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 "Error.h" 17 #include "ObjDumper.h" 18 #include "StackMapPrinter.h" 19 #include "llvm-readobj.h" 20 #include "llvm/ADT/ArrayRef.h" 21 #include "llvm/ADT/DenseMap.h" 22 #include "llvm/ADT/DenseSet.h" 23 #include "llvm/ADT/MapVector.h" 24 #include "llvm/ADT/Optional.h" 25 #include "llvm/ADT/PointerIntPair.h" 26 #include "llvm/ADT/STLExtras.h" 27 #include "llvm/ADT/SmallString.h" 28 #include "llvm/ADT/SmallVector.h" 29 #include "llvm/ADT/StringExtras.h" 30 #include "llvm/ADT/StringRef.h" 31 #include "llvm/ADT/Twine.h" 32 #include "llvm/BinaryFormat/AMDGPUMetadataVerifier.h" 33 #include "llvm/BinaryFormat/ELF.h" 34 #include "llvm/Demangle/Demangle.h" 35 #include "llvm/Object/ELF.h" 36 #include "llvm/Object/ELFObjectFile.h" 37 #include "llvm/Object/ELFTypes.h" 38 #include "llvm/Object/Error.h" 39 #include "llvm/Object/ObjectFile.h" 40 #include "llvm/Object/RelocationResolver.h" 41 #include "llvm/Object/StackMapParser.h" 42 #include "llvm/Support/AMDGPUMetadata.h" 43 #include "llvm/Support/ARMAttributeParser.h" 44 #include "llvm/Support/ARMBuildAttributes.h" 45 #include "llvm/Support/Casting.h" 46 #include "llvm/Support/Compiler.h" 47 #include "llvm/Support/Endian.h" 48 #include "llvm/Support/ErrorHandling.h" 49 #include "llvm/Support/Format.h" 50 #include "llvm/Support/FormatVariadic.h" 51 #include "llvm/Support/FormattedStream.h" 52 #include "llvm/Support/LEB128.h" 53 #include "llvm/Support/MathExtras.h" 54 #include "llvm/Support/MipsABIFlags.h" 55 #include "llvm/Support/RISCVAttributeParser.h" 56 #include "llvm/Support/RISCVAttributes.h" 57 #include "llvm/Support/ScopedPrinter.h" 58 #include "llvm/Support/raw_ostream.h" 59 #include <algorithm> 60 #include <cinttypes> 61 #include <cstddef> 62 #include <cstdint> 63 #include <cstdlib> 64 #include <iterator> 65 #include <memory> 66 #include <string> 67 #include <system_error> 68 #include <unordered_set> 69 #include <vector> 70 71 using namespace llvm; 72 using namespace llvm::object; 73 using namespace ELF; 74 75 #define LLVM_READOBJ_ENUM_CASE(ns, enum) \ 76 case ns::enum: \ 77 return #enum; 78 79 #define ENUM_ENT(enum, altName) \ 80 { #enum, altName, ELF::enum } 81 82 #define ENUM_ENT_1(enum) \ 83 { #enum, #enum, ELF::enum } 84 85 #define LLVM_READOBJ_PHDR_ENUM(ns, enum) \ 86 case ns::enum: \ 87 return std::string(#enum).substr(3); 88 89 #define TYPEDEF_ELF_TYPES(ELFT) \ 90 using ELFO = ELFFile<ELFT>; \ 91 using Elf_Addr = typename ELFT::Addr; \ 92 using Elf_Shdr = typename ELFT::Shdr; \ 93 using Elf_Sym = typename ELFT::Sym; \ 94 using Elf_Dyn = typename ELFT::Dyn; \ 95 using Elf_Dyn_Range = typename ELFT::DynRange; \ 96 using Elf_Rel = typename ELFT::Rel; \ 97 using Elf_Rela = typename ELFT::Rela; \ 98 using Elf_Relr = typename ELFT::Relr; \ 99 using Elf_Rel_Range = typename ELFT::RelRange; \ 100 using Elf_Rela_Range = typename ELFT::RelaRange; \ 101 using Elf_Relr_Range = typename ELFT::RelrRange; \ 102 using Elf_Phdr = typename ELFT::Phdr; \ 103 using Elf_Half = typename ELFT::Half; \ 104 using Elf_Ehdr = typename ELFT::Ehdr; \ 105 using Elf_Word = typename ELFT::Word; \ 106 using Elf_Hash = typename ELFT::Hash; \ 107 using Elf_GnuHash = typename ELFT::GnuHash; \ 108 using Elf_Note = typename ELFT::Note; \ 109 using Elf_Sym_Range = typename ELFT::SymRange; \ 110 using Elf_Versym = typename ELFT::Versym; \ 111 using Elf_Verneed = typename ELFT::Verneed; \ 112 using Elf_Vernaux = typename ELFT::Vernaux; \ 113 using Elf_Verdef = typename ELFT::Verdef; \ 114 using Elf_Verdaux = typename ELFT::Verdaux; \ 115 using Elf_CGProfile = typename ELFT::CGProfile; \ 116 using uintX_t = typename ELFT::uint; 117 118 namespace { 119 120 template <class ELFT> class DumpStyle; 121 122 /// Represents a contiguous uniform range in the file. We cannot just create a 123 /// range directly because when creating one of these from the .dynamic table 124 /// the size, entity size and virtual address are different entries in arbitrary 125 /// order (DT_REL, DT_RELSZ, DT_RELENT for example). 126 struct DynRegionInfo { 127 DynRegionInfo(StringRef ObjName) : FileName(ObjName) {} 128 DynRegionInfo(const void *A, uint64_t S, uint64_t ES, StringRef ObjName) 129 : Addr(A), Size(S), EntSize(ES), FileName(ObjName) {} 130 131 /// Address in current address space. 132 const void *Addr = nullptr; 133 /// Size in bytes of the region. 134 uint64_t Size = 0; 135 /// Size of each entity in the region. 136 uint64_t EntSize = 0; 137 138 /// Name of the file. Used for error reporting. 139 StringRef FileName; 140 /// Error prefix. Used for error reporting to provide more information. 141 std::string Context; 142 /// Region size name. Used for error reporting. 143 StringRef SizePrintName = "size"; 144 /// Entry size name. Used for error reporting. If this field is empty, errors 145 /// will not mention the entry size. 146 StringRef EntSizePrintName = "entry size"; 147 148 template <typename Type> ArrayRef<Type> getAsArrayRef() const { 149 const Type *Start = reinterpret_cast<const Type *>(Addr); 150 if (!Start) 151 return {Start, Start}; 152 if (EntSize == sizeof(Type) && (Size % EntSize == 0)) 153 return {Start, Start + (Size / EntSize)}; 154 155 std::string Msg; 156 if (!Context.empty()) 157 Msg += Context + " has "; 158 159 Msg += ("invalid " + SizePrintName + " (0x" + Twine::utohexstr(Size) + ")") 160 .str(); 161 if (!EntSizePrintName.empty()) 162 Msg += 163 (" or " + EntSizePrintName + " (0x" + Twine::utohexstr(EntSize) + ")") 164 .str(); 165 166 reportWarning(createError(Msg.c_str()), FileName); 167 return {Start, Start}; 168 } 169 }; 170 171 namespace { 172 struct VerdAux { 173 unsigned Offset; 174 std::string Name; 175 }; 176 177 struct VerDef { 178 unsigned Offset; 179 unsigned Version; 180 unsigned Flags; 181 unsigned Ndx; 182 unsigned Cnt; 183 unsigned Hash; 184 std::string Name; 185 std::vector<VerdAux> AuxV; 186 }; 187 188 struct VernAux { 189 unsigned Hash; 190 unsigned Flags; 191 unsigned Other; 192 unsigned Offset; 193 std::string Name; 194 }; 195 196 struct VerNeed { 197 unsigned Version; 198 unsigned Cnt; 199 unsigned Offset; 200 std::string File; 201 std::vector<VernAux> AuxV; 202 }; 203 204 } // namespace 205 206 template <typename ELFT> class ELFDumper : public ObjDumper { 207 public: 208 ELFDumper(const object::ELFObjectFile<ELFT> *ObjF, ScopedPrinter &Writer); 209 210 void printFileHeaders() override; 211 void printSectionHeaders() override; 212 void printRelocations() override; 213 void printDependentLibs() override; 214 void printDynamicRelocations() override; 215 void printSymbols(bool PrintSymbols, bool PrintDynamicSymbols) override; 216 void printHashSymbols() override; 217 void printUnwindInfo() override; 218 219 void printDynamicTable() override; 220 void printNeededLibraries() override; 221 void printProgramHeaders(bool PrintProgramHeaders, 222 cl::boolOrDefault PrintSectionMapping) override; 223 void printHashTable() override; 224 void printGnuHashTable(const object::ObjectFile *Obj) override; 225 void printLoadName() override; 226 void printVersionInfo() override; 227 void printGroupSections() override; 228 229 void printArchSpecificInfo() override; 230 231 void printStackMap() const override; 232 233 void printHashHistograms() override; 234 235 void printCGProfile() override; 236 void printAddrsig() override; 237 238 void printNotes() override; 239 240 void printELFLinkerOptions() override; 241 void printStackSizes() override; 242 243 const object::ELFObjectFile<ELFT> *getElfObject() const { return ObjF; }; 244 245 private: 246 std::unique_ptr<DumpStyle<ELFT>> ELFDumperStyle; 247 248 TYPEDEF_ELF_TYPES(ELFT) 249 250 DynRegionInfo checkDRI(DynRegionInfo DRI) { 251 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 252 if (DRI.Addr < Obj->base() || 253 reinterpret_cast<const uint8_t *>(DRI.Addr) + DRI.Size > 254 Obj->base() + Obj->getBufSize()) 255 reportError(errorCodeToError(llvm::object::object_error::parse_failed), 256 ObjF->getFileName()); 257 return DRI; 258 } 259 260 DynRegionInfo createDRIFrom(const Elf_Phdr *P, uintX_t EntSize) { 261 return checkDRI({ObjF->getELFFile()->base() + P->p_offset, P->p_filesz, 262 EntSize, ObjF->getFileName()}); 263 } 264 265 DynRegionInfo createDRIFrom(const Elf_Shdr *S) { 266 return checkDRI({ObjF->getELFFile()->base() + S->sh_offset, S->sh_size, 267 S->sh_entsize, ObjF->getFileName()}); 268 } 269 270 void printAttributes(); 271 void printMipsReginfo(); 272 void printMipsOptions(); 273 274 std::pair<const Elf_Phdr *, const Elf_Shdr *> 275 findDynamic(const ELFFile<ELFT> *Obj); 276 void loadDynamicTable(const ELFFile<ELFT> *Obj); 277 void parseDynamicTable(const ELFFile<ELFT> *Obj); 278 279 Expected<StringRef> getSymbolVersion(const Elf_Sym *symb, 280 bool &IsDefault) const; 281 Error LoadVersionMap() const; 282 283 const object::ELFObjectFile<ELFT> *ObjF; 284 DynRegionInfo DynRelRegion; 285 DynRegionInfo DynRelaRegion; 286 DynRegionInfo DynRelrRegion; 287 DynRegionInfo DynPLTRelRegion; 288 Optional<DynRegionInfo> DynSymRegion; 289 DynRegionInfo DynamicTable; 290 StringRef DynamicStringTable; 291 StringRef SOName = "<Not found>"; 292 const Elf_Hash *HashTable = nullptr; 293 const Elf_GnuHash *GnuHashTable = nullptr; 294 const Elf_Shdr *DotSymtabSec = nullptr; 295 const Elf_Shdr *DotCGProfileSec = nullptr; 296 const Elf_Shdr *DotAddrsigSec = nullptr; 297 StringRef DynSymtabName; 298 ArrayRef<Elf_Word> ShndxTable; 299 300 const Elf_Shdr *SymbolVersionSection = nullptr; // .gnu.version 301 const Elf_Shdr *SymbolVersionNeedSection = nullptr; // .gnu.version_r 302 const Elf_Shdr *SymbolVersionDefSection = nullptr; // .gnu.version_d 303 304 struct VersionEntry { 305 std::string Name; 306 bool IsVerDef; 307 }; 308 mutable SmallVector<Optional<VersionEntry>, 16> VersionMap; 309 310 std::unordered_set<std::string> Warnings; 311 312 public: 313 Elf_Dyn_Range dynamic_table() const { 314 // A valid .dynamic section contains an array of entries terminated 315 // with a DT_NULL entry. However, sometimes the section content may 316 // continue past the DT_NULL entry, so to dump the section correctly, 317 // we first find the end of the entries by iterating over them. 318 Elf_Dyn_Range Table = DynamicTable.getAsArrayRef<Elf_Dyn>(); 319 320 size_t Size = 0; 321 while (Size < Table.size()) 322 if (Table[Size++].getTag() == DT_NULL) 323 break; 324 325 return Table.slice(0, Size); 326 } 327 328 Optional<DynRegionInfo> getDynSymRegion() const { return DynSymRegion; } 329 330 Elf_Sym_Range dynamic_symbols() const { 331 if (!DynSymRegion) 332 return Elf_Sym_Range(); 333 return DynSymRegion->getAsArrayRef<Elf_Sym>(); 334 } 335 336 Elf_Rel_Range dyn_rels() const; 337 Elf_Rela_Range dyn_relas() const; 338 Elf_Relr_Range dyn_relrs() const; 339 std::string getFullSymbolName(const Elf_Sym *Symbol, StringRef StrTable, 340 bool IsDynamic) const; 341 Expected<unsigned> getSymbolSectionIndex(const Elf_Sym *Symbol, 342 const Elf_Sym *FirstSym) const; 343 Expected<StringRef> getSymbolSectionName(const Elf_Sym *Symbol, 344 unsigned SectionIndex) const; 345 Expected<std::string> getStaticSymbolName(uint32_t Index) const; 346 StringRef getDynamicString(uint64_t Value) const; 347 Expected<StringRef> getSymbolVersionByIndex(uint32_t VersionSymbolIndex, 348 bool &IsDefault) const; 349 350 void printSymbolsHelper(bool IsDynamic) const; 351 std::string getDynamicEntry(uint64_t Type, uint64_t Value) const; 352 353 const Elf_Shdr *getDotSymtabSec() const { return DotSymtabSec; } 354 const Elf_Shdr *getDotCGProfileSec() const { return DotCGProfileSec; } 355 const Elf_Shdr *getDotAddrsigSec() const { return DotAddrsigSec; } 356 ArrayRef<Elf_Word> getShndxTable() const { return ShndxTable; } 357 StringRef getDynamicStringTable() const { return DynamicStringTable; } 358 const DynRegionInfo &getDynRelRegion() const { return DynRelRegion; } 359 const DynRegionInfo &getDynRelaRegion() const { return DynRelaRegion; } 360 const DynRegionInfo &getDynRelrRegion() const { return DynRelrRegion; } 361 const DynRegionInfo &getDynPLTRelRegion() const { return DynPLTRelRegion; } 362 const DynRegionInfo &getDynamicTableRegion() const { return DynamicTable; } 363 const Elf_Hash *getHashTable() const { return HashTable; } 364 const Elf_GnuHash *getGnuHashTable() const { return GnuHashTable; } 365 366 Expected<ArrayRef<Elf_Versym>> getVersionTable(const Elf_Shdr *Sec, 367 ArrayRef<Elf_Sym> *SymTab, 368 StringRef *StrTab) const; 369 Expected<std::vector<VerDef>> 370 getVersionDefinitions(const Elf_Shdr *Sec) const; 371 Expected<std::vector<VerNeed>> 372 getVersionDependencies(const Elf_Shdr *Sec) const; 373 374 Expected<std::pair<const Elf_Sym *, std::string>> 375 getRelocationTarget(const Elf_Shdr *SymTab, const Elf_Rela &R) const; 376 377 std::function<Error(const Twine &Msg)> WarningHandler; 378 void reportUniqueWarning(Error Err) const; 379 }; 380 381 template <class ELFT> 382 static Expected<StringRef> getLinkAsStrtab(const ELFFile<ELFT> *Obj, 383 const typename ELFT::Shdr *Sec, 384 unsigned SecNdx) { 385 Expected<const typename ELFT::Shdr *> StrTabSecOrErr = 386 Obj->getSection(Sec->sh_link); 387 if (!StrTabSecOrErr) 388 return createError("invalid section linked to " + 389 object::getELFSectionTypeName( 390 Obj->getHeader()->e_machine, Sec->sh_type) + 391 " section with index " + Twine(SecNdx) + ": " + 392 toString(StrTabSecOrErr.takeError())); 393 394 Expected<StringRef> StrTabOrErr = Obj->getStringTable(*StrTabSecOrErr); 395 if (!StrTabOrErr) 396 return createError("invalid string table linked to " + 397 object::getELFSectionTypeName( 398 Obj->getHeader()->e_machine, Sec->sh_type) + 399 " section with index " + Twine(SecNdx) + ": " + 400 toString(StrTabOrErr.takeError())); 401 return *StrTabOrErr; 402 } 403 404 // Returns the linked symbol table and associated string table for a given section. 405 template <class ELFT> 406 static Expected<std::pair<typename ELFT::SymRange, StringRef>> 407 getLinkAsSymtab(const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec, 408 unsigned SecNdx, unsigned ExpectedType) { 409 Expected<const typename ELFT::Shdr *> SymtabOrErr = 410 Obj->getSection(Sec->sh_link); 411 if (!SymtabOrErr) 412 return createError("invalid section linked to " + 413 object::getELFSectionTypeName( 414 Obj->getHeader()->e_machine, Sec->sh_type) + 415 " section with index " + Twine(SecNdx) + ": " + 416 toString(SymtabOrErr.takeError())); 417 418 if ((*SymtabOrErr)->sh_type != ExpectedType) 419 return createError( 420 "invalid section linked to " + 421 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 422 Sec->sh_type) + 423 " section with index " + Twine(SecNdx) + ": expected " + 424 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 425 ExpectedType) + 426 ", but got " + 427 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 428 (*SymtabOrErr)->sh_type)); 429 430 Expected<StringRef> StrTabOrErr = 431 getLinkAsStrtab(Obj, *SymtabOrErr, Sec->sh_link); 432 if (!StrTabOrErr) 433 return createError( 434 "can't get a string table for the symbol table linked to " + 435 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 436 Sec->sh_type) + 437 " section with index " + Twine(SecNdx) + ": " + 438 toString(StrTabOrErr.takeError())); 439 440 Expected<typename ELFT::SymRange> SymsOrErr = Obj->symbols(*SymtabOrErr); 441 if (!SymsOrErr) 442 return createError( 443 "unable to read symbols from the symbol table with index " + 444 Twine(Sec->sh_link) + ": " + toString(SymsOrErr.takeError())); 445 446 return std::make_pair(*SymsOrErr, *StrTabOrErr); 447 } 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) const { 453 assert((!SymTab && !StrTab) || (SymTab && StrTab)); 454 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 455 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 456 457 if (uintptr_t(Obj->base() + Sec->sh_offset) % sizeof(uint16_t) != 0) 458 return createError("the SHT_GNU_versym section with index " + 459 Twine(SecNdx) + " is misaligned"); 460 461 Expected<ArrayRef<Elf_Versym>> VersionsOrErr = 462 Obj->template getSectionContentsAsArray<Elf_Versym>(Sec); 463 if (!VersionsOrErr) 464 return createError( 465 "cannot read content of SHT_GNU_versym section with index " + 466 Twine(SecNdx) + ": " + toString(VersionsOrErr.takeError())); 467 468 Expected<std::pair<ArrayRef<Elf_Sym>, StringRef>> SymTabOrErr = 469 getLinkAsSymtab(Obj, Sec, SecNdx, SHT_DYNSYM); 470 if (!SymTabOrErr) { 471 reportUniqueWarning(SymTabOrErr.takeError()); 472 return *VersionsOrErr; 473 } 474 475 if (SymTabOrErr->first.size() != VersionsOrErr->size()) 476 reportUniqueWarning( 477 createError("SHT_GNU_versym section with index " + Twine(SecNdx) + 478 ": the number of entries (" + Twine(VersionsOrErr->size()) + 479 ") does not match the number of symbols (" + 480 Twine(SymTabOrErr->first.size()) + 481 ") in the symbol table with index " + Twine(Sec->sh_link))); 482 483 if (SymTab) 484 std::tie(*SymTab, *StrTab) = *SymTabOrErr; 485 return *VersionsOrErr; 486 } 487 488 template <class ELFT> 489 Expected<std::vector<VerDef>> 490 ELFDumper<ELFT>::getVersionDefinitions(const Elf_Shdr *Sec) const { 491 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 492 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 493 494 Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx); 495 if (!StrTabOrErr) 496 return StrTabOrErr.takeError(); 497 498 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec); 499 if (!ContentsOrErr) 500 return createError( 501 "cannot read content of SHT_GNU_verdef section with index " + 502 Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError())); 503 504 const uint8_t *Start = ContentsOrErr->data(); 505 const uint8_t *End = Start + ContentsOrErr->size(); 506 507 auto ExtractNextAux = [&](const uint8_t *&VerdauxBuf, 508 unsigned VerDefNdx) -> Expected<VerdAux> { 509 if (VerdauxBuf + sizeof(Elf_Verdaux) > End) 510 return createError("invalid SHT_GNU_verdef section with index " + 511 Twine(SecNdx) + ": version definition " + 512 Twine(VerDefNdx) + 513 " refers to an auxiliary entry that goes past the end " 514 "of the section"); 515 516 auto *Verdaux = reinterpret_cast<const Elf_Verdaux *>(VerdauxBuf); 517 VerdauxBuf += Verdaux->vda_next; 518 519 VerdAux Aux; 520 Aux.Offset = VerdauxBuf - Start; 521 if (Verdaux->vda_name <= StrTabOrErr->size()) 522 Aux.Name = std::string(StrTabOrErr->drop_front(Verdaux->vda_name)); 523 else 524 Aux.Name = "<invalid vda_name: " + to_string(Verdaux->vda_name) + ">"; 525 return Aux; 526 }; 527 528 std::vector<VerDef> Ret; 529 const uint8_t *VerdefBuf = Start; 530 for (unsigned I = 1; I <= /*VerDefsNum=*/Sec->sh_info; ++I) { 531 if (VerdefBuf + sizeof(Elf_Verdef) > End) 532 return createError("invalid SHT_GNU_verdef section with index " + 533 Twine(SecNdx) + ": version definition " + Twine(I) + 534 " goes past the end of the section"); 535 536 if (uintptr_t(VerdefBuf) % sizeof(uint32_t) != 0) 537 return createError( 538 "invalid SHT_GNU_verdef section with index " + Twine(SecNdx) + 539 ": found a misaligned version definition entry at offset 0x" + 540 Twine::utohexstr(VerdefBuf - Start)); 541 542 unsigned Version = *reinterpret_cast<const Elf_Half *>(VerdefBuf); 543 if (Version != 1) 544 return createError("unable to dump SHT_GNU_verdef section with index " + 545 Twine(SecNdx) + ": version " + Twine(Version) + 546 " is not yet supported"); 547 548 const Elf_Verdef *D = reinterpret_cast<const Elf_Verdef *>(VerdefBuf); 549 VerDef &VD = *Ret.emplace(Ret.end()); 550 VD.Offset = VerdefBuf - Start; 551 VD.Version = D->vd_version; 552 VD.Flags = D->vd_flags; 553 VD.Ndx = D->vd_ndx; 554 VD.Cnt = D->vd_cnt; 555 VD.Hash = D->vd_hash; 556 557 const uint8_t *VerdauxBuf = VerdefBuf + D->vd_aux; 558 for (unsigned J = 0; J < D->vd_cnt; ++J) { 559 if (uintptr_t(VerdauxBuf) % sizeof(uint32_t) != 0) 560 return createError("invalid SHT_GNU_verdef section with index " + 561 Twine(SecNdx) + 562 ": found a misaligned auxiliary entry at offset 0x" + 563 Twine::utohexstr(VerdauxBuf - Start)); 564 565 Expected<VerdAux> AuxOrErr = ExtractNextAux(VerdauxBuf, I); 566 if (!AuxOrErr) 567 return AuxOrErr.takeError(); 568 569 if (J == 0) 570 VD.Name = AuxOrErr->Name; 571 else 572 VD.AuxV.push_back(*AuxOrErr); 573 } 574 575 VerdefBuf += D->vd_next; 576 } 577 578 return Ret; 579 } 580 581 template <class ELFT> 582 Expected<std::vector<VerNeed>> 583 ELFDumper<ELFT>::getVersionDependencies(const Elf_Shdr *Sec) const { 584 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 585 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 586 587 StringRef StrTab; 588 Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx); 589 if (!StrTabOrErr) 590 reportUniqueWarning(StrTabOrErr.takeError()); 591 else 592 StrTab = *StrTabOrErr; 593 594 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec); 595 if (!ContentsOrErr) 596 return createError( 597 "cannot read content of SHT_GNU_verneed section with index " + 598 Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError())); 599 600 const uint8_t *Start = ContentsOrErr->data(); 601 const uint8_t *End = Start + ContentsOrErr->size(); 602 const uint8_t *VerneedBuf = Start; 603 604 std::vector<VerNeed> Ret; 605 for (unsigned I = 1; I <= /*VerneedNum=*/Sec->sh_info; ++I) { 606 if (VerneedBuf + sizeof(Elf_Verdef) > End) 607 return createError("invalid SHT_GNU_verneed section with index " + 608 Twine(SecNdx) + ": version dependency " + Twine(I) + 609 " goes past the end of the section"); 610 611 if (uintptr_t(VerneedBuf) % sizeof(uint32_t) != 0) 612 return createError( 613 "invalid SHT_GNU_verneed section with index " + Twine(SecNdx) + 614 ": found a misaligned version dependency entry at offset 0x" + 615 Twine::utohexstr(VerneedBuf - Start)); 616 617 unsigned Version = *reinterpret_cast<const Elf_Half *>(VerneedBuf); 618 if (Version != 1) 619 return createError("unable to dump SHT_GNU_verneed section with index " + 620 Twine(SecNdx) + ": version " + Twine(Version) + 621 " is not yet supported"); 622 623 const Elf_Verneed *Verneed = 624 reinterpret_cast<const Elf_Verneed *>(VerneedBuf); 625 626 VerNeed &VN = *Ret.emplace(Ret.end()); 627 VN.Version = Verneed->vn_version; 628 VN.Cnt = Verneed->vn_cnt; 629 VN.Offset = VerneedBuf - Start; 630 631 if (Verneed->vn_file < StrTab.size()) 632 VN.File = std::string(StrTab.drop_front(Verneed->vn_file)); 633 else 634 VN.File = "<corrupt vn_file: " + to_string(Verneed->vn_file) + ">"; 635 636 const uint8_t *VernauxBuf = VerneedBuf + Verneed->vn_aux; 637 for (unsigned J = 0; J < Verneed->vn_cnt; ++J) { 638 if (uintptr_t(VernauxBuf) % sizeof(uint32_t) != 0) 639 return createError("invalid SHT_GNU_verneed section with index " + 640 Twine(SecNdx) + 641 ": found a misaligned auxiliary entry at offset 0x" + 642 Twine::utohexstr(VernauxBuf - Start)); 643 644 if (VernauxBuf + sizeof(Elf_Vernaux) > End) 645 return createError( 646 "invalid SHT_GNU_verneed section with index " + Twine(SecNdx) + 647 ": version dependency " + Twine(I) + 648 " refers to an auxiliary entry that goes past the end " 649 "of the section"); 650 651 const Elf_Vernaux *Vernaux = 652 reinterpret_cast<const Elf_Vernaux *>(VernauxBuf); 653 654 VernAux &Aux = *VN.AuxV.emplace(VN.AuxV.end()); 655 Aux.Hash = Vernaux->vna_hash; 656 Aux.Flags = Vernaux->vna_flags; 657 Aux.Other = Vernaux->vna_other; 658 Aux.Offset = VernauxBuf - Start; 659 if (StrTab.size() <= Vernaux->vna_name) 660 Aux.Name = "<corrupt>"; 661 else 662 Aux.Name = std::string(StrTab.drop_front(Vernaux->vna_name)); 663 664 VernauxBuf += Vernaux->vna_next; 665 } 666 VerneedBuf += Verneed->vn_next; 667 } 668 return Ret; 669 } 670 671 template <class ELFT> 672 void ELFDumper<ELFT>::printSymbolsHelper(bool IsDynamic) const { 673 StringRef StrTable, SymtabName; 674 size_t Entries = 0; 675 Elf_Sym_Range Syms(nullptr, nullptr); 676 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 677 if (IsDynamic) { 678 StrTable = DynamicStringTable; 679 Syms = dynamic_symbols(); 680 SymtabName = DynSymtabName; 681 Entries = Syms.size(); 682 } else { 683 if (!DotSymtabSec) 684 return; 685 StrTable = unwrapOrError(ObjF->getFileName(), 686 Obj->getStringTableForSymtab(*DotSymtabSec)); 687 Syms = unwrapOrError(ObjF->getFileName(), Obj->symbols(DotSymtabSec)); 688 SymtabName = 689 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DotSymtabSec)); 690 Entries = DotSymtabSec->getEntityCount(); 691 } 692 if (Syms.begin() == Syms.end()) 693 return; 694 695 // The st_other field has 2 logical parts. The first two bits hold the symbol 696 // visibility (STV_*) and the remainder hold other platform-specific values. 697 bool NonVisibilityBitsUsed = llvm::find_if(Syms, [](const Elf_Sym &S) { 698 return S.st_other & ~0x3; 699 }) != Syms.end(); 700 701 ELFDumperStyle->printSymtabMessage(Obj, SymtabName, Entries, 702 NonVisibilityBitsUsed); 703 for (const auto &Sym : Syms) 704 ELFDumperStyle->printSymbol(Obj, &Sym, Syms.begin(), StrTable, IsDynamic, 705 NonVisibilityBitsUsed); 706 } 707 708 template <class ELFT> class MipsGOTParser; 709 710 template <typename ELFT> class DumpStyle { 711 public: 712 using Elf_Shdr = typename ELFT::Shdr; 713 using Elf_Sym = typename ELFT::Sym; 714 using Elf_Addr = typename ELFT::Addr; 715 716 DumpStyle(ELFDumper<ELFT> *Dumper) : Dumper(Dumper) { 717 FileName = this->Dumper->getElfObject()->getFileName(); 718 } 719 720 virtual ~DumpStyle() = default; 721 722 virtual void printFileHeaders(const ELFFile<ELFT> *Obj) = 0; 723 virtual void printGroupSections(const ELFFile<ELFT> *Obj) = 0; 724 virtual void printRelocations(const ELFFile<ELFT> *Obj) = 0; 725 virtual void printSectionHeaders(const ELFFile<ELFT> *Obj) = 0; 726 virtual void printSymbols(const ELFFile<ELFT> *Obj, bool PrintSymbols, 727 bool PrintDynamicSymbols) = 0; 728 virtual void printHashSymbols(const ELFFile<ELFT> *Obj) {} 729 virtual void printDependentLibs(const ELFFile<ELFT> *Obj) = 0; 730 virtual void printDynamic(const ELFFile<ELFT> *Obj) {} 731 virtual void printDynamicRelocations(const ELFFile<ELFT> *Obj) = 0; 732 virtual void printSymtabMessage(const ELFFile<ELFT> *Obj, StringRef Name, 733 size_t Offset, bool NonVisibilityBitsUsed) {} 734 virtual void printSymbol(const ELFFile<ELFT> *Obj, const Elf_Sym *Symbol, 735 const Elf_Sym *FirstSym, StringRef StrTable, 736 bool IsDynamic, bool NonVisibilityBitsUsed) = 0; 737 virtual void printProgramHeaders(const ELFFile<ELFT> *Obj, 738 bool PrintProgramHeaders, 739 cl::boolOrDefault PrintSectionMapping) = 0; 740 virtual void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 741 const Elf_Shdr *Sec) = 0; 742 virtual void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 743 const Elf_Shdr *Sec) = 0; 744 virtual void printVersionDependencySection(const ELFFile<ELFT> *Obj, 745 const Elf_Shdr *Sec) = 0; 746 virtual void printHashHistograms(const ELFFile<ELFT> *Obj) = 0; 747 virtual void printCGProfile(const ELFFile<ELFT> *Obj) = 0; 748 virtual void printAddrsig(const ELFFile<ELFT> *Obj) = 0; 749 virtual void printNotes(const ELFFile<ELFT> *Obj) = 0; 750 virtual void printELFLinkerOptions(const ELFFile<ELFT> *Obj) = 0; 751 virtual void printStackSizes(const ELFObjectFile<ELFT> *Obj) = 0; 752 void printNonRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj, 753 std::function<void()> PrintHeader); 754 void printRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj, 755 std::function<void()> PrintHeader); 756 void printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, uint64_t SymValue, 757 Optional<SectionRef> FunctionSec, 758 const StringRef SectionName, DataExtractor Data, 759 uint64_t *Offset); 760 void printStackSize(const ELFObjectFile<ELFT> *Obj, RelocationRef Rel, 761 SectionRef FunctionSec, 762 const StringRef &StackSizeSectionName, 763 const RelocationResolver &Resolver, DataExtractor Data); 764 virtual void printStackSizeEntry(uint64_t Size, StringRef FuncName) = 0; 765 virtual void printMipsGOT(const MipsGOTParser<ELFT> &Parser) = 0; 766 virtual void printMipsPLT(const MipsGOTParser<ELFT> &Parser) = 0; 767 virtual void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) = 0; 768 const ELFDumper<ELFT> *dumper() const { return Dumper; } 769 770 protected: 771 void printDependentLibsHelper( 772 const ELFFile<ELFT> *Obj, 773 function_ref<void(const Elf_Shdr &)> OnSectionStart, 774 function_ref<void(StringRef, uint64_t)> OnSectionEntry); 775 776 void reportUniqueWarning(Error Err) const; 777 StringRef FileName; 778 779 private: 780 const ELFDumper<ELFT> *Dumper; 781 }; 782 783 template <typename ELFT> class GNUStyle : public DumpStyle<ELFT> { 784 formatted_raw_ostream &OS; 785 786 public: 787 TYPEDEF_ELF_TYPES(ELFT) 788 789 GNUStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper) 790 : DumpStyle<ELFT>(Dumper), 791 OS(static_cast<formatted_raw_ostream&>(W.getOStream())) { 792 assert (&W.getOStream() == &llvm::fouts()); 793 } 794 795 void printFileHeaders(const ELFO *Obj) override; 796 void printGroupSections(const ELFFile<ELFT> *Obj) override; 797 void printRelocations(const ELFO *Obj) override; 798 void printSectionHeaders(const ELFO *Obj) override; 799 void printSymbols(const ELFO *Obj, bool PrintSymbols, 800 bool PrintDynamicSymbols) override; 801 void printHashSymbols(const ELFO *Obj) override; 802 void printDependentLibs(const ELFFile<ELFT> *Obj) override; 803 void printDynamic(const ELFFile<ELFT> *Obj) override; 804 void printDynamicRelocations(const ELFO *Obj) override; 805 void printSymtabMessage(const ELFO *Obj, StringRef Name, size_t Offset, 806 bool NonVisibilityBitsUsed) override; 807 void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders, 808 cl::boolOrDefault PrintSectionMapping) override; 809 void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 810 const Elf_Shdr *Sec) override; 811 void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 812 const Elf_Shdr *Sec) override; 813 void printVersionDependencySection(const ELFFile<ELFT> *Obj, 814 const Elf_Shdr *Sec) override; 815 void printHashHistograms(const ELFFile<ELFT> *Obj) override; 816 void printCGProfile(const ELFFile<ELFT> *Obj) override; 817 void printAddrsig(const ELFFile<ELFT> *Obj) override; 818 void printNotes(const ELFFile<ELFT> *Obj) override; 819 void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override; 820 void printStackSizes(const ELFObjectFile<ELFT> *Obj) override; 821 void printStackSizeEntry(uint64_t Size, StringRef FuncName) override; 822 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 823 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 824 void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override; 825 826 private: 827 void printHashHistogram(const Elf_Hash &HashTable); 828 void printGnuHashHistogram(const Elf_GnuHash &GnuHashTable); 829 830 struct Field { 831 std::string Str; 832 unsigned Column; 833 834 Field(StringRef S, unsigned Col) : Str(std::string(S)), Column(Col) {} 835 Field(unsigned Col) : Column(Col) {} 836 }; 837 838 template <typename T, typename TEnum> 839 std::string printEnum(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues) { 840 for (const auto &EnumItem : EnumValues) 841 if (EnumItem.Value == Value) 842 return std::string(EnumItem.AltName); 843 return to_hexString(Value, false); 844 } 845 846 template <typename T, typename TEnum> 847 std::string printFlags(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues, 848 TEnum EnumMask1 = {}, TEnum EnumMask2 = {}, 849 TEnum EnumMask3 = {}) { 850 std::string Str; 