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