1 //===- ELFDumper.cpp - ELF-specific dumper --------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// This file implements the ELF-specific dumper for llvm-readobj. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "ARMEHABIPrinter.h" 15 #include "DwarfCFIEHPrinter.h" 16 #include "ObjDumper.h" 17 #include "StackMapPrinter.h" 18 #include "llvm-readobj.h" 19 #include "llvm/ADT/ArrayRef.h" 20 #include "llvm/ADT/DenseMap.h" 21 #include "llvm/ADT/DenseSet.h" 22 #include "llvm/ADT/MapVector.h" 23 #include "llvm/ADT/Optional.h" 24 #include "llvm/ADT/PointerIntPair.h" 25 #include "llvm/ADT/STLExtras.h" 26 #include "llvm/ADT/SmallString.h" 27 #include "llvm/ADT/SmallVector.h" 28 #include "llvm/ADT/StringExtras.h" 29 #include "llvm/ADT/StringRef.h" 30 #include "llvm/ADT/Twine.h" 31 #include "llvm/BinaryFormat/AMDGPUMetadataVerifier.h" 32 #include "llvm/BinaryFormat/ELF.h" 33 #include "llvm/Demangle/Demangle.h" 34 #include "llvm/Object/ELF.h" 35 #include "llvm/Object/ELFObjectFile.h" 36 #include "llvm/Object/ELFTypes.h" 37 #include "llvm/Object/Error.h" 38 #include "llvm/Object/ObjectFile.h" 39 #include "llvm/Object/RelocationResolver.h" 40 #include "llvm/Object/StackMapParser.h" 41 #include "llvm/Support/AMDGPUMetadata.h" 42 #include "llvm/Support/ARMAttributeParser.h" 43 #include "llvm/Support/ARMBuildAttributes.h" 44 #include "llvm/Support/Casting.h" 45 #include "llvm/Support/Compiler.h" 46 #include "llvm/Support/Endian.h" 47 #include "llvm/Support/ErrorHandling.h" 48 #include "llvm/Support/Format.h" 49 #include "llvm/Support/FormatVariadic.h" 50 #include "llvm/Support/FormattedStream.h" 51 #include "llvm/Support/LEB128.h" 52 #include "llvm/Support/MathExtras.h" 53 #include "llvm/Support/MipsABIFlags.h" 54 #include "llvm/Support/RISCVAttributeParser.h" 55 #include "llvm/Support/RISCVAttributes.h" 56 #include "llvm/Support/ScopedPrinter.h" 57 #include "llvm/Support/raw_ostream.h" 58 #include <algorithm> 59 #include <cinttypes> 60 #include <cstddef> 61 #include <cstdint> 62 #include <cstdlib> 63 #include <iterator> 64 #include <memory> 65 #include <string> 66 #include <system_error> 67 #include <vector> 68 69 using namespace llvm; 70 using namespace llvm::object; 71 using namespace ELF; 72 73 #define LLVM_READOBJ_ENUM_CASE(ns, enum) \ 74 case ns::enum: \ 75 return #enum; 76 77 #define ENUM_ENT(enum, altName) \ 78 { #enum, altName, ELF::enum } 79 80 #define ENUM_ENT_1(enum) \ 81 { #enum, #enum, ELF::enum } 82 83 namespace { 84 85 template <class ELFT> struct RelSymbol { 86 RelSymbol(const typename ELFT::Sym *S, StringRef N) 87 : Sym(S), Name(N.str()) {} 88 const typename ELFT::Sym *Sym; 89 std::string Name; 90 }; 91 92 /// Represents a contiguous uniform range in the file. We cannot just create a 93 /// range directly because when creating one of these from the .dynamic table 94 /// the size, entity size and virtual address are different entries in arbitrary 95 /// order (DT_REL, DT_RELSZ, DT_RELENT for example). 96 struct DynRegionInfo { 97 DynRegionInfo(const Binary &Owner, const ObjDumper &D) 98 : Obj(&Owner), Dumper(&D) {} 99 DynRegionInfo(const Binary &Owner, const ObjDumper &D, const uint8_t *A, 100 uint64_t S, uint64_t ES) 101 : Addr(A), Size(S), EntSize(ES), Obj(&Owner), Dumper(&D) {} 102 103 /// Address in current address space. 104 const uint8_t *Addr = nullptr; 105 /// Size in bytes of the region. 106 uint64_t Size = 0; 107 /// Size of each entity in the region. 108 uint64_t EntSize = 0; 109 110 /// Owner object. Used for error reporting. 111 const Binary *Obj; 112 /// Dumper used for error reporting. 113 const ObjDumper *Dumper; 114 /// Error prefix. Used for error reporting to provide more information. 115 std::string Context; 116 /// Region size name. Used for error reporting. 117 StringRef SizePrintName = "size"; 118 /// Entry size name. Used for error reporting. If this field is empty, errors 119 /// will not mention the entry size. 120 StringRef EntSizePrintName = "entry size"; 121 122 template <typename Type> ArrayRef<Type> getAsArrayRef() const { 123 const Type *Start = reinterpret_cast<const Type *>(Addr); 124 if (!Start) 125 return {Start, Start}; 126 127 const uint64_t Offset = 128 Addr - (const uint8_t *)Obj->getMemoryBufferRef().getBufferStart(); 129 const uint64_t ObjSize = Obj->getMemoryBufferRef().getBufferSize(); 130 131 if (Size > ObjSize - Offset) { 132 Dumper->reportUniqueWarning( 133 "unable to read data at 0x" + Twine::utohexstr(Offset) + 134 " of size 0x" + Twine::utohexstr(Size) + " (" + SizePrintName + 135 "): it goes past the end of the file of size 0x" + 136 Twine::utohexstr(ObjSize)); 137 return {Start, Start}; 138 } 139 140 if (EntSize == sizeof(Type) && (Size % EntSize == 0)) 141 return {Start, Start + (Size / EntSize)}; 142 143 std::string Msg; 144 if (!Context.empty()) 145 Msg += Context + " has "; 146 147 Msg += ("invalid " + SizePrintName + " (0x" + Twine::utohexstr(Size) + ")") 148 .str(); 149 if (!EntSizePrintName.empty()) 150 Msg += 151 (" or " + EntSizePrintName + " (0x" + Twine::utohexstr(EntSize) + ")") 152 .str(); 153 154 Dumper->reportUniqueWarning(Msg); 155 return {Start, Start}; 156 } 157 }; 158 159 struct GroupMember { 160 StringRef Name; 161 uint64_t Index; 162 }; 163 164 struct GroupSection { 165 StringRef Name; 166 std::string Signature; 167 uint64_t ShName; 168 uint64_t Index; 169 uint32_t Link; 170 uint32_t Info; 171 uint32_t Type; 172 std::vector<GroupMember> Members; 173 }; 174 175 namespace { 176 177 struct NoteType { 178 uint32_t ID; 179 StringRef Name; 180 }; 181 182 } // namespace 183 184 template <class ELFT> class Relocation { 185 public: 186 Relocation(const typename ELFT::Rel &R, bool IsMips64EL) 187 : Type(R.getType(IsMips64EL)), Symbol(R.getSymbol(IsMips64EL)), 188 Offset(R.r_offset), Info(R.r_info) {} 189 190 Relocation(const typename ELFT::Rela &R, bool IsMips64EL) 191 : Relocation((const typename ELFT::Rel &)R, IsMips64EL) { 192 Addend = R.r_addend; 193 } 194 195 uint32_t Type; 196 uint32_t Symbol; 197 typename ELFT::uint Offset; 198 typename ELFT::uint Info; 199 Optional<int64_t> Addend; 200 }; 201 202 template <class ELFT> class MipsGOTParser; 203 204 template <typename ELFT> class ELFDumper : public ObjDumper { 205 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 206 207 public: 208 ELFDumper(const object::ELFObjectFile<ELFT> &ObjF, ScopedPrinter &Writer); 209 210 void printUnwindInfo() override; 211 void printNeededLibraries() override; 212 void printHashTable() override; 213 void printGnuHashTable() override; 214 void printLoadName() override; 215 void printVersionInfo() override; 216 void printArchSpecificInfo() override; 217 void printStackMap() const override; 218 219 const object::ELFObjectFile<ELFT> &getElfObject() const { return ObjF; }; 220 221 std::string describe(const Elf_Shdr &Sec) const; 222 223 unsigned getHashTableEntSize() const { 224 // EM_S390 and ELF::EM_ALPHA platforms use 8-bytes entries in SHT_HASH 225 // sections. This violates the ELF specification. 226 if (Obj.getHeader().e_machine == ELF::EM_S390 || 227 Obj.getHeader().e_machine == ELF::EM_ALPHA) 228 return 8; 229 return 4; 230 } 231 232 Elf_Dyn_Range dynamic_table() const { 233 // A valid .dynamic section contains an array of entries terminated 234 // with a DT_NULL entry. However, sometimes the section content may 235 // continue past the DT_NULL entry, so to dump the section correctly, 236 // we first find the end of the entries by iterating over them. 237 Elf_Dyn_Range Table = DynamicTable.template getAsArrayRef<Elf_Dyn>(); 238 239 size_t Size = 0; 240 while (Size < Table.size()) 241 if (Table[Size++].getTag() == DT_NULL) 242 break; 243 244 return Table.slice(0, Size); 245 } 246 247 Elf_Sym_Range dynamic_symbols() const { 248 if (!DynSymRegion) 249 return Elf_Sym_Range(); 250 return DynSymRegion->template getAsArrayRef<Elf_Sym>(); 251 } 252 253 const Elf_Shdr *findSectionByName(StringRef Name) const; 254 255 StringRef getDynamicStringTable() const { return DynamicStringTable; } 256 257 protected: 258 virtual void printVersionSymbolSection(const Elf_Shdr *Sec) = 0; 259 virtual void printVersionDefinitionSection(const Elf_Shdr *Sec) = 0; 260 virtual void printVersionDependencySection(const Elf_Shdr *Sec) = 0; 261 262 void 263 printDependentLibsHelper(function_ref<void(const Elf_Shdr &)> OnSectionStart, 264 function_ref<void(StringRef, uint64_t)> OnLibEntry); 265 266 virtual void printRelRelaReloc(const Relocation<ELFT> &R, 267 const RelSymbol<ELFT> &RelSym) = 0; 268 virtual void printRelrReloc(const Elf_Relr &R) = 0; 269 virtual void printDynamicRelocHeader(unsigned Type, StringRef Name, 270 const DynRegionInfo &Reg) {} 271 void printReloc(const Relocation<ELFT> &R, unsigned RelIndex, 272 const Elf_Shdr &Sec, const Elf_Shdr *SymTab); 273 void printDynamicReloc(const Relocation<ELFT> &R); 274 void printDynamicRelocationsHelper(); 275 void printRelocationsHelper(const Elf_Shdr &Sec); 276 void forEachRelocationDo( 277 const Elf_Shdr &Sec, bool RawRelr, 278 llvm::function_ref<void(const Relocation<ELFT> &, unsigned, 279 const Elf_Shdr &, const Elf_Shdr *)> 280 RelRelaFn, 281 llvm::function_ref<void(const Elf_Relr &)> RelrFn); 282 283 virtual void printSymtabMessage(const Elf_Shdr *Symtab, size_t Offset, 284 bool NonVisibilityBitsUsed) const {}; 285 virtual void printSymbol(const Elf_Sym &Symbol, unsigned SymIndex, 286 DataRegion<Elf_Word> ShndxTable, 287 Optional<StringRef> StrTable, bool IsDynamic, 288 bool NonVisibilityBitsUsed) const = 0; 289 290 virtual void printMipsABIFlags() = 0; 291 virtual void printMipsGOT(const MipsGOTParser<ELFT> &Parser) = 0; 292 virtual void printMipsPLT(const MipsGOTParser<ELFT> &Parser) = 0; 293 294 Expected<ArrayRef<Elf_Versym>> 295 getVersionTable(const Elf_Shdr &Sec, ArrayRef<Elf_Sym> *SymTab, 296 StringRef *StrTab, const Elf_Shdr **SymTabSec) const; 297 StringRef getPrintableSectionName(const Elf_Shdr &Sec) const; 298 299 std::vector<GroupSection> getGroups(); 300 301 // Returns the function symbol index for the given address. Matches the 302 // symbol's section with FunctionSec when specified. 303 // Returns None if no function symbol can be found for the address or in case 304 // it is not defined in the specified section. 305 SmallVector<uint32_t> 306 getSymbolIndexesForFunctionAddress(uint64_t SymValue, 307 Optional<const Elf_Shdr *> FunctionSec); 308 bool printFunctionStackSize(uint64_t SymValue, 309 Optional<const Elf_Shdr *> FunctionSec, 310 const Elf_Shdr &StackSizeSec, DataExtractor Data, 311 uint64_t *Offset); 312 void printStackSize(const Relocation<ELFT> &R, const Elf_Shdr &RelocSec, 313 unsigned Ndx, const Elf_Shdr *SymTab, 314 const Elf_Shdr *FunctionSec, const Elf_Shdr &StackSizeSec, 315 const RelocationResolver &Resolver, DataExtractor Data); 316 virtual void printStackSizeEntry(uint64_t Size, 317 ArrayRef<std::string> FuncNames) = 0; 318 319 void printRelocatableStackSizes(std::function<void()> PrintHeader); 320 void printNonRelocatableStackSizes(std::function<void()> PrintHeader); 321 322 /// Retrieves sections with corresponding relocation sections based on 323 /// IsMatch. 324 void getSectionAndRelocations( 325 std::function<bool(const Elf_Shdr &)> IsMatch, 326 llvm::MapVector<const Elf_Shdr *, const Elf_Shdr *> &SecToRelocMap); 327 328 const object::ELFObjectFile<ELFT> &ObjF; 329 const ELFFile<ELFT> &Obj; 330 StringRef FileName; 331 332 Expected<DynRegionInfo> createDRI(uint64_t Offset, uint64_t Size, 333 uint64_t EntSize) { 334 if (Offset + Size < Offset || Offset + Size > Obj.getBufSize()) 335 return createError("offset (0x" + Twine::utohexstr(Offset) + 336 ") + size (0x" + Twine::utohexstr(Size) + 337 ") is greater than the file size (0x" + 338 Twine::utohexstr(Obj.getBufSize()) + ")"); 339 return DynRegionInfo(ObjF, *this, Obj.base() + Offset, Size, EntSize); 340 } 341 342 void printAttributes(unsigned, std::unique_ptr<ELFAttributeParser>, 343 support::endianness); 344 void printMipsReginfo(); 345 void printMipsOptions(); 346 347 std::pair<const Elf_Phdr *, const Elf_Shdr *> findDynamic(); 348 void loadDynamicTable(); 349 void parseDynamicTable(); 350 351 Expected<StringRef> getSymbolVersion(const Elf_Sym &Sym, 352 bool &IsDefault) const; 353 Expected<SmallVector<Optional<VersionEntry>, 0> *> getVersionMap() const; 354 355 DynRegionInfo DynRelRegion; 356 DynRegionInfo DynRelaRegion; 357 DynRegionInfo DynRelrRegion; 358 DynRegionInfo DynPLTRelRegion; 359 Optional<DynRegionInfo> DynSymRegion; 360 DynRegionInfo DynSymTabShndxRegion; 361 DynRegionInfo DynamicTable; 362 StringRef DynamicStringTable; 363 const Elf_Hash *HashTable = nullptr; 364 const Elf_GnuHash *GnuHashTable = nullptr; 365 const Elf_Shdr *DotSymtabSec = nullptr; 366 const Elf_Shdr *DotDynsymSec = nullptr; 367 const Elf_Shdr *DotAddrsigSec = nullptr; 368 DenseMap<const Elf_Shdr *, ArrayRef<Elf_Word>> ShndxTables; 369 Optional<uint64_t> SONameOffset; 370 Optional<DenseMap<uint64_t, std::vector<uint32_t>>> AddressToIndexMap; 371 372 const Elf_Shdr *SymbolVersionSection = nullptr; // .gnu.version 373 const Elf_Shdr *SymbolVersionNeedSection = nullptr; // .gnu.version_r 374 const Elf_Shdr *SymbolVersionDefSection = nullptr; // .gnu.version_d 375 376 std::string getFullSymbolName(const Elf_Sym &Symbol, unsigned SymIndex, 377 DataRegion<Elf_Word> ShndxTable, 378 Optional<StringRef> StrTable, 379 bool IsDynamic) const; 380 Expected<unsigned> 381 getSymbolSectionIndex(const Elf_Sym &Symbol, unsigned SymIndex, 382 DataRegion<Elf_Word> ShndxTable) const; 383 Expected<StringRef> getSymbolSectionName(const Elf_Sym &Symbol, 384 unsigned SectionIndex) const; 385 std::string getStaticSymbolName(uint32_t Index) const; 386 StringRef getDynamicString(uint64_t Value) const; 387 388 void printSymbolsHelper(bool IsDynamic) const; 389 std::string getDynamicEntry(uint64_t Type, uint64_t Value) const; 390 391 Expected<RelSymbol<ELFT>> getRelocationTarget(const Relocation<ELFT> &R, 392 const Elf_Shdr *SymTab) const; 393 394 ArrayRef<Elf_Word> getShndxTable(const Elf_Shdr *Symtab) const; 395 396 private: 397 mutable SmallVector<Optional<VersionEntry>, 0> VersionMap; 398 }; 399 400 template <class ELFT> 401 std::string ELFDumper<ELFT>::describe(const Elf_Shdr &Sec) const { 402 return ::describe(Obj, Sec); 403 } 404 405 namespace { 406 407 template <class ELFT> struct SymtabLink { 408 typename ELFT::SymRange Symbols; 409 StringRef StringTable; 410 const typename ELFT::Shdr *SymTab; 411 }; 412 413 // Returns the linked symbol table, symbols and associated string table for a 414 // given section. 415 template <class ELFT> 416 Expected<SymtabLink<ELFT>> getLinkAsSymtab(const ELFFile<ELFT> &Obj, 417 const typename ELFT::Shdr &Sec, 418 unsigned ExpectedType) { 419 Expected<const typename ELFT::Shdr *> SymtabOrErr = 420 Obj.getSection(Sec.sh_link); 421 if (!SymtabOrErr) 422 return createError("invalid section linked to " + describe(Obj, Sec) + 423 ": " + toString(SymtabOrErr.takeError())); 424 425 if ((*SymtabOrErr)->sh_type != ExpectedType) 426 return createError( 427 "invalid section linked to " + describe(Obj, Sec) + ": expected " + 428 object::getELFSectionTypeName(Obj.getHeader().e_machine, ExpectedType) + 429 ", but got " + 430 object::getELFSectionTypeName(Obj.getHeader().e_machine, 431 (*SymtabOrErr)->sh_type)); 432 433 Expected<StringRef> StrTabOrErr = Obj.getLinkAsStrtab(**SymtabOrErr); 434 if (!StrTabOrErr) 435 return createError( 436 "can't get a string table for the symbol table linked to " + 437 describe(Obj, Sec) + ": " + toString(StrTabOrErr.takeError())); 438 439 Expected<typename ELFT::SymRange> SymsOrErr = Obj.symbols(*SymtabOrErr); 440 if (!SymsOrErr) 441 return createError("unable to read symbols from the " + describe(Obj, Sec) + 442 ": " + toString(SymsOrErr.takeError())); 443 444 return SymtabLink<ELFT>{*SymsOrErr, *StrTabOrErr, *SymtabOrErr}; 445 } 446 447 } // namespace 448 449 template <class ELFT> 450 Expected<ArrayRef<typename ELFT::Versym>> 451 ELFDumper<ELFT>::getVersionTable(const Elf_Shdr &Sec, ArrayRef<Elf_Sym> *SymTab, 452 StringRef *StrTab, 453 const Elf_Shdr **SymTabSec) const { 454 assert((!SymTab && !StrTab && !SymTabSec) || (SymTab && StrTab && SymTabSec)); 455 if (reinterpret_cast<uintptr_t>(Obj.base() + Sec.sh_offset) % 456 sizeof(uint16_t) != 457 0) 458 return createError("the " + describe(Sec) + " is misaligned"); 459 460 Expected<ArrayRef<Elf_Versym>> VersionsOrErr = 461 Obj.template getSectionContentsAsArray<Elf_Versym>(Sec); 462 if (!VersionsOrErr) 463 return createError("cannot read content of " + describe(Sec) + ": " + 464 toString(VersionsOrErr.takeError())); 465 466 Expected<SymtabLink<ELFT>> SymTabOrErr = 467 getLinkAsSymtab(Obj, Sec, SHT_DYNSYM); 468 if (!SymTabOrErr) { 469 reportUniqueWarning(SymTabOrErr.takeError()); 470 return *VersionsOrErr; 471 } 472 473 if (SymTabOrErr->Symbols.size() != VersionsOrErr->size()) 474 reportUniqueWarning(describe(Sec) + ": the number of entries (" + 475 Twine(VersionsOrErr->size()) + 476 ") does not match the number of symbols (" + 477 Twine(SymTabOrErr->Symbols.size()) + 478 ") in the symbol table with index " + 479 Twine(Sec.sh_link)); 480 481 if (SymTab) { 482 *SymTab = SymTabOrErr->Symbols; 483 *StrTab = SymTabOrErr->StringTable; 484 *SymTabSec = SymTabOrErr->SymTab; 485 } 486 return *VersionsOrErr; 487 } 488 489 template <class ELFT> 490 void ELFDumper<ELFT>::printSymbolsHelper(bool IsDynamic) const { 491 Optional<StringRef> StrTable; 492 size_t Entries = 0; 493 Elf_Sym_Range Syms(nullptr, nullptr); 494 const Elf_Shdr *SymtabSec = IsDynamic ? DotDynsymSec : DotSymtabSec; 495 496 if (IsDynamic) { 497 StrTable = DynamicStringTable; 498 Syms = dynamic_symbols(); 499 Entries = Syms.size(); 500 } else if (DotSymtabSec) { 501 if (Expected<StringRef> StrTableOrErr = 502 Obj.getStringTableForSymtab(*DotSymtabSec)) 503 StrTable = *StrTableOrErr; 504 else 505 reportUniqueWarning( 506 "unable to get the string table for the SHT_SYMTAB section: " + 507 toString(StrTableOrErr.takeError())); 508 509 if (Expected<Elf_Sym_Range> SymsOrErr = Obj.symbols(DotSymtabSec)) 510 Syms = *SymsOrErr; 511 else 512 reportUniqueWarning( 513 "unable to read symbols from the SHT_SYMTAB section: " + 514 toString(SymsOrErr.takeError())); 515 Entries = DotSymtabSec->getEntityCount(); 516 } 517 if (Syms.empty()) 518 return; 519 520 // The st_other field has 2 logical parts. The first two bits hold the symbol 521 // visibility (STV_*) and the remainder hold other platform-specific values. 522 bool NonVisibilityBitsUsed = 523 llvm::any_of(Syms, [](const Elf_Sym &S) { return S.st_other & ~0x3; }); 524 525 DataRegion<Elf_Word> ShndxTable = 526 IsDynamic ? DataRegion<Elf_Word>( 527 (const Elf_Word *)this->DynSymTabShndxRegion.Addr, 528 this->getElfObject().getELFFile().end()) 529 : DataRegion<Elf_Word>(this->getShndxTable(SymtabSec)); 530 531 printSymtabMessage(SymtabSec, Entries, NonVisibilityBitsUsed); 532 for (const Elf_Sym &Sym : Syms) 533 printSymbol(Sym, &Sym - Syms.begin(), ShndxTable, StrTable, IsDynamic, 534 NonVisibilityBitsUsed); 535 } 536 537 template <typename ELFT> class GNUELFDumper : public ELFDumper<ELFT> { 538 formatted_raw_ostream &OS; 539 540 public: 541 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 542 543 GNUELFDumper(const object::ELFObjectFile<ELFT> &ObjF, ScopedPrinter &Writer) 544 : ELFDumper<ELFT>(ObjF, Writer), 545 OS(static_cast<formatted_raw_ostream &>(Writer.getOStream())) { 546 assert(&this->W.getOStream() == &llvm::fouts()); 547 } 548 549 void printFileHeaders() override; 550 void printGroupSections() override; 551 void printRelocations() override; 552 void printSectionHeaders() override; 553 void printSymbols(bool PrintSymbols, bool PrintDynamicSymbols) override; 554 void printHashSymbols() override; 555 void printSectionDetails() override; 556 void printDependentLibs() override; 557 void printDynamicTable() override; 558 void printDynamicRelocations() override; 559 void printSymtabMessage(const Elf_Shdr *Symtab, size_t Offset, 560 bool NonVisibilityBitsUsed) const override; 561 void printProgramHeaders(bool PrintProgramHeaders, 562 cl::boolOrDefault PrintSectionMapping) override; 563 void printVersionSymbolSection(const Elf_Shdr *Sec) override; 564 void printVersionDefinitionSection(const Elf_Shdr *Sec) override; 565 void printVersionDependencySection(const Elf_Shdr *Sec) override; 566 void printHashHistograms() override; 567 void printCGProfile() override; 568 void printBBAddrMaps() override; 569 void printAddrsig() override; 570 void printNotes() override; 571 void printELFLinkerOptions() override; 572 void printStackSizes() override; 573 574 private: 575 void printHashHistogram(const Elf_Hash &HashTable); 576 void printGnuHashHistogram(const Elf_GnuHash &GnuHashTable); 577 void printHashTableSymbols(const Elf_Hash &HashTable); 578 void printGnuHashTableSymbols(const Elf_GnuHash &GnuHashTable); 579 580 struct Field { 581 std::string Str; 582 unsigned Column; 583 584 Field(StringRef S, unsigned Col) : Str(std::string(S)), Column(Col) {} 585 Field(unsigned Col) : Column(Col) {} 586 }; 587 588 template <typename T, typename TEnum> 589 std::string printEnum(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues) const { 590 for (const EnumEntry<TEnum> &EnumItem : EnumValues) 591 if (EnumItem.Value == Value) 592 return std::string(EnumItem.AltName); 593 return to_hexString(Value, false); 594 } 595 596 template <typename T, typename TEnum> 597 std::string printFlags(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues, 598 TEnum EnumMask1 = {}, TEnum EnumMask2 = {}, 599 TEnum EnumMask3 = {}) const { 600 std::string Str; 601 for (const EnumEntry<TEnum> &Flag : EnumValues) { 602 if (Flag.Value == 0) 603 continue; 604 605 TEnum EnumMask{}; 606 if (Flag.Value & EnumMask1) 607 EnumMask = EnumMask1; 608 else if (Flag.Value & EnumMask2) 609 EnumMask = EnumMask2; 610 else if (Flag.Value & EnumMask3) 611 EnumMask = EnumMask3; 612 bool IsEnum = (Flag.Value & EnumMask) != 0; 613 if ((!IsEnum && (Value & Flag.Value) == Flag.Value) || 614 (IsEnum && (Value & EnumMask) == Flag.Value)) { 615 if (!Str.empty()) 616 Str += ", "; 617 Str += Flag.AltName; 618 } 619 } 620 return Str; 621 } 622 623 formatted_raw_ostream &printField(struct Field F) const { 624 if (F.Column != 0) 625 OS.PadToColumn(F.Column); 626 OS << F.Str; 627 OS.flush(); 628 return OS; 629 } 630 void printHashedSymbol(const Elf_Sym *Sym, unsigned SymIndex, 631 DataRegion<Elf_Word> ShndxTable, StringRef StrTable, 632 uint32_t Bucket); 633 void printRelrReloc(const Elf_Relr &R) override; 634 void printRelRelaReloc(const Relocation<ELFT> &R, 635 const RelSymbol<ELFT> &RelSym) override; 636 void printSymbol(const Elf_Sym &Symbol, unsigned SymIndex, 637 DataRegion<Elf_Word> ShndxTable, 638 Optional<StringRef> StrTable, bool IsDynamic, 639 bool NonVisibilityBitsUsed) const override; 640 void printDynamicRelocHeader(unsigned Type, StringRef Name, 641 const DynRegionInfo &Reg) override; 642 643 std::string getSymbolSectionNdx(const Elf_Sym &Symbol, unsigned SymIndex, 644 DataRegion<Elf_Word> ShndxTable) const; 645 void printProgramHeaders() override; 646 void printSectionMapping() override; 647 void printGNUVersionSectionProlog(const typename ELFT::Shdr &Sec, 648 const Twine &Label, unsigned EntriesNum); 649 650 void printStackSizeEntry(uint64_t Size, 651 ArrayRef<std::string> FuncNames) override; 652 653 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 654 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 655 void printMipsABIFlags() override; 656 }; 657 658 template <typename ELFT> class LLVMELFDumper : public ELFDumper<ELFT> { 659 public: 660 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 661 662 LLVMELFDumper(const object::ELFObjectFile<ELFT> &ObjF, ScopedPrinter &Writer) 663 : ELFDumper<ELFT>(ObjF, Writer), W(Writer) {} 664 665 void printFileHeaders() override; 666 void printGroupSections() override; 667 void printRelocations() override; 668 void printSectionHeaders() override; 669 void printSymbols(bool PrintSymbols, bool PrintDynamicSymbols) override; 670 void printDependentLibs() override; 671 void printDynamicTable() override; 672 void printDynamicRelocations() override; 673 void printProgramHeaders(bool PrintProgramHeaders, 674 cl::boolOrDefault PrintSectionMapping) override; 675 void printVersionSymbolSection(const Elf_Shdr *Sec) override; 676 void printVersionDefinitionSection(const Elf_Shdr *Sec) override; 677 void printVersionDependencySection(const Elf_Shdr *Sec) override; 678 void printHashHistograms() override; 679 void printCGProfile() override; 680 void printBBAddrMaps() override; 681 void printAddrsig() override; 682 void printNotes() override; 683 void printELFLinkerOptions() override; 684 void printStackSizes() override; 685 686 private: 687 void printRelrReloc(const Elf_Relr &R) override; 688 void printRelRelaReloc(const Relocation<ELFT> &R, 689 const RelSymbol<ELFT> &RelSym) override; 690 691 void printSymbolSection(const Elf_Sym &Symbol, unsigned SymIndex, 692 DataRegion<Elf_Word> ShndxTable) const; 693 void printSymbol(const Elf_Sym &Symbol, unsigned SymIndex, 694 DataRegion<Elf_Word> ShndxTable, 695 Optional<StringRef> StrTable, bool IsDynamic, 696 bool /*NonVisibilityBitsUsed*/) const override; 697 void printProgramHeaders() override; 698 void printSectionMapping() override {} 699 void printStackSizeEntry(uint64_t Size, 700 ArrayRef<std::string> FuncNames) override; 701 702 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 703 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 704 void printMipsABIFlags() override; 705 706 ScopedPrinter &W; 707 }; 708 709 } // end anonymous namespace 710 711 namespace llvm { 712 713 template <class ELFT> 714 static std::unique_ptr<ObjDumper> 715 createELFDumper(const ELFObjectFile<ELFT> &Obj, ScopedPrinter &Writer) { 716 if (opts::Output == opts::GNU) 717 return std::make_unique<GNUELFDumper<ELFT>>(Obj, Writer); 718 return std::make_unique<LLVMELFDumper<ELFT>>(Obj, Writer); 719 } 720 721 std::unique_ptr<ObjDumper> createELFDumper(const object::ELFObjectFileBase &Obj, 722 ScopedPrinter &Writer) { 723 // Little-endian 32-bit 724 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(&Obj)) 725 return createELFDumper(*ELFObj, Writer); 726 727 // Big-endian 32-bit 728 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(&Obj)) 729 return createELFDumper(*ELFObj, Writer); 730 731 // Little-endian 64-bit 732 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(&Obj)) 733 return createELFDumper(*ELFObj, Writer); 734 735 // Big-endian 64-bit 736 return createELFDumper(*cast<ELF64BEObjectFile>(&Obj), Writer); 737 } 738 739 } // end namespace llvm 740 741 template <class ELFT> 742 Expected<SmallVector<Optional<VersionEntry>, 0> *> 743 ELFDumper<ELFT>::getVersionMap() const { 744 // If the VersionMap has already been loaded or if there is no dynamic symtab 745 // or version table, there is nothing to do. 746 if (!VersionMap.empty() || !DynSymRegion || !SymbolVersionSection) 747 return &VersionMap; 748 749 Expected<SmallVector<Optional<VersionEntry>, 0>> MapOrErr = 750 Obj.loadVersionMap(SymbolVersionNeedSection, SymbolVersionDefSection); 751 if (MapOrErr) 752 VersionMap = *MapOrErr; 753 else 754 return MapOrErr.takeError(); 755 756 return &VersionMap; 757 } 758 759 template <typename ELFT> 760 Expected<StringRef> ELFDumper<ELFT>::getSymbolVersion(const Elf_Sym &Sym, 761 bool &IsDefault) const { 762 // This is a dynamic symbol. Look in the GNU symbol version table. 763 if (!SymbolVersionSection) { 764 // No version table. 765 IsDefault = false; 766 return ""; 767 } 768 769 assert(DynSymRegion && "DynSymRegion has not been initialised"); 770 // Determine the position in the symbol table of this entry. 771 size_t EntryIndex = (reinterpret_cast<uintptr_t>(&Sym) - 772 reinterpret_cast<uintptr_t>(DynSymRegion->Addr)) / 773 sizeof(Elf_Sym); 774 775 // Get the corresponding version index entry. 776 Expected<const Elf_Versym *> EntryOrErr = 777 Obj.template getEntry<Elf_Versym>(*SymbolVersionSection, EntryIndex); 778 if (!EntryOrErr) 779 return EntryOrErr.takeError(); 780 781 unsigned Version = (*EntryOrErr)->vs_index; 782 if (Version == VER_NDX_LOCAL || Version == VER_NDX_GLOBAL) { 783 IsDefault = false; 784 return ""; 785 } 786 787 Expected<SmallVector<Optional<VersionEntry>, 0> *> MapOrErr = 788 getVersionMap(); 789 if (!MapOrErr) 790 return MapOrErr.takeError(); 791 792 return Obj.getSymbolVersionByIndex(Version, IsDefault, **MapOrErr, 793 Sym.st_shndx == ELF::SHN_UNDEF); 794 } 795 796 template <typename ELFT> 797 Expected<RelSymbol<ELFT>> 798 ELFDumper<ELFT>::getRelocationTarget(const Relocation<ELFT> &R, 799 const Elf_Shdr *SymTab) const { 800 if (R.Symbol == 0) 801 return RelSymbol<ELFT>(nullptr, ""); 802 803 Expected<const Elf_Sym *> SymOrErr = 804 Obj.template getEntry<Elf_Sym>(*SymTab, R.Symbol); 805 if (!SymOrErr) 806 return createError("unable to read an entry with index " + Twine(R.Symbol) + 807 " from " + describe(*SymTab) + ": " + 808 toString(SymOrErr.takeError())); 809 const Elf_Sym *Sym = *SymOrErr; 810 if (!Sym) 811 return RelSymbol<ELFT>(nullptr, ""); 812 813 Expected<StringRef> StrTableOrErr = Obj.getStringTableForSymtab(*SymTab); 814 if (!StrTableOrErr) 815 return StrTableOrErr.takeError(); 816 817 const Elf_Sym *FirstSym = 818 cantFail(Obj.template getEntry<Elf_Sym>(*SymTab, 0)); 819 std::string SymbolName = 820 getFullSymbolName(*Sym, Sym - FirstSym, getShndxTable(SymTab), 821 *StrTableOrErr, SymTab->sh_type == SHT_DYNSYM); 822 return RelSymbol<ELFT>(Sym, SymbolName); 823 } 824 825 template <typename ELFT> 826 ArrayRef<typename ELFT::Word> 827 ELFDumper<ELFT>::getShndxTable(const Elf_Shdr *Symtab) const { 828 if (Symtab) { 829 auto It = ShndxTables.find(Symtab); 830 if (It != ShndxTables.end()) 831 return It->second; 832 } 833 return {}; 834 } 835 836 static std::string maybeDemangle(StringRef Name) { 837 return opts::Demangle ? demangle(std::string(Name)) : Name.str(); 838 } 839 840 template <typename ELFT> 841 std::string ELFDumper<ELFT>::getStaticSymbolName(uint32_t Index) const { 842 auto Warn = [&](Error E) -> std::string { 843 reportUniqueWarning("unable to read the name of symbol with index " + 844 Twine(Index) + ": " + toString(std::move(E))); 845 return "<?>"; 846 }; 847 848 Expected<const typename ELFT::Sym *> SymOrErr = 849 Obj.getSymbol(DotSymtabSec, Index); 850 if (!SymOrErr) 851 return Warn(SymOrErr.takeError()); 852 853 Expected<StringRef> StrTabOrErr = Obj.getStringTableForSymtab(*DotSymtabSec); 854 if (!StrTabOrErr) 855 return Warn(StrTabOrErr.takeError()); 856 857 Expected<StringRef> NameOrErr = (*SymOrErr)->getName(*StrTabOrErr); 858 if (!NameOrErr) 859 return Warn(NameOrErr.takeError()); 860 return maybeDemangle(*NameOrErr); 861 } 862 863 template <typename ELFT> 864 std::string ELFDumper<ELFT>::getFullSymbolName(const Elf_Sym &Symbol, 865 unsigned SymIndex, 866 DataRegion<Elf_Word> ShndxTable, 867 Optional<StringRef> StrTable, 868 bool IsDynamic) const { 869 if (!StrTable) 870 return "<?>"; 871 872 std::string SymbolName; 873 if (Expected<StringRef> NameOrErr = Symbol.getName(*StrTable)) { 874 SymbolName = maybeDemangle(*NameOrErr); 875 } else { 876 reportUniqueWarning(NameOrErr.takeError()); 877 return "<?>"; 878 } 879 880 if (SymbolName.empty() && Symbol.getType() == ELF::STT_SECTION) { 881 Expected<unsigned> SectionIndex = 882 getSymbolSectionIndex(Symbol, SymIndex, ShndxTable); 883 if (!SectionIndex) { 884 reportUniqueWarning(SectionIndex.takeError()); 885 return "<?