1 /* 2 * Copyright (c) 1995, 1996, 2001, 2002 3 * Erik Theisen. All rights reserved. 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 /* 9 * This is the ELF ABI header file 10 * formerly known as "elf_abi.h". 11 */ 12 13 #ifndef _ELF_H 14 #define _ELF_H 15 16 #include "compiler.h" 17 18 /* 19 * This version doesn't work for 64-bit ABIs - Erik. 20 */ 21 22 /* 23 * These typedefs need to be handled better. 24 */ 25 typedef uint32_t Elf32_Addr; /* Unsigned program address */ 26 typedef uint32_t Elf32_Off; /* Unsigned file offset */ 27 typedef int32_t Elf32_Sword; /* Signed large integer */ 28 typedef uint32_t Elf32_Word; /* Unsigned large integer */ 29 typedef uint16_t Elf32_Half; /* Unsigned medium integer */ 30 31 /* 64-bit ELF base types. */ 32 typedef uint64_t Elf64_Addr; 33 typedef uint16_t Elf64_Half; 34 typedef int16_t Elf64_SHalf; 35 typedef uint64_t Elf64_Off; 36 typedef int32_t Elf64_Sword; 37 typedef uint32_t Elf64_Word; 38 typedef uint64_t Elf64_Xword; 39 typedef int64_t Elf64_Sxword; 40 41 /* e_ident[] identification indexes */ 42 #define EI_MAG0 0 /* file ID */ 43 #define EI_MAG1 1 /* file ID */ 44 #define EI_MAG2 2 /* file ID */ 45 #define EI_MAG3 3 /* file ID */ 46 #define EI_CLASS 4 /* file class */ 47 #define EI_DATA 5 /* data encoding */ 48 #define EI_VERSION 6 /* ELF header version */ 49 #define EI_OSABI 7 /* OS/ABI specific ELF extensions */ 50 #define EI_ABIVERSION 8 /* ABI target version */ 51 #define EI_PAD 9 /* start of pad bytes */ 52 #define EI_NIDENT 16 /* Size of e_ident[] */ 53 54 /* e_ident[] magic number */ 55 #define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ 56 #define ELFMAG1 'E' /* e_ident[EI_MAG1] */ 57 #define ELFMAG2 'L' /* e_ident[EI_MAG2] */ 58 #define ELFMAG3 'F' /* e_ident[EI_MAG3] */ 59 #define ELFMAG "\177ELF" /* magic */ 60 #define SELFMAG 4 /* size of magic */ 61 62 /* e_ident[] file class */ 63 #define ELFCLASSNONE 0 /* invalid */ 64 #define ELFCLASS32 1 /* 32-bit objs */ 65 #define ELFCLASS64 2 /* 64-bit objs */ 66 #define ELFCLASSNUM 3 /* number of classes */ 67 68 /* e_ident[] data encoding */ 69 #define ELFDATANONE 0 /* invalid */ 70 #define ELFDATA2LSB 1 /* Little-Endian */ 71 #define ELFDATA2MSB 2 /* Big-Endian */ 72 #define ELFDATANUM 3 /* number of data encode defines */ 73 74 /* e_ident[] OS/ABI specific ELF extensions */ 75 #define ELFOSABI_NONE 0 /* No extension specified */ 76 #define ELFOSABI_HPUX 1 /* Hewlett-Packard HP-UX */ 77 #define ELFOSABI_NETBSD 2 /* NetBSD */ 78 #define ELFOSABI_LINUX 3 /* Linux */ 79 #define ELFOSABI_SOLARIS 6 /* Sun Solaris */ 80 #define ELFOSABI_AIX 7 /* AIX */ 81 #define ELFOSABI_IRIX 8 /* IRIX */ 82 #define ELFOSABI_FREEBSD 9 /* FreeBSD */ 83 #define ELFOSABI_TRU64 10 /* Compaq TRU64 UNIX */ 84 #define ELFOSABI_MODESTO 11 /* Novell Modesto */ 85 #define ELFOSABI_OPENBSD 12 /* OpenBSD */ 86 /* 64-255 Architecture-specific value range */ 87 88 /* e_ident[] ABI Version */ 89 #define ELFABIVERSION 0 90 91 /* e_ident */ 92 #define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ 93 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ 94 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ 95 (ehdr).e_ident[EI_MAG3] == ELFMAG3) 96 97 /* ELF Header */ 98 typedef struct elfhdr{ 99 unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ 100 Elf32_Half e_type; /* object file type */ 101 Elf32_Half e_machine; /* machine */ 102 Elf32_Word e_version; /* object file version */ 103 Elf32_Addr e_entry; /* virtual entry point */ 104 Elf32_Off e_phoff; /* program header table offset */ 105 Elf32_Off e_shoff; /* section header table offset */ 106 Elf32_Word e_flags; /* processor-specific flags */ 107 Elf32_Half e_ehsize; /* ELF header size */ 108 Elf32_Half e_phentsize; /* program header entry size */ 109 Elf32_Half e_phnum; /* number of program header entries */ 110 Elf32_Half e_shentsize; /* section header entry size */ 111 Elf32_Half e_shnum; /* number of section header entries */ 112 Elf32_Half e_shstrndx; /* section header table's "section 113 header string table" entry offset */ 114 } Elf32_Ehdr; 115 116 /* e_type */ 117 #define ET_NONE 0 /* No file type */ 118 #define ET_REL 1 /* relocatable file */ 119 #define ET_EXEC 2 /* executable file */ 120 #define ET_DYN 3 /* shared object file */ 121 #define ET_CORE 4 /* core file */ 122 #define ET_NUM 5 /* number of types */ 123 #define ET_LOOS 0xfe00 /* reserved range for operating */ 124 #define ET_HIOS 0xfeff /* system specific e_type */ 125 #define ET_LOPROC 0xff00 /* reserved range for processor */ 126 #define ET_HIPROC 0xffff /* specific e_type */ 127 128 /* e_machine */ 129 #define EM_NONE 0 /* No Machine */ 130 #define EM_M32 1 /* AT&T WE 32100 */ 131 #define EM_SPARC 2 /* SPARC */ 132 #define EM_386 3 /* Intel 80386 */ 133 #define EM_68K 4 /* Motorola 68000 */ 134 #define EM_88K 5 /* Motorola 88000 */ 135 #if 0 136 #define EM_486 6 /* RESERVED - was Intel 80486 */ 137 #endif 138 #define EM_860 7 /* Intel 80860 */ 139 #define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ 140 #define EM_S370 9 /* IBM System/370 Processor */ 141 #define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ 142 #if 0 143 #define EM_SPARC64 11 /* RESERVED - was SPARC v9 144 64-bit unoffical */ 145 #endif 146 /* RESERVED 11-14 for future use */ 147 #define EM_PARISC 15 /* HPPA */ 148 /* RESERVED 16 for future use */ 149 #define EM_VPP500 17 /* Fujitsu VPP500 */ 150 #define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ 151 #define EM_960 19 /* Intel 80960 */ 152 #define EM_PPC 20 /* PowerPC */ 153 #define EM_PPC64 21 /* 64-bit PowerPC */ 154 #define EM_S390 22 /* IBM System/390 Processor */ 155 /* RESERVED 23-35 for future use */ 156 #define EM_V800 36 /* NEC V800 */ 157 #define EM_FR20 37 /* Fujitsu FR20 */ 158 #define EM_RH32 38 /* TRW RH-32 */ 159 #define EM_RCE 39 /* Motorola RCE */ 160 #define EM_ARM 40 /* Advanced Risc Machines ARM */ 161 #define EM_ALPHA 41 /* Digital Alpha */ 162 #define EM_SH 42 /* Hitachi SH */ 163 #define EM_SPARCV9 43 /* SPARC Version 9 */ 164 #define EM_TRICORE 44 /* Siemens TriCore embedded processor */ 165 #define EM_ARC 45 /* Argonaut RISC Core */ 166 #define EM_H8_300 46 /* Hitachi H8/300 */ 167 #define EM_H8_300H 47 /* Hitachi H8/300H */ 168 #define EM_H8S 48 /* Hitachi H8S */ 169 #define EM_H8_500 49 /* Hitachi H8/500 */ 170 #define EM_IA_64 50 /* Intel Merced */ 171 #define EM_MIPS_X 51 /* Stanford MIPS-X */ 172 #define EM_COLDFIRE 52 /* Motorola Coldfire */ 173 #define EM_68HC12 53 /* Motorola M68HC12 */ 174 #define EM_MMA 54 /* Fujitsu MMA Multimedia Accelerator*/ 175 #define EM_PCP 55 /* Siemens PCP */ 176 #define EM_NCPU 56 /* Sony nCPU embeeded RISC */ 177 #define EM_NDR1 57 /* Denso NDR1 microprocessor */ 178 #define EM_STARCORE 58 /* Motorola Start*Core processor */ 179 #define EM_ME16 59 /* Toyota ME16 processor */ 180 #define EM_ST100 60 /* STMicroelectronic ST100 processor */ 181 #define EM_TINYJ 61 /* Advanced Logic Corp. Tinyj emb.fam*/ 182 #define EM_X86_64 62 /* AMD x86-64 */ 183 #define EM_PDSP 63 /* Sony DSP Processor */ 184 /* RESERVED 64,65 for future use */ 185 #define EM_FX66 66 /* Siemens FX66 microcontroller */ 186 #define EM_ST9PLUS 67 /* STMicroelectronics ST9+ 8/16 mc */ 187 #define EM_ST7 68 /* STmicroelectronics ST7 8 bit mc */ 188 #define EM_68HC16 69 /* Motorola MC68HC16 microcontroller */ 189 #define EM_68HC11 70 /* Motorola MC68HC11 microcontroller */ 190 #define EM_68HC08 71 /* Motorola MC68HC08 microcontroller */ 191 #define EM_68HC05 72 /* Motorola MC68HC05 microcontroller */ 192 #define EM_SVX 73 /* Silicon Graphics SVx */ 193 #define EM_ST19 74 /* STMicroelectronics ST19 8 bit mc */ 194 #define EM_VAX 75 /* Digital VAX */ 195 #define EM_CHRIS 76 /* Axis Communications embedded proc. */ 196 #define EM_JAVELIN 77 /* Infineon Technologies emb. proc. */ 197 #define EM_FIREPATH 78 /* Element 14 64-bit DSP Processor */ 198 #define EM_ZSP 79 /* LSI Logic 16-bit DSP Processor */ 199 #define EM_MMIX 80 /* Donald Knuth's edu 64-bit proc. */ 200 #define EM_HUANY 81 /* Harvard University mach-indep objs */ 201 #define EM_PRISM 82 /* SiTera Prism */ 202 #define EM_AVR 83 /* Atmel AVR 8-bit microcontroller */ 203 #define EM_FR30 84 /* Fujitsu FR30 */ 204 #define EM_D10V 85 /* Mitsubishi DV10V */ 205 #define EM_D30V 86 /* Mitsubishi DV30V */ 206 #define EM_V850 87 /* NEC v850 */ 207 #define EM_M32R 88 /* Mitsubishi M32R */ 208 #define EM_MN10300 89 /* Matsushita MN10200 */ 209 #define EM_MN10200 90 /* Matsushita MN10200 */ 210 #define EM_PJ 91 /* picoJava */ 211 #define EM_NUM 92 /* number of machine types */ 212 213 /* Version */ 214 #define EV_NONE 0 /* Invalid */ 215 #define EV_CURRENT 1 /* Current */ 216 #define EV_NUM 2 /* number of versions */ 217 218 /* Section Header */ 219 typedef struct { 220 Elf32_Word sh_name; /* name - index into section header 221 string table section */ 222 Elf32_Word sh_type; /* type */ 223 Elf32_Word sh_flags; /* flags */ 224 Elf32_Addr sh_addr; /* address */ 225 Elf32_Off sh_offset; /* file offset */ 226 Elf32_Word sh_size; /* section size */ 227 Elf32_Word sh_link; /* section header table index link */ 228 Elf32_Word sh_info; /* extra information */ 229 Elf32_Word sh_addralign; /* address alignment */ 230 Elf32_Word sh_entsize; /* section entry size */ 231 } Elf32_Shdr; 232 233 /* Special Section Indexes */ 234 #define SHN_UNDEF 0 /* undefined */ 235 #define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */ 236 #define SHN_LOPROC 0xff00 /* reserved range for processor */ 237 #define SHN_HIPROC 0xff1f /* specific section indexes */ 238 #define SHN_LOOS 0xff20 /* reserved range for operating */ 239 #define SHN_HIOS 0xff3f /* specific semantics */ 240 #define SHN_ABS 0xfff1 /* absolute value */ 241 #define SHN_COMMON 0xfff2 /* common symbol */ 242 #define SHN_XINDEX 0xffff /* Index is an extra table */ 243 #define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */ 244 245 /* sh_type */ 246 #define SHT_NULL 0 /* inactive */ 247 #define SHT_PROGBITS 1 /* program defined information */ 248 #define SHT_SYMTAB 2 /* symbol table section */ 249 #define SHT_STRTAB 3 /* string table section */ 250 #define SHT_RELA 4 /* relocation section with addends*/ 251 #define SHT_HASH 5 /* symbol hash table section */ 252 #define SHT_DYNAMIC 6 /* dynamic section */ 253 #define SHT_NOTE 7 /* note section */ 254 #define SHT_NOBITS 8 /* no space section */ 255 #define SHT_REL 9 /* relation section without addends */ 256 #define SHT_SHLIB 10 /* reserved - purpose unknown */ 257 #define SHT_DYNSYM 11 /* dynamic symbol table section */ 258 #define SHT_INIT_ARRAY 14 /* Array of constructors */ 259 #define SHT_FINI_ARRAY 15 /* Array of destructors */ 260 #define SHT_PREINIT_ARRAY 16 /* Array of pre-constructors */ 261 #define SHT_GROUP 17 /* Section group */ 262 #define SHT_SYMTAB_SHNDX 18 /* Extended section indeces */ 263 #define SHT_NUM 19 /* number of section types */ 264 #define SHT_LOOS 0x60000000 /* Start OS-specific */ 265 #define SHT_HIOS 0x6fffffff /* End OS-specific */ 266 #define SHT_LOPROC 0x70000000 /* reserved range for processor */ 267 #define SHT_HIPROC 0x7fffffff /* specific section header types */ 268 #define SHT_LOUSER 0x80000000 /* reserved range for application */ 269 #define SHT_HIUSER 0xffffffff /* specific indexes */ 270 271 /* Section names */ 272 #define ELF_BSS ".bss" /* uninitialized data */ 273 #define ELF_COMMENT ".comment" /* version control information */ 274 #define ELF_DATA ".data" /* initialized data */ 275 #define ELF_DATA1 ".data1" /* initialized data */ 276 #define ELF_DEBUG ".debug" /* debug */ 277 #define ELF_DYNAMIC ".dynamic" /* dynamic linking information */ 278 #define ELF_DYNSTR ".dynstr" /* dynamic string table */ 279 #define ELF_DYNSYM ".dynsym" /* dynamic symbol table */ 280 #define ELF_FINI ".fini" /* termination code */ 281 #define ELF_FINI_ARRAY ".fini_array" /* Array of destructors */ 282 #define ELF_GOT ".got" /* global offset table */ 283 #define ELF_HASH ".hash" /* symbol hash table */ 284 #define ELF_INIT ".init" /* initialization code */ 285 #define ELF_INIT_ARRAY ".init_array" /* Array of constuctors */ 286 #define ELF_INTERP ".interp" /* Pathname of program interpreter */ 287 #define ELF_LINE ".line" /* Symbolic line numnber information */ 288 #define ELF_NOTE ".note" /* Contains note section */ 289 #define ELF_PLT ".plt" /* Procedure linkage table */ 290 #define ELF_PREINIT_ARRAY ".preinit_array" /* Array of pre-constructors */ 291 #define ELF_REL_DATA ".rel.data" /* relocation data */ 292 #define ELF_REL_FINI ".rel.fini" /* relocation termination code */ 293 #define ELF_REL_INIT ".rel.init" /* relocation initialization code */ 294 #define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */ 295 #define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */ 296 #define ELF_REL_TEXT ".rel.text" /* relocation code */ 297 #define ELF_RODATA ".rodata" /* read-only data */ 298 #define ELF_RODATA1 ".rodata1" /* read-only data */ 299 #define ELF_SHSTRTAB ".shstrtab" /* section