ELF.h revision dceaf4ac8dcb2167b57853d354760fe9a8cb8273
1//===- ELF.h - ELF object file implementation -------------------*- 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 file declares the ELFObjectFile template class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_OBJECT_ELF_H 15#define LLVM_OBJECT_ELF_H 16 17#include "llvm/ADT/DenseMap.h" 18#include "llvm/ADT/PointerIntPair.h" 19#include "llvm/ADT/SmallVector.h" 20#include "llvm/ADT/StringSwitch.h" 21#include "llvm/ADT/Triple.h" 22#include "llvm/Object/ObjectFile.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/ELF.h" 25#include "llvm/Support/Endian.h" 26#include "llvm/Support/ErrorHandling.h" 27#include "llvm/Support/MemoryBuffer.h" 28#include "llvm/Support/raw_ostream.h" 29#include <algorithm> 30#include <limits> 31#include <utility> 32 33namespace llvm { 34namespace object { 35 36using support::endianness; 37 38template<endianness target_endianness, std::size_t max_alignment, bool is64Bits> 39struct ELFType { 40 static const endianness TargetEndianness = target_endianness; 41 static const std::size_t MaxAlignment = max_alignment; 42 static const bool Is64Bits = is64Bits; 43}; 44 45template<typename T, int max_align> 46struct MaximumAlignment { 47 enum {value = AlignOf<T>::Alignment > max_align ? max_align 48 : AlignOf<T>::Alignment}; 49}; 50 51// Subclasses of ELFObjectFile may need this for template instantiation 52inline std::pair<unsigned char, unsigned char> 53getElfArchType(MemoryBuffer *Object) { 54 if (Object->getBufferSize() < ELF::EI_NIDENT) 55 return std::make_pair((uint8_t)ELF::ELFCLASSNONE,(uint8_t)ELF::ELFDATANONE); 56 return std::make_pair( (uint8_t)Object->getBufferStart()[ELF::EI_CLASS] 57 , (uint8_t)Object->getBufferStart()[ELF::EI_DATA]); 58} 59 60// Templates to choose Elf_Addr and Elf_Off depending on is64Bits. 61template<endianness target_endianness, std::size_t max_alignment> 62struct ELFDataTypeTypedefHelperCommon { 63 typedef support::detail::packed_endian_specific_integral 64 <uint16_t, target_endianness, 65 MaximumAlignment<uint16_t, max_alignment>::value> Elf_Half; 66 typedef support::detail::packed_endian_specific_integral 67 <uint32_t, target_endianness, 68 MaximumAlignment<uint32_t, max_alignment>::value> Elf_Word; 69 typedef support::detail::packed_endian_specific_integral 70 <int32_t, target_endianness, 71 MaximumAlignment<int32_t, max_alignment>::value> Elf_Sword; 72 typedef support::detail::packed_endian_specific_integral 73 <uint64_t, target_endianness, 74 MaximumAlignment<uint64_t, max_alignment>::value> Elf_Xword; 75 typedef support::detail::packed_endian_specific_integral 76 <int64_t, target_endianness, 77 MaximumAlignment<int64_t, max_alignment>::value> Elf_Sxword; 78}; 79 80template<class ELFT> 81struct ELFDataTypeTypedefHelper; 82 83/// ELF 32bit types. 84template<template<endianness, std::size_t, bool> class ELFT, 85 endianness TargetEndianness, std::size_t MaxAlign> 86struct ELFDataTypeTypedefHelper<ELFT<TargetEndianness, MaxAlign, false> > 87 : ELFDataTypeTypedefHelperCommon<TargetEndianness, MaxAlign> { 88 typedef uint32_t value_type; 89 typedef support::detail::packed_endian_specific_integral 90 <value_type, TargetEndianness, 91 MaximumAlignment<value_type, MaxAlign>::value> Elf_Addr; 92 typedef support::detail::packed_endian_specific_integral 93 <value_type, TargetEndianness, 94 MaximumAlignment<value_type, MaxAlign>::value> Elf_Off; 95}; 96 97/// ELF 64bit types. 98template<template<endianness, std::size_t, bool> class ELFT, 99 endianness TargetEndianness, std::size_t MaxAlign> 100struct ELFDataTypeTypedefHelper<ELFT<TargetEndianness, MaxAlign, true> > 101 : ELFDataTypeTypedefHelperCommon<TargetEndianness, MaxAlign> { 102 typedef uint64_t value_type; 103 typedef support::detail::packed_endian_specific_integral 104 <value_type, TargetEndianness, 105 MaximumAlignment<value_type, MaxAlign>::value> Elf_Addr; 106 typedef support::detail::packed_endian_specific_integral 107 <value_type, TargetEndianness, 108 MaximumAlignment<value_type, MaxAlign>::value> Elf_Off; 109}; 110 111// I really don't like doing this, but the alternative is copypasta. 112#define LLVM_ELF_IMPORT_TYPES(ELFT) \ 113typedef typename ELFDataTypeTypedefHelper <ELFT>::Elf_Addr Elf_Addr; \ 114typedef typename ELFDataTypeTypedefHelper <ELFT>::Elf_Off Elf_Off; \ 115typedef typename ELFDataTypeTypedefHelper <ELFT>::Elf_Half Elf_Half; \ 116typedef typename ELFDataTypeTypedefHelper <ELFT>::Elf_Word Elf_Word; \ 117typedef typename ELFDataTypeTypedefHelper <ELFT>::Elf_Sword Elf_Sword; \ 118typedef typename ELFDataTypeTypedefHelper <ELFT>::Elf_Xword Elf_Xword; \ 119typedef typename ELFDataTypeTypedefHelper <ELFT>::Elf_Sxword Elf_Sxword; 120 121// This is required to get template types into a macro :( 122#define LLVM_ELF_COMMA , 123 124 // Section header. 125template<class ELFT> 126struct Elf_Shdr_Base; 127 128template<template<endianness, std::size_t, bool> class ELFT, 129 endianness TargetEndianness, std::size_t MaxAlign> 130struct Elf_Shdr_Base<ELFT<TargetEndianness, MaxAlign, false> > { 131 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 132 MaxAlign LLVM_ELF_COMMA false>) 133 Elf_Word sh_name; // Section name (index into string table) 134 Elf_Word sh_type; // Section type (SHT_*) 135 Elf_Word sh_flags; // Section flags (SHF_*) 136 Elf_Addr sh_addr; // Address where section is to be loaded 137 Elf_Off sh_offset; // File offset of section data, in bytes 138 Elf_Word sh_size; // Size of section, in bytes 139 Elf_Word sh_link; // Section type-specific header table index link 140 Elf_Word sh_info; // Section type-specific extra information 141 Elf_Word sh_addralign;// Section address alignment 142 Elf_Word sh_entsize; // Size of records contained within the section 143}; 144 145template<template<endianness, std::size_t, bool> class ELFT, 146 endianness TargetEndianness, std::size_t MaxAlign> 147struct Elf_Shdr_Base<ELFT<TargetEndianness, MaxAlign, true> > { 148 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 149 MaxAlign LLVM_ELF_COMMA true>) 150 Elf_Word sh_name; // Section name (index into string table) 151 Elf_Word sh_type; // Section type (SHT_*) 152 Elf_Xword sh_flags; // Section flags (SHF_*) 153 Elf_Addr sh_addr; // Address where section is to be loaded 154 Elf_Off sh_offset; // File offset of section data, in bytes 155 Elf_Xword sh_size; // Size of section, in bytes 156 Elf_Word sh_link; // Section type-specific header table index link 157 Elf_Word sh_info; // Section type-specific extra information 158 Elf_Xword sh_addralign;// Section address alignment 159 Elf_Xword sh_entsize; // Size of records contained within the section 160}; 161 162template<class ELFT> 163struct Elf_Shdr_Impl : Elf_Shdr_Base<ELFT> { 164 using Elf_Shdr_Base<ELFT>::sh_entsize; 165 using Elf_Shdr_Base<ELFT>::sh_size; 166 167 /// @brief Get the number of entities this section contains if it has any. 168 unsigned getEntityCount() const { 169 if (sh_entsize == 0) 170 return 0; 171 return sh_size / sh_entsize; 172 } 173}; 174 175template<class ELFT> 176struct Elf_Sym_Base; 177 178template<template<endianness, std::size_t, bool> class ELFT, 179 endianness TargetEndianness, std::size_t MaxAlign> 180struct Elf_Sym_Base<ELFT<TargetEndianness, MaxAlign, false> > { 181 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 182 MaxAlign LLVM_ELF_COMMA false>) 183 Elf_Word st_name; // Symbol name (index into string table) 184 Elf_Addr st_value; // Value or address associated with the symbol 185 Elf_Word st_size; // Size of the symbol 186 unsigned char st_info; // Symbol's type and binding attributes 187 unsigned char st_other; // Must be zero; reserved 188 Elf_Half st_shndx; // Which section (header table index) it's defined in 189}; 190 191template<template<endianness, std::size_t, bool> class ELFT, 192 endianness TargetEndianness, std::size_t MaxAlign> 193struct Elf_Sym_Base<ELFT<TargetEndianness, MaxAlign, true> > { 194 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 195 MaxAlign LLVM_ELF_COMMA true>) 196 Elf_Word st_name; // Symbol name (index into string table) 197 unsigned char st_info; // Symbol's type and binding attributes 198 unsigned char st_other; // Must be zero; reserved 199 Elf_Half st_shndx; // Which section (header table index) it's defined in 200 Elf_Addr st_value; // Value or address associated with the symbol 201 Elf_Xword st_size; // Size of the symbol 202}; 203 204template<class ELFT> 205struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> { 206 using Elf_Sym_Base<ELFT>::st_info; 207 208 // These accessors and mutators correspond to the ELF32_ST_BIND, 209 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 210 unsigned char getBinding() const { return st_info >> 4; } 211 unsigned char getType() const { return st_info & 0x0f; } 212 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 213 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 214 void setBindingAndType(unsigned char b, unsigned char t) { 215 st_info = (b << 4) + (t & 0x0f); 216 } 217}; 218 219/// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section 220/// (.gnu.version). This structure is identical for ELF32 and ELF64. 221template<class ELFT> 222struct Elf_Versym_Impl { 223 LLVM_ELF_IMPORT_TYPES(ELFT) 224 Elf_Half vs_index; // Version index with flags (e.g. VERSYM_HIDDEN) 225}; 226 227template<class ELFT> 228struct Elf_Verdaux_Impl; 229 230/// Elf_Verdef: This is the structure of entries in the SHT_GNU_verdef section 231/// (.gnu.version_d). This structure is identical for ELF32 and ELF64. 232template<class ELFT> 233struct Elf_Verdef_Impl { 234 LLVM_ELF_IMPORT_TYPES(ELFT) 235 typedef Elf_Verdaux_Impl<ELFT> Elf_Verdaux; 236 Elf_Half vd_version; // Version of this structure (e.g. VER_DEF_CURRENT) 237 Elf_Half vd_flags; // Bitwise flags (VER_DEF_*) 238 Elf_Half vd_ndx; // Version index, used in .gnu.version entries 239 Elf_Half vd_cnt; // Number of Verdaux entries 240 Elf_Word vd_hash; // Hash of name 241 Elf_Word vd_aux; // Offset to the first Verdaux entry (in bytes) 242 Elf_Word vd_next; // Offset to the next Verdef entry (in bytes) 243 244 /// Get the first Verdaux entry for this Verdef. 245 const Elf_Verdaux *getAux() const { 246 return reinterpret_cast<const Elf_Verdaux*>((const char*)this + vd_aux); 247 } 248}; 249 250/// Elf_Verdaux: This is the structure of auxiliary data in the SHT_GNU_verdef 251/// section (.gnu.version_d). This structure is identical for ELF32 and ELF64. 252template<class ELFT> 253struct Elf_Verdaux_Impl { 254 LLVM_ELF_IMPORT_TYPES(ELFT) 255 Elf_Word vda_name; // Version name (offset in string table) 256 Elf_Word vda_next; // Offset to next Verdaux entry (in bytes) 257}; 258 259/// Elf_Verneed: This is the structure of entries in the SHT_GNU_verneed 260/// section (.gnu.version_r). This structure is identical for ELF32 and ELF64. 261template<class ELFT> 262struct Elf_Verneed_Impl { 263 LLVM_ELF_IMPORT_TYPES(ELFT) 264 Elf_Half vn_version; // Version of this structure (e.g. VER_NEED_CURRENT) 265 Elf_Half vn_cnt; // Number of associated Vernaux entries 266 Elf_Word vn_file; // Library name (string table offset) 267 Elf_Word vn_aux; // Offset to first Vernaux entry (in bytes) 268 Elf_Word vn_next; // Offset to next Verneed entry (in bytes) 269}; 270 271/// Elf_Vernaux: This is the structure of auxiliary data in SHT_GNU_verneed 272/// section (.gnu.version_r). This structure is identical for ELF32 and ELF64. 273template<class ELFT> 274struct Elf_Vernaux_Impl { 275 LLVM_ELF_IMPORT_TYPES(ELFT) 276 Elf_Word vna_hash; // Hash of dependency name 277 Elf_Half vna_flags; // Bitwise Flags (VER_FLAG_*) 278 Elf_Half vna_other; // Version index, used in .gnu.version entries 279 Elf_Word vna_name; // Dependency name 280 Elf_Word vna_next; // Offset to next Vernaux entry (in bytes) 281}; 282 283/// Elf_Dyn_Base: This structure matches the form of entries in the dynamic 284/// table section (.dynamic) look like. 285template<class ELFT> 286struct Elf_Dyn_Base; 287 288template<template<endianness, std::size_t, bool> class ELFT, 289 endianness TargetEndianness, std::size_t MaxAlign> 290struct Elf_Dyn_Base<ELFT<TargetEndianness, MaxAlign, false> > { 291 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 292 MaxAlign LLVM_ELF_COMMA false>) 293 Elf_Sword d_tag; 294 union { 295 Elf_Word d_val; 296 Elf_Addr d_ptr; 297 } d_un; 298}; 299 300template<template<endianness, std::size_t, bool> class ELFT, 301 endianness TargetEndianness, std::size_t MaxAlign> 302struct Elf_Dyn_Base<ELFT<TargetEndianness, MaxAlign, true> > { 303 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 304 MaxAlign LLVM_ELF_COMMA true>) 305 Elf_Sxword d_tag; 306 union { 307 Elf_Xword d_val; 308 Elf_Addr d_ptr; 309 } d_un; 310}; 311 312/// Elf_Dyn_Impl: This inherits from Elf_Dyn_Base, adding getters and setters. 