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 printHashHistogram() 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 Elf_Sym_Range dynamic_symbols() const { 329 if (!DynSymRegion) 330 return Elf_Sym_Range(); 331 return DynSymRegion->getAsArrayRef<Elf_Sym>(); 332 } 333 334 Elf_Rel_Range dyn_rels() const; 335 Elf_Rela_Range dyn_relas() const; 336 Elf_Relr_Range dyn_relrs() const; 337 std::string getFullSymbolName(const Elf_Sym *Symbol, StringRef StrTable, 338 bool IsDynamic) const; 339 Expected<unsigned> getSymbolSectionIndex(const Elf_Sym *Symbol, 340 const Elf_Sym *FirstSym) const; 341 Expected<StringRef> getSymbolSectionName(const Elf_Sym *Symbol, 342 unsigned SectionIndex) const; 343 Expected<std::string> getStaticSymbolName(uint32_t Index) const; 344 StringRef getDynamicString(uint64_t Value) const; 345 Expected<StringRef> getSymbolVersionByIndex(uint32_t VersionSymbolIndex, 346 bool &IsDefault) const; 347 348 void printSymbolsHelper(bool IsDynamic) const; 349 std::string getDynamicEntry(uint64_t Type, uint64_t Value) const; 350 351 const Elf_Shdr *getDotSymtabSec() const { return DotSymtabSec; } 352 const Elf_Shdr *getDotCGProfileSec() const { return DotCGProfileSec; } 353 const Elf_Shdr *getDotAddrsigSec() const { return DotAddrsigSec; } 354 ArrayRef<Elf_Word> getShndxTable() const { return ShndxTable; } 355 StringRef getDynamicStringTable() const { return DynamicStringTable; } 356 const DynRegionInfo &getDynRelRegion() const { return DynRelRegion; } 357 const DynRegionInfo &getDynRelaRegion() const { return DynRelaRegion; } 358 const DynRegionInfo &getDynRelrRegion() const { return DynRelrRegion; } 359 const DynRegionInfo &getDynPLTRelRegion() const { return DynPLTRelRegion; } 360 const DynRegionInfo &getDynamicTableRegion() const { return DynamicTable; } 361 const Elf_Hash *getHashTable() const { return HashTable; } 362 const Elf_GnuHash *getGnuHashTable() const { return GnuHashTable; } 363 364 Expected<ArrayRef<Elf_Versym>> getVersionTable(const Elf_Shdr *Sec, 365 ArrayRef<Elf_Sym> *SymTab, 366 StringRef *StrTab) const; 367 Expected<std::vector<VerDef>> 368 getVersionDefinitions(const Elf_Shdr *Sec) const; 369 Expected<std::vector<VerNeed>> 370 getVersionDependencies(const Elf_Shdr *Sec) const; 371 372 Expected<std::pair<const Elf_Sym *, std::string>> 373 getRelocationTarget(const Elf_Shdr *SymTab, const Elf_Rela &R) const; 374 375 std::function<Error(const Twine &Msg)> WarningHandler; 376 void reportUniqueWarning(Error Err) const; 377 }; 378 379 template <class ELFT> 380 static Expected<StringRef> getLinkAsStrtab(const ELFFile<ELFT> *Obj, 381 const typename ELFT::Shdr *Sec, 382 unsigned SecNdx) { 383 Expected<const typename ELFT::Shdr *> StrTabSecOrErr = 384 Obj->getSection(Sec->sh_link); 385 if (!StrTabSecOrErr) 386 return createError("invalid section linked to " + 387 object::getELFSectionTypeName( 388 Obj->getHeader()->e_machine, Sec->sh_type) + 389 " section with index " + Twine(SecNdx) + ": " + 390 toString(StrTabSecOrErr.takeError())); 391 392 Expected<StringRef> StrTabOrErr = Obj->getStringTable(*StrTabSecOrErr); 393 if (!StrTabOrErr) 394 return createError("invalid string table linked to " + 395 object::getELFSectionTypeName( 396 Obj->getHeader()->e_machine, Sec->sh_type) + 397 " section with index " + Twine(SecNdx) + ": " + 398 toString(StrTabOrErr.takeError())); 399 return *StrTabOrErr; 400 } 401 402 // Returns the linked symbol table and associated string table for a given section. 403 template <class ELFT> 404 static Expected<std::pair<typename ELFT::SymRange, StringRef>> 405 getLinkAsSymtab(const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec, 406 unsigned SecNdx, unsigned ExpectedType) { 407 Expected<const typename ELFT::Shdr *> SymtabOrErr = 408 Obj->getSection(Sec->sh_link); 409 if (!SymtabOrErr) 410 return createError("invalid section linked to " + 411 object::getELFSectionTypeName( 412 Obj->getHeader()->e_machine, Sec->sh_type) + 413 " section with index " + Twine(SecNdx) + ": " + 414 toString(SymtabOrErr.takeError())); 415 416 if ((*SymtabOrErr)->sh_type != ExpectedType) 417 return createError( 418 "invalid section linked to " + 419 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 420 Sec->sh_type) + 421 " section with index " + Twine(SecNdx) + ": expected " + 422 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 423 ExpectedType) + 424 ", but got " + 425 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 426 (*SymtabOrErr)->sh_type)); 427 428 Expected<StringRef> StrTabOrErr = 429 getLinkAsStrtab(Obj, *SymtabOrErr, Sec->sh_link); 430 if (!StrTabOrErr) 431 return createError( 432 "can't get a string table for the symbol table linked to " + 433 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 434 Sec->sh_type) + 435 " section with index " + Twine(SecNdx) + ": " + 436 toString(StrTabOrErr.takeError())); 437 438 Expected<typename ELFT::SymRange> SymsOrErr = Obj->symbols(*SymtabOrErr); 439 if (!SymsOrErr) 440 return createError( 441 "unable to read symbols from the symbol table with index " + 442 Twine(Sec->sh_link) + ": " + toString(SymsOrErr.takeError())); 443 444 return std::make_pair(*SymsOrErr, *StrTabOrErr); 445 } 446 447 template <class ELFT> 448 Expected<ArrayRef<typename ELFT::Versym>> 449 ELFDumper<ELFT>::getVersionTable(const Elf_Shdr *Sec, ArrayRef<Elf_Sym> *SymTab, 450 StringRef *StrTab) const { 451 assert((!SymTab && !StrTab) || (SymTab && StrTab)); 452 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 453 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 454 455 if (uintptr_t(Obj->base() + Sec->sh_offset) % sizeof(uint16_t) != 0) 456 return createError("the SHT_GNU_versym section with index " + 457 Twine(SecNdx) + " is misaligned"); 458 459 Expected<ArrayRef<Elf_Versym>> VersionsOrErr = 460 Obj->template getSectionContentsAsArray<Elf_Versym>(Sec); 461 if (!VersionsOrErr) 462 return createError( 463 "cannot read content of SHT_GNU_versym section with index " + 464 Twine(SecNdx) + ": " + toString(VersionsOrErr.takeError())); 465 466 Expected<std::pair<ArrayRef<Elf_Sym>, StringRef>> SymTabOrErr = 467 getLinkAsSymtab(Obj, Sec, SecNdx, SHT_DYNSYM); 468 if (!SymTabOrErr) { 469 reportUniqueWarning(SymTabOrErr.takeError()); 470 return *VersionsOrErr; 471 } 472 473 if (SymTabOrErr->first.size() != VersionsOrErr->size()) 474 reportUniqueWarning( 475 createError("SHT_GNU_versym section with index " + Twine(SecNdx) + 476 ": the number of entries (" + Twine(VersionsOrErr->size()) + 477 ") does not match the number of symbols (" + 478 Twine(SymTabOrErr->first.size()) + 479 ") in the symbol table with index " + Twine(Sec->sh_link))); 480 481 if (SymTab) 482 std::tie(*SymTab, *StrTab) = *SymTabOrErr; 483 return *VersionsOrErr; 484 } 485 486 template <class ELFT> 487 Expected<std::vector<VerDef>> 488 ELFDumper<ELFT>::getVersionDefinitions(const Elf_Shdr *Sec) const { 489 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 490 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 491 492 Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx); 493 if (!StrTabOrErr) 494 return StrTabOrErr.takeError(); 495 496 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec); 497 if (!ContentsOrErr) 498 return createError( 499 "cannot read content of SHT_GNU_verdef section with index " + 500 Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError())); 501 502 const uint8_t *Start = ContentsOrErr->data(); 503 const uint8_t *End = Start + ContentsOrErr->size(); 504 505 auto ExtractNextAux = [&](const uint8_t *&VerdauxBuf, 506 unsigned VerDefNdx) -> Expected<VerdAux> { 507 if (VerdauxBuf + sizeof(Elf_Verdaux) > End) 508 return createError("invalid SHT_GNU_verdef section with index " + 509 Twine(SecNdx) + ": version definition " + 510 Twine(VerDefNdx) + 511 " refers to an auxiliary entry that goes past the end " 512 "of the section"); 513 514 auto *Verdaux = reinterpret_cast<const Elf_Verdaux *>(VerdauxBuf); 515 VerdauxBuf += Verdaux->vda_next; 516 517 VerdAux Aux; 518 Aux.Offset = VerdauxBuf - Start; 519 if (Verdaux->vda_name <= StrTabOrErr->size()) 520 Aux.Name = std::string(StrTabOrErr->drop_front(Verdaux->vda_name)); 521 else 522 Aux.Name = "<invalid vda_name: " + to_string(Verdaux->vda_name) + ">"; 523 return Aux; 524 }; 525 526 std::vector<VerDef> Ret; 527 const uint8_t *VerdefBuf = Start; 528 for (unsigned I = 1; I <= /*VerDefsNum=*/Sec->sh_info; ++I) { 529 if (VerdefBuf + sizeof(Elf_Verdef) > End) 530 return createError("invalid SHT_GNU_verdef section with index " + 531 Twine(SecNdx) + ": version definition " + Twine(I) + 532 " goes past the end of the section"); 533 534 if (uintptr_t(VerdefBuf) % sizeof(uint32_t) != 0) 535 return createError( 536 "invalid SHT_GNU_verdef section with index " + Twine(SecNdx) + 537 ": found a misaligned version definition entry at offset 0x" + 538 Twine::utohexstr(VerdefBuf - Start)); 539 540 unsigned Version = *reinterpret_cast<const Elf_Half *>(VerdefBuf); 541 if (Version != 1) 542 return createError("unable to dump SHT_GNU_verdef section with index " + 543 Twine(SecNdx) + ": version " + Twine(Version) + 544 " is not yet supported"); 545 546 const Elf_Verdef *D = reinterpret_cast<const Elf_Verdef *>(VerdefBuf); 547 VerDef &VD = *Ret.emplace(Ret.end()); 548 VD.Offset = VerdefBuf - Start; 549 VD.Version = D->vd_version; 550 VD.Flags = D->vd_flags; 551 VD.Ndx = D->vd_ndx; 552 VD.Cnt = D->vd_cnt; 553 VD.Hash = D->vd_hash; 554 555 const uint8_t *VerdauxBuf = VerdefBuf + D->vd_aux; 556 for (unsigned J = 0; J < D->vd_cnt; ++J) { 557 if (uintptr_t(VerdauxBuf) % sizeof(uint32_t) != 0) 558 return createError("invalid SHT_GNU_verdef section with index " + 559 Twine(SecNdx) + 560 ": found a misaligned auxiliary entry at offset 0x" + 561 Twine::utohexstr(VerdauxBuf - Start)); 562 563 Expected<VerdAux> AuxOrErr = ExtractNextAux(VerdauxBuf, I); 564 if (!AuxOrErr) 565 return AuxOrErr.takeError(); 566 567 if (J == 0) 568 VD.Name = AuxOrErr->Name; 569 else 570 VD.AuxV.push_back(*AuxOrErr); 571 } 572 573 VerdefBuf += D->vd_next; 574 } 575 576 return Ret; 577 } 578 579 template <class ELFT> 580 Expected<std::vector<VerNeed>> 581 ELFDumper<ELFT>::getVersionDependencies(const Elf_Shdr *Sec) const { 582 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 583 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 584 585 StringRef StrTab; 586 Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx); 587 if (!StrTabOrErr) 588 reportUniqueWarning(StrTabOrErr.takeError()); 589 else 590 StrTab = *StrTabOrErr; 591 592 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec); 593 if (!ContentsOrErr) 594 return createError( 595 "cannot read content of SHT_GNU_verneed section with index " + 596 Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError())); 597 598 const uint8_t *Start = ContentsOrErr->data(); 599 const uint8_t *End = Start + ContentsOrErr->size(); 600 const uint8_t *VerneedBuf = Start; 601 602 std::vector<VerNeed> Ret; 603 for (unsigned I = 1; I <= /*VerneedNum=*/Sec->sh_info; ++I) { 604 if (VerneedBuf + sizeof(Elf_Verdef) > End) 605 return createError("invalid SHT_GNU_verneed section with index " + 606 Twine(SecNdx) + ": version dependency " + Twine(I) + 607 " goes past the end of the section"); 608 609 if (uintptr_t(VerneedBuf) % sizeof(uint32_t) != 0) 610 return createError( 611 "invalid SHT_GNU_verneed section with index " + Twine(SecNdx) + 612 ": found a misaligned version dependency entry at offset 0x" + 613 Twine::utohexstr(VerneedBuf - Start)); 614 615 unsigned Version = *reinterpret_cast<const Elf_Half *>(VerneedBuf); 616 if (Version != 1) 617 return createError("unable to dump SHT_GNU_verneed section with index " + 618 Twine(SecNdx) + ": version " + Twine(Version) + 619 " is not yet supported"); 620 621 const Elf_Verneed *Verneed = 622 reinterpret_cast<const Elf_Verneed *>(VerneedBuf); 623 624 VerNeed &VN = *Ret.emplace(Ret.end()); 625 VN.Version = Verneed->vn_version; 626 VN.Cnt = Verneed->vn_cnt; 627 VN.Offset = VerneedBuf - Start; 628 629 if (Verneed->vn_file < StrTab.size()) 630 VN.File = std::string(StrTab.drop_front(Verneed->vn_file)); 631 else 632 VN.File = "<corrupt vn_file: " + to_string(Verneed->vn_file) + ">"; 633 634 const uint8_t *VernauxBuf = VerneedBuf + Verneed->vn_aux; 635 for (unsigned J = 0; J < Verneed->vn_cnt; ++J) { 636 if (uintptr_t(VernauxBuf) % sizeof(uint32_t) != 0) 637 return createError("invalid SHT_GNU_verneed section with index " + 638 Twine(SecNdx) + 639 ": found a misaligned auxiliary entry at offset 0x" + 640 Twine::utohexstr(VernauxBuf - Start)); 641 642 if (VernauxBuf + sizeof(Elf_Vernaux) > End) 643 return createError( 644 "invalid SHT_GNU_verneed section with index " + Twine(SecNdx) + 645 ": version dependency " + Twine(I) + 646 " refers to an auxiliary entry that goes past the end " 647 "of the section"); 648 649 const Elf_Vernaux *Vernaux = 650 reinterpret_cast<const Elf_Vernaux *>(VernauxBuf); 651 652 VernAux &Aux = *VN.AuxV.emplace(VN.AuxV.end()); 653 Aux.Hash = Vernaux->vna_hash; 654 Aux.Flags = Vernaux->vna_flags; 655 Aux.Other = Vernaux->vna_other; 656 Aux.Offset = VernauxBuf - Start; 657 if (StrTab.size() <= Vernaux->vna_name) 658 Aux.Name = "<corrupt>"; 659 else 660 Aux.Name = std::string(StrTab.drop_front(Vernaux->vna_name)); 661 662 VernauxBuf += Vernaux->vna_next; 663 } 664 VerneedBuf += Verneed->vn_next; 665 } 666 return Ret; 667 } 668 669 template <class ELFT> 670 void ELFDumper<ELFT>::printSymbolsHelper(bool IsDynamic) const { 671 StringRef StrTable, SymtabName; 672 size_t Entries = 0; 673 Elf_Sym_Range Syms(nullptr, nullptr); 674 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 675 if (IsDynamic) { 676 StrTable = DynamicStringTable; 677 Syms = dynamic_symbols(); 678 SymtabName = DynSymtabName; 679 if (DynSymRegion) 680 Entries = DynSymRegion->Size / DynSymRegion->EntSize; 681 } else { 682 if (!DotSymtabSec) 683 return; 684 StrTable = unwrapOrError(ObjF->getFileName(), 685 Obj->getStringTableForSymtab(*DotSymtabSec)); 686 Syms = unwrapOrError(ObjF->getFileName(), Obj->symbols(DotSymtabSec)); 687 SymtabName = 688 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DotSymtabSec)); 689 Entries = DotSymtabSec->getEntityCount(); 690 } 691 if (Syms.begin() == Syms.end()) 692 return; 693 694 // The st_other field has 2 logical parts. The first two bits hold the symbol 695 // visibility (STV_*) and the remainder hold other platform-specific values. 696 bool NonVisibilityBitsUsed = llvm::find_if(Syms, [](const Elf_Sym &S) { 697 return S.st_other & ~0x3; 698 }) != Syms.end(); 699 700 ELFDumperStyle->printSymtabMessage(Obj, SymtabName, Entries, 701 NonVisibilityBitsUsed); 702 for (const auto &Sym : Syms) 703 ELFDumperStyle->printSymbol(Obj, &Sym, Syms.begin(), StrTable, IsDynamic, 704 NonVisibilityBitsUsed); 705 } 706 707 template <class ELFT> class MipsGOTParser; 708 709 template <typename ELFT> class DumpStyle { 710 public: 711 using Elf_Shdr = typename ELFT::Shdr; 712 using Elf_Sym = typename ELFT::Sym; 713 using Elf_Addr = typename ELFT::Addr; 714 715 DumpStyle(ELFDumper<ELFT> *Dumper) : Dumper(Dumper) { 716 FileName = this->Dumper->getElfObject()->getFileName(); 717 } 718 719 virtual ~DumpStyle() = default; 720 721 virtual void printFileHeaders(const ELFFile<ELFT> *Obj) = 0; 722 virtual void printGroupSections(const ELFFile<ELFT> *Obj) = 0; 723 virtual void printRelocations(const ELFFile<ELFT> *Obj) = 0; 724 virtual void printSectionHeaders(const ELFFile<ELFT> *Obj) = 0; 725 virtual void printSymbols(const ELFFile<ELFT> *Obj, bool PrintSymbols, 726 bool PrintDynamicSymbols) = 0; 727 virtual void printHashSymbols(const ELFFile<ELFT> *Obj) {} 728 virtual void printDependentLibs(const ELFFile<ELFT> *Obj) = 0; 729 virtual void printDynamic(const ELFFile<ELFT> *Obj) {} 730 virtual void printDynamicRelocations(const ELFFile<ELFT> *Obj) = 0; 731 virtual void printSymtabMessage(const ELFFile<ELFT> *Obj, StringRef Name, 732 size_t Offset, bool NonVisibilityBitsUsed) {} 733 virtual void printSymbol(const ELFFile<ELFT> *Obj, const Elf_Sym *Symbol, 734 const Elf_Sym *FirstSym, StringRef StrTable, 735 bool IsDynamic, bool NonVisibilityBitsUsed) = 0; 736 virtual void printProgramHeaders(const ELFFile<ELFT> *Obj, 737 bool PrintProgramHeaders, 738 cl::boolOrDefault PrintSectionMapping) = 0; 739 virtual void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 740 const Elf_Shdr *Sec) = 0; 741 virtual void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 742 const Elf_Shdr *Sec) = 0; 743 virtual void printVersionDependencySection(const ELFFile<ELFT> *Obj, 744 const Elf_Shdr *Sec) = 0; 745 virtual void printHashHistogram(const ELFFile<ELFT> *Obj) = 0; 746 virtual void printCGProfile(const ELFFile<ELFT> *Obj) = 0; 747 virtual void printAddrsig(const ELFFile<ELFT> *Obj) = 0; 748 virtual void printNotes(const ELFFile<ELFT> *Obj) = 0; 749 virtual void printELFLinkerOptions(const ELFFile<ELFT> *Obj) = 0; 750 virtual void printStackSizes(const ELFObjectFile<ELFT> *Obj) = 0; 751 void printNonRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj, 752 std::function<void()> PrintHeader); 753 void printRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj, 754 std::function<void()> PrintHeader); 755 void printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, uint64_t SymValue, 756 Optional<SectionRef> FunctionSec, 757 const StringRef SectionName, DataExtractor Data, 758 uint64_t *Offset); 759 void printStackSize(const ELFObjectFile<ELFT> *Obj, RelocationRef Rel, 760 SectionRef FunctionSec, 761 const StringRef &StackSizeSectionName, 762 const RelocationResolver &Resolver, DataExtractor Data); 763 virtual void printStackSizeEntry(uint64_t Size, StringRef FuncName) = 0; 764 virtual void printMipsGOT(const MipsGOTParser<ELFT> &Parser) = 0; 765 virtual void printMipsPLT(const MipsGOTParser<ELFT> &Parser) = 0; 766 virtual void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) = 0; 767 const ELFDumper<ELFT> *dumper() const { return Dumper; } 768 769 protected: 770 void printDependentLibsHelper( 771 const ELFFile<ELFT> *Obj, 772 function_ref<void(const Elf_Shdr &)> OnSectionStart, 773 function_ref<void(StringRef, uint64_t)> OnSectionEntry); 774 775 void reportUniqueWarning(Error Err) const; 776 StringRef FileName; 777 778 private: 779 const ELFDumper<ELFT> *Dumper; 780 }; 781 782 template <typename ELFT> class GNUStyle : public DumpStyle<ELFT> { 783 formatted_raw_ostream &OS; 784 785 public: 786 TYPEDEF_ELF_TYPES(ELFT) 787 788 GNUStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper) 789 : DumpStyle<ELFT>(Dumper), 790 OS(static_cast<formatted_raw_ostream&>(W.getOStream())) { 791 assert (&W.getOStream() == &llvm::fouts()); 792 } 793 794 void printFileHeaders(const ELFO *Obj) override; 795 void printGroupSections(const ELFFile<ELFT> *Obj) override; 796 void printRelocations(const ELFO *Obj) override; 797 void printSectionHeaders(const ELFO *Obj) override; 798 void printSymbols(const ELFO *Obj, bool PrintSymbols, 799 bool PrintDynamicSymbols) override; 800 void printHashSymbols(const ELFO *Obj) override; 801 void printDependentLibs(const ELFFile<ELFT> *Obj) override; 802 void printDynamic(const ELFFile<ELFT> *Obj) override; 803 void printDynamicRelocations(const ELFO *Obj) override; 804 void printSymtabMessage(const ELFO *Obj, StringRef Name, size_t Offset, 805 bool NonVisibilityBitsUsed) override; 806 void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders, 807 cl::boolOrDefault PrintSectionMapping) override; 808 void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 809 const Elf_Shdr *Sec) override; 810 void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 811 const Elf_Shdr *Sec) override; 812 void printVersionDependencySection(const ELFFile<ELFT> *Obj, 813 const Elf_Shdr *Sec) override; 814 void printHashHistogram(const ELFFile<ELFT> *Obj) override; 815 void printCGProfile(const ELFFile<ELFT> *Obj) override; 816 void printAddrsig(const ELFFile<ELFT> *Obj) override; 817 void printNotes(const ELFFile<ELFT> *Obj) override; 818 void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override; 819 void printStackSizes(const ELFObjectFile<ELFT> *Obj) override; 820 void printStackSizeEntry(uint64_t Size, StringRef FuncName) override; 821 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 822 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 823 void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override; 824 825 private: 826 struct Field { 827 std::string Str; 828 unsigned Column; 829 830 Field(StringRef S, unsigned Col) : Str(std::string(S)), Column(Col) {} 831 Field(unsigned Col) : Column(Col) {} 832 }; 833 834 template <typename T, typename TEnum> 835 std::string printEnum(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues) { 836 for (const auto &EnumItem : EnumValues) 837 if (EnumItem.Value == Value) 838 return std::string(EnumItem.AltName); 839 return to_hexString(Value, false); 840 } 841 842 template <typename T, typename TEnum> 843 std::string printFlags(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues, 844 TEnum EnumMask1 = {}, TEnum EnumMask2 = {}, 845 TEnum EnumMask3 = {}) { 846 std::string Str; 847 for (const auto &Flag : EnumValues) { 848 if (Flag.Value == 0) 849 continue; 850 851 TEnum EnumMask{}; 852 if (Flag.Value & EnumMask1) 853 EnumMask = EnumMask1; 854 else if (Flag.Value & EnumMask2) 855 EnumMask = EnumMask2; 856 else if (Flag.Value & EnumMask3) 857 EnumMask = EnumMask3; 858 bool IsEnum = (Flag.Value & EnumMask) != 0; 859 if ((!IsEnum && (Value & Flag.Value) == Flag.Value) || 860 (IsEnum && (Value & EnumMask) == Flag.Value)) { 861 if (!Str.empty()) 862 Str += ", "; 863 Str += Flag.AltName; 864 } 865 } 866 return Str; 867 } 868 869 formatted_raw_ostream &printField(struct Field F) { 870 if (F.Column != 0) 871 OS.PadToColumn(F.Column); 872 OS << F.Str; 873 OS.flush(); 874 return OS; 875 } 876 void printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, uint32_t Sym, 877 StringRef StrTable, uint32_t Bucket); 878 void printRelocHeader(unsigned SType); 879 void printRelocation(const ELFO *Obj, unsigned SecIndex, 880 const Elf_Shdr *SymTab, const Elf_Rela &R, 881 unsigned RelIndex, bool IsRela); 882 void printRelocation(const ELFO *Obj, const Elf_Sym *Sym, 883 StringRef SymbolName, const Elf_Rela &R, bool IsRela); 884 void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First, 885 StringRef StrTable, bool IsDynamic, 886 bool NonVisibilityBitsUsed) override; 887 std::string getSymbolSectionNdx(const ELFO *Obj, const Elf_Sym *Symbol, 888 const Elf_Sym *FirstSym); 889 void printDynamicRelocation(const ELFO *Obj, Elf_Rela R, bool IsRela); 890 void printProgramHeaders(const ELFO *Obj); 891 void printSectionMapping(const ELFO *Obj); 892 void printGNUVersionSectionProlog(const ELFFile<ELFT> *Obj, 893 const typename ELFT::Shdr *Sec, 894 const Twine &Label, unsigned EntriesNum); 895 }; 896 897 template <class ELFT> 898 void ELFDumper<ELFT>::reportUniqueWarning(Error Err) const { 899 handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) { 900 cantFail(WarningHandler(EI.message()), 901 "WarningHandler should always return ErrorSuccess"); 902 }); 903 } 904 905 template <class ELFT> 906 void DumpStyle<ELFT>::reportUniqueWarning(Error Err) const { 907 this->dumper()->reportUniqueWarning(std::move(Err)); 908 } 909 910 template <typename ELFT> class LLVMStyle : public DumpStyle<ELFT> { 911 public: 912 TYPEDEF_ELF_TYPES(ELFT) 913 914 LLVMStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper) 915 : DumpStyle<ELFT>(Dumper), W(W) {} 916 917 void printFileHeaders(const ELFO *Obj) override; 918 void printGroupSections(const ELFFile<ELFT> *Obj) override; 919 void printRelocations(const ELFO *Obj) override; 920 void printRelocations(const Elf_Shdr *Sec, const ELFO *Obj); 921 void printSectionHeaders(const ELFO *Obj) override; 922 void printSymbols(const ELFO *Obj, bool PrintSymbols, 923 bool PrintDynamicSymbols) override; 924 void printDependentLibs(const ELFFile<ELFT> *Obj) override; 925 void printDynamic(const ELFFile<ELFT> *Obj) override; 926 void printDynamicRelocations(const ELFO *Obj) override; 927 void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders, 928 cl::boolOrDefault PrintSectionMapping) override; 929 void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 930 const Elf_Shdr *Sec) override; 931 void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 932 const Elf_Shdr *Sec) override; 933 void printVersionDependencySection(const ELFFile<ELFT> *Obj, 934 const Elf_Shdr *Sec) override; 935 void printHashHistogram(const ELFFile<ELFT> *Obj) override; 936 void printCGProfile(const ELFFile<ELFT> *Obj) override; 937 void printAddrsig(const ELFFile<ELFT> *Obj) override; 938 void printNotes(const ELFFile<ELFT> *Obj) override; 939 void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override; 940 void printStackSizes(const ELFObjectFile<ELFT> *Obj) override; 941 void printStackSizeEntry(uint64_t Size, StringRef FuncName) override; 942 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 943 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 944 void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override; 945 946 private: 947 void printRelocation(const ELFO *Obj, unsigned SecIndex, Elf_Rela Rel, 948 unsigned RelIndex, const Elf_Shdr *SymTab); 949 void printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel); 950 void printSymbols(const ELFO *Obj); 951 void printDynamicSymbols(const ELFO *Obj); 952 void printSymbolSection(const Elf_Sym *Symbol, const Elf_Sym *First); 953 void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First, 954 StringRef StrTable, bool IsDynamic, 955 bool /*NonVisibilityBitsUsed*/) override; 956 void printProgramHeaders(const ELFO *Obj); 957 void printSectionMapping(const ELFO *Obj) {} 958 959 ScopedPrinter &W; 960 }; 961 962 } // end anonymous namespace 963 964 namespace llvm { 965 966 template <class ELFT> 967 static std::error_code createELFDumper(const ELFObjectFile<ELFT> *Obj, 968 ScopedPrinter &Writer, 969 std::unique_ptr<ObjDumper> &Result) { 970 Result.reset(new ELFDumper<ELFT>(Obj, Writer)); 971 return readobj_error::success; 972 } 973 974 std::error_code createELFDumper(const object::ObjectFile *Obj, 975 ScopedPrinter &Writer, 976 std::unique_ptr<ObjDumper> &Result) { 977 // Little-endian 32-bit 978 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj)) 979 return createELFDumper(ELFObj, Writer, Result); 980 981 // Big-endian 32-bit 982 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj)) 983 return createELFDumper(ELFObj, Writer, Result); 984 985 // Little-endian 64-bit 986 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj)) 987 return createELFDumper(ELFObj, Writer, Result); 988 989 // Big-endian 64-bit 990 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj)) 991 return createELFDumper(ELFObj, Writer, Result); 992 993 return readobj_error::unsupported_obj_file_format; 994 } 995 996 } // end namespace llvm 997 998 template <class ELFT> Error ELFDumper<ELFT>::LoadVersionMap() const { 999 // If there is no dynamic symtab or version table, there is nothing to do. 1000 if (!DynSymRegion || !SymbolVersionSection) 1001 return Error::success(); 1002 1003 // Has the VersionMap already been loaded? 1004 if (!VersionMap.empty()) 1005 return Error::success(); 1006 1007 // The first two version indexes are reserved. 1008 // Index 0 is LOCAL, index 1 is GLOBAL. 1009 VersionMap.push_back(VersionEntry()); 1010 VersionMap.push_back(VersionEntry()); 1011 1012 auto InsertEntry = [this](unsigned N, StringRef Version, bool IsVerdef) { 1013 if (N >= VersionMap.size()) 1014 VersionMap.resize(N + 1); 1015 VersionMap[N] = {std::string(Version), IsVerdef}; 1016 }; 1017 1018 if (SymbolVersionDefSection) { 1019 Expected<std::vector<VerDef>> Defs = 1020 this->getVersionDefinitions(SymbolVersionDefSection); 1021 if (!Defs) 1022 return Defs.takeError(); 1023 for (const VerDef &Def : *Defs) 1024 InsertEntry(Def.Ndx & ELF::VERSYM_VERSION, Def.Name, true); 1025 } 1026 1027 if (SymbolVersionNeedSection) { 1028 Expected<std::vector<VerNeed>> Deps = 1029 this->getVersionDependencies(SymbolVersionNeedSection); 1030 if (!Deps) 1031 return Deps.takeError(); 1032 for (const VerNeed &Dep : *Deps) 1033 for (const VernAux &Aux : Dep.AuxV) 1034 InsertEntry(Aux.Other & ELF::VERSYM_VERSION, Aux.Name, false); 1035 } 1036 1037 return Error::success(); 1038 } 1039 1040 template <typename ELFT> 1041 Expected<StringRef> ELFDumper<ELFT>::getSymbolVersion(const Elf_Sym *Sym, 1042 bool &IsDefault) const { 1043 // This is a dynamic symbol. Look in the GNU symbol version table. 1044 if (!SymbolVersionSection) { 1045 // No version table. 1046 IsDefault = false; 1047 return ""; 1048 } 1049 1050 assert(DynSymRegion && "DynSymRegion has not been initialised"); 1051 // Determine the position in the symbol table of this entry. 1052 size_t EntryIndex = (reinterpret_cast<uintptr_t>(Sym) - 1053 reinterpret_cast<uintptr_t>(DynSymRegion->Addr)) / 1054 sizeof(Elf_Sym); 1055 1056 // Get the corresponding version index entry. 1057 const Elf_Versym *Versym = unwrapOrError( 1058 ObjF->getFileName(), ObjF->getELFFile()->template getEntry<Elf_Versym>( 1059 SymbolVersionSection, EntryIndex)); 1060 return this->getSymbolVersionByIndex(Versym->vs_index, IsDefault); 1061 } 1062 1063 template <typename ELFT> 1064 Expected<std::pair<const typename ELFT::Sym *, std::string>> 1065 ELFDumper<ELFT>::getRelocationTarget(const Elf_Shdr *SymTab, 1066 const Elf_Rela &R) const { 1067 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1068 Expected<const Elf_Sym *> SymOrErr = Obj->getRelocationSymbol(&R, SymTab); 1069 if (!SymOrErr) 1070 return SymOrErr.takeError(); 1071 const Elf_Sym *Sym = *SymOrErr; 1072 if (!Sym) 1073 return std::make_pair(nullptr, ""); 1074 1075 // The st_name field of a STT_SECTION is usually 0 (empty string). 