ELF.h revision cecbc3d28277ff4916326311cbf87335ed05d106
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 EM_MBLAZE = 47787 // Xilinx MicroBlaze 145}; 146 147// Object file classes. 148enum { 149 ELFCLASS32 = 1, // 32-bit object file 150 ELFCLASS64 = 2 // 64-bit object file 151}; 152 153// Object file byte orderings. 154enum { 155 ELFDATANONE = 0, // Invalid data encoding. 156 ELFDATA2LSB = 1, // Little-endian object file 157 ELFDATA2MSB = 2 // Big-endian object file 158}; 159 160// OS ABI identification. 161enum { 162 ELFOSABI_NONE = 0, // UNIX System V ABI 163 ELFOSABI_HPUX = 1, // HP-UX operating system 164 ELFOSABI_NETBSD = 2, // NetBSD 165 ELFOSABI_LINUX = 3, // GNU/Linux 166 ELFOSABI_HURD = 4, // GNU/Hurd 167 ELFOSABI_SOLARIS = 6, // Solaris 168 ELFOSABI_AIX = 7, // AIX 169 ELFOSABI_IRIX = 8, // IRIX 170 ELFOSABI_FREEBSD = 9, // FreeBSD 171 ELFOSABI_TRU64 = 10, // TRU64 UNIX 172 ELFOSABI_MODESTO = 11, // Novell Modesto 173 ELFOSABI_OPENBSD = 12, // OpenBSD 174 ELFOSABI_OPENVMS = 13, // OpenVMS 175 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel 176 ELFOSABI_AROS = 15, // AROS 177 ELFOSABI_FENIXOS = 16, // FenixOS 178 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000 179 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000 180 ELFOSABI_ARM = 97, // ARM 181 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application 182}; 183 184// X86_64 relocations. 185enum { 186 R_X86_64_NONE = 0, 187 R_X86_64_64 = 1, 188 R_X86_64_PC32 = 2, 189 R_X86_64_GOT32 = 3, 190 R_X86_64_PLT32 = 4, 191 R_X86_64_COPY = 5, 192 R_X86_64_GLOB_DAT = 6, 193 R_X86_64_JUMP_SLOT = 7, 194 R_X86_64_RELATIVE = 8, 195 R_X86_64_GOTPCREL = 9, 196 R_X86_64_32 = 10, 197 R_X86_64_32S = 11, 198 R_X86_64_16 = 12, 199 R_X86_64_PC16 = 13, 200 R_X86_64_8 = 14, 201 R_X86_64_PC8 = 15, 202 R_X86_64_DTPMOD64 = 16, 203 R_X86_64_DTPOFF64 = 17, 204 R_X86_64_TPOFF64 = 18, 205 R_X86_64_TLSGD = 19, 206 R_X86_64_TLSLD = 20, 207 R_X86_64_DTPOFF32 = 21, 208 R_X86_64_GOTTPOFF = 22, 209 R_X86_64_TPOFF32 = 23, 210 R_X86_64_PC64 = 24, 211 R_X86_64_GOTOFF64 = 25, 212 R_X86_64_GOTPC32 = 26, 213 R_X86_64_SIZE32 = 32, 214 R_X86_64_SIZE64 = 33, 215 R_X86_64_GOTPC32_TLSDESC = 34, 216 R_X86_64_TLSDESC_CALL = 35, 217 R_X86_64_TLSDESC = 36 218}; 219 220// i386 relocations. 221// TODO: this is just a subset 222enum { 223 R_386_NONE = 0, 224 R_386_32 = 1, 225 R_386_PC32 = 2, 226 R_386_GOT32 = 3, 227 R_386_PLT32 = 4, 228 R_386_COPY = 5, 229 R_386_GLOB_DAT = 6, 230 R_386_JUMP_SLOT = 7, 231 R_386_RELATIVE = 8, 232 R_386_GOTOFF = 9, 233 R_386_GOTPC = 10, 234 R_386_32PLT = 11, 235 R_386_16 = 20, 236 R_386_PC16 = 21, 237 R_386_8 = 22, 238 R_386_PC8 = 23 239}; 240 241// Section header. 242struct Elf32_Shdr { 243 Elf32_Word sh_name; // Section name (index into string table) 244 Elf32_Word sh_type; // Section type (SHT_*) 245 Elf32_Word sh_flags; // Section flags (SHF_*) 246 Elf32_Addr sh_addr; // Address where section is to be loaded 247 Elf32_Off sh_offset; // File offset of section data, in bytes 248 Elf32_Word sh_size; // Size of section, in bytes 249 Elf32_Word sh_link; // Section type-specific header table index link 250 Elf32_Word sh_info; // Section type-specific extra information 251 Elf32_Word sh_addralign; // Section address alignment 252 Elf32_Word sh_entsize; // Size of records contained within the section 253}; 254 255// Section header for ELF64 - same fields as ELF32, different types. 256struct Elf64_Shdr { 257 Elf64_Half sh_name; 258 Elf64_Half sh_type; 259 Elf64_Xword sh_flags; 260 Elf64_Addr sh_addr; 261 Elf64_Off sh_offset; 262 Elf64_Xword sh_size; 263 Elf64_Half sh_link; 264 Elf64_Half sh_info; 265 Elf64_Xword sh_addralign; 266 Elf64_Xword sh_entsize; 267}; 268 269// Special section indices. 270enum { 271 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless 272 SHN_LORESERVE = 0xff00, // Lowest reserved index 273 SHN_LOPROC = 0xff00, // Lowest processor-specific index 274 SHN_HIPROC = 0xff1f, // Highest processor-specific index 275 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation 276 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables 277 SHN_HIRESERVE = 0xffff // Highest reserved index 278}; 279 280// Section types. 