1 //===-- llvm/Support/ELF.h - ELF constants and data structures --*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This header contains common, non-processor-specific data structures and 11 // constants for the ELF file format. 12 // 13 // The details of the ELF32 bits in this file are largely based on the Tool 14 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification 15 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format 16 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files. 17 // 18 //===----------------------------------------------------------------------===// 19 20 #ifndef LLVM_SUPPORT_ELF_H 21 #define LLVM_SUPPORT_ELF_H 22 23 #include "llvm/Support/DataTypes.h" 24 #include <cstring> 25 26 namespace llvm { 27 28 namespace ELF { 29 30 typedef uint32_t Elf32_Addr; // Program address 31 typedef uint16_t Elf32_Half; 32 typedef uint32_t Elf32_Off; // File offset 33 typedef int32_t Elf32_Sword; 34 typedef uint32_t Elf32_Word; 35 36 typedef uint64_t Elf64_Addr; 37 typedef uint64_t Elf64_Off; 38 typedef int32_t Elf64_Shalf; 39 typedef int32_t Elf64_Sword; 40 typedef uint32_t Elf64_Word; 41 typedef int64_t Elf64_Sxword; 42 typedef uint64_t Elf64_Xword; 43 typedef uint32_t Elf64_Half; 44 typedef uint16_t Elf64_Quarter; 45 46 // Object file magic string. 47 static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' }; 48 49 // e_ident size and indices. 50 enum { 51 EI_MAG0 = 0, // File identification index. 52 EI_MAG1 = 1, // File identification index. 53 EI_MAG2 = 2, // File identification index. 54 EI_MAG3 = 3, // File identification index. 55 EI_CLASS = 4, // File class. 56 EI_DATA = 5, // Data encoding. 57 EI_VERSION = 6, // File version. 58 EI_OSABI = 7, // OS/ABI identification. 59 EI_ABIVERSION = 8, // ABI version. 60 EI_PAD = 9, // Start of padding bytes. 61 EI_NIDENT = 16 // Number of bytes in e_ident. 62 }; 63 64 struct Elf32_Ehdr { 65 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes 66 Elf32_Half e_type; // Type of file (see ET_* below) 67 Elf32_Half e_machine; // Required architecture for this file (see EM_*) 68 Elf32_Word e_version; // Must be equal to 1 69 Elf32_Addr e_entry; // Address to jump to in order to start program 70 Elf32_Off e_phoff; // Program header table's file offset, in bytes 71 Elf32_Off e_shoff; // Section header table's file offset, in bytes 72 Elf32_Word e_flags; // Processor-specific flags 73 Elf32_Half e_ehsize; // Size of ELF header, in bytes 74 Elf32_Half e_phentsize; // Size of an entry in the program header table 75 Elf32_Half e_phnum; // Number of entries in the program header table 76 Elf32_Half e_shentsize; // Size of an entry in the section header table 77 Elf32_Half e_shnum; // Number of entries in the section header table 78 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table 79 bool checkMagic() const { 80 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 81 } 82 unsigned char getFileClass() const { return e_ident[EI_CLASS]; } 83 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; } 84 }; 85 86 // 64-bit ELF header. Fields are the same as for ELF32, but with different 87 // types (see above). 