1076 // This code block returns the section name. 1077 if (Sym->getType() == ELF::STT_SECTION) { 1078 Expected<const Elf_Shdr *> SecOrErr = 1079 Obj->getSection(Sym, SymTab, ShndxTable); 1080 if (!SecOrErr) 1081 return SecOrErr.takeError(); 1082 1083 Expected<StringRef> NameOrErr = Obj->getSectionName(*SecOrErr); 1084 if (!NameOrErr) 1085 return NameOrErr.takeError(); 1086 return std::make_pair(Sym, NameOrErr->str()); 1087 } 1088 1089 Expected<StringRef> StrTableOrErr = Obj->getStringTableForSymtab(*SymTab); 1090 if (!StrTableOrErr) 1091 return StrTableOrErr.takeError(); 1092 1093 std::string SymbolName = 1094 getFullSymbolName(Sym, *StrTableOrErr, SymTab->sh_type == SHT_DYNSYM); 1095 return std::make_pair(Sym, SymbolName); 1096 } 1097 1098 static std::string maybeDemangle(StringRef Name) { 1099 return opts::Demangle ? demangle(std::string(Name)) : Name.str(); 1100 } 1101 1102 template <typename ELFT> 1103 Expected<std::string> 1104 ELFDumper<ELFT>::getStaticSymbolName(uint32_t Index) const { 1105 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1106 Expected<const typename ELFT::Sym *> SymOrErr = 1107 Obj->getSymbol(DotSymtabSec, Index); 1108 if (!SymOrErr) 1109 return SymOrErr.takeError(); 1110 1111 Expected<StringRef> StrTabOrErr = Obj->getStringTableForSymtab(*DotSymtabSec); 1112 if (!StrTabOrErr) 1113 return StrTabOrErr.takeError(); 1114 1115 Expected<StringRef> NameOrErr = (*SymOrErr)->getName(*StrTabOrErr); 1116 if (!NameOrErr) 1117 return NameOrErr.takeError(); 1118 return maybeDemangle(*NameOrErr); 1119 } 1120 1121 template <typename ELFT> 1122 Expected<StringRef> 1123 ELFDumper<ELFT>::getSymbolVersionByIndex(uint32_t SymbolVersionIndex, 1124 bool &IsDefault) const { 1125 size_t VersionIndex = SymbolVersionIndex & VERSYM_VERSION; 1126 1127 // Special markers for unversioned symbols. 1128 if (VersionIndex == VER_NDX_LOCAL || VersionIndex == VER_NDX_GLOBAL) { 1129 IsDefault = false; 1130 return ""; 1131 } 1132 1133 // Lookup this symbol in the version table. 1134 if (Error E = LoadVersionMap()) 1135 return std::move(E); 1136 if (VersionIndex >= VersionMap.size() || !VersionMap[VersionIndex]) 1137 return createError("SHT_GNU_versym section refers to a version index " + 1138 Twine(VersionIndex) + " which is missing"); 1139 1140 const VersionEntry &Entry = *VersionMap[VersionIndex]; 1141 if (Entry.IsVerDef) 1142 IsDefault = !(SymbolVersionIndex & VERSYM_HIDDEN); 1143 else 1144 IsDefault = false; 1145 return Entry.Name.c_str(); 1146 } 1147 1148 template <typename ELFT> 1149 std::string ELFDumper<ELFT>::getFullSymbolName(const Elf_Sym *Symbol, 1150 StringRef StrTable, 1151 bool IsDynamic) const { 1152 std::string SymbolName = maybeDemangle( 1153 unwrapOrError(ObjF->getFileName(), Symbol->getName(StrTable))); 1154 1155 if (SymbolName.empty() && Symbol->getType() == ELF::STT_SECTION) { 1156 Elf_Sym_Range Syms = unwrapOrError( 1157 ObjF->getFileName(), ObjF->getELFFile()->symbols(DotSymtabSec)); 1158 Expected<unsigned> SectionIndex = 1159 getSymbolSectionIndex(Symbol, Syms.begin()); 1160 if (!SectionIndex) { 1161 reportUniqueWarning(SectionIndex.takeError()); 1162 return "<?>"; 1163 } 1164 Expected<StringRef> NameOrErr = getSymbolSectionName(Symbol, *SectionIndex); 1165 if (!NameOrErr) { 1166 reportUniqueWarning(NameOrErr.takeError()); 1167 return ("<section " + Twine(*SectionIndex) + ">").str(); 1168 } 1169 return std::string(*NameOrErr); 1170 } 1171 1172 if (!IsDynamic) 1173 return SymbolName; 1174 1175 bool IsDefault; 1176 Expected<StringRef> VersionOrErr = getSymbolVersion(&*Symbol, IsDefault); 1177 if (!VersionOrErr) { 1178 reportUniqueWarning(VersionOrErr.takeError()); 1179 return SymbolName + "@<corrupt>"; 1180 } 1181 1182 if (!VersionOrErr->empty()) { 1183 SymbolName += (IsDefault ? "@@" : "@"); 1184 SymbolName += *VersionOrErr; 1185 } 1186 return SymbolName; 1187 } 1188 1189 template <typename ELFT> 1190 Expected<unsigned> 1191 ELFDumper<ELFT>::getSymbolSectionIndex(const Elf_Sym *Symbol, 1192 const Elf_Sym *FirstSym) const { 1193 return Symbol->st_shndx == SHN_XINDEX 1194 ? object::getExtendedSymbolTableIndex<ELFT>(Symbol, FirstSym, 1195 ShndxTable) 1196 : Symbol->st_shndx; 1197 } 1198 1199 // If the Symbol has a reserved st_shndx other than SHN_XINDEX, return a 1200 // descriptive interpretation of the st_shndx value. Otherwise, return the name 1201 // of the section with index SectionIndex. This function assumes that if the 1202 // Symbol has st_shndx == SHN_XINDEX the SectionIndex will be the value derived 1203 // from the SHT_SYMTAB_SHNDX section. 1204 template <typename ELFT> 1205 Expected<StringRef> 1206 ELFDumper<ELFT>::getSymbolSectionName(const Elf_Sym *Symbol, 1207 unsigned SectionIndex) const { 1208 if (Symbol->isUndefined()) 1209 return "Undefined"; 1210 if (Symbol->isProcessorSpecific()) 1211 return "Processor Specific"; 1212 if (Symbol->isOSSpecific()) 1213 return "Operating System Specific"; 1214 if (Symbol->isAbsolute()) 1215 return "Absolute"; 1216 if (Symbol->isCommon()) 1217 return "Common"; 1218 if (Symbol->isReserved() && Symbol->st_shndx != SHN_XINDEX) 1219 return "Reserved"; 1220 1221 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1222 Expected<const Elf_Shdr *> SecOrErr = 1223 Obj->getSection(SectionIndex); 1224 if (!SecOrErr) 1225 return SecOrErr.takeError(); 1226 return Obj->getSectionName(*SecOrErr); 1227 } 1228 1229 template <class ELFO> 1230 static const typename ELFO::Elf_Shdr * 1231 findNotEmptySectionByAddress(const ELFO *Obj, StringRef FileName, 1232 uint64_t Addr) { 1233 for (const auto &Shdr : unwrapOrError(FileName, Obj->sections())) 1234 if (Shdr.sh_addr == Addr && Shdr.sh_size > 0) 1235 return &Shdr; 1236 return nullptr; 1237 } 1238 1239 template <class ELFO> 1240 static const typename ELFO::Elf_Shdr * 1241 findSectionByName(const ELFO &Obj, StringRef FileName, StringRef Name) { 1242 for (const auto &Shdr : unwrapOrError(FileName, Obj.sections())) 1243 if (Name == unwrapOrError(FileName, Obj.getSectionName(&Shdr))) 1244 return &Shdr; 1245 return nullptr; 1246 } 1247 1248 static const EnumEntry<unsigned> ElfClass[] = { 1249 {"None", "none", ELF::ELFCLASSNONE}, 1250 {"32-bit", "ELF32", ELF::ELFCLASS32}, 1251 {"64-bit", "ELF64", ELF::ELFCLASS64}, 1252 }; 1253 1254 static const EnumEntry<unsigned> ElfDataEncoding[] = { 1255 {"None", "none", ELF::ELFDATANONE}, 1256 {"LittleEndian", "2's complement, little endian", ELF::ELFDATA2LSB}, 1257 {"BigEndian", "2's complement, big endian", ELF::ELFDATA2MSB}, 1258 }; 1259 1260 static const EnumEntry<unsigned> ElfObjectFileType[] = { 1261 {"None", "NONE (none)", ELF::ET_NONE}, 1262 {"Relocatable", "REL (Relocatable file)", ELF::ET_REL}, 1263 {"Executable", "EXEC (Executable file)", ELF::ET_EXEC}, 1264 {"SharedObject", "DYN (Shared object file)", ELF::ET_DYN}, 1265 {"Core", "CORE (Core file)", ELF::ET_CORE}, 1266 }; 1267 1268 static const EnumEntry<unsigned> ElfOSABI[] = { 1269 {"SystemV", "UNIX - System V", ELF::ELFOSABI_NONE}, 1270 {"HPUX", "UNIX - HP-UX", ELF::ELFOSABI_HPUX}, 1271 {"NetBSD", "UNIX - NetBSD", ELF::ELFOSABI_NETBSD}, 1272 {"GNU/Linux", "UNIX - GNU", ELF::ELFOSABI_LINUX}, 1273 {"GNU/Hurd", "GNU/Hurd", ELF::ELFOSABI_HURD}, 1274 {"Solaris", "UNIX - Solaris", ELF::ELFOSABI_SOLARIS}, 1275 {"AIX", "UNIX - AIX", ELF::ELFOSABI_AIX}, 1276 {"IRIX", "UNIX - IRIX", ELF::ELFOSABI_IRIX}, 1277 {"FreeBSD", "UNIX - FreeBSD", ELF::ELFOSABI_FREEBSD}, 1278 {"TRU64", "UNIX - TRU64", ELF::ELFOSABI_TRU64}, 1279 {"Modesto", "Novell - Modesto", ELF::ELFOSABI_MODESTO}, 1280 {"OpenBSD", "UNIX - OpenBSD", ELF::ELFOSABI_OPENBSD}, 1281 {"OpenVMS", "VMS - OpenVMS", ELF::ELFOSABI_OPENVMS}, 1282 {"NSK", "HP - Non-Stop Kernel", ELF::ELFOSABI_NSK}, 1283 {"AROS", "AROS", ELF::ELFOSABI_AROS}, 1284 {"FenixOS", "FenixOS", ELF::ELFOSABI_FENIXOS}, 1285 {"CloudABI", "CloudABI", ELF::ELFOSABI_CLOUDABI}, 1286 {"Standalone", "Standalone App", ELF::ELFOSABI_STANDALONE} 1287 }; 1288 1289 static const EnumEntry<unsigned> SymVersionFlags[] = { 1290 {"Base", "BASE", VER_FLG_BASE}, 1291 {"Weak", "WEAK", VER_FLG_WEAK}, 1292 {"Info", "INFO", VER_FLG_INFO}}; 1293 1294 static const EnumEntry<unsigned> AMDGPUElfOSABI[] = { 1295 {"AMDGPU_HSA", "AMDGPU - HSA", ELF::ELFOSABI_AMDGPU_HSA}, 1296 {"AMDGPU_PAL", "AMDGPU - PAL", ELF::ELFOSABI_AMDGPU_PAL}, 1297 {"AMDGPU_MESA3D", "AMDGPU - MESA3D", ELF::ELFOSABI_AMDGPU_MESA3D} 1298 }; 1299 1300 static const EnumEntry<unsigned> ARMElfOSABI[] = { 1301 {"ARM", "ARM", ELF::ELFOSABI_ARM} 1302 }; 1303 1304 static const EnumEntry<unsigned> C6000ElfOSABI[] = { 1305 {"C6000_ELFABI", "Bare-metal C6000", ELF::ELFOSABI_C6000_ELFABI}, 1306 {"C6000_LINUX", "Linux C6000", ELF::ELFOSABI_C6000_LINUX} 1307 }; 1308 1309 static const EnumEntry<unsigned> ElfMachineType[] = { 1310 ENUM_ENT(EM_NONE, "None"), 1311 ENUM_ENT(EM_M32, "WE32100"), 1312 ENUM_ENT(EM_SPARC, "Sparc"), 1313 ENUM_ENT(EM_386, "Intel 80386"), 1314 ENUM_ENT(EM_68K, "MC68000"), 1315 ENUM_ENT(EM_88K, "MC88000"), 1316 ENUM_ENT(EM_IAMCU, "EM_IAMCU"), 1317 ENUM_ENT(EM_860, "Intel 80860"), 1318 ENUM_ENT(EM_MIPS, "MIPS R3000"), 1319 ENUM_ENT(EM_S370, "IBM System/370"), 1320 ENUM_ENT(EM_MIPS_RS3_LE, "MIPS R3000 little-endian"), 1321 ENUM_ENT(EM_PARISC, "HPPA"), 1322 ENUM_ENT(EM_VPP500, "Fujitsu VPP500"), 1323 ENUM_ENT(EM_SPARC32PLUS, "Sparc v8+"), 1324 ENUM_ENT(EM_960, "Intel 80960"), 1325 ENUM_ENT(EM_PPC, "PowerPC"), 1326 ENUM_ENT(EM_PPC64, "PowerPC64"), 1327 ENUM_ENT(EM_S390, "IBM S/390"), 1328 ENUM_ENT(EM_SPU, "SPU"), 1329 ENUM_ENT(EM_V800, "NEC V800 series"), 1330 ENUM_ENT(EM_FR20, "Fujistsu FR20"), 1331 ENUM_ENT(EM_RH32, "TRW RH-32"), 1332 ENUM_ENT(EM_RCE, "Motorola RCE"), 1333 ENUM_ENT(EM_ARM, "ARM"), 1334 ENUM_ENT(EM_ALPHA, "EM_ALPHA"), 1335 ENUM_ENT(EM_SH, "Hitachi SH"), 1336 ENUM_ENT(EM_SPARCV9, "Sparc v9"), 1337 ENUM_ENT(EM_TRICORE, "Siemens Tricore"), 1338 ENUM_ENT(EM_ARC, "ARC"), 1339 ENUM_ENT(EM_H8_300, "Hitachi H8/300"), 1340 ENUM_ENT(EM_H8_300H, "Hitachi H8/300H"), 1341 ENUM_ENT(EM_H8S, "Hitachi H8S"), 1342 ENUM_ENT(EM_H8_500, "Hitachi H8/500"), 1343 ENUM_ENT(EM_IA_64, "Intel IA-64"), 1344 ENUM_ENT(EM_MIPS_X, "Stanford MIPS-X"), 1345 ENUM_ENT(EM_COLDFIRE, "Motorola Coldfire"), 1346 ENUM_ENT(EM_68HC12, "Motorola MC68HC12 Microcontroller"), 1347 ENUM_ENT(EM_MMA, "Fujitsu Multimedia Accelerator"), 1348 ENUM_ENT(EM_PCP, "Siemens PCP"), 1349 ENUM_ENT(EM_NCPU, "Sony nCPU embedded RISC processor"), 1350 ENUM_ENT(EM_NDR1, "Denso NDR1 microprocesspr"), 1351 ENUM_ENT(EM_STARCORE, "Motorola Star*Core processor"), 1352 ENUM_ENT(EM_ME16, "Toyota ME16 processor"), 1353 ENUM_ENT(EM_ST100, "STMicroelectronics ST100 processor"), 1354 ENUM_ENT(EM_TINYJ, "Advanced Logic Corp. TinyJ embedded processor"), 1355 ENUM_ENT(EM_X86_64, "Advanced Micro Devices X86-64"), 1356 ENUM_ENT(EM_PDSP, "Sony DSP processor"), 1357 ENUM_ENT(EM_PDP10, "Digital Equipment Corp. PDP-10"), 1358 ENUM_ENT(EM_PDP11, "Digital Equipment Corp. PDP-11"), 1359 ENUM_ENT(EM_FX66, "Siemens FX66 microcontroller"), 1360 ENUM_ENT(EM_ST9PLUS, "STMicroelectronics ST9+ 8/16 bit microcontroller"), 1361 ENUM_ENT(EM_ST7, "STMicroelectronics ST7 8-bit microcontroller"), 1362 ENUM_ENT(EM_68HC16, "Motorola MC68HC16 Microcontroller"), 1363 ENUM_ENT(EM_68HC11, "Motorola MC68HC11 Microcontroller"), 1364 ENUM_ENT(EM_68HC08, "Motorola MC68HC08 Microcontroller"), 1365 ENUM_ENT(EM_68HC05, "Motorola MC68HC05 Microcontroller"), 1366 ENUM_ENT(EM_SVX, "Silicon Graphics SVx"), 1367 ENUM_ENT(EM_ST19, "STMicroelectronics ST19 8-bit microcontroller"), 1368 ENUM_ENT(EM_VAX, "Digital VAX"), 1369 ENUM_ENT(EM_CRIS, "Axis Communications 32-bit embedded processor"), 1370 ENUM_ENT(EM_JAVELIN, "Infineon Technologies 32-bit embedded cpu"), 1371 ENUM_ENT(EM_FIREPATH, "Element 14 64-bit DSP processor"), 1372 ENUM_ENT(EM_ZSP, "LSI Logic's 16-bit DSP processor"), 1373 ENUM_ENT(EM_MMIX, "Donald Knuth's educational 64-bit processor"), 1374 ENUM_ENT(EM_HUANY, "Harvard Universitys's machine-independent object format"), 1375 ENUM_ENT(EM_PRISM, "Vitesse Prism"), 1376 ENUM_ENT(EM_AVR, "Atmel AVR 8-bit microcontroller"), 1377 ENUM_ENT(EM_FR30, "Fujitsu FR30"), 1378 ENUM_ENT(EM_D10V, "Mitsubishi D10V"), 1379 ENUM_ENT(EM_D30V, "Mitsubishi D30V"), 1380 ENUM_ENT(EM_V850, "NEC v850"), 1381 ENUM_ENT(EM_M32R, "Renesas M32R (formerly Mitsubishi M32r)"), 1382 ENUM_ENT(EM_MN10300, "Matsushita MN10300"), 1383 ENUM_ENT(EM_MN10200, "Matsushita MN10200"), 1384 ENUM_ENT(EM_PJ, "picoJava"), 1385 ENUM_ENT(EM_OPENRISC, "OpenRISC 32-bit embedded processor"), 1386 ENUM_ENT(EM_ARC_COMPACT, "EM_ARC_COMPACT"), 1387 ENUM_ENT(EM_XTENSA, "Tensilica Xtensa Processor"), 1388 ENUM_ENT(EM_VIDEOCORE, "Alphamosaic VideoCore processor"), 1389 ENUM_ENT(EM_TMM_GPP, "Thompson Multimedia General Purpose Processor"), 1390 ENUM_ENT(EM_NS32K, "National Semiconductor 32000 series"), 1391 ENUM_ENT(EM_TPC, "Tenor Network TPC processor"), 1392 ENUM_ENT(EM_SNP1K, "EM_SNP1K"), 1393 ENUM_ENT(EM_ST200, "STMicroelectronics ST200 microcontroller"), 1394 ENUM_ENT(EM_IP2K, "Ubicom IP2xxx 8-bit microcontrollers"), 1395 ENUM_ENT(EM_MAX, "MAX Processor"), 1396 ENUM_ENT(EM_CR, "National Semiconductor CompactRISC"), 1397 ENUM_ENT(EM_F2MC16, "Fujitsu F2MC16"), 1398 ENUM_ENT(EM_MSP430, "Texas Instruments msp430 microcontroller"), 1399 ENUM_ENT(EM_BLACKFIN, "Analog Devices Blackfin"), 1400 ENUM_ENT(EM_SE_C33, "S1C33 Family of Seiko Epson processors"), 1401 ENUM_ENT(EM_SEP, "Sharp embedded microprocessor"), 1402 ENUM_ENT(EM_ARCA, "Arca RISC microprocessor"), 1403 ENUM_ENT(EM_UNICORE, "Unicore"), 1404 ENUM_ENT(EM_EXCESS, "eXcess 16/32/64-bit configurable embedded CPU"), 1405 ENUM_ENT(EM_DXP, "Icera Semiconductor Inc. Deep Execution Processor"), 1406 ENUM_ENT(EM_ALTERA_NIOS2, "Altera Nios"), 1407 ENUM_ENT(EM_CRX, "National Semiconductor CRX microprocessor"), 1408 ENUM_ENT(EM_XGATE, "Motorola XGATE embedded processor"), 1409 ENUM_ENT(EM_C166, "Infineon Technologies xc16x"), 1410 ENUM_ENT(EM_M16C, "Renesas M16C"), 1411 ENUM_ENT(EM_DSPIC30F, "Microchip Technology dsPIC30F Digital Signal Controller"), 1412 ENUM_ENT(EM_CE, "Freescale Communication Engine RISC core"), 1413 ENUM_ENT(EM_M32C, "Renesas M32C"), 1414 ENUM_ENT(EM_TSK3000, "Altium TSK3000 core"), 1415 ENUM_ENT(EM_RS08, "Freescale RS08 embedded processor"), 1416 ENUM_ENT(EM_SHARC, "EM_SHARC"), 1417 ENUM_ENT(EM_ECOG2, "Cyan Technology eCOG2 microprocessor"), 1418 ENUM_ENT(EM_SCORE7, "SUNPLUS S+Core"), 1419 ENUM_ENT(EM_DSP24, "New Japan Radio (NJR) 24-bit DSP Processor"), 1420 ENUM_ENT(EM_VIDEOCORE3, "Broadcom VideoCore III processor"), 1421 ENUM_ENT(EM_LATTICEMICO32, "Lattice Mico32"), 1422 ENUM_ENT(EM_SE_C17, "Seiko Epson C17 family"), 1423 ENUM_ENT(EM_TI_C6000, "Texas Instruments TMS320C6000 DSP family"), 1424 ENUM_ENT(EM_TI_C2000, "Texas Instruments TMS320C2000 DSP family"), 1425 ENUM_ENT(EM_TI_C5500, "Texas Instruments TMS320C55x DSP family"), 1426 ENUM_ENT(EM_MMDSP_PLUS, "STMicroelectronics 64bit VLIW Data Signal Processor"), 1427 ENUM_ENT(EM_CYPRESS_M8C, "Cypress M8C microprocessor"), 1428 ENUM_ENT(EM_R32C, "Renesas R32C series microprocessors"), 1429 ENUM_ENT(EM_TRIMEDIA, "NXP Semiconductors TriMedia architecture family"), 1430 ENUM_ENT(EM_HEXAGON, "Qualcomm Hexagon"), 1431 ENUM_ENT(EM_8051, "Intel 8051 and variants"), 1432 ENUM_ENT(EM_STXP7X, "STMicroelectronics STxP7x family"), 1433 ENUM_ENT(EM_NDS32, "Andes Technology compact code size embedded RISC processor family"), 1434 ENUM_ENT(EM_ECOG1, "Cyan Technology eCOG1 microprocessor"), 1435 ENUM_ENT(EM_ECOG1X, "Cyan Technology eCOG1X family"), 1436 ENUM_ENT(EM_MAXQ30, "Dallas Semiconductor MAXQ30 Core microcontrollers"), 1437 ENUM_ENT(EM_XIMO16, "New Japan Radio (NJR) 16-bit DSP Processor"), 1438 ENUM_ENT(EM_MANIK, "M2000 Reconfigurable RISC Microprocessor"), 1439 ENUM_ENT(EM_CRAYNV2, "Cray Inc. NV2 vector architecture"), 1440 ENUM_ENT(EM_RX, "Renesas RX"), 1441 ENUM_ENT(EM_METAG, "Imagination Technologies Meta processor architecture"), 1442 ENUM_ENT(EM_MCST_ELBRUS, "MCST Elbrus general purpose hardware architecture"), 1443 ENUM_ENT(EM_ECOG16, "Cyan Technology eCOG16 family"), 1444 ENUM_ENT(EM_CR16, "Xilinx MicroBlaze"), 1445 ENUM_ENT(EM_ETPU, "Freescale Extended Time Processing Unit"), 1446 ENUM_ENT(EM_SLE9X, "Infineon Technologies SLE9X core"), 1447 ENUM_ENT(EM_L10M, "EM_L10M"), 1448 ENUM_ENT(EM_K10M, "EM_K10M"), 1449 ENUM_ENT(EM_AARCH64, "AArch64"), 1450 ENUM_ENT(EM_AVR32, "Atmel Corporation 32-bit microprocessor family"), 1451 ENUM_ENT(EM_STM8, "STMicroeletronics STM8 8-bit microcontroller"), 1452 ENUM_ENT(EM_TILE64, "Tilera TILE64 multicore architecture family"), 1453 ENUM_ENT(EM_TILEPRO, "Tilera TILEPro multicore architecture family"), 1454 ENUM_ENT(EM_CUDA, "NVIDIA CUDA architecture"), 1455 ENUM_ENT(EM_TILEGX, "Tilera TILE-Gx multicore architecture family"), 1456 ENUM_ENT(EM_CLOUDSHIELD, "EM_CLOUDSHIELD"), 1457 ENUM_ENT(EM_COREA_1ST, "EM_COREA_1ST"), 1458 ENUM_ENT(EM_COREA_2ND, "EM_COREA_2ND"), 1459 ENUM_ENT(EM_ARC_COMPACT2, "EM_ARC_COMPACT2"), 1460 ENUM_ENT(EM_OPEN8, "EM_OPEN8"), 1461 ENUM_ENT(EM_RL78, "Renesas RL78"), 1462 ENUM_ENT(EM_VIDEOCORE5, "Broadcom VideoCore V processor"), 1463 ENUM_ENT(EM_78KOR, "EM_78KOR"), 1464 ENUM_ENT(EM_56800EX, "EM_56800EX"), 1465 ENUM_ENT(EM_AMDGPU, "EM_AMDGPU"), 1466 ENUM_ENT(EM_RISCV, "RISC-V"), 1467 ENUM_ENT(EM_LANAI, "EM_LANAI"), 1468 ENUM_ENT(EM_BPF, "EM_BPF"), 1469 }; 1470 1471 static const EnumEntry<unsigned> ElfSymbolBindings[] = { 1472 {"Local", "LOCAL", ELF::STB_LOCAL}, 1473 {"Global", "GLOBAL", ELF::STB_GLOBAL}, 1474 {"Weak", "WEAK", ELF::STB_WEAK}, 1475 {"Unique", "UNIQUE", ELF::STB_GNU_UNIQUE}}; 1476 1477 static const EnumEntry<unsigned> ElfSymbolVisibilities[] = { 1478 {"DEFAULT", "DEFAULT", ELF::STV_DEFAULT}, 1479 {"INTERNAL", "INTERNAL", ELF::STV_INTERNAL}, 1480 {"HIDDEN", "HIDDEN", ELF::STV_HIDDEN}, 1481 {"PROTECTED", "PROTECTED", ELF::STV_PROTECTED}}; 1482 1483 static const EnumEntry<unsigned> AMDGPUSymbolTypes[] = { 1484 { "AMDGPU_HSA_KERNEL", ELF::STT_AMDGPU_HSA_KERNEL } 1485 }; 1486 1487 static const char *getGroupType(uint32_t Flag) { 1488 if (Flag & ELF::GRP_COMDAT) 1489 return "COMDAT"; 1490 else 1491 return "(unknown)"; 1492 } 1493 1494 static const EnumEntry<unsigned> ElfSectionFlags[] = { 1495 ENUM_ENT(SHF_WRITE, "W"), 1496 ENUM_ENT(SHF_ALLOC, "A"), 1497 ENUM_ENT(SHF_EXECINSTR, "X"), 1498 ENUM_ENT(SHF_MERGE, "M"), 1499 ENUM_ENT(SHF_STRINGS, "S"), 1500 ENUM_ENT(SHF_INFO_LINK, "I"), 1501 ENUM_ENT(SHF_LINK_ORDER, "L"), 1502 ENUM_ENT(SHF_OS_NONCONFORMING, "O"), 1503 ENUM_ENT(SHF_GROUP, "G"), 1504 ENUM_ENT(SHF_TLS, "T"), 1505 ENUM_ENT(SHF_COMPRESSED, "C"), 1506 ENUM_ENT(SHF_EXCLUDE, "E"), 1507 }; 1508 1509 static const EnumEntry<unsigned> ElfXCoreSectionFlags[] = { 1510 ENUM_ENT(XCORE_SHF_CP_SECTION, ""), 1511 ENUM_ENT(XCORE_SHF_DP_SECTION, "") 1512 }; 1513 1514 static const EnumEntry<unsigned> ElfARMSectionFlags[] = { 1515 ENUM_ENT(SHF_ARM_PURECODE, "y") 1516 }; 1517 1518 static const EnumEntry<unsigned> ElfHexagonSectionFlags[] = { 1519 ENUM_ENT(SHF_HEX_GPREL, "") 1520 }; 1521 1522 static const EnumEntry<unsigned> ElfMipsSectionFlags[] = { 1523 ENUM_ENT(SHF_MIPS_NODUPES, ""), 1524 ENUM_ENT(SHF_MIPS_NAMES, ""), 1525 ENUM_ENT(SHF_MIPS_LOCAL, ""), 1526 ENUM_ENT(SHF_MIPS_NOSTRIP, ""), 1527 ENUM_ENT(SHF_MIPS_GPREL, ""), 1528 ENUM_ENT(SHF_MIPS_MERGE, ""), 1529 ENUM_ENT(SHF_MIPS_ADDR, ""), 1530 ENUM_ENT(SHF_MIPS_STRING, "") 1531 }; 1532 1533 static const EnumEntry<unsigned> ElfX86_64SectionFlags[] = { 1534 ENUM_ENT(SHF_X86_64_LARGE, "l") 1535 }; 1536 1537 static std::vector<EnumEntry<unsigned>> 1538 getSectionFlagsForTarget(unsigned EMachine) { 1539 std::vector<EnumEntry<unsigned>> Ret(std::begin(ElfSectionFlags), 1540 std::end(ElfSectionFlags)); 1541 switch (EMachine) { 1542 case EM_ARM: 1543 Ret.insert(Ret.end(), std::begin(ElfARMSectionFlags), 1544 std::end(ElfARMSectionFlags)); 1545 break; 1546 case EM_HEXAGON: 1547 Ret.insert(Ret.end(), std::begin(ElfHexagonSectionFlags), 1548 std::end(ElfHexagonSectionFlags)); 1549 break; 1550 case EM_MIPS: 1551 Ret.insert(Ret.end(), std::begin(ElfMipsSectionFlags), 1552 std::end(ElfMipsSectionFlags)); 1553 break; 1554 case EM_X86_64: 1555 Ret.insert(Ret.end(), std::begin(ElfX86_64SectionFlags), 1556 std::end(ElfX86_64SectionFlags)); 1557 break; 1558 case EM_XCORE: 1559 Ret.insert(Ret.end(), std::begin(ElfXCoreSectionFlags), 1560 std::end(ElfXCoreSectionFlags)); 1561 break; 1562 default: 1563 break; 1564 } 1565 return Ret; 1566 } 1567 1568 static std::string getGNUFlags(unsigned EMachine, uint64_t Flags) { 1569 // Here we are trying to build the flags string in the same way as GNU does. 1570 // It is not that straightforward. Imagine we have sh_flags == 0x90000000. 1571 // SHF_EXCLUDE ("E") has a value of 0x80000000 and SHF_MASKPROC is 0xf0000000. 1572 // GNU readelf will not print "E" or "Ep" in this case, but will print just 1573 // "p". It only will print "E" when no other processor flag is set. 1574 std::string Str; 1575 bool HasUnknownFlag = false; 1576 bool HasOSFlag = false; 1577 bool HasProcFlag = false; 1578 std::vector<EnumEntry<unsigned>> FlagsList = 1579 getSectionFlagsForTarget(EMachine); 1580 while (Flags) { 1581 // Take the least significant bit as a flag. 1582 uint64_t Flag = Flags & -Flags; 1583 Flags -= Flag; 1584 1585 // Find the flag in the known flags list. 1586 auto I = llvm::find_if(FlagsList, [=](const EnumEntry<unsigned> &E) { 1587 // Flags with empty names are not printed in GNU style output. 1588 return E.Value == Flag && !E.AltName.empty(); 1589 }); 1590 if (I != FlagsList.end()) { 1591 Str += I->AltName; 1592 continue; 1593 } 1594 1595 // If we did not find a matching regular flag, then we deal with an OS 1596 // specific flag, processor specific flag or an unknown flag. 1597 if (Flag & ELF::SHF_MASKOS) { 1598 HasOSFlag = true; 1599 Flags &= ~ELF::SHF_MASKOS; 1600 } else if (Flag & ELF::SHF_MASKPROC) { 1601 HasProcFlag = true; 1602 // Mask off all the processor-specific bits. This removes the SHF_EXCLUDE 1603 // bit if set so that it doesn't also get printed. 1604 Flags &= ~ELF::SHF_MASKPROC; 1605 } else { 1606 HasUnknownFlag = true; 1607 } 1608 } 1609 1610 // "o", "p" and "x" are printed last. 1611 if (HasOSFlag) 1612 Str += "o"; 1613 if (HasProcFlag) 1614 Str += "p"; 1615 if (HasUnknownFlag) 1616 Str += "x"; 1617 return Str; 1618 } 1619 1620 static const char *getElfSegmentType(unsigned Arch, unsigned Type) { 1621 // Check potentially overlapped processor-specific 1622 // program header type. 1623 switch (Arch) { 1624 case ELF::EM_ARM: 1625 switch (Type) { LLVM_READOBJ_ENUM_CASE(ELF, PT_ARM_EXIDX); } 1626 break; 1627 case ELF::EM_MIPS: 1628 case ELF::EM_MIPS_RS3_LE: 1629 switch (Type) { 1630 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_REGINFO); 1631 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_RTPROC); 1632 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_OPTIONS); 1633 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_ABIFLAGS); 1634 } 1635 break; 1636 } 1637 1638 switch (Type) { 1639 LLVM_READOBJ_ENUM_CASE(ELF, PT_NULL ); 1640 LLVM_READOBJ_ENUM_CASE(ELF, PT_LOAD ); 1641 LLVM_READOBJ_ENUM_CASE(ELF, PT_DYNAMIC); 1642 LLVM_READOBJ_ENUM_CASE(ELF, PT_INTERP ); 1643 LLVM_READOBJ_ENUM_CASE(ELF, PT_NOTE ); 1644 LLVM_READOBJ_ENUM_CASE(ELF, PT_SHLIB ); 1645 LLVM_READOBJ_ENUM_CASE(ELF, PT_PHDR ); 1646 LLVM_READOBJ_ENUM_CASE(ELF, PT_TLS ); 1647 1648 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_EH_FRAME); 1649 LLVM_READOBJ_ENUM_CASE(ELF, PT_SUNW_UNWIND); 1650 1651 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_STACK); 1652 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_RELRO); 1653 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_PROPERTY); 1654 1655 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_RANDOMIZE); 1656 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_WXNEEDED); 1657 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_BOOTDATA); 1658 1659 default: 1660 return ""; 1661 } 1662 } 1663 1664 static std::string getElfPtType(unsigned Arch, unsigned Type) { 1665 switch (Type) { 1666 LLVM_READOBJ_PHDR_ENUM(ELF, PT_NULL) 1667 LLVM_READOBJ_PHDR_ENUM(ELF, PT_LOAD) 1668 LLVM_READOBJ_PHDR_ENUM(ELF, PT_DYNAMIC) 1669 LLVM_READOBJ_PHDR_ENUM(ELF, PT_INTERP) 1670 LLVM_READOBJ_PHDR_ENUM(ELF, PT_NOTE) 1671 LLVM_READOBJ_PHDR_ENUM(ELF, PT_SHLIB) 1672 LLVM_READOBJ_PHDR_ENUM(ELF, PT_PHDR) 1673 LLVM_READOBJ_PHDR_ENUM(ELF, PT_TLS) 1674 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_EH_FRAME) 1675 LLVM_READOBJ_PHDR_ENUM(ELF, PT_SUNW_UNWIND) 1676 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_STACK) 1677 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_RELRO) 1678 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_PROPERTY) 1679 default: 1680 // All machine specific PT_* types 1681 switch (Arch) { 1682 case ELF::EM_ARM: 1683 if (Type == ELF::PT_ARM_EXIDX) 1684 return "EXIDX"; 1685 break; 1686 case ELF::EM_MIPS: 1687 case ELF::EM_MIPS_RS3_LE: 1688 switch (Type) { 1689 case PT_MIPS_REGINFO: 1690 return "REGINFO"; 1691 case PT_MIPS_RTPROC: 1692 return "RTPROC"; 1693 case PT_MIPS_OPTIONS: 1694 return "OPTIONS"; 1695 case PT_MIPS_ABIFLAGS: 1696 return "ABIFLAGS"; 1697 } 1698 break; 1699 } 1700 } 1701 return std::string("<unknown>: ") + to_string(format_hex(Type, 1)); 1702 } 1703 1704 static const EnumEntry<unsigned> ElfSegmentFlags[] = { 1705 LLVM_READOBJ_ENUM_ENT(ELF, PF_X), 1706 LLVM_READOBJ_ENUM_ENT(ELF, PF_W), 1707 LLVM_READOBJ_ENUM_ENT(ELF, PF_R) 1708 }; 1709 1710 static const EnumEntry<unsigned> ElfHeaderMipsFlags[] = { 1711 ENUM_ENT(EF_MIPS_NOREORDER, "noreorder"), 1712 ENUM_ENT(EF_MIPS_PIC, "pic"), 1713 ENUM_ENT(EF_MIPS_CPIC, "cpic"), 1714 ENUM_ENT(EF_MIPS_ABI2, "abi2"), 1715 ENUM_ENT(EF_MIPS_32BITMODE, "32bitmode"), 1716 ENUM_ENT(EF_MIPS_FP64, "fp64"), 1717 ENUM_ENT(EF_MIPS_NAN2008, "nan2008"), 1718 ENUM_ENT(EF_MIPS_ABI_O32, "o32"), 1719 ENUM_ENT(EF_MIPS_ABI_O64, "o64"), 1720 ENUM_ENT(EF_MIPS_ABI_EABI32, "eabi32"), 1721 ENUM_ENT(EF_MIPS_ABI_EABI64, "eabi64"), 1722 ENUM_ENT(EF_MIPS_MACH_3900, "3900"), 1723 ENUM_ENT(EF_MIPS_MACH_4010, "4010"), 1724 ENUM_ENT(EF_MIPS_MACH_4100, "4100"), 1725 ENUM_ENT(EF_MIPS_MACH_4650, "4650"), 1726 ENUM_ENT(EF_MIPS_MACH_4120, "4120"), 1727 ENUM_ENT(EF_MIPS_MACH_4111, "4111"), 1728 ENUM_ENT(EF_MIPS_MACH_SB1, "sb1"), 1729 ENUM_ENT(EF_MIPS_MACH_OCTEON, "octeon"), 1730 ENUM_ENT(EF_MIPS_MACH_XLR, "xlr"), 1731 ENUM_ENT(EF_MIPS_MACH_OCTEON2, "octeon2"), 1732 ENUM_ENT(EF_MIPS_MACH_OCTEON3, "octeon3"), 1733 ENUM_ENT(EF_MIPS_MACH_5400, "5400"), 1734 ENUM_ENT(EF_MIPS_MACH_5900, "5900"), 1735 ENUM_ENT(EF_MIPS_MACH_5500, "5500"), 1736 ENUM_ENT(EF_MIPS_MACH_9000, "9000"), 1737 ENUM_ENT(EF_MIPS_MACH_LS2E, "loongson-2e"), 1738 ENUM_ENT(EF_MIPS_MACH_LS2F, "loongson-2f"), 1739 ENUM_ENT(EF_MIPS_MACH_LS3A, "loongson-3a"), 1740 ENUM_ENT(EF_MIPS_MICROMIPS, "micromips"), 1741 ENUM_ENT(EF_MIPS_ARCH_ASE_M16, "mips16"), 1742 ENUM_ENT(EF_MIPS_ARCH_ASE_MDMX, "mdmx"), 1743 ENUM_ENT(EF_MIPS_ARCH_1, "mips1"), 1744 ENUM_ENT(EF_MIPS_ARCH_2, "mips2"), 1745 ENUM_ENT(EF_MIPS_ARCH_3, "mips3"), 1746 ENUM_ENT(EF_MIPS_ARCH_4, "mips4"), 1747 ENUM_ENT(EF_MIPS_ARCH_5, "mips5"), 1748 ENUM_ENT(EF_MIPS_ARCH_32, "mips32"), 1749 ENUM_ENT(EF_MIPS_ARCH_64, "mips64"), 1750 ENUM_ENT(EF_MIPS_ARCH_32R2, "mips32r2"), 1751 ENUM_ENT(EF_MIPS_ARCH_64R2, "mips64r2"), 1752 ENUM_ENT(EF_MIPS_ARCH_32R6, "mips32r6"), 1753 ENUM_ENT(EF_MIPS_ARCH_64R6, "mips64r6") 1754 }; 1755 1756 static const EnumEntry<unsigned> ElfHeaderAMDGPUFlags[] = { 1757 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_NONE), 1758 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R600), 1759 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R630), 1760 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RS880), 1761 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV670), 1762 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV710), 1763 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV730), 1764 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV770), 1765 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CEDAR), 1766 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CYPRESS), 1767 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_JUNIPER), 1768 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_REDWOOD), 1769 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_SUMO), 1770 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_BARTS), 1771 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAICOS), 1772 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAYMAN), 1773 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_TURKS), 1774 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX600), 1775 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX601), 1776 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX700), 1777 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX701), 1778 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX702), 1779 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX703), 1780 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX704), 1781 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX801), 1782 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX802), 1783 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX803), 1784 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX810), 1785 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX900), 1786 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX902), 1787 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX904), 1788 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX906), 1789 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX908), 1790 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX909), 1791 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1010), 1792 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1011), 1793 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1012), 1794 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_XNACK), 1795 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_SRAM_ECC) 1796 }; 1797 1798 static const EnumEntry<unsigned> ElfHeaderRISCVFlags[] = { 1799 ENUM_ENT(EF_RISCV_RVC, "RVC"), 1800 ENUM_ENT(EF_RISCV_FLOAT_ABI_SINGLE, "single-float ABI"), 1801 ENUM_ENT(EF_RISCV_FLOAT_ABI_DOUBLE, "double-float ABI"), 1802 ENUM_ENT(EF_RISCV_FLOAT_ABI_QUAD, "quad-float ABI"), 1803 ENUM_ENT(EF_RISCV_RVE, "RVE") 1804 }; 1805 1806 static const EnumEntry<unsigned> ElfSymOtherFlags[] = { 1807 LLVM_READOBJ_ENUM_ENT(ELF, STV_INTERNAL), 1808 LLVM_READOBJ_ENUM_ENT(ELF, STV_HIDDEN), 1809 LLVM_READOBJ_ENUM_ENT(ELF, STV_PROTECTED) 1810 }; 1811 1812 static const EnumEntry<unsigned> ElfMipsSymOtherFlags[] = { 1813 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1814 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1815 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PIC), 1816 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MICROMIPS) 1817 }; 1818 1819 static const EnumEntry<unsigned> ElfMips16SymOtherFlags[] = { 1820 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1821 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1822 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MIPS16) 1823 }; 1824 1825 static const char *getElfMipsOptionsOdkType(unsigned Odk) { 1826 switch (Odk) { 1827 LLVM_READOBJ_ENUM_CASE(ELF, ODK_NULL); 1828 LLVM_READOBJ_ENUM_CASE(ELF, ODK_REGINFO); 1829 LLVM_READOBJ_ENUM_CASE(ELF, ODK_EXCEPTIONS); 1830 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAD); 1831 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWPATCH); 1832 LLVM_READOBJ_ENUM_CASE(ELF, ODK_FILL); 1833 LLVM_READOBJ_ENUM_CASE(ELF, ODK_TAGS); 1834 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWAND); 1835 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWOR); 1836 LLVM_READOBJ_ENUM_CASE(ELF, ODK_GP_GROUP); 1837 LLVM_READOBJ_ENUM_CASE(ELF, ODK_IDENT); 1838 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAGESIZE); 1839 default: 1840 return "Unknown"; 1841 } 1842 } 1843 1844 template <typename ELFT> 1845 std::pair<const typename ELFT::Phdr *, const typename ELFT::Shdr *> 1846 ELFDumper<ELFT>::findDynamic(const ELFFile<ELFT> *Obj) { 1847 // Try to locate the PT_DYNAMIC header. 