header string table */ 300 #define ELF_STRTAB ".strtab" /* string table */ 301 #define ELF_SYMTAB ".symtab" /* symbol table */ 302 #define ELF_SYMTAB_SHNDX ".symtab_shndx"/* symbol table section index */ 303 #define ELF_TBSS ".tbss" /* thread local uninit data */ 304 #define ELF_TDATA ".tdata" /* thread local init data */ 305 #define ELF_TDATA1 ".tdata1" /* thread local init data */ 306 #define ELF_TEXT ".text" /* code */ 307 308 /* Section Attribute Flags - sh_flags */ 309 #define SHF_WRITE 0x1 /* Writable */ 310 #define SHF_ALLOC 0x2 /* occupies memory */ 311 #define SHF_EXECINSTR 0x4 /* executable */ 312 #define SHF_MERGE 0x10 /* Might be merged */ 313 #define SHF_STRINGS 0x20 /* Contains NULL terminated strings */ 314 #define SHF_INFO_LINK 0x40 /* sh_info contains SHT index */ 315 #define SHF_LINK_ORDER 0x80 /* Preserve order after combining*/ 316 #define SHF_OS_NONCONFORMING 0x100 /* Non-standard OS specific handling */ 317 #define SHF_GROUP 0x200 /* Member of section group */ 318 #define SHF_TLS 0x400 /* Thread local storage */ 319 #define SHF_MASKOS 0x0ff00000 /* OS specific */ 320 #define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */ 321 /* specific section attributes */ 322 323 /* Section Group Flags */ 324 #define GRP_COMDAT 0x1 /* COMDAT group */ 325 #define GRP_MASKOS 0x0ff00000 /* Mask OS specific flags */ 326 #define GRP_MASKPROC 0xf0000000 /* Mask processor specific flags */ 327 328 /* Symbol Table Entry */ 329 typedef struct elf32_sym { 330 Elf32_Word st_name; /* name - index into string table */ 331 Elf32_Addr st_value; /* symbol value */ 332 Elf32_Word st_size; /* symbol size */ 333 unsigned char st_info; /* type and binding */ 334 unsigned char st_other; /* 0 - no defined meaning */ 335 Elf32_Half st_shndx; /* section header index */ 336 } Elf32_Sym; 337 338 /* Symbol table index */ 339 #define STN_UNDEF 0 /* undefined */ 340 341 /* Extract symbol info - st_info */ 342 #define ELF32_ST_BIND(x) ((x) >> 4) 343 #define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf) 344 #define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) 345 #define ELF32_ST_VISIBILITY(x) ((x) & 0x3) 346 347 /* Symbol Binding - ELF32_ST_BIND - st_info */ 348 #define STB_LOCAL 0 /* Local symbol */ 349 #define STB_GLOBAL 1 /* Global symbol */ 350 #define STB_WEAK 2 /* like global - lower precedence */ 351 #define STB_NUM 3 /* number of symbol bindings */ 352 #define STB_LOOS 10 /* reserved range for operating */ 353 #define STB_HIOS 12 /* system specific symbol bindings */ 354 #define STB_LOPROC 13 /* reserved range for processor */ 355 #define STB_HIPROC 15 /* specific symbol bindings */ 356 357 /* Symbol type - ELF32_ST_TYPE - st_info */ 358 #define STT_NOTYPE 0 /* not specified */ 359 #define STT_OBJECT 1 /* data object */ 360 #define STT_FUNC 2 /* function */ 361 #define STT_SECTION 3 /* section */ 362 #define STT_FILE 4 /* file */ 363 #define STT_NUM 5 /* number of symbol types */ 364 #define STT_TLS 6 /* Thread local storage symbol */ 365 #define STT_LOOS 10 /* reserved range for operating */ 366 #define STT_HIOS 12 /* system specific symbol types */ 367 #define STT_LOPROC 13 /* reserved range for processor */ 368 #define STT_HIPROC 15 /* specific symbol types */ 369 370 /* Symbol