>"; 886 } 887 Expected<StringRef> NameOrErr = getSymbolSectionName(Symbol, *SectionIndex); 888 if (!NameOrErr) { 889 reportUniqueWarning(NameOrErr.takeError()); 890 return ("<section " + Twine(*SectionIndex) + ">").str(); 891 } 892 return std::string(*NameOrErr); 893 } 894 895 if (!IsDynamic) 896 return SymbolName; 897 898 bool IsDefault; 899 Expected<StringRef> VersionOrErr = getSymbolVersion(Symbol, IsDefault); 900 if (!VersionOrErr) { 901 reportUniqueWarning(VersionOrErr.takeError()); 902 return SymbolName + "@<corrupt>"; 903 } 904 905 if (!VersionOrErr->empty()) { 906 SymbolName += (IsDefault ? "@@" : "@"); 907 SymbolName += *VersionOrErr; 908 } 909 return SymbolName; 910 } 911 912 template <typename ELFT> 913 Expected<unsigned> 914 ELFDumper<ELFT>::getSymbolSectionIndex(const Elf_Sym &Symbol, unsigned SymIndex, 915 DataRegion<Elf_Word> ShndxTable) const { 916 unsigned Ndx = Symbol.st_shndx; 917 if (Ndx == SHN_XINDEX) 918 return object::getExtendedSymbolTableIndex<ELFT>(Symbol, SymIndex, 919 ShndxTable); 920 if (Ndx != SHN_UNDEF && Ndx < SHN_LORESERVE) 921 return Ndx; 922 923 auto CreateErr = [&](const Twine &Name, Optional<unsigned> Offset = None) { 924 std::string Desc; 925 if (Offset) 926 Desc = (Name + "+0x" + Twine::utohexstr(*Offset)).str(); 927 else 928 Desc = Name.str(); 929 return createError( 930 "unable to get section index for symbol with st_shndx = 0x" + 931 Twine::utohexstr(Ndx) + " (" + Desc + ")"); 932 }; 933 934 if (Ndx >= ELF::SHN_LOPROC && Ndx <= ELF::SHN_HIPROC) 935 return CreateErr("SHN_LOPROC", Ndx - ELF::SHN_LOPROC); 936 if (Ndx >= ELF::SHN_LOOS && Ndx <= ELF::SHN_HIOS) 937 return CreateErr("SHN_LOOS", Ndx - ELF::SHN_LOOS); 938 if (Ndx == ELF::SHN_UNDEF) 939 return CreateErr("SHN_UNDEF"); 940 if (Ndx == ELF::SHN_ABS) 941 return CreateErr("SHN_ABS"); 942 if (Ndx == ELF::SHN_COMMON) 943 return CreateErr("SHN_COMMON"); 944 return CreateErr("SHN_LORESERVE", Ndx - SHN_LORESERVE); 945 } 946 947 template <typename ELFT> 948 Expected<StringRef> 949 ELFDumper<ELFT>::getSymbolSectionName(const Elf_Sym &Symbol, 950 unsigned SectionIndex) const { 951 Expected<const Elf_Shdr *> SecOrErr = Obj.getSection(SectionIndex); 952 if (!SecOrErr) 953 return SecOrErr.takeError(); 954 return Obj.getSectionName(**SecOrErr); 955 } 956 957 template <class ELFO> 958 static const typename ELFO::Elf_Shdr * 959 findNotEmptySectionByAddress(const ELFO &Obj, StringRef FileName, 960 uint64_t Addr) { 961 for (const typename ELFO::Elf_Shdr &Shdr : cantFail(Obj.sections())) 962 if (Shdr.sh_addr == Addr && Shdr.sh_size > 0) 963 return &Shdr; 964 return nullptr; 965 } 966 967 static const EnumEntry<unsigned> ElfClass[] = { 968 {"None", "none", ELF::ELFCLASSNONE}, 969 {"32-bit", "ELF32", ELF::ELFCLASS32}, 970 {"64-bit", "ELF64", ELF::ELFCLASS64}, 971 }; 972 973 static const EnumEntry<unsigned> ElfDataEncoding[] = { 974 {"None", "none", ELF::ELFDATANONE}, 975 {"LittleEndian", "2's complement, little endian", ELF::ELFDATA2LSB}, 976 {"BigEndian", "2's complement, big endian", ELF::ELFDATA2MSB}, 977 }; 978 979 static const EnumEntry<unsigned> ElfObjectFileType[] = { 980 {"None", "NONE (none)", ELF::ET_NONE}, 981 {"Relocatable", "REL (Relocatable file)", ELF::ET_REL}, 982 {"Executable", "EXEC (Executable file)", ELF::ET_EXEC}, 983 {"SharedObject", "DYN (Shared object file)", ELF::ET_DYN}, 984 {"Core", "CORE (Core file)", ELF::ET_CORE}, 985 }; 986 987 static const EnumEntry<unsigned> ElfOSABI[] = { 988 {"SystemV", "UNIX - System V", ELF::ELFOSABI_NONE}, 989 {"HPUX", "UNIX - HP-UX", ELF::ELFOSABI_HPUX}, 990 {"NetBSD", "UNIX - NetBSD", ELF::ELFOSABI_NETBSD}, 991 {"GNU/Linux", "UNIX - GNU", ELF::ELFOSABI_LINUX}, 992 {"GNU/Hurd", "GNU/Hurd", ELF::ELFOSABI_HURD}, 993 {"Solaris", "UNIX - Solaris", ELF::ELFOSABI_SOLARIS}, 994 {"AIX", "UNIX - AIX", ELF::ELFOSABI_AIX}, 995 {"IRIX", "UNIX - IRIX", ELF::ELFOSABI_IRIX}, 996 {"FreeBSD", "UNIX - FreeBSD", ELF::ELFOSABI_FREEBSD}, 997 {"TRU64", "UNIX - TRU64", ELF::ELFOSABI_TRU64}, 998 {"Modesto", "Novell - Modesto", ELF::ELFOSABI_MODESTO}, 999 {"OpenBSD", "UNIX - OpenBSD", ELF::ELFOSABI_OPENBSD}, 1000 {"OpenVMS", "VMS - OpenVMS", ELF::ELFOSABI_OPENVMS}, 1001 {"NSK", "HP - Non-Stop Kernel", ELF::ELFOSABI_NSK}, 1002 {"AROS", "AROS", ELF::ELFOSABI_AROS}, 1003 {"FenixOS", "FenixOS", ELF::ELFOSABI_FENIXOS}, 1004 {"CloudABI", "CloudABI", ELF::ELFOSABI_CLOUDABI}, 1005 {"Standalone", "Standalone App", ELF::ELFOSABI_STANDALONE} 1006 }; 1007 1008 static const EnumEntry<unsigned> AMDGPUElfOSABI[] = { 1009 {"AMDGPU_HSA", "AMDGPU - HSA", ELF::ELFOSABI_AMDGPU_HSA}, 1010 {"AMDGPU_PAL", "AMDGPU - PAL", ELF::ELFOSABI_AMDGPU_PAL}, 1011 {"AMDGPU_MESA3D", "AMDGPU - MESA3D", ELF::ELFOSABI_AMDGPU_MESA3D} 1012 }; 1013 1014 static const EnumEntry<unsigned> ARMElfOSABI[] = { 1015 {"ARM", "ARM", ELF::ELFOSABI_ARM} 1016 }; 1017 1018 static const EnumEntry<unsigned> C6000ElfOSABI[] = { 1019 {"C6000_ELFABI", "Bare-metal C6000", ELF::ELFOSABI_C6000_ELFABI}, 1020 {"C6000_LINUX", "Linux C6000", ELF::ELFOSABI_C6000_LINUX} 1021 }; 1022 1023 static const EnumEntry<unsigned> ElfMachineType[] = { 1024 ENUM_ENT(EM_NONE, "None"), 1025 ENUM_ENT(EM_M32, "WE32100"), 1026 ENUM_ENT(EM_SPARC, "Sparc"), 1027 ENUM_ENT(EM_386, "Intel 80386"), 1028 ENUM_ENT(EM_68K, "MC68000"), 1029 ENUM_ENT(EM_88K, "MC88000"), 1030 ENUM_ENT(EM_IAMCU, "EM_IAMCU"), 1031 ENUM_ENT(EM_860, "Intel 80860"), 1032 ENUM_ENT(EM_MIPS, "MIPS R3000"), 1033 ENUM_ENT(EM_S370, "IBM System/370"), 1034 ENUM_ENT(EM_MIPS_RS3_LE, "MIPS R3000 little-endian"), 1035 ENUM_ENT(EM_PARISC, "HPPA"), 1036 ENUM_ENT(EM_VPP500, "Fujitsu VPP500"), 1037 ENUM_ENT(EM_SPARC32PLUS, "Sparc v8+"), 1038 ENUM_ENT(EM_960, "Intel 80960"), 1039 ENUM_ENT(EM_PPC, "PowerPC"), 1040 ENUM_ENT(EM_PPC64, "PowerPC64"), 1041 ENUM_ENT(EM_S390, "IBM S/390"), 1042 ENUM_ENT(EM_SPU, "SPU"), 1043 ENUM_ENT(EM_V800, "NEC V800 series"), 1044 ENUM_ENT(EM_FR20, "Fujistsu FR20"), 1045 ENUM_ENT(EM_RH32, "TRW RH-32"), 1046 ENUM_ENT(EM_RCE, "Motorola RCE"), 1047 ENUM_ENT(EM_ARM, "ARM"), 1048 ENUM_ENT(EM_ALPHA, "EM_ALPHA"), 1049 ENUM_ENT(EM_SH, "Hitachi SH"), 1050 ENUM_ENT(EM_SPARCV9, "Sparc v9"), 1051 ENUM_ENT(EM_TRICORE, "Siemens Tricore"), 1052 ENUM_ENT(EM_ARC, "ARC"), 1053 ENUM_ENT(EM_H8_300, "Hitachi H8/300"), 1054 ENUM_ENT(EM_H8_300H, "Hitachi H8/300H"), 1055 ENUM_ENT(EM_H8S, "Hitachi H8S"), 1056 ENUM_ENT(EM_H8_500, "Hitachi H8/500"), 1057 ENUM_ENT(EM_IA_64, "Intel IA-64"), 1058 ENUM_ENT(EM_MIPS_X, "Stanford MIPS-X"), 1059 ENUM_ENT(EM_COLDFIRE, "Motorola Coldfire"), 1060 ENUM_ENT(EM_68HC12, "Motorola MC68HC12 Microcontroller"), 1061 ENUM_ENT(EM_MMA, "Fujitsu Multimedia Accelerator"), 1062 ENUM_ENT(EM_PCP, "Siemens PCP"), 1063 ENUM_ENT(EM_NCPU, "Sony nCPU embedded RISC processor"), 1064 ENUM_ENT(EM_NDR1, "Denso NDR1 microprocesspr"), 1065 ENUM_ENT(EM_STARCORE, "Motorola Star*Core processor"), 1066 ENUM_ENT(EM_ME16, "Toyota ME16 processor"), 1067 ENUM_ENT(EM_ST100, "STMicroelectronics ST100 processor"), 1068 ENUM_ENT(EM_TINYJ, "Advanced Logic Corp. TinyJ embedded processor"), 1069 ENUM_ENT(EM_X86_64, "Advanced Micro Devices X86-64"), 1070 ENUM_ENT(EM_PDSP, "Sony DSP processor"), 1071 ENUM_ENT(EM_PDP10, "Digital Equipment Corp. PDP-10"), 1072 ENUM_ENT(EM_PDP11, "Digital Equipment Corp. PDP-11"), 1073 ENUM_ENT(EM_FX66, "Siemens FX66 microcontroller"), 1074 ENUM_ENT(EM_ST9PLUS, "STMicroelectronics ST9+ 8/16 bit microcontroller"), 1075 ENUM_ENT(EM_ST7, "STMicroelectronics ST7 8-bit microcontroller"), 1076 ENUM_ENT(EM_68HC16, "Motorola MC68HC16 Microcontroller"), 1077 ENUM_ENT(EM_68HC11, "Motorola MC68HC11 Microcontroller"), 1078 ENUM_ENT(EM_68HC08, "Motorola MC68HC08 Microcontroller"), 1079 ENUM_ENT(EM_68HC05, "Motorola MC68HC05 Microcontroller"), 1080 ENUM_ENT(EM_SVX, "Silicon Graphics SVx"), 1081 ENUM_ENT(EM_ST19, "STMicroelectronics ST19 8-bit microcontroller"), 1082 ENUM_ENT(EM_VAX, "Digital VAX"), 1083 ENUM_ENT(EM_CRIS, "Axis Communications 32-bit embedded processor"), 1084 ENUM_ENT(EM_JAVELIN, "Infineon Technologies 32-bit embedded cpu"), 1085 ENUM_ENT(EM_FIREPATH, "Element 14 64-bit DSP processor"), 1086 ENUM_ENT(EM_ZSP, "LSI Logic's 16-bit DSP processor"), 1087 ENUM_ENT(EM_MMIX, "Donald Knuth's educational 64-bit processor"), 1088 ENUM_ENT(EM_HUANY, "Harvard Universitys's machine-independent object format"), 1089 ENUM_ENT(EM_PRISM, "Vitesse Prism"), 1090 ENUM_ENT(EM_AVR, "Atmel AVR 8-bit microcontroller"), 1091 ENUM_ENT(EM_FR30, "Fujitsu FR30"), 1092 ENUM_ENT(EM_D10V, "Mitsubishi D10V"), 1093 ENUM_ENT(EM_D30V, "Mitsubishi D30V"), 1094 ENUM_ENT(EM_V850, "NEC v850"), 1095 ENUM_ENT(EM_M32R, "Renesas M32R (formerly Mitsubishi M32r)"), 1096 ENUM_ENT(EM_MN10300, "Matsushita MN10300"), 1097 ENUM_ENT(EM_MN10200, "Matsushita MN10200"), 1098 ENUM_ENT(EM_PJ, "picoJava"), 1099 ENUM_ENT(EM_OPENRISC, "OpenRISC 32-bit embedded processor"), 1100 ENUM_ENT(EM_ARC_COMPACT, "EM_ARC_COMPACT"), 1101 ENUM_ENT(EM_XTENSA, "Tensilica Xtensa Processor"), 1102 ENUM_ENT(EM_VIDEOCORE, "Alphamosaic VideoCore processor"), 1103 ENUM_ENT(EM_TMM_GPP, "Thompson Multimedia General Purpose Processor"), 1104 ENUM_ENT(EM_NS32K, "National Semiconductor 32000 series"), 1105 ENUM_ENT(EM_TPC, "Tenor Network TPC processor"), 1106 ENUM_ENT(EM_SNP1K, "EM_SNP1K"), 1107 ENUM_ENT(EM_ST200, "STMicroelectronics ST200 microcontroller"), 1108 ENUM_ENT(EM_IP2K, "Ubicom IP2xxx 8-bit microcontrollers"), 1109 ENUM_ENT(EM_MAX, "MAX Processor"), 1110 ENUM_ENT(EM_CR, "National Semiconductor CompactRISC"), 1111 ENUM_ENT(EM_F2MC16, "Fujitsu F2MC16"), 1112 ENUM_ENT(EM_MSP430, "Texas Instruments msp430 microcontroller"), 1113 ENUM_ENT(EM_BLACKFIN, "Analog Devices Blackfin"), 1114 ENUM_ENT(EM_SE_C33, "S1C33 Family of Seiko Epson processors"), 1115 ENUM_ENT(EM_SEP, "Sharp embedded microprocessor"), 1116 ENUM_ENT(EM_ARCA, "Arca RISC microprocessor"), 1117 ENUM_ENT(EM_UNICORE, "Unicore"), 1118 ENUM_ENT(EM_EXCESS, "eXcess 16/32/64-bit configurable embedded CPU"), 1119 ENUM_ENT(EM_DXP, "Icera Semiconductor Inc. Deep Execution Processor"), 1120 ENUM_ENT(EM_ALTERA_NIOS2, "Altera Nios"), 1121 ENUM_ENT(EM_CRX, "National Semiconductor CRX microprocessor"), 1122 ENUM_ENT(EM_XGATE, "Motorola XGATE embedded processor"), 1123 ENUM_ENT(EM_C166, "Infineon Technologies xc16x"), 1124 ENUM_ENT(EM_M16C, "Renesas M16C"), 1125 ENUM_ENT(EM_DSPIC30F, "Microchip Technology dsPIC30F Digital Signal Controller"), 1126 ENUM_ENT(EM_CE, "Freescale Communication Engine RISC core"), 1127 ENUM_ENT(EM_M32C, "Renesas M32C"), 1128 ENUM_ENT(EM_TSK3000, "Altium TSK3000 core"), 1129 ENUM_ENT(EM_RS08, "Freescale RS08 embedded processor"), 1130 ENUM_ENT(EM_SHARC, "EM_SHARC"), 1131 ENUM_ENT(EM_ECOG2, "Cyan Technology eCOG2 microprocessor"), 1132 ENUM_ENT(EM_SCORE7, "SUNPLUS S+Core"), 1133 ENUM_ENT(EM_DSP24, "New Japan Radio (NJR) 24-bit DSP Processor"), 1134 ENUM_ENT(EM_VIDEOCORE3, "Broadcom VideoCore III processor"), 1135 ENUM_ENT(EM_LATTICEMICO32, "Lattice Mico32"), 1136 ENUM_ENT(EM_SE_C17, "Seiko Epson C17 family"), 1137 ENUM_ENT(EM_TI_C6000, "Texas Instruments TMS320C6000 DSP family"), 1138 ENUM_ENT(EM_TI_C2000, "Texas Instruments TMS320C2000 DSP family"), 1139 ENUM_ENT(EM_TI_C5500, "Texas Instruments TMS320C55x DSP family"), 1140 ENUM_ENT(EM_MMDSP_PLUS, "STMicroelectronics 64bit VLIW Data Signal Processor"), 1141 ENUM_ENT(EM_CYPRESS_M8C, "Cypress M8C microprocessor"), 1142 ENUM_ENT(EM_R32C, "Renesas R32C series microprocessors"), 1143 ENUM_ENT(EM_TRIMEDIA, "NXP Semiconductors TriMedia architecture family"), 1144 ENUM_ENT(EM_HEXAGON, "Qualcomm Hexagon"), 1145 ENUM_ENT(EM_8051, "Intel 8051 and variants"), 1146 ENUM_ENT(EM_STXP7X, "STMicroelectronics STxP7x family"), 1147 ENUM_ENT(EM_NDS32, "Andes Technology compact code size embedded RISC processor family"), 1148 ENUM_ENT(EM_ECOG1, "Cyan Technology eCOG1 microprocessor"), 1149 // FIXME: Following EM_ECOG1X definitions is dead code since EM_ECOG1X has 1150 // an identical number to EM_ECOG1. 1151 ENUM_ENT(EM_ECOG1X, "Cyan Technology eCOG1X family"), 1152 ENUM_ENT(EM_MAXQ30, "Dallas Semiconductor MAXQ30 Core microcontrollers"), 1153 ENUM_ENT(EM_XIMO16, "New Japan Radio (NJR) 16-bit DSP Processor"), 1154 ENUM_ENT(EM_MANIK, "M2000 Reconfigurable RISC Microprocessor"), 1155 ENUM_ENT(EM_CRAYNV2, "Cray Inc. NV2 vector architecture"), 1156 ENUM_ENT(EM_RX, "Renesas RX"), 1157 ENUM_ENT(EM_METAG, "Imagination Technologies Meta processor architecture"), 1158 ENUM_ENT(EM_MCST_ELBRUS, "MCST Elbrus general purpose hardware architecture"), 1159 ENUM_ENT(EM_ECOG16, "Cyan Technology eCOG16 family"), 1160 ENUM_ENT(EM_CR16, "National Semiconductor CompactRISC 16-bit processor"), 1161 ENUM_ENT(EM_ETPU, "Freescale Extended Time Processing Unit"), 1162 ENUM_ENT(EM_SLE9X, "Infineon Technologies SLE9X core"), 1163 ENUM_ENT(EM_L10M, "EM_L10M"), 1164 ENUM_ENT(EM_K10M, "EM_K10M"), 1165 ENUM_ENT(EM_AARCH64, "AArch64"), 1166 ENUM_ENT(EM_AVR32, "Atmel Corporation 32-bit microprocessor family"), 1167 ENUM_ENT(EM_STM8, "STMicroeletronics STM8 8-bit microcontroller"), 1168 ENUM_ENT(EM_TILE64, "Tilera TILE64 multicore architecture family"), 1169 ENUM_ENT(EM_TILEPRO, "Tilera TILEPro multicore architecture family"), 1170 ENUM_ENT(EM_MICROBLAZE, "Xilinx MicroBlaze 32-bit RISC soft processor core"), 1171 ENUM_ENT(EM_CUDA, "NVIDIA CUDA architecture"), 1172 ENUM_ENT(EM_TILEGX, "Tilera TILE-Gx multicore architecture family"), 1173 ENUM_ENT(EM_CLOUDSHIELD, "EM_CLOUDSHIELD"), 1174 ENUM_ENT(EM_COREA_1ST, "EM_COREA_1ST"), 1175 ENUM_ENT(EM_COREA_2ND, "EM_COREA_2ND"), 1176 ENUM_ENT(EM_ARC_COMPACT2, "EM_ARC_COMPACT2"), 1177 ENUM_ENT(EM_OPEN8, "EM_OPEN8"), 1178 ENUM_ENT(EM_RL78, "Renesas RL78"), 1179 ENUM_ENT(EM_VIDEOCORE5, "Broadcom VideoCore V processor"), 1180 ENUM_ENT(EM_78KOR, "EM_78KOR"), 1181 ENUM_ENT(EM_56800EX, "EM_56800EX"), 1182 ENUM_ENT(EM_AMDGPU, "EM_AMDGPU"), 1183 ENUM_ENT(EM_RISCV, "RISC-V"), 1184 ENUM_ENT(EM_LANAI, "EM_LANAI"), 1185 ENUM_ENT(EM_BPF, "EM_BPF"), 1186 ENUM_ENT(EM_VE, "NEC SX-Aurora Vector Engine"), 1187 }; 1188 1189 static const EnumEntry<unsigned> ElfSymbolBindings[] = { 1190 {"Local", "LOCAL", ELF::STB_LOCAL}, 1191 {"Global", "GLOBAL", ELF::STB_GLOBAL}, 1192 {"Weak", "WEAK", ELF::STB_WEAK}, 1193 {"Unique", "UNIQUE", ELF::STB_GNU_UNIQUE}}; 1194 1195 static const EnumEntry<unsigned> ElfSymbolVisibilities[] = { 1196 {"DEFAULT", "DEFAULT", ELF::STV_DEFAULT}, 1197 {"INTERNAL", "INTERNAL", ELF::STV_INTERNAL}, 1198 {"HIDDEN", "HIDDEN", ELF::STV_HIDDEN}, 1199 {"PROTECTED", "PROTECTED", ELF::STV_PROTECTED}}; 1200 1201 static const EnumEntry<unsigned> AMDGPUSymbolTypes[] = { 1202 { "AMDGPU_HSA_KERNEL", ELF::STT_AMDGPU_HSA_KERNEL } 1203 }; 1204 1205 static const char *getGroupType(uint32_t Flag) { 1206 if (Flag & ELF::GRP_COMDAT) 1207 return "COMDAT"; 1208 else 1209 return "(unknown)"; 1210 } 1211 1212 static const EnumEntry<unsigned> ElfSectionFlags[] = { 1213 ENUM_ENT(SHF_WRITE, "W"), 1214 ENUM_ENT(SHF_ALLOC, "A"), 1215 ENUM_ENT(SHF_EXECINSTR, "X"), 1216 ENUM_ENT(SHF_MERGE, "M"), 1217 ENUM_ENT(SHF_STRINGS, "S"), 1218 ENUM_ENT(SHF_INFO_LINK, "I"), 1219 ENUM_ENT(SHF_LINK_ORDER, "L"), 1220 ENUM_ENT(SHF_OS_NONCONFORMING, "O"), 1221 ENUM_ENT(SHF_GROUP, "G"), 1222 ENUM_ENT(SHF_TLS, "T"), 1223 ENUM_ENT(SHF_COMPRESSED, "C"), 1224 ENUM_ENT(SHF_GNU_RETAIN, "R"), 1225 ENUM_ENT(SHF_EXCLUDE, "E"), 1226 }; 1227 1228 static const EnumEntry<unsigned> ElfXCoreSectionFlags[] = { 1229 ENUM_ENT(XCORE_SHF_CP_SECTION, ""), 1230 ENUM_ENT(XCORE_SHF_DP_SECTION, "") 1231 }; 1232 1233 static const EnumEntry<unsigned> ElfARMSectionFlags[] = { 1234 ENUM_ENT(SHF_ARM_PURECODE, "y") 1235 }; 1236 1237 static const EnumEntry<unsigned> ElfHexagonSectionFlags[] = { 1238 ENUM_ENT(SHF_HEX_GPREL, "") 1239 }; 1240 1241 static const EnumEntry<unsigned> ElfMipsSectionFlags[] = { 1242 ENUM_ENT(SHF_MIPS_NODUPES, ""), 1243 ENUM_ENT(SHF_MIPS_NAMES, ""), 1244 ENUM_ENT(SHF_MIPS_LOCAL, ""), 1245 ENUM_ENT(SHF_MIPS_NOSTRIP, ""), 1246 ENUM_ENT(SHF_MIPS_GPREL, ""), 1247 ENUM_ENT(SHF_MIPS_MERGE, ""), 1248 ENUM_ENT(SHF_MIPS_ADDR, ""), 1249 ENUM_ENT(SHF_MIPS_STRING, "") 1250 }; 1251 1252 static const EnumEntry<unsigned> ElfX86_64SectionFlags[] = { 1253 ENUM_ENT(SHF_X86_64_LARGE, "l") 1254 }; 1255 1256 static std::vector<EnumEntry<unsigned>> 1257 getSectionFlagsForTarget(unsigned EMachine) { 1258 std::vector<EnumEntry<unsigned>> Ret(std::begin(ElfSectionFlags), 1259 std::end(ElfSectionFlags)); 1260 switch (EMachine) { 1261 case EM_ARM: 1262 Ret.insert(Ret.end(), std::begin(ElfARMSectionFlags), 1263 std::end(ElfARMSectionFlags)); 1264 break; 1265 case EM_HEXAGON: 1266 Ret.insert(Ret.end(), std::begin(ElfHexagonSectionFlags), 1267 std::end(ElfHexagonSectionFlags)); 1268 break; 1269 case EM_MIPS: 1270 Ret.insert(Ret.end(), std::begin(ElfMipsSectionFlags), 1271 std::end(ElfMipsSectionFlags)); 1272 break; 1273 case EM_X86_64: 1274 Ret.insert(Ret.end(), std::begin(ElfX86_64SectionFlags), 1275 std::end(ElfX86_64SectionFlags)); 1276 break; 1277 case EM_XCORE: 1278 Ret.insert(Ret.end(), std::begin(ElfXCoreSectionFlags), 1279 std::end(ElfXCoreSectionFlags)); 1280 break; 1281 default: 1282 break; 1283 } 1284 return Ret; 1285 } 1286 1287 static std::string getGNUFlags(unsigned EMachine, uint64_t Flags) { 1288 // Here we are trying to build the flags string in the same way as GNU does. 1289 // It is not that straightforward. Imagine we have sh_flags == 0x90000000. 1290 // SHF_EXCLUDE ("E") has a value of 0x80000000 and SHF_MASKPROC is 0xf0000000. 1291 // GNU readelf will not print "E" or "Ep" in this case, but will print just 1292 // "p". It only will print "E" when no other processor flag is set. 1293 std::string Str; 1294 bool HasUnknownFlag = false; 1295 bool HasOSFlag = false; 1296 bool HasProcFlag = false; 1297 std::vector<EnumEntry<unsigned>> FlagsList = 1298 getSectionFlagsForTarget(EMachine); 1299 while (Flags) { 1300 // Take the least significant bit as a flag. 1301 uint64_t Flag = Flags & -Flags; 1302 Flags -= Flag; 1303 1304 // Find the flag in the known flags list. 1305 auto I = llvm::find_if(FlagsList, [=](const EnumEntry<unsigned> &E) { 1306 // Flags with empty names are not printed in GNU style output. 1307 return E.Value == Flag && !E.AltName.empty(); 1308 }); 1309 if (I != FlagsList.end()) { 1310 Str += I->AltName; 1311 continue; 1312 } 1313 1314 // If we did not find a matching regular flag, then we deal with an OS 1315 // specific flag, processor specific flag or an unknown flag. 1316 if (Flag & ELF::SHF_MASKOS) { 1317 HasOSFlag = true; 1318 Flags &= ~ELF::SHF_MASKOS; 1319 } else if (Flag & ELF::SHF_MASKPROC) { 1320 HasProcFlag = true; 1321 // Mask off all the processor-specific bits. This removes the SHF_EXCLUDE 1322 // bit if set so that it doesn't also get printed. 1323 Flags &= ~ELF::SHF_MASKPROC; 1324 } else { 1325 HasUnknownFlag = true; 1326 } 1327 } 1328 1329 // "o", "p" and "x" are printed last. 1330 if (HasOSFlag) 1331 Str += "o"; 1332 if (HasProcFlag) 1333 Str += "p"; 1334 if (HasUnknownFlag) 1335 Str += "x"; 1336 return Str; 1337 } 1338 1339 static StringRef segmentTypeToString(unsigned Arch, unsigned Type) { 1340 // Check potentially overlapped processor-specific program header type. 1341 switch (Arch) { 1342 case ELF::EM_ARM: 1343 switch (Type) { LLVM_READOBJ_ENUM_CASE(ELF, PT_ARM_EXIDX); } 1344 break; 1345 case ELF::EM_MIPS: 1346 case ELF::EM_MIPS_RS3_LE: 1347 switch (Type) { 1348 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_REGINFO); 1349 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_RTPROC); 1350 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_OPTIONS); 1351 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_ABIFLAGS); 1352 } 1353 break; 1354 } 1355 1356 switch (Type) { 1357 LLVM_READOBJ_ENUM_CASE(ELF, PT_NULL); 1358 LLVM_READOBJ_ENUM_CASE(ELF, PT_LOAD); 1359 LLVM_READOBJ_ENUM_CASE(ELF, PT_DYNAMIC); 1360 LLVM_READOBJ_ENUM_CASE(ELF, PT_INTERP); 1361 LLVM_READOBJ_ENUM_CASE(ELF, PT_NOTE); 1362 LLVM_READOBJ_ENUM_CASE(ELF, PT_SHLIB); 1363 LLVM_READOBJ_ENUM_CASE(ELF, PT_PHDR); 1364 LLVM_READOBJ_ENUM_CASE(ELF, PT_TLS); 1365 1366 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_EH_FRAME); 1367 LLVM_READOBJ_ENUM_CASE(ELF, PT_SUNW_UNWIND); 1368 1369 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_STACK); 1370 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_RELRO); 1371 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_PROPERTY); 1372 1373 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_RANDOMIZE); 1374 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_WXNEEDED); 1375 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_BOOTDATA); 1376 default: 1377 return ""; 1378 } 1379 } 1380 1381 static std::string getGNUPtType(unsigned Arch, unsigned Type) { 1382 StringRef Seg = segmentTypeToString(Arch, Type); 1383 if (Seg.empty()) 1384 return std::string("<unknown>: ") + to_string(format_hex(Type, 1)); 1385 1386 // E.g. "PT_ARM_EXIDX" -> "EXIDX". 1387 if (Seg.startswith("PT_ARM_")) 1388 return Seg.drop_front(7).str(); 1389 1390 // E.g. "PT_MIPS_REGINFO" -> "REGINFO". 1391 if (Seg.startswith("PT_MIPS_")) 1392 return Seg.drop_front(8).str(); 1393 1394 // E.g. "PT_LOAD" -> "LOAD". 1395 assert(Seg.startswith("PT_")); 1396 return Seg.drop_front(3).str(); 1397 } 1398 1399 static const EnumEntry<unsigned> ElfSegmentFlags[] = { 1400 LLVM_READOBJ_ENUM_ENT(ELF, PF_X), 1401 LLVM_READOBJ_ENUM_ENT(ELF, PF_W), 1402 LLVM_READOBJ_ENUM_ENT(ELF, PF_R) 1403 }; 1404 1405 static const EnumEntry<unsigned> ElfHeaderMipsFlags[] = { 1406 ENUM_ENT(EF_MIPS_NOREORDER, "noreorder"), 1407 ENUM_ENT(EF_MIPS_PIC, "pic"), 1408 ENUM_ENT(EF_MIPS_CPIC, "cpic"), 1409 ENUM_ENT(EF_MIPS_ABI2, "abi2"), 1410 ENUM_ENT(EF_MIPS_32BITMODE, "32bitmode"), 1411 ENUM_ENT(EF_MIPS_FP64, "fp64"), 1412 ENUM_ENT(EF_MIPS_NAN2008, "nan2008"), 1413 ENUM_ENT(EF_MIPS_ABI_O32, "o32"), 1414 ENUM_ENT(EF_MIPS_ABI_O64, "o64"), 1415 ENUM_ENT(EF_MIPS_ABI_EABI32, "eabi32"), 1416 ENUM_ENT(EF_MIPS_ABI_EABI64, "eabi64"), 1417 ENUM_ENT(EF_MIPS_MACH_3900, "3900"), 1418 ENUM_ENT(EF_MIPS_MACH_4010, "4010"), 1419 ENUM_ENT(EF_MIPS_MACH_4100, "4100"), 1420 ENUM_ENT(EF_MIPS_MACH_4650, "4650"), 1421 ENUM_ENT(EF_MIPS_MACH_4120, "4120"), 1422 ENUM_ENT(EF_MIPS_MACH_4111, "4111"), 1423 ENUM_ENT(EF_MIPS_MACH_SB1, "sb1"), 1424 ENUM_ENT(EF_MIPS_MACH_OCTEON, "octeon"), 1425 ENUM_ENT(EF_MIPS_MACH_XLR, "xlr"), 1426 ENUM_ENT(EF_MIPS_MACH_OCTEON2, "octeon2"), 1427 ENUM_ENT(EF_MIPS_MACH_OCTEON3, "octeon3"), 1428 ENUM_ENT(EF_MIPS_MACH_5400, "5400"), 1429 ENUM_ENT(EF_MIPS_MACH_5900, "5900"), 1430 ENUM_ENT(EF_MIPS_MACH_5500, "5500"), 1431 ENUM_ENT(EF_MIPS_MACH_9000, "9000"), 1432 ENUM_ENT(EF_MIPS_MACH_LS2E, "loongson-2e"), 1433 ENUM_ENT(EF_MIPS_MACH_LS2F, "loongson-2f"), 1434 ENUM_ENT(EF_MIPS_MACH_LS3A, "loongson-3a"), 1435 ENUM_ENT(EF_MIPS_MICROMIPS, "micromips"), 1436 ENUM_ENT(EF_MIPS_ARCH_ASE_M16, "mips16"), 1437 ENUM_ENT(EF_MIPS_ARCH_ASE_MDMX, "mdmx"), 1438 ENUM_ENT(EF_MIPS_ARCH_1, "mips1"), 1439 ENUM_ENT(EF_MIPS_ARCH_2, "mips2"), 1440 ENUM_ENT(EF_MIPS_ARCH_3, "mips3"), 1441 ENUM_ENT(EF_MIPS_ARCH_4, "mips4"), 1442 ENUM_ENT(EF_MIPS_ARCH_5, "mips5"), 1443 ENUM_ENT(EF_MIPS_ARCH_32, "mips32"), 1444 ENUM_ENT(EF_MIPS_ARCH_64, "mips64"), 1445 ENUM_ENT(EF_MIPS_ARCH_32R2, "mips32r2"), 1446 ENUM_ENT(EF_MIPS_ARCH_64R2, "mips64r2"), 1447 ENUM_ENT(EF_MIPS_ARCH_32R6, "mips32r6"), 1448 ENUM_ENT(EF_MIPS_ARCH_64R6, "mips64r6") 1449 }; 1450 1451 static const EnumEntry<unsigned> ElfHeaderAMDGPUFlagsABIVersion3[] = { 1452 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_NONE), 1453 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R600), 1454 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R630), 1455 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RS880), 1456 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV670), 1457 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV710), 1458 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV730), 1459 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV770), 1460 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CEDAR), 1461 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CYPRESS), 1462 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_JUNIPER), 1463 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_REDWOOD), 1464 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_SUMO), 1465 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_BARTS), 1466 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAICOS), 1467 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAYMAN), 1468 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_TURKS), 1469 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX600), 1470 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX601), 1471 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX602), 1472 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX700), 1473 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX701), 1474 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX702), 1475 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX703), 1476 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX704), 1477 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX705), 1478 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX801), 1479 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX802), 1480 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX803), 1481 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX805), 1482 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX810), 1483 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX900), 1484 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX902), 1485 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX904), 1486 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX906), 1487 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX908), 1488 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX909), 1489 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX90A), 1490 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX90C), 1491 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1010), 1492 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1011), 1493 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1012), 1494 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1013), 1495 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1030), 1496 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1031), 1497 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1032), 1498 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1033), 1499 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1034), 1500 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1035), 1501 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_XNACK_V3), 1502 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_SRAMECC_V3) 1503 }; 1504 1505 static const EnumEntry<unsigned> ElfHeaderAMDGPUFlagsABIVersion4[] = { 1506 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_NONE), 1507 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R600), 1508 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R630), 1509 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RS880), 1510 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV670), 1511 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV710), 1512 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV730), 1513 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV770), 1514 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CEDAR), 1515 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CYPRESS), 1516 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_JUNIPER), 1517 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_REDWOOD), 1518 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_SUMO), 1519 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_BARTS), 1520 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAICOS), 1521 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAYMAN), 1522 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_TURKS), 1523 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX600), 1524 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX601), 1525 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX602), 1526 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX700), 1527 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX701), 1528 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX702), 1529 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX703), 1530 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX704), 1531 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX705), 1532 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX801), 1533 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX802), 1534 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX803), 1535 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX805), 1536 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX810), 1537 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX900), 1538 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX902), 1539 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX904), 1540 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX906), 1541 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX908), 1542 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX909), 1543 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX90A), 1544 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX90C), 1545 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1010), 1546 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1011), 1547 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1012), 1548 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1013), 1549 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1030), 1550 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1031), 1551 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1032), 1552 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1033), 1553 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1034), 1554 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1035), 1555 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_XNACK_ANY_V4), 1556 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_XNACK_OFF_V4), 1557 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_XNACK_ON_V4), 1558 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_SRAMECC_ANY_V4), 1559 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_SRAMECC_OFF_V4), 1560 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_SRAMECC_ON_V4) 1561 }; 1562 1563 static const EnumEntry<unsigned> ElfHeaderRISCVFlags[] = { 1564 ENUM_ENT(EF_RISCV_RVC, "RVC"), 1565 ENUM_ENT(EF_RISCV_FLOAT_ABI_SINGLE, "single-float ABI"), 1566 ENUM_ENT(EF_RISCV_FLOAT_ABI_DOUBLE, "double-float ABI"), 1567 ENUM_ENT(EF_RISCV_FLOAT_ABI_QUAD, "quad-float ABI"), 1568 ENUM_ENT(EF_RISCV_RVE, "RVE") 1569 }; 1570 1571 static const EnumEntry<unsigned> ElfHeaderAVRFlags[] = { 1572 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR1), 1573 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR2), 1574 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR25), 1575 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR3), 1576 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR31), 1577 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR35), 1578 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR4), 1579 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR5), 1580 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR51), 1581 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVR6), 1582 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_AVRTINY), 1583 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_XMEGA1), 1584 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_XMEGA2), 1585 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_XMEGA3), 1586 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_XMEGA4), 1587 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_XMEGA5), 1588 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_XMEGA6), 1589 LLVM_READOBJ_ENUM_ENT(ELF, EF_AVR_ARCH_XMEGA7), 1590 ENUM_ENT(EF_AVR_LINKRELAX_PREPARED, "relaxable"), 1591 }; 1592 1593 1594 static const EnumEntry<unsigned> ElfSymOtherFlags[] = { 1595 LLVM_READOBJ_ENUM_ENT(ELF, STV_INTERNAL), 1596 LLVM_READOBJ_ENUM_ENT(ELF, STV_HIDDEN), 1597 LLVM_READOBJ_ENUM_ENT(ELF, STV_PROTECTED) 1598 }; 1599 1600 static const EnumEntry<unsigned> ElfMipsSymOtherFlags[] = { 1601 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1602 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1603 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PIC), 1604 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MICROMIPS) 1605 }; 1606 1607 static const EnumEntry<unsigned> ElfAArch64SymOtherFlags[] = { 1608 LLVM_READOBJ_ENUM_ENT(ELF, STO_AARCH64_VARIANT_PCS) 1609 }; 1610 1611 static const EnumEntry<unsigned> ElfMips16SymOtherFlags[] = { 1612 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1613 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1614 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MIPS16) 1615 }; 1616 1617 static const char *getElfMipsOptionsOdkType(unsigned Odk) { 1618 switch (Odk) { 1619 LLVM_READOBJ_ENUM_CASE(ELF, ODK_NULL); 1620 LLVM_READOBJ_ENUM_CASE(ELF, ODK_REGINFO); 1621 LLVM_READOBJ_ENUM_CASE(ELF, ODK_EXCEPTIONS); 1622 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAD); 1623 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWPATCH); 1624 LLVM_READOBJ_ENUM_CASE(ELF, ODK_FILL); 1625 LLVM_READOBJ_ENUM_CASE(ELF, ODK_TAGS); 1626 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWAND); 1627 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWOR); 1628 LLVM_READOBJ_ENUM_CASE(ELF, ODK_GP_GROUP); 1629 LLVM_READOBJ_ENUM_CASE(ELF, ODK_IDENT); 1630 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAGESIZE); 1631 default: 1632 return "Unknown"; 1633 } 1634 } 1635 1636 template <typename ELFT> 1637 std::pair<const typename ELFT::Phdr *, const typename ELFT::Shdr *> 1638 ELFDumper<ELFT>::findDynamic() { 1639 // Try to locate the PT_DYNAMIC header. 1640 const Elf_Phdr *DynamicPhdr = nullptr; 1641 if (Expected<ArrayRef<Elf_Phdr>> PhdrsOrErr = Obj.program_headers()) { 1642 for (const Elf_Phdr &Phdr : *PhdrsOrErr) { 1643 if (Phdr.p_type != ELF::PT_DYNAMIC) 1644 continue; 1645 DynamicPhdr = &Phdr; 1646 break; 1647 } 1648 } else { 1649 reportUniqueWarning( 1650 "unable to read program headers to locate the PT_DYNAMIC segment: " + 1651 toString(PhdrsOrErr.takeError())); 1652 } 1653 1654 // Try to locate the .dynamic section in the sections header table. 1655 const Elf_Shdr *DynamicSec = nullptr; 1656 for (const Elf_Shdr &Sec : cantFail(Obj.sections())) { 1657 if (Sec.sh_type != ELF::SHT_DYNAMIC) 1658 continue; 1659 DynamicSec = &Sec; 1660 break; 1661 } 1662 1663 if (DynamicPhdr && ((DynamicPhdr->p_offset + DynamicPhdr->p_filesz > 1664 ObjF.getMemoryBufferRef().getBufferSize()) || 1665 (DynamicPhdr->p_offset + DynamicPhdr->p_filesz < 1666 DynamicPhdr->p_offset))) { 1667 reportUniqueWarning( 1668 "PT_DYNAMIC segment offset (0x" + 1669 Twine::utohexstr(DynamicPhdr->p_offset) + ") + file size (0x" + 1670 Twine::utohexstr(DynamicPhdr->p_filesz) + 1671 ") exceeds the size of the file (0x" + 1672 Twine::utohexstr(ObjF.getMemoryBufferRef().getBufferSize()) + ")"); 1673 // Don't use the broken dynamic header. 