1848 const Elf_Phdr *DynamicPhdr = nullptr; 1849 for (const Elf_Phdr &Phdr : 1850 unwrapOrError(ObjF->getFileName(), Obj->program_headers())) { 1851 if (Phdr.p_type != ELF::PT_DYNAMIC) 1852 continue; 1853 DynamicPhdr = &Phdr; 1854 break; 1855 } 1856 1857 // Try to locate the .dynamic section in the sections header table. 1858 const Elf_Shdr *DynamicSec = nullptr; 1859 for (const Elf_Shdr &Sec : 1860 unwrapOrError(ObjF->getFileName(), Obj->sections())) { 1861 if (Sec.sh_type != ELF::SHT_DYNAMIC) 1862 continue; 1863 DynamicSec = &Sec; 1864 break; 1865 } 1866 1867 if (DynamicPhdr && DynamicPhdr->p_offset + DynamicPhdr->p_filesz > 1868 ObjF->getMemoryBufferRef().getBufferSize()) { 1869 reportWarning( 1870 createError( 1871 "PT_DYNAMIC segment offset + size exceeds the size of the file"), 1872 ObjF->getFileName()); 1873 // Don't use the broken dynamic header. 1874 DynamicPhdr = nullptr; 1875 } 1876 1877 if (DynamicPhdr && DynamicSec) { 1878 StringRef Name = 1879 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DynamicSec)); 1880 if (DynamicSec->sh_addr + DynamicSec->sh_size > 1881 DynamicPhdr->p_vaddr + DynamicPhdr->p_memsz || 1882 DynamicSec->sh_addr < DynamicPhdr->p_vaddr) 1883 reportWarning(createError("The SHT_DYNAMIC section '" + Name + 1884 "' is not contained within the " 1885 "PT_DYNAMIC segment"), 1886 ObjF->getFileName()); 1887 1888 if (DynamicSec->sh_addr != DynamicPhdr->p_vaddr) 1889 reportWarning(createError("The SHT_DYNAMIC section '" + Name + 1890 "' is not at the start of " 1891 "PT_DYNAMIC segment"), 1892 ObjF->getFileName()); 1893 } 1894 1895 return std::make_pair(DynamicPhdr, DynamicSec); 1896 } 1897 1898 template <typename ELFT> 1899 void ELFDumper<ELFT>::loadDynamicTable(const ELFFile<ELFT> *Obj) { 1900 const Elf_Phdr *DynamicPhdr; 1901 const Elf_Shdr *DynamicSec; 1902 std::tie(DynamicPhdr, DynamicSec) = findDynamic(Obj); 1903 if (!DynamicPhdr && !DynamicSec) 1904 return; 1905 1906 DynRegionInfo FromPhdr(ObjF->getFileName()); 1907 bool IsPhdrTableValid = false; 1908 if (DynamicPhdr) { 1909 FromPhdr = createDRIFrom(DynamicPhdr, sizeof(Elf_Dyn)); 1910 FromPhdr.SizePrintName = "PT_DYNAMIC size"; 1911 FromPhdr.EntSizePrintName = ""; 1912 1913 IsPhdrTableValid = !FromPhdr.getAsArrayRef<Elf_Dyn>().empty(); 1914 } 1915 1916 // Locate the dynamic table described in a section header. 1917 // Ignore sh_entsize and use the expected value for entry size explicitly. 1918 // This allows us to dump dynamic sections with a broken sh_entsize 1919 // field. 1920 DynRegionInfo FromSec(ObjF->getFileName()); 1921 bool IsSecTableValid = false; 1922 if (DynamicSec) { 1923 FromSec = 1924 checkDRI({ObjF->getELFFile()->base() + DynamicSec->sh_offset, 1925 DynamicSec->sh_size, sizeof(Elf_Dyn), ObjF->getFileName()}); 1926 FromSec.Context = ("section with index " + 1927 Twine(DynamicSec - &cantFail(Obj->sections()).front())) 1928 .str(); 1929 FromSec.EntSizePrintName = ""; 1930 1931 IsSecTableValid = !FromSec.getAsArrayRef<Elf_Dyn>().empty(); 1932 } 1933 1934 // When we only have information from one of the SHT_DYNAMIC section header or 1935 // PT_DYNAMIC program header, just use that. 1936 if (!DynamicPhdr || !DynamicSec) { 1937 if ((DynamicPhdr && IsPhdrTableValid) || (DynamicSec && IsSecTableValid)) { 1938 DynamicTable = DynamicPhdr ? FromPhdr : FromSec; 1939 parseDynamicTable(Obj); 1940 } else { 1941 reportWarning(createError("no valid dynamic table was found"), 1942 ObjF->getFileName()); 1943 } 1944 return; 1945 } 1946 1947 // At this point we have tables found from the section header and from the 1948 // dynamic segment. Usually they match, but we have to do sanity checks to 1949 // verify that. 1950 1951 if (FromPhdr.Addr != FromSec.Addr) 1952 reportWarning(createError("SHT_DYNAMIC section header and PT_DYNAMIC " 1953 "program header disagree about " 1954 "the location of the dynamic table"), 1955 ObjF->getFileName()); 1956 1957 if (!IsPhdrTableValid && !IsSecTableValid) { 1958 reportWarning(createError("no valid dynamic table was found"), 1959 ObjF->getFileName()); 1960 return; 1961 } 1962 1963 // Information in the PT_DYNAMIC program header has priority over the information 1964 // in a section header. 1965 if (IsPhdrTableValid) { 1966 if (!IsSecTableValid) 1967 reportWarning( 1968 createError( 1969 "SHT_DYNAMIC dynamic table is invalid: PT_DYNAMIC will be used"), 1970 ObjF->getFileName()); 1971 DynamicTable = FromPhdr; 1972 } else { 1973 reportWarning( 1974 createError( 1975 "PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used"), 1976 ObjF->getFileName()); 1977 DynamicTable = FromSec; 1978 } 1979 1980 parseDynamicTable(Obj); 1981 } 1982 1983 template <typename ELFT> 1984 ELFDumper<ELFT>::ELFDumper(const object::ELFObjectFile<ELFT> *ObjF, 1985 ScopedPrinter &Writer) 1986 : ObjDumper(Writer), ObjF(ObjF), DynRelRegion(ObjF->getFileName()), 1987 DynRelaRegion(ObjF->getFileName()), DynRelrRegion(ObjF->getFileName()), 1988 DynPLTRelRegion(ObjF->getFileName()), DynamicTable(ObjF->getFileName()) { 1989 // Dumper reports all non-critical errors as warnings. 1990 // It does not print the same warning more than once. 1991 WarningHandler = [this](const Twine &Msg) { 1992 if (Warnings.insert(Msg.str()).second) 1993 reportWarning(createError(Msg), this->ObjF->getFileName()); 1994 return Error::success(); 1995 }; 1996 1997 if (opts::Output == opts::GNU) 1998 ELFDumperStyle.reset(new GNUStyle<ELFT>(Writer, this)); 1999 else 2000 ELFDumperStyle.reset(new LLVMStyle<ELFT>(Writer, this)); 2001 2002 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2003 typename ELFT::ShdrRange Sections = 2004 unwrapOrError(ObjF->getFileName(), Obj->sections()); 2005 for (const Elf_Shdr &Sec : Sections) { 2006 switch (Sec.sh_type) { 2007 case ELF::SHT_SYMTAB: 2008 if (!DotSymtabSec) 2009 DotSymtabSec = &Sec; 2010 break; 2011 case ELF::SHT_DYNSYM: 2012 if (!DynSymRegion) { 2013 DynSymRegion = createDRIFrom(&Sec); 2014 DynSymRegion->Context = 2015 ("section with index " + Twine(&Sec - &Sections.front())).str(); 2016 // This is only used (if Elf_Shdr present)for naming section in GNU 2017 // style 2018 DynSymtabName = 2019 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec)); 2020 2021 if (Expected<StringRef> E = Obj->getStringTableForSymtab(Sec)) 2022 DynamicStringTable = *E; 2023 else 2024 reportWarning(E.takeError(), ObjF->getFileName()); 2025 } 2026 break; 2027 case ELF::SHT_SYMTAB_SHNDX: 2028 ShndxTable = unwrapOrError(ObjF->getFileName(), Obj->getSHNDXTable(Sec)); 2029 break; 2030 case ELF::SHT_GNU_versym: 2031 if (!SymbolVersionSection) 2032 SymbolVersionSection = &Sec; 2033 break; 2034 case ELF::SHT_GNU_verdef: 2035 if (!SymbolVersionDefSection) 2036 SymbolVersionDefSection = &Sec; 2037 break; 2038 case ELF::SHT_GNU_verneed: 2039 if (!SymbolVersionNeedSection) 2040 SymbolVersionNeedSection = &Sec; 2041 break; 2042 case ELF::SHT_LLVM_CALL_GRAPH_PROFILE: 2043 if (!DotCGProfileSec) 2044 DotCGProfileSec = &Sec; 2045 break; 2046 case ELF::SHT_LLVM_ADDRSIG: 2047 if (!DotAddrsigSec) 2048 DotAddrsigSec = &Sec; 2049 break; 2050 } 2051 } 2052 2053 loadDynamicTable(Obj); 2054 } 2055 2056 template <typename ELFT> 2057 void ELFDumper<ELFT>::parseDynamicTable(const ELFFile<ELFT> *Obj) { 2058 auto toMappedAddr = [&](uint64_t Tag, uint64_t VAddr) -> const uint8_t * { 2059 auto MappedAddrOrError = ObjF->getELFFile()->toMappedAddr(VAddr); 2060 if (!MappedAddrOrError) { 2061 Error Err = 2062 createError("Unable to parse DT_" + Obj->getDynamicTagAsString(Tag) + 2063 ": " + llvm::toString(MappedAddrOrError.takeError())); 2064 2065 reportWarning(std::move(Err), ObjF->getFileName()); 2066 return nullptr; 2067 } 2068 return MappedAddrOrError.get(); 2069 }; 2070 2071 uint64_t SONameOffset = 0; 2072 const char *StringTableBegin = nullptr; 2073 uint64_t StringTableSize = 0; 2074 Optional<DynRegionInfo> DynSymFromTable; 2075 for (const Elf_Dyn &Dyn : dynamic_table()) { 2076 switch (Dyn.d_tag) { 2077 case ELF::DT_HASH: 2078 HashTable = reinterpret_cast<const Elf_Hash *>( 2079 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2080 break; 2081 case ELF::DT_GNU_HASH: 2082 GnuHashTable = reinterpret_cast<const Elf_GnuHash *>( 2083 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2084 break; 2085 case ELF::DT_STRTAB: 2086 StringTableBegin = reinterpret_cast<const char *>( 2087 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2088 break; 2089 case ELF::DT_STRSZ: 2090 StringTableSize = Dyn.getVal(); 2091 break; 2092 case ELF::DT_SYMTAB: { 2093 // If we can't map the DT_SYMTAB value to an address (e.g. when there are 2094 // no program headers), we ignore its value. 2095 if (const uint8_t *VA = toMappedAddr(Dyn.getTag(), Dyn.getPtr())) { 2096 DynSymFromTable.emplace(ObjF->getFileName()); 2097 DynSymFromTable->Addr = VA; 2098 DynSymFromTable->EntSize = sizeof(Elf_Sym); 2099 DynSymFromTable->EntSizePrintName = ""; 2100 } 2101 break; 2102 } 2103 case ELF::DT_SYMENT: { 2104 uint64_t Val = Dyn.getVal(); 2105 if (Val != sizeof(Elf_Sym)) 2106 reportWarning(createError("DT_SYMENT value of 0x" + 2107 Twine::utohexstr(Val) + 2108 " is not the size of a symbol (0x" + 2109 Twine::utohexstr(sizeof(Elf_Sym)) + ")"), 2110 ObjF->getFileName()); 2111 break; 2112 } 2113 case ELF::DT_RELA: 2114 DynRelaRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2115 break; 2116 case ELF::DT_RELASZ: 2117 DynRelaRegion.Size = Dyn.getVal(); 2118 DynRelaRegion.SizePrintName = "DT_RELASZ value"; 2119 break; 2120 case ELF::DT_RELAENT: 2121 DynRelaRegion.EntSize = Dyn.getVal(); 2122 DynRelaRegion.EntSizePrintName = "DT_RELAENT value"; 2123 break; 2124 case ELF::DT_SONAME: 2125 SONameOffset = Dyn.getVal(); 2126 break; 2127 case ELF::DT_REL: 2128 DynRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2129 break; 2130 case ELF::DT_RELSZ: 2131 DynRelRegion.Size = Dyn.getVal(); 2132 DynRelRegion.SizePrintName = "DT_RELSZ value"; 2133 break; 2134 case ELF::DT_RELENT: 2135 DynRelRegion.EntSize = Dyn.getVal(); 2136 DynRelRegion.EntSizePrintName = "DT_RELENT value"; 2137 break; 2138 case ELF::DT_RELR: 2139 case ELF::DT_ANDROID_RELR: 2140 DynRelrRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2141 break; 2142 case ELF::DT_RELRSZ: 2143 case ELF::DT_ANDROID_RELRSZ: 2144 DynRelrRegion.Size = Dyn.getVal(); 2145 DynRelrRegion.SizePrintName = Dyn.d_tag == ELF::DT_RELRSZ 2146 ? "DT_RELRSZ value" 2147 : "DT_ANDROID_RELRSZ value"; 2148 break; 2149 case ELF::DT_RELRENT: 2150 case ELF::DT_ANDROID_RELRENT: 2151 DynRelrRegion.EntSize = Dyn.getVal(); 2152 DynRelrRegion.EntSizePrintName = Dyn.d_tag == ELF::DT_RELRENT 2153 ? "DT_RELRENT value" 2154 : "DT_ANDROID_RELRENT value"; 2155 break; 2156 case ELF::DT_PLTREL: 2157 if (Dyn.getVal() == DT_REL) 2158 DynPLTRelRegion.EntSize = sizeof(Elf_Rel); 2159 else if (Dyn.getVal() == DT_RELA) 2160 DynPLTRelRegion.EntSize = sizeof(Elf_Rela); 2161 else 2162 reportError(createError(Twine("unknown DT_PLTREL value of ") + 2163 Twine((uint64_t)Dyn.getVal())), 2164 ObjF->getFileName()); 2165 DynPLTRelRegion.EntSizePrintName = ""; 2166 break; 2167 case ELF::DT_JMPREL: 2168 DynPLTRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2169 break; 2170 case ELF::DT_PLTRELSZ: 2171 DynPLTRelRegion.Size = Dyn.getVal(); 2172 DynPLTRelRegion.SizePrintName = "DT_PLTRELSZ value"; 2173 break; 2174 } 2175 } 2176 if (StringTableBegin) 2177 DynamicStringTable = StringRef(StringTableBegin, StringTableSize); 2178 SOName = getDynamicString(SONameOffset); 2179 2180 if (DynSymRegion) { 2181 // Often we find the information about the dynamic symbol table 2182 // location in the SHT_DYNSYM section header. However, the value in 2183 // DT_SYMTAB has priority, because it is used by dynamic loaders to 2184 // locate .dynsym at runtime. The location we find in the section header 2185 // and the location we find here should match. 2186 if (DynSymFromTable && DynSymFromTable->Addr != DynSymRegion->Addr) 2187 reportUniqueWarning( 2188 createError("SHT_DYNSYM section header and DT_SYMTAB disagree about " 2189 "the location of the dynamic symbol table")); 2190 2191 // According to the ELF gABI: "The number of symbol table entries should 2192 // equal nchain". Check to see if the DT_HASH hash table nchain value 2193 // conflicts with the number of symbols in the dynamic symbol table 2194 // according to the section header. 2195 if (HashTable && 2196 HashTable->nchain != DynSymRegion->Size / DynSymRegion->EntSize) 2197 reportUniqueWarning(createError( 2198 "hash table nchain (" + Twine(HashTable->nchain) + 2199 ") differs from symbol count derived from SHT_DYNSYM section " 2200 "header (" + 2201 Twine(DynSymRegion->Size / DynSymRegion->EntSize) + ")")); 2202 } 2203 2204 // Delay the creation of the actual dynamic symbol table until now, so that 2205 // checks can always be made against the section header-based properties, 2206 // without worrying about tag order. 2207 if (DynSymFromTable) { 2208 if (!DynSymRegion) { 2209 DynSymRegion = DynSymFromTable; 2210 } else { 2211 DynSymRegion->Addr = DynSymFromTable->Addr; 2212 DynSymRegion->EntSize = DynSymFromTable->EntSize; 2213 DynSymRegion->EntSizePrintName = DynSymFromTable->EntSizePrintName; 2214 } 2215 } 2216 2217 // Derive the dynamic symbol table size from the DT_HASH hash table, if 2218 // present. 2219 if (HashTable && DynSymRegion) 2220 DynSymRegion->Size = HashTable->nchain * DynSymRegion->EntSize; 2221 } 2222 2223 template <typename ELFT> 2224 typename ELFDumper<ELFT>::Elf_Rel_Range ELFDumper<ELFT>::dyn_rels() const { 2225 return DynRelRegion.getAsArrayRef<Elf_Rel>(); 2226 } 2227 2228 template <typename ELFT> 2229 typename ELFDumper<ELFT>::Elf_Rela_Range ELFDumper<ELFT>::dyn_relas() const { 2230 return DynRelaRegion.getAsArrayRef<Elf_Rela>(); 2231 } 2232 2233 template <typename ELFT> 2234 typename ELFDumper<ELFT>::Elf_Relr_Range ELFDumper<ELFT>::dyn_relrs() const { 2235 return DynRelrRegion.getAsArrayRef<Elf_Relr>(); 2236 } 2237 2238 template <class ELFT> void ELFDumper<ELFT>::printFileHeaders() { 2239 ELFDumperStyle->printFileHeaders(ObjF->getELFFile()); 2240 } 2241 2242 template <class ELFT> void ELFDumper<ELFT>::printSectionHeaders() { 2243 ELFDumperStyle->printSectionHeaders(ObjF->getELFFile()); 2244 } 2245 2246 template <class ELFT> void ELFDumper<ELFT>::printRelocations() { 2247 ELFDumperStyle->printRelocations(ObjF->getELFFile()); 2248 } 2249 2250 template <class ELFT> 2251 void ELFDumper<ELFT>::printProgramHeaders( 2252 bool PrintProgramHeaders, cl::boolOrDefault PrintSectionMapping) { 2253 ELFDumperStyle->printProgramHeaders(ObjF->getELFFile(), PrintProgramHeaders, 2254 PrintSectionMapping); 2255 } 2256 2257 template <typename ELFT> void ELFDumper<ELFT>::printVersionInfo() { 2258 // Dump version symbol section. 2259 ELFDumperStyle->printVersionSymbolSection(ObjF->getELFFile(), 2260 SymbolVersionSection); 2261 2262 // Dump version definition section. 2263 ELFDumperStyle->printVersionDefinitionSection(ObjF->getELFFile(), 2264 SymbolVersionDefSection); 2265 2266 // Dump version dependency section. 2267 ELFDumperStyle->printVersionDependencySection(ObjF->getELFFile(), 2268 SymbolVersionNeedSection); 2269 } 2270 2271 template <class ELFT> void ELFDumper<ELFT>::printDependentLibs() { 2272 ELFDumperStyle->printDependentLibs(ObjF->getELFFile()); 2273 } 2274 2275 template <class ELFT> void ELFDumper<ELFT>::printDynamicRelocations() { 2276 ELFDumperStyle->printDynamicRelocations(ObjF->getELFFile()); 2277 } 2278 2279 template <class ELFT> 2280 void ELFDumper<ELFT>::printSymbols(bool PrintSymbols, 2281 bool PrintDynamicSymbols) { 2282 ELFDumperStyle->printSymbols(ObjF->getELFFile(), PrintSymbols, 2283 PrintDynamicSymbols); 2284 } 2285 2286 template <class ELFT> void ELFDumper<ELFT>::printHashSymbols() { 2287 ELFDumperStyle->printHashSymbols(ObjF->getELFFile()); 2288 } 2289 2290 template <class ELFT> void ELFDumper<ELFT>::printHashHistogram() { 2291 ELFDumperStyle->printHashHistogram(ObjF->getELFFile()); 2292 } 2293 2294 template <class ELFT> void ELFDumper<ELFT>::printCGProfile() { 2295 ELFDumperStyle->printCGProfile(ObjF->getELFFile()); 2296 } 2297 2298 template <class ELFT> void ELFDumper<ELFT>::printNotes() { 2299 ELFDumperStyle->printNotes(ObjF->getELFFile()); 2300 } 2301 2302 template <class ELFT> void ELFDumper<ELFT>::printELFLinkerOptions() { 2303 ELFDumperStyle->printELFLinkerOptions(ObjF->getELFFile()); 2304 } 2305 2306 template <class ELFT> void ELFDumper<ELFT>::printStackSizes() { 2307 ELFDumperStyle->printStackSizes(ObjF); 2308 } 2309 2310 #define LLVM_READOBJ_DT_FLAG_ENT(prefix, enum) \ 2311 { #enum, prefix##_##enum } 2312 2313 static const EnumEntry<unsigned> ElfDynamicDTFlags[] = { 2314 LLVM_READOBJ_DT_FLAG_ENT(DF, ORIGIN), 2315 LLVM_READOBJ_DT_FLAG_ENT(DF, SYMBOLIC), 2316 LLVM_READOBJ_DT_FLAG_ENT(DF, TEXTREL), 2317 LLVM_READOBJ_DT_FLAG_ENT(DF, BIND_NOW), 2318 LLVM_READOBJ_DT_FLAG_ENT(DF, STATIC_TLS) 2319 }; 2320 2321 static const EnumEntry<unsigned> ElfDynamicDTFlags1[] = { 2322 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOW), 2323 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAL), 2324 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GROUP), 2325 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODELETE), 2326 LLVM_READOBJ_DT_FLAG_ENT(DF_1, LOADFLTR), 2327 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INITFIRST), 2328 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOOPEN), 2329 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ORIGIN), 2330 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DIRECT), 2331 LLVM_READOBJ_DT_FLAG_ENT(DF_1, TRANS), 2332 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INTERPOSE), 2333 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODEFLIB), 2334 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODUMP), 2335 LLVM_READOBJ_DT_FLAG_ENT(DF_1, CONFALT), 2336 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ENDFILTEE), 2337 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELDNE), 2338 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELPND), 2339 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODIRECT), 2340 LLVM_READOBJ_DT_FLAG_ENT(DF_1, IGNMULDEF), 2341 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOKSYMS), 2342 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOHDR), 2343 LLVM_READOBJ_DT_FLAG_ENT(DF_1, EDITED), 2344 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NORELOC), 2345 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SYMINTPOSE), 2346 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAUDIT), 2347 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SINGLETON) 2348 }; 2349 2350 static const EnumEntry<unsigned> ElfDynamicDTMipsFlags[] = { 2351 LLVM_READOBJ_DT_FLAG_ENT(RHF, NONE), 2352 LLVM_READOBJ_DT_FLAG_ENT(RHF, QUICKSTART), 2353 LLVM_READOBJ_DT_FLAG_ENT(RHF, NOTPOT), 2354 LLVM_READOBJ_DT_FLAG_ENT(RHS, NO_LIBRARY_REPLACEMENT), 2355 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_MOVE), 2356 LLVM_READOBJ_DT_FLAG_ENT(RHF, SGI_ONLY), 2357 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_INIT), 2358 LLVM_READOBJ_DT_FLAG_ENT(RHF, DELTA_C_PLUS_PLUS), 2359 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_START_INIT), 2360 LLVM_READOBJ_DT_FLAG_ENT(RHF, PIXIE), 2361 LLVM_READOBJ_DT_FLAG_ENT(RHF, DEFAULT_DELAY_LOAD), 2362 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTART), 2363 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTARTED), 2364 LLVM_READOBJ_DT_FLAG_ENT(RHF, CORD), 2365 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_UNRES_UNDEF), 2366 LLVM_READOBJ_DT_FLAG_ENT(RHF, RLD_ORDER_SAFE) 2367 }; 2368 2369 #undef LLVM_READOBJ_DT_FLAG_ENT 2370 2371 template <typename T, typename TFlag> 2372 void printFlags(T Value, ArrayRef<EnumEntry<TFlag>> Flags, raw_ostream &OS) { 2373 using FlagEntry = EnumEntry<TFlag>; 2374 using FlagVector = SmallVector<FlagEntry, 10>; 2375 FlagVector SetFlags; 2376 2377 for (const auto &Flag : Flags) { 2378 if (Flag.Value == 0) 2379 continue; 2380 2381 if ((Value & Flag.Value) == Flag.Value) 2382 SetFlags.push_back(Flag); 2383 } 2384 2385 for (const auto &Flag : SetFlags) { 2386 OS << Flag.Name << " "; 2387 } 2388 } 2389 2390 template <class ELFT> 2391 std::string ELFDumper<ELFT>::getDynamicEntry(uint64_t Type, 2392 uint64_t Value) const { 2393 auto FormatHexValue = [](uint64_t V) { 2394 std::string Str; 2395 raw_string_ostream OS(Str); 2396 const char *ConvChar = 2397 (opts::Output == opts::GNU) ? "0x%" PRIx64 : "0x%" PRIX64; 2398 OS << format(ConvChar, V); 2399 return OS.str(); 2400 }; 2401 2402 auto FormatFlags = [](uint64_t V, 2403 llvm::ArrayRef<llvm::EnumEntry<unsigned int>> Array) { 2404 std::string Str; 2405 raw_string_ostream OS(Str); 2406 printFlags(V, Array, OS); 2407 return OS.str(); 2408 }; 2409 2410 // Handle custom printing of architecture specific tags 2411 switch (ObjF->getELFFile()->getHeader()->e_machine) { 2412 case EM_AARCH64: 2413 switch (Type) { 2414 case DT_AARCH64_BTI_PLT: 2415 case DT_AARCH64_PAC_PLT: 2416 return std::to_string(Value); 2417 default: 2418 break; 2419 } 2420 break; 2421 case EM_HEXAGON: 2422 switch (Type) { 2423 case DT_HEXAGON_VER: 2424 return std::to_string(Value); 2425 case DT_HEXAGON_SYMSZ: 2426 case DT_HEXAGON_PLT: 2427 return FormatHexValue(Value); 2428 default: 2429 break; 2430 } 2431 break; 2432 case EM_MIPS: 2433 switch (Type) { 2434 case DT_MIPS_RLD_VERSION: 2435 case DT_MIPS_LOCAL_GOTNO: 2436 case DT_MIPS_SYMTABNO: 2437 case DT_MIPS_UNREFEXTNO: 2438 return std::to_string(Value); 2439 case DT_MIPS_TIME_STAMP: 2440 case DT_MIPS_ICHECKSUM: 2441 case DT_MIPS_IVERSION: 2442 case DT_MIPS_BASE_ADDRESS: 2443 case DT_MIPS_MSYM: 2444 case DT_MIPS_CONFLICT: 2445 case DT_MIPS_LIBLIST: 2446 case DT_MIPS_CONFLICTNO: 2447 case DT_MIPS_LIBLISTNO: 2448 case DT_MIPS_GOTSYM: 2449 case DT_MIPS_HIPAGENO: 2450 case DT_MIPS_RLD_MAP: 2451 case DT_MIPS_DELTA_CLASS: 2452 case DT_MIPS_DELTA_CLASS_NO: 2453 case DT_MIPS_DELTA_INSTANCE: 2454 case DT_MIPS_DELTA_RELOC: 2455 case DT_MIPS_DELTA_RELOC_NO: 2456 case DT_MIPS_DELTA_SYM: 2457 case DT_MIPS_DELTA_SYM_NO: 2458 case DT_MIPS_DELTA_CLASSSYM: 2459 case DT_MIPS_DELTA_CLASSSYM_NO: 2460 case DT_MIPS_CXX_FLAGS: 2461 case DT_MIPS_PIXIE_INIT: 2462 case DT_MIPS_SYMBOL_LIB: 2463 case DT_MIPS_LOCALPAGE_GOTIDX: 2464 case DT_MIPS_LOCAL_GOTIDX: 2465 case DT_MIPS_HIDDEN_GOTIDX: 2466 case DT_MIPS_PROTECTED_GOTIDX: 2467 case DT_MIPS_OPTIONS: 2468 case DT_MIPS_INTERFACE: 2469 case DT_MIPS_DYNSTR_ALIGN: 2470 case DT_MIPS_INTERFACE_SIZE: 2471 case DT_MIPS_RLD_TEXT_RESOLVE_ADDR: 2472 case DT_MIPS_PERF_SUFFIX: 2473 case DT_MIPS_COMPACT_SIZE: 2474 case DT_MIPS_GP_VALUE: 2475 case DT_MIPS_AUX_DYNAMIC: 2476 case DT_MIPS_PLTGOT: 2477 case DT_MIPS_RWPLT: 2478 case DT_MIPS_RLD_MAP_REL: 2479 return FormatHexValue(Value); 2480 case DT_MIPS_FLAGS: 2481 return FormatFlags(Value, makeArrayRef(ElfDynamicDTMipsFlags)); 2482 default: 2483 break; 2484 } 2485 break; 2486 default: 2487 break; 2488 } 2489 2490 switch (Type) { 2491 case DT_PLTREL: 2492 if (Value == DT_REL) 2493 return "REL"; 2494 if (Value == DT_RELA) 2495 return "RELA"; 2496 LLVM_FALLTHROUGH; 2497 case DT_PLTGOT: 2498 case DT_HASH: 2499 case DT_STRTAB: 2500 case DT_SYMTAB: 2501 case DT_RELA: 2502 case DT_INIT: 2503 case DT_FINI: 2504 case DT_REL: 2505 case DT_JMPREL: 2506 case DT_INIT_ARRAY: 2507 case DT_FINI_ARRAY: 2508 case DT_PREINIT_ARRAY: 2509 case DT_DEBUG: 2510 case DT_VERDEF: 2511 case DT_VERNEED: 2512 case DT_VERSYM: 2513 case DT_GNU_HASH: 2514 case DT_NULL: 2515 return FormatHexValue(Value); 2516 case DT_RELACOUNT: 2517 case DT_RELCOUNT: 2518 case DT_VERDEFNUM: 2519 case DT_VERNEEDNUM: 2520 return std::to_string(Value); 2521 case DT_PLTRELSZ: 2522 case DT_RELASZ: 2523 case DT_RELAENT: 2524 case DT_STRSZ: 2525 case DT_SYMENT: 2526 case DT_RELSZ: 2527 case DT_RELENT: 2528 case DT_INIT_ARRAYSZ: 2529 case DT_FINI_ARRAYSZ: 2530 case DT_PREINIT_ARRAYSZ: 2531 case DT_ANDROID_RELSZ: 2532 case DT_ANDROID_RELASZ: 2533 return std::to_string(Value) + " (bytes)"; 2534 case DT_NEEDED: 2535 case DT_SONAME: 2536 case DT_AUXILIARY: 2537 case DT_USED: 2538 case DT_FILTER: 2539 case DT_RPATH: 2540 case DT_RUNPATH: { 2541 const std::map<uint64_t, const char *> TagNames = { 2542 {DT_NEEDED, "Shared library"}, {DT_SONAME, "Library soname"}, 2543 {DT_AUXILIARY, "Auxiliary library"}, {DT_USED, "Not needed object"}, 2544 {DT_FILTER, "Filter library"}, {DT_RPATH, "Library rpath"}, 2545 {DT_RUNPATH, "Library runpath"}, 2546 }; 2547 2548 return (Twine(TagNames.at(Type)) + ": [" + getDynamicString(Value) + "]") 2549 .str(); 2550 } 2551 case DT_FLAGS: 2552 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags)); 2553 case DT_FLAGS_1: 2554 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags1)); 2555 default: 2556 return FormatHexValue(Value); 2557 } 2558 } 2559 2560 template <class ELFT> 2561 StringRef ELFDumper<ELFT>::getDynamicString(uint64_t Value) const { 2562 if (DynamicStringTable.empty() && !DynamicStringTable.data()) { 2563 reportUniqueWarning(createError("string table was not found")); 2564 return "<?>"; 2565 } 2566 2567 auto WarnAndReturn = [this](const Twine &Msg, uint64_t Offset) { 2568 reportUniqueWarning(createError("string table at offset 0x" + 2569 Twine::utohexstr(Offset) + Msg)); 2570 return "<?>"; 2571 }; 2572 2573 const uint64_t FileSize = ObjF->getELFFile()->getBufSize(); 2574 const uint64_t Offset = 2575 (const uint8_t *)DynamicStringTable.data() - ObjF->getELFFile()->base(); 2576 if (DynamicStringTable.size() > FileSize - Offset) 2577 return WarnAndReturn(" with size 0x" + 2578 Twine::utohexstr(DynamicStringTable.size()) + 2579 " goes past the end of the file (0x" + 2580 Twine::utohexstr(FileSize) + ")", 2581 Offset); 2582 2583 if (Value >= DynamicStringTable.size()) 2584 return WarnAndReturn( 2585 ": unable to read the string at 0x" + Twine::utohexstr(Offset + Value) + 2586 ": it goes past the end of the table (0x" + 2587 Twine::utohexstr(Offset + DynamicStringTable.size()) + ")", 2588 Offset); 2589 2590 if (DynamicStringTable.back() != '\0') 2591 return WarnAndReturn(": unable to read the string at 0x" + 2592 Twine::utohexstr(Offset + Value) + 2593 ": the string table is not null-terminated", 2594 Offset); 2595 2596 return DynamicStringTable.data() + Value; 2597 } 2598 2599 template <class ELFT> void ELFDumper<ELFT>::printUnwindInfo() { 2600 DwarfCFIEH::PrinterContext<ELFT> Ctx(W, ObjF); 2601 Ctx.printUnwindInformation(); 2602 } 2603 2604 namespace { 2605 2606 template <> void ELFDumper<ELF32LE>::printUnwindInfo() { 2607 const ELFFile<ELF32LE> *Obj = ObjF->getELFFile(); 2608 const unsigned Machine = Obj->getHeader()->e_machine; 2609 if (Machine == EM_ARM) { 2610 ARM::EHABI::PrinterContext<ELF32LE> Ctx(W, Obj, ObjF->getFileName(), 2611 DotSymtabSec); 2612 Ctx.PrintUnwindInformation(); 2613 } 2614 DwarfCFIEH::PrinterContext<ELF32LE> Ctx(W, ObjF); 2615 Ctx.printUnwindInformation(); 2616 } 2617 2618 } // end anonymous namespace 2619 2620 template <class ELFT> void ELFDumper<ELFT>::printDynamicTable() { 2621 ELFDumperStyle->printDynamic(ObjF->getELFFile()); 2622 } 2623 2624 template <class ELFT> void ELFDumper<ELFT>::printNeededLibraries() { 2625 ListScope D(W, "NeededLibraries"); 2626 2627 std::vector<StringRef> Libs; 2628 for (const auto &Entry : dynamic_table()) 2629 if (Entry.d_tag == ELF::DT_NEEDED) 2630 Libs.push_back(getDynamicString(Entry.d_un.d_val)); 2631 2632 llvm::sort(Libs); 2633 2634 for (StringRef L : Libs) 2635 W.startLine() << L << "\n"; 2636 } 2637 2638 template <class ELFT> 2639 static bool checkHashTable(const ELFFile<ELFT> *Obj, 2640 const typename ELFT::Hash *H, StringRef FileName) { 2641 auto WarnAndReturn = [&](uint64_t Off, const Twine &Msg = "") { 2642 reportWarning(createError("the hash table at offset 0x" + 2643 Twine::utohexstr(Off) + 2644 " goes past the end of the file (0x" + 2645 Twine::utohexstr(Obj->getBufSize()) + ")" + Msg), 2646 FileName); 2647 return false; 2648 }; 2649 2650 // Each SHT_HASH section starts from two 32-bit fields: nbucket and nchain. 