313template<class ELFT> 314struct Elf_Dyn_Impl : Elf_Dyn_Base<ELFT> { 315 using Elf_Dyn_Base<ELFT>::d_tag; 316 using Elf_Dyn_Base<ELFT>::d_un; 317 int64_t getTag() const { return d_tag; } 318 uint64_t getVal() const { return d_un.d_val; } 319 uint64_t getPtr() const { return d_un.ptr; } 320}; 321 322// Elf_Rel: Elf Relocation 323template<class ELFT, bool isRela> 324struct Elf_Rel_Base; 325 326template<template<endianness, std::size_t, bool> class ELFT, 327 endianness TargetEndianness, std::size_t MaxAlign> 328struct Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, false>, false> { 329 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 330 MaxAlign LLVM_ELF_COMMA false>) 331 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) 332 Elf_Word r_info; // Symbol table index and type of relocation to apply 333}; 334 335template<template<endianness, std::size_t, bool> class ELFT, 336 endianness TargetEndianness, std::size_t MaxAlign> 337struct Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, true>, false> { 338 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 339 MaxAlign LLVM_ELF_COMMA true>) 340 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) 341 Elf_Xword r_info; // Symbol table index and type of relocation to apply 342}; 343 344template<template<endianness, std::size_t, bool> class ELFT, 345 endianness TargetEndianness, std::size_t MaxAlign> 346struct Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, false>, true> { 347 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 348 MaxAlign LLVM_ELF_COMMA false>) 349 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) 350 Elf_Word r_info; // Symbol table index and type of relocation to apply 351 Elf_Sword r_addend; // Compute value for relocatable field by adding this 352}; 353 354template<template<endianness, std::size_t, bool> class ELFT, 355 endianness TargetEndianness, std::size_t MaxAlign> 356struct Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, true>, true> { 357 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 358 MaxAlign LLVM_ELF_COMMA true>) 359 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) 360 Elf_Xword r_info; // Symbol table index and type of relocation to apply 361 Elf_Sxword r_addend; // Compute value for relocatable field by adding this. 362}; 363 364template<class ELFT, bool isRela> 365struct Elf_Rel_Impl; 366 367template<template<endianness, std::size_t, bool> class ELFT, 368 endianness TargetEndianness, std::size_t MaxAlign, bool isRela> 369struct Elf_Rel_Impl<ELFT<TargetEndianness, MaxAlign, true>, isRela> 370 : Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, true>, isRela> { 371 using Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, true>, isRela>::r_info; 372 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 373 MaxAlign LLVM_ELF_COMMA true>) 374 375 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 376 // and ELF64_R_INFO macros defined in the ELF specification: 377 uint32_t getSymbol() const { return (uint32_t) (r_info >> 32); } 378 uint32_t getType() const { 379 return (uint32_t) (r_info & 0xffffffffL); 380 } 381 void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); } 382 void setType(uint32_t t) { setSymbolAndType(getSymbol(), t); } 383 void setSymbolAndType(uint32_t s, uint32_t t) { 384 r_info = ((uint64_t)s << 32) + (t&0xffffffffL); 385 } 386}; 387 388template<template<endianness, std::size_t, bool> class ELFT, 389 endianness TargetEndianness, std::size_t MaxAlign, bool isRela> 390struct Elf_Rel_Impl<ELFT<TargetEndianness, MaxAlign, false>, isRela> 391 : Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, false>, isRela> { 392 using Elf_Rel_Base<ELFT<TargetEndianness, MaxAlign, false>, isRela>::r_info; 393 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 394 MaxAlign LLVM_ELF_COMMA false>) 395 396 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 397 // and ELF32_R_INFO macros defined in the ELF specification: 398 uint32_t getSymbol() const { return (r_info >> 8); } 399 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 400 void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); } 401 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 402 void setSymbolAndType(uint32_t s, unsigned char t) { 403 r_info = (s << 8) + t; 404 } 405}; 406 407template<class ELFT> 408struct Elf_Ehdr_Impl { 409 LLVM_ELF_IMPORT_TYPES(ELFT) 410 unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes 411 Elf_Half e_type; // Type of file (see ET_*) 412 Elf_Half e_machine; // Required architecture for this file (see EM_*) 413 Elf_Word e_version; // Must be equal to 1 414 Elf_Addr e_entry; // Address to jump to in order to start program 415 Elf_Off e_phoff; // Program header table's file offset, in bytes 416 Elf_Off e_shoff; // Section header table's file offset, in bytes 417 Elf_Word e_flags; // Processor-specific flags 418 Elf_Half e_ehsize; // Size of ELF header, in bytes 419 Elf_Half e_phentsize;// Size of an entry in the program header table 420 Elf_Half e_phnum; // Number of entries in the program header table 421 Elf_Half e_shentsize;// Size of an entry in the section header table 422 Elf_Half e_shnum; // Number of entries in the section header table 423 Elf_Half e_shstrndx; // Section header table index of section name 424 // string table 425 bool checkMagic() const { 426 return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0; 427 } 428 unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; } 429 unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; } 430}; 431 432template<class ELFT> 433struct Elf_Phdr_Impl; 434 435template<template<endianness, std::size_t, bool> class ELFT, 436 endianness TargetEndianness, std::size_t MaxAlign> 437struct Elf_Phdr_Impl<ELFT<TargetEndianness, MaxAlign, false> > { 438 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 439 MaxAlign LLVM_ELF_COMMA false>) 440 Elf_Word p_type; // Type of segment 441 Elf_Off p_offset; // FileOffset where segment is located, in bytes 442 Elf_Addr p_vaddr; // Virtual Address of beginning of segment 443 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 444 Elf_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 445 Elf_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 446 Elf_Word p_flags; // Segment flags 447 Elf_Word p_align; // Segment alignment constraint 448}; 449 450template<template<endianness, std::size_t, bool> class ELFT, 451 endianness TargetEndianness, std::size_t MaxAlign> 452struct Elf_Phdr_Impl<ELFT<TargetEndianness, MaxAlign, true> > { 453 LLVM_ELF_IMPORT_TYPES(ELFT<TargetEndianness LLVM_ELF_COMMA 454 MaxAlign LLVM_ELF_COMMA true>) 455 Elf_Word p_type; // Type of segment 456 Elf_Word p_flags; // Segment flags 457 Elf_Off p_offset; // FileOffset where segment is located, in bytes 458 Elf_Addr p_vaddr; // Virtual Address of beginning of segment 459 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 460 Elf_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 461 Elf_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 462 Elf_Xword p_align; // Segment alignment constraint 463}; 464 465template<class ELFT> 466class ELFObjectFile : public ObjectFile { 467 LLVM_ELF_IMPORT_TYPES(ELFT) 468 469public: 470 /// \brief Iterate over constant sized entities. 471 template<class EntT> 472 class ELFEntityIterator { 473 public: 474 typedef ptrdiff_t difference_type; 475 typedef EntT value_type; 476 typedef std::random_access_iterator_tag iterator_category; 477 typedef value_type &reference; 478 typedef value_type *pointer; 479 480 /// \brief Default construct iterator. 481 ELFEntityIterator() : EntitySize(0), Current(0) {} 482 ELFEntityIterator(uint64_t EntSize, const char *Start) 483 : EntitySize(EntSize) 484 , Current(Start) {} 485 486 reference operator *() { 487 assert(Current && "Attempted to dereference an invalid iterator!"); 488 return *reinterpret_cast<pointer>(Current); 489 } 490 491 pointer operator ->() { 492 assert(Current && "Attempted to dereference an invalid iterator!"); 493 return reinterpret_cast<pointer>(Current); 494 } 495 496 bool operator ==(const ELFEntityIterator &Other) { 497 return Current == Other.Current; 498 } 499 500 bool operator !=(const ELFEntityIterator &Other) { 501 return !(*this == Other); 502 } 503 504 ELFEntityIterator &operator ++() { 505 assert(Current && "Attempted to increment an invalid iterator!"); 506 Current += EntitySize; 507 return *this; 508 } 509 510 ELFEntityIterator operator ++(int) { 511 ELFEntityIterator Tmp = *this; 512 ++*this; 513 return Tmp; 514 } 515 516 ELFEntityIterator &operator =(const ELFEntityIterator &Other) { 517 EntitySize = Other.EntitySize; 518 Current = Other.Current; 519 return *this; 520 } 521 522 difference_type operator -(const ELFEntityIterator &Other) const { 523 assert(EntitySize == Other.EntitySize && 524 "Subtracting iterators of different EntitiySize!"); 525 return (Current - Other.Current) / EntitySize; 526 } 527 528 const char *get() const { return Current; } 529 530 private: 531 uint64_t EntitySize; 532 const char *Current; 533 }; 534 535 typedef Elf_Ehdr_Impl<ELFT> Elf_Ehdr; 536 typedef Elf_Shdr_Impl<ELFT> Elf_Shdr; 537 typedef Elf_Sym_Impl<ELFT> Elf_Sym; 538 typedef Elf_Dyn_Impl<ELFT> Elf_Dyn; 539 typedef Elf_Phdr_Impl<ELFT> Elf_Phdr; 540 typedef Elf_Rel_Impl<ELFT, false> Elf_Rel; 541 typedef Elf_Rel_Impl<ELFT, true> Elf_Rela; 542 typedef Elf_Verdef_Impl<ELFT> Elf_Verdef; 543 typedef Elf_Verdaux_Impl<ELFT> Elf_Verdaux; 544 typedef Elf_Verneed_Impl<ELFT> Elf_Verneed; 545 typedef Elf_Vernaux_Impl<ELFT> Elf_Vernaux; 546 typedef Elf_Versym_Impl<ELFT> Elf_Versym; 547 typedef ELFEntityIterator<const Elf_Dyn> Elf_Dyn_iterator; 548 typedef ELFEntityIterator<const Elf_Sym> Elf_Sym_iterator; 549 typedef ELFEntityIterator<const Elf_Rela> Elf_Rela_Iter; 550 typedef ELFEntityIterator<const Elf_Rel> Elf_Rel_Iter; 551 552protected: 553 // This flag is used for classof, to distinguish ELFObjectFile from 554 // its subclass. If more subclasses will be created, this flag will 555 // have to become an enum. 556 bool isDyldELFObject; 557 558private: 559 typedef SmallVector<const Elf_Shdr *, 2> Sections_t; 560 typedef DenseMap<unsigned, unsigned> IndexMap_t; 561 typedef DenseMap<const Elf_Shdr*, SmallVector<uint32_t, 1> > RelocMap_t; 562 563 const Elf_Ehdr *Header; 564 const Elf_Shdr *SectionHeaderTable; 565 const Elf_Shdr *dot_shstrtab_sec; // Section header string table. 566 const Elf_Shdr *dot_strtab_sec; // Symbol header string table. 567 const Elf_Shdr *dot_dynstr_sec; // Dynamic symbol string table. 568 569 // SymbolTableSections[0] always points to the dynamic string table section 570 // header, or NULL if there is no dynamic string table. 571 Sections_t SymbolTableSections; 572 IndexMap_t SymbolTableSectionsIndexMap; 573 DenseMap<const Elf_Sym*, ELF::Elf64_Word> ExtendedSymbolTable; 574 575 const Elf_Shdr *dot_dynamic_sec; // .dynamic 576 const Elf_Shdr *dot_gnu_version_sec; // .gnu.version 577 const Elf_Shdr *dot_gnu_version_r_sec; // .gnu.version_r 578 const Elf_Shdr *dot_gnu_version_d_sec; // .gnu.version_d 579 580 // Pointer to SONAME entry in dynamic string table 581 // This is set the first time getLoadName is called. 582 mutable const char *dt_soname; 583 584private: 585 // Records for each version index the corresponding Verdef or Vernaux entry. 586 // This is filled the first time LoadVersionMap() is called. 587 class VersionMapEntry : public PointerIntPair<const void*, 1> { 588 public: 589 // If the integer is 0, this is an Elf_Verdef*. 590 // If the integer is 1, this is an Elf_Vernaux*. 591 VersionMapEntry() : PointerIntPair<const void*, 1>(NULL, 0) { } 592 VersionMapEntry(const Elf_Verdef *verdef) 593 : PointerIntPair<const void*, 1>(verdef, 0) { } 594 VersionMapEntry(const Elf_Vernaux *vernaux) 595 : PointerIntPair<const void*, 1>(vernaux, 1) { } 596 bool isNull() const { return getPointer() == NULL; } 597 bool isVerdef() const { return !isNull() && getInt() == 0; } 598 bool isVernaux() const { return !isNull() && getInt() == 1; } 599 const Elf_Verdef *getVerdef() const { 600 return isVerdef() ? (const Elf_Verdef*)getPointer() : NULL; 601 } 602 const Elf_Vernaux *getVernaux() const { 603 return isVernaux() ? (const Elf_Vernaux*)getPointer() : NULL; 604 } 605 }; 606 mutable SmallVector<VersionMapEntry, 16> VersionMap; 607 void LoadVersionDefs(const Elf_Shdr *sec) const; 608 void LoadVersionNeeds(const Elf_Shdr *ec) const; 609 void LoadVersionMap() const; 610 611 /// @brief Map sections to an array of relocation sections that reference 612 /// them sorted by section index. 613 RelocMap_t SectionRelocMap; 614 615 /// @brief Get the relocation section that contains \a Rel. 616 const Elf_Shdr *getRelSection(DataRefImpl Rel) const { 617 return getSection(Rel.w.b); 618 } 619 620public: 621 bool isRelocationHasAddend(DataRefImpl Rel) const; 622 template<typename T> 623 const T *getEntry(uint16_t Section, uint32_t Entry) const; 624 template<typename T> 625 const T *getEntry(const Elf_Shdr *Section, uint32_t Entry) const; 626 const Elf_Shdr *getSection(DataRefImpl index) const; 627 const Elf_Shdr *getSection(uint32_t index) const; 628 const Elf_Rel *getRel(DataRefImpl Rel) const; 629 const Elf_Rela *getRela(DataRefImpl Rela) const; 630 const char *getString(uint32_t section, uint32_t offset) const; 631 const char *getString(const Elf_Shdr *section, uint32_t offset) const; 632 error_code getSymbolVersion(const Elf_Shdr *section, 633 const Elf_Sym *Symb, 634 StringRef &Version, 635 bool &IsDefault) const; 636 void VerifyStrTab(const Elf_Shdr *sh) const; 637 638protected: 639 const Elf_Sym *getSymbol(DataRefImpl Symb) const; // FIXME: Should be private? 