ELF.h revision e5b57347e9485b59dd8d70f8f90d7794f473147a
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/System/DataTypes.h" 24#include <cstring> 25 26namespace llvm { 27 28namespace ELF { 29 30typedef uint32_t Elf32_Addr; // Program address 31typedef uint16_t Elf32_Half; 32typedef uint32_t Elf32_Off; // File offset 33typedef int32_t Elf32_Sword; 34typedef uint32_t Elf32_Word; 35 36typedef uint64_t Elf64_Addr; 37typedef uint64_t Elf64_Off; 38typedef int32_t Elf64_Shalf; 39typedef int32_t Elf64_Sword; 40typedef uint32_t Elf64_Word; 41typedef int64_t Elf64_Sxword; 42typedef uint64_t Elf64_Xword; 43typedef uint32_t Elf64_Half; 44typedef uint16_t Elf64_Quarter; 45 46// Object file magic string. 47static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' }; 48 49// e_ident size and indices. 50enum { 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 64struct 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). 88struct 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 111enum { 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 122enum { 123 EV_NONE = 0, 124 EV_CURRENT = 1 125}; 126 127// Machine architectures 128enum { 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}; 145 146// Object file classes. 147enum { 148 ELFCLASS32 = 1, // 32-bit object file 149 ELFCLASS64 = 2 // 64-bit object file 150}; 151 152// Object file byte orderings. 153enum { 154 ELFDATANONE = 0, // Invalid data encoding. 155 ELFDATA2LSB = 1, // Little-endian object file 156 ELFDATA2MSB = 2 // Big-endian object file 157}; 158 159// OS ABI identification. 160enum { 161 ELFOSABI_NONE = 0, // UNIX System V ABI 162 ELFOSABI_HPUX = 1, // HP-UX operating system 163 ELFOSABI_NETBSD = 2, // NetBSD 164 ELFOSABI_LINUX = 3, // GNU/Linux 165 ELFOSABI_HURD = 4, // GNU/Hurd 166 ELFOSABI_SOLARIS = 6, // Solaris 167 ELFOSABI_AIX = 7, // AIX 168 ELFOSABI_IRIX = 8, // IRIX 169 ELFOSABI_FREEBSD = 9, // FreeBSD 170 ELFOSABI_TRU64 = 10, // TRU64 UNIX 171 ELFOSABI_MODESTO = 11, // Novell Modesto 172 ELFOSABI_OPENBSD = 12, // OpenBSD 173 ELFOSABI_OPENVMS = 13, // OpenVMS 174 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel 175 ELFOSABI_AROS = 15, // AROS 176 ELFOSABI_FENIXOS = 16, // FenixOS 177 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000 178 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000 179 ELFOSABI_ARM = 97, // ARM 180 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application 181}; 182 183// X86_64 relocations. 184enum { 185 R_X86_64_NONE = 0, 186 R_X86_64_64 = 1, 187 R_X86_64_PC32 = 2, 188 R_X86_64_GOT32 = 3, 189 R_X86_64_PLT32 = 4, 190 R_X86_64_COPY = 5, 191 R_X86_64_GLOB_DAT = 6, 192 R_X86_64_JUMP_SLOT = 7, 193 R_X86_64_RELATIVE = 8, 194 R_X86_64_GOTPCREL = 9, 195 R_X86_64_32 = 10, 196 R_X86_64_32S = 11, 197 R_X86_64_16 = 12, 198 R_X86_64_PC16 = 13, 199 R_X86_64_8 = 14, 200 R_X86_64_PC8 = 15, 201 R_X86_64_DTPMOD64 = 16, 202 R_X86_64_DTPOFF64 = 17, 203 R_X86_64_TPOFF64 = 18, 204 R_X86_64_TLSGD = 19, 205 R_X86_64_TLSLD = 20, 206 R_X86_64_DTPOFF32 = 21, 207 R_X86_64_GOTTPOFF = 22, 208 R_X86_64_TPOFF32 = 23, 209 R_X86_64_PC64 = 24, 210 R_X86_64_GOTOFF64 = 25, 211 R_X86_64_GOTPC32 = 26, 212 R_X86_64_SIZE32 = 32, 213 R_X86_64_SIZE64 = 33, 214 R_X86_64_GOTPC32_TLSDESC = 34, 215 R_X86_64_TLSDESC_CALL = 35, 216 R_X86_64_TLSDESC = 36 217}; 218 219// i386 relocations. 220// TODO: this is just a subset 221enum { 222 R_386_NONE = 0, 223 R_386_32 = 1, 224 R_386_PC32 = 2, 225 R_386_GOT32 = 3, 226 R_386_PLT32 = 4, 227 R_386_COPY = 5, 228 R_386_GLOB_DAT = 6, 229 R_386_JUMP_SLOT = 7, 230 R_386_RELATIVE = 8, 231 R_386_GOTOFF = 9, 232 R_386_GOTPC = 10, 233 R_386_32PLT = 11, 234 R_386_16 = 20, 235 R_386_PC16 = 21, 236 R_386_8 = 22, 237 R_386_PC8 = 23 238}; 239 240// Section header. 241struct Elf32_Shdr { 242 Elf32_Word sh_name; // Section name (index into string table) 243 Elf32_Word sh_type; // Section type (SHT_*) 244 Elf32_Word sh_flags; // Section flags (SHF_*) 245 Elf32_Addr sh_addr; // Address where section is to be loaded 246 Elf32_Off sh_offset; // File offset of section data, in bytes 247 Elf32_Word sh_size; // Size of section, in bytes 248 Elf32_Word sh_link; // Section type-specific header table index link 249 Elf32_Word sh_info; // Section type-specific extra information 250 Elf32_Word sh_addralign; // Section address alignment 251 Elf32_Word sh_entsize; // Size of records contained within the section 252}; 253 254// Section header for ELF64 - same fields as ELF32, different types. 