2651 const unsigned HeaderSize = 2 * sizeof(typename ELFT::Word); 2652 const uint64_t SecOffset = (const uint8_t *)H - Obj->base(); 2653 if (Obj->getBufSize() - SecOffset < HeaderSize) 2654 return WarnAndReturn(SecOffset); 2655 2656 if (Obj->getBufSize() - SecOffset - HeaderSize < 2657 ((uint64_t)H->nbucket + H->nchain) * sizeof(typename ELFT::Word)) 2658 return WarnAndReturn(SecOffset, ", nbucket = " + Twine(H->nbucket) + 2659 ", nchain = " + Twine(H->nchain)); 2660 return true; 2661 } 2662 2663 template <typename ELFT> void ELFDumper<ELFT>::printHashTable() { 2664 DictScope D(W, "HashTable"); 2665 if (!HashTable || 2666 !checkHashTable(ObjF->getELFFile(), HashTable, ObjF->getFileName())) 2667 return; 2668 W.printNumber("Num Buckets", HashTable->nbucket); 2669 W.printNumber("Num Chains", HashTable->nchain); 2670 W.printList("Buckets", HashTable->buckets()); 2671 W.printList("Chains", HashTable->chains()); 2672 } 2673 2674 template <typename ELFT> 2675 void ELFDumper<ELFT>::printGnuHashTable(const object::ObjectFile *Obj) { 2676 DictScope D(W, "GnuHashTable"); 2677 if (!GnuHashTable) 2678 return; 2679 W.printNumber("Num Buckets", GnuHashTable->nbuckets); 2680 W.printNumber("First Hashed Symbol Index", GnuHashTable->symndx); 2681 W.printNumber("Num Mask Words", GnuHashTable->maskwords); 2682 W.printNumber("Shift Count", GnuHashTable->shift2); 2683 2684 MemoryBufferRef File = Obj->getMemoryBufferRef(); 2685 const char *TableData = reinterpret_cast<const char *>(GnuHashTable); 2686 assert(TableData >= File.getBufferStart() && 2687 TableData < File.getBufferEnd() && 2688 "GnuHashTable must always point to a location inside the file"); 2689 2690 uint64_t TableOffset = TableData - File.getBufferStart(); 2691 if (TableOffset + 2692 /*Header size:*/ 16 + GnuHashTable->nbuckets * 4 + 2693 GnuHashTable->maskwords * sizeof(typename ELFT::Off) >= 2694 File.getBufferSize()) { 2695 reportWarning(createError("unable to dump the SHT_GNU_HASH " 2696 "section at 0x" + 2697 Twine::utohexstr(TableOffset) + 2698 ": it goes past the end of the file"), 2699 ObjF->getFileName()); 2700 return; 2701 } 2702 2703 ArrayRef<typename ELFT::Off> BloomFilter = GnuHashTable->filter(); 2704 W.printHexList("Bloom Filter", BloomFilter); 2705 2706 ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets(); 2707 W.printList("Buckets", Buckets); 2708 2709 if (!DynSymRegion) { 2710 reportWarning(createError("unable to dump 'Values' for the SHT_GNU_HASH " 2711 "section: no dynamic symbol table found"), 2712 ObjF->getFileName()); 2713 return; 2714 } 2715 2716 size_t NumSyms = dynamic_symbols().size(); 2717 if (!NumSyms) { 2718 reportWarning(createError("unable to dump 'Values' for the SHT_GNU_HASH " 2719 "section: the dynamic symbol table is empty"), 2720 ObjF->getFileName()); 2721 return; 2722 } 2723 2724 if (GnuHashTable->symndx >= NumSyms) { 2725 // A normal empty GNU hash table section produced by linker might have 2726 // symndx set to the number of dynamic symbols + 1 (for the zero symbol) 2727 // and have dummy null values in the Bloom filter and in the buckets 2728 // vector. It happens because the value of symndx is not important for 2729 // dynamic loaders when the GNU hash table is empty. They just skip the 2730 // whole object during symbol lookup. In such cases, the symndx value is 2731 // irrelevant and we should not report a warning. 2732 bool IsEmptyHashTable = 2733 llvm::all_of(Buckets, [](Elf_Word V) { return V == 0; }); 2734 2735 if (!IsEmptyHashTable) { 2736 reportWarning( 2737 createError("the first hashed symbol index (" + 2738 Twine(GnuHashTable->symndx) + 2739 ") is larger than the number of dynamic symbols (" + 2740 Twine(NumSyms) + ")"), 2741 ObjF->getFileName()); 2742 return; 2743 } 2744 } 2745 2746 W.printHexList("Values", GnuHashTable->values(NumSyms)); 2747 } 2748 2749 template <typename ELFT> void ELFDumper<ELFT>::printLoadName() { 2750 W.printString("LoadName", SOName); 2751 } 2752 2753 template <class ELFT> void ELFDumper<ELFT>::printArchSpecificInfo() { 2754 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2755 switch (Obj->getHeader()->e_machine) { 2756 case EM_ARM: 2757 case EM_RISCV: 2758 printAttributes(); 2759 break; 2760 case EM_MIPS: { 2761 ELFDumperStyle->printMipsABIFlags(ObjF); 2762 printMipsOptions(); 2763 printMipsReginfo(); 2764 2765 MipsGOTParser<ELFT> Parser(Obj, ObjF->getFileName(), dynamic_table(), 2766 dynamic_symbols()); 2767 if (Parser.hasGot()) 2768 ELFDumperStyle->printMipsGOT(Parser); 2769 if (Parser.hasPlt()) 2770 ELFDumperStyle->printMipsPLT(Parser); 2771 break; 2772 } 2773 default: 2774 break; 2775 } 2776 } 2777 2778 namespace { 2779 2780 template <class ELFT> void ELFDumper<ELFT>::printAttributes() { 2781 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2782 if (!Obj->isLE()) { 2783 W.startLine() << "Attributes not implemented.\n"; 2784 return; 2785 } 2786 2787 const unsigned Machine = Obj->getHeader()->e_machine; 2788 assert((Machine == EM_ARM || Machine == EM_RISCV) && 2789 "Attributes not implemented."); 2790 2791 DictScope BA(W, "BuildAttributes"); 2792 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 2793 if (Sec.sh_type != ELF::SHT_ARM_ATTRIBUTES && 2794 Sec.sh_type != ELF::SHT_RISCV_ATTRIBUTES) 2795 continue; 2796 2797 ArrayRef<uint8_t> Contents = 2798 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(&Sec)); 2799 if (Contents[0] != ELFAttrs::Format_Version) { 2800 reportWarning(createError(Twine("unrecognised FormatVersion: 0x") + 2801 Twine::utohexstr(Contents[0])), 2802 ObjF->getFileName()); 2803 continue; 2804 } 2805 W.printHex("FormatVersion", Contents[0]); 2806 if (Contents.size() == 1) 2807 continue; 2808 2809 // TODO: Delete the redundant FormatVersion check above. 2810 if (Machine == EM_ARM) { 2811 if (Error E = ARMAttributeParser(&W).parse(Contents, support::little)) 2812 reportWarning(std::move(E), ObjF->getFileName()); 2813 } else if (Machine == EM_RISCV) { 2814 if (Error E = RISCVAttributeParser(&W).parse(Contents, support::little)) 2815 reportWarning(std::move(E), ObjF->getFileName()); 2816 } 2817 } 2818 } 2819 2820 template <class ELFT> class MipsGOTParser { 2821 public: 2822 TYPEDEF_ELF_TYPES(ELFT) 2823 using Entry = typename ELFO::Elf_Addr; 2824 using Entries = ArrayRef<Entry>; 2825 2826 const bool IsStatic; 2827 const ELFO * const Obj; 2828 2829 MipsGOTParser(const ELFO *Obj, StringRef FileName, Elf_Dyn_Range DynTable, 2830 Elf_Sym_Range DynSyms); 2831 2832 bool hasGot() const { return !GotEntries.empty(); } 2833 bool hasPlt() const { return !PltEntries.empty(); } 2834 2835 uint64_t getGp() const; 2836 2837 const Entry *getGotLazyResolver() const; 2838 const Entry *getGotModulePointer() const; 2839 const Entry *getPltLazyResolver() const; 2840 const Entry *getPltModulePointer() const; 2841 2842 Entries getLocalEntries() const; 2843 Entries getGlobalEntries() const; 2844 Entries getOtherEntries() const; 2845 Entries getPltEntries() const; 2846 2847 uint64_t getGotAddress(const Entry * E) const; 2848 int64_t getGotOffset(const Entry * E) const; 2849 const Elf_Sym *getGotSym(const Entry *E) const; 2850 2851 uint64_t getPltAddress(const Entry * E) const; 2852 const Elf_Sym *getPltSym(const Entry *E) const; 2853 2854 StringRef getPltStrTable() const { return PltStrTable; } 2855 2856 private: 2857 const Elf_Shdr *GotSec; 2858 size_t LocalNum; 2859 size_t GlobalNum; 2860 2861 const Elf_Shdr *PltSec; 2862 const Elf_Shdr *PltRelSec; 2863 const Elf_Shdr *PltSymTable; 2864 StringRef FileName; 2865 2866 Elf_Sym_Range GotDynSyms; 2867 StringRef PltStrTable; 2868 2869 Entries GotEntries; 2870 Entries PltEntries; 2871 }; 2872 2873 } // end anonymous namespace 2874 2875 template <class ELFT> 2876 MipsGOTParser<ELFT>::MipsGOTParser(const ELFO *Obj, StringRef FileName, 2877 Elf_Dyn_Range DynTable, 2878 Elf_Sym_Range DynSyms) 2879 : IsStatic(DynTable.empty()), Obj(Obj), GotSec(nullptr), LocalNum(0), 2880 GlobalNum(0), PltSec(nullptr), PltRelSec(nullptr), PltSymTable(nullptr), 2881 FileName(FileName) { 2882 // See "Global Offset Table" in Chapter 5 in the following document 2883 // for detailed GOT description. 2884 // ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf 2885 2886 // Find static GOT secton. 2887 if (IsStatic) { 2888 GotSec = findSectionByName(*Obj, FileName, ".got"); 2889 if (!GotSec) 2890 return; 2891 2892 ArrayRef<uint8_t> Content = 2893 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 2894 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2895 Content.size() / sizeof(Entry)); 2896 LocalNum = GotEntries.size(); 2897 return; 2898 } 2899 2900 // Lookup dynamic table tags which define GOT/PLT layouts. 2901 Optional<uint64_t> DtPltGot; 2902 Optional<uint64_t> DtLocalGotNum; 2903 Optional<uint64_t> DtGotSym; 2904 Optional<uint64_t> DtMipsPltGot; 2905 Optional<uint64_t> DtJmpRel; 2906 for (const auto &Entry : DynTable) { 2907 switch (Entry.getTag()) { 2908 case ELF::DT_PLTGOT: 2909 DtPltGot = Entry.getVal(); 2910 break; 2911 case ELF::DT_MIPS_LOCAL_GOTNO: 2912 DtLocalGotNum = Entry.getVal(); 2913 break; 2914 case ELF::DT_MIPS_GOTSYM: 2915 DtGotSym = Entry.getVal(); 2916 break; 2917 case ELF::DT_MIPS_PLTGOT: 2918 DtMipsPltGot = Entry.getVal(); 2919 break; 2920 case ELF::DT_JMPREL: 2921 DtJmpRel = Entry.getVal(); 2922 break; 2923 } 2924 } 2925 2926 // Find dynamic GOT section. 2927 if (DtPltGot || DtLocalGotNum || DtGotSym) { 2928 if (!DtPltGot) 2929 report_fatal_error("Cannot find PLTGOT dynamic table tag."); 2930 if (!DtLocalGotNum) 2931 report_fatal_error("Cannot find MIPS_LOCAL_GOTNO dynamic table tag."); 2932 if (!DtGotSym) 2933 report_fatal_error("Cannot find MIPS_GOTSYM dynamic table tag."); 2934 2935 size_t DynSymTotal = DynSyms.size(); 2936 if (*DtGotSym > DynSymTotal) 2937 reportError( 2938 createError("MIPS_GOTSYM exceeds a number of dynamic symbols"), 2939 FileName); 2940 2941 GotSec = findNotEmptySectionByAddress(Obj, FileName, *DtPltGot); 2942 if (!GotSec) 2943 reportError(createError("There is no not empty GOT section at 0x" + 2944 Twine::utohexstr(*DtPltGot)), 2945 FileName); 2946 2947 LocalNum = *DtLocalGotNum; 2948 GlobalNum = DynSymTotal - *DtGotSym; 2949 2950 ArrayRef<uint8_t> Content = 2951 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 2952 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2953 Content.size() / sizeof(Entry)); 2954 GotDynSyms = DynSyms.drop_front(*DtGotSym); 2955 } 2956 2957 // Find PLT section. 2958 if (DtMipsPltGot || DtJmpRel) { 2959 if (!DtMipsPltGot) 2960 report_fatal_error("Cannot find MIPS_PLTGOT dynamic table tag."); 2961 if (!DtJmpRel) 2962 report_fatal_error("Cannot find JMPREL dynamic table tag."); 2963 2964 PltSec = findNotEmptySectionByAddress(Obj, FileName, * DtMipsPltGot); 2965 if (!PltSec) 2966 report_fatal_error("There is no not empty PLTGOT section at 0x " + 2967 Twine::utohexstr(*DtMipsPltGot)); 2968 2969 PltRelSec = findNotEmptySectionByAddress(Obj, FileName, * DtJmpRel); 2970 if (!PltRelSec) 2971 report_fatal_error("There is no not empty RELPLT section at 0x" + 2972 Twine::utohexstr(*DtJmpRel)); 2973 2974 ArrayRef<uint8_t> PltContent = 2975 unwrapOrError(FileName, Obj->getSectionContents(PltSec)); 2976 PltEntries = Entries(reinterpret_cast<const Entry *>(PltContent.data()), 2977 PltContent.size() / sizeof(Entry)); 2978 2979 PltSymTable = unwrapOrError(FileName, Obj->getSection(PltRelSec->sh_link)); 2980 PltStrTable = 2981 unwrapOrError(FileName, Obj->getStringTableForSymtab(*PltSymTable)); 2982 } 2983 } 2984 2985 template <class ELFT> uint64_t MipsGOTParser<ELFT>::getGp() const { 2986 return GotSec->sh_addr + 0x7ff0; 2987 } 2988 2989 template <class ELFT> 2990 const typename MipsGOTParser<ELFT>::Entry * 2991 MipsGOTParser<ELFT>::getGotLazyResolver() const { 2992 return LocalNum > 0 ? &GotEntries[0] : nullptr; 2993 } 2994 2995 template <class ELFT> 2996 const typename MipsGOTParser<ELFT>::Entry * 2997 MipsGOTParser<ELFT>::getGotModulePointer() const { 2998 if (LocalNum < 2) 2999 return nullptr; 3000 const Entry &E = GotEntries[1]; 3001 if ((E >> (sizeof(Entry) * 8 - 1)) == 0) 3002 return nullptr; 3003 return &E; 3004 } 3005 3006 template <class ELFT> 3007 typename MipsGOTParser<ELFT>::Entries 3008 MipsGOTParser<ELFT>::getLocalEntries() const { 3009 size_t Skip = getGotModulePointer() ? 2 : 1; 3010 if (LocalNum - Skip <= 0) 3011 return Entries(); 3012 return GotEntries.slice(Skip, LocalNum - Skip); 3013 } 3014 3015 template <class ELFT> 3016 typename MipsGOTParser<ELFT>::Entries 3017 MipsGOTParser<ELFT>::getGlobalEntries() const { 3018 if (GlobalNum == 0) 3019 return Entries(); 3020 return GotEntries.slice(LocalNum, GlobalNum); 3021 } 3022 3023 template <class ELFT> 3024 typename MipsGOTParser<ELFT>::Entries 3025 MipsGOTParser<ELFT>::getOtherEntries() const { 3026 size_t OtherNum = GotEntries.size() - LocalNum - GlobalNum; 3027 if (OtherNum == 0) 3028 return Entries(); 3029 return GotEntries.slice(LocalNum + GlobalNum, OtherNum); 3030 } 3031 3032 template <class ELFT> 3033 uint64_t MipsGOTParser<ELFT>::getGotAddress(const Entry *E) const { 3034 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3035 return GotSec->sh_addr + Offset; 3036 } 3037 3038 template <class ELFT> 3039 int64_t MipsGOTParser<ELFT>::getGotOffset(const Entry *E) const { 3040 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3041 return Offset - 0x7ff0; 3042 } 3043 3044 template <class ELFT> 3045 const typename MipsGOTParser<ELFT>::Elf_Sym * 3046 MipsGOTParser<ELFT>::getGotSym(const Entry *E) const { 3047 int64_t Offset = std::distance(GotEntries.data(), E); 3048 return &GotDynSyms[Offset - LocalNum]; 3049 } 3050 3051 template <class ELFT> 3052 const typename MipsGOTParser<ELFT>::Entry * 3053 MipsGOTParser<ELFT>::getPltLazyResolver() const { 3054 return PltEntries.empty() ? nullptr : &PltEntries[0]; 3055 } 3056 3057 template <class ELFT> 3058 const typename MipsGOTParser<ELFT>::Entry * 3059 MipsGOTParser<ELFT>::getPltModulePointer() const { 3060 return PltEntries.size() < 2 ? nullptr : &PltEntries[1]; 3061 } 3062 3063 template <class ELFT> 3064 typename MipsGOTParser<ELFT>::Entries 3065 MipsGOTParser<ELFT>::getPltEntries() const { 3066 if (PltEntries.size() <= 2) 3067 return Entries(); 3068 return PltEntries.slice(2, PltEntries.size() - 2); 3069 } 3070 3071 template <class ELFT> 3072 uint64_t MipsGOTParser<ELFT>::getPltAddress(const Entry *E) const { 3073 int64_t Offset = std::distance(PltEntries.data(), E) * sizeof(Entry); 3074 return PltSec->sh_addr + Offset; 3075 } 3076 3077 template <class ELFT> 3078 const typename MipsGOTParser<ELFT>::Elf_Sym * 3079 MipsGOTParser<ELFT>::getPltSym(const Entry *E) const { 3080 int64_t Offset = std::distance(getPltEntries().data(), E); 3081 if (PltRelSec->sh_type == ELF::SHT_REL) { 3082 Elf_Rel_Range Rels = unwrapOrError(FileName, Obj->rels(PltRelSec)); 3083 return unwrapOrError(FileName, 3084 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3085 } else { 3086 Elf_Rela_Range Rels = unwrapOrError(FileName, Obj->relas(PltRelSec)); 3087 return unwrapOrError(FileName, 3088 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3089 } 3090 } 3091 3092 static const EnumEntry<unsigned> ElfMipsISAExtType[] = { 3093 {"None", Mips::AFL_EXT_NONE}, 3094 {"Broadcom SB-1", Mips::AFL_EXT_SB1}, 3095 {"Cavium Networks Octeon", Mips::AFL_EXT_OCTEON}, 3096 {"Cavium Networks Octeon2", Mips::AFL_EXT_OCTEON2}, 3097 {"Cavium Networks OcteonP", Mips::AFL_EXT_OCTEONP}, 3098 {"Cavium Networks Octeon3", Mips::AFL_EXT_OCTEON3}, 3099 {"LSI R4010", Mips::AFL_EXT_4010}, 3100 {"Loongson 2E", Mips::AFL_EXT_LOONGSON_2E}, 3101 {"Loongson 2F", Mips::AFL_EXT_LOONGSON_2F}, 3102 {"Loongson 3A", Mips::AFL_EXT_LOONGSON_3A}, 3103 {"MIPS R4650", Mips::AFL_EXT_4650}, 3104 {"MIPS R5900", Mips::AFL_EXT_5900}, 3105 {"MIPS R10000", Mips::AFL_EXT_10000}, 3106 {"NEC VR4100", Mips::AFL_EXT_4100}, 3107 {"NEC VR4111/VR4181", Mips::AFL_EXT_4111}, 3108 {"NEC VR4120", Mips::AFL_EXT_4120}, 3109 {"NEC VR5400", Mips::AFL_EXT_5400}, 3110 {"NEC VR5500", Mips::AFL_EXT_5500}, 3111 {"RMI Xlr", Mips::AFL_EXT_XLR}, 3112 {"Toshiba R3900", Mips::AFL_EXT_3900} 3113 }; 3114 3115 static const EnumEntry<unsigned> ElfMipsASEFlags[] = { 3116 {"DSP", Mips::AFL_ASE_DSP}, 3117 {"DSPR2", Mips::AFL_ASE_DSPR2}, 3118 {"Enhanced VA Scheme", Mips::AFL_ASE_EVA}, 3119 {"MCU", Mips::AFL_ASE_MCU}, 3120 {"MDMX", Mips::AFL_ASE_MDMX}, 3121 {"MIPS-3D", Mips::AFL_ASE_MIPS3D}, 3122 {"MT", Mips::AFL_ASE_MT}, 3123 {"SmartMIPS", Mips::AFL_ASE_SMARTMIPS}, 3124 {"VZ", Mips::AFL_ASE_VIRT}, 3125 {"MSA", Mips::AFL_ASE_MSA}, 3126 {"MIPS16", Mips::AFL_ASE_MIPS16}, 3127 {"microMIPS", Mips::AFL_ASE_MICROMIPS}, 3128 {"XPA", Mips::AFL_ASE_XPA}, 3129 {"CRC", Mips::AFL_ASE_CRC}, 3130 {"GINV", Mips::AFL_ASE_GINV}, 3131 }; 3132 3133 static const EnumEntry<unsigned> ElfMipsFpABIType[] = { 3134 {"Hard or soft float", Mips::Val_GNU_MIPS_ABI_FP_ANY}, 3135 {"Hard float (double precision)", Mips::Val_GNU_MIPS_ABI_FP_DOUBLE}, 3136 {"Hard float (single precision)", Mips::Val_GNU_MIPS_ABI_FP_SINGLE}, 3137 {"Soft float", Mips::Val_GNU_MIPS_ABI_FP_SOFT}, 3138 {"Hard float (MIPS32r2 64-bit FPU 12 callee-saved)", 3139 Mips::Val_GNU_MIPS_ABI_FP_OLD_64}, 3140 {"Hard float (32-bit CPU, Any FPU)", Mips::Val_GNU_MIPS_ABI_FP_XX}, 3141 {"Hard float (32-bit CPU, 64-bit FPU)", Mips::Val_GNU_MIPS_ABI_FP_64}, 3142 {"Hard float compat (32-bit CPU, 64-bit FPU)", 3143 Mips::Val_GNU_MIPS_ABI_FP_64A} 3144 }; 3145 3146 static const EnumEntry<unsigned> ElfMipsFlags1[] { 3147 {"ODDSPREG", Mips::AFL_FLAGS1_ODDSPREG}, 3148 }; 3149 3150 static int getMipsRegisterSize(uint8_t Flag) { 3151 switch (Flag) { 3152 case Mips::AFL_REG_NONE: 3153 return 0; 3154 case Mips::AFL_REG_32: 3155 return 32; 3156 case Mips::AFL_REG_64: 3157 return 64; 3158 case Mips::AFL_REG_128: 3159 return 128; 3160 default: 3161 return -1; 3162 } 3163 } 3164 3165 template <class ELFT> 3166 static void printMipsReginfoData(ScopedPrinter &W, 3167 const Elf_Mips_RegInfo<ELFT> &Reginfo) { 3168 W.printHex("GP", Reginfo.ri_gp_value); 3169 W.printHex("General Mask", Reginfo.ri_gprmask); 3170 W.printHex("Co-Proc Mask0", Reginfo.ri_cprmask[0]); 3171 W.printHex("Co-Proc Mask1", Reginfo.ri_cprmask[1]); 3172 W.printHex("Co-Proc Mask2", Reginfo.ri_cprmask[2]); 3173 W.printHex("Co-Proc Mask3", Reginfo.ri_cprmask[3]); 3174 } 3175 3176 template <class ELFT> void ELFDumper<ELFT>::printMipsReginfo() { 3177 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3178 const Elf_Shdr *Shdr = findSectionByName(*Obj, ObjF->getFileName(), ".reginfo"); 3179 if (!Shdr) { 3180 W.startLine() << "There is no .reginfo section in the file.\n"; 3181 return; 3182 } 3183 ArrayRef<uint8_t> Sec = 3184 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3185 if (Sec.size() != sizeof(Elf_Mips_RegInfo<ELFT>)) { 3186 W.startLine() << "The .reginfo section has a wrong size.\n"; 3187 return; 3188 } 3189 3190 DictScope GS(W, "MIPS RegInfo"); 3191 auto *Reginfo = reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(Sec.data()); 3192 printMipsReginfoData(W, *Reginfo); 3193 } 3194 3195 template <class ELFT> void ELFDumper<ELFT>::printMipsOptions() { 3196 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3197 const Elf_Shdr *Shdr = 3198 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.options"); 3199 if (!Shdr) { 3200 W.startLine() << "There is no .MIPS.options section in the file.\n"; 3201 return; 3202 } 3203 3204 DictScope GS(W, "MIPS Options"); 3205 3206 ArrayRef<uint8_t> Sec = 3207 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3208 while (!Sec.empty()) { 3209 if (Sec.size() < sizeof(Elf_Mips_Options<ELFT>)) { 3210 W.startLine() << "The .MIPS.options section has a wrong size.\n"; 3211 return; 3212 } 3213 auto *O = reinterpret_cast<const Elf_Mips_Options<ELFT> *>(Sec.data()); 3214 DictScope GS(W, getElfMipsOptionsOdkType(O->kind)); 3215 switch (O->kind) { 3216 case ODK_REGINFO: 3217 printMipsReginfoData(W, O->getRegInfo()); 3218 break; 3219 default: 3220 W.startLine() << "Unsupported MIPS options tag.\n"; 3221 break; 3222 } 3223 Sec = Sec.slice(O->size); 3224 } 3225 } 3226 3227 template <class ELFT> void ELFDumper<ELFT>::printStackMap() const { 3228 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3229 const Elf_Shdr *StackMapSection = nullptr; 3230 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 3231 StringRef Name = 3232 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec)); 3233 if (Name == ".llvm_stackmaps") { 3234 StackMapSection = &Sec; 3235 break; 3236 } 3237 } 3238 3239 if (!StackMapSection) 3240 return; 3241 3242 ArrayRef<uint8_t> StackMapContentsArray = unwrapOrError( 3243 ObjF->getFileName(), Obj->getSectionContents(StackMapSection)); 3244 3245 prettyPrintStackMap( 3246 W, StackMapParser<ELFT::TargetEndianness>(StackMapContentsArray)); 3247 } 3248 3249 template <class ELFT> void ELFDumper<ELFT>::printGroupSections() { 3250 ELFDumperStyle->printGroupSections(ObjF->getELFFile()); 3251 } 3252 3253 template <class ELFT> void ELFDumper<ELFT>::printAddrsig() { 3254 ELFDumperStyle->printAddrsig(ObjF->getELFFile()); 3255 } 3256 3257 static inline void printFields(formatted_raw_ostream &OS, StringRef Str1, 3258 StringRef Str2) { 3259 OS.PadToColumn(2u); 3260 OS << Str1; 3261 OS.PadToColumn(37u); 3262 OS << Str2 << "\n"; 3263 OS.flush(); 3264 } 3265 3266 template <class ELFT> 3267 static std::string getSectionHeadersNumString(const ELFFile<ELFT> *Obj, 3268 StringRef FileName) { 3269 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3270 if (ElfHeader->e_shnum != 0) 3271 return to_string(ElfHeader->e_shnum); 3272 3273 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3274 if (Arr.empty()) 3275 return "0"; 3276 return "0 (" + to_string(Arr[0].sh_size) + ")"; 3277 } 3278 3279 template <class ELFT> 3280 static std::string getSectionHeaderTableIndexString(const ELFFile<ELFT> *Obj, 3281 StringRef FileName) { 3282 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3283 if (ElfHeader->e_shstrndx != SHN_XINDEX) 3284 return to_string(ElfHeader->e_shstrndx); 3285 3286 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3287 if (Arr.empty()) 3288 return "65535 (corrupt: out of range)"; 3289 return to_string(ElfHeader->e_shstrndx) + " (" + to_string(Arr[0].sh_link) + 3290 ")"; 3291 } 3292 3293 template <class ELFT> void GNUStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 3294 const Elf_Ehdr *e = Obj->getHeader(); 3295 OS << "ELF Header:\n"; 3296 OS << " Magic: "; 3297 std::string Str; 3298 for (int i = 0; i < ELF::EI_NIDENT; i++) 3299 OS << format(" %02x", static_cast<int>(e->e_ident[i])); 3300 OS << "\n"; 3301 Str = printEnum(e->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 3302 printFields(OS, "Class:", Str); 3303 Str = printEnum(e->e_ident[ELF::EI_DATA], makeArrayRef(ElfDataEncoding)); 3304 printFields(OS, "Data:", Str); 3305 OS.PadToColumn(2u); 3306 OS << "Version:"; 3307 OS.PadToColumn(37u); 3308 OS << to_hexString(e->e_ident[ELF::EI_VERSION]); 3309 if (e->e_version == ELF::EV_CURRENT) 3310 OS << " (current)"; 3311 OS << "\n"; 3312 Str = printEnum(e->e_ident[ELF::EI_OSABI], makeArrayRef(ElfOSABI)); 3313 printFields(OS, "OS/ABI:", Str); 3314 printFields(OS, 3315 "ABI Version:", std::to_string(e->e_ident[ELF::EI_ABIVERSION])); 3316 Str = printEnum(e->e_type, makeArrayRef(ElfObjectFileType)); 3317 printFields(OS, "Type:", Str); 3318 Str = printEnum(e->e_machine, makeArrayRef(ElfMachineType)); 3319 printFields(OS, "Machine:", Str); 3320 Str = "0x" + to_hexString(e->e_version); 3321 printFields(OS, "Version:", Str); 3322 Str = "0x" + to_hexString(e->e_entry); 3323 printFields(OS, "Entry point address:", Str); 3324 Str = to_string(e->e_phoff) + " (bytes into file)"; 3325 printFields(OS, "Start of program headers:", Str); 3326 Str = to_string(e->e_shoff) + " (bytes into file)"; 3327 printFields(OS, "Start of section headers:", Str); 3328 std::string ElfFlags; 3329 if (e->e_machine == EM_MIPS) 3330 ElfFlags = 3331 printFlags(e->e_flags, makeArrayRef(ElfHeaderMipsFlags), 3332 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 3333 unsigned(ELF::EF_MIPS_MACH)); 3334 else if (e->e_machine == EM_RISCV) 3335 ElfFlags = printFlags(e->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 3336 Str = "0x" + to_hexString(e->e_flags); 3337 if (!ElfFlags.empty()) 3338 Str = Str + ", " + ElfFlags; 3339 printFields(OS, "Flags:", Str); 3340 Str = to_string(e->e_ehsize) + " (bytes)"; 3341 printFields(OS, "Size of this header:", Str); 3342 Str = to_string(e->e_phentsize) + " (bytes)"; 3343 printFields(OS, "Size of program headers:", Str); 3344 Str = to_string(e->e_phnum); 3345 printFields(OS, "Number of program headers:", Str); 3346 Str = to_string(e->e_shentsize) + " (bytes)"; 3347 printFields(OS, "Size of section headers:", Str); 3348 Str = getSectionHeadersNumString(Obj, this->FileName); 3349 printFields(OS, "Number of section headers:", Str); 3350 Str = getSectionHeaderTableIndexString(Obj, this->FileName); 3351 printFields(OS, "Section header string table index:", Str); 3352 } 3353 3354 namespace { 3355 struct GroupMember { 3356 StringRef Name; 3357 uint64_t Index; 3358 }; 3359 3360 struct GroupSection { 3361 StringRef Name; 3362 std::string Signature; 3363 uint64_t ShName; 3364 uint64_t Index; 3365 uint32_t Link; 3366 uint32_t Info; 3367 uint32_t Type; 3368 std::vector<GroupMember> Members; 3369 }; 3370 3371 template <class ELFT> 3372 std::vector<GroupSection> getGroups(const ELFFile<ELFT> *Obj, 3373 StringRef FileName) { 3374 using Elf_Shdr = typename ELFT::Shdr; 3375 using Elf_Sym = typename ELFT::Sym; 3376 using Elf_Word = typename ELFT::Word; 3377 3378 std::vector<GroupSection> Ret; 3379 uint64_t I = 0; 3380 for (const Elf_Shdr &Sec : unwrapOrError(FileName, Obj->sections())) { 3381 ++I; 3382 if (Sec.sh_type != ELF::SHT_GROUP) 3383 continue; 3384 3385 const Elf_Shdr *Symtab = 3386 unwrapOrError(FileName, Obj->getSection(Sec.sh_link)); 3387 StringRef StrTable = 3388 unwrapOrError(FileName, Obj->getStringTableForSymtab(*Symtab)); 3389 const Elf_Sym *Sym = unwrapOrError( 3390 FileName, Obj->template getEntry<Elf_Sym>(Symtab, Sec.sh_info)); 3391 auto Data = unwrapOrError( 3392 FileName, Obj->template getSectionContentsAsArray<Elf_Word>(&Sec)); 3393 3394 StringRef Name = unwrapOrError(FileName, Obj->getSectionName(&Sec)); 3395 StringRef Signature = StrTable.data() + Sym->st_name; 3396 Ret.push_back({Name, 3397 maybeDemangle(Signature), 3398 Sec.sh_name, 3399 I - 1, 3400 Sec.sh_link, 3401 Sec.sh_info, 3402 Data[0], 3403 {}}); 3404 3405 std::vector<GroupMember> &GM = Ret.back().Members; 3406 for (uint32_t Ndx : Data.slice(1)) { 3407 auto Sec = unwrapOrError(FileName, Obj->getSection(Ndx)); 3408 const StringRef Name = unwrapOrError(FileName, Obj->getSectionName(Sec)); 3409 GM.push_back({Name, Ndx}); 3410 } 3411 } 3412 return Ret; 3413 } 3414 3415 DenseMap<uint64_t, const GroupSection *> 3416 mapSectionsToGroups(ArrayRef<GroupSection> Groups) { 3417 DenseMap<uint64_t, const GroupSection *> Ret; 3418 for (const GroupSection &G : Groups) 3419 for (const GroupMember &GM : G.Members) 3420 Ret.insert({GM.Index, &G}); 3421 return Ret; 3422 } 3423 3424 } // namespace 3425 3426 template <class ELFT> void GNUStyle<ELFT>::printGroupSections(const ELFO *Obj) { 3427 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 3428 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 3429 for (const GroupSection &G : V) { 3430 OS << "\n" 3431 << getGroupType(G.Type) << " group section [" 3432 << format_decimal(G.Index, 5) << "] `" << G.Name << "' [" << G.Signature 3433 << "] contains " << G.Members.size() << " sections:\n" 3434 << " [Index] Name\n"; 3435 for (const GroupMember &GM : G.Members) { 3436 const GroupSection *MainGroup = Map[GM.Index]; 3437 if (MainGroup != &G) { 3438 OS.flush(); 3439 errs() << "Error: section [" << format_decimal(GM.Index, 5) 3440 << "] in group section [" << format_decimal(G.Index, 5) 3441 << "] already in group section [" 3442 << format_decimal(MainGroup->Index, 5) << "]"; 3443 errs().flush(); 3444 continue; 3445 } 3446 OS << " [" << format_decimal(GM.Index, 5) << "] " << GM.Name << "\n"; 3447 } 3448 } 3449 3450 if (V.empty()) 3451 OS << "There are no section groups in this file.\n"; 3452 } 3453 3454 template <class ELFT> 3455 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 3456 const Elf_Shdr *SymTab, const Elf_Rela &R, 3457 unsigned RelIndex, bool IsRela) { 3458 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 3459 this->dumper()->getRelocationTarget(SymTab, R); 3460 if (!Target) 3461 this->reportUniqueWarning(createError( 3462 "unable to print relocation " + Twine(RelIndex) + " in section " + 3463 Twine(SecIndex) + ": " + toString(Target.takeError()))); 3464 else 3465 printRelocation(Obj, /*Sym=*/Target->first, /*Name=*/Target->second, R, 3466 IsRela); 3467 } 3468 3469 template <class ELFT> 3470 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, const Elf_Sym *Sym, 3471 StringRef SymbolName, const Elf_Rela &R, 3472 bool IsRela) { 3473 // First two fields are bit width dependent. The rest of them are fixed width. 