| 1 | // elfcpp_internal.h -- internals for elfcpp -*- C++ -*- |
| 2 | |
| 3 | // Copyright (C) 2006-2019 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of elfcpp. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or |
| 9 | // modify it under the terms of the GNU Library General Public License |
| 10 | // as published by the Free Software Foundation; either version 2, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // In addition to the permissions in the GNU Library General Public |
| 14 | // License, the Free Software Foundation gives you unlimited |
| 15 | // permission to link the compiled version of this file into |
| 16 | // combinations with other programs, and to distribute those |
| 17 | // combinations without any restriction coming from the use of this |
| 18 | // file. (The Library Public License restrictions do apply in other |
| 19 | // respects; for example, they cover modification of the file, and |
| 20 | /// distribution when not linked into a combined executable.) |
| 21 | |
| 22 | // This program is distributed in the hope that it will be useful, but |
| 23 | // WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 25 | // Library General Public License for more details. |
| 26 | |
| 27 | // You should have received a copy of the GNU Library General Public |
| 28 | // License along with this program; if not, write to the Free Software |
| 29 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 30 | // 02110-1301, USA. |
| 31 | |
| 32 | // This is included by elfcpp.h, the external interface, but holds |
| 33 | // information which we want to keep private. |
| 34 | |
| 35 | #ifndef ELFCPP_INTERNAL_H |
| 36 | #define ELFCPP_INTERNAL_H |
| 37 | |
| 38 | namespace elfcpp |
| 39 | { |
| 40 | |
| 41 | namespace internal |
| 42 | { |
| 43 | |
| 44 | // The ELF file header. |
| 45 | |
| 46 | template<int size> |
| 47 | struct Ehdr_data |
| 48 | { |
| 49 | unsigned char e_ident[EI_NIDENT]; |
| 50 | Elf_Half e_type; |
| 51 | Elf_Half e_machine; |
| 52 | Elf_Word e_version; |
| 53 | typename Elf_types<size>::Elf_Addr e_entry; |
| 54 | typename Elf_types<size>::Elf_Off e_phoff; |
| 55 | typename Elf_types<size>::Elf_Off e_shoff; |
| 56 | Elf_Word e_flags; |
| 57 | Elf_Half e_ehsize; |
| 58 | Elf_Half e_phentsize; |
| 59 | Elf_Half e_phnum; |
| 60 | Elf_Half e_shentsize; |
| 61 | Elf_Half e_shnum; |
| 62 | Elf_Half e_shstrndx; |
| 63 | }; |
| 64 | |
| 65 | // An ELF section header. |
| 66 | |
| 67 | template<int size> |
| 68 | struct Shdr_data |
| 69 | { |
| 70 | Elf_Word sh_name; |
| 71 | Elf_Word sh_type; |
| 72 | typename Elf_types<size>::Elf_WXword sh_flags; |
| 73 | typename Elf_types<size>::Elf_Addr sh_addr; |
| 74 | typename Elf_types<size>::Elf_Off sh_offset; |
| 75 | typename Elf_types<size>::Elf_WXword sh_size; |
| 76 | Elf_Word sh_link; |
| 77 | Elf_Word sh_info; |
| 78 | typename Elf_types<size>::Elf_WXword sh_addralign; |
| 79 | typename Elf_types<size>::Elf_WXword sh_entsize; |
| 80 | }; |
| 81 | |
| 82 | // An ELF compression header. |
