1 //===- ELFTypes.h - Endian specific types for ELF ---------------*- 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 #ifndef LLVM_OBJECT_ELFTYPES_H 11 #define LLVM_OBJECT_ELFTYPES_H 12 13 #include "llvm/ADT/ArrayRef.h" 14 #include "llvm/ADT/StringRef.h" 15 #include "llvm/BinaryFormat/ELF.h" 16 #include "llvm/Object/Error.h" 17 #include "llvm/Support/Endian.h" 18 #include "llvm/Support/Error.h" 19 #include <cassert> 20 #include <cstdint> 21 #include <cstring> 22 #include <type_traits> 23 24 namespace llvm { 25 namespace object { 26 27 using support::endianness; 28 29 template <class ELFT> struct Elf_Ehdr_Impl; 30 template <class ELFT> struct Elf_Shdr_Impl; 31 template <class ELFT> struct Elf_Sym_Impl; 32 template <class ELFT> struct Elf_Dyn_Impl; 33 template <class ELFT> struct Elf_Phdr_Impl; 34 template <class ELFT, bool isRela> struct Elf_Rel_Impl; 35 template <class ELFT> struct Elf_Verdef_Impl; 36 template <class ELFT> struct Elf_Verdaux_Impl; 37 template <class ELFT> struct Elf_Verneed_Impl; 38 template <class ELFT> struct Elf_Vernaux_Impl; 39 template <class ELFT> struct Elf_Versym_Impl; 40 template <class ELFT> struct Elf_Hash_Impl; 41 template <class ELFT> struct Elf_GnuHash_Impl; 42 template <class ELFT> struct Elf_Chdr_Impl; 43 44 template <endianness E, bool Is64> struct ELFType { 45 private: 46 template <typename Ty> 47 using packed = support::detail::packed_endian_specific_integral<Ty, E, 2>; 48 49 public: 50 static const endianness TargetEndianness = E; 51 static const bool Is64Bits = Is64; 52 53 using uint = typename std::conditional<Is64, uint64_t, uint32_t>::type; 54 using Ehdr = Elf_Ehdr_Impl<ELFType<E, Is64>>; 55 using Shdr = Elf_Shdr_Impl<ELFType<E, Is64>>; 56 using Sym = Elf_Sym_Impl<ELFType<E, Is64>>; 57 using Dyn = Elf_Dyn_Impl<ELFType<E, Is64>>; 58 using Phdr = Elf_Phdr_Impl<ELFType<E, Is64>>; 59 using Rel = Elf_Rel_Impl<ELFType<E, Is64>, false>; 60 using Rela = Elf_Rel_Impl<ELFType<E, Is64>, true>; 61 using Verdef = Elf_Verdef_Impl<ELFType<E, Is64>>; 62 using Verdaux = Elf_Verdaux_Impl<ELFType<E, Is64>>; 63 using Verneed = Elf_Verneed_Impl<ELFType<E, Is64>>; 64 using Vernaux = Elf_Vernaux_Impl<ELFType<E, Is64>>; 65 using Versym = Elf_Versym_Impl<ELFType<E, Is64>>; 66 using Hash = Elf_Hash_Impl<ELFType<E, Is64>>; 67 using GnuHash = Elf_GnuHash_Impl<ELFType<E, Is64>>; 68 using Chdr = Elf_Chdr_Impl<ELFType<E, Is64>>; 69 using DynRange = ArrayRef<Dyn>; 70 using ShdrRange = ArrayRef<Shdr>; 71 using SymRange = ArrayRef<Sym>; 72 using RelRange = ArrayRef<Rel>; 73 using RelaRange = ArrayRef<Rela>; 74 using PhdrRange = ArrayRef<Phdr>; 75 76 using Half = packed<uint16_t>; 77 using Word = packed<uint32_t>; 78 using Sword = packed<int32_t>; 79 using Xword = packed<uint64_t>; 80 using Sxword = packed<int64_t>; 81 using Addr = packed<uint>; 82 using Off = packed<uint>; 83 }; 84 85 using ELF32LE = ELFType<support::little, false>; 86 using ELF32BE = ELFType<support::big, false>; 87 using ELF64LE = ELFType<support::little, true>; 88 using ELF64BE = ELFType<support::big, true>; 89 90 // Use an alignment of 2 for the typedefs since that is the worst case for 91 // ELF files in archives. 92 93 // Templates to choose Elf_Addr and Elf_Off depending on is64Bits. 94 template <endianness target_endianness> struct ELFDataTypeTypedefHelperCommon { 95 using Elf_Half = support::detail::packed_endian_specific_integral< 96 uint16_t, target_endianness, 2>; 97 using Elf_Word = support::detail::packed_endian_specific_integral< 98 uint32_t, target_endianness, 2>; 99 using Elf_Sword = support::detail::packed_endian_specific_integral< 100 int32_t, target_endianness, 2>; 101 using Elf_Xword = support::detail::packed_endian_specific_integral< 102 uint64_t, target_endianness, 2>; 103 using Elf_Sxword = support::detail::packed_endian_specific_integral< 104 int64_t, target_endianness, 2>; 105 }; 106 107 template <class ELFT> struct ELFDataTypeTypedefHelper; 108 109 /// ELF 32bit types. 