88 struct Elf64_Ehdr { 89 unsigned char e_ident[EI_NIDENT]; 90 Elf64_Quarter e_type; 91 Elf64_Quarter e_machine; 92 Elf64_Half e_version; 93 Elf64_Addr e_entry; 94 Elf64_Off e_phoff; 95 Elf64_Off e_shoff; 96 Elf64_Half e_flags; 97 Elf64_Quarter e_ehsize; 98 Elf64_Quarter e_phentsize; 99 Elf64_Quarter e_phnum; 100 Elf64_Quarter e_shentsize; 101 Elf64_Quarter e_shnum; 102 Elf64_Quarter e_shstrndx; 103 bool checkMagic() const { 104 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 105 } 106 unsigned char getFileClass() const { return e_ident[EI_CLASS]; } 107 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; } 108 }; 109 110 // File types 111 enum { 112 ET_NONE = 0, // No file type 113 ET_REL = 1, // Relocatable file 114 ET_EXEC = 2, // Executable file 115 ET_DYN = 3, // Shared object file 116 ET_CORE = 4, // Core file 117 ET_LOPROC = 0xff00, // Beginning of processor-specific codes 118 ET_HIPROC = 0xffff // Processor-specific 119 }; 120 121 // Versioning 122 enum { 123 EV_NONE = 0, 124 EV_CURRENT = 1 125 }; 126 127 // Machine architectures 128 enum { 129 EM_NONE = 0, // No machine 130 EM_M32 = 1, // AT&T WE 32100 131 EM_SPARC = 2, // SPARC 132 EM_386 = 3, // Intel 386 133 EM_68K = 4, // Motorola 68000 134 EM_88K = 5, // Motorola 88000 135 EM_486 = 6, // Intel 486 (deprecated) 136 EM_860 = 7, // Intel 80860 137 EM_MIPS = 8, // MIPS R3000 138 EM_PPC = 20, // PowerPC 139 EM_PPC64 = 21, // PowerPC64 140 EM_ARM = 40, // ARM 141 EM_ALPHA = 41, // DEC Alpha 142 EM_SPARCV9 = 43, // SPARC V9 143 EM_X86_64 = 62, // AMD64 144 EM_MBLAZE = 47787 // Xilinx MicroBlaze 145 }; 146 147 // Object file classes. 148 enum { 149 ELFCLASSNONE = 0, 150 ELFCLASS32 = 1, // 32-bit object file 151 ELFCLASS64 = 2 // 64-bit object file 152 }; 153 154 // Object file byte orderings. 155 enum { 156 ELFDATANONE = 0, // Invalid data encoding. 157 ELFDATA2LSB = 1, // Little-endian object file 158 ELFDATA2MSB = 2 // Big-endian object file 159 }; 160 161 // OS ABI identification. 162 enum { 163 ELFOSABI_NONE = 0, // UNIX System V ABI 164 ELFOSABI_HPUX = 1, // HP-UX operating system 165 ELFOSABI_NETBSD = 2, // NetBSD 166 ELFOSABI_LINUX = 3, // GNU/Linux 167 ELFOSABI_HURD = 4, // GNU/Hurd 168 ELFOSABI_SOLARIS = 6, // Solaris 169 ELFOSABI_AIX = 7, // AIX 170 ELFOSABI_IRIX = 8, // IRIX 171 ELFOSABI_FREEBSD = 9, // FreeBSD 172 ELFOSABI_TRU64 = 10, // TRU64 UNIX 173 ELFOSABI_MODESTO = 11, // Novell Modesto 174 ELFOSABI_OPENBSD = 12, // OpenBSD 175 ELFOSABI_OPENVMS = 13, // OpenVMS 176 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel 177 ELFOSABI_AROS = 15, // AROS 178 ELFOSABI_FENIXOS = 16, // FenixOS 179 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000 180 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000 181 ELFOSABI_ARM = 97, // ARM 182 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application 183 }; 184 185 // X86_64 relocations. 186 enum { 187 R_X86_64_NONE = 0, 188 R_X86_64_64 = 1, 189 R_X86_64_PC32 = 2, 190 R_X86_64_GOT32 = 3, 191 R_X86_64_PLT32 = 4, 192 R_X86_64_COPY = 5, 193 R_X86_64_GLOB_DAT = 6, 194 R_X86_64_JUMP_SLOT = 7, 195 R_X86_64_RELATIVE = 8, 196 R_X86_64_GOTPCREL = 9, 197 R_X86_64_32 = 10, 198 R_X86_64_32S = 11, 199 R_X86_64_16 = 12, 200 R_X86_64_PC16 = 13, 201 R_X86_64_8 = 14, 202 R_X86_64_PC8 = 15, 203 R_X86_64_DTPMOD64 = 16, 204 R_X86_64_DTPOFF64 = 17, 205 R_X86_64_TPOFF64 = 18, 206 R_X86_64_TLSGD = 19, 207 R_X86_64_TLSLD = 20, 208 R_X86_64_DTPOFF32 = 21, 209 R_X86_64_GOTTPOFF = 22, 210 R_X86_64_TPOFF32 = 23, 211 R_X86_64_PC64 = 24, 212 R_X86_64_GOTOFF64 = 25, 213 R_X86_64_GOTPC32 = 26, 214 R_X86_64_SIZE32 = 32, 215 R_X86_64_SIZE64 = 33, 216 R_X86_64_GOTPC32_TLSDESC = 34, 217 R_X86_64_TLSDESC_CALL = 35, 218 R_X86_64_TLSDESC = 36 219 }; 220 221 // i386 relocations. 