640 void validateSymbol(DataRefImpl Symb) const; 641 642public: 643 error_code getSymbolName(const Elf_Shdr *section, 644 const Elf_Sym *Symb, 645 StringRef &Res) const; 646 error_code getSectionName(const Elf_Shdr *section, 647 StringRef &Res) const; 648 const Elf_Dyn *getDyn(DataRefImpl DynData) const; 649 error_code getSymbolVersion(SymbolRef Symb, StringRef &Version, 650 bool &IsDefault) const; 651 uint64_t getSymbolIndex(const Elf_Sym *sym) const; 652protected: 653 virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const; 654 virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const; 655 virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const; 656 virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const; 657 virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const; 658 virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const; 659 virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const; 660 virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const; 661 virtual error_code getSymbolSection(DataRefImpl Symb, 662 section_iterator &Res) const; 663 virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const; 664 665 virtual error_code getLibraryNext(DataRefImpl Data, LibraryRef &Result) const; 666 virtual error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const; 667 668 virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const; 669 virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const; 670 virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const; 671 virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const; 672 virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const; 673 virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const; 674 virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const; 675 virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const; 676 virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const; 677 virtual error_code isSectionRequiredForExecution(DataRefImpl Sec, 678 bool &Res) const; 679 virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const; 680 virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const; 681 virtual error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const; 682 virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb, 683 bool &Result) const; 684 virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const; 685 virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const; 686 687 virtual error_code getRelocationNext(DataRefImpl Rel, 688 RelocationRef &Res) const; 689 virtual error_code getRelocationAddress(DataRefImpl Rel, 690 uint64_t &Res) const; 691 virtual error_code getRelocationOffset(DataRefImpl Rel, 692 uint64_t &Res) const; 693 virtual error_code getRelocationSymbol(DataRefImpl Rel, 694 SymbolRef &Res) const; 695 virtual error_code getRelocationType(DataRefImpl Rel, 696 uint64_t &Res) const; 697 virtual error_code getRelocationTypeName(DataRefImpl Rel, 698 SmallVectorImpl<char> &Result) const; 699 virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel, 700 int64_t &Res) const; 701 virtual error_code getRelocationValueString(DataRefImpl Rel, 702 SmallVectorImpl<char> &Result) const; 703 704public: 705 ELFObjectFile(MemoryBuffer *Object, error_code &ec); 706 virtual symbol_iterator begin_symbols() const; 707 virtual symbol_iterator end_symbols() const; 708 709 virtual symbol_iterator begin_dynamic_symbols() const; 710 virtual symbol_iterator end_dynamic_symbols() const; 711 712 virtual section_iterator begin_sections() const; 713 virtual section_iterator end_sections() const; 714 715 virtual library_iterator begin_libraries_needed() const; 716 virtual library_iterator end_libraries_needed() const; 717 718 const Elf_Shdr *getDynamicSymbolTableSectionHeader() const { 719 return SymbolTableSections[0]; 720 } 721 722 const Elf_Shdr *getDynamicStringTableSectionHeader() const { 723 return dot_dynstr_sec; 724 } 725 726 Elf_Dyn_iterator begin_dynamic_table() const; 727 /// \param NULLEnd use one past the first DT_NULL entry as the end instead of 728 /// the section size. 729 Elf_Dyn_iterator end_dynamic_table(bool NULLEnd = false) const; 730 731 Elf_Sym_iterator begin_elf_dynamic_symbols() const { 732 const Elf_Shdr *DynSymtab = SymbolTableSections[0]; 733 if (DynSymtab) 734 return Elf_Sym_iterator(DynSymtab->sh_entsize, 735 (const char *)base() + DynSymtab->sh_offset); 736 return Elf_Sym_iterator(0, 0); 737 } 738 739 Elf_Sym_iterator end_elf_dynamic_symbols() const { 740 const Elf_Shdr *DynSymtab = SymbolTableSections[0]; 741 if (DynSymtab) 742 return Elf_Sym_iterator(DynSymtab->sh_entsize, (const char *)base() + 743 DynSymtab->sh_offset + DynSymtab->sh_size); 744 return Elf_Sym_iterator(0, 0); 745 } 746 747 Elf_Rela_Iter beginELFRela(const Elf_Shdr *sec) const { 748 return Elf_Rela_Iter(sec->sh_entsize, 749 (const char *)(base() + sec->sh_offset)); 750 } 751 752 Elf_Rela_Iter endELFRela(const Elf_Shdr *sec) const { 753 return Elf_Rela_Iter(sec->sh_entsize, (const char *) 754 (base() + sec->sh_offset + sec->sh_size)); 755 } 756 757 Elf_Rel_Iter beginELFRel(const Elf_Shdr *sec) const { 758 return Elf_Rel_Iter(sec->sh_entsize, 759 (const char *)(base() + sec->sh_offset)); 760 } 761 762 Elf_Rel_Iter endELFRel(const Elf_Shdr *sec) const { 763 return Elf_Rel_Iter(sec->sh_entsize, (const char *) 764 (base() + sec->sh_offset + sec->sh_size)); 765 } 766 767 /// \brief Iterate over program header table. 768 typedef ELFEntityIterator<const Elf_Phdr> Elf_Phdr_Iter; 769 770 Elf_Phdr_Iter begin_program_headers() const { 771 return Elf_Phdr_Iter(Header->e_phentsize, 772 (const char*)base() + Header->e_phoff); 773 } 774 775 Elf_Phdr_Iter end_program_headers() const { 776 return Elf_Phdr_Iter(Header->e_phentsize, 777 (const char*)base() + 778 Header->e_phoff + 779 (Header->e_phnum * Header->e_phentsize)); 780 } 781 782 virtual uint8_t getBytesInAddress() const; 783 virtual StringRef getFileFormatName() const; 784 virtual StringRef getObjectType() const { return "ELF"; } 785 virtual unsigned getArch() const; 786 virtual StringRef getLoadName() const; 787 virtual error_code getSectionContents(const Elf_Shdr *sec, 788 StringRef &Res) const; 789 790 uint64_t getNumSections() const; 791 uint64_t getStringTableIndex() const; 792 ELF::Elf64_Word getSymbolTableIndex(const Elf_Sym *symb) const; 793 const Elf_Shdr *getSection(const Elf_Sym *symb) const; 794 const Elf_Shdr *getElfSection(section_iterator &It) const; 795 const Elf_Sym *getElfSymbol(symbol_iterator &It) const; 796 const Elf_Sym *getElfSymbol(uint32_t index) const; 797 798 // Methods for type inquiry through isa, cast, and dyn_cast 799 bool isDyldType() const { return isDyldELFObject; } 800 static inline bool classof(const Binary *v) { 801 return v->getType() == getELFType(ELFT::TargetEndianness == support::little, 802 ELFT::Is64Bits); 803 } 804}; 805 806// Iterate through the version definitions, and place each Elf_Verdef 807// in the VersionMap according to its index. 808template<class ELFT> 809void ELFObjectFile<ELFT>::LoadVersionDefs(const Elf_Shdr *sec) const { 810 unsigned vd_size = sec->sh_size; // Size of section in bytes 811 unsigned vd_count = sec->sh_info; // Number of Verdef entries 812 const char *sec_start = (const char*)base() + sec->sh_offset; 813 const char *sec_end = sec_start + vd_size; 814 // The first Verdef entry is at the start of the section. 815 const char *p = sec_start; 816 for (unsigned i = 0; i < vd_count; i++) { 817 if (p + sizeof(Elf_Verdef) > sec_end) 818 report_fatal_error("Section ended unexpectedly while scanning " 819 "version definitions."); 820 const Elf_Verdef *vd = reinterpret_cast<const Elf_Verdef *>(p); 821 if (vd->vd_version != ELF::VER_DEF_CURRENT) 822 report_fatal_error("Unexpected verdef version"); 823 size_t index = vd->vd_ndx & ELF::VERSYM_VERSION; 824 if (index >= VersionMap.size()) 825 VersionMap.resize(index+1); 826 VersionMap[index] = VersionMapEntry(vd); 827 p += vd->vd_next; 828 } 829} 830 831// Iterate through the versions needed section, and place each Elf_Vernaux 832// in the VersionMap according to its index. 833template<class ELFT> 834void ELFObjectFile<ELFT>::LoadVersionNeeds(const Elf_Shdr *sec) const { 835 unsigned vn_size = sec->sh_size; // Size of section in bytes 836 unsigned vn_count = sec->sh_info; // Number of Verneed entries 837 const char *sec_start = (const char*)base() + sec->sh_offset; 838 const char *sec_end = sec_start + vn_size; 839 // The first Verneed entry is at the start of the section. 840 const char *p = sec_start; 841 for (unsigned i = 0; i < vn_count; i++) { 842 if (p + sizeof(Elf_Verneed) > sec_end) 843 report_fatal_error("Section ended unexpectedly while scanning " 844 "version needed records."); 845 const Elf_Verneed *vn = reinterpret_cast<const Elf_Verneed *>(p); 846 if (vn->vn_version != ELF::VER_NEED_CURRENT) 847 report_fatal_error("Unexpected verneed version"); 848 // Iterate through the Vernaux entries 849 const char *paux = p + vn->vn_aux; 850 for (unsigned j = 0; j < vn->vn_cnt; j++) { 851 if (paux + sizeof(Elf_Vernaux) > sec_end) 852 report_fatal_error("Section ended unexpected while scanning auxiliary " 853 "version needed records."); 854 const Elf_Vernaux *vna = reinterpret_cast<const Elf_Vernaux *>(paux); 855 size_t index = vna->vna_other & ELF::VERSYM_VERSION; 856 if (index >= VersionMap.size()) 857 VersionMap.resize(index+1); 858 VersionMap[index] = VersionMapEntry(vna); 859 paux += vna->vna_next; 860 } 861 p += vn->vn_next; 862 } 863} 864 865template<class ELFT> 866void ELFObjectFile<ELFT>::LoadVersionMap() const { 867 // If there is no dynamic symtab or version table, there is nothing to do. 868 if (SymbolTableSections[0] == NULL || dot_gnu_version_sec == NULL) 869 return; 870 871 // Has the VersionMap already been loaded? 872 if (VersionMap.size() > 0) 873 return; 874 875 // The first two version indexes are reserved. 876 // Index 0 is LOCAL, index 1 is GLOBAL. 877 VersionMap.push_back(VersionMapEntry()); 878 VersionMap.push_back(VersionMapEntry()); 879 880 if (dot_gnu_version_d_sec) 881 LoadVersionDefs(dot_gnu_version_d_sec); 882 883 if (dot_gnu_version_r_sec) 884 LoadVersionNeeds(dot_gnu_version_r_sec); 885} 886 887template<class ELFT> 888void ELFObjectFile<ELFT>::validateSymbol(DataRefImpl Symb) const { 889#ifndef NDEBUG 890 const Elf_Sym *symb = getSymbol(Symb); 891 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b]; 892 // FIXME: We really need to do proper error handling in the case of an invalid 893 // input file. Because we don't use exceptions, I think we'll just pass 894 // an error object around. 895 if (!( symb 896 && SymbolTableSection 897 && symb >= (const Elf_Sym*)(base() 898 + SymbolTableSection->sh_offset) 899 && symb < (const Elf_Sym*)(base() 900 + SymbolTableSection->sh_offset 901 + SymbolTableSection->sh_size))) 902 // FIXME: Proper error handling. 903 report_fatal_error("Symb must point to a valid symbol!"); 904#endif 905} 906 907template<class ELFT> 908error_code ELFObjectFile<ELFT>::getSymbolNext(DataRefImpl Symb, 909 SymbolRef &Result) const { 910 validateSymbol(Symb); 911 const Elf_Shdr *SymbolTableSection = SymbolTableSections[Symb.d.b]; 912 913 ++Symb.d.a; 914 // Check to see if we are at the end of this symbol table. 915 if (Symb.d.a >= SymbolTableSection->getEntityCount()) { 916 // We are at the end. If there are other symbol tables, jump to them. 917 // If the symbol table is .dynsym, we are iterating dynamic symbols, 918 // and there is only one table of these. 919 if (Symb.d.b != 0) { 920 ++Symb.d.b; 921 Symb.d.a = 1; // The 0th symbol in ELF is fake. 922 } 923 // Otherwise return the terminator. 924 if (Symb.d.b == 0 || Symb.d.b >= SymbolTableSections.size()) { 925 Symb.d.a = std::numeric_limits<uint32_t>::max(); 926 Symb.d.b = std::numeric_limits<uint32_t>::max(); 927 } 928 } 929 930 Result = SymbolRef(Symb, this); 931 return object_error::success; 932} 933 934template<class ELFT> 935error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb, 936 StringRef &Result) const { 937 validateSymbol(Symb); 938 const Elf_Sym *symb = getSymbol(Symb); 939 return getSymbolName(SymbolTableSections[Symb.d.b], symb, Result); 940} 941 942template<class ELFT> 943error_code ELFObjectFile<ELFT>::getSymbolVersion(SymbolRef SymRef, 944 StringRef &Version, 945 bool &IsDefault) const { 946 DataRefImpl Symb = SymRef.getRawDataRefImpl(); 947 validateSymbol(Symb); 948 const Elf_Sym *symb = getSymbol(Symb); 949 return getSymbolVersion(SymbolTableSections[Symb.d.b], symb, 950 Version, IsDefault); 951} 952 953template<class ELFT> 954ELF::Elf64_Word ELFObjectFile<ELFT> 955 ::getSymbolTableIndex(const Elf_Sym *symb) const { 956 if (symb->st_shndx == ELF::SHN_XINDEX) 957 return ExtendedSymbolTable.lookup(symb); 958 return symb->st_shndx; 959} 960 961template<class ELFT> 962const typename ELFObjectFile<ELFT>::Elf_Shdr * 963ELFObjectFile<ELFT>::getSection(const Elf_Sym *symb) const { 964 if (symb->st_shndx == ELF::SHN_XINDEX) 965 return getSection(ExtendedSymbolTable.lookup(symb)); 966 if (symb->st_shndx >= ELF::SHN_LORESERVE) 967 return 0; 968 return getSection(symb->st_shndx); 969} 970 971template<class ELFT> 972const typename ELFObjectFile<ELFT>::Elf_Shdr * 973ELFObjectFile<ELFT>::getElfSection(section_iterator &It) const { 974 llvm::object::DataRefImpl ShdrRef = It->getRawDataRefImpl(); 975 return reinterpret_cast<const Elf_Shdr *>(ShdrRef.p); 976} 977 978template<class ELFT> 979const typename ELFObjectFile<ELFT>::Elf_Sym * 980ELFObjectFile<ELFT>::getElfSymbol(symbol_iterator &It) const { 981 return getSymbol(It->getRawDataRefImpl()); 982} 983 984template<class ELFT> 985const typename ELFObjectFile<ELFT>::Elf_Sym * 986ELFObjectFile<ELFT>::getElfSymbol(uint32_t index) const { 987 DataRefImpl SymbolData; 988 SymbolData.d.a = index; 989 SymbolData.d.b = 1; 990 return getSymbol(SymbolData); 991} 992 993template<class ELFT> 994error_code ELFObjectFile<ELFT>::getSymbolFileOffset(DataRefImpl Symb, 995 uint64_t &Result) const { 996 validateSymbol(Symb); 997 const Elf_Sym *symb = getSymbol(Symb); 998 const Elf_Shdr *Section; 999 switch (getSymbolTableIndex(symb)) { 1000 case ELF::SHN_COMMON: 1001 // Unintialized symbols have no offset in