1674 DynamicPhdr = nullptr; 1675 } 1676 1677 if (DynamicPhdr && DynamicSec) { 1678 if (DynamicSec->sh_addr + DynamicSec->sh_size > 1679 DynamicPhdr->p_vaddr + DynamicPhdr->p_memsz || 1680 DynamicSec->sh_addr < DynamicPhdr->p_vaddr) 1681 reportUniqueWarning(describe(*DynamicSec) + 1682 " is not contained within the " 1683 "PT_DYNAMIC segment"); 1684 1685 if (DynamicSec->sh_addr != DynamicPhdr->p_vaddr) 1686 reportUniqueWarning(describe(*DynamicSec) + " is not at the start of " 1687 "PT_DYNAMIC segment"); 1688 } 1689 1690 return std::make_pair(DynamicPhdr, DynamicSec); 1691 } 1692 1693 template <typename ELFT> 1694 void ELFDumper<ELFT>::loadDynamicTable() { 1695 const Elf_Phdr *DynamicPhdr; 1696 const Elf_Shdr *DynamicSec; 1697 std::tie(DynamicPhdr, DynamicSec) = findDynamic(); 1698 if (!DynamicPhdr && !DynamicSec) 1699 return; 1700 1701 DynRegionInfo FromPhdr(ObjF, *this); 1702 bool IsPhdrTableValid = false; 1703 if (DynamicPhdr) { 1704 // Use cantFail(), because p_offset/p_filesz fields of a PT_DYNAMIC are 1705 // validated in findDynamic() and so createDRI() is not expected to fail. 1706 FromPhdr = cantFail(createDRI(DynamicPhdr->p_offset, DynamicPhdr->p_filesz, 1707 sizeof(Elf_Dyn))); 1708 FromPhdr.SizePrintName = "PT_DYNAMIC size"; 1709 FromPhdr.EntSizePrintName = ""; 1710 IsPhdrTableValid = !FromPhdr.template getAsArrayRef<Elf_Dyn>().empty(); 1711 } 1712 1713 // Locate the dynamic table described in a section header. 1714 // Ignore sh_entsize and use the expected value for entry size explicitly. 1715 // This allows us to dump dynamic sections with a broken sh_entsize 1716 // field. 1717 DynRegionInfo FromSec(ObjF, *this); 1718 bool IsSecTableValid = false; 1719 if (DynamicSec) { 1720 Expected<DynRegionInfo> RegOrErr = 1721 createDRI(DynamicSec->sh_offset, DynamicSec->sh_size, sizeof(Elf_Dyn)); 1722 if (RegOrErr) { 1723 FromSec = *RegOrErr; 1724 FromSec.Context = describe(*DynamicSec); 1725 FromSec.EntSizePrintName = ""; 1726 IsSecTableValid = !FromSec.template getAsArrayRef<Elf_Dyn>().empty(); 1727 } else { 1728 reportUniqueWarning("unable to read the dynamic table from " + 1729 describe(*DynamicSec) + ": " + 1730 toString(RegOrErr.takeError())); 1731 } 1732 } 1733 1734 // When we only have information from one of the SHT_DYNAMIC section header or 1735 // PT_DYNAMIC program header, just use that. 1736 if (!DynamicPhdr || !DynamicSec) { 1737 if ((DynamicPhdr && IsPhdrTableValid) || (DynamicSec && IsSecTableValid)) { 1738 DynamicTable = DynamicPhdr ? FromPhdr : FromSec; 1739 parseDynamicTable(); 1740 } else { 1741 reportUniqueWarning("no valid dynamic table was found"); 1742 } 1743 return; 1744 } 1745 1746 // At this point we have tables found from the section header and from the 1747 // dynamic segment. Usually they match, but we have to do sanity checks to 1748 // verify that. 1749 1750 if (FromPhdr.Addr != FromSec.Addr) 1751 reportUniqueWarning("SHT_DYNAMIC section header and PT_DYNAMIC " 1752 "program header disagree about " 1753 "the location of the dynamic table"); 1754 1755 if (!IsPhdrTableValid && !IsSecTableValid) { 1756 reportUniqueWarning("no valid dynamic table was found"); 1757 return; 1758 } 1759 1760 // Information in the PT_DYNAMIC program header has priority over the 1761 // information in a section header. 1762 if (IsPhdrTableValid) { 1763 if (!IsSecTableValid) 1764 reportUniqueWarning( 1765 "SHT_DYNAMIC dynamic table is invalid: PT_DYNAMIC will be used"); 1766 DynamicTable = FromPhdr; 1767 } else { 1768 reportUniqueWarning( 1769 "PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used"); 1770 DynamicTable = FromSec; 1771 } 1772 1773 parseDynamicTable(); 1774 } 1775 1776 template <typename ELFT> 1777 ELFDumper<ELFT>::ELFDumper(const object::ELFObjectFile<ELFT> &O, 1778 ScopedPrinter &Writer) 1779 : ObjDumper(Writer, O.getFileName()), ObjF(O), Obj(O.getELFFile()), 1780 FileName(O.getFileName()), DynRelRegion(O, *this), 1781 DynRelaRegion(O, *this), DynRelrRegion(O, *this), 1782 DynPLTRelRegion(O, *this), DynSymTabShndxRegion(O, *this), 1783 DynamicTable(O, *this) { 1784 if (!O.IsContentValid()) 1785 return; 1786 1787 typename ELFT::ShdrRange Sections = cantFail(Obj.sections()); 1788 for (const Elf_Shdr &Sec : Sections) { 1789 switch (Sec.sh_type) { 1790 case ELF::SHT_SYMTAB: 1791 if (!DotSymtabSec) 1792 DotSymtabSec = &Sec; 1793 break; 1794 case ELF::SHT_DYNSYM: 1795 if (!DotDynsymSec) 1796 DotDynsymSec = &Sec; 1797 1798 if (!DynSymRegion) { 1799 Expected<DynRegionInfo> RegOrErr = 1800 createDRI(Sec.sh_offset, Sec.sh_size, Sec.sh_entsize); 1801 if (RegOrErr) { 1802 DynSymRegion = *RegOrErr; 1803 DynSymRegion->Context = describe(Sec); 1804 1805 if (Expected<StringRef> E = Obj.getStringTableForSymtab(Sec)) 1806 DynamicStringTable = *E; 1807 else 1808 reportUniqueWarning("unable to get the string table for the " + 1809 describe(Sec) + ": " + toString(E.takeError())); 1810 } else { 1811 reportUniqueWarning("unable to read dynamic symbols from " + 1812 describe(Sec) + ": " + 1813 toString(RegOrErr.takeError())); 1814 } 1815 } 1816 break; 1817 case ELF::SHT_SYMTAB_SHNDX: { 1818 uint32_t SymtabNdx = Sec.sh_link; 1819 if (SymtabNdx >= Sections.size()) { 1820 reportUniqueWarning( 1821 "unable to get the associated symbol table for " + describe(Sec) + 1822 ": sh_link (" + Twine(SymtabNdx) + 1823 ") is greater than or equal to the total number of sections (" + 1824 Twine(Sections.size()) + ")"); 1825 continue; 1826 } 1827 1828 if (Expected<ArrayRef<Elf_Word>> ShndxTableOrErr = 1829 Obj.getSHNDXTable(Sec)) { 1830 if (!ShndxTables.insert({&Sections[SymtabNdx], *ShndxTableOrErr}) 1831 .second) 1832 reportUniqueWarning( 1833 "multiple SHT_SYMTAB_SHNDX sections are linked to " + 1834 describe(Sec)); 1835 } else { 1836 reportUniqueWarning(ShndxTableOrErr.takeError()); 1837 } 1838 break; 1839 } 1840 case ELF::SHT_GNU_versym: 1841 if (!SymbolVersionSection) 1842 SymbolVersionSection = &Sec; 1843 break; 1844 case ELF::SHT_GNU_verdef: 1845 if (!SymbolVersionDefSection) 1846 SymbolVersionDefSection = &Sec; 1847 break; 1848 case ELF::SHT_GNU_verneed: 1849 if (!SymbolVersionNeedSection) 1850 SymbolVersionNeedSection = &Sec; 1851 break; 1852 case ELF::SHT_LLVM_ADDRSIG: 1853 if (!DotAddrsigSec) 1854 DotAddrsigSec = &Sec; 1855 break; 1856 } 1857 } 1858 1859 loadDynamicTable(); 1860 } 1861 1862 template <typename ELFT> void ELFDumper<ELFT>::parseDynamicTable() { 1863 auto toMappedAddr = [&](uint64_t Tag, uint64_t VAddr) -> const uint8_t * { 1864 auto MappedAddrOrError = Obj.toMappedAddr(VAddr, [&](const Twine &Msg) { 1865 this->reportUniqueWarning(Msg); 1866 return Error::success(); 1867 }); 1868 if (!MappedAddrOrError) { 1869 this->reportUniqueWarning("unable to parse DT_" + 1870 Obj.getDynamicTagAsString(Tag) + ": " + 1871 llvm::toString(MappedAddrOrError.takeError())); 1872 return nullptr; 1873 } 1874 return MappedAddrOrError.get(); 1875 }; 1876 1877 const char *StringTableBegin = nullptr; 1878 uint64_t StringTableSize = 0; 1879 Optional<DynRegionInfo> DynSymFromTable; 1880 for (const Elf_Dyn &Dyn : dynamic_table()) { 1881 switch (Dyn.d_tag) { 1882 case ELF::DT_HASH: 1883 HashTable = reinterpret_cast<const Elf_Hash *>( 1884 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 1885 break; 1886 case ELF::DT_GNU_HASH: 1887 GnuHashTable = reinterpret_cast<const Elf_GnuHash *>( 1888 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 1889 break; 1890 case ELF::DT_STRTAB: 1891 StringTableBegin = reinterpret_cast<const char *>( 1892 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 1893 break; 1894 case ELF::DT_STRSZ: 1895 StringTableSize = Dyn.getVal(); 1896 break; 1897 case ELF::DT_SYMTAB: { 1898 // If we can't map the DT_SYMTAB value to an address (e.g. when there are 1899 // no program headers), we ignore its value. 1900 if (const uint8_t *VA = toMappedAddr(Dyn.getTag(), Dyn.getPtr())) { 1901 DynSymFromTable.emplace(ObjF, *this); 1902 DynSymFromTable->Addr = VA; 1903 DynSymFromTable->EntSize = sizeof(Elf_Sym); 1904 DynSymFromTable->EntSizePrintName = ""; 1905 } 1906 break; 1907 } 1908 case ELF::DT_SYMENT: { 1909 uint64_t Val = Dyn.getVal(); 1910 if (Val != sizeof(Elf_Sym)) 1911 this->reportUniqueWarning("DT_SYMENT value of 0x" + 1912 Twine::utohexstr(Val) + 1913 " is not the size of a symbol (0x" + 1914 Twine::utohexstr(sizeof(Elf_Sym)) + ")"); 1915 break; 1916 } 1917 case ELF::DT_RELA: 1918 DynRelaRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 1919 break; 1920 case ELF::DT_RELASZ: 1921 DynRelaRegion.Size = Dyn.getVal(); 1922 DynRelaRegion.SizePrintName = "DT_RELASZ value"; 1923 break; 1924 case ELF::DT_RELAENT: 1925 DynRelaRegion.EntSize = Dyn.getVal(); 1926 DynRelaRegion.EntSizePrintName = "DT_RELAENT value"; 1927 break; 1928 case ELF::DT_SONAME: 1929 SONameOffset = Dyn.getVal(); 1930 break; 1931 case ELF::DT_REL: 1932 DynRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 1933 break; 1934 case ELF::DT_RELSZ: 1935 DynRelRegion.Size = Dyn.getVal(); 1936 DynRelRegion.SizePrintName = "DT_RELSZ value"; 1937 break; 1938 case ELF::DT_RELENT: 1939 DynRelRegion.EntSize = Dyn.getVal(); 1940 DynRelRegion.EntSizePrintName = "DT_RELENT value"; 1941 break; 1942 case ELF::DT_RELR: 1943 case ELF::DT_ANDROID_RELR: 1944 DynRelrRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 1945 break; 1946 case ELF::DT_RELRSZ: 1947 case ELF::DT_ANDROID_RELRSZ: 1948 DynRelrRegion.Size = Dyn.getVal(); 1949 DynRelrRegion.SizePrintName = Dyn.d_tag == ELF::DT_RELRSZ 1950 ? "DT_RELRSZ value" 1951 : "DT_ANDROID_RELRSZ value"; 1952 break; 1953 case ELF::DT_RELRENT: 1954 case ELF::DT_ANDROID_RELRENT: 1955 DynRelrRegion.EntSize = Dyn.getVal(); 1956 DynRelrRegion.EntSizePrintName = Dyn.d_tag == ELF::DT_RELRENT 1957 ? "DT_RELRENT value" 1958 : "DT_ANDROID_RELRENT value"; 1959 break; 1960 case ELF::DT_PLTREL: 1961 if (Dyn.getVal() == DT_REL) 1962 DynPLTRelRegion.EntSize = sizeof(Elf_Rel); 1963 else if (Dyn.getVal() == DT_RELA) 1964 DynPLTRelRegion.EntSize = sizeof(Elf_Rela); 1965 else 1966 reportUniqueWarning(Twine("unknown DT_PLTREL value of ") + 1967 Twine((uint64_t)Dyn.getVal())); 1968 DynPLTRelRegion.EntSizePrintName = "PLTREL entry size"; 1969 break; 1970 case ELF::DT_JMPREL: 1971 DynPLTRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 1972 break; 1973 case ELF::DT_PLTRELSZ: 1974 DynPLTRelRegion.Size = Dyn.getVal(); 1975 DynPLTRelRegion.SizePrintName = "DT_PLTRELSZ value"; 1976 break; 1977 case ELF::DT_SYMTAB_SHNDX: 1978 DynSymTabShndxRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 1979 DynSymTabShndxRegion.EntSize = sizeof(Elf_Word); 1980 break; 1981 } 1982 } 1983 1984 if (StringTableBegin) { 1985 const uint64_t FileSize = Obj.getBufSize(); 1986 const uint64_t Offset = (const uint8_t *)StringTableBegin - Obj.base(); 1987 if (StringTableSize > FileSize - Offset) 1988 reportUniqueWarning( 1989 "the dynamic string table at 0x" + Twine::utohexstr(Offset) + 1990 " goes past the end of the file (0x" + Twine::utohexstr(FileSize) + 1991 ") with DT_STRSZ = 0x" + Twine::utohexstr(StringTableSize)); 1992 else 1993 DynamicStringTable = StringRef(StringTableBegin, StringTableSize); 1994 } 1995 1996 const bool IsHashTableSupported = getHashTableEntSize() == 4; 1997 if (DynSymRegion) { 1998 // Often we find the information about the dynamic symbol table 1999 // location in the SHT_DYNSYM section header. However, the value in 2000 // DT_SYMTAB has priority, because it is used by dynamic loaders to 2001 // locate .dynsym at runtime. The location we find in the section header 2002 // and the location we find here should match. 2003 if (DynSymFromTable && DynSymFromTable->Addr != DynSymRegion->Addr) 2004 reportUniqueWarning( 2005 createError("SHT_DYNSYM section header and DT_SYMTAB disagree about " 2006 "the location of the dynamic symbol table")); 2007 2008 // According to the ELF gABI: "The number of symbol table entries should 2009 // equal nchain". Check to see if the DT_HASH hash table nchain value 2010 // conflicts with the number of symbols in the dynamic symbol table 2011 // according to the section header. 2012 if (HashTable && IsHashTableSupported) { 2013 if (DynSymRegion->EntSize == 0) 2014 reportUniqueWarning("SHT_DYNSYM section has sh_entsize == 0"); 2015 else if (HashTable->nchain != DynSymRegion->Size / DynSymRegion->EntSize) 2016 reportUniqueWarning( 2017 "hash table nchain (" + Twine(HashTable->nchain) + 2018 ") differs from symbol count derived from SHT_DYNSYM section " 2019 "header (" + 2020 Twine(DynSymRegion->Size / DynSymRegion->EntSize) + ")"); 2021 } 2022 } 2023 2024 // Delay the creation of the actual dynamic symbol table until now, so that 2025 // checks can always be made against the section header-based properties, 2026 // without worrying about tag order. 2027 if (DynSymFromTable) { 2028 if (!DynSymRegion) { 2029 DynSymRegion = DynSymFromTable; 2030 } else { 2031 DynSymRegion->Addr = DynSymFromTable->Addr; 2032 DynSymRegion->EntSize = DynSymFromTable->EntSize; 2033 DynSymRegion->EntSizePrintName = DynSymFromTable->EntSizePrintName; 2034 } 2035 } 2036 2037 // Derive the dynamic symbol table size from the DT_HASH hash table, if 2038 // present. 2039 if (HashTable && IsHashTableSupported && DynSymRegion) { 2040 const uint64_t FileSize = Obj.getBufSize(); 2041 const uint64_t DerivedSize = 2042 (uint64_t)HashTable->nchain * DynSymRegion->EntSize; 2043 const uint64_t Offset = (const uint8_t *)DynSymRegion->Addr - Obj.base(); 2044 if (DerivedSize > FileSize - Offset) 2045 reportUniqueWarning( 2046 "the size (0x" + Twine::utohexstr(DerivedSize) + 2047 ") of the dynamic symbol table at 0x" + Twine::utohexstr(Offset) + 2048 ", derived from the hash table, goes past the end of the file (0x" + 2049 Twine::utohexstr(FileSize) + ") and will be ignored"); 2050 else 2051 DynSymRegion->Size = HashTable->nchain * DynSymRegion->EntSize; 2052 } 2053 } 2054 2055 template <typename ELFT> void ELFDumper<ELFT>::printVersionInfo() { 2056 // Dump version symbol section. 2057 printVersionSymbolSection(SymbolVersionSection); 2058 2059 // Dump version definition section. 2060 printVersionDefinitionSection(SymbolVersionDefSection); 2061 2062 // Dump version dependency section. 2063 printVersionDependencySection(SymbolVersionNeedSection); 2064 } 2065 2066 #define LLVM_READOBJ_DT_FLAG_ENT(prefix, enum) \ 2067 { #enum, prefix##_##enum } 2068 2069 static const EnumEntry<unsigned> ElfDynamicDTFlags[] = { 2070 LLVM_READOBJ_DT_FLAG_ENT(DF, ORIGIN), 2071 LLVM_READOBJ_DT_FLAG_ENT(DF, SYMBOLIC), 2072 LLVM_READOBJ_DT_FLAG_ENT(DF, TEXTREL), 2073 LLVM_READOBJ_DT_FLAG_ENT(DF, BIND_NOW), 2074 LLVM_READOBJ_DT_FLAG_ENT(DF, STATIC_TLS) 2075 }; 2076 2077 static const EnumEntry<unsigned> ElfDynamicDTFlags1[] = { 2078 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOW), 2079 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAL), 2080 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GROUP), 2081 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODELETE), 2082 LLVM_READOBJ_DT_FLAG_ENT(DF_1, LOADFLTR), 2083 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INITFIRST), 2084 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOOPEN), 2085 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ORIGIN), 2086 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DIRECT), 2087 LLVM_READOBJ_DT_FLAG_ENT(DF_1, TRANS), 2088 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INTERPOSE), 2089 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODEFLIB), 2090 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODUMP), 2091 LLVM_READOBJ_DT_FLAG_ENT(DF_1, CONFALT), 2092 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ENDFILTEE), 2093 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELDNE), 2094 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELPND), 2095 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODIRECT), 2096 LLVM_READOBJ_DT_FLAG_ENT(DF_1, IGNMULDEF), 2097 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOKSYMS), 2098 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOHDR), 2099 LLVM_READOBJ_DT_FLAG_ENT(DF_1, EDITED), 2100 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NORELOC), 2101 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SYMINTPOSE), 2102 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAUDIT), 2103 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SINGLETON), 2104 LLVM_READOBJ_DT_FLAG_ENT(DF_1, PIE), 2105 }; 2106 2107 static const EnumEntry<unsigned> ElfDynamicDTMipsFlags[] = { 2108 LLVM_READOBJ_DT_FLAG_ENT(RHF, NONE), 2109 LLVM_READOBJ_DT_FLAG_ENT(RHF, QUICKSTART), 2110 LLVM_READOBJ_DT_FLAG_ENT(RHF, NOTPOT), 2111 LLVM_READOBJ_DT_FLAG_ENT(RHS, NO_LIBRARY_REPLACEMENT), 2112 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_MOVE), 2113 LLVM_READOBJ_DT_FLAG_ENT(RHF, SGI_ONLY), 2114 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_INIT), 2115 LLVM_READOBJ_DT_FLAG_ENT(RHF, DELTA_C_PLUS_PLUS), 2116 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_START_INIT), 2117 LLVM_READOBJ_DT_FLAG_ENT(RHF, PIXIE), 2118 LLVM_READOBJ_DT_FLAG_ENT(RHF, DEFAULT_DELAY_LOAD), 2119 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTART), 2120 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTARTED), 2121 LLVM_READOBJ_DT_FLAG_ENT(RHF, CORD), 2122 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_UNRES_UNDEF), 2123 LLVM_READOBJ_DT_FLAG_ENT(RHF, RLD_ORDER_SAFE) 2124 }; 2125 2126 #undef LLVM_READOBJ_DT_FLAG_ENT 2127 2128 template <typename T, typename TFlag> 2129 void printFlags(T Value, ArrayRef<EnumEntry<TFlag>> Flags, raw_ostream &OS) { 2130 SmallVector<EnumEntry<TFlag>, 10> SetFlags; 2131 for (const EnumEntry<TFlag> &Flag : Flags) 2132 if (Flag.Value != 0 && (Value & Flag.Value) == Flag.Value) 2133 SetFlags.push_back(Flag); 2134 2135 for (const EnumEntry<TFlag> &Flag : SetFlags) 2136 OS << Flag.Name << " "; 2137 } 2138 2139 template <class ELFT> 2140 const typename ELFT::Shdr * 2141 ELFDumper<ELFT>::findSectionByName(StringRef Name) const { 2142 for (const Elf_Shdr &Shdr : cantFail(Obj.sections())) { 2143 if (Expected<StringRef> NameOrErr = Obj.getSectionName(Shdr)) { 2144 if (*NameOrErr == Name) 2145 return &Shdr; 2146 } else { 2147 reportUniqueWarning("unable to read the name of " + describe(Shdr) + 2148 ": " + toString(NameOrErr.takeError())); 2149 } 2150 } 2151 return nullptr; 2152 } 2153 2154 template <class ELFT> 2155 std::string ELFDumper<ELFT>::getDynamicEntry(uint64_t Type, 2156 uint64_t Value) const { 2157 auto FormatHexValue = [](uint64_t V) { 2158 std::string Str; 2159 raw_string_ostream OS(Str); 2160 const char *ConvChar = 2161 (opts::Output == opts::GNU) ? "0x%" PRIx64 : "0x%" PRIX64; 2162 OS << format(ConvChar, V); 2163 return OS.str(); 2164 }; 2165 2166 auto FormatFlags = [](uint64_t V, 2167 llvm::ArrayRef<llvm::EnumEntry<unsigned int>> Array) { 2168 std::string Str; 2169 raw_string_ostream OS(Str); 2170 printFlags(V, Array, OS); 2171 return OS.str(); 2172 }; 2173 2174 // Handle custom printing of architecture specific tags 2175 switch (Obj.getHeader().e_machine) { 2176 case EM_AARCH64: 2177 switch (Type) { 2178 case DT_AARCH64_BTI_PLT: 2179 case DT_AARCH64_PAC_PLT: 2180 case DT_AARCH64_VARIANT_PCS: 2181 return std::to_string(Value); 2182 default: 2183 break; 2184 } 2185 break; 2186 case EM_HEXAGON: 2187 switch (Type) { 2188 case DT_HEXAGON_VER: 2189 return std::to_string(Value); 2190 case DT_HEXAGON_SYMSZ: 2191 case DT_HEXAGON_PLT: 2192 return FormatHexValue(Value); 2193 default: 2194 break; 2195 } 2196 break; 2197 case EM_MIPS: 2198 switch (Type) { 2199 case DT_MIPS_RLD_VERSION: 2200 case DT_MIPS_LOCAL_GOTNO: 2201 case DT_MIPS_SYMTABNO: 2202 case DT_MIPS_UNREFEXTNO: 2203 return std::to_string(Value); 2204 case DT_MIPS_TIME_STAMP: 2205 case DT_MIPS_ICHECKSUM: 2206 case DT_MIPS_IVERSION: 2207 case DT_MIPS_BASE_ADDRESS: 2208 case DT_MIPS_MSYM: 2209 case DT_MIPS_CONFLICT: 2210 case DT_MIPS_LIBLIST: 2211 case DT_MIPS_CONFLICTNO: 2212 case DT_MIPS_LIBLISTNO: 2213 case DT_MIPS_GOTSYM: 2214 case DT_MIPS_HIPAGENO: 2215 case DT_MIPS_RLD_MAP: 2216 case DT_MIPS_DELTA_CLASS: 2217 case DT_MIPS_DELTA_CLASS_NO: 2218 case DT_MIPS_DELTA_INSTANCE: 2219 case DT_MIPS_DELTA_RELOC: 2220 case DT_MIPS_DELTA_RELOC_NO: 2221 case DT_MIPS_DELTA_SYM: 2222 case DT_MIPS_DELTA_SYM_NO: 2223 case DT_MIPS_DELTA_CLASSSYM: 2224 case DT_MIPS_DELTA_CLASSSYM_NO: 2225 case DT_MIPS_CXX_FLAGS: 2226 case DT_MIPS_PIXIE_INIT: 2227 case DT_MIPS_SYMBOL_LIB: 2228 case DT_MIPS_LOCALPAGE_GOTIDX: 2229 case DT_MIPS_LOCAL_GOTIDX: 2230 case DT_MIPS_HIDDEN_GOTIDX: 2231 case DT_MIPS_PROTECTED_GOTIDX: 2232 case DT_MIPS_OPTIONS: 2233 case DT_MIPS_INTERFACE: 2234 case DT_MIPS_DYNSTR_ALIGN: 2235 case DT_MIPS_INTERFACE_SIZE: 2236 case DT_MIPS_RLD_TEXT_RESOLVE_ADDR: 2237 case DT_MIPS_PERF_SUFFIX: 2238 case DT_MIPS_COMPACT_SIZE: 2239 case DT_MIPS_GP_VALUE: 2240 case DT_MIPS_AUX_DYNAMIC: 2241 case DT_MIPS_PLTGOT: 2242 case DT_MIPS_RWPLT: 2243 case DT_MIPS_RLD_MAP_REL: 2244 return FormatHexValue(Value); 2245 case DT_MIPS_FLAGS: 2246 return FormatFlags(Value, makeArrayRef(ElfDynamicDTMipsFlags)); 2247 default: 2248 break; 2249 } 2250 break; 2251 default: 2252 break; 2253 } 2254 2255 switch (Type) { 2256 case DT_PLTREL: 2257 if (Value == DT_REL) 2258 return "REL"; 2259 if (Value == DT_RELA) 2260 return "RELA"; 2261 LLVM_FALLTHROUGH; 2262 case DT_PLTGOT: 2263 case DT_HASH: 2264 case DT_STRTAB: 2265 case DT_SYMTAB: 2266 case DT_RELA: 2267 case DT_INIT: 2268 case DT_FINI: 2269 case DT_REL: 2270 case DT_JMPREL: 2271 case DT_INIT_ARRAY: 2272 case DT_FINI_ARRAY: 2273 case DT_PREINIT_ARRAY: 2274 case DT_DEBUG: 2275 case DT_VERDEF: 2276 case DT_VERNEED: 2277 case DT_VERSYM: 2278 case DT_GNU_HASH: 2279 case DT_NULL: 2280 return FormatHexValue(Value); 2281 case DT_RELACOUNT: 2282 case DT_RELCOUNT: 2283 case DT_VERDEFNUM: 2284 case DT_VERNEEDNUM: 2285 return std::to_string(Value); 2286 case DT_PLTRELSZ: 2287 case DT_RELASZ: 2288 case DT_RELAENT: 2289 case DT_STRSZ: 2290 case DT_SYMENT: 2291 case DT_RELSZ: 2292 case DT_RELENT: 2293 case DT_INIT_ARRAYSZ: 2294 case DT_FINI_ARRAYSZ: 2295 case DT_PREINIT_ARRAYSZ: 2296 case DT_ANDROID_RELSZ: 2297 case DT_ANDROID_RELASZ: 2298 return std::to_string(Value) + " (bytes)"; 2299 case DT_NEEDED: 2300 case DT_SONAME: 2301 case DT_AUXILIARY: 2302 case DT_USED: 2303 case DT_FILTER: 2304 case DT_RPATH: 2305 case DT_RUNPATH: { 2306 const std::map<uint64_t, const char *> TagNames = { 2307 {DT_NEEDED, "Shared library"}, {DT_SONAME, "Library soname"}, 2308 {DT_AUXILIARY, "Auxiliary library"}, {DT_USED, "Not needed object"}, 2309 {DT_FILTER, "Filter library"}, {DT_RPATH, "Library rpath"}, 2310 {DT_RUNPATH, "Library runpath"}, 2311 }; 2312 2313 return (Twine(TagNames.at(Type)) + ": [" + getDynamicString(Value) + "]") 2314 .str(); 2315 } 2316 case DT_FLAGS: 2317 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags)); 2318 case DT_FLAGS_1: 2319 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags1)); 2320 default: 2321 return FormatHexValue(Value); 2322 } 2323 } 2324 2325 template <class ELFT> 2326 StringRef ELFDumper<ELFT>::getDynamicString(uint64_t Value) const { 2327 if (DynamicStringTable.empty() && !DynamicStringTable.data()) { 2328 reportUniqueWarning("string table was not found"); 2329 return "<?>"; 2330 } 2331 2332 auto WarnAndReturn = [this](const Twine &Msg, uint64_t Offset) { 2333 reportUniqueWarning("string table at offset 0x" + Twine::utohexstr(Offset) + 2334 Msg); 2335 return "<?>"; 2336 }; 2337 2338 const uint64_t FileSize = Obj.getBufSize(); 2339 const uint64_t Offset = 2340 (const uint8_t *)DynamicStringTable.data() - Obj.base(); 2341 if (DynamicStringTable.size() > FileSize - Offset) 2342 return WarnAndReturn(" with size 0x" + 2343 Twine::utohexstr(DynamicStringTable.size()) + 2344 " goes past the end of the file (0x" + 2345 Twine::utohexstr(FileSize) + ")", 2346 Offset); 2347 2348 if (Value >= DynamicStringTable.size()) 2349 return WarnAndReturn( 2350 ": unable to read the string at 0x" + Twine::utohexstr(Offset + Value) + 2351 ": it goes past the end of the table (0x" + 2352 Twine::utohexstr(Offset + DynamicStringTable.size()) + ")", 2353 Offset); 2354 2355 if (DynamicStringTable.back() != '\0') 2356 return WarnAndReturn(": unable to read the string at 0x" + 2357 Twine::utohexstr(Offset + Value) + 2358 ": the string table is not null-terminated", 2359 Offset); 2360 2361 return DynamicStringTable.data() + Value; 2362 } 2363 2364 template <class ELFT> void ELFDumper<ELFT>::printUnwindInfo() { 2365 DwarfCFIEH::PrinterContext<ELFT> Ctx(W, ObjF); 2366 Ctx.printUnwindInformation(); 2367 } 2368 2369 // The namespace is needed to fix the compilation with GCC older than 7.0+. 2370 namespace { 2371 template <> void ELFDumper<ELF32LE>::printUnwindInfo() { 2372 if (Obj.getHeader().e_machine == EM_ARM) { 2373 ARM::EHABI::PrinterContext<ELF32LE> Ctx(W, Obj, ObjF.getFileName(), 2374 DotSymtabSec); 2375 Ctx.PrintUnwindInformation(); 2376 } 2377 DwarfCFIEH::PrinterContext<ELF32LE> Ctx(W, ObjF); 2378 Ctx.printUnwindInformation(); 2379 } 2380 } // namespace 2381 2382 template <class ELFT> void ELFDumper<ELFT>::printNeededLibraries() { 2383 ListScope D(W, "NeededLibraries"); 2384 2385 std::vector<StringRef> Libs; 2386 for (const auto &Entry : dynamic_table()) 2387 if (Entry.d_tag == ELF::DT_NEEDED) 2388 Libs.push_back(getDynamicString(Entry.d_un.d_val)); 2389 2390 llvm::sort(Libs); 2391 2392 for (StringRef L : Libs) 2393 W.startLine() << L << "\n"; 2394 } 2395 2396 template <class ELFT> 2397 static Error checkHashTable(const ELFDumper<ELFT> &Dumper, 2398 const typename ELFT::Hash *H, 2399 bool *IsHeaderValid = nullptr) { 2400 const ELFFile<ELFT> &Obj = Dumper.getElfObject().getELFFile(); 2401 const uint64_t SecOffset = (const uint8_t *)H - Obj.base(); 2402 if (Dumper.getHashTableEntSize() == 8) { 2403 auto It = llvm::find_if(ElfMachineType, [&](const EnumEntry<unsigned> &E) { 2404 return E.Value == Obj.getHeader().e_machine; 2405 }); 2406 if (IsHeaderValid) 2407 *IsHeaderValid = false; 2408 return createError("the hash table at 0x" + Twine::utohexstr(SecOffset) + 2409 " is not supported: it contains non-standard 8 " 2410 "byte entries on " + 2411 It->AltName + " platform"); 2412 } 2413 2414 auto MakeError = [&](const Twine &Msg = "") { 2415 return createError("the hash table at offset 0x" + 2416 Twine::utohexstr(SecOffset) + 2417 " goes past the end of the file (0x" + 2418 Twine::utohexstr(Obj.getBufSize()) + ")" + Msg); 2419 }; 2420 2421 // Each SHT_HASH section starts from two 32-bit fields: nbucket and nchain. 2422 const unsigned HeaderSize = 2 * sizeof(typename ELFT::Word); 2423 2424 if (IsHeaderValid) 2425 *IsHeaderValid = Obj.getBufSize() - SecOffset >= HeaderSize; 2426 2427 if (Obj.getBufSize() - SecOffset < HeaderSize) 2428 return MakeError(); 2429 2430 if (Obj.getBufSize() - SecOffset - HeaderSize < 2431 ((uint64_t)H->nbucket + H->nchain) * sizeof(typename ELFT::Word)) 2432 return MakeError(", nbucket = " + Twine(H->nbucket) + 2433 ", nchain = " + Twine(H->nchain)); 2434 return Error::success(); 2435 } 2436 2437 template <class ELFT> 2438 static Error checkGNUHashTable(const ELFFile<ELFT> &Obj, 2439 const typename ELFT::GnuHash *GnuHashTable, 2440 bool *IsHeaderValid = nullptr) { 2441 const uint8_t *TableData = reinterpret_cast<const uint8_t *>(GnuHashTable); 2442 assert(TableData >= Obj.base() && TableData < Obj.base() + Obj.getBufSize() && 2443 "GnuHashTable must always point to a location inside the file"); 2444 2445 uint64_t TableOffset = TableData - Obj.base(); 2446 if (IsHeaderValid) 2447 *IsHeaderValid = TableOffset + /*Header size:*/ 16 < Obj.getBufSize(); 2448 if (TableOffset + 16 + (uint64_t)GnuHashTable->nbuckets * 4 + 2449 (uint64_t)GnuHashTable->maskwords * sizeof(typename ELFT::Off) >= 2450 Obj.getBufSize()) 2451 return createError("unable to dump the SHT_GNU_HASH " 2452 "section at 0x" + 2453 Twine::utohexstr(TableOffset) + 2454 ": it goes past the end of the file"); 2455 return Error::success(); 2456 } 2457 2458 template <typename ELFT> void ELFDumper<ELFT>::printHashTable() { 2459 DictScope D(W, "HashTable"); 2460 if (!HashTable) 2461 return; 2462 2463 bool IsHeaderValid; 2464 Error Err = checkHashTable(*this, HashTable, &IsHeaderValid); 2465 if (IsHeaderValid) { 2466 W.printNumber("Num Buckets", HashTable->nbucket); 2467 W.printNumber("Num Chains", HashTable->nchain); 2468 } 2469 2470 if (Err) { 2471 reportUniqueWarning(std::move(Err)); 2472 return; 2473 } 2474 2475 W.printList("Buckets", HashTable->buckets()); 2476 W.printList("Chains", HashTable->chains()); 2477 } 2478 2479 template <class ELFT> 2480 static Expected<ArrayRef<typename ELFT::Word>> 2481 getGnuHashTableChains(Optional<DynRegionInfo> DynSymRegion, 2482 const typename ELFT::GnuHash *GnuHashTable) { 2483 if (!DynSymRegion) 2484 return createError("no dynamic symbol table found"); 2485 2486 ArrayRef<typename ELFT::Sym> DynSymTable = 2487 DynSymRegion->template getAsArrayRef<typename ELFT::Sym>(); 2488 size_t NumSyms = DynSymTable.size(); 2489 if (!NumSyms) 2490 return createError("the dynamic symbol table is empty"); 2491 2492 if (GnuHashTable->symndx < NumSyms) 2493 return GnuHashTable->values(NumSyms); 2494 2495 // A normal empty GNU hash table section produced by linker might have 2496 // symndx set to the number of dynamic symbols + 1 (for the zero symbol) 2497 // and have dummy null values in the Bloom filter and in the buckets 2498 // vector (or no values at all). It happens because the value of symndx is not 2499 // important for dynamic loaders when the GNU hash table is empty. They just 2500 // skip the whole object during symbol lookup. In such cases, the symndx value 2501 // is irrelevant and we should not report a warning. 2502 ArrayRef<typename ELFT::Word> Buckets = GnuHashTable->buckets(); 2503 if (!llvm::all_of(Buckets, [](typename ELFT::Word V) { return V == 0; })) 2504 return createError( 2505 "the first hashed symbol index (" + Twine(GnuHashTable->symndx) + 2506 ") is greater than or equal to the number of dynamic symbols (" + 2507 Twine(NumSyms) + ")"); 2508 // There is no way to represent an array of (dynamic symbols count - symndx) 2509 // length. 2510 return ArrayRef<typename ELFT::Word>(); 2511 } 2512 2513 template <typename ELFT> 2514 void ELFDumper<ELFT>::printGnuHashTable() { 2515 DictScope D(W, "GnuHashTable"); 2516 if (!GnuHashTable) 2517 return; 2518 2519 bool IsHeaderValid; 2520 Error Err = checkGNUHashTable<ELFT>(Obj, GnuHashTable, &IsHeaderValid); 2521 if (IsHeaderValid) { 2522 W.printNumber("Num Buckets", GnuHashTable->nbuckets); 2523 W.printNumber("First Hashed Symbol Index", GnuHashTable->symndx); 2524 W.printNumber("Num Mask Words", GnuHashTable->maskwords); 2525 W.printNumber("Shift Count", GnuHashTable->shift2); 2526 } 2527 2528 if (Err) { 2529 reportUniqueWarning(std::move(Err)); 2530 return; 2531 } 2532 2533 ArrayRef<typename ELFT::Off> BloomFilter = GnuHashTable->filter(); 2534 W.printHexList("Bloom Filter", BloomFilter); 2535 2536 ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets(); 2537 W.printList("Buckets", Buckets); 2538 2539 Expected<ArrayRef<Elf_Word>> Chains = 2540 getGnuHashTableChains<ELFT>(DynSymRegion, GnuHashTable); 2541 if (!Chains) { 2542 reportUniqueWarning("unable to dump 'Values' for the SHT_GNU_HASH " 2543 "section: " + 2544 toString(Chains.takeError())); 2545 return; 2546 } 2547 2548 W.printHexList("Values", *Chains); 2549 } 2550 2551 template <typename ELFT> void ELFDumper<ELFT>::printLoadName() { 2552 StringRef SOName = "<Not found>"; 2553 if (SONameOffset) 2554 SOName = getDynamicString(*SONameOffset); 2555 W.printString("LoadName", SOName); 2556 } 2557 2558 template <class ELFT> void ELFDumper<ELFT>::printArchSpecificInfo() { 2559 switch (Obj.getHeader().e_machine) { 2560 case EM_ARM: 2561 if (Obj.isLE()) 2562 printAttributes(ELF::SHT_ARM_ATTRIBUTES, 2563 std::make_unique<ARMAttributeParser>(&W), 2564 support::little); 2565 else 2566 reportUniqueWarning("attribute printing not implemented for big-endian " 2567 "ARM objects"); 2568 break; 2569 case EM_RISCV: 2570 if (Obj.isLE()) 2571 printAttributes(ELF::SHT_RISCV_ATTRIBUTES, 2572 std::make_unique<RISCVAttributeParser>(&W), 2573 support::little); 2574 else 2575 reportUniqueWarning("attribute printing not implemented for big-endian " 2576 "RISC-V objects"); 2577 break; 2578 case EM_MIPS: { 2579 printMipsABIFlags(); 2580 printMipsOptions(); 2581 printMipsReginfo(); 2582 MipsGOTParser<ELFT> Parser(*this); 2583 if (Error E = Parser.findGOT(dynamic_table(), dynamic_symbols())) 2584 reportUniqueWarning(std::move(E)); 2585 else if (!Parser.isGotEmpty()) 2586 printMipsGOT(Parser); 2587 2588 if (Error E = Parser.findPLT(dynamic_table())) 2589 reportUniqueWarning(std::move(E)); 2590 else if (!Parser.isPltEmpty()) 2591 printMipsPLT(Parser); 2592 break; 2593 } 2594 default: 2595 break; 2596 } 2597 } 2598 2599 template <class ELFT> 2600 void ELFDumper<ELFT>::printAttributes( 2601 unsigned AttrShType, std::unique_ptr<ELFAttributeParser> AttrParser, 2602 support::endianness Endianness) { 2603 assert((AttrShType != ELF::SHT_NULL) && AttrParser && 2604 "Incomplete ELF attribute implementation"); 2605 DictScope BA(W, "BuildAttributes"); 2606 for (const Elf_Shdr &Sec : cantFail(Obj.sections())) { 2607 if (Sec.sh_type != AttrShType) 2608 continue; 2609 2610 ArrayRef<uint8_t> Contents; 2611 if (Expected<ArrayRef<uint8_t>> ContentOrErr = 2612 Obj.getSectionContents(Sec)) { 2613 Contents = *ContentOrErr; 2614 if (Contents.empty()) { 2615 reportUniqueWarning("the " + describe(Sec) + " is empty"); 2616 continue; 2617 } 2618 } else { 2619 reportUniqueWarning("unable to read the content of the " + describe(Sec) + 2620 ": " + toString(ContentOrErr.takeError())); 2621 continue; 2622 } 2623 2624 W.printHex("FormatVersion", Contents[0]); 2625 2626 if (Error E = AttrParser->parse(Contents, Endianness)) 2627 reportUniqueWarning("unable to dump attributes from the " + 2628 describe(Sec) + ": " + toString(std::move(E))); 2629 } 2630 } 2631 2632 namespace { 2633 2634 template <class ELFT> class MipsGOTParser { 2635 public: 2636 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT) 2637 using Entry = typename ELFT::Addr; 2638 using Entries = ArrayRef<Entry>; 2639 2640 const bool IsStatic; 2641 const ELFFile<ELFT> &Obj; 2642 const ELFDumper<ELFT> &Dumper; 2643 2644 MipsGOTParser(const ELFDumper<ELFT> &D); 2645 Error findGOT(Elf_Dyn_Range DynTable, Elf_Sym_Range DynSyms); 2646 Error findPLT(Elf_Dyn_Range DynTable); 2647 2648 bool isGotEmpty() const { return GotEntries.empty(); } 2649 bool isPltEmpty() const { return PltEntries.empty(); } 2650 2651 uint64_t getGp() const; 2652 2653 const Entry *getGotLazyResolver() const; 2654 const Entry *getGotModulePointer() const; 2655 const Entry *getPltLazyResolver() const; 2656 const Entry *getPltModulePointer() const; 2657 2658 Entries getLocalEntries() const; 2659 Entries getGlobalEntries() const; 2660 Entries getOtherEntries() const; 2661 Entries getPltEntries() const; 2662 2663 uint64_t getGotAddress(const Entry * E) const; 2664 int64_t getGotOffset(const Entry * E) const; 2665 const Elf_Sym *getGotSym(const Entry *E) const; 2666 2667 uint64_t getPltAddress(const Entry * E) const; 2668 const Elf_Sym *getPltSym(const Entry *E) const; 2669 2670 StringRef getPltStrTable() const { return PltStrTable; } 2671 const Elf_Shdr *getPltSymTable() const { return PltSymTable; } 2672 2673 private: 2674 const Elf_Shdr *GotSec; 2675 size_t LocalNum; 2676 size_t GlobalNum; 2677 2678 const Elf_Shdr *PltSec; 2679 const Elf_Shdr *PltRelSec; 2680 const Elf_Shdr *PltSymTable; 2681 StringRef FileName; 2682 2683 Elf_Sym_Range GotDynSyms; 2684 StringRef PltStrTable; 2685 2686 Entries GotEntries; 2687 Entries PltEntries; 2688 }; 2689 2690 } // end anonymous namespace 2691 2692 template <class ELFT> 2693 MipsGOTParser<ELFT>::MipsGOTParser(const ELFDumper<ELFT> &D) 2694 : IsStatic(D.dynamic_table().empty()), Obj(D.getElfObject().getELFFile()), 2695 Dumper(D), GotSec(nullptr), LocalNum(0), GlobalNum(0), PltSec(nullptr), 2696 PltRelSec(nullptr), PltSymTable(nullptr), 2697 FileName(D.getElfObject().getFileName()) {} 2698 2699 template <class ELFT> 2700 Error MipsGOTParser<ELFT>::findGOT(Elf_Dyn_Range DynTable, 2701 Elf_Sym_Range DynSyms) { 2702 // See "Global Offset Table" in Chapter 5 in the following document 2703 // for detailed GOT description. 