222 // TODO: this is just a subset 223 enum { 224 R_386_NONE = 0, 225 R_386_32 = 1, 226 R_386_PC32 = 2, 227 R_386_GOT32 = 3, 228 R_386_PLT32 = 4, 229 R_386_COPY = 5, 230 R_386_GLOB_DAT = 6, 231 R_386_JUMP_SLOT = 7, 232 R_386_RELATIVE = 8, 233 R_386_GOTOFF = 9, 234 R_386_GOTPC = 10, 235 R_386_32PLT = 11, 236 R_386_TLS_TPOFF = 14, 237 R_386_TLS_IE = 15, 238 R_386_TLS_GOTIE = 16, 239 R_386_TLS_LE = 17, 240 R_386_TLS_GD = 18, 241 R_386_TLS_LDM = 19, 242 R_386_16 = 20, 243 R_386_PC16 = 21, 244 R_386_8 = 22, 245 R_386_PC8 = 23, 246 R_386_TLS_GD_32 = 24, 247 R_386_TLS_GD_PUSH = 25, 248 R_386_TLS_GD_CALL = 26, 249 R_386_TLS_GD_POP = 27, 250 R_386_TLS_LDM_32 = 28, 251 R_386_TLS_LDM_PUSH = 29, 252 R_386_TLS_LDM_CALL = 30, 253 R_386_TLS_LDM_POP = 31, 254 R_386_TLS_LDO_32 = 32, 255 R_386_TLS_IE_32 = 33, 256 R_386_TLS_LE_32 = 34, 257 R_386_TLS_DTPMOD32 = 35, 258 R_386_TLS_DTPOFF32 = 36, 259 R_386_TLS_TPOFF32 = 37, 260 R_386_TLS_GOTDESC = 39, 261 R_386_TLS_DESC_CALL = 40, 262 R_386_TLS_DESC = 41, 263 R_386_IRELATIVE = 42, 264 R_386_NUM = 43 265 }; 266 267 // MBlaze relocations. 268 enum { 269 R_MICROBLAZE_NONE = 0, 270 R_MICROBLAZE_32 = 1, 271 R_MICROBLAZE_32_PCREL = 2, 272 R_MICROBLAZE_64_PCREL = 3, 273 R_MICROBLAZE_32_PCREL_LO = 4, 274 R_MICROBLAZE_64 = 5, 275 R_MICROBLAZE_32_LO = 6, 276 R_MICROBLAZE_SRO32 = 7, 277 R_MICROBLAZE_SRW32 = 8, 278 R_MICROBLAZE_64_NONE = 9, 279 R_MICROBLAZE_32_SYM_OP_SYM = 10, 280 R_MICROBLAZE_GNU_VTINHERIT = 11, 281 R_MICROBLAZE_GNU_VTENTRY = 12, 282 R_MICROBLAZE_GOTPC_64 = 13, 283 R_MICROBLAZE_GOT_64 = 14, 284 R_MICROBLAZE_PLT_64 = 15, 285 R_MICROBLAZE_REL = 16, 286 R_MICROBLAZE_JUMP_SLOT = 17, 287 R_MICROBLAZE_GLOB_DAT = 18, 288 R_MICROBLAZE_GOTOFF_64 = 19, 289 R_MICROBLAZE_GOTOFF_32 = 20, 290 R_MICROBLAZE_COPY = 21 291 }; 292 293 294 // ARM Specific e_flags 295 enum { EF_ARM_EABIMASK = 0xFF000000U }; 296 297 // ELF Relocation types for ARM 298 // Meets 2.08 ABI Specs. 299 300 enum { 301 R_ARM_NONE = 0x00, 302 R_ARM_PC24 = 0x01, 303 R_ARM_ABS32 = 0x02, 304 R_ARM_REL32 = 0x03, 305 R_ARM_LDR_PC_G0 = 0x04, 306 R_ARM_ABS16 = 0x05, 307 R_ARM_ABS12 = 0x06, 308 R_ARM_THM_ABS5 = 0x07, 309 R_ARM_ABS8 = 0x08, 310 R_ARM_SBREL32 = 0x09, 311 R_ARM_THM_CALL = 0x0a, 312 R_ARM_THM_PC8 = 0x0b, 313 R_ARM_BREL_ADJ = 0x0c, 314 R_ARM_TLS_DESC = 0x0d, 315 R_ARM_THM_SWI8 = 0x0e, 316 R_ARM_XPC25 = 0x0f, 317 R_ARM_THM_XPC22 = 0x10, 318 R_ARM_TLS_DTPMOD32 = 0x11, 319 R_ARM_TLS_DTPOFF32 = 0x12, 320 R_ARM_TLS_TPOFF32 = 0x13, 321 R_ARM_COPY = 0x14, 322 R_ARM_GLOB_DAT = 0x15, 323 R_ARM_JUMP_SLOT = 0x16, 324 R_ARM_RELATIVE = 0x17, 325 R_ARM_GOTOFF32 = 0x18, 326 R_ARM_BASE_PREL = 0x19, 327 R_ARM_GOT_BREL = 0x1a, 328 R_ARM_PLT32 = 0x1b, 329 R_ARM_CALL = 0x1c, 330 R_ARM_JUMP24 = 0x1d, 331 R_ARM_THM_JUMP24 = 0x1e, 332 R_ARM_BASE_ABS = 0x1f, 333 R_ARM_ALU_PCREL_7_0 = 0x20, 334 R_ARM_ALU_PCREL_15_8 = 0x21, 335 R_ARM_ALU_PCREL_23_15 = 0x22, 336 R_ARM_LDR_SBREL_11_0_NC = 0x23, 337 R_ARM_ALU_SBREL_19_12_NC = 0x24, 338 R_ARM_ALU_SBREL_27_20_CK = 0x25, 339 R_ARM_TARGET1 = 0x26, 340 R_ARM_SBREL31 = 0x27, 341 R_ARM_V4BX = 0x28, 342 R_ARM_TARGET2 = 0x29, 343 R_ARM_PREL31 = 0x2a, 344 R_ARM_MOVW_ABS_NC = 0x2b, 345 R_ARM_MOVT_ABS = 0x2c, 346 R_ARM_MOVW_PREL_NC = 0x2d, 347 R_ARM_MOVT_PREL = 0x2e, 348 R_ARM_THM_MOVW_ABS_NC = 0x2f, 349 R_ARM_THM_MOVT_ABS = 0x30, 350 R_ARM_THM_MOVW_PREL_NC = 0x31, 351 R_ARM_THM_MOVT_PREL = 0x32, 352 R_ARM_THM_JUMP19 = 0x33, 353 R_ARM_THM_JUMP6 = 0x34, 354 R_ARM_THM_ALU_PREL_11_0 = 0x35, 355 R_ARM_THM_PC12 = 0x36, 356 R_ARM_ABS32_NOI = 0x37, 357 R_ARM_REL32_NOI = 0x38, 358 R_ARM_ALU_PC_G0_NC = 0x39, 359 R_ARM_ALU_PC_G0 = 0x3a, 360 R_ARM_ALU_PC_G1_NC = 0x3b, 