the object file 1002 case ELF::SHN_UNDEF: 1003 Result = UnknownAddressOrSize; 1004 return object_error::success; 1005 case ELF::SHN_ABS: 1006 Result = symb->st_value; 1007 return object_error::success; 1008 default: Section = getSection(symb); 1009 } 1010 1011 switch (symb->getType()) { 1012 case ELF::STT_SECTION: 1013 Result = Section ? Section->sh_offset : UnknownAddressOrSize; 1014 return object_error::success; 1015 case ELF::STT_FUNC: 1016 case ELF::STT_OBJECT: 1017 case ELF::STT_NOTYPE: 1018 Result = symb->st_value + 1019 (Section ? Section->sh_offset : 0); 1020 return object_error::success; 1021 default: 1022 Result = UnknownAddressOrSize; 1023 return object_error::success; 1024 } 1025} 1026 1027template<class ELFT> 1028error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb, 1029 uint64_t &Result) const { 1030 validateSymbol(Symb); 1031 const Elf_Sym *symb = getSymbol(Symb); 1032 const Elf_Shdr *Section; 1033 switch (getSymbolTableIndex(symb)) { 1034 case ELF::SHN_COMMON: 1035 case ELF::SHN_UNDEF: 1036 Result = UnknownAddressOrSize; 1037 return object_error::success; 1038 case ELF::SHN_ABS: 1039 Result = symb->st_value; 1040 return object_error::success; 1041 default: Section = getSection(symb); 1042 } 1043 1044 switch (symb->getType()) { 1045 case ELF::STT_SECTION: 1046 Result = Section ? Section->sh_addr : UnknownAddressOrSize; 1047 return object_error::success; 1048 case ELF::STT_FUNC: 1049 case ELF::STT_OBJECT: 1050 case ELF::STT_NOTYPE: 1051 bool IsRelocatable; 1052 switch(Header->e_type) { 1053 case ELF::ET_EXEC: 1054 case ELF::ET_DYN: 1055 IsRelocatable = false; 1056 break; 1057 default: 1058 IsRelocatable = true; 1059 } 1060 Result = symb->st_value; 1061 if (IsRelocatable && Section != 0) 1062 Result += Section->sh_addr; 1063 return object_error::success; 1064 default: 1065 Result = UnknownAddressOrSize; 1066 return object_error::success; 1067 } 1068} 1069 1070template<class ELFT> 1071error_code ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Symb, 1072 uint64_t &Result) const { 1073 validateSymbol(Symb); 1074 const Elf_Sym *symb = getSymbol(Symb); 1075 if (symb->st_size == 0) 1076 Result = UnknownAddressOrSize; 1077 Result = symb->st_size; 1078 return object_error::success; 1079} 1080 1081template<class ELFT> 1082error_code ELFObjectFile<ELFT>::getSymbolNMTypeChar(DataRefImpl Symb, 1083 char &Result) const { 1084 validateSymbol(Symb); 1085 const Elf_Sym *symb = getSymbol(Symb); 1086 const Elf_Shdr *Section = getSection(symb); 1087 1088 char ret = '?'; 1089 1090 if (Section) { 1091 switch (Section->sh_type) { 1092 case ELF::SHT_PROGBITS: 1093 case ELF::SHT_DYNAMIC: 1094 switch (Section->sh_flags) { 1095 case (ELF::SHF_ALLOC | ELF::SHF_EXECINSTR): 1096 ret = 't'; break; 1097 case (ELF::SHF_ALLOC | ELF::SHF_WRITE): 1098 ret = 'd'; break; 1099 case ELF::SHF_ALLOC: 1100 case (ELF::SHF_ALLOC | ELF::SHF_MERGE): 1101 case (ELF::SHF_ALLOC | ELF::SHF_MERGE | ELF::SHF_STRINGS): 1102 ret = 'r'; break; 1103 } 1104 break; 1105 case ELF::SHT_NOBITS: ret = 'b'; 1106 } 1107 } 1108 1109 switch (getSymbolTableIndex(symb)) { 1110 case ELF::SHN_UNDEF: 1111 if (ret == '?') 1112 ret = 'U'; 1113 break; 1114 case ELF::SHN_ABS: ret = 'a'; break; 1115 case ELF::SHN_COMMON: ret = 'c'; break; 1116 } 1117 1118 switch (symb->getBinding()) { 1119 case ELF::STB_GLOBAL: ret = ::toupper(ret); break; 1120 case ELF::STB_WEAK: 1121 if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF) 1122 ret = 'w'; 1123 else 1124 if (symb->getType() == ELF::STT_OBJECT) 1125 ret = 'V'; 1126 else 1127 ret = 'W'; 1128 } 1129 1130 if (ret == '?' && symb->getType() == ELF::STT_SECTION) { 1131 StringRef name; 1132 if (error_code ec = getSymbolName(Symb, name)) 1133 return ec; 1134 Result = StringSwitch<char>(name) 1135 .StartsWith(".debug", 'N') 1136 .StartsWith(".note", 'n') 1137 .Default('?'); 1138 return object_error::success; 1139 } 1140 1141 Result = ret; 1142 return object_error::success; 1143} 1144 1145template<class ELFT> 1146error_code ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb, 1147 SymbolRef::Type &Result) const { 1148 validateSymbol(Symb); 1149 const Elf_Sym *symb = getSymbol(Symb); 1150 1151 switch (symb->getType()) { 1152 case ELF::STT_NOTYPE: 1153 Result = SymbolRef::ST_Unknown; 1154 break; 1155 case ELF::STT_SECTION: 1156 Result = SymbolRef::ST_Debug; 1157 break; 1158 case ELF::STT_FILE: 1159 Result = SymbolRef::ST_File; 1160 break; 1161 case ELF::STT_FUNC: 1162 Result = SymbolRef::ST_Function; 1163 break; 1164 case ELF::STT_OBJECT: 1165 case ELF::STT_COMMON: 1166 case ELF::STT_TLS: 1167 Result = SymbolRef::ST_Data; 1168 break; 1169 default: 1170 Result = SymbolRef::ST_Other; 1171 break; 1172 } 1173 return object_error::success; 1174} 1175 1176template<class ELFT> 1177error_code ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb, 1178 uint32_t &Result) const { 1179 validateSymbol(Symb); 1180 const Elf_Sym *symb = getSymbol(Symb); 1181 1182 Result = SymbolRef::SF_None; 1183 1184 if (symb->getBinding() != ELF::STB_LOCAL) 1185 Result |= SymbolRef::SF_Global; 1186 1187 if (symb->getBinding() == ELF::STB_WEAK) 1188 Result |= SymbolRef::SF_Weak; 1189 1190 if (symb->st_shndx == ELF::SHN_ABS) 1191 Result |= SymbolRef::SF_Absolute; 1192 1193 if (symb->getType() == ELF::STT_FILE || 1194 symb->getType() == ELF::STT_SECTION) 1195 Result |= SymbolRef::SF_FormatSpecific; 1196 1197 if (getSymbolTableIndex(symb) == ELF::SHN_UNDEF) 1198 Result |= SymbolRef::SF_Undefined; 1199 1200 if (symb->getType() == ELF::STT_COMMON || 1201 getSymbolTableIndex(symb) == ELF::SHN_COMMON) 1202 Result |= SymbolRef::SF_Common; 1203 1204 if (symb->getType() == ELF::STT_TLS) 1205 Result |= SymbolRef::SF_ThreadLocal; 1206 1207 return object_error::success; 1208} 1209 1210template<class ELFT> 1211error_code ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb, 1212 section_iterator &Res) const { 1213 validateSymbol(Symb); 1214 const Elf_Sym *symb = getSymbol(Symb); 1215 const Elf_Shdr *sec = getSection(symb); 1216 if (!sec) 1217 Res = end_sections(); 1218 else { 1219 DataRefImpl Sec; 1220 Sec.p = reinterpret_cast<intptr_t>(sec); 1221 Res = section_iterator(SectionRef(Sec, this)); 1222 } 1223 return object_error::success; 1224} 1225 1226template<class ELFT> 1227error_code ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb, 1228 uint64_t &Val) const { 1229 validateSymbol(Symb); 1230 const Elf_Sym *symb = getSymbol(Symb); 1231 Val = symb->st_value; 1232 return object_error::success; 1233} 1234 1235template<class ELFT> 1236error_code ELFObjectFile<ELFT>::getSectionNext(DataRefImpl Sec, 1237 SectionRef &Result) const { 1238 const uint8_t *sec = reinterpret_cast<const uint8_t *>(Sec.p); 1239 sec += Header->e_shentsize; 1240 Sec.p = reinterpret_cast<intptr_t>(sec); 1241 Result = SectionRef(Sec, this); 1242 return object_error::success; 1243} 1244 1245template<class ELFT> 1246error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec, 1247 StringRef &Result) const { 1248 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1249 Result = StringRef(getString(dot_shstrtab_sec, sec->sh_name)); 1250 return object_error::success; 1251} 1252 1253template<class ELFT> 1254error_code ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec, 1255 uint64_t &Result) const { 1256 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1257 Result = sec->sh_addr; 1258 return object_error::success; 1259} 1260 1261template<class ELFT> 1262error_code ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec, 1263 uint64_t &Result) const { 1264 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1265 Result = sec->sh_size; 1266 return object_error::success; 1267} 1268 1269template<class ELFT> 1270error_code ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec, 1271 StringRef &Result) const { 1272 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1273 const char *start = (const char*)base() + sec->sh_offset; 1274 Result = StringRef(start, sec->sh_size); 1275 return object_error::success; 1276} 1277 1278template<class ELFT> 1279error_code ELFObjectFile<ELFT>::getSectionContents(const Elf_Shdr *Sec, 1280 StringRef &Result) const { 1281 const char *start = (const char*)base() + Sec->sh_offset; 1282 Result = StringRef(start, Sec->sh_size); 1283 return object_error::success; 1284} 1285 1286template<class ELFT> 1287error_code ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec, 1288 uint64_t &Result) const { 1289 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1290 Result = sec->sh_addralign; 1291 return object_error::success; 1292} 1293 1294template<class ELFT> 1295error_code ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec, 1296 bool &Result) const { 1297 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1298 if (sec->sh_flags & ELF::SHF_EXECINSTR) 1299 Result = true; 1300 else 1301 Result = false; 1302 return object_error::success; 1303} 1304 1305template<class ELFT> 1306error_code ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec, 1307 bool &Result) const { 1308 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1309 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) 1310 && sec->sh_type == ELF::SHT_PROGBITS) 1311 Result = true; 1312 else 1313 Result = false; 1314 return object_error::success; 1315} 1316 1317template<class ELFT> 1318error_code ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec, 1319 bool &Result) const { 1320 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1321 if (sec->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) 1322 && sec->sh_type == ELF::SHT_NOBITS) 1323 Result = true; 1324 else 1325 Result = false; 1326 return object_error::success; 1327} 1328 1329template<class ELFT> 1330error_code ELFObjectFile<ELFT>::isSectionRequiredForExecution( 1331 DataRefImpl Sec, bool &Result) const { 1332 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1333 if (sec->sh_flags & ELF::SHF_ALLOC) 1334 Result = true; 1335 else 1336 Result = false; 1337 return object_error::success; 1338} 1339 1340template<class ELFT> 1341error_code ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec, 1342 bool &Result) const { 1343 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1344 if (sec->sh_type == ELF::SHT_NOBITS) 1345 Result = true; 1346 else 1347 Result = false; 1348 return object_error::success; 1349} 1350 1351template<class ELFT> 1352error_code ELFObjectFile<ELFT>::isSectionZeroInit(DataRefImpl Sec, 1353 bool &Result) const { 1354 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1355 // For ELF, all zero-init sections are virtual (that is, they occupy no space 1356 // in the object image) and vice versa. 1357 Result = sec->sh_type == ELF::SHT_NOBITS; 1358 return object_error::success; 1359} 1360 1361template<class ELFT> 1362error_code ELFObjectFile<ELFT>::isSectionReadOnlyData(DataRefImpl Sec, 1363 bool &Result) const { 1364 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1365 if (sec->sh_flags & ELF::SHF_WRITE || sec->sh_flags & ELF::SHF_EXECINSTR) 1366 Result = false; 1367 else 1368 Result = true; 1369 return object_error::success; 1370} 1371 1372template<class ELFT> 1373error_code ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec, 1374 DataRefImpl Symb, 1375 bool &Result) const { 1376 // FIXME: Unimplemented. 1377 Result = false; 1378 return object_error::success; 1379} 1380 1381template<class ELFT> 1382relocation_iterator 1383ELFObjectFile<ELFT>::getSectionRelBegin(DataRefImpl Sec) const { 1384 DataRefImpl RelData; 1385 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1386 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec); 1387 if (sec != 0 && ittr != SectionRelocMap.end()) { 1388 RelData.w.a = getSection(ittr->second[0])->sh_info; 1389 RelData.w.b = ittr->second[0]; 1390 RelData.w.c = 0; 1391 } 1392 return relocation_iterator(RelocationRef(RelData, this)); 1393} 1394 1395template<class ELFT> 1396relocation_iterator 1397ELFObjectFile<ELFT>::getSectionRelEnd(DataRefImpl Sec) const { 1398 DataRefImpl RelData; 1399 const Elf_Shdr *sec = reinterpret_cast<const Elf_Shdr *>(Sec.p); 1400 typename RelocMap_t::const_iterator ittr = SectionRelocMap.find(sec); 1401 if (sec != 0 && ittr != SectionRelocMap.end()) { 1402 // Get the index of the last relocation section for this section. 1403 std::size_t relocsecindex = ittr->second[ittr->second.size() - 1]; 1404 const Elf_Shdr *relocsec = getSection(relocsecindex); 1405 RelData.w.a = relocsec->sh_info; 1406 RelData.w.b = relocsecindex; 1407 RelData.w.c = relocsec->sh_size / relocsec->sh_entsize; 1408 } 1409 return relocation_iterator(RelocationRef(RelData, this)); 1410} 1411 1412// Relocations 1413template<class ELFT> 1414error_code ELFObjectFile<ELFT>::getRelocationNext(DataRefImpl Rel, 1415 RelocationRef &Result) const { 1416 ++Rel.w.c; 1417 const Elf_Shdr *relocsec = getSection(Rel.w.b); 1418 if (Rel.w.c >= (relocsec->sh_size / relocsec->sh_entsize)) { 1419 // We have reached the end of the relocations for this section. See if there 1420 // is another relocation section. 1421 typename RelocMap_t::mapped_type relocseclist = 1422 SectionRelocMap.lookup(getSection(Rel.w.a)); 1423 1424 // Do a binary search for the current reloc section index (which must be 1425 // present). Then get the next one. 1426 typename RelocMap_t::mapped_type::const_iterator loc = 1427 std::lower_bound(relocseclist.begin(), relocseclist.end(), Rel.w.b); 1428 ++loc; 1429 1430 // If there is no next one, don't do anything. The ++Rel.w.c above sets Rel 1431 // to the end iterator. 