281enum { 282 SHT_NULL = 0, // No associated section (inactive entry). 283 SHT_PROGBITS = 1, // Program-defined contents. 284 SHT_SYMTAB = 2, // Symbol table. 285 SHT_STRTAB = 3, // String table. 286 SHT_RELA = 4, // Relocation entries; explicit addends. 287 SHT_HASH = 5, // Symbol hash table. 288 SHT_DYNAMIC = 6, // Information for dynamic linking. 289 SHT_NOTE = 7, // Information about the file. 290 SHT_NOBITS = 8, // Data occupies no space in the file. 291 SHT_REL = 9, // Relocation entries; no explicit addends. 292 SHT_SHLIB = 10, // Reserved. 293 SHT_DYNSYM = 11, // Symbol table. 294 SHT_INIT_ARRAY = 14, // Pointers to initialisation functions. 295 SHT_FINI_ARRAY = 15, // Pointers to termination functions. 296 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions. 297 SHT_GROUP = 17, // Section group. 298 SHT_SYMTAB_SHNDX = 18, // Indicies for SHN_XINDEX entries. 299 SHT_LOOS = 0x60000000, // Lowest operating system-specific type. 300 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type. 301 SHT_LOPROC = 0x70000000, // Lowest processor architecture-specific type. 302 // Fixme: All this is duplicated in MCSectionELF. Why?? 303 // Exception Index table 304 SHT_ARM_EXIDX = 0x70000001U, 305 // BPABI DLL dynamic linking pre-emption map 306 SHT_ARM_PREEMPTMAP = 0x70000002U, 307 // Object file compatibility attributes 308 SHT_ARM_ATTRIBUTES = 0x70000003U, 309 SHT_ARM_DEBUGOVERLAY = 0x70000004U, 310 SHT_ARM_OVERLAYSECTION = 0x70000005U, 311 312 SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type. 313 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. 314 SHT_HIUSER = 0xffffffff // Highest type reserved for applications. 315}; 316 317// Section flags. 318enum { 319 SHF_WRITE = 0x1, // Section data should be writable during execution. 320 SHF_ALLOC = 0x2, // Section occupies memory during program execution. 321 SHF_EXECINSTR = 0x4, // Section contains executable machine instructions. 322 SHF_MASKPROC = 0xf0000000 // Bits indicating processor-specific flags. 323}; 324 325// Symbol table entries for ELF32. 326struct Elf32_Sym { 327 Elf32_Word st_name; // Symbol name (index into string table) 328 Elf32_Addr st_value; // Value or address associated with the symbol 329 Elf32_Word st_size; // Size of the symbol 330 unsigned char st_info; // Symbol's type and binding attributes 331 unsigned char st_other; // Must be zero; reserved 332 Elf32_Half st_shndx; // Which section (header table index) it's defined in 333 334 // These accessors and mutators correspond to the ELF32_ST_BIND, 335 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 336 unsigned char getBinding() const { return st_info >> 4; } 337 unsigned char getType() const { return st_info & 0x0f; } 338 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 339 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 340 void setBindingAndType(unsigned char b, unsigned char t) { 341 st_info = (b << 4) + (t & 0x0f); 342 } 343}; 344 345// Symbol table entries for ELF64. 346struct Elf64_Sym { 347 Elf64_Word st_name; // Symbol name (index into string table) 348 unsigned char st_info; // Symbol's type and binding attributes 349 unsigned char st_other; // Must be zero; reserved 350 Elf64_Half st_shndx; // Which section (header table index) it's defined in 351 Elf64_Addr st_value; // Value or address associated with the symbol 352 Elf64_Xword st_size; // Size of the symbol 353 354 // These accessors and mutators are identical to those defined for ELF32 355 // symbol table entries. 356 unsigned char getBinding() const { return st_info >> 4; } 357 unsigned char getType() const { return st_info & 0x0f; } 358 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 359 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 360 void setBindingAndType(unsigned char b, unsigned char t) { 361 st_info = (b << 4) + (t & 0x0f); 362 } 363}; 364 365// The size (in bytes) of symbol table entries. 366enum { 367 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size 368 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size. 369}; 370 371// Symbol bindings. 