361 R_ARM_ALU_PC_G1 = 0x3c, 362 R_ARM_ALU_PC_G2 = 0x3d, 363 R_ARM_LDR_PC_G1 = 0x3e, 364 R_ARM_LDR_PC_G2 = 0x3f, 365 R_ARM_LDRS_PC_G0 = 0x40, 366 R_ARM_LDRS_PC_G1 = 0x41, 367 R_ARM_LDRS_PC_G2 = 0x42, 368 R_ARM_LDC_PC_G0 = 0x43, 369 R_ARM_LDC_PC_G1 = 0x44, 370 R_ARM_LDC_PC_G2 = 0x45, 371 R_ARM_ALU_SB_G0_NC = 0x46, 372 R_ARM_ALU_SB_G0 = 0x47, 373 R_ARM_ALU_SB_G1_NC = 0x48, 374 R_ARM_ALU_SB_G1 = 0x49, 375 R_ARM_ALU_SB_G2 = 0x4a, 376 R_ARM_LDR_SB_G0 = 0x4b, 377 R_ARM_LDR_SB_G1 = 0x4c, 378 R_ARM_LDR_SB_G2 = 0x4d, 379 R_ARM_LDRS_SB_G0 = 0x4e, 380 R_ARM_LDRS_SB_G1 = 0x4f, 381 R_ARM_LDRS_SB_G2 = 0x50, 382 R_ARM_LDC_SB_G0 = 0x51, 383 R_ARM_LDC_SB_G1 = 0x52, 384 R_ARM_LDC_SB_G2 = 0x53, 385 R_ARM_MOVW_BREL_NC = 0x54, 386 R_ARM_MOVT_BREL = 0x55, 387 R_ARM_MOVW_BREL = 0x56, 388 R_ARM_THM_MOVW_BREL_NC = 0x57, 389 R_ARM_THM_MOVT_BREL = 0x58, 390 R_ARM_THM_MOVW_BREL = 0x59, 391 R_ARM_TLS_GOTDESC = 0x5a, 392 R_ARM_TLS_CALL = 0x5b, 393 R_ARM_TLS_DESCSEQ = 0x5c, 394 R_ARM_THM_TLS_CALL = 0x5d, 395 R_ARM_PLT32_ABS = 0x5e, 396 R_ARM_GOT_ABS = 0x5f, 397 R_ARM_GOT_PREL = 0x60, 398 R_ARM_GOT_BREL12 = 0x61, 399 R_ARM_GOTOFF12 = 0x62, 400 R_ARM_GOTRELAX = 0x63, 401 R_ARM_GNU_VTENTRY = 0x64, 402 R_ARM_GNU_VTINHERIT = 0x65, 403 R_ARM_THM_JUMP11 = 0x66, 404 R_ARM_THM_JUMP8 = 0x67, 405 R_ARM_TLS_GD32 = 0x68, 406 R_ARM_TLS_LDM32 = 0x69, 407 R_ARM_TLS_LDO32 = 0x6a, 408 R_ARM_TLS_IE32 = 0x6b, 409 R_ARM_TLS_LE32 = 0x6c, 410 R_ARM_TLS_LDO12 = 0x6d, 411 R_ARM_TLS_LE12 = 0x6e, 412 R_ARM_TLS_IE12GP = 0x6f, 413 R_ARM_PRIVATE_0 = 0x70, 414 R_ARM_PRIVATE_1 = 0x71, 415 R_ARM_PRIVATE_2 = 0x72, 416 R_ARM_PRIVATE_3 = 0x73, 417 R_ARM_PRIVATE_4 = 0x74, 418 R_ARM_PRIVATE_5 = 0x75, 419 R_ARM_PRIVATE_6 = 0x76, 420 R_ARM_PRIVATE_7 = 0x77, 421 R_ARM_PRIVATE_8 = 0x78, 422 R_ARM_PRIVATE_9 = 0x79, 423 R_ARM_PRIVATE_10 = 0x7a, 424 R_ARM_PRIVATE_11 = 0x7b, 425 R_ARM_PRIVATE_12 = 0x7c, 426 R_ARM_PRIVATE_13 = 0x7d, 427 R_ARM_PRIVATE_14 = 0x7e, 428 R_ARM_PRIVATE_15 = 0x7f, 429 R_ARM_ME_TOO = 0x80, 430 R_ARM_THM_TLS_DESCSEQ16 = 0x81, 431 R_ARM_THM_TLS_DESCSEQ32 = 0x82 432 }; 433 434 435 436 // Section header. 437 struct Elf32_Shdr { 438 Elf32_Word sh_name; // Section name (index into string table) 439 Elf32_Word sh_type; // Section type (SHT_*) 440 Elf32_Word sh_flags; // Section flags (SHF_*) 441 Elf32_Addr sh_addr; // Address where section is to be loaded 442 Elf32_Off sh_offset; // File offset of section data, in bytes 443 Elf32_Word sh_size; // Size of section, in bytes 444 Elf32_Word sh_link; // Section type-specific header table index link 445 Elf32_Word sh_info; // Section type-specific extra information 446 Elf32_Word sh_addralign; // Section address alignment 447 Elf32_Word sh_entsize; // Size of records contained within the section 448 }; 449 450 // Section header for ELF64 - same fields as ELF32, different types. 451 struct Elf64_Shdr { 452 Elf64_Half sh_name; 453 Elf64_Half sh_type; 454 Elf64_Xword sh_flags; 455 Elf64_Addr sh_addr; 456 Elf64_Off sh_offset; 457 Elf64_Xword sh_size; 458 Elf64_Half sh_link; 459 Elf64_Half sh_info; 460 Elf64_Xword sh_addralign; 461 Elf64_Xword sh_entsize; 462 }; 463 464 // Special section indices. 465 enum { 466 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless 467 SHN_LORESERVE = 0xff00, // Lowest reserved index 468 SHN_LOPROC = 0xff00, // Lowest processor-specific index 469 SHN_HIPROC = 0xff1f, // Highest processor-specific index 470 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation 471 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables 472 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE 473 SHN_HIRESERVE = 0xffff // Highest reserved index 474 }; 475 476 // Section types. 