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/* Intel x86-64 Mach-O support for BFD.

   Copyright 2010

   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 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.  */

#include "sysdep.h"

#include "mach-o.h"

#include "bfd.h"

#include "libbfd.h"

#include "libiberty.h"

#define bfd_mach_o_object_p bfd_mach_o_x86_64_object_p

#define bfd_mach_o_core_p bfd_mach_o_x86_64_core_p

#define bfd_mach_o_mkobject bfd_mach_o_x86_64_mkobject

static const bfd_target *

bfd_mach_o_x86_64_object_p (bfd *abfd)

{

  return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_X86_64);

}

static const bfd_target *

bfd_mach_o_x86_64_core_p (bfd *abfd)

{

  return bfd_mach_o_header_p (abfd,

                              BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64);

}

static bfd_boolean

bfd_mach_o_x86_64_mkobject (bfd *abfd)

{

  bfd_mach_o_data_struct *mdata;

  if (!bfd_mach_o_mkobject_init (abfd))

    return FALSE;

  mdata = bfd_mach_o_get_data (abfd);

  mdata->header.magic = BFD_MACH_O_MH_MAGIC;

  mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64;

  mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL;

  mdata->header.byteorder = BFD_ENDIAN_LITTLE;

  mdata->header.version = 1;

  return TRUE;

}

/* In case we're on a 32-bit machine, construct a 64-bit "-1" value.  */

#define MINUS_ONE (~ (bfd_vma) 0)

static reloc_howto_type x86_64_howto_table[]=

{

  /* 0 */

  HOWTO(BFD_RELOC_64, 0, 4, 64, FALSE, 0,

        complain_overflow_bitfield,

        NULL, "64",

        FALSE, MINUS_ONE, MINUS_ONE, FALSE),

  HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,

        complain_overflow_bitfield,

        NULL, "32",

        FALSE, 0xffffffff, 0xffffffff, FALSE),

  HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "DISP32",

        FALSE, 0xffffffff, 0xffffffff, TRUE),

  HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_1, 0, 2, 32, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "DISP32_1",

        FALSE, 0xffffffff, 0xffffffff, TRUE),

  /* 4 */

  HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "DISP32_2",

        FALSE, 0xffffffff, 0xffffffff, TRUE),

  HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "DISP32_4",

        FALSE, 0xffffffff, 0xffffffff, TRUE),

  HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "BRANCH32",

        FALSE, 0xffffffff, 0xffffffff, TRUE),

  HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "GOT_LOAD",

        FALSE, 0xffffffff, 0xffffffff, TRUE),

  /* 8 */

  HOWTO(BFD_RELOC_MACH_O_X86_64_SUBTRACTOR32, 0, 2, 32, FALSE, 0,

        complain_overflow_bitfield,

        NULL, "SUBTRACTOR32",

        FALSE, 0xffffffff, 0xffffffff, FALSE),

  HOWTO(BFD_RELOC_MACH_O_X86_64_SUBTRACTOR64, 0, 4, 64, FALSE, 0,

        complain_overflow_bitfield,

        NULL, "SUBTRACTOR64",

        FALSE, MINUS_ONE, MINUS_ONE, FALSE),

  HOWTO(BFD_RELOC_MACH_O_X86_64_GOT, 0, 2, 32, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "GOT",

        FALSE, 0xffffffff, 0xffffffff, TRUE),

  HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, TRUE, 0,

        complain_overflow_bitfield,

        NULL, "BRANCH8",

        FALSE, 0xff, 0xff, TRUE),

};

static bfd_boolean

bfd_mach_o_x86_64_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc)

{

  /* On x86-64, scattered relocs are not used.  */

  if (reloc->r_scattered)

    return FALSE;

  switch (reloc->r_type)

    {

    case BFD_MACH_O_X86_64_RELOC_UNSIGNED:

      if (reloc->r_pcrel)

        return FALSE;

      switch (reloc->r_length)

        {

        case 2:

          res->howto = &x86_64_howto_table[1];

          return TRUE;

        case 3:

          res->howto = &x86_64_howto_table[0];

          return TRUE;

        default:

          return FALSE;