1432 if (loc != relocseclist.end()) { 1433 Rel.w.b = *loc; 1434 Rel.w.a = 0; 1435 } 1436 } 1437 Result = RelocationRef(Rel, this); 1438 return object_error::success; 1439} 1440 1441template<class ELFT> 1442error_code ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel, 1443 SymbolRef &Result) const { 1444 uint32_t symbolIdx; 1445 const Elf_Shdr *sec = getSection(Rel.w.b); 1446 switch (sec->sh_type) { 1447 default : 1448 report_fatal_error("Invalid section type in Rel!"); 1449 case ELF::SHT_REL : { 1450 symbolIdx = getRel(Rel)->getSymbol(); 1451 break; 1452 } 1453 case ELF::SHT_RELA : { 1454 symbolIdx = getRela(Rel)->getSymbol(); 1455 break; 1456 } 1457 } 1458 DataRefImpl SymbolData; 1459 IndexMap_t::const_iterator it = SymbolTableSectionsIndexMap.find(sec->sh_link); 1460 if (it == SymbolTableSectionsIndexMap.end()) 1461 report_fatal_error("Relocation symbol table not found!"); 1462 SymbolData.d.a = symbolIdx; 1463 SymbolData.d.b = it->second; 1464 Result = SymbolRef(SymbolData, this); 1465 return object_error::success; 1466} 1467 1468template<class ELFT> 1469error_code ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel, 1470 uint64_t &Result) const { 1471 uint64_t offset; 1472 const Elf_Shdr *sec = getSection(Rel.w.b); 1473 switch (sec->sh_type) { 1474 default : 1475 report_fatal_error("Invalid section type in Rel!"); 1476 case ELF::SHT_REL : { 1477 offset = getRel(Rel)->r_offset; 1478 break; 1479 } 1480 case ELF::SHT_RELA : { 1481 offset = getRela(Rel)->r_offset; 1482 break; 1483 } 1484 } 1485 1486 Result = offset; 1487 return object_error::success; 1488} 1489 1490template<class ELFT> 1491error_code ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel, 1492 uint64_t &Result) const { 1493 uint64_t offset; 1494 const Elf_Shdr *sec = getSection(Rel.w.b); 1495 switch (sec->sh_type) { 1496 default : 1497 report_fatal_error("Invalid section type in Rel!"); 1498 case ELF::SHT_REL : { 1499 offset = getRel(Rel)->r_offset; 1500 break; 1501 } 1502 case ELF::SHT_RELA : { 1503 offset = getRela(Rel)->r_offset; 1504 break; 1505 } 1506 } 1507 1508 Result = offset - sec->sh_addr; 1509 return object_error::success; 1510} 1511 1512template<class ELFT> 1513error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel, 1514 uint64_t &Result) const { 1515 const Elf_Shdr *sec = getSection(Rel.w.b); 1516 switch (sec->sh_type) { 1517 default : 1518 report_fatal_error("Invalid section type in Rel!"); 1519 case ELF::SHT_REL : { 1520 Result = getRel(Rel)->getType(); 1521 break; 1522 } 1523 case ELF::SHT_RELA : { 1524 Result = getRela(Rel)->getType(); 1525 break; 1526 } 1527 } 1528 return object_error::success; 1529} 1530 1531#define LLVM_ELF_SWITCH_RELOC_TYPE_NAME(enum) \ 1532 case ELF::enum: res = #enum; break; 1533 1534template<class ELFT> 1535error_code ELFObjectFile<ELFT>::getRelocationTypeName( 1536 DataRefImpl Rel, SmallVectorImpl<char> &Result) const { 1537 const Elf_Shdr *sec = getSection(Rel.w.b); 1538 uint32_t type; 1539 StringRef res; 1540 switch (sec->sh_type) { 1541 default : 1542 return object_error::parse_failed; 1543 case ELF::SHT_REL : { 1544 type = getRel(Rel)->getType(); 1545 break; 1546 } 1547 case ELF::SHT_RELA : { 1548 type = getRela(Rel)->getType(); 1549 break; 1550 } 1551 } 1552 switch (Header->e_machine) { 1553 case ELF::EM_X86_64: 1554 switch (type) { 1555 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_NONE); 1556 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_64); 1557 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC32); 1558 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOT32); 1559 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PLT32); 1560 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_COPY); 1561 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GLOB_DAT); 1562 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_JUMP_SLOT); 1563 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_RELATIVE); 1564 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPCREL); 1565 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32); 1566 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_32S); 1567 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_16); 1568 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC16); 1569 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_8); 1570 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC8); 1571 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPMOD64); 1572 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF64); 1573 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF64); 1574 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSGD); 1575 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSLD); 1576 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_DTPOFF32); 1577 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTTPOFF); 1578 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TPOFF32); 1579 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_PC64); 1580 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTOFF64); 1581 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32); 1582 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE32); 1583 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_SIZE64); 1584 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_GOTPC32_TLSDESC); 1585 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC_CALL); 1586 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_X86_64_TLSDESC); 1587 default: 1588 res = "Unknown"; 1589 } 1590 break; 1591 case ELF::EM_386: 1592 switch (type) { 1593 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_NONE); 1594 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32); 1595 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC32); 1596 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOT32); 1597 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PLT32); 1598 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_COPY); 1599 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GLOB_DAT); 1600 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_JUMP_SLOT); 1601 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_RELATIVE); 1602 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTOFF); 1603 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_GOTPC); 1604 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_32PLT); 1605 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF); 1606 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE); 1607 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTIE); 1608 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE); 1609 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD); 1610 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM); 1611 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_16); 1612 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC16); 1613 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_8); 1614 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_PC8); 1615 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_32); 1616 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_PUSH); 1617 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_CALL); 1618 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GD_POP); 1619 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_32); 1620 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_PUSH); 1621 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_CALL); 1622 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDM_POP); 1623 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LDO_32); 1624 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_IE_32); 1625 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_LE_32); 1626 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPMOD32); 1627 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DTPOFF32); 1628 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_TPOFF32); 1629 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_GOTDESC); 1630 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC_CALL); 1631 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_TLS_DESC); 1632 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_386_IRELATIVE); 1633 default: 1634 res = "Unknown"; 1635 } 1636 break; 1637 case ELF::EM_AARCH64: 1638 switch (type) { 1639 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_NONE); 1640 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_ABS64); 1641 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_ABS32); 1642 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_ABS16); 1643 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_PREL64); 1644 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_PREL32); 1645 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_PREL16); 1646 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_UABS_G0); 1647 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_UABS_G0_NC); 1648 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_UABS_G1); 1649 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_UABS_G1_NC); 1650 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_UABS_G2); 1651 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_UABS_G2_NC); 1652 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_UABS_G3); 1653 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_SABS_G0); 1654 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_SABS_G1); 1655 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_MOVW_SABS_G2); 1656 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_LD_PREL_LO19); 1657 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_ADR_PREL_LO21); 1658 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_ADR_PREL_PG_HI21); 1659 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_ADD_ABS_LO12_NC); 1660 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_LDST8_ABS_LO12_NC); 1661 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TSTBR14); 1662 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_CONDBR19); 1663 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_JUMP26); 1664 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_CALL26); 1665 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_LDST16_ABS_LO12_NC); 1666 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_LDST32_ABS_LO12_NC); 1667 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_LDST64_ABS_LO12_NC); 1668 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_LDST128_ABS_LO12_NC); 1669 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_ADR_GOT_PAGE); 1670 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_LD64_GOT_LO12_NC); 1671 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_MOVW_DTPREL_G2); 1672 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_MOVW_DTPREL_G1); 1673 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC); 1674 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_MOVW_DTPREL_G0); 1675 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC); 1676 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_ADD_DTPREL_HI12); 1677 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_ADD_DTPREL_LO12); 1678 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC); 1679 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST8_DTPREL_LO12); 1680 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC); 1681 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST16_DTPREL_LO12); 1682 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC); 1683 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST32_DTPREL_LO12); 1684 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC); 1685 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST64_DTPREL_LO12); 1686 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC); 1687 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSIE_MOVW_GOTTPREL_G1); 1688 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC); 1689 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21); 1690 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC); 1691 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSIE_LD_GOTTPREL_PREL19); 1692 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_MOVW_TPREL_G2); 1693 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_MOVW_TPREL_G1); 1694 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_MOVW_TPREL_G1_NC); 1695 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_MOVW_TPREL_G0); 1696 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_MOVW_TPREL_G0_NC); 1697 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_ADD_TPREL_HI12); 1698 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_ADD_TPREL_LO12); 1699 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_ADD_TPREL_LO12_NC); 1700 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST8_TPREL_LO12); 1701 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC); 1702 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST16_TPREL_LO12); 1703 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC); 1704 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST32_TPREL_LO12); 1705 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC); 1706 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST64_TPREL_LO12); 1707 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC); 1708 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSDESC_ADR_PAGE); 1709 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSDESC_LD64_LO12_NC); 1710 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSDESC_ADD_LO12_NC); 1711 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_AARCH64_TLSDESC_CALL); 1712 1713 default: 1714 res = "Unknown"; 1715 } 1716 break; 