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/* BFD back-end for AIX on PS/2 core files.

   This was based on trad-core.c, which was written by John Gilmore of

        Cygnus Support.

   Copyright 1988, 89, 91, 92, 93, 94, 95, 96, 97, 1998

   Free Software Foundation, Inc.

   Written by Minh Tran-Le <TRANLE@INTELLICORP.COM>.

   Converted to back end form by Ian Lance Taylor <ian@cygnus.com>.

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.  */

#include "bfd.h"

#include "sysdep.h"

#include "libbfd.h"

#include "coff/i386.h"

#include "coff/internal.h"

#include "libcoff.h"

#include <signal.h>

#if defined (_AIX) && defined (_I386)

#define NOCHECKS                /* this is for coredump.h */

#define _h_USER                 /* avoid including user.h from coredump.h */

#include <uinfo.h>

#include <sys/i386/coredump.h>

#endif /* _AIX && _I386 */

/* maybe this could work on some other i386 but I have not tried it

 * mtranle@paris - Tue Sep 24 12:49:35 1991

 */

#ifndef COR_MAGIC

# define COR_MAGIC "core"

#endif

/* need this cast because ptr is really void * */

#define core_hdr(bfd) \

    (((bfd->tdata.trad_core_data))->hdr)

#define core_section(bfd,n) \

    (((bfd)->tdata.trad_core_data)->sections[n])

#define core_regsec(bfd) \

    (((bfd)->tdata.trad_core_data)->reg_section)

#define core_reg2sec(bfd) \

    (((bfd)->tdata.trad_core_data)->reg2_section)

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

struct trad_core_struct {

  struct corehdr *hdr;          /* core file header */

  asection *reg_section;

  asection *reg2_section;

  asection *sections[MAX_CORE_SEGS];

};

static void swap_abort PARAMS ((void));

static const bfd_target *

aix386_core_file_p (abfd)

     bfd *abfd;

{

  int i,n;

  unsigned char longbuf[4];     /* Raw bytes of various header fields */

  int core_size = sizeof (struct corehdr);

  struct corehdr *core;

  struct mergem {

    struct trad_core_struct coredata;

    struct corehdr internal_core;

  } *mergem;

  if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) != sizeof (longbuf))

    {

      if (bfd_get_error () != bfd_error_system_call)

        bfd_set_error (bfd_error_wrong_format);

      return 0;

    }

  if (strncmp(longbuf,COR_MAGIC,4)) return 0;

  if (bfd_seek (abfd, 0L, false) < 0) return 0;

  mergem = (struct mergem *)bfd_zalloc (abfd, sizeof (struct mergem));

  if (mergem == NULL)

    return 0;

  core = &mergem->internal_core;

  if ((bfd_read ((PTR) core, 1, core_size, abfd)) != core_size)

    {

      if (bfd_get_error () != bfd_error_system_call)

        bfd_set_error (bfd_error_wrong_format);

      bfd_release (abfd, (char *)mergem);

      return 0;

    }

  set_tdata (abfd, &mergem->coredata);

  core_hdr (abfd) = core;

  /* create the sections.  This is raunchy, but bfd_close wants to reclaim

     them */

  core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));

  if (core_regsec (abfd) == NULL)

    {

    loser:

      bfd_release (abfd, (char *)mergem);

      return 0;

    }

  core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));

  if (core_reg2sec (abfd) == NULL)

    {

    loser1:

     bfd_release (abfd, core_regsec (abfd));

      goto loser;

    }

  for (i=0, n=0 ; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type) ; i++)

    {

      if (core->cd_segs[i].cs_offset == 0)

        continue;

      core_section (abfd,n) =

        (asection *) bfd_zalloc (abfd, sizeof (asection));

      if (core_section (abfd,n) == NULL)

        {

          int j;

          if (n > 0)

            {

              for (j=0; j < n; j++)

                bfd_release (abfd, core_section(abfd, j));

            }

          bfd_release (abfd, (char *)mergem);

          goto loser1;

        }

      switch (core->cd_segs[i].cs_type)