372enum { 373 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def 374 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined 375 STB_WEAK = 2, // Weak symbol, like global but lower-precedence 376 STB_LOPROC = 13, // Lowest processor-specific binding type 377 STB_HIPROC = 15 // Highest processor-specific binding type 378}; 379 380// Symbol types. 381enum { 382 STT_NOTYPE = 0, // Symbol's type is not specified 383 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) 384 STT_FUNC = 2, // Symbol is executable code (function, etc.) 385 STT_SECTION = 3, // Symbol refers to a section 386 STT_FILE = 4, // Local, absolute symbol that refers to a file 387 STT_COMMON = 5, // An uninitialised common block 388 STT_TLS = 6, // Thread local data object 389 STT_LOPROC = 13, // Lowest processor-specific symbol type 390 STT_HIPROC = 15 // Highest processor-specific symbol type 391}; 392 393enum { 394 STV_DEFAULT = 0, // Visibility is specified by binding type 395 STV_INTERNAL = 1, // Defined by processor supplements 396 STV_HIDDEN = 2, // Not visible to other components 397 STV_PROTECTED = 3 // Visible in other components but not preemptable 398}; 399 400// Relocation entry, without explicit addend. 401struct Elf32_Rel { 402 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 403 Elf32_Word r_info; // Symbol table index and type of relocation to apply 404 405 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 406 // and ELF32_R_INFO macros defined in the ELF specification: 407 Elf32_Word getSymbol() const { return (r_info >> 8); } 408 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 409 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 410 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 411 void setSymbolAndType(Elf32_Word s, unsigned char t) { 412 r_info = (s << 8) + t; 413 } 414}; 415 416// Relocation entry with explicit addend. 417struct Elf32_Rela { 418 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 419 Elf32_Word r_info; // Symbol table index and type of relocation to apply 420 Elf32_Sword r_addend; // Compute value for relocatable field by adding this 421 422 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 423 // and ELF32_R_INFO macros defined in the ELF specification: 424 Elf32_Word getSymbol() const { return (r_info >> 8); } 425 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 426 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 427 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 428 void setSymbolAndType(Elf32_Word s, unsigned char t) { 429 r_info = (s << 8) + t; 430 } 431}; 432 433// Relocation entry, without explicit addend. 434struct Elf64_Rel { 435 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 436 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 437 438 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 439 // and ELF64_R_INFO macros defined in the ELF specification: 440 Elf64_Xword getSymbol() const { return (r_info >> 32); } 441 unsigned char getType() const { 442 return (unsigned char) (r_info & 0xffffffffL); 443 } 444 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 445 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 446 void setSymbolAndType(Elf64_Xword s, unsigned char t) { 447 r_info = (s << 32) + (t&0xffffffffL); 448 } 449}; 450 451// Relocation entry with explicit addend. 452struct Elf64_Rela { 453 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 454 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 455 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this. 456 457 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 458 // and ELF64_R_INFO macros defined in the ELF specification: 459 Elf64_Xword getSymbol() const { return (r_info >> 32); } 460 unsigned char getType() const { 461 return (unsigned char) (r_info & 0xffffffffL); 462 } 463 void setSymbol(Elf64_Xword s) { setSymbolAndType(s, getType()); } 464 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 465 void setSymbolAndType(Elf64_Xword s, unsigned char t) { 466 r_info = (s << 32) + (t&0xffffffffL); 467 } 468}; 469 470// Program header for ELF32. 