851 for (const auto &Flag : EnumValues) { 852 if (Flag.Value == 0) 853 continue; 854 855 TEnum EnumMask{}; 856 if (Flag.Value & EnumMask1) 857 EnumMask = EnumMask1; 858 else if (Flag.Value & EnumMask2) 859 EnumMask = EnumMask2; 860 else if (Flag.Value & EnumMask3) 861 EnumMask = EnumMask3; 862 bool IsEnum = (Flag.Value & EnumMask) != 0; 863 if ((!IsEnum && (Value & Flag.Value) == Flag.Value) || 864 (IsEnum && (Value & EnumMask) == Flag.Value)) { 865 if (!Str.empty()) 866 Str += ", "; 867 Str += Flag.AltName; 868 } 869 } 870 return Str; 871 } 872 873 formatted_raw_ostream &printField(struct Field F) { 874 if (F.Column != 0) 875 OS.PadToColumn(F.Column); 876 OS << F.Str; 877 OS.flush(); 878 return OS; 879 } 880 void printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, uint32_t Sym, 881 StringRef StrTable, uint32_t Bucket); 882 void printRelocHeader(unsigned SType); 883 void printRelocation(const ELFO *Obj, unsigned SecIndex, 884 const Elf_Shdr *SymTab, const Elf_Rela &R, 885 unsigned RelIndex, bool IsRela); 886 void printRelocation(const ELFO *Obj, const Elf_Sym *Sym, 887 StringRef SymbolName, const Elf_Rela &R, bool IsRela); 888 void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First, 889 StringRef StrTable, bool IsDynamic, 890 bool NonVisibilityBitsUsed) override; 891 std::string getSymbolSectionNdx(const ELFO *Obj, const Elf_Sym *Symbol, 892 const Elf_Sym *FirstSym); 893 void printDynamicRelocation(const ELFO *Obj, Elf_Rela R, bool IsRela); 894 void printProgramHeaders(const ELFO *Obj); 895 void printSectionMapping(const ELFO *Obj); 896 void printGNUVersionSectionProlog(const ELFFile<ELFT> *Obj, 897 const typename ELFT::Shdr *Sec, 898 const Twine &Label, unsigned EntriesNum); 899 }; 900 901 template <class ELFT> 902 void ELFDumper<ELFT>::reportUniqueWarning(Error Err) const { 903 handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) { 904 cantFail(WarningHandler(EI.message()), 905 "WarningHandler should always return ErrorSuccess"); 906 }); 907 } 908 909 template <class ELFT> 910 void DumpStyle<ELFT>::reportUniqueWarning(Error Err) const { 911 this->dumper()->reportUniqueWarning(std::move(Err)); 912 } 913 914 template <typename ELFT> class LLVMStyle : public DumpStyle<ELFT> { 915 public: 916 TYPEDEF_ELF_TYPES(ELFT) 917 918 LLVMStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper) 919 : DumpStyle<ELFT>(Dumper), W(W) {} 920 921 void printFileHeaders(const ELFO *Obj) override; 922 void printGroupSections(const ELFFile<ELFT> *Obj) override; 923 void printRelocations(const ELFO *Obj) override; 924 void printRelocations(const Elf_Shdr *Sec, const ELFO *Obj); 925 void printSectionHeaders(const ELFO *Obj) override; 926 void printSymbols(const ELFO *Obj, bool PrintSymbols, 927 bool PrintDynamicSymbols) override; 928 void printDependentLibs(const ELFFile<ELFT> *Obj) override; 929 void printDynamic(const ELFFile<ELFT> *Obj) override; 930 void printDynamicRelocations(const ELFO *Obj) override; 931 void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders, 932 cl::boolOrDefault PrintSectionMapping) override; 933 void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 934 const Elf_Shdr *Sec) override; 935 void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 936 const Elf_Shdr *Sec) override; 937 void printVersionDependencySection(const ELFFile<ELFT> *Obj, 938 const Elf_Shdr *Sec) override; 939 void printHashHistograms(const ELFFile<ELFT> *Obj) override; 940 void printCGProfile(const ELFFile<ELFT> *Obj) override; 941 void printAddrsig(const ELFFile<ELFT> *Obj) override; 942 void printNotes(const ELFFile<ELFT> *Obj) override; 943 void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override; 944 void printStackSizes(const ELFObjectFile<ELFT> *Obj) override; 945 void printStackSizeEntry(uint64_t Size, StringRef FuncName) override; 946 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 947 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 948 void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override; 949 950 private: 951 void printRelocation(const ELFO *Obj, unsigned SecIndex, Elf_Rela Rel, 952 unsigned RelIndex, const Elf_Shdr *SymTab); 953 void printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel); 954 void printSymbols(const ELFO *Obj); 955 void printDynamicSymbols(const ELFO *Obj); 956 void printSymbolSection(const Elf_Sym *Symbol, const Elf_Sym *First); 957 void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First, 958 StringRef StrTable, bool IsDynamic, 959 bool /*NonVisibilityBitsUsed*/) override; 960 void printProgramHeaders(const ELFO *Obj); 961 void printSectionMapping(const ELFO *Obj) {} 962 963 ScopedPrinter &W; 964 }; 965 966 } // end anonymous namespace 967 968 namespace llvm { 969 970 template <class ELFT> 971 static std::error_code createELFDumper(const ELFObjectFile<ELFT> *Obj, 972 ScopedPrinter &Writer, 973 std::unique_ptr<ObjDumper> &Result) { 974 Result.reset(new ELFDumper<ELFT>(Obj, Writer)); 975 return readobj_error::success; 976 } 977 978 std::error_code createELFDumper(const object::ObjectFile *Obj, 979 ScopedPrinter &Writer, 980 std::unique_ptr<ObjDumper> &Result) { 981 // Little-endian 32-bit 982 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj)) 983 return createELFDumper(ELFObj, Writer, Result); 984 985 // Big-endian 32-bit 986 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj)) 987 return createELFDumper(ELFObj, Writer, Result); 988 989 // Little-endian 64-bit 990 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj)) 991 return createELFDumper(ELFObj, Writer, Result); 992 993 // Big-endian 64-bit 994 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj)) 995 return createELFDumper(ELFObj, Writer, Result); 996 997 return readobj_error::unsupported_obj_file_format; 998 } 999 1000 } // end namespace llvm 1001 1002 template <class ELFT> Error ELFDumper<ELFT>::LoadVersionMap() const { 1003 // If there is no dynamic symtab or version table, there is nothing to do. 1004 if (!DynSymRegion || !SymbolVersionSection) 1005 return Error::success(); 1006 1007 // Has the VersionMap already been loaded? 1008 if (!VersionMap.empty()) 1009 return Error::success(); 1010 1011 // The first two version indexes are reserved. 1012 // Index 0 is LOCAL, index 1 is GLOBAL. 1013 VersionMap.push_back(VersionEntry()); 1014 VersionMap.push_back(VersionEntry()); 1015 1016 auto InsertEntry = [this](unsigned N, StringRef Version, bool IsVerdef) { 1017 if (N >= VersionMap.size()) 1018 VersionMap.resize(N + 1); 1019 VersionMap[N] = {std::string(Version), IsVerdef}; 1020 }; 1021 1022 if (SymbolVersionDefSection) { 1023 Expected<std::vector<VerDef>> Defs = 1024 this->getVersionDefinitions(SymbolVersionDefSection); 1025 if (!Defs) 1026 return Defs.takeError(); 1027 for (const VerDef &Def : *Defs) 1028 InsertEntry(Def.Ndx & ELF::VERSYM_VERSION, Def.Name, true); 1029 } 1030 1031 if (SymbolVersionNeedSection) { 1032 Expected<std::vector<VerNeed>> Deps = 1033 this->getVersionDependencies(SymbolVersionNeedSection); 1034 if (!Deps) 1035 return Deps.takeError(); 1036 for (const VerNeed &Dep : *Deps) 1037 for (const VernAux &Aux : Dep.AuxV) 1038 InsertEntry(Aux.Other & ELF::VERSYM_VERSION, Aux.Name, false); 1039 } 1040 1041 return Error::success(); 1042 } 1043 1044 template <typename ELFT> 1045 Expected<StringRef> ELFDumper<ELFT>::getSymbolVersion(const Elf_Sym *Sym, 1046 bool &IsDefault) const { 1047 // This is a dynamic symbol. Look in the GNU symbol version table. 1048 if (!SymbolVersionSection) { 1049 // No version table. 1050 IsDefault = false; 1051 return ""; 1052 } 1053 1054 assert(DynSymRegion && "DynSymRegion has not been initialised"); 1055 // Determine the position in the symbol table of this entry. 1056 size_t EntryIndex = (reinterpret_cast<uintptr_t>(Sym) - 1057 reinterpret_cast<uintptr_t>(DynSymRegion->Addr)) / 1058 sizeof(Elf_Sym); 1059 1060 // Get the corresponding version index entry. 1061 const Elf_Versym *Versym = unwrapOrError( 1062 ObjF->getFileName(), ObjF->getELFFile()->template getEntry<Elf_Versym>( 1063 SymbolVersionSection, EntryIndex)); 1064 return this->getSymbolVersionByIndex(Versym->vs_index, IsDefault); 1065 } 1066 1067 template <typename ELFT> 1068 Expected<std::pair<const typename ELFT::Sym *, std::string>> 1069 ELFDumper<ELFT>::getRelocationTarget(const Elf_Shdr *SymTab, 1070 const Elf_Rela &R) const { 1071 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1072 Expected<const Elf_Sym *> SymOrErr = Obj->getRelocationSymbol(&R, SymTab); 1073 if (!SymOrErr) 1074 return SymOrErr.takeError(); 1075 const Elf_Sym *Sym = *SymOrErr; 1076 if (!Sym) 1077 return std::make_pair(nullptr, ""); 1078 1079 // The st_name field of a STT_SECTION is usually 0 (empty string). 1080 // This code block returns the section name. 1081 if (Sym->getType() == ELF::STT_SECTION) { 1082 Expected<const Elf_Shdr *> SecOrErr = 1083 Obj->getSection(Sym, SymTab, ShndxTable); 1084 if (!SecOrErr) 1085 return SecOrErr.takeError(); 1086 // A section symbol describes the section at index 0. 1087 if (*SecOrErr == nullptr) 1088 return std::make_pair(Sym, ""); 1089 1090 Expected<StringRef> NameOrErr = Obj->getSectionName(*SecOrErr); 1091 if (!NameOrErr) 1092 return NameOrErr.takeError(); 1093 return std::make_pair(Sym, NameOrErr->str()); 1094 } 1095 1096 Expected<StringRef> StrTableOrErr = Obj->getStringTableForSymtab(*SymTab); 1097 if (!StrTableOrErr) 1098 return StrTableOrErr.takeError(); 1099 1100 std::string SymbolName = 1101 getFullSymbolName(Sym, *StrTableOrErr, SymTab->sh_type == SHT_DYNSYM); 1102 return std::make_pair(Sym, SymbolName); 1103 } 1104 1105 static std::string maybeDemangle(StringRef Name) { 1106 return opts::Demangle ? demangle(std::string(Name)) : Name.str(); 1107 } 1108 1109 template <typename ELFT> 1110 Expected<std::string> 1111 ELFDumper<ELFT>::getStaticSymbolName(uint32_t Index) const { 1112 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1113 Expected<const typename ELFT::Sym *> SymOrErr = 1114 Obj->getSymbol(DotSymtabSec, Index); 1115 if (!SymOrErr) 1116 return SymOrErr.takeError(); 1117 1118 Expected<StringRef> StrTabOrErr = Obj->getStringTableForSymtab(*DotSymtabSec); 1119 if (!StrTabOrErr) 1120 return StrTabOrErr.takeError(); 1121 1122 Expected<StringRef> NameOrErr = (*SymOrErr)->getName(*StrTabOrErr); 1123 if (!NameOrErr) 1124 return NameOrErr.takeError(); 1125 return maybeDemangle(*NameOrErr); 1126 } 1127 1128 template <typename ELFT> 1129 Expected<StringRef> 1130 ELFDumper<ELFT>::getSymbolVersionByIndex(uint32_t SymbolVersionIndex, 1131 bool &IsDefault) const { 1132 size_t VersionIndex = SymbolVersionIndex & VERSYM_VERSION; 1133 1134 // Special markers for unversioned symbols. 1135 if (VersionIndex == VER_NDX_LOCAL || VersionIndex == VER_NDX_GLOBAL) { 1136 IsDefault = false; 1137 return ""; 1138 } 1139 1140 // Lookup this symbol in the version table. 1141 if (Error E = LoadVersionMap()) 1142 return std::move(E); 1143 if (VersionIndex >= VersionMap.size() || !VersionMap[VersionIndex]) 1144 return createError("SHT_GNU_versym section refers to a version index " + 1145 Twine(VersionIndex) + " which is missing"); 1146 1147 const VersionEntry &Entry = *VersionMap[VersionIndex]; 1148 if (Entry.IsVerDef) 1149 IsDefault = !(SymbolVersionIndex & VERSYM_HIDDEN); 1150 else 1151 IsDefault = false; 1152 return Entry.Name.c_str(); 1153 } 1154 1155 template <typename ELFT> 1156 std::string ELFDumper<ELFT>::getFullSymbolName(const Elf_Sym *Symbol, 1157 StringRef StrTable, 1158 bool IsDynamic) const { 1159 std::string SymbolName = maybeDemangle( 1160 unwrapOrError(ObjF->getFileName(), Symbol->getName(StrTable))); 1161 1162 if (SymbolName.empty() && Symbol->getType() == ELF::STT_SECTION) { 1163 Elf_Sym_Range Syms = unwrapOrError( 1164 ObjF->getFileName(), ObjF->getELFFile()->symbols(DotSymtabSec)); 1165 Expected<unsigned> SectionIndex = 1166 getSymbolSectionIndex(Symbol, Syms.begin()); 1167 if (!SectionIndex) { 1168 reportUniqueWarning(SectionIndex.takeError()); 1169 return "<?>"; 1170 } 1171 Expected<StringRef> NameOrErr = getSymbolSectionName(Symbol, *SectionIndex); 1172 if (!NameOrErr) { 1173 reportUniqueWarning(NameOrErr.takeError()); 1174 return ("<section " + Twine(*SectionIndex) + ">").str(); 1175 } 1176 return std::string(*NameOrErr); 1177 } 1178 1179 if (!IsDynamic) 1180 return SymbolName; 1181 1182 bool IsDefault; 1183 Expected<StringRef> VersionOrErr = getSymbolVersion(&*Symbol, IsDefault); 1184 if (!VersionOrErr) { 1185 reportUniqueWarning(VersionOrErr.takeError()); 1186 return SymbolName + "@<corrupt>"; 1187 } 1188 1189 if (!VersionOrErr->empty()) { 1190 SymbolName += (IsDefault ? "@@" : "@"); 1191 SymbolName += *VersionOrErr; 1192 } 1193 return SymbolName; 1194 } 1195 1196 template <typename ELFT> 1197 Expected<unsigned> 1198 ELFDumper<ELFT>::getSymbolSectionIndex(const Elf_Sym *Symbol, 1199 const Elf_Sym *FirstSym) const { 1200 return Symbol->st_shndx == SHN_XINDEX 1201 ? object::getExtendedSymbolTableIndex<ELFT>(Symbol, FirstSym, 1202 ShndxTable) 1203 : Symbol->st_shndx; 1204 } 1205 1206 // If the Symbol has a reserved st_shndx other than SHN_XINDEX, return a 1207 // descriptive interpretation of the st_shndx value. Otherwise, return the name 1208 // of the section with index SectionIndex. This function assumes that if the 1209 // Symbol has st_shndx == SHN_XINDEX the SectionIndex will be the value derived 1210 // from the SHT_SYMTAB_SHNDX section. 1211 template <typename ELFT> 1212 Expected<StringRef> 1213 ELFDumper<ELFT>::getSymbolSectionName(const Elf_Sym *Symbol, 1214 unsigned SectionIndex) const { 1215 if (Symbol->isUndefined()) 1216 return "Undefined"; 1217 if (Symbol->isProcessorSpecific()) 1218 return "Processor Specific"; 1219 if (Symbol->isOSSpecific()) 1220 return "Operating System Specific"; 1221 if (Symbol->isAbsolute()) 1222 return "Absolute"; 1223 if (Symbol->isCommon()) 1224 return "Common"; 1225 if (Symbol->isReserved() && Symbol->st_shndx != SHN_XINDEX) 1226 return "Reserved"; 1227 1228 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1229 Expected<const Elf_Shdr *> SecOrErr = 1230 Obj->getSection(SectionIndex); 1231 if (!SecOrErr) 1232 return SecOrErr.takeError(); 1233 return Obj->getSectionName(*SecOrErr); 1234 } 1235 1236 template <class ELFO> 1237 static const typename ELFO::Elf_Shdr * 1238 findNotEmptySectionByAddress(const ELFO *Obj, StringRef FileName, 1239 uint64_t Addr) { 1240 for (const auto &Shdr : unwrapOrError(FileName, Obj->sections())) 1241 if (Shdr.sh_addr == Addr && Shdr.sh_size > 0) 1242 return &Shdr; 1243 return nullptr; 1244 } 1245 1246 template <class ELFO> 1247 static const typename ELFO::Elf_Shdr * 1248 findSectionByName(const ELFO &Obj, StringRef FileName, StringRef Name) { 1249 for (const auto &Shdr : unwrapOrError(FileName, Obj.sections())) 1250 if (Name == unwrapOrError(FileName, Obj.getSectionName(&Shdr))) 1251 return &Shdr; 1252 return nullptr; 1253 } 1254 1255 static const EnumEntry<unsigned> ElfClass[] = { 1256 {"None", "none", ELF::ELFCLASSNONE}, 1257 {"32-bit", "ELF32", ELF::ELFCLASS32}, 1258 {"64-bit", "ELF64", ELF::ELFCLASS64}, 1259 }; 1260 1261 static const EnumEntry<unsigned> ElfDataEncoding[] = { 1262 {"None", "none", ELF::ELFDATANONE}, 1263 {"LittleEndian", "2's complement, little endian", ELF::ELFDATA2LSB}, 1264 {"BigEndian", "2's complement, big endian", ELF::ELFDATA2MSB}, 1265 }; 1266 1267 static const EnumEntry<unsigned> ElfObjectFileType[] = { 1268 {"None", "NONE (none)", ELF::ET_NONE}, 1269 {"Relocatable", "REL (Relocatable file)", ELF::ET_REL}, 1270 {"Executable", "EXEC (Executable file)", ELF::ET_EXEC}, 1271 {"SharedObject", "DYN (Shared object file)", ELF::ET_DYN}, 1272 {"Core", "CORE (Core file)", ELF::ET_CORE}, 1273 }; 1274 1275 static const EnumEntry<unsigned> ElfOSABI[] = { 1276 {"SystemV", "UNIX - System V", ELF::ELFOSABI_NONE}, 1277 {"HPUX", "UNIX - HP-UX", ELF::ELFOSABI_HPUX}, 1278 {"NetBSD", "UNIX - NetBSD", ELF::ELFOSABI_NETBSD}, 1279 {"GNU/Linux", "UNIX - GNU", ELF::ELFOSABI_LINUX}, 1280 {"GNU/Hurd", "GNU/Hurd", ELF::ELFOSABI_HURD}, 1281 {"Solaris", "UNIX - Solaris", ELF::ELFOSABI_SOLARIS}, 1282 {"AIX", "UNIX - AIX", ELF::ELFOSABI_AIX}, 1283 {"IRIX", "UNIX - IRIX", ELF::ELFOSABI_IRIX}, 1284 {"FreeBSD", "UNIX - FreeBSD", ELF::ELFOSABI_FREEBSD}, 1285 {"TRU64", "UNIX - TRU64", ELF::ELFOSABI_TRU64}, 1286 {"Modesto", "Novell - Modesto", ELF::ELFOSABI_MODESTO}, 1287 {"OpenBSD", "UNIX - OpenBSD", ELF::ELFOSABI_OPENBSD}, 1288 {"OpenVMS", "VMS - OpenVMS", ELF::ELFOSABI_OPENVMS}, 1289 {"NSK", "HP - Non-Stop Kernel", ELF::ELFOSABI_NSK}, 1290 {"AROS", "AROS", ELF::ELFOSABI_AROS}, 1291 {"FenixOS", "FenixOS", ELF::ELFOSABI_FENIXOS}, 1292 {"CloudABI", "CloudABI", ELF::ELFOSABI_CLOUDABI}, 1293 {"Standalone", "Standalone App", ELF::ELFOSABI_STANDALONE} 1294 }; 1295 1296 static const EnumEntry<unsigned> SymVersionFlags[] = { 1297 {"Base", "BASE", VER_FLG_BASE}, 1298 {"Weak", "WEAK", VER_FLG_WEAK}, 1299 {"Info", "INFO", VER_FLG_INFO}}; 1300 1301 static const EnumEntry<unsigned> AMDGPUElfOSABI[] = { 1302 {"AMDGPU_HSA", "AMDGPU - HSA", ELF::ELFOSABI_AMDGPU_HSA}, 1303 {"AMDGPU_PAL", "AMDGPU - PAL", ELF::ELFOSABI_AMDGPU_PAL}, 1304 {"AMDGPU_MESA3D", "AMDGPU - MESA3D", ELF::ELFOSABI_AMDGPU_MESA3D} 1305 }; 1306 1307 static const EnumEntry<unsigned> ARMElfOSABI[] = { 1308 {"ARM", "ARM", ELF::ELFOSABI_ARM} 1309 }; 1310 1311 static const EnumEntry<unsigned> C6000ElfOSABI[] = { 1312 {"C6000_ELFABI", "Bare-metal C6000", ELF::ELFOSABI_C6000_ELFABI}, 1313 {"C6000_LINUX", "Linux C6000", ELF::ELFOSABI_C6000_LINUX} 1314 }; 1315 1316 static const EnumEntry<unsigned> ElfMachineType[] = { 1317 ENUM_ENT(EM_NONE, "None"), 1318 ENUM_ENT(EM_M32, "WE32100"), 1319 ENUM_ENT(EM_SPARC, "Sparc"), 1320 ENUM_ENT(EM_386, "Intel 80386"), 1321 ENUM_ENT(EM_68K, "MC68000"), 1322 ENUM_ENT(EM_88K, "MC88000"), 1323 ENUM_ENT(EM_IAMCU, "EM_IAMCU"), 1324 ENUM_ENT(EM_860, "Intel 80860"), 1325 ENUM_ENT(EM_MIPS, "MIPS R3000"), 1326 ENUM_ENT(EM_S370, "IBM System/370"), 1327 ENUM_ENT(EM_MIPS_RS3_LE, "MIPS R3000 little-endian"), 1328 ENUM_ENT(EM_PARISC, "HPPA"), 1329 ENUM_ENT(EM_VPP500, "Fujitsu VPP500"), 1330 ENUM_ENT(EM_SPARC32PLUS, "Sparc v8+"), 1331 ENUM_ENT(EM_960, "Intel 80960"), 1332 ENUM_ENT(EM_PPC, "PowerPC"), 1333 ENUM_ENT(EM_PPC64, "PowerPC64"), 1334 ENUM_ENT(EM_S390, "IBM S/390"), 1335 ENUM_ENT(EM_SPU, "SPU"), 1336 ENUM_ENT(EM_V800, "NEC V800 series"), 1337 ENUM_ENT(EM_FR20, "Fujistsu FR20"), 1338 ENUM_ENT(EM_RH32, "TRW RH-32"), 1339 ENUM_ENT(EM_RCE, "Motorola RCE"), 1340 ENUM_ENT(EM_ARM, "ARM"), 1341 ENUM_ENT(EM_ALPHA, "EM_ALPHA"), 1342 ENUM_ENT(EM_SH, "Hitachi SH"), 1343 ENUM_ENT(EM_SPARCV9, "Sparc v9"), 1344 ENUM_ENT(EM_TRICORE, "Siemens Tricore"), 1345 ENUM_ENT(EM_ARC, "ARC"), 1346 ENUM_ENT(EM_H8_300, "Hitachi H8/300"), 1347 ENUM_ENT(EM_H8_300H, "Hitachi H8/300H"), 1348 ENUM_ENT(EM_H8S, "Hitachi H8S"), 1349 ENUM_ENT(EM_H8_500, "Hitachi H8/500"), 1350 ENUM_ENT(EM_IA_64, "Intel IA-64"), 1351 ENUM_ENT(EM_MIPS_X, "Stanford MIPS-X"), 1352 ENUM_ENT(EM_COLDFIRE, "Motorola Coldfire"), 1353 ENUM_ENT(EM_68HC12, "Motorola MC68HC12 Microcontroller"), 1354 ENUM_ENT(EM_MMA, "Fujitsu Multimedia Accelerator"), 1355 ENUM_ENT(EM_PCP, "Siemens PCP"), 1356 ENUM_ENT(EM_NCPU, "Sony nCPU embedded RISC processor"), 1357 ENUM_ENT(EM_NDR1, "Denso NDR1 microprocesspr"), 1358 ENUM_ENT(EM_STARCORE, "Motorola Star*Core processor"), 1359 ENUM_ENT(EM_ME16, "Toyota ME16 processor"), 1360 ENUM_ENT(EM_ST100, "STMicroelectronics ST100 processor"), 1361 ENUM_ENT(EM_TINYJ, "Advanced Logic Corp. TinyJ embedded processor"), 1362 ENUM_ENT(EM_X86_64, "Advanced Micro Devices X86-64"), 1363 ENUM_ENT(EM_PDSP, "Sony DSP processor"), 1364 ENUM_ENT(EM_PDP10, "Digital Equipment Corp. PDP-10"), 1365 ENUM_ENT(EM_PDP11, "Digital Equipment Corp. PDP-11"), 1366 ENUM_ENT(EM_FX66, "Siemens FX66 microcontroller"), 1367 ENUM_ENT(EM_ST9PLUS, "STMicroelectronics ST9+ 8/16 bit microcontroller"), 1368 ENUM_ENT(EM_ST7, "STMicroelectronics ST7 8-bit microcontroller"), 1369 ENUM_ENT(EM_68HC16, "Motorola MC68HC16 Microcontroller"), 1370 ENUM_ENT(EM_68HC11, "Motorola MC68HC11 Microcontroller"), 1371 ENUM_ENT(EM_68HC08, "Motorola MC68HC08 Microcontroller"), 1372 ENUM_ENT(EM_68HC05, "Motorola MC68HC05 Microcontroller"), 1373 ENUM_ENT(EM_SVX, "Silicon Graphics SVx"), 1374 ENUM_ENT(EM_ST19, "STMicroelectronics ST19 8-bit microcontroller"), 1375 ENUM_ENT(EM_VAX, "Digital VAX"), 1376 ENUM_ENT(EM_CRIS, "Axis Communications 32-bit embedded processor"), 1377 ENUM_ENT(EM_JAVELIN, "Infineon Technologies 32-bit embedded cpu"), 1378 ENUM_ENT(EM_FIREPATH, "Element 14 64-bit DSP processor"), 1379 ENUM_ENT(EM_ZSP, "LSI Logic's 16-bit DSP processor"), 1380 ENUM_ENT(EM_MMIX, "Donald Knuth's educational 64-bit processor"), 1381 ENUM_ENT(EM_HUANY, "Harvard Universitys's machine-independent object format"), 1382 ENUM_ENT(EM_PRISM, "Vitesse Prism"), 1383 ENUM_ENT(EM_AVR, "Atmel AVR 8-bit microcontroller"), 1384 ENUM_ENT(EM_FR30, "Fujitsu FR30"), 1385 ENUM_ENT(EM_D10V, "Mitsubishi D10V"), 1386 ENUM_ENT(EM_D30V, "Mitsubishi D30V"), 1387 ENUM_ENT(EM_V850, "NEC v850"), 1388 ENUM_ENT(EM_M32R, "Renesas M32R (formerly Mitsubishi M32r)"), 1389 ENUM_ENT(EM_MN10300, "Matsushita MN10300"), 1390 ENUM_ENT(EM_MN10200, "Matsushita MN10200"), 1391 ENUM_ENT(EM_PJ, "picoJava"), 1392 ENUM_ENT(EM_OPENRISC, "OpenRISC 32-bit embedded processor"), 1393 ENUM_ENT(EM_ARC_COMPACT, "EM_ARC_COMPACT"), 1394 ENUM_ENT(EM_XTENSA, "Tensilica Xtensa Processor"), 1395 ENUM_ENT(EM_VIDEOCORE, "Alphamosaic VideoCore processor"), 1396 ENUM_ENT(EM_TMM_GPP, "Thompson Multimedia General Purpose Processor"), 1397 ENUM_ENT(EM_NS32K, "National Semiconductor 32000 series"), 1398 ENUM_ENT(EM_TPC, "Tenor Network TPC processor"), 1399 ENUM_ENT(EM_SNP1K, "EM_SNP1K"), 1400 ENUM_ENT(EM_ST200, "STMicroelectronics ST200 microcontroller"), 1401 ENUM_ENT(EM_IP2K, "Ubicom IP2xxx 8-bit microcontrollers"), 1402 ENUM_ENT(EM_MAX, "MAX Processor"), 1403 ENUM_ENT(EM_CR, "National Semiconductor CompactRISC"), 1404 ENUM_ENT(EM_F2MC16, "Fujitsu F2MC16"), 1405 ENUM_ENT(EM_MSP430, "Texas Instruments msp430 microcontroller"), 1406 ENUM_ENT(EM_BLACKFIN, "Analog Devices Blackfin"), 1407 ENUM_ENT(EM_SE_C33, "S1C33 Family of Seiko Epson processors"), 1408 ENUM_ENT(EM_SEP, "Sharp embedded microprocessor"), 1409 ENUM_ENT(EM_ARCA, "Arca RISC microprocessor"), 1410 ENUM_ENT(EM_UNICORE, "Unicore"), 1411 ENUM_ENT(EM_EXCESS, "eXcess 16/32/64-bit configurable embedded CPU"), 1412 ENUM_ENT(EM_DXP, "Icera Semiconductor Inc. Deep Execution Processor"), 1413 ENUM_ENT(EM_ALTERA_NIOS2, "Altera Nios"), 1414 ENUM_ENT(EM_CRX, "National Semiconductor CRX microprocessor"), 1415 ENUM_ENT(EM_XGATE, "Motorola XGATE embedded processor"), 1416 ENUM_ENT(EM_C166, "Infineon Technologies xc16x"), 1417 ENUM_ENT(EM_M16C, "Renesas M16C"), 1418 ENUM_ENT(EM_DSPIC30F, "Microchip Technology dsPIC30F Digital Signal Controller"), 1419 ENUM_ENT(EM_CE, "Freescale Communication Engine RISC core"), 1420 ENUM_ENT(EM_M32C, "Renesas M32C"), 1421 ENUM_ENT(EM_TSK3000, "Altium TSK3000 core"), 1422 ENUM_ENT(EM_RS08, "Freescale RS08 embedded processor"), 1423 ENUM_ENT(EM_SHARC, "EM_SHARC"), 1424 ENUM_ENT(EM_ECOG2, "Cyan Technology eCOG2 microprocessor"), 1425 ENUM_ENT(EM_SCORE7, "SUNPLUS S+Core"), 1426 ENUM_ENT(EM_DSP24, "New Japan Radio (NJR) 24-bit DSP Processor"), 1427 ENUM_ENT(EM_VIDEOCORE3, "Broadcom VideoCore III processor"), 1428 ENUM_ENT(EM_LATTICEMICO32, "Lattice Mico32"), 1429 ENUM_ENT(EM_SE_C17, "Seiko Epson C17 family"), 1430 ENUM_ENT(EM_TI_C6000, "Texas Instruments TMS320C6000 DSP family"), 1431 ENUM_ENT(EM_TI_C2000, "Texas Instruments TMS320C2000 DSP family"), 1432 ENUM_ENT(EM_TI_C5500, "Texas Instruments TMS320C55x DSP family"), 1433 ENUM_ENT(EM_MMDSP_PLUS, "STMicroelectronics 64bit VLIW Data Signal Processor"), 1434 ENUM_ENT(EM_CYPRESS_M8C, "Cypress M8C microprocessor"), 1435 ENUM_ENT(EM_R32C, "Renesas R32C series microprocessors"), 1436 ENUM_ENT(EM_TRIMEDIA, "NXP Semiconductors TriMedia architecture family"), 1437 ENUM_ENT(EM_HEXAGON, "Qualcomm Hexagon"), 1438 ENUM_ENT(EM_8051, "Intel 8051 and variants"), 1439 ENUM_ENT(EM_STXP7X, "STMicroelectronics STxP7x family"), 1440 ENUM_ENT(EM_NDS32, "Andes Technology compact code size embedded RISC processor family"), 1441 ENUM_ENT(EM_ECOG1, "Cyan Technology eCOG1 microprocessor"), 1442 // FIXME: Following EM_ECOG1X definitions is dead code since EM_ECOG1X has 1443 // an identical number to EM_ECOG1. 1444 ENUM_ENT(EM_ECOG1X, "Cyan Technology eCOG1X family"), 1445 ENUM_ENT(EM_MAXQ30, "Dallas Semiconductor MAXQ30 Core microcontrollers"), 1446 ENUM_ENT(EM_XIMO16, "New Japan Radio (NJR) 16-bit DSP Processor"), 1447 ENUM_ENT(EM_MANIK, "M2000 Reconfigurable RISC Microprocessor"), 1448 ENUM_ENT(EM_CRAYNV2, "Cray Inc. NV2 vector architecture"), 1449 ENUM_ENT(EM_RX, "Renesas RX"), 1450 ENUM_ENT(EM_METAG, "Imagination Technologies Meta processor architecture"), 1451 ENUM_ENT(EM_MCST_ELBRUS, "MCST Elbrus general purpose hardware architecture"), 1452 ENUM_ENT(EM_ECOG16, "Cyan Technology eCOG16 family"), 1453 ENUM_ENT(EM_CR16, "Xilinx MicroBlaze"), 1454 ENUM_ENT(EM_ETPU, "Freescale Extended Time Processing Unit"), 1455 ENUM_ENT(EM_SLE9X, "Infineon Technologies SLE9X core"), 1456 ENUM_ENT(EM_L10M, "EM_L10M"), 1457 ENUM_ENT(EM_K10M, "EM_K10M"), 1458 ENUM_ENT(EM_AARCH64, "AArch64"), 1459 ENUM_ENT(EM_AVR32, "Atmel Corporation 32-bit microprocessor family"), 1460 ENUM_ENT(EM_STM8, "STMicroeletronics STM8 8-bit microcontroller"), 1461 ENUM_ENT(EM_TILE64, "Tilera TILE64 multicore architecture family"), 1462 ENUM_ENT(EM_TILEPRO, "Tilera TILEPro multicore architecture family"), 1463 ENUM_ENT(EM_CUDA, "NVIDIA CUDA architecture"), 1464 ENUM_ENT(EM_TILEGX, "Tilera TILE-Gx multicore architecture family"), 1465 ENUM_ENT(EM_CLOUDSHIELD, "EM_CLOUDSHIELD"), 1466 ENUM_ENT(EM_COREA_1ST, "EM_COREA_1ST"), 1467 ENUM_ENT(EM_COREA_2ND, "EM_COREA_2ND"), 1468 ENUM_ENT(EM_ARC_COMPACT2, "EM_ARC_COMPACT2"), 1469 ENUM_ENT(EM_OPEN8, "EM_OPEN8"), 1470 ENUM_ENT(EM_RL78, "Renesas RL78"), 1471 ENUM_ENT(EM_VIDEOCORE5, "Broadcom VideoCore V processor"), 1472 ENUM_ENT(EM_78KOR, "EM_78KOR"), 1473 ENUM_ENT(EM_56800EX, "EM_56800EX"), 1474 ENUM_ENT(EM_AMDGPU, "EM_AMDGPU"), 1475 ENUM_ENT(EM_RISCV, "RISC-V"), 1476 ENUM_ENT(EM_LANAI, "EM_LANAI"), 1477 ENUM_ENT(EM_BPF, "EM_BPF"), 1478 ENUM_ENT(EM_VE, "NEC SX-Aurora Vector Engine"), 1479 }; 1480 1481 static const EnumEntry<unsigned> ElfSymbolBindings[] = { 1482 {"Local", "LOCAL", ELF::STB_LOCAL}, 1483 {"Global", "GLOBAL", ELF::STB_GLOBAL}, 1484 {"Weak", "WEAK", ELF::STB_WEAK}, 1485 {"Unique", "UNIQUE", ELF::STB_GNU_UNIQUE}}; 1486 1487 static const EnumEntry<unsigned> ElfSymbolVisibilities[] = { 1488 {"DEFAULT", "DEFAULT", ELF::STV_DEFAULT}, 1489 {"INTERNAL", "INTERNAL", ELF::STV_INTERNAL}, 1490 {"HIDDEN", "HIDDEN", ELF::STV_HIDDEN}, 1491 {"PROTECTED", "PROTECTED", ELF::STV_PROTECTED}}; 1492 1493 static const EnumEntry<unsigned> AMDGPUSymbolTypes[] = { 1494 { "AMDGPU_HSA_KERNEL", ELF::STT_AMDGPU_HSA_KERNEL } 1495 }; 1496 1497 static const char *getGroupType(uint32_t Flag) { 1498 if (Flag & ELF::GRP_COMDAT) 1499 return "COMDAT"; 1500 else 1501 return "(unknown)"; 1502 } 1503 1504 static const EnumEntry<unsigned> ElfSectionFlags[] = { 1505 ENUM_ENT(SHF_WRITE, "W"), 1506 ENUM_ENT(SHF_ALLOC, "A"), 1507 ENUM_ENT(SHF_EXECINSTR, "X"), 1508 ENUM_ENT(SHF_MERGE, "M"), 1509 ENUM_ENT(SHF_STRINGS, "S"), 1510 ENUM_ENT(SHF_INFO_LINK, "I"), 1511 ENUM_ENT(SHF_LINK_ORDER, "L"), 1512 ENUM_ENT(SHF_OS_NONCONFORMING, "O"), 1513 ENUM_ENT(SHF_GROUP, "G"), 1514 ENUM_ENT(SHF_TLS, "T"), 1515 ENUM_ENT(SHF_COMPRESSED, "C"), 1516 ENUM_ENT(SHF_EXCLUDE, "E"), 1517 }; 1518 1519 static const EnumEntry<unsigned> ElfXCoreSectionFlags[] = { 1520 ENUM_ENT(XCORE_SHF_CP_SECTION, ""), 1521 ENUM_ENT(XCORE_SHF_DP_SECTION, "") 1522 }; 1523 1524 static const EnumEntry<unsigned> ElfARMSectionFlags[] = { 1525 ENUM_ENT(SHF_ARM_PURECODE, "y") 1526 }; 1527 1528 static const EnumEntry<unsigned> ElfHexagonSectionFlags[] = { 1529 ENUM_ENT(SHF_HEX_GPREL, "") 1530 }; 1531 1532 static const EnumEntry<unsigned> ElfMipsSectionFlags[] = { 1533 ENUM_ENT(SHF_MIPS_NODUPES, ""), 1534 ENUM_ENT(SHF_MIPS_NAMES, ""), 1535 ENUM_ENT(SHF_MIPS_LOCAL, ""), 1536 ENUM_ENT(SHF_MIPS_NOSTRIP, ""), 1537 ENUM_ENT(SHF_MIPS_GPREL, ""), 1538 ENUM_ENT(SHF_MIPS_MERGE, ""), 1539 ENUM_ENT(SHF_MIPS_ADDR, ""), 1540 ENUM_ENT(SHF_MIPS_STRING, "") 1541 }; 1542 1543 static const EnumEntry<unsigned> ElfX86_64SectionFlags[] = { 1544 ENUM_ENT(SHF_X86_64_LARGE, "l") 1545 }; 1546 1547 static std::vector<EnumEntry<unsigned>> 1548 getSectionFlagsForTarget(unsigned EMachine) { 1549 std::vector<EnumEntry<unsigned>> Ret(std::begin(ElfSectionFlags), 1550 std::end(ElfSectionFlags)); 1551 switch (EMachine) { 1552 case EM_ARM: 1553 Ret.insert(Ret.end(), std::begin(ElfARMSectionFlags), 1554 std::end(ElfARMSectionFlags)); 1555 break; 1556 case EM_HEXAGON: 1557 Ret.insert(Ret.end(), std::begin(ElfHexagonSectionFlags), 1558 std::end(ElfHexagonSectionFlags)); 1559 break; 1560 case EM_MIPS: 1561 Ret.insert(Ret.end(), std::begin(ElfMipsSectionFlags), 1562 std::end(ElfMipsSectionFlags)); 1563 break; 1564 case EM_X86_64: 1565 Ret.insert(Ret.end(), std::begin(ElfX86_64SectionFlags), 1566 std::end(ElfX86_64SectionFlags)); 1567 break; 1568 case EM_XCORE: 1569 Ret.insert(Ret.end(), std::begin(ElfXCoreSectionFlags), 1570 std::end(ElfXCoreSectionFlags)); 1571 break; 1572 default: 1573 break; 1574 } 1575 return Ret; 1576 } 1577 1578 static std::string getGNUFlags(unsigned EMachine, uint64_t Flags) { 1579 // Here we are trying to build the flags string in the same way as GNU does. 1580 // It is not that straightforward. Imagine we have sh_flags == 0x90000000. 1581 // SHF_EXCLUDE ("E") has a value of 0x80000000 and SHF_MASKPROC is 0xf0000000. 1582 // GNU readelf will not print "E" or "Ep" in this case, but will print just 1583 // "p". It only will print "E" when no other processor flag is set. 1584 std::string Str; 1585 bool HasUnknownFlag = false; 1586 bool HasOSFlag = false; 1587 bool HasProcFlag = false; 1588 std::vector<EnumEntry<unsigned>> FlagsList = 1589 getSectionFlagsForTarget(EMachine); 1590 while (Flags) { 1591 // Take the least significant bit as a flag. 1592 uint64_t Flag = Flags & -Flags; 1593 Flags -= Flag; 1594 1595 // Find the flag in the known flags list. 1596 auto I = llvm::find_if(FlagsList, [=](const EnumEntry<unsigned> &E) { 1597 // Flags with empty names are not printed in GNU style output. 1598 return E.Value == Flag && !E.AltName.empty(); 1599 }); 1600 if (I != FlagsList.end()) { 1601 Str += I->AltName; 1602 continue; 1603 } 1604 1605 // If we did not find a matching regular flag, then we deal with an OS 1606 // specific flag, processor specific flag or an unknown flag. 1607 if (Flag & ELF::SHF_MASKOS) { 1608 HasOSFlag = true; 1609 Flags &= ~ELF::SHF_MASKOS; 1610 } else if (Flag & ELF::SHF_MASKPROC) { 1611 HasProcFlag = true; 1612 // Mask off all the processor-specific bits. This removes the SHF_EXCLUDE 1613 // bit if set so that it doesn't also get printed. 