1 /* i386 specific symbolic name handling. 2 Copyright (C) 2000, 2001, 2002 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2000. 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_i386.h> 24 25 26 /* Return of the backend. */ 27 const char * 28 i386_backend_name (void) 29 { 30 return "i386"; 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_386_NONE] = { "R_386_NONE", both }, 42 [R_386_32] = { "R_386_32", both }, 43 [R_386_PC32] = { "R_386_PC32", rel }, 44 [R_386_GOT32] = { "R_386_GOT32", rel }, 45 [R_386_PLT32] = { "R_386_PLT32", rel }, 46 [R_386_COPY] = { "R_386_COPY", exec }, 47 [R_386_GLOB_DAT] = { "R_386_GLOB_DAT", exec }, 48 [R_386_JMP_SLOT] = { "R_386_JMP_SLOT", exec }, 49 [R_386_RELATIVE] = { "R_386_RELATIVE", exec }, 50 [R_386_GOTOFF] = { "R_386_GOTOFF", rel }, 51 [R_386_GOTPC] = { "R_386_GOTPC", rel }, 52 [R_386_32PLT] = { "R_386_32PLT", rel }, 53 [R_386_TLS_TPOFF] = { "R_386_TLS_TPOFF", rel }, 54 [R_386_TLS_IE] = { "R_386_TLS_IE", rel }, 55 [R_386_TLS_GOTIE] = { "R_386_TLS_GOTIE", rel }, 56 [R_386_TLS_LE] = { "R_386_TLS_LE", rel }, 57 [R_386_TLS_GD] = { "R_386_TLS_GD", rel }, 58 [R_386_TLS_LDM] = { "R_386_TLS_LDM", rel }, 59 [R_386_16] = { "R_386_16", rel }, 60 [R_386_PC16] = { "R_386_PC16", rel }, 61 [R_386_8] = { "R_386_8", rel }, 62 [R_386_PC8] = { "R_386_PC8", rel }, 63 [R_386_TLS_GD_32] = { "R_386_TLS_GD_32", rel }, 64 [R_386_TLS_GD_PUSH] = { "R_386_TLS_GD_PUSH", rel }, 65 [R_386_TLS_GD_CALL] = { "R_386_TLS_GD_CALL", rel }, 66 [R_386_TLS_GD_POP] = { "R_386_TLS_GD_POP", rel }, 67 [R_386_TLS_LDM_32] = { "R_386_TLS_LDM_32", rel }, 68 [R_386_TLS_LDM_PUSH] = { "R_386_TLS_LDM_PUSH", rel }, 69 [R_386_TLS_LDM_CALL] = { "R_386_TLS_LDM_CALL", rel }, 70 [R_386_TLS_LDM_POP] = { "R_386_TLS_LDM_POP", rel }, 71 [R_386_TLS_LDO_32] = { "R_386_TLS_LDO_32", rel }, 72 [R_386_TLS_IE_32] = { "R_386_TLS_IE_32", rel }, 73 [R_386_TLS_LE_32] = { "R_386_TLS_LE_32", rel }, 74 [R_386_TLS_DTPMOD32] = { "R_386_TLS_DTPMOD32", rel }, 75 [R_386_TLS_DTPOFF32] = { "R_386_TLS_DTPOFF32", rel }, 76 [R_386_TLS_TPOFF32] = { "R_386_TLS_TPOFF32", rel } 77 }; 78 79 80 /* Determine relocation type string for x86. */ 81 const char * 82 i386_reloc_type_name (int type, char *buf, size_t len) 83 { 84 if (type < 0 || type >= R_386_NUM) 85 return NULL; 86 87 return reloc_map_table[type].name; 88 } 89 90 91 /* Check for correct relocation type. */ 92 bool 93 i386_reloc_type_check (int type) 94 { 95 return (type >= R_386_NONE && type < R_386_NUM 96 && reloc_map_table[type].name != NULL) ? true : false; 97 } 98 99 100 /* Check for correct relocation type use. */ 101 bool 102 i386_reloc_valid_use (Elf *elf, int type) 103 { 104 if (type < R_386_NONE || type >= R_386_NUM 105 || reloc_map_table[type].name == NULL) 106 return false; 107 108 Elf32_Ehdr *ehdr = elf32_getehdr (elf); 109 assert (ehdr != NULL); 110 111 if (reloc_map_table[type].appear == rel) 112 return ehdr->e_type == ET_REL; 113 114 if (reloc_map_table[type].appear == exec) 115 return ehdr->e_type != ET_REL; 116 117 assert (reloc_map_table[type].appear == both); 118 return true; 119 } 120 121 122 /* Return true if the symbol type is that referencing the GOT. */ 123 bool 124 i386_gotpc_reloc_check (Elf *elf, int type) 125 { 126 return type == R_386_GOTPC; 127 } 128