3474 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3475 Field Fields[5] = {0, 10 + Bias, 19 + 2 * Bias, 42 + 2 * Bias, 53 + 2 * Bias}; 3476 unsigned Width = ELFT::Is64Bits ? 16 : 8; 3477 3478 Fields[0].Str = to_string(format_hex_no_prefix(R.r_offset, Width)); 3479 Fields[1].Str = to_string(format_hex_no_prefix(R.r_info, Width)); 3480 3481 SmallString<32> RelocName; 3482 Obj->getRelocationTypeName(R.getType(Obj->isMips64EL()), RelocName); 3483 Fields[2].Str = RelocName.c_str(); 3484 3485 if (Sym && (!SymbolName.empty() || Sym->getValue() != 0)) 3486 Fields[3].Str = to_string(format_hex_no_prefix(Sym->getValue(), Width)); 3487 3488 Fields[4].Str = std::string(SymbolName); 3489 for (const Field &F : Fields) 3490 printField(F); 3491 3492 std::string Addend; 3493 if (IsRela) { 3494 int64_t RelAddend = R.r_addend; 3495 if (!SymbolName.empty()) { 3496 if (R.r_addend < 0) { 3497 Addend = " - "; 3498 RelAddend = std::abs(RelAddend); 3499 } else 3500 Addend = " + "; 3501 } 3502 3503 Addend += to_hexString(RelAddend, false); 3504 } 3505 OS << Addend << "\n"; 3506 } 3507 3508 template <class ELFT> void GNUStyle<ELFT>::printRelocHeader(unsigned SType) { 3509 bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA; 3510 bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR; 3511 if (ELFT::Is64Bits) 3512 OS << " "; 3513 else 3514 OS << " "; 3515 if (IsRelr && opts::RawRelr) 3516 OS << "Data "; 3517 else 3518 OS << "Offset"; 3519 if (ELFT::Is64Bits) 3520 OS << " Info Type" 3521 << " Symbol's Value Symbol's Name"; 3522 else 3523 OS << " Info Type Sym. Value Symbol's Name"; 3524 if (IsRela) 3525 OS << " + Addend"; 3526 OS << "\n"; 3527 } 3528 3529 template <class ELFT> void GNUStyle<ELFT>::printRelocations(const ELFO *Obj) { 3530 bool HasRelocSections = false; 3531 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 3532 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 3533 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 3534 Sec.sh_type != ELF::SHT_ANDROID_RELA && 3535 Sec.sh_type != ELF::SHT_ANDROID_RELR) 3536 continue; 3537 HasRelocSections = true; 3538 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 3539 unsigned Entries = Sec.getEntityCount(); 3540 std::vector<Elf_Rela> AndroidRelas; 3541 if (Sec.sh_type == ELF::SHT_ANDROID_REL || 3542 Sec.sh_type == ELF::SHT_ANDROID_RELA) { 3543 // Android's packed relocation section needs to be unpacked first 3544 // to get the actual number of entries. 3545 AndroidRelas = unwrapOrError(this->FileName, Obj->android_relas(&Sec)); 3546 Entries = AndroidRelas.size(); 3547 } 3548 std::vector<Elf_Rela> RelrRelas; 3549 if (!opts::RawRelr && (Sec.sh_type == ELF::SHT_RELR || 3550 Sec.sh_type == ELF::SHT_ANDROID_RELR)) { 3551 // .relr.dyn relative relocation section needs to be unpacked first 3552 // to get the actual number of entries. 3553 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(&Sec)); 3554 RelrRelas = unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 3555 Entries = RelrRelas.size(); 3556 } 3557 uintX_t Offset = Sec.sh_offset; 3558 OS << "\nRelocation section '" << Name << "' at offset 0x" 3559 << to_hexString(Offset, false) << " contains " << Entries 3560 << " entries:\n"; 3561 printRelocHeader(Sec.sh_type); 3562 const Elf_Shdr *SymTab = 3563 unwrapOrError(this->FileName, Obj->getSection(Sec.sh_link)); 3564 unsigned SecNdx = &Sec - &cantFail(Obj->sections()).front(); 3565 unsigned RelNdx = 0; 3566 3567 switch (Sec.sh_type) { 3568 case ELF::SHT_REL: 3569 for (const auto &R : unwrapOrError(this->FileName, Obj->rels(&Sec))) { 3570 Elf_Rela Rela; 3571 Rela.r_offset = R.r_offset; 3572 Rela.r_info = R.r_info; 3573 Rela.r_addend = 0; 3574 printRelocation(Obj, SecNdx, SymTab, Rela, ++RelNdx, false); 3575 } 3576 break; 3577 case ELF::SHT_RELA: 3578 for (const auto &R : unwrapOrError(this->FileName, Obj->relas(&Sec))) 3579 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, true); 3580 break; 3581 case ELF::SHT_RELR: 3582 case ELF::SHT_ANDROID_RELR: 3583 if (opts::RawRelr) 3584 for (const auto &R : unwrapOrError(this->FileName, Obj->relrs(&Sec))) 3585 OS << to_string(format_hex_no_prefix(R, ELFT::Is64Bits ? 16 : 8)) 3586 << "\n"; 3587 else 3588 for (const auto &R : RelrRelas) 3589 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, false); 3590 break; 3591 case ELF::SHT_ANDROID_REL: 3592 case ELF::SHT_ANDROID_RELA: 3593 for (const auto &R : AndroidRelas) 3594 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, 3595 Sec.sh_type == ELF::SHT_ANDROID_RELA); 3596 break; 3597 } 3598 } 3599 if (!HasRelocSections) 3600 OS << "\nThere are no relocations in this file.\n"; 3601 } 3602 3603 // Print the offset of a particular section from anyone of the ranges: 3604 // [SHT_LOOS, SHT_HIOS], [SHT_LOPROC, SHT_HIPROC], [SHT_LOUSER, SHT_HIUSER]. 3605 // If 'Type' does not fall within any of those ranges, then a string is 3606 // returned as '<unknown>' followed by the type value. 3607 static std::string getSectionTypeOffsetString(unsigned Type) { 3608 if (Type >= SHT_LOOS && Type <= SHT_HIOS) 3609 return "LOOS+0x" + to_hexString(Type - SHT_LOOS); 3610 else if (Type >= SHT_LOPROC && Type <= SHT_HIPROC) 3611 return "LOPROC+0x" + to_hexString(Type - SHT_LOPROC); 3612 else if (Type >= SHT_LOUSER && Type <= SHT_HIUSER) 3613 return "LOUSER+0x" + to_hexString(Type - SHT_LOUSER); 3614 return "0x" + to_hexString(Type) + ": <unknown>"; 3615 } 3616 3617 static std::string getSectionTypeString(unsigned Arch, unsigned Type) { 3618 using namespace ELF; 3619 3620 switch (Arch) { 3621 case EM_ARM: 3622 switch (Type) { 3623 case SHT_ARM_EXIDX: 3624 return "ARM_EXIDX"; 3625 case SHT_ARM_PREEMPTMAP: 3626 return "ARM_PREEMPTMAP"; 3627 case SHT_ARM_ATTRIBUTES: 3628 return "ARM_ATTRIBUTES"; 3629 case SHT_ARM_DEBUGOVERLAY: 3630 return "ARM_DEBUGOVERLAY"; 3631 case SHT_ARM_OVERLAYSECTION: 3632 return "ARM_OVERLAYSECTION"; 3633 } 3634 break; 3635 case EM_X86_64: 3636 switch (Type) { 3637 case SHT_X86_64_UNWIND: 3638 return "X86_64_UNWIND"; 3639 } 3640 break; 3641 case EM_MIPS: 3642 case EM_MIPS_RS3_LE: 3643 switch (Type) { 3644 case SHT_MIPS_REGINFO: 3645 return "MIPS_REGINFO"; 3646 case SHT_MIPS_OPTIONS: 3647 return "MIPS_OPTIONS"; 3648 case SHT_MIPS_DWARF: 3649 return "MIPS_DWARF"; 3650 case SHT_MIPS_ABIFLAGS: 3651 return "MIPS_ABIFLAGS"; 3652 } 3653 break; 3654 case EM_RISCV: 3655 switch (Type) { 3656 case SHT_RISCV_ATTRIBUTES: 3657 return "RISCV_ATTRIBUTES"; 3658 } 3659 } 3660 switch (Type) { 3661 case SHT_NULL: 3662 return "NULL"; 3663 case SHT_PROGBITS: 3664 return "PROGBITS"; 3665 case SHT_SYMTAB: 3666 return "SYMTAB"; 3667 case SHT_STRTAB: 3668 return "STRTAB"; 3669 case SHT_RELA: 3670 return "RELA"; 3671 case SHT_HASH: 3672 return "HASH"; 3673 case SHT_DYNAMIC: 3674 return "DYNAMIC"; 3675 case SHT_NOTE: 3676 return "NOTE"; 3677 case SHT_NOBITS: 3678 return "NOBITS"; 3679 case SHT_REL: 3680 return "REL"; 3681 case SHT_SHLIB: 3682 return "SHLIB"; 3683 case SHT_DYNSYM: 3684 return "DYNSYM"; 3685 case SHT_INIT_ARRAY: 3686 return "INIT_ARRAY"; 3687 case SHT_FINI_ARRAY: 3688 return "FINI_ARRAY"; 3689 case SHT_PREINIT_ARRAY: 3690 return "PREINIT_ARRAY"; 3691 case SHT_GROUP: 3692 return "GROUP"; 3693 case SHT_SYMTAB_SHNDX: 3694 return "SYMTAB SECTION INDICES"; 3695 case SHT_ANDROID_REL: 3696 return "ANDROID_REL"; 3697 case SHT_ANDROID_RELA: 3698 return "ANDROID_RELA"; 3699 case SHT_RELR: 3700 case SHT_ANDROID_RELR: 3701 return "RELR"; 3702 case SHT_LLVM_ODRTAB: 3703 return "LLVM_ODRTAB"; 3704 case SHT_LLVM_LINKER_OPTIONS: 3705 return "LLVM_LINKER_OPTIONS"; 3706 case SHT_LLVM_CALL_GRAPH_PROFILE: 3707 return "LLVM_CALL_GRAPH_PROFILE"; 3708 case SHT_LLVM_ADDRSIG: 3709 return "LLVM_ADDRSIG"; 3710 case SHT_LLVM_DEPENDENT_LIBRARIES: 3711 return "LLVM_DEPENDENT_LIBRARIES"; 3712 case SHT_LLVM_SYMPART: 3713 return "LLVM_SYMPART"; 3714 case SHT_LLVM_PART_EHDR: 3715 return "LLVM_PART_EHDR"; 3716 case SHT_LLVM_PART_PHDR: 3717 return "LLVM_PART_PHDR"; 3718 // FIXME: Parse processor specific GNU attributes 3719 case SHT_GNU_ATTRIBUTES: 3720 return "ATTRIBUTES"; 3721 case SHT_GNU_HASH: 3722 return "GNU_HASH"; 3723 case SHT_GNU_verdef: 3724 return "VERDEF"; 3725 case SHT_GNU_verneed: 3726 return "VERNEED"; 3727 case SHT_GNU_versym: 3728 return "VERSYM"; 3729 default: 3730 return getSectionTypeOffsetString(Type); 3731 } 3732 return ""; 3733 } 3734 3735 static void printSectionDescription(formatted_raw_ostream &OS, 3736 unsigned EMachine) { 3737 OS << "Key to Flags:\n"; 3738 OS << " W (write), A (alloc), X (execute), M (merge), S (strings), I " 3739 "(info),\n"; 3740 OS << " L (link order), O (extra OS processing required), G (group), T " 3741 "(TLS),\n"; 3742 OS << " C (compressed), x (unknown), o (OS specific), E (exclude),\n"; 3743 3744 if (EMachine == EM_X86_64) 3745 OS << " l (large), "; 3746 else if (EMachine == EM_ARM) 3747 OS << " y (purecode), "; 3748 else 3749 OS << " "; 3750 3751 OS << "p (processor specific)\n"; 3752 } 3753 3754 template <class ELFT> 3755 void GNUStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 3756 unsigned Bias = ELFT::Is64Bits ? 0 : 8; 3757 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 3758 OS << "There are " << to_string(Sections.size()) 3759 << " section headers, starting at offset " 3760 << "0x" << to_hexString(Obj->getHeader()->e_shoff, false) << ":\n\n"; 3761 OS << "Section Headers:\n"; 3762 Field Fields[11] = { 3763 {"[Nr]", 2}, {"Name", 7}, {"Type", 25}, 3764 {"Address", 41}, {"Off", 58 - Bias}, {"Size", 65 - Bias}, 3765 {"ES", 72 - Bias}, {"Flg", 75 - Bias}, {"Lk", 79 - Bias}, 3766 {"Inf", 82 - Bias}, {"Al", 86 - Bias}}; 3767 for (auto &F : Fields) 3768 printField(F); 3769 OS << "\n"; 3770 3771 const ELFObjectFile<ELFT> *ElfObj = this->dumper()->getElfObject(); 3772 StringRef SecStrTable = unwrapOrError<StringRef>( 3773 ElfObj->getFileName(), 3774 Obj->getSectionStringTable(Sections, this->dumper()->WarningHandler)); 3775 size_t SectionIndex = 0; 3776 for (const Elf_Shdr &Sec : Sections) { 3777 Fields[0].Str = to_string(SectionIndex); 3778 if (SecStrTable.empty()) 3779 Fields[1].Str = "<no-strings>"; 3780 else 3781 Fields[1].Str = std::string(unwrapOrError<StringRef>( 3782 ElfObj->getFileName(), Obj->getSectionName(&Sec, SecStrTable))); 3783 Fields[2].Str = 3784 getSectionTypeString(Obj->getHeader()->e_machine, Sec.sh_type); 3785 Fields[3].Str = 3786 to_string(format_hex_no_prefix(Sec.sh_addr, ELFT::Is64Bits ? 16 : 8)); 3787 Fields[4].Str = to_string(format_hex_no_prefix(Sec.sh_offset, 6)); 3788 Fields[5].Str = to_string(format_hex_no_prefix(Sec.sh_size, 6)); 3789 Fields[6].Str = to_string(format_hex_no_prefix(Sec.sh_entsize, 2)); 3790 Fields[7].Str = getGNUFlags(Obj->getHeader()->e_machine, Sec.sh_flags); 3791 Fields[8].Str = to_string(Sec.sh_link); 3792 Fields[9].Str = to_string(Sec.sh_info); 3793 Fields[10].Str = to_string(Sec.sh_addralign); 3794 3795 OS.PadToColumn(Fields[0].Column); 3796 OS << "[" << right_justify(Fields[0].Str, 2) << "]"; 3797 for (int i = 1; i < 7; i++) 3798 printField(Fields[i]); 3799 OS.PadToColumn(Fields[7].Column); 3800 OS << right_justify(Fields[7].Str, 3); 3801 OS.PadToColumn(Fields[8].Column); 3802 OS << right_justify(Fields[8].Str, 2); 3803 OS.PadToColumn(Fields[9].Column); 3804 OS << right_justify(Fields[9].Str, 3); 3805 OS.PadToColumn(Fields[10].Column); 3806 OS << right_justify(Fields[10].Str, 2); 3807 OS << "\n"; 3808 ++SectionIndex; 3809 } 3810 printSectionDescription(OS, Obj->getHeader()->e_machine); 3811 } 3812 3813 template <class ELFT> 3814 void GNUStyle<ELFT>::printSymtabMessage(const ELFO *Obj, StringRef Name, 3815 size_t Entries, 3816 bool NonVisibilityBitsUsed) { 3817 if (!Name.empty()) 3818 OS << "\nSymbol table '" << Name << "'"; 3819 else 3820 OS << "\nSymbol table for image"; 3821 OS << " contains " << Entries << " entries:\n"; 3822 3823 if (ELFT::Is64Bits) 3824 OS << " Num: Value Size Type Bind Vis"; 3825 else 3826 OS << " Num: Value Size Type Bind Vis"; 3827 3828 if (NonVisibilityBitsUsed) 3829 OS << " "; 3830 OS << " Ndx Name\n"; 3831 } 3832 3833 template <class ELFT> 3834 std::string GNUStyle<ELFT>::getSymbolSectionNdx(const ELFO *Obj, 3835 const Elf_Sym *Symbol, 3836 const Elf_Sym *FirstSym) { 3837 unsigned SectionIndex = Symbol->st_shndx; 3838 switch (SectionIndex) { 3839 case ELF::SHN_UNDEF: 3840 return "UND"; 3841 case ELF::SHN_ABS: 3842 return "ABS"; 3843 case ELF::SHN_COMMON: 3844 return "COM"; 3845 case ELF::SHN_XINDEX: { 3846 Expected<uint32_t> IndexOrErr = object::getExtendedSymbolTableIndex<ELFT>( 3847 Symbol, FirstSym, this->dumper()->getShndxTable()); 3848 if (!IndexOrErr) { 3849 assert(Symbol->st_shndx == SHN_XINDEX && 3850 "getSymbolSectionIndex should only fail due to an invalid " 3851 "SHT_SYMTAB_SHNDX table/reference"); 3852 this->reportUniqueWarning(IndexOrErr.takeError()); 3853 return "RSV[0xffff]"; 3854 } 3855 return to_string(format_decimal(*IndexOrErr, 3)); 3856 } 3857 default: 3858 // Find if: 3859 // Processor specific 3860 if (SectionIndex >= ELF::SHN_LOPROC && SectionIndex <= ELF::SHN_HIPROC) 3861 return std::string("PRC[0x") + 3862 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3863 // OS specific 3864 if (SectionIndex >= ELF::SHN_LOOS && SectionIndex <= ELF::SHN_HIOS) 3865 return std::string("OS[0x") + 3866 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3867 // Architecture reserved: 3868 if (SectionIndex >= ELF::SHN_LORESERVE && 3869 SectionIndex <= ELF::SHN_HIRESERVE) 3870 return std::string("RSV[0x") + 3871 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3872 // A normal section with an index 3873 return to_string(format_decimal(SectionIndex, 3)); 3874 } 3875 } 3876 3877 template <class ELFT> 3878 void GNUStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 3879 const Elf_Sym *FirstSym, StringRef StrTable, 3880 bool IsDynamic, bool NonVisibilityBitsUsed) { 3881 static int Idx = 0; 3882 static bool Dynamic = true; 3883 3884 // If this function was called with a different value from IsDynamic 3885 // from last call, happens when we move from dynamic to static symbol 3886 // table, "Num" field should be reset. 3887 if (!Dynamic != !IsDynamic) { 3888 Idx = 0; 3889 Dynamic = false; 3890 } 3891 3892 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3893 Field Fields[8] = {0, 8, 17 + Bias, 23 + Bias, 3894 31 + Bias, 38 + Bias, 48 + Bias, 51 + Bias}; 3895 Fields[0].Str = to_string(format_decimal(Idx++, 6)) + ":"; 3896 Fields[1].Str = to_string( 3897 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3898 Fields[2].Str = to_string(format_decimal(Symbol->st_size, 5)); 3899 3900 unsigned char SymbolType = Symbol->getType(); 3901 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3902 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3903 Fields[3].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3904 else 3905 Fields[3].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3906 3907 Fields[4].Str = 3908 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3909 Fields[5].Str = 3910 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3911 if (Symbol->st_other & ~0x3) 3912 Fields[5].Str += 3913 " [<other: " + to_string(format_hex(Symbol->st_other, 2)) + ">]"; 3914 3915 Fields[6].Column += NonVisibilityBitsUsed ? 13 : 0; 3916 Fields[6].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 3917 3918 Fields[7].Str = 3919 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 3920 for (auto &Entry : Fields) 3921 printField(Entry); 3922 OS << "\n"; 3923 } 3924 3925 template <class ELFT> 3926 void GNUStyle<ELFT>::printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, 3927 uint32_t Sym, StringRef StrTable, 3928 uint32_t Bucket) { 3929 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3930 Field Fields[9] = {0, 6, 11, 20 + Bias, 25 + Bias, 3931 34 + Bias, 41 + Bias, 49 + Bias, 53 + Bias}; 3932 Fields[0].Str = to_string(format_decimal(Sym, 5)); 3933 Fields[1].Str = to_string(format_decimal(Bucket, 3)) + ":"; 3934 3935 const auto Symbol = FirstSym + Sym; 3936 Fields[2].Str = to_string( 3937 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3938 Fields[3].Str = to_string(format_decimal(Symbol->st_size, 5)); 3939 3940 unsigned char SymbolType = Symbol->getType(); 3941 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3942 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3943 Fields[4].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3944 else 3945 Fields[4].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3946 3947 Fields[5].Str = 3948 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3949 Fields[6].Str = 3950 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3951 Fields[7].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 3952 Fields[8].Str = this->dumper()->getFullSymbolName(Symbol, StrTable, true); 3953 3954 for (auto &Entry : Fields) 3955 printField(Entry); 3956 OS << "\n"; 3957 } 3958 3959 template <class ELFT> 3960 void GNUStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 3961 bool PrintDynamicSymbols) { 3962 if (!PrintSymbols && !PrintDynamicSymbols) 3963 return; 3964 // GNU readelf prints both the .dynsym and .symtab with --symbols. 3965 this->dumper()->printSymbolsHelper(true); 3966 if (PrintSymbols) 3967 this->dumper()->printSymbolsHelper(false); 3968 } 3969 3970 template <class ELFT> void GNUStyle<ELFT>::printHashSymbols(const ELFO *Obj) { 3971 if (this->dumper()->getDynamicStringTable().empty()) 3972 return; 3973 auto StringTable = this->dumper()->getDynamicStringTable(); 3974 auto DynSyms = this->dumper()->dynamic_symbols(); 3975 3976 auto PrintHashTable = [&](const Elf_Hash *SysVHash) { 3977 if (ELFT::Is64Bits) 3978 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3979 else 3980 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3981 OS << "\n"; 3982 3983 auto Buckets = SysVHash->buckets(); 3984 auto Chains = SysVHash->chains(); 3985 for (uint32_t Buc = 0; Buc < SysVHash->nbucket; Buc++) { 3986 if (Buckets[Buc] == ELF::STN_UNDEF) 3987 continue; 3988 std::vector<bool> Visited(SysVHash->nchain); 3989 for (uint32_t Ch = Buckets[Buc]; Ch < SysVHash->nchain; Ch = Chains[Ch]) { 3990 if (Ch == ELF::STN_UNDEF) 3991 break; 3992 3993 if (Visited[Ch]) { 3994 reportWarning( 3995 createError(".hash section is invalid: bucket " + Twine(Ch) + 3996 ": a cycle was detected in the linked chain"), 3997 this->FileName); 3998 break; 3999 } 4000 4001 printHashedSymbol(Obj, &DynSyms[0], Ch, StringTable, Buc); 4002 Visited[Ch] = true; 4003 } 4004 } 4005 }; 4006 4007 if (const Elf_Hash *SysVHash = this->dumper()->getHashTable()) { 4008 OS << "\n Symbol table of .hash for image:\n"; 4009 if (checkHashTable(Obj, SysVHash, this->FileName)) 4010 PrintHashTable(SysVHash); 4011 } 4012 4013 // Try printing .gnu.hash 4014 if (auto GnuHash = this->dumper()->getGnuHashTable()) { 4015 OS << "\n Symbol table of .gnu.hash for image:\n"; 4016 if (ELFT::Is64Bits) 4017 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4018 else 4019 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4020 OS << "\n"; 4021 auto Buckets = GnuHash->buckets(); 4022 for (uint32_t Buc = 0; Buc < GnuHash->nbuckets; Buc++) { 4023 if (Buckets[Buc] == ELF::STN_UNDEF) 4024 continue; 4025 uint32_t Index = Buckets[Buc]; 4026 uint32_t GnuHashable = Index - GnuHash->symndx; 4027 // Print whole chain 4028 while (true) { 4029 printHashedSymbol(Obj, &DynSyms[0], Index++, StringTable, Buc); 4030 // Chain ends at symbol with stopper bit 4031 if ((GnuHash->values(DynSyms.size())[GnuHashable++] & 1) == 1) 4032 break; 4033 } 4034 } 4035 } 4036 } 4037 4038 static inline std::string printPhdrFlags(unsigned Flag) { 4039 std::string Str; 4040 Str = (Flag & PF_R) ? "R" : " "; 4041 Str += (Flag & PF_W) ? "W" : " "; 4042 Str += (Flag & PF_X) ? "E" : " "; 4043 return Str; 4044 } 4045 4046 template <class ELFT> 4047 static bool checkTLSSections(const typename ELFT::Phdr &Phdr, 4048 const typename ELFT::Shdr &Sec) { 4049 if (Sec.sh_flags & ELF::SHF_TLS) { 4050 // .tbss must only be shown in the PT_TLS segment. 4051 if (Sec.sh_type == ELF::SHT_NOBITS) 4052 return Phdr.p_type == ELF::PT_TLS; 4053 4054 // SHF_TLS sections are only shown in PT_TLS, PT_LOAD or PT_GNU_RELRO 4055 // segments. 4056 return (Phdr.p_type == ELF::PT_TLS) || (Phdr.p_type == ELF::PT_LOAD) || 4057 (Phdr.p_type == ELF::PT_GNU_RELRO); 4058 } 4059 4060 // PT_TLS must only have SHF_TLS sections. 4061 return Phdr.p_type != ELF::PT_TLS; 4062 } 4063 4064 template <class ELFT> 4065 static bool checkOffsets(const typename ELFT::Phdr &Phdr, 4066 const typename ELFT::Shdr &Sec) { 4067 // SHT_NOBITS sections don't need to have an offset inside the segment. 4068 if (Sec.sh_type == ELF::SHT_NOBITS) 4069 return true; 4070 4071 if (Sec.sh_offset < Phdr.p_offset) 4072 return false; 4073 4074 // Only non-empty sections can be at the end of a segment. 4075 if (Sec.sh_size == 0) 4076 return (Sec.sh_offset + 1 <= Phdr.p_offset + Phdr.p_filesz); 4077 return Sec.sh_offset + Sec.sh_size <= Phdr.p_offset + Phdr.p_filesz; 4078 } 4079 4080 // Check that an allocatable section belongs to a virtual address 4081 // space of a segment. 4082 template <class ELFT> 4083 static bool checkVMA(const typename ELFT::Phdr &Phdr, 4084 const typename ELFT::Shdr &Sec) { 4085 if (!(Sec.sh_flags & ELF::SHF_ALLOC)) 4086 return true; 4087 4088 if (Sec.sh_addr < Phdr.p_vaddr) 4089 return false; 4090 4091 bool IsTbss = 4092 (Sec.sh_type == ELF::SHT_NOBITS) && ((Sec.sh_flags & ELF::SHF_TLS) != 0); 4093 // .tbss is special, it only has memory in PT_TLS and has NOBITS properties. 4094 bool IsTbssInNonTLS = IsTbss && Phdr.p_type != ELF::PT_TLS; 4095 // Only non-empty sections can be at the end of a segment. 4096 if (Sec.sh_size == 0 || IsTbssInNonTLS) 4097 return Sec.sh_addr + 1 <= Phdr.p_vaddr + Phdr.p_memsz; 4098 return Sec.sh_addr + Sec.sh_size <= Phdr.p_vaddr + Phdr.p_memsz; 4099 } 4100 4101 template <class ELFT> 4102 static bool checkPTDynamic(const typename ELFT::Phdr &Phdr, 4103 const typename ELFT::Shdr &Sec) { 4104 if (Phdr.p_type != ELF::PT_DYNAMIC || Phdr.p_memsz == 0 || Sec.sh_size != 0) 4105 return true; 4106 4107 // We get here when we have an empty section. Only non-empty sections can be 4108 // at the start or at the end of PT_DYNAMIC. 4109 // Is section within the phdr both based on offset and VMA? 4110 bool CheckOffset = (Sec.sh_type == ELF::SHT_NOBITS) || 4111 (Sec.sh_offset > Phdr.p_offset && 4112 Sec.sh_offset < Phdr.p_offset + Phdr.p_filesz); 4113 bool CheckVA = !(Sec.sh_flags & ELF::SHF_ALLOC) || 4114 (Sec.sh_addr > Phdr.p_vaddr && Sec.sh_addr < Phdr.p_memsz); 4115 return CheckOffset && CheckVA; 4116 } 4117 4118 template <class ELFT> 4119 void GNUStyle<ELFT>::printProgramHeaders( 4120 const ELFO *Obj, bool PrintProgramHeaders, 4121 cl::boolOrDefault PrintSectionMapping) { 4122 if (PrintProgramHeaders) 4123 printProgramHeaders(Obj); 4124 4125 // Display the section mapping along with the program headers, unless 4126 // -section-mapping is explicitly set to false. 4127 if (PrintSectionMapping != cl::BOU_FALSE) 4128 printSectionMapping(Obj); 4129 } 4130 4131 template <class ELFT> 4132 void GNUStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 4133 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 4134 const Elf_Ehdr *Header = Obj->getHeader(); 4135 Field Fields[8] = {2, 17, 26, 37 + Bias, 4136 48 + Bias, 56 + Bias, 64 + Bias, 68 + Bias}; 4137 OS << "\nElf file type is " 4138 << printEnum(Header->e_type, makeArrayRef(ElfObjectFileType)) << "\n" 4139 << "Entry point " << format_hex(Header->e_entry, 3) << "\n" 4140 << "There are " << Header->e_phnum << " program headers," 4141 << " starting at offset " << Header->e_phoff << "\n\n" 4142 << "Program Headers:\n"; 4143 if (ELFT::Is64Bits) 4144 OS << " Type Offset VirtAddr PhysAddr " 4145 << " FileSiz MemSiz Flg Align\n"; 4146 else 4147 OS << " Type Offset VirtAddr PhysAddr FileSiz " 4148 << "MemSiz Flg Align\n"; 4149 4150 unsigned Width = ELFT::Is64Bits ? 18 : 10; 4151 unsigned SizeWidth = ELFT::Is64Bits ? 8 : 7; 4152 for (const auto &Phdr : 4153 unwrapOrError(this->FileName, Obj->program_headers())) { 4154 Fields[0].Str = getElfPtType(Header->e_machine, Phdr.p_type); 4155 Fields[1].Str = to_string(format_hex(Phdr.p_offset, 8)); 4156 Fields[2].Str = to_string(format_hex(Phdr.p_vaddr, Width)); 4157 Fields[3].Str = to_string(format_hex(Phdr.p_paddr, Width)); 4158 Fields[4].Str = to_string(format_hex(Phdr.p_filesz, SizeWidth)); 4159 Fields[5].Str = to_string(format_hex(Phdr.p_memsz, SizeWidth)); 4160 Fields[6].Str = printPhdrFlags(Phdr.p_flags); 4161 Fields[7].Str = to_string(format_hex(Phdr.p_align, 1)); 4162 for (auto Field : Fields) 4163 printField(Field); 4164 if (Phdr.p_type == ELF::PT_INTERP) { 4165 OS << "\n"; 4166 auto ReportBadInterp = [&](const Twine &Msg) { 4167 reportWarning( 4168 createError("unable to read program interpreter name at offset 0x" + 4169 Twine::utohexstr(Phdr.p_offset) + ": " + Msg), 4170 this->FileName); 4171 }; 4172 4173 if (Phdr.p_offset >= Obj->getBufSize()) { 4174 ReportBadInterp("it goes past the end of the file (0x" + 4175 Twine::utohexstr(Obj->getBufSize()) + ")"); 4176 continue; 4177 } 4178 4179 const char *Data = 4180 reinterpret_cast<const char *>(Obj->base()) + Phdr.p_offset; 4181 size_t MaxSize = Obj->getBufSize() - Phdr.p_offset; 4182 size_t Len = strnlen(Data, MaxSize); 4183 if (Len == MaxSize) { 4184 ReportBadInterp("it is not null-terminated"); 4185 continue; 4186 } 4187 4188 OS << " [Requesting program interpreter: "; 4189 OS << StringRef(Data, Len) << "]"; 4190 } 4191 OS << "\n"; 4192 } 4193 } 4194 4195 template <class ELFT> 4196 void GNUStyle<ELFT>::printSectionMapping(const ELFO *Obj) { 4197 OS << "\n Section to Segment mapping:\n Segment Sections...\n"; 4198 DenseSet<const Elf_Shdr *> BelongsToSegment; 4199 int Phnum = 0; 4200 for (const Elf_Phdr &Phdr : 4201 unwrapOrError(this->FileName, Obj->program_headers())) { 4202 std::string Sections; 4203 OS << format(" %2.2d ", Phnum++); 4204 // Check if each section is in a segment and then print mapping. 4205 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4206 if (Sec.sh_type == ELF::SHT_NULL) 4207 continue; 4208 4209 // readelf additionally makes sure it does not print zero sized sections 4210 // at end of segments and for PT_DYNAMIC both start and end of section 4211 // .tbss must only be shown in PT_TLS section. 4212 if (checkTLSSections<ELFT>(Phdr, Sec) && checkOffsets<ELFT>(Phdr, Sec) && 4213 checkVMA<ELFT>(Phdr, Sec) && checkPTDynamic<ELFT>(Phdr, Sec)) { 4214 Sections += 4215 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + 4216 " "; 4217 BelongsToSegment.insert(&Sec); 4218 } 4219 } 4220 OS << Sections << "\n"; 4221 OS.flush(); 4222 } 4223 4224 // Display sections that do not belong to a segment. 4225 std::string Sections; 4226 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4227 if (BelongsToSegment.find(&Sec) == BelongsToSegment.end()) 4228 Sections += 4229 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + ' '; 4230 } 4231 if (!Sections.empty()) { 4232 OS << " None " << Sections << '\n'; 4233 OS.flush(); 4234 } 4235 } 4236 4237 namespace { 4238 template <class ELFT> struct RelSymbol { 4239 const typename ELFT::Sym *Sym; 4240 std::string Name; 4241 }; 4242 4243 template <class ELFT> 4244 RelSymbol<ELFT> getSymbolForReloc(const ELFFile<ELFT> *Obj, StringRef FileName, 4245 const ELFDumper<ELFT> *Dumper, 4246 const typename ELFT::Rela &Reloc) { 4247 uint32_t SymIndex = Reloc.getSymbol(Obj->isMips64EL()); 4248 auto WarnAndReturn = [&](const typename ELFT::Sym *Sym, 4249 const Twine &Reason) -> RelSymbol<ELFT> { 4250 reportWarning( 4251 createError("unable to get name of the dynamic symbol with index " + 4252 Twine(SymIndex) + ": " + Reason), 4253 FileName); 4254 return {Sym, "<corrupt>"}; 4255 }; 4256 4257 ArrayRef<typename ELFT::Sym> Symbols = Dumper->dynamic_symbols(); 4258 const typename ELFT::Sym *FirstSym = Symbols.begin(); 4259 if (!FirstSym) 4260 return WarnAndReturn(nullptr, "no dynamic symbol table found"); 4261 4262 // We might have an object without a section header. In this case the size of 4263 // Symbols is zero, because there is no way to know the size of the dynamic 4264 // table. We should allow this case and not print a warning. 4265 if (!Symbols.empty() && SymIndex >= Symbols.size()) 4266 return WarnAndReturn( 4267 nullptr, 4268 "index is greater than or equal to the number of dynamic symbols (" + 4269 Twine(Symbols.size()) + ")"); 4270 4271 const typename ELFT::Sym *Sym = FirstSym + SymIndex; 4272 Expected<StringRef> ErrOrName = Sym->getName(Dumper->getDynamicStringTable()); 4273 if (!ErrOrName) 4274 return WarnAndReturn(Sym, toString(ErrOrName.takeError())); 4275 4276 return {Sym, maybeDemangle(*ErrOrName)}; 4277 } 4278 } // namespace 4279 4280 template <class ELFT> 4281 void GNUStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela R, 4282 bool IsRela) { 4283 RelSymbol<ELFT> S = getSymbolForReloc(Obj, this->FileName, this->dumper(), R); 4284 printRelocation(Obj, S.Sym, S.Name, R, IsRela); 4285 } 4286 4287 template <class ELFT> 4288 static size_t getMaxDynamicTagSize(const ELFFile<ELFT> *Obj, 4289 typename ELFT::DynRange Tags) { 4290 size_t Max = 0; 4291 for (const typename ELFT::Dyn &Dyn : Tags) 4292 Max = std::max(Max, Obj->getDynamicTagAsString(Dyn.d_tag).size()); 4293 return Max; 4294 } 4295 4296 template <class ELFT> void GNUStyle<ELFT>::printDynamic(const ELFO *Obj) { 4297 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 4298 if (Table.empty()) 4299 return; 4300 4301 const DynRegionInfo &DynamicTableRegion = 4302 this->dumper()->getDynamicTableRegion(); 4303 4304 OS << "Dynamic section at offset " 4305 << format_hex(reinterpret_cast<const uint8_t *>(DynamicTableRegion.Addr) - 4306 Obj->base(), 4307 1) 4308 << " contains " << Table.size() << " entries:\n"; 4309 4310 // The type name is surrounded with round brackets, hence add 2. 