110 template <endianness TargetEndianness> 111 struct ELFDataTypeTypedefHelper<ELFType<TargetEndianness, false>> 112 : ELFDataTypeTypedefHelperCommon<TargetEndianness> { 113 using value_type = uint32_t; 114 using Elf_Addr = support::detail::packed_endian_specific_integral< 115 value_type, TargetEndianness, 2>; 116 using Elf_Off = support::detail::packed_endian_specific_integral< 117 value_type, TargetEndianness, 2>; 118 }; 119 120 /// ELF 64bit types. 121 template <endianness TargetEndianness> 122 struct ELFDataTypeTypedefHelper<ELFType<TargetEndianness, true>> 123 : ELFDataTypeTypedefHelperCommon<TargetEndianness> { 124 using value_type = uint64_t; 125 using Elf_Addr = support::detail::packed_endian_specific_integral< 126 value_type, TargetEndianness, 2>; 127 using Elf_Off = support::detail::packed_endian_specific_integral< 128 value_type, TargetEndianness, 2>; 129 }; 130 131 // I really don't like doing this, but the alternative is copypasta. 132 133 #define LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) \ 134 using Elf_Addr = typename ELFT::Addr; \ 135 using Elf_Off = typename ELFT::Off; \ 136 using Elf_Half = typename ELFT::Half; \ 137 using Elf_Word = typename ELFT::Word; \ 138 using Elf_Sword = typename ELFT::Sword; \ 139 using Elf_Xword = typename ELFT::Xword; \ 140 using Elf_Sxword = typename ELFT::Sxword; 141 142 #define LLD_ELF_COMMA , 143 #define LLVM_ELF_IMPORT_TYPES(E, W) \ 144 LLVM_ELF_IMPORT_TYPES_ELFT(ELFType<E LLD_ELF_COMMA W>) 145 146 // Section header. 147 template <class ELFT> struct Elf_Shdr_Base; 148 149 template <endianness TargetEndianness> 150 struct Elf_Shdr_Base<ELFType<TargetEndianness, false>> { 151 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 152 Elf_Word sh_name; // Section name (index into string table) 153 Elf_Word sh_type; // Section type (SHT_*) 154 Elf_Word sh_flags; // Section flags (SHF_*) 155 Elf_Addr sh_addr; // Address where section is to be loaded 156 Elf_Off sh_offset; // File offset of section data, in bytes 157 Elf_Word sh_size; // Size of section, in bytes 158 Elf_Word sh_link; // Section type-specific header table index link 159 Elf_Word sh_info; // Section type-specific extra information 160 Elf_Word sh_addralign; // Section address alignment 161 Elf_Word sh_entsize; // Size of records contained within the section 162 }; 163 164 template <endianness TargetEndianness> 165 struct Elf_Shdr_Base<ELFType<TargetEndianness, true>> { 166 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 167 Elf_Word sh_name; // Section name (index into string table) 168 Elf_Word sh_type; // Section type (SHT_*) 169 Elf_Xword sh_flags; // Section flags (SHF_*) 170 Elf_Addr sh_addr; // Address where section is to be loaded 171 Elf_Off sh_offset; // File offset of section data, in bytes 172 Elf_Xword sh_size; // Size of section, in bytes 173 Elf_Word sh_link; // Section type-specific header table index link 174 Elf_Word sh_info; // Section type-specific extra information 175 Elf_Xword sh_addralign; // Section address alignment 176 Elf_Xword sh_entsize; // Size of records contained within the section 177 }; 178 179 template <class ELFT> 180 struct Elf_Shdr_Impl : Elf_Shdr_Base<ELFT> { 181 using Elf_Shdr_Base<ELFT>::sh_entsize; 182 using Elf_Shdr_Base<ELFT>::sh_size; 183 184 /// @brief Get the number of entities this section