1614 Flags &= ~ELF::SHF_MASKPROC; 1615 } else { 1616 HasUnknownFlag = true; 1617 } 1618 } 1619 1620 // "o", "p" and "x" are printed last. 1621 if (HasOSFlag) 1622 Str += "o"; 1623 if (HasProcFlag) 1624 Str += "p"; 1625 if (HasUnknownFlag) 1626 Str += "x"; 1627 return Str; 1628 } 1629 1630 static const char *getElfSegmentType(unsigned Arch, unsigned Type) { 1631 // Check potentially overlapped processor-specific 1632 // program header type. 1633 switch (Arch) { 1634 case ELF::EM_ARM: 1635 switch (Type) { LLVM_READOBJ_ENUM_CASE(ELF, PT_ARM_EXIDX); } 1636 break; 1637 case ELF::EM_MIPS: 1638 case ELF::EM_MIPS_RS3_LE: 1639 switch (Type) { 1640 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_REGINFO); 1641 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_RTPROC); 1642 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_OPTIONS); 1643 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_ABIFLAGS); 1644 } 1645 break; 1646 } 1647 1648 switch (Type) { 1649 LLVM_READOBJ_ENUM_CASE(ELF, PT_NULL ); 1650 LLVM_READOBJ_ENUM_CASE(ELF, PT_LOAD ); 1651 LLVM_READOBJ_ENUM_CASE(ELF, PT_DYNAMIC); 1652 LLVM_READOBJ_ENUM_CASE(ELF, PT_INTERP ); 1653 LLVM_READOBJ_ENUM_CASE(ELF, PT_NOTE ); 1654 LLVM_READOBJ_ENUM_CASE(ELF, PT_SHLIB ); 1655 LLVM_READOBJ_ENUM_CASE(ELF, PT_PHDR ); 1656 LLVM_READOBJ_ENUM_CASE(ELF, PT_TLS ); 1657 1658 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_EH_FRAME); 1659 LLVM_READOBJ_ENUM_CASE(ELF, PT_SUNW_UNWIND); 1660 1661 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_STACK); 1662 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_RELRO); 1663 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_PROPERTY); 1664 1665 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_RANDOMIZE); 1666 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_WXNEEDED); 1667 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_BOOTDATA); 1668 1669 default: 1670 return ""; 1671 } 1672 } 1673 1674 static std::string getElfPtType(unsigned Arch, unsigned Type) { 1675 switch (Type) { 1676 LLVM_READOBJ_PHDR_ENUM(ELF, PT_NULL) 1677 LLVM_READOBJ_PHDR_ENUM(ELF, PT_LOAD) 1678 LLVM_READOBJ_PHDR_ENUM(ELF, PT_DYNAMIC) 1679 LLVM_READOBJ_PHDR_ENUM(ELF, PT_INTERP) 1680 LLVM_READOBJ_PHDR_ENUM(ELF, PT_NOTE) 1681 LLVM_READOBJ_PHDR_ENUM(ELF, PT_SHLIB) 1682 LLVM_READOBJ_PHDR_ENUM(ELF, PT_PHDR) 1683 LLVM_READOBJ_PHDR_ENUM(ELF, PT_TLS) 1684 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_EH_FRAME) 1685 LLVM_READOBJ_PHDR_ENUM(ELF, PT_SUNW_UNWIND) 1686 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_STACK) 1687 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_RELRO) 1688 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_PROPERTY) 1689 default: 1690 // All machine specific PT_* types 1691 switch (Arch) { 1692 case ELF::EM_ARM: 1693 if (Type == ELF::PT_ARM_EXIDX) 1694 return "EXIDX"; 1695 break; 1696 case ELF::EM_MIPS: 1697 case ELF::EM_MIPS_RS3_LE: 1698 switch (Type) { 1699 case PT_MIPS_REGINFO: 1700 return "REGINFO"; 1701 case PT_MIPS_RTPROC: 1702 return "RTPROC"; 1703 case PT_MIPS_OPTIONS: 1704 return "OPTIONS"; 1705 case PT_MIPS_ABIFLAGS: 1706 return "ABIFLAGS"; 1707 } 1708 break; 1709 } 1710 } 1711 return std::string("<unknown>: ") + to_string(format_hex(Type, 1)); 1712 } 1713 1714 static const EnumEntry<unsigned> ElfSegmentFlags[] = { 1715 LLVM_READOBJ_ENUM_ENT(ELF, PF_X), 1716 LLVM_READOBJ_ENUM_ENT(ELF, PF_W), 1717 LLVM_READOBJ_ENUM_ENT(ELF, PF_R) 1718 }; 1719 1720 static const EnumEntry<unsigned> ElfHeaderMipsFlags[] = { 1721 ENUM_ENT(EF_MIPS_NOREORDER, "noreorder"), 1722 ENUM_ENT(EF_MIPS_PIC, "pic"), 1723 ENUM_ENT(EF_MIPS_CPIC, "cpic"), 1724 ENUM_ENT(EF_MIPS_ABI2, "abi2"), 1725 ENUM_ENT(EF_MIPS_32BITMODE, "32bitmode"), 1726 ENUM_ENT(EF_MIPS_FP64, "fp64"), 1727 ENUM_ENT(EF_MIPS_NAN2008, "nan2008"), 1728 ENUM_ENT(EF_MIPS_ABI_O32, "o32"), 1729 ENUM_ENT(EF_MIPS_ABI_O64, "o64"), 1730 ENUM_ENT(EF_MIPS_ABI_EABI32, "eabi32"), 1731 ENUM_ENT(EF_MIPS_ABI_EABI64, "eabi64"), 1732 ENUM_ENT(EF_MIPS_MACH_3900, "3900"), 1733 ENUM_ENT(EF_MIPS_MACH_4010, "4010"), 1734 ENUM_ENT(EF_MIPS_MACH_4100, "4100"), 1735 ENUM_ENT(EF_MIPS_MACH_4650, "4650"), 1736 ENUM_ENT(EF_MIPS_MACH_4120, "4120"), 1737 ENUM_ENT(EF_MIPS_MACH_4111, "4111"), 1738 ENUM_ENT(EF_MIPS_MACH_SB1, "sb1"), 1739 ENUM_ENT(EF_MIPS_MACH_OCTEON, "octeon"), 1740 ENUM_ENT(EF_MIPS_MACH_XLR, "xlr"), 1741 ENUM_ENT(EF_MIPS_MACH_OCTEON2, "octeon2"), 1742 ENUM_ENT(EF_MIPS_MACH_OCTEON3, "octeon3"), 1743 ENUM_ENT(EF_MIPS_MACH_5400, "5400"), 1744 ENUM_ENT(EF_MIPS_MACH_5900, "5900"), 1745 ENUM_ENT(EF_MIPS_MACH_5500, "5500"), 1746 ENUM_ENT(EF_MIPS_MACH_9000, "9000"), 1747 ENUM_ENT(EF_MIPS_MACH_LS2E, "loongson-2e"), 1748 ENUM_ENT(EF_MIPS_MACH_LS2F, "loongson-2f"), 1749 ENUM_ENT(EF_MIPS_MACH_LS3A, "loongson-3a"), 1750 ENUM_ENT(EF_MIPS_MICROMIPS, "micromips"), 1751 ENUM_ENT(EF_MIPS_ARCH_ASE_M16, "mips16"), 1752 ENUM_ENT(EF_MIPS_ARCH_ASE_MDMX, "mdmx"), 1753 ENUM_ENT(EF_MIPS_ARCH_1, "mips1"), 1754 ENUM_ENT(EF_MIPS_ARCH_2, "mips2"), 1755 ENUM_ENT(EF_MIPS_ARCH_3, "mips3"), 1756 ENUM_ENT(EF_MIPS_ARCH_4, "mips4"), 1757 ENUM_ENT(EF_MIPS_ARCH_5, "mips5"), 1758 ENUM_ENT(EF_MIPS_ARCH_32, "mips32"), 1759 ENUM_ENT(EF_MIPS_ARCH_64, "mips64"), 1760 ENUM_ENT(EF_MIPS_ARCH_32R2, "mips32r2"), 1761 ENUM_ENT(EF_MIPS_ARCH_64R2, "mips64r2"), 1762 ENUM_ENT(EF_MIPS_ARCH_32R6, "mips32r6"), 1763 ENUM_ENT(EF_MIPS_ARCH_64R6, "mips64r6") 1764 }; 1765 1766 static const EnumEntry<unsigned> ElfHeaderAMDGPUFlags[] = { 1767 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_NONE), 1768 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R600), 1769 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R630), 1770 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RS880), 1771 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV670), 1772 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV710), 1773 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV730), 1774 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV770), 1775 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CEDAR), 1776 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CYPRESS), 1777 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_JUNIPER), 1778 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_REDWOOD), 1779 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_SUMO), 1780 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_BARTS), 1781 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAICOS), 1782 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAYMAN), 1783 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_TURKS), 1784 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX600), 1785 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX601), 1786 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX700), 1787 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX701), 1788 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX702), 1789 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX703), 1790 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX704), 1791 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX801), 1792 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX802), 1793 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX803), 1794 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX810), 1795 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX900), 1796 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX902), 1797 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX904), 1798 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX906), 1799 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX908), 1800 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX909), 1801 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1010), 1802 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1011), 1803 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1012), 1804 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1030), 1805 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_XNACK), 1806 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_SRAM_ECC) 1807 }; 1808 1809 static const EnumEntry<unsigned> ElfHeaderRISCVFlags[] = { 1810 ENUM_ENT(EF_RISCV_RVC, "RVC"), 1811 ENUM_ENT(EF_RISCV_FLOAT_ABI_SINGLE, "single-float ABI"), 1812 ENUM_ENT(EF_RISCV_FLOAT_ABI_DOUBLE, "double-float ABI"), 1813 ENUM_ENT(EF_RISCV_FLOAT_ABI_QUAD, "quad-float ABI"), 1814 ENUM_ENT(EF_RISCV_RVE, "RVE") 1815 }; 1816 1817 static const EnumEntry<unsigned> ElfSymOtherFlags[] = { 1818 LLVM_READOBJ_ENUM_ENT(ELF, STV_INTERNAL), 1819 LLVM_READOBJ_ENUM_ENT(ELF, STV_HIDDEN), 1820 LLVM_READOBJ_ENUM_ENT(ELF, STV_PROTECTED) 1821 }; 1822 1823 static const EnumEntry<unsigned> ElfMipsSymOtherFlags[] = { 1824 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1825 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1826 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PIC), 1827 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MICROMIPS) 1828 }; 1829 1830 static const EnumEntry<unsigned> ElfMips16SymOtherFlags[] = { 1831 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1832 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1833 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MIPS16) 1834 }; 1835 1836 static const char *getElfMipsOptionsOdkType(unsigned Odk) { 1837 switch (Odk) { 1838 LLVM_READOBJ_ENUM_CASE(ELF, ODK_NULL); 1839 LLVM_READOBJ_ENUM_CASE(ELF, ODK_REGINFO); 1840 LLVM_READOBJ_ENUM_CASE(ELF, ODK_EXCEPTIONS); 1841 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAD); 1842 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWPATCH); 1843 LLVM_READOBJ_ENUM_CASE(ELF, ODK_FILL); 1844 LLVM_READOBJ_ENUM_CASE(ELF, ODK_TAGS); 1845 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWAND); 1846 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWOR); 1847 LLVM_READOBJ_ENUM_CASE(ELF, ODK_GP_GROUP); 1848 LLVM_READOBJ_ENUM_CASE(ELF, ODK_IDENT); 1849 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAGESIZE); 1850 default: 1851 return "Unknown"; 1852 } 1853 } 1854 1855 template <typename ELFT> 1856 std::pair<const typename ELFT::Phdr *, const typename ELFT::Shdr *> 1857 ELFDumper<ELFT>::findDynamic(const ELFFile<ELFT> *Obj) { 1858 // Try to locate the PT_DYNAMIC header. 1859 const Elf_Phdr *DynamicPhdr = nullptr; 1860 for (const Elf_Phdr &Phdr : 1861 unwrapOrError(ObjF->getFileName(), Obj->program_headers())) { 1862 if (Phdr.p_type != ELF::PT_DYNAMIC) 1863 continue; 1864 DynamicPhdr = &Phdr; 1865 break; 1866 } 1867 1868 // Try to locate the .dynamic section in the sections header table. 1869 const Elf_Shdr *DynamicSec = nullptr; 1870 for (const Elf_Shdr &Sec : 1871 unwrapOrError(ObjF->getFileName(), Obj->sections())) { 1872 if (Sec.sh_type != ELF::SHT_DYNAMIC) 1873 continue; 1874 DynamicSec = &Sec; 1875 break; 1876 } 1877 1878 if (DynamicPhdr && DynamicPhdr->p_offset + DynamicPhdr->p_filesz > 1879 ObjF->getMemoryBufferRef().getBufferSize()) { 1880 reportWarning( 1881 createError( 1882 "PT_DYNAMIC segment offset + size exceeds the size of the file"), 1883 ObjF->getFileName()); 1884 // Don't use the broken dynamic header. 1885 DynamicPhdr = nullptr; 1886 } 1887 1888 if (DynamicPhdr && DynamicSec) { 1889 StringRef Name = 1890 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DynamicSec)); 1891 if (DynamicSec->sh_addr + DynamicSec->sh_size > 1892 DynamicPhdr->p_vaddr + DynamicPhdr->p_memsz || 1893 DynamicSec->sh_addr < DynamicPhdr->p_vaddr) 1894 reportWarning(createError("The SHT_DYNAMIC section '" + Name + 1895 "' is not contained within the " 1896 "PT_DYNAMIC segment"), 1897 ObjF->getFileName()); 1898 1899 if (DynamicSec->sh_addr != DynamicPhdr->p_vaddr) 1900 reportWarning(createError("The SHT_DYNAMIC section '" + Name + 1901 "' is not at the start of " 1902 "PT_DYNAMIC segment"), 1903 ObjF->getFileName()); 1904 } 1905 1906 return std::make_pair(DynamicPhdr, DynamicSec); 1907 } 1908 1909 template <typename ELFT> 1910 void ELFDumper<ELFT>::loadDynamicTable(const ELFFile<ELFT> *Obj) { 1911 const Elf_Phdr *DynamicPhdr; 1912 const Elf_Shdr *DynamicSec; 1913 std::tie(DynamicPhdr, DynamicSec) = findDynamic(Obj); 1914 if (!DynamicPhdr && !DynamicSec) 1915 return; 1916 1917 DynRegionInfo FromPhdr(ObjF->getFileName()); 1918 bool IsPhdrTableValid = false; 1919 if (DynamicPhdr) { 1920 FromPhdr = createDRIFrom(DynamicPhdr, sizeof(Elf_Dyn)); 1921 FromPhdr.SizePrintName = "PT_DYNAMIC size"; 1922 FromPhdr.EntSizePrintName = ""; 1923 1924 IsPhdrTableValid = !FromPhdr.getAsArrayRef<Elf_Dyn>().empty(); 1925 } 1926 1927 // Locate the dynamic table described in a section header. 1928 // Ignore sh_entsize and use the expected value for entry size explicitly. 1929 // This allows us to dump dynamic sections with a broken sh_entsize 1930 // field. 1931 DynRegionInfo FromSec(ObjF->getFileName()); 1932 bool IsSecTableValid = false; 1933 if (DynamicSec) { 1934 FromSec = 1935 checkDRI({ObjF->getELFFile()->base() + DynamicSec->sh_offset, 1936 DynamicSec->sh_size, sizeof(Elf_Dyn), ObjF->getFileName()}); 1937 FromSec.Context = ("section with index " + 1938 Twine(DynamicSec - &cantFail(Obj->sections()).front())) 1939 .str(); 1940 FromSec.EntSizePrintName = ""; 1941 1942 IsSecTableValid = !FromSec.getAsArrayRef<Elf_Dyn>().empty(); 1943 } 1944 1945 // When we only have information from one of the SHT_DYNAMIC section header or 1946 // PT_DYNAMIC program header, just use that. 1947 if (!DynamicPhdr || !DynamicSec) { 1948 if ((DynamicPhdr && IsPhdrTableValid) || (DynamicSec && IsSecTableValid)) { 1949 DynamicTable = DynamicPhdr ? FromPhdr : FromSec; 1950 parseDynamicTable(Obj); 1951 } else { 1952 reportWarning(createError("no valid dynamic table was found"), 1953 ObjF->getFileName()); 1954 } 1955 return; 1956 } 1957 1958 // At this point we have tables found from the section header and from the 1959 // dynamic segment. Usually they match, but we have to do sanity checks to 1960 // verify that. 1961 1962 if (FromPhdr.Addr != FromSec.Addr) 1963 reportWarning(createError("SHT_DYNAMIC section header and PT_DYNAMIC " 1964 "program header disagree about " 1965 "the location of the dynamic table"), 1966 ObjF->getFileName()); 1967 1968 if (!IsPhdrTableValid && !IsSecTableValid) { 1969 reportWarning(createError("no valid dynamic table was found"), 1970 ObjF->getFileName()); 1971 return; 1972 } 1973 1974 // Information in the PT_DYNAMIC program header has priority over the information 1975 // in a section header. 1976 if (IsPhdrTableValid) { 1977 if (!IsSecTableValid) 1978 reportWarning( 1979 createError( 1980 "SHT_DYNAMIC dynamic table is invalid: PT_DYNAMIC will be used"), 1981 ObjF->getFileName()); 1982 DynamicTable = FromPhdr; 1983 } else { 1984 reportWarning( 1985 createError( 1986 "PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used"), 1987 ObjF->getFileName()); 1988 DynamicTable = FromSec; 1989 } 1990 1991 parseDynamicTable(Obj); 1992 } 1993 1994 template <typename ELFT> 1995 ELFDumper<ELFT>::ELFDumper(const object::ELFObjectFile<ELFT> *ObjF, 1996 ScopedPrinter &Writer) 1997 : ObjDumper(Writer), ObjF(ObjF), DynRelRegion(ObjF->getFileName()), 1998 DynRelaRegion(ObjF->getFileName()), DynRelrRegion(ObjF->getFileName()), 1999 DynPLTRelRegion(ObjF->getFileName()), DynamicTable(ObjF->getFileName()) { 2000 // Dumper reports all non-critical errors as warnings. 2001 // It does not print the same warning more than once. 2002 WarningHandler = [this](const Twine &Msg) { 2003 if (Warnings.insert(Msg.str()).second) 2004 reportWarning(createError(Msg), this->ObjF->getFileName()); 2005 return Error::success(); 2006 }; 2007 2008 if (opts::Output == opts::GNU) 2009 ELFDumperStyle.reset(new GNUStyle<ELFT>(Writer, this)); 2010 else 2011 ELFDumperStyle.reset(new LLVMStyle<ELFT>(Writer, this)); 2012 2013 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2014 typename ELFT::ShdrRange Sections = 2015 unwrapOrError(ObjF->getFileName(), Obj->sections()); 2016 for (const Elf_Shdr &Sec : Sections) { 2017 switch (Sec.sh_type) { 2018 case ELF::SHT_SYMTAB: 2019 if (!DotSymtabSec) 2020 DotSymtabSec = &Sec; 2021 break; 2022 case ELF::SHT_DYNSYM: 2023 if (!DynSymRegion) { 2024 DynSymRegion = createDRIFrom(&Sec); 2025 DynSymRegion->Context = 2026 ("section with index " + Twine(&Sec - &Sections.front())).str(); 2027 // This is only used (if Elf_Shdr present)for naming section in GNU 2028 // style 2029 DynSymtabName = 2030 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec)); 2031 2032 if (Expected<StringRef> E = Obj->getStringTableForSymtab(Sec)) 2033 DynamicStringTable = *E; 2034 else 2035 reportWarning(E.takeError(), ObjF->getFileName()); 2036 } 2037 break; 2038 case ELF::SHT_SYMTAB_SHNDX: 2039 ShndxTable = unwrapOrError(ObjF->getFileName(), Obj->getSHNDXTable(Sec)); 2040 break; 2041 case ELF::SHT_GNU_versym: 2042 if (!SymbolVersionSection) 2043 SymbolVersionSection = &Sec; 2044 break; 2045 case ELF::SHT_GNU_verdef: 2046 if (!SymbolVersionDefSection) 2047 SymbolVersionDefSection = &Sec; 2048 break; 2049 case ELF::SHT_GNU_verneed: 2050 if (!SymbolVersionNeedSection) 2051 SymbolVersionNeedSection = &Sec; 2052 break; 2053 case ELF::SHT_LLVM_CALL_GRAPH_PROFILE: 2054 if (!DotCGProfileSec) 2055 DotCGProfileSec = &Sec; 2056 break; 2057 case ELF::SHT_LLVM_ADDRSIG: 2058 if (!DotAddrsigSec) 2059 DotAddrsigSec = &Sec; 2060 break; 2061 } 2062 } 2063 2064 loadDynamicTable(Obj); 2065 } 2066 2067 template <typename ELFT> 2068 void ELFDumper<ELFT>::parseDynamicTable(const ELFFile<ELFT> *Obj) { 2069 auto toMappedAddr = [&](uint64_t Tag, uint64_t VAddr) -> const uint8_t * { 2070 auto MappedAddrOrError = ObjF->getELFFile()->toMappedAddr(VAddr); 2071 if (!MappedAddrOrError) { 2072 Error Err = 2073 createError("Unable to parse DT_" + Obj->getDynamicTagAsString(Tag) + 2074 ": " + llvm::toString(MappedAddrOrError.takeError())); 2075 2076 reportWarning(std::move(Err), ObjF->getFileName()); 2077 return nullptr; 2078 } 2079 return MappedAddrOrError.get(); 2080 }; 2081 2082 uint64_t SONameOffset = 0; 2083 const char *StringTableBegin = nullptr; 2084 uint64_t StringTableSize = 0; 2085 Optional<DynRegionInfo> DynSymFromTable; 2086 for (const Elf_Dyn &Dyn : dynamic_table()) { 2087 switch (Dyn.d_tag) { 2088 case ELF::DT_HASH: 2089 HashTable = reinterpret_cast<const Elf_Hash *>( 2090 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2091 break; 2092 case ELF::DT_GNU_HASH: 2093 GnuHashTable = reinterpret_cast<const Elf_GnuHash *>( 2094 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2095 break; 2096 case ELF::DT_STRTAB: 2097 StringTableBegin = reinterpret_cast<const char *>( 2098 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2099 break; 2100 case ELF::DT_STRSZ: 2101 StringTableSize = Dyn.getVal(); 2102 break; 2103 case ELF::DT_SYMTAB: { 2104 // If we can't map the DT_SYMTAB value to an address (e.g. when there are 2105 // no program headers), we ignore its value. 2106 if (const uint8_t *VA = toMappedAddr(Dyn.getTag(), Dyn.getPtr())) { 2107 DynSymFromTable.emplace(ObjF->getFileName()); 2108 DynSymFromTable->Addr = VA; 2109 DynSymFromTable->EntSize = sizeof(Elf_Sym); 2110 DynSymFromTable->EntSizePrintName = ""; 2111 } 2112 break; 2113 } 2114 case ELF::DT_SYMENT: { 2115 uint64_t Val = Dyn.getVal(); 2116 if (Val != sizeof(Elf_Sym)) 2117 reportWarning(createError("DT_SYMENT value of 0x" + 2118 Twine::utohexstr(Val) + 2119 " is not the size of a symbol (0x" + 2120 Twine::utohexstr(sizeof(Elf_Sym)) + ")"), 2121 ObjF->getFileName()); 2122 break; 2123 } 2124 case ELF::DT_RELA: 2125 DynRelaRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2126 break; 2127 case ELF::DT_RELASZ: 2128 DynRelaRegion.Size = Dyn.getVal(); 2129 DynRelaRegion.SizePrintName = "DT_RELASZ value"; 2130 break; 2131 case ELF::DT_RELAENT: 2132 DynRelaRegion.EntSize = Dyn.getVal(); 2133 DynRelaRegion.EntSizePrintName = "DT_RELAENT value"; 2134 break; 2135 case ELF::DT_SONAME: 2136 SONameOffset = Dyn.getVal(); 2137 break; 2138 case ELF::DT_REL: 2139 DynRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2140 break; 2141 case ELF::DT_RELSZ: 2142 DynRelRegion.Size = Dyn.getVal(); 2143 DynRelRegion.SizePrintName = "DT_RELSZ value"; 2144 break; 2145 case ELF::DT_RELENT: 2146 DynRelRegion.EntSize = Dyn.getVal(); 2147 DynRelRegion.EntSizePrintName = "DT_RELENT value"; 2148 break; 2149 case ELF::DT_RELR: 2150 case ELF::DT_ANDROID_RELR: 2151 DynRelrRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2152 break; 2153 case ELF::DT_RELRSZ: 2154 case ELF::DT_ANDROID_RELRSZ: 2155 DynRelrRegion.Size = Dyn.getVal(); 2156 DynRelrRegion.SizePrintName = Dyn.d_tag == ELF::DT_RELRSZ 2157 ? "DT_RELRSZ value" 2158 : "DT_ANDROID_RELRSZ value"; 2159 break; 2160 case ELF::DT_RELRENT: 2161 case ELF::DT_ANDROID_RELRENT: 2162 DynRelrRegion.EntSize = Dyn.getVal(); 2163 DynRelrRegion.EntSizePrintName = Dyn.d_tag == ELF::DT_RELRENT 2164 ? "DT_RELRENT value" 2165 : "DT_ANDROID_RELRENT value"; 2166 break; 2167 case ELF::DT_PLTREL: 2168 if (Dyn.getVal() == DT_REL) 2169 DynPLTRelRegion.EntSize = sizeof(Elf_Rel); 2170 else if (Dyn.getVal() == DT_RELA) 2171 DynPLTRelRegion.EntSize = sizeof(Elf_Rela); 2172 else 2173 reportError(createError(Twine("unknown DT_PLTREL value of ") + 2174 Twine((uint64_t)Dyn.getVal())), 2175 ObjF->getFileName()); 2176 DynPLTRelRegion.EntSizePrintName = ""; 2177 break; 2178 case ELF::DT_JMPREL: 2179 DynPLTRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2180 break; 2181 case ELF::DT_PLTRELSZ: 2182 DynPLTRelRegion.Size = Dyn.getVal(); 2183 DynPLTRelRegion.SizePrintName = "DT_PLTRELSZ value"; 2184 break; 2185 } 2186 } 2187 2188 if (StringTableBegin) { 2189 const uint64_t FileSize = ObjF->getELFFile()->getBufSize(); 2190 const uint64_t Offset = 2191 (const uint8_t *)StringTableBegin - ObjF->getELFFile()->base(); 2192 if (StringTableSize > FileSize - Offset) 2193 reportUniqueWarning(createError( 2194 "the dynamic string table at 0x" + Twine::utohexstr(Offset) + 2195 " goes past the end of the file (0x" + Twine::utohexstr(FileSize) + 2196 ") with DT_STRSZ = 0x" + Twine::utohexstr(StringTableSize))); 2197 else 2198 DynamicStringTable = StringRef(StringTableBegin, StringTableSize); 2199 } 2200 2201 SOName = getDynamicString(SONameOffset); 2202 2203 if (DynSymRegion) { 2204 // Often we find the information about the dynamic symbol table 2205 // location in the SHT_DYNSYM section header. However, the value in 2206 // DT_SYMTAB has priority, because it is used by dynamic loaders to 2207 // locate .dynsym at runtime. The location we find in the section header 2208 // and the location we find here should match. 2209 if (DynSymFromTable && DynSymFromTable->Addr != DynSymRegion->Addr) 2210 reportUniqueWarning( 2211 createError("SHT_DYNSYM section header and DT_SYMTAB disagree about " 2212 "the location of the dynamic symbol table")); 2213 2214 // According to the ELF gABI: "The number of symbol table entries should 2215 // equal nchain". Check to see if the DT_HASH hash table nchain value 2216 // conflicts with the number of symbols in the dynamic symbol table 2217 // according to the section header. 2218 if (HashTable && 2219 HashTable->nchain != DynSymRegion->Size / DynSymRegion->EntSize) 2220 reportUniqueWarning(createError( 2221 "hash table nchain (" + Twine(HashTable->nchain) + 2222 ") differs from symbol count derived from SHT_DYNSYM section " 2223 "header (" + 2224 Twine(DynSymRegion->Size / DynSymRegion->EntSize) + ")")); 2225 } 2226 2227 // Delay the creation of the actual dynamic symbol table until now, so that 2228 // checks can always be made against the section header-based properties, 2229 // without worrying about tag order. 2230 if (DynSymFromTable) { 2231 if (!DynSymRegion) { 2232 DynSymRegion = DynSymFromTable; 2233 } else { 2234 DynSymRegion->Addr = DynSymFromTable->Addr; 2235 DynSymRegion->EntSize = DynSymFromTable->EntSize; 2236 DynSymRegion->EntSizePrintName = DynSymFromTable->EntSizePrintName; 2237 } 2238 } 2239 2240 // Derive the dynamic symbol table size from the DT_HASH hash table, if 2241 // present. 2242 if (HashTable && DynSymRegion) 2243 DynSymRegion->Size = HashTable->nchain * DynSymRegion->EntSize; 2244 } 2245 2246 template <typename ELFT> 2247 typename ELFDumper<ELFT>::Elf_Rel_Range ELFDumper<ELFT>::dyn_rels() const { 2248 return DynRelRegion.getAsArrayRef<Elf_Rel>(); 2249 } 2250 2251 template <typename ELFT> 2252 typename ELFDumper<ELFT>::Elf_Rela_Range ELFDumper<ELFT>::dyn_relas() const { 2253 return DynRelaRegion.getAsArrayRef<Elf_Rela>(); 2254 } 2255 2256 template <typename ELFT> 2257 typename ELFDumper<ELFT>::Elf_Relr_Range ELFDumper<ELFT>::dyn_relrs() const { 2258 return DynRelrRegion.getAsArrayRef<Elf_Relr>(); 2259 } 2260 2261 template <class ELFT> void ELFDumper<ELFT>::printFileHeaders() { 2262 ELFDumperStyle->printFileHeaders(ObjF->getELFFile()); 2263 } 2264 2265 template <class ELFT> void ELFDumper<ELFT>::printSectionHeaders() { 2266 ELFDumperStyle->printSectionHeaders(ObjF->getELFFile()); 2267 } 2268 2269 template <class ELFT> void ELFDumper<ELFT>::printRelocations() { 2270 ELFDumperStyle->printRelocations(ObjF->getELFFile()); 2271 } 2272 2273 template <class ELFT> 2274 void ELFDumper<ELFT>::printProgramHeaders( 2275 bool PrintProgramHeaders, cl::boolOrDefault PrintSectionMapping) { 2276 ELFDumperStyle->printProgramHeaders(ObjF->getELFFile(), PrintProgramHeaders, 2277 PrintSectionMapping); 2278 } 2279 2280 template <typename ELFT> void ELFDumper<ELFT>::printVersionInfo() { 2281 // Dump version symbol section. 2282 ELFDumperStyle->printVersionSymbolSection(ObjF->getELFFile(), 2283 SymbolVersionSection); 2284 2285 // Dump version definition section. 2286 ELFDumperStyle->printVersionDefinitionSection(ObjF->getELFFile(), 2287 SymbolVersionDefSection); 2288 2289 // Dump version dependency section. 2290 ELFDumperStyle->printVersionDependencySection(ObjF->getELFFile(), 2291 SymbolVersionNeedSection); 2292 } 2293 2294 template <class ELFT> void ELFDumper<ELFT>::printDependentLibs() { 2295 ELFDumperStyle->printDependentLibs(ObjF->getELFFile()); 2296 } 2297 2298 template <class ELFT> void ELFDumper<ELFT>::printDynamicRelocations() { 2299 ELFDumperStyle->printDynamicRelocations(ObjF->getELFFile()); 2300 } 2301 2302 template <class ELFT> 2303 void ELFDumper<ELFT>::printSymbols(bool PrintSymbols, 2304 bool PrintDynamicSymbols) { 2305 ELFDumperStyle->printSymbols(ObjF->getELFFile(), PrintSymbols, 2306 PrintDynamicSymbols); 2307 } 2308 2309 template <class ELFT> void ELFDumper<ELFT>::printHashSymbols() { 2310 ELFDumperStyle->printHashSymbols(ObjF->getELFFile()); 2311 } 2312 2313 template <class ELFT> void ELFDumper<ELFT>::printHashHistograms() { 2314 ELFDumperStyle->printHashHistograms(ObjF->getELFFile()); 2315 } 2316 2317 template <class ELFT> void ELFDumper<ELFT>::printCGProfile() { 2318 ELFDumperStyle->printCGProfile(ObjF->getELFFile()); 2319 } 2320 2321 template <class ELFT> void ELFDumper<ELFT>::printNotes() { 2322 ELFDumperStyle->printNotes(ObjF->getELFFile()); 2323 } 2324 2325 template <class ELFT> void ELFDumper<ELFT>::printELFLinkerOptions() { 2326 ELFDumperStyle->printELFLinkerOptions(ObjF->getELFFile()); 2327 } 2328 2329 template <class ELFT> void ELFDumper<ELFT>::printStackSizes() { 2330 ELFDumperStyle->printStackSizes(ObjF); 2331 } 2332 2333 #define LLVM_READOBJ_DT_FLAG_ENT(prefix, enum) \ 2334 { #enum, prefix##_##enum } 2335 2336 static const EnumEntry<unsigned> ElfDynamicDTFlags[] = { 2337 LLVM_READOBJ_DT_FLAG_ENT(DF, ORIGIN), 2338 LLVM_READOBJ_DT_FLAG_ENT(DF, SYMBOLIC), 2339 LLVM_READOBJ_DT_FLAG_ENT(DF, TEXTREL), 2340 LLVM_READOBJ_DT_FLAG_ENT(DF, BIND_NOW), 2341 LLVM_READOBJ_DT_FLAG_ENT(DF, STATIC_TLS) 2342 }; 2343 2344 static const EnumEntry<unsigned> ElfDynamicDTFlags1[] = { 2345 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOW), 2346 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAL), 2347 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GROUP), 2348 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODELETE), 2349 LLVM_READOBJ_DT_FLAG_ENT(DF_1, LOADFLTR), 2350 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INITFIRST), 2351 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOOPEN), 2352 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ORIGIN), 2353 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DIRECT), 2354 LLVM_READOBJ_DT_FLAG_ENT(DF_1, TRANS), 2355 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INTERPOSE), 2356 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODEFLIB), 2357 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODUMP), 2358 LLVM_READOBJ_DT_FLAG_ENT(DF_1, CONFALT), 2359 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ENDFILTEE), 2360 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELDNE), 2361 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELPND), 2362 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODIRECT), 2363 LLVM_READOBJ_DT_FLAG_ENT(DF_1, IGNMULDEF), 2364 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOKSYMS), 2365 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOHDR), 2366 LLVM_READOBJ_DT_FLAG_ENT(DF_1, EDITED), 2367 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NORELOC), 2368 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SYMINTPOSE), 2369 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAUDIT), 2370 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SINGLETON), 2371 LLVM_READOBJ_DT_FLAG_ENT(DF_1, PIE), 2372 }; 2373 2374 static const EnumEntry<unsigned> ElfDynamicDTMipsFlags[] = { 2375 LLVM_READOBJ_DT_FLAG_ENT(RHF, NONE), 2376 LLVM_READOBJ_DT_FLAG_ENT(RHF, QUICKSTART), 2377 LLVM_READOBJ_DT_FLAG_ENT(RHF, NOTPOT), 2378 LLVM_READOBJ_DT_FLAG_ENT(RHS, NO_LIBRARY_REPLACEMENT), 2379 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_MOVE), 2380 LLVM_READOBJ_DT_FLAG_ENT(RHF, SGI_ONLY), 2381 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_INIT), 2382 LLVM_READOBJ_DT_FLAG_ENT(RHF, DELTA_C_PLUS_PLUS), 2383 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_START_INIT), 2384 LLVM_READOBJ_DT_FLAG_ENT(RHF, PIXIE), 2385 LLVM_READOBJ_DT_FLAG_ENT(RHF, DEFAULT_DELAY_LOAD), 2386 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTART), 2387 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTARTED), 2388 LLVM_READOBJ_DT_FLAG_ENT(RHF, CORD), 2389 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_UNRES_UNDEF), 2390 LLVM_READOBJ_DT_FLAG_ENT(RHF, RLD_ORDER_SAFE) 2391 }; 2392 2393 #undef LLVM_READOBJ_DT_FLAG_ENT 2394 2395 template <typename T, typename TFlag> 2396 void printFlags(T Value, ArrayRef<EnumEntry<TFlag>> Flags, raw_ostream &OS) { 2397 using FlagEntry = EnumEntry<TFlag>; 2398 using FlagVector = SmallVector<FlagEntry, 10>; 2399 FlagVector SetFlags; 2400 2401 for (const auto &Flag : Flags) { 2402 if (Flag.Value == 0) 2403 continue; 2404 2405 if ((Value & Flag.Value) == Flag.Value) 2406 SetFlags.push_back(Flag); 2407 } 2408 2409 for (const auto &Flag : SetFlags) { 2410 OS << Flag.Name << " "; 2411 } 2412 } 2413 2414 template <class ELFT> 2415 std::string ELFDumper<ELFT>::getDynamicEntry(uint64_t Type, 2416 uint64_t Value) const { 2417 auto FormatHexValue = [](uint64_t V) { 2418 std::string Str; 2419 raw_string_ostream OS(Str); 2420 const char *ConvChar = 2421 (opts::Output == opts::GNU) ? "0x%" PRIx64 : "0x%" PRIX64; 2422 OS << format(ConvChar, V); 2423 return OS.str(); 2424 }; 2425 2426 auto FormatFlags = [](uint64_t V, 2427 llvm::ArrayRef<llvm::EnumEntry<unsigned int>> Array) { 2428 std::string Str; 2429 raw_string_ostream OS(Str); 2430 printFlags(V, Array, OS); 2431 return OS.str(); 2432 }; 2433 2434 // Handle custom printing of architecture specific tags 2435 switch (ObjF->getELFFile()->getHeader()->e_machine) { 2436 case EM_AARCH64: 2437 switch (Type) { 2438 case DT_AARCH64_BTI_PLT: 2439 case DT_AARCH64_PAC_PLT: 2440 return std::to_string(Value); 2441 default: 2442 break; 2443 } 2444 break; 2445 case EM_HEXAGON: 2446 switch (Type) { 2447 case DT_HEXAGON_VER: 2448 return std::to_string(Value); 2449 case DT_HEXAGON_SYMSZ: 2450 case DT_HEXAGON_PLT: 2451 return FormatHexValue(Value); 2452 default: 2453 break; 2454 } 2455 break; 2456 case EM_MIPS: 2457 switch (Type) { 2458 case DT_MIPS_RLD_VERSION: 2459 case DT_MIPS_LOCAL_GOTNO: 2460 case DT_MIPS_SYMTABNO: 2461 case DT_MIPS_UNREFEXTNO: 2462 return std::to_string(Value); 2463 case DT_MIPS_TIME_STAMP: 2464 case DT_MIPS_ICHECKSUM: 2465 case DT_MIPS_IVERSION: 2466 case DT_MIPS_BASE_ADDRESS: 2467 case DT_MIPS_MSYM: 2468 case DT_MIPS_CONFLICT: 2469 case DT_MIPS_LIBLIST: 2470 case DT_MIPS_CONFLICTNO: 2471 case DT_MIPS_LIBLISTNO: 2472 case DT_MIPS_GOTSYM: 2473 case DT_MIPS_HIPAGENO: 2474 case DT_MIPS_RLD_MAP: 2475 case DT_MIPS_DELTA_CLASS: 2476 case DT_MIPS_DELTA_CLASS_NO: 2477 case DT_MIPS_DELTA_INSTANCE: 2478 case DT_MIPS_DELTA_RELOC: 2479 case DT_MIPS_DELTA_RELOC_NO: 2480 case DT_MIPS_DELTA_SYM: 2481 case DT_MIPS_DELTA_SYM_NO: 2482 case DT_MIPS_DELTA_CLASSSYM: 2483 case DT_MIPS_DELTA_CLASSSYM_NO: 2484 case DT_MIPS_CXX_FLAGS: 2485 case DT_MIPS_PIXIE_INIT: 2486 case DT_MIPS_SYMBOL_LIB: 2487 case DT_MIPS_LOCALPAGE_GOTIDX: 2488 case DT_MIPS_LOCAL_GOTIDX: 2489 case DT_MIPS_HIDDEN_GOTIDX: 2490 case DT_MIPS_PROTECTED_GOTIDX: 2491 case DT_MIPS_OPTIONS: 2492 case DT_MIPS_INTERFACE: 2493 case DT_MIPS_DYNSTR_ALIGN: 2494 case DT_MIPS_INTERFACE_SIZE: 2495 case DT_MIPS_RLD_TEXT_RESOLVE_ADDR: 2496 case DT_MIPS_PERF_SUFFIX: 2497 case DT_MIPS_COMPACT_SIZE: 2498 case DT_MIPS_GP_VALUE: 2499 case DT_MIPS_AUX_DYNAMIC: 2500 case DT_MIPS_PLTGOT: 2501 case DT_MIPS_RWPLT: 2502 case DT_MIPS_RLD_MAP_REL: 2503 return FormatHexValue(Value); 2504 case DT_MIPS_FLAGS: 2505 return FormatFlags(Value, makeArrayRef(ElfDynamicDTMipsFlags)); 2506 default: 2507 break; 2508 } 2509 break; 2510 default: 2511 break; 2512 } 2513 2514 switch (Type) { 2515 case DT_PLTREL: 2516 if (Value == DT_REL) 2517 return "REL"; 2518 if (Value == DT_RELA) 2519 return "RELA"; 2520 LLVM_FALLTHROUGH; 2521 case DT_PLTGOT: 2522 case DT_HASH: 2523 case DT_STRTAB: 2524 case DT_SYMTAB: 2525 case DT_RELA: 2526 case DT_INIT: 2527 case DT_FINI: 2528 case DT_REL: 2529 case DT_JMPREL: 2530 case DT_INIT_ARRAY: 2531 case DT_FINI_ARRAY: 2532 case DT_PREINIT_ARRAY: 2533 case DT_DEBUG: 2534 case DT_VERDEF: 2535 case DT_VERNEED: 2536 case DT_VERSYM: 2537 case DT_GNU_HASH: 2538 case DT_NULL: 2539 return FormatHexValue(Value); 2540 case DT_RELACOUNT: 2541 case DT_RELCOUNT: 2542 case DT_VERDEFNUM: 2543 case DT_VERNEEDNUM: 2544 return std::to_string(Value); 2545 case DT_PLTRELSZ: 2546 case DT_RELASZ: 2547 case DT_RELAENT: 2548 case DT_STRSZ: 2549 case DT_SYMENT: 2550 case DT_RELSZ: 2551 case DT_RELENT: 2552 case DT_INIT_ARRAYSZ: 2553 case DT_FINI_ARRAYSZ: 2554 case DT_PREINIT_ARRAYSZ: 2555 case DT_ANDROID_RELSZ: 2556 case DT_ANDROID_RELASZ: 2557 return std::to_string(Value) + " (bytes)"; 2558 case DT_NEEDED: 2559 case DT_SONAME: 2560 case DT_AUXILIARY: 2561 case DT_USED: 2562 case DT_FILTER: 2563 case DT_RPATH: 2564 case DT_RUNPATH: { 2565 const std::map<uint64_t, const char *> TagNames = { 2566 {DT_NEEDED, "Shared library"}, {DT_SONAME, "Library soname"}, 2567 {DT_AUXILIARY, "Auxiliary library"}, {DT_USED, "Not needed object"}, 2568 {DT_FILTER, "Filter library"}, {DT_RPATH, "Library rpath"}, 2569 {DT_RUNPATH, "Library runpath"}, 2570 }; 2571 2572 return (Twine(TagNames.at(Type)) + ": [" + getDynamicString(Value) + "]") 2573 .str(); 2574 } 2575 case DT_FLAGS: 2576 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags)); 2577 case DT_FLAGS_1: 2578 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags1)); 2579 default: 2580 return FormatHexValue(Value); 2581 } 2582 } 2583 2584 template <class ELFT> 2585 StringRef ELFDumper<ELFT>::getDynamicString(uint64_t Value) const { 2586 if (DynamicStringTable.empty() && !DynamicStringTable.data()) { 2587 reportUniqueWarning(createError("string table was not found")); 2588 return "<?