Subversion Repositories openrisc_2011-10-31

/* Intel 960 specific support for 32-bit ELF

   Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007

   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 "bfd.h"

#include "libbfd.h"

#include "elf-bfd.h"

#include "elf/i960.h"

#define USE_REL 1

#define bfd_elf32_bfd_reloc_type_lookup elf32_i960_reloc_type_lookup

#define bfd_elf32_bfd_reloc_name_lookup \

  elf32_i960_reloc_name_lookup

#define elf_info_to_howto               elf32_i960_info_to_howto

#define elf_info_to_howto_rel           elf32_i960_info_to_howto_rel

/* ELF relocs are against symbols.  If we are producing relocatable

   output, and the reloc is against an external symbol, and nothing

   has given us any additional addend, the resulting reloc will also

   be against the same symbol.  In such a case, we don't want to

   change anything about the way the reloc is handled, since it will

   all be done at final link time.  Rather than put special case code

   into bfd_perform_relocation, all the reloc types use this howto

   function.  It just short circuits the reloc if producing

   relocatable output against an external symbol.  */

static bfd_reloc_status_type

elf32_i960_relocate (bfd *abfd ATTRIBUTE_UNUSED,

                     arelent *reloc_entry,

                     asymbol *symbol,

                     PTR data ATTRIBUTE_UNUSED,

                     asection *input_section,

                     bfd *output_bfd,

                     char **error_message ATTRIBUTE_UNUSED)

{

  /* HACK: I think this first condition is necessary when producing

     relocatable output.  After the end of HACK, the code is identical

     to bfd_elf_generic_reloc().  I would _guess_ the first change

     belongs there rather than here.  martindo 1998-10-23.  */

  if (output_bfd != (bfd *) NULL

      && reloc_entry->howto->pc_relative

      && !reloc_entry->howto->pcrel_offset)

    reloc_entry->addend -= symbol->value;

  /* This is more dubious.  */

  else if (output_bfd != (bfd *) NULL

           && (symbol->flags & BSF_SECTION_SYM) != 0)

    reloc_entry->addend -= symbol->section->output_section->vma;

  else

    {

      /* ...end of HACK.  */

      if (output_bfd != (bfd *) NULL

          && (symbol->flags & BSF_SECTION_SYM) == 0

          && (! reloc_entry->howto->partial_inplace

              || reloc_entry->addend == 0))

        {

          reloc_entry->address += input_section->output_offset;

          return bfd_reloc_ok;

        }

    }

  return bfd_reloc_continue;

}

static reloc_howto_type elf_howto_table[]=

{

  HOWTO (R_960_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,

         elf32_i960_relocate, "R_960_NONE", TRUE,

         0x00000000, 0x00000000, FALSE),

  EMPTY_HOWTO (1),

  HOWTO (R_960_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,

         elf32_i960_relocate, "R_960_32", TRUE,

         0xffffffff, 0xffffffff, FALSE),

  HOWTO (R_960_IP24, 0, 2, 24, TRUE, 0, complain_overflow_signed,

         elf32_i960_relocate, "R_960_IP24 ", TRUE,

         0x00ffffff, 0x00ffffff, FALSE),

  EMPTY_HOWTO (4),

  EMPTY_HOWTO (5),

  EMPTY_HOWTO (6),

  EMPTY_HOWTO (7)

};

static enum elf_i960_reloc_type

elf32_i960_bfd_to_reloc_type (bfd_reloc_code_real_type code)

{

  switch (code)

    {

    default:

      return R_960_NONE;

    case BFD_RELOC_I960_CALLJ:

      return R_960_OPTCALL;

    case BFD_RELOC_32:

    case BFD_RELOC_CTOR:

      return R_960_32;

    case BFD_RELOC_24_PCREL:

      return R_960_IP24;

    }

}

static void

elf32_i960_info_to_howto (bfd *               abfd ATTRIBUTE_UNUSED,

                          arelent *           cache_ptr ATTRIBUTE_UNUSED,

                          Elf_Internal_Rela * dst ATTRIBUTE_UNUSED)

{

  abort ();

}

static void

elf32_i960_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,

                              arelent *cache_ptr,

                              Elf_Internal_Rela *dst)

{

  enum elf_i960_reloc_type type;

  type = (enum elf_i960_reloc_type) ELF32_R_TYPE (dst->r_info);

  BFD_ASSERT (type < R_960_max);

  cache_ptr->howto = &elf_howto_table[(int) type];

}

static reloc_howto_type *

elf32_i960_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,

                              bfd_reloc_code_real_type code)

{

  return elf_howto_table + elf32_i960_bfd_to_reloc_type (code);

}

static reloc_howto_type *

elf32_i960_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,

                              const char *r_name)

{

  unsigned int i;

  for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)

    if (elf_howto_table[i].name != NULL

        && strcasecmp (elf_howto_table[i].name, r_name) == 0)

      return &elf_howto_table[i];

  return NULL;

}

#define TARGET_LITTLE_SYM       bfd_elf32_i960_vec

#define TARGET_LITTLE_NAME      "elf32-i960"

#define ELF_ARCH                bfd_arch_i960

#define ELF_MACHINE_CODE        EM_960

#define ELF_MAXPAGESIZE         1 /* FIXME: This number is wrong,  It should be the page size in bytes.  */

#include "elf32-target.h"