size = _raw_size;
  asect->vma = vma;
  asect->filepos = filepos;
  asect->alignment_power = 8;

  return asect;
}

static const bfd_target *
osf_core_core_file_p (abfd)
     bfd *abfd;
{
  int val;
  int i;
  char *secname;
  struct core_filehdr core_header;
  bfd_size_type amt;

  amt = sizeof core_header;
  val = bfd_bread ((PTR) &core_header, amt, abfd);
  if (val != sizeof core_header)
    return NULL;

  if (strncmp (core_header.magic, "Core", 4) != 0)
    return NULL;

  core_hdr (abfd) = (struct osf_core_struct *)
    bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
  if (!core_hdr (abfd))
    return NULL;

  strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
  core_signal (abfd) = core_header.signo;

  for (i = 0; i < core_header.nscns; i++)
    {
      struct core_scnhdr core_scnhdr;
      flagword flags;

      amt = sizeof core_scnhdr;
      val = bfd_bread ((PTR) &core_scnhdr, amt, abfd);
      if (val != sizeof core_scnhdr)
        break;

      /* Skip empty sections.  */
      if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
        continue;

      switch (core_scnhdr.scntype)
        {
        case SCNRGN:
          secname = ".data";
          flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
          break;
        case SCNSTACK:
          secname = ".stack";
          flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
          break;
        case SCNREGS:
          secname = ".reg";
          flags = SEC_HAS_CONTENTS;
          break;
        default:
          (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
                                 core_scnhdr.scntype);
          continue;
        }

      if (!make_bfd_asection (abfd, secname, flags,
                              (bfd_size_type) core_scnhdr.size,
                              (bfd_vma) core_scnhdr.vaddr,
                              (file_ptr) core_scnhdr.scnptr))
        goto fail;
    }

  /* OK, we believe you.  You're a core file (sure, sure).  */

  return abfd->xvec;

 fail:
  bfd_release (abfd, core_hdr (abfd));
  core_hdr (abfd) = NULL;
  bfd_section_list_clear (abfd);
  return NULL;
}

static char *
osf_core_core_file_failing_command (abfd)
     bfd *abfd;
{
  return core_command (abfd);
}

/* ARGSUSED */
static int
osf_core_core_file_failing_signal (abfd)
     bfd *abfd;
{
  return core_signal (abfd);
}

/* ARGSUSED */
static bfd_boolean
osf_core_core_file_matches_executable_p (core_bfd, exec_bfd)
     bfd *core_bfd ATTRIBUTE_UNUSED;
     bfd *exec_bfd ATTRIBUTE_UNUSED;
{
  return TRUE;          /* FIXME, We have no way of telling at this point */
}


/* If somebody calls any byte-swapping routines, shoot them.  */
static void
swap_abort()
{
  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
}
#define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
#define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
#define NO_SIGNED_GET \
  ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )

const bfd_target osf_core_vec =
  {
    "osf-core",
    bfd_target_unknown_flavour,
    BFD_ENDIAN_LITTLE,          /* target byte order */
    BFD_ENDIAN_LITTLE,          /* target headers byte order */
    (HAS_RELOC | EXEC_P |       /* object flags */
     HAS_LINENO | HAS_DEBUG |
     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
    0,                                                     /* symbol prefix */
    ' ',                                                   /* ar_pad_char */
    16,                                                    /* ar_max_namelen */
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */

    {                           /* bfd_check_format */
     _bfd_dummy_target,         /* unknown format */
     _bfd_dummy_target,         /* object file */
     _bfd_dummy_target,         /* archive */
     osf_core_core_file_p       /* a core file */
    },
    {                           /* bfd_set_format */
     bfd_false, bfd_false,
     bfd_false, bfd_false
    },
    {                           /* bfd_write_contents */
     bfd_false, bfd_false,
     bfd_false, bfd_false
    },

    BFD_JUMP_TABLE_GENERIC (_bfd_generic),
    BFD_JUMP_TABLE_COPY (_bfd_generic),
    BFD_JUMP_TABLE_CORE (osf_core),
    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
    BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
    BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
    BFD_JUMP_TABLE_WRITE (_bfd_generic),
    BFD_JUMP_TABLE_LINK (_bfd_nolink),
    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

    NULL,

    (PTR) 0                     /* backend_data */
};