1717 case ELF::EM_ARM: 1718 switch (type) { 1719 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_NONE); 1720 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PC24); 1721 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS32); 1722 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_REL32); 1723 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_PC_G0); 1724 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS16); 1725 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS12); 1726 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_ABS5); 1727 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS8); 1728 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_SBREL32); 1729 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_CALL); 1730 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_PC8); 1731 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_BREL_ADJ); 1732 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DESC); 1733 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_SWI8); 1734 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_XPC25); 1735 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_XPC22); 1736 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DTPMOD32); 1737 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DTPOFF32); 1738 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_TPOFF32); 1739 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_COPY); 1740 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GLOB_DAT); 1741 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_JUMP_SLOT); 1742 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_RELATIVE); 1743 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOTOFF32); 1744 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_BASE_PREL); 1745 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_BREL); 1746 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PLT32); 1747 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_CALL); 1748 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_JUMP24); 1749 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP24); 1750 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_BASE_ABS); 1751 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PCREL_7_0); 1752 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PCREL_15_8); 1753 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PCREL_23_15); 1754 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SBREL_11_0_NC); 1755 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SBREL_19_12_NC); 1756 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SBREL_27_20_CK); 1757 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TARGET1); 1758 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_SBREL31); 1759 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_V4BX); 1760 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TARGET2); 1761 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PREL31); 1762 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_ABS_NC); 1763 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVT_ABS); 1764 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_PREL_NC); 1765 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVT_PREL); 1766 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_ABS_NC); 1767 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVT_ABS); 1768 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_PREL_NC); 1769 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVT_PREL); 1770 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP19); 1771 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP6); 1772 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_ALU_PREL_11_0); 1773 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_PC12); 1774 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ABS32_NOI); 1775 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_REL32_NOI); 1776 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G0_NC); 1777 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G0); 1778 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G1_NC); 1779 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G1); 1780 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_PC_G2); 1781 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_PC_G1); 1782 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_PC_G2); 1783 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_PC_G0); 1784 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_PC_G1); 1785 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_PC_G2); 1786 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_PC_G0); 1787 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_PC_G1); 1788 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_PC_G2); 1789 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G0_NC); 1790 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G0); 1791 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G1_NC); 1792 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G1); 1793 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ALU_SB_G2); 1794 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SB_G0); 1795 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SB_G1); 1796 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDR_SB_G2); 1797 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_SB_G0); 1798 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_SB_G1); 1799 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDRS_SB_G2); 1800 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_SB_G0); 1801 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_SB_G1); 1802 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_LDC_SB_G2); 1803 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_BREL_NC); 1804 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVT_BREL); 1805 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_MOVW_BREL); 1806 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_BREL_NC); 1807 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVT_BREL); 1808 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_MOVW_BREL); 1809 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_GOTDESC); 1810 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_CALL); 1811 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_DESCSEQ); 1812 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_TLS_CALL); 1813 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PLT32_ABS); 1814 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_ABS); 1815 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_PREL); 1816 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOT_BREL12); 1817 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOTOFF12); 1818 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GOTRELAX); 1819 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GNU_VTENTRY); 1820 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_GNU_VTINHERIT); 1821 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP11); 1822 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_JUMP8); 1823 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_GD32); 1824 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LDM32); 1825 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LDO32); 1826 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_IE32); 1827 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LE32); 1828 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LDO12); 1829 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_LE12); 1830 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_TLS_IE12GP); 1831 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_0); 1832 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_1); 1833 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_2); 1834 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_3); 1835 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_4); 1836 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_5); 1837 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_6); 1838 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_7); 1839 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_8); 1840 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_9); 1841 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_10); 1842 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_11); 1843 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_12); 1844 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_13); 1845 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_14); 1846 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_PRIVATE_15); 1847 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_ME_TOO); 1848 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_TLS_DESCSEQ16); 1849 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_ARM_THM_TLS_DESCSEQ32); 1850 default: 1851 res = "Unknown"; 1852 } 1853 break; 1854 case ELF::EM_HEXAGON: 1855 switch (type) { 1856 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_NONE); 1857 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B22_PCREL); 1858 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B15_PCREL); 1859 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B7_PCREL); 1860 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_LO16); 1861 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_HI16); 1862 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32); 1863 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_16); 1864 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_8); 1865 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_0); 1866 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_1); 1867 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_2); 1868 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GPREL16_3); 1869 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_HL16); 1870 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B13_PCREL); 1871 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B9_PCREL); 1872 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B32_PCREL_X); 1873 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32_6_X); 1874 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B22_PCREL_X); 1875 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B15_PCREL_X); 1876 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B13_PCREL_X); 1877 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B9_PCREL_X); 1878 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_B7_PCREL_X); 1879 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_16_X); 1880 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_12_X); 1881 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_11_X); 1882 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_10_X); 1883 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_9_X); 1884 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_8_X); 1885 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_7_X); 1886 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_6_X); 1887 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_32_PCREL); 1888 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_COPY); 1889 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GLOB_DAT); 1890 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_JMP_SLOT); 1891 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_RELATIVE); 1892 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_PLT_B22_PCREL); 1893 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_LO16); 1894 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_HI16); 1895 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_32); 1896 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_LO16); 1897 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_HI16); 1898 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_32); 1899 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_16); 1900 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPMOD_32); 1901 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_LO16); 1902 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_HI16); 1903 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_32); 1904 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_16); 1905 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_PLT_B22_PCREL); 1906 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_LO16); 1907 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_HI16); 1908 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_32); 1909 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_16); 1910 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_LO16); 1911 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_HI16); 1912 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_32); 1913 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_LO16); 1914 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_HI16); 1915 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_32); 1916 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_16); 1917 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_LO16); 1918 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_HI16); 1919 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_32); 1920 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_16); 1921 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_6_PCREL_X); 1922 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_32_6_X); 1923 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_16_X); 1924 