2704 // ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf 2705 2706 // Find static GOT secton. 2707 if (IsStatic) { 2708 GotSec = Dumper.findSectionByName(".got"); 2709 if (!GotSec) 2710 return Error::success(); 2711 2712 ArrayRef<uint8_t> Content = 2713 unwrapOrError(FileName, Obj.getSectionContents(*GotSec)); 2714 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2715 Content.size() / sizeof(Entry)); 2716 LocalNum = GotEntries.size(); 2717 return Error::success(); 2718 } 2719 2720 // Lookup dynamic table tags which define the GOT layout. 2721 Optional<uint64_t> DtPltGot; 2722 Optional<uint64_t> DtLocalGotNum; 2723 Optional<uint64_t> DtGotSym; 2724 for (const auto &Entry : DynTable) { 2725 switch (Entry.getTag()) { 2726 case ELF::DT_PLTGOT: 2727 DtPltGot = Entry.getVal(); 2728 break; 2729 case ELF::DT_MIPS_LOCAL_GOTNO: 2730 DtLocalGotNum = Entry.getVal(); 2731 break; 2732 case ELF::DT_MIPS_GOTSYM: 2733 DtGotSym = Entry.getVal(); 2734 break; 2735 } 2736 } 2737 2738 if (!DtPltGot && !DtLocalGotNum && !DtGotSym) 2739 return Error::success(); 2740 2741 if (!DtPltGot) 2742 return createError("cannot find PLTGOT dynamic tag"); 2743 if (!DtLocalGotNum) 2744 return createError("cannot find MIPS_LOCAL_GOTNO dynamic tag"); 2745 if (!DtGotSym) 2746 return createError("cannot find MIPS_GOTSYM dynamic tag"); 2747 2748 size_t DynSymTotal = DynSyms.size(); 2749 if (*DtGotSym > DynSymTotal) 2750 return createError("DT_MIPS_GOTSYM value (" + Twine(*DtGotSym) + 2751 ") exceeds the number of dynamic symbols (" + 2752 Twine(DynSymTotal) + ")"); 2753 2754 GotSec = findNotEmptySectionByAddress(Obj, FileName, *DtPltGot); 2755 if (!GotSec) 2756 return createError("there is no non-empty GOT section at 0x" + 2757 Twine::utohexstr(*DtPltGot)); 2758 2759 LocalNum = *DtLocalGotNum; 2760 GlobalNum = DynSymTotal - *DtGotSym; 2761 2762 ArrayRef<uint8_t> Content = 2763 unwrapOrError(FileName, Obj.getSectionContents(*GotSec)); 2764 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2765 Content.size() / sizeof(Entry)); 2766 GotDynSyms = DynSyms.drop_front(*DtGotSym); 2767 2768 return Error::success(); 2769 } 2770 2771 template <class ELFT> 2772 Error MipsGOTParser<ELFT>::findPLT(Elf_Dyn_Range DynTable) { 2773 // Lookup dynamic table tags which define the PLT layout. 2774 Optional<uint64_t> DtMipsPltGot; 2775 Optional<uint64_t> DtJmpRel; 2776 for (const auto &Entry : DynTable) { 2777 switch (Entry.getTag()) { 2778 case ELF::DT_MIPS_PLTGOT: 2779 DtMipsPltGot = Entry.getVal(); 2780 break; 2781 case ELF::DT_JMPREL: 2782 DtJmpRel = Entry.getVal(); 2783 break; 2784 } 2785 } 2786 2787 if (!DtMipsPltGot && !DtJmpRel) 2788 return Error::success(); 2789 2790 // Find PLT section. 2791 if (!DtMipsPltGot) 2792 return createError("cannot find MIPS_PLTGOT dynamic tag"); 2793 if (!DtJmpRel) 2794 return createError("cannot find JMPREL dynamic tag"); 2795 2796 PltSec = findNotEmptySectionByAddress(Obj, FileName, *DtMipsPltGot); 2797 if (!PltSec) 2798 return createError("there is no non-empty PLTGOT section at 0x" + 2799 Twine::utohexstr(*DtMipsPltGot)); 2800 2801 PltRelSec = findNotEmptySectionByAddress(Obj, FileName, *DtJmpRel); 2802 if (!PltRelSec) 2803 return createError("there is no non-empty RELPLT section at 0x" + 2804 Twine::utohexstr(*DtJmpRel)); 2805 2806 if (Expected<ArrayRef<uint8_t>> PltContentOrErr = 2807 Obj.getSectionContents(*PltSec)) 2808 PltEntries = 2809 Entries(reinterpret_cast<const Entry *>(PltContentOrErr->data()), 2810 PltContentOrErr->size() / sizeof(Entry)); 2811 else 2812 return createError("unable to read PLTGOT section content: " + 2813 toString(PltContentOrErr.takeError())); 2814 2815 if (Expected<const Elf_Shdr *> PltSymTableOrErr = 2816 Obj.getSection(PltRelSec->sh_link)) 2817 PltSymTable = *PltSymTableOrErr; 2818 else 2819 return createError("unable to get a symbol table linked to the " + 2820 describe(Obj, *PltRelSec) + ": " + 2821 toString(PltSymTableOrErr.takeError())); 2822 2823 if (Expected<StringRef> StrTabOrErr = 2824 Obj.getStringTableForSymtab(*PltSymTable)) 2825 PltStrTable = *StrTabOrErr; 2826 else 2827 return createError("unable to get a string table for the " + 2828 describe(Obj, *PltSymTable) + ": " + 2829 toString(StrTabOrErr.takeError())); 2830 2831 return Error::success(); 2832 } 2833 2834 template <class ELFT> uint64_t MipsGOTParser<ELFT>::getGp() const { 2835 return GotSec->sh_addr + 0x7ff0; 2836 } 2837 2838 template <class ELFT> 2839 const typename MipsGOTParser<ELFT>::Entry * 2840 MipsGOTParser<ELFT>::getGotLazyResolver() const { 2841 return LocalNum > 0 ? &GotEntries[0] : nullptr; 2842 } 2843 2844 template <class ELFT> 2845 const typename MipsGOTParser<ELFT>::Entry * 2846 MipsGOTParser<ELFT>::getGotModulePointer() const { 2847 if (LocalNum < 2) 2848 return nullptr; 2849 const Entry &E = GotEntries[1]; 2850 if ((E >> (sizeof(Entry) * 8 - 1)) == 0) 2851 return nullptr; 2852 return &E; 2853 } 2854 2855 template <class ELFT> 2856 typename MipsGOTParser<ELFT>::Entries 2857 MipsGOTParser<ELFT>::getLocalEntries() const { 2858 size_t Skip = getGotModulePointer() ? 2 : 1; 2859 if (LocalNum - Skip <= 0) 2860 return Entries(); 2861 return GotEntries.slice(Skip, LocalNum - Skip); 2862 } 2863 2864 template <class ELFT> 2865 typename MipsGOTParser<ELFT>::Entries 2866 MipsGOTParser<ELFT>::getGlobalEntries() const { 2867 if (GlobalNum == 0) 2868 return Entries(); 2869 return GotEntries.slice(LocalNum, GlobalNum); 2870 } 2871 2872 template <class ELFT> 2873 typename MipsGOTParser<ELFT>::Entries 2874 MipsGOTParser<ELFT>::getOtherEntries() const { 2875 size_t OtherNum = GotEntries.size() - LocalNum - GlobalNum; 2876 if (OtherNum == 0) 2877 return Entries(); 2878 return GotEntries.slice(LocalNum + GlobalNum, OtherNum); 2879 } 2880 2881 template <class ELFT> 2882 uint64_t MipsGOTParser<ELFT>::getGotAddress(const Entry *E) const { 2883 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 2884 return GotSec->sh_addr + Offset; 2885 } 2886 2887 template <class ELFT> 2888 int64_t MipsGOTParser<ELFT>::getGotOffset(const Entry *E) const { 2889 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 2890 return Offset - 0x7ff0; 2891 } 2892 2893 template <class ELFT> 2894 const typename MipsGOTParser<ELFT>::Elf_Sym * 2895 MipsGOTParser<ELFT>::getGotSym(const Entry *E) const { 2896 int64_t Offset = std::distance(GotEntries.data(), E); 2897 return &GotDynSyms[Offset - LocalNum]; 2898 } 2899 2900 template <class ELFT> 2901 const typename MipsGOTParser<ELFT>::Entry * 2902 MipsGOTParser<ELFT>::getPltLazyResolver() const { 2903 return PltEntries.empty() ? nullptr : &PltEntries[0]; 2904 } 2905 2906 template <class ELFT> 2907 const typename MipsGOTParser<ELFT>::Entry * 2908 MipsGOTParser<ELFT>::getPltModulePointer() const { 2909 return PltEntries.size() < 2 ? nullptr : &PltEntries[1]; 2910 } 2911 2912 template <class ELFT> 2913 typename MipsGOTParser<ELFT>::Entries 2914 MipsGOTParser<ELFT>::getPltEntries() const { 2915 if (PltEntries.size() <= 2) 2916 return Entries(); 2917 return PltEntries.slice(2, PltEntries.size() - 2); 2918 } 2919 2920 template <class ELFT> 2921 uint64_t MipsGOTParser<ELFT>::getPltAddress(const Entry *E) const { 2922 int64_t Offset = std::distance(PltEntries.data(), E) * sizeof(Entry); 2923 return PltSec->sh_addr + Offset; 2924 } 2925 2926 template <class ELFT> 2927 const typename MipsGOTParser<ELFT>::Elf_Sym * 2928 MipsGOTParser<ELFT>::getPltSym(const Entry *E) const { 2929 int64_t Offset = std::distance(getPltEntries().data(), E); 2930 if (PltRelSec->sh_type == ELF::SHT_REL) { 2931 Elf_Rel_Range Rels = unwrapOrError(FileName, Obj.rels(*PltRelSec)); 2932 return unwrapOrError(FileName, 2933 Obj.getRelocationSymbol(Rels[Offset], PltSymTable)); 2934 } else { 2935 Elf_Rela_Range Rels = unwrapOrError(FileName, Obj.relas(*PltRelSec)); 2936 return unwrapOrError(FileName, 2937 Obj.getRelocationSymbol(Rels[Offset], PltSymTable)); 2938 } 2939 } 2940 2941 static const EnumEntry<unsigned> ElfMipsISAExtType[] = { 2942 {"None", Mips::AFL_EXT_NONE}, 2943 {"Broadcom SB-1", Mips::AFL_EXT_SB1}, 2944 {"Cavium Networks Octeon", Mips::AFL_EXT_OCTEON}, 2945 {"Cavium Networks Octeon2", Mips::AFL_EXT_OCTEON2}, 2946 {"Cavium Networks OcteonP", Mips::AFL_EXT_OCTEONP}, 2947 {"Cavium Networks Octeon3", Mips::AFL_EXT_OCTEON3}, 2948 {"LSI R4010", Mips::AFL_EXT_4010}, 2949 {"Loongson 2E", Mips::AFL_EXT_LOONGSON_2E}, 2950 {"Loongson 2F", Mips::AFL_EXT_LOONGSON_2F}, 2951 {"Loongson 3A", Mips::AFL_EXT_LOONGSON_3A}, 2952 {"MIPS R4650", Mips::AFL_EXT_4650}, 2953 {"MIPS R5900", Mips::AFL_EXT_5900}, 2954 {"MIPS R10000", Mips::AFL_EXT_10000}, 2955 {"NEC VR4100", Mips::AFL_EXT_4100}, 2956 {"NEC VR4111/VR4181", Mips::AFL_EXT_4111}, 2957 {"NEC VR4120", Mips::AFL_EXT_4120}, 2958 {"NEC VR5400", Mips::AFL_EXT_5400}, 2959 {"NEC VR5500", Mips::AFL_EXT_5500}, 2960 {"RMI Xlr", Mips::AFL_EXT_XLR}, 2961 {"Toshiba R3900", Mips::AFL_EXT_3900} 2962 }; 2963 2964 static const EnumEntry<unsigned> ElfMipsASEFlags[] = { 2965 {"DSP", Mips::AFL_ASE_DSP}, 2966 {"DSPR2", Mips::AFL_ASE_DSPR2}, 2967 {"Enhanced VA Scheme", Mips::AFL_ASE_EVA}, 2968 {"MCU", Mips::AFL_ASE_MCU}, 2969 {"MDMX", Mips::AFL_ASE_MDMX}, 2970 {"MIPS-3D", Mips::AFL_ASE_MIPS3D}, 2971 {"MT", Mips::AFL_ASE_MT}, 2972 {"SmartMIPS", Mips::AFL_ASE_SMARTMIPS}, 2973 {"VZ", Mips::AFL_ASE_VIRT}, 2974 {"MSA", Mips::AFL_ASE_MSA}, 2975 {"MIPS16", Mips::AFL_ASE_MIPS16}, 2976 {"microMIPS", Mips::AFL_ASE_MICROMIPS}, 2977 {"XPA", Mips::AFL_ASE_XPA}, 2978 {"CRC", Mips::AFL_ASE_CRC}, 2979 {"GINV", Mips::AFL_ASE_GINV}, 2980 }; 2981 2982 static const EnumEntry<unsigned> ElfMipsFpABIType[] = { 2983 {"Hard or soft float", Mips::Val_GNU_MIPS_ABI_FP_ANY}, 2984 {"Hard float (double precision)", Mips::Val_GNU_MIPS_ABI_FP_DOUBLE}, 2985 {"Hard float (single precision)", Mips::Val_GNU_MIPS_ABI_FP_SINGLE}, 2986 {"Soft float", Mips::Val_GNU_MIPS_ABI_FP_SOFT}, 2987 {"Hard float (MIPS32r2 64-bit FPU 12 callee-saved)", 2988 Mips::Val_GNU_MIPS_ABI_FP_OLD_64}, 2989 {"Hard float (32-bit CPU, Any FPU)", Mips::Val_GNU_MIPS_ABI_FP_XX}, 2990 {"Hard float (32-bit CPU, 64-bit FPU)", Mips::Val_GNU_MIPS_ABI_FP_64}, 2991 {"Hard float compat (32-bit CPU, 64-bit FPU)", 2992 Mips::Val_GNU_MIPS_ABI_FP_64A} 2993 }; 2994 2995 static const EnumEntry<unsigned> ElfMipsFlags1[] { 2996 {"ODDSPREG", Mips::AFL_FLAGS1_ODDSPREG}, 2997 }; 2998 2999 static int getMipsRegisterSize(uint8_t Flag) { 3000 switch (Flag) { 3001 case Mips::AFL_REG_NONE: 3002 return 0; 3003 case Mips::AFL_REG_32: 3004 return 32; 3005 case Mips::AFL_REG_64: 3006 return 64; 3007 case Mips::AFL_REG_128: 3008 return 128; 3009 default: 3010 return -1; 3011 } 3012 } 3013 3014 template <class ELFT> 3015 static void printMipsReginfoData(ScopedPrinter &W, 3016 const Elf_Mips_RegInfo<ELFT> &Reginfo) { 3017 W.printHex("GP", Reginfo.ri_gp_value); 3018 W.printHex("General Mask", Reginfo.ri_gprmask); 3019 W.printHex("Co-Proc Mask0", Reginfo.ri_cprmask[0]); 3020 W.printHex("Co-Proc Mask1", Reginfo.ri_cprmask[1]); 3021 W.printHex("Co-Proc Mask2", Reginfo.ri_cprmask[2]); 3022 W.printHex("Co-Proc Mask3", Reginfo.ri_cprmask[3]); 3023 } 3024 3025 template <class ELFT> void ELFDumper<ELFT>::printMipsReginfo() { 3026 const Elf_Shdr *RegInfoSec = findSectionByName(".reginfo"); 3027 if (!RegInfoSec) { 3028 W.startLine() << "There is no .reginfo section in the file.\n"; 3029 return; 3030 } 3031 3032 Expected<ArrayRef<uint8_t>> ContentsOrErr = 3033 Obj.getSectionContents(*RegInfoSec); 3034 if (!ContentsOrErr) { 3035 this->reportUniqueWarning( 3036 "unable to read the content of the .reginfo section (" + 3037 describe(*RegInfoSec) + "): " + toString(ContentsOrErr.takeError())); 3038 return; 3039 } 3040 3041 if (ContentsOrErr->size() < sizeof(Elf_Mips_RegInfo<ELFT>)) { 3042 this->reportUniqueWarning("the .reginfo section has an invalid size (0x" + 3043 Twine::utohexstr(ContentsOrErr->size()) + ")"); 3044 return; 3045 } 3046 3047 DictScope GS(W, "MIPS RegInfo"); 3048 printMipsReginfoData(W, *reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>( 3049 ContentsOrErr->data())); 3050 } 3051 3052 template <class ELFT> 3053 static Expected<const Elf_Mips_Options<ELFT> *> 3054 readMipsOptions(const uint8_t *SecBegin, ArrayRef<uint8_t> &SecData, 3055 bool &IsSupported) { 3056 if (SecData.size() < sizeof(Elf_Mips_Options<ELFT>)) 3057 return createError("the .MIPS.options section has an invalid size (0x" + 3058 Twine::utohexstr(SecData.size()) + ")"); 3059 3060 const Elf_Mips_Options<ELFT> *O = 3061 reinterpret_cast<const Elf_Mips_Options<ELFT> *>(SecData.data()); 3062 const uint8_t Size = O->size; 3063 if (Size > SecData.size()) { 3064 const uint64_t Offset = SecData.data() - SecBegin; 3065 const uint64_t SecSize = Offset + SecData.size(); 3066 return createError("a descriptor of size 0x" + Twine::utohexstr(Size) + 3067 " at offset 0x" + Twine::utohexstr(Offset) + 3068 " goes past the end of the .MIPS.options " 3069 "section of size 0x" + 3070 Twine::utohexstr(SecSize)); 3071 } 3072 3073 IsSupported = O->kind == ODK_REGINFO; 3074 const size_t ExpectedSize = 3075 sizeof(Elf_Mips_Options<ELFT>) + sizeof(Elf_Mips_RegInfo<ELFT>); 3076 3077 if (IsSupported) 3078 if (Size < ExpectedSize) 3079 return createError( 3080 "a .MIPS.options entry of kind " + 3081 Twine(getElfMipsOptionsOdkType(O->kind)) + 3082 " has an invalid size (0x" + Twine::utohexstr(Size) + 3083 "), the expected size is 0x" + Twine::utohexstr(ExpectedSize)); 3084 3085 SecData = SecData.drop_front(Size); 3086 return O; 3087 } 3088 3089 template <class ELFT> void ELFDumper<ELFT>::printMipsOptions() { 3090 const Elf_Shdr *MipsOpts = findSectionByName(".MIPS.options"); 3091 if (!MipsOpts) { 3092 W.startLine() << "There is no .MIPS.options section in the file.\n"; 3093 return; 3094 } 3095 3096 DictScope GS(W, "MIPS Options"); 3097 3098 ArrayRef<uint8_t> Data = 3099 unwrapOrError(ObjF.getFileName(), Obj.getSectionContents(*MipsOpts)); 3100 const uint8_t *const SecBegin = Data.begin(); 3101 while (!Data.empty()) { 3102 bool IsSupported; 3103 Expected<const Elf_Mips_Options<ELFT> *> OptsOrErr = 3104 readMipsOptions<ELFT>(SecBegin, Data, IsSupported); 3105 if (!OptsOrErr) { 3106 reportUniqueWarning(OptsOrErr.takeError()); 3107 break; 3108 } 3109 3110 unsigned Kind = (*OptsOrErr)->kind; 3111 const char *Type = getElfMipsOptionsOdkType(Kind); 3112 if (!IsSupported) { 3113 W.startLine() << "Unsupported MIPS options tag: " << Type << " (" << Kind 3114 << ")\n"; 3115 continue; 3116 } 3117 3118 DictScope GS(W, Type); 3119 if (Kind == ODK_REGINFO) 3120 printMipsReginfoData(W, (*OptsOrErr)->getRegInfo()); 3121 else 3122 llvm_unreachable("unexpected .MIPS.options section descriptor kind"); 3123 } 3124 } 3125 3126 template <class ELFT> void ELFDumper<ELFT>::printStackMap() const { 3127 const Elf_Shdr *StackMapSection = findSectionByName(".llvm_stackmaps"); 3128 if (!StackMapSection) 3129 return; 3130 3131 auto Warn = [&](Error &&E) { 3132 this->reportUniqueWarning("unable to read the stack map from " + 3133 describe(*StackMapSection) + ": " + 3134 toString(std::move(E))); 3135 }; 3136 3137 Expected<ArrayRef<uint8_t>> ContentOrErr = 3138 Obj.getSectionContents(*StackMapSection); 3139 if (!ContentOrErr) { 3140 Warn(ContentOrErr.takeError()); 3141 return; 3142 } 3143 3144 if (Error E = StackMapParser<ELFT::TargetEndianness>::validateHeader( 3145 *ContentOrErr)) { 3146 Warn(std::move(E)); 3147 return; 3148 } 3149 3150 prettyPrintStackMap(W, StackMapParser<ELFT::TargetEndianness>(*ContentOrErr)); 3151 } 3152 3153 template <class ELFT> 3154 void ELFDumper<ELFT>::printReloc(const Relocation<ELFT> &R, unsigned RelIndex, 3155 const Elf_Shdr &Sec, const Elf_Shdr *SymTab) { 3156 Expected<RelSymbol<ELFT>> Target = getRelocationTarget(R, SymTab); 3157 if (!Target) 3158 reportUniqueWarning("unable to print relocation " + Twine(RelIndex) + 3159 " in " + describe(Sec) + ": " + 3160 toString(Target.takeError())); 3161 else 3162 printRelRelaReloc(R, *Target); 3163 } 3164 3165 static inline void printFields(formatted_raw_ostream &OS, StringRef Str1, 3166 StringRef Str2) { 3167 OS.PadToColumn(2u); 3168 OS << Str1; 3169 OS.PadToColumn(37u); 3170 OS << Str2 << "\n"; 3171 OS.flush(); 3172 } 3173 3174 template <class ELFT> 3175 static std::string getSectionHeadersNumString(const ELFFile<ELFT> &Obj, 3176 StringRef FileName) { 3177 const typename ELFT::Ehdr &ElfHeader = Obj.getHeader(); 3178 if (ElfHeader.e_shnum != 0) 3179 return to_string(ElfHeader.e_shnum); 3180 3181 Expected<ArrayRef<typename ELFT::Shdr>> ArrOrErr = Obj.sections(); 3182 if (!ArrOrErr) { 3183 // In this case we can ignore an error, because we have already reported a 3184 // warning about the broken section header table earlier. 3185 consumeError(ArrOrErr.takeError()); 3186 return "<?>"; 3187 } 3188 3189 if (ArrOrErr->empty()) 3190 return "0"; 3191 return "0 (" + to_string((*ArrOrErr)[0].sh_size) + ")"; 3192 } 3193 3194 template <class ELFT> 3195 static std::string getSectionHeaderTableIndexString(const ELFFile<ELFT> &Obj, 3196 StringRef FileName) { 3197 const typename ELFT::Ehdr &ElfHeader = Obj.getHeader(); 3198 if (ElfHeader.e_shstrndx != SHN_XINDEX) 3199 return to_string(ElfHeader.e_shstrndx); 3200 3201 Expected<ArrayRef<typename ELFT::Shdr>> ArrOrErr = Obj.sections(); 3202 if (!ArrOrErr) { 3203 // In this case we can ignore an error, because we have already reported a 3204 // warning about the broken section header table earlier. 3205 consumeError(ArrOrErr.takeError()); 3206 return "<?>"; 3207 } 3208 3209 if (ArrOrErr->empty()) 3210 return "65535 (corrupt: out of range)"; 3211 return to_string(ElfHeader.e_shstrndx) + " (" + 3212 to_string((*ArrOrErr)[0].sh_link) + ")"; 3213 } 3214 3215 static const EnumEntry<unsigned> *getObjectFileEnumEntry(unsigned Type) { 3216 auto It = llvm::find_if(ElfObjectFileType, [&](const EnumEntry<unsigned> &E) { 3217 return E.Value == Type; 3218 }); 3219 if (It != makeArrayRef(ElfObjectFileType).end()) 3220 return It; 3221 return nullptr; 3222 } 3223 3224 template <class ELFT> void GNUELFDumper<ELFT>::printFileHeaders() { 3225 const Elf_Ehdr &e = this->Obj.getHeader(); 3226 OS << "ELF Header:\n"; 3227 OS << " Magic: "; 3228 std::string Str; 3229 for (int i = 0; i < ELF::EI_NIDENT; i++) 3230 OS << format(" %02x", static_cast<int>(e.e_ident[i])); 3231 OS << "\n"; 3232 Str = printEnum(e.e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 3233 printFields(OS, "Class:", Str); 3234 Str = printEnum(e.e_ident[ELF::EI_DATA], makeArrayRef(ElfDataEncoding)); 3235 printFields(OS, "Data:", Str); 3236 OS.PadToColumn(2u); 3237 OS << "Version:"; 3238 OS.PadToColumn(37u); 3239 OS << to_hexString(e.e_ident[ELF::EI_VERSION]); 3240 if (e.e_version == ELF::EV_CURRENT) 3241 OS << " (current)"; 3242 OS << "\n"; 3243 Str = printEnum(e.e_ident[ELF::EI_OSABI], makeArrayRef(ElfOSABI)); 3244 printFields(OS, "OS/ABI:", Str); 3245 printFields(OS, 3246 "ABI Version:", std::to_string(e.e_ident[ELF::EI_ABIVERSION])); 3247 3248 if (const EnumEntry<unsigned> *E = getObjectFileEnumEntry(e.e_type)) { 3249 Str = E->AltName.str(); 3250 } else { 3251 if (e.e_type >= ET_LOPROC) 3252 Str = "Processor Specific: (" + to_hexString(e.e_type, false) + ")"; 3253 else if (e.e_type >= ET_LOOS) 3254 Str = "OS Specific: (" + to_hexString(e.e_type, false) + ")"; 3255 else 3256 Str = "<unknown>: " + to_hexString(e.e_type, false); 3257 } 3258 printFields(OS, "Type:", Str); 3259 3260 Str = printEnum(e.e_machine, makeArrayRef(ElfMachineType)); 3261 printFields(OS, "Machine:", Str); 3262 Str = "0x" + to_hexString(e.e_version); 3263 printFields(OS, "Version:", Str); 3264 Str = "0x" + to_hexString(e.e_entry); 3265 printFields(OS, "Entry point address:", Str); 3266 Str = to_string(e.e_phoff) + " (bytes into file)"; 3267 printFields(OS, "Start of program headers:", Str); 3268 Str = to_string(e.e_shoff) + " (bytes into file)"; 3269 printFields(OS, "Start of section headers:", Str); 3270 std::string ElfFlags; 3271 if (e.e_machine == EM_MIPS) 3272 ElfFlags = 3273 printFlags(e.e_flags, makeArrayRef(ElfHeaderMipsFlags), 3274 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 3275 unsigned(ELF::EF_MIPS_MACH)); 3276 else if (e.e_machine == EM_RISCV) 3277 ElfFlags = printFlags(e.e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 3278 else if (e.e_machine == EM_AVR) 3279 ElfFlags = printFlags(e.e_flags, makeArrayRef(ElfHeaderAVRFlags), 3280 unsigned(ELF::EF_AVR_ARCH_MASK)); 3281 Str = "0x" + to_hexString(e.e_flags); 3282 if (!ElfFlags.empty()) 3283 Str = Str + ", " + ElfFlags; 3284 printFields(OS, "Flags:", Str); 3285 Str = to_string(e.e_ehsize) + " (bytes)"; 3286 printFields(OS, "Size of this header:", Str); 3287 Str = to_string(e.e_phentsize) + " (bytes)"; 3288 printFields(OS, "Size of program headers:", Str); 3289 Str = to_string(e.e_phnum); 3290 printFields(OS, "Number of program headers:", Str); 3291 Str = to_string(e.e_shentsize) + " (bytes)"; 3292 printFields(OS, "Size of section headers:", Str); 3293 Str = getSectionHeadersNumString(this->Obj, this->FileName); 3294 printFields(OS, "Number of section headers:", Str); 3295 Str = getSectionHeaderTableIndexString(this->Obj, this->FileName); 3296 printFields(OS, "Section header string table index:", Str); 3297 } 3298 3299 template <class ELFT> std::vector<GroupSection> ELFDumper<ELFT>::getGroups() { 3300 auto GetSignature = [&](const Elf_Sym &Sym, unsigned SymNdx, 3301 const Elf_Shdr &Symtab) -> StringRef { 3302 Expected<StringRef> StrTableOrErr = Obj.getStringTableForSymtab(Symtab); 3303 if (!StrTableOrErr) { 3304 reportUniqueWarning("unable to get the string table for " + 3305 describe(Symtab) + ": " + 3306 toString(StrTableOrErr.takeError())); 3307 return "<?>"; 3308 } 3309 3310 StringRef Strings = *StrTableOrErr; 3311 if (Sym.st_name >= Strings.size()) { 3312 reportUniqueWarning("unable to get the name of the symbol with index " + 3313 Twine(SymNdx) + ": st_name (0x" + 3314 Twine::utohexstr(Sym.st_name) + 3315 ") is past the end of the string table of size 0x" + 3316 Twine::utohexstr(Strings.size())); 3317 return "<?>"; 3318 } 3319 3320 return StrTableOrErr->data() + Sym.st_name; 3321 }; 3322 3323 std::vector<GroupSection> Ret; 3324 uint64_t I = 0; 3325 for (const Elf_Shdr &Sec : cantFail(Obj.sections())) { 3326 ++I; 3327 if (Sec.sh_type != ELF::SHT_GROUP) 3328 continue; 3329 3330 StringRef Signature = "<?>"; 3331 if (Expected<const Elf_Shdr *> SymtabOrErr = Obj.getSection(Sec.sh_link)) { 3332 if (Expected<const Elf_Sym *> SymOrErr = 3333 Obj.template getEntry<Elf_Sym>(**SymtabOrErr, Sec.sh_info)) 3334 Signature = GetSignature(**SymOrErr, Sec.sh_info, **SymtabOrErr); 3335 else 3336 reportUniqueWarning("unable to get the signature symbol for " + 3337 describe(Sec) + ": " + 3338 toString(SymOrErr.takeError())); 3339 } else { 3340 reportUniqueWarning("unable to get the symbol table for " + 3341 describe(Sec) + ": " + 3342 toString(SymtabOrErr.takeError())); 3343 } 3344 3345 ArrayRef<Elf_Word> Data; 3346 if (Expected<ArrayRef<Elf_Word>> ContentsOrErr = 3347 Obj.template getSectionContentsAsArray<Elf_Word>(Sec)) { 3348 if (ContentsOrErr->empty()) 3349 reportUniqueWarning("unable to read the section group flag from the " + 3350 describe(Sec) + ": the section is empty"); 3351 else 3352 Data = *ContentsOrErr; 3353 } else { 3354 reportUniqueWarning("unable to get the content of the " + describe(Sec) + 3355 ": " + toString(ContentsOrErr.takeError())); 3356 } 3357 3358 Ret.push_back({getPrintableSectionName(Sec), 3359 maybeDemangle(Signature), 3360 Sec.sh_name, 3361 I - 1, 3362 Sec.sh_link, 3363 Sec.sh_info, 3364 Data.empty() ? Elf_Word(0) : Data[0], 3365 {}}); 3366 3367 if (Data.empty()) 3368 continue; 3369 3370 std::vector<GroupMember> &GM = Ret.back().Members; 3371 for (uint32_t Ndx : Data.slice(1)) { 3372 if (Expected<const Elf_Shdr *> SecOrErr = Obj.getSection(Ndx)) { 3373 GM.push_back({getPrintableSectionName(**SecOrErr), Ndx}); 3374 } else { 3375 reportUniqueWarning("unable to get the section with index " + 3376 Twine(Ndx) + " when dumping the " + describe(Sec) + 3377 ": " + toString(SecOrErr.takeError())); 3378 GM.push_back({"<?>", Ndx}); 3379 } 3380 } 3381 } 3382 return Ret; 3383 } 3384 3385 static DenseMap<uint64_t, const GroupSection *> 3386 mapSectionsToGroups(ArrayRef<GroupSection> Groups) { 3387 DenseMap<uint64_t, const GroupSection *> Ret; 3388 for (const GroupSection &G : Groups) 3389 for (const GroupMember &GM : G.Members) 3390 Ret.insert({GM.Index, &G}); 3391 return Ret; 3392 } 3393 3394 template <class ELFT> void GNUELFDumper<ELFT>::printGroupSections() { 3395 std::vector<GroupSection> V = this->getGroups(); 3396 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 3397 for (const GroupSection &G : V) { 3398 OS << "\n" 3399 << getGroupType(G.Type) << " group section [" 3400 << format_decimal(G.Index, 5) << "] `" << G.Name << "' [" << G.Signature 3401 << "] contains " << G.Members.size() << " sections:\n" 3402 << " [Index] Name\n"; 3403 for (const GroupMember &GM : G.Members) { 3404 const GroupSection *MainGroup = Map[GM.Index]; 3405 if (MainGroup != &G) 3406 this->reportUniqueWarning( 3407 "section with index " + Twine(GM.Index) + 3408 ", included in the group section with index " + 3409 Twine(MainGroup->Index) + 3410 ", was also found in the group section with index " + 3411 Twine(G.Index)); 3412 OS << " [" << format_decimal(GM.Index, 5) << "] " << GM.Name << "\n"; 3413 } 3414 } 3415 3416 if (V.empty()) 3417 OS << "There are no section groups in this file.\n"; 3418 } 3419 3420 template <class ELFT> 3421 void GNUELFDumper<ELFT>::printRelrReloc(const Elf_Relr &R) { 3422 OS << to_string(format_hex_no_prefix(R, ELFT::Is64Bits ? 16 : 8)) << "\n"; 3423 } 3424 3425 template <class ELFT> 3426 void GNUELFDumper<ELFT>::printRelRelaReloc(const Relocation<ELFT> &R, 3427 const RelSymbol<ELFT> &RelSym) { 3428 // First two fields are bit width dependent. The rest of them are fixed width. 3429 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3430 Field Fields[5] = {0, 10 + Bias, 19 + 2 * Bias, 42 + 2 * Bias, 53 + 2 * Bias}; 3431 unsigned Width = ELFT::Is64Bits ? 16 : 8; 3432 3433 Fields[0].Str = to_string(format_hex_no_prefix(R.Offset, Width)); 3434 Fields[1].Str = to_string(format_hex_no_prefix(R.Info, Width)); 3435 3436 SmallString<32> RelocName; 3437 this->Obj.getRelocationTypeName(R.Type, RelocName); 3438 Fields[2].Str = RelocName.c_str(); 3439 3440 if (RelSym.Sym) 3441 Fields[3].Str = 3442 to_string(format_hex_no_prefix(RelSym.Sym->getValue(), Width)); 3443 3444 Fields[4].Str = std::string(RelSym.Name); 3445 for (const Field &F : Fields) 3446 printField(F); 3447 3448 std::string Addend; 3449 if (Optional<int64_t> A = R.Addend) { 3450 int64_t RelAddend = *A; 3451 if (!RelSym.Name.empty()) { 3452 if (RelAddend < 0) { 3453 Addend = " - "; 3454 RelAddend = std::abs(RelAddend); 3455 } else { 3456 Addend = " + "; 3457 } 3458 } 3459 Addend += to_hexString(RelAddend, false); 3460 } 3461 OS << Addend << "\n"; 3462 } 3463 3464 template <class ELFT> 3465 static void printRelocHeaderFields(formatted_raw_ostream &OS, unsigned SType) { 3466 bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA; 3467 bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR; 3468 if (ELFT::Is64Bits) 3469 OS << " "; 3470 else 3471 OS << " "; 3472 if (IsRelr && opts::RawRelr) 3473 OS << "Data "; 3474 else 3475 OS << "Offset"; 3476 if (ELFT::Is64Bits) 3477 OS << " Info Type" 3478 << " Symbol's Value Symbol's Name"; 3479 else 3480 OS << " Info Type Sym. Value Symbol's Name"; 3481 if (IsRela) 3482 OS << " + Addend"; 3483 OS << "\n"; 3484 } 3485 3486 template <class ELFT> 3487 void GNUELFDumper<ELFT>::printDynamicRelocHeader(unsigned Type, StringRef Name, 3488 const DynRegionInfo &Reg) { 3489 uint64_t Offset = Reg.Addr - this->Obj.base(); 3490 OS << "\n'" << Name.str().c_str() << "' relocation section at offset 0x" 3491 << to_hexString(Offset, false) << " contains " << Reg.Size << " bytes:\n"; 3492 printRelocHeaderFields<ELFT>(OS, Type); 3493 } 3494 3495 template <class ELFT> 3496 static bool isRelocationSec(const typename ELFT::Shdr &Sec) { 3497 return Sec.sh_type == ELF::SHT_REL || Sec.sh_type == ELF::SHT_RELA || 3498 Sec.sh_type == ELF::SHT_RELR || Sec.sh_type == ELF::SHT_ANDROID_REL || 3499 Sec.sh_type == ELF::SHT_ANDROID_RELA || 3500 Sec.sh_type == ELF::SHT_ANDROID_RELR; 3501 } 3502 3503 template <class ELFT> void GNUELFDumper<ELFT>::printRelocations() { 3504 auto GetEntriesNum = [&](const Elf_Shdr &Sec) -> Expected<size_t> { 3505 // Android's packed relocation section needs to be unpacked first 3506 // to get the actual number of entries. 3507 if (Sec.sh_type == ELF::SHT_ANDROID_REL || 3508 Sec.sh_type == ELF::SHT_ANDROID_RELA) { 3509 Expected<std::vector<typename ELFT::Rela>> RelasOrErr = 3510 this->Obj.android_relas(Sec); 3511 if (!RelasOrErr) 3512 return RelasOrErr.takeError(); 3513 return RelasOrErr->size(); 3514 } 3515 3516 if (!opts::RawRelr && (Sec.sh_type == ELF::SHT_RELR || 3517 Sec.sh_type == ELF::SHT_ANDROID_RELR)) { 3518 Expected<Elf_Relr_Range> RelrsOrErr = this->Obj.relrs(Sec); 3519 if (!RelrsOrErr) 3520 return RelrsOrErr.takeError(); 3521 return this->Obj.decode_relrs(*RelrsOrErr).size(); 3522 } 3523 3524 return Sec.getEntityCount(); 3525 }; 3526 3527 bool HasRelocSections = false; 3528 for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) { 3529 if (!isRelocationSec<ELFT>(Sec)) 3530 continue; 3531 HasRelocSections = true; 3532 3533 std::string EntriesNum = "<?>"; 3534 if (Expected<size_t> NumOrErr = GetEntriesNum(Sec)) 3535 EntriesNum = std::to_string(*NumOrErr); 3536 else 3537 this->reportUniqueWarning("unable to get the number of relocations in " + 3538 this->describe(Sec) + ": " + 3539 toString(NumOrErr.takeError())); 3540 3541 uintX_t Offset = Sec.sh_offset; 3542 StringRef Name = this->getPrintableSectionName(Sec); 3543 OS << "\nRelocation section '" << Name << "' at offset 0x" 3544 << to_hexString(Offset, false) << " contains " << EntriesNum 3545 << " entries:\n"; 3546 printRelocHeaderFields<ELFT>(OS, Sec.sh_type); 3547 this->printRelocationsHelper(Sec); 3548 } 3549 if (!HasRelocSections) 3550 OS << "\nThere are no relocations in this file.\n"; 3551 } 3552 3553 // Print the offset of a particular section from anyone of the ranges: 3554 // [SHT_LOOS, SHT_HIOS], [SHT_LOPROC, SHT_HIPROC], [SHT_LOUSER, SHT_HIUSER]. 3555 // If 'Type' does not fall within any of those ranges, then a string is 3556 // returned as '<unknown>' followed by the type value. 