477 enum { 478 SHT_NULL = 0, // No associated section (inactive entry). 479 SHT_PROGBITS = 1, // Program-defined contents. 480 SHT_SYMTAB = 2, // Symbol table. 481 SHT_STRTAB = 3, // String table. 482 SHT_RELA = 4, // Relocation entries; explicit addends. 483 SHT_HASH = 5, // Symbol hash table. 484 SHT_DYNAMIC = 6, // Information for dynamic linking. 485 SHT_NOTE = 7, // Information about the file. 486 SHT_NOBITS = 8, // Data occupies no space in the file. 487 SHT_REL = 9, // Relocation entries; no explicit addends. 488 SHT_SHLIB = 10, // Reserved. 489 SHT_DYNSYM = 11, // Symbol table. 490 SHT_INIT_ARRAY = 14, // Pointers to initialization functions. 491 SHT_FINI_ARRAY = 15, // Pointers to termination functions. 492 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions. 493 SHT_GROUP = 17, // Section group. 494 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries. 495 SHT_LOOS = 0x60000000, // Lowest operating system-specific type. 496 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type. 497 SHT_LOPROC = 0x70000000, // Lowest processor architecture-specific type. 498 // Fixme: All this is duplicated in MCSectionELF. Why?? 499 // Exception Index table 500 SHT_ARM_EXIDX = 0x70000001U, 501 // BPABI DLL dynamic linking pre-emption map 502 SHT_ARM_PREEMPTMAP = 0x70000002U, 503 // Object file compatibility attributes 504 SHT_ARM_ATTRIBUTES = 0x70000003U, 505 SHT_ARM_DEBUGOVERLAY = 0x70000004U, 506 SHT_ARM_OVERLAYSECTION = 0x70000005U, 507 508 SHT_X86_64_UNWIND = 0x70000001, // Unwind information 509 510 SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type. 511 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. 512 SHT_HIUSER = 0xffffffff // Highest type reserved for applications. 513 }; 514 515 // Section flags. 516 enum { 517 // Section data should be writable during execution. 518 SHF_WRITE = 0x1, 519 520 // Section occupies memory during program execution. 521 SHF_ALLOC = 0x2, 522 523 // Section contains executable machine instructions. 524 SHF_EXECINSTR = 0x4, 525 526 // The data in this section may be merged. 527 SHF_MERGE = 0x10, 528 529 // The data in this section is null-terminated strings. 530 SHF_STRINGS = 0x20, 531 532 // A field in this section holds a section header table index. 533 SHF_INFO_LINK = 0x40U, 534 535 // Adds special ordering requirements for link editors. 536 SHF_LINK_ORDER = 0x80U, 537 538 // This section requires special OS-specific processing to avoid incorrect 539 // behavior. 540 SHF_OS_NONCONFORMING = 0x100U, 541 542 // This section is a member of a section group. 543 SHF_GROUP = 0x200U, 544 545 // This section holds Thread-Local Storage. 546 SHF_TLS = 0x400U, 547 548 // Start of target-specific flags. 549 550 /// XCORE_SHF_CP_SECTION - All sections with the "c" flag are grouped 551 /// together by the linker to form the constant pool and the cp register is 552 /// set to the start of the constant pool by the boot code. 553 XCORE_SHF_CP_SECTION = 0x800U, 554 555 /// XCORE_SHF_DP_SECTION - All sections with the "d" flag are grouped 556 /// together by the linker to form the data section and the dp register is 557 /// set to the start of the section by the boot code. 558 XCORE_SHF_DP_SECTION = 0x1000U, 559 560 // Bits indicating processor-specific flags. 