contains if it has any. 185 unsigned getEntityCount() const { 186 if (sh_entsize == 0) 187 return 0; 188 return sh_size / sh_entsize; 189 } 190 }; 191 192 template <class ELFT> struct Elf_Sym_Base; 193 194 template <endianness TargetEndianness> 195 struct Elf_Sym_Base<ELFType<TargetEndianness, false>> { 196 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 197 Elf_Word st_name; // Symbol name (index into string table) 198 Elf_Addr st_value; // Value or address associated with the symbol 199 Elf_Word st_size; // Size of the symbol 200 unsigned char st_info; // Symbol's type and binding attributes 201 unsigned char st_other; // Must be zero; reserved 202 Elf_Half st_shndx; // Which section (header table index) it's defined in 203 }; 204 205 template <endianness TargetEndianness> 206 struct Elf_Sym_Base<ELFType<TargetEndianness, true>> { 207 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 208 Elf_Word st_name; // Symbol name (index into string table) 209 unsigned char st_info; // Symbol's type and binding attributes 210 unsigned char st_other; // Must be zero; reserved 211 Elf_Half st_shndx; // Which section (header table index) it's defined in 212 Elf_Addr st_value; // Value or address associated with the symbol 213 Elf_Xword st_size; // Size of the symbol 214 }; 215 216 template <class ELFT> 217 struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> { 218 using Elf_Sym_Base<ELFT>::st_info; 219 using Elf_Sym_Base<ELFT>::st_shndx; 220 using Elf_Sym_Base<ELFT>::st_other; 221 using Elf_Sym_Base<ELFT>::st_value; 222 223 // These accessors and mutators correspond to the ELF32_ST_BIND, 224 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 225 unsigned char getBinding() const { return st_info >> 4; } 226 unsigned char getType() const { return st_info & 0x0f; } 227 uint64_t getValue() const { return st_value; } 228 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 229 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 230 231 void setBindingAndType(unsigned char b, unsigned char t) { 232 st_info = (b << 4) + (t & 0x0f); 233 } 234 235 /// Access to the STV_xxx flag stored in the first two bits of st_other. 236 /// STV_DEFAULT: 0 237 /// STV_INTERNAL: 1 238 /// STV_HIDDEN: 2 239 /// STV_PROTECTED: 3 240 unsigned char getVisibility() const { return st_other & 0x3; } 241 void setVisibility(unsigned char v) { 242 assert(v < 4 && "Invalid value for visibility"); 243 st_other = (st_other & ~0x3) | v; 244 } 245 246 bool isAbsolute() const { return st_shndx == ELF::SHN_ABS; } 247 248 bool isCommon() const { 249 return getType() == ELF::STT_COMMON || st_shndx == ELF::SHN_COMMON; 250 } 251 252 bool isDefined() const { return !isUndefined(); } 253 254 bool isProcessorSpecific() const { 255 return st_shndx >= ELF::SHN_LOPROC && st_shndx <= ELF::SHN_HIPROC; 256 } 257 258 bool isOSSpecific() const { 259 return st_shndx >= ELF::SHN_LOOS && st_shndx <= ELF::SHN_HIOS; 260 } 261 262 bool isReserved() const { 263 // ELF::SHN_HIRESERVE is 0xffff so st_shndx <= ELF::SHN_HIRESERVE is always 264 // true and some compilers warn about it. 265 return st_shndx >= ELF::SHN_LORESERVE; 266 } 267 268 bool isUndefined() const { return st_shndx == ELF::SHN_UNDEF; } 269 270 bool isExternal() const { 271 return getBinding() != ELF::STB_LOCAL; 272 } 273 274 Expected<StringRef> getName(StringRef StrTab) const; 275 }; 276 277 template <class ELFT> 278 Expected<StringRef> Elf_Sym_Impl<ELFT>::getName(StringRef StrTab) const { 279 uint32_t Offset = this->st_name; 280 if (Offset >= StrTab.size()) 281 return errorCodeToError(object_error::parse_failed); 282 return StringRef(StrTab.data() + Offset); 283 } 284 285 /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section 286 /// (.gnu.version). This structure is identical for ELF32 and ELF64. 