3557 static std::string getSectionTypeOffsetString(unsigned Type) { 3558 if (Type >= SHT_LOOS && Type <= SHT_HIOS) 3559 return "LOOS+0x" + to_hexString(Type - SHT_LOOS); 3560 else if (Type >= SHT_LOPROC && Type <= SHT_HIPROC) 3561 return "LOPROC+0x" + to_hexString(Type - SHT_LOPROC); 3562 else if (Type >= SHT_LOUSER && Type <= SHT_HIUSER) 3563 return "LOUSER+0x" + to_hexString(Type - SHT_LOUSER); 3564 return "0x" + to_hexString(Type) + ": <unknown>"; 3565 } 3566 3567 static std::string getSectionTypeString(unsigned Machine, unsigned Type) { 3568 StringRef Name = getELFSectionTypeName(Machine, Type); 3569 3570 // Handle SHT_GNU_* type names. 3571 if (Name.startswith("SHT_GNU_")) { 3572 if (Name == "SHT_GNU_HASH") 3573 return "GNU_HASH"; 3574 // E.g. SHT_GNU_verneed -> VERNEED. 3575 return Name.drop_front(8).upper(); 3576 } 3577 3578 if (Name == "SHT_SYMTAB_SHNDX") 3579 return "SYMTAB SECTION INDICES"; 3580 3581 if (Name.startswith("SHT_")) 3582 return Name.drop_front(4).str(); 3583 return getSectionTypeOffsetString(Type); 3584 } 3585 3586 static void printSectionDescription(formatted_raw_ostream &OS, 3587 unsigned EMachine) { 3588 OS << "Key to Flags:\n"; 3589 OS << " W (write), A (alloc), X (execute), M (merge), S (strings), I " 3590 "(info),\n"; 3591 OS << " L (link order), O (extra OS processing required), G (group), T " 3592 "(TLS),\n"; 3593 OS << " C (compressed), x (unknown), o (OS specific), E (exclude),\n"; 3594 OS << " R (retain)"; 3595 3596 if (EMachine == EM_X86_64) 3597 OS << ", l (large)"; 3598 else if (EMachine == EM_ARM) 3599 OS << ", y (purecode)"; 3600 3601 OS << ", p (processor specific)\n"; 3602 } 3603 3604 template <class ELFT> void GNUELFDumper<ELFT>::printSectionHeaders() { 3605 unsigned Bias = ELFT::Is64Bits ? 0 : 8; 3606 ArrayRef<Elf_Shdr> Sections = cantFail(this->Obj.sections()); 3607 OS << "There are " << to_string(Sections.size()) 3608 << " section headers, starting at offset " 3609 << "0x" << to_hexString(this->Obj.getHeader().e_shoff, false) << ":\n\n"; 3610 OS << "Section Headers:\n"; 3611 Field Fields[11] = { 3612 {"[Nr]", 2}, {"Name", 7}, {"Type", 25}, 3613 {"Address", 41}, {"Off", 58 - Bias}, {"Size", 65 - Bias}, 3614 {"ES", 72 - Bias}, {"Flg", 75 - Bias}, {"Lk", 79 - Bias}, 3615 {"Inf", 82 - Bias}, {"Al", 86 - Bias}}; 3616 for (const Field &F : Fields) 3617 printField(F); 3618 OS << "\n"; 3619 3620 StringRef SecStrTable; 3621 if (Expected<StringRef> SecStrTableOrErr = 3622 this->Obj.getSectionStringTable(Sections, this->WarningHandler)) 3623 SecStrTable = *SecStrTableOrErr; 3624 else 3625 this->reportUniqueWarning(SecStrTableOrErr.takeError()); 3626 3627 size_t SectionIndex = 0; 3628 for (const Elf_Shdr &Sec : Sections) { 3629 Fields[0].Str = to_string(SectionIndex); 3630 if (SecStrTable.empty()) 3631 Fields[1].Str = "<no-strings>"; 3632 else 3633 Fields[1].Str = std::string(unwrapOrError<StringRef>( 3634 this->FileName, this->Obj.getSectionName(Sec, SecStrTable))); 3635 Fields[2].Str = 3636 getSectionTypeString(this->Obj.getHeader().e_machine, Sec.sh_type); 3637 Fields[3].Str = 3638 to_string(format_hex_no_prefix(Sec.sh_addr, ELFT::Is64Bits ? 16 : 8)); 3639 Fields[4].Str = to_string(format_hex_no_prefix(Sec.sh_offset, 6)); 3640 Fields[5].Str = to_string(format_hex_no_prefix(Sec.sh_size, 6)); 3641 Fields[6].Str = to_string(format_hex_no_prefix(Sec.sh_entsize, 2)); 3642 Fields[7].Str = getGNUFlags(this->Obj.getHeader().e_machine, Sec.sh_flags); 3643 Fields[8].Str = to_string(Sec.sh_link); 3644 Fields[9].Str = to_string(Sec.sh_info); 3645 Fields[10].Str = to_string(Sec.sh_addralign); 3646 3647 OS.PadToColumn(Fields[0].Column); 3648 OS << "[" << right_justify(Fields[0].Str, 2) << "]"; 3649 for (int i = 1; i < 7; i++) 3650 printField(Fields[i]); 3651 OS.PadToColumn(Fields[7].Column); 3652 OS << right_justify(Fields[7].Str, 3); 3653 OS.PadToColumn(Fields[8].Column); 3654 OS << right_justify(Fields[8].Str, 2); 3655 OS.PadToColumn(Fields[9].Column); 3656 OS << right_justify(Fields[9].Str, 3); 3657 OS.PadToColumn(Fields[10].Column); 3658 OS << right_justify(Fields[10].Str, 2); 3659 OS << "\n"; 3660 ++SectionIndex; 3661 } 3662 printSectionDescription(OS, this->Obj.getHeader().e_machine); 3663 } 3664 3665 template <class ELFT> 3666 void GNUELFDumper<ELFT>::printSymtabMessage(const Elf_Shdr *Symtab, 3667 size_t Entries, 3668 bool NonVisibilityBitsUsed) const { 3669 StringRef Name; 3670 if (Symtab) 3671 Name = this->getPrintableSectionName(*Symtab); 3672 if (!Name.empty()) 3673 OS << "\nSymbol table '" << Name << "'"; 3674 else 3675 OS << "\nSymbol table for image"; 3676 OS << " contains " << Entries << " entries:\n"; 3677 3678 if (ELFT::Is64Bits) 3679 OS << " Num: Value Size Type Bind Vis"; 3680 else 3681 OS << " Num: Value Size Type Bind Vis"; 3682 3683 if (NonVisibilityBitsUsed) 3684 OS << " "; 3685 OS << " Ndx Name\n"; 3686 } 3687 3688 template <class ELFT> 3689 std::string 3690 GNUELFDumper<ELFT>::getSymbolSectionNdx(const Elf_Sym &Symbol, 3691 unsigned SymIndex, 3692 DataRegion<Elf_Word> ShndxTable) const { 3693 unsigned SectionIndex = Symbol.st_shndx; 3694 switch (SectionIndex) { 3695 case ELF::SHN_UNDEF: 3696 return "UND"; 3697 case ELF::SHN_ABS: 3698 return "ABS"; 3699 case ELF::SHN_COMMON: 3700 return "COM"; 3701 case ELF::SHN_XINDEX: { 3702 Expected<uint32_t> IndexOrErr = 3703 object::getExtendedSymbolTableIndex<ELFT>(Symbol, SymIndex, ShndxTable); 3704 if (!IndexOrErr) { 3705 assert(Symbol.st_shndx == SHN_XINDEX && 3706 "getExtendedSymbolTableIndex should only fail due to an invalid " 3707 "SHT_SYMTAB_SHNDX table/reference"); 3708 this->reportUniqueWarning(IndexOrErr.takeError()); 3709 return "RSV[0xffff]"; 3710 } 3711 return to_string(format_decimal(*IndexOrErr, 3)); 3712 } 3713 default: 3714 // Find if: 3715 // Processor specific 3716 if (SectionIndex >= ELF::SHN_LOPROC && SectionIndex <= ELF::SHN_HIPROC) 3717 return std::string("PRC[0x") + 3718 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3719 // OS specific 3720 if (SectionIndex >= ELF::SHN_LOOS && SectionIndex <= ELF::SHN_HIOS) 3721 return std::string("OS[0x") + 3722 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3723 // Architecture reserved: 3724 if (SectionIndex >= ELF::SHN_LORESERVE && 3725 SectionIndex <= ELF::SHN_HIRESERVE) 3726 return std::string("RSV[0x") + 3727 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3728 // A normal section with an index 3729 return to_string(format_decimal(SectionIndex, 3)); 3730 } 3731 } 3732 3733 template <class ELFT> 3734 void GNUELFDumper<ELFT>::printSymbol(const Elf_Sym &Symbol, unsigned SymIndex, 3735 DataRegion<Elf_Word> ShndxTable, 3736 Optional<StringRef> StrTable, 3737 bool IsDynamic, 3738 bool NonVisibilityBitsUsed) const { 3739 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3740 Field Fields[8] = {0, 8, 17 + Bias, 23 + Bias, 3741 31 + Bias, 38 + Bias, 48 + Bias, 51 + Bias}; 3742 Fields[0].Str = to_string(format_decimal(SymIndex, 6)) + ":"; 3743 Fields[1].Str = 3744 to_string(format_hex_no_prefix(Symbol.st_value, ELFT::Is64Bits ? 16 : 8)); 3745 Fields[2].Str = to_string(format_decimal(Symbol.st_size, 5)); 3746 3747 unsigned char SymbolType = Symbol.getType(); 3748 if (this->Obj.getHeader().e_machine == ELF::EM_AMDGPU && 3749 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3750 Fields[3].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3751 else 3752 Fields[3].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3753 3754 Fields[4].Str = 3755 printEnum(Symbol.getBinding(), makeArrayRef(ElfSymbolBindings)); 3756 Fields[5].Str = 3757 printEnum(Symbol.getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3758 3759 if (Symbol.st_other & ~0x3) { 3760 if (this->Obj.getHeader().e_machine == ELF::EM_AARCH64) { 3761 uint8_t Other = Symbol.st_other & ~0x3; 3762 if (Other & STO_AARCH64_VARIANT_PCS) { 3763 Other &= ~STO_AARCH64_VARIANT_PCS; 3764 Fields[5].Str += " [VARIANT_PCS"; 3765 if (Other != 0) 3766 Fields[5].Str.append(" | " + to_hexString(Other, false)); 3767 Fields[5].Str.append("]"); 3768 } 3769 } else { 3770 Fields[5].Str += 3771 " [<other: " + to_string(format_hex(Symbol.st_other, 2)) + ">]"; 3772 } 3773 } 3774 3775 Fields[6].Column += NonVisibilityBitsUsed ? 13 : 0; 3776 Fields[6].Str = getSymbolSectionNdx(Symbol, SymIndex, ShndxTable); 3777 3778 Fields[7].Str = this->getFullSymbolName(Symbol, SymIndex, ShndxTable, 3779 StrTable, IsDynamic); 3780 for (const Field &Entry : Fields) 3781 printField(Entry); 3782 OS << "\n"; 3783 } 3784 3785 template <class ELFT> 3786 void GNUELFDumper<ELFT>::printHashedSymbol(const Elf_Sym *Symbol, 3787 unsigned SymIndex, 3788 DataRegion<Elf_Word> ShndxTable, 3789 StringRef StrTable, 3790 uint32_t Bucket) { 3791 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3792 Field Fields[9] = {0, 6, 11, 20 + Bias, 25 + Bias, 3793 34 + Bias, 41 + Bias, 49 + Bias, 53 + Bias}; 3794 Fields[0].Str = to_string(format_decimal(SymIndex, 5)); 3795 Fields[1].Str = to_string(format_decimal(Bucket, 3)) + ":"; 3796 3797 Fields[2].Str = to_string( 3798 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3799 Fields[3].Str = to_string(format_decimal(Symbol->st_size, 5)); 3800 3801 unsigned char SymbolType = Symbol->getType(); 3802 if (this->Obj.getHeader().e_machine == ELF::EM_AMDGPU && 3803 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3804 Fields[4].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3805 else 3806 Fields[4].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3807 3808 Fields[5].Str = 3809 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3810 Fields[6].Str = 3811 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3812 Fields[7].Str = getSymbolSectionNdx(*Symbol, SymIndex, ShndxTable); 3813 Fields[8].Str = 3814 this->getFullSymbolName(*Symbol, SymIndex, ShndxTable, StrTable, true); 3815 3816 for (const Field &Entry : Fields) 3817 printField(Entry); 3818 OS << "\n"; 3819 } 3820 3821 template <class ELFT> 3822 void GNUELFDumper<ELFT>::printSymbols(bool PrintSymbols, 3823 bool PrintDynamicSymbols) { 3824 if (!PrintSymbols && !PrintDynamicSymbols) 3825 return; 3826 // GNU readelf prints both the .dynsym and .symtab with --symbols. 3827 this->printSymbolsHelper(true); 3828 if (PrintSymbols) 3829 this->printSymbolsHelper(false); 3830 } 3831 3832 template <class ELFT> 3833 void GNUELFDumper<ELFT>::printHashTableSymbols(const Elf_Hash &SysVHash) { 3834 if (this->DynamicStringTable.empty()) 3835 return; 3836 3837 if (ELFT::Is64Bits) 3838 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3839 else 3840 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3841 OS << "\n"; 3842 3843 Elf_Sym_Range DynSyms = this->dynamic_symbols(); 3844 const Elf_Sym *FirstSym = DynSyms.empty() ? nullptr : &DynSyms[0]; 3845 if (!FirstSym) { 3846 this->reportUniqueWarning( 3847 Twine("unable to print symbols for the .hash table: the " 3848 "dynamic symbol table ") + 3849 (this->DynSymRegion ? "is empty" : "was not found")); 3850 return; 3851 } 3852 3853 DataRegion<Elf_Word> ShndxTable( 3854 (const Elf_Word *)this->DynSymTabShndxRegion.Addr, this->Obj.end()); 3855 auto Buckets = SysVHash.buckets(); 3856 auto Chains = SysVHash.chains(); 3857 for (uint32_t Buc = 0; Buc < SysVHash.nbucket; Buc++) { 3858 if (Buckets[Buc] == ELF::STN_UNDEF) 3859 continue; 3860 std::vector<bool> Visited(SysVHash.nchain); 3861 for (uint32_t Ch = Buckets[Buc]; Ch < SysVHash.nchain; Ch = Chains[Ch]) { 3862 if (Ch == ELF::STN_UNDEF) 3863 break; 3864 3865 if (Visited[Ch]) { 3866 this->reportUniqueWarning(".hash section is invalid: bucket " + 3867 Twine(Ch) + 3868 ": a cycle was detected in the linked chain"); 3869 break; 3870 } 3871 3872 printHashedSymbol(FirstSym + Ch, Ch, ShndxTable, this->DynamicStringTable, 3873 Buc); 3874 Visited[Ch] = true; 3875 } 3876 } 3877 } 3878 3879 template <class ELFT> 3880 void GNUELFDumper<ELFT>::printGnuHashTableSymbols(const Elf_GnuHash &GnuHash) { 3881 if (this->DynamicStringTable.empty()) 3882 return; 3883 3884 Elf_Sym_Range DynSyms = this->dynamic_symbols(); 3885 const Elf_Sym *FirstSym = DynSyms.empty() ? nullptr : &DynSyms[0]; 3886 if (!FirstSym) { 3887 this->reportUniqueWarning( 3888 Twine("unable to print symbols for the .gnu.hash table: the " 3889 "dynamic symbol table ") + 3890 (this->DynSymRegion ? "is empty" : "was not found")); 3891 return; 3892 } 3893 3894 auto GetSymbol = [&](uint64_t SymIndex, 3895 uint64_t SymsTotal) -> const Elf_Sym * { 3896 if (SymIndex >= SymsTotal) { 3897 this->reportUniqueWarning( 3898 "unable to print hashed symbol with index " + Twine(SymIndex) + 3899 ", which is greater than or equal to the number of dynamic symbols " 3900 "(" + 3901 Twine::utohexstr(SymsTotal) + ")"); 3902 return nullptr; 3903 } 3904 return FirstSym + SymIndex; 3905 }; 3906 3907 Expected<ArrayRef<Elf_Word>> ValuesOrErr = 3908 getGnuHashTableChains<ELFT>(this->DynSymRegion, &GnuHash); 3909 ArrayRef<Elf_Word> Values; 3910 if (!ValuesOrErr) 3911 this->reportUniqueWarning("unable to get hash values for the SHT_GNU_HASH " 3912 "section: " + 3913 toString(ValuesOrErr.takeError())); 3914 else 3915 Values = *ValuesOrErr; 3916 3917 DataRegion<Elf_Word> ShndxTable( 3918 (const Elf_Word *)this->DynSymTabShndxRegion.Addr, this->Obj.end()); 3919 ArrayRef<Elf_Word> Buckets = GnuHash.buckets(); 3920 for (uint32_t Buc = 0; Buc < GnuHash.nbuckets; Buc++) { 3921 if (Buckets[Buc] == ELF::STN_UNDEF) 3922 continue; 3923 uint32_t Index = Buckets[Buc]; 3924 // Print whole chain. 3925 while (true) { 3926 uint32_t SymIndex = Index++; 3927 if (const Elf_Sym *Sym = GetSymbol(SymIndex, DynSyms.size())) 3928 printHashedSymbol(Sym, SymIndex, ShndxTable, this->DynamicStringTable, 3929 Buc); 3930 else 3931 break; 3932 3933 if (SymIndex < GnuHash.symndx) { 3934 this->reportUniqueWarning( 3935 "unable to read the hash value for symbol with index " + 3936 Twine(SymIndex) + 3937 ", which is less than the index of the first hashed symbol (" + 3938 Twine(GnuHash.symndx) + ")"); 3939 break; 3940 } 3941 3942 // Chain ends at symbol with stopper bit. 3943 if ((Values[SymIndex - GnuHash.symndx] & 1) == 1) 3944 break; 3945 } 3946 } 3947 } 3948 3949 template <class ELFT> void GNUELFDumper<ELFT>::printHashSymbols() { 3950 if (this->HashTable) { 3951 OS << "\n Symbol table of .hash for image:\n"; 3952 if (Error E = checkHashTable<ELFT>(*this, this->HashTable)) 3953 this->reportUniqueWarning(std::move(E)); 3954 else 3955 printHashTableSymbols(*this->HashTable); 3956 } 3957 3958 // Try printing the .gnu.hash table. 3959 if (this->GnuHashTable) { 3960 OS << "\n Symbol table of .gnu.hash for image:\n"; 3961 if (ELFT::Is64Bits) 3962 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3963 else 3964 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3965 OS << "\n"; 3966 3967 if (Error E = checkGNUHashTable<ELFT>(this->Obj, this->GnuHashTable)) 3968 this->reportUniqueWarning(std::move(E)); 3969 else 3970 printGnuHashTableSymbols(*this->GnuHashTable); 3971 } 3972 } 3973 3974 template <class ELFT> void GNUELFDumper<ELFT>::printSectionDetails() { 3975 ArrayRef<Elf_Shdr> Sections = cantFail(this->Obj.sections()); 3976 OS << "There are " << to_string(Sections.size()) 3977 << " section headers, starting at offset " 3978 << "0x" << to_hexString(this->Obj.getHeader().e_shoff, false) << ":\n\n"; 3979 3980 OS << "Section Headers:\n"; 3981 3982 auto PrintFields = [&](ArrayRef<Field> V) { 3983 for (const Field &F : V) 3984 printField(F); 3985 OS << "\n"; 3986 }; 3987 3988 PrintFields({{"[Nr]", 2}, {"Name", 7}}); 3989 3990 constexpr bool Is64 = ELFT::Is64Bits; 3991 PrintFields({{"Type", 7}, 3992 {Is64 ? "Address" : "Addr", 23}, 3993 {"Off", Is64 ? 40 : 32}, 3994 {"Size", Is64 ? 47 : 39}, 3995 {"ES", Is64 ? 54 : 46}, 3996 {"Lk", Is64 ? 59 : 51}, 3997 {"Inf", Is64 ? 62 : 54}, 3998 {"Al", Is64 ? 66 : 57}}); 3999 PrintFields({{"Flags", 7}}); 4000 4001 StringRef SecStrTable; 4002 if (Expected<StringRef> SecStrTableOrErr = 4003 this->Obj.getSectionStringTable(Sections, this->WarningHandler)) 4004 SecStrTable = *SecStrTableOrErr; 4005 else 4006 this->reportUniqueWarning(SecStrTableOrErr.takeError()); 4007 4008 size_t SectionIndex = 0; 4009 const unsigned AddrSize = Is64 ? 16 : 8; 4010 for (const Elf_Shdr &S : Sections) { 4011 StringRef Name = "<?>"; 4012 if (Expected<StringRef> NameOrErr = 4013 this->Obj.getSectionName(S, SecStrTable)) 4014 Name = *NameOrErr; 4015 else 4016 this->reportUniqueWarning(NameOrErr.takeError()); 4017 4018 OS.PadToColumn(2); 4019 OS << "[" << right_justify(to_string(SectionIndex), 2) << "]"; 4020 PrintFields({{Name, 7}}); 4021 PrintFields( 4022 {{getSectionTypeString(this->Obj.getHeader().e_machine, S.sh_type), 7}, 4023 {to_string(format_hex_no_prefix(S.sh_addr, AddrSize)), 23}, 4024 {to_string(format_hex_no_prefix(S.sh_offset, 6)), Is64 ? 39 : 32}, 4025 {to_string(format_hex_no_prefix(S.sh_size, 6)), Is64 ? 47 : 39}, 4026 {to_string(format_hex_no_prefix(S.sh_entsize, 2)), Is64 ? 54 : 46}, 4027 {to_string(S.sh_link), Is64 ? 59 : 51}, 4028 {to_string(S.sh_info), Is64 ? 63 : 55}, 4029 {to_string(S.sh_addralign), Is64 ? 66 : 58}}); 4030 4031 OS.PadToColumn(7); 4032 OS << "[" << to_string(format_hex_no_prefix(S.sh_flags, AddrSize)) << "]: "; 4033 4034 DenseMap<unsigned, StringRef> FlagToName = { 4035 {SHF_WRITE, "WRITE"}, {SHF_ALLOC, "ALLOC"}, 4036 {SHF_EXECINSTR, "EXEC"}, {SHF_MERGE, "MERGE"}, 4037 {SHF_STRINGS, "STRINGS"}, {SHF_INFO_LINK, "INFO LINK"}, 4038 {SHF_LINK_ORDER, "LINK ORDER"}, {SHF_OS_NONCONFORMING, "OS NONCONF"}, 4039 {SHF_GROUP, "GROUP"}, {SHF_TLS, "TLS"}, 4040 {SHF_COMPRESSED, "COMPRESSED"}, {SHF_EXCLUDE, "EXCLUDE"}}; 4041 4042 uint64_t Flags = S.sh_flags; 4043 uint64_t UnknownFlags = 0; 4044 ListSeparator LS; 4045 while (Flags) { 4046 // Take the least significant bit as a flag. 4047 uint64_t Flag = Flags & -Flags; 4048 Flags -= Flag; 4049 4050 auto It = FlagToName.find(Flag); 4051 if (It != FlagToName.end()) 4052 OS << LS << It->second; 4053 else 4054 UnknownFlags |= Flag; 4055 } 4056 4057 auto PrintUnknownFlags = [&](uint64_t Mask, StringRef Name) { 4058 uint64_t FlagsToPrint = UnknownFlags & Mask; 4059 if (!FlagsToPrint) 4060 return; 4061 4062 OS << LS << Name << " (" 4063 << to_string(format_hex_no_prefix(FlagsToPrint, AddrSize)) << ")"; 4064 UnknownFlags &= ~Mask; 4065 }; 4066 4067 PrintUnknownFlags(SHF_MASKOS, "OS"); 4068 PrintUnknownFlags(SHF_MASKPROC, "PROC"); 4069 PrintUnknownFlags(uint64_t(-1), "UNKNOWN"); 4070 4071 OS << "\n"; 4072 ++SectionIndex; 4073 } 4074 } 4075 4076 static inline std::string printPhdrFlags(unsigned Flag) { 4077 std::string Str; 4078 Str = (Flag & PF_R) ? "R" : " "; 4079 Str += (Flag & PF_W) ? "W" : " "; 4080 Str += (Flag & PF_X) ? "E" : " "; 4081 return Str; 4082 } 4083 4084 template <class ELFT> 4085 static bool checkTLSSections(const typename ELFT::Phdr &Phdr, 4086 const typename ELFT::Shdr &Sec) { 4087 if (Sec.sh_flags & ELF::SHF_TLS) { 4088 // .tbss must only be shown in the PT_TLS segment. 4089 if (Sec.sh_type == ELF::SHT_NOBITS) 4090 return Phdr.p_type == ELF::PT_TLS; 4091 4092 // SHF_TLS sections are only shown in PT_TLS, PT_LOAD or PT_GNU_RELRO 4093 // segments. 4094 return (Phdr.p_type == ELF::PT_TLS) || (Phdr.p_type == ELF::PT_LOAD) || 4095 (Phdr.p_type == ELF::PT_GNU_RELRO); 4096 } 4097 4098 // PT_TLS must only have SHF_TLS sections. 4099 return Phdr.p_type != ELF::PT_TLS; 4100 } 4101 4102 template <class ELFT> 4103 static bool checkOffsets(const typename ELFT::Phdr &Phdr, 4104 const typename ELFT::Shdr &Sec) { 4105 // SHT_NOBITS sections don't need to have an offset inside the segment. 4106 if (Sec.sh_type == ELF::SHT_NOBITS) 4107 return true; 4108 4109 if (Sec.sh_offset < Phdr.p_offset) 4110 return false; 4111 4112 // Only non-empty sections can be at the end of a segment. 4113 if (Sec.sh_size == 0) 4114 return (Sec.sh_offset + 1 <= Phdr.p_offset + Phdr.p_filesz); 4115 return Sec.sh_offset + Sec.sh_size <= Phdr.p_offset + Phdr.p_filesz; 4116 } 4117 4118 // Check that an allocatable section belongs to a virtual address 4119 // space of a segment. 4120 template <class ELFT> 4121 static bool checkVMA(const typename ELFT::Phdr &Phdr, 4122 const typename ELFT::Shdr &Sec) { 4123 if (!(Sec.sh_flags & ELF::SHF_ALLOC)) 4124 return true; 4125 4126 if (Sec.sh_addr < Phdr.p_vaddr) 4127 return false; 4128 4129 bool IsTbss = 4130 (Sec.sh_type == ELF::SHT_NOBITS) && ((Sec.sh_flags & ELF::SHF_TLS) != 0); 4131 // .tbss is special, it only has memory in PT_TLS and has NOBITS properties. 4132 bool IsTbssInNonTLS = IsTbss && Phdr.p_type != ELF::PT_TLS; 4133 // Only non-empty sections can be at the end of a segment. 4134 if (Sec.sh_size == 0 || IsTbssInNonTLS) 4135 return Sec.sh_addr + 1 <= Phdr.p_vaddr + Phdr.p_memsz; 4136 return Sec.sh_addr + Sec.sh_size <= Phdr.p_vaddr + Phdr.p_memsz; 4137 } 4138 4139 template <class ELFT> 4140 static bool checkPTDynamic(const typename ELFT::Phdr &Phdr, 4141 const typename ELFT::Shdr &Sec) { 4142 if (Phdr.p_type != ELF::PT_DYNAMIC || Phdr.p_memsz == 0 || Sec.sh_size != 0) 4143 return true; 4144 4145 // We get here when we have an empty section. Only non-empty sections can be 4146 // at the start or at the end of PT_DYNAMIC. 4147 // Is section within the phdr both based on offset and VMA? 4148 bool CheckOffset = (Sec.sh_type == ELF::SHT_NOBITS) || 4149 (Sec.sh_offset > Phdr.p_offset && 4150 Sec.sh_offset < Phdr.p_offset + Phdr.p_filesz); 4151 bool CheckVA = !(Sec.sh_flags & ELF::SHF_ALLOC) || 4152 (Sec.sh_addr > Phdr.p_vaddr && Sec.sh_addr < Phdr.p_memsz); 4153 return CheckOffset && CheckVA; 4154 } 4155 4156 template <class ELFT> 4157 void GNUELFDumper<ELFT>::printProgramHeaders( 4158 bool PrintProgramHeaders, cl::boolOrDefault PrintSectionMapping) { 4159 if (PrintProgramHeaders) 4160 printProgramHeaders(); 4161 4162 // Display the section mapping along with the program headers, unless 4163 // -section-mapping is explicitly set to false. 4164 if (PrintSectionMapping != cl::BOU_FALSE) 4165 printSectionMapping(); 4166 } 4167 4168 template <class ELFT> void GNUELFDumper<ELFT>::printProgramHeaders() { 4169 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 4170 const Elf_Ehdr &Header = this->Obj.getHeader(); 4171 Field Fields[8] = {2, 17, 26, 37 + Bias, 4172 48 + Bias, 56 + Bias, 64 + Bias, 68 + Bias}; 4173 OS << "\nElf file type is " 4174 << printEnum(Header.e_type, makeArrayRef(ElfObjectFileType)) << "\n" 4175 << "Entry point " << format_hex(Header.e_entry, 3) << "\n" 4176 << "There are " << Header.e_phnum << " program headers," 4177 << " starting at offset " << Header.e_phoff << "\n\n" 4178 << "Program Headers:\n"; 4179 if (ELFT::Is64Bits) 4180 OS << " Type Offset VirtAddr PhysAddr " 4181 << " FileSiz MemSiz Flg Align\n"; 4182 else 4183 OS << " Type Offset VirtAddr PhysAddr FileSiz " 4184 << "MemSiz Flg Align\n"; 4185 4186 unsigned Width = ELFT::Is64Bits ? 18 : 10; 4187 unsigned SizeWidth = ELFT::Is64Bits ? 8 : 7; 4188 4189 Expected<ArrayRef<Elf_Phdr>> PhdrsOrErr = this->Obj.program_headers(); 4190 if (!PhdrsOrErr) { 4191 this->reportUniqueWarning("unable to dump program headers: " + 4192 toString(PhdrsOrErr.takeError())); 4193 return; 4194 } 4195 4196 for (const Elf_Phdr &Phdr : *PhdrsOrErr) { 4197 Fields[0].Str = getGNUPtType(Header.e_machine, Phdr.p_type); 4198 Fields[1].Str = to_string(format_hex(Phdr.p_offset, 8)); 4199 Fields[2].Str = to_string(format_hex(Phdr.p_vaddr, Width)); 4200 Fields[3].Str = to_string(format_hex(Phdr.p_paddr, Width)); 4201 Fields[4].Str = to_string(format_hex(Phdr.p_filesz, SizeWidth)); 4202 Fields[5].Str = to_string(format_hex(Phdr.p_memsz, SizeWidth)); 4203 Fields[6].Str = printPhdrFlags(Phdr.p_flags); 4204 Fields[7].Str = to_string(format_hex(Phdr.p_align, 1)); 4205 for (const Field &F : Fields) 4206 printField(F); 4207 if (Phdr.p_type == ELF::PT_INTERP) { 4208 OS << "\n"; 4209 auto ReportBadInterp = [&](const Twine &Msg) { 4210 this->reportUniqueWarning( 4211 "unable to read program interpreter name at offset 0x" + 4212 Twine::utohexstr(Phdr.p_offset) + ": " + Msg); 4213 }; 4214 4215 if (Phdr.p_offset >= this->Obj.getBufSize()) { 4216 ReportBadInterp("it goes past the end of the file (0x" + 4217 Twine::utohexstr(this->Obj.getBufSize()) + ")"); 4218 continue; 4219 } 4220 4221 const char *Data = 4222 reinterpret_cast<const char *>(this->Obj.base()) + Phdr.p_offset; 4223 size_t MaxSize = this->Obj.getBufSize() - Phdr.p_offset; 4224 size_t Len = strnlen(Data, MaxSize); 4225 if (Len == MaxSize) { 4226 ReportBadInterp("it is not null-terminated"); 4227 continue; 4228 } 4229 4230 OS << " [Requesting program interpreter: "; 4231 OS << StringRef(Data, Len) << "]"; 4232 } 4233 OS << "\n"; 4234 } 4235 } 4236 4237 template <class ELFT> void GNUELFDumper<ELFT>::printSectionMapping() { 4238 OS << "\n Section to Segment mapping:\n Segment Sections...\n"; 4239 DenseSet<const Elf_Shdr *> BelongsToSegment; 4240 int Phnum = 0; 4241 4242 Expected<ArrayRef<Elf_Phdr>> PhdrsOrErr = this->Obj.program_headers(); 4243 if (!PhdrsOrErr) { 4244 this->reportUniqueWarning( 4245 "can't read program headers to build section to segment mapping: " + 4246 toString(PhdrsOrErr.takeError())); 4247 return; 4248 } 4249 4250 for (const Elf_Phdr &Phdr : *PhdrsOrErr) { 4251 std::string Sections; 4252 OS << format(" %2.2d ", Phnum++); 4253 // Check if each section is in a segment and then print mapping. 4254 for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) { 4255 if (Sec.sh_type == ELF::SHT_NULL) 4256 continue; 4257 4258 // readelf additionally makes sure it does not print zero sized sections 4259 // at end of segments and for PT_DYNAMIC both start and end of section 4260 // .tbss must only be shown in PT_TLS section. 4261 if (checkTLSSections<ELFT>(Phdr, Sec) && checkOffsets<ELFT>(Phdr, Sec) && 4262 checkVMA<ELFT>(Phdr, Sec) && checkPTDynamic<ELFT>(Phdr, Sec)) { 4263 Sections += 4264 unwrapOrError(this->FileName, this->Obj.getSectionName(Sec)).str() + 4265 " "; 4266 BelongsToSegment.insert(&Sec); 4267 } 4268 } 4269 OS << Sections << "\n"; 4270 OS.flush(); 4271 } 4272 4273 // Display sections that do not belong to a segment. 4274 std::string Sections; 4275 for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) { 4276 if (BelongsToSegment.find(&Sec) == BelongsToSegment.end()) 4277 Sections += 4278 unwrapOrError(this->FileName, this->Obj.getSectionName(Sec)).str() + 4279 ' '; 4280 } 4281 if (!Sections.empty()) { 4282 OS << " None " << Sections << '\n'; 4283 OS.flush(); 4284 } 4285 } 4286 4287 namespace { 4288 4289 template <class ELFT> 4290 RelSymbol<ELFT> getSymbolForReloc(const ELFDumper<ELFT> &Dumper, 4291 const Relocation<ELFT> &Reloc) { 4292 using Elf_Sym = typename ELFT::Sym; 4293 auto WarnAndReturn = [&](const Elf_Sym *Sym, 4294 const Twine &Reason) -> RelSymbol<ELFT> { 4295 Dumper.reportUniqueWarning( 4296 "unable to get name of the dynamic symbol with index " + 4297 Twine(Reloc.Symbol) + ": " + Reason); 4298 return {Sym, "<corrupt>"}; 4299 }; 4300 4301 ArrayRef<Elf_Sym> Symbols = Dumper.dynamic_symbols(); 4302 const Elf_Sym *FirstSym = Symbols.begin(); 4303 if (!FirstSym) 4304 return WarnAndReturn(nullptr, "no dynamic symbol table found"); 4305 4306 // We might have an object without a section header. In this case the size of 4307 // Symbols is zero, because there is no way to know the size of the dynamic 4308 // table. We should allow this case and not print a warning. 4309 if (!Symbols.empty() && Reloc.Symbol >= Symbols.size()) 4310 return WarnAndReturn( 4311 nullptr, 4312 "index is greater than or equal to the number of dynamic symbols (" + 4313 Twine(Symbols.size()) + ")"); 4314 4315 const ELFFile<ELFT> &Obj = Dumper.getElfObject().getELFFile(); 4316 const uint64_t FileSize = Obj.getBufSize(); 4317 const uint64_t SymOffset = ((const uint8_t *)FirstSym - Obj.base()) + 4318 (uint64_t)Reloc.Symbol * sizeof(Elf_Sym); 4319 if (SymOffset + sizeof(Elf_Sym) > FileSize) 4320 return WarnAndReturn(nullptr, "symbol at 0x" + Twine::utohexstr(SymOffset) + 4321 " goes past the end of the file (0x" + 4322 Twine::utohexstr(FileSize) + ")"); 4323 4324 const Elf_Sym *Sym = FirstSym + Reloc.Symbol; 4325 Expected<StringRef> ErrOrName = Sym->getName(Dumper.getDynamicStringTable()); 4326 if (!ErrOrName) 4327 return WarnAndReturn(Sym, toString(ErrOrName.takeError())); 4328 4329 return {Sym == FirstSym ? nullptr : Sym, maybeDemangle(*ErrOrName)}; 4330 } 4331 } // namespace 4332 4333 template <class ELFT> 4334 static size_t getMaxDynamicTagSize(const ELFFile<ELFT> &Obj, 4335 typename ELFT::DynRange Tags) { 4336 size_t Max = 0; 4337 for (const typename ELFT::Dyn &Dyn : Tags) 4338 Max = std::max(Max, Obj.getDynamicTagAsString(Dyn.d_tag).size()); 4339 return Max; 4340 } 4341 4342 template <class ELFT> void GNUELFDumper<ELFT>::printDynamicTable() { 4343 Elf_Dyn_Range Table = this->dynamic_table(); 4344 if (Table.empty()) 4345 return; 4346 4347 OS << "Dynamic section at offset " 4348 << format_hex(reinterpret_cast<const uint8_t *>(this->DynamicTable.Addr) - 4349 this->Obj.base(), 4350 1) 4351 << " contains " << Table.size() << " entries:\n"; 4352 4353 // The type name is surrounded with round brackets, hence add 2. 4354 size_t MaxTagSize = getMaxDynamicTagSize(this->Obj, Table) + 2; 4355 // The "Name/Value" column should be indented from the "Type" column by N 4356 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 4357 // space (1) = 3. 4358 OS << " Tag" + std::string(ELFT::Is64Bits ? 16 : 8, ' ') + "Type" 4359 << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 4360 4361 std::string ValueFmt = " %-" + std::to_string(MaxTagSize) + "s "; 4362 for (auto Entry : Table) { 4363 uintX_t Tag = Entry.getTag(); 4364 std::string Type = 4365 std::string("(") + this->Obj.getDynamicTagAsString(Tag).c_str() + ")"; 4366 std::string Value = this->getDynamicEntry(Tag, Entry.getVal()); 4367 OS << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10) 4368 << format(ValueFmt.c_str(), Type.c_str()) << Value << "\n"; 4369 } 4370 } 4371 4372 template <class ELFT> void GNUELFDumper<ELFT>::printDynamicRelocations() { 4373 this->printDynamicRelocationsHelper(); 4374 } 4375 4376 template <class ELFT> 4377 void ELFDumper<ELFT>::printDynamicReloc(const Relocation<ELFT> &R) { 4378 printRelRelaReloc(R, getSymbolForReloc(*this, R)); 4379 } 4380 4381 template <class ELFT> 4382 void ELFDumper<ELFT>::printRelocationsHelper(const Elf_Shdr &Sec) { 4383 this->forEachRelocationDo( 4384 Sec, opts::RawRelr, 4385 [&](const Relocation<ELFT> &R, unsigned Ndx, const Elf_Shdr &Sec, 4386 const Elf_Shdr *SymTab) { printReloc(R, Ndx, Sec, SymTab); }, 4387 [&](const Elf_Relr &R) { printRelrReloc(R); }); 4388 } 4389 4390 template <class ELFT> void ELFDumper<ELFT>::printDynamicRelocationsHelper() { 4391 const bool IsMips64EL = this->Obj.isMips64EL(); 4392 if (this->DynRelaRegion.Size > 0) { 4393 printDynamicRelocHeader(ELF::SHT_RELA, "RELA", this->DynRelaRegion); 4394 for (const Elf_Rela &Rela : 4395 this->DynRelaRegion.template getAsArrayRef<Elf_Rela>()) 4396 printDynamicReloc(Relocation<ELFT>(Rela, IsMips64EL)); 4397 } 4398 4399 if (this->DynRelRegion.Size > 0) { 4400 printDynamicRelocHeader(ELF::SHT_REL, "REL", this->DynRelRegion); 4401 for (const Elf_Rel &Rel : 4402 this->DynRelRegion.template getAsArrayRef<Elf_Rel>()) 4403 printDynamicReloc(Relocation<ELFT>(Rel, IsMips64EL)); 4404 } 4405 4406 if (this->DynRelrRegion.Size > 0) { 4407 printDynamicRelocHeader(ELF::SHT_REL, "RELR", this->DynRelrRegion); 4408 Elf_Relr_Range Relrs = 4409 this->DynRelrRegion.template getAsArrayRef<Elf_Relr>(); 4410 for (const Elf_Rel &Rel : Obj.decode_relrs(Relrs)) 4411 printDynamicReloc(Relocation<ELFT>(Rel, IsMips64EL)); 4412 } 4413 4414 if (this->DynPLTRelRegion.Size) { 4415 if (this->DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) { 4416 printDynamicRelocHeader(ELF::SHT_RELA, "PLT", this->DynPLTRelRegion); 4417 for (const Elf_Rela &Rela : 4418 this->DynPLTRelRegion.template getAsArrayRef<Elf_Rela>()) 4419 printDynamicReloc(Relocation<ELFT>(Rela, IsMips64EL)); 4420 } else { 4421 printDynamicRelocHeader(ELF::SHT_REL, "PLT", this->DynPLTRelRegion); 4422 for (const Elf_Rel &Rel : 4423 this->DynPLTRelRegion.template getAsArrayRef<Elf_Rel>()) 4424 printDynamicReloc(Relocation<ELFT>(Rel, IsMips64EL)); 4425 } 4426 } 4427 } 4428 4429 template <class ELFT> 4430 void GNUELFDumper<ELFT>::printGNUVersionSectionProlog( 4431 const typename ELFT::Shdr &Sec, const Twine &Label, unsigned EntriesNum) { 4432 // Don't inline the SecName, because it might report a warning to stderr and 4433 // corrupt the output. 