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/* BFD back-end for OSF/1 core files.

   Copyright 1993, 94, 95, 97, 1998 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 asymbol *

osf_core_make_empty_symbol PARAMS ((bfd *));

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 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 asymbol *

osf_core_make_empty_symbol (abfd)

     bfd *abfd;

{

  asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));

  if (new)

    new->the_bfd = abfd;

  return new;

}

static const bfd_target *

osf_core_core_file_p (abfd)

     bfd *abfd;

{

  int val;

  int i;

  char *secname;

  struct core_filehdr core_header;

  val = bfd_read ((PTR)&core_header, 1, sizeof core_header, 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, 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;

      val = bfd_read ((PTR)&core_scnhdr, 1, sizeof core_scnhdr, 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))

        return NULL;

    }

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

  return abfd->xvec;

}

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 boolean

osf_core_core_file_matches_executable_p (core_bfd, exec_bfd)

     bfd *core_bfd, *exec_bfd;

{

  return true;          /* FIXME, We have no way of telling at this point */

}

#define osf_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound

#define osf_core_get_symtab _bfd_nosymbols_get_symtab

#define osf_core_print_symbol _bfd_nosymbols_print_symbol

#define osf_core_get_symbol_info _bfd_nosymbols_get_symbol_info

#define osf_core_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name

#define osf_core_get_lineno _bfd_nosymbols_get_lineno

#define osf_core_find_nearest_line _bfd_nosymbols_find_nearest_line

#define osf_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol

#define osf_core_read_minisymbols _bfd_nosymbols_read_minisymbols

#define osf_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol

/* 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_BIG,             /* target byte order */

    BFD_ENDIAN_BIG,             /* 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 (osf_core),

       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 */

};