Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* x86_64 specific symbolic name handling. |
| 2 | Copyright (C) 2002, 2005 Red Hat, Inc. |
| 3 | Written by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 4 | |
| 5 | This program is Open Source software; you can redistribute it and/or |
| 6 | modify it under the terms of the Open Software License version 1.0 as |
| 7 | published by the Open Source Initiative. |
| 8 | |
| 9 | You should have received a copy of the Open Software License along |
| 10 | with this program; if not, you may obtain a copy of the Open Software |
| 11 | License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| 12 | by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 13 | 3001 King Ranch Road, Ukiah, CA 95482. */ |
| 14 | |
| 15 | #ifdef HAVE_CONFIG_H |
| 16 | # include <config.h> |
| 17 | #endif |
| 18 | |
| 19 | #include <assert.h> |
| 20 | #include <elf.h> |
| 21 | #include <stddef.h> |
| 22 | |
| 23 | #include <libebl_x86_64.h> |
| 24 | |
| 25 | |
| 26 | /* Return of the backend. */ |
| 27 | const char * |
| 28 | x86_64_backend_name (void) |
| 29 | { |
| 30 | return "x86-64"; |
| 31 | } |
| 32 | |
| 33 | |
| 34 | /* Relocation mapping table. */ |
| 35 | static struct |
| 36 | { |
| 37 | const char *name; |
| 38 | enum { both = 0, rel = 1, exec = 2 } appear; |
| 39 | } reloc_map_table[] = |
| 40 | { |
| 41 | [R_X86_64_NONE] = { "R_X86_64_NONE", both }, |
| 42 | [R_X86_64_64] = { "R_X86_64_64", both }, |
| 43 | [R_X86_64_PC32] = { "R_X86_64_PC32", rel }, |
| 44 | [R_X86_64_GOT32] = { "R_X86_64_GOT32", rel }, |
| 45 | [R_X86_64_PLT32] = { "R_X86_64_PLT32", rel }, |
| 46 | [R_X86_64_COPY] = { "R_X86_64_COPY", exec }, |
| 47 | [R_X86_64_GLOB_DAT] = { "R_X86_64_GLOB_DAT", exec }, |
| 48 | [R_X86_64_JUMP_SLOT] = { "R_X86_64_JUMP_SLOT", exec }, |
| 49 | [R_X86_64_RELATIVE] = { "R_X86_64_RELATIVE", exec }, |
| 50 | [R_X86_64_GOTPCREL] = { "R_X86_64_GOTPCREL", exec }, |
| 51 | [R_X86_64_32] = { "R_X86_64_32", both }, |
| 52 | [R_X86_64_32S] = { "R_X86_64_32S", rel }, |
| 53 | [R_X86_64_16] = { "R_X86_64_16", rel }, |
| 54 | [R_X86_64_PC16] = { "R_X86_64_PC16", rel }, |
| 55 | [R_X86_64_8] = { "R_X86_64_8", rel }, |
| 56 | [R_X86_64_PC8] = { "R_X86_64_PC8", rel }, |
| 57 | [R_X86_64_DTPMOD64] = { "R_X86_64_DTPMOD64", rel }, |
| 58 | [R_X86_64_DTPOFF64] = { "R_X86_64_DTPOFF64", rel }, |
| 59 | [R_X86_64_TPOFF64] = { "R_X86_64_TPOFF64", rel }, |
| 60 | [R_X86_64_TLSGD] = { "R_X86_64_TLSGD", rel }, |
| 61 | [R_X86_64_TLSLD] = { "R_X86_64_TLSLD", rel }, |
| 62 | [R_X86_64_DTPOFF32] = { "R_X86_64_DTPOFF32", rel }, |
| 63 | [R_X86_64_GOTTPOFF] = { "R_X86_64_GOTTPOFF", rel }, |
| 64 | [R_X86_64_TPOFF32] = { "R_X86_64_TPOFF32", rel } |
| 65 | }; |
| 66 | |
| 67 | |
| 68 | /* Determine relocation type string for x86-64. */ |
| 69 | const char * |
| 70 | x86_64_reloc_type_name (int type, char *buf __attribute__ ((unused)), |
| 71 | size_t len __attribute__ ((unused))) |
| 72 | { |
| 73 | if (type < 0 || type >= R_X86_64_NUM) |
| 74 | return NULL; |
| 75 | |
| 76 | return reloc_map_table[type].name; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | /* Check for correct relocation type. */ |
| 81 | bool |
| 82 | x86_64_reloc_type_check (int type) |
| 83 | { |
| 84 | return (type >= R_X86_64_NONE && type < R_X86_64_NUM |
| 85 | && reloc_map_table[type].name != NULL) ? true : false; |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /* Check for correct relocation type use. */ |
| 90 | bool |
| 91 | x86_64_reloc_valid_use (Elf *elf, int type) |
| 92 | { |
| 93 | if (type < R_X86_64_NONE || type >= R_X86_64_NUM |
| 94 | || reloc_map_table[type].name == NULL) |
| 95 | return false; |
| 96 | |
| 97 | Elf64_Ehdr *ehdr = elf64_getehdr (elf); |
| 98 | assert (ehdr != NULL); |
| 99 | |
| 100 | if (reloc_map_table[type].appear == rel) |
| 101 | return ehdr->e_type == ET_REL; |
| 102 | |
| 103 | if (reloc_map_table[type].appear == exec) |
| 104 | return ehdr->e_type != ET_REL; |
| 105 | |
| 106 | assert (reloc_map_table[type].appear == both); |
| 107 | return true; |
| 108 | } |
| 109 | |
| 110 | /* Check for the simple reloc types. */ |
| 111 | Elf_Type |
| 112 | x86_64_reloc_simple_type (Elf *elf __attribute__ ((unused)), int type) |
| 113 | { |
| 114 | switch (type) |
| 115 | { |
| 116 | case R_X86_64_64: |
| 117 | return ELF_T_XWORD; |
| 118 | case R_X86_64_32: |
| 119 | return ELF_T_WORD; |
| 120 | case R_X86_64_32S: |
| 121 | return ELF_T_SWORD; |
| 122 | case R_X86_64_16: |
| 123 | return ELF_T_HALF; |
| 124 | case R_X86_64_8: |
| 125 | return ELF_T_BYTE; |
| 126 | default: |
| 127 | return ELF_T_NUM; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | /* Check whether given relocation is a copy relocation. */ |
| 132 | bool |
| 133 | x86_64_copy_reloc_p (int reloc) |
| 134 | { |
| 135 | return reloc == R_X86_64_COPY; |
| 136 | } |