| 83 | |
| 84 | template<int size> |
| 85 | struct Chdr_data; |
| 86 | |
| 87 | template<> |
| 88 | struct Chdr_data<32> |
| 89 | { |
| 90 | Elf_Word ch_type; |
| 91 | Elf_Word ch_size; |
| 92 | Elf_Word ch_addralign; |
| 93 | }; |
| 94 | |
| 95 | template<> |
| 96 | struct Chdr_data<64> |
| 97 | { |
| 98 | Elf_Word ch_type; |
| 99 | Elf_Word ch_reserved; |
| 100 | Elf_Xword ch_size; |
| 101 | Elf_Xword ch_addralign; |
| 102 | }; |
| 103 | |
| 104 | // An ELF segment header. We use template specialization for the |
| 105 | // 32-bit and 64-bit versions because the fields are in a different |
| 106 | // order. |
| 107 | |
| 108 | template<int size> |
| 109 | struct Phdr_data; |
| 110 | |
| 111 | template<> |
| 112 | struct Phdr_data<32> |
| 113 | { |
| 114 | Elf_Word p_type; |
| 115 | Elf_types<32>::Elf_Off p_offset; |
| 116 | Elf_types<32>::Elf_Addr p_vaddr; |
| 117 | Elf_types<32>::Elf_Addr p_paddr; |
| 118 | Elf_Word p_filesz; |
| 119 | Elf_Word p_memsz; |
| 120 | Elf_Word p_flags; |
| 121 | Elf_Word p_align; |
| 122 | }; |
| 123 | |
| 124 | template<> |
| 125 | struct Phdr_data<64> |
| 126 | { |
| 127 | Elf_Word p_type; |
| 128 | Elf_Word p_flags; |
| 129 | Elf_types<64>::Elf_Off p_offset; |
| 130 | Elf_types<64>::Elf_Addr p_vaddr; |
| 131 | Elf_types<64>::Elf_Addr p_paddr; |
| 132 | Elf_Xword p_filesz; |
| 133 | Elf_Xword p_memsz; |
| 134 | Elf_Xword p_align; |
| 135 | }; |
| 136 | |
| 137 | // An ELF symbol table entry. We use template specialization for the |
| 138 | // 32-bit and 64-bit versions because the fields are in a different |
| 139 | // order. |
| 140 | |
| 141 | template<int size> |
| 142 | struct Sym_data; |
| 143 | |
| 144 | template<> |
| 145 | struct Sym_data<32> |
| 146 | { |
| 147 | Elf_Word st_name; |
| 148 | Elf_types<32>::Elf_Addr st_value; |
| 149 | Elf_Word st_size; |
| 150 | unsigned char st_info; |
| 151 | unsigned char st_other; |
| 152 | Elf_Half st_shndx; |
| 153 | }; |
| 154 | |
| 155 | template<> |
| 156 | struct Sym_data<64> |
| 157 | { |
| 158 | Elf_Word st_name; |
| 159 | unsigned char st_info; |
| 160 | unsigned char st_other; |
| 161 | Elf_Half st_shndx; |
| 162 | Elf_types<64>::Elf_Addr st_value; |
| 163 | Elf_Xword st_size; |
| 164 | }; |
| 165 | |
| 166 | // ELF relocation table entries. |
| 167 | |
| 168 | template<int size> |
| 169 | struct Rel_data |
| 170 | { |
| 171 | typename Elf_types<size>::Elf_Addr r_offset; |
| 172 | typename Elf_types<size>::Elf_WXword r_info; |
| 173 | }; |
| 174 | |
| 175 | template<int size> |
| 176 | struct Rela_data |
| 177 | { |
| 178 | typename Elf_types<size>::Elf_Addr r_offset; |
| 179 | typename Elf_types<size>::Elf_WXword r_info; |
| 180 | typename Elf_types<size>::Elf_Swxword r_addend; |
| 181 | }; |
| 182 | |
| 183 | // MIPS-64 has a non-standard layout for relocations. |
| 184 | |
| 185 | struct Mips64_rel_data |
| 186 | { |
| 187 | Elf_types<64>::Elf_Addr r_offset; |
| 188 | Elf_Word r_sym; |
| 189 | unsigned char r_ssym; |
| 190 | unsigned char r_type3; |
| 191 | unsigned char r_type2; |