561 SHF_MASKPROC = 0xf0000000 562 }; 563 564 // Section Group Flags 565 enum { 566 GRP_COMDAT = 0x1, 567 GRP_MASKOS = 0x0ff00000, 568 GRP_MASKPROC = 0xf0000000 569 }; 570 571 // Symbol table entries for ELF32. 572 struct Elf32_Sym { 573 Elf32_Word st_name; // Symbol name (index into string table) 574 Elf32_Addr st_value; // Value or address associated with the symbol 575 Elf32_Word st_size; // Size of the symbol 576 unsigned char st_info; // Symbol's type and binding attributes 577 unsigned char st_other; // Must be zero; reserved 578 Elf32_Half st_shndx; // Which section (header table index) it's defined in 579 580 // These accessors and mutators correspond to the ELF32_ST_BIND, 581 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 582 unsigned char getBinding() const { return st_info >> 4; } 583 unsigned char getType() const { return st_info & 0x0f; } 584 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 585 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 586 void setBindingAndType(unsigned char b, unsigned char t) { 587 st_info = (b << 4) + (t & 0x0f); 588 } 589 }; 590 591 // Symbol table entries for ELF64. 592 struct Elf64_Sym { 593 Elf64_Word st_name; // Symbol name (index into string table) 594 unsigned char st_info; // Symbol's type and binding attributes 595 unsigned char st_other; // Must be zero; reserved 596 Elf64_Half st_shndx; // Which section (header table index) it's defined in 597 Elf64_Addr st_value; // Value or address associated with the symbol 598 Elf64_Xword st_size; // Size of the symbol 599 600 // These accessors and mutators are identical to those defined for ELF32 601 // symbol table entries. 602 unsigned char getBinding() const { return st_info >> 4; } 603 unsigned char getType() const { return st_info & 0x0f; } 604 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 605 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 606 void setBindingAndType(unsigned char b, unsigned char t) { 607 st_info = (b << 4) + (t & 0x0f); 608 } 609 }; 610 611 // The size (in bytes) of symbol table entries. 612 enum { 613 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size 614 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size. 615 }; 616 617 // Symbol bindings. 618 enum { 619 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def 620 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined 621 STB_WEAK = 2, // Weak symbol, like global but lower-precedence 622 STB_LOPROC = 13, // Lowest processor-specific binding type 623 STB_HIPROC = 15 // Highest processor-specific binding type 624 }; 625 626 // Symbol types. 627 enum { 628 STT_NOTYPE = 0, // Symbol's type is not specified 629 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) 630 STT_FUNC = 2, // Symbol is executable code (function, etc.) 631 STT_SECTION = 3, // Symbol refers to a section 632 STT_FILE = 4, // Local, absolute symbol that refers to a file 633 STT_COMMON = 5, // An uninitialized common block 634 STT_TLS = 6, // Thread local data object 635 STT_LOPROC = 13, // Lowest processor-specific symbol type 636 STT_HIPROC = 15 // Highest processor-specific symbol type 637 }; 638 639 enum { 640 STV_DEFAULT = 0, // Visibility is specified by binding type 641 STV_INTERNAL = 1, // Defined by processor supplements 642 STV_HIDDEN = 2, // Not visible to other components 643 STV_PROTECTED = 3 // Visible in other components but not preemptable 644 }; 645 646 // Relocation entry, without explicit addend. 