255struct Elf64_Shdr { 256 Elf64_Half sh_name; 257 Elf64_Half sh_type; 258 Elf64_Xword sh_flags; 259 Elf64_Addr sh_addr; 260 Elf64_Off sh_offset; 261 Elf64_Xword sh_size; 262 Elf64_Half sh_link; 263 Elf64_Half sh_info; 264 Elf64_Xword sh_addralign; 265 Elf64_Xword sh_entsize; 266}; 267 268// Special section indices. 269enum { 270 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless 271 SHN_LORESERVE = 0xff00, // Lowest reserved index 272 SHN_LOPROC = 0xff00, // Lowest processor-specific index 273 SHN_HIPROC = 0xff1f, // Highest processor-specific index 274 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation 275 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables 276 SHN_HIRESERVE = 0xffff // Highest reserved index 277}; 278 279// Section types. 280enum { 281 SHT_NULL = 0, // No associated section (inactive entry). 282 SHT_PROGBITS = 1, // Program-defined contents. 283 SHT_SYMTAB = 2, // Symbol table. 284 SHT_STRTAB = 3, // String table. 285 SHT_RELA = 4, // Relocation entries; explicit addends. 286 SHT_HASH = 5, // Symbol hash table. 287 SHT_DYNAMIC = 6, // Information for dynamic linking. 288 SHT_NOTE = 7, // Information about the file. 289 SHT_NOBITS = 8, // Data occupies no space in the file. 290 SHT_REL = 9, // Relocation entries; no explicit addends. 291 SHT_SHLIB = 10, // Reserved. 292 SHT_DYNSYM = 11, // Symbol table. 293 SHT_INIT_ARRAY = 14, // Pointers to initialisation functions. 294 SHT_FINI_ARRAY = 15, // Pointers to termination functions. 295 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions. 296 SHT_GROUP = 17, // Section group. 297 SHT_SYMTAB_SHNDX = 18, // Indicies for SHN_XINDEX entries. 298 SHT_LOOS = 0x60000000, // Lowest operating system-specific type. 299 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type. 300 SHT_LOPROC = 0x70000000, // Lowest processor architecture-specific type. 301 SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type. 302 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. 303 SHT_HIUSER = 0xffffffff // Highest type reserved for applications. 304}; 305 306// Section flags. 307enum { 308 SHF_WRITE = 0x1, // Section data should be writable during execution. 309 SHF_ALLOC = 0x2, // Section occupies memory during program execution. 310 SHF_EXECINSTR = 0x4, // Section contains executable machine instructions. 311 SHF_MASKPROC = 0xf0000000 // Bits indicating processor-specific flags. 312}; 313 314// Symbol table entries for ELF32. 315struct Elf32_Sym { 316 Elf32_Word st_name; // Symbol name (index into string table) 317 Elf32_Addr st_value; // Value or address associated with the symbol 318 Elf32_Word st_size; // Size of the symbol 319 unsigned char st_info; // Symbol's type and binding attributes 320 unsigned char st_other; // Must be zero; reserved 321 Elf32_Half st_shndx; // Which section (header table index) it's defined in 322 323 // These accessors and mutators correspond to the ELF32_ST_BIND, 324 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 325 unsigned char getBinding() const { return st_info >> 4; } 326 unsigned char getType() const { return st_info & 0x0f; } 327 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 328 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 329 void setBindingAndType(unsigned char b, unsigned char t) { 330 st_info = (b << 4) + (t & 0x0f); 331 } 332}; 333 334// Symbol table entries for ELF64. 335struct Elf64_Sym { 336 Elf64_Word st_name; // Symbol name (index into string table) 337 unsigned char st_info; // Symbol's type and binding attributes 338 unsigned char st_other; // Must be zero; reserved 339 Elf64_Half st_shndx; // Which section (header table index) it's defined in 340 Elf64_Addr st_value; // Value or address associated with the symbol 341 Elf64_Xword st_size; // Size of the symbol 342 343 // These accessors and mutators are identical to those defined for ELF32 344 // symbol table entries. 345 unsigned char getBinding() const { return st_info >> 4; } 346 unsigned char getType() const { return st_info & 0x0f; } 347 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 348 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 349 void setBindingAndType(unsigned char b, unsigned char t) { 350 st_info = (b << 4) + (t & 0x0f); 351 } 352}; 353 354// The size (in bytes) of symbol table entries. 