172 lines
5.6 KiB
C
172 lines
5.6 KiB
C
/* Intel 80386/80486-specific support for 32-bit ELF
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Copyright 1993 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "libelf.h"
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#define USE_REL 1 /* 386 uses REL relocations instead of RELA */
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enum reloc_type
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{
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R_386_NONE = 0,
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R_386_32,
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R_386_PC32,
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R_386_GOT32,
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R_386_PLT32,
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R_386_COPY,
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R_386_GLOB_DAT,
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R_386_JUMP_SLOT,
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R_386_RELATIVE,
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R_386_GOTOFF,
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R_386_GOTPC,
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R_386_max
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};
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#if 0
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static CONST char *CONST reloc_type_names[] =
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{
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"R_386_NONE",
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"R_386_32",
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"R_386_PC32",
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"R_386_GOT32",
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"R_386_PLT32",
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"R_386_COPY",
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"R_386_GLOB_DAT",
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"R_386_JUMP_SLOT",
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"R_386_RELATIVE",
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"R_386_GOTOFF",
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"R_386_GOTPC",
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};
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#endif
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static reloc_howto_type elf_howto_table[]=
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{
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HOWTO(R_386_NONE, 0,0, 0,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_NONE", true,0x00000000,0x00000000,false),
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HOWTO(R_386_32, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_32", true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_PC32, 0,2,32,true, 0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PC32", true,0xffffffff,0xffffffff,true),
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HOWTO(R_386_GOT32, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOT32", true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_PLT32, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PLT32", true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_COPY, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_COPY", true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_GLOB_DAT, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GLOB_DAT", true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_JUMP_SLOT, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_JUMP_SLOT",true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_RELATIVE, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_RELATIVE", true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_GOTOFF, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOTOFF", true,0xffffffff,0xffffffff,false),
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HOWTO(R_386_GOTPC, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOTPC", true,0xffffffff,0xffffffff,false),
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};
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#ifdef DEBUG_GEN_RELOC
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#define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
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#else
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#define TRACE(str)
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#endif
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static CONST struct reloc_howto_struct *
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DEFUN (elf_i386_reloc_type_lookup, (abfd, code),
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bfd *abfd AND
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bfd_reloc_code_real_type code)
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{
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switch (code)
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{
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case BFD_RELOC_NONE:
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TRACE ("BFD_RELOC_NONE");
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return &elf_howto_table[ (int)R_386_NONE ];
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case BFD_RELOC_32:
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TRACE ("BFD_RELOC_32");
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return &elf_howto_table[ (int)R_386_32 ];
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case BFD_RELOC_32_PCREL:
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TRACE ("BFD_RELOC_PC32");
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return &elf_howto_table[ (int)R_386_PC32 ];
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case BFD_RELOC_386_GOT32:
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TRACE ("BFD_RELOC_386_GOT32");
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return &elf_howto_table[ (int)R_386_GOT32 ];
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case BFD_RELOC_386_PLT32:
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TRACE ("BFD_RELOC_386_PLT32");
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return &elf_howto_table[ (int)R_386_PLT32 ];
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case BFD_RELOC_386_COPY:
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TRACE ("BFD_RELOC_386_COPY");
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return &elf_howto_table[ (int)R_386_COPY ];
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case BFD_RELOC_386_GLOB_DAT:
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TRACE ("BFD_RELOC_386_GLOB_DAT");
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return &elf_howto_table[ (int)R_386_GLOB_DAT ];
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case BFD_RELOC_386_JUMP_SLOT:
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TRACE ("BFD_RELOC_386_JUMP_SLOT");
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return &elf_howto_table[ (int)R_386_JUMP_SLOT ];
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case BFD_RELOC_386_RELATIVE:
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TRACE ("BFD_RELOC_386_RELATIVE");
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return &elf_howto_table[ (int)R_386_RELATIVE ];
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case BFD_RELOC_386_GOTOFF:
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TRACE ("BFD_RELOC_386_GOTOFF");
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return &elf_howto_table[ (int)R_386_GOTOFF ];
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case BFD_RELOC_386_GOTPC:
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TRACE ("BFD_RELOC_386_GOTPC");
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return &elf_howto_table[ (int)R_386_GOTPC ];
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default:
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break;
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}
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TRACE ("Unknown");
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return 0;
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}
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static void
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DEFUN(elf_i386_info_to_howto, (abfd, cache_ptr, dst),
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bfd *abfd AND
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arelent *cache_ptr AND
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Elf32_Internal_Rela *dst)
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{
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BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_386_max);
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cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
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}
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static void
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DEFUN(elf_i386_info_to_howto_rel, (abfd, cache_ptr, dst),
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bfd *abfd AND
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arelent *cache_ptr AND
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Elf32_Internal_Rel *dst)
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{
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BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_386_max);
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cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
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}
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#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
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#define TARGET_LITTLE_NAME "elf32-i386"
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#define ELF_ARCH bfd_arch_i386
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#define ELF_MACHINE_CODE EM_386
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#define elf_info_to_howto elf_i386_info_to_howto
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#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
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#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
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#define ELF_MAXPAGESIZE 0x1000
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#include "elf32-target.h"
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