287 template <class ELFT> 288 struct Elf_Versym_Impl { 289 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 290 Elf_Half vs_index; // Version index with flags (e.g. VERSYM_HIDDEN) 291 }; 292 293 /// Elf_Verdef: This is the structure of entries in the SHT_GNU_verdef section 294 /// (.gnu.version_d). This structure is identical for ELF32 and ELF64. 295 template <class ELFT> 296 struct Elf_Verdef_Impl { 297 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 298 using Elf_Verdaux = Elf_Verdaux_Impl<ELFT>; 299 Elf_Half vd_version; // Version of this structure (e.g. VER_DEF_CURRENT) 300 Elf_Half vd_flags; // Bitwise flags (VER_DEF_*) 301 Elf_Half vd_ndx; // Version index, used in .gnu.version entries 302 Elf_Half vd_cnt; // Number of Verdaux entries 303 Elf_Word vd_hash; // Hash of name 304 Elf_Word vd_aux; // Offset to the first Verdaux entry (in bytes) 305 Elf_Word vd_next; // Offset to the next Verdef entry (in bytes) 306 307 /// Get the first Verdaux entry for this Verdef. 308 const Elf_Verdaux *getAux() const { 309 return reinterpret_cast<const Elf_Verdaux *>((const char *)this + vd_aux); 310 } 311 }; 312 313 /// Elf_Verdaux: This is the structure of auxiliary data in the SHT_GNU_verdef 314 /// section (.gnu.version_d). This structure is identical for ELF32 and ELF64. 315 template <class ELFT> 316 struct Elf_Verdaux_Impl { 317 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 318 Elf_Word vda_name; // Version name (offset in string table) 319 Elf_Word vda_next; // Offset to next Verdaux entry (in bytes) 320 }; 321 322 /// Elf_Verneed: This is the structure of entries in the SHT_GNU_verneed 323 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64. 324 template <class ELFT> 325 struct Elf_Verneed_Impl { 326 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 327 Elf_Half vn_version; // Version of this structure (e.g. VER_NEED_CURRENT) 328 Elf_Half vn_cnt; // Number of associated Vernaux entries 329 Elf_Word vn_file; // Library name (string table offset) 330 Elf_Word vn_aux; // Offset to first Vernaux entry (in bytes) 331 Elf_Word vn_next; // Offset to next Verneed entry (in bytes) 332 }; 333 334 /// Elf_Vernaux: This is the structure of auxiliary data in SHT_GNU_verneed 335 /// section (.gnu.version_r). This structure is identical for ELF32 and ELF64. 336 template <class ELFT> 337 struct Elf_Vernaux_Impl { 338 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 339 Elf_Word vna_hash; // Hash of dependency name 340 Elf_Half vna_flags; // Bitwise Flags (VER_FLAG_*) 341 Elf_Half vna_other; // Version index, used in .gnu.version entries 342 Elf_Word vna_name; // Dependency name 343 Elf_Word vna_next; // Offset to next Vernaux entry (in bytes) 344 }; 345 346 /// Elf_Dyn_Base: This structure matches the form of entries in the dynamic 347 /// table section (.dynamic) look like. 348 template <class ELFT> struct Elf_Dyn_Base; 349 350 template <endianness TargetEndianness> 351 struct Elf_Dyn_Base<ELFType<TargetEndianness, false>> { 352 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 353 Elf_Sword d_tag; 354 union { 355 Elf_Word d_val; 356 Elf_Addr d_ptr; 357 } d_un; 358 }; 359 360 template <endianness TargetEndianness> 361 struct Elf_Dyn_Base<ELFType<TargetEndianness, true>> { 362 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 363 Elf_Sxword d_tag; 364 union { 365 Elf_Xword d_val; 366 Elf_Addr d_ptr; 367 } d_un; 368 }; 369 370 /// Elf_Dyn_Impl: This inherits from Elf_Dyn_Base, adding getters. 