471struct Elf32_Phdr { 472 Elf32_Word p_type; // Type of segment 473 Elf32_Off p_offset; // File offset where segment is located, in bytes 474 Elf32_Addr p_vaddr; // Virtual address of beginning of segment 475 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 476 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 477 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 478 Elf32_Word p_flags; // Segment flags 479 Elf32_Word p_align; // Segment alignment constraint 480}; 481 482// Program header for ELF64. 483struct Elf64_Phdr { 484 Elf64_Word p_type; // Type of segment 485 Elf64_Word p_flags; // Segment flags 486 Elf64_Off p_offset; // File offset where segment is located, in bytes 487 Elf64_Addr p_vaddr; // Virtual address of beginning of segment 488 Elf64_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 489 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 490 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 491 Elf64_Xword p_align; // Segment alignment constraint 492}; 493 494// Segment types. 495enum { 496 PT_NULL = 0, // Unused segment. 497 PT_LOAD = 1, // Loadable segment. 498 PT_DYNAMIC = 2, // Dynamic linking information. 499 PT_INTERP = 3, // Interpreter pathname. 500 PT_NOTE = 4, // Auxiliary information. 501 PT_SHLIB = 5, // Reserved. 502 PT_PHDR = 6, // The program header table itself. 503 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. 504 PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type. 505}; 506 507// Segment flag bits. 508enum { 509 PF_X = 1, // Execute 510 PF_W = 2, // Write 511 PF_R = 4, // Read 512 PF_MASKPROC = 0xf0000000 // Unspecified 513}; 514 515// Dynamic table entry for ELF32. 516struct Elf32_Dyn 517{ 518 Elf32_Sword d_tag; // Type of dynamic table entry. 519 union 520 { 521 Elf32_Word d_val; // Integer value of entry. 522 Elf32_Addr d_ptr; // Pointer value of entry. 523 } d_un; 524}; 525 526// Dynamic table entry for ELF64. 527struct Elf64_Dyn 528{ 529 Elf64_Sxword d_tag; // Type of dynamic table entry. 530 union 531 { 532 Elf64_Xword d_val; // Integer value of entry. 533 Elf64_Addr d_ptr; // Pointer value of entry. 534 } d_un; 535}; 536 537// Dynamic table entry tags. 538enum { 539 DT_NULL = 0, // Marks end of dynamic array. 540 DT_NEEDED = 1, // String table offset of needed library. 541 DT_PLTRELSZ = 2, // Size of relocation entries in PLT. 542 DT_PLTGOT = 3, // Address associated with linkage table. 543 DT_HASH = 4, // Address of symbolic hash table. 544 DT_STRTAB = 5, // Address of dynamic string table. 545 DT_SYMTAB = 6, // Address of dynamic symbol table. 546 DT_RELA = 7, // Address of relocation table (Rela entries). 547 DT_RELASZ = 8, // Size of Rela relocation table. 548 DT_RELAENT = 9, // Size of a Rela relocation entry. 549 DT_STRSZ = 10, // Total size of the string table. 550 DT_SYMENT = 11, // Size of a symbol table entry. 551 DT_INIT = 12, // Address of initialization function. 552 DT_FINI = 13, // Address of termination function. 553 DT_SONAME = 14, // String table offset of a shared objects name. 554 DT_RPATH = 15, // String table offset of library search path. 555 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm. 556 DT_REL = 17, // Address of relocation table (Rel entries). 557 DT_RELSZ = 18, // Size of Rel relocation table. 558 DT_RELENT = 19, // Size of a Rel relocation entry. 559 DT_PLTREL = 20, // Type of relocation entry used for linking. 560 DT_DEBUG = 21, // Reserved for debugger. 561 DT_TEXTREL = 22, // Relocations exist for non-writable segements. 562 DT_JMPREL = 23, // Address of relocations associated with PLT. 563 DT_BIND_NOW = 24, // Process all relocations before execution. 564 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions. 565 DT_FINI_ARRAY = 26, // Pointer to array of termination functions. 566 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY. 567 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY. 568 DT_LOOS = 0x60000000, // Start of environment specific tags. 569 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags. 570 DT_LOPROC = 0x70000000, // Start of processor specific tags. 571 DT_HIPROC = 0x7FFFFFFF // End of processor specific tags. 572}; 573 574} // end namespace ELF 575 576} // end namespace llvm 577 578#endif 579