647 struct Elf32_Rel { 648 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 649 Elf32_Word r_info; // Symbol table index and type of relocation to apply 650 651 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 652 // and ELF32_R_INFO macros defined in the ELF specification: 653 Elf32_Word getSymbol() const { return (r_info >> 8); } 654 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 655 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 656 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 657 void setSymbolAndType(Elf32_Word s, unsigned char t) { 658 r_info = (s << 8) + t; 659 } 660 }; 661 662 // Relocation entry with explicit addend. 663 struct Elf32_Rela { 664 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 665 Elf32_Word r_info; // Symbol table index and type of relocation to apply 666 Elf32_Sword r_addend; // Compute value for relocatable field by adding this 667 668 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 669 // and ELF32_R_INFO macros defined in the ELF specification: 670 Elf32_Word getSymbol() const { return (r_info >> 8); } 671 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 672 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 673 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 674 void setSymbolAndType(Elf32_Word s, unsigned char t) { 675 r_info = (s << 8) + t; 676 } 677 }; 678 679 // Relocation entry, without explicit addend. 680 struct Elf64_Rel { 681 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 682 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 683 684 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 685 // and ELF64_R_INFO macros defined in the ELF specification: 686 Elf64_Xword getSymbol() const { return (r_info >> 32); } 687 unsigned char getType() const { 688 return (unsigned char) (r_info & 0xffffffffL); 689 } 690 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 691 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 692 void setSymbolAndType(Elf64_Xword s, unsigned char t) { 693 r_info = (s << 32) + (t&0xffffffffL); 694 } 695 }; 696 697 // Relocation entry with explicit addend. 698 struct Elf64_Rela { 699 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 700 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 701 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this. 702 703 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 704 // and ELF64_R_INFO macros defined in the ELF specification: 705 Elf64_Xword getSymbol() const { return (r_info >> 32); } 706 unsigned char getType() const { 707 return (unsigned char) (r_info & 0xffffffffL); 708 } 709 void setSymbol(Elf64_Xword s) { setSymbolAndType(s, getType()); } 710 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 711 void setSymbolAndType(Elf64_Xword s, unsigned char t) { 712 r_info = (s << 32) + (t&0xffffffffL); 713 } 714 }; 715 716 // Program header for ELF32. 717 struct Elf32_Phdr { 718 Elf32_Word p_type; // Type of segment 719 Elf32_Off p_offset; // File offset where segment is located, in bytes 720 Elf32_Addr p_vaddr; // Virtual address of beginning of segment 721 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 722 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 723 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 724 Elf32_Word p_flags; // Segment flags 725 Elf32_Word p_align; // Segment alignment constraint 726 }; 727 728 // Program header for ELF64. 