| 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
| 2 | Copyright 1993 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | /* |
| 21 | * This file contains changes from the Open Software Foundation. |
| 22 | */ |
| 23 | |
| 24 | #include "bfd.h" |
| 25 | #include "sysdep.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "libelf.h" |
| 28 | |
| 29 | #define USE_REL 1 /* 386 uses REL relocations instead of RELA */ |
| 30 | |
| 31 | enum reloc_type |
| 32 | { |
| 33 | R_386_NONE = 0, |
| 34 | R_386_32, R_386_PC32, |
| 35 | R_386_GOT32, R_386_PLT32, |
| 36 | R_386_COPY, |
| 37 | R_386_GLOB_DAT, R_386_JUMP_SLOT, |
| 38 | R_386_RELATIVE, |
| 39 | R_386_GOTOFF, R_386_GOTPC, |
| 40 | R_386_max |
| 41 | }; |
| 42 | |
| 43 | #if 0 |
| 44 | static CONST char *CONST reloc_type_names[] = |
| 45 | { |
| 46 | "R_386_NONE", |
| 47 | "R_386_32", "R_386_PC32", |
| 48 | "R_386_GOT32", "R_386_PLT32", |
| 49 | "R_386_COPY", |
| 50 | "R_386_GLOB_DAT", "R_386_JUMP_SLOT", |
| 51 | "R_386_RELATIVE", |
| 52 | "R_386_GOTOFF", "R_386_GOTPC", |
| 53 | }; |
| 54 | #endif |
| 55 | |
| 56 | |
| 57 | static reloc_howto_type elf_howto_table[]= |
| 58 | { |
| 59 | HOWTO(R_386_NONE, 0,0, 0,false,0, complain_overflow_dont, 0,"R_386_NONE", false,0x00000000,0x00000000,false), |
| 60 | HOWTO(R_386_32, 0,2,32,false,0, complain_overflow_bitfield, 0,"R_386_32", false,0xffffffff,0xffffffff,false), |
| 61 | HOWTO(R_386_PC32, 0,2,32,true, 0, complain_overflow_signed, 0,"R_386_PC32", false,0xffffffff,0xffffffff,false), |
| 62 | HOWTO(R_386_GOT32, 0,2,32,false,0, complain_overflow_bitfield, 0,"R_386_GOT32",false,0xffffffff,0xffffffff,false) |
| 63 | }; |
| 64 | |
| 65 | #ifdef DEBUG_GEN_RELOC |
| 66 | #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) |
| 67 | #else |
| 68 | #define TRACE(str) |
| 69 | #endif |
| 70 | |
| 71 | static CONST struct reloc_howto_struct * |
| 72 | DEFUN (elf_i386_reloc_type_lookup, (abfd, code), |
| 73 | bfd *abfd AND |
| 74 | bfd_reloc_code_real_type code) |
| 75 | { |
| 76 | switch (code) |
| 77 | { |
| 78 | case BFD_RELOC_NONE: |
| 79 | TRACE ("BFD_RELOC_NONE"); |
| 80 | return &elf_howto_table[ (int)R_386_NONE ]; |
| 81 | |
| 82 | case BFD_RELOC_32: |
| 83 | TRACE ("BFD_RELOC_32"); |
| 84 | return &elf_howto_table[ (int)R_386_32 ]; |
| 85 | |
| 86 | case BFD_RELOC_32_PCREL: |
| 87 | TRACE ("BFD_RELOC_PC32"); |
| 88 | return &elf_howto_table[ (int)R_386_PC32 ]; |
| 89 | |
| 90 | default: |
| 91 | abort (); |
| 92 | } |
| 93 | |
| 94 | TRACE ("Unknown"); |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static void |
| 99 | DEFUN(elf_i386_info_to_howto, (abfd, cache_ptr, dst), |
| 100 | bfd *abfd AND |
| 101 | arelent *cache_ptr AND |
| 102 | Elf32_Internal_Rela *dst) |
| 103 | { |
| 104 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < R_386_GOT32); |
| 105 | |
| 106 | cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)]; |
| 107 | } |
| 108 | |
| 109 | static void |
| 110 | DEFUN(elf_i386_info_to_howto_rel, (abfd, cache_ptr, dst), |
| 111 | bfd *abfd AND |
| 112 | arelent *cache_ptr AND |
| 113 | Elf32_Internal_Rel *dst) |
| 114 | { |
| 115 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < R_386_GOT32); |
| 116 | |
| 117 | cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)]; |
| 118 | } |
| 119 | |
| 120 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec |
| 121 | #define TARGET_LITTLE_NAME "elf32-i386" |
| 122 | #define ELF_ARCH bfd_arch_i386 |
| 123 | #define elf_info_to_howto elf_i386_info_to_howto |
| 124 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
| 125 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
| 126 | |
| 127 | #include "elf32-target.h" |