>"; 2589 } 2590 2591 auto WarnAndReturn = [this](const Twine &Msg, uint64_t Offset) { 2592 reportUniqueWarning(createError("string table at offset 0x" + 2593 Twine::utohexstr(Offset) + Msg)); 2594 return "<?>"; 2595 }; 2596 2597 const uint64_t FileSize = ObjF->getELFFile()->getBufSize(); 2598 const uint64_t Offset = 2599 (const uint8_t *)DynamicStringTable.data() - ObjF->getELFFile()->base(); 2600 if (DynamicStringTable.size() > FileSize - Offset) 2601 return WarnAndReturn(" with size 0x" + 2602 Twine::utohexstr(DynamicStringTable.size()) + 2603 " goes past the end of the file (0x" + 2604 Twine::utohexstr(FileSize) + ")", 2605 Offset); 2606 2607 if (Value >= DynamicStringTable.size()) 2608 return WarnAndReturn( 2609 ": unable to read the string at 0x" + Twine::utohexstr(Offset + Value) + 2610 ": it goes past the end of the table (0x" + 2611 Twine::utohexstr(Offset + DynamicStringTable.size()) + ")", 2612 Offset); 2613 2614 if (DynamicStringTable.back() != '\0') 2615 return WarnAndReturn(": unable to read the string at 0x" + 2616 Twine::utohexstr(Offset + Value) + 2617 ": the string table is not null-terminated", 2618 Offset); 2619 2620 return DynamicStringTable.data() + Value; 2621 } 2622 2623 template <class ELFT> void ELFDumper<ELFT>::printUnwindInfo() { 2624 DwarfCFIEH::PrinterContext<ELFT> Ctx(W, ObjF); 2625 Ctx.printUnwindInformation(); 2626 } 2627 2628 namespace { 2629 2630 template <> void ELFDumper<ELF32LE>::printUnwindInfo() { 2631 const ELFFile<ELF32LE> *Obj = ObjF->getELFFile(); 2632 const unsigned Machine = Obj->getHeader()->e_machine; 2633 if (Machine == EM_ARM) { 2634 ARM::EHABI::PrinterContext<ELF32LE> Ctx(W, Obj, ObjF->getFileName(), 2635 DotSymtabSec); 2636 Ctx.PrintUnwindInformation(); 2637 } 2638 DwarfCFIEH::PrinterContext<ELF32LE> Ctx(W, ObjF); 2639 Ctx.printUnwindInformation(); 2640 } 2641 2642 } // end anonymous namespace 2643 2644 template <class ELFT> void ELFDumper<ELFT>::printDynamicTable() { 2645 ELFDumperStyle->printDynamic(ObjF->getELFFile()); 2646 } 2647 2648 template <class ELFT> void ELFDumper<ELFT>::printNeededLibraries() { 2649 ListScope D(W, "NeededLibraries"); 2650 2651 std::vector<StringRef> Libs; 2652 for (const auto &Entry : dynamic_table()) 2653 if (Entry.d_tag == ELF::DT_NEEDED) 2654 Libs.push_back(getDynamicString(Entry.d_un.d_val)); 2655 2656 llvm::sort(Libs); 2657 2658 for (StringRef L : Libs) 2659 W.startLine() << L << "\n"; 2660 } 2661 2662 template <class ELFT> 2663 static Error checkHashTable(const ELFFile<ELFT> *Obj, 2664 const typename ELFT::Hash *H, 2665 bool *IsHeaderValid = nullptr) { 2666 auto MakeError = [&](uint64_t Off, const Twine &Msg = "") { 2667 return createError("the hash table at offset 0x" + Twine::utohexstr(Off) + 2668 " goes past the end of the file (0x" + 2669 Twine::utohexstr(Obj->getBufSize()) + ")" + Msg); 2670 }; 2671 2672 // Each SHT_HASH section starts from two 32-bit fields: nbucket and nchain. 2673 const unsigned HeaderSize = 2 * sizeof(typename ELFT::Word); 2674 const uint64_t SecOffset = (const uint8_t *)H - Obj->base(); 2675 2676 if (IsHeaderValid) 2677 *IsHeaderValid = Obj->getBufSize() - SecOffset >= HeaderSize; 2678 2679 if (Obj->getBufSize() - SecOffset < HeaderSize) 2680 return MakeError(SecOffset); 2681 2682 if (Obj->getBufSize() - SecOffset - HeaderSize < 2683 ((uint64_t)H->nbucket + H->nchain) * sizeof(typename ELFT::Word)) 2684 return MakeError(SecOffset, ", nbucket = " + Twine(H->nbucket) + 2685 ", nchain = " + Twine(H->nchain)); 2686 return Error::success(); 2687 } 2688 2689 template <class ELFT> 2690 static Error checkGNUHashTable(const ELFFile<ELFT> *Obj, 2691 const typename ELFT::GnuHash *GnuHashTable, 2692 bool *IsHeaderValid = nullptr) { 2693 const uint8_t *TableData = reinterpret_cast<const uint8_t *>(GnuHashTable); 2694 assert(TableData >= Obj->base() && 2695 TableData < Obj->base() + Obj->getBufSize() && 2696 "GnuHashTable must always point to a location inside the file"); 2697 2698 uint64_t TableOffset = TableData - Obj->base(); 2699 if (IsHeaderValid) 2700 *IsHeaderValid = TableOffset + /*Header size:*/ 16 < Obj->getBufSize(); 2701 if (TableOffset + 16 + (uint64_t)GnuHashTable->nbuckets * 4 + 2702 (uint64_t)GnuHashTable->maskwords * sizeof(typename ELFT::Off) >= 2703 Obj->getBufSize()) 2704 return createError("unable to dump the SHT_GNU_HASH " 2705 "section at 0x" + 2706 Twine::utohexstr(TableOffset) + 2707 ": it goes past the end of the file"); 2708 return Error::success(); 2709 } 2710 2711 template <typename ELFT> void ELFDumper<ELFT>::printHashTable() { 2712 DictScope D(W, "HashTable"); 2713 if (!HashTable) 2714 return; 2715 2716 bool IsHeaderValid; 2717 Error Err = checkHashTable(ObjF->getELFFile(), HashTable, &IsHeaderValid); 2718 if (IsHeaderValid) { 2719 W.printNumber("Num Buckets", HashTable->nbucket); 2720 W.printNumber("Num Chains", HashTable->nchain); 2721 } 2722 2723 if (Err) { 2724 reportUniqueWarning(std::move(Err)); 2725 return; 2726 } 2727 2728 W.printList("Buckets", HashTable->buckets()); 2729 W.printList("Chains", HashTable->chains()); 2730 } 2731 2732 template <class ELFT> 2733 static Expected<ArrayRef<typename ELFT::Word>> 2734 getGnuHashTableChains(Optional<DynRegionInfo> DynSymRegion, 2735 const typename ELFT::GnuHash *GnuHashTable) { 2736 if (!DynSymRegion) 2737 return createError("no dynamic symbol table found"); 2738 2739 ArrayRef<typename ELFT::Sym> DynSymTable = 2740 DynSymRegion->getAsArrayRef<typename ELFT::Sym>(); 2741 size_t NumSyms = DynSymTable.size(); 2742 if (!NumSyms) 2743 return createError("the dynamic symbol table is empty"); 2744 2745 if (GnuHashTable->symndx < NumSyms) 2746 return GnuHashTable->values(NumSyms); 2747 2748 // A normal empty GNU hash table section produced by linker might have 2749 // symndx set to the number of dynamic symbols + 1 (for the zero symbol) 2750 // and have dummy null values in the Bloom filter and in the buckets 2751 // vector (or no values at all). It happens because the value of symndx is not 2752 // important for dynamic loaders when the GNU hash table is empty. They just 2753 // skip the whole object during symbol lookup. In such cases, the symndx value 2754 // is irrelevant and we should not report a warning. 2755 ArrayRef<typename ELFT::Word> Buckets = GnuHashTable->buckets(); 2756 if (!llvm::all_of(Buckets, [](typename ELFT::Word V) { return V == 0; })) 2757 return createError("the first hashed symbol index (" + 2758 Twine(GnuHashTable->symndx) + 2759 ") is larger than the number of dynamic symbols (" + 2760 Twine(NumSyms) + ")"); 2761 // There is no way to represent an array of (dynamic symbols count - symndx) 2762 // length. 2763 return ArrayRef<typename ELFT::Word>(); 2764 } 2765 2766 template <typename ELFT> 2767 void ELFDumper<ELFT>::printGnuHashTable(const object::ObjectFile *Obj) { 2768 DictScope D(W, "GnuHashTable"); 2769 if (!GnuHashTable) 2770 return; 2771 2772 bool IsHeaderValid; 2773 Error Err = 2774 checkGNUHashTable<ELFT>(ObjF->getELFFile(), GnuHashTable, &IsHeaderValid); 2775 if (IsHeaderValid) { 2776 W.printNumber("Num Buckets", GnuHashTable->nbuckets); 2777 W.printNumber("First Hashed Symbol Index", GnuHashTable->symndx); 2778 W.printNumber("Num Mask Words", GnuHashTable->maskwords); 2779 W.printNumber("Shift Count", GnuHashTable->shift2); 2780 } 2781 2782 if (Err) { 2783 reportUniqueWarning(std::move(Err)); 2784 return; 2785 } 2786 2787 ArrayRef<typename ELFT::Off> BloomFilter = GnuHashTable->filter(); 2788 W.printHexList("Bloom Filter", BloomFilter); 2789 2790 ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets(); 2791 W.printList("Buckets", Buckets); 2792 2793 Expected<ArrayRef<Elf_Word>> Chains = 2794 getGnuHashTableChains<ELFT>(DynSymRegion, GnuHashTable); 2795 if (!Chains) { 2796 reportUniqueWarning( 2797 createError("unable to dump 'Values' for the SHT_GNU_HASH " 2798 "section: " + 2799 toString(Chains.takeError()))); 2800 return; 2801 } 2802 2803 W.printHexList("Values", *Chains); 2804 } 2805 2806 template <typename ELFT> void ELFDumper<ELFT>::printLoadName() { 2807 W.printString("LoadName", SOName); 2808 } 2809 2810 template <class ELFT> void ELFDumper<ELFT>::printArchSpecificInfo() { 2811 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2812 switch (Obj->getHeader()->e_machine) { 2813 case EM_ARM: 2814 case EM_RISCV: 2815 printAttributes(); 2816 break; 2817 case EM_MIPS: { 2818 ELFDumperStyle->printMipsABIFlags(ObjF); 2819 printMipsOptions(); 2820 printMipsReginfo(); 2821 2822 MipsGOTParser<ELFT> Parser(Obj, ObjF->getFileName(), dynamic_table(), 2823 dynamic_symbols()); 2824 if (Parser.hasGot()) 2825 ELFDumperStyle->printMipsGOT(Parser); 2826 if (Parser.hasPlt()) 2827 ELFDumperStyle->printMipsPLT(Parser); 2828 break; 2829 } 2830 default: 2831 break; 2832 } 2833 } 2834 2835 namespace { 2836 2837 template <class ELFT> void ELFDumper<ELFT>::printAttributes() { 2838 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2839 if (!Obj->isLE()) { 2840 W.startLine() << "Attributes not implemented.\n"; 2841 return; 2842 } 2843 2844 const unsigned Machine = Obj->getHeader()->e_machine; 2845 assert((Machine == EM_ARM || Machine == EM_RISCV) && 2846 "Attributes not implemented."); 2847 2848 DictScope BA(W, "BuildAttributes"); 2849 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 2850 if (Sec.sh_type != ELF::SHT_ARM_ATTRIBUTES && 2851 Sec.sh_type != ELF::SHT_RISCV_ATTRIBUTES) 2852 continue; 2853 2854 ArrayRef<uint8_t> Contents = 2855 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(&Sec)); 2856 if (Contents[0] != ELFAttrs::Format_Version) { 2857 reportWarning(createError(Twine("unrecognised FormatVersion: 0x") + 2858 Twine::utohexstr(Contents[0])), 2859 ObjF->getFileName()); 2860 continue; 2861 } 2862 W.printHex("FormatVersion", Contents[0]); 2863 if (Contents.size() == 1) 2864 continue; 2865 2866 // TODO: Delete the redundant FormatVersion check above. 2867 if (Machine == EM_ARM) { 2868 if (Error E = ARMAttributeParser(&W).parse(Contents, support::little)) 2869 reportWarning(std::move(E), ObjF->getFileName()); 2870 } else if (Machine == EM_RISCV) { 2871 if (Error E = RISCVAttributeParser(&W).parse(Contents, support::little)) 2872 reportWarning(std::move(E), ObjF->getFileName()); 2873 } 2874 } 2875 } 2876 2877 template <class ELFT> class MipsGOTParser { 2878 public: 2879 TYPEDEF_ELF_TYPES(ELFT) 2880 using Entry = typename ELFO::Elf_Addr; 2881 using Entries = ArrayRef<Entry>; 2882 2883 const bool IsStatic; 2884 const ELFO * const Obj; 2885 2886 MipsGOTParser(const ELFO *Obj, StringRef FileName, Elf_Dyn_Range DynTable, 2887 Elf_Sym_Range DynSyms); 2888 2889 bool hasGot() const { return !GotEntries.empty(); } 2890 bool hasPlt() const { return !PltEntries.empty(); } 2891 2892 uint64_t getGp() const; 2893 2894 const Entry *getGotLazyResolver() const; 2895 const Entry *getGotModulePointer() const; 2896 const Entry *getPltLazyResolver() const; 2897 const Entry *getPltModulePointer() const; 2898 2899 Entries getLocalEntries() const; 2900 Entries getGlobalEntries() const; 2901 Entries getOtherEntries() const; 2902 Entries getPltEntries() const; 2903 2904 uint64_t getGotAddress(const Entry * E) const; 2905 int64_t getGotOffset(const Entry * E) const; 2906 const Elf_Sym *getGotSym(const Entry *E) const; 2907 2908 uint64_t getPltAddress(const Entry * E) const; 2909 const Elf_Sym *getPltSym(const Entry *E) const; 2910 2911 StringRef getPltStrTable() const { return PltStrTable; } 2912 2913 private: 2914 const Elf_Shdr *GotSec; 2915 size_t LocalNum; 2916 size_t GlobalNum; 2917 2918 const Elf_Shdr *PltSec; 2919 const Elf_Shdr *PltRelSec; 2920 const Elf_Shdr *PltSymTable; 2921 StringRef FileName; 2922 2923 Elf_Sym_Range GotDynSyms; 2924 StringRef PltStrTable; 2925 2926 Entries GotEntries; 2927 Entries PltEntries; 2928 }; 2929 2930 } // end anonymous namespace 2931 2932 template <class ELFT> 2933 MipsGOTParser<ELFT>::MipsGOTParser(const ELFO *Obj, StringRef FileName, 2934 Elf_Dyn_Range DynTable, 2935 Elf_Sym_Range DynSyms) 2936 : IsStatic(DynTable.empty()), Obj(Obj), GotSec(nullptr), LocalNum(0), 2937 GlobalNum(0), PltSec(nullptr), PltRelSec(nullptr), PltSymTable(nullptr), 2938 FileName(FileName) { 2939 // See "Global Offset Table" in Chapter 5 in the following document 2940 // for detailed GOT description. 2941 // ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf 2942 2943 // Find static GOT secton. 2944 if (IsStatic) { 2945 GotSec = findSectionByName(*Obj, FileName, ".got"); 2946 if (!GotSec) 2947 return; 2948 2949 ArrayRef<uint8_t> Content = 2950 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 2951 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2952 Content.size() / sizeof(Entry)); 2953 LocalNum = GotEntries.size(); 2954 return; 2955 } 2956 2957 // Lookup dynamic table tags which define GOT/PLT layouts. 2958 Optional<uint64_t> DtPltGot; 2959 Optional<uint64_t> DtLocalGotNum; 2960 Optional<uint64_t> DtGotSym; 2961 Optional<uint64_t> DtMipsPltGot; 2962 Optional<uint64_t> DtJmpRel; 2963 for (const auto &Entry : DynTable) { 2964 switch (Entry.getTag()) { 2965 case ELF::DT_PLTGOT: 2966 DtPltGot = Entry.getVal(); 2967 break; 2968 case ELF::DT_MIPS_LOCAL_GOTNO: 2969 DtLocalGotNum = Entry.getVal(); 2970 break; 2971 case ELF::DT_MIPS_GOTSYM: 2972 DtGotSym = Entry.getVal(); 2973 break; 2974 case ELF::DT_MIPS_PLTGOT: 2975 DtMipsPltGot = Entry.getVal(); 2976 break; 2977 case ELF::DT_JMPREL: 2978 DtJmpRel = Entry.getVal(); 2979 break; 2980 } 2981 } 2982 2983 // Find dynamic GOT section. 2984 if (DtPltGot || DtLocalGotNum || DtGotSym) { 2985 if (!DtPltGot) 2986 report_fatal_error("Cannot find PLTGOT dynamic table tag."); 2987 if (!DtLocalGotNum) 2988 report_fatal_error("Cannot find MIPS_LOCAL_GOTNO dynamic table tag."); 2989 if (!DtGotSym) 2990 report_fatal_error("Cannot find MIPS_GOTSYM dynamic table tag."); 2991 2992 size_t DynSymTotal = DynSyms.size(); 2993 if (*DtGotSym > DynSymTotal) 2994 reportError( 2995 createError("MIPS_GOTSYM exceeds a number of dynamic symbols"), 2996 FileName); 2997 2998 GotSec = findNotEmptySectionByAddress(Obj, FileName, *DtPltGot); 2999 if (!GotSec) 3000 reportError(createError("There is no not empty GOT section at 0x" + 3001 Twine::utohexstr(*DtPltGot)), 3002 FileName); 3003 3004 LocalNum = *DtLocalGotNum; 3005 GlobalNum = DynSymTotal - *DtGotSym; 3006 3007 ArrayRef<uint8_t> Content = 3008 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 3009 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 3010 Content.size() / sizeof(Entry)); 3011 GotDynSyms = DynSyms.drop_front(*DtGotSym); 3012 } 3013 3014 // Find PLT section. 3015 if (DtMipsPltGot || DtJmpRel) { 3016 if (!DtMipsPltGot) 3017 report_fatal_error("Cannot find MIPS_PLTGOT dynamic table tag."); 3018 if (!DtJmpRel) 3019 report_fatal_error("Cannot find JMPREL dynamic table tag."); 3020 3021 PltSec = findNotEmptySectionByAddress(Obj, FileName, * DtMipsPltGot); 3022 if (!PltSec) 3023 report_fatal_error("There is no not empty PLTGOT section at 0x " + 3024 Twine::utohexstr(*DtMipsPltGot)); 3025 3026 PltRelSec = findNotEmptySectionByAddress(Obj, FileName, * DtJmpRel); 3027 if (!PltRelSec) 3028 report_fatal_error("There is no not empty RELPLT section at 0x" + 3029 Twine::utohexstr(*DtJmpRel)); 3030 3031 ArrayRef<uint8_t> PltContent = 3032 unwrapOrError(FileName, Obj->getSectionContents(PltSec)); 3033 PltEntries = Entries(reinterpret_cast<const Entry *>(PltContent.data()), 3034 PltContent.size() / sizeof(Entry)); 3035 3036 PltSymTable = unwrapOrError(FileName, Obj->getSection(PltRelSec->sh_link)); 3037 PltStrTable = 3038 unwrapOrError(FileName, Obj->getStringTableForSymtab(*PltSymTable)); 3039 } 3040 } 3041 3042 template <class ELFT> uint64_t MipsGOTParser<ELFT>::getGp() const { 3043 return GotSec->sh_addr + 0x7ff0; 3044 } 3045 3046 template <class ELFT> 3047 const typename MipsGOTParser<ELFT>::Entry * 3048 MipsGOTParser<ELFT>::getGotLazyResolver() const { 3049 return LocalNum > 0 ? &GotEntries[0] : nullptr; 3050 } 3051 3052 template <class ELFT> 3053 const typename MipsGOTParser<ELFT>::Entry * 3054 MipsGOTParser<ELFT>::getGotModulePointer() const { 3055 if (LocalNum < 2) 3056 return nullptr; 3057 const Entry &E = GotEntries[1]; 3058 if ((E >> (sizeof(Entry) * 8 - 1)) == 0) 3059 return nullptr; 3060 return &E; 3061 } 3062 3063 template <class ELFT> 3064 typename MipsGOTParser<ELFT>::Entries 3065 MipsGOTParser<ELFT>::getLocalEntries() const { 3066 size_t Skip = getGotModulePointer() ? 2 : 1; 3067 if (LocalNum - Skip <= 0) 3068 return Entries(); 3069 return GotEntries.slice(Skip, LocalNum - Skip); 3070 } 3071 3072 template <class ELFT> 3073 typename MipsGOTParser<ELFT>::Entries 3074 MipsGOTParser<ELFT>::getGlobalEntries() const { 3075 if (GlobalNum == 0) 3076 return Entries(); 3077 return GotEntries.slice(LocalNum, GlobalNum); 3078 } 3079 3080 template <class ELFT> 3081 typename MipsGOTParser<ELFT>::Entries 3082 MipsGOTParser<ELFT>::getOtherEntries() const { 3083 size_t OtherNum = GotEntries.size() - LocalNum - GlobalNum; 3084 if (OtherNum == 0) 3085 return Entries(); 3086 return GotEntries.slice(LocalNum + GlobalNum, OtherNum); 3087 } 3088 3089 template <class ELFT> 3090 uint64_t MipsGOTParser<ELFT>::getGotAddress(const Entry *E) const { 3091 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3092 return GotSec->sh_addr + Offset; 3093 } 3094 3095 template <class ELFT> 3096 int64_t MipsGOTParser<ELFT>::getGotOffset(const Entry *E) const { 3097 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3098 return Offset - 0x7ff0; 3099 } 3100 3101 template <class ELFT> 3102 const typename MipsGOTParser<ELFT>::Elf_Sym * 3103 MipsGOTParser<ELFT>::getGotSym(const Entry *E) const { 3104 int64_t Offset = std::distance(GotEntries.data(), E); 3105 return &GotDynSyms[Offset - LocalNum]; 3106 } 3107 3108 template <class ELFT> 3109 const typename MipsGOTParser<ELFT>::Entry * 3110 MipsGOTParser<ELFT>::getPltLazyResolver() const { 3111 return PltEntries.empty() ? nullptr : &PltEntries[0]; 3112 } 3113 3114 template <class ELFT> 3115 const typename MipsGOTParser<ELFT>::Entry * 3116 MipsGOTParser<ELFT>::getPltModulePointer() const { 3117 return PltEntries.size() < 2 ? nullptr : &PltEntries[1]; 3118 } 3119 3120 template <class ELFT> 3121 typename MipsGOTParser<ELFT>::Entries 3122 MipsGOTParser<ELFT>::getPltEntries() const { 3123 if (PltEntries.size() <= 2) 3124 return Entries(); 3125 return PltEntries.slice(2, PltEntries.size() - 2); 3126 } 3127 3128 template <class ELFT> 3129 uint64_t MipsGOTParser<ELFT>::getPltAddress(const Entry *E) const { 3130 int64_t Offset = std::distance(PltEntries.data(), E) * sizeof(Entry); 3131 return PltSec->sh_addr + Offset; 3132 } 3133 3134 template <class ELFT> 3135 const typename MipsGOTParser<ELFT>::Elf_Sym * 3136 MipsGOTParser<ELFT>::getPltSym(const Entry *E) const { 3137 int64_t Offset = std::distance(getPltEntries().data(), E); 3138 if (PltRelSec->sh_type == ELF::SHT_REL) { 3139 Elf_Rel_Range Rels = unwrapOrError(FileName, Obj->rels(PltRelSec)); 3140 return unwrapOrError(FileName, 3141 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3142 } else { 3143 Elf_Rela_Range Rels = unwrapOrError(FileName, Obj->relas(PltRelSec)); 3144 return unwrapOrError(FileName, 3145 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3146 } 3147 } 3148 3149 static const EnumEntry<unsigned> ElfMipsISAExtType[] = { 3150 {"None", Mips::AFL_EXT_NONE}, 3151 {"Broadcom SB-1", Mips::AFL_EXT_SB1}, 3152 {"Cavium Networks Octeon", Mips::AFL_EXT_OCTEON}, 3153 {"Cavium Networks Octeon2", Mips::AFL_EXT_OCTEON2}, 3154 {"Cavium Networks OcteonP", Mips::AFL_EXT_OCTEONP}, 3155 {"Cavium Networks Octeon3", Mips::AFL_EXT_OCTEON3}, 3156 {"LSI R4010", Mips::AFL_EXT_4010}, 3157 {"Loongson 2E", Mips::AFL_EXT_LOONGSON_2E}, 3158 {"Loongson 2F", Mips::AFL_EXT_LOONGSON_2F}, 3159 {"Loongson 3A", Mips::AFL_EXT_LOONGSON_3A}, 3160 {"MIPS R4650", Mips::AFL_EXT_4650}, 3161 {"MIPS R5900", Mips::AFL_EXT_5900}, 3162 {"MIPS R10000", Mips::AFL_EXT_10000}, 3163 {"NEC VR4100", Mips::AFL_EXT_4100}, 3164 {"NEC VR4111/VR4181", Mips::AFL_EXT_4111}, 3165 {"NEC VR4120", Mips::AFL_EXT_4120}, 3166 {"NEC VR5400", Mips::AFL_EXT_5400}, 3167 {"NEC VR5500", Mips::AFL_EXT_5500}, 3168 {"RMI Xlr", Mips::AFL_EXT_XLR}, 3169 {"Toshiba R3900", Mips::AFL_EXT_3900} 3170 }; 3171 3172 static const EnumEntry<unsigned> ElfMipsASEFlags[] = { 3173 {"DSP", Mips::AFL_ASE_DSP}, 3174 {"DSPR2", Mips::AFL_ASE_DSPR2}, 3175 {"Enhanced VA Scheme", Mips::AFL_ASE_EVA}, 3176 {"MCU", Mips::AFL_ASE_MCU}, 3177 {"MDMX", Mips::AFL_ASE_MDMX}, 3178 {"MIPS-3D", Mips::AFL_ASE_MIPS3D}, 3179 {"MT", Mips::AFL_ASE_MT}, 3180 {"SmartMIPS", Mips::AFL_ASE_SMARTMIPS}, 3181 {"VZ", Mips::AFL_ASE_VIRT}, 3182 {"MSA", Mips::AFL_ASE_MSA}, 3183 {"MIPS16", Mips::AFL_ASE_MIPS16}, 3184 {"microMIPS", Mips::AFL_ASE_MICROMIPS}, 3185 {"XPA", Mips::AFL_ASE_XPA}, 3186 {"CRC", Mips::AFL_ASE_CRC}, 3187 {"GINV", Mips::AFL_ASE_GINV}, 3188 }; 3189 3190 static const EnumEntry<unsigned> ElfMipsFpABIType[] = { 3191 {"Hard or soft float", Mips::Val_GNU_MIPS_ABI_FP_ANY}, 3192 {"Hard float (double precision)", Mips::Val_GNU_MIPS_ABI_FP_DOUBLE}, 3193 {"Hard float (single precision)", Mips::Val_GNU_MIPS_ABI_FP_SINGLE}, 3194 {"Soft float", Mips::Val_GNU_MIPS_ABI_FP_SOFT}, 3195 {"Hard float (MIPS32r2 64-bit FPU 12 callee-saved)", 3196 Mips::Val_GNU_MIPS_ABI_FP_OLD_64}, 3197 {"Hard float (32-bit CPU, Any FPU)", Mips::Val_GNU_MIPS_ABI_FP_XX}, 3198 {"Hard float (32-bit CPU, 64-bit FPU)", Mips::Val_GNU_MIPS_ABI_FP_64}, 3199 {"Hard float compat (32-bit CPU, 64-bit FPU)", 3200 Mips::Val_GNU_MIPS_ABI_FP_64A} 3201 }; 3202 3203 static const EnumEntry<unsigned> ElfMipsFlags1[] { 3204 {"ODDSPREG", Mips::AFL_FLAGS1_ODDSPREG}, 3205 }; 3206 3207 static int getMipsRegisterSize(uint8_t Flag) { 3208 switch (Flag) { 3209 case Mips::AFL_REG_NONE: 3210 return 0; 3211 case Mips::AFL_REG_32: 3212 return 32; 3213 case Mips::AFL_REG_64: 3214 return 64; 3215 case Mips::AFL_REG_128: 3216 return 128; 3217 default: 3218 return -1; 3219 } 3220 } 3221 3222 template <class ELFT> 3223 static void printMipsReginfoData(ScopedPrinter &W, 3224 const Elf_Mips_RegInfo<ELFT> &Reginfo) { 3225 W.printHex("GP", Reginfo.ri_gp_value); 3226 W.printHex("General Mask", Reginfo.ri_gprmask); 3227 W.printHex("Co-Proc Mask0", Reginfo.ri_cprmask[0]); 3228 W.printHex("Co-Proc Mask1", Reginfo.ri_cprmask[1]); 3229 W.printHex("Co-Proc Mask2", Reginfo.ri_cprmask[2]); 3230 W.printHex("Co-Proc Mask3", Reginfo.ri_cprmask[3]); 3231 } 3232 3233 template <class ELFT> void ELFDumper<ELFT>::printMipsReginfo() { 3234 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3235 const Elf_Shdr *Shdr = findSectionByName(*Obj, ObjF->getFileName(), ".reginfo"); 3236 if (!Shdr) { 3237 W.startLine() << "There is no .reginfo section in the file.\n"; 3238 return; 3239 } 3240 ArrayRef<uint8_t> Sec = 3241 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3242 if (Sec.size() != sizeof(Elf_Mips_RegInfo<ELFT>)) { 3243 W.startLine() << "The .reginfo section has a wrong size.\n"; 3244 return; 3245 } 3246 3247 DictScope GS(W, "MIPS RegInfo"); 3248 auto *Reginfo = reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(Sec.data()); 3249 printMipsReginfoData(W, *Reginfo); 3250 } 3251 3252 template <class ELFT> void ELFDumper<ELFT>::printMipsOptions() { 3253 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3254 const Elf_Shdr *Shdr = 3255 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.options"); 3256 if (!Shdr) { 3257 W.startLine() << "There is no .MIPS.options section in the file.\n"; 3258 return; 3259 } 3260 3261 DictScope GS(W, "MIPS Options"); 3262 3263 ArrayRef<uint8_t> Sec = 3264 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3265 while (!Sec.empty()) { 3266 if (Sec.size() < sizeof(Elf_Mips_Options<ELFT>)) { 3267 W.startLine() << "The .MIPS.options section has a wrong size.\n"; 3268 return; 3269 } 3270 auto *O = reinterpret_cast<const Elf_Mips_Options<ELFT> *>(Sec.data()); 3271 DictScope GS(W, getElfMipsOptionsOdkType(O->kind)); 3272 switch (O->kind) { 3273 case ODK_REGINFO: 3274 printMipsReginfoData(W, O->getRegInfo()); 3275 break; 3276 default: 3277 W.startLine() << "Unsupported MIPS options tag.