1 /* ELF support for BFD. 2 Copyright 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2001 3 Free Software Foundation, Inc. 4 5 Written by Fred Fish @ Cygnus Support, from information published 6 in "UNIX System V Release 4, Programmers Guide: ANSI C and 7 Programming Support Tools". 8 9 This file is part of BFD, the Binary File Descriptor library. 10 11 This program is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 2 of the License, or 14 (at your option) any later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software 23 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 24 25 26 /* This file is part of ELF support for BFD, and contains the portions 27 that describe how ELF is represented externally by the BFD library. 28 I.E. it describes the in-file representation of ELF. It requires 29 the elf/common.h file which contains the portions that are common to 30 both the internal and external representations. */ 31 32 /* The 64-bit stuff is kind of random. Perhaps someone will publish a 33 spec someday. */ 34 35 #ifndef _ELF_EXTERNAL_H 36 #define _ELF_EXTERNAL_H 37 38 /* ELF Header (32-bit implementations) */ 39 40 typedef struct { 41 unsigned char e_ident[16]; /* ELF "magic number" */ 42 unsigned char e_type[2]; /* Identifies object file type */ 43 unsigned char e_machine[2]; /* Specifies required architecture */ 44 unsigned char e_version[4]; /* Identifies object file version */ 45 unsigned char e_entry[4]; /* Entry point virtual address */ 46 unsigned char e_phoff[4]; /* Program header table file offset */ 47 unsigned char e_shoff[4]; /* Section header table file offset */ 48 unsigned char e_flags[4]; /* Processor-specific flags */ 49 unsigned char e_ehsize[2]; /* ELF header size in bytes */ 50 unsigned char e_phentsize[2]; /* Program header table entry size */ 51 unsigned char e_phnum[2]; /* Program header table entry count */ 52 unsigned char e_shentsize[2]; /* Section header table entry size */ 53 unsigned char e_shnum[2]; /* Section header table entry count */ 54 unsigned char e_shstrndx[2]; /* Section header string table index */ 55 } Elf32_External_Ehdr; 56 57 typedef struct { 58 unsigned char e_ident[16]; /* ELF "magic number" */ 59 unsigned char e_type[2]; /* Identifies object file type */ 60 unsigned char e_machine[2]; /* Specifies required architecture */ 61 unsigned char e_version[4]; /* Identifies object file version */ 62 unsigned char e_entry[8]; /* Entry point virtual address */ 63 unsigned char e_phoff[8]; /* Program header table file offset */ 64 unsigned char e_shoff[8]; /* Section header table file offset */ 65 unsigned char e_flags[4]; /* Processor-specific flags */ 66 unsigned char e_ehsize[2]; /* ELF header size in bytes */ 67 unsigned char e_phentsize[2]; /* Program header table entry size */ 68 unsigned char e_phnum[2]; /* Program header table entry count */ 69 unsigned char e_shentsize[2]; /* Section header table entry size */ 70 unsigned char e_shnum[2]; /* Section header table entry count */ 71 unsigned char e_shstrndx[2]; /* Section header string table index */ 72 } Elf64_External_Ehdr; 73 74 /* Program header */ 75 76 typedef struct { 77 unsigned char p_type[4]; /* Identifies program segment type */ 78 unsigned char p_offset[4]; /* Segment file offset */ 79 unsigned char p_vaddr[4]; /* Segment virtual address */ 80 unsigned char p_paddr[4]; /* Segment physical address */ 81 unsigned char p_filesz[4]; /* Segment size in file */ 82 unsigned char p_memsz[4]; /* Segment size in memory */ 83 unsigned char p_flags[4]; /* Segment flags */ 84 unsigned char p_align[4]; /* Segment alignment, file & memory */ 85 } Elf32_External_Phdr; 86 87 typedef struct { 88 unsigned char p_type[4]; /* Identifies program segment type */ 89 unsigned char p_flags[4]; /* Segment flags */ 90 unsigned char p_offset[8]; /* Segment file offset */ 91 unsigned char p_vaddr[8]; /* Segment virtual address */ 92 unsigned char p_paddr[8]; /* Segment physical address */ 93 unsigned char p_filesz[8]; /* Segment size in file */ 94 unsigned char p_memsz[8]; /* Segment size in memory */ 95 unsigned char p_align[8]; /* Segment alignment, file & memory */ 96 } Elf64_External_Phdr; 97 98 /* Section header */ 99 100 typedef struct { 101 unsigned char sh_name[4]; /* Section name, index in string tbl */ 102 unsigned char sh_type[4]; /* Type of section */ 103 unsigned char sh_flags[4]; /* Miscellaneous section attributes */ 104 unsigned char sh_addr[4]; /* Section virtual addr at execution */ 105 unsigned char sh_offset[4]; /* Section file offset */ 106 unsigned char sh_size[4]; /* Size of section in bytes */ 107 unsigned char sh_link[4]; /* Index of another section */ 108 unsigned char sh_info[4]; /* Additional section information */ 109 unsigned char sh_addralign[4]; /* Section alignment */ 110 unsigned char sh_entsize[4]; /* Entry size if section holds table */ 111 } Elf32_External_Shdr; 112 113 typedef struct { 114 unsigned char sh_name[4]; /* Section name, index in string tbl */ 115 unsigned char sh_type[4]; /* Type of section */ 116 unsigned char sh_flags[8]; /* Miscellaneous section attributes */ 117 unsigned char