371 template <class ELFT> 372 struct Elf_Dyn_Impl : Elf_Dyn_Base<ELFT> { 373 using Elf_Dyn_Base<ELFT>::d_tag; 374 using Elf_Dyn_Base<ELFT>::d_un; 375 using intX_t = typename std::conditional<ELFT::Is64Bits, 376 int64_t, int32_t>::type; 377 using uintX_t = typename std::conditional<ELFT::Is64Bits, 378 uint64_t, uint32_t>::type; 379 intX_t getTag() const { return d_tag; } 380 uintX_t getVal() const { return d_un.d_val; } 381 uintX_t getPtr() const { return d_un.d_ptr; } 382 }; 383 384 template <endianness TargetEndianness> 385 struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> { 386 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 387 static const bool IsRela = false; 388 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) 389 Elf_Word r_info; // Symbol table index and type of relocation to apply 390 391 uint32_t getRInfo(bool isMips64EL) const { 392 assert(!isMips64EL); 393 return r_info; 394 } 395 void setRInfo(uint32_t R, bool IsMips64EL) { 396 assert(!IsMips64EL); 397 r_info = R; 398 } 399 400 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 401 // and ELF32_R_INFO macros defined in the ELF specification: 402 uint32_t getSymbol(bool isMips64EL) const { 403 return this->getRInfo(isMips64EL) >> 8; 404 } 405 unsigned char getType(bool isMips64EL) const { 406 return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff); 407 } 408 void setSymbol(uint32_t s, bool IsMips64EL) { 409 setSymbolAndType(s, getType(), IsMips64EL); 410 } 411 void setType(unsigned char t, bool IsMips64EL) { 412 setSymbolAndType(getSymbol(), t, IsMips64EL); 413 } 414 void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) { 415 this->setRInfo((s << 8) + t, IsMips64EL); 416 } 417 }; 418 419 template <endianness TargetEndianness> 420 struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, true> 421 : public Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> { 422 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 423 static const bool IsRela = true; 424 Elf_Sword r_addend; // Compute value for relocatable field by adding this 425 }; 426 427 template <endianness TargetEndianness> 428 struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> { 429 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 430 static const bool IsRela = false; 431 Elf_Addr r_offset; // Location (file byte offset, or program virtual addr) 432 Elf_Xword r_info; // Symbol table index and type of relocation to apply 433 434 uint64_t getRInfo(bool isMips64EL) const { 435 uint64_t t = r_info; 436 if (!isMips64EL) 437 return t; 438 // Mips64 little endian has a "special" encoding of r_info. Instead of one 439 // 64 bit little endian number, it is a little endian 32 bit number followed 440 // by a 32 bit big endian number. 441 return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) | 442 ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff); 443 } 444 445 void setRInfo(uint64_t R, bool IsMips64EL) { 446 if (IsMips64EL) 447 r_info = (R >> 32) | ((R & 0xff000000) << 8) | ((R & 0x00ff0000) << 24) | 448 ((R & 0x0000ff00) << 40) | ((R & 0x000000ff) << 56); 449 else 450 r_info = R; 451 } 452 453 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 454 // and ELF64_R_INFO macros defined in the ELF specification: 455 uint32_t getSymbol(bool isMips64EL) const { 456 return (uint32_t)(this->getRInfo(isMips64EL) >> 32); 457 } 458 uint32_t getType(bool isMips64EL) const { 459 return (uint32_t)(this->getRInfo(isMips64EL) & 0xffffffffL); 460 } 461 void setSymbol(uint32_t s, bool IsMips64EL) { 462 setSymbolAndType(s, getType(), IsMips64EL); 463 } 464 void setType(uint32_t t, bool IsMips64EL) { 465 setSymbolAndType(getSymbol(), t, IsMips64EL); 