4311 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table) + 2; 4312 // The "Name/Value" column should be indented from the "Type" column by N 4313 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 4314 // space (1) = 3. 4315 OS << " Tag" + std::string(ELFT::Is64Bits ? 16 : 8, ' ') + "Type" 4316 << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 4317 4318 std::string ValueFmt = " %-" + std::to_string(MaxTagSize) + "s "; 4319 for (auto Entry : Table) { 4320 uintX_t Tag = Entry.getTag(); 4321 std::string Type = 4322 std::string("(") + Obj->getDynamicTagAsString(Tag).c_str() + ")"; 4323 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 4324 OS << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10) 4325 << format(ValueFmt.c_str(), Type.c_str()) << Value << "\n"; 4326 } 4327 } 4328 4329 template <class ELFT> 4330 void GNUStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 4331 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 4332 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 4333 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 4334 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 4335 if (DynRelaRegion.Size > 0) { 4336 OS << "\n'RELA' relocation section at offset " 4337 << format_hex(reinterpret_cast<const uint8_t *>(DynRelaRegion.Addr) - 4338 Obj->base(), 4339 1) 4340 << " contains " << DynRelaRegion.Size << " bytes:\n"; 4341 printRelocHeader(ELF::SHT_RELA); 4342 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 4343 printDynamicRelocation(Obj, Rela, true); 4344 } 4345 if (DynRelRegion.Size > 0) { 4346 OS << "\n'REL' relocation section at offset " 4347 << format_hex(reinterpret_cast<const uint8_t *>(DynRelRegion.Addr) - 4348 Obj->base(), 4349 1) 4350 << " contains " << DynRelRegion.Size << " bytes:\n"; 4351 printRelocHeader(ELF::SHT_REL); 4352 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 4353 Elf_Rela Rela; 4354 Rela.r_offset = Rel.r_offset; 4355 Rela.r_info = Rel.r_info; 4356 Rela.r_addend = 0; 4357 printDynamicRelocation(Obj, Rela, false); 4358 } 4359 } 4360 if (DynRelrRegion.Size > 0) { 4361 OS << "\n'RELR' relocation section at offset " 4362 << format_hex(reinterpret_cast<const uint8_t *>(DynRelrRegion.Addr) - 4363 Obj->base(), 4364 1) 4365 << " contains " << DynRelrRegion.Size << " bytes:\n"; 4366 printRelocHeader(ELF::SHT_REL); 4367 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 4368 std::vector<Elf_Rela> RelrRelas = 4369 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 4370 for (const Elf_Rela &Rela : RelrRelas) { 4371 printDynamicRelocation(Obj, Rela, false); 4372 } 4373 } 4374 if (DynPLTRelRegion.Size) { 4375 OS << "\n'PLT' relocation section at offset " 4376 << format_hex(reinterpret_cast<const uint8_t *>(DynPLTRelRegion.Addr) - 4377 Obj->base(), 4378 1) 4379 << " contains " << DynPLTRelRegion.Size << " bytes:\n"; 4380 } 4381 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) { 4382 printRelocHeader(ELF::SHT_RELA); 4383 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 4384 printDynamicRelocation(Obj, Rela, true); 4385 } else { 4386 printRelocHeader(ELF::SHT_REL); 4387 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 4388 Elf_Rela Rela; 4389 Rela.r_offset = Rel.r_offset; 4390 Rela.r_info = Rel.r_info; 4391 Rela.r_addend = 0; 4392 printDynamicRelocation(Obj, Rela, false); 4393 } 4394 } 4395 } 4396 4397 template <class ELFT> 4398 void GNUStyle<ELFT>::printGNUVersionSectionProlog( 4399 const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec, 4400 const Twine &Label, unsigned EntriesNum) { 4401 StringRef SecName = unwrapOrError(this->FileName, Obj->getSectionName(Sec)); 4402 OS << Label << " section '" << SecName << "' " 4403 << "contains " << EntriesNum << " entries:\n"; 4404 4405 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4406 StringRef SymTabName = "<corrupt>"; 4407 4408 Expected<const typename ELFT::Shdr *> SymTabOrErr = 4409 Obj->getSection(Sec->sh_link); 4410 if (SymTabOrErr) 4411 SymTabName = 4412 unwrapOrError(this->FileName, Obj->getSectionName(*SymTabOrErr)); 4413 else 4414 this->reportUniqueWarning( 4415 createError("invalid section linked to " + 4416 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 4417 Sec->sh_type) + 4418 " section with index " + Twine(SecNdx) + ": " + 4419 toString(SymTabOrErr.takeError()))); 4420 4421 OS << " Addr: " << format_hex_no_prefix(Sec->sh_addr, 16) 4422 << " Offset: " << format_hex(Sec->sh_offset, 8) 4423 << " Link: " << Sec->sh_link << " (" << SymTabName << ")\n"; 4424 } 4425 4426 template <class ELFT> 4427 void GNUStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 4428 const Elf_Shdr *Sec) { 4429 if (!Sec) 4430 return; 4431 4432 printGNUVersionSectionProlog(Obj, Sec, "Version symbols", 4433 Sec->sh_size / sizeof(Elf_Versym)); 4434 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 4435 this->dumper()->getVersionTable(Sec, /*SymTab=*/nullptr, 4436 /*StrTab=*/nullptr); 4437 if (!VerTableOrErr) { 4438 this->reportUniqueWarning(VerTableOrErr.takeError()); 4439 return; 4440 } 4441 4442 ArrayRef<Elf_Versym> VerTable = *VerTableOrErr; 4443 std::vector<StringRef> Versions; 4444 for (size_t I = 0, E = VerTable.size(); I < E; ++I) { 4445 unsigned Ndx = VerTable[I].vs_index; 4446 if (Ndx == VER_NDX_LOCAL || Ndx == VER_NDX_GLOBAL) { 4447 Versions.emplace_back(Ndx == VER_NDX_LOCAL ? "*local*" : "*global*"); 4448 continue; 4449 } 4450 4451 bool IsDefault; 4452 Expected<StringRef> NameOrErr = 4453 this->dumper()->getSymbolVersionByIndex(Ndx, IsDefault); 4454 if (!NameOrErr) { 4455 if (!NameOrErr) { 4456 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4457 this->reportUniqueWarning(createError( 4458 "unable to get a version for entry " + Twine(I) + 4459 " of SHT_GNU_versym section with index " + Twine(SecNdx) + ": " + 4460 toString(NameOrErr.takeError()))); 4461 } 4462 Versions.emplace_back("<corrupt>"); 4463 continue; 4464 } 4465 Versions.emplace_back(*NameOrErr); 4466 } 4467 4468 // readelf prints 4 entries per line. 4469 uint64_t Entries = VerTable.size(); 4470 for (uint64_t VersymRow = 0; VersymRow < Entries; VersymRow += 4) { 4471 OS << " " << format_hex_no_prefix(VersymRow, 3) << ":"; 4472 for (uint64_t I = 0; (I < 4) && (I + VersymRow) < Entries; ++I) { 4473 unsigned Ndx = VerTable[VersymRow + I].vs_index; 4474 OS << format("%4x%c", Ndx & VERSYM_VERSION, 4475 Ndx & VERSYM_HIDDEN ? 'h' : ' '); 4476 OS << left_justify("(" + std::string(Versions[VersymRow + I]) + ")", 13); 4477 } 4478 OS << '\n'; 4479 } 4480 OS << '\n'; 4481 } 4482 4483 static std::string versionFlagToString(unsigned Flags) { 4484 if (Flags == 0) 4485 return "none"; 4486 4487 std::string Ret; 4488 auto AddFlag = [&Ret, &Flags](unsigned Flag, StringRef Name) { 4489 if (!(Flags & Flag)) 4490 return; 4491 if (!Ret.empty()) 4492 Ret += " | "; 4493 Ret += Name; 4494 Flags &= ~Flag; 4495 }; 4496 4497 AddFlag(VER_FLG_BASE, "BASE"); 4498 AddFlag(VER_FLG_WEAK, "WEAK"); 4499 AddFlag(VER_FLG_INFO, "INFO"); 4500 AddFlag(~0, "<unknown>"); 4501 return Ret; 4502 } 4503 4504 template <class ELFT> 4505 void GNUStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 4506 const Elf_Shdr *Sec) { 4507 if (!Sec) 4508 return; 4509 4510 printGNUVersionSectionProlog(Obj, Sec, "Version definition", Sec->sh_info); 4511 4512 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 4513 if (!V) { 4514 this->reportUniqueWarning(V.takeError()); 4515 return; 4516 } 4517 4518 for (const VerDef &Def : *V) { 4519 OS << format(" 0x%04x: Rev: %u Flags: %s Index: %u Cnt: %u Name: %s\n", 4520 Def.Offset, Def.Version, 4521 versionFlagToString(Def.Flags).c_str(), Def.Ndx, Def.Cnt, 4522 Def.Name.data()); 4523 unsigned I = 0; 4524 for (const VerdAux &Aux : Def.AuxV) 4525 OS << format(" 0x%04x: Parent %u: %s\n", Aux.Offset, ++I, 4526 Aux.Name.data()); 4527 } 4528 4529 OS << '\n'; 4530 } 4531 4532 template <class ELFT> 4533 void GNUStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 4534 const Elf_Shdr *Sec) { 4535 if (!Sec) 4536 return; 4537 4538 unsigned VerneedNum = Sec->sh_info; 4539 printGNUVersionSectionProlog(Obj, Sec, "Version needs", VerneedNum); 4540 4541 Expected<std::vector<VerNeed>> V = 4542 this->dumper()->getVersionDependencies(Sec); 4543 if (!V) { 4544 this->reportUniqueWarning(V.takeError()); 4545 return; 4546 } 4547 4548 for (const VerNeed &VN : *V) { 4549 OS << format(" 0x%04x: Version: %u File: %s Cnt: %u\n", VN.Offset, 4550 VN.Version, VN.File.data(), VN.Cnt); 4551 for (const VernAux &Aux : VN.AuxV) 4552 OS << format(" 0x%04x: Name: %s Flags: %s Version: %u\n", Aux.Offset, 4553 Aux.Name.data(), versionFlagToString(Aux.Flags).c_str(), 4554 Aux.Other); 4555 } 4556 OS << '\n'; 4557 } 4558 4559 // Hash histogram shows statistics of how efficient the hash was for the 4560 // dynamic symbol table. The table shows number of hash buckets for different 4561 // lengths of chains as absolute number and percentage of the total buckets. 4562 // Additionally cumulative coverage of symbols for each set of buckets. 4563 template <class ELFT> 4564 void GNUStyle<ELFT>::printHashHistogram(const ELFFile<ELFT> *Obj) { 4565 // Print histogram for .hash section 4566 if (const Elf_Hash *HashTable = this->dumper()->getHashTable()) { 4567 if (!checkHashTable(Obj, HashTable, this->FileName)) 4568 return; 4569 4570 size_t NBucket = HashTable->nbucket; 4571 size_t NChain = HashTable->nchain; 4572 ArrayRef<Elf_Word> Buckets = HashTable->buckets(); 4573 ArrayRef<Elf_Word> Chains = HashTable->chains(); 4574 size_t TotalSyms = 0; 4575 // If hash table is correct, we have at least chains with 0 length 4576 size_t MaxChain = 1; 4577 size_t CumulativeNonZero = 0; 4578 4579 if (NChain == 0 || NBucket == 0) 4580 return; 4581 4582 std::vector<size_t> ChainLen(NBucket, 0); 4583 // Go over all buckets and and note chain lengths of each bucket (total 4584 // unique chain lengths). 4585 for (size_t B = 0; B < NBucket; B++) { 4586 std::vector<bool> Visited(NChain); 4587 for (size_t C = Buckets[B]; C < NChain; C = Chains[C]) { 4588 if (C == ELF::STN_UNDEF) 4589 break; 4590 if (Visited[C]) { 4591 reportWarning( 4592 createError(".hash section is invalid: bucket " + Twine(C) + 4593 ": a cycle was detected in the linked chain"), 4594 this->FileName); 4595 break; 4596 } 4597 Visited[C] = true; 4598 if (MaxChain <= ++ChainLen[B]) 4599 MaxChain++; 4600 } 4601 TotalSyms += ChainLen[B]; 4602 } 4603 4604 if (!TotalSyms) 4605 return; 4606 4607 std::vector<size_t> Count(MaxChain, 0) ; 4608 // Count how long is the chain for each bucket 4609 for (size_t B = 0; B < NBucket; B++) 4610 ++Count[ChainLen[B]]; 4611 // Print Number of buckets with each chain lengths and their cumulative 4612 // coverage of the symbols 4613 OS << "Histogram for bucket list length (total of " << NBucket 4614 << " buckets)\n" 4615 << " Length Number % of total Coverage\n"; 4616 for (size_t I = 0; I < MaxChain; I++) { 4617 CumulativeNonZero += Count[I] * I; 4618 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4619 (Count[I] * 100.0) / NBucket, 4620 (CumulativeNonZero * 100.0) / TotalSyms); 4621 } 4622 } 4623 4624 // Print histogram for .gnu.hash section 4625 if (const Elf_GnuHash *GnuHashTable = this->dumper()->getGnuHashTable()) { 4626 size_t NBucket = GnuHashTable->nbuckets; 4627 ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets(); 4628 unsigned NumSyms = this->dumper()->dynamic_symbols().size(); 4629 if (!NumSyms) 4630 return; 4631 ArrayRef<Elf_Word> Chains = GnuHashTable->values(NumSyms); 4632 size_t Symndx = GnuHashTable->symndx; 4633 size_t TotalSyms = 0; 4634 size_t MaxChain = 1; 4635 size_t CumulativeNonZero = 0; 4636 4637 if (Chains.empty() || NBucket == 0) 4638 return; 4639 4640 std::vector<size_t> ChainLen(NBucket, 0); 4641 4642 for (size_t B = 0; B < NBucket; B++) { 4643 if (!Buckets[B]) 4644 continue; 4645 size_t Len = 1; 4646 for (size_t C = Buckets[B] - Symndx; 4647 C < Chains.size() && (Chains[C] & 1) == 0; C++) 4648 if (MaxChain < ++Len) 4649 MaxChain++; 4650 ChainLen[B] = Len; 4651 TotalSyms += Len; 4652 } 4653 MaxChain++; 4654 4655 if (!TotalSyms) 4656 return; 4657 4658 std::vector<size_t> Count(MaxChain, 0) ; 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 `.gnu.hash' 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 4675 template <class ELFT> 4676 void GNUStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 4677 OS << "GNUStyle::printCGProfile not implemented\n"; 4678 } 4679 4680 template <class ELFT> 4681 void GNUStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 4682 reportError(createError("--addrsig: not implemented"), this->FileName); 4683 } 4684 4685 static StringRef getGenericNoteTypeName(const uint32_t NT) { 4686 static const struct { 4687 uint32_t ID; 4688 const char *Name; 4689 } Notes[] = { 4690 {ELF::NT_VERSION, "NT_VERSION (version)"}, 4691 {ELF::NT_ARCH, "NT_ARCH (architecture)"}, 4692 {ELF::NT_GNU_BUILD_ATTRIBUTE_OPEN, "OPEN"}, 4693 {ELF::NT_GNU_BUILD_ATTRIBUTE_FUNC, "func"}, 4694 }; 4695 4696 for (const auto &Note : Notes) 4697 if (Note.ID == NT) 4698 return Note.Name; 4699 4700 return ""; 4701 } 4702 4703 static StringRef getCoreNoteTypeName(const uint32_t NT) { 4704 static const struct { 4705 uint32_t ID; 4706 const char *Name; 4707 } Notes[] = { 4708 {ELF::NT_PRSTATUS, "NT_PRSTATUS (prstatus structure)"}, 4709 {ELF::NT_FPREGSET, "NT_FPREGSET (floating point registers)"}, 4710 {ELF::NT_PRPSINFO, "NT_PRPSINFO (prpsinfo structure)"}, 4711 {ELF::NT_TASKSTRUCT, "NT_TASKSTRUCT (task structure)"}, 4712 {ELF::NT_AUXV, "NT_AUXV (auxiliary vector)"}, 4713 {ELF::NT_PSTATUS, "NT_PSTATUS (pstatus structure)"}, 4714 {ELF::NT_FPREGS, "NT_FPREGS (floating point registers)"}, 4715 {ELF::NT_PSINFO, "NT_PSINFO (psinfo structure)"}, 4716 {ELF::NT_LWPSTATUS, "NT_LWPSTATUS (lwpstatus_t structure)"}, 4717 {ELF::NT_LWPSINFO, "NT_LWPSINFO (lwpsinfo_t structure)"}, 4718 {ELF::NT_WIN32PSTATUS, "NT_WIN32PSTATUS (win32_pstatus structure)"}, 4719 4720 {ELF::NT_PPC_VMX, "NT_PPC_VMX (ppc Altivec registers)"}, 4721 {ELF::NT_PPC_VSX, "NT_PPC_VSX (ppc VSX registers)"}, 4722 {ELF::NT_PPC_TAR, "NT_PPC_TAR (ppc TAR register)"}, 4723 {ELF::NT_PPC_PPR, "NT_PPC_PPR (ppc PPR register)"}, 4724 {ELF::NT_PPC_DSCR, "NT_PPC_DSCR (ppc DSCR register)"}, 4725 {ELF::NT_PPC_EBB, "NT_PPC_EBB (ppc EBB registers)"}, 4726 {ELF::NT_PPC_PMU, "NT_PPC_PMU (ppc PMU registers)"}, 4727 {ELF::NT_PPC_TM_CGPR, "NT_PPC_TM_CGPR (ppc checkpointed GPR registers)"}, 4728 {ELF::NT_PPC_TM_CFPR, 4729 "NT_PPC_TM_CFPR (ppc checkpointed floating point registers)"}, 4730 {ELF::NT_PPC_TM_CVMX, 4731 "NT_PPC_TM_CVMX (ppc checkpointed Altivec registers)"}, 4732 {ELF::NT_PPC_TM_CVSX, "NT_PPC_TM_CVSX (ppc checkpointed VSX registers)"}, 4733 {ELF::NT_PPC_TM_SPR, "NT_PPC_TM_SPR (ppc TM special purpose registers)"}, 4734 {ELF::NT_PPC_TM_CTAR, "NT_PPC_TM_CTAR (ppc checkpointed TAR register)"}, 4735 {ELF::NT_PPC_TM_CPPR, "NT_PPC_TM_CPPR (ppc checkpointed PPR register)"}, 4736 {ELF::NT_PPC_TM_CDSCR, 4737 "NT_PPC_TM_CDSCR (ppc checkpointed DSCR register)"}, 4738 4739 {ELF::NT_386_TLS, "NT_386_TLS (x86 TLS information)"}, 4740 {ELF::NT_386_IOPERM, "NT_386_IOPERM (x86 I/O permissions)"}, 4741 {ELF::NT_X86_XSTATE, "NT_X86_XSTATE (x86 XSAVE extended state)"}, 4742 4743 {ELF::NT_S390_HIGH_GPRS, 4744 "NT_S390_HIGH_GPRS (s390 upper register halves)"}, 4745 {ELF::NT_S390_TIMER, "NT_S390_TIMER (s390 timer register)"}, 4746 {ELF::NT_S390_TODCMP, "NT_S390_TODCMP (s390 TOD comparator register)"}, 4747 {ELF::NT_S390_TODPREG, 4748 "NT_S390_TODPREG (s390 TOD programmable register)"}, 4749 {ELF::NT_S390_CTRS, "NT_S390_CTRS (s390 control registers)"}, 4750 {ELF::NT_S390_PREFIX, "NT_S390_PREFIX (s390 prefix register)"}, 4751 {ELF::NT_S390_LAST_BREAK, 4752 "NT_S390_LAST_BREAK (s390 last breaking event address)"}, 4753 {ELF::NT_S390_SYSTEM_CALL, 4754 "NT_S390_SYSTEM_CALL (s390 system call restart data)"}, 4755 {ELF::NT_S390_TDB, "NT_S390_TDB (s390 transaction diagnostic block)"}, 4756 {ELF::NT_S390_VXRS_LOW, 4757 "NT_S390_VXRS_LOW (s390 vector registers 0-15 upper half)"}, 4758 {ELF::NT_S390_VXRS_HIGH, 4759 "NT_S390_VXRS_HIGH (s390 vector registers 16-31)"}, 4760 {ELF::NT_S390_GS_CB, "NT_S390_GS_CB (s390 guarded-storage registers)"}, 4761 {ELF::NT_S390_GS_BC, 4762 "NT_S390_GS_BC (s390 guarded-storage broadcast control)"}, 4763 4764 {ELF::NT_ARM_VFP, "NT_ARM_VFP (arm VFP registers)"}, 4765 {ELF::NT_ARM_TLS, "NT_ARM_TLS (AArch TLS registers)"}, 4766 {ELF::NT_ARM_HW_BREAK, 4767 "NT_ARM_HW_BREAK (AArch hardware breakpoint registers)"}, 4768 {ELF::NT_ARM_HW_WATCH, 4769 "NT_ARM_HW_WATCH (AArch hardware watchpoint registers)"}, 4770 4771 {ELF::NT_FILE, "NT_FILE (mapped files)"}, 4772 {ELF::NT_PRXFPREG, "NT_PRXFPREG (user_xfpregs structure)"}, 4773 {ELF::NT_SIGINFO, "NT_SIGINFO (siginfo_t data)"}, 4774 }; 4775 4776 for (const auto &Note : Notes) 4777 if (Note.ID == NT) 4778 return Note.Name; 4779 4780 return ""; 4781 } 4782 4783 static std::string getGNUNoteTypeName(const uint32_t NT) { 4784 static const struct { 4785 uint32_t ID; 4786 const char *Name; 4787 } Notes[] = { 4788 {ELF::NT_GNU_ABI_TAG, "NT_GNU_ABI_TAG (ABI version tag)"}, 4789 {ELF::NT_GNU_HWCAP, "NT_GNU_HWCAP (DSO-supplied software HWCAP info)"}, 4790 {ELF::NT_GNU_BUILD_ID, "NT_GNU_BUILD_ID (unique build ID bitstring)"}, 4791 {ELF::NT_GNU_GOLD_VERSION, "NT_GNU_GOLD_VERSION (gold version)"}, 4792 {ELF::NT_GNU_PROPERTY_TYPE_0, "NT_GNU_PROPERTY_TYPE_0 (property note)"}, 4793 }; 4794 4795 for (const auto &Note : Notes) 4796 if (Note.ID == NT) 4797 return std::string(Note.Name); 4798 4799 std::string string; 4800 raw_string_ostream OS(string); 4801 OS << format("Unknown note type (0x%08x)", NT); 4802 return OS.str(); 4803 } 4804 4805 static std::string getFreeBSDNoteTypeName(const uint32_t NT) { 4806 static const struct { 4807 uint32_t ID; 4808 const char *Name; 4809 } Notes[] = { 4810 {ELF::NT_FREEBSD_THRMISC, "NT_THRMISC (thrmisc structure)"}, 4811 {ELF::NT_FREEBSD_PROCSTAT_PROC, "NT_PROCSTAT_PROC (proc data)"}, 4812 {ELF::NT_FREEBSD_PROCSTAT_FILES, "NT_PROCSTAT_FILES (files data)"}, 4813 {ELF::NT_FREEBSD_PROCSTAT_VMMAP, "NT_PROCSTAT_VMMAP (vmmap data)"}, 4814 {ELF::NT_FREEBSD_PROCSTAT_GROUPS, "NT_PROCSTAT_GROUPS (groups data)"}, 4815 {ELF::NT_FREEBSD_PROCSTAT_UMASK, "NT_PROCSTAT_UMASK (umask data)"}, 4816 {ELF::NT_FREEBSD_PROCSTAT_RLIMIT, "NT_PROCSTAT_RLIMIT (rlimit data)"}, 4817 {ELF::NT_FREEBSD_PROCSTAT_OSREL, "NT_PROCSTAT_OSREL (osreldate data)"}, 4818 {ELF::NT_FREEBSD_PROCSTAT_PSSTRINGS, 4819 "NT_PROCSTAT_PSSTRINGS (ps_strings data)"}, 4820 {ELF::NT_FREEBSD_PROCSTAT_AUXV, "NT_PROCSTAT_AUXV (auxv data)"}, 4821 }; 4822 4823 for (const auto &Note : Notes) 4824 if (Note.ID == NT) 4825 return std::string(Note.Name); 4826 4827 std::string string; 4828 raw_string_ostream OS(string); 4829 OS << format("Unknown note type (0x%08x)", NT); 4830 return OS.str(); 4831 } 4832 4833 static std::string getAMDNoteTypeName(const uint32_t NT) { 4834 static const struct { 4835 uint32_t ID; 4836 const char *Name; 4837 } Notes[] = {{ELF::NT_AMD_AMDGPU_HSA_METADATA, 4838 "NT_AMD_AMDGPU_HSA_METADATA (HSA Metadata)"}, 4839 {ELF::NT_AMD_AMDGPU_ISA, "NT_AMD_AMDGPU_ISA (ISA Version)"}, 4840 {ELF::NT_AMD_AMDGPU_PAL_METADATA, 4841 "NT_AMD_AMDGPU_PAL_METADATA (PAL Metadata)"}}; 4842 4843 for (const auto &Note : Notes) 4844 if (Note.ID == NT) 4845 return std::string(Note.Name); 4846 4847 std::string string; 4848 raw_string_ostream OS(string); 4849 OS << format("Unknown note type (0x%08x)", NT); 4850 return OS.str(); 4851 } 4852 4853 static std::string getAMDGPUNoteTypeName(const uint32_t NT) { 4854 if (NT == ELF::NT_AMDGPU_METADATA) 4855 return std::string("NT_AMDGPU_METADATA (AMDGPU Metadata)"); 4856 4857 std::string string; 4858 raw_string_ostream OS(string); 4859 OS << format("Unknown note type (0x%08x)", NT); 4860 return OS.str(); 4861 } 4862 4863 template <typename ELFT> 4864 static std::string getGNUProperty(uint32_t Type, uint32_t DataSize, 4865 ArrayRef<uint8_t> Data) { 4866 std::string str; 4867 raw_string_ostream OS(str); 4868 uint32_t PrData; 4869 auto DumpBit = [&](uint32_t Flag, StringRef Name) { 4870 if (PrData & Flag) { 4871 PrData &= ~Flag; 4872 OS << Name; 4873 if (PrData) 4874 OS << ", "; 4875 } 4876 }; 4877 4878 switch (Type) { 4879 default: 4880 OS << format("<application-specific type 0x%x>", Type); 4881 return OS.str(); 4882 case GNU_PROPERTY_STACK_SIZE: { 4883 OS << "stack size: "; 4884 if (DataSize == sizeof(typename ELFT::uint)) 4885 OS << formatv("{0:x}", 4886 (uint64_t)(*(const typename ELFT::Addr *)Data.data())); 4887 else 4888 OS << format("<corrupt length: 0x%x>", DataSize); 4889 return OS.str(); 4890 } 4891 case GNU_PROPERTY_NO_COPY_ON_PROTECTED: 4892 OS << "no copy on protected"; 4893 if (DataSize) 4894 OS << format(" <corrupt length: 0x%x>", DataSize); 4895 return OS.str(); 4896 case GNU_PROPERTY_AARCH64_FEATURE_1_AND: 4897 case GNU_PROPERTY_X86_FEATURE_1_AND: 4898 OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: " 4899 : "x86 feature: "); 4900 if (DataSize != 4) { 4901 OS << format("<corrupt length: 0x%x>", DataSize); 4902 return OS.str(); 4903 } 4904 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4905 if (PrData == 0) { 4906 OS << "<None>"; 4907 return OS.str(); 4908 } 4909 if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) { 4910 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI"); 4911 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC"); 4912 } else { 4913 DumpBit(GNU_PROPERTY_X86_FEATURE_1_IBT, "IBT"); 4914 DumpBit(GNU_PROPERTY_X86_FEATURE_1_SHSTK, "SHSTK"); 4915 } 4916 if (PrData) 4917 OS << format("<unknown flags: 0x%x>", PrData); 4918 return OS.str(); 4919 case GNU_PROPERTY_X86_ISA_1_NEEDED: 4920 case GNU_PROPERTY_X86_ISA_1_USED: 4921 OS << "x86 ISA " 4922 << (Type == GNU_PROPERTY_X86_ISA_1_NEEDED ? "needed: " : "used: "); 4923 if (DataSize != 4) { 4924 OS << format("<corrupt length: 0x%x>", DataSize); 4925 return OS.str(); 4926 } 4927 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4928 if (PrData == 0) { 4929 OS << "<None>"; 4930 return OS.str(); 4931 } 4932 DumpBit(GNU_PROPERTY_X86_ISA_1_CMOV, "CMOV"); 4933 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE, "SSE"); 4934 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE2, "SSE2"); 4935 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE3, "SSE3"); 4936 DumpBit(GNU_PROPERTY_X86_ISA_1_SSSE3, "SSSE3"); 4937 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_1, "SSE4_1"); 4938 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_2, "SSE4_2"); 4939 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX, "AVX"); 4940 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX2, "AVX2"); 4941 DumpBit(GNU_PROPERTY_X86_ISA_1_FMA, "FMA"); 4942 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512F, "AVX512F"); 4943 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512CD, "AVX512CD"); 4944 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512ER, "AVX512ER"); 4945 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512PF, "AVX512PF"); 4946 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512VL, "AVX512VL"); 4947 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512DQ, "AVX512DQ"); 4948 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512BW, "AVX512BW"); 4949 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4FMAPS, "AVX512_4FMAPS"); 4950 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4VNNIW, "AVX512_4VNNIW"); 4951 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_BITALG, "AVX512_BITALG"); 4952 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_IFMA, "AVX512_IFMA"); 4953 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI, "AVX512_VBMI"); 4954 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI2, "AVX512_VBMI2"); 4955 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VNNI, "AVX512_VNNI"); 4956 if (PrData) 4957 OS << format("<unknown flags: 0x%x>", PrData); 4958 return OS.str(); 4959 break; 4960 case GNU_PROPERTY_X86_FEATURE_2_NEEDED: 4961 case GNU_PROPERTY_X86_FEATURE_2_USED: 4962 OS << "x86 feature " 4963 << (Type == GNU_PROPERTY_X86_FEATURE_2_NEEDED ? "needed: " : "used: "); 4964 if (DataSize != 4) { 4965 OS << format("<corrupt length: 0x%x>", DataSize); 4966 return OS.str(); 4967 } 4968 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4969 if (PrData == 0) { 4970 OS << "<None>"; 4971 return OS.str(); 4972 } 4973 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X86, "x86"); 4974 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X87, "x87"); 4975 DumpBit(GNU_PROPERTY_X86_FEATURE_2_MMX, "MMX"); 4976 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XMM, "XMM"); 4977 DumpBit(GNU_PROPERTY_X86_FEATURE_2_YMM, "YMM"); 4978 DumpBit(GNU_PROPERTY_X86_FEATURE_2_ZMM, "ZMM"); 4979 DumpBit(GNU_PROPERTY_X86_FEATURE_2_FXSR, "FXSR"); 4980 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVE, "XSAVE"); 4981 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT, "XSAVEOPT"); 4982 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEC, "XSAVEC"); 4983 if (PrData) 4984 OS << format("<unknown flags: 0x%x>", PrData); 4985 return OS.str(); 4986 } 4987 } 4988 4989 template <typename ELFT> 4990 static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) { 4991 using Elf_Word = typename ELFT::Word; 4992 4993 SmallVector<std::string, 4> Properties; 4994 while (Arr.size() >= 8) { 4995 uint32_t Type = *reinterpret_cast<const Elf_Word *>(Arr.data()); 4996 uint32_t DataSize = *reinterpret_cast<const Elf_Word *>(Arr.data() + 4); 4997 Arr = Arr.drop_front(8); 4998 4999 // Take padding size into account if present. 5000 uint64_t PaddedSize = alignTo(DataSize, sizeof(typename ELFT::uint)); 5001 std::string str; 5002 raw_string_ostream OS(str); 5003 if (Arr.size() < PaddedSize) { 5004 OS << format("<corrupt type (0x%x) datasz: 0x%x>", Type, DataSize); 5005 Properties.push_back(OS.str()); 5006 break; 5007 } 5008 Properties.push_back( 5009 getGNUProperty<ELFT>(Type, DataSize, Arr.take_front(PaddedSize))); 5010 Arr = Arr.drop_front(PaddedSize); 5011 } 5012 5013 if (!Arr.empty()) 5014 Properties.push_back("<corrupted GNU_PROPERTY_TYPE_0>"); 5015 5016 return Properties; 5017 } 5018 5019 struct GNUAbiTag { 5020 std::string OSName; 5021 std::string ABI; 5022 bool IsValid; 5023 }; 5024 5025 template <typename ELFT> static GNUAbiTag getGNUAbiTag(ArrayRef<uint8_t> Desc) { 5026 typedef typename ELFT::Word Elf_Word; 5027 5028 ArrayRef<Elf_Word> Words(reinterpret_cast<const Elf_Word *>(Desc.begin()), 5029 reinterpret_cast<const Elf_Word *>(Desc.end())); 5030 5031 if (Words.size() < 4) 5032 return {"", "", /*IsValid=*/false}; 5033 5034 static const char *OSNames[] = { 5035 "Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable", "NaCl", 5036 }; 5037 StringRef OSName = "Unknown"; 5038 if (Words[0] < array_lengthof(OSNames)) 5039 OSName = OSNames[Words[0]]; 5040 uint32_t Major = Words[1], Minor = Words[2], Patch = Words[3]; 5041 std::string str; 5042 raw_string_ostream ABI(str); 5043 ABI << Major << "." << Minor << "." << Patch; 5044 return {std::string(OSName), ABI.str(), /*IsValid=*/true}; 5045 } 5046 5047 static std::string getGNUBuildId(ArrayRef<uint8_t> Desc) { 5048 std::string str; 5049 raw_string_ostream OS(str); 5050 for (const auto &B : Desc) 5051 OS << format_hex_no_prefix(B, 2); 5052 return OS.str(); 5053 } 5054 5055 static StringRef getGNUGoldVersion(ArrayRef<uint8_t> Desc) { 5056 return StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5057 } 5058 5059 template <typename ELFT> 5060 static void printGNUNote(raw_ostream &OS, uint32_t NoteType, 5061 ArrayRef<uint8_t> Desc) { 5062 switch (NoteType) { 5063 default: 5064 return; 5065 case ELF::NT_GNU_ABI_TAG: { 5066 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 5067 if (!AbiTag.IsValid) 5068 OS << " <corrupt GNU_ABI_TAG>"; 5069 else 5070 OS << " OS: " << AbiTag.OSName << ", ABI: " << AbiTag.ABI; 5071 break; 5072 } 5073 case ELF::NT_GNU_BUILD_ID: { 5074 OS << " Build ID: " << getGNUBuildId(Desc); 5075 break; 5076 } 5077 case ELF::NT_GNU_GOLD_VERSION: 5078 OS << " Version: " << getGNUGoldVersion(Desc); 5079 break; 5080 case ELF::NT_GNU_PROPERTY_TYPE_0: 5081 OS << " Properties:"; 5082 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 5083 OS << " " << Property << "\n"; 5084 break; 5085 } 5086 OS << '\n'; 5087 } 5088 5089 struct AMDNote { 5090 std::string Type; 5091 std::string Value; 5092 }; 5093 5094 template <typename ELFT> 5095 static AMDNote getAMDNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5096 switch (NoteType) { 5097 default: 5098 return {"", ""}; 5099 case ELF::NT_AMD_AMDGPU_HSA_METADATA: 5100 return { 5101 "HSA Metadata", 5102 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5103 case ELF::NT_AMD_AMDGPU_ISA: 5104 return { 5105 "ISA Version", 5106 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5107 } 5108 } 5109 5110 struct AMDGPUNote { 5111 std::string Type; 5112 std::string Value; 5113 }; 5114 5115 template <typename ELFT> 5116 static AMDGPUNote getAMDGPUNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5117 switch (NoteType) { 5118 default: 5119 return {"", ""}; 5120 case ELF::NT_AMDGPU_METADATA: { 5121 auto MsgPackString = 5122 StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5123 msgpack::Document MsgPackDoc; 5124 if (!MsgPackDoc.readFromBlob(MsgPackString, /*Multi=*/false)) 5125 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5126 5127 AMDGPU::HSAMD::V3::MetadataVerifier Verifier(true); 5128 if (!Verifier.verify(MsgPackDoc.getRoot())) 5129 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5130 5131 std::string HSAMetadataString; 5132 raw_string_ostream StrOS(HSAMetadataString); 5133 MsgPackDoc.toYAML(StrOS); 5134 5135 return {"AMDGPU Metadata", StrOS.str()}; 5136 } 5137 } 5138 } 5139 5140 struct CoreFileMapping { 5141 uint64_t Start, End, Offset; 5142 StringRef Filename; 5143 }; 5144 5145 struct CoreNote { 5146 uint64_t PageSize; 5147 std::vector<CoreFileMapping> Mappings; 5148 }; 5149 5150 static Expected<CoreNote> readCoreNote(DataExtractor Desc) { 5151 // Expected format of the NT_FILE note description: 5152 // 1. # of file mappings (call it N) 5153 // 2. Page size 5154 // 3. N (start, end, offset) triples 5155 // 4. N packed filenames (null delimited) 5156 // Each field is an Elf_Addr, except for filenames which are char* strings. 