sh_addr[8]; /* Section virtual addr at execution */ 118 unsigned char sh_offset[8]; /* Section file offset */ 119 unsigned char sh_size[8]; /* Size of section in bytes */ 120 unsigned char sh_link[4]; /* Index of another section */ 121 unsigned char sh_info[4]; /* Additional section information */ 122 unsigned char sh_addralign[8]; /* Section alignment */ 123 unsigned char sh_entsize[8]; /* Entry size if section holds table */ 124 } Elf64_External_Shdr; 125 126 /* Symbol table entry */ 127 128 typedef struct { 129 unsigned char st_name[4]; /* Symbol name, index in string tbl */ 130 unsigned char st_value[4]; /* Value of the symbol */ 131 unsigned char st_size[4]; /* Associated symbol size */ 132 unsigned char st_info[1]; /* Type and binding attributes */ 133 unsigned char st_other[1]; /* No defined meaning, 0 */ 134 unsigned char st_shndx[2]; /* Associated section index */ 135 } Elf32_External_Sym; 136 137 typedef struct { 138 unsigned char st_name[4]; /* Symbol name, index in string tbl */ 139 unsigned char st_info[1]; /* Type and binding attributes */ 140 unsigned char st_other[1]; /* No defined meaning, 0 */ 141 unsigned char st_shndx[2]; /* Associated section index */ 142 unsigned char st_value[8]; /* Value of the symbol */ 143 unsigned char st_size[8]; /* Associated symbol size */ 144 } Elf64_External_Sym; 145 146 typedef struct { 147 unsigned char est_shndx[4]; /* Section index */ 148 } Elf_External_Sym_Shndx; 149 150 /* Note segments */ 151 152 typedef struct { 153 unsigned char namesz[4]; /* Size of entry's owner string */ 154 unsigned char descsz[4]; /* Size of the note descriptor */ 155 unsigned char type[4]; /* Interpretation of the descriptor */ 156 char name[1]; /* Start of the name+desc data */ 157 } Elf_External_Note; 158 159 /* Relocation Entries */ 160 typedef struct { 161 unsigned char r_offset[4]; /* Location at which to apply the action */ 162 unsigned char r_info[4]; /* index and type of relocation */ 163 } Elf32_External_Rel; 164 165 typedef struct { 166 unsigned char r_offset[4]; /* Location at which to apply the action */ 167 unsigned char r_info[4]; /* index and type of relocation */ 168 unsigned char r_addend[4]; /* Constant addend used to compute value */ 169 } Elf32_External_Rela; 170 171 typedef struct { 172 unsigned char r_offset[8]; /* Location at which to apply the action */ 173 unsigned char r_info[8]; /* index and type of relocation */ 174 } Elf64_External_Rel; 175 176 typedef struct { 177 unsigned char r_offset[8]; /* Location at which to apply the action */ 178 unsigned char r_info[8]; /* index and type of relocation */ 179 unsigned char r_addend[8]; /* Constant addend used to compute value */ 180 } Elf64_External_Rela; 181 182 /* dynamic section structure */ 183 184 typedef struct { 185 unsigned char d_tag[4]; /* entry tag value */ 186 union { 187 unsigned char d_val[4]; 188 unsigned char d_ptr[4]; 189 } d_un; 190 } Elf32_External_Dyn; 191 192 typedef struct { 193 unsigned char d_tag[8]; /* entry tag value */ 194 union { 195 unsigned char d_val[8]; 196 unsigned char d_ptr[8]; 197 } d_un; 198 } Elf64_External_Dyn; 199 200 /* The version structures are currently size independent. They are 201 named without a 32 or 64. If that ever changes, these structures 202 will need to be renamed. */ 203 204 /* This structure appears in a SHT_GNU_verdef section. */ 205 206 typedef struct { 207 unsigned char vd_version[2]; 208 unsigned char vd_flags[2]; 209 unsigned char vd_ndx[2]; 210 unsigned char vd_cnt[2]; 211 unsigned char vd_hash[4]; 212 unsigned char vd_aux[4]; 213 unsigned char vd_next[4]; 214 } Elf_External_Verdef; 215 216 /* This structure appears in a SHT_GNU_verdef section. */ 217 218 typedef struct { 219 unsigned char vda_name[4]; 220 unsigned char vda_next[4]; 221 } Elf_External_Verdaux; 222 223 /* This structure appears in a SHT_GNU_verneed section. */ 224 225 typedef struct { 226 unsigned char vn_version[2]; 227 unsigned char vn_cnt[2]; 228 unsigned char vn_file[4]; 229 unsigned char vn_aux[4]; 230 unsigned char vn_next[4]; 231 } Elf_External_Verneed; 232 233 /* This structure appears in a SHT_GNU_verneed section. */ 234 235 typedef struct { 236 unsigned char vna_hash[4]; 237 unsigned char vna_flags[2]; 238 unsigned char vna_other[2]; 239 unsigned char vna_name[4]; 240 unsigned char vna_next[4]; 241 } Elf_External_Vernaux; 242 243 /* This structure appears in a SHT_GNU_versym section. This is not a 244 standard ELF structure; ELF just uses Elf32_Half. */ 245 246 typedef struct { 247 unsigned char vs_vers[2]; 248 } 249 #ifdef __GNUC__ 250 __attribute__ ((packed)) 251 #endif 252 Elf_External_Versym; 253 254 /* Structure for syminfo section. */ 255 typedef struct 256 { 257 unsigned char si_boundto[2]; 258 unsigned char si_flags[2]; 259 } Elf_External_Syminfo; 260 261 262 /* This structure appears on the stack and in NT_AUXV core file notes. */ 263 typedef struct 264 { 265 unsigned char a_type[4]; 266 unsigned char a_val[4]; 267 } Elf32_External_Auxv; 268 269 typedef struct 270 { 271 unsigned char a_type[8]; 272 unsigned char a_val[8]; 273 } Elf64_External_Auxv; 274 275 276 #endif /* _ELF_EXTERNAL_H */ 277