4434 StringRef SecName = this->getPrintableSectionName(Sec); 4435 OS << Label << " section '" << SecName << "' " 4436 << "contains " << EntriesNum << " entries:\n"; 4437 4438 StringRef LinkedSecName = "<corrupt>"; 4439 if (Expected<const typename ELFT::Shdr *> LinkedSecOrErr = 4440 this->Obj.getSection(Sec.sh_link)) 4441 LinkedSecName = this->getPrintableSectionName(**LinkedSecOrErr); 4442 else 4443 this->reportUniqueWarning("invalid section linked to " + 4444 this->describe(Sec) + ": " + 4445 toString(LinkedSecOrErr.takeError())); 4446 4447 OS << " Addr: " << format_hex_no_prefix(Sec.sh_addr, 16) 4448 << " Offset: " << format_hex(Sec.sh_offset, 8) 4449 << " Link: " << Sec.sh_link << " (" << LinkedSecName << ")\n"; 4450 } 4451 4452 template <class ELFT> 4453 void GNUELFDumper<ELFT>::printVersionSymbolSection(const Elf_Shdr *Sec) { 4454 if (!Sec) 4455 return; 4456 4457 printGNUVersionSectionProlog(*Sec, "Version symbols", 4458 Sec->sh_size / sizeof(Elf_Versym)); 4459 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 4460 this->getVersionTable(*Sec, /*SymTab=*/nullptr, 4461 /*StrTab=*/nullptr, /*SymTabSec=*/nullptr); 4462 if (!VerTableOrErr) { 4463 this->reportUniqueWarning(VerTableOrErr.takeError()); 4464 return; 4465 } 4466 4467 SmallVector<Optional<VersionEntry>, 0> *VersionMap = nullptr; 4468 if (Expected<SmallVector<Optional<VersionEntry>, 0> *> MapOrErr = 4469 this->getVersionMap()) 4470 VersionMap = *MapOrErr; 4471 else 4472 this->reportUniqueWarning(MapOrErr.takeError()); 4473 4474 ArrayRef<Elf_Versym> VerTable = *VerTableOrErr; 4475 std::vector<StringRef> Versions; 4476 for (size_t I = 0, E = VerTable.size(); I < E; ++I) { 4477 unsigned Ndx = VerTable[I].vs_index; 4478 if (Ndx == VER_NDX_LOCAL || Ndx == VER_NDX_GLOBAL) { 4479 Versions.emplace_back(Ndx == VER_NDX_LOCAL ? "*local*" : "*global*"); 4480 continue; 4481 } 4482 4483 if (!VersionMap) { 4484 Versions.emplace_back("<corrupt>"); 4485 continue; 4486 } 4487 4488 bool IsDefault; 4489 Expected<StringRef> NameOrErr = this->Obj.getSymbolVersionByIndex( 4490 Ndx, IsDefault, *VersionMap, /*IsSymHidden=*/None); 4491 if (!NameOrErr) { 4492 this->reportUniqueWarning("unable to get a version for entry " + 4493 Twine(I) + " of " + this->describe(*Sec) + 4494 ": " + toString(NameOrErr.takeError())); 4495 Versions.emplace_back("<corrupt>"); 4496 continue; 4497 } 4498 Versions.emplace_back(*NameOrErr); 4499 } 4500 4501 // readelf prints 4 entries per line. 4502 uint64_t Entries = VerTable.size(); 4503 for (uint64_t VersymRow = 0; VersymRow < Entries; VersymRow += 4) { 4504 OS << " " << format_hex_no_prefix(VersymRow, 3) << ":"; 4505 for (uint64_t I = 0; (I < 4) && (I + VersymRow) < Entries; ++I) { 4506 unsigned Ndx = VerTable[VersymRow + I].vs_index; 4507 OS << format("%4x%c", Ndx & VERSYM_VERSION, 4508 Ndx & VERSYM_HIDDEN ? 'h' : ' '); 4509 OS << left_justify("(" + std::string(Versions[VersymRow + I]) + ")", 13); 4510 } 4511 OS << '\n'; 4512 } 4513 OS << '\n'; 4514 } 4515 4516 static std::string versionFlagToString(unsigned Flags) { 4517 if (Flags == 0) 4518 return "none"; 4519 4520 std::string Ret; 4521 auto AddFlag = [&Ret, &Flags](unsigned Flag, StringRef Name) { 4522 if (!(Flags & Flag)) 4523 return; 4524 if (!Ret.empty()) 4525 Ret += " | "; 4526 Ret += Name; 4527 Flags &= ~Flag; 4528 }; 4529 4530 AddFlag(VER_FLG_BASE, "BASE"); 4531 AddFlag(VER_FLG_WEAK, "WEAK"); 4532 AddFlag(VER_FLG_INFO, "INFO"); 4533 AddFlag(~0, "<unknown>"); 4534 return Ret; 4535 } 4536 4537 template <class ELFT> 4538 void GNUELFDumper<ELFT>::printVersionDefinitionSection(const Elf_Shdr *Sec) { 4539 if (!Sec) 4540 return; 4541 4542 printGNUVersionSectionProlog(*Sec, "Version definition", Sec->sh_info); 4543 4544 Expected<std::vector<VerDef>> V = this->Obj.getVersionDefinitions(*Sec); 4545 if (!V) { 4546 this->reportUniqueWarning(V.takeError()); 4547 return; 4548 } 4549 4550 for (const VerDef &Def : *V) { 4551 OS << format(" 0x%04x: Rev: %u Flags: %s Index: %u Cnt: %u Name: %s\n", 4552 Def.Offset, Def.Version, 4553 versionFlagToString(Def.Flags).c_str(), Def.Ndx, Def.Cnt, 4554 Def.Name.data()); 4555 unsigned I = 0; 4556 for (const VerdAux &Aux : Def.AuxV) 4557 OS << format(" 0x%04x: Parent %u: %s\n", Aux.Offset, ++I, 4558 Aux.Name.data()); 4559 } 4560 4561 OS << '\n'; 4562 } 4563 4564 template <class ELFT> 4565 void GNUELFDumper<ELFT>::printVersionDependencySection(const Elf_Shdr *Sec) { 4566 if (!Sec) 4567 return; 4568 4569 unsigned VerneedNum = Sec->sh_info; 4570 printGNUVersionSectionProlog(*Sec, "Version needs", VerneedNum); 4571 4572 Expected<std::vector<VerNeed>> V = 4573 this->Obj.getVersionDependencies(*Sec, this->WarningHandler); 4574 if (!V) { 4575 this->reportUniqueWarning(V.takeError()); 4576 return; 4577 } 4578 4579 for (const VerNeed &VN : *V) { 4580 OS << format(" 0x%04x: Version: %u File: %s Cnt: %u\n", VN.Offset, 4581 VN.Version, VN.File.data(), VN.Cnt); 4582 for (const VernAux &Aux : VN.AuxV) 4583 OS << format(" 0x%04x: Name: %s Flags: %s Version: %u\n", Aux.Offset, 4584 Aux.Name.data(), versionFlagToString(Aux.Flags).c_str(), 4585 Aux.Other); 4586 } 4587 OS << '\n'; 4588 } 4589 4590 template <class ELFT> 4591 void GNUELFDumper<ELFT>::printHashHistogram(const Elf_Hash &HashTable) { 4592 size_t NBucket = HashTable.nbucket; 4593 size_t NChain = HashTable.nchain; 4594 ArrayRef<Elf_Word> Buckets = HashTable.buckets(); 4595 ArrayRef<Elf_Word> Chains = HashTable.chains(); 4596 size_t TotalSyms = 0; 4597 // If hash table is correct, we have at least chains with 0 length 4598 size_t MaxChain = 1; 4599 size_t CumulativeNonZero = 0; 4600 4601 if (NChain == 0 || NBucket == 0) 4602 return; 4603 4604 std::vector<size_t> ChainLen(NBucket, 0); 4605 // Go over all buckets and and note chain lengths of each bucket (total 4606 // unique chain lengths). 4607 for (size_t B = 0; B < NBucket; B++) { 4608 std::vector<bool> Visited(NChain); 4609 for (size_t C = Buckets[B]; C < NChain; C = Chains[C]) { 4610 if (C == ELF::STN_UNDEF) 4611 break; 4612 if (Visited[C]) { 4613 this->reportUniqueWarning(".hash section is invalid: bucket " + 4614 Twine(C) + 4615 ": a cycle was detected in the linked chain"); 4616 break; 4617 } 4618 Visited[C] = true; 4619 if (MaxChain <= ++ChainLen[B]) 4620 MaxChain++; 4621 } 4622 TotalSyms += ChainLen[B]; 4623 } 4624 4625 if (!TotalSyms) 4626 return; 4627 4628 std::vector<size_t> Count(MaxChain, 0); 4629 // Count how long is the chain for each bucket 4630 for (size_t B = 0; B < NBucket; B++) 4631 ++Count[ChainLen[B]]; 4632 // Print Number of buckets with each chain lengths and their cumulative 4633 // coverage of the symbols 4634 OS << "Histogram for bucket list length (total of " << NBucket 4635 << " buckets)\n" 4636 << " Length Number % of total Coverage\n"; 4637 for (size_t I = 0; I < MaxChain; I++) { 4638 CumulativeNonZero += Count[I] * I; 4639 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4640 (Count[I] * 100.0) / NBucket, 4641 (CumulativeNonZero * 100.0) / TotalSyms); 4642 } 4643 } 4644 4645 template <class ELFT> 4646 void GNUELFDumper<ELFT>::printGnuHashHistogram( 4647 const Elf_GnuHash &GnuHashTable) { 4648 Expected<ArrayRef<Elf_Word>> ChainsOrErr = 4649 getGnuHashTableChains<ELFT>(this->DynSymRegion, &GnuHashTable); 4650 if (!ChainsOrErr) { 4651 this->reportUniqueWarning("unable to print the GNU hash table histogram: " + 4652 toString(ChainsOrErr.takeError())); 4653 return; 4654 } 4655 4656 ArrayRef<Elf_Word> Chains = *ChainsOrErr; 4657 size_t Symndx = GnuHashTable.symndx; 4658 size_t TotalSyms = 0; 4659 size_t MaxChain = 1; 4660 size_t CumulativeNonZero = 0; 4661 4662 size_t NBucket = GnuHashTable.nbuckets; 4663 if (Chains.empty() || NBucket == 0) 4664 return; 4665 4666 ArrayRef<Elf_Word> Buckets = GnuHashTable.buckets(); 4667 std::vector<size_t> ChainLen(NBucket, 0); 4668 for (size_t B = 0; B < NBucket; B++) { 4669 if (!Buckets[B]) 4670 continue; 4671 size_t Len = 1; 4672 for (size_t C = Buckets[B] - Symndx; 4673 C < Chains.size() && (Chains[C] & 1) == 0; C++) 4674 if (MaxChain < ++Len) 4675 MaxChain++; 4676 ChainLen[B] = Len; 4677 TotalSyms += Len; 4678 } 4679 MaxChain++; 4680 4681 if (!TotalSyms) 4682 return; 4683 4684 std::vector<size_t> Count(MaxChain, 0); 4685 for (size_t B = 0; B < NBucket; B++) 4686 ++Count[ChainLen[B]]; 4687 // Print Number of buckets with each chain lengths and their cumulative 4688 // coverage of the symbols 4689 OS << "Histogram for `.gnu.hash' bucket list length (total of " << NBucket 4690 << " buckets)\n" 4691 << " Length Number % of total Coverage\n"; 4692 for (size_t I = 0; I < MaxChain; I++) { 4693 CumulativeNonZero += Count[I] * I; 4694 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4695 (Count[I] * 100.0) / NBucket, 4696 (CumulativeNonZero * 100.0) / TotalSyms); 4697 } 4698 } 4699 4700 // Hash histogram shows statistics of how efficient the hash was for the 4701 // dynamic symbol table. The table shows the number of hash buckets for 4702 // different lengths of chains as an absolute number and percentage of the total 4703 // buckets, and the cumulative coverage of symbols for each set of buckets. 4704 template <class ELFT> void GNUELFDumper<ELFT>::printHashHistograms() { 4705 // Print histogram for the .hash section. 4706 if (this->HashTable) { 4707 if (Error E = checkHashTable<ELFT>(*this, this->HashTable)) 4708 this->reportUniqueWarning(std::move(E)); 4709 else 4710 printHashHistogram(*this->HashTable); 4711 } 4712 4713 // Print histogram for the .gnu.hash section. 4714 if (this->GnuHashTable) { 4715 if (Error E = checkGNUHashTable<ELFT>(this->Obj, this->GnuHashTable)) 4716 this->reportUniqueWarning(std::move(E)); 4717 else 4718 printGnuHashHistogram(*this->GnuHashTable); 4719 } 4720 } 4721 4722 template <class ELFT> void GNUELFDumper<ELFT>::printCGProfile() { 4723 OS << "GNUStyle::printCGProfile not implemented\n"; 4724 } 4725 4726 template <class ELFT> void GNUELFDumper<ELFT>::printBBAddrMaps() { 4727 OS << "GNUStyle::printBBAddrMaps not implemented\n"; 4728 } 4729 4730 static Expected<std::vector<uint64_t>> toULEB128Array(ArrayRef<uint8_t> Data) { 4731 std::vector<uint64_t> Ret; 4732 const uint8_t *Cur = Data.begin(); 4733 const uint8_t *End = Data.end(); 4734 while (Cur != End) { 4735 unsigned Size; 4736 const char *Err; 4737 Ret.push_back(decodeULEB128(Cur, &Size, End, &Err)); 4738 if (Err) 4739 return createError(Err); 4740 Cur += Size; 4741 } 4742 return Ret; 4743 } 4744 4745 template <class ELFT> 4746 static Expected<std::vector<uint64_t>> 4747 decodeAddrsigSection(const ELFFile<ELFT> &Obj, const typename ELFT::Shdr &Sec) { 4748 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj.getSectionContents(Sec); 4749 if (!ContentsOrErr) 4750 return ContentsOrErr.takeError(); 4751 4752 if (Expected<std::vector<uint64_t>> SymsOrErr = 4753 toULEB128Array(*ContentsOrErr)) 4754 return *SymsOrErr; 4755 else 4756 return createError("unable to decode " + describe(Obj, Sec) + ": " + 4757 toString(SymsOrErr.takeError())); 4758 } 4759 4760 template <class ELFT> void GNUELFDumper<ELFT>::printAddrsig() { 4761 if (!this->DotAddrsigSec) 4762 return; 4763 4764 Expected<std::vector<uint64_t>> SymsOrErr = 4765 decodeAddrsigSection(this->Obj, *this->DotAddrsigSec); 4766 if (!SymsOrErr) { 4767 this->reportUniqueWarning(SymsOrErr.takeError()); 4768 return; 4769 } 4770 4771 StringRef Name = this->getPrintableSectionName(*this->DotAddrsigSec); 4772 OS << "\nAddress-significant symbols section '" << Name << "'" 4773 << " contains " << SymsOrErr->size() << " entries:\n"; 4774 OS << " Num: Name\n"; 4775 4776 Field Fields[2] = {0, 8}; 4777 size_t SymIndex = 0; 4778 for (uint64_t Sym : *SymsOrErr) { 4779 Fields[0].Str = to_string(format_decimal(++SymIndex, 6)) + ":"; 4780 Fields[1].Str = this->getStaticSymbolName(Sym); 4781 for (const Field &Entry : Fields) 4782 printField(Entry); 4783 OS << "\n"; 4784 } 4785 } 4786 4787 template <typename ELFT> 4788 static std::string getGNUProperty(uint32_t Type, uint32_t DataSize, 4789 ArrayRef<uint8_t> Data) { 4790 std::string str; 4791 raw_string_ostream OS(str); 4792 uint32_t PrData; 4793 auto DumpBit = [&](uint32_t Flag, StringRef Name) { 4794 if (PrData & Flag) { 4795 PrData &= ~Flag; 4796 OS << Name; 4797 if (PrData) 4798 OS << ", "; 4799 } 4800 }; 4801 4802 switch (Type) { 4803 default: 4804 OS << format("<application-specific type 0x%x>", Type); 4805 return OS.str(); 4806 case GNU_PROPERTY_STACK_SIZE: { 4807 OS << "stack size: "; 4808 if (DataSize == sizeof(typename ELFT::uint)) 4809 OS << formatv("{0:x}", 4810 (uint64_t)(*(const typename ELFT::Addr *)Data.data())); 4811 else 4812 OS << format("<corrupt length: 0x%x>", DataSize); 4813 return OS.str(); 4814 } 4815 case GNU_PROPERTY_NO_COPY_ON_PROTECTED: 4816 OS << "no copy on protected"; 4817 if (DataSize) 4818 OS << format(" <corrupt length: 0x%x>", DataSize); 4819 return OS.str(); 4820 case GNU_PROPERTY_AARCH64_FEATURE_1_AND: 4821 case GNU_PROPERTY_X86_FEATURE_1_AND: 4822 OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: " 4823 : "x86 feature: "); 4824 if (DataSize != 4) { 4825 OS << format("<corrupt length: 0x%x>", DataSize); 4826 return OS.str(); 4827 } 4828 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4829 if (PrData == 0) { 4830 OS << "<None>"; 4831 return OS.str(); 4832 } 4833 if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) { 4834 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI"); 4835 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC"); 4836 } else { 4837 DumpBit(GNU_PROPERTY_X86_FEATURE_1_IBT, "IBT"); 4838 DumpBit(GNU_PROPERTY_X86_FEATURE_1_SHSTK, "SHSTK"); 4839 } 4840 if (PrData) 4841 OS << format("<unknown flags: 0x%x>", PrData); 4842 return OS.str(); 4843 case GNU_PROPERTY_X86_FEATURE_2_NEEDED: 4844 case GNU_PROPERTY_X86_FEATURE_2_USED: 4845 OS << "x86 feature " 4846 << (Type == GNU_PROPERTY_X86_FEATURE_2_NEEDED ? "needed: " : "used: "); 4847 if (DataSize != 4) { 4848 OS << format("<corrupt length: 0x%x>", DataSize); 4849 return OS.str(); 4850 } 4851 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4852 if (PrData == 0) { 4853 OS << "<None>"; 4854 return OS.str(); 4855 } 4856 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X86, "x86"); 4857 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X87, "x87"); 4858 DumpBit(GNU_PROPERTY_X86_FEATURE_2_MMX, "MMX"); 4859 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XMM, "XMM"); 4860 DumpBit(GNU_PROPERTY_X86_FEATURE_2_YMM, "YMM"); 4861 DumpBit(GNU_PROPERTY_X86_FEATURE_2_ZMM, "ZMM"); 4862 DumpBit(GNU_PROPERTY_X86_FEATURE_2_FXSR, "FXSR"); 4863 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVE, "XSAVE"); 4864 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT, "XSAVEOPT"); 4865 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEC, "XSAVEC"); 4866 if (PrData) 4867 OS << format("<unknown flags: 0x%x>", PrData); 4868 return OS.str(); 4869 case GNU_PROPERTY_X86_ISA_1_NEEDED: 4870 case GNU_PROPERTY_X86_ISA_1_USED: 4871 OS << "x86 ISA " 4872 << (Type == GNU_PROPERTY_X86_ISA_1_NEEDED ? "needed: " : "used: "); 4873 if (DataSize != 4) { 4874 OS << format("<corrupt length: 0x%x>", DataSize); 4875 return OS.str(); 4876 } 4877 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4878 if (PrData == 0) { 4879 OS << "<None>"; 4880 return OS.str(); 4881 } 4882 DumpBit(GNU_PROPERTY_X86_ISA_1_BASELINE, "x86-64-baseline"); 4883 DumpBit(GNU_PROPERTY_X86_ISA_1_V2, "x86-64-v2"); 4884 DumpBit(GNU_PROPERTY_X86_ISA_1_V3, "x86-64-v3"); 4885 DumpBit(GNU_PROPERTY_X86_ISA_1_V4, "x86-64-v4"); 4886 if (PrData) 4887 OS << format("<unknown flags: 0x%x>", PrData); 4888 return OS.str(); 4889 } 4890 } 4891 4892 template <typename ELFT> 4893 static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) { 4894 using Elf_Word = typename ELFT::Word; 4895 4896 SmallVector<std::string, 4> Properties; 4897 while (Arr.size() >= 8) { 4898 uint32_t Type = *reinterpret_cast<const Elf_Word *>(Arr.data()); 4899 uint32_t DataSize = *reinterpret_cast<const Elf_Word *>(Arr.data() + 4); 4900 Arr = Arr.drop_front(8); 4901 4902 // Take padding size into account if present. 4903 uint64_t PaddedSize = alignTo(DataSize, sizeof(typename ELFT::uint)); 4904 std::string str; 4905 raw_string_ostream OS(str); 4906 if (Arr.size() < PaddedSize) { 4907 OS << format("<corrupt type (0x%x) datasz: 0x%x>", Type, DataSize); 4908 Properties.push_back(OS.str()); 4909 break; 4910 } 4911 Properties.push_back( 4912 getGNUProperty<ELFT>(Type, DataSize, Arr.take_front(PaddedSize))); 4913 Arr = Arr.drop_front(PaddedSize); 4914 } 4915 4916 if (!Arr.empty()) 4917 Properties.push_back("<corrupted GNU_PROPERTY_TYPE_0>"); 4918 4919 return Properties; 4920 } 4921 4922 struct GNUAbiTag { 4923 std::string OSName; 4924 std::string ABI; 4925 bool IsValid; 4926 }; 4927 4928 template <typename ELFT> static GNUAbiTag getGNUAbiTag(ArrayRef<uint8_t> Desc) { 4929 typedef typename ELFT::Word Elf_Word; 4930 4931 ArrayRef<Elf_Word> Words(reinterpret_cast<const Elf_Word *>(Desc.begin()), 4932 reinterpret_cast<const Elf_Word *>(Desc.end())); 4933 4934 if (Words.size() < 4) 4935 return {"", "", /*IsValid=*/false}; 4936 4937 static const char *OSNames[] = { 4938 "Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable", "NaCl", 4939 }; 4940 StringRef OSName = "Unknown"; 4941 if (Words[0] < array_lengthof(OSNames)) 4942 OSName = OSNames[Words[0]]; 4943 uint32_t Major = Words[1], Minor = Words[2], Patch = Words[3]; 4944 std::string str; 4945 raw_string_ostream ABI(str); 4946 ABI << Major << "." << Minor << "." << Patch; 4947 return {std::string(OSName), ABI.str(), /*IsValid=*/true}; 4948 } 4949 4950 static std::string getGNUBuildId(ArrayRef<uint8_t> Desc) { 4951 std::string str; 4952 raw_string_ostream OS(str); 4953 for (uint8_t B : Desc) 4954 OS << format_hex_no_prefix(B, 2); 4955 return OS.str(); 4956 } 4957 4958 static StringRef getDescAsStringRef(ArrayRef<uint8_t> Desc) { 4959 return StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 4960 } 4961 4962 template <typename ELFT> 4963 static bool printGNUNote(raw_ostream &OS, uint32_t NoteType, 4964 ArrayRef<uint8_t> Desc) { 4965 // Return true if we were able to pretty-print the note, false otherwise. 4966 switch (NoteType) { 4967 default: 4968 return false; 4969 case ELF::NT_GNU_ABI_TAG: { 4970 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 4971 if (!AbiTag.IsValid) 4972 OS << " <corrupt GNU_ABI_TAG>"; 4973 else 4974 OS << " OS: " << AbiTag.OSName << ", ABI: " << AbiTag.ABI; 4975 break; 4976 } 4977 case ELF::NT_GNU_BUILD_ID: { 4978 OS << " Build ID: " << getGNUBuildId(Desc); 4979 break; 4980 } 4981 case ELF::NT_GNU_GOLD_VERSION: 4982 OS << " Version: " << getDescAsStringRef(Desc); 4983 break; 4984 case ELF::NT_GNU_PROPERTY_TYPE_0: 4985 OS << " Properties:"; 4986 for (const std::string &Property : getGNUPropertyList<ELFT>(Desc)) 4987 OS << " " << Property << "\n"; 4988 break; 4989 } 4990 OS << '\n'; 4991 return true; 4992 } 4993 4994 template <typename ELFT> 4995 static bool printLLVMOMPOFFLOADNote(raw_ostream &OS, uint32_t NoteType, 4996 ArrayRef<uint8_t> Desc) { 4997 switch (NoteType) { 4998 default: 4999 return false; 5000 case ELF::NT_LLVM_OPENMP_OFFLOAD_VERSION: 5001 OS << " Version: " << getDescAsStringRef(Desc); 5002 break; 5003 case ELF::NT_LLVM_OPENMP_OFFLOAD_PRODUCER: 5004 OS << " Producer: " << getDescAsStringRef(Desc); 5005 break; 5006 case ELF::NT_LLVM_OPENMP_OFFLOAD_PRODUCER_VERSION: 5007 OS << " Producer version: " << getDescAsStringRef(Desc); 5008 break; 5009 } 5010 OS << '\n'; 5011 return true; 5012 } 5013 5014 static const EnumEntry<unsigned> FreeBSDFeatureCtlFlags[] = { 5015 {"ASLR_DISABLE", NT_FREEBSD_FCTL_ASLR_DISABLE}, 5016 {"PROTMAX_DISABLE", NT_FREEBSD_FCTL_PROTMAX_DISABLE}, 5017 {"STKGAP_DISABLE", NT_FREEBSD_FCTL_STKGAP_DISABLE}, 5018 {"WXNEEDED", NT_FREEBSD_FCTL_WXNEEDED}, 5019 {"LA48", NT_FREEBSD_FCTL_LA48}, 5020 {"ASG_DISABLE", NT_FREEBSD_FCTL_ASG_DISABLE}, 5021 }; 5022 5023 struct FreeBSDNote { 5024 std::string Type; 5025 std::string Value; 5026 }; 5027 5028 template <typename ELFT> 5029 static Optional<FreeBSDNote> 5030 getFreeBSDNote(uint32_t NoteType, ArrayRef<uint8_t> Desc, bool IsCore) { 5031 if (IsCore) 5032 return None; // No pretty-printing yet. 5033 switch (NoteType) { 5034 case ELF::NT_FREEBSD_ABI_TAG: 5035 if (Desc.size() != 4) 5036 return None; 5037 return FreeBSDNote{ 5038 "ABI tag", 5039 utostr(support::endian::read32<ELFT::TargetEndianness>(Desc.data()))}; 5040 case ELF::NT_FREEBSD_ARCH_TAG: 5041 return FreeBSDNote{"Arch tag", toStringRef(Desc).str()}; 5042 case ELF::NT_FREEBSD_FEATURE_CTL: { 5043 if (Desc.size() != 4) 5044 return None; 5045 unsigned Value = 5046 support::endian::read32<ELFT::TargetEndianness>(Desc.data()); 5047 std::string FlagsStr; 5048 raw_string_ostream OS(FlagsStr); 5049 printFlags(Value, makeArrayRef(FreeBSDFeatureCtlFlags), OS); 5050 if (OS.str().empty()) 5051 OS << "0x" << utohexstr(Value); 5052 else 5053 OS << "(0x" << utohexstr(Value) << ")"; 5054 return FreeBSDNote{"Feature flags", OS.str()}; 5055 } 5056 default: 5057 return None; 5058 } 5059 } 5060 5061 struct AMDNote { 5062 std::string Type; 5063 std::string Value; 5064 }; 5065 5066 template <typename ELFT> 5067 static AMDNote getAMDNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5068 switch (NoteType) { 5069 default: 5070 return {"", ""}; 5071 case ELF::NT_AMD_HSA_CODE_OBJECT_VERSION: { 5072 struct CodeObjectVersion { 5073 uint32_t MajorVersion; 5074 uint32_t MinorVersion; 5075 }; 5076 if (Desc.size() != sizeof(CodeObjectVersion)) 5077 return {"AMD HSA Code Object Version", 5078 "Invalid AMD HSA Code Object Version"}; 5079 std::string VersionString; 5080 raw_string_ostream StrOS(VersionString); 5081 auto Version = reinterpret_cast<const CodeObjectVersion *>(Desc.data()); 5082 StrOS << "[Major: " << Version->MajorVersion 5083 << ", Minor: " << Version->MinorVersion << "]"; 5084 return {"AMD HSA Code Object Version", VersionString}; 5085 } 5086 case ELF::NT_AMD_HSA_HSAIL: { 5087 struct HSAILProperties { 5088 uint32_t HSAILMajorVersion; 5089 uint32_t HSAILMinorVersion; 5090 uint8_t Profile; 5091 uint8_t MachineModel; 5092 uint8_t DefaultFloatRound; 5093 }; 5094 if (Desc.size() != sizeof(HSAILProperties)) 5095 return {"AMD HSA HSAIL Properties", "Invalid AMD HSA HSAIL Properties"}; 5096 auto Properties = reinterpret_cast<const HSAILProperties *>(Desc.data()); 5097 std::string HSAILPropetiesString; 5098 raw_string_ostream StrOS(HSAILPropetiesString); 5099 StrOS << "[HSAIL Major: " << Properties->HSAILMajorVersion 5100 << ", HSAIL Minor: " << Properties->HSAILMinorVersion 5101 << ", Profile: " << uint32_t(Properties->Profile) 5102 << ", Machine Model: " << uint32_t(Properties->MachineModel) 5103 << ", Default Float Round: " 5104 << uint32_t(Properties->DefaultFloatRound) << "]"; 5105 return {"AMD HSA HSAIL Properties", HSAILPropetiesString}; 5106 } 5107 case ELF::NT_AMD_HSA_ISA_VERSION: { 5108 struct IsaVersion { 5109 uint16_t VendorNameSize; 5110 uint16_t ArchitectureNameSize; 5111 uint32_t Major; 5112 uint32_t Minor; 5113 uint32_t Stepping; 5114 }; 5115 if (Desc.size() < sizeof(IsaVersion)) 5116 return {"AMD HSA ISA Version", "Invalid AMD HSA ISA Version"}; 5117 auto Isa = reinterpret_cast<const IsaVersion *>(Desc.data()); 5118 if (Desc.size() < sizeof(IsaVersion) + 5119 Isa->VendorNameSize + Isa->ArchitectureNameSize || 5120 Isa->VendorNameSize == 0 || Isa->ArchitectureNameSize == 0) 5121 return {"AMD HSA ISA Version", "Invalid AMD HSA ISA Version"}; 5122 std::string IsaString; 5123 raw_string_ostream StrOS(IsaString); 5124 StrOS << "[Vendor: " 5125 << StringRef((const char*)Desc.data() + sizeof(IsaVersion), Isa->VendorNameSize - 1) 5126 << ", Architecture: " 5127 << StringRef((const char*)Desc.data() + sizeof(IsaVersion) + Isa->VendorNameSize, 5128 Isa->ArchitectureNameSize - 1) 5129 << ", Major: " << Isa->Major << ", Minor: " << Isa->Minor 5130 << ", Stepping: " << Isa->Stepping << "]"; 5131 return {"AMD HSA ISA Version", IsaString}; 5132 } 5133 case ELF::NT_AMD_HSA_METADATA: { 5134 if (Desc.size() == 0) 5135 return {"AMD HSA Metadata", ""}; 5136 return { 5137 "AMD HSA Metadata", 5138 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size() - 1)}; 5139 } 5140 case ELF::NT_AMD_HSA_ISA_NAME: { 5141 if (Desc.size() == 0) 5142 return {"AMD HSA ISA Name", ""}; 5143 return { 5144 "AMD HSA ISA Name", 5145 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5146 } 5147 case ELF::NT_AMD_PAL_METADATA: { 5148 struct PALMetadata { 5149 uint32_t Key; 5150 uint32_t Value; 5151 }; 5152 if (Desc.size() % sizeof(PALMetadata) != 0) 5153 return {"AMD PAL Metadata", "Invalid AMD PAL Metadata"}; 5154 auto Isa = reinterpret_cast<const PALMetadata *>(Desc.data()); 5155 std::string MetadataString; 5156 raw_string_ostream StrOS(MetadataString); 5157 for (size_t I = 0, E = Desc.size() / sizeof(PALMetadata); I < E; ++I) { 5158 StrOS << "[" << Isa[I].Key << ": " << Isa[I].Value << "]"; 5159 } 5160 return {"AMD PAL Metadata", MetadataString}; 5161 } 5162 } 5163 } 5164 5165 struct AMDGPUNote { 5166 std::string Type; 5167 std::string Value; 5168 }; 5169 5170 template <typename ELFT> 5171 static AMDGPUNote getAMDGPUNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5172 switch (NoteType) { 5173 default: 5174 return {"", ""}; 5175 case ELF::NT_AMDGPU_METADATA: { 5176 StringRef MsgPackString = 5177 StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5178 msgpack::Document MsgPackDoc; 5179 if (!MsgPackDoc.readFromBlob(MsgPackString, /*Multi=*/false)) 5180 return {"", ""}; 5181 5182 AMDGPU::HSAMD::V3::MetadataVerifier Verifier(true); 5183 std::string MetadataString; 5184 if (!Verifier.verify(MsgPackDoc.getRoot())) 5185 MetadataString = "Invalid AMDGPU Metadata\n"; 5186 5187 raw_string_ostream StrOS(MetadataString); 5188 if (MsgPackDoc.getRoot().isScalar()) { 5189 // TODO: passing a scalar root to toYAML() asserts: 5190 // (PolymorphicTraits<T>::getKind(Val) != NodeKind::Scalar && 5191 // "plain scalar documents are not supported") 5192 // To avoid this crash we print the raw data instead. 5193 return {"", ""}; 5194 } 5195 MsgPackDoc.toYAML(StrOS); 5196 return {"AMDGPU Metadata", StrOS.str()}; 5197 } 5198 } 5199 } 5200 5201 struct CoreFileMapping { 5202 uint64_t Start, End, Offset; 5203 StringRef Filename; 5204 }; 5205 5206 struct CoreNote { 5207 uint64_t PageSize; 5208 std::vector<CoreFileMapping> Mappings; 5209 }; 5210 5211 static Expected<CoreNote> readCoreNote(DataExtractor Desc) { 5212 // Expected format of the NT_FILE note description: 5213 // 1. # of file mappings (call it N) 5214 // 2. Page size 5215 // 3. N (start, end, offset) triples 5216 // 4. N packed filenames (null delimited) 5217 // Each field is an Elf_Addr, except for filenames which are char* strings. 5218 5219 CoreNote Ret; 5220 const int Bytes = Desc.getAddressSize(); 5221 5222 if (!Desc.isValidOffsetForAddress(2)) 5223 return createError("the note of size 0x" + Twine::utohexstr(Desc.size()) + 5224 " is too short, expected at least 0x" + 5225 Twine::utohexstr(Bytes * 2)); 5226 if (Desc.getData().back() != 0) 5227 return createError("the note is not NUL terminated"); 5228 5229 uint64_t DescOffset = 0; 5230 uint64_t FileCount = Desc.getAddress(&DescOffset); 5231 Ret.PageSize = Desc.getAddress(&DescOffset); 5232 5233 if (!Desc.isValidOffsetForAddress(3 * FileCount * Bytes)) 5234 return createError("unable to read file mappings (found " + 5235 Twine(FileCount) + "): the note of size 0x" + 5236 Twine::utohexstr(Desc.size()) + " is too short"); 5237 5238 uint64_t FilenamesOffset = 0; 5239 DataExtractor Filenames( 5240 Desc.getData().drop_front(DescOffset + 3 * FileCount * Bytes), 5241 Desc.isLittleEndian(), Desc.getAddressSize()); 5242 5243 Ret.Mappings.resize(FileCount); 5244 size_t I = 0; 5245 for (CoreFileMapping &Mapping : Ret.Mappings) { 5246 ++I; 5247 if (!Filenames.isValidOffsetForDataOfSize(FilenamesOffset, 1)) 5248 return createError( 5249 "unable to read the file name for the mapping with index " + 5250 Twine(I) + ": the note of size 0x" + Twine::utohexstr(Desc.size()) + 5251 " is truncated"); 5252 Mapping.Start = Desc.getAddress(&DescOffset); 5253 Mapping.End = Desc.getAddress(&DescOffset); 5254 Mapping.Offset = Desc.getAddress(&DescOffset); 5255 Mapping.Filename = Filenames.getCStrRef(&FilenamesOffset); 5256 } 5257 5258 return Ret; 5259 } 5260 5261 template <typename ELFT> 5262 static void printCoreNote(raw_ostream &OS, const CoreNote &Note) { 5263 // Length of "0x<address>" string. 5264 const int FieldWidth = ELFT::Is64Bits ? 18 : 10; 5265 5266 OS << " Page size: " << format_decimal(Note.PageSize, 0) << '\n'; 5267 OS << " " << right_justify("Start", FieldWidth) << " " 5268 << right_justify("End", FieldWidth) << " " 5269 << right_justify("Page Offset", FieldWidth) << '\n'; 5270 for (const CoreFileMapping &Mapping : Note.Mappings) { 5271 OS << " " << format_hex(Mapping.Start, FieldWidth) << " " 5272 << format_hex(Mapping.End, FieldWidth) << " " 5273 << format_hex(Mapping.Offset, FieldWidth) << "\n " 5274 << Mapping.Filename << '\n'; 5275 } 5276 } 5277 5278 static const NoteType GenericNoteTypes[] = { 5279 {ELF::NT_VERSION, "NT_VERSION (version)"}, 5280 {ELF::NT_ARCH, "NT_ARCH (architecture)"}, 5281 {ELF::NT_GNU_BUILD_ATTRIBUTE_OPEN, "OPEN"}, 5282 {ELF::NT_GNU_BUILD_ATTRIBUTE_FUNC, "func"}, 5283 }; 5284 5285 static const NoteType GNUNoteTypes[] = { 5286 {ELF::NT_GNU_ABI_TAG, "NT_GNU_ABI_TAG (ABI version tag)"}, 5287 {ELF::NT_GNU_HWCAP, "NT_GNU_HWCAP (DSO-supplied software HWCAP info)"}, 5288 {ELF::NT_GNU_BUILD_ID, "NT_GNU_BUILD_ID (unique build ID bitstring)"}, 5289 {ELF::NT_GNU_GOLD_VERSION, "NT_GNU_GOLD_VERSION (gold version)"}, 5290 {ELF::NT_GNU_PROPERTY_TYPE_0, "NT_GNU_PROPERTY_TYPE_0 (property note)"}, 5291 }; 5292 5293 static const NoteType FreeBSDCoreNoteTypes[] = { 5294 {ELF::NT_FREEBSD_THRMISC, "NT_THRMISC (thrmisc structure)"}, 5295 {ELF::NT_FREEBSD_PROCSTAT_PROC, "NT_PROCSTAT_PROC (proc data)"}, 5296 {ELF::NT_FREEBSD_PROCSTAT_FILES, "NT_PROCSTAT_FILES (files data)"}, 5297 {ELF::NT_FREEBSD_PROCSTAT_VMMAP, "NT_PROCSTAT_VMMAP (vmmap data)"}, 5298 {ELF::NT_FREEBSD_PROCSTAT_GROUPS, "NT_PROCSTAT_GROUPS (groups data)"}, 5299 {ELF::NT_FREEBSD_PROCSTAT_UMASK, "NT_PROCSTAT_UMASK (umask data)"}, 5300 {ELF::NT_FREEBSD_PROCSTAT_RLIMIT, "NT_PROCSTAT_RLIMIT (rlimit data)"}, 5301 {ELF::NT_FREEBSD_PROCSTAT_OSREL, "NT_PROCSTAT_OSREL (osreldate data)"}, 5302 {ELF::NT_FREEBSD_PROCSTAT_PSSTRINGS, 5303 "NT_PROCSTAT_PSSTRINGS (ps_strings data)"}, 5304 {ELF::NT_FREEBSD_PROCSTAT_AUXV, "NT_PROCSTAT_AUXV (auxv data)"}, 5305 }; 5306 5307 static const NoteType FreeBSDNoteTypes[] = { 5308 {ELF::NT_FREEBSD_ABI_TAG, "NT_FREEBSD_ABI_TAG (ABI version tag)"}, 5309 {ELF::NT_FREEBSD_NOINIT_TAG, "NT_FREEBSD_NOINIT_TAG (no .init tag)"}, 5310 {ELF::NT_FREEBSD_ARCH_TAG, "NT_FREEBSD_ARCH_TAG (architecture tag)"}, 5311 {ELF::NT_FREEBSD_FEATURE_CTL, 5312 "NT_FREEBSD_FEATURE_CTL (FreeBSD feature control)"}, 5313 }; 5314 5315 static const NoteType AMDNoteTypes[] = { 5316 {ELF::NT_AMD_HSA_CODE_OBJECT_VERSION, 5317 "NT_AMD_HSA_CODE_OBJECT_VERSION (AMD HSA Code Object Version)"}, 5318 {ELF::NT_AMD_HSA_HSAIL, "NT_AMD_HSA_HSAIL (AMD HSA HSAIL Properties)"}, 5319 {ELF::NT_AMD_HSA_ISA_VERSION, "NT_AMD_HSA_ISA_VERSION (AMD HSA ISA Version)"}, 5320 {ELF::NT_AMD_HSA_METADATA, "NT_AMD_HSA_METADATA (AMD HSA Metadata)"}, 5321 {ELF::NT_AMD_HSA_ISA_NAME, "NT_AMD_HSA_ISA_NAME (AMD HSA ISA Name)"}, 5322 {ELF::NT_AMD_PAL_METADATA, "NT_AMD_PAL_METADATA (AMD PAL Metadata)"}, 5323 }; 5324 5325 static const NoteType AMDGPUNoteTypes[] = { 5326 {ELF::NT_AMDGPU_METADATA, "NT_AMDGPU_METADATA (AMDGPU Metadata)"}, 5327 }; 5328 5329 static const NoteType LLVMOMPOFFLOADNoteTypes[] = { 5330 {ELF::NT_LLVM_OPENMP_OFFLOAD_VERSION, 5331 "NT_LLVM_OPENMP_OFFLOAD_VERSION (image format version)"}, 5332 {ELF::NT_LLVM_OPENMP_OFFLOAD_PRODUCER, 5333 "NT_LLVM_OPENMP_OFFLOAD_PRODUCER (producing toolchain)"}, 5334 {ELF::NT_LLVM_OPENMP_OFFLOAD_PRODUCER_VERSION, 5335 "NT_LLVM_OPENMP_OFFLOAD_PRODUCER_VERSION (producing toolchain version)"}, 5336 }; 5337 5338 static const NoteType CoreNoteTypes[] = { 5339 {ELF::NT_PRSTATUS, "NT_PRSTATUS (prstatus structure)"}, 5340 {ELF::NT_FPREGSET, "NT_FPREGSET (floating point registers)"}, 5341 {ELF::NT_PRPSINFO, "NT_PRPSINFO (prpsinfo structure)"}, 5342 {ELF::NT_TASKSTRUCT, "NT_TASKSTRUCT (task structure)"}, 5343 {ELF::NT_AUXV, "NT_AUXV (auxiliary vector)"}, 5344 {ELF::NT_PSTATUS, "NT_PSTATUS (pstatus structure)"}, 5345 {ELF::NT_FPREGS, "NT_FPREGS (floating point registers)"}, 5346 {ELF::NT_PSINFO, "NT_PSINFO (psinfo structure)"}, 5347 {ELF::NT_LWPSTATUS, "NT_LWPSTATUS (lwpstatus_t structure)"}, 5348 {ELF::NT_LWPSINFO, "NT_LWPSINFO (lwpsinfo_t structure)"}, 5349 {ELF::NT_WIN32PSTATUS, "NT_WIN32PSTATUS (win32_pstatus structure)"}, 5350 5351 {ELF::NT_PPC_VMX, "NT_PPC_VMX (ppc Altivec registers)"}, 5352 {ELF::NT_PPC_VSX, "NT_PPC_VSX (ppc VSX registers)"}, 5353 {ELF::NT_PPC_TAR, "NT_PPC_TAR (ppc TAR register)"}, 5354 {ELF::NT_PPC_PPR, "NT_PPC_PPR (ppc PPR register)"}, 5355 {ELF::NT_PPC_DSCR, "NT_PPC_DSCR (ppc DSCR register)"}, 5356 {ELF::NT_PPC_EBB, "NT_PPC_EBB (ppc EBB registers)"}, 5357 {ELF::NT_PPC_PMU, "NT_PPC_PMU (ppc PMU registers)"}, 5358 {ELF::NT_PPC_TM_CGPR, "NT_PPC_TM_CGPR (ppc checkpointed GPR registers)"}, 5359 {ELF::NT_PPC_TM_CFPR, 5360 "NT_PPC_TM_CFPR (ppc checkpointed floating point registers)"}, 5361 {ELF::NT_PPC_TM_CVMX, 5362 "NT_PPC_TM_CVMX (ppc checkpointed Altivec registers)"}, 5363 {ELF::NT_PPC_TM_CVSX, "NT_PPC_TM_CVSX (ppc checkpointed VSX registers)"}, 5364 {ELF::NT_PPC_TM_SPR, "NT_PPC_TM_SPR (ppc TM special purpose registers)"}, 5365 {ELF::NT_PPC_TM_CTAR, "NT_PPC_TM_CTAR (ppc checkpointed TAR register)"}, 5366 {ELF::NT_PPC_TM_CPPR, "NT_PPC_TM_CPPR (ppc checkpointed PPR register)"}, 5367 {ELF::NT_PPC_TM_CDSCR, "NT_PPC_TM_CDSCR (ppc checkpointed DSCR register)"}, 5368 5369 {ELF::NT_386_TLS, "NT_386_TLS (x86 TLS information)"}, 5370 {ELF::NT_386_IOPERM, "NT_386_IOPERM (x86 I/O permissions)"}, 5371 {ELF::NT_X86_XSTATE, "NT_X86_XSTATE (x86 XSAVE extended state)"}, 5372 5373 {ELF::NT_S390_HIGH_GPRS, "NT_S390_HIGH_GPRS (s390 upper register halves)"}, 5374 {ELF::NT_S390_TIMER, "NT_S390_TIMER (s390 timer register)"}, 5375 {ELF::NT_S390_TODCMP, "NT_S390_TODCMP (s390 TOD comparator register)"}, 5376 {ELF::NT_S390_TODPREG, "NT_S390_TODPREG (s390 TOD programmable register)"}, 5377 {ELF::NT_S390_CTRS, "NT_S390_CTRS (s390 control registers)"}, 5378 {ELF::NT_S390_PREFIX, "NT_S390_PREFIX (s390 prefix register)"}, 5379 {ELF::NT_S390_LAST_BREAK, 5380 "NT_S390_LAST_BREAK (s390 last breaking event address)"}, 5381 {ELF::NT_S390_SYSTEM_CALL, 5382 "NT_S390_SYSTEM_CALL (s390 system call restart data)"}, 5383 {ELF::NT_S390_TDB, "NT_S390_TDB (s390 transaction diagnostic block)"}, 5384 {ELF::NT_S390_VXRS_LOW, 5385 "NT_S390_VXRS_LOW (s390 vector registers 0-15 upper half)"}, 5386 {ELF::NT_S390_VXRS_HIGH, "NT_S390_VXRS_HIGH (s390 vector registers 16-31)"}, 5387 {ELF::NT_S390_GS_CB, "NT_S390_GS_CB (s390 guarded-storage registers)"}, 5388 {ELF::NT_S390_GS_BC, 5389 "NT_S390_GS_BC (s390 guarded-storage broadcast control)"}, 5390 5391 {ELF::NT_ARM_VFP, "NT_ARM_VFP (arm VFP registers)"}, 5392 {ELF::NT_ARM_TLS, "NT_ARM_TLS (AArch TLS registers)"}, 5393 {ELF::NT_ARM_HW_BREAK, 5394 "NT_ARM_HW_BREAK (AArch hardware breakpoint registers)"}, 5395 {ELF::NT_ARM_HW_WATCH, 5396 "NT_ARM_HW_WATCH (AArch hardware watchpoint registers)"}, 5397 5398 {ELF::NT_FILE, "NT_FILE (mapped files)"}, 5399 {ELF::NT_PRXFPREG, "NT_PRXFPREG (user_xfpregs structure)"}, 5400 {ELF::NT_SIGINFO, "NT_SIGINFO (siginfo_t data)"}, 5401 }; 5402 5403 template <class ELFT> 5404 StringRef getNoteTypeName(const typename ELFT::Note &Note, unsigned ELFType) { 5405 uint32_t Type = Note.getType(); 5406 auto FindNote = [&](ArrayRef<NoteType> V) -> StringRef { 5407 for (const NoteType &N : V) 5408 if (N.ID == Type) 5409 return N.Name; 5410 return ""; 5411 }; 5412 5413 StringRef Name = Note.getName(); 5414 if (Name == "GNU") 5415 return FindNote(GNUNoteTypes); 5416 if (Name == "FreeBSD") { 5417 if (ELFType == ELF::ET_CORE) { 5418 // FreeBSD also places the generic core notes in the FreeBSD namespace. 