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOTREL_11_X); 1925 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_32_6_X); 1926 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_16_X); 1927 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GOT_11_X); 1928 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_32_6_X); 1929 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_16_X); 1930 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_DTPREL_11_X); 1931 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_32_6_X); 1932 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_16_X); 1933 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_GD_GOT_11_X); 1934 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_32_6_X); 1935 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_16_X); 1936 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_32_6_X); 1937 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_16_X); 1938 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_IE_GOT_11_X); 1939 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_32_6_X); 1940 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_16_X); 1941 LLVM_ELF_SWITCH_RELOC_TYPE_NAME(R_HEX_TPREL_11_X); 1942 default: 1943 res = "Unknown"; 1944 } 1945 break; 1946 default: 1947 res = "Unknown"; 1948 } 1949 Result.append(res.begin(), res.end()); 1950 return object_error::success; 1951} 1952 1953#undef LLVM_ELF_SWITCH_RELOC_TYPE_NAME 1954 1955template<class ELFT> 1956error_code ELFObjectFile<ELFT>::getRelocationAdditionalInfo( 1957 DataRefImpl Rel, int64_t &Result) const { 1958 const Elf_Shdr *sec = getSection(Rel.w.b); 1959 switch (sec->sh_type) { 1960 default : 1961 report_fatal_error("Invalid section type in Rel!"); 1962 case ELF::SHT_REL : { 1963 Result = 0; 1964 return object_error::success; 1965 } 1966 case ELF::SHT_RELA : { 1967 Result = getRela(Rel)->r_addend; 1968 return object_error::success; 1969 } 1970 } 1971} 1972 1973template<class ELFT> 1974error_code ELFObjectFile<ELFT>::getRelocationValueString( 1975 DataRefImpl Rel, SmallVectorImpl<char> &Result) const { 1976 const Elf_Shdr *sec = getSection(Rel.w.b); 1977 uint8_t type; 1978 StringRef res; 1979 int64_t addend = 0; 1980 uint16_t symbol_index = 0; 1981 switch (sec->sh_type) { 1982 default: 1983 return object_error::parse_failed; 1984 case ELF::SHT_REL: { 1985 type = getRel(Rel)->getType(); 1986 symbol_index = getRel(Rel)->getSymbol(); 1987 // TODO: Read implicit addend from section data. 1988 break; 1989 } 1990 case ELF::SHT_RELA: { 1991 type = getRela(Rel)->getType(); 1992 symbol_index = getRela(Rel)->getSymbol(); 1993 addend = getRela(Rel)->r_addend; 1994 break; 1995 } 1996 } 1997 const Elf_Sym *symb = getEntry<Elf_Sym>(sec->sh_link, symbol_index); 1998 StringRef symname; 1999 if (error_code ec = getSymbolName(getSection(sec->sh_link), symb, symname)) 2000 return ec; 2001 switch (Header->e_machine) { 2002 case ELF::EM_X86_64: 2003 switch (type) { 2004 case ELF::R_X86_64_PC8: 2005 case ELF::R_X86_64_PC16: 2006 case ELF::R_X86_64_PC32: { 2007 std::string fmtbuf; 2008 raw_string_ostream fmt(fmtbuf); 2009 fmt << symname << (addend < 0 ? "" : "+") << addend << "-P"; 2010 fmt.flush(); 2011 Result.append(fmtbuf.begin(), fmtbuf.end()); 2012 } 2013 break; 2014 case ELF::R_X86_64_8: 2015 case ELF::R_X86_64_16: 2016 case ELF::R_X86_64_32: 2017 case ELF::R_X86_64_32S: 2018 case ELF::R_X86_64_64: { 2019 std::string fmtbuf; 2020 raw_string_ostream fmt(fmtbuf); 2021 fmt << symname << (addend < 0 ? "" : "+") << addend; 2022 fmt.flush(); 2023 Result.append(fmtbuf.begin(), fmtbuf.end()); 2024 } 2025 break; 2026 default: 2027 res = "Unknown"; 2028 } 2029 break; 2030 case ELF::EM_AARCH64: 2031 case ELF::EM_ARM: 2032 case ELF::EM_HEXAGON: 2033 res = symname; 2034 break; 2035 default: 2036 res = "Unknown"; 2037 } 2038 if (Result.empty()) 2039 Result.append(res.begin(), res.end()); 2040 return object_error::success; 2041} 2042 2043// Verify that the last byte in the string table in a null. 2044template<class ELFT> 2045void ELFObjectFile<ELFT>::VerifyStrTab(const Elf_Shdr *sh) const { 2046 const char *strtab = (const char*)base() + sh->sh_offset; 2047 if (strtab[sh->sh_size - 1] != 0) 2048 // FIXME: Proper error handling. 2049 report_fatal_error("String table must end with a null terminator!"); 2050} 2051 2052template<class ELFT> 2053ELFObjectFile<ELFT>::ELFObjectFile(MemoryBuffer *Object, error_code &ec) 2054 : ObjectFile(getELFType( 2055 static_cast<endianness>(ELFT::TargetEndianness) == support::little, 2056 ELFT::Is64Bits), 2057 Object, 2058 ec) 2059 , isDyldELFObject(false) 2060 , SectionHeaderTable(0) 2061 , dot_shstrtab_sec(0) 2062 , dot_strtab_sec(0) 2063 , dot_dynstr_sec(0) 2064 , dot_dynamic_sec(0) 2065 , dot_gnu_version_sec(0) 2066 , dot_gnu_version_r_sec(0) 2067 , dot_gnu_version_d_sec(0) 2068 , dt_soname(0) 2069 { 2070 2071 const uint64_t FileSize = Data->getBufferSize(); 2072 2073 if (sizeof(Elf_Ehdr) > FileSize) 2074 // FIXME: Proper error handling. 2075 report_fatal_error("File too short!"); 2076 2077 Header = reinterpret_cast<const Elf_Ehdr *>(base()); 2078 2079 if (Header->e_shoff == 0) 2080 return; 2081 2082 const uint64_t SectionTableOffset = Header->e_shoff; 2083 2084 if (SectionTableOffset + sizeof(Elf_Shdr) > FileSize) 2085 // FIXME: Proper error handling. 2086 report_fatal_error("Section header table goes past end of file!"); 2087 2088 // The getNumSections() call below depends on SectionHeaderTable being set. 2089 SectionHeaderTable = 2090 reinterpret_cast<const Elf_Shdr *>(base() + SectionTableOffset); 2091 const uint64_t SectionTableSize = getNumSections() * Header->e_shentsize; 2092 2093 if (SectionTableOffset + SectionTableSize > FileSize) 2094 // FIXME: Proper error handling. 2095 report_fatal_error("Section table goes past end of file!"); 2096 2097 // To find the symbol tables we walk the section table to find SHT_SYMTAB. 2098 const Elf_Shdr* SymbolTableSectionHeaderIndex = 0; 2099 const Elf_Shdr* sh = SectionHeaderTable; 2100 2101 // Reserve SymbolTableSections[0] for .dynsym 2102 SymbolTableSections.push_back(NULL); 2103 2104 for (uint64_t i = 0, e = getNumSections(); i != e; ++i) { 2105 switch (sh->sh_type) { 2106 case ELF::SHT_SYMTAB_SHNDX: { 2107 if (SymbolTableSectionHeaderIndex) 2108 // FIXME: Proper error handling. 2109 report_fatal_error("More than one .symtab_shndx!"); 2110 SymbolTableSectionHeaderIndex = sh; 2111 break; 2112 } 2113 case ELF::SHT_SYMTAB: { 2114 SymbolTableSectionsIndexMap[i] = SymbolTableSections.size(); 2115 SymbolTableSections.push_back(sh); 2116 break; 2117 } 2118 case ELF::SHT_DYNSYM: { 2119 if (SymbolTableSections[0] != NULL) 2120 // FIXME: Proper error handling. 2121 report_fatal_error("More than one .dynsym!"); 2122 SymbolTableSectionsIndexMap[i] = 0; 2123 SymbolTableSections[0] = sh; 2124 break; 2125 } 2126 case ELF::SHT_REL: 2127 case ELF::SHT_RELA: { 2128 SectionRelocMap[getSection(sh->sh_info)].push_back(i); 2129 break; 2130 } 2131 case ELF::SHT_DYNAMIC: { 2132 if (dot_dynamic_sec != NULL) 2133 // FIXME: Proper error handling. 2134 report_fatal_error("More than one .dynamic!"); 2135 dot_dynamic_sec = sh; 2136 break; 2137 } 2138 case ELF::SHT_GNU_versym: { 2139 if (dot_gnu_version_sec != NULL) 2140 // FIXME: Proper error handling. 2141 report_fatal_error("More than one .gnu.version section!"); 2142 dot_gnu_version_sec = sh; 2143 break; 2144 } 2145 case ELF::SHT_GNU_verdef: { 2146 if (dot_gnu_version_d_sec != NULL) 2147 // FIXME: Proper error handling. 2148 report_fatal_error("More than one .gnu.version_d section!"); 2149 dot_gnu_version_d_sec = sh; 2150 break; 2151 } 2152 case ELF::SHT_GNU_verneed: { 2153 if (dot_gnu_version_r_sec != NULL) 2154 // FIXME: Proper error handling. 2155 report_fatal_error("More than one .gnu.version_r section!"); 2156 dot_gnu_version_r_sec = sh; 2157 break; 2158 } 2159 } 2160 ++sh; 2161 } 2162 2163 // Sort section relocation lists by index. 2164 for (typename RelocMap_t::iterator i = SectionRelocMap.begin(), 2165 e = SectionRelocMap.end(); i != e; ++i) { 2166 std::sort(i->second.begin(), i->second.end()); 2167 } 2168 2169 // Get string table sections. 2170 dot_shstrtab_sec = getSection(getStringTableIndex()); 2171 if (dot_shstrtab_sec) { 2172 // Verify that the last byte in the string table in a null. 2173 VerifyStrTab(dot_shstrtab_sec); 2174 } 2175 2176 // Merge this into the above loop. 2177 for (const char *i = reinterpret_cast<const char *>(SectionHeaderTable), 2178 *e = i + getNumSections() * Header->e_shentsize; 2179 i != e; i += Header->e_shentsize) { 2180 const Elf_Shdr *sh = reinterpret_cast<const Elf_Shdr*>(i); 2181 if (sh->sh_type == ELF::SHT_STRTAB) { 2182 StringRef SectionName(getString(dot_shstrtab_sec, sh->sh_name)); 2183 if (SectionName == ".strtab") { 2184 if (dot_strtab_sec != 0) 2185 // FIXME: Proper error handling. 2186 report_fatal_error("Already found section named .strtab!"); 2187 dot_strtab_sec = sh; 2188 VerifyStrTab(dot_strtab_sec); 2189 } else if (SectionName == ".dynstr") { 2190 if (dot_dynstr_sec != 0) 2191 // FIXME: Proper error handling. 2192 report_fatal_error("Already found section named .dynstr!"); 2193 dot_dynstr_sec = sh; 2194 VerifyStrTab(dot_dynstr_sec); 2195 } 2196 } 2197 } 2198 2199 // Build symbol name side-mapping if there is one. 2200 if (SymbolTableSectionHeaderIndex) { 2201 const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() + 2202 SymbolTableSectionHeaderIndex->sh_offset); 2203 error_code ec; 2204 for (symbol_iterator si = begin_symbols(), 2205 se = end_symbols(); si != se; si.increment(ec)) { 2206 if (ec) 2207 report_fatal_error("Fewer extended symbol table entries than symbols!"); 2208 if (*ShndxTable != ELF::SHN_UNDEF) 2209 ExtendedSymbolTable[getSymbol(si->getRawDataRefImpl())] = *ShndxTable; 2210 ++ShndxTable; 2211 } 2212 } 2213} 2214 2215// Get the symbol table index in the symtab section given a symbol 2216template<class ELFT> 2217uint64_t ELFObjectFile<ELFT>::getSymbolIndex(const Elf_Sym *Sym) const { 2218 assert(SymbolTableSections.size() == 1 && "Only one symbol table supported!"); 2219 const Elf_Shdr *SymTab = *SymbolTableSections.begin(); 2220 uintptr_t SymLoc = uintptr_t(Sym); 2221 uintptr_t SymTabLoc = uintptr_t(base() + SymTab->sh_offset); 2222 assert(SymLoc > SymTabLoc && "Symbol not in symbol table!"); 2223 uint64_t SymOffset = SymLoc - SymTabLoc; 2224 assert(SymOffset % SymTab->sh_entsize == 0 && 2225 "Symbol not multiple of symbol size!"); 2226 return SymOffset / SymTab->sh_entsize; 2227} 2228 2229template<class ELFT> 2230symbol_iterator ELFObjectFile<ELFT>::begin_symbols() const { 2231 DataRefImpl SymbolData; 2232 if (SymbolTableSections.size() <= 1) { 2233 SymbolData.d.a = std::numeric_limits<uint32_t>::max(); 2234 SymbolData.d.b = std::numeric_limits<uint32_t>::max(); 2235 } else { 2236 SymbolData.d.a = 1; // The 0th symbol in ELF is fake. 2237 SymbolData.d.b = 1; // The 0th table is .dynsym 2238 } 2239 return symbol_iterator(SymbolRef(SymbolData, this)); 2240} 2241 2242template<class ELFT> 2243symbol_iterator ELFObjectFile<ELFT>::end_symbols() const { 2244 DataRefImpl SymbolData; 2245 SymbolData.d.a = std::numeric_limits<uint32_t>::max(); 2246 SymbolData.d.b = std::numeric_limits<uint32_t>::max(); 2247 return symbol_iterator(SymbolRef(SymbolData, this)); 2248} 2249 2250template<class ELFT> 2251symbol_iterator ELFObjectFile<ELFT>::begin_dynamic_symbols() const { 2252 DataRefImpl SymbolData; 2253 if (SymbolTableSections[0] == NULL) { 2254 SymbolData.d.a = std::numeric_limits<uint32_t>::max(); 2255 SymbolData.d.b = std::numeric_limits<uint32_t>::max(); 2256 } else { 2257 SymbolData.d.a = 1; // The 0th symbol in ELF is fake. 2258 SymbolData.d.b = 0; // The 0th table is .dynsym 2259 } 2260 return symbol_iterator(SymbolRef(SymbolData, this)); 2261} 2262 2263template<class ELFT> 2264symbol_iterator ELFObjectFile<ELFT>::end_dynamic_symbols() const { 2265 DataRefImpl SymbolData; 2266 SymbolData.d.a = std::numeric_limits<uint32_t>::max(); 2267 SymbolData.d.b = std::numeric_limits<uint32_t>::max(); 2268 return symbol_iterator(SymbolRef(SymbolData, this)); 2269} 2270 2271template<class ELFT> 2272section_iterator ELFObjectFile<ELFT>::begin_sections() const { 2273 DataRefImpl ret; 2274 ret.p = reinterpret_cast<intptr_t>(base() + Header->e_shoff); 2275 return section_iterator(SectionRef(ret, this)); 2276} 2277 2278template<class ELFT> 2279section_iterator ELFObjectFile<ELFT>::end_sections() const { 2280 DataRefImpl ret; 2281 ret.p = reinterpret_cast<intptr_t>(base() 2282 + Header->e_shoff 2283 + (Header->e_shentsize*getNumSections())); 2284 return section_iterator(SectionRef(ret, this)); 2285} 2286 2287template<class ELFT> 2288typename ELFObjectFile<ELFT>::Elf_Dyn_iterator 2289ELFObjectFile<ELFT>::begin_dynamic_table() const { 2290 if (dot_dynamic_sec) 2291 return Elf_Dyn_iterator(dot_dynamic_sec->sh_entsize, 2292 (const char *)base() + dot_dynamic_sec->sh_offset); 2293 return Elf_Dyn_iterator(0, 0); 2294} 2295 2296template<class ELFT> 2297typename ELFObjectFile<ELFT>::Elf_Dyn_iterator 2298ELFObjectFile<ELFT>::end_dynamic_table(bool NULLEnd) const { 2299 if (dot_dynamic_sec) { 2300 Elf_Dyn_iterator Ret(dot_dynamic_sec->sh_entsize, 2301 (const char *)base() + dot_dynamic_sec->sh_offset + 2302 dot_dynamic_sec->sh_size); 2303 2304 if (NULLEnd) { 2305 Elf_Dyn_iterator Start = begin_dynamic_table(); 2306 for (; Start != Ret && Start->getTag() != ELF::DT_NULL; ++Start) 2307 ; 2308 // Include the DT_NULL. 2309 if (Start != Ret) 2310 ++Start; 2311 Ret = Start; 2312 } 2313 return Ret; 2314 } 2315 return Elf_Dyn_iterator(0, 0); 2316} 2317 2318template<class ELFT> 2319StringRef ELFObjectFile<ELFT>::getLoadName() const { 2320 if (!dt_soname) { 2321 // Find the DT_SONAME entry 2322 Elf_Dyn_iterator it = begin_dynamic_table(); 2323 Elf_Dyn_iterator ie = end_dynamic_table(); 2324 for (; it != ie; ++it) { 2325 if (it->getTag() == ELF::DT_SONAME) 2326 break; 2327 } 2328 if (it != ie) { 2329 if (dot_dynstr_sec == NULL) 2330 report_fatal_error("Dynamic string table is missing"); 2331 dt_soname = getString(dot_dynstr_sec, it->getVal()); 2332 } else { 2333 dt_soname = ""; 2334 } 2335 } 2336 return dt_soname; 2337} 2338 2339template<class ELFT> 2340library_iterator ELFObjectFile<ELFT>::begin_libraries_needed() const { 2341 // Find the first DT_NEEDED entry 2342 Elf_Dyn_iterator i = begin_dynamic_table(); 2343 Elf_Dyn_iterator e = end_dynamic_table(); 2344 for (; i != e; ++i) { 2345 if (i->getTag() == ELF::DT_NEEDED) 2346 break; 2347 } 2348 2349 DataRefImpl DRI; 2350 DRI.p = reinterpret_cast<uintptr_t>(i.get()); 2351 return library_iterator(LibraryRef(DRI, this)); 2352} 2353 2354template<class ELFT> 2355error_code ELFObjectFile<ELFT>::getLibraryNext(DataRefImpl Data, 2356 LibraryRef &Result) const { 2357 // Use the same DataRefImpl format as DynRef. 