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/* BFD back-end for Irix core files.

   Copyright 1993, 1994, 1996, 1999, 2001, 2002, 2004, 2005, 2006, 2007

   Free Software Foundation, Inc.

   Written by Stu Grossman, Cygnus Support.

   Converted to back-end form by Ian Lance Taylor, Cygnus Support

   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.  */

/* This file can only be compiled on systems which use Irix style core

   files (namely, Irix 4 and Irix 5, so far).  */

#include "sysdep.h"

#include "bfd.h"

#include "libbfd.h"

#ifdef IRIX_CORE

#include <core.out.h>

struct sgi_core_struct

{

  int sig;

  char cmd[CORE_NAMESIZE];

};

#define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)

#define core_signal(bfd) (core_hdr(bfd)->sig)

#define core_command(bfd) (core_hdr(bfd)->cmd)

#define irix_core_core_file_matches_executable_p generic_core_file_matches_executable_p

static asection *make_bfd_asection

  (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr);

/* Helper function for irix_core_core_file_p:

   32-bit and 64-bit versions.  */

#ifdef CORE_MAGIC64

static int

do_sections64 (bfd *abfd, struct coreout *coreout)

{

  struct vmap64 vmap;

  char *secname;

  int i, val;

  for (i = 0; i < coreout->c_nvmap; i++)

    {

      val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);

      if (val != sizeof vmap)

        break;

      switch (vmap.v_type)

        {

        case VDATA:

          secname = ".data";

          break;

        case VSTACK:

          secname = ".stack";

          break;

#ifdef VMAPFILE

        case VMAPFILE:

          secname = ".mapfile";

          break;

#endif

        default:

          continue;

        }

      /* A file offset of zero means that the

         section is not contained in the corefile.  */

      if (vmap.v_offset == 0)

        continue;

      if (!make_bfd_asection (abfd, secname,

                              SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,

                              vmap.v_len, vmap.v_vaddr, vmap.v_offset))

        /* Fail.  */

        return 0;

    }

  return 1;

}

#endif

/* 32-bit version.  */

static int

do_sections (bfd *abfd, struct coreout *coreout)

{

  struct vmap vmap;

  char *secname;

  int i, val;

  for (i = 0; i < coreout->c_nvmap; i++)

    {

      val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);

      if (val != sizeof vmap)

        break;

      switch (vmap.v_type)

        {

        case VDATA:

          secname = ".data";

          break;

        case VSTACK:

          secname = ".stack";

          break;

#ifdef VMAPFILE

        case VMAPFILE:

          secname = ".mapfile";

          break;

#endif

        default:

          continue;

        }

      /* A file offset of zero means that the

         section is not contained in the corefile.  */

      if (vmap.v_offset == 0)

        continue;

      if (!make_bfd_asection (abfd, secname,

                              SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,

                              vmap.v_len, vmap.v_vaddr, vmap.v_offset))

        /* Fail.  */

        return 0;

    }

  return 1;

}

static asection *

make_bfd_asection (bfd *abfd,

                   const char *name,

                   flagword flags,

                   bfd_size_type size,

                   bfd_vma vma,

                   file_ptr filepos)

{

  asection *asect;

  asect = bfd_make_section_anyway_with_flags (abfd, name, flags);

  if (!asect)

    return NULL;

  asect->size = size;

  asect->vma = vma;

  asect->filepos = filepos;

  asect->alignment_power = 4;

  return asect;

}

static const bfd_target *

irix_core_core_file_p (bfd *abfd)

{

  int val;

  struct coreout coreout;

  struct idesc *idg, *idf, *ids;

  bfd_size_type amt;

  val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);

  if (val != sizeof coreout)

    {

      if (bfd_get_error () != bfd_error_system_call)

        bfd_set_error (bfd_error_wrong_format);

      return 0;

    }

  if (coreout.c_version != CORE_VERSION1)

    return 0;

  /* Have we got a corefile?  */

  switch (coreout.c_magic)

    {

    case CORE_MAGIC:    break;

#ifdef CORE_MAGIC64

    case CORE_MAGIC64:  break;

#endif

#ifdef CORE_MAGICN32

    case CORE_MAGICN32: break;

#endif

    default:            return 0;        /* Un-identifiable or not corefile.  */

    }

  amt = sizeof (struct sgi_core_struct);

  core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);

  if (!core_hdr (abfd))

    return NULL;

  strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);

  core_signal (abfd) = coreout.c_sigcause;

  if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)

    goto fail;

  /* Process corefile sections.  */

#ifdef CORE_MAGIC64

  if (coreout.c_magic == (int) CORE_MAGIC64)

    {

      if (! do_sections64 (abfd, & coreout))

        goto fail;

    }

  else

#endif

    if (! do_sections (abfd, & coreout))

      goto fail;

  /* Make sure that the regs are contiguous within the core file.  */

  idg = &coreout.c_idesc[I_GPREGS];

  idf = &coreout.c_idesc[I_FPREGS];

  ids = &coreout.c_idesc[I_SPECREGS];

  if (idg->i_offset + idg->i_len != idf->i_offset

      || idf->i_offset + idf->i_len != ids->i_offset)

    goto fail;                  /* Can't deal with non-contig regs */

  if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)

    goto fail;

  if (!make_bfd_asection (abfd, ".reg",

                          SEC_HAS_CONTENTS,

                          idg->i_len + idf->i_len + ids->i_len,

                          0,

                          idg->i_offset))

    goto fail;

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

  bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);

  return abfd->xvec;

 fail:

  bfd_release (abfd, core_hdr (abfd));

  core_hdr (abfd) = NULL;

  bfd_section_list_clear (abfd);

  return NULL;

}

static char *

irix_core_core_file_failing_command (bfd *abfd)

{

  return core_command (abfd);

}

static int

irix_core_core_file_failing_signal (bfd *abfd)

{

  return core_signal (abfd);

}

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

static void

swap_abort(void)

{

  abort(); /* This way doesn't require any declaration for ANSI to fuck up */

}

#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 irix_core_vec =

  {

    "irix-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_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */

    NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */

    NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */

    NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */

    NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */

    NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */

    {                           /* bfd_check_format */

      _bfd_dummy_target,                /* unknown format */

      _bfd_dummy_target,                /* object file */

      _bfd_dummy_target,                /* archive */

      irix_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 (irix_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 */

  };

#endif /* IRIX_CORE */