466 } 467 void setSymbolAndType(uint32_t s, uint32_t t, bool IsMips64EL) { 468 this->setRInfo(((uint64_t)s << 32) + (t & 0xffffffffL), IsMips64EL); 469 } 470 }; 471 472 template <endianness TargetEndianness> 473 struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, true> 474 : public Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> { 475 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 476 static const bool IsRela = true; 477 Elf_Sxword r_addend; // Compute value for relocatable field by adding this. 478 }; 479 480 template <class ELFT> 481 struct Elf_Ehdr_Impl { 482 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 483 unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes 484 Elf_Half e_type; // Type of file (see ET_*) 485 Elf_Half e_machine; // Required architecture for this file (see EM_*) 486 Elf_Word e_version; // Must be equal to 1 487 Elf_Addr e_entry; // Address to jump to in order to start program 488 Elf_Off e_phoff; // Program header table's file offset, in bytes 489 Elf_Off e_shoff; // Section header table's file offset, in bytes 490 Elf_Word e_flags; // Processor-specific flags 491 Elf_Half e_ehsize; // Size of ELF header, in bytes 492 Elf_Half e_phentsize; // Size of an entry in the program header table 493 Elf_Half e_phnum; // Number of entries in the program header table 494 Elf_Half e_shentsize; // Size of an entry in the section header table 495 Elf_Half e_shnum; // Number of entries in the section header table 496 Elf_Half e_shstrndx; // Section header table index of section name 497 // string table 498 499 bool checkMagic() const { 500 return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0; 501 } 502 503 unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; } 504 unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; } 505 }; 506 507 template <endianness TargetEndianness> 508 struct Elf_Phdr_Impl<ELFType<TargetEndianness, false>> { 509 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 510 Elf_Word p_type; // Type of segment 511 Elf_Off p_offset; // FileOffset where segment is located, in bytes 512 Elf_Addr p_vaddr; // Virtual Address of beginning of segment 513 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 514 Elf_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 515 Elf_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 516 Elf_Word p_flags; // Segment flags 517 Elf_Word p_align; // Segment alignment constraint 518 }; 519 520 template <endianness TargetEndianness> 521 struct Elf_Phdr_Impl<ELFType<TargetEndianness, true>> { 522 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 523 Elf_Word p_type; // Type of segment 524 Elf_Word p_flags; // Segment flags 525 Elf_Off p_offset; // FileOffset where segment is located, in bytes 526 Elf_Addr p_vaddr; // Virtual Address of beginning of segment 527 Elf_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 528 Elf_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 529 Elf_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 530 Elf_Xword p_align; // Segment alignment constraint 531 }; 532 533 // ELFT needed for endianness. 