\n"; 3278 break; 3279 } 3280 Sec = Sec.slice(O->size); 3281 } 3282 } 3283 3284 template <class ELFT> void ELFDumper<ELFT>::printStackMap() const { 3285 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3286 const Elf_Shdr *StackMapSection = nullptr; 3287 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 3288 StringRef Name = 3289 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec)); 3290 if (Name == ".llvm_stackmaps") { 3291 StackMapSection = &Sec; 3292 break; 3293 } 3294 } 3295 3296 if (!StackMapSection) 3297 return; 3298 3299 ArrayRef<uint8_t> StackMapContentsArray = unwrapOrError( 3300 ObjF->getFileName(), Obj->getSectionContents(StackMapSection)); 3301 3302 prettyPrintStackMap( 3303 W, StackMapParser<ELFT::TargetEndianness>(StackMapContentsArray)); 3304 } 3305 3306 template <class ELFT> void ELFDumper<ELFT>::printGroupSections() { 3307 ELFDumperStyle->printGroupSections(ObjF->getELFFile()); 3308 } 3309 3310 template <class ELFT> void ELFDumper<ELFT>::printAddrsig() { 3311 ELFDumperStyle->printAddrsig(ObjF->getELFFile()); 3312 } 3313 3314 static inline void printFields(formatted_raw_ostream &OS, StringRef Str1, 3315 StringRef Str2) { 3316 OS.PadToColumn(2u); 3317 OS << Str1; 3318 OS.PadToColumn(37u); 3319 OS << Str2 << "\n"; 3320 OS.flush(); 3321 } 3322 3323 template <class ELFT> 3324 static std::string getSectionHeadersNumString(const ELFFile<ELFT> *Obj, 3325 StringRef FileName) { 3326 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3327 if (ElfHeader->e_shnum != 0) 3328 return to_string(ElfHeader->e_shnum); 3329 3330 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3331 if (Arr.empty()) 3332 return "0"; 3333 return "0 (" + to_string(Arr[0].sh_size) + ")"; 3334 } 3335 3336 template <class ELFT> 3337 static std::string getSectionHeaderTableIndexString(const ELFFile<ELFT> *Obj, 3338 StringRef FileName) { 3339 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3340 if (ElfHeader->e_shstrndx != SHN_XINDEX) 3341 return to_string(ElfHeader->e_shstrndx); 3342 3343 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3344 if (Arr.empty()) 3345 return "65535 (corrupt: out of range)"; 3346 return to_string(ElfHeader->e_shstrndx) + " (" + to_string(Arr[0].sh_link) + 3347 ")"; 3348 } 3349 3350 template <class ELFT> void GNUStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 3351 const Elf_Ehdr *e = Obj->getHeader(); 3352 OS << "ELF Header:\n"; 3353 OS << " Magic: "; 3354 std::string Str; 3355 for (int i = 0; i < ELF::EI_NIDENT; i++) 3356 OS << format(" %02x", static_cast<int>(e->e_ident[i])); 3357 OS << "\n"; 3358 Str = printEnum(e->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 3359 printFields(OS, "Class:", Str); 3360 Str = printEnum(e->e_ident[ELF::EI_DATA], makeArrayRef(ElfDataEncoding)); 3361 printFields(OS, "Data:", Str); 3362 OS.PadToColumn(2u); 3363 OS << "Version:"; 3364 OS.PadToColumn(37u); 3365 OS << to_hexString(e->e_ident[ELF::EI_VERSION]); 3366 if (e->e_version == ELF::EV_CURRENT) 3367 OS << " (current)"; 3368 OS << "\n"; 3369 Str = printEnum(e->e_ident[ELF::EI_OSABI], makeArrayRef(ElfOSABI)); 3370 printFields(OS, "OS/ABI:", Str); 3371 printFields(OS, 3372 "ABI Version:", std::to_string(e->e_ident[ELF::EI_ABIVERSION])); 3373 Str = printEnum(e->e_type, makeArrayRef(ElfObjectFileType)); 3374 printFields(OS, "Type:", Str); 3375 Str = printEnum(e->e_machine, makeArrayRef(ElfMachineType)); 3376 printFields(OS, "Machine:", Str); 3377 Str = "0x" + to_hexString(e->e_version); 3378 printFields(OS, "Version:", Str); 3379 Str = "0x" + to_hexString(e->e_entry); 3380 printFields(OS, "Entry point address:", Str); 3381 Str = to_string(e->e_phoff) + " (bytes into file)"; 3382 printFields(OS, "Start of program headers:", Str); 3383 Str = to_string(e->e_shoff) + " (bytes into file)"; 3384 printFields(OS, "Start of section headers:", Str); 3385 std::string ElfFlags; 3386 if (e->e_machine == EM_MIPS) 3387 ElfFlags = 3388 printFlags(e->e_flags, makeArrayRef(ElfHeaderMipsFlags), 3389 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 3390 unsigned(ELF::EF_MIPS_MACH)); 3391 else if (e->e_machine == EM_RISCV) 3392 ElfFlags = printFlags(e->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 3393 Str = "0x" + to_hexString(e->e_flags); 3394 if (!ElfFlags.empty()) 3395 Str = Str + ", " + ElfFlags; 3396 printFields(OS, "Flags:", Str); 3397 Str = to_string(e->e_ehsize) + " (bytes)"; 3398 printFields(OS, "Size of this header:", Str); 3399 Str = to_string(e->e_phentsize) + " (bytes)"; 3400 printFields(OS, "Size of program headers:", Str); 3401 Str = to_string(e->e_phnum); 3402 printFields(OS, "Number of program headers:", Str); 3403 Str = to_string(e->e_shentsize) + " (bytes)"; 3404 printFields(OS, "Size of section headers:", Str); 3405 Str = getSectionHeadersNumString(Obj, this->FileName); 3406 printFields(OS, "Number of section headers:", Str); 3407 Str = getSectionHeaderTableIndexString(Obj, this->FileName); 3408 printFields(OS, "Section header string table index:", Str); 3409 } 3410 3411 namespace { 3412 struct GroupMember { 3413 StringRef Name; 3414 uint64_t Index; 3415 }; 3416 3417 struct GroupSection { 3418 StringRef Name; 3419 std::string Signature; 3420 uint64_t ShName; 3421 uint64_t Index; 3422 uint32_t Link; 3423 uint32_t Info; 3424 uint32_t Type; 3425 std::vector<GroupMember> Members; 3426 }; 3427 3428 template <class ELFT> 3429 std::vector<GroupSection> getGroups(const ELFFile<ELFT> *Obj, 3430 StringRef FileName) { 3431 using Elf_Shdr = typename ELFT::Shdr; 3432 using Elf_Sym = typename ELFT::Sym; 3433 using Elf_Word = typename ELFT::Word; 3434 3435 std::vector<GroupSection> Ret; 3436 uint64_t I = 0; 3437 for (const Elf_Shdr &Sec : unwrapOrError(FileName, Obj->sections())) { 3438 ++I; 3439 if (Sec.sh_type != ELF::SHT_GROUP) 3440 continue; 3441 3442 const Elf_Shdr *Symtab = 3443 unwrapOrError(FileName, Obj->getSection(Sec.sh_link)); 3444 StringRef StrTable = 3445 unwrapOrError(FileName, Obj->getStringTableForSymtab(*Symtab)); 3446 const Elf_Sym *Sym = unwrapOrError( 3447 FileName, Obj->template getEntry<Elf_Sym>(Symtab, Sec.sh_info)); 3448 auto Data = unwrapOrError( 3449 FileName, Obj->template getSectionContentsAsArray<Elf_Word>(&Sec)); 3450 3451 StringRef Name = unwrapOrError(FileName, Obj->getSectionName(&Sec)); 3452 StringRef Signature = StrTable.data() + Sym->st_name; 3453 Ret.push_back({Name, 3454 maybeDemangle(Signature), 3455 Sec.sh_name, 3456 I - 1, 3457 Sec.sh_link, 3458 Sec.sh_info, 3459 Data[0], 3460 {}}); 3461 3462 std::vector<GroupMember> &GM = Ret.back().Members; 3463 for (uint32_t Ndx : Data.slice(1)) { 3464 auto Sec = unwrapOrError(FileName, Obj->getSection(Ndx)); 3465 const StringRef Name = unwrapOrError(FileName, Obj->getSectionName(Sec)); 3466 GM.push_back({Name, Ndx}); 3467 } 3468 } 3469 return Ret; 3470 } 3471 3472 DenseMap<uint64_t, const GroupSection *> 3473 mapSectionsToGroups(ArrayRef<GroupSection> Groups) { 3474 DenseMap<uint64_t, const GroupSection *> Ret; 3475 for (const GroupSection &G : Groups) 3476 for (const GroupMember &GM : G.Members) 3477 Ret.insert({GM.Index, &G}); 3478 return Ret; 3479 } 3480 3481 } // namespace 3482 3483 template <class ELFT> void GNUStyle<ELFT>::printGroupSections(const ELFO *Obj) { 3484 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 3485 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 3486 for (const GroupSection &G : V) { 3487 OS << "\n" 3488 << getGroupType(G.Type) << " group section [" 3489 << format_decimal(G.Index, 5) << "] `" << G.Name << "' [" << G.Signature 3490 << "] contains " << G.Members.size() << " sections:\n" 3491 << " [Index] Name\n"; 3492 for (const GroupMember &GM : G.Members) { 3493 const GroupSection *MainGroup = Map[GM.Index]; 3494 if (MainGroup != &G) { 3495 OS.flush(); 3496 errs() << "Error: section [" << format_decimal(GM.Index, 5) 3497 << "] in group section [" << format_decimal(G.Index, 5) 3498 << "] already in group section [" 3499 << format_decimal(MainGroup->Index, 5) << "]"; 3500 errs().flush(); 3501 continue; 3502 } 3503 OS << " [" << format_decimal(GM.Index, 5) << "] " << GM.Name << "\n"; 3504 } 3505 } 3506 3507 if (V.empty()) 3508 OS << "There are no section groups in this file.\n"; 3509 } 3510 3511 template <class ELFT> 3512 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 3513 const Elf_Shdr *SymTab, const Elf_Rela &R, 3514 unsigned RelIndex, bool IsRela) { 3515 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 3516 this->dumper()->getRelocationTarget(SymTab, R); 3517 if (!Target) 3518 this->reportUniqueWarning(createError( 3519 "unable to print relocation " + Twine(RelIndex) + " in section " + 3520 Twine(SecIndex) + ": " + toString(Target.takeError()))); 3521 else 3522 printRelocation(Obj, /*Sym=*/Target->first, /*Name=*/Target->second, R, 3523 IsRela); 3524 } 3525 3526 template <class ELFT> 3527 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, const Elf_Sym *Sym, 3528 StringRef SymbolName, const Elf_Rela &R, 3529 bool IsRela) { 3530 // First two fields are bit width dependent. The rest of them are fixed width. 3531 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3532 Field Fields[5] = {0, 10 + Bias, 19 + 2 * Bias, 42 + 2 * Bias, 53 + 2 * Bias}; 3533 unsigned Width = ELFT::Is64Bits ? 16 : 8; 3534 3535 Fields[0].Str = to_string(format_hex_no_prefix(R.r_offset, Width)); 3536 Fields[1].Str = to_string(format_hex_no_prefix(R.r_info, Width)); 3537 3538 SmallString<32> RelocName; 3539 Obj->getRelocationTypeName(R.getType(Obj->isMips64EL()), RelocName); 3540 Fields[2].Str = RelocName.c_str(); 3541 3542 if (Sym) 3543 Fields[3].Str = to_string(format_hex_no_prefix(Sym->getValue(), Width)); 3544 3545 Fields[4].Str = std::string(SymbolName); 3546 for (const Field &F : Fields) 3547 printField(F); 3548 3549 std::string Addend; 3550 if (IsRela) { 3551 int64_t RelAddend = R.r_addend; 3552 if (!SymbolName.empty()) { 3553 if (R.r_addend < 0) { 3554 Addend = " - "; 3555 RelAddend = std::abs(RelAddend); 3556 } else 3557 Addend = " + "; 3558 } 3559 3560 Addend += to_hexString(RelAddend, false); 3561 } 3562 OS << Addend << "\n"; 3563 } 3564 3565 template <class ELFT> void GNUStyle<ELFT>::printRelocHeader(unsigned SType) { 3566 bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA; 3567 bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR; 3568 if (ELFT::Is64Bits) 3569 OS << " "; 3570 else 3571 OS << " "; 3572 if (IsRelr && opts::RawRelr) 3573 OS << "Data "; 3574 else 3575 OS << "Offset"; 3576 if (ELFT::Is64Bits) 3577 OS << " Info Type" 3578 << " Symbol's Value Symbol's Name"; 3579 else 3580 OS << " Info Type Sym. Value Symbol's Name"; 3581 if (IsRela) 3582 OS << " + Addend"; 3583 OS << "\n"; 3584 } 3585 3586 template <class ELFT> void GNUStyle<ELFT>::printRelocations(const ELFO *Obj) { 3587 bool HasRelocSections = false; 3588 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 3589 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 3590 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 3591 Sec.sh_type != ELF::SHT_ANDROID_RELA && 3592 Sec.sh_type != ELF::SHT_ANDROID_RELR) 3593 continue; 3594 HasRelocSections = true; 3595 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 3596 unsigned Entries = Sec.getEntityCount(); 3597 std::vector<Elf_Rela> AndroidRelas; 3598 if (Sec.sh_type == ELF::SHT_ANDROID_REL || 3599 Sec.sh_type == ELF::SHT_ANDROID_RELA) { 3600 // Android's packed relocation section needs to be unpacked first 3601 // to get the actual number of entries. 3602 AndroidRelas = unwrapOrError(this->FileName, Obj->android_relas(&Sec)); 3603 Entries = AndroidRelas.size(); 3604 } 3605 std::vector<Elf_Rela> RelrRelas; 3606 if (!opts::RawRelr && (Sec.sh_type == ELF::SHT_RELR || 3607 Sec.sh_type == ELF::SHT_ANDROID_RELR)) { 3608 // .relr.dyn relative relocation section needs to be unpacked first 3609 // to get the actual number of entries. 3610 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(&Sec)); 3611 RelrRelas = unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 3612 Entries = RelrRelas.size(); 3613 } 3614 uintX_t Offset = Sec.sh_offset; 3615 OS << "\nRelocation section '" << Name << "' at offset 0x" 3616 << to_hexString(Offset, false) << " contains " << Entries 3617 << " entries:\n"; 3618 printRelocHeader(Sec.sh_type); 3619 const Elf_Shdr *SymTab = 3620 unwrapOrError(this->FileName, Obj->getSection(Sec.sh_link)); 3621 unsigned SecNdx = &Sec - &cantFail(Obj->sections()).front(); 3622 unsigned RelNdx = 0; 3623 3624 switch (Sec.sh_type) { 3625 case ELF::SHT_REL: 3626 for (const auto &R : unwrapOrError(this->FileName, Obj->rels(&Sec))) { 3627 Elf_Rela Rela; 3628 Rela.r_offset = R.r_offset; 3629 Rela.r_info = R.r_info; 3630 Rela.r_addend = 0; 3631 printRelocation(Obj, SecNdx, SymTab, Rela, ++RelNdx, false); 3632 } 3633 break; 3634 case ELF::SHT_RELA: 3635 for (const auto &R : unwrapOrError(this->FileName, Obj->relas(&Sec))) 3636 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, true); 3637 break; 3638 case ELF::SHT_RELR: 3639 case ELF::SHT_ANDROID_RELR: 3640 if (opts::RawRelr) 3641 for (const auto &R : unwrapOrError(this->FileName, Obj->relrs(&Sec))) 3642 OS << to_string(format_hex_no_prefix(R, ELFT::Is64Bits ? 16 : 8)) 3643 << "\n"; 3644 else 3645 for (const auto &R : RelrRelas) 3646 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, false); 3647 break; 3648 case ELF::SHT_ANDROID_REL: 3649 case ELF::SHT_ANDROID_RELA: 3650 for (const auto &R : AndroidRelas) 3651 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, 3652 Sec.sh_type == ELF::SHT_ANDROID_RELA); 3653 break; 3654 } 3655 } 3656 if (!HasRelocSections) 3657 OS << "\nThere are no relocations in this file.\n"; 3658 } 3659 3660 // Print the offset of a particular section from anyone of the ranges: 3661 // [SHT_LOOS, SHT_HIOS], [SHT_LOPROC, SHT_HIPROC], [SHT_LOUSER, SHT_HIUSER]. 3662 // If 'Type' does not fall within any of those ranges, then a string is 3663 // returned as '<unknown>' followed by the type value. 3664 static std::string getSectionTypeOffsetString(unsigned Type) { 3665 if (Type >= SHT_LOOS && Type <= SHT_HIOS) 3666 return "LOOS+0x" + to_hexString(Type - SHT_LOOS); 3667 else if (Type >= SHT_LOPROC && Type <= SHT_HIPROC) 3668 return "LOPROC+0x" + to_hexString(Type - SHT_LOPROC); 3669 else if (Type >= SHT_LOUSER && Type <= SHT_HIUSER) 3670 return "LOUSER+0x" + to_hexString(Type - SHT_LOUSER); 3671 return "0x" + to_hexString(Type) + ": <unknown>"; 3672 } 3673 3674 static std::string getSectionTypeString(unsigned Arch, unsigned Type) { 3675 using namespace ELF; 3676 3677 switch (Arch) { 3678 case EM_ARM: 3679 switch (Type) { 3680 case SHT_ARM_EXIDX: 3681 return "ARM_EXIDX"; 3682 case SHT_ARM_PREEMPTMAP: 3683 return "ARM_PREEMPTMAP"; 3684 case SHT_ARM_ATTRIBUTES: 3685 return "ARM_ATTRIBUTES"; 3686 case SHT_ARM_DEBUGOVERLAY: 3687 return "ARM_DEBUGOVERLAY"; 3688 case SHT_ARM_OVERLAYSECTION: 3689 return "ARM_OVERLAYSECTION"; 3690 } 3691 break; 3692 case EM_X86_64: 3693 switch (Type) { 3694 case SHT_X86_64_UNWIND: 3695 return "X86_64_UNWIND"; 3696 } 3697 break; 3698 case EM_MIPS: 3699 case EM_MIPS_RS3_LE: 3700 switch (Type) { 3701 case SHT_MIPS_REGINFO: 3702 return "MIPS_REGINFO"; 3703 case SHT_MIPS_OPTIONS: 3704 return "MIPS_OPTIONS"; 3705 case SHT_MIPS_DWARF: 3706 return "MIPS_DWARF"; 3707 case SHT_MIPS_ABIFLAGS: 3708 return "MIPS_ABIFLAGS"; 3709 } 3710 break; 3711 case EM_RISCV: 3712 switch (Type) { 3713 case SHT_RISCV_ATTRIBUTES: 3714 return "RISCV_ATTRIBUTES"; 3715 } 3716 } 3717 switch (Type) { 3718 case SHT_NULL: 3719 return "NULL"; 3720 case SHT_PROGBITS: 3721 return "PROGBITS"; 3722 case SHT_SYMTAB: 3723 return "SYMTAB"; 3724 case SHT_STRTAB: 3725 return "STRTAB"; 3726 case SHT_RELA: 3727 return "RELA"; 3728 case SHT_HASH: 3729 return "HASH"; 3730 case SHT_DYNAMIC: 3731 return "DYNAMIC"; 3732 case SHT_NOTE: 3733 return "NOTE"; 3734 case SHT_NOBITS: 3735 return "NOBITS"; 3736 case SHT_REL: 3737 return "REL"; 3738 case SHT_SHLIB: 3739 return "SHLIB"; 3740 case SHT_DYNSYM: 3741 return "DYNSYM"; 3742 case SHT_INIT_ARRAY: 3743 return "INIT_ARRAY"; 3744 case SHT_FINI_ARRAY: 3745 return "FINI_ARRAY"; 3746 case SHT_PREINIT_ARRAY: 3747 return "PREINIT_ARRAY"; 3748 case SHT_GROUP: 3749 return "GROUP"; 3750 case SHT_SYMTAB_SHNDX: 3751 return "SYMTAB SECTION INDICES"; 3752 case SHT_ANDROID_REL: 3753 return "ANDROID_REL"; 3754 case SHT_ANDROID_RELA: 3755 return "ANDROID_RELA"; 3756 case SHT_RELR: 3757 case SHT_ANDROID_RELR: 3758 return "RELR"; 3759 case SHT_LLVM_ODRTAB: 3760 return "LLVM_ODRTAB"; 3761 case SHT_LLVM_LINKER_OPTIONS: 3762 return "LLVM_LINKER_OPTIONS"; 3763 case SHT_LLVM_CALL_GRAPH_PROFILE: 3764 return "LLVM_CALL_GRAPH_PROFILE"; 3765 case SHT_LLVM_ADDRSIG: 3766 return "LLVM_ADDRSIG"; 3767 case SHT_LLVM_DEPENDENT_LIBRARIES: 3768 return "LLVM_DEPENDENT_LIBRARIES"; 3769 case SHT_LLVM_SYMPART: 3770 return "LLVM_SYMPART"; 3771 case SHT_LLVM_PART_EHDR: 3772 return "LLVM_PART_EHDR"; 3773 case SHT_LLVM_PART_PHDR: 3774 return "LLVM_PART_PHDR"; 3775 // FIXME: Parse processor specific GNU attributes 3776 case SHT_GNU_ATTRIBUTES: 3777 return "ATTRIBUTES"; 3778 case SHT_GNU_HASH: 3779 return "GNU_HASH"; 3780 case SHT_GNU_verdef: 3781 return "VERDEF"; 3782 case SHT_GNU_verneed: 3783 return "VERNEED"; 3784 case SHT_GNU_versym: 3785 return "VERSYM"; 3786 default: 3787 return getSectionTypeOffsetString(Type); 3788 } 3789 return ""; 3790 } 3791 3792 static void printSectionDescription(formatted_raw_ostream &OS, 3793 unsigned EMachine) { 3794 OS << "Key to Flags:\n"; 3795 OS << " W (write), A (alloc), X (execute), M (merge), S (strings), I " 3796 "(info),\n"; 3797 OS << " L (link order), O (extra OS processing required), G (group), T " 3798 "(TLS),\n"; 3799 OS << " C (compressed), x (unknown), o (OS specific), E (exclude),\n"; 3800 3801 if (EMachine == EM_X86_64) 3802 OS << " l (large), "; 3803 else if (EMachine == EM_ARM) 3804 OS << " y (purecode), "; 3805 else 3806 OS << " "; 3807 3808 OS << "p (processor specific)\n"; 3809 } 3810 3811 template <class ELFT> 3812 void GNUStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 3813 unsigned Bias = ELFT::Is64Bits ? 0 : 8; 3814 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 3815 OS << "There are " << to_string(Sections.size()) 3816 << " section headers, starting at offset " 3817 << "0x" << to_hexString(Obj->getHeader()->e_shoff, false) << ":\n\n"; 3818 OS << "Section Headers:\n"; 3819 Field Fields[11] = { 3820 {"[Nr]", 2}, {"Name", 7}, {"Type", 25}, 3821 {"Address", 41}, {"Off", 58 - Bias}, {"Size", 65 - Bias}, 3822 {"ES", 72 - Bias}, {"Flg", 75 - Bias}, {"Lk", 79 - Bias}, 3823 {"Inf", 82 - Bias}, {"Al", 86 - Bias}}; 3824 for (auto &F : Fields) 3825 printField(F); 3826 OS << "\n"; 3827 3828 const ELFObjectFile<ELFT> *ElfObj = this->dumper()->getElfObject(); 3829 StringRef SecStrTable = unwrapOrError<StringRef>( 3830 ElfObj->getFileName(), 3831 Obj->getSectionStringTable(Sections, this->dumper()->WarningHandler)); 3832 size_t SectionIndex = 0; 3833 for (const Elf_Shdr &Sec : Sections) { 3834 Fields[0].Str = to_string(SectionIndex); 3835 if (SecStrTable.empty()) 3836 Fields[1].Str = "<no-strings>"; 3837 else 3838 Fields[1].Str = std::string(unwrapOrError<StringRef>( 3839 ElfObj->getFileName(), Obj->getSectionName(&Sec, SecStrTable))); 3840 Fields[2].Str = 3841 getSectionTypeString(Obj->getHeader()->e_machine, Sec.sh_type); 3842 Fields[3].Str = 3843 to_string(format_hex_no_prefix(Sec.sh_addr, ELFT::Is64Bits ? 16 : 8)); 3844 Fields[4].Str = to_string(format_hex_no_prefix(Sec.sh_offset, 6)); 3845 Fields[5].Str = to_string(format_hex_no_prefix(Sec.sh_size, 6)); 3846 Fields[6].Str = to_string(format_hex_no_prefix(Sec.sh_entsize, 2)); 3847 Fields[7].Str = getGNUFlags(Obj->getHeader()->e_machine, Sec.sh_flags); 3848 Fields[8].Str = to_string(Sec.sh_link); 3849 Fields[9].Str = to_string(Sec.sh_info); 3850 Fields[10].Str = to_string(Sec.sh_addralign); 3851 3852 OS.PadToColumn(Fields[0].Column); 3853 OS << "[" << right_justify(Fields[0].Str, 2) << "]"; 3854 for (int i = 1; i < 7; i++) 3855 printField(Fields[i]); 3856 OS.PadToColumn(Fields[7].Column); 3857 OS << right_justify(Fields[7].Str, 3); 3858 OS.PadToColumn(Fields[8].Column); 3859 OS << right_justify(Fields[8].Str, 2); 3860 OS.PadToColumn(Fields[9].Column); 3861 OS << right_justify(Fields[9].Str, 3); 3862 OS.PadToColumn(Fields[10].Column); 3863 OS << right_justify(Fields[10].Str, 2); 3864 OS << "\n"; 3865 ++SectionIndex; 3866 } 3867 printSectionDescription(OS, Obj->getHeader()->e_machine); 3868 } 3869 3870 template <class ELFT> 3871 void GNUStyle<ELFT>::printSymtabMessage(const ELFO *Obj, StringRef Name, 3872 size_t Entries, 3873 bool NonVisibilityBitsUsed) { 3874 if (!Name.empty()) 3875 OS << "\nSymbol table '" << Name << "'"; 3876 else 3877 OS << "\nSymbol table for image"; 3878 OS << " contains " << Entries << " entries:\n"; 3879 3880 if (ELFT::Is64Bits) 3881 OS << " Num: Value Size Type Bind Vis"; 3882 else 3883 OS << " Num: Value Size Type Bind Vis"; 3884 3885 if (NonVisibilityBitsUsed) 3886 OS << " "; 3887 OS << " Ndx Name\n"; 3888 } 3889 3890 template <class ELFT> 3891 std::string GNUStyle<ELFT>::getSymbolSectionNdx(const ELFO *Obj, 3892 const Elf_Sym *Symbol, 3893 const Elf_Sym *FirstSym) { 3894 unsigned SectionIndex = Symbol->st_shndx; 3895 switch (SectionIndex) { 3896 case ELF::SHN_UNDEF: 3897 return "UND"; 3898 case ELF::SHN_ABS: 3899 return "ABS"; 3900 case ELF::SHN_COMMON: 3901 return "COM"; 3902 case ELF::SHN_XINDEX: { 3903 Expected<uint32_t> IndexOrErr = object::getExtendedSymbolTableIndex<ELFT>( 3904 Symbol, FirstSym, this->dumper()->getShndxTable()); 3905 if (!IndexOrErr) { 3906 assert(Symbol->st_shndx == SHN_XINDEX && 3907 "getSymbolSectionIndex should only fail due to an invalid " 3908 "SHT_SYMTAB_SHNDX table/reference"); 3909 this->reportUniqueWarning(IndexOrErr.takeError()); 3910 return "RSV[0xffff]"; 3911 } 3912 return to_string(format_decimal(*IndexOrErr, 3)); 3913 } 3914 default: 3915 // Find if: 3916 // Processor specific 3917 if (SectionIndex >= ELF::SHN_LOPROC && SectionIndex <= ELF::SHN_HIPROC) 3918 return std::string("PRC[0x") + 3919 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3920 // OS specific 3921 if (SectionIndex >= ELF::SHN_LOOS && SectionIndex <= ELF::SHN_HIOS) 3922 return std::string("OS[0x") + 3923 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3924 // Architecture reserved: 3925 if (SectionIndex >= ELF::SHN_LORESERVE && 3926 SectionIndex <= ELF::SHN_HIRESERVE) 3927 return std::string("RSV[0x") + 3928 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3929 // A normal section with an index 3930 return to_string(format_decimal(SectionIndex, 3)); 3931 } 3932 } 3933 3934 template <class ELFT> 3935 void GNUStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 3936 const Elf_Sym *FirstSym, StringRef StrTable, 3937 bool IsDynamic, bool NonVisibilityBitsUsed) { 3938 static int Idx = 0; 3939 static bool Dynamic = true; 3940 3941 // If this function was called with a different value from IsDynamic 3942 // from last call, happens when we move from dynamic to static symbol 3943 // table, "Num" field should be reset. 3944 if (!Dynamic != !IsDynamic) { 3945 Idx = 0; 3946 Dynamic = false; 3947 } 3948 3949 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3950 Field Fields[8] = {0, 8, 17 + Bias, 23 + Bias, 3951 31 + Bias, 38 + Bias, 48 + Bias, 51 + Bias}; 3952 Fields[0].Str = to_string(format_decimal(Idx++, 6)) + ":"; 3953 Fields[1].Str = to_string( 3954 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3955 Fields[2].Str = to_string(format_decimal(Symbol->st_size, 5)); 3956 3957 unsigned char SymbolType = Symbol->getType(); 3958 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3959 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3960 Fields[3].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3961 else 3962 Fields[3].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3963 3964 Fields[4].Str = 3965 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3966 Fields[5].Str = 3967 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3968 if (Symbol->st_other & ~0x3) 3969 Fields[5].Str += 3970 " [<other: " + to_string(format_hex(Symbol->st_other, 2)) + ">]"; 3971 3972 Fields[6].Column += NonVisibilityBitsUsed ? 13 : 0; 3973 Fields[6].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 3974 3975 Fields[7].Str = 3976 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 3977 for (auto &Entry : Fields) 3978 printField(Entry); 3979 OS << "\n"; 3980 } 3981 3982 template <class ELFT> 3983 void GNUStyle<ELFT>::printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, 3984 uint32_t Sym, StringRef StrTable, 3985 uint32_t Bucket) { 3986 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3987 Field Fields[9] = {0, 6, 11, 20 + Bias, 25 + Bias, 3988 34 + Bias, 41 + Bias, 49 + Bias, 53 + Bias}; 3989 Fields[0].Str = to_string(format_decimal(Sym, 5)); 3990 Fields[1].Str = to_string(format_decimal(Bucket, 3)) + ":"; 3991 3992 const auto Symbol = FirstSym + Sym; 3993 Fields[2].Str = to_string( 3994 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3995 Fields[3].Str = to_string(format_decimal(Symbol->st_size, 5)); 3996 3997 unsigned char SymbolType = Symbol->getType(); 3998 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3999 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 4000 Fields[4].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 4001 else 4002 Fields[4].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 4003 4004 Fields[5].Str = 4005 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 4006 Fields[6].Str = 4007 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 4008 Fields[7].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 4009 Fields[8].Str = this->dumper()->getFullSymbolName(Symbol, StrTable, true); 4010 4011 for (auto &Entry : Fields) 4012 printField(Entry); 4013 OS << "\n"; 4014 } 4015 4016 template <class ELFT> 4017 void GNUStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 4018 bool PrintDynamicSymbols) { 4019 if (!PrintSymbols && !PrintDynamicSymbols) 4020 return; 4021 // GNU readelf prints both the .dynsym and .symtab with --symbols. 4022 this->dumper()->printSymbolsHelper(true); 4023 if (PrintSymbols) 4024 this->dumper()->printSymbolsHelper(false); 4025 } 4026 4027 template <class ELFT> void GNUStyle<ELFT>::printHashSymbols(const ELFO *Obj) { 4028 if (this->dumper()->getDynamicStringTable().empty()) 4029 return; 4030 auto StringTable = this->dumper()->getDynamicStringTable(); 4031 auto DynSyms = this->dumper()->dynamic_symbols(); 4032 4033 auto PrintHashTable = [&](const Elf_Hash *SysVHash) { 4034 if (ELFT::Is64Bits) 4035 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4036 else 4037 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4038 OS << "\n"; 4039 4040 auto Buckets = SysVHash->buckets(); 4041 auto Chains = SysVHash->chains(); 4042 for (uint32_t Buc = 0; Buc < SysVHash->nbucket; Buc++) { 4043 if (Buckets[Buc] == ELF::STN_UNDEF) 4044 continue; 4045 std::vector<bool> Visited(SysVHash->nchain); 4046 for (uint32_t Ch = Buckets[Buc]; Ch < SysVHash->nchain; Ch = Chains[Ch]) { 4047 if (Ch == ELF::STN_UNDEF) 4048 break; 4049 4050 if (Visited[Ch]) { 4051 reportWarning( 4052 createError(".hash section is invalid: bucket " + Twine(Ch) + 4053 ": a cycle was detected in the linked chain"), 4054 this->FileName); 4055 break; 4056 } 4057 4058 printHashedSymbol(Obj, &DynSyms[0], Ch, StringTable, Buc); 4059 Visited[Ch] = true; 4060 } 4061 } 4062 }; 4063 4064 if (const Elf_Hash *SysVHash = this->dumper()->getHashTable()) { 4065 OS << "\n Symbol table of .hash for image:\n"; 4066 if (Error E = checkHashTable<ELFT>(Obj, SysVHash)) 4067 this->reportUniqueWarning(std::move(E)); 4068 else 4069 PrintHashTable(SysVHash); 4070 } 4071 4072 // Try printing .gnu.hash 4073 if (auto GnuHash = this->dumper()->getGnuHashTable()) { 4074 OS << "\n Symbol table of .gnu.hash for image:\n"; 4075 if (ELFT::Is64Bits) 4076 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4077 else 4078 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4079 OS << "\n"; 4080 auto Buckets = GnuHash->buckets(); 4081 for (uint32_t Buc = 0; Buc < GnuHash->nbuckets; Buc++) { 4082 if (Buckets[Buc] == ELF::STN_UNDEF) 4083 continue; 4084 uint32_t Index = Buckets[Buc]; 4085 uint32_t GnuHashable = Index - GnuHash->symndx; 4086 // Print whole chain 4087 while (true) { 4088 printHashedSymbol(Obj, &DynSyms[0], Index++, StringTable, Buc); 4089 // Chain ends at symbol with stopper bit 4090 if ((GnuHash->values(DynSyms.size())[GnuHashable++] & 1) == 1) 4091 break; 4092 } 4093 } 4094 } 4095 } 4096 4097 static inline std::string printPhdrFlags(unsigned Flag) { 4098 std::string Str; 4099 Str = (Flag & PF_R) ? "R" : " "; 4100 Str += (Flag & PF_W) ? "W" : " "; 4101 Str += (Flag & PF_X) ? "E" : " "; 4102 return Str; 4103 } 4104 4105 template <class ELFT> 4106 static bool checkTLSSections(const typename ELFT::Phdr &Phdr, 4107 const typename ELFT::Shdr &Sec) { 4108 if (Sec.sh_flags & ELF::SHF_TLS) { 4109 // .tbss must only be shown in the PT_TLS segment. 4110 if (Sec.sh_type == ELF::SHT_NOBITS) 4111 return Phdr.p_type == ELF::PT_TLS; 4112 4113 // SHF_TLS sections are only shown in PT_TLS, PT_LOAD or PT_GNU_RELRO 4114 // segments. 4115 return (Phdr.p_type == ELF::PT_TLS) || (Phdr.p_type == ELF::PT_LOAD) || 4116 (Phdr.p_type == ELF::PT_GNU_RELRO); 4117 } 4118 4119 // PT_TLS must only have SHF_TLS sections. 4120 return Phdr.p_type != ELF::PT_TLS; 4121 } 4122 4123 template <class ELFT> 4124 static bool checkOffsets(const typename ELFT::Phdr &Phdr, 4125 const typename ELFT::Shdr &Sec) { 4126 // SHT_NOBITS sections don't need to have an offset inside the segment. 4127 if (Sec.sh_type == ELF::SHT_NOBITS) 4128 return true; 4129 4130 if (Sec.sh_offset < Phdr.p_offset) 4131 return false; 4132 4133 // Only non-empty sections can be at the end of a segment. 4134 if (Sec.sh_size == 0) 4135 return (Sec.sh_offset + 1 <= Phdr.p_offset + Phdr.p_filesz); 4136 return Sec.sh_offset + Sec.sh_size <= Phdr.p_offset + Phdr.p_filesz; 4137 } 4138 4139 // Check that an allocatable section belongs to a virtual address 4140 // space of a segment. 4141 template <class ELFT> 4142 static bool checkVMA(const typename ELFT::Phdr &Phdr, 4143 const typename ELFT::Shdr &Sec) { 4144 if (!(Sec.sh_flags & ELF::SHF_ALLOC)) 4145 return true; 4146 4147 if (Sec.sh_addr < Phdr.p_vaddr) 4148 return false; 4149 4150 bool IsTbss = 4151 (Sec.sh_type == ELF::SHT_NOBITS) && ((Sec.sh_flags & ELF::SHF_TLS) != 0); 4152 // .tbss is special, it only has memory in PT_TLS and has NOBITS properties. 4153 bool IsTbssInNonTLS = IsTbss && Phdr.p_type != ELF::PT_TLS; 4154 // Only non-empty sections can be at the end of a segment. 4155 if (Sec.sh_size == 0 || IsTbssInNonTLS) 4156 return Sec.sh_addr + 1 <= Phdr.p_vaddr + Phdr.p_memsz; 4157 return Sec.sh_addr + Sec.sh_size <= Phdr.p_vaddr + Phdr.p_memsz; 4158 } 4159 4160 template <class ELFT> 4161 static bool checkPTDynamic(const typename ELFT::Phdr &Phdr, 4162 const typename ELFT::Shdr &Sec) { 4163 if (Phdr.p_type != ELF::PT_DYNAMIC || Phdr.p_memsz == 0 || Sec.sh_size != 0) 4164 return true; 4165 4166 // We get here when we have an empty section. Only non-empty sections can be 4167 // at the start or at the end of PT_DYNAMIC. 4168 // Is section within the phdr both based on offset and VMA? 4169 bool CheckOffset = (Sec.sh_type == ELF::SHT_NOBITS) || 4170 (Sec.sh_offset > Phdr.p_offset && 4171 Sec.sh_offset < Phdr.p_offset + Phdr.p_filesz); 4172 bool CheckVA = !(Sec.sh_flags & ELF::SHF_ALLOC) || 4173 (Sec.sh_addr > Phdr.p_vaddr && Sec.sh_addr < Phdr.p_memsz); 4174 return CheckOffset && CheckVA; 4175 } 4176 4177 template <class ELFT> 4178 void GNUStyle<ELFT>::printProgramHeaders( 4179 const ELFO *Obj, bool PrintProgramHeaders, 4180 cl::boolOrDefault PrintSectionMapping) { 4181 if (PrintProgramHeaders) 4182 printProgramHeaders(Obj); 4183 4184 // Display the section mapping along with the program headers, unless 4185 // -section-mapping is explicitly set to false. 4186 if (PrintSectionMapping != cl::BOU_FALSE) 4187 printSectionMapping(Obj); 4188 } 4189 4190 template <class ELFT> 4191 void GNUStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 4192 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 4193 const Elf_Ehdr *Header = Obj->getHeader(); 4194 Field Fields[8] = {2, 17, 26, 37 + Bias, 4195 48 + Bias, 56 + Bias, 64 + Bias, 68 + Bias}; 4196 OS << "\nElf file type is " 4197 << printEnum(Header->e_type, makeArrayRef(ElfObjectFileType)) << "\n" 4198 << "Entry point " << format_hex(Header->e_entry, 3) << "\n" 4199 << "There are " << Header->e_phnum << " program headers," 4200 << " starting at offset " << Header->e_phoff << "\n\n" 4201 << "Program Headers:\n"; 4202 if (ELFT::Is64Bits) 4203 OS << " Type Offset VirtAddr PhysAddr " 4204 << " FileSiz MemSiz Flg Align\n"; 4205 else 4206 OS << " Type Offset VirtAddr PhysAddr FileSiz " 4207 << "MemSiz Flg Align\n"; 4208 4209 unsigned Width = ELFT::Is64Bits ? 18 : 10; 4210 unsigned SizeWidth = ELFT::Is64Bits ? 8 : 7; 4211 for (const auto &Phdr : 4212 unwrapOrError(this->FileName, Obj->program_headers())) { 4213 Fields[0].Str = getElfPtType(Header->e_machine, Phdr.p_type); 4214 Fields[1].Str = to_string(format_hex(Phdr.p_offset, 8)); 4215 Fields[2].Str = to_string(format_hex(Phdr.p_vaddr, Width)); 4216 Fields[3].Str = to_string(format_hex(Phdr.p_paddr, Width)); 4217 Fields[4].Str = to_string(format_hex(Phdr.p_filesz, SizeWidth)); 4218 Fields[5].Str = to_string(format_hex(Phdr.p_memsz, SizeWidth)); 4219 Fields[6].Str = printPhdrFlags(Phdr.p_flags); 4220 Fields[7].Str = to_string(format_hex(Phdr.p_align, 1)); 4221 for (auto Field : Fields) 4222 printField(Field); 4223 if (Phdr.p_type == ELF::PT_INTERP) { 4224 OS << "\n"; 4225 auto ReportBadInterp = [&](const Twine &Msg) { 4226 reportWarning( 4227 createError("unable to read program interpreter name at offset 0x" + 4228 Twine::utohexstr(Phdr.p_offset) + ": " + Msg), 4229 this->FileName); 4230 }; 4231 4232 if (Phdr.p_offset >= Obj->getBufSize()) { 4233 ReportBadInterp("it goes past the end of the file (0x" + 4234 Twine::utohexstr(Obj->getBufSize()) + ")"); 4235 continue; 4236 } 4237 4238 const char *Data = 4239 reinterpret_cast<const char *>(Obj->base()) + Phdr.p_offset; 4240 size_t MaxSize = Obj->getBufSize() - Phdr.p_offset; 4241 size_t Len = strnlen(Data, MaxSize); 4242 if (Len == MaxSize) { 4243 ReportBadInterp("it is not null-terminated"); 4244 continue; 4245 } 4246 4247 OS << " [Requesting program interpreter: "; 4248 OS << StringRef(Data, Len) << "]"; 4249 } 4250 OS << "\n"; 4251 } 4252 } 4253 4254 template <class ELFT> 4255 void GNUStyle<ELFT>::printSectionMapping(const ELFO *Obj) { 4256 OS << "\n Section to Segment mapping:\n Segment Sections...\n"; 4257 DenseSet<const Elf_Shdr *> BelongsToSegment; 4258 int Phnum = 0; 4259 for (const Elf_Phdr &Phdr : 4260 unwrapOrError(this->FileName, Obj->program_headers())) { 4261 std::string Sections; 4262 OS << format(" %2.2d ", Phnum++); 4263 // Check if each section is in a segment and then print mapping. 