5157 5158 CoreNote Ret; 5159 const int Bytes = Desc.getAddressSize(); 5160 5161 if (!Desc.isValidOffsetForAddress(2)) 5162 return createStringError(object_error::parse_failed, 5163 "malformed note: header too short"); 5164 if (Desc.getData().back() != 0) 5165 return createStringError(object_error::parse_failed, 5166 "malformed note: not NUL terminated"); 5167 5168 uint64_t DescOffset = 0; 5169 uint64_t FileCount = Desc.getAddress(&DescOffset); 5170 Ret.PageSize = Desc.getAddress(&DescOffset); 5171 5172 if (!Desc.isValidOffsetForAddress(3 * FileCount * Bytes)) 5173 return createStringError(object_error::parse_failed, 5174 "malformed note: too short for number of files"); 5175 5176 uint64_t FilenamesOffset = 0; 5177 DataExtractor Filenames( 5178 Desc.getData().drop_front(DescOffset + 3 * FileCount * Bytes), 5179 Desc.isLittleEndian(), Desc.getAddressSize()); 5180 5181 Ret.Mappings.resize(FileCount); 5182 for (CoreFileMapping &Mapping : Ret.Mappings) { 5183 if (!Filenames.isValidOffsetForDataOfSize(FilenamesOffset, 1)) 5184 return createStringError(object_error::parse_failed, 5185 "malformed note: too few filenames"); 5186 Mapping.Start = Desc.getAddress(&DescOffset); 5187 Mapping.End = Desc.getAddress(&DescOffset); 5188 Mapping.Offset = Desc.getAddress(&DescOffset); 5189 Mapping.Filename = Filenames.getCStrRef(&FilenamesOffset); 5190 } 5191 5192 return Ret; 5193 } 5194 5195 template <typename ELFT> 5196 static void printCoreNote(raw_ostream &OS, const CoreNote &Note) { 5197 // Length of "0x<address>" string. 5198 const int FieldWidth = ELFT::Is64Bits ? 18 : 10; 5199 5200 OS << " Page size: " << format_decimal(Note.PageSize, 0) << '\n'; 5201 OS << " " << right_justify("Start", FieldWidth) << " " 5202 << right_justify("End", FieldWidth) << " " 5203 << right_justify("Page Offset", FieldWidth) << '\n'; 5204 for (const CoreFileMapping &Mapping : Note.Mappings) { 5205 OS << " " << format_hex(Mapping.Start, FieldWidth) << " " 5206 << format_hex(Mapping.End, FieldWidth) << " " 5207 << format_hex(Mapping.Offset, FieldWidth) << "\n " 5208 << Mapping.Filename << '\n'; 5209 } 5210 } 5211 5212 template <class ELFT> 5213 void GNUStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 5214 auto PrintHeader = [&](Optional<StringRef> SecName, 5215 const typename ELFT::Off Offset, 5216 const typename ELFT::Addr Size) { 5217 OS << "Displaying notes found "; 5218 5219 if (SecName) 5220 OS << "in: " << *SecName << "\n"; 5221 else 5222 OS << "at file offset " << format_hex(Offset, 10) << " with length " 5223 << format_hex(Size, 10) << ":\n"; 5224 5225 OS << " Owner Data size \tDescription\n"; 5226 }; 5227 5228 auto ProcessNote = [&](const Elf_Note &Note) { 5229 StringRef Name = Note.getName(); 5230 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 5231 Elf_Word Type = Note.getType(); 5232 5233 // Print the note owner/type. 5234 OS << " " << left_justify(Name, 20) << ' ' 5235 << format_hex(Descriptor.size(), 10) << '\t'; 5236 if (Name == "GNU") { 5237 OS << getGNUNoteTypeName(Type) << '\n'; 5238 } else if (Name == "FreeBSD") { 5239 OS << getFreeBSDNoteTypeName(Type) << '\n'; 5240 } else if (Name == "AMD") { 5241 OS << getAMDNoteTypeName(Type) << '\n'; 5242 } else if (Name == "AMDGPU") { 5243 OS << getAMDGPUNoteTypeName(Type) << '\n'; 5244 } else { 5245 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 5246 ? getCoreNoteTypeName(Type) 5247 : getGenericNoteTypeName(Type); 5248 if (!NoteType.empty()) 5249 OS << NoteType << '\n'; 5250 else 5251 OS << "Unknown note type: (" << format_hex(Type, 10) << ")\n"; 5252 } 5253 5254 // Print the description, or fallback to printing raw bytes for unknown 5255 // owners. 5256 if (Name == "GNU") { 5257 printGNUNote<ELFT>(OS, Type, Descriptor); 5258 } else if (Name == "AMD") { 5259 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 5260 if (!N.Type.empty()) 5261 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5262 } else if (Name == "AMDGPU") { 5263 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 5264 if (!N.Type.empty()) 5265 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5266 } else if (Name == "CORE") { 5267 if (Type == ELF::NT_FILE) { 5268 DataExtractor DescExtractor(Descriptor, 5269 ELFT::TargetEndianness == support::little, 5270 sizeof(Elf_Addr)); 5271 Expected<CoreNote> Note = readCoreNote(DescExtractor); 5272 if (Note) 5273 printCoreNote<ELFT>(OS, *Note); 5274 else 5275 reportWarning(Note.takeError(), this->FileName); 5276 } 5277 } else if (!Descriptor.empty()) { 5278 OS << " description data:"; 5279 for (uint8_t B : Descriptor) 5280 OS << " " << format("%02x", B); 5281 OS << '\n'; 5282 } 5283 }; 5284 5285 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 5286 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 5287 for (const auto &S : Sections) { 5288 if (S.sh_type != SHT_NOTE) 5289 continue; 5290 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 5291 S.sh_size); 5292 Error Err = Error::success(); 5293 for (auto Note : Obj->notes(S, Err)) 5294 ProcessNote(Note); 5295 if (Err) 5296 reportError(std::move(Err), this->FileName); 5297 } 5298 } else { 5299 for (const auto &P : 5300 unwrapOrError(this->FileName, Obj->program_headers())) { 5301 if (P.p_type != PT_NOTE) 5302 continue; 5303 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 5304 Error Err = Error::success(); 5305 for (auto Note : Obj->notes(P, Err)) 5306 ProcessNote(Note); 5307 if (Err) 5308 reportError(std::move(Err), this->FileName); 5309 } 5310 } 5311 } 5312 5313 template <class ELFT> 5314 void GNUStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 5315 OS << "printELFLinkerOptions not implemented!\n"; 5316 } 5317 5318 template <class ELFT> 5319 void DumpStyle<ELFT>::printDependentLibsHelper( 5320 const ELFFile<ELFT> *Obj, 5321 function_ref<void(const Elf_Shdr &)> OnSectionStart, 5322 function_ref<void(StringRef, uint64_t)> OnLibEntry) { 5323 auto Warn = [this](unsigned SecNdx, StringRef Msg) { 5324 this->reportUniqueWarning( 5325 createError("SHT_LLVM_DEPENDENT_LIBRARIES section at index " + 5326 Twine(SecNdx) + " is broken: " + Msg)); 5327 }; 5328 5329 unsigned I = -1; 5330 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 5331 ++I; 5332 if (Shdr.sh_type != ELF::SHT_LLVM_DEPENDENT_LIBRARIES) 5333 continue; 5334 5335 OnSectionStart(Shdr); 5336 5337 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(&Shdr); 5338 if (!ContentsOrErr) { 5339 Warn(I, toString(ContentsOrErr.takeError())); 5340 continue; 5341 } 5342 5343 ArrayRef<uint8_t> Contents = *ContentsOrErr; 5344 if (!Contents.empty() && Contents.back() != 0) { 5345 Warn(I, "the content is not null-terminated"); 5346 continue; 5347 } 5348 5349 for (const uint8_t *I = Contents.begin(), *E = Contents.end(); I < E;) { 5350 StringRef Lib((const char *)I); 5351 OnLibEntry(Lib, I - Contents.begin()); 5352 I += Lib.size() + 1; 5353 } 5354 } 5355 } 5356 5357 template <class ELFT> 5358 void GNUStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 5359 bool SectionStarted = false; 5360 struct NameOffset { 5361 StringRef Name; 5362 uint64_t Offset; 5363 }; 5364 std::vector<NameOffset> SecEntries; 5365 NameOffset Current; 5366 auto PrintSection = [&]() { 5367 OS << "Dependent libraries section " << Current.Name << " at offset " 5368 << format_hex(Current.Offset, 1) << " contains " << SecEntries.size() 5369 << " entries:\n"; 5370 for (NameOffset Entry : SecEntries) 5371 OS << " [" << format("%6tx", Entry.Offset) << "] " << Entry.Name 5372 << "\n"; 5373 OS << "\n"; 5374 SecEntries.clear(); 5375 }; 5376 5377 auto OnSectionStart = [&](const Elf_Shdr &Shdr) { 5378 if (SectionStarted) 5379 PrintSection(); 5380 SectionStarted = true; 5381 Current.Offset = Shdr.sh_offset; 5382 Expected<StringRef> Name = Obj->getSectionName(&Shdr); 5383 if (!Name) { 5384 Current.Name = "<?>"; 5385 this->reportUniqueWarning( 5386 createError("cannot get section name of " 5387 "SHT_LLVM_DEPENDENT_LIBRARIES section: " + 5388 toString(Name.takeError()))); 5389 } else { 5390 Current.Name = *Name; 5391 } 5392 }; 5393 auto OnLibEntry = [&](StringRef Lib, uint64_t Offset) { 5394 SecEntries.push_back(NameOffset{Lib, Offset}); 5395 }; 5396 5397 this->printDependentLibsHelper(Obj, OnSectionStart, OnLibEntry); 5398 if (SectionStarted) 5399 PrintSection(); 5400 } 5401 5402 // Used for printing section names in places where possible errors can be 5403 // ignored. 5404 static StringRef getSectionName(const SectionRef &Sec) { 5405 Expected<StringRef> NameOrErr = Sec.getName(); 5406 if (NameOrErr) 5407 return *NameOrErr; 5408 consumeError(NameOrErr.takeError()); 5409 return "<?>"; 5410 } 5411 5412 // Used for printing symbol names in places where possible errors can be 5413 // ignored. 5414 static std::string getSymbolName(const ELFSymbolRef &Sym) { 5415 Expected<StringRef> NameOrErr = Sym.getName(); 5416 if (NameOrErr) 5417 return maybeDemangle(*NameOrErr); 5418 consumeError(NameOrErr.takeError()); 5419 return "<?>"; 5420 } 5421 5422 template <class ELFT> 5423 void DumpStyle<ELFT>::printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, 5424 uint64_t SymValue, 5425 Optional<SectionRef> FunctionSec, 5426 const StringRef SectionName, 5427 DataExtractor Data, 5428 uint64_t *Offset) { 5429 // This function ignores potentially erroneous input, unless it is directly 5430 // related to stack size reporting. 5431 SymbolRef FuncSym; 5432 for (const ELFSymbolRef &Symbol : Obj->symbols()) { 5433 Expected<uint64_t> SymAddrOrErr = Symbol.getAddress(); 5434 if (!SymAddrOrErr) { 5435 consumeError(SymAddrOrErr.takeError()); 5436 continue; 5437 } 5438 if (Expected<uint32_t> SymFlags = Symbol.getFlags()) { 5439 if (*SymFlags & SymbolRef::SF_Undefined) 5440 continue; 5441 } else 5442 consumeError(SymFlags.takeError()); 5443 if (Symbol.getELFType() == ELF::STT_FUNC && *SymAddrOrErr == SymValue) { 5444 // Check if the symbol is in the right section. FunctionSec == None means 5445 // "any section". 5446 if (!FunctionSec || FunctionSec->containsSymbol(Symbol)) { 5447 FuncSym = Symbol; 5448 break; 5449 } 5450 } 5451 } 5452 5453 std::string FuncName = "?"; 5454 // A valid SymbolRef has a non-null object file pointer. 5455 if (FuncSym.BasicSymbolRef::getObject()) 5456 FuncName = getSymbolName(FuncSym); 5457 else 5458 reportWarning( 5459 createError("could not identify function symbol for stack size entry"), 5460 Obj->getFileName()); 5461 5462 // Extract the size. The expectation is that Offset is pointing to the right 5463 // place, i.e. past the function address. 5464 uint64_t PrevOffset = *Offset; 5465 uint64_t StackSize = Data.getULEB128(Offset); 5466 // getULEB128() does not advance Offset if it is not able to extract a valid 5467 // integer. 5468 if (*Offset == PrevOffset) 5469 reportError( 5470 createStringError(object_error::parse_failed, 5471 "could not extract a valid stack size in section %s", 5472 SectionName.data()), 5473 Obj->getFileName()); 5474 5475 printStackSizeEntry(StackSize, FuncName); 5476 } 5477 5478 template <class ELFT> 5479 void GNUStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 5480 OS.PadToColumn(2); 5481 OS << format_decimal(Size, 11); 5482 OS.PadToColumn(18); 5483 OS << FuncName << "\n"; 5484 } 5485 5486 template <class ELFT> 5487 void DumpStyle<ELFT>::printStackSize(const ELFObjectFile<ELFT> *Obj, 5488 RelocationRef Reloc, 5489 SectionRef FunctionSec, 5490 const StringRef &StackSizeSectionName, 5491 const RelocationResolver &Resolver, 5492 DataExtractor Data) { 5493 // This function ignores potentially erroneous input, unless it is directly 5494 // related to stack size reporting. 5495 object::symbol_iterator RelocSym = Reloc.getSymbol(); 5496 uint64_t RelocSymValue = 0; 5497 StringRef FileStr = Obj->getFileName(); 5498 if (RelocSym != Obj->symbol_end()) { 5499 // Ensure that the relocation symbol is in the function section, i.e. the 5500 // section where the functions whose stack sizes we are reporting are 5501 // located. 5502 auto SectionOrErr = RelocSym->getSection(); 5503 if (!SectionOrErr) { 5504 reportWarning( 5505 createError("cannot identify the section for relocation symbol '" + 5506 getSymbolName(*RelocSym) + "'"), 5507 FileStr); 5508 consumeError(SectionOrErr.takeError()); 5509 } else if (*SectionOrErr != FunctionSec) { 5510 reportWarning(createError("relocation symbol '" + 5511 getSymbolName(*RelocSym) + 5512 "' is not in the expected section"), 5513 FileStr); 5514 // Pretend that the symbol is in the correct section and report its 5515 // stack size anyway. 5516 FunctionSec = **SectionOrErr; 5517 } 5518 5519 Expected<uint64_t> RelocSymValueOrErr = RelocSym->getValue(); 5520 if (RelocSymValueOrErr) 5521 RelocSymValue = *RelocSymValueOrErr; 5522 else 5523 consumeError(RelocSymValueOrErr.takeError()); 5524 } 5525 5526 uint64_t Offset = Reloc.getOffset(); 5527 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) 5528 reportError( 5529 createStringError(object_error::parse_failed, 5530 "found invalid relocation offset into section %s " 5531 "while trying to extract a stack size entry", 5532 StackSizeSectionName.data()), 5533 FileStr); 5534 5535 uint64_t Addend = Data.getAddress(&Offset); 5536 uint64_t SymValue = Resolver(Reloc, RelocSymValue, Addend); 5537 this->printFunctionStackSize(Obj, SymValue, FunctionSec, StackSizeSectionName, 5538 Data, &Offset); 5539 } 5540 5541 template <class ELFT> 5542 void DumpStyle<ELFT>::printNonRelocatableStackSizes( 5543 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5544 // This function ignores potentially erroneous input, unless it is directly 5545 // related to stack size reporting. 5546 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5547 StringRef FileStr = Obj->getFileName(); 5548 for (const SectionRef &Sec : Obj->sections()) { 5549 StringRef SectionName = getSectionName(Sec); 5550 if (SectionName != ".stack_sizes") 5551 continue; 5552 PrintHeader(); 5553 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5554 ArrayRef<uint8_t> Contents = 5555 unwrapOrError(this->FileName, EF->getSectionContents(ElfSec)); 5556 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5557 uint64_t Offset = 0; 5558 while (Offset < Contents.size()) { 5559 // The function address is followed by a ULEB representing the stack 5560 // size. Check for an extra byte before we try to process the entry. 5561 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) { 5562 reportError( 5563 createStringError( 5564 object_error::parse_failed, 5565 "section %s ended while trying to extract a stack size entry", 5566 SectionName.data()), 5567 FileStr); 5568 } 5569 uint64_t SymValue = Data.getAddress(&Offset); 5570 printFunctionStackSize(Obj, SymValue, /*FunctionSec=*/None, SectionName, 5571 Data, &Offset); 5572 } 5573 } 5574 } 5575 5576 template <class ELFT> 5577 void DumpStyle<ELFT>::printRelocatableStackSizes( 5578 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5579 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5580 5581 // Build a map between stack size sections and their corresponding relocation 5582 // sections. 5583 llvm::MapVector<SectionRef, SectionRef> StackSizeRelocMap; 5584 const SectionRef NullSection{}; 5585 5586 for (const SectionRef &Sec : Obj->sections()) { 5587 StringRef SectionName; 5588 if (Expected<StringRef> NameOrErr = Sec.getName()) 5589 SectionName = *NameOrErr; 5590 else 5591 consumeError(NameOrErr.takeError()); 5592 5593 // A stack size section that we haven't encountered yet is mapped to the 5594 // null section until we find its corresponding relocation section. 5595 if (SectionName == ".stack_sizes") 5596 if (StackSizeRelocMap.count(Sec) == 0) { 5597 StackSizeRelocMap[Sec] = NullSection; 5598 continue; 5599 } 5600 5601 // Check relocation sections if they are relocating contents of a 5602 // stack sizes section. 5603 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5604 uint32_t SectionType = ElfSec->sh_type; 5605 if (SectionType != ELF::SHT_RELA && SectionType != ELF::SHT_REL) 5606 continue; 5607 5608 Expected<section_iterator> RelSecOrErr = Sec.getRelocatedSection(); 5609 if (!RelSecOrErr) 5610 reportError(createStringError(object_error::parse_failed, 5611 "%s: failed to get a relocated section: %s", 5612 SectionName.data(), 5613 toString(RelSecOrErr.takeError()).c_str()), 5614 Obj->getFileName()); 5615 5616 const Elf_Shdr *ContentsSec = 5617 Obj->getSection((*RelSecOrErr)->getRawDataRefImpl()); 5618 Expected<StringRef> ContentsSectionNameOrErr = 5619 EF->getSectionName(ContentsSec); 5620 if (!ContentsSectionNameOrErr) { 5621 consumeError(ContentsSectionNameOrErr.takeError()); 5622 continue; 5623 } 5624 if (*ContentsSectionNameOrErr != ".stack_sizes") 5625 continue; 5626 // Insert a mapping from the stack sizes section to its relocation section. 5627 StackSizeRelocMap[Obj->toSectionRef(ContentsSec)] = Sec; 5628 } 5629 5630 for (const auto &StackSizeMapEntry : StackSizeRelocMap) { 5631 PrintHeader(); 5632 const SectionRef &StackSizesSec = StackSizeMapEntry.first; 5633 const SectionRef &RelocSec = StackSizeMapEntry.second; 5634 5635 // Warn about stack size sections without a relocation section. 5636 StringRef StackSizeSectionName = getSectionName(StackSizesSec); 5637 if (RelocSec == NullSection) { 5638 reportWarning(createError("section " + StackSizeSectionName + 5639 " does not have a corresponding " 5640 "relocation section"), 5641 Obj->getFileName()); 5642 continue; 5643 } 5644 5645 // A .stack_sizes section header's sh_link field is supposed to point 5646 // to the section that contains the functions whose stack sizes are 5647 // described in it. 5648 const Elf_Shdr *StackSizesELFSec = 5649 Obj->getSection(StackSizesSec.getRawDataRefImpl()); 5650 const SectionRef FunctionSec = Obj->toSectionRef(unwrapOrError( 5651 this->FileName, EF->getSection(StackSizesELFSec->sh_link))); 5652 5653 bool (*IsSupportedFn)(uint64_t); 5654 RelocationResolver Resolver; 5655 std::tie(IsSupportedFn, Resolver) = getRelocationResolver(*Obj); 5656 auto Contents = unwrapOrError(this->FileName, StackSizesSec.getContents()); 5657 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5658 for (const RelocationRef &Reloc : RelocSec.relocations()) { 5659 if (!IsSupportedFn || !IsSupportedFn(Reloc.getType())) 5660 reportError(createStringError( 5661 object_error::parse_failed, 5662 "unsupported relocation type in section %s: %s", 5663 getSectionName(RelocSec).data(), 5664 EF->getRelocationTypeName(Reloc.getType()).data()), 5665 Obj->getFileName()); 5666 this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName, 5667 Resolver, Data); 5668 } 5669 } 5670 } 5671 5672 template <class ELFT> 5673 void GNUStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 5674 bool HeaderHasBeenPrinted = false; 5675 auto PrintHeader = [&]() { 5676 if (HeaderHasBeenPrinted) 5677 return; 5678 OS << "\nStack Sizes:\n"; 5679 OS.PadToColumn(9); 5680 OS << "Size"; 5681 OS.PadToColumn(18); 5682 OS << "Function\n"; 5683 HeaderHasBeenPrinted = true; 5684 }; 5685 5686 // For non-relocatable objects, look directly for sections whose name starts 5687 // with .stack_sizes and process the contents. 5688 if (Obj->isRelocatableObject()) 5689 this->printRelocatableStackSizes(Obj, PrintHeader); 5690 else 5691 this->printNonRelocatableStackSizes(Obj, PrintHeader); 5692 } 5693 5694 template <class ELFT> 5695 void GNUStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 5696 size_t Bias = ELFT::Is64Bits ? 8 : 0; 5697 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 5698 OS.PadToColumn(2); 5699 OS << format_hex_no_prefix(Parser.getGotAddress(E), 8 + Bias); 5700 OS.PadToColumn(11 + Bias); 5701 OS << format_decimal(Parser.getGotOffset(E), 6) << "(gp)"; 5702 OS.PadToColumn(22 + Bias); 5703 OS << format_hex_no_prefix(*E, 8 + Bias); 5704 OS.PadToColumn(31 + 2 * Bias); 5705 OS << Purpose << "\n"; 5706 }; 5707 5708 OS << (Parser.IsStatic ? "Static GOT:\n" : "Primary GOT:\n"); 5709 OS << " Canonical gp value: " 5710 << format_hex_no_prefix(Parser.getGp(), 8 + Bias) << "\n\n"; 5711 5712 OS << " Reserved entries:\n"; 5713 if (ELFT::Is64Bits) 5714 OS << " Address Access Initial Purpose\n"; 5715 else 5716 OS << " Address Access Initial Purpose\n"; 5717 PrintEntry(Parser.getGotLazyResolver(), "Lazy resolver"); 5718 if (Parser.getGotModulePointer()) 5719 PrintEntry(Parser.getGotModulePointer(), "Module pointer (GNU extension)"); 5720 5721 if (!Parser.getLocalEntries().empty()) { 5722 OS << "\n"; 5723 OS << " Local entries:\n"; 5724 if (ELFT::Is64Bits) 5725 OS << " Address Access Initial\n"; 5726 else 5727 OS << " Address Access Initial\n"; 5728 for (auto &E : Parser.getLocalEntries()) 5729 PrintEntry(&E, ""); 5730 } 5731 5732 if (Parser.IsStatic) 5733 return; 5734 5735 if (!Parser.getGlobalEntries().empty()) { 5736 OS << "\n"; 5737 OS << " Global entries:\n"; 5738 if (ELFT::Is64Bits) 5739 OS << " Address Access Initial Sym.Val." 5740 << " Type Ndx Name\n"; 5741 else 5742 OS << " Address Access Initial Sym.Val. Type Ndx Name\n"; 5743 for (auto &E : Parser.getGlobalEntries()) { 5744 const Elf_Sym *Sym = Parser.getGotSym(&E); 5745 std::string SymName = this->dumper()->getFullSymbolName( 5746 Sym, this->dumper()->getDynamicStringTable(), false); 5747 5748 OS.PadToColumn(2); 5749 OS << to_string(format_hex_no_prefix(Parser.getGotAddress(&E), 8 + Bias)); 5750 OS.PadToColumn(11 + Bias); 5751 OS << to_string(format_decimal(Parser.getGotOffset(&E), 6)) + "(gp)"; 5752 OS.PadToColumn(22 + Bias); 5753 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5754 OS.PadToColumn(31 + 2 * Bias); 5755 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5756 OS.PadToColumn(40 + 3 * Bias); 5757 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5758 OS.PadToColumn(48 + 3 * Bias); 5759 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5760 this->dumper()->dynamic_symbols().begin()); 5761 OS.PadToColumn(52 + 3 * Bias); 5762 OS << SymName << "\n"; 5763 } 5764 } 5765 5766 if (!Parser.getOtherEntries().empty()) 5767 OS << "\n Number of TLS and multi-GOT entries " 5768 << Parser.getOtherEntries().size() << "\n"; 5769 } 5770 5771 template <class ELFT> 5772 void GNUStyle<ELFT>::printMipsPLT(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.getPltAddress(E), 8 + Bias); 5777 OS.PadToColumn(11 + Bias); 5778 OS << format_hex_no_prefix(*E, 8 + Bias); 5779 OS.PadToColumn(20 + 2 * Bias); 5780 OS << Purpose << "\n"; 5781 }; 5782 5783 OS << "PLT GOT:\n\n"; 5784 5785 OS << " Reserved entries:\n"; 5786 OS << " Address Initial Purpose\n"; 5787 PrintEntry(Parser.getPltLazyResolver(), "PLT lazy resolver"); 5788 if (Parser.getPltModulePointer()) 5789 PrintEntry(Parser.getPltModulePointer(), "Module pointer"); 5790 5791 if (!Parser.getPltEntries().empty()) { 5792 OS << "\n"; 5793 OS << " Entries:\n"; 5794 OS << " Address Initial Sym.Val. Type Ndx Name\n"; 5795 for (auto &E : Parser.getPltEntries()) { 5796 const Elf_Sym *Sym = Parser.getPltSym(&E); 5797 std::string SymName = this->dumper()->getFullSymbolName( 5798 Sym, this->dumper()->getDynamicStringTable(), false); 5799 5800 OS.PadToColumn(2); 5801 OS << to_string(format_hex_no_prefix(Parser.getPltAddress(&E), 8 + Bias)); 5802 OS.PadToColumn(11 + Bias); 5803 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5804 OS.PadToColumn(20 + 2 * Bias); 5805 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5806 OS.PadToColumn(29 + 3 * Bias); 5807 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5808 OS.PadToColumn(37 + 3 * Bias); 5809 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5810 this->dumper()->dynamic_symbols().begin()); 5811 OS.PadToColumn(41 + 3 * Bias); 5812 OS << SymName << "\n"; 5813 } 5814 } 5815 } 5816 5817 template <class ELFT> 5818 void GNUStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 5819 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 5820 const Elf_Shdr *Shdr = 5821 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 5822 if (!Shdr) 5823 return; 5824 5825 ArrayRef<uint8_t> Sec = 5826 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 5827 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) 5828 reportError(createError(".MIPS.abiflags section has a wrong size"), 5829 ObjF->getFileName()); 5830 5831 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 5832 5833 OS << "MIPS ABI Flags Version: " << Flags->version << "\n\n"; 5834 OS << "ISA: MIPS" << int(Flags->isa_level); 5835 if (Flags->isa_rev > 1) 5836 OS << "r" << int(Flags->isa_rev); 5837 OS << "\n"; 5838 OS << "GPR size: " << getMipsRegisterSize(Flags->gpr_size) << "\n"; 5839 OS << "CPR1 size: " << getMipsRegisterSize(Flags->cpr1_size) << "\n"; 5840 OS << "CPR2 size: " << getMipsRegisterSize(Flags->cpr2_size) << "\n"; 5841 OS << "FP ABI: " << printEnum(Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)) 5842 << "\n"; 5843 OS << "ISA Extension: " 5844 << printEnum(Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)) << "\n"; 5845 if (Flags->ases == 0) 5846 OS << "ASEs: None\n"; 5847 else 5848 // FIXME: Print each flag on a separate line. 5849 OS << "ASEs: " << printFlags(Flags->ases, makeArrayRef(ElfMipsASEFlags)) 5850 << "\n"; 5851 OS << "FLAGS 1: " << format_hex_no_prefix(Flags->flags1, 8, false) << "\n"; 5852 OS << "FLAGS 2: " << format_hex_no_prefix(Flags->flags2, 8, false) << "\n"; 5853 OS << "\n"; 5854 } 5855 5856 template <class ELFT> void LLVMStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 5857 const Elf_Ehdr *E = Obj->getHeader(); 5858 { 5859 DictScope D(W, "ElfHeader"); 5860 { 5861 DictScope D(W, "Ident"); 5862 W.printBinary("Magic", makeArrayRef(E->e_ident).slice(ELF::EI_MAG0, 4)); 5863 W.printEnum("Class", E->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 5864 W.printEnum("DataEncoding", E->e_ident[ELF::EI_DATA], 5865 makeArrayRef(ElfDataEncoding)); 5866 W.printNumber("FileVersion", E->e_ident[ELF::EI_VERSION]); 5867 5868 auto OSABI = makeArrayRef(ElfOSABI); 5869 if (E->e_ident[ELF::EI_OSABI] >= ELF::ELFOSABI_FIRST_ARCH && 5870 E->e_ident[ELF::EI_OSABI] <= ELF::ELFOSABI_LAST_ARCH) { 5871 switch (E->e_machine) { 5872 case ELF::EM_AMDGPU: 5873 OSABI = makeArrayRef(AMDGPUElfOSABI); 5874 break; 5875 case ELF::EM_ARM: 5876 OSABI = makeArrayRef(ARMElfOSABI); 5877 break; 5878 case ELF::EM_TI_C6000: 5879 OSABI = makeArrayRef(C6000ElfOSABI); 5880 break; 5881 } 5882 } 5883 W.printEnum("OS/ABI", E->e_ident[ELF::EI_OSABI], OSABI); 5884 W.printNumber("ABIVersion", E->e_ident[ELF::EI_ABIVERSION]); 5885 W.printBinary("Unused", makeArrayRef(E->e_ident).slice(ELF::EI_PAD)); 5886 } 5887 5888 W.printEnum("Type", E->e_type, makeArrayRef(ElfObjectFileType)); 5889 W.printEnum("Machine", E->e_machine, makeArrayRef(ElfMachineType)); 5890 W.printNumber("Version", E->e_version); 5891 W.printHex("Entry", E->e_entry); 5892 W.printHex("ProgramHeaderOffset", E->e_phoff); 5893 W.printHex("SectionHeaderOffset", E->e_shoff); 5894 if (E->e_machine == EM_MIPS) 5895 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderMipsFlags), 5896 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 5897 unsigned(ELF::EF_MIPS_MACH)); 5898 else if (E->e_machine == EM_AMDGPU) 5899 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderAMDGPUFlags), 5900 unsigned(ELF::EF_AMDGPU_MACH)); 5901 else if (E->e_machine == EM_RISCV) 5902 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 5903 else 5904 W.printFlags("Flags", E->e_flags); 5905 W.printNumber("HeaderSize", E->e_ehsize); 5906 W.printNumber("ProgramHeaderEntrySize", E->e_phentsize); 5907 W.printNumber("ProgramHeaderCount", E->e_phnum); 5908 W.printNumber("SectionHeaderEntrySize", E->e_shentsize); 5909 W.printString("SectionHeaderCount", 5910 getSectionHeadersNumString(Obj, this->FileName)); 5911 W.printString("StringTableSectionIndex", 5912 getSectionHeaderTableIndexString(Obj, this->FileName)); 5913 } 5914 } 5915 5916 template <class ELFT> 5917 void LLVMStyle<ELFT>::printGroupSections(const ELFO *Obj) { 5918 DictScope Lists(W, "Groups"); 5919 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 5920 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 5921 for (const GroupSection &G : V) { 5922 DictScope D(W, "Group"); 5923 W.printNumber("Name", G.Name, G.ShName); 5924 W.printNumber("Index", G.Index); 5925 W.printNumber("Link", G.Link); 5926 W.printNumber("Info", G.Info); 5927 W.printHex("Type", getGroupType(G.Type), G.Type); 5928 W.startLine() << "Signature: " << G.Signature << "\n"; 5929 5930 ListScope L(W, "Section(s) in group"); 5931 for (const GroupMember &GM : G.Members) { 5932 const GroupSection *MainGroup = Map[GM.Index]; 5933 if (MainGroup != &G) { 5934 W.flush(); 5935 errs() << "Error: " << GM.Name << " (" << GM.Index 5936 << ") in a group " + G.Name + " (" << G.Index 5937 << ") is already in a group " + MainGroup->Name + " (" 5938 << MainGroup->Index << ")\n"; 5939 errs().flush(); 5940 continue; 5941 } 5942 W.startLine() << GM.Name << " (" << GM.Index << ")\n"; 5943 } 5944 } 5945 5946 if (V.empty()) 5947 W.startLine() << "There are no group sections in the file.