/* 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, 1989, 1991, 1992, 1993, 1994, 1996, 1998, 1999, 2000,
   2001, 2002, 2004
   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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 */
  bfd_size_type core_size = sizeof (struct corehdr);
  bfd_size_type amt;
  struct corehdr *core;
  struct mergem {
    struct trad_core_struct coredata;
    struct corehdr internal_core;
  } *mergem;

  amt = sizeof (longbuf);
  if (bfd_bread ((PTR) longbuf, amt, abfd) != amt)
    {
      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, (file_ptr) 0, 0) != 0)
    return 0;

  amt = sizeof (struct mergem);
  mergem = (struct mergem *) bfd_zalloc (abfd, amt);
  if (mergem == NULL)
    return 0;

  core = &mergem->internal_core;

  if ((bfd_bread ((PTR) core, core_size, abfd)) != core_size)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
    loser:
      bfd_release (abfd, (char *) mergem);
      abfd->tdata.any = NULL;
      bfd_section_list_clear (abfd);
      return 0;
    }

  set_tdata (abfd, &mergem->coredata);
  core_hdr (abfd) = core;

  /* Create the sections.  */
  core_regsec (abfd) = bfd_make_section_anyway (abfd, ".reg");
  if (core_regsec (abfd) == NULL)
    goto loser;

  core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
  core_regsec (abfd)->size = sizeof (core->cd_regs);
  core_regsec (abfd)->vma = (bfd_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) = bfd_make_section_anyway (abfd, ".reg2");
  if (core_reg2sec (abfd) == NULL)
    /* bfd_release frees everything allocated after it's arg.  */
    goto loser;

  core_reg2sec (abfd)->flags = SEC_HAS_CONTENTS;
  core_reg2sec (abfd)->size = sizeof (core->cd_fpregs);
  core_reg2sec (abfd)->vma = (bfd_vma) -1;
  core_reg2sec (abfd)->filepos =
    (file_ptr) offsetof (struct corehdr, cd_fpregs);

  for (i = 0, n = 0; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type); i++)
    {
      const char *sname;
      flagword flags;

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

      switch (core->cd_segs[i].cs_type)
	{
	case COR_TYPE_DATA:
	  sname = ".data";
	  flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
	  break;
	case COR_TYPE_STACK:
	  sname = ".stack";
	  flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
	  break;
	case COR_TYPE_LIBDATA:
	  sname = ".libdata";
	  flags = SEC_ALLOC + SEC_HAS_CONTENTS;
	  break;
	case COR_TYPE_WRITE:
	  sname = ".writeable";
	  flags = SEC_ALLOC + SEC_HAS_CONTENTS;
	  break;
	case COR_TYPE_MSC:
	  sname = ".misc";
	  flags = SEC_ALLOC + SEC_HAS_CONTENTS;
	  break;
	default:
	  sname = ".unknown";
	  flags = SEC_ALLOC + SEC_HAS_CONTENTS;
	  break;
	}
      core_section (abfd, n) = bfd_make_section_anyway (abfd, sname);
      if (core_section (abfd, n) == NULL)
	goto loser;

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

  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 bfd_boolean
aix386_core_file_matches_executable_p (core_bfd, exec_bfd)
     bfd *core_bfd;
     bfd *exec_bfd;
{
  /* FIXME: We have no way of telling at this point.  */
  return TRUE;
}

/* If somebody calls any byte-swapping routines, shoot them.  */

static void
swap_abort ()
{
  /* This way doesn't require any declaration for ANSI to fuck up.  */
  abort ();
}

#define	NO_GET ((bfd_vma (*) (const void *)) swap_abort)
#define	NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
#define	NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
#define	NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
#define	NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
#define	NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)

const bfd_target aix386_core_vec = {
  "aix386-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),

  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  0,				/* leading underscore */
  ' ',				/* ar_pad_char */
  16,				/* ar_max_namelen */
  NO_GET64, NO_GETS64, NO_PUT64,
  NO_GET, NO_GETS, NO_PUT,
  NO_GET, NO_GETS, NO_PUT,	/* data */
  NO_GET64, NO_GETS64, NO_PUT64,
  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
};