4264 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4265 if (Sec.sh_type == ELF::SHT_NULL) 4266 continue; 4267 4268 // readelf additionally makes sure it does not print zero sized sections 4269 // at end of segments and for PT_DYNAMIC both start and end of section 4270 // .tbss must only be shown in PT_TLS section. 4271 if (checkTLSSections<ELFT>(Phdr, Sec) && checkOffsets<ELFT>(Phdr, Sec) && 4272 checkVMA<ELFT>(Phdr, Sec) && checkPTDynamic<ELFT>(Phdr, Sec)) { 4273 Sections += 4274 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + 4275 " "; 4276 BelongsToSegment.insert(&Sec); 4277 } 4278 } 4279 OS << Sections << "\n"; 4280 OS.flush(); 4281 } 4282 4283 // Display sections that do not belong to a segment. 4284 std::string Sections; 4285 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4286 if (BelongsToSegment.find(&Sec) == BelongsToSegment.end()) 4287 Sections += 4288 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + ' '; 4289 } 4290 if (!Sections.empty()) { 4291 OS << " None " << Sections << '\n'; 4292 OS.flush(); 4293 } 4294 } 4295 4296 namespace { 4297 template <class ELFT> struct RelSymbol { 4298 const typename ELFT::Sym *Sym; 4299 std::string Name; 4300 }; 4301 4302 template <class ELFT> 4303 RelSymbol<ELFT> getSymbolForReloc(const ELFFile<ELFT> *Obj, StringRef FileName, 4304 const ELFDumper<ELFT> *Dumper, 4305 const typename ELFT::Rela &Reloc) { 4306 uint32_t SymIndex = Reloc.getSymbol(Obj->isMips64EL()); 4307 auto WarnAndReturn = [&](const typename ELFT::Sym *Sym, 4308 const Twine &Reason) -> RelSymbol<ELFT> { 4309 reportWarning( 4310 createError("unable to get name of the dynamic symbol with index " + 4311 Twine(SymIndex) + ": " + Reason), 4312 FileName); 4313 return {Sym, "<corrupt>"}; 4314 }; 4315 4316 ArrayRef<typename ELFT::Sym> Symbols = Dumper->dynamic_symbols(); 4317 const typename ELFT::Sym *FirstSym = Symbols.begin(); 4318 if (!FirstSym) 4319 return WarnAndReturn(nullptr, "no dynamic symbol table found"); 4320 4321 // We might have an object without a section header. In this case the size of 4322 // Symbols is zero, because there is no way to know the size of the dynamic 4323 // table. We should allow this case and not print a warning. 4324 if (!Symbols.empty() && SymIndex >= Symbols.size()) 4325 return WarnAndReturn( 4326 nullptr, 4327 "index is greater than or equal to the number of dynamic symbols (" + 4328 Twine(Symbols.size()) + ")"); 4329 4330 const typename ELFT::Sym *Sym = FirstSym + SymIndex; 4331 Expected<StringRef> ErrOrName = Sym->getName(Dumper->getDynamicStringTable()); 4332 if (!ErrOrName) 4333 return WarnAndReturn(Sym, toString(ErrOrName.takeError())); 4334 4335 return {Sym == FirstSym ? nullptr : Sym, maybeDemangle(*ErrOrName)}; 4336 } 4337 } // namespace 4338 4339 template <class ELFT> 4340 void GNUStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela R, 4341 bool IsRela) { 4342 RelSymbol<ELFT> S = getSymbolForReloc(Obj, this->FileName, this->dumper(), R); 4343 printRelocation(Obj, S.Sym, S.Name, R, IsRela); 4344 } 4345 4346 template <class ELFT> 4347 static size_t getMaxDynamicTagSize(const ELFFile<ELFT> *Obj, 4348 typename ELFT::DynRange Tags) { 4349 size_t Max = 0; 4350 for (const typename ELFT::Dyn &Dyn : Tags) 4351 Max = std::max(Max, Obj->getDynamicTagAsString(Dyn.d_tag).size()); 4352 return Max; 4353 } 4354 4355 template <class ELFT> void GNUStyle<ELFT>::printDynamic(const ELFO *Obj) { 4356 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 4357 if (Table.empty()) 4358 return; 4359 4360 const DynRegionInfo &DynamicTableRegion = 4361 this->dumper()->getDynamicTableRegion(); 4362 4363 OS << "Dynamic section at offset " 4364 << format_hex(reinterpret_cast<const uint8_t *>(DynamicTableRegion.Addr) - 4365 Obj->base(), 4366 1) 4367 << " contains " << Table.size() << " entries:\n"; 4368 4369 // The type name is surrounded with round brackets, hence add 2. 4370 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table) + 2; 4371 // The "Name/Value" column should be indented from the "Type" column by N 4372 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 4373 // space (1) = 3. 4374 OS << " Tag" + std::string(ELFT::Is64Bits ? 16 : 8, ' ') + "Type" 4375 << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 4376 4377 std::string ValueFmt = " %-" + std::to_string(MaxTagSize) + "s "; 4378 for (auto Entry : Table) { 4379 uintX_t Tag = Entry.getTag(); 4380 std::string Type = 4381 std::string("(") + Obj->getDynamicTagAsString(Tag).c_str() + ")"; 4382 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 4383 OS << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10) 4384 << format(ValueFmt.c_str(), Type.c_str()) << Value << "\n"; 4385 } 4386 } 4387 4388 template <class ELFT> 4389 void GNUStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 4390 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 4391 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 4392 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 4393 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 4394 if (DynRelaRegion.Size > 0) { 4395 OS << "\n'RELA' relocation section at offset " 4396 << format_hex(reinterpret_cast<const uint8_t *>(DynRelaRegion.Addr) - 4397 Obj->base(), 4398 1) 4399 << " contains " << DynRelaRegion.Size << " bytes:\n"; 4400 printRelocHeader(ELF::SHT_RELA); 4401 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 4402 printDynamicRelocation(Obj, Rela, true); 4403 } 4404 if (DynRelRegion.Size > 0) { 4405 OS << "\n'REL' relocation section at offset " 4406 << format_hex(reinterpret_cast<const uint8_t *>(DynRelRegion.Addr) - 4407 Obj->base(), 4408 1) 4409 << " contains " << DynRelRegion.Size << " bytes:\n"; 4410 printRelocHeader(ELF::SHT_REL); 4411 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 4412 Elf_Rela Rela; 4413 Rela.r_offset = Rel.r_offset; 4414 Rela.r_info = Rel.r_info; 4415 Rela.r_addend = 0; 4416 printDynamicRelocation(Obj, Rela, false); 4417 } 4418 } 4419 if (DynRelrRegion.Size > 0) { 4420 OS << "\n'RELR' relocation section at offset " 4421 << format_hex(reinterpret_cast<const uint8_t *>(DynRelrRegion.Addr) - 4422 Obj->base(), 4423 1) 4424 << " contains " << DynRelrRegion.Size << " bytes:\n"; 4425 printRelocHeader(ELF::SHT_REL); 4426 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 4427 std::vector<Elf_Rela> RelrRelas = 4428 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 4429 for (const Elf_Rela &Rela : RelrRelas) { 4430 printDynamicRelocation(Obj, Rela, false); 4431 } 4432 } 4433 if (DynPLTRelRegion.Size) { 4434 OS << "\n'PLT' relocation section at offset " 4435 << format_hex(reinterpret_cast<const uint8_t *>(DynPLTRelRegion.Addr) - 4436 Obj->base(), 4437 1) 4438 << " contains " << DynPLTRelRegion.Size << " bytes:\n"; 4439 } 4440 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) { 4441 printRelocHeader(ELF::SHT_RELA); 4442 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 4443 printDynamicRelocation(Obj, Rela, true); 4444 } else { 4445 printRelocHeader(ELF::SHT_REL); 4446 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 4447 Elf_Rela Rela; 4448 Rela.r_offset = Rel.r_offset; 4449 Rela.r_info = Rel.r_info; 4450 Rela.r_addend = 0; 4451 printDynamicRelocation(Obj, Rela, false); 4452 } 4453 } 4454 } 4455 4456 template <class ELFT> 4457 void GNUStyle<ELFT>::printGNUVersionSectionProlog( 4458 const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec, 4459 const Twine &Label, unsigned EntriesNum) { 4460 StringRef SecName = unwrapOrError(this->FileName, Obj->getSectionName(Sec)); 4461 OS << Label << " section '" << SecName << "' " 4462 << "contains " << EntriesNum << " entries:\n"; 4463 4464 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4465 StringRef SymTabName = "<corrupt>"; 4466 4467 Expected<const typename ELFT::Shdr *> SymTabOrErr = 4468 Obj->getSection(Sec->sh_link); 4469 if (SymTabOrErr) 4470 SymTabName = 4471 unwrapOrError(this->FileName, Obj->getSectionName(*SymTabOrErr)); 4472 else 4473 this->reportUniqueWarning( 4474 createError("invalid section linked to " + 4475 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 4476 Sec->sh_type) + 4477 " section with index " + Twine(SecNdx) + ": " + 4478 toString(SymTabOrErr.takeError()))); 4479 4480 OS << " Addr: " << format_hex_no_prefix(Sec->sh_addr, 16) 4481 << " Offset: " << format_hex(Sec->sh_offset, 8) 4482 << " Link: " << Sec->sh_link << " (" << SymTabName << ")\n"; 4483 } 4484 4485 template <class ELFT> 4486 void GNUStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 4487 const Elf_Shdr *Sec) { 4488 if (!Sec) 4489 return; 4490 4491 printGNUVersionSectionProlog(Obj, Sec, "Version symbols", 4492 Sec->sh_size / sizeof(Elf_Versym)); 4493 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 4494 this->dumper()->getVersionTable(Sec, /*SymTab=*/nullptr, 4495 /*StrTab=*/nullptr); 4496 if (!VerTableOrErr) { 4497 this->reportUniqueWarning(VerTableOrErr.takeError()); 4498 return; 4499 } 4500 4501 ArrayRef<Elf_Versym> VerTable = *VerTableOrErr; 4502 std::vector<StringRef> Versions; 4503 for (size_t I = 0, E = VerTable.size(); I < E; ++I) { 4504 unsigned Ndx = VerTable[I].vs_index; 4505 if (Ndx == VER_NDX_LOCAL || Ndx == VER_NDX_GLOBAL) { 4506 Versions.emplace_back(Ndx == VER_NDX_LOCAL ? "*local*" : "*global*"); 4507 continue; 4508 } 4509 4510 bool IsDefault; 4511 Expected<StringRef> NameOrErr = 4512 this->dumper()->getSymbolVersionByIndex(Ndx, IsDefault); 4513 if (!NameOrErr) { 4514 if (!NameOrErr) { 4515 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4516 this->reportUniqueWarning(createError( 4517 "unable to get a version for entry " + Twine(I) + 4518 " of SHT_GNU_versym section with index " + Twine(SecNdx) + ": " + 4519 toString(NameOrErr.takeError()))); 4520 } 4521 Versions.emplace_back("<corrupt>"); 4522 continue; 4523 } 4524 Versions.emplace_back(*NameOrErr); 4525 } 4526 4527 // readelf prints 4 entries per line. 4528 uint64_t Entries = VerTable.size(); 4529 for (uint64_t VersymRow = 0; VersymRow < Entries; VersymRow += 4) { 4530 OS << " " << format_hex_no_prefix(VersymRow, 3) << ":"; 4531 for (uint64_t I = 0; (I < 4) && (I + VersymRow) < Entries; ++I) { 4532 unsigned Ndx = VerTable[VersymRow + I].vs_index; 4533 OS << format("%4x%c", Ndx & VERSYM_VERSION, 4534 Ndx & VERSYM_HIDDEN ? 'h' : ' '); 4535 OS << left_justify("(" + std::string(Versions[VersymRow + I]) + ")", 13); 4536 } 4537 OS << '\n'; 4538 } 4539 OS << '\n'; 4540 } 4541 4542 static std::string versionFlagToString(unsigned Flags) { 4543 if (Flags == 0) 4544 return "none"; 4545 4546 std::string Ret; 4547 auto AddFlag = [&Ret, &Flags](unsigned Flag, StringRef Name) { 4548 if (!(Flags & Flag)) 4549 return; 4550 if (!Ret.empty()) 4551 Ret += " | "; 4552 Ret += Name; 4553 Flags &= ~Flag; 4554 }; 4555 4556 AddFlag(VER_FLG_BASE, "BASE"); 4557 AddFlag(VER_FLG_WEAK, "WEAK"); 4558 AddFlag(VER_FLG_INFO, "INFO"); 4559 AddFlag(~0, "<unknown>"); 4560 return Ret; 4561 } 4562 4563 template <class ELFT> 4564 void GNUStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 4565 const Elf_Shdr *Sec) { 4566 if (!Sec) 4567 return; 4568 4569 printGNUVersionSectionProlog(Obj, Sec, "Version definition", Sec->sh_info); 4570 4571 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 4572 if (!V) { 4573 this->reportUniqueWarning(V.takeError()); 4574 return; 4575 } 4576 4577 for (const VerDef &Def : *V) { 4578 OS << format(" 0x%04x: Rev: %u Flags: %s Index: %u Cnt: %u Name: %s\n", 4579 Def.Offset, Def.Version, 4580 versionFlagToString(Def.Flags).c_str(), Def.Ndx, Def.Cnt, 4581 Def.Name.data()); 4582 unsigned I = 0; 4583 for (const VerdAux &Aux : Def.AuxV) 4584 OS << format(" 0x%04x: Parent %u: %s\n", Aux.Offset, ++I, 4585 Aux.Name.data()); 4586 } 4587 4588 OS << '\n'; 4589 } 4590 4591 template <class ELFT> 4592 void GNUStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 4593 const Elf_Shdr *Sec) { 4594 if (!Sec) 4595 return; 4596 4597 unsigned VerneedNum = Sec->sh_info; 4598 printGNUVersionSectionProlog(Obj, Sec, "Version needs", VerneedNum); 4599 4600 Expected<std::vector<VerNeed>> V = 4601 this->dumper()->getVersionDependencies(Sec); 4602 if (!V) { 4603 this->reportUniqueWarning(V.takeError()); 4604 return; 4605 } 4606 4607 for (const VerNeed &VN : *V) { 4608 OS << format(" 0x%04x: Version: %u File: %s Cnt: %u\n", VN.Offset, 4609 VN.Version, VN.File.data(), VN.Cnt); 4610 for (const VernAux &Aux : VN.AuxV) 4611 OS << format(" 0x%04x: Name: %s Flags: %s Version: %u\n", Aux.Offset, 4612 Aux.Name.data(), versionFlagToString(Aux.Flags).c_str(), 4613 Aux.Other); 4614 } 4615 OS << '\n'; 4616 } 4617 4618 template <class ELFT> 4619 void GNUStyle<ELFT>::printHashHistogram(const Elf_Hash &HashTable) { 4620 size_t NBucket = HashTable.nbucket; 4621 size_t NChain = HashTable.nchain; 4622 ArrayRef<Elf_Word> Buckets = HashTable.buckets(); 4623 ArrayRef<Elf_Word> Chains = HashTable.chains(); 4624 size_t TotalSyms = 0; 4625 // If hash table is correct, we have at least chains with 0 length 4626 size_t MaxChain = 1; 4627 size_t CumulativeNonZero = 0; 4628 4629 if (NChain == 0 || NBucket == 0) 4630 return; 4631 4632 std::vector<size_t> ChainLen(NBucket, 0); 4633 // Go over all buckets and and note chain lengths of each bucket (total 4634 // unique chain lengths). 4635 for (size_t B = 0; B < NBucket; B++) { 4636 std::vector<bool> Visited(NChain); 4637 for (size_t C = Buckets[B]; C < NChain; C = Chains[C]) { 4638 if (C == ELF::STN_UNDEF) 4639 break; 4640 if (Visited[C]) { 4641 reportWarning(createError(".hash section is invalid: bucket " + 4642 Twine(C) + 4643 ": a cycle was detected in the linked chain"), 4644 this->FileName); 4645 break; 4646 } 4647 Visited[C] = true; 4648 if (MaxChain <= ++ChainLen[B]) 4649 MaxChain++; 4650 } 4651 TotalSyms += ChainLen[B]; 4652 } 4653 4654 if (!TotalSyms) 4655 return; 4656 4657 std::vector<size_t> Count(MaxChain, 0); 4658 // Count how long is the chain for each bucket 4659 for (size_t B = 0; B < NBucket; B++) 4660 ++Count[ChainLen[B]]; 4661 // Print Number of buckets with each chain lengths and their cumulative 4662 // coverage of the symbols 4663 OS << "Histogram for bucket list length (total of " << NBucket 4664 << " buckets)\n" 4665 << " Length Number % of total Coverage\n"; 4666 for (size_t I = 0; I < MaxChain; I++) { 4667 CumulativeNonZero += Count[I] * I; 4668 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4669 (Count[I] * 100.0) / NBucket, 4670 (CumulativeNonZero * 100.0) / TotalSyms); 4671 } 4672 } 4673 4674 template <class ELFT> 4675 void GNUStyle<ELFT>::printGnuHashHistogram(const Elf_GnuHash &GnuHashTable) { 4676 Expected<ArrayRef<Elf_Word>> ChainsOrErr = getGnuHashTableChains<ELFT>( 4677 this->dumper()->getDynSymRegion(), &GnuHashTable); 4678 if (!ChainsOrErr) { 4679 this->reportUniqueWarning( 4680 createError("unable to print the GNU hash table histogram: " + 4681 toString(ChainsOrErr.takeError()))); 4682 return; 4683 } 4684 4685 ArrayRef<Elf_Word> Chains = *ChainsOrErr; 4686 size_t Symndx = GnuHashTable.symndx; 4687 size_t TotalSyms = 0; 4688 size_t MaxChain = 1; 4689 size_t CumulativeNonZero = 0; 4690 4691 size_t NBucket = GnuHashTable.nbuckets; 4692 if (Chains.empty() || NBucket == 0) 4693 return; 4694 4695 ArrayRef<Elf_Word> Buckets = GnuHashTable.buckets(); 4696 std::vector<size_t> ChainLen(NBucket, 0); 4697 for (size_t B = 0; B < NBucket; B++) { 4698 if (!Buckets[B]) 4699 continue; 4700 size_t Len = 1; 4701 for (size_t C = Buckets[B] - Symndx; 4702 C < Chains.size() && (Chains[C] & 1) == 0; C++) 4703 if (MaxChain < ++Len) 4704 MaxChain++; 4705 ChainLen[B] = Len; 4706 TotalSyms += Len; 4707 } 4708 MaxChain++; 4709 4710 if (!TotalSyms) 4711 return; 4712 4713 std::vector<size_t> Count(MaxChain, 0); 4714 for (size_t B = 0; B < NBucket; B++) 4715 ++Count[ChainLen[B]]; 4716 // Print Number of buckets with each chain lengths and their cumulative 4717 // coverage of the symbols 4718 OS << "Histogram for `.gnu.hash' bucket list length (total of " << NBucket 4719 << " buckets)\n" 4720 << " Length Number % of total Coverage\n"; 4721 for (size_t I = 0; I < MaxChain; I++) { 4722 CumulativeNonZero += Count[I] * I; 4723 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4724 (Count[I] * 100.0) / NBucket, 4725 (CumulativeNonZero * 100.0) / TotalSyms); 4726 } 4727 } 4728 4729 // Hash histogram shows statistics of how efficient the hash was for the 4730 // dynamic symbol table. The table shows the number of hash buckets for 4731 // different lengths of chains as an absolute number and percentage of the total 4732 // buckets, and the cumulative coverage of symbols for each set of buckets. 4733 template <class ELFT> 4734 void GNUStyle<ELFT>::printHashHistograms(const ELFFile<ELFT> *Obj) { 4735 // Print histogram for the .hash section. 4736 if (const Elf_Hash *HashTable = this->dumper()->getHashTable()) { 4737 if (Error E = checkHashTable<ELFT>(Obj, HashTable)) 4738 this->reportUniqueWarning(std::move(E)); 4739 else 4740 printHashHistogram(*HashTable); 4741 } 4742 4743 // Print histogram for the .gnu.hash section. 4744 if (const Elf_GnuHash *GnuHashTable = this->dumper()->getGnuHashTable()) { 4745 if (Error E = checkGNUHashTable<ELFT>(Obj, GnuHashTable)) 4746 this->reportUniqueWarning(std::move(E)); 4747 else 4748 printGnuHashHistogram(*GnuHashTable); 4749 } 4750 } 4751 4752 template <class ELFT> 4753 void GNUStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 4754 OS << "GNUStyle::printCGProfile not implemented\n"; 4755 } 4756 4757 template <class ELFT> 4758 void GNUStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 4759 reportError(createError("--addrsig: not implemented"), this->FileName); 4760 } 4761 4762 static StringRef getGenericNoteTypeName(const uint32_t NT) { 4763 static const struct { 4764 uint32_t ID; 4765 const char *Name; 4766 } Notes[] = { 4767 {ELF::NT_VERSION, "NT_VERSION (version)"}, 4768 {ELF::NT_ARCH, "NT_ARCH (architecture)"}, 4769 {ELF::NT_GNU_BUILD_ATTRIBUTE_OPEN, "OPEN"}, 4770 {ELF::NT_GNU_BUILD_ATTRIBUTE_FUNC, "func"}, 4771 }; 4772 4773 for (const auto &Note : Notes) 4774 if (Note.ID == NT) 4775 return Note.Name; 4776 4777 return ""; 4778 } 4779 4780 static StringRef getCoreNoteTypeName(const uint32_t NT) { 4781 static const struct { 4782 uint32_t ID; 4783 const char *Name; 4784 } Notes[] = { 4785 {ELF::NT_PRSTATUS, "NT_PRSTATUS (prstatus structure)"}, 4786 {ELF::NT_FPREGSET, "NT_FPREGSET (floating point registers)"}, 4787 {ELF::NT_PRPSINFO, "NT_PRPSINFO (prpsinfo structure)"}, 4788 {ELF::NT_TASKSTRUCT, "NT_TASKSTRUCT (task structure)"}, 4789 {ELF::NT_AUXV, "NT_AUXV (auxiliary vector)"}, 4790 {ELF::NT_PSTATUS, "NT_PSTATUS (pstatus structure)"}, 4791 {ELF::NT_FPREGS, "NT_FPREGS (floating point registers)"}, 4792 {ELF::NT_PSINFO, "NT_PSINFO (psinfo structure)"}, 4793 {ELF::NT_LWPSTATUS, "NT_LWPSTATUS (lwpstatus_t structure)"}, 4794 {ELF::NT_LWPSINFO, "NT_LWPSINFO (lwpsinfo_t structure)"}, 4795 {ELF::NT_WIN32PSTATUS, "NT_WIN32PSTATUS (win32_pstatus structure)"}, 4796 4797 {ELF::NT_PPC_VMX, "NT_PPC_VMX (ppc Altivec registers)"}, 4798 {ELF::NT_PPC_VSX, "NT_PPC_VSX (ppc VSX registers)"}, 4799 {ELF::NT_PPC_TAR, "NT_PPC_TAR (ppc TAR register)"}, 4800 {ELF::NT_PPC_PPR, "NT_PPC_PPR (ppc PPR register)"}, 4801 {ELF::NT_PPC_DSCR, "NT_PPC_DSCR (ppc DSCR register)"}, 4802 {ELF::NT_PPC_EBB, "NT_PPC_EBB (ppc EBB registers)"}, 4803 {ELF::NT_PPC_PMU, "NT_PPC_PMU (ppc PMU registers)"}, 4804 {ELF::NT_PPC_TM_CGPR, "NT_PPC_TM_CGPR (ppc checkpointed GPR registers)"}, 4805 {ELF::NT_PPC_TM_CFPR, 4806 "NT_PPC_TM_CFPR (ppc checkpointed floating point registers)"}, 4807 {ELF::NT_PPC_TM_CVMX, 4808 "NT_PPC_TM_CVMX (ppc checkpointed Altivec registers)"}, 4809 {ELF::NT_PPC_TM_CVSX, "NT_PPC_TM_CVSX (ppc checkpointed VSX registers)"}, 4810 {ELF::NT_PPC_TM_SPR, "NT_PPC_TM_SPR (ppc TM special purpose registers)"}, 4811 {ELF::NT_PPC_TM_CTAR, "NT_PPC_TM_CTAR (ppc checkpointed TAR register)"}, 4812 {ELF::NT_PPC_TM_CPPR, "NT_PPC_TM_CPPR (ppc checkpointed PPR register)"}, 4813 {ELF::NT_PPC_TM_CDSCR, 4814 "NT_PPC_TM_CDSCR (ppc checkpointed DSCR register)"}, 4815 4816 {ELF::NT_386_TLS, "NT_386_TLS (x86 TLS information)"}, 4817 {ELF::NT_386_IOPERM, "NT_386_IOPERM (x86 I/O permissions)"}, 4818 {ELF::NT_X86_XSTATE, "NT_X86_XSTATE (x86 XSAVE extended state)"}, 4819 4820 {ELF::NT_S390_HIGH_GPRS, 4821 "NT_S390_HIGH_GPRS (s390 upper register halves)"}, 4822 {ELF::NT_S390_TIMER, "NT_S390_TIMER (s390 timer register)"}, 4823 {ELF::NT_S390_TODCMP, "NT_S390_TODCMP (s390 TOD comparator register)"}, 4824 {ELF::NT_S390_TODPREG, 4825 "NT_S390_TODPREG (s390 TOD programmable register)"}, 4826 {ELF::NT_S390_CTRS, "NT_S390_CTRS (s390 control registers)"}, 4827 {ELF::NT_S390_PREFIX, "NT_S390_PREFIX (s390 prefix register)"}, 4828 {ELF::NT_S390_LAST_BREAK, 4829 "NT_S390_LAST_BREAK (s390 last breaking event address)"}, 4830 {ELF::NT_S390_SYSTEM_CALL, 4831 "NT_S390_SYSTEM_CALL (s390 system call restart data)"}, 4832 {ELF::NT_S390_TDB, "NT_S390_TDB (s390 transaction diagnostic block)"}, 4833 {ELF::NT_S390_VXRS_LOW, 4834 "NT_S390_VXRS_LOW (s390 vector registers 0-15 upper half)"}, 4835 {ELF::NT_S390_VXRS_HIGH, 4836 "NT_S390_VXRS_HIGH (s390 vector registers 16-31)"}, 4837 {ELF::NT_S390_GS_CB, "NT_S390_GS_CB (s390 guarded-storage registers)"}, 4838 {ELF::NT_S390_GS_BC, 4839 "NT_S390_GS_BC (s390 guarded-storage broadcast control)"}, 4840 4841 {ELF::NT_ARM_VFP, "NT_ARM_VFP (arm VFP registers)"}, 4842 {ELF::NT_ARM_TLS, "NT_ARM_TLS (AArch TLS registers)"}, 4843 {ELF::NT_ARM_HW_BREAK, 4844 "NT_ARM_HW_BREAK (AArch hardware breakpoint registers)"}, 4845 {ELF::NT_ARM_HW_WATCH, 4846 "NT_ARM_HW_WATCH (AArch hardware watchpoint registers)"}, 4847 4848 {ELF::NT_FILE, "NT_FILE (mapped files)"}, 4849 {ELF::NT_PRXFPREG, "NT_PRXFPREG (user_xfpregs structure)"}, 4850 {ELF::NT_SIGINFO, "NT_SIGINFO (siginfo_t data)"}, 4851 }; 4852 4853 for (const auto &Note : Notes) 4854 if (Note.ID == NT) 4855 return Note.Name; 4856 4857 return ""; 4858 } 4859 4860 static std::string getGNUNoteTypeName(const uint32_t NT) { 4861 static const struct { 4862 uint32_t ID; 4863 const char *Name; 4864 } Notes[] = { 4865 {ELF::NT_GNU_ABI_TAG, "NT_GNU_ABI_TAG (ABI version tag)"}, 4866 {ELF::NT_GNU_HWCAP, "NT_GNU_HWCAP (DSO-supplied software HWCAP info)"}, 4867 {ELF::NT_GNU_BUILD_ID, "NT_GNU_BUILD_ID (unique build ID bitstring)"}, 4868 {ELF::NT_GNU_GOLD_VERSION, "NT_GNU_GOLD_VERSION (gold version)"}, 4869 {ELF::NT_GNU_PROPERTY_TYPE_0, "NT_GNU_PROPERTY_TYPE_0 (property note)"}, 4870 }; 4871 4872 for (const auto &Note : Notes) 4873 if (Note.ID == NT) 4874 return std::string(Note.Name); 4875 4876 std::string string; 4877 raw_string_ostream OS(string); 4878 OS << format("Unknown note type (0x%08x)", NT); 4879 return OS.str(); 4880 } 4881 4882 static std::string getFreeBSDNoteTypeName(const uint32_t NT) { 4883 static const struct { 4884 uint32_t ID; 4885 const char *Name; 4886 } Notes[] = { 4887 {ELF::NT_FREEBSD_THRMISC, "NT_THRMISC (thrmisc structure)"}, 4888 {ELF::NT_FREEBSD_PROCSTAT_PROC, "NT_PROCSTAT_PROC (proc data)"}, 4889 {ELF::NT_FREEBSD_PROCSTAT_FILES, "NT_PROCSTAT_FILES (files data)"}, 4890 {ELF::NT_FREEBSD_PROCSTAT_VMMAP, "NT_PROCSTAT_VMMAP (vmmap data)"}, 4891 {ELF::NT_FREEBSD_PROCSTAT_GROUPS, "NT_PROCSTAT_GROUPS (groups data)"}, 4892 {ELF::NT_FREEBSD_PROCSTAT_UMASK, "NT_PROCSTAT_UMASK (umask data)"}, 4893 {ELF::NT_FREEBSD_PROCSTAT_RLIMIT, "NT_PROCSTAT_RLIMIT (rlimit data)"}, 4894 {ELF::NT_FREEBSD_PROCSTAT_OSREL, "NT_PROCSTAT_OSREL (osreldate data)"}, 4895 {ELF::NT_FREEBSD_PROCSTAT_PSSTRINGS, 4896 "NT_PROCSTAT_PSSTRINGS (ps_strings data)"}, 4897 {ELF::NT_FREEBSD_PROCSTAT_AUXV, "NT_PROCSTAT_AUXV (auxv data)"}, 4898 }; 4899 4900 for (const auto &Note : Notes) 4901 if (Note.ID == NT) 4902 return std::string(Note.Name); 4903 4904 std::string string; 4905 raw_string_ostream OS(string); 4906 OS << format("Unknown note type (0x%08x)", NT); 4907 return OS.str(); 4908 } 4909 4910 static std::string getAMDNoteTypeName(const uint32_t NT) { 4911 static const struct { 4912 uint32_t ID; 4913 const char *Name; 4914 } Notes[] = {{ELF::NT_AMD_AMDGPU_HSA_METADATA, 4915 "NT_AMD_AMDGPU_HSA_METADATA (HSA Metadata)"}, 4916 {ELF::NT_AMD_AMDGPU_ISA, "NT_AMD_AMDGPU_ISA (ISA Version)"}, 4917 {ELF::NT_AMD_AMDGPU_PAL_METADATA, 4918 "NT_AMD_AMDGPU_PAL_METADATA (PAL Metadata)"}}; 4919 4920 for (const auto &Note : Notes) 4921 if (Note.ID == NT) 4922 return std::string(Note.Name); 4923 4924 std::string string; 4925 raw_string_ostream OS(string); 4926 OS << format("Unknown note type (0x%08x)", NT); 4927 return OS.str(); 4928 } 4929 4930 static std::string getAMDGPUNoteTypeName(const uint32_t NT) { 4931 if (NT == ELF::NT_AMDGPU_METADATA) 4932 return std::string("NT_AMDGPU_METADATA (AMDGPU Metadata)"); 4933 4934 std::string string; 4935 raw_string_ostream OS(string); 4936 OS << format("Unknown note type (0x%08x)", NT); 4937 return OS.str(); 4938 } 4939 4940 template <typename ELFT> 4941 static std::string getGNUProperty(uint32_t Type, uint32_t DataSize, 4942 ArrayRef<uint8_t> Data) { 4943 std::string str; 4944 raw_string_ostream OS(str); 4945 uint32_t PrData; 4946 auto DumpBit = [&](uint32_t Flag, StringRef Name) { 4947 if (PrData & Flag) { 4948 PrData &= ~Flag; 4949 OS << Name; 4950 if (PrData) 4951 OS << ", "; 4952 } 4953 }; 4954 4955 switch (Type) { 4956 default: 4957 OS << format("<application-specific type 0x%x>", Type); 4958 return OS.str(); 4959 case GNU_PROPERTY_STACK_SIZE: { 4960 OS << "stack size: "; 4961 if (DataSize == sizeof(typename ELFT::uint)) 4962 OS << formatv("{0:x}", 4963 (uint64_t)(*(const typename ELFT::Addr *)Data.data())); 4964 else 4965 OS << format("<corrupt length: 0x%x>", DataSize); 4966 return OS.str(); 4967 } 4968 case GNU_PROPERTY_NO_COPY_ON_PROTECTED: 4969 OS << "no copy on protected"; 4970 if (DataSize) 4971 OS << format(" <corrupt length: 0x%x>", DataSize); 4972 return OS.str(); 4973 case GNU_PROPERTY_AARCH64_FEATURE_1_AND: 4974 case GNU_PROPERTY_X86_FEATURE_1_AND: 4975 OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: " 4976 : "x86 feature: "); 4977 if (DataSize != 4) { 4978 OS << format("<corrupt length: 0x%x>", DataSize); 4979 return OS.str(); 4980 } 4981 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4982 if (PrData == 0) { 4983 OS << "<None>"; 4984 return OS.str(); 4985 } 4986 if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) { 4987 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI"); 4988 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC"); 4989 } else { 4990 DumpBit(GNU_PROPERTY_X86_FEATURE_1_IBT, "IBT"); 4991 DumpBit(GNU_PROPERTY_X86_FEATURE_1_SHSTK, "SHSTK"); 4992 } 4993 if (PrData) 4994 OS << format("<unknown flags: 0x%x>", PrData); 4995 return OS.str(); 4996 case GNU_PROPERTY_X86_ISA_1_NEEDED: 4997 case GNU_PROPERTY_X86_ISA_1_USED: 4998 OS << "x86 ISA " 4999 << (Type == GNU_PROPERTY_X86_ISA_1_NEEDED ? "needed: " : "used: "); 5000 if (DataSize != 4) { 5001 OS << format("<corrupt length: 0x%x>", DataSize); 5002 return OS.str(); 5003 } 5004 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 5005 if (PrData == 0) { 5006 OS << "<None>"; 5007 return OS.str(); 5008 } 5009 DumpBit(GNU_PROPERTY_X86_ISA_1_CMOV, "CMOV"); 5010 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE, "SSE"); 5011 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE2, "SSE2"); 5012 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE3, "SSE3"); 5013 DumpBit(GNU_PROPERTY_X86_ISA_1_SSSE3, "SSSE3"); 5014 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_1, "SSE4_1"); 5015 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_2, "SSE4_2"); 5016 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX, "AVX"); 5017 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX2, "AVX2"); 5018 DumpBit(GNU_PROPERTY_X86_ISA_1_FMA, "FMA"); 5019 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512F, "AVX512F"); 5020 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512CD, "AVX512CD"); 5021 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512ER, "AVX512ER"); 5022 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512PF, "AVX512PF"); 5023 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512VL, "AVX512VL"); 5024 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512DQ, "AVX512DQ"); 5025 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512BW, "AVX512BW"); 5026 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4FMAPS, "AVX512_4FMAPS"); 5027 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4VNNIW, "AVX512_4VNNIW"); 5028 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_BITALG, "AVX512_BITALG"); 5029 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_IFMA, "AVX512_IFMA"); 5030 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI, "AVX512_VBMI"); 5031 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI2, "AVX512_VBMI2"); 5032 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VNNI, "AVX512_VNNI"); 5033 if (PrData) 5034 OS << format("<unknown flags: 0x%x>", PrData); 5035 return OS.str(); 5036 break; 5037 case GNU_PROPERTY_X86_FEATURE_2_NEEDED: 5038 case GNU_PROPERTY_X86_FEATURE_2_USED: 5039 OS << "x86 feature " 5040 << (Type == GNU_PROPERTY_X86_FEATURE_2_NEEDED ? "needed: " : "used: "); 5041 if (DataSize != 4) { 5042 OS << format("<corrupt length: 0x%x>", DataSize); 5043 return OS.str(); 5044 } 5045 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 5046 if (PrData == 0) { 5047 OS << "<None>"; 5048 return OS.str(); 5049 } 5050 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X86, "x86"); 5051 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X87, "x87"); 5052 DumpBit(GNU_PROPERTY_X86_FEATURE_2_MMX, "MMX"); 5053 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XMM, "XMM"); 5054 DumpBit(GNU_PROPERTY_X86_FEATURE_2_YMM, "YMM"); 5055 DumpBit(GNU_PROPERTY_X86_FEATURE_2_ZMM, "ZMM"); 5056 DumpBit(GNU_PROPERTY_X86_FEATURE_2_FXSR, "FXSR"); 5057 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVE, "XSAVE"); 5058 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT, "XSAVEOPT"); 5059 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEC, "XSAVEC"); 5060 if (PrData) 5061 OS << format("<unknown flags: 0x%x>", PrData); 5062 return OS.str(); 5063 } 5064 } 5065 5066 template <typename ELFT> 5067 static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) { 5068 using Elf_Word = typename ELFT::Word; 5069 5070 SmallVector<std::string, 4> Properties; 5071 while (Arr.size() >= 8) { 5072 uint32_t Type = *reinterpret_cast<const Elf_Word *>(Arr.data()); 5073 uint32_t DataSize = *reinterpret_cast<const Elf_Word *>(Arr.data() + 4); 5074 Arr = Arr.drop_front(8); 5075 5076 // Take padding size into account if present. 