5419 StringRef Result = FindNote(FreeBSDCoreNoteTypes); 5420 if (!Result.empty()) 5421 return Result; 5422 return FindNote(CoreNoteTypes); 5423 } else { 5424 return FindNote(FreeBSDNoteTypes); 5425 } 5426 } 5427 if (Name == "AMD") 5428 return FindNote(AMDNoteTypes); 5429 if (Name == "AMDGPU") 5430 return FindNote(AMDGPUNoteTypes); 5431 if (Name == "LLVMOMPOFFLOAD") 5432 return FindNote(LLVMOMPOFFLOADNoteTypes); 5433 5434 if (ELFType == ELF::ET_CORE) 5435 return FindNote(CoreNoteTypes); 5436 return FindNote(GenericNoteTypes); 5437 } 5438 5439 template <class ELFT> 5440 static void printNotesHelper( 5441 const ELFDumper<ELFT> &Dumper, 5442 llvm::function_ref<void(Optional<StringRef>, typename ELFT::Off, 5443 typename ELFT::Addr)> 5444 StartNotesFn, 5445 llvm::function_ref<Error(const typename ELFT::Note &, bool)> ProcessNoteFn, 5446 llvm::function_ref<void()> FinishNotesFn) { 5447 const ELFFile<ELFT> &Obj = Dumper.getElfObject().getELFFile(); 5448 bool IsCoreFile = Obj.getHeader().e_type == ELF::ET_CORE; 5449 5450 ArrayRef<typename ELFT::Shdr> Sections = cantFail(Obj.sections()); 5451 if (!IsCoreFile && !Sections.empty()) { 5452 for (const typename ELFT::Shdr &S : Sections) { 5453 if (S.sh_type != SHT_NOTE) 5454 continue; 5455 StartNotesFn(expectedToOptional(Obj.getSectionName(S)), S.sh_offset, 5456 S.sh_size); 5457 Error Err = Error::success(); 5458 size_t I = 0; 5459 for (const typename ELFT::Note Note : Obj.notes(S, Err)) { 5460 if (Error E = ProcessNoteFn(Note, IsCoreFile)) 5461 Dumper.reportUniqueWarning( 5462 "unable to read note with index " + Twine(I) + " from the " + 5463 describe(Obj, S) + ": " + toString(std::move(E))); 5464 ++I; 5465 } 5466 if (Err) 5467 Dumper.reportUniqueWarning("unable to read notes from the " + 5468 describe(Obj, S) + ": " + 5469 toString(std::move(Err))); 5470 FinishNotesFn(); 5471 } 5472 return; 5473 } 5474 5475 Expected<ArrayRef<typename ELFT::Phdr>> PhdrsOrErr = Obj.program_headers(); 5476 if (!PhdrsOrErr) { 5477 Dumper.reportUniqueWarning( 5478 "unable to read program headers to locate the PT_NOTE segment: " + 5479 toString(PhdrsOrErr.takeError())); 5480 return; 5481 } 5482 5483 for (size_t I = 0, E = (*PhdrsOrErr).size(); I != E; ++I) { 5484 const typename ELFT::Phdr &P = (*PhdrsOrErr)[I]; 5485 if (P.p_type != PT_NOTE) 5486 continue; 5487 StartNotesFn(/*SecName=*/None, P.p_offset, P.p_filesz); 5488 Error Err = Error::success(); 5489 size_t Index = 0; 5490 for (const typename ELFT::Note Note : Obj.notes(P, Err)) { 5491 if (Error E = ProcessNoteFn(Note, IsCoreFile)) 5492 Dumper.reportUniqueWarning("unable to read note with index " + 5493 Twine(Index) + 5494 " from the PT_NOTE segment with index " + 5495 Twine(I) + ": " + toString(std::move(E))); 5496 ++Index; 5497 } 5498 if (Err) 5499 Dumper.reportUniqueWarning( 5500 "unable to read notes from the PT_NOTE segment with index " + 5501 Twine(I) + ": " + toString(std::move(Err))); 5502 FinishNotesFn(); 5503 } 5504 } 5505 5506 template <class ELFT> void GNUELFDumper<ELFT>::printNotes() { 5507 bool IsFirstHeader = true; 5508 auto PrintHeader = [&](Optional<StringRef> SecName, 5509 const typename ELFT::Off Offset, 5510 const typename ELFT::Addr Size) { 5511 // Print a newline between notes sections to match GNU readelf. 5512 if (!IsFirstHeader) { 5513 OS << '\n'; 5514 } else { 5515 IsFirstHeader = false; 5516 } 5517 5518 OS << "Displaying notes found "; 5519 5520 if (SecName) 5521 OS << "in: " << *SecName << "\n"; 5522 else 5523 OS << "at file offset " << format_hex(Offset, 10) << " with length " 5524 << format_hex(Size, 10) << ":\n"; 5525 5526 OS << " Owner Data size \tDescription\n"; 5527 }; 5528 5529 auto ProcessNote = [&](const Elf_Note &Note, bool IsCore) -> Error { 5530 StringRef Name = Note.getName(); 5531 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 5532 Elf_Word Type = Note.getType(); 5533 5534 // Print the note owner/type. 5535 OS << " " << left_justify(Name, 20) << ' ' 5536 << format_hex(Descriptor.size(), 10) << '\t'; 5537 5538 StringRef NoteType = 5539 getNoteTypeName<ELFT>(Note, this->Obj.getHeader().e_type); 5540 if (!NoteType.empty()) 5541 OS << NoteType << '\n'; 5542 else 5543 OS << "Unknown note type: (" << format_hex(Type, 10) << ")\n"; 5544 5545 // Print the description, or fallback to printing raw bytes for unknown 5546 // owners/if we fail to pretty-print the contents. 5547 if (Name == "GNU") { 5548 if (printGNUNote<ELFT>(OS, Type, Descriptor)) 5549 return Error::success(); 5550 } else if (Name == "FreeBSD") { 5551 if (Optional<FreeBSDNote> N = 5552 getFreeBSDNote<ELFT>(Type, Descriptor, IsCore)) { 5553 OS << " " << N->Type << ": " << N->Value << '\n'; 5554 return Error::success(); 5555 } 5556 } else if (Name == "AMD") { 5557 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 5558 if (!N.Type.empty()) { 5559 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5560 return Error::success(); 5561 } 5562 } else if (Name == "AMDGPU") { 5563 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 5564 if (!N.Type.empty()) { 5565 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5566 return Error::success(); 5567 } 5568 } else if (Name == "LLVMOMPOFFLOAD") { 5569 if (printLLVMOMPOFFLOADNote<ELFT>(OS, Type, Descriptor)) 5570 return Error::success(); 5571 } else if (Name == "CORE") { 5572 if (Type == ELF::NT_FILE) { 5573 DataExtractor DescExtractor(Descriptor, 5574 ELFT::TargetEndianness == support::little, 5575 sizeof(Elf_Addr)); 5576 if (Expected<CoreNote> NoteOrErr = readCoreNote(DescExtractor)) { 5577 printCoreNote<ELFT>(OS, *NoteOrErr); 5578 return Error::success(); 5579 } else { 5580 return NoteOrErr.takeError(); 5581 } 5582 } 5583 } 5584 if (!Descriptor.empty()) { 5585 OS << " description data:"; 5586 for (uint8_t B : Descriptor) 5587 OS << " " << format("%02x", B); 5588 OS << '\n'; 5589 } 5590 return Error::success(); 5591 }; 5592 5593 printNotesHelper(*this, PrintHeader, ProcessNote, []() {}); 5594 } 5595 5596 template <class ELFT> void GNUELFDumper<ELFT>::printELFLinkerOptions() { 5597 OS << "printELFLinkerOptions not implemented!\n"; 5598 } 5599 5600 template <class ELFT> 5601 void ELFDumper<ELFT>::printDependentLibsHelper( 5602 function_ref<void(const Elf_Shdr &)> OnSectionStart, 5603 function_ref<void(StringRef, uint64_t)> OnLibEntry) { 5604 auto Warn = [this](unsigned SecNdx, StringRef Msg) { 5605 this->reportUniqueWarning("SHT_LLVM_DEPENDENT_LIBRARIES section at index " + 5606 Twine(SecNdx) + " is broken: " + Msg); 5607 }; 5608 5609 unsigned I = -1; 5610 for (const Elf_Shdr &Shdr : cantFail(Obj.sections())) { 5611 ++I; 5612 if (Shdr.sh_type != ELF::SHT_LLVM_DEPENDENT_LIBRARIES) 5613 continue; 5614 5615 OnSectionStart(Shdr); 5616 5617 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj.getSectionContents(Shdr); 5618 if (!ContentsOrErr) { 5619 Warn(I, toString(ContentsOrErr.takeError())); 5620 continue; 5621 } 5622 5623 ArrayRef<uint8_t> Contents = *ContentsOrErr; 5624 if (!Contents.empty() && Contents.back() != 0) { 5625 Warn(I, "the content is not null-terminated"); 5626 continue; 5627 } 5628 5629 for (const uint8_t *I = Contents.begin(), *E = Contents.end(); I < E;) { 5630 StringRef Lib((const char *)I); 5631 OnLibEntry(Lib, I - Contents.begin()); 5632 I += Lib.size() + 1; 5633 } 5634 } 5635 } 5636 5637 template <class ELFT> 5638 void ELFDumper<ELFT>::forEachRelocationDo( 5639 const Elf_Shdr &Sec, bool RawRelr, 5640 llvm::function_ref<void(const Relocation<ELFT> &, unsigned, 5641 const Elf_Shdr &, const Elf_Shdr *)> 5642 RelRelaFn, 5643 llvm::function_ref<void(const Elf_Relr &)> RelrFn) { 5644 auto Warn = [&](Error &&E, 5645 const Twine &Prefix = "unable to read relocations from") { 5646 this->reportUniqueWarning(Prefix + " " + describe(Sec) + ": " + 5647 toString(std::move(E))); 5648 }; 5649 5650 // SHT_RELR/SHT_ANDROID_RELR sections do not have an associated symbol table. 5651 // For them we should not treat the value of the sh_link field as an index of 5652 // a symbol table. 5653 const Elf_Shdr *SymTab; 5654 if (Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_RELR) { 5655 Expected<const Elf_Shdr *> SymTabOrErr = Obj.getSection(Sec.sh_link); 5656 if (!SymTabOrErr) { 5657 Warn(SymTabOrErr.takeError(), "unable to locate a symbol table for"); 5658 return; 5659 } 5660 SymTab = *SymTabOrErr; 5661 } 5662 5663 unsigned RelNdx = 0; 5664 const bool IsMips64EL = this->Obj.isMips64EL(); 5665 switch (Sec.sh_type) { 5666 case ELF::SHT_REL: 5667 if (Expected<Elf_Rel_Range> RangeOrErr = Obj.rels(Sec)) { 5668 for (const Elf_Rel &R : *RangeOrErr) 5669 RelRelaFn(Relocation<ELFT>(R, IsMips64EL), RelNdx++, Sec, SymTab); 5670 } else { 5671 Warn(RangeOrErr.takeError()); 5672 } 5673 break; 5674 case ELF::SHT_RELA: 5675 if (Expected<Elf_Rela_Range> RangeOrErr = Obj.relas(Sec)) { 5676 for (const Elf_Rela &R : *RangeOrErr) 5677 RelRelaFn(Relocation<ELFT>(R, IsMips64EL), RelNdx++, Sec, SymTab); 5678 } else { 5679 Warn(RangeOrErr.takeError()); 5680 } 5681 break; 5682 case ELF::SHT_RELR: 5683 case ELF::SHT_ANDROID_RELR: { 5684 Expected<Elf_Relr_Range> RangeOrErr = Obj.relrs(Sec); 5685 if (!RangeOrErr) { 5686 Warn(RangeOrErr.takeError()); 5687 break; 5688 } 5689 if (RawRelr) { 5690 for (const Elf_Relr &R : *RangeOrErr) 5691 RelrFn(R); 5692 break; 5693 } 5694 5695 for (const Elf_Rel &R : Obj.decode_relrs(*RangeOrErr)) 5696 RelRelaFn(Relocation<ELFT>(R, IsMips64EL), RelNdx++, Sec, 5697 /*SymTab=*/nullptr); 5698 break; 5699 } 5700 case ELF::SHT_ANDROID_REL: 5701 case ELF::SHT_ANDROID_RELA: 5702 if (Expected<std::vector<Elf_Rela>> RelasOrErr = Obj.android_relas(Sec)) { 5703 for (const Elf_Rela &R : *RelasOrErr) 5704 RelRelaFn(Relocation<ELFT>(R, IsMips64EL), RelNdx++, Sec, SymTab); 5705 } else { 5706 Warn(RelasOrErr.takeError()); 5707 } 5708 break; 5709 } 5710 } 5711 5712 template <class ELFT> 5713 StringRef ELFDumper<ELFT>::getPrintableSectionName(const Elf_Shdr &Sec) const { 5714 StringRef Name = "<?>"; 5715 if (Expected<StringRef> SecNameOrErr = 5716 Obj.getSectionName(Sec, this->WarningHandler)) 5717 Name = *SecNameOrErr; 5718 else 5719 this->reportUniqueWarning("unable to get the name of " + describe(Sec) + 5720 ": " + toString(SecNameOrErr.takeError())); 5721 return Name; 5722 } 5723 5724 template <class ELFT> void GNUELFDumper<ELFT>::printDependentLibs() { 5725 bool SectionStarted = false; 5726 struct NameOffset { 5727 StringRef Name; 5728 uint64_t Offset; 5729 }; 5730 std::vector<NameOffset> SecEntries; 5731 NameOffset Current; 5732 auto PrintSection = [&]() { 5733 OS << "Dependent libraries section " << Current.Name << " at offset " 5734 << format_hex(Current.Offset, 1) << " contains " << SecEntries.size() 5735 << " entries:\n"; 5736 for (NameOffset Entry : SecEntries) 5737 OS << " [" << format("%6" PRIx64, Entry.Offset) << "] " << Entry.Name 5738 << "\n"; 5739 OS << "\n"; 5740 SecEntries.clear(); 5741 }; 5742 5743 auto OnSectionStart = [&](const Elf_Shdr &Shdr) { 5744 if (SectionStarted) 5745 PrintSection(); 5746 SectionStarted = true; 5747 Current.Offset = Shdr.sh_offset; 5748 Current.Name = this->getPrintableSectionName(Shdr); 5749 }; 5750 auto OnLibEntry = [&](StringRef Lib, uint64_t Offset) { 5751 SecEntries.push_back(NameOffset{Lib, Offset}); 5752 }; 5753 5754 this->printDependentLibsHelper(OnSectionStart, OnLibEntry); 5755 if (SectionStarted) 5756 PrintSection(); 5757 } 5758 5759 template <class ELFT> 5760 SmallVector<uint32_t> ELFDumper<ELFT>::getSymbolIndexesForFunctionAddress( 5761 uint64_t SymValue, Optional<const Elf_Shdr *> FunctionSec) { 5762 SmallVector<uint32_t> SymbolIndexes; 5763 if (!this->AddressToIndexMap.hasValue()) { 5764 // Populate the address to index map upon the first invocation of this 5765 // function. 5766 this->AddressToIndexMap.emplace(); 5767 if (this->DotSymtabSec) { 5768 if (Expected<Elf_Sym_Range> SymsOrError = 5769 Obj.symbols(this->DotSymtabSec)) { 5770 uint32_t Index = (uint32_t)-1; 5771 for (const Elf_Sym &Sym : *SymsOrError) { 5772 ++Index; 5773 5774 if (Sym.st_shndx == ELF::SHN_UNDEF || Sym.getType() != ELF::STT_FUNC) 5775 continue; 5776 5777 Expected<uint64_t> SymAddrOrErr = 5778 ObjF.toSymbolRef(this->DotSymtabSec, Index).getAddress(); 5779 if (!SymAddrOrErr) { 5780 std::string Name = this->getStaticSymbolName(Index); 5781 reportUniqueWarning("unable to get address of symbol '" + Name + 5782 "': " + toString(SymAddrOrErr.takeError())); 5783 return SymbolIndexes; 5784 } 5785 5786 (*this->AddressToIndexMap)[*SymAddrOrErr].push_back(Index); 5787 } 5788 } else { 5789 reportUniqueWarning("unable to read the symbol table: " + 5790 toString(SymsOrError.takeError())); 5791 } 5792 } 5793 } 5794 5795 auto Symbols = this->AddressToIndexMap->find(SymValue); 5796 if (Symbols == this->AddressToIndexMap->end()) 5797 return SymbolIndexes; 5798 5799 for (uint32_t Index : Symbols->second) { 5800 // Check if the symbol is in the right section. FunctionSec == None 5801 // means "any section". 5802 if (FunctionSec) { 5803 const Elf_Sym &Sym = *cantFail(Obj.getSymbol(this->DotSymtabSec, Index)); 5804 if (Expected<const Elf_Shdr *> SecOrErr = 5805 Obj.getSection(Sym, this->DotSymtabSec, 5806 this->getShndxTable(this->DotSymtabSec))) { 5807 if (*FunctionSec != *SecOrErr) 5808 continue; 5809 } else { 5810 std::string Name = this->getStaticSymbolName(Index); 5811 // Note: it is impossible to trigger this error currently, it is 5812 // untested. 5813 reportUniqueWarning("unable to get section of symbol '" + Name + 5814 "': " + toString(SecOrErr.takeError())); 5815 return SymbolIndexes; 5816 } 5817 } 5818 5819 SymbolIndexes.push_back(Index); 5820 } 5821 5822 return SymbolIndexes; 5823 } 5824 5825 template <class ELFT> 5826 bool ELFDumper<ELFT>::printFunctionStackSize( 5827 uint64_t SymValue, Optional<const Elf_Shdr *> FunctionSec, 5828 const Elf_Shdr &StackSizeSec, DataExtractor Data, uint64_t *Offset) { 5829 SmallVector<uint32_t> FuncSymIndexes = 5830 this->getSymbolIndexesForFunctionAddress(SymValue, FunctionSec); 5831 if (FuncSymIndexes.empty()) 5832 reportUniqueWarning( 5833 "could not identify function symbol for stack size entry in " + 5834 describe(StackSizeSec)); 5835 5836 // Extract the size. The expectation is that Offset is pointing to the right 5837 // place, i.e. past the function address. 5838 Error Err = Error::success(); 5839 uint64_t StackSize = Data.getULEB128(Offset, &Err); 5840 if (Err) { 5841 reportUniqueWarning("could not extract a valid stack size from " + 5842 describe(StackSizeSec) + ": " + 5843 toString(std::move(Err))); 5844 return false; 5845 } 5846 5847 if (FuncSymIndexes.empty()) { 5848 printStackSizeEntry(StackSize, {"?"}); 5849 } else { 5850 SmallVector<std::string> FuncSymNames; 5851 for (uint32_t Index : FuncSymIndexes) 5852 FuncSymNames.push_back(this->getStaticSymbolName(Index)); 5853 printStackSizeEntry(StackSize, FuncSymNames); 5854 } 5855 5856 return true; 5857 } 5858 5859 template <class ELFT> 5860 void GNUELFDumper<ELFT>::printStackSizeEntry(uint64_t Size, 5861 ArrayRef<std::string> FuncNames) { 5862 OS.PadToColumn(2); 5863 OS << format_decimal(Size, 11); 5864 OS.PadToColumn(18); 5865 5866 OS << join(FuncNames.begin(), FuncNames.end(), ", ") << "\n"; 5867 } 5868 5869 template <class ELFT> 5870 void ELFDumper<ELFT>::printStackSize(const Relocation<ELFT> &R, 5871 const Elf_Shdr &RelocSec, unsigned Ndx, 5872 const Elf_Shdr *SymTab, 5873 const Elf_Shdr *FunctionSec, 5874 const Elf_Shdr &StackSizeSec, 5875 const RelocationResolver &Resolver, 5876 DataExtractor Data) { 5877 // This function ignores potentially erroneous input, unless it is directly 5878 // related to stack size reporting. 5879 const Elf_Sym *Sym = nullptr; 5880 Expected<RelSymbol<ELFT>> TargetOrErr = this->getRelocationTarget(R, SymTab); 5881 if (!TargetOrErr) 5882 reportUniqueWarning("unable to get the target of relocation with index " + 5883 Twine(Ndx) + " in " + describe(RelocSec) + ": " + 5884 toString(TargetOrErr.takeError())); 5885 else 5886 Sym = TargetOrErr->Sym; 5887 5888 uint64_t RelocSymValue = 0; 5889 if (Sym) { 5890 Expected<const Elf_Shdr *> SectionOrErr = 5891 this->Obj.getSection(*Sym, SymTab, this->getShndxTable(SymTab)); 5892 if (!SectionOrErr) { 5893 reportUniqueWarning( 5894 "cannot identify the section for relocation symbol '" + 5895 (*TargetOrErr).Name + "': " + toString(SectionOrErr.takeError())); 5896 } else if (*SectionOrErr != FunctionSec) { 5897 reportUniqueWarning("relocation symbol '" + (*TargetOrErr).Name + 5898 "' is not in the expected section"); 5899 // Pretend that the symbol is in the correct section and report its 5900 // stack size anyway. 5901 FunctionSec = *SectionOrErr; 5902 } 5903 5904 RelocSymValue = Sym->st_value; 5905 } 5906 5907 uint64_t Offset = R.Offset; 5908 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) { 5909 reportUniqueWarning("found invalid relocation offset (0x" + 5910 Twine::utohexstr(Offset) + ") into " + 5911 describe(StackSizeSec) + 5912 " while trying to extract a stack size entry"); 5913 return; 5914 } 5915 5916 uint64_t SymValue = 5917 Resolver(R.Type, Offset, RelocSymValue, Data.getAddress(&Offset), 5918 R.Addend.getValueOr(0)); 5919 this->printFunctionStackSize(SymValue, FunctionSec, StackSizeSec, Data, 5920 &Offset); 5921 } 5922 5923 template <class ELFT> 5924 void ELFDumper<ELFT>::printNonRelocatableStackSizes( 5925 std::function<void()> PrintHeader) { 5926 // This function ignores potentially erroneous input, unless it is directly 5927 // related to stack size reporting. 5928 for (const Elf_Shdr &Sec : cantFail(Obj.sections())) { 5929 if (this->getPrintableSectionName(Sec) != ".stack_sizes") 5930 continue; 5931 PrintHeader(); 5932 ArrayRef<uint8_t> Contents = 5933 unwrapOrError(this->FileName, Obj.getSectionContents(Sec)); 5934 DataExtractor Data(Contents, Obj.isLE(), sizeof(Elf_Addr)); 5935 uint64_t Offset = 0; 5936 while (Offset < Contents.size()) { 5937 // The function address is followed by a ULEB representing the stack 5938 // size. Check for an extra byte before we try to process the entry. 5939 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) { 5940 reportUniqueWarning( 5941 describe(Sec) + 5942 " ended while trying to extract a stack size entry"); 5943 break; 5944 } 5945 uint64_t SymValue = Data.getAddress(&Offset); 5946 if (!printFunctionStackSize(SymValue, /*FunctionSec=*/None, Sec, Data, 5947 &Offset)) 5948 break; 5949 } 5950 } 5951 } 5952 5953 template <class ELFT> 5954 void ELFDumper<ELFT>::getSectionAndRelocations( 5955 std::function<bool(const Elf_Shdr &)> IsMatch, 5956 llvm::MapVector<const Elf_Shdr *, const Elf_Shdr *> &SecToRelocMap) { 5957 for (const Elf_Shdr &Sec : cantFail(Obj.sections())) { 5958 if (IsMatch(Sec)) 5959 if (SecToRelocMap.insert(std::make_pair(&Sec, (const Elf_Shdr *)nullptr)) 5960 .second) 5961 continue; 5962 5963 if (Sec.sh_type != ELF::SHT_RELA && Sec.sh_type != ELF::SHT_REL) 5964 continue; 5965 5966 Expected<const Elf_Shdr *> RelSecOrErr = Obj.getSection(Sec.sh_info); 5967 if (!RelSecOrErr) { 5968 reportUniqueWarning(describe(Sec) + 5969 ": failed to get a relocated section: " + 5970 toString(RelSecOrErr.takeError())); 5971 continue; 5972 } 5973 const Elf_Shdr *ContentsSec = *RelSecOrErr; 5974 if (IsMatch(*ContentsSec)) 5975 SecToRelocMap[ContentsSec] = &Sec; 5976 } 5977 } 5978 5979 template <class ELFT> 5980 void ELFDumper<ELFT>::printRelocatableStackSizes( 5981 std::function<void()> PrintHeader) { 5982 // Build a map between stack size sections and their corresponding relocation 5983 // sections. 5984 llvm::MapVector<const Elf_Shdr *, const Elf_Shdr *> StackSizeRelocMap; 5985 auto IsMatch = [&](const Elf_Shdr &Sec) -> bool { 5986 StringRef SectionName; 5987 if (Expected<StringRef> NameOrErr = Obj.getSectionName(Sec)) 5988 SectionName = *NameOrErr; 5989 else 5990 consumeError(NameOrErr.takeError()); 5991 5992 return SectionName == ".stack_sizes"; 5993 }; 5994 getSectionAndRelocations(IsMatch, StackSizeRelocMap); 5995 5996 for (const auto &StackSizeMapEntry : StackSizeRelocMap) { 5997 PrintHeader(); 5998 const Elf_Shdr *StackSizesELFSec = StackSizeMapEntry.first; 5999 const Elf_Shdr *RelocSec = StackSizeMapEntry.second; 6000 6001 // Warn about stack size sections without a relocation section. 6002 if (!RelocSec) { 6003 reportWarning(createError(".stack_sizes (" + describe(*StackSizesELFSec) + 6004 ") does not have a corresponding " 6005 "relocation section"), 6006 FileName); 6007 continue; 6008 } 6009 6010 // A .stack_sizes section header's sh_link field is supposed to point 6011 // to the section that contains the functions whose stack sizes are 6012 // described in it. 6013 const Elf_Shdr *FunctionSec = unwrapOrError( 6014 this->FileName, Obj.getSection(StackSizesELFSec->sh_link)); 6015 6016 SupportsRelocation IsSupportedFn; 6017 RelocationResolver Resolver; 6018 std::tie(IsSupportedFn, Resolver) = getRelocationResolver(this->ObjF); 6019 ArrayRef<uint8_t> Contents = 6020 unwrapOrError(this->FileName, Obj.getSectionContents(*StackSizesELFSec)); 6021 DataExtractor Data(Contents, Obj.isLE(), sizeof(Elf_Addr)); 6022 6023 forEachRelocationDo( 6024 *RelocSec, /*RawRelr=*/false, 6025 [&](const Relocation<ELFT> &R, unsigned Ndx, const Elf_Shdr &Sec, 6026 const Elf_Shdr *SymTab) { 6027 if (!IsSupportedFn || !IsSupportedFn(R.Type)) { 6028 reportUniqueWarning( 6029 describe(*RelocSec) + 6030 " contains an unsupported relocation with index " + Twine(Ndx) + 6031 ": " + Obj.getRelocationTypeName(R.Type)); 6032 return; 6033 } 6034 6035 this->printStackSize(R, *RelocSec, Ndx, SymTab, FunctionSec, 6036 *StackSizesELFSec, Resolver, Data); 6037 }, 6038 [](const Elf_Relr &) { 6039 llvm_unreachable("can't get here, because we only support " 6040 "SHT_REL/SHT_RELA sections"); 6041 }); 6042 } 6043 } 6044 6045 template <class ELFT> 6046 void GNUELFDumper<ELFT>::printStackSizes() { 6047 bool HeaderHasBeenPrinted = false; 6048 auto PrintHeader = [&]() { 6049 if (HeaderHasBeenPrinted) 6050 return; 6051 OS << "\nStack Sizes:\n"; 6052 OS.PadToColumn(9); 6053 OS << "Size"; 6054 OS.PadToColumn(18); 6055 OS << "Functions\n"; 6056 HeaderHasBeenPrinted = true; 6057 }; 6058 6059 // For non-relocatable objects, look directly for sections whose name starts 6060 // with .stack_sizes and process the contents. 6061 if (this->Obj.getHeader().e_type == ELF::ET_REL) 6062 this->printRelocatableStackSizes(PrintHeader); 6063 else 6064 this->printNonRelocatableStackSizes(PrintHeader); 6065 } 6066 6067 template <class ELFT> 6068 void GNUELFDumper<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 6069 size_t Bias = ELFT::Is64Bits ? 8 : 0; 6070 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 6071 OS.PadToColumn(2); 6072 OS << format_hex_no_prefix(Parser.getGotAddress(E), 8 + Bias); 6073 OS.PadToColumn(11 + Bias); 6074 OS << format_decimal(Parser.getGotOffset(E), 6) << "(gp)"; 6075 OS.PadToColumn(22 + Bias); 6076 OS << format_hex_no_prefix(*E, 8 + Bias); 6077 OS.PadToColumn(31 + 2 * Bias); 6078 OS << Purpose << "\n"; 6079 }; 6080 6081 OS << (Parser.IsStatic ? "Static GOT:\n" : "Primary GOT:\n"); 6082 OS << " Canonical gp value: " 6083 << format_hex_no_prefix(Parser.getGp(), 8 + Bias) << "\n\n"; 6084 6085 OS << " Reserved entries:\n"; 6086 if (ELFT::Is64Bits) 6087 OS << " Address Access Initial Purpose\n"; 6088 else 6089 OS << " Address Access Initial Purpose\n"; 6090 PrintEntry(Parser.getGotLazyResolver(), "Lazy resolver"); 6091 if (Parser.getGotModulePointer()) 6092 PrintEntry(Parser.getGotModulePointer(), "Module pointer (GNU extension)"); 6093 6094 if (!Parser.getLocalEntries().empty()) { 6095 OS << "\n"; 6096 OS << " Local entries:\n"; 6097 if (ELFT::Is64Bits) 6098 OS << " Address Access Initial\n"; 6099 else 6100 OS << " Address Access Initial\n"; 6101 for (auto &E : Parser.getLocalEntries()) 6102 PrintEntry(&E, ""); 6103 } 6104 6105 if (Parser.IsStatic) 6106 return; 6107 6108 if (!Parser.getGlobalEntries().empty()) { 6109 OS << "\n"; 6110 OS << " Global entries:\n"; 6111 if (ELFT::Is64Bits) 6112 OS << " Address Access Initial Sym.Val." 6113 << " Type Ndx Name\n"; 6114 else 6115 OS << " Address Access Initial Sym.Val. Type Ndx Name\n"; 6116 6117 DataRegion<Elf_Word> ShndxTable( 6118 (const Elf_Word *)this->DynSymTabShndxRegion.Addr, this->Obj.end()); 6119 for (auto &E : Parser.getGlobalEntries()) { 6120 const Elf_Sym &Sym = *Parser.getGotSym(&E); 6121 const Elf_Sym &FirstSym = this->dynamic_symbols()[0]; 6122 std::string SymName = this->getFullSymbolName( 6123 Sym, &Sym - &FirstSym, ShndxTable, this->DynamicStringTable, false); 6124 6125 OS.PadToColumn(2); 6126 OS << to_string(format_hex_no_prefix(Parser.getGotAddress(&E), 8 + Bias)); 6127 OS.PadToColumn(11 + Bias); 6128 OS << to_string(format_decimal(Parser.getGotOffset(&E), 6)) + "(gp)"; 6129 OS.PadToColumn(22 + Bias); 6130 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 6131 OS.PadToColumn(31 + 2 * Bias); 6132 OS << to_string(format_hex_no_prefix(Sym.st_value, 8 + Bias)); 6133 OS.PadToColumn(40 + 3 * Bias); 6134 OS << printEnum(Sym.getType(), makeArrayRef(ElfSymbolTypes)); 6135 OS.PadToColumn(48 + 3 * Bias); 6136 OS << getSymbolSectionNdx(Sym, &Sym - this->dynamic_symbols().begin(), 6137 ShndxTable); 6138 OS.PadToColumn(52 + 3 * Bias); 6139 OS << SymName << "\n"; 6140 } 6141 } 6142 6143 if (!Parser.getOtherEntries().empty()) 6144 OS << "\n Number of TLS and multi-GOT entries " 6145 << Parser.getOtherEntries().size() << "\n"; 6146 } 6147 6148 template <class ELFT> 6149 void GNUELFDumper<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 6150 size_t Bias = ELFT::Is64Bits ? 8 : 0; 6151 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 6152 OS.PadToColumn(2); 6153 OS << format_hex_no_prefix(Parser.getPltAddress(E), 8 + Bias); 6154 OS.PadToColumn(11 + Bias); 6155 OS << format_hex_no_prefix(*E, 8 + Bias); 6156 OS.PadToColumn(20 + 2 * Bias); 6157 OS << Purpose << "\n"; 6158 }; 6159 6160 OS << "PLT GOT:\n\n"; 6161 6162 OS << " Reserved entries:\n"; 6163 OS << " Address Initial Purpose\n"; 6164 PrintEntry(Parser.getPltLazyResolver(), "PLT lazy resolver"); 6165 if (Parser.getPltModulePointer()) 6166 PrintEntry(Parser.getPltModulePointer(), "Module pointer"); 6167 6168 if (!Parser.getPltEntries().empty()) { 6169 OS << "\n"; 6170 OS << " Entries:\n"; 6171 OS << " Address Initial Sym.Val. Type Ndx Name\n"; 6172 DataRegion<Elf_Word> ShndxTable( 6173 (const Elf_Word *)this->DynSymTabShndxRegion.Addr, this->Obj.end()); 6174 for (auto &E : Parser.getPltEntries()) { 6175 const Elf_Sym &Sym = *Parser.getPltSym(&E); 6176 const Elf_Sym &FirstSym = *cantFail( 6177 this->Obj.template getEntry<Elf_Sym>(*Parser.getPltSymTable(), 0)); 6178 std::string SymName = this->getFullSymbolName( 6179 Sym, &Sym - &FirstSym, ShndxTable, this->DynamicStringTable, false); 6180 6181 OS.PadToColumn(2); 6182 OS << to_string(format_hex_no_prefix(Parser.getPltAddress(&E), 8 + Bias)); 6183 OS.PadToColumn(11 + Bias); 6184 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 6185 OS.PadToColumn(20 + 2 * Bias); 6186 OS << to_string(format_hex_no_prefix(Sym.st_value, 8 + Bias)); 6187 OS.PadToColumn(29 + 3 * Bias); 6188 OS << printEnum(Sym.getType(), makeArrayRef(ElfSymbolTypes)); 6189 OS.PadToColumn(37 + 3 * Bias); 6190 OS << getSymbolSectionNdx(Sym, &Sym - this->dynamic_symbols().begin(), 6191 ShndxTable); 6192 OS.PadToColumn(41 + 3 * Bias); 6193 OS << SymName << "\n"; 6194 } 6195 } 6196 } 6197 6198 template <class ELFT> 6199 Expected<const Elf_Mips_ABIFlags<ELFT> *> 6200 getMipsAbiFlagsSection(const ELFDumper<ELFT> &Dumper) { 6201 const typename ELFT::Shdr *Sec = Dumper.findSectionByName(".MIPS.abiflags"); 6202 if (Sec == nullptr) 6203 return nullptr; 6204 6205 constexpr StringRef ErrPrefix = "unable to read the .MIPS.abiflags section: "; 6206 Expected<ArrayRef<uint8_t>> DataOrErr = 6207 Dumper.getElfObject().getELFFile().getSectionContents(*Sec); 6208 if (!DataOrErr) 6209 return createError(ErrPrefix + toString(DataOrErr.takeError())); 6210 6211 if (DataOrErr->size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) 6212 return createError(ErrPrefix + "it has a wrong size (" + 6213 Twine(DataOrErr->size()) + ")"); 6214 return reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(DataOrErr->data()); 6215 } 6216 6217 template <class ELFT> void GNUELFDumper<ELFT>::printMipsABIFlags() { 6218 const Elf_Mips_ABIFlags<ELFT> *Flags = nullptr; 6219 if (Expected<const Elf_Mips_ABIFlags<ELFT> *> SecOrErr = 6220 getMipsAbiFlagsSection(*this)) 6221 Flags = *SecOrErr; 6222 else 6223 this->reportUniqueWarning(SecOrErr.takeError()); 6224 if (!Flags) 6225 return; 6226 6227 OS << "MIPS ABI Flags Version: " << Flags->version << "\n\n"; 6228 OS << "ISA: MIPS" << int(Flags->isa_level); 6229 if (Flags->isa_rev > 1) 6230 OS << "r" << int(Flags->isa_rev); 6231 OS << "\n"; 6232 OS << "GPR size: " << getMipsRegisterSize(Flags->gpr_size) << "\n"; 6233 OS << "CPR1 size: " << getMipsRegisterSize(Flags->cpr1_size) << "\n"; 6234 OS << "CPR2 size: " << getMipsRegisterSize(Flags->cpr2_size) << "\n"; 6235 OS << "FP ABI: " << printEnum(Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)) 6236 << "\n"; 6237 OS << "ISA Extension: " 6238 << printEnum(Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)) << "\n"; 6239 if (Flags->ases == 0) 6240 OS << "ASEs: None\n"; 6241 else 6242 // FIXME: Print each flag on a separate line. 6243 OS << "ASEs: " << printFlags(Flags->ases, makeArrayRef(ElfMipsASEFlags)) 6244 << "\n"; 6245 OS << "FLAGS 1: " << format_hex_no_prefix(Flags->flags1, 8, false) << "\n"; 6246 OS << "FLAGS 2: " << format_hex_no_prefix(Flags->flags2, 8, false) << "\n"; 6247 OS << "\n"; 6248 } 6249 6250 template <class ELFT> void LLVMELFDumper<ELFT>::printFileHeaders() { 6251 const Elf_Ehdr &E = this->Obj.getHeader(); 6252 { 6253 DictScope D(W, "ElfHeader"); 6254 { 6255 DictScope D(W, "Ident"); 6256 W.printBinary("Magic", makeArrayRef(E.e_ident).slice(ELF::EI_MAG0, 4)); 6257 W.printEnum("Class", E.e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 6258 W.printEnum("DataEncoding", E.e_ident[ELF::EI_DATA], 6259 makeArrayRef(ElfDataEncoding)); 6260 W.printNumber("FileVersion", E.e_ident[ELF::EI_VERSION]); 6261 6262 auto OSABI = makeArrayRef(ElfOSABI); 6263 if (E.e_ident[ELF::EI_OSABI] >= ELF::ELFOSABI_FIRST_ARCH && 6264 E.e_ident[ELF::EI_OSABI] <= ELF::ELFOSABI_LAST_ARCH) { 6265 switch (E.e_machine) { 6266 case ELF::EM_AMDGPU: 6267 OSABI = makeArrayRef(AMDGPUElfOSABI); 6268 break; 6269 case ELF::EM_ARM: 6270 OSABI = makeArrayRef(ARMElfOSABI); 6271 break; 6272 case ELF::EM_TI_C6000: 6273 OSABI = makeArrayRef(C6000ElfOSABI); 6274 break; 6275 } 6276 } 6277 W.printEnum("OS/ABI", E.e_ident[ELF::EI_OSABI], OSABI); 6278 W.printNumber("ABIVersion", E.e_ident[ELF::EI_ABIVERSION]); 6279 W.printBinary("Unused", makeArrayRef(E.e_ident).slice(ELF::EI_PAD)); 6280 } 6281 6282 std::string TypeStr; 6283 if (const EnumEntry<unsigned> *Ent = getObjectFileEnumEntry(E.e_type)) { 6284 TypeStr = Ent->Name.str(); 6285 } else { 6286 if (E.e_type >= ET_LOPROC) 6287 TypeStr = "Processor Specific"; 6288 else if (E.e_type >= ET_LOOS) 6289 TypeStr = "OS Specific"; 6290 else 6291 TypeStr = "Unknown"; 6292 } 6293 W.printString("Type", TypeStr + " (0x" + to_hexString(E.e_type) + ")"); 6294 6295 W.printEnum("Machine", E.e_machine, makeArrayRef(ElfMachineType)); 6296 W.printNumber("Version", E.e_version); 6297 W.printHex("Entry", E.e_entry); 6298 W.printHex("ProgramHeaderOffset", E.e_phoff); 6299 W.printHex("SectionHeaderOffset", E.e_shoff); 6300 if (E.e_machine == EM_MIPS) 6301 W.printFlags("Flags", E.e_flags, makeArrayRef(ElfHeaderMipsFlags), 6302 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 6303 unsigned(ELF::EF_MIPS_MACH)); 6304 else if (E.e_machine == EM_AMDGPU) { 6305 switch (E.e_ident[ELF::EI_ABIVERSION]) { 6306 default: 6307 W.printHex("Flags", E.e_flags); 6308 break; 6309 case 0: 6310 // ELFOSABI_AMDGPU_PAL, ELFOSABI_AMDGPU_MESA3D support *_V3 flags. 