visibility - ELF32_ST_VISIBILITY - st_other */ 371 #define STV_DEFAULT 0 /* Normal visibility rules */ 372 #define STV_INTERNAL 1 /* Processor specific hidden class */ 373 #define STV_HIDDEN 2 /* Symbol unavailable in other mods */ 374 #define STV_PROTECTED 3 /* Not preemptible, not exported */ 375 376 377 /* Relocation entry with implicit addend */ 378 typedef struct 379 { 380 Elf32_Addr r_offset; /* offset of relocation */ 381 Elf32_Word r_info; /* symbol table index and type */ 382 } Elf32_Rel; 383 384 /* Relocation entry with explicit addend */ 385 typedef struct 386 { 387 Elf32_Addr r_offset; /* offset of relocation */ 388 Elf32_Word r_info; /* symbol table index and type */ 389 Elf32_Sword r_addend; 390 } Elf32_Rela; 391 392 typedef struct { 393 Elf64_Addr r_offset; /* Location at which to apply the action */ 394 Elf64_Xword r_info; /* index and type of relocation */ 395 } Elf64_Rel; 396 397 typedef struct { 398 Elf64_Addr r_offset; /* Location at which to apply the action */ 399 Elf64_Xword r_info; /* index and type of relocation */ 400 Elf64_Sxword r_addend; /* Constant addend used to compute value */ 401 } Elf64_Rela; 402 403 /* Extract relocation info - r_info */ 404 #define ELF32_R_SYM(i) ((i) >> 8) 405 #define ELF32_R_TYPE(i) ((unsigned char) (i)) 406 #define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t)) 407 408 /* Program Header */ 409 typedef struct { 410 Elf32_Word p_type; /* segment type */ 411 Elf32_Off p_offset; /* segment offset */ 412 Elf32_Addr p_vaddr; /* virtual address of segment */ 413 Elf32_Addr p_paddr; /* physical address - ignored? */ 414 Elf32_Word p_filesz; /* number of bytes in file for seg. */ 415 Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ 416 Elf32_Word p_flags; /* flags */ 417 Elf32_Word p_align; /* memory alignment */ 418 } Elf32_Phdr; 419 420 /* Segment types - p_type */ 421 #define PT_NULL 0 /* unused */ 422 #define PT_LOAD 1 /* loadable segment */ 423 #define PT_DYNAMIC 2 /* dynamic linking section */ 424 #define PT_INTERP 3 /* the RTLD */ 425 #define PT_NOTE 4 /* auxiliary information */ 426 #define PT_SHLIB 5 /* reserved - purpose undefined */ 427 #define PT_PHDR 6 /* program header */ 428 #define PT_TLS 7 /* Thread local storage template */ 429 #define PT_NUM 8 /* Number of segment types */ 430 #define PT_LOOS 0x60000000 /* reserved range for operating */ 431 #define PT_HIOS 0x6fffffff /* system specific segment types */ 432 #define PT_LOPROC 0x70000000 /* reserved range for processor */ 433 #define PT_HIPROC 0x7fffffff /* specific segment types */ 434 435 /* Segment flags - p_flags */ 436 #define PF_X 0x1 /* Executable */ 437 #define PF_W 0x2 /* Writable */ 438 #define PF_R 0x4 /* Readable */ 439 #define PF_MASKOS 0x0ff00000 /* OS specific segment flags */ 440 #define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ 441 /* specific segment flags */ 442 /* Dynamic structure */ 443 typedef struct 444 { 445 Elf32_Sword d_tag; /* controls meaning of d_val */ 446 union 447 { 448 Elf32_Word d_val; /* Multiple meanings - see d_tag */ 449 Elf32_Addr d_ptr; /* program virtual address */ 450 } d_un; 451 } Elf32_Dyn; 452 453 extern Elf32_Dyn _DYNAMIC[]; 454 455 typedef struct { 456 Elf64_Sxword d_tag; /* entry tag value */ 457 