5077 uint64_t PaddedSize = alignTo(DataSize, sizeof(typename ELFT::uint)); 5078 std::string str; 5079 raw_string_ostream OS(str); 5080 if (Arr.size() < PaddedSize) { 5081 OS << format("<corrupt type (0x%x) datasz: 0x%x>", Type, DataSize); 5082 Properties.push_back(OS.str()); 5083 break; 5084 } 5085 Properties.push_back( 5086 getGNUProperty<ELFT>(Type, DataSize, Arr.take_front(PaddedSize))); 5087 Arr = Arr.drop_front(PaddedSize); 5088 } 5089 5090 if (!Arr.empty()) 5091 Properties.push_back("<corrupted GNU_PROPERTY_TYPE_0>"); 5092 5093 return Properties; 5094 } 5095 5096 struct GNUAbiTag { 5097 std::string OSName; 5098 std::string ABI; 5099 bool IsValid; 5100 }; 5101 5102 template <typename ELFT> static GNUAbiTag getGNUAbiTag(ArrayRef<uint8_t> Desc) { 5103 typedef typename ELFT::Word Elf_Word; 5104 5105 ArrayRef<Elf_Word> Words(reinterpret_cast<const Elf_Word *>(Desc.begin()), 5106 reinterpret_cast<const Elf_Word *>(Desc.end())); 5107 5108 if (Words.size() < 4) 5109 return {"", "", /*IsValid=*/false}; 5110 5111 static const char *OSNames[] = { 5112 "Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable", "NaCl", 5113 }; 5114 StringRef OSName = "Unknown"; 5115 if (Words[0] < array_lengthof(OSNames)) 5116 OSName = OSNames[Words[0]]; 5117 uint32_t Major = Words[1], Minor = Words[2], Patch = Words[3]; 5118 std::string str; 5119 raw_string_ostream ABI(str); 5120 ABI << Major << "." << Minor << "." << Patch; 5121 return {std::string(OSName), ABI.str(), /*IsValid=*/true}; 5122 } 5123 5124 static std::string getGNUBuildId(ArrayRef<uint8_t> Desc) { 5125 std::string str; 5126 raw_string_ostream OS(str); 5127 for (const auto &B : Desc) 5128 OS << format_hex_no_prefix(B, 2); 5129 return OS.str(); 5130 } 5131 5132 static StringRef getGNUGoldVersion(ArrayRef<uint8_t> Desc) { 5133 return StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5134 } 5135 5136 template <typename ELFT> 5137 static void printGNUNote(raw_ostream &OS, uint32_t NoteType, 5138 ArrayRef<uint8_t> Desc) { 5139 switch (NoteType) { 5140 default: 5141 return; 5142 case ELF::NT_GNU_ABI_TAG: { 5143 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 5144 if (!AbiTag.IsValid) 5145 OS << " <corrupt GNU_ABI_TAG>"; 5146 else 5147 OS << " OS: " << AbiTag.OSName << ", ABI: " << AbiTag.ABI; 5148 break; 5149 } 5150 case ELF::NT_GNU_BUILD_ID: { 5151 OS << " Build ID: " << getGNUBuildId(Desc); 5152 break; 5153 } 5154 case ELF::NT_GNU_GOLD_VERSION: 5155 OS << " Version: " << getGNUGoldVersion(Desc); 5156 break; 5157 case ELF::NT_GNU_PROPERTY_TYPE_0: 5158 OS << " Properties:"; 5159 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 5160 OS << " " << Property << "\n"; 5161 break; 5162 } 5163 OS << '\n'; 5164 } 5165 5166 struct AMDNote { 5167 std::string Type; 5168 std::string Value; 5169 }; 5170 5171 template <typename ELFT> 5172 static AMDNote getAMDNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5173 switch (NoteType) { 5174 default: 5175 return {"", ""}; 5176 case ELF::NT_AMD_AMDGPU_HSA_METADATA: 5177 return { 5178 "HSA Metadata", 5179 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5180 case ELF::NT_AMD_AMDGPU_ISA: 5181 return { 5182 "ISA Version", 5183 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5184 } 5185 } 5186 5187 struct AMDGPUNote { 5188 std::string Type; 5189 std::string Value; 5190 }; 5191 5192 template <typename ELFT> 5193 static AMDGPUNote getAMDGPUNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5194 switch (NoteType) { 5195 default: 5196 return {"", ""}; 5197 case ELF::NT_AMDGPU_METADATA: { 5198 auto MsgPackString = 5199 StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5200 msgpack::Document MsgPackDoc; 5201 if (!MsgPackDoc.readFromBlob(MsgPackString, /*Multi=*/false)) 5202 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5203 5204 AMDGPU::HSAMD::V3::MetadataVerifier Verifier(true); 5205 if (!Verifier.verify(MsgPackDoc.getRoot())) 5206 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5207 5208 std::string HSAMetadataString; 5209 raw_string_ostream StrOS(HSAMetadataString); 5210 MsgPackDoc.toYAML(StrOS); 5211 5212 return {"AMDGPU Metadata", StrOS.str()}; 5213 } 5214 } 5215 } 5216 5217 struct CoreFileMapping { 5218 uint64_t Start, End, Offset; 5219 StringRef Filename; 5220 }; 5221 5222 struct CoreNote { 5223 uint64_t PageSize; 5224 std::vector<CoreFileMapping> Mappings; 5225 }; 5226 5227 static Expected<CoreNote> readCoreNote(DataExtractor Desc) { 5228 // Expected format of the NT_FILE note description: 5229 // 1. # of file mappings (call it N) 5230 // 2. Page size 5231 // 3. N (start, end, offset) triples 5232 // 4. N packed filenames (null delimited) 5233 // Each field is an Elf_Addr, except for filenames which are char* strings. 5234 5235 CoreNote Ret; 5236 const int Bytes = Desc.getAddressSize(); 5237 5238 if (!Desc.isValidOffsetForAddress(2)) 5239 return createStringError(object_error::parse_failed, 5240 "malformed note: header too short"); 5241 if (Desc.getData().back() != 0) 5242 return createStringError(object_error::parse_failed, 5243 "malformed note: not NUL terminated"); 5244 5245 uint64_t DescOffset = 0; 5246 uint64_t FileCount = Desc.getAddress(&DescOffset); 5247 Ret.PageSize = Desc.getAddress(&DescOffset); 5248 5249 if (!Desc.isValidOffsetForAddress(3 * FileCount * Bytes)) 5250 return createStringError(object_error::parse_failed, 5251 "malformed note: too short for number of files"); 5252 5253 uint64_t FilenamesOffset = 0; 5254 DataExtractor Filenames( 5255 Desc.getData().drop_front(DescOffset + 3 * FileCount * Bytes), 5256 Desc.isLittleEndian(), Desc.getAddressSize()); 5257 5258 Ret.Mappings.resize(FileCount); 5259 for (CoreFileMapping &Mapping : Ret.Mappings) { 5260 if (!Filenames.isValidOffsetForDataOfSize(FilenamesOffset, 1)) 5261 return createStringError(object_error::parse_failed, 5262 "malformed note: too few filenames"); 5263 Mapping.Start = Desc.getAddress(&DescOffset); 5264 Mapping.End = Desc.getAddress(&DescOffset); 5265 Mapping.Offset = Desc.getAddress(&DescOffset); 5266 Mapping.Filename = Filenames.getCStrRef(&FilenamesOffset); 5267 } 5268 5269 return Ret; 5270 } 5271 5272 template <typename ELFT> 5273 static void printCoreNote(raw_ostream &OS, const CoreNote &Note) { 5274 // Length of "0x<address>" string. 5275 const int FieldWidth = ELFT::Is64Bits ? 18 : 10; 5276 5277 OS << " Page size: " << format_decimal(Note.PageSize, 0) << '\n'; 5278 OS << " " << right_justify("Start", FieldWidth) << " " 5279 << right_justify("End", FieldWidth) << " " 5280 << right_justify("Page Offset", FieldWidth) << '\n'; 5281 for (const CoreFileMapping &Mapping : Note.Mappings) { 5282 OS << " " << format_hex(Mapping.Start, FieldWidth) << " " 5283 << format_hex(Mapping.End, FieldWidth) << " " 5284 << format_hex(Mapping.Offset, FieldWidth) << "\n " 5285 << Mapping.Filename << '\n'; 5286 } 5287 } 5288 5289 template <class ELFT> 5290 void GNUStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 5291 auto PrintHeader = [&](Optional<StringRef> SecName, 5292 const typename ELFT::Off Offset, 5293 const typename ELFT::Addr Size) { 5294 OS << "Displaying notes found "; 5295 5296 if (SecName) 5297 OS << "in: " << *SecName << "\n"; 5298 else 5299 OS << "at file offset " << format_hex(Offset, 10) << " with length " 5300 << format_hex(Size, 10) << ":\n"; 5301 5302 OS << " Owner Data size \tDescription\n"; 5303 }; 5304 5305 auto ProcessNote = [&](const Elf_Note &Note) { 5306 StringRef Name = Note.getName(); 5307 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 5308 Elf_Word Type = Note.getType(); 5309 5310 // Print the note owner/type. 5311 OS << " " << left_justify(Name, 20) << ' ' 5312 << format_hex(Descriptor.size(), 10) << '\t'; 5313 if (Name == "GNU") { 5314 OS << getGNUNoteTypeName(Type) << '\n'; 5315 } else if (Name == "FreeBSD") { 5316 OS << getFreeBSDNoteTypeName(Type) << '\n'; 5317 } else if (Name == "AMD") { 5318 OS << getAMDNoteTypeName(Type) << '\n'; 5319 } else if (Name == "AMDGPU") { 5320 OS << getAMDGPUNoteTypeName(Type) << '\n'; 5321 } else { 5322 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 5323 ? getCoreNoteTypeName(Type) 5324 : getGenericNoteTypeName(Type); 5325 if (!NoteType.empty()) 5326 OS << NoteType << '\n'; 5327 else 5328 OS << "Unknown note type: (" << format_hex(Type, 10) << ")\n"; 5329 } 5330 5331 // Print the description, or fallback to printing raw bytes for unknown 5332 // owners. 5333 if (Name == "GNU") { 5334 printGNUNote<ELFT>(OS, Type, Descriptor); 5335 } else if (Name == "AMD") { 5336 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 5337 if (!N.Type.empty()) 5338 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5339 } else if (Name == "AMDGPU") { 5340 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 5341 if (!N.Type.empty()) 5342 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5343 } else if (Name == "CORE") { 5344 if (Type == ELF::NT_FILE) { 5345 DataExtractor DescExtractor(Descriptor, 5346 ELFT::TargetEndianness == support::little, 5347 sizeof(Elf_Addr)); 5348 Expected<CoreNote> Note = readCoreNote(DescExtractor); 5349 if (Note) 5350 printCoreNote<ELFT>(OS, *Note); 5351 else 5352 reportWarning(Note.takeError(), this->FileName); 5353 } 5354 } else if (!Descriptor.empty()) { 5355 OS << " description data:"; 5356 for (uint8_t B : Descriptor) 5357 OS << " " << format("%02x", B); 5358 OS << '\n'; 5359 } 5360 }; 5361 5362 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 5363 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 5364 for (const auto &S : Sections) { 5365 if (S.sh_type != SHT_NOTE) 5366 continue; 5367 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 5368 S.sh_size); 5369 Error Err = Error::success(); 5370 for (auto Note : Obj->notes(S, Err)) 5371 ProcessNote(Note); 5372 if (Err) 5373 reportError(std::move(Err), this->FileName); 5374 } 5375 } else { 5376 for (const auto &P : 5377 unwrapOrError(this->FileName, Obj->program_headers())) { 5378 if (P.p_type != PT_NOTE) 5379 continue; 5380 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 5381 Error Err = Error::success(); 5382 for (auto Note : Obj->notes(P, Err)) 5383 ProcessNote(Note); 5384 if (Err) 5385 reportError(std::move(Err), this->FileName); 5386 } 5387 } 5388 } 5389 5390 template <class ELFT> 5391 void GNUStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 5392 OS << "printELFLinkerOptions not implemented!\n"; 5393 } 5394 5395 template <class ELFT> 5396 void DumpStyle<ELFT>::printDependentLibsHelper( 5397 const ELFFile<ELFT> *Obj, 5398 function_ref<void(const Elf_Shdr &)> OnSectionStart, 5399 function_ref<void(StringRef, uint64_t)> OnLibEntry) { 5400 auto Warn = [this](unsigned SecNdx, StringRef Msg) { 5401 this->reportUniqueWarning( 5402 createError("SHT_LLVM_DEPENDENT_LIBRARIES section at index " + 5403 Twine(SecNdx) + " is broken: " + Msg)); 5404 }; 5405 5406 unsigned I = -1; 5407 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 5408 ++I; 5409 if (Shdr.sh_type != ELF::SHT_LLVM_DEPENDENT_LIBRARIES) 5410 continue; 5411 5412 OnSectionStart(Shdr); 5413 5414 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(&Shdr); 5415 if (!ContentsOrErr) { 5416 Warn(I, toString(ContentsOrErr.takeError())); 5417 continue; 5418 } 5419 5420 ArrayRef<uint8_t> Contents = *ContentsOrErr; 5421 if (!Contents.empty() && Contents.back() != 0) { 5422 Warn(I, "the content is not null-terminated"); 5423 continue; 5424 } 5425 5426 for (const uint8_t *I = Contents.begin(), *E = Contents.end(); I < E;) { 5427 StringRef Lib((const char *)I); 5428 OnLibEntry(Lib, I - Contents.begin()); 5429 I += Lib.size() + 1; 5430 } 5431 } 5432 } 5433 5434 template <class ELFT> 5435 void GNUStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 5436 bool SectionStarted = false; 5437 struct NameOffset { 5438 StringRef Name; 5439 uint64_t Offset; 5440 }; 5441 std::vector<NameOffset> SecEntries; 5442 NameOffset Current; 5443 auto PrintSection = [&]() { 5444 OS << "Dependent libraries section " << Current.Name << " at offset " 5445 << format_hex(Current.Offset, 1) << " contains " << SecEntries.size() 5446 << " entries:\n"; 5447 for (NameOffset Entry : SecEntries) 5448 OS << " [" << format("%6tx", Entry.Offset) << "] " << Entry.Name 5449 << "\n"; 5450 OS << "\n"; 5451 SecEntries.clear(); 5452 }; 5453 5454 auto OnSectionStart = [&](const Elf_Shdr &Shdr) { 5455 if (SectionStarted) 5456 PrintSection(); 5457 SectionStarted = true; 5458 Current.Offset = Shdr.sh_offset; 5459 Expected<StringRef> Name = Obj->getSectionName(&Shdr); 5460 if (!Name) { 5461 Current.Name = "<?>"; 5462 this->reportUniqueWarning( 5463 createError("cannot get section name of " 5464 "SHT_LLVM_DEPENDENT_LIBRARIES section: " + 5465 toString(Name.takeError()))); 5466 } else { 5467 Current.Name = *Name; 5468 } 5469 }; 5470 auto OnLibEntry = [&](StringRef Lib, uint64_t Offset) { 5471 SecEntries.push_back(NameOffset{Lib, Offset}); 5472 }; 5473 5474 this->printDependentLibsHelper(Obj, OnSectionStart, OnLibEntry); 5475 if (SectionStarted) 5476 PrintSection(); 5477 } 5478 5479 // Used for printing section names in places where possible errors can be 5480 // ignored. 5481 static StringRef getSectionName(const SectionRef &Sec) { 5482 Expected<StringRef> NameOrErr = Sec.getName(); 5483 if (NameOrErr) 5484 return *NameOrErr; 5485 consumeError(NameOrErr.takeError()); 5486 return "<?>"; 5487 } 5488 5489 // Used for printing symbol names in places where possible errors can be 5490 // ignored. 5491 static std::string getSymbolName(const ELFSymbolRef &Sym) { 5492 Expected<StringRef> NameOrErr = Sym.getName(); 5493 if (NameOrErr) 5494 return maybeDemangle(*NameOrErr); 5495 consumeError(NameOrErr.takeError()); 5496 return "<?>"; 5497 } 5498 5499 template <class ELFT> 5500 void DumpStyle<ELFT>::printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, 5501 uint64_t SymValue, 5502 Optional<SectionRef> FunctionSec, 5503 const StringRef SectionName, 5504 DataExtractor Data, 5505 uint64_t *Offset) { 5506 // This function ignores potentially erroneous input, unless it is directly 5507 // related to stack size reporting. 5508 SymbolRef FuncSym; 5509 for (const ELFSymbolRef &Symbol : Obj->symbols()) { 5510 Expected<uint64_t> SymAddrOrErr = Symbol.getAddress(); 5511 if (!SymAddrOrErr) { 5512 consumeError(SymAddrOrErr.takeError()); 5513 continue; 5514 } 5515 if (Expected<uint32_t> SymFlags = Symbol.getFlags()) { 5516 if (*SymFlags & SymbolRef::SF_Undefined) 5517 continue; 5518 } else 5519 consumeError(SymFlags.takeError()); 5520 if (Symbol.getELFType() == ELF::STT_FUNC && *SymAddrOrErr == SymValue) { 5521 // Check if the symbol is in the right section. FunctionSec == None means 5522 // "any section". 5523 if (!FunctionSec || FunctionSec->containsSymbol(Symbol)) { 5524 FuncSym = Symbol; 5525 break; 5526 } 5527 } 5528 } 5529 5530 std::string FuncName = "?"; 5531 // A valid SymbolRef has a non-null object file pointer. 5532 if (FuncSym.BasicSymbolRef::getObject()) 5533 FuncName = getSymbolName(FuncSym); 5534 else 5535 reportWarning( 5536 createError("could not identify function symbol for stack size entry"), 5537 Obj->getFileName()); 5538 5539 // Extract the size. The expectation is that Offset is pointing to the right 5540 // place, i.e. past the function address. 5541 uint64_t PrevOffset = *Offset; 5542 uint64_t StackSize = Data.getULEB128(Offset); 5543 // getULEB128() does not advance Offset if it is not able to extract a valid 5544 // integer. 5545 if (*Offset == PrevOffset) 5546 reportError( 5547 createStringError(object_error::parse_failed, 5548 "could not extract a valid stack size in section %s", 5549 SectionName.data()), 5550 Obj->getFileName()); 5551 5552 printStackSizeEntry(StackSize, FuncName); 5553 } 5554 5555 template <class ELFT> 5556 void GNUStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 5557 OS.PadToColumn(2); 5558 OS << format_decimal(Size, 11); 5559 OS.PadToColumn(18); 5560 OS << FuncName << "\n"; 5561 } 5562 5563 template <class ELFT> 5564 void DumpStyle<ELFT>::printStackSize(const ELFObjectFile<ELFT> *Obj, 5565 RelocationRef Reloc, 5566 SectionRef FunctionSec, 5567 const StringRef &StackSizeSectionName, 5568 const RelocationResolver &Resolver, 5569 DataExtractor Data) { 5570 // This function ignores potentially erroneous input, unless it is directly 5571 // related to stack size reporting. 5572 object::symbol_iterator RelocSym = Reloc.getSymbol(); 5573 uint64_t RelocSymValue = 0; 5574 StringRef FileStr = Obj->getFileName(); 5575 if (RelocSym != Obj->symbol_end()) { 5576 // Ensure that the relocation symbol is in the function section, i.e. the 5577 // section where the functions whose stack sizes we are reporting are 5578 // located. 5579 auto SectionOrErr = RelocSym->getSection(); 5580 if (!SectionOrErr) { 5581 reportWarning( 5582 createError("cannot identify the section for relocation symbol '" + 5583 getSymbolName(*RelocSym) + "'"), 5584 FileStr); 5585 consumeError(SectionOrErr.takeError()); 5586 } else if (*SectionOrErr != FunctionSec) { 5587 reportWarning(createError("relocation symbol '" + 5588 getSymbolName(*RelocSym) + 5589 "' is not in the expected section"), 5590 FileStr); 5591 // Pretend that the symbol is in the correct section and report its 5592 // stack size anyway. 5593 FunctionSec = **SectionOrErr; 5594 } 5595 5596 Expected<uint64_t> RelocSymValueOrErr = RelocSym->getValue(); 5597 if (RelocSymValueOrErr) 5598 RelocSymValue = *RelocSymValueOrErr; 5599 else 5600 consumeError(RelocSymValueOrErr.takeError()); 5601 } 5602 5603 uint64_t Offset = Reloc.getOffset(); 5604 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) 5605 reportError( 5606 createStringError(object_error::parse_failed, 5607 "found invalid relocation offset into section %s " 5608 "while trying to extract a stack size entry", 5609 StackSizeSectionName.data()), 5610 FileStr); 5611 5612 uint64_t Addend = Data.getAddress(&Offset); 5613 uint64_t SymValue = Resolver(Reloc, RelocSymValue, Addend); 5614 this->printFunctionStackSize(Obj, SymValue, FunctionSec, StackSizeSectionName, 5615 Data, &Offset); 5616 } 5617 5618 template <class ELFT> 5619 void DumpStyle<ELFT>::printNonRelocatableStackSizes( 5620 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5621 // This function ignores potentially erroneous input, unless it is directly 5622 // related to stack size reporting. 5623 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5624 StringRef FileStr = Obj->getFileName(); 5625 for (const SectionRef &Sec : Obj->sections()) { 5626 StringRef SectionName = getSectionName(Sec); 5627 if (SectionName != ".stack_sizes") 5628 continue; 5629 PrintHeader(); 5630 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5631 ArrayRef<uint8_t> Contents = 5632 unwrapOrError(this->FileName, EF->getSectionContents(ElfSec)); 5633 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5634 uint64_t Offset = 0; 5635 while (Offset < Contents.size()) { 5636 // The function address is followed by a ULEB representing the stack 5637 // size. Check for an extra byte before we try to process the entry. 5638 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) { 5639 reportError( 5640 createStringError( 5641 object_error::parse_failed, 5642 "section %s ended while trying to extract a stack size entry", 5643 SectionName.data()), 5644 FileStr); 5645 } 5646 uint64_t SymValue = Data.getAddress(&Offset); 5647 printFunctionStackSize(Obj, SymValue, /*FunctionSec=*/None, SectionName, 5648 Data, &Offset); 5649 } 5650 } 5651 } 5652 5653 template <class ELFT> 5654 void DumpStyle<ELFT>::printRelocatableStackSizes( 5655 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5656 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5657 5658 // Build a map between stack size sections and their corresponding relocation 5659 // sections. 5660 llvm::MapVector<SectionRef, SectionRef> StackSizeRelocMap; 5661 const SectionRef NullSection{}; 5662 5663 for (const SectionRef &Sec : Obj->sections()) { 5664 StringRef SectionName; 5665 if (Expected<StringRef> NameOrErr = Sec.getName()) 5666 SectionName = *NameOrErr; 5667 else 5668 consumeError(NameOrErr.takeError()); 5669 5670 // A stack size section that we haven't encountered yet is mapped to the 5671 // null section until we find its corresponding relocation section. 5672 if (SectionName == ".stack_sizes") 5673 if (StackSizeRelocMap.count(Sec) == 0) { 5674 StackSizeRelocMap[Sec] = NullSection; 5675 continue; 5676 } 5677 5678 // Check relocation sections if they are relocating contents of a 5679 // stack sizes section. 5680 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5681 uint32_t SectionType = ElfSec->sh_type; 5682 if (SectionType != ELF::SHT_RELA && SectionType != ELF::SHT_REL) 5683 continue; 5684 5685 Expected<section_iterator> RelSecOrErr = Sec.getRelocatedSection(); 5686 if (!RelSecOrErr) 5687 reportError(createStringError(object_error::parse_failed, 5688 "%s: failed to get a relocated section: %s", 5689 SectionName.data(), 5690 toString(RelSecOrErr.takeError()).c_str()), 5691 Obj->getFileName()); 5692 5693 const Elf_Shdr *ContentsSec = 5694 Obj->getSection((*RelSecOrErr)->getRawDataRefImpl()); 5695 Expected<StringRef> ContentsSectionNameOrErr = 5696 EF->getSectionName(ContentsSec); 5697 if (!ContentsSectionNameOrErr) { 5698 consumeError(ContentsSectionNameOrErr.takeError()); 5699 continue; 5700 } 5701 if (*ContentsSectionNameOrErr != ".stack_sizes") 5702 continue; 5703 // Insert a mapping from the stack sizes section to its relocation section. 5704 StackSizeRelocMap[Obj->toSectionRef(ContentsSec)] = Sec; 5705 } 5706 5707 for (const auto &StackSizeMapEntry : StackSizeRelocMap) { 5708 PrintHeader(); 5709 const SectionRef &StackSizesSec = StackSizeMapEntry.first; 5710 const SectionRef &RelocSec = StackSizeMapEntry.second; 5711 5712 // Warn about stack size sections without a relocation section. 5713 StringRef StackSizeSectionName = getSectionName(StackSizesSec); 5714 if (RelocSec == NullSection) { 5715 reportWarning(createError("section " + StackSizeSectionName + 5716 " does not have a corresponding " 5717 "relocation section"), 5718 Obj->getFileName()); 5719 continue; 5720 } 5721 5722 // A .stack_sizes section header's sh_link field is supposed to point 5723 // to the section that contains the functions whose stack sizes are 5724 // described in it. 5725 const Elf_Shdr *StackSizesELFSec = 5726 Obj->getSection(StackSizesSec.getRawDataRefImpl()); 5727 const SectionRef FunctionSec = Obj->toSectionRef(unwrapOrError( 5728 this->FileName, EF->getSection(StackSizesELFSec->sh_link))); 5729 5730 bool (*IsSupportedFn)(uint64_t); 5731 RelocationResolver Resolver; 5732 std::tie(IsSupportedFn, Resolver) = getRelocationResolver(*Obj); 5733 auto Contents = unwrapOrError(this->FileName, StackSizesSec.getContents()); 5734 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5735 for (const RelocationRef &Reloc : RelocSec.relocations()) { 5736 if (!IsSupportedFn || !IsSupportedFn(Reloc.getType())) 5737 reportError(createStringError( 5738 object_error::parse_failed, 5739 "unsupported relocation type in section %s: %s", 5740 getSectionName(RelocSec).data(), 5741 EF->getRelocationTypeName(Reloc.getType()).data()), 5742 Obj->getFileName()); 5743 this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName, 5744 Resolver, Data); 5745 } 5746 } 5747 } 5748 5749 template <class ELFT> 5750 void GNUStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 5751 bool HeaderHasBeenPrinted = false; 5752 auto PrintHeader = [&]() { 5753 if (HeaderHasBeenPrinted) 5754 return; 5755 OS << "\nStack Sizes:\n"; 5756 OS.PadToColumn(9); 5757 OS << "Size"; 5758 OS.PadToColumn(18); 5759 OS << "Function\n"; 5760 HeaderHasBeenPrinted = true; 5761 }; 5762 5763 // For non-relocatable objects, look directly for sections whose name starts 5764 // with .stack_sizes and process the contents. 5765 if (Obj->isRelocatableObject()) 5766 this->printRelocatableStackSizes(Obj, PrintHeader); 5767 else 5768 this->printNonRelocatableStackSizes(Obj, PrintHeader); 5769 } 5770 5771 template <class ELFT> 5772 void GNUStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 5773 size_t Bias = ELFT::Is64Bits ? 8 : 0; 5774 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 5775 OS.PadToColumn(2); 5776 OS << format_hex_no_prefix(Parser.getGotAddress(E), 8 + Bias); 5777 OS.PadToColumn(11 + Bias); 5778 OS << format_decimal(Parser.getGotOffset(E), 6) << "(gp)"; 5779 OS.PadToColumn(22 + Bias); 5780 OS << format_hex_no_prefix(*E, 8 + Bias); 5781 OS.PadToColumn(31 + 2 * Bias); 5782 OS << Purpose << "\n"; 5783 }; 5784 5785 OS << (Parser.IsStatic ? "Static GOT:\n" : "Primary GOT:\n"); 5786 OS << " Canonical gp value: " 5787 << format_hex_no_prefix(Parser.getGp(), 8 + Bias) << "\n\n"; 5788 5789 OS << " Reserved entries:\n"; 5790 if (ELFT::Is64Bits) 5791 OS << " Address Access Initial Purpose\n"; 5792 else 5793 OS << " Address Access Initial Purpose\n"; 5794 PrintEntry(Parser.getGotLazyResolver(), "Lazy resolver"); 5795 if (Parser.getGotModulePointer()) 5796 PrintEntry(Parser.getGotModulePointer(), "Module pointer (GNU extension)"); 5797 5798 if (!Parser.getLocalEntries().empty()) { 5799 OS << "\n"; 5800 OS << " Local entries:\n"; 5801 if (ELFT::Is64Bits) 5802 OS << " Address Access Initial\n"; 5803 else 5804 OS << " Address Access Initial\n"; 5805 for (auto &E : Parser.getLocalEntries()) 5806 PrintEntry(&E, ""); 5807 } 5808 5809 if (Parser.IsStatic) 5810 return; 5811 5812 if (!Parser.getGlobalEntries().empty()) { 5813 OS << "\n"; 5814 OS << " Global entries:\n"; 5815 if (ELFT::Is64Bits) 5816 OS << " Address Access Initial Sym.Val." 5817 << " Type Ndx Name\n"; 5818 else 5819 OS << " Address Access Initial Sym.Val. Type Ndx Name\n"; 5820 for (auto &E : Parser.getGlobalEntries()) { 5821 const Elf_Sym *Sym = Parser.getGotSym(&E); 5822 std::string SymName = this->dumper()->getFullSymbolName( 5823 Sym, this->dumper()->getDynamicStringTable(), false); 5824 5825 OS.PadToColumn(2); 5826 OS << to_string(format_hex_no_prefix(Parser.getGotAddress(&E), 8 + Bias)); 5827 OS.PadToColumn(11 + Bias); 5828 OS << to_string(format_decimal(Parser.getGotOffset(&E), 6)) + "(gp)"; 5829 OS.PadToColumn(22 + Bias); 5830 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5831 OS.PadToColumn(31 + 2 * Bias); 5832 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5833 OS.PadToColumn(40 + 3 * Bias); 5834 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5835 OS.PadToColumn(48 + 3 * Bias); 5836 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5837 this->dumper()->dynamic_symbols().begin()); 5838 OS.PadToColumn(52 + 3 * Bias); 5839 OS << SymName << "\n"; 5840 } 5841 } 5842 5843 if (!Parser.getOtherEntries().empty()) 5844 OS << "\n Number of TLS and multi-GOT entries " 5845 << Parser.getOtherEntries().size() << "\n"; 5846 } 5847 5848 template <class ELFT> 5849 void GNUStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 5850 size_t Bias = ELFT::Is64Bits ? 8 : 0; 5851 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 5852 OS.PadToColumn(2); 5853 OS << format_hex_no_prefix(Parser.getPltAddress(E), 8 + Bias); 5854 OS.PadToColumn(11 + Bias); 5855 OS << format_hex_no_prefix(*E, 8 + Bias); 5856 OS.PadToColumn(20 + 2 * Bias); 5857 OS << Purpose << "\n"; 5858 }; 5859 5860 OS << "PLT GOT:\n\n"; 5861 5862 OS << " Reserved entries:\n"; 5863 OS << " Address Initial Purpose\n"; 5864 PrintEntry(Parser.getPltLazyResolver(), "PLT lazy resolver"); 5865 if (Parser.getPltModulePointer()) 5866 PrintEntry(Parser.getPltModulePointer(), "Module pointer"); 5867 5868 if (!Parser.getPltEntries().empty()) { 5869 OS << "\n"; 5870 OS << " Entries:\n"; 5871 OS << " Address Initial Sym.Val. Type Ndx Name\n"; 5872 for (auto &E : Parser.getPltEntries()) { 5873 const Elf_Sym *Sym = Parser.getPltSym(&E); 5874 std::string SymName = this->dumper()->getFullSymbolName( 5875 Sym, this->dumper()->getDynamicStringTable(), false); 5876 5877 OS.PadToColumn(2); 5878 OS << to_string(format_hex_no_prefix(Parser.getPltAddress(&E), 8 + Bias)); 5879 OS.PadToColumn(11 + Bias); 5880 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5881 OS.PadToColumn(20 + 2 * Bias); 5882 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5883 OS.PadToColumn(29 + 3 * Bias); 5884 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5885 OS.PadToColumn(37 + 3 * Bias); 5886 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5887 this->dumper()->dynamic_symbols().begin()); 5888 OS.PadToColumn(41 + 3 * Bias); 5889 OS << SymName << "\n"; 5890 } 5891 } 5892 } 5893 5894 template <class ELFT> 5895 void GNUStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 5896 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 5897 const Elf_Shdr *Shdr = 5898 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 5899 if (!Shdr) 5900 return; 5901 5902 ArrayRef<uint8_t> Sec = 5903 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 5904 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) 5905 reportError(createError(".MIPS.abiflags section has a wrong size"), 5906 ObjF->getFileName()); 5907 5908 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 5909 5910 OS << "MIPS ABI Flags Version: " << Flags->version << "\n\n"; 5911 OS << "ISA: MIPS" << int(Flags->isa_level); 5912 if (Flags->isa_rev > 1) 5913 OS << "r" << int(Flags->isa_rev); 5914 OS << "\n"; 5915 OS << "GPR size: " << getMipsRegisterSize(Flags->gpr_size) << "\n"; 5916 OS << "CPR1 size: " << getMipsRegisterSize(Flags->cpr1_size) << "\n"; 5917 OS << "CPR2 size: " << getMipsRegisterSize(Flags->cpr2_size) << "\n"; 5918 OS << "FP ABI: " << printEnum(Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)) 5919 << "\n"; 5920 OS << "ISA Extension: " 5921 << printEnum(Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)) << "\n"; 5922 if (Flags->ases == 0) 5923 OS << "ASEs: None\n"; 5924 else 5925 // FIXME: Print each flag on a separate line. 5926 OS << "ASEs: " << printFlags(Flags->ases, makeArrayRef(ElfMipsASEFlags)) 5927 << "\n"; 5928 OS << "FLAGS 1: " << format_hex_no_prefix(Flags->flags1, 8, false) << "\n"; 5929 OS << "FLAGS 2: " << format_hex_no_prefix(Flags->flags2, 8, false) << "\n"; 5930 OS << "\n"; 5931 } 5932 5933 template <class ELFT> void LLVMStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 5934 const Elf_Ehdr *E = Obj->getHeader(); 5935 { 5936 DictScope D(W, "ElfHeader"); 5937 { 5938 DictScope D(W, "Ident"); 5939 W.printBinary("Magic", makeArrayRef(E->e_ident).slice(ELF::EI_MAG0, 4)); 5940 W.printEnum("Class", E->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 5941 W.printEnum("DataEncoding", E->e_ident[ELF::EI_DATA], 5942 makeArrayRef(ElfDataEncoding)); 5943 W.printNumber("FileVersion", E->e_ident[ELF::EI_VERSION]); 5944 5945 auto OSABI = makeArrayRef(ElfOSABI); 5946 if (E->e_ident[ELF::EI_OSABI] >= ELF::ELFOSABI_FIRST_ARCH && 5947 E->e_ident[ELF::EI_OSABI] <= ELF::ELFOSABI_LAST_ARCH) { 5948 switch (E->e_machine) { 5949 case ELF::EM_AMDGPU: 5950 OSABI = makeArrayRef(AMDGPUElfOSABI); 5951 break; 5952 case ELF::EM_ARM: 5953 OSABI = makeArrayRef(ARMElfOSABI); 5954 break; 5955 case ELF::EM_TI_C6000: 5956 OSABI = makeArrayRef(C6000ElfOSABI); 5957 break; 5958 } 5959 } 5960 W.printEnum("OS/ABI", E->e_ident[ELF::EI_OSABI], OSABI); 5961 W.printNumber("ABIVersion", E->e_ident[ELF::EI_ABIVERSION]); 5962 W.printBinary("Unused", makeArrayRef(E->e_ident).slice(ELF::EI_PAD)); 5963 } 5964 5965 W.printEnum("Type", E->e_type, makeArrayRef(ElfObjectFileType)); 5966 W.printEnum("Machine", E->e_machine, makeArrayRef(ElfMachineType)); 5967 W.printNumber("Version", E->e_version); 5968 W.printHex("Entry", E->e_entry); 5969 W.printHex("ProgramHeaderOffset", E->e_phoff); 5970 W.printHex("SectionHeaderOffset", E->e_shoff); 5971 if (E->e_machine == EM_MIPS) 5972 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderMipsFlags), 5973 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 5974 unsigned(ELF::EF_MIPS_MACH)); 5975 else if (E->e_machine == EM_AMDGPU) 5976 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderAMDGPUFlags), 5977 unsigned(ELF::EF_AMDGPU_MACH)); 5978 else if (E->e_machine == EM_RISCV) 5979 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 5980 else 5981 W.printFlags("Flags", E->e_flags); 5982 W.printNumber("HeaderSize", E->e_ehsize); 5983 W.printNumber("ProgramHeaderEntrySize", E->e_phentsize); 5984 W.printNumber("ProgramHeaderCount", E->e_phnum); 5985 W.printNumber("SectionHeaderEntrySize", E->e_shentsize); 5986 W.printString("SectionHeaderCount", 5987 getSectionHeadersNumString(Obj, this->FileName)); 5988 W.printString("StringTableSectionIndex", 5989 getSectionHeaderTableIndexString(Obj, this->FileName)); 5990 } 5991 } 5992 5993 template <class ELFT> 5994 void LLVMStyle<ELFT>::printGroupSections(const ELFO *Obj) { 5995 DictScope Lists(W, "Groups"); 5996 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 5997 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 5998 for (const GroupSection &G : V) { 5999 DictScope D(W, "Group"); 6000 W.printNumber("Name", G.Name, G.ShName); 6001 W.printNumber("Index", G.Index); 6002 W.printNumber("Link", G.Link); 6003 W.printNumber("Info", G.Info); 6004 W.printHex("Type", getGroupType(G.Type), G.Type); 6005 W.startLine() << "Signature: " << G.Signature << "\n"; 6006 6007 ListScope L(W, "Section(s) in group"); 6008 for (const GroupMember &GM : G.Members) { 6009 const GroupSection *MainGroup = Map[GM.Index]; 6010 if (MainGroup != &G) { 6011 W.flush(); 6012 errs() << "Error: " << GM.Name << " (" << GM.Index 6013 << ") in a group " + G.Name + " (" << G.Index 6014 << ") is already in a group " + MainGroup->Name + " (" 6015 << MainGroup->Index << ")\n"; 6016 errs().flush(); 6017 continue; 6018 } 6019 W.startLine() << GM.Name << " (" << GM.Index << ")\n"; 6020 } 6021 } 6022 6023 if (V.empty()) 6024 W.startLine() << "There are no group sections in the file.