6311 LLVM_FALLTHROUGH; 6312 case ELF::ELFABIVERSION_AMDGPU_HSA_V3: 6313 W.printFlags("Flags", E.e_flags, 6314 makeArrayRef(ElfHeaderAMDGPUFlagsABIVersion3), 6315 unsigned(ELF::EF_AMDGPU_MACH)); 6316 break; 6317 case ELF::ELFABIVERSION_AMDGPU_HSA_V4: 6318 W.printFlags("Flags", E.e_flags, 6319 makeArrayRef(ElfHeaderAMDGPUFlagsABIVersion4), 6320 unsigned(ELF::EF_AMDGPU_MACH), 6321 unsigned(ELF::EF_AMDGPU_FEATURE_XNACK_V4), 6322 unsigned(ELF::EF_AMDGPU_FEATURE_SRAMECC_V4)); 6323 break; 6324 } 6325 } else if (E.e_machine == EM_RISCV) 6326 W.printFlags("Flags", E.e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 6327 else if (E.e_machine == EM_AVR) 6328 W.printFlags("Flags", E.e_flags, makeArrayRef(ElfHeaderAVRFlags), 6329 unsigned(ELF::EF_AVR_ARCH_MASK)); 6330 else 6331 W.printFlags("Flags", E.e_flags); 6332 W.printNumber("HeaderSize", E.e_ehsize); 6333 W.printNumber("ProgramHeaderEntrySize", E.e_phentsize); 6334 W.printNumber("ProgramHeaderCount", E.e_phnum); 6335 W.printNumber("SectionHeaderEntrySize", E.e_shentsize); 6336 W.printString("SectionHeaderCount", 6337 getSectionHeadersNumString(this->Obj, this->FileName)); 6338 W.printString("StringTableSectionIndex", 6339 getSectionHeaderTableIndexString(this->Obj, this->FileName)); 6340 } 6341 } 6342 6343 template <class ELFT> void LLVMELFDumper<ELFT>::printGroupSections() { 6344 DictScope Lists(W, "Groups"); 6345 std::vector<GroupSection> V = this->getGroups(); 6346 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 6347 for (const GroupSection &G : V) { 6348 DictScope D(W, "Group"); 6349 W.printNumber("Name", G.Name, G.ShName); 6350 W.printNumber("Index", G.Index); 6351 W.printNumber("Link", G.Link); 6352 W.printNumber("Info", G.Info); 6353 W.printHex("Type", getGroupType(G.Type), G.Type); 6354 W.startLine() << "Signature: " << G.Signature << "\n"; 6355 6356 ListScope L(W, "Section(s) in group"); 6357 for (const GroupMember &GM : G.Members) { 6358 const GroupSection *MainGroup = Map[GM.Index]; 6359 if (MainGroup != &G) 6360 this->reportUniqueWarning( 6361 "section with index " + Twine(GM.Index) + 6362 ", included in the group section with index " + 6363 Twine(MainGroup->Index) + 6364 ", was also found in the group section with index " + 6365 Twine(G.Index)); 6366 W.startLine() << GM.Name << " (" << GM.Index << ")\n"; 6367 } 6368 } 6369 6370 if (V.empty()) 6371 W.startLine() << "There are no group sections in the file.\n"; 6372 } 6373 6374 template <class ELFT> void LLVMELFDumper<ELFT>::printRelocations() { 6375 ListScope D(W, "Relocations"); 6376 6377 for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) { 6378 if (!isRelocationSec<ELFT>(Sec)) 6379 continue; 6380 6381 StringRef Name = this->getPrintableSectionName(Sec); 6382 unsigned SecNdx = &Sec - &cantFail(this->Obj.sections()).front(); 6383 W.startLine() << "Section (" << SecNdx << ") " << Name << " {\n"; 6384 W.indent(); 6385 this->printRelocationsHelper(Sec); 6386 W.unindent(); 6387 W.startLine() << "}\n"; 6388 } 6389 } 6390 6391 template <class ELFT> 6392 void LLVMELFDumper<ELFT>::printRelrReloc(const Elf_Relr &R) { 6393 W.startLine() << W.hex(R) << "\n"; 6394 } 6395 6396 template <class ELFT> 6397 void LLVMELFDumper<ELFT>::printRelRelaReloc(const Relocation<ELFT> &R, 6398 const RelSymbol<ELFT> &RelSym) { 6399 StringRef SymbolName = RelSym.Name; 6400 SmallString<32> RelocName; 6401 this->Obj.getRelocationTypeName(R.Type, RelocName); 6402 6403 if (opts::ExpandRelocs) { 6404 DictScope Group(W, "Relocation"); 6405 W.printHex("Offset", R.Offset); 6406 W.printNumber("Type", RelocName, R.Type); 6407 W.printNumber("Symbol", !SymbolName.empty() ? SymbolName : "-", R.Symbol); 6408 if (R.Addend) 6409 W.printHex("Addend", (uintX_t)*R.Addend); 6410 } else { 6411 raw_ostream &OS = W.startLine(); 6412 OS << W.hex(R.Offset) << " " << RelocName << " " 6413 << (!SymbolName.empty() ? SymbolName : "-"); 6414 if (R.Addend) 6415 OS << " " << W.hex((uintX_t)*R.Addend); 6416 OS << "\n"; 6417 } 6418 } 6419 6420 template <class ELFT> void LLVMELFDumper<ELFT>::printSectionHeaders() { 6421 ListScope SectionsD(W, "Sections"); 6422 6423 int SectionIndex = -1; 6424 std::vector<EnumEntry<unsigned>> FlagsList = 6425 getSectionFlagsForTarget(this->Obj.getHeader().e_machine); 6426 for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) { 6427 DictScope SectionD(W, "Section"); 6428 W.printNumber("Index", ++SectionIndex); 6429 W.printNumber("Name", this->getPrintableSectionName(Sec), Sec.sh_name); 6430 W.printHex("Type", 6431 object::getELFSectionTypeName(this->Obj.getHeader().e_machine, 6432 Sec.sh_type), 6433 Sec.sh_type); 6434 W.printFlags("Flags", Sec.sh_flags, makeArrayRef(FlagsList)); 6435 W.printHex("Address", Sec.sh_addr); 6436 W.printHex("Offset", Sec.sh_offset); 6437 W.printNumber("Size", Sec.sh_size); 6438 W.printNumber("Link", Sec.sh_link); 6439 W.printNumber("Info", Sec.sh_info); 6440 W.printNumber("AddressAlignment", Sec.sh_addralign); 6441 W.printNumber("EntrySize", Sec.sh_entsize); 6442 6443 if (opts::SectionRelocations) { 6444 ListScope D(W, "Relocations"); 6445 this->printRelocationsHelper(Sec); 6446 } 6447 6448 if (opts::SectionSymbols) { 6449 ListScope D(W, "Symbols"); 6450 if (this->DotSymtabSec) { 6451 StringRef StrTable = unwrapOrError( 6452 this->FileName, 6453 this->Obj.getStringTableForSymtab(*this->DotSymtabSec)); 6454 ArrayRef<Elf_Word> ShndxTable = this->getShndxTable(this->DotSymtabSec); 6455 6456 typename ELFT::SymRange Symbols = unwrapOrError( 6457 this->FileName, this->Obj.symbols(this->DotSymtabSec)); 6458 for (const Elf_Sym &Sym : Symbols) { 6459 const Elf_Shdr *SymSec = unwrapOrError( 6460 this->FileName, 6461 this->Obj.getSection(Sym, this->DotSymtabSec, ShndxTable)); 6462 if (SymSec == &Sec) 6463 printSymbol(Sym, &Sym - &Symbols[0], ShndxTable, StrTable, false, 6464 false); 6465 } 6466 } 6467 } 6468 6469 if (opts::SectionData && Sec.sh_type != ELF::SHT_NOBITS) { 6470 ArrayRef<uint8_t> Data = 6471 unwrapOrError(this->FileName, this->Obj.getSectionContents(Sec)); 6472 W.printBinaryBlock( 6473 "SectionData", 6474 StringRef(reinterpret_cast<const char *>(Data.data()), Data.size())); 6475 } 6476 } 6477 } 6478 6479 template <class ELFT> 6480 void LLVMELFDumper<ELFT>::printSymbolSection( 6481 const Elf_Sym &Symbol, unsigned SymIndex, 6482 DataRegion<Elf_Word> ShndxTable) const { 6483 auto GetSectionSpecialType = [&]() -> Optional<StringRef> { 6484 if (Symbol.isUndefined()) 6485 return StringRef("Undefined"); 6486 if (Symbol.isProcessorSpecific()) 6487 return StringRef("Processor Specific"); 6488 if (Symbol.isOSSpecific()) 6489 return StringRef("Operating System Specific"); 6490 if (Symbol.isAbsolute()) 6491 return StringRef("Absolute"); 6492 if (Symbol.isCommon()) 6493 return StringRef("Common"); 6494 if (Symbol.isReserved() && Symbol.st_shndx != SHN_XINDEX) 6495 return StringRef("Reserved"); 6496 return None; 6497 }; 6498 6499 if (Optional<StringRef> Type = GetSectionSpecialType()) { 6500 W.printHex("Section", *Type, Symbol.st_shndx); 6501 return; 6502 } 6503 6504 Expected<unsigned> SectionIndex = 6505 this->getSymbolSectionIndex(Symbol, SymIndex, ShndxTable); 6506 if (!SectionIndex) { 6507 assert(Symbol.st_shndx == SHN_XINDEX && 6508 "getSymbolSectionIndex should only fail due to an invalid " 6509 "SHT_SYMTAB_SHNDX table/reference"); 6510 this->reportUniqueWarning(SectionIndex.takeError()); 6511 W.printHex("Section", "Reserved", SHN_XINDEX); 6512 return; 6513 } 6514 6515 Expected<StringRef> SectionName = 6516 this->getSymbolSectionName(Symbol, *SectionIndex); 6517 if (!SectionName) { 6518 // Don't report an invalid section name if the section headers are missing. 6519 // In such situations, all sections will be "invalid". 6520 if (!this->ObjF.sections().empty()) 6521 this->reportUniqueWarning(SectionName.takeError()); 6522 else 6523 consumeError(SectionName.takeError()); 6524 W.printHex("Section", "<?>", *SectionIndex); 6525 } else { 6526 W.printHex("Section", *SectionName, *SectionIndex); 6527 } 6528 } 6529 6530 template <class ELFT> 6531 void LLVMELFDumper<ELFT>::printSymbol(const Elf_Sym &Symbol, unsigned SymIndex, 6532 DataRegion<Elf_Word> ShndxTable, 6533 Optional<StringRef> StrTable, 6534 bool IsDynamic, 6535 bool /*NonVisibilityBitsUsed*/) const { 6536 std::string FullSymbolName = this->getFullSymbolName( 6537 Symbol, SymIndex, ShndxTable, StrTable, IsDynamic); 6538 unsigned char SymbolType = Symbol.getType(); 6539 6540 DictScope D(W, "Symbol"); 6541 W.printNumber("Name", FullSymbolName, Symbol.st_name); 6542 W.printHex("Value", Symbol.st_value); 6543 W.printNumber("Size", Symbol.st_size); 6544 W.printEnum("Binding", Symbol.getBinding(), makeArrayRef(ElfSymbolBindings)); 6545 if (this->Obj.getHeader().e_machine == ELF::EM_AMDGPU && 6546 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 6547 W.printEnum("Type", SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 6548 else 6549 W.printEnum("Type", SymbolType, makeArrayRef(ElfSymbolTypes)); 6550 if (Symbol.st_other == 0) 6551 // Usually st_other flag is zero. Do not pollute the output 6552 // by flags enumeration in that case. 6553 W.printNumber("Other", 0); 6554 else { 6555 std::vector<EnumEntry<unsigned>> SymOtherFlags(std::begin(ElfSymOtherFlags), 6556 std::end(ElfSymOtherFlags)); 6557 if (this->Obj.getHeader().e_machine == EM_MIPS) { 6558 // Someones in their infinite wisdom decided to make STO_MIPS_MIPS16 6559 // flag overlapped with other ST_MIPS_xxx flags. So consider both 6560 // cases separately. 6561 if ((Symbol.st_other & STO_MIPS_MIPS16) == STO_MIPS_MIPS16) 6562 SymOtherFlags.insert(SymOtherFlags.end(), 6563 std::begin(ElfMips16SymOtherFlags), 6564 std::end(ElfMips16SymOtherFlags)); 6565 else 6566 SymOtherFlags.insert(SymOtherFlags.end(), 6567 std::begin(ElfMipsSymOtherFlags), 6568 std::end(ElfMipsSymOtherFlags)); 6569 } else if (this->Obj.getHeader().e_machine == EM_AARCH64) { 6570 SymOtherFlags.insert(SymOtherFlags.end(), 6571 std::begin(ElfAArch64SymOtherFlags), 6572 std::end(ElfAArch64SymOtherFlags)); 6573 } 6574 W.printFlags("Other", Symbol.st_other, makeArrayRef(SymOtherFlags), 0x3u); 6575 } 6576 printSymbolSection(Symbol, SymIndex, ShndxTable); 6577 } 6578 6579 template <class ELFT> 6580 void LLVMELFDumper<ELFT>::printSymbols(bool PrintSymbols, 6581 bool PrintDynamicSymbols) { 6582 if (PrintSymbols) { 6583 ListScope Group(W, "Symbols"); 6584 this->printSymbolsHelper(false); 6585 } 6586 if (PrintDynamicSymbols) { 6587 ListScope Group(W, "DynamicSymbols"); 6588 this->printSymbolsHelper(true); 6589 } 6590 } 6591 6592 template <class ELFT> void LLVMELFDumper<ELFT>::printDynamicTable() { 6593 Elf_Dyn_Range Table = this->dynamic_table(); 6594 if (Table.empty()) 6595 return; 6596 6597 W.startLine() << "DynamicSection [ (" << Table.size() << " entries)\n"; 6598 6599 size_t MaxTagSize = getMaxDynamicTagSize(this->Obj, Table); 6600 // The "Name/Value" column should be indented from the "Type" column by N 6601 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 6602 // space (1) = -3. 6603 W.startLine() << " Tag" << std::string(ELFT::Is64Bits ? 16 : 8, ' ') 6604 << "Type" << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 6605 6606 std::string ValueFmt = "%-" + std::to_string(MaxTagSize) + "s "; 6607 for (auto Entry : Table) { 6608 uintX_t Tag = Entry.getTag(); 6609 std::string Value = this->getDynamicEntry(Tag, Entry.getVal()); 6610 W.startLine() << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10, true) 6611 << " " 6612 << format(ValueFmt.c_str(), 6613 this->Obj.getDynamicTagAsString(Tag).c_str()) 6614 << Value << "\n"; 6615 } 6616 W.startLine() << "]\n"; 6617 } 6618 6619 template <class ELFT> void LLVMELFDumper<ELFT>::printDynamicRelocations() { 6620 W.startLine() << "Dynamic Relocations {\n"; 6621 W.indent(); 6622 this->printDynamicRelocationsHelper(); 6623 W.unindent(); 6624 W.startLine() << "}\n"; 6625 } 6626 6627 template <class ELFT> 6628 void LLVMELFDumper<ELFT>::printProgramHeaders( 6629 bool PrintProgramHeaders, cl::boolOrDefault PrintSectionMapping) { 6630 if (PrintProgramHeaders) 6631 printProgramHeaders(); 6632 if (PrintSectionMapping == cl::BOU_TRUE) 6633 printSectionMapping(); 6634 } 6635 6636 template <class ELFT> void LLVMELFDumper<ELFT>::printProgramHeaders() { 6637 ListScope L(W, "ProgramHeaders"); 6638 6639 Expected<ArrayRef<Elf_Phdr>> PhdrsOrErr = this->Obj.program_headers(); 6640 if (!PhdrsOrErr) { 6641 this->reportUniqueWarning("unable to dump program headers: " + 6642 toString(PhdrsOrErr.takeError())); 6643 return; 6644 } 6645 6646 for (const Elf_Phdr &Phdr : *PhdrsOrErr) { 6647 DictScope P(W, "ProgramHeader"); 6648 StringRef Type = 6649 segmentTypeToString(this->Obj.getHeader().e_machine, Phdr.p_type); 6650 6651 W.printHex("Type", Type.empty() ? "Unknown" : Type, Phdr.p_type); 6652 W.printHex("Offset", Phdr.p_offset); 6653 W.printHex("VirtualAddress", Phdr.p_vaddr); 6654 W.printHex("PhysicalAddress", Phdr.p_paddr); 6655 W.printNumber("FileSize", Phdr.p_filesz); 6656 W.printNumber("MemSize", Phdr.p_memsz); 6657 W.printFlags("Flags", Phdr.p_flags, makeArrayRef(ElfSegmentFlags)); 6658 W.printNumber("Alignment", Phdr.p_align); 6659 } 6660 } 6661 6662 template <class ELFT> 6663 void LLVMELFDumper<ELFT>::printVersionSymbolSection(const Elf_Shdr *Sec) { 6664 ListScope SS(W, "VersionSymbols"); 6665 if (!Sec) 6666 return; 6667 6668 StringRef StrTable; 6669 ArrayRef<Elf_Sym> Syms; 6670 const Elf_Shdr *SymTabSec; 6671 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 6672 this->getVersionTable(*Sec, &Syms, &StrTable, &SymTabSec); 6673 if (!VerTableOrErr) { 6674 this->reportUniqueWarning(VerTableOrErr.takeError()); 6675 return; 6676 } 6677 6678 if (StrTable.empty() || Syms.empty() || Syms.size() != VerTableOrErr->size()) 6679 return; 6680 6681 ArrayRef<Elf_Word> ShNdxTable = this->getShndxTable(SymTabSec); 6682 for (size_t I = 0, E = Syms.size(); I < E; ++I) { 6683 DictScope S(W, "Symbol"); 6684 W.printNumber("Version", (*VerTableOrErr)[I].vs_index & VERSYM_VERSION); 6685 W.printString("Name", 6686 this->getFullSymbolName(Syms[I], I, ShNdxTable, StrTable, 6687 /*IsDynamic=*/true)); 6688 } 6689 } 6690 6691 static const EnumEntry<unsigned> SymVersionFlags[] = { 6692 {"Base", "BASE", VER_FLG_BASE}, 6693 {"Weak", "WEAK", VER_FLG_WEAK}, 6694 {"Info", "INFO", VER_FLG_INFO}}; 6695 6696 template <class ELFT> 6697 void LLVMELFDumper<ELFT>::printVersionDefinitionSection(const Elf_Shdr *Sec) { 6698 ListScope SD(W, "VersionDefinitions"); 6699 if (!Sec) 6700 return; 6701 6702 Expected<std::vector<VerDef>> V = this->Obj.getVersionDefinitions(*Sec); 6703 if (!V) { 6704 this->reportUniqueWarning(V.takeError()); 6705 return; 6706 } 6707 6708 for (const VerDef &D : *V) { 6709 DictScope Def(W, "Definition"); 6710 W.printNumber("Version", D.Version); 6711 W.printFlags("Flags", D.Flags, makeArrayRef(SymVersionFlags)); 6712 W.printNumber("Index", D.Ndx); 6713 W.printNumber("Hash", D.Hash); 6714 W.printString("Name", D.Name.c_str()); 6715 W.printList( 6716 "Predecessors", D.AuxV, 6717 [](raw_ostream &OS, const VerdAux &Aux) { OS << Aux.Name.c_str(); }); 6718 } 6719 } 6720 6721 template <class ELFT> 6722 void LLVMELFDumper<ELFT>::printVersionDependencySection(const Elf_Shdr *Sec) { 6723 ListScope SD(W, "VersionRequirements"); 6724 if (!Sec) 6725 return; 6726 6727 Expected<std::vector<VerNeed>> V = 6728 this->Obj.getVersionDependencies(*Sec, this->WarningHandler); 6729 if (!V) { 6730 this->reportUniqueWarning(V.takeError()); 6731 return; 6732 } 6733 6734 for (const VerNeed &VN : *V) { 6735 DictScope Entry(W, "Dependency"); 6736 W.printNumber("Version", VN.Version); 6737 W.printNumber("Count", VN.Cnt); 6738 W.printString("FileName", VN.File.c_str()); 6739 6740 ListScope L(W, "Entries"); 6741 for (const VernAux &Aux : VN.AuxV) { 6742 DictScope Entry(W, "Entry"); 6743 W.printNumber("Hash", Aux.Hash); 6744 W.printFlags("Flags", Aux.Flags, makeArrayRef(SymVersionFlags)); 6745 W.printNumber("Index", Aux.Other); 6746 W.printString("Name", Aux.Name.c_str()); 6747 } 6748 } 6749 } 6750 6751 template <class ELFT> void LLVMELFDumper<ELFT>::printHashHistograms() { 6752 W.startLine() << "Hash Histogram not implemented!\n"; 6753 } 6754 6755 // Returns true if rel/rela section exists, and populates SymbolIndices. 6756 // Otherwise returns false. 6757 template <class ELFT> 6758 static bool getSymbolIndices(const typename ELFT::Shdr *CGRelSection, 6759 const ELFFile<ELFT> &Obj, 6760 const LLVMELFDumper<ELFT> *Dumper, 6761 SmallVector<uint32_t, 128> &SymbolIndices) { 6762 if (!CGRelSection) { 6763 Dumper->reportUniqueWarning( 6764 "relocation section for a call graph section doesn't exist"); 6765 return false; 6766 } 6767 6768 if (CGRelSection->sh_type == SHT_REL) { 6769 typename ELFT::RelRange CGProfileRel; 6770 Expected<typename ELFT::RelRange> CGProfileRelOrError = 6771 Obj.rels(*CGRelSection); 6772 if (!CGProfileRelOrError) { 6773 Dumper->reportUniqueWarning("unable to load relocations for " 6774 "SHT_LLVM_CALL_GRAPH_PROFILE section: " + 6775 toString(CGProfileRelOrError.takeError())); 6776 return false; 6777 } 6778 6779 CGProfileRel = *CGProfileRelOrError; 6780 for (const typename ELFT::Rel &Rel : CGProfileRel) 6781 SymbolIndices.push_back(Rel.getSymbol(Obj.isMips64EL())); 6782 } else { 6783 // MC unconditionally produces SHT_REL, but GNU strip/objcopy may convert 6784 // the format to SHT_RELA 6785 // (https://sourceware.org/bugzilla/show_bug.cgi?id=28035) 6786 typename ELFT::RelaRange CGProfileRela; 6787 Expected<typename ELFT::RelaRange> CGProfileRelaOrError = 6788 Obj.relas(*CGRelSection); 6789 if (!CGProfileRelaOrError) { 6790 Dumper->reportUniqueWarning("unable to load relocations for " 6791 "SHT_LLVM_CALL_GRAPH_PROFILE section: " + 6792 toString(CGProfileRelaOrError.takeError())); 6793 return false; 6794 } 6795 6796 CGProfileRela = *CGProfileRelaOrError; 6797 for (const typename ELFT::Rela &Rela : CGProfileRela) 6798 SymbolIndices.push_back(Rela.getSymbol(Obj.isMips64EL())); 6799 } 6800 6801 return true; 6802 } 6803 6804 template <class ELFT> void LLVMELFDumper<ELFT>::printCGProfile() { 6805 llvm::MapVector<const Elf_Shdr *, const Elf_Shdr *> SecToRelocMap; 6806 6807 auto IsMatch = [](const Elf_Shdr &Sec) -> bool { 6808 return Sec.sh_type == ELF::SHT_LLVM_CALL_GRAPH_PROFILE; 6809 }; 6810 this->getSectionAndRelocations(IsMatch, SecToRelocMap); 6811 6812 for (const auto &CGMapEntry : SecToRelocMap) { 6813 const Elf_Shdr *CGSection = CGMapEntry.first; 6814 const Elf_Shdr *CGRelSection = CGMapEntry.second; 6815 6816 Expected<ArrayRef<Elf_CGProfile>> CGProfileOrErr = 6817 this->Obj.template getSectionContentsAsArray<Elf_CGProfile>(*CGSection); 6818 if (!CGProfileOrErr) { 6819 this->reportUniqueWarning( 6820 "unable to load the SHT_LLVM_CALL_GRAPH_PROFILE section: " + 6821 toString(CGProfileOrErr.takeError())); 6822 return; 6823 } 6824 6825 SmallVector<uint32_t, 128> SymbolIndices; 6826 bool UseReloc = 6827 getSymbolIndices<ELFT>(CGRelSection, this->Obj, this, SymbolIndices); 6828 if (UseReloc && SymbolIndices.size() != CGProfileOrErr->size() * 2) { 6829 this->reportUniqueWarning( 6830 "number of from/to pairs does not match number of frequencies"); 6831 UseReloc = false; 6832 } 6833 6834 ListScope L(W, "CGProfile"); 6835 for (uint32_t I = 0, Size = CGProfileOrErr->size(); I != Size; ++I) { 6836 const Elf_CGProfile &CGPE = (*CGProfileOrErr)[I]; 6837 DictScope D(W, "CGProfileEntry"); 6838 if (UseReloc) { 6839 uint32_t From = SymbolIndices[I * 2]; 6840 uint32_t To = SymbolIndices[I * 2 + 1]; 6841 W.printNumber("From", this->getStaticSymbolName(From), From); 6842 W.printNumber("To", this->getStaticSymbolName(To), To); 6843 } 6844 W.printNumber("Weight", CGPE.cgp_weight); 6845 } 6846 } 6847 } 6848 6849 template <class ELFT> void LLVMELFDumper<ELFT>::printBBAddrMaps() { 6850 bool IsRelocatable = this->Obj.getHeader().e_type == ELF::ET_REL; 6851 for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) { 6852 if (Sec.sh_type != SHT_LLVM_BB_ADDR_MAP) 6853 continue; 6854 Optional<const Elf_Shdr *> FunctionSec = None; 6855 if (IsRelocatable) 6856 FunctionSec = 6857 unwrapOrError(this->FileName, this->Obj.getSection(Sec.sh_link)); 6858 ListScope L(W, "BBAddrMap"); 6859 Expected<std::vector<Elf_BBAddrMap>> BBAddrMapOrErr = 6860 this->Obj.decodeBBAddrMap(Sec); 6861 if (!BBAddrMapOrErr) { 6862 this->reportUniqueWarning("unable to dump " + this->describe(Sec) + ": " + 6863 toString(BBAddrMapOrErr.takeError())); 6864 continue; 6865 } 6866 for (const Elf_BBAddrMap &AM : *BBAddrMapOrErr) { 6867 DictScope D(W, "Function"); 6868 W.printHex("At", AM.Addr); 6869 SmallVector<uint32_t> FuncSymIndex = 6870 this->getSymbolIndexesForFunctionAddress(AM.Addr, FunctionSec); 6871 std::string FuncName = "<?>"; 6872 if (FuncSymIndex.empty()) 6873 this->reportUniqueWarning( 6874 "could not identify function symbol for address (0x" + 6875 Twine::utohexstr(AM.Addr) + ") in " + this->describe(Sec)); 6876 else 6877 FuncName = this->getStaticSymbolName(FuncSymIndex.front()); 6878 W.printString("Name", FuncName); 6879 6880 ListScope L(W, "BB entries"); 6881 for (const typename Elf_BBAddrMap::BBEntry &BBE : AM.BBEntries) { 6882 DictScope L(W); 6883 W.printHex("Offset", BBE.Offset); 6884 W.printHex("Size", BBE.Size); 6885 W.printBoolean("HasReturn", BBE.HasReturn); 6886 W.printBoolean("HasTailCall", BBE.HasTailCall); 6887 W.printBoolean("IsEHPad", BBE.IsEHPad); 6888 W.printBoolean("CanFallThrough", BBE.CanFallThrough); 6889 } 6890 } 6891 } 6892 } 6893 6894 template <class ELFT> void LLVMELFDumper<ELFT>::printAddrsig() { 6895 ListScope L(W, "Addrsig"); 6896 if (!this->DotAddrsigSec) 6897 return; 6898 6899 Expected<std::vector<uint64_t>> SymsOrErr = 6900 decodeAddrsigSection(this->Obj, *this->DotAddrsigSec); 6901 if (!SymsOrErr) { 6902 this->reportUniqueWarning(SymsOrErr.takeError()); 6903 return; 6904 } 6905 6906 for (uint64_t Sym : *SymsOrErr) 6907 W.printNumber("Sym", this->getStaticSymbolName(Sym), Sym); 6908 } 6909 6910 template <typename ELFT> 6911 static bool printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc, 6912 ScopedPrinter &W) { 6913 // Return true if we were able to pretty-print the note, false otherwise. 6914 switch (NoteType) { 6915 default: 6916 return false; 6917 case ELF::NT_GNU_ABI_TAG: { 6918 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 6919 if (!AbiTag.IsValid) { 6920 W.printString("ABI", "<corrupt GNU_ABI_TAG>"); 6921 return false; 6922 } else { 6923 W.printString("OS", AbiTag.OSName); 6924 W.printString("ABI", AbiTag.ABI); 6925 } 6926 break; 6927 } 6928 case ELF::NT_GNU_BUILD_ID: { 6929 W.printString("Build ID", getGNUBuildId(Desc)); 6930 break; 6931 } 6932 case ELF::NT_GNU_GOLD_VERSION: 6933 W.printString("Version", getDescAsStringRef(Desc)); 6934 break; 6935 case ELF::NT_GNU_PROPERTY_TYPE_0: 6936 ListScope D(W, "Property"); 6937 for (const std::string &Property : getGNUPropertyList<ELFT>(Desc)) 6938 W.printString(Property); 6939 break; 6940 } 6941 return true; 6942 } 6943 6944 template <typename ELFT> 6945 static bool printLLVMOMPOFFLOADNoteLLVMStyle(uint32_t NoteType, 6946 ArrayRef<uint8_t> Desc, 6947 ScopedPrinter &W) { 6948 switch (NoteType) { 6949 default: 6950 return false; 6951 case ELF::NT_LLVM_OPENMP_OFFLOAD_VERSION: 6952 W.printString("Version", getDescAsStringRef(Desc)); 6953 break; 6954 case ELF::NT_LLVM_OPENMP_OFFLOAD_PRODUCER: 6955 W.printString("Producer", getDescAsStringRef(Desc)); 6956 break; 6957 case ELF::NT_LLVM_OPENMP_OFFLOAD_PRODUCER_VERSION: 6958 W.printString("Producer version", getDescAsStringRef(Desc)); 6959 break; 6960 } 6961 return true; 6962 } 6963 6964 static void printCoreNoteLLVMStyle(const CoreNote &Note, ScopedPrinter &W) { 6965 W.printNumber("Page Size", Note.PageSize); 6966 for (const CoreFileMapping &Mapping : Note.Mappings) { 6967 ListScope D(W, "Mapping"); 6968 W.printHex("Start", Mapping.Start); 6969 W.printHex("End", Mapping.End); 6970 W.printHex("Offset", Mapping.Offset); 6971 W.printString("Filename", Mapping.Filename); 6972 } 6973 } 6974 6975 template <class ELFT> void LLVMELFDumper<ELFT>::printNotes() { 6976 ListScope L(W, "Notes"); 6977 6978 std::unique_ptr<DictScope> NoteScope; 6979 auto StartNotes = [&](Optional<StringRef> SecName, 6980 const typename ELFT::Off Offset, 6981 const typename ELFT::Addr Size) { 6982 NoteScope = std::make_unique<DictScope>(W, "NoteSection"); 6983 W.printString("Name", SecName ? *SecName : "<?>"); 6984 W.printHex("Offset", Offset); 6985 W.printHex("Size", Size); 6986 }; 6987 6988 auto EndNotes = [&] { NoteScope.reset(); }; 6989 6990 auto ProcessNote = [&](const Elf_Note &Note, bool IsCore) -> Error { 6991 DictScope D2(W, "Note"); 6992 StringRef Name = Note.getName(); 6993 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 6994 Elf_Word Type = Note.getType(); 6995 6996 // Print the note owner/type. 6997 W.printString("Owner", Name); 6998 W.printHex("Data size", Descriptor.size()); 6999 7000 StringRef NoteType = 7001 getNoteTypeName<ELFT>(Note, this->Obj.getHeader().e_type); 7002 if (!NoteType.empty()) 7003 W.printString("Type", NoteType); 7004 else 7005 W.printString("Type", 7006 "Unknown (" + to_string(format_hex(Type, 10)) + ")"); 7007 7008 // Print the description, or fallback to printing raw bytes for unknown 7009 // owners/if we fail to pretty-print the contents. 7010 if (Name == "GNU") { 7011 if (printGNUNoteLLVMStyle<ELFT>(Type, Descriptor, W)) 7012 return Error::success(); 7013 } else if (Name == "FreeBSD") { 7014 if (Optional<FreeBSDNote> N = 7015 getFreeBSDNote<ELFT>(Type, Descriptor, IsCore)) { 7016 W.printString(N->Type, N->Value); 7017 return Error::success(); 7018 } 7019 } else if (Name == "AMD") { 7020 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 7021 if (!N.Type.empty()) { 7022 W.printString(N.Type, N.Value); 7023 return Error::success(); 7024 } 7025 } else if (Name == "AMDGPU") { 7026 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 7027 if (!N.Type.empty()) { 7028 W.printString(N.Type, N.Value); 7029 return Error::success(); 7030 } 7031 } else if (Name == "LLVMOMPOFFLOAD") { 7032 if (printLLVMOMPOFFLOADNoteLLVMStyle<ELFT>(Type, Descriptor, W)) 7033 return Error::success(); 7034 } else if (Name == "CORE") { 7035 if (Type == ELF::NT_FILE) { 7036 DataExtractor DescExtractor(Descriptor, 7037 ELFT::TargetEndianness == support::little, 7038 sizeof(Elf_Addr)); 7039 if (Expected<CoreNote> N = readCoreNote(DescExtractor)) { 7040 printCoreNoteLLVMStyle(*N, W); 7041 return Error::success(); 7042 } else { 7043 return N.takeError(); 7044 } 7045 } 7046 } 7047 if (!Descriptor.empty()) { 7048 W.printBinaryBlock("Description data", Descriptor); 7049 } 7050 return Error::success(); 7051 }; 7052 7053 printNotesHelper(*this, StartNotes, ProcessNote, EndNotes); 7054 } 7055 7056 template <class ELFT> void LLVMELFDumper<ELFT>::printELFLinkerOptions() { 7057 ListScope L(W, "LinkerOptions"); 7058 7059 unsigned I = -1; 7060 for (const Elf_Shdr &Shdr : cantFail(this->Obj.sections())) { 7061 ++I; 7062 if (Shdr.sh_type != ELF::SHT_LLVM_LINKER_OPTIONS) 7063 continue; 7064 7065 Expected<ArrayRef<uint8_t>> ContentsOrErr = 7066 this->Obj.getSectionContents(Shdr); 7067 if (!ContentsOrErr) { 7068 this->reportUniqueWarning("unable to read the content of the " 7069 "SHT_LLVM_LINKER_OPTIONS section: " + 7070 toString(ContentsOrErr.takeError())); 7071 continue; 7072 } 7073 if (ContentsOrErr->empty()) 7074 continue; 7075 7076 if (ContentsOrErr->back() != 0) { 7077 this->reportUniqueWarning("SHT_LLVM_LINKER_OPTIONS section at index " + 7078 Twine(I) + 7079 " is broken: the " 7080 "content is not null-terminated"); 7081 continue; 7082 } 7083 7084 SmallVector<StringRef, 16> Strings; 7085 toStringRef(ContentsOrErr->drop_back()).split(Strings, '\0'); 7086 if (Strings.size() % 2 != 0) { 7087 this->reportUniqueWarning( 7088 "SHT_LLVM_LINKER_OPTIONS section at index " + Twine(I) + 7089 " is broken: an incomplete " 7090 "key-value pair was found. The last possible key was: \"" + 7091 Strings.back() + "\""); 7092 continue; 7093 } 7094 7095 for (size_t I = 0; I < Strings.size(); I += 2) 7096 W.printString(Strings[I], Strings[I + 1]); 7097 } 7098 } 7099 7100 template <class ELFT> void LLVMELFDumper<ELFT>::printDependentLibs() { 7101 ListScope L(W, "DependentLibs"); 7102 this->printDependentLibsHelper( 7103 [](const Elf_Shdr &) {}, 7104 [this](StringRef Lib, uint64_t) { W.printString(Lib); }); 7105 } 7106 7107 template <class ELFT> void LLVMELFDumper<ELFT>::printStackSizes() { 7108 ListScope L(W, "StackSizes"); 7109 if (this->Obj.getHeader().e_type == ELF::ET_REL) 7110 this->printRelocatableStackSizes([]() {}); 7111 else 7112 this->printNonRelocatableStackSizes([]() {}); 7113 } 7114 7115 template <class ELFT> 7116 void LLVMELFDumper<ELFT>::printStackSizeEntry(uint64_t Size, 7117 ArrayRef<std::string> FuncNames) { 7118 DictScope D(W, "Entry"); 7119 W.printList("Functions", FuncNames); 7120 W.printHex("Size", Size); 7121 } 7122 7123 template <class ELFT> 7124 void LLVMELFDumper<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 7125 auto PrintEntry = [&](const Elf_Addr *E) { 7126 W.printHex("Address", Parser.getGotAddress(E)); 7127 W.printNumber("Access", Parser.getGotOffset(E)); 7128 W.printHex("Initial", *E); 7129 }; 7130 7131 DictScope GS(W, Parser.IsStatic ? "Static GOT" : "Primary GOT"); 7132 7133 W.printHex("Canonical gp value", Parser.getGp()); 7134 { 7135 ListScope RS(W, "Reserved entries"); 7136 { 7137 DictScope D(W, "Entry"); 7138 PrintEntry(Parser.getGotLazyResolver()); 7139 W.printString("Purpose", StringRef("Lazy resolver")); 7140 } 7141 7142 if (Parser.getGotModulePointer()) { 7143 DictScope D(W, "Entry"); 7144 PrintEntry(Parser.getGotModulePointer()); 7145 W.printString("Purpose", StringRef("Module pointer (GNU extension)")); 7146 } 7147 } 7148 { 7149 ListScope LS(W, "Local entries"); 7150 for (auto &E : Parser.getLocalEntries()) { 7151 DictScope D(W, "Entry"); 7152 PrintEntry(&E); 7153 } 7154 } 7155 7156 if (Parser.IsStatic) 7157 return; 7158 7159 { 7160 ListScope GS(W, "Global entries"); 7161 for (auto &E : Parser.getGlobalEntries()) { 7162 DictScope D(W, "Entry"); 7163 7164 PrintEntry(&E); 7165 7166 const Elf_Sym &Sym = *Parser.getGotSym(&E); 7167 W.printHex("Value", Sym.st_value); 7168 W.printEnum("Type", Sym.getType(), makeArrayRef(ElfSymbolTypes)); 7169 7170 const unsigned SymIndex = &Sym - this->dynamic_symbols().begin(); 7171 DataRegion<Elf_Word> ShndxTable( 7172 (const Elf_Word *)this->DynSymTabShndxRegion.Addr, this->Obj.end()); 7173 printSymbolSection(Sym, SymIndex, ShndxTable); 7174 7175 std::string SymName = this->getFullSymbolName( 7176 Sym, SymIndex, ShndxTable, this->DynamicStringTable, true); 7177 W.printNumber("Name", SymName, Sym.st_name); 7178 } 7179 } 7180 7181 W.printNumber("Number of TLS and multi-GOT entries", 7182 uint64_t(Parser.getOtherEntries().size())); 7183 } 7184 7185 template <class ELFT> 7186 void LLVMELFDumper<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 7187 auto PrintEntry = [&](const Elf_Addr *E) { 7188 W.printHex("Address", Parser.getPltAddress(E)); 7189 W.printHex("Initial", *E); 7190 }; 7191 7192 DictScope GS(W, "PLT GOT"); 7193 7194 { 7195 ListScope RS(W, "Reserved entries"); 7196 { 7197 DictScope D(W, "Entry"); 7198 PrintEntry(Parser.getPltLazyResolver()); 7199 W.printString("Purpose", StringRef("PLT lazy resolver")); 7200 } 7201 7202 if (auto E = Parser.getPltModulePointer()) { 7203 DictScope D(W, "Entry"); 7204 PrintEntry(E); 7205 W.printString("Purpose", StringRef("Module pointer")); 7206 } 7207 } 7208 { 7209 ListScope LS(W, "Entries"); 7210 DataRegion<Elf_Word> ShndxTable( 7211 (const Elf_Word *)this->DynSymTabShndxRegion.Addr, this->Obj.end()); 7212 for (auto &E : Parser.getPltEntries()) { 7213 DictScope D(W, "Entry"); 7214 PrintEntry(&E); 7215 7216 const Elf_Sym &Sym = *Parser.getPltSym(&E); 7217 W.printHex("Value", Sym.st_value); 7218 W.printEnum("Type", Sym.getType(), makeArrayRef(ElfSymbolTypes)); 7219 printSymbolSection(Sym, &Sym - this->dynamic_symbols().begin(), 7220 ShndxTable); 7221 7222 const Elf_Sym *FirstSym = cantFail( 7223 this->Obj.template getEntry<Elf_Sym>(*Parser.getPltSymTable(), 0)); 7224 std::string SymName = this->getFullSymbolName( 7225 Sym, &Sym - FirstSym, ShndxTable, Parser.getPltStrTable(), true); 7226 W.printNumber("Name", SymName, Sym.st_name); 7227 } 7228 } 7229 } 7230 7231 template <class ELFT> void LLVMELFDumper<ELFT>::printMipsABIFlags() { 7232 const Elf_Mips_ABIFlags<ELFT> *Flags; 7233 if (Expected<const Elf_Mips_ABIFlags<ELFT> *> SecOrErr = 7234 getMipsAbiFlagsSection(*this)) { 7235 Flags = *SecOrErr; 7236 if (!Flags) { 7237 W.startLine() << "There is no .MIPS.abiflags section in the file.\n"; 7238 return; 7239 } 7240 } else { 7241 this->reportUniqueWarning(SecOrErr.takeError()); 7242 return; 7243 } 7244 7245 raw_ostream &OS = W.getOStream(); 7246 DictScope GS(W, "MIPS ABI Flags"); 7247 7248 W.printNumber("Version", Flags->version); 7249 W.startLine() << "ISA: "; 7250 if (Flags->isa_rev <= 1) 7251 OS << format("MIPS%u", Flags->isa_level); 7252 else 7253 OS << format("MIPS%ur%u", Flags->isa_level, Flags->isa_rev); 7254 OS << "\n"; 7255 W.printEnum("ISA Extension", Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)); 7256 W.printFlags("ASEs", Flags->ases, makeArrayRef(ElfMipsASEFlags)); 7257 W.printEnum("FP ABI", Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)); 7258 W.printNumber("GPR size", getMipsRegisterSize(Flags->gpr_size)); 7259 W.printNumber("CPR1 size", getMipsRegisterSize(Flags->cpr1_size)); 7260 W.printNumber("CPR2 size", getMipsRegisterSize(Flags->cpr2_size)); 7261 W.printFlags("Flags 1", Flags->flags1, makeArrayRef(ElfMipsFlags1)); 7262 W.printHex("Flags 2", Flags->flags2); 7263 } 7264