        }

    case BFD_MACH_O_X86_64_RELOC_SIGNED:

      if (reloc->r_length == 2 && reloc->r_pcrel)

        {

          res->howto = &x86_64_howto_table[2];

          return TRUE;

        }

      break;

    case BFD_MACH_O_X86_64_RELOC_BRANCH:

      if (!reloc->r_pcrel)

        return FALSE;

      switch (reloc->r_length)

        {

        case 2:

          res->howto = &x86_64_howto_table[6];

          return TRUE;

        default:

          return FALSE;

        }

      break;

    case BFD_MACH_O_X86_64_RELOC_GOT_LOAD:

      if (reloc->r_length == 2 && reloc->r_pcrel && reloc->r_extern)

        {

          res->howto = &x86_64_howto_table[7];

          return TRUE;

        }

      break;

    case BFD_MACH_O_X86_64_RELOC_GOT:

      if (reloc->r_length == 2 && reloc->r_pcrel && reloc->r_extern)

        {

          res->howto = &x86_64_howto_table[10];

          return TRUE;

        }

      break;

    case BFD_MACH_O_X86_64_RELOC_SUBTRACTOR:

      if (reloc->r_pcrel)

        return FALSE;

      switch (reloc->r_length)

        {

        case 2:

          res->howto = &x86_64_howto_table[8];

          return TRUE;

        case 3:

          res->howto = &x86_64_howto_table[9];

          return TRUE;

        default:

          return FALSE;

        }

      break;

    case BFD_MACH_O_X86_64_RELOC_SIGNED_1:

      if (reloc->r_length == 2 && reloc->r_pcrel)

        {

          res->howto = &x86_64_howto_table[3];

          return TRUE;

        }

      break;

    case BFD_MACH_O_X86_64_RELOC_SIGNED_2:

      if (reloc->r_length == 2 && reloc->r_pcrel)

        {

          res->howto = &x86_64_howto_table[4];

          return TRUE;

        }

      break;

    case BFD_MACH_O_X86_64_RELOC_SIGNED_4:

      if (reloc->r_length == 2 && reloc->r_pcrel)

        {

          res->howto = &x86_64_howto_table[5];

          return TRUE;

        }

      break;

    default:

      return FALSE;

    }

  return FALSE;

}

static bfd_boolean

bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)

{

  rinfo->r_address = rel->address;

  switch (rel->howto->type)

    {

    case BFD_RELOC_64:

      rinfo->r_scattered = 0;

      rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED;

      rinfo->r_pcrel = 0;

      rinfo->r_length = rel->howto->size; /* Correct in practice.  */

      if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)

        {

          rinfo->r_extern = 0;

          rinfo->r_value = (*rel->sym_ptr_ptr)->section->target_index;

        }

      else

        {

          rinfo->r_extern = 1;

          rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;

        }

      break;

    default:

      return FALSE;

    }

  return TRUE;

}

static reloc_howto_type *

bfd_mach_o_x86_64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,

                                         bfd_reloc_code_real_type code)

{

  unsigned int i;

  for (i = 0;

       i < sizeof (x86_64_howto_table) / sizeof (*x86_64_howto_table);

       i++)

    if (code == x86_64_howto_table[i].type)

      return &x86_64_howto_table[i];

  return NULL;

}

static reloc_howto_type *

bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,

                                         const char *name ATTRIBUTE_UNUSED)

{

  return NULL;

}

#define bfd_mach_o_swap_reloc_in bfd_mach_o_x86_64_swap_reloc_in

#define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out

#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_x86_64_bfd_reloc_type_lookup

#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup

#define bfd_mach_o_print_thread NULL

#define TARGET_NAME             mach_o_x86_64_vec

#define TARGET_STRING           "mach-o-x86-64"

#define TARGET_ARCHITECTURE     bfd_arch_i386

#define TARGET_BIG_ENDIAN       0

#define TARGET_ARCHIVE          0

#include "mach-o-target.c"