\n"; 5948 } 5949 5950 template <class ELFT> void LLVMStyle<ELFT>::printRelocations(const ELFO *Obj) { 5951 ListScope D(W, "Relocations"); 5952 5953 int SectionNumber = -1; 5954 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 5955 ++SectionNumber; 5956 5957 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 5958 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 5959 Sec.sh_type != ELF::SHT_ANDROID_RELA && 5960 Sec.sh_type != ELF::SHT_ANDROID_RELR) 5961 continue; 5962 5963 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 5964 5965 W.startLine() << "Section (" << SectionNumber << ") " << Name << " {\n"; 5966 W.indent(); 5967 5968 printRelocations(&Sec, Obj); 5969 5970 W.unindent(); 5971 W.startLine() << "}\n"; 5972 } 5973 } 5974 5975 template <class ELFT> 5976 void LLVMStyle<ELFT>::printRelocations(const Elf_Shdr *Sec, const ELFO *Obj) { 5977 const Elf_Shdr *SymTab = 5978 unwrapOrError(this->FileName, Obj->getSection(Sec->sh_link)); 5979 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 5980 unsigned RelNdx = 0; 5981 5982 switch (Sec->sh_type) { 5983 case ELF::SHT_REL: 5984 for (const Elf_Rel &R : unwrapOrError(this->FileName, Obj->rels(Sec))) { 5985 Elf_Rela Rela; 5986 Rela.r_offset = R.r_offset; 5987 Rela.r_info = R.r_info; 5988 Rela.r_addend = 0; 5989 printRelocation(Obj, SecNdx, Rela, ++RelNdx, SymTab); 5990 } 5991 break; 5992 case ELF::SHT_RELA: 5993 for (const Elf_Rela &R : unwrapOrError(this->FileName, Obj->relas(Sec))) 5994 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 5995 break; 5996 case ELF::SHT_RELR: 5997 case ELF::SHT_ANDROID_RELR: { 5998 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(Sec)); 5999 if (opts::RawRelr) { 6000 for (const Elf_Relr &R : Relrs) 6001 W.startLine() << W.hex(R) << "\n"; 6002 } else { 6003 std::vector<Elf_Rela> RelrRelas = 6004 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 6005 for (const Elf_Rela &R : RelrRelas) 6006 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6007 } 6008 break; 6009 } 6010 case ELF::SHT_ANDROID_REL: 6011 case ELF::SHT_ANDROID_RELA: 6012 for (const Elf_Rela &R : 6013 unwrapOrError(this->FileName, Obj->android_relas(Sec))) 6014 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6015 break; 6016 } 6017 } 6018 6019 template <class ELFT> 6020 void LLVMStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 6021 Elf_Rela Rel, unsigned RelIndex, 6022 const Elf_Shdr *SymTab) { 6023 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 6024 this->dumper()->getRelocationTarget(SymTab, Rel); 6025 if (!Target) { 6026 this->reportUniqueWarning(createError( 6027 "unable to print relocation " + Twine(RelIndex) + " in section " + 6028 Twine(SecIndex) + ": " + toString(Target.takeError()))); 6029 return; 6030 } 6031 6032 std::string TargetName = Target->second; 6033 SmallString<32> RelocName; 6034 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 6035 6036 if (opts::ExpandRelocs) { 6037 DictScope Group(W, "Relocation"); 6038 W.printHex("Offset", Rel.r_offset); 6039 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 6040 W.printNumber("Symbol", !TargetName.empty() ? TargetName : "-", 6041 Rel.getSymbol(Obj->isMips64EL())); 6042 W.printHex("Addend", Rel.r_addend); 6043 } else { 6044 raw_ostream &OS = W.startLine(); 6045 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 6046 << (!TargetName.empty() ? TargetName : "-") << " " << W.hex(Rel.r_addend) 6047 << "\n"; 6048 } 6049 } 6050 6051 template <class ELFT> 6052 void LLVMStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 6053 ListScope SectionsD(W, "Sections"); 6054 6055 int SectionIndex = -1; 6056 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 6057 std::vector<EnumEntry<unsigned>> FlagsList = 6058 getSectionFlagsForTarget(Obj->getHeader()->e_machine); 6059 for (const Elf_Shdr &Sec : Sections) { 6060 StringRef Name = "<?>"; 6061 if (Expected<StringRef> SecNameOrErr = 6062 Obj->getSectionName(&Sec, this->dumper()->WarningHandler)) 6063 Name = *SecNameOrErr; 6064 else 6065 this->reportUniqueWarning(SecNameOrErr.takeError()); 6066 6067 DictScope SectionD(W, "Section"); 6068 W.printNumber("Index", ++SectionIndex); 6069 W.printNumber("Name", Name, Sec.sh_name); 6070 W.printHex( 6071 "Type", 6072 object::getELFSectionTypeName(Obj->getHeader()->e_machine, Sec.sh_type), 6073 Sec.sh_type); 6074 W.printFlags("Flags", Sec.sh_flags, makeArrayRef(FlagsList)); 6075 W.printHex("Address", Sec.sh_addr); 6076 W.printHex("Offset", Sec.sh_offset); 6077 W.printNumber("Size", Sec.sh_size); 6078 W.printNumber("Link", Sec.sh_link); 6079 W.printNumber("Info", Sec.sh_info); 6080 W.printNumber("AddressAlignment", Sec.sh_addralign); 6081 W.printNumber("EntrySize", Sec.sh_entsize); 6082 6083 if (opts::SectionRelocations) { 6084 ListScope D(W, "Relocations"); 6085 printRelocations(&Sec, Obj); 6086 } 6087 6088 if (opts::SectionSymbols) { 6089 ListScope D(W, "Symbols"); 6090 const Elf_Shdr *Symtab = this->dumper()->getDotSymtabSec(); 6091 StringRef StrTable = 6092 unwrapOrError(this->FileName, Obj->getStringTableForSymtab(*Symtab)); 6093 6094 for (const Elf_Sym &Sym : 6095 unwrapOrError(this->FileName, Obj->symbols(Symtab))) { 6096 const Elf_Shdr *SymSec = unwrapOrError( 6097 this->FileName, 6098 Obj->getSection(&Sym, Symtab, this->dumper()->getShndxTable())); 6099 if (SymSec == &Sec) 6100 printSymbol( 6101 Obj, &Sym, 6102 unwrapOrError(this->FileName, Obj->symbols(Symtab)).begin(), 6103 StrTable, false, false); 6104 } 6105 } 6106 6107 if (opts::SectionData && Sec.sh_type != ELF::SHT_NOBITS) { 6108 ArrayRef<uint8_t> Data = 6109 unwrapOrError(this->FileName, Obj->getSectionContents(&Sec)); 6110 W.printBinaryBlock( 6111 "SectionData", 6112 StringRef(reinterpret_cast<const char *>(Data.data()), Data.size())); 6113 } 6114 } 6115 } 6116 6117 template <class ELFT> 6118 void LLVMStyle<ELFT>::printSymbolSection(const Elf_Sym *Symbol, 6119 const Elf_Sym *First) { 6120 Expected<unsigned> SectionIndex = 6121 this->dumper()->getSymbolSectionIndex(Symbol, First); 6122 if (!SectionIndex) { 6123 assert(Symbol->st_shndx == SHN_XINDEX && 6124 "getSymbolSectionIndex should only fail due to an invalid " 6125 "SHT_SYMTAB_SHNDX table/reference"); 6126 this->reportUniqueWarning(SectionIndex.takeError()); 6127 W.printHex("Section", "Reserved", SHN_XINDEX); 6128 return; 6129 } 6130 6131 Expected<StringRef> SectionName = 6132 this->dumper()->getSymbolSectionName(Symbol, *SectionIndex); 6133 if (!SectionName) { 6134 // Don't report an invalid section name if the section headers are missing. 6135 // In such situations, all sections will be "invalid". 6136 if (!this->dumper()->getElfObject()->sections().empty()) 6137 this->reportUniqueWarning(SectionName.takeError()); 6138 else 6139 consumeError(SectionName.takeError()); 6140 W.printHex("Section", "<?>", *SectionIndex); 6141 } else { 6142 W.printHex("Section", *SectionName, *SectionIndex); 6143 } 6144 } 6145 6146 template <class ELFT> 6147 void LLVMStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 6148 const Elf_Sym *First, StringRef StrTable, 6149 bool IsDynamic, 6150 bool /*NonVisibilityBitsUsed*/) { 6151 std::string FullSymbolName = 6152 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 6153 unsigned char SymbolType = Symbol->getType(); 6154 6155 DictScope D(W, "Symbol"); 6156 W.printNumber("Name", FullSymbolName, Symbol->st_name); 6157 W.printHex("Value", Symbol->st_value); 6158 W.printNumber("Size", Symbol->st_size); 6159 W.printEnum("Binding", Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 6160 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 6161 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 6162 W.printEnum("Type", SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 6163 else 6164 W.printEnum("Type", SymbolType, makeArrayRef(ElfSymbolTypes)); 6165 if (Symbol->st_other == 0) 6166 // Usually st_other flag is zero. Do not pollute the output 6167 // by flags enumeration in that case. 6168 W.printNumber("Other", 0); 6169 else { 6170 std::vector<EnumEntry<unsigned>> SymOtherFlags(std::begin(ElfSymOtherFlags), 6171 std::end(ElfSymOtherFlags)); 6172 if (Obj->getHeader()->e_machine == EM_MIPS) { 6173 // Someones in their infinite wisdom decided to make STO_MIPS_MIPS16 6174 // flag overlapped with other ST_MIPS_xxx flags. So consider both 6175 // cases separately. 6176 if ((Symbol->st_other & STO_MIPS_MIPS16) == STO_MIPS_MIPS16) 6177 SymOtherFlags.insert(SymOtherFlags.end(), 6178 std::begin(ElfMips16SymOtherFlags), 6179 std::end(ElfMips16SymOtherFlags)); 6180 else 6181 SymOtherFlags.insert(SymOtherFlags.end(), 6182 std::begin(ElfMipsSymOtherFlags), 6183 std::end(ElfMipsSymOtherFlags)); 6184 } 6185 W.printFlags("Other", Symbol->st_other, makeArrayRef(SymOtherFlags), 0x3u); 6186 } 6187 printSymbolSection(Symbol, First); 6188 } 6189 6190 template <class ELFT> 6191 void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 6192 bool PrintDynamicSymbols) { 6193 if (PrintSymbols) 6194 printSymbols(Obj); 6195 if (PrintDynamicSymbols) 6196 printDynamicSymbols(Obj); 6197 } 6198 6199 template <class ELFT> void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj) { 6200 ListScope Group(W, "Symbols"); 6201 this->dumper()->printSymbolsHelper(false); 6202 } 6203 6204 template <class ELFT> 6205 void LLVMStyle<ELFT>::printDynamicSymbols(const ELFO *Obj) { 6206 ListScope Group(W, "DynamicSymbols"); 6207 this->dumper()->printSymbolsHelper(true); 6208 } 6209 6210 template <class ELFT> void LLVMStyle<ELFT>::printDynamic(const ELFFile<ELFT> *Obj) { 6211 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 6212 if (Table.empty()) 6213 return; 6214 6215 W.startLine() << "DynamicSection [ (" << Table.size() << " entries)\n"; 6216 6217 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table); 6218 // The "Name/Value" column should be indented from the "Type" column by N 6219 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 6220 // space (1) = -3. 6221 W.startLine() << " Tag" << std::string(ELFT::Is64Bits ? 16 : 8, ' ') 6222 << "Type" << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 6223 6224 std::string ValueFmt = "%-" + std::to_string(MaxTagSize) + "s "; 6225 for (auto Entry : Table) { 6226 uintX_t Tag = Entry.getTag(); 6227 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 6228 W.startLine() << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10, true) 6229 << " " 6230 << format(ValueFmt.c_str(), 6231 Obj->getDynamicTagAsString(Tag).c_str()) 6232 << Value << "\n"; 6233 } 6234 W.startLine() << "]\n"; 6235 } 6236 6237 template <class ELFT> 6238 void LLVMStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 6239 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 6240 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 6241 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 6242 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 6243 if (DynRelRegion.Size && DynRelaRegion.Size) 6244 report_fatal_error("There are both REL and RELA dynamic relocations"); 6245 W.startLine() << "Dynamic Relocations {\n"; 6246 W.indent(); 6247 if (DynRelaRegion.Size > 0) 6248 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 6249 printDynamicRelocation(Obj, Rela); 6250 else 6251 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 6252 Elf_Rela Rela; 6253 Rela.r_offset = Rel.r_offset; 6254 Rela.r_info = Rel.r_info; 6255 Rela.r_addend = 0; 6256 printDynamicRelocation(Obj, Rela); 6257 } 6258 if (DynRelrRegion.Size > 0) { 6259 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 6260 std::vector<Elf_Rela> RelrRelas = 6261 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 6262 for (const Elf_Rela &Rela : RelrRelas) 6263 printDynamicRelocation(Obj, Rela); 6264 } 6265 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) 6266 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 6267 printDynamicRelocation(Obj, Rela); 6268 else 6269 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 6270 Elf_Rela Rela; 6271 Rela.r_offset = Rel.r_offset; 6272 Rela.r_info = Rel.r_info; 6273 Rela.r_addend = 0; 6274 printDynamicRelocation(Obj, Rela); 6275 } 6276 W.unindent(); 6277 W.startLine() << "}\n"; 6278 } 6279 6280 template <class ELFT> 6281 void LLVMStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel) { 6282 SmallString<32> RelocName; 6283 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 6284 std::string SymbolName = 6285 getSymbolForReloc(Obj, this->FileName, this->dumper(), Rel).Name; 6286 6287 if (opts::ExpandRelocs) { 6288 DictScope Group(W, "Relocation"); 6289 W.printHex("Offset", Rel.r_offset); 6290 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 6291 W.printString("Symbol", !SymbolName.empty() ? SymbolName : "-"); 6292 W.printHex("Addend", Rel.r_addend); 6293 } else { 6294 raw_ostream &OS = W.startLine(); 6295 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 6296 << (!SymbolName.empty() ? SymbolName : "-") << " " << W.hex(Rel.r_addend) 6297 << "\n"; 6298 } 6299 } 6300 6301 template <class ELFT> 6302 void LLVMStyle<ELFT>::printProgramHeaders( 6303 const ELFO *Obj, bool PrintProgramHeaders, 6304 cl::boolOrDefault PrintSectionMapping) { 6305 if (PrintProgramHeaders) 6306 printProgramHeaders(Obj); 6307 if (PrintSectionMapping == cl::BOU_TRUE) 6308 printSectionMapping(Obj); 6309 } 6310 6311 template <class ELFT> 6312 void LLVMStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 6313 ListScope L(W, "ProgramHeaders"); 6314 6315 for (const Elf_Phdr &Phdr : 6316 unwrapOrError(this->FileName, Obj->program_headers())) { 6317 DictScope P(W, "ProgramHeader"); 6318 W.printHex("Type", 6319 getElfSegmentType(Obj->getHeader()->e_machine, Phdr.p_type), 6320 Phdr.p_type); 6321 W.printHex("Offset", Phdr.p_offset); 6322 W.printHex("VirtualAddress", Phdr.p_vaddr); 6323 W.printHex("PhysicalAddress", Phdr.p_paddr); 6324 W.printNumber("FileSize", Phdr.p_filesz); 6325 W.printNumber("MemSize", Phdr.p_memsz); 6326 W.printFlags("Flags", Phdr.p_flags, makeArrayRef(ElfSegmentFlags)); 6327 W.printNumber("Alignment", Phdr.p_align); 6328 } 6329 } 6330 6331 template <class ELFT> 6332 void LLVMStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 6333 const Elf_Shdr *Sec) { 6334 ListScope SS(W, "VersionSymbols"); 6335 if (!Sec) 6336 return; 6337 6338 StringRef StrTable; 6339 ArrayRef<Elf_Sym> Syms; 6340 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 6341 this->dumper()->getVersionTable(Sec, &Syms, &StrTable); 6342 if (!VerTableOrErr) { 6343 this->reportUniqueWarning(VerTableOrErr.takeError()); 6344 return; 6345 } 6346 6347 if (StrTable.empty() || Syms.empty() || Syms.size() != VerTableOrErr->size()) 6348 return; 6349 6350 for (size_t I = 0, E = Syms.size(); I < E; ++I) { 6351 DictScope S(W, "Symbol"); 6352 W.printNumber("Version", (*VerTableOrErr)[I].vs_index & VERSYM_VERSION); 6353 W.printString("Name", this->dumper()->getFullSymbolName( 6354 &Syms[I], StrTable, /*IsDynamic=*/true)); 6355 } 6356 } 6357 6358 template <class ELFT> 6359 void LLVMStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 6360 const Elf_Shdr *Sec) { 6361 ListScope SD(W, "VersionDefinitions"); 6362 if (!Sec) 6363 return; 6364 6365 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 6366 if (!V) { 6367 this->reportUniqueWarning(V.takeError()); 6368 return; 6369 } 6370 6371 for (const VerDef &D : *V) { 6372 DictScope Def(W, "Definition"); 6373 W.printNumber("Version", D.Version); 6374 W.printFlags("Flags", D.Flags, makeArrayRef(SymVersionFlags)); 6375 W.printNumber("Index", D.Ndx); 6376 W.printNumber("Hash", D.Hash); 6377 W.printString("Name", D.Name.c_str()); 6378 W.printList( 6379 "Predecessors", D.AuxV, 6380 [](raw_ostream &OS, const VerdAux &Aux) { OS << Aux.Name.c_str(); }); 6381 } 6382 } 6383 6384 template <class ELFT> 6385 void LLVMStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 6386 const Elf_Shdr *Sec) { 6387 ListScope SD(W, "VersionRequirements"); 6388 if (!Sec) 6389 return; 6390 6391 Expected<std::vector<VerNeed>> V = 6392 this->dumper()->getVersionDependencies(Sec); 6393 if (!V) { 6394 this->reportUniqueWarning(V.takeError()); 6395 return; 6396 } 6397 6398 for (const VerNeed &VN : *V) { 6399 DictScope Entry(W, "Dependency"); 6400 W.printNumber("Version", VN.Version); 6401 W.printNumber("Count", VN.Cnt); 6402 W.printString("FileName", VN.File.c_str()); 6403 6404 ListScope L(W, "Entries"); 6405 for (const VernAux &Aux : VN.AuxV) { 6406 DictScope Entry(W, "Entry"); 6407 W.printNumber("Hash", Aux.Hash); 6408 W.printFlags("Flags", Aux.Flags, makeArrayRef(SymVersionFlags)); 6409 W.printNumber("Index", Aux.Other); 6410 W.printString("Name", Aux.Name.c_str()); 6411 } 6412 } 6413 } 6414 6415 template <class ELFT> 6416 void LLVMStyle<ELFT>::printHashHistogram(const ELFFile<ELFT> *Obj) { 6417 W.startLine() << "Hash Histogram not implemented!\n"; 6418 } 6419 6420 template <class ELFT> 6421 void LLVMStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 6422 ListScope L(W, "CGProfile"); 6423 if (!this->dumper()->getDotCGProfileSec()) 6424 return; 6425 auto CGProfile = unwrapOrError( 6426 this->FileName, Obj->template getSectionContentsAsArray<Elf_CGProfile>( 6427 this->dumper()->getDotCGProfileSec())); 6428 for (const Elf_CGProfile &CGPE : CGProfile) { 6429 DictScope D(W, "CGProfileEntry"); 6430 W.printNumber( 6431 "From", 6432 unwrapOrError(this->FileName, 6433 this->dumper()->getStaticSymbolName(CGPE.cgp_from)), 6434 CGPE.cgp_from); 6435 W.printNumber( 6436 "To", 6437 unwrapOrError(this->FileName, 6438 this->dumper()->getStaticSymbolName(CGPE.cgp_to)), 6439 CGPE.cgp_to); 6440 W.printNumber("Weight", CGPE.cgp_weight); 6441 } 6442 } 6443 6444 static Expected<std::vector<uint64_t>> toULEB128Array(ArrayRef<uint8_t> Data) { 6445 std::vector<uint64_t> Ret; 6446 const uint8_t *Cur = Data.begin(); 6447 const uint8_t *End = Data.end(); 6448 while (Cur != End) { 6449 unsigned Size; 6450 const char *Err; 6451 Ret.push_back(decodeULEB128(Cur, &Size, End, &Err)); 6452 if (Err) 6453 return createError(Err); 6454 Cur += Size; 6455 } 6456 return Ret; 6457 } 6458 6459 template <class ELFT> 6460 void LLVMStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 6461 ListScope L(W, "Addrsig"); 6462 if (!this->dumper()->getDotAddrsigSec()) 6463 return; 6464 ArrayRef<uint8_t> Contents = unwrapOrError( 6465 this->FileName, 6466 Obj->getSectionContents(this->dumper()->getDotAddrsigSec())); 6467 Expected<std::vector<uint64_t>> V = toULEB128Array(Contents); 6468 if (!V) { 6469 reportWarning(V.takeError(), this->FileName); 6470 return; 6471 } 6472 6473 for (uint64_t Sym : *V) { 6474 Expected<std::string> NameOrErr = this->dumper()->getStaticSymbolName(Sym); 6475 if (NameOrErr) { 6476 W.printNumber("Sym", *NameOrErr, Sym); 6477 continue; 6478 } 6479 reportWarning(NameOrErr.takeError(), this->FileName); 6480 W.printNumber("Sym", "<?>", Sym); 6481 } 6482 } 6483 6484 template <typename ELFT> 6485 static void printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc, 6486 ScopedPrinter &W) { 6487 switch (NoteType) { 6488 default: 6489 return; 6490 case ELF::NT_GNU_ABI_TAG: { 6491 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 6492 if (!AbiTag.IsValid) { 6493 W.printString("ABI", "<corrupt GNU_ABI_TAG>"); 6494 } else { 6495 W.printString("OS", AbiTag.OSName); 6496 W.printString("ABI", AbiTag.ABI); 6497 } 6498 break; 6499 } 6500 case ELF::NT_GNU_BUILD_ID: { 6501 W.printString("Build ID", getGNUBuildId(Desc)); 6502 break; 6503 } 6504 case ELF::NT_GNU_GOLD_VERSION: 6505 W.printString("Version", getGNUGoldVersion(Desc)); 6506 break; 6507 case ELF::NT_GNU_PROPERTY_TYPE_0: 6508 ListScope D(W, "Property"); 6509 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 6510 W.printString(Property); 6511 break; 6512 } 6513 } 6514 6515 static void printCoreNoteLLVMStyle(const CoreNote &Note, ScopedPrinter &W) { 6516 W.printNumber("Page Size", Note.PageSize); 6517 for (const CoreFileMapping &Mapping : Note.Mappings) { 6518 ListScope D(W, "Mapping"); 6519 W.printHex("Start", Mapping.Start); 6520 W.printHex("End", Mapping.End); 6521 W.printHex("Offset", Mapping.Offset); 6522 W.printString("Filename", Mapping.Filename); 6523 } 6524 } 6525 6526 template <class ELFT> 6527 void LLVMStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 6528 ListScope L(W, "Notes"); 6529 6530 auto PrintHeader = [&](Optional<StringRef> SecName, 6531 const typename ELFT::Off Offset, 6532 const typename ELFT::Addr Size) { 6533 W.printString("Name", SecName ? *SecName : "<?>"); 6534 W.printHex("Offset", Offset); 6535 W.printHex("Size", Size); 6536 }; 6537 6538 auto ProcessNote = [&](const Elf_Note &Note) { 6539 DictScope D2(W, "Note"); 6540 StringRef Name = Note.getName(); 6541 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 6542 Elf_Word Type = Note.getType(); 6543 6544 // Print the note owner/type. 6545 W.printString("Owner", Name); 6546 W.printHex("Data size", Descriptor.size()); 6547 if (Name == "GNU") { 6548 W.printString("Type", getGNUNoteTypeName(Type)); 6549 } else if (Name == "FreeBSD") { 6550 W.printString("Type", getFreeBSDNoteTypeName(Type)); 6551 } else if (Name == "AMD") { 6552 W.printString("Type", getAMDNoteTypeName(Type)); 6553 } else if (Name == "AMDGPU") { 6554 W.printString("Type", getAMDGPUNoteTypeName(Type)); 6555 } else { 6556 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 6557 ? getCoreNoteTypeName(Type) 6558 : getGenericNoteTypeName(Type); 6559 if (!NoteType.empty()) 6560 W.printString("Type", NoteType); 6561 else 6562 W.printString("Type", 6563 "Unknown (" + to_string(format_hex(Type, 10)) + ")"); 6564 } 6565 6566 // Print the description, or fallback to printing raw bytes for unknown 6567 // owners. 6568 if (Name == "GNU") { 6569 printGNUNoteLLVMStyle<ELFT>(Type, Descriptor, W); 6570 } else if (Name == "AMD") { 6571 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 6572 if (!N.Type.empty()) 6573 W.printString(N.Type, N.Value); 6574 } else if (Name == "AMDGPU") { 6575 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 6576 if (!N.Type.empty()) 6577 W.printString(N.Type, N.Value); 6578 } else if (Name == "CORE") { 6579 if (Type == ELF::NT_FILE) { 6580 DataExtractor DescExtractor(Descriptor, 6581 ELFT::TargetEndianness == support::little, 6582 sizeof(Elf_Addr)); 6583 Expected<CoreNote> Note = readCoreNote(DescExtractor); 6584 if (Note) 6585 printCoreNoteLLVMStyle(*Note, W); 6586 else 6587 reportWarning(Note.takeError(), this->FileName); 6588 } 6589 } else if (!Descriptor.empty()) { 6590 W.printBinaryBlock("Description data", Descriptor); 6591 } 6592 }; 6593 6594 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 6595 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 6596 for (const auto &S : Sections) { 6597 if (S.sh_type != SHT_NOTE) 6598 continue; 6599 DictScope D(W, "NoteSection"); 6600 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 6601 S.sh_size); 6602 Error Err = Error::success(); 6603 for (auto Note : Obj->notes(S, Err)) 6604 ProcessNote(Note); 6605 if (Err) 6606 reportError(std::move(Err), this->FileName); 6607 } 6608 } else { 6609 for (const auto &P : 6610 unwrapOrError(this->FileName, Obj->program_headers())) { 6611 if (P.p_type != PT_NOTE) 6612 continue; 6613 DictScope D(W, "NoteSection"); 6614 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 6615 Error Err = Error::success(); 6616 for (auto Note : Obj->notes(P, Err)) 6617 ProcessNote(Note); 6618 if (Err) 6619 reportError(std::move(Err), this->FileName); 6620 } 6621 } 6622 } 6623 6624 template <class ELFT> 6625 void LLVMStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 6626 ListScope L(W, "LinkerOptions"); 6627 6628 unsigned I = -1; 6629 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 6630 ++I; 6631 if (Shdr.sh_type != ELF::SHT_LLVM_LINKER_OPTIONS) 6632 continue; 6633 6634 ArrayRef<uint8_t> Contents = 6635 unwrapOrError(this->FileName, Obj->getSectionContents(&Shdr)); 6636 if (Contents.empty()) 6637 continue; 6638 6639 if (Contents.back() != 0) { 6640 reportWarning(createError("SHT_LLVM_LINKER_OPTIONS section at index " + 6641 Twine(I) + 6642 " is broken: the " 6643 "content is not null-terminated"), 6644 this->FileName); 6645 continue; 6646 } 6647 6648 SmallVector<StringRef, 16> Strings; 6649 toStringRef(Contents.drop_back()).split(Strings, '\0'); 6650 if (Strings.size() % 2 != 0) { 6651 reportWarning( 6652 createError( 6653 "SHT_LLVM_LINKER_OPTIONS section at index " + Twine(I) + 6654 " is broken: an incomplete " 6655 "key-value pair was found. The last possible key was: \"" + 6656 Strings.back() + "\""), 6657 this->FileName); 6658 continue; 6659 } 6660 6661 for (size_t I = 0; I < Strings.size(); I += 2) 6662 W.printString(Strings[I], Strings[I + 1]); 6663 } 6664 } 6665 6666 template <class ELFT> 6667 void LLVMStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 6668 ListScope L(W, "DependentLibs"); 6669 this->printDependentLibsHelper( 6670 Obj, [](const Elf_Shdr &) {}, 6671 [this](StringRef Lib, uint64_t) { W.printString(Lib); }); 6672 } 6673 6674 template <class ELFT> 6675 void LLVMStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 6676 ListScope L(W, "StackSizes"); 6677 if (Obj->isRelocatableObject()) 6678 this->printRelocatableStackSizes(Obj, []() {}); 6679 else 6680 this->printNonRelocatableStackSizes(Obj, []() {}); 6681 } 6682 6683 template <class ELFT> 6684 void LLVMStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 6685 DictScope D(W, "Entry"); 6686 W.printString("Function", FuncName); 6687 W.printHex("Size", Size); 6688 } 6689 6690 template <class ELFT> 6691 void LLVMStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 6692 auto PrintEntry = [&](const Elf_Addr *E) { 6693 W.printHex("Address", Parser.getGotAddress(E)); 6694 W.printNumber("Access", Parser.getGotOffset(E)); 6695 W.printHex("Initial", *E); 6696 }; 6697 6698 DictScope GS(W, Parser.IsStatic ? "Static GOT" : "Primary GOT"); 6699 6700 W.printHex("Canonical gp value", Parser.getGp()); 6701 { 6702 ListScope RS(W, "Reserved entries"); 6703 { 6704 DictScope D(W, "Entry"); 6705 PrintEntry(Parser.getGotLazyResolver()); 6706 W.printString("Purpose", StringRef("Lazy resolver")); 6707 } 6708 6709 if (Parser.getGotModulePointer()) { 6710 DictScope D(W, "Entry"); 6711 PrintEntry(Parser.getGotModulePointer()); 6712 W.printString("Purpose", StringRef("Module pointer (GNU extension)")); 6713 } 6714 } 6715 { 6716 ListScope LS(W, "Local entries"); 6717 for (auto &E : Parser.getLocalEntries()) { 6718 DictScope D(W, "Entry"); 6719 PrintEntry(&E); 6720 } 6721 } 6722 6723 if (Parser.IsStatic) 6724 return; 6725 6726 { 6727 ListScope GS(W, "Global entries"); 6728 for (auto &E : Parser.getGlobalEntries()) { 6729 DictScope D(W, "Entry"); 6730 6731 PrintEntry(&E); 6732 6733 const Elf_Sym *Sym = Parser.getGotSym(&E); 6734 W.printHex("Value", Sym->st_value); 6735 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6736 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6737 6738 std::string SymName = this->dumper()->getFullSymbolName( 6739 Sym, this->dumper()->getDynamicStringTable(), true); 6740 W.printNumber("Name", SymName, Sym->st_name); 6741 } 6742 } 6743 6744 W.printNumber("Number of TLS and multi-GOT entries", 6745 uint64_t(Parser.getOtherEntries().size())); 6746 } 6747 6748 template <class ELFT> 6749 void LLVMStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 6750 auto PrintEntry = [&](const Elf_Addr *E) { 6751 W.printHex("Address", Parser.getPltAddress(E)); 6752 W.printHex("Initial", *E); 6753 }; 6754 6755 DictScope GS(W, "PLT GOT"); 6756 6757 { 6758 ListScope RS(W, "Reserved entries"); 6759 { 6760 DictScope D(W, "Entry"); 6761 PrintEntry(Parser.getPltLazyResolver()); 6762 W.printString("Purpose", StringRef("PLT lazy resolver")); 6763 } 6764 6765 if (auto E = Parser.getPltModulePointer()) { 6766 DictScope D(W, "Entry"); 6767 PrintEntry(E); 6768 W.printString("Purpose", StringRef("Module pointer")); 6769 } 6770 } 6771 { 6772 ListScope LS(W, "Entries"); 6773 for (auto &E : Parser.getPltEntries()) { 6774 DictScope D(W, "Entry"); 6775 PrintEntry(&E); 6776 6777 const Elf_Sym *Sym = Parser.getPltSym(&E); 6778 W.printHex("Value", Sym->st_value); 6779 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6780 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6781 6782 std::string SymName = 6783 this->dumper()->getFullSymbolName(Sym, Parser.getPltStrTable(), true); 6784 W.printNumber("Name", SymName, Sym->st_name); 6785 } 6786 } 6787 } 6788 6789 template <class ELFT> 6790 void LLVMStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 6791 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 6792 const Elf_Shdr *Shdr = 6793 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 6794 if (!Shdr) { 6795 W.startLine() << "There is no .MIPS.abiflags section in the file.\n"; 6796 return; 6797 } 6798 ArrayRef<uint8_t> Sec = 6799 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 6800 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) { 6801 W.startLine() << "The .MIPS.abiflags section has a wrong size.\n"; 6802 return; 6803 } 6804 6805 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 6806 6807 raw_ostream &OS = W.getOStream(); 6808 DictScope GS(W, "MIPS ABI Flags"); 6809 6810 W.printNumber("Version", Flags->version); 6811 W.startLine() << "ISA: "; 6812 if (Flags->isa_rev <= 1) 6813 OS << format("MIPS%u", Flags->isa_level); 6814 else 6815 OS << format("MIPS%ur%u", Flags->isa_level, Flags->isa_rev); 6816 OS << "\n"; 6817 W.printEnum("ISA Extension", Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)); 6818 W.printFlags("ASEs", Flags->ases, makeArrayRef(ElfMipsASEFlags)); 6819 W.printEnum("FP ABI", Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)); 6820 W.printNumber("GPR size", getMipsRegisterSize(Flags->gpr_size)); 6821 W.printNumber("CPR1 size", getMipsRegisterSize(Flags->cpr1_size)); 6822 W.printNumber("CPR2 size", getMipsRegisterSize(Flags->cpr2_size)); 6823 W.printFlags("Flags 1", Flags->flags1, makeArrayRef(ElfMipsFlags1)); 6824 W.printHex("Flags 2", Flags->flags2); 6825 } 6826