729 struct Elf64_Phdr { 730 Elf64_Word p_type; // Type of segment 731 Elf64_Word p_flags; // Segment flags 732 Elf64_Off p_offset; // File offset where segment is located, in bytes 733 Elf64_Addr p_vaddr; // Virtual address of beginning of segment 734 Elf64_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 735 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 736 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 737 Elf64_Xword p_align; // Segment alignment constraint 738 }; 739 740 // Segment types. 741 enum { 742 PT_NULL = 0, // Unused segment. 743 PT_LOAD = 1, // Loadable segment. 744 PT_DYNAMIC = 2, // Dynamic linking information. 745 PT_INTERP = 3, // Interpreter pathname. 746 PT_NOTE = 4, // Auxiliary information. 747 PT_SHLIB = 5, // Reserved. 748 PT_PHDR = 6, // The program header table itself. 749 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. 750 PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type. 751 }; 752 753 // Segment flag bits. 754 enum { 755 PF_X = 1, // Execute 756 PF_W = 2, // Write 757 PF_R = 4, // Read 758 PF_MASKPROC = 0xf0000000 // Unspecified 759 }; 760 761 // Dynamic table entry for ELF32. 762 struct Elf32_Dyn 763 { 764 Elf32_Sword d_tag; // Type of dynamic table entry. 765 union 766 { 767 Elf32_Word d_val; // Integer value of entry. 768 Elf32_Addr d_ptr; // Pointer value of entry. 769 } d_un; 770 }; 771 772 // Dynamic table entry for ELF64. 773 struct Elf64_Dyn 774 { 775 Elf64_Sxword d_tag; // Type of dynamic table entry. 776 union 777 { 778 Elf64_Xword d_val; // Integer value of entry. 779 Elf64_Addr d_ptr; // Pointer value of entry. 780 } d_un; 781 }; 782 783 // Dynamic table entry tags. 784 enum { 785 DT_NULL = 0, // Marks end of dynamic array. 786 DT_NEEDED = 1, // String table offset of needed library. 787 DT_PLTRELSZ = 2, // Size of relocation entries in PLT. 788 DT_PLTGOT = 3, // Address associated with linkage table. 789 DT_HASH = 4, // Address of symbolic hash table. 790 DT_STRTAB = 5, // Address of dynamic string table. 791 DT_SYMTAB = 6, // Address of dynamic symbol table. 792 DT_RELA = 7, // Address of relocation table (Rela entries). 793 DT_RELASZ = 8, // Size of Rela relocation table. 794 DT_RELAENT = 9, // Size of a Rela relocation entry. 795 DT_STRSZ = 10, // Total size of the string table. 796 DT_SYMENT = 11, // Size of a symbol table entry. 797 DT_INIT = 12, // Address of initialization function. 798 DT_FINI = 13, // Address of termination function. 799 DT_SONAME = 14, // String table offset of a shared objects name. 800 DT_RPATH = 15, // String table offset of library search path. 801 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm. 802 DT_REL = 17, // Address of relocation table (Rel entries). 803 DT_RELSZ = 18, // Size of Rel relocation table. 804 DT_RELENT = 19, // Size of a Rel relocation entry. 805 DT_PLTREL = 20, // Type of relocation entry used for linking. 806 DT_DEBUG = 21, // Reserved for debugger. 807 DT_TEXTREL = 22, // Relocations exist for non-writable segments. 808 DT_JMPREL = 23, // Address of relocations associated with PLT. 809 DT_BIND_NOW = 24, // Process all relocations before execution. 810 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions. 811 DT_FINI_ARRAY = 26, // Pointer to array of termination functions. 812 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY. 813 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY. 814 DT_LOOS = 0x60000000, // Start of environment specific tags. 815 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags. 816 DT_LOPROC = 0x70000000, // Start of processor specific tags. 817 DT_HIPROC = 0x7FFFFFFF // End of processor specific tags. 818 }; 819 820 } // end namespace ELF 821 822 } // end namespace llvm 823 824 #endif 825