union { 458 Elf64_Xword d_val; 459 Elf64_Addr d_ptr; 460 } d_un; 461 } Elf64_Dyn; 462 463 #define ELF64_R_SYM(i) ((i) >> 32) 464 #define ELF64_R_TYPE(i) ((i) & 0xffffffff) 465 466 /* Dynamic Array Tags - d_tag */ 467 #define DT_NULL 0 /* marks end of _DYNAMIC array */ 468 #define DT_NEEDED 1 /* string table offset of needed lib */ 469 #define DT_PLTRELSZ 2 /* size of relocation entries in PLT */ 470 #define DT_PLTGOT 3 /* address PLT/GOT */ 471 #define DT_HASH 4 /* address of symbol hash table */ 472 #define DT_STRTAB 5 /* address of string table */ 473 #define DT_SYMTAB 6 /* address of symbol table */ 474 #define DT_RELA 7 /* address of relocation table */ 475 #define DT_RELASZ 8 /* size of relocation table */ 476 #define DT_RELAENT 9 /* size of relocation entry */ 477 #define DT_STRSZ 10 /* size of string table */ 478 #define DT_SYMENT 11 /* size of symbol table entry */ 479 #define DT_INIT 12 /* address of initialization func. */ 480 #define DT_FINI 13 /* address of termination function */ 481 #define DT_SONAME 14 /* string table offset of shared obj */ 482 #define DT_RPATH 15 /* string table offset of library 483 search path */ 484 #define DT_SYMBOLIC 16 /* start sym search in shared obj. */ 485 #define DT_REL 17 /* address of rel. tbl. w addends */ 486 #define DT_RELSZ 18 /* size of DT_REL relocation table */ 487 #define DT_RELENT 19 /* size of DT_REL relocation entry */ 488 #define DT_PLTREL 20 /* PLT referenced relocation entry */ 489 #define DT_DEBUG 21 /* bugger */ 490 #define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */ 491 #define DT_JMPREL 23 /* add. of PLT's relocation entries */ 492 #define DT_BIND_NOW 24 /* Process relocations of object */ 493 #define DT_INIT_ARRAY 25 /* Array with addresses of init fct */ 494 #define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */ 495 #define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */ 496 #define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */ 497 #define DT_RUNPATH 29 /* Library search path */ 498 #define DT_FLAGS 30 /* Flags for the object being loaded */ 499 #define DT_ENCODING 32 /* Start of encoded range */ 500 #define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/ 501 #define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */ 502 #define DT_NUM 34 /* Number used. */ 503 #define DT_LOOS 0x60000000 /* reserved range for OS */ 504 #define DT_HIOS 0x6fffffff /* specific dynamic array tags */ 505 #define DT_LOPROC 0x70000000 /* reserved range for processor */ 506 #define DT_HIPROC 0x7fffffff /* specific dynamic array tags */ 507 508 /* Dynamic Tag Flags - d_un.d_val */ 509 #define DF_ORIGIN 0x01 /* Object may use DF_ORIGIN */ 510 #define DF_SYMBOLIC 0x02 /* Symbol resolutions starts here */ 511 #define DF_TEXTREL 0x04 /* Object contains text relocations */ 512 #define DF_BIND_NOW 0x08 /* No lazy binding for this object */ 513 #define DF_STATIC_TLS 0x10 /* Static thread local storage */ 514 515 /* Standard ELF hashing function */ 516 unsigned long elf_hash(const unsigned char *name); 517 518 #define ELF_TARG_VER 1 /* The ver for which this code is intended */ 519 520 /* 521 * XXX - PowerPC defines really don't belong in here, 522 * but we'll put them in for simplicity. 