\n"; 6025 } 6026 6027 template <class ELFT> void LLVMStyle<ELFT>::printRelocations(const ELFO *Obj) { 6028 ListScope D(W, "Relocations"); 6029 6030 int SectionNumber = -1; 6031 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 6032 ++SectionNumber; 6033 6034 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 6035 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 6036 Sec.sh_type != ELF::SHT_ANDROID_RELA && 6037 Sec.sh_type != ELF::SHT_ANDROID_RELR) 6038 continue; 6039 6040 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 6041 6042 W.startLine() << "Section (" << SectionNumber << ") " << Name << " {\n"; 6043 W.indent(); 6044 6045 printRelocations(&Sec, Obj); 6046 6047 W.unindent(); 6048 W.startLine() << "}\n"; 6049 } 6050 } 6051 6052 template <class ELFT> 6053 void LLVMStyle<ELFT>::printRelocations(const Elf_Shdr *Sec, const ELFO *Obj) { 6054 const Elf_Shdr *SymTab = 6055 unwrapOrError(this->FileName, Obj->getSection(Sec->sh_link)); 6056 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 6057 unsigned RelNdx = 0; 6058 6059 switch (Sec->sh_type) { 6060 case ELF::SHT_REL: 6061 for (const Elf_Rel &R : unwrapOrError(this->FileName, Obj->rels(Sec))) { 6062 Elf_Rela Rela; 6063 Rela.r_offset = R.r_offset; 6064 Rela.r_info = R.r_info; 6065 Rela.r_addend = 0; 6066 printRelocation(Obj, SecNdx, Rela, ++RelNdx, SymTab); 6067 } 6068 break; 6069 case ELF::SHT_RELA: 6070 for (const Elf_Rela &R : unwrapOrError(this->FileName, Obj->relas(Sec))) 6071 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6072 break; 6073 case ELF::SHT_RELR: 6074 case ELF::SHT_ANDROID_RELR: { 6075 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(Sec)); 6076 if (opts::RawRelr) { 6077 for (const Elf_Relr &R : Relrs) 6078 W.startLine() << W.hex(R) << "\n"; 6079 } else { 6080 std::vector<Elf_Rela> RelrRelas = 6081 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 6082 for (const Elf_Rela &R : RelrRelas) 6083 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6084 } 6085 break; 6086 } 6087 case ELF::SHT_ANDROID_REL: 6088 case ELF::SHT_ANDROID_RELA: 6089 for (const Elf_Rela &R : 6090 unwrapOrError(this->FileName, Obj->android_relas(Sec))) 6091 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6092 break; 6093 } 6094 } 6095 6096 template <class ELFT> 6097 void LLVMStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 6098 Elf_Rela Rel, unsigned RelIndex, 6099 const Elf_Shdr *SymTab) { 6100 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 6101 this->dumper()->getRelocationTarget(SymTab, Rel); 6102 if (!Target) { 6103 this->reportUniqueWarning(createError( 6104 "unable to print relocation " + Twine(RelIndex) + " in section " + 6105 Twine(SecIndex) + ": " + toString(Target.takeError()))); 6106 return; 6107 } 6108 6109 std::string TargetName = Target->second; 6110 SmallString<32> RelocName; 6111 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 6112 6113 if (opts::ExpandRelocs) { 6114 DictScope Group(W, "Relocation"); 6115 W.printHex("Offset", Rel.r_offset); 6116 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 6117 W.printNumber("Symbol", !TargetName.empty() ? TargetName : "-", 6118 Rel.getSymbol(Obj->isMips64EL())); 6119 W.printHex("Addend", Rel.r_addend); 6120 } else { 6121 raw_ostream &OS = W.startLine(); 6122 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 6123 << (!TargetName.empty() ? TargetName : "-") << " " << W.hex(Rel.r_addend) 6124 << "\n"; 6125 } 6126 } 6127 6128 template <class ELFT> 6129 void LLVMStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 6130 ListScope SectionsD(W, "Sections"); 6131 6132 int SectionIndex = -1; 6133 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 6134 std::vector<EnumEntry<unsigned>> FlagsList = 6135 getSectionFlagsForTarget(Obj->getHeader()->e_machine); 6136 for (const Elf_Shdr &Sec : Sections) { 6137 StringRef Name = "<?>"; 6138 if (Expected<StringRef> SecNameOrErr = 6139 Obj->getSectionName(&Sec, this->dumper()->WarningHandler)) 6140 Name = *SecNameOrErr; 6141 else 6142 this->reportUniqueWarning(SecNameOrErr.takeError()); 6143 6144 DictScope SectionD(W, "Section"); 6145 W.printNumber("Index", ++SectionIndex); 6146 W.printNumber("Name", Name, Sec.sh_name); 6147 W.printHex( 6148 "Type", 6149 object::getELFSectionTypeName(Obj->getHeader()->e_machine, Sec.sh_type), 6150 Sec.sh_type); 6151 W.printFlags("Flags", Sec.sh_flags, makeArrayRef(FlagsList)); 6152 W.printHex("Address", Sec.sh_addr); 6153 W.printHex("Offset", Sec.sh_offset); 6154 W.printNumber("Size", Sec.sh_size); 6155 W.printNumber("Link", Sec.sh_link); 6156 W.printNumber("Info", Sec.sh_info); 6157 W.printNumber("AddressAlignment", Sec.sh_addralign); 6158 W.printNumber("EntrySize", Sec.sh_entsize); 6159 6160 if (opts::SectionRelocations) { 6161 ListScope D(W, "Relocations"); 6162 printRelocations(&Sec, Obj); 6163 } 6164 6165 if (opts::SectionSymbols) { 6166 ListScope D(W, "Symbols"); 6167 const Elf_Shdr *Symtab = this->dumper()->getDotSymtabSec(); 6168 StringRef StrTable = 6169 unwrapOrError(this->FileName, Obj->getStringTableForSymtab(*Symtab)); 6170 6171 for (const Elf_Sym &Sym : 6172 unwrapOrError(this->FileName, Obj->symbols(Symtab))) { 6173 const Elf_Shdr *SymSec = unwrapOrError( 6174 this->FileName, 6175 Obj->getSection(&Sym, Symtab, this->dumper()->getShndxTable())); 6176 if (SymSec == &Sec) 6177 printSymbol( 6178 Obj, &Sym, 6179 unwrapOrError(this->FileName, Obj->symbols(Symtab)).begin(), 6180 StrTable, false, false); 6181 } 6182 } 6183 6184 if (opts::SectionData && Sec.sh_type != ELF::SHT_NOBITS) { 6185 ArrayRef<uint8_t> Data = 6186 unwrapOrError(this->FileName, Obj->getSectionContents(&Sec)); 6187 W.printBinaryBlock( 6188 "SectionData", 6189 StringRef(reinterpret_cast<const char *>(Data.data()), Data.size())); 6190 } 6191 } 6192 } 6193 6194 template <class ELFT> 6195 void LLVMStyle<ELFT>::printSymbolSection(const Elf_Sym *Symbol, 6196 const Elf_Sym *First) { 6197 Expected<unsigned> SectionIndex = 6198 this->dumper()->getSymbolSectionIndex(Symbol, First); 6199 if (!SectionIndex) { 6200 assert(Symbol->st_shndx == SHN_XINDEX && 6201 "getSymbolSectionIndex should only fail due to an invalid " 6202 "SHT_SYMTAB_SHNDX table/reference"); 6203 this->reportUniqueWarning(SectionIndex.takeError()); 6204 W.printHex("Section", "Reserved", SHN_XINDEX); 6205 return; 6206 } 6207 6208 Expected<StringRef> SectionName = 6209 this->dumper()->getSymbolSectionName(Symbol, *SectionIndex); 6210 if (!SectionName) { 6211 // Don't report an invalid section name if the section headers are missing. 6212 // In such situations, all sections will be "invalid". 6213 if (!this->dumper()->getElfObject()->sections().empty()) 6214 this->reportUniqueWarning(SectionName.takeError()); 6215 else 6216 consumeError(SectionName.takeError()); 6217 W.printHex("Section", "<?>", *SectionIndex); 6218 } else { 6219 W.printHex("Section", *SectionName, *SectionIndex); 6220 } 6221 } 6222 6223 template <class ELFT> 6224 void LLVMStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 6225 const Elf_Sym *First, StringRef StrTable, 6226 bool IsDynamic, 6227 bool /*NonVisibilityBitsUsed*/) { 6228 std::string FullSymbolName = 6229 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 6230 unsigned char SymbolType = Symbol->getType(); 6231 6232 DictScope D(W, "Symbol"); 6233 W.printNumber("Name", FullSymbolName, Symbol->st_name); 6234 W.printHex("Value", Symbol->st_value); 6235 W.printNumber("Size", Symbol->st_size); 6236 W.printEnum("Binding", Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 6237 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 6238 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 6239 W.printEnum("Type", SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 6240 else 6241 W.printEnum("Type", SymbolType, makeArrayRef(ElfSymbolTypes)); 6242 if (Symbol->st_other == 0) 6243 // Usually st_other flag is zero. Do not pollute the output 6244 // by flags enumeration in that case. 6245 W.printNumber("Other", 0); 6246 else { 6247 std::vector<EnumEntry<unsigned>> SymOtherFlags(std::begin(ElfSymOtherFlags), 6248 std::end(ElfSymOtherFlags)); 6249 if (Obj->getHeader()->e_machine == EM_MIPS) { 6250 // Someones in their infinite wisdom decided to make STO_MIPS_MIPS16 6251 // flag overlapped with other ST_MIPS_xxx flags. So consider both 6252 // cases separately. 6253 if ((Symbol->st_other & STO_MIPS_MIPS16) == STO_MIPS_MIPS16) 6254 SymOtherFlags.insert(SymOtherFlags.end(), 6255 std::begin(ElfMips16SymOtherFlags), 6256 std::end(ElfMips16SymOtherFlags)); 6257 else 6258 SymOtherFlags.insert(SymOtherFlags.end(), 6259 std::begin(ElfMipsSymOtherFlags), 6260 std::end(ElfMipsSymOtherFlags)); 6261 } 6262 W.printFlags("Other", Symbol->st_other, makeArrayRef(SymOtherFlags), 0x3u); 6263 } 6264 printSymbolSection(Symbol, First); 6265 } 6266 6267 template <class ELFT> 6268 void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 6269 bool PrintDynamicSymbols) { 6270 if (PrintSymbols) 6271 printSymbols(Obj); 6272 if (PrintDynamicSymbols) 6273 printDynamicSymbols(Obj); 6274 } 6275 6276 template <class ELFT> void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj) { 6277 ListScope Group(W, "Symbols"); 6278 this->dumper()->printSymbolsHelper(false); 6279 } 6280 6281 template <class ELFT> 6282 void LLVMStyle<ELFT>::printDynamicSymbols(const ELFO *Obj) { 6283 ListScope Group(W, "DynamicSymbols"); 6284 this->dumper()->printSymbolsHelper(true); 6285 } 6286 6287 template <class ELFT> void LLVMStyle<ELFT>::printDynamic(const ELFFile<ELFT> *Obj) { 6288 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 6289 if (Table.empty()) 6290 return; 6291 6292 W.startLine() << "DynamicSection [ (" << Table.size() << " entries)\n"; 6293 6294 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table); 6295 // The "Name/Value" column should be indented from the "Type" column by N 6296 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 6297 // space (1) = -3. 6298 W.startLine() << " Tag" << std::string(ELFT::Is64Bits ? 16 : 8, ' ') 6299 << "Type" << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 6300 6301 std::string ValueFmt = "%-" + std::to_string(MaxTagSize) + "s "; 6302 for (auto Entry : Table) { 6303 uintX_t Tag = Entry.getTag(); 6304 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 6305 W.startLine() << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10, true) 6306 << " " 6307 << format(ValueFmt.c_str(), 6308 Obj->getDynamicTagAsString(Tag).c_str()) 6309 << Value << "\n"; 6310 } 6311 W.startLine() << "]\n"; 6312 } 6313 6314 template <class ELFT> 6315 void LLVMStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 6316 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 6317 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 6318 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 6319 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 6320 if (DynRelRegion.Size && DynRelaRegion.Size) 6321 report_fatal_error("There are both REL and RELA dynamic relocations"); 6322 W.startLine() << "Dynamic Relocations {\n"; 6323 W.indent(); 6324 if (DynRelaRegion.Size > 0) 6325 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 6326 printDynamicRelocation(Obj, Rela); 6327 else 6328 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 6329 Elf_Rela Rela; 6330 Rela.r_offset = Rel.r_offset; 6331 Rela.r_info = Rel.r_info; 6332 Rela.r_addend = 0; 6333 printDynamicRelocation(Obj, Rela); 6334 } 6335 if (DynRelrRegion.Size > 0) { 6336 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 6337 std::vector<Elf_Rela> RelrRelas = 6338 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 6339 for (const Elf_Rela &Rela : RelrRelas) 6340 printDynamicRelocation(Obj, Rela); 6341 } 6342 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) 6343 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 6344 printDynamicRelocation(Obj, Rela); 6345 else 6346 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 6347 Elf_Rela Rela; 6348 Rela.r_offset = Rel.r_offset; 6349 Rela.r_info = Rel.r_info; 6350 Rela.r_addend = 0; 6351 printDynamicRelocation(Obj, Rela); 6352 } 6353 W.unindent(); 6354 W.startLine() << "}\n"; 6355 } 6356 6357 template <class ELFT> 6358 void LLVMStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel) { 6359 SmallString<32> RelocName; 6360 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 6361 std::string SymbolName = 6362 getSymbolForReloc(Obj, this->FileName, this->dumper(), Rel).Name; 6363 6364 if (opts::ExpandRelocs) { 6365 DictScope Group(W, "Relocation"); 6366 W.printHex("Offset", Rel.r_offset); 6367 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 6368 W.printString("Symbol", !SymbolName.empty() ? SymbolName : "-"); 6369 W.printHex("Addend", Rel.r_addend); 6370 } else { 6371 raw_ostream &OS = W.startLine(); 6372 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 6373 << (!SymbolName.empty() ? SymbolName : "-") << " " << W.hex(Rel.r_addend) 6374 << "\n"; 6375 } 6376 } 6377 6378 template <class ELFT> 6379 void LLVMStyle<ELFT>::printProgramHeaders( 6380 const ELFO *Obj, bool PrintProgramHeaders, 6381 cl::boolOrDefault PrintSectionMapping) { 6382 if (PrintProgramHeaders) 6383 printProgramHeaders(Obj); 6384 if (PrintSectionMapping == cl::BOU_TRUE) 6385 printSectionMapping(Obj); 6386 } 6387 6388 template <class ELFT> 6389 void LLVMStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 6390 ListScope L(W, "ProgramHeaders"); 6391 6392 for (const Elf_Phdr &Phdr : 6393 unwrapOrError(this->FileName, Obj->program_headers())) { 6394 DictScope P(W, "ProgramHeader"); 6395 W.printHex("Type", 6396 getElfSegmentType(Obj->getHeader()->e_machine, Phdr.p_type), 6397 Phdr.p_type); 6398 W.printHex("Offset", Phdr.p_offset); 6399 W.printHex("VirtualAddress", Phdr.p_vaddr); 6400 W.printHex("PhysicalAddress", Phdr.p_paddr); 6401 W.printNumber("FileSize", Phdr.p_filesz); 6402 W.printNumber("MemSize", Phdr.p_memsz); 6403 W.printFlags("Flags", Phdr.p_flags, makeArrayRef(ElfSegmentFlags)); 6404 W.printNumber("Alignment", Phdr.p_align); 6405 } 6406 } 6407 6408 template <class ELFT> 6409 void LLVMStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 6410 const Elf_Shdr *Sec) { 6411 ListScope SS(W, "VersionSymbols"); 6412 if (!Sec) 6413 return; 6414 6415 StringRef StrTable; 6416 ArrayRef<Elf_Sym> Syms; 6417 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 6418 this->dumper()->getVersionTable(Sec, &Syms, &StrTable); 6419 if (!VerTableOrErr) { 6420 this->reportUniqueWarning(VerTableOrErr.takeError()); 6421 return; 6422 } 6423 6424 if (StrTable.empty() || Syms.empty() || Syms.size() != VerTableOrErr->size()) 6425 return; 6426 6427 for (size_t I = 0, E = Syms.size(); I < E; ++I) { 6428 DictScope S(W, "Symbol"); 6429 W.printNumber("Version", (*VerTableOrErr)[I].vs_index & VERSYM_VERSION); 6430 W.printString("Name", this->dumper()->getFullSymbolName( 6431 &Syms[I], StrTable, /*IsDynamic=*/true)); 6432 } 6433 } 6434 6435 template <class ELFT> 6436 void LLVMStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 6437 const Elf_Shdr *Sec) { 6438 ListScope SD(W, "VersionDefinitions"); 6439 if (!Sec) 6440 return; 6441 6442 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 6443 if (!V) { 6444 this->reportUniqueWarning(V.takeError()); 6445 return; 6446 } 6447 6448 for (const VerDef &D : *V) { 6449 DictScope Def(W, "Definition"); 6450 W.printNumber("Version", D.Version); 6451 W.printFlags("Flags", D.Flags, makeArrayRef(SymVersionFlags)); 6452 W.printNumber("Index", D.Ndx); 6453 W.printNumber("Hash", D.Hash); 6454 W.printString("Name", D.Name.c_str()); 6455 W.printList( 6456 "Predecessors", D.AuxV, 6457 [](raw_ostream &OS, const VerdAux &Aux) { OS << Aux.Name.c_str(); }); 6458 } 6459 } 6460 6461 template <class ELFT> 6462 void LLVMStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 6463 const Elf_Shdr *Sec) { 6464 ListScope SD(W, "VersionRequirements"); 6465 if (!Sec) 6466 return; 6467 6468 Expected<std::vector<VerNeed>> V = 6469 this->dumper()->getVersionDependencies(Sec); 6470 if (!V) { 6471 this->reportUniqueWarning(V.takeError()); 6472 return; 6473 } 6474 6475 for (const VerNeed &VN : *V) { 6476 DictScope Entry(W, "Dependency"); 6477 W.printNumber("Version", VN.Version); 6478 W.printNumber("Count", VN.Cnt); 6479 W.printString("FileName", VN.File.c_str()); 6480 6481 ListScope L(W, "Entries"); 6482 for (const VernAux &Aux : VN.AuxV) { 6483 DictScope Entry(W, "Entry"); 6484 W.printNumber("Hash", Aux.Hash); 6485 W.printFlags("Flags", Aux.Flags, makeArrayRef(SymVersionFlags)); 6486 W.printNumber("Index", Aux.Other); 6487 W.printString("Name", Aux.Name.c_str()); 6488 } 6489 } 6490 } 6491 6492 template <class ELFT> 6493 void LLVMStyle<ELFT>::printHashHistograms(const ELFFile<ELFT> *Obj) { 6494 W.startLine() << "Hash Histogram not implemented!\n"; 6495 } 6496 6497 template <class ELFT> 6498 void LLVMStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 6499 ListScope L(W, "CGProfile"); 6500 if (!this->dumper()->getDotCGProfileSec()) 6501 return; 6502 auto CGProfile = unwrapOrError( 6503 this->FileName, Obj->template getSectionContentsAsArray<Elf_CGProfile>( 6504 this->dumper()->getDotCGProfileSec())); 6505 for (const Elf_CGProfile &CGPE : CGProfile) { 6506 DictScope D(W, "CGProfileEntry"); 6507 W.printNumber( 6508 "From", 6509 unwrapOrError(this->FileName, 6510 this->dumper()->getStaticSymbolName(CGPE.cgp_from)), 6511 CGPE.cgp_from); 6512 W.printNumber( 6513 "To", 6514 unwrapOrError(this->FileName, 6515 this->dumper()->getStaticSymbolName(CGPE.cgp_to)), 6516 CGPE.cgp_to); 6517 W.printNumber("Weight", CGPE.cgp_weight); 6518 } 6519 } 6520 6521 static Expected<std::vector<uint64_t>> toULEB128Array(ArrayRef<uint8_t> Data) { 6522 std::vector<uint64_t> Ret; 6523 const uint8_t *Cur = Data.begin(); 6524 const uint8_t *End = Data.end(); 6525 while (Cur != End) { 6526 unsigned Size; 6527 const char *Err; 6528 Ret.push_back(decodeULEB128(Cur, &Size, End, &Err)); 6529 if (Err) 6530 return createError(Err); 6531 Cur += Size; 6532 } 6533 return Ret; 6534 } 6535 6536 template <class ELFT> 6537 void LLVMStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 6538 ListScope L(W, "Addrsig"); 6539 if (!this->dumper()->getDotAddrsigSec()) 6540 return; 6541 ArrayRef<uint8_t> Contents = unwrapOrError( 6542 this->FileName, 6543 Obj->getSectionContents(this->dumper()->getDotAddrsigSec())); 6544 Expected<std::vector<uint64_t>> V = toULEB128Array(Contents); 6545 if (!V) { 6546 reportWarning(V.takeError(), this->FileName); 6547 return; 6548 } 6549 6550 for (uint64_t Sym : *V) { 6551 Expected<std::string> NameOrErr = this->dumper()->getStaticSymbolName(Sym); 6552 if (NameOrErr) { 6553 W.printNumber("Sym", *NameOrErr, Sym); 6554 continue; 6555 } 6556 reportWarning(NameOrErr.takeError(), this->FileName); 6557 W.printNumber("Sym", "<?>", Sym); 6558 } 6559 } 6560 6561 template <typename ELFT> 6562 static void printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc, 6563 ScopedPrinter &W) { 6564 switch (NoteType) { 6565 default: 6566 return; 6567 case ELF::NT_GNU_ABI_TAG: { 6568 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 6569 if (!AbiTag.IsValid) { 6570 W.printString("ABI", "<corrupt GNU_ABI_TAG>"); 6571 } else { 6572 W.printString("OS", AbiTag.OSName); 6573 W.printString("ABI", AbiTag.ABI); 6574 } 6575 break; 6576 } 6577 case ELF::NT_GNU_BUILD_ID: { 6578 W.printString("Build ID", getGNUBuildId(Desc)); 6579 break; 6580 } 6581 case ELF::NT_GNU_GOLD_VERSION: 6582 W.printString("Version", getGNUGoldVersion(Desc)); 6583 break; 6584 case ELF::NT_GNU_PROPERTY_TYPE_0: 6585 ListScope D(W, "Property"); 6586 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 6587 W.printString(Property); 6588 break; 6589 } 6590 } 6591 6592 static void printCoreNoteLLVMStyle(const CoreNote &Note, ScopedPrinter &W) { 6593 W.printNumber("Page Size", Note.PageSize); 6594 for (const CoreFileMapping &Mapping : Note.Mappings) { 6595 ListScope D(W, "Mapping"); 6596 W.printHex("Start", Mapping.Start); 6597 W.printHex("End", Mapping.End); 6598 W.printHex("Offset", Mapping.Offset); 6599 W.printString("Filename", Mapping.Filename); 6600 } 6601 } 6602 6603 template <class ELFT> 6604 void LLVMStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 6605 ListScope L(W, "Notes"); 6606 6607 auto PrintHeader = [&](Optional<StringRef> SecName, 6608 const typename ELFT::Off Offset, 6609 const typename ELFT::Addr Size) { 6610 W.printString("Name", SecName ? *SecName : "<?>"); 6611 W.printHex("Offset", Offset); 6612 W.printHex("Size", Size); 6613 }; 6614 6615 auto ProcessNote = [&](const Elf_Note &Note) { 6616 DictScope D2(W, "Note"); 6617 StringRef Name = Note.getName(); 6618 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 6619 Elf_Word Type = Note.getType(); 6620 6621 // Print the note owner/type. 6622 W.printString("Owner", Name); 6623 W.printHex("Data size", Descriptor.size()); 6624 if (Name == "GNU") { 6625 W.printString("Type", getGNUNoteTypeName(Type)); 6626 } else if (Name == "FreeBSD") { 6627 W.printString("Type", getFreeBSDNoteTypeName(Type)); 6628 } else if (Name == "AMD") { 6629 W.printString("Type", getAMDNoteTypeName(Type)); 6630 } else if (Name == "AMDGPU") { 6631 W.printString("Type", getAMDGPUNoteTypeName(Type)); 6632 } else { 6633 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 6634 ? getCoreNoteTypeName(Type) 6635 : getGenericNoteTypeName(Type); 6636 if (!NoteType.empty()) 6637 W.printString("Type", NoteType); 6638 else 6639 W.printString("Type", 6640 "Unknown (" + to_string(format_hex(Type, 10)) + ")"); 6641 } 6642 6643 // Print the description, or fallback to printing raw bytes for unknown 6644 // owners. 6645 if (Name == "GNU") { 6646 printGNUNoteLLVMStyle<ELFT>(Type, Descriptor, W); 6647 } else if (Name == "AMD") { 6648 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 6649 if (!N.Type.empty()) 6650 W.printString(N.Type, N.Value); 6651 } else if (Name == "AMDGPU") { 6652 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 6653 if (!N.Type.empty()) 6654 W.printString(N.Type, N.Value); 6655 } else if (Name == "CORE") { 6656 if (Type == ELF::NT_FILE) { 6657 DataExtractor DescExtractor(Descriptor, 6658 ELFT::TargetEndianness == support::little, 6659 sizeof(Elf_Addr)); 6660 Expected<CoreNote> Note = readCoreNote(DescExtractor); 6661 if (Note) 6662 printCoreNoteLLVMStyle(*Note, W); 6663 else 6664 reportWarning(Note.takeError(), this->FileName); 6665 } 6666 } else if (!Descriptor.empty()) { 6667 W.printBinaryBlock("Description data", Descriptor); 6668 } 6669 }; 6670 6671 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 6672 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 6673 for (const auto &S : Sections) { 6674 if (S.sh_type != SHT_NOTE) 6675 continue; 6676 DictScope D(W, "NoteSection"); 6677 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 6678 S.sh_size); 6679 Error Err = Error::success(); 6680 for (auto Note : Obj->notes(S, Err)) 6681 ProcessNote(Note); 6682 if (Err) 6683 reportError(std::move(Err), this->FileName); 6684 } 6685 } else { 6686 for (const auto &P : 6687 unwrapOrError(this->FileName, Obj->program_headers())) { 6688 if (P.p_type != PT_NOTE) 6689 continue; 6690 DictScope D(W, "NoteSection"); 6691 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 6692 Error Err = Error::success(); 6693 for (auto Note : Obj->notes(P, Err)) 6694 ProcessNote(Note); 6695 if (Err) 6696 reportError(std::move(Err), this->FileName); 6697 } 6698 } 6699 } 6700 6701 template <class ELFT> 6702 void LLVMStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 6703 ListScope L(W, "LinkerOptions"); 6704 6705 unsigned I = -1; 6706 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 6707 ++I; 6708 if (Shdr.sh_type != ELF::SHT_LLVM_LINKER_OPTIONS) 6709 continue; 6710 6711 ArrayRef<uint8_t> Contents = 6712 unwrapOrError(this->FileName, Obj->getSectionContents(&Shdr)); 6713 if (Contents.empty()) 6714 continue; 6715 6716 if (Contents.back() != 0) { 6717 reportWarning(createError("SHT_LLVM_LINKER_OPTIONS section at index " + 6718 Twine(I) + 6719 " is broken: the " 6720 "content is not null-terminated"), 6721 this->FileName); 6722 continue; 6723 } 6724 6725 SmallVector<StringRef, 16> Strings; 6726 toStringRef(Contents.drop_back()).split(Strings, '\0'); 6727 if (Strings.size() % 2 != 0) { 6728 reportWarning( 6729 createError( 6730 "SHT_LLVM_LINKER_OPTIONS section at index " + Twine(I) + 6731 " is broken: an incomplete " 6732 "key-value pair was found. The last possible key was: \"" + 6733 Strings.back() + "\""), 6734 this->FileName); 6735 continue; 6736 } 6737 6738 for (size_t I = 0; I < Strings.size(); I += 2) 6739 W.printString(Strings[I], Strings[I + 1]); 6740 } 6741 } 6742 6743 template <class ELFT> 6744 void LLVMStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 6745 ListScope L(W, "DependentLibs"); 6746 this->printDependentLibsHelper( 6747 Obj, [](const Elf_Shdr &) {}, 6748 [this](StringRef Lib, uint64_t) { W.printString(Lib); }); 6749 } 6750 6751 template <class ELFT> 6752 void LLVMStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 6753 ListScope L(W, "StackSizes"); 6754 if (Obj->isRelocatableObject()) 6755 this->printRelocatableStackSizes(Obj, []() {}); 6756 else 6757 this->printNonRelocatableStackSizes(Obj, []() {}); 6758 } 6759 6760 template <class ELFT> 6761 void LLVMStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 6762 DictScope D(W, "Entry"); 6763 W.printString("Function", FuncName); 6764 W.printHex("Size", Size); 6765 } 6766 6767 template <class ELFT> 6768 void LLVMStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 6769 auto PrintEntry = [&](const Elf_Addr *E) { 6770 W.printHex("Address", Parser.getGotAddress(E)); 6771 W.printNumber("Access", Parser.getGotOffset(E)); 6772 W.printHex("Initial", *E); 6773 }; 6774 6775 DictScope GS(W, Parser.IsStatic ? "Static GOT" : "Primary GOT"); 6776 6777 W.printHex("Canonical gp value", Parser.getGp()); 6778 { 6779 ListScope RS(W, "Reserved entries"); 6780 { 6781 DictScope D(W, "Entry"); 6782 PrintEntry(Parser.getGotLazyResolver()); 6783 W.printString("Purpose", StringRef("Lazy resolver")); 6784 } 6785 6786 if (Parser.getGotModulePointer()) { 6787 DictScope D(W, "Entry"); 6788 PrintEntry(Parser.getGotModulePointer()); 6789 W.printString("Purpose", StringRef("Module pointer (GNU extension)")); 6790 } 6791 } 6792 { 6793 ListScope LS(W, "Local entries"); 6794 for (auto &E : Parser.getLocalEntries()) { 6795 DictScope D(W, "Entry"); 6796 PrintEntry(&E); 6797 } 6798 } 6799 6800 if (Parser.IsStatic) 6801 return; 6802 6803 { 6804 ListScope GS(W, "Global entries"); 6805 for (auto &E : Parser.getGlobalEntries()) { 6806 DictScope D(W, "Entry"); 6807 6808 PrintEntry(&E); 6809 6810 const Elf_Sym *Sym = Parser.getGotSym(&E); 6811 W.printHex("Value", Sym->st_value); 6812 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6813 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6814 6815 std::string SymName = this->dumper()->getFullSymbolName( 6816 Sym, this->dumper()->getDynamicStringTable(), true); 6817 W.printNumber("Name", SymName, Sym->st_name); 6818 } 6819 } 6820 6821 W.printNumber("Number of TLS and multi-GOT entries", 6822 uint64_t(Parser.getOtherEntries().size())); 6823 } 6824 6825 template <class ELFT> 6826 void LLVMStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 6827 auto PrintEntry = [&](const Elf_Addr *E) { 6828 W.printHex("Address", Parser.getPltAddress(E)); 6829 W.printHex("Initial", *E); 6830 }; 6831 6832 DictScope GS(W, "PLT GOT"); 6833 6834 { 6835 ListScope RS(W, "Reserved entries"); 6836 { 6837 DictScope D(W, "Entry"); 6838 PrintEntry(Parser.getPltLazyResolver()); 6839 W.printString("Purpose", StringRef("PLT lazy resolver")); 6840 } 6841 6842 if (auto E = Parser.getPltModulePointer()) { 6843 DictScope D(W, "Entry"); 6844 PrintEntry(E); 6845 W.printString("Purpose", StringRef("Module pointer")); 6846 } 6847 } 6848 { 6849 ListScope LS(W, "Entries"); 6850 for (auto &E : Parser.getPltEntries()) { 6851 DictScope D(W, "Entry"); 6852 PrintEntry(&E); 6853 6854 const Elf_Sym *Sym = Parser.getPltSym(&E); 6855 W.printHex("Value", Sym->st_value); 6856 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6857 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6858 6859 std::string SymName = 6860 this->dumper()->getFullSymbolName(Sym, Parser.getPltStrTable(), true); 6861 W.printNumber("Name", SymName, Sym->st_name); 6862 } 6863 } 6864 } 6865 6866 template <class ELFT> 6867 void LLVMStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 6868 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 6869 const Elf_Shdr *Shdr = 6870 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 6871 if (!Shdr) { 6872 W.startLine() << "There is no .MIPS.abiflags section in the file.\n"; 6873 return; 6874 } 6875 ArrayRef<uint8_t> Sec = 6876 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 6877 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) { 6878 W.startLine() << "The .MIPS.abiflags section has a wrong size.\n"; 6879 return; 6880 } 6881 6882 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 6883 6884 raw_ostream &OS = W.getOStream(); 6885 DictScope GS(W, "MIPS ABI Flags"); 6886 6887 W.printNumber("Version", Flags->version); 6888 W.startLine() << "ISA: "; 6889 if (Flags->isa_rev <= 1) 6890 OS << format("MIPS%u", Flags->isa_level); 6891 else 6892 OS << format("MIPS%ur%u", Flags->isa_level, Flags->isa_rev); 6893 OS << "\n"; 6894 W.printEnum("ISA Extension", Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)); 6895 W.printFlags("ASEs", Flags->ases, makeArrayRef(ElfMipsASEFlags)); 6896 W.printEnum("FP ABI", Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)); 6897 W.printNumber("GPR size", getMipsRegisterSize(Flags->gpr_size)); 6898 W.printNumber("CPR1 size", getMipsRegisterSize(Flags->cpr1_size)); 6899 W.printNumber("CPR2 size", getMipsRegisterSize(Flags->cpr2_size)); 6900 W.printFlags("Flags 1", Flags->flags1, makeArrayRef(ElfMipsFlags1)); 6901 W.printHex("Flags 2", Flags->flags2); 6902 } 6903