355enum { 356 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size 357 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size. 358}; 359 360// Symbol bindings. 361enum { 362 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def 363 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined 364 STB_WEAK = 2, // Weak symbol, like global but lower-precedence 365 STB_LOPROC = 13, // Lowest processor-specific binding type 366 STB_HIPROC = 15 // Highest processor-specific binding type 367}; 368 369// Symbol types. 370enum { 371 STT_NOTYPE = 0, // Symbol's type is not specified 372 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) 373 STT_FUNC = 2, // Symbol is executable code (function, etc.) 374 STT_SECTION = 3, // Symbol refers to a section 375 STT_FILE = 4, // Local, absolute symbol that refers to a file 376 STT_COMMON = 5, // An uninitialised common block 377 STT_TLS = 6, // Thread local data object 378 STT_LOPROC = 13, // Lowest processor-specific symbol type 379 STT_HIPROC = 15 // Highest processor-specific symbol type 380}; 381 382enum { 383 STV_DEFAULT = 0, // Visibility is specified by binding type 384 STV_INTERNAL = 1, // Defined by processor supplements 385 STV_HIDDEN = 2, // Not visible to other components 386 STV_PROTECTED = 3 // Visible in other components but not preemptable 387}; 388 389// Relocation entry, without explicit addend. 390struct Elf32_Rel { 391 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 392 Elf32_Word r_info; // Symbol table index and type of relocation to apply 393 394 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 395 // and ELF32_R_INFO macros defined in the ELF specification: 396 Elf32_Word getSymbol() const { return (r_info >> 8); } 397 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 398 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 399 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 400 void setSymbolAndType(Elf32_Word s, unsigned char t) { 401 r_info = (s << 8) + t; 402 } 403}; 404 405// Relocation entry with explicit addend. 406struct Elf32_Rela { 407 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 408 Elf32_Word r_info; // Symbol table index and type of relocation to apply 409 Elf32_Sword r_addend; // Compute value for relocatable field by adding this 410 411 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 412 // and ELF32_R_INFO macros defined in the ELF specification: 413 Elf32_Word getSymbol() const { return (r_info >> 8); } 414 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 415 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 416 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 417 void setSymbolAndType(Elf32_Word s, unsigned char t) { 418 r_info = (s << 8) + t; 419 } 420}; 421 422// Relocation entry, without explicit addend. 423struct Elf64_Rel { 424 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 425 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 426 427 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 428 // and ELF64_R_INFO macros defined in the ELF specification: 429 Elf64_Xword getSymbol() const { return (r_info >> 32); } 430 unsigned char getType() const { 431 return (unsigned char) (r_info & 0xffffffffL); 432 } 433 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 434 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 435 void setSymbolAndType(Elf64_Xword s, unsigned char t) { 436 r_info = (s << 32) + (t&0xffffffffL); 437 } 438}; 439 440// Relocation entry with explicit addend. 441struct Elf64_Rela { 442 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 443 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 444 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this. 445 446 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 447 // and ELF64_R_INFO macros defined in the ELF specification: 448 Elf64_Xword getSymbol() const { return (r_info >> 32); } 449 unsigned char getType() const { 450 return (unsigned char) (r_info & 0xffffffffL); 451 } 452 void setSymbol(Elf64_Xword s) { setSymbolAndType(s, getType()); } 453 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 454 void setSymbolAndType(Elf64_Xword s, unsigned char t) { 455 r_info = (s << 32) + (t&0xffffffffL); 456 } 457}; 458 459// Program header for ELF32. 