523 */ 524 525 /* Values for Elf32/64_Ehdr.e_flags. */ 526 #define EF_PPC_EMB 0x80000000 /* PowerPC embedded flag */ 527 528 /* Cygnus local bits below */ 529 #define EF_PPC_RELOCATABLE 0x00010000 /* PowerPC -mrelocatable flag*/ 530 #define EF_PPC_RELOCATABLE_LIB 0x00008000 /* PowerPC -mrelocatable-lib 531 flag */ 532 533 /* PowerPC relocations defined by the ABIs */ 534 #define R_PPC_NONE 0 535 #define R_PPC_ADDR32 1 /* 32bit absolute address */ 536 #define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored. */ 537 #define R_PPC_ADDR16 3 /* 16bit absolute address */ 538 #define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */ 539 #define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */ 540 #define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */ 541 #define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */ 542 #define R_PPC_ADDR14_BRTAKEN 8 543 #define R_PPC_ADDR14_BRNTAKEN 9 544 #define R_PPC_REL24 10 /* PC relative 26 bit */ 545 #define R_PPC_REL14 11 /* PC relative 16 bit */ 546 #define R_PPC_REL14_BRTAKEN 12 547 #define R_PPC_REL14_BRNTAKEN 13 548 #define R_PPC_GOT16 14 549 #define R_PPC_GOT16_LO 15 550 #define R_PPC_GOT16_HI 16 551 #define R_PPC_GOT16_HA 17 552 #define R_PPC_PLTREL24 18 553 #define R_PPC_COPY 19 554 #define R_PPC_GLOB_DAT 20 555 #define R_PPC_JMP_SLOT 21 556 #define R_PPC_RELATIVE 22 557 #define R_PPC_LOCAL24PC 23 558 #define R_PPC_UADDR32 24 559 #define R_PPC_UADDR16 25 560 #define R_PPC_REL32 26 561 #define R_PPC_PLT32 27 562 #define R_PPC_PLTREL32 28 563 #define R_PPC_PLT16_LO 29 564 #define R_PPC_PLT16_HI 30 565 #define R_PPC_PLT16_HA 31 566 #define R_PPC_SDAREL16 32 567 #define R_PPC_SECTOFF 33 568 #define R_PPC_SECTOFF_LO 34 569 #define R_PPC_SECTOFF_HI 35 570 #define R_PPC_SECTOFF_HA 36 571 /* Keep this the last entry. */ 572 #define R_PPC_NUM 37 573 574 /* The remaining relocs are from the Embedded ELF ABI, and are not 575 in the SVR4 ELF ABI. */ 576 #define R_PPC_EMB_NADDR32 101 577 #define R_PPC_EMB_NADDR16 102 578 #define R_PPC_EMB_NADDR16_LO 103 579 #define R_PPC_EMB_NADDR16_HI 104 580 #define R_PPC_EMB_NADDR16_HA 105 581 #define R_PPC_EMB_SDAI16 106 582 #define R_PPC_EMB_SDA2I16 107 583 #define R_PPC_EMB_SDA2REL 108 584 #define R_PPC_EMB_SDA21 109 /* 16 bit offset in SDA */ 585 #define R_PPC_EMB_MRKREF 110 586 #define R_PPC_EMB_RELSEC16 111 587 #define R_PPC_EMB_RELST_LO 112 588 #define R_PPC_EMB_RELST_HI 113 589 #define R_PPC_EMB_RELST_HA 114 590 #define R_PPC_EMB_BIT_FLD 115 591 #define R_PPC_EMB_RELSDA 116 /* 16 bit relative offset in SDA */ 592 593 /* Diab tool relocations. */ 594 #define R_PPC_DIAB_SDA21_LO 180 /* like EMB_SDA21, but lower 16 bit */ 595 #define R_PPC_DIAB_SDA21_HI 181 /* like EMB_SDA21, but high 16 bit */ 596 #define R_PPC_DIAB_SDA21_HA 182 /* like EMB_SDA21, adjusted high 16 */ 597 #define R_PPC_DIAB_RELSDA_LO 183 /* like EMB_RELSDA, but lower 16 bit */ 598 #define R_PPC_DIAB_RELSDA_HI 184 /* like EMB_RELSDA, but high 16 bit */ 599 #define R_PPC_DIAB_RELSDA_HA 185 /* like EMB_RELSDA, adjusted high 16 */ 600 601 /* This is a phony reloc to handle any old fashioned TOC16 references 602 that may still be in object files. */ 603 #define R_PPC_TOC16 255 604 605 int valid_elf_image(unsigned long addr); 606 607 #endif /* _ELF_H */ 608