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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf32-i960.c] - Blame information for rev 14

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1 14 khays
/* Intel 960 specific support for 32-bit ELF
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   Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007
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   Free Software Foundation, Inc.
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   This file is part of BFD, the Binary File Descriptor library.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/i960.h"
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#define USE_REL 1
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#define bfd_elf32_bfd_reloc_type_lookup elf32_i960_reloc_type_lookup
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#define bfd_elf32_bfd_reloc_name_lookup \
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  elf32_i960_reloc_name_lookup
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#define elf_info_to_howto               elf32_i960_info_to_howto
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#define elf_info_to_howto_rel           elf32_i960_info_to_howto_rel
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/* ELF relocs are against symbols.  If we are producing relocatable
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   output, and the reloc is against an external symbol, and nothing
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   has given us any additional addend, the resulting reloc will also
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   be against the same symbol.  In such a case, we don't want to
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   change anything about the way the reloc is handled, since it will
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   all be done at final link time.  Rather than put special case code
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   into bfd_perform_relocation, all the reloc types use this howto
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   function.  It just short circuits the reloc if producing
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   relocatable output against an external symbol.  */
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static bfd_reloc_status_type
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elf32_i960_relocate (bfd *abfd ATTRIBUTE_UNUSED,
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                     arelent *reloc_entry,
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                     asymbol *symbol,
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                     PTR data ATTRIBUTE_UNUSED,
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                     asection *input_section,
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                     bfd *output_bfd,
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                     char **error_message ATTRIBUTE_UNUSED)
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{
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  /* HACK: I think this first condition is necessary when producing
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     relocatable output.  After the end of HACK, the code is identical
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     to bfd_elf_generic_reloc().  I would _guess_ the first change
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     belongs there rather than here.  martindo 1998-10-23.  */
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  if (output_bfd != (bfd *) NULL
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      && reloc_entry->howto->pc_relative
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      && !reloc_entry->howto->pcrel_offset)
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    reloc_entry->addend -= symbol->value;
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  /* This is more dubious.  */
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  else if (output_bfd != (bfd *) NULL
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           && (symbol->flags & BSF_SECTION_SYM) != 0)
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    reloc_entry->addend -= symbol->section->output_section->vma;
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  else
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    {
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      /* ...end of HACK.  */
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      if (output_bfd != (bfd *) NULL
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          && (symbol->flags & BSF_SECTION_SYM) == 0
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          && (! reloc_entry->howto->partial_inplace
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              || reloc_entry->addend == 0))
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        {
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          reloc_entry->address += input_section->output_offset;
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          return bfd_reloc_ok;
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        }
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    }
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  return bfd_reloc_continue;
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}
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static reloc_howto_type elf_howto_table[]=
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{
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  HOWTO (R_960_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
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         elf32_i960_relocate, "R_960_NONE", TRUE,
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         0x00000000, 0x00000000, FALSE),
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  EMPTY_HOWTO (1),
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  HOWTO (R_960_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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         elf32_i960_relocate, "R_960_32", TRUE,
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         0xffffffff, 0xffffffff, FALSE),
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  HOWTO (R_960_IP24, 0, 2, 24, TRUE, 0, complain_overflow_signed,
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         elf32_i960_relocate, "R_960_IP24 ", TRUE,
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         0x00ffffff, 0x00ffffff, FALSE),
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  EMPTY_HOWTO (4),
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  EMPTY_HOWTO (5),
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  EMPTY_HOWTO (6),
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  EMPTY_HOWTO (7)
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};
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static enum elf_i960_reloc_type
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elf32_i960_bfd_to_reloc_type (bfd_reloc_code_real_type code)
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{
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  switch (code)
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    {
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    default:
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      return R_960_NONE;
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    case BFD_RELOC_I960_CALLJ:
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      return R_960_OPTCALL;
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    case BFD_RELOC_32:
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    case BFD_RELOC_CTOR:
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      return R_960_32;
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    case BFD_RELOC_24_PCREL:
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      return R_960_IP24;
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    }
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}
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static void
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elf32_i960_info_to_howto (bfd *               abfd ATTRIBUTE_UNUSED,
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                          arelent *           cache_ptr ATTRIBUTE_UNUSED,
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                          Elf_Internal_Rela * dst ATTRIBUTE_UNUSED)
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{
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  abort ();
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}
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static void
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elf32_i960_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
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                              arelent *cache_ptr,
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                              Elf_Internal_Rela *dst)
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{
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  enum elf_i960_reloc_type type;
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  type = (enum elf_i960_reloc_type) ELF32_R_TYPE (dst->r_info);
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  BFD_ASSERT (type < R_960_max);
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  cache_ptr->howto = &elf_howto_table[(int) type];
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}
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static reloc_howto_type *
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elf32_i960_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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                              bfd_reloc_code_real_type code)
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{
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  return elf_howto_table + elf32_i960_bfd_to_reloc_type (code);
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}
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static reloc_howto_type *
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elf32_i960_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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                              const char *r_name)
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{
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  unsigned int i;
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  for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
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    if (elf_howto_table[i].name != NULL
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        && strcasecmp (elf_howto_table[i].name, r_name) == 0)
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      return &elf_howto_table[i];
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  return NULL;
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}
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#define TARGET_LITTLE_SYM       bfd_elf32_i960_vec
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#define TARGET_LITTLE_NAME      "elf32-i960"
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#define ELF_ARCH                bfd_arch_i960
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#define ELF_MACHINE_CODE        EM_960
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#define ELF_MAXPAGESIZE         1 /* FIXME: This number is wrong,  It should be the page size in bytes.  */
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#include "elf32-target.h"

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