| 192 | unsigned char r_type; |
| 193 | }; |
| 194 | |
| 195 | struct Mips64_rela_data |
| 196 | { |
| 197 | Elf_types<64>::Elf_Addr r_offset; |
| 198 | Elf_Word r_sym; |
| 199 | unsigned char r_ssym; |
| 200 | unsigned char r_type3; |
| 201 | unsigned char r_type2; |
| 202 | unsigned char r_type; |
| 203 | Elf_types<64>::Elf_Swxword r_addend; |
| 204 | }; |
| 205 | |
| 206 | // An entry in the ELF SHT_DYNAMIC section aka PT_DYNAMIC segment. |
| 207 | |
| 208 | template<int size> |
| 209 | struct Dyn_data |
| 210 | { |
| 211 | typename Elf_types<size>::Elf_Swxword d_tag; |
| 212 | typename Elf_types<size>::Elf_WXword d_val; |
| 213 | }; |
| 214 | |
| 215 | // An entry in a SHT_GNU_verdef section. This structure is the same |
| 216 | // in 32-bit and 64-bit ELF files. |
| 217 | |
| 218 | struct Verdef_data |
| 219 | { |
| 220 | // Version number of structure (VER_DEF_*). |
| 221 | Elf_Half vd_version; |
| 222 | // Bit flags (VER_FLG_*). |
| 223 | Elf_Half vd_flags; |
| 224 | // Version index. |
| 225 | Elf_Half vd_ndx; |
| 226 | // Number of auxiliary Verdaux entries. |
| 227 | Elf_Half vd_cnt; |
| 228 | // Hash of name. |
| 229 | Elf_Word vd_hash; |
| 230 | // Byte offset to first Verdaux entry. |
| 231 | Elf_Word vd_aux; |
| 232 | // Byte offset to next Verdef entry. |
| 233 | Elf_Word vd_next; |
| 234 | }; |
| 235 | |
| 236 | // An auxiliary entry in a SHT_GNU_verdef section. This structure is |
| 237 | // the same in 32-bit and 64-bit ELF files. |
| 238 | |
| 239 | struct Verdaux_data |
| 240 | { |
| 241 | // Offset in string table of version name. |
| 242 | Elf_Word vda_name; |
| 243 | // Byte offset to next Verdaux entry. |
| 244 | Elf_Word vda_next; |
| 245 | }; |
| 246 | |
| 247 | // An entry in a SHT_GNU_verneed section. This structure is the same |
| 248 | // in 32-bit and 64-bit ELF files. |
| 249 | |
| 250 | struct Verneed_data |
| 251 | { |
| 252 | // Version number of structure (VER_NEED_*). |
| 253 | Elf_Half vn_version; |
| 254 | // Number of auxiliary Vernaux entries. |
| 255 | Elf_Half vn_cnt; |
| 256 | // Offset in string table of library name. |
| 257 | Elf_Word vn_file; |
| 258 | // Byte offset to first Vernaux entry. |
| 259 | Elf_Word vn_aux; |
| 260 | // Byt eoffset to next Verneed entry. |
| 261 | Elf_Word vn_next; |
| 262 | }; |
| 263 | |
| 264 | // An auxiliary entry in a SHT_GNU_verneed section. This structure is |
| 265 | // the same in 32-bit and 64-bit ELF files. |
| 266 | |
| 267 | struct Vernaux_data |
| 268 | { |
| 269 | // Hash of dependency name. |
| 270 | Elf_Word vna_hash; |
| 271 | // Bit flags (VER_FLG_*). |
| 272 | Elf_Half vna_flags; |
| 273 | // Version index used in SHT_GNU_versym entries. |
| 274 | Elf_Half vna_other; |
| 275 | // Offset in string table of version name. |
| 276 | Elf_Word vna_name; |
| 277 | // Byte offset to next Vernaux entry. |
| 278 | Elf_Word vna_next; |
| 279 | }; |
| 280 | |
| 281 | } // End namespace internal. |
| 282 | |
| 283 | } // End namespace elfcpp. |
| 284 | |
| 285 | #endif // !defined(ELFCPP_INTERNAL_H) |