534 template <class ELFT> 535 struct Elf_Hash_Impl { 536 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 537 Elf_Word nbucket; 538 Elf_Word nchain; 539 540 ArrayRef<Elf_Word> buckets() const { 541 return ArrayRef<Elf_Word>(&nbucket + 2, &nbucket + 2 + nbucket); 542 } 543 544 ArrayRef<Elf_Word> chains() const { 545 return ArrayRef<Elf_Word>(&nbucket + 2 + nbucket, 546 &nbucket + 2 + nbucket + nchain); 547 } 548 }; 549 550 // .gnu.hash section 551 template <class ELFT> 552 struct Elf_GnuHash_Impl { 553 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 554 Elf_Word nbuckets; 555 Elf_Word symndx; 556 Elf_Word maskwords; 557 Elf_Word shift2; 558 559 ArrayRef<Elf_Off> filter() const { 560 return ArrayRef<Elf_Off>(reinterpret_cast<const Elf_Off *>(&shift2 + 1), 561 maskwords); 562 } 563 564 ArrayRef<Elf_Word> buckets() const { 565 return ArrayRef<Elf_Word>( 566 reinterpret_cast<const Elf_Word *>(filter().end()), nbuckets); 567 } 568 569 ArrayRef<Elf_Word> values(unsigned DynamicSymCount) const { 570 return ArrayRef<Elf_Word>(buckets().end(), DynamicSymCount - symndx); 571 } 572 }; 573 574 // Compressed section headers. 575 // http://www.sco.com/developers/gabi/latest/ch4.sheader.html#compression_header 576 template <endianness TargetEndianness> 577 struct Elf_Chdr_Impl<ELFType<TargetEndianness, false>> { 578 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 579 Elf_Word ch_type; 580 Elf_Word ch_size; 581 Elf_Word ch_addralign; 582 }; 583 584 template <endianness TargetEndianness> 585 struct Elf_Chdr_Impl<ELFType<TargetEndianness, true>> { 586 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 587 Elf_Word ch_type; 588 Elf_Word ch_reserved; 589 Elf_Xword ch_size; 590 Elf_Xword ch_addralign; 591 }; 592 593 // MIPS .reginfo section 594 template <class ELFT> 595 struct Elf_Mips_RegInfo; 596 597 template <support::endianness TargetEndianness> 598 struct Elf_Mips_RegInfo<ELFType<TargetEndianness, false>> { 599 LLVM_ELF_IMPORT_TYPES(TargetEndianness, false) 600 Elf_Word ri_gprmask; // bit-mask of used general registers 601 Elf_Word ri_cprmask[4]; // bit-mask of used co-processor registers 602 Elf_Addr ri_gp_value; // gp register value 603 }; 604 605 template <support::endianness TargetEndianness> 606 struct Elf_Mips_RegInfo<ELFType<TargetEndianness, true>> { 607 LLVM_ELF_IMPORT_TYPES(TargetEndianness, true) 608 Elf_Word ri_gprmask; // bit-mask of used general registers 609 Elf_Word ri_pad; // unused padding field 610 Elf_Word ri_cprmask[4]; // bit-mask of used co-processor registers 611 Elf_Addr ri_gp_value; // gp register value 612 }; 613 614 // .MIPS.options section 615 template <class ELFT> struct Elf_Mips_Options { 616 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 617 uint8_t kind; // Determines interpretation of variable part of descriptor 618 uint8_t size; // Byte size of descriptor, including this header 619 Elf_Half section; // Section header index of section affected, 620 // or 0 for global options 621 Elf_Word info; // Kind-specific information 622 623 Elf_Mips_RegInfo<ELFT> &getRegInfo() { 624 assert(kind == ELF::ODK_REGINFO); 625 return *reinterpret_cast<Elf_Mips_RegInfo<ELFT> *>( 626 (uint8_t *)this + sizeof(Elf_Mips_Options)); 627 } 628 const Elf_Mips_RegInfo<ELFT> &getRegInfo() const { 629 return const_cast<Elf_Mips_Options *>(this)->getRegInfo(); 630 } 631 }; 632 633 // .MIPS.abiflags section content 634 template <class ELFT> struct Elf_Mips_ABIFlags { 635 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 636 Elf_Half version; // Version of the structure 637 uint8_t isa_level; // ISA level: 1-5, 32, and 64 638 uint8_t isa_rev; // ISA revision (0 for MIPS I - MIPS V) 639 uint8_t gpr_size; // General purpose registers size 640 uint8_t cpr1_size; // Co-processor 1 registers size 641 uint8_t cpr2_size; // Co-processor 2 registers size 642 uint8_t fp_abi; // Floating-point ABI flag 643 Elf_Word isa_ext; // Processor-specific extension 644 Elf_Word ases; // ASEs flags 645 Elf_Word flags1; // General flags 646 Elf_Word flags2; // General flags 647 }; 648 649 } // end namespace object. 650 } // end namespace llvm. 651 652 #endif // LLVM_OBJECT_ELFTYPES_H 653