        {

        case COR_TYPE_DATA:

          core_section (abfd, n)->name = ".data";

          core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +

                                           SEC_HAS_CONTENTS);

          break;

        case COR_TYPE_STACK:

          core_section (abfd, n)->name = ".stack";

          core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +

                                           SEC_HAS_CONTENTS);

          break;

        case COR_TYPE_LIBDATA:

          core_section (abfd, n)->name = ".libdata";

          core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);

          break;

        case COR_TYPE_WRITE:

          core_section (abfd, n)->name = ".writeable";

          core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);

          break;

        case COR_TYPE_MSC:

          core_section (abfd, n)->name = ".misc";

          core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);

          break;

        default:

          core_section (abfd, n)->name = ".unknown";

          core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);

          break;

        }

      core_section (abfd, n)->_raw_size = core->cd_segs[i].cs_len;

      core_section (abfd, n)->vma       = core->cd_segs[i].cs_address;

      core_section (abfd, n)->filepos   = core->cd_segs[i].cs_offset;

      core_section (abfd, n)->alignment_power = 2;

      core_section (abfd, n)->next      = NULL;

      if (n > 0)

        core_section (abfd, (n-1))->next = core_section (abfd, n);

      abfd->section_count = ++n;

    }

  core_regsec (abfd)->name = ".reg";

  core_reg2sec (abfd)->name = ".reg2";

  core_regsec (abfd)->flags = SEC_HAS_CONTENTS;

  core_reg2sec (abfd)->flags = SEC_HAS_CONTENTS;

  core_regsec (abfd)->_raw_size = sizeof(core->cd_regs);

  core_reg2sec (abfd)->_raw_size = sizeof(core->cd_fpregs);

  core_regsec (abfd)->vma = -1;

  core_reg2sec (abfd)->vma = -1;

  /* We'll access the regs afresh in the core file, like any section: */

  core_regsec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,cd_regs[0]);

  core_reg2sec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,

                                                    cd_fpregs);

  /* add the 2 reg fake sections to abfd */

  abfd->section_count += 2;

  abfd->sections = core_regsec (abfd);

  core_regsec (abfd)->next = core_reg2sec (abfd);

  core_reg2sec (abfd)->next = core_section (abfd, 0);

  return abfd->xvec;

}

static char *

aix386_core_file_failing_command (abfd)

     bfd *abfd;

{

  return core_hdr (abfd)->cd_comm;

}

static int

aix386_core_file_failing_signal (abfd)

     bfd *abfd;

{

  return core_hdr (abfd)->cd_cursig;

}

static boolean

aix386_core_file_matches_executable_p (core_bfd, exec_bfd)

     bfd *core_bfd;

     bfd *exec_bfd;

{

  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  ((PROTO(bfd_vma, (*), (       const bfd_byte *))) swap_abort )

#define NO_GETS ((PROTO(bfd_signed_vma, (*), (const bfd_byte *))) swap_abort )

#define NO_PUT  ((PROTO(void,        (*), (bfd_vma, bfd_byte *))) swap_abort )

const bfd_target aix386_core_vec =

  {

    "aix386-core",

    bfd_target_unknown_flavour,

    BFD_ENDIAN_BIG,             /* target byte order */

    BFD_ENDIANG_BIG,            /* target headers byte order */

  (HAS_RELOC | EXEC_P |         /* object flags */

   HAS_LINENO | HAS_DEBUG |

   HAS_SYMS | HAS_LOCALS | WP_TEXT),

  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */

    0,                                           /* leading underscore */

    ' ',                                        /* ar_pad_char */

    16,                                         /* ar_max_namelen */

    NO_GET, NO_GETS, NO_PUT,

    NO_GET, NO_GETS, NO_PUT,

    NO_GET, NO_GETS, NO_PUT, /* data */

    NO_GET, NO_GETS, NO_PUT,

    NO_GET, NO_GETS, NO_PUT,

    NO_GET, NO_GETS, NO_PUT, /* hdrs */

    {_bfd_dummy_target, _bfd_dummy_target,

     _bfd_dummy_target, aix386_core_file_p},

    {bfd_false, bfd_false,      /* bfd_create_object */

     bfd_false, bfd_false},

    {bfd_false, bfd_false,      /* bfd_write_contents */

     bfd_false, bfd_false},

     BFD_JUMP_TABLE_GENERIC (_bfd_generic),

     BFD_JUMP_TABLE_COPY (_bfd_generic),

     BFD_JUMP_TABLE_CORE (aix386),

     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

};