460struct Elf32_Phdr { 461 Elf32_Word p_type; // Type of segment 462 Elf32_Off p_offset; // File offset where segment is located, in bytes 463 Elf32_Addr p_vaddr; // Virtual address of beginning of segment 464 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 465 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 466 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 467 Elf32_Word p_flags; // Segment flags 468 Elf32_Word p_align; // Segment alignment constraint 469}; 470 471// Program header for ELF64. 472struct Elf64_Phdr { 473 Elf64_Word p_type; // Type of segment 474 Elf64_Word p_flags; // Segment flags 475 Elf64_Off p_offset; // File offset where segment is located, in bytes 476 Elf64_Addr p_vaddr; // Virtual address of beginning of segment 477 Elf64_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 478 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 479 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 480 Elf64_Xword p_align; // Segment alignment constraint 481}; 482 483// Segment types. 484enum { 485 PT_NULL = 0, // Unused segment. 486 PT_LOAD = 1, // Loadable segment. 487 PT_DYNAMIC = 2, // Dynamic linking information. 488 PT_INTERP = 3, // Interpreter pathname. 489 PT_NOTE = 4, // Auxiliary information. 490 PT_SHLIB = 5, // Reserved. 491 PT_PHDR = 6, // The program header table itself. 492 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. 493 PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type. 494}; 495 496// Segment flag bits. 497enum { 498 PF_X = 1, // Execute 499 PF_W = 2, // Write 500 PF_R = 4, // Read 501 PF_MASKPROC = 0xf0000000 // Unspecified 502}; 503 504// Dynamic table entry for ELF32. 505struct Elf32_Dyn 506{ 507 Elf32_Sword d_tag; // Type of dynamic table entry. 508 union 509 { 510 Elf32_Word d_val; // Integer value of entry. 511 Elf32_Addr d_ptr; // Pointer value of entry. 512 } d_un; 513}; 514 515// Dynamic table entry for ELF64. 516struct Elf64_Dyn 517{ 518 Elf64_Sxword d_tag; // Type of dynamic table entry. 519 union 520 { 521 Elf64_Xword d_val; // Integer value of entry. 522 Elf64_Addr d_ptr; // Pointer value of entry. 523 } d_un; 524}; 525 526// Dynamic table entry tags. 527enum { 528 DT_NULL = 0, // Marks end of dynamic array. 529 DT_NEEDED = 1, // String table offset of needed library. 530 DT_PLTRELSZ = 2, // Size of relocation entries in PLT. 531 DT_PLTGOT = 3, // Address associated with linkage table. 532 DT_HASH = 4, // Address of symbolic hash table. 533 DT_STRTAB = 5, // Address of dynamic string table. 534 DT_SYMTAB = 6, // Address of dynamic symbol table. 535 DT_RELA = 7, // Address of relocation table (Rela entries). 536 DT_RELASZ = 8, // Size of Rela relocation table. 537 DT_RELAENT = 9, // Size of a Rela relocation entry. 538 DT_STRSZ = 10, // Total size of the string table. 539 DT_SYMENT = 11, // Size of a symbol table entry. 540 DT_INIT = 12, // Address of initialization function. 541 DT_FINI = 13, // Address of termination function. 542 DT_SONAME = 14, // String table offset of a shared objects name. 543 DT_RPATH = 15, // String table offset of library search path. 544 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm. 545 DT_REL = 17, // Address of relocation table (Rel entries). 546 DT_RELSZ = 18, // Size of Rel relocation table. 547 DT_RELENT = 19, // Size of a Rel relocation entry. 548 DT_PLTREL = 20, // Type of relocation entry used for linking. 549 DT_DEBUG = 21, // Reserved for debugger. 550 DT_TEXTREL = 22, // Relocations exist for non-writable segements. 551 DT_JMPREL = 23, // Address of relocations associated with PLT. 552 DT_BIND_NOW = 24, // Process all relocations before execution. 553 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions. 554 DT_FINI_ARRAY = 26, // Pointer to array of termination functions. 555 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY. 556 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY. 557 DT_LOOS = 0x60000000, // Start of environment specific tags. 558 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags. 559 DT_LOPROC = 0x70000000, // Start of processor specific tags. 560 DT_HIPROC = 0x7FFFFFFF // End of processor specific tags. 561}; 562 563} // end namespace ELF 564 565} // end namespace llvm 566 567#endif 568