2358 Elf_Dyn_iterator i = Elf_Dyn_iterator(dot_dynamic_sec->sh_entsize, 2359 reinterpret_cast<const char *>(Data.p)); 2360 Elf_Dyn_iterator e = end_dynamic_table(); 2361 2362 // Skip the current dynamic table entry. 2363 ++i; 2364 2365 // Find the next DT_NEEDED entry. 2366 for (; i != e && i->getTag() != ELF::DT_NEEDED; ++i); 2367 2368 DataRefImpl DRI; 2369 DRI.p = reinterpret_cast<uintptr_t>(i.get()); 2370 Result = LibraryRef(DRI, this); 2371 return object_error::success; 2372} 2373 2374template<class ELFT> 2375error_code ELFObjectFile<ELFT>::getLibraryPath(DataRefImpl Data, 2376 StringRef &Res) const { 2377 Elf_Dyn_iterator i = Elf_Dyn_iterator(dot_dynamic_sec->sh_entsize, 2378 reinterpret_cast<const char *>(Data.p)); 2379 if (i == end_dynamic_table()) 2380 report_fatal_error("getLibraryPath() called on iterator end"); 2381 2382 if (i->getTag() != ELF::DT_NEEDED) 2383 report_fatal_error("Invalid library_iterator"); 2384 2385 // This uses .dynstr to lookup the name of the DT_NEEDED entry. 2386 // THis works as long as DT_STRTAB == .dynstr. This is true most of 2387 // the time, but the specification allows exceptions. 2388 // TODO: This should really use DT_STRTAB instead. Doing this requires 2389 // reading the program headers. 2390 if (dot_dynstr_sec == NULL) 2391 report_fatal_error("Dynamic string table is missing"); 2392 Res = getString(dot_dynstr_sec, i->getVal()); 2393 return object_error::success; 2394} 2395 2396template<class ELFT> 2397library_iterator ELFObjectFile<ELFT>::end_libraries_needed() const { 2398 Elf_Dyn_iterator e = end_dynamic_table(); 2399 DataRefImpl DRI; 2400 DRI.p = reinterpret_cast<uintptr_t>(e.get()); 2401 return library_iterator(LibraryRef(DRI, this)); 2402} 2403 2404template<class ELFT> 2405uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const { 2406 return ELFT::Is64Bits ? 8 : 4; 2407} 2408 2409template<class ELFT> 2410StringRef ELFObjectFile<ELFT>::getFileFormatName() const { 2411 switch(Header->e_ident[ELF::EI_CLASS]) { 2412 case ELF::ELFCLASS32: 2413 switch(Header->e_machine) { 2414 case ELF::EM_386: 2415 return "ELF32-i386"; 2416 case ELF::EM_X86_64: 2417 return "ELF32-x86-64"; 2418 case ELF::EM_ARM: 2419 return "ELF32-arm"; 2420 case ELF::EM_HEXAGON: 2421 return "ELF32-hexagon"; 2422 case ELF::EM_MIPS: 2423 return "ELF32-mips"; 2424 default: 2425 return "ELF32-unknown"; 2426 } 2427 case ELF::ELFCLASS64: 2428 switch(Header->e_machine) { 2429 case ELF::EM_386: 2430 return "ELF64-i386"; 2431 case ELF::EM_X86_64: 2432 return "ELF64-x86-64"; 2433 case ELF::EM_AARCH64: 2434 return "ELF64-aarch64"; 2435 case ELF::EM_PPC64: 2436 return "ELF64-ppc64"; 2437 default: 2438 return "ELF64-unknown"; 2439 } 2440 default: 2441 // FIXME: Proper error handling. 2442 report_fatal_error("Invalid ELFCLASS!"); 2443 } 2444} 2445 2446template<class ELFT> 2447unsigned ELFObjectFile<ELFT>::getArch() const { 2448 switch(Header->e_machine) { 2449 case ELF::EM_386: 2450 return Triple::x86; 2451 case ELF::EM_X86_64: 2452 return Triple::x86_64; 2453 case ELF::EM_AARCH64: 2454 return Triple::aarch64; 2455 case ELF::EM_ARM: 2456 return Triple::arm; 2457 case ELF::EM_HEXAGON: 2458 return Triple::hexagon; 2459 case ELF::EM_MIPS: 2460 return (ELFT::TargetEndianness == support::little) ? 2461 Triple::mipsel : Triple::mips; 2462 case ELF::EM_PPC64: 2463 return Triple::ppc64; 2464 default: 2465 return Triple::UnknownArch; 2466 } 2467} 2468 2469template<class ELFT> 2470uint64_t ELFObjectFile<ELFT>::getNumSections() const { 2471 assert(Header && "Header not initialized!"); 2472 if (Header->e_shnum == ELF::SHN_UNDEF) { 2473 assert(SectionHeaderTable && "SectionHeaderTable not initialized!"); 2474 return SectionHeaderTable->sh_size; 2475 } 2476 return Header->e_shnum; 2477} 2478 2479template<class ELFT> 2480uint64_t 2481ELFObjectFile<ELFT>::getStringTableIndex() const { 2482 if (Header->e_shnum == ELF::SHN_UNDEF) { 2483 if (Header->e_shstrndx == ELF::SHN_HIRESERVE) 2484 return SectionHeaderTable->sh_link; 2485 if (Header->e_shstrndx >= getNumSections()) 2486 return 0; 2487 } 2488 return Header->e_shstrndx; 2489} 2490 2491template<class ELFT> 2492template<typename T> 2493inline const T * 2494ELFObjectFile<ELFT>::getEntry(uint16_t Section, uint32_t Entry) const { 2495 return getEntry<T>(getSection(Section), Entry); 2496} 2497 2498template<class ELFT> 2499template<typename T> 2500inline const T * 2501ELFObjectFile<ELFT>::getEntry(const Elf_Shdr * Section, uint32_t Entry) const { 2502 return reinterpret_cast<const T *>( 2503 base() 2504 + Section->sh_offset 2505 + (Entry * Section->sh_entsize)); 2506} 2507 2508template<class ELFT> 2509const typename ELFObjectFile<ELFT>::Elf_Sym * 2510ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const { 2511 return getEntry<Elf_Sym>(SymbolTableSections[Symb.d.b], Symb.d.a); 2512} 2513 2514template<class ELFT> 2515const typename ELFObjectFile<ELFT>::Elf_Rel * 2516ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const { 2517 return getEntry<Elf_Rel>(Rel.w.b, Rel.w.c); 2518} 2519 2520template<class ELFT> 2521const typename ELFObjectFile<ELFT>::Elf_Rela * 2522ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const { 2523 return getEntry<Elf_Rela>(Rela.w.b, Rela.w.c); 2524} 2525 2526template<class ELFT> 2527const typename ELFObjectFile<ELFT>::Elf_Shdr * 2528ELFObjectFile<ELFT>::getSection(DataRefImpl Symb) const { 2529 const Elf_Shdr *sec = getSection(Symb.d.b); 2530 if (sec->sh_type != ELF::SHT_SYMTAB || sec->sh_type != ELF::SHT_DYNSYM) 2531 // FIXME: Proper error handling. 2532 report_fatal_error("Invalid symbol table section!"); 2533 return sec; 2534} 2535 2536template<class ELFT> 2537const typename ELFObjectFile<ELFT>::Elf_Shdr * 2538ELFObjectFile<ELFT>::getSection(uint32_t index) const { 2539 if (index == 0) 2540 return 0; 2541 if (!SectionHeaderTable || index >= getNumSections()) 2542 // FIXME: Proper error handling. 2543 report_fatal_error("Invalid section index!"); 2544 2545 return reinterpret_cast<const Elf_Shdr *>( 2546 reinterpret_cast<const char *>(SectionHeaderTable) 2547 + (index * Header->e_shentsize)); 2548} 2549 2550template<class ELFT> 2551const char *ELFObjectFile<ELFT>::getString(uint32_t section, 2552 ELF::Elf32_Word offset) const { 2553 return getString(getSection(section), offset); 2554} 2555 2556template<class ELFT> 2557const char *ELFObjectFile<ELFT>::getString(const Elf_Shdr *section, 2558 ELF::Elf32_Word offset) const { 2559 assert(section && section->sh_type == ELF::SHT_STRTAB && "Invalid section!"); 2560 if (offset >= section->sh_size) 2561 // FIXME: Proper error handling. 2562 report_fatal_error("Symbol name offset outside of string table!"); 2563 return (const char *)base() + section->sh_offset + offset; 2564} 2565 2566template<class ELFT> 2567error_code ELFObjectFile<ELFT>::getSymbolName(const Elf_Shdr *section, 2568 const Elf_Sym *symb, 2569 StringRef &Result) const { 2570 if (symb->st_name == 0) { 2571 const Elf_Shdr *section = getSection(symb); 2572 if (!section) 2573 Result = ""; 2574 else 2575 Result = getString(dot_shstrtab_sec, section->sh_name); 2576 return object_error::success; 2577 } 2578 2579 if (section == SymbolTableSections[0]) { 2580 // Symbol is in .dynsym, use .dynstr string table 2581 Result = getString(dot_dynstr_sec, symb->st_name); 2582 } else { 2583 // Use the default symbol table name section. 2584 Result = getString(dot_strtab_sec, symb->st_name); 2585 } 2586 return object_error::success; 2587} 2588 2589template<class ELFT> 2590error_code ELFObjectFile<ELFT>::getSectionName(const Elf_Shdr *section, 2591 StringRef &Result) const { 2592 Result = StringRef(getString(dot_shstrtab_sec, section->sh_name)); 2593 return object_error::success; 2594} 2595 2596template<class ELFT> 2597error_code ELFObjectFile<ELFT>::getSymbolVersion(const Elf_Shdr *section, 2598 const Elf_Sym *symb, 2599 StringRef &Version, 2600 bool &IsDefault) const { 2601 // Handle non-dynamic symbols. 2602 if (section != SymbolTableSections[0]) { 2603 // Non-dynamic symbols can have versions in their names 2604 // A name of the form 'foo@V1' indicates version 'V1', non-default. 2605 // A name of the form 'foo@@V2' indicates version 'V2', default version. 2606 StringRef Name; 2607 error_code ec = getSymbolName(section, symb, Name); 2608 if (ec != object_error::success) 2609 return ec; 2610 size_t atpos = Name.find('@'); 2611 if (atpos == StringRef::npos) { 2612 Version = ""; 2613 IsDefault = false; 2614 return object_error::success; 2615 } 2616 ++atpos; 2617 if (atpos < Name.size() && Name[atpos] == '@') { 2618 IsDefault = true; 2619 ++atpos; 2620 } else { 2621 IsDefault = false; 2622 } 2623 Version = Name.substr(atpos); 2624 return object_error::success; 2625 } 2626 2627 // This is a dynamic symbol. Look in the GNU symbol version table. 2628 if (dot_gnu_version_sec == NULL) { 2629 // No version table. 2630 Version = ""; 2631 IsDefault = false; 2632 return object_error::success; 2633 } 2634 2635 // Determine the position in the symbol table of this entry. 2636 const char *sec_start = (const char*)base() + section->sh_offset; 2637 size_t entry_index = ((const char*)symb - sec_start)/section->sh_entsize; 2638 2639 // Get the corresponding version index entry 2640 const Elf_Versym *vs = getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index); 2641 size_t version_index = vs->vs_index & ELF::VERSYM_VERSION; 2642 2643 // Special markers for unversioned symbols. 2644 if (version_index == ELF::VER_NDX_LOCAL || 2645 version_index == ELF::VER_NDX_GLOBAL) { 2646 Version = ""; 2647 IsDefault = false; 2648 return object_error::success; 2649 } 2650 2651 // Lookup this symbol in the version table 2652 LoadVersionMap(); 2653 if (version_index >= VersionMap.size() || VersionMap[version_index].isNull()) 2654 report_fatal_error("Symbol has version index without corresponding " 2655 "define or reference entry"); 2656 const VersionMapEntry &entry = VersionMap[version_index]; 2657 2658 // Get the version name string 2659 size_t name_offset; 2660 if (entry.isVerdef()) { 2661 // The first Verdaux entry holds the name. 2662 name_offset = entry.getVerdef()->getAux()->vda_name; 2663 } else { 2664 name_offset = entry.getVernaux()->vna_name; 2665 } 2666 Version = getString(dot_dynstr_sec, name_offset); 2667 2668 // Set IsDefault 2669 if (entry.isVerdef()) { 2670 IsDefault = !(vs->vs_index & ELF::VERSYM_HIDDEN); 2671 } else { 2672 IsDefault = false; 2673 } 2674 2675 return object_error::success; 2676} 2677 2678/// This is a generic interface for retrieving GNU symbol version 2679/// information from an ELFObjectFile. 2680static inline error_code GetELFSymbolVersion(const ObjectFile *Obj, 2681 const SymbolRef &Sym, 2682 StringRef &Version, 2683 bool &IsDefault) { 2684 // Little-endian 32-bit 2685 if (const ELFObjectFile<ELFType<support::little, 4, false> > *ELFObj = 2686 dyn_cast<ELFObjectFile<ELFType<support::little, 4, false> > >(Obj)) 2687 return ELFObj->getSymbolVersion(Sym, Version, IsDefault); 2688 2689 // Big-endian 32-bit 2690 if (const ELFObjectFile<ELFType<support::big, 4, false> > *ELFObj = 2691 dyn_cast<ELFObjectFile<ELFType<support::big, 4, false> > >(Obj)) 2692 return ELFObj->getSymbolVersion(Sym, Version, IsDefault); 2693 2694 // Little-endian 64-bit 2695 if (const ELFObjectFile<ELFType<support::little, 8, true> > *ELFObj = 2696 dyn_cast<ELFObjectFile<ELFType<support::little, 8, true> > >(Obj)) 2697 return ELFObj->getSymbolVersion(Sym, Version, IsDefault); 2698 2699 // Big-endian 64-bit 2700 if (const ELFObjectFile<ELFType<support::big, 8, true> > *ELFObj = 2701 dyn_cast<ELFObjectFile<ELFType<support::big, 8, true> > >(Obj)) 2702 return ELFObj->getSymbolVersion(Sym, Version, IsDefault); 2703 2704 llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF"); 2705} 2706 2707/// This function returns the hash value for a symbol in the .dynsym section 2708/// Name of the API remains consistent as specified in the libelf 2709/// REF : http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#hash 2710static inline unsigned elf_hash(StringRef &symbolName) { 2711 unsigned h = 0, g; 2712 for (unsigned i = 0, j = symbolName.size(); i < j; i++) { 2713 h = (h << 4) + symbolName[i]; 2714 g = h & 0xf0000000L; 2715 if (g != 0) 2716 h ^= g >> 24; 2717 h &= ~g; 2718 } 2719 return h; 2720} 2721 2722} 2723} 2724 2725#endif 2726