1 //===- ELFDumper.cpp - ELF-specific dumper --------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// This file implements the ELF-specific dumper for llvm-readobj. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "ARMEHABIPrinter.h" 15 #include "DwarfCFIEHPrinter.h" 16 #include "Error.h" 17 #include "ObjDumper.h" 18 #include "StackMapPrinter.h" 19 #include "llvm-readobj.h" 20 #include "llvm/ADT/ArrayRef.h" 21 #include "llvm/ADT/DenseMap.h" 22 #include "llvm/ADT/DenseSet.h" 23 #include "llvm/ADT/MapVector.h" 24 #include "llvm/ADT/Optional.h" 25 #include "llvm/ADT/PointerIntPair.h" 26 #include "llvm/ADT/STLExtras.h" 27 #include "llvm/ADT/SmallString.h" 28 #include "llvm/ADT/SmallVector.h" 29 #include "llvm/ADT/StringExtras.h" 30 #include "llvm/ADT/StringRef.h" 31 #include "llvm/ADT/Twine.h" 32 #include "llvm/BinaryFormat/AMDGPUMetadataVerifier.h" 33 #include "llvm/BinaryFormat/ELF.h" 34 #include "llvm/Demangle/Demangle.h" 35 #include "llvm/Object/ELF.h" 36 #include "llvm/Object/ELFObjectFile.h" 37 #include "llvm/Object/ELFTypes.h" 38 #include "llvm/Object/Error.h" 39 #include "llvm/Object/ObjectFile.h" 40 #include "llvm/Object/RelocationResolver.h" 41 #include "llvm/Object/StackMapParser.h" 42 #include "llvm/Support/AMDGPUMetadata.h" 43 #include "llvm/Support/ARMAttributeParser.h" 44 #include "llvm/Support/ARMBuildAttributes.h" 45 #include "llvm/Support/Casting.h" 46 #include "llvm/Support/Compiler.h" 47 #include "llvm/Support/Endian.h" 48 #include "llvm/Support/ErrorHandling.h" 49 #include "llvm/Support/Format.h" 50 #include "llvm/Support/FormatVariadic.h" 51 #include "llvm/Support/FormattedStream.h" 52 #include "llvm/Support/LEB128.h" 53 #include "llvm/Support/MathExtras.h" 54 #include "llvm/Support/MipsABIFlags.h" 55 #include "llvm/Support/RISCVAttributeParser.h" 56 #include "llvm/Support/RISCVAttributes.h" 57 #include "llvm/Support/ScopedPrinter.h" 58 #include "llvm/Support/raw_ostream.h" 59 #include <algorithm> 60 #include <cinttypes> 61 #include <cstddef> 62 #include <cstdint> 63 #include <cstdlib> 64 #include <iterator> 65 #include <memory> 66 #include <string> 67 #include <system_error> 68 #include <unordered_set> 69 #include <vector> 70 71 using namespace llvm; 72 using namespace llvm::object; 73 using namespace ELF; 74 75 #define LLVM_READOBJ_ENUM_CASE(ns, enum) \ 76 case ns::enum: \ 77 return #enum; 78 79 #define ENUM_ENT(enum, altName) \ 80 { #enum, altName, ELF::enum } 81 82 #define ENUM_ENT_1(enum) \ 83 { #enum, #enum, ELF::enum } 84 85 #define LLVM_READOBJ_PHDR_ENUM(ns, enum) \ 86 case ns::enum: \ 87 return std::string(#enum).substr(3); 88 89 #define TYPEDEF_ELF_TYPES(ELFT) \ 90 using ELFO = ELFFile<ELFT>; \ 91 using Elf_Addr = typename ELFT::Addr; \ 92 using Elf_Shdr = typename ELFT::Shdr; \ 93 using Elf_Sym = typename ELFT::Sym; \ 94 using Elf_Dyn = typename ELFT::Dyn; \ 95 using Elf_Dyn_Range = typename ELFT::DynRange; \ 96 using Elf_Rel = typename ELFT::Rel; \ 97 using Elf_Rela = typename ELFT::Rela; \ 98 using Elf_Relr = typename ELFT::Relr; \ 99 using Elf_Rel_Range = typename ELFT::RelRange; \ 100 using Elf_Rela_Range = typename ELFT::RelaRange; \ 101 using Elf_Relr_Range = typename ELFT::RelrRange; \ 102 using Elf_Phdr = typename ELFT::Phdr; \ 103 using Elf_Half = typename ELFT::Half; \ 104 using Elf_Ehdr = typename ELFT::Ehdr; \ 105 using Elf_Word = typename ELFT::Word; \ 106 using Elf_Hash = typename ELFT::Hash; \ 107 using Elf_GnuHash = typename ELFT::GnuHash; \ 108 using Elf_Note = typename ELFT::Note; \ 109 using Elf_Sym_Range = typename ELFT::SymRange; \ 110 using Elf_Versym = typename ELFT::Versym; \ 111 using Elf_Verneed = typename ELFT::Verneed; \ 112 using Elf_Vernaux = typename ELFT::Vernaux; \ 113 using Elf_Verdef = typename ELFT::Verdef; \ 114 using Elf_Verdaux = typename ELFT::Verdaux; \ 115 using Elf_CGProfile = typename ELFT::CGProfile; \ 116 using uintX_t = typename ELFT::uint; 117 118 namespace { 119 120 template <class ELFT> class DumpStyle; 121 122 /// Represents a contiguous uniform range in the file. We cannot just create a 123 /// range directly because when creating one of these from the .dynamic table 124 /// the size, entity size and virtual address are different entries in arbitrary 125 /// order (DT_REL, DT_RELSZ, DT_RELENT for example). 126 struct DynRegionInfo { 127 DynRegionInfo(StringRef ObjName) : FileName(ObjName) {} 128 DynRegionInfo(const void *A, uint64_t S, uint64_t ES, StringRef ObjName) 129 : Addr(A), Size(S), EntSize(ES), FileName(ObjName) {} 130 131 /// Address in current address space. 132 const void *Addr = nullptr; 133 /// Size in bytes of the region. 134 uint64_t Size = 0; 135 /// Size of each entity in the region. 136 uint64_t EntSize = 0; 137 138 /// Name of the file. Used for error reporting. 139 StringRef FileName; 140 /// Error prefix. Used for error reporting to provide more information. 141 std::string Context; 142 /// Region size name. Used for error reporting. 143 StringRef SizePrintName = "size"; 144 /// Entry size name. Used for error reporting. If this field is empty, errors 145 /// will not mention the entry size. 146 StringRef EntSizePrintName = "entry size"; 147 148 template <typename Type> ArrayRef<Type> getAsArrayRef() const { 149 const Type *Start = reinterpret_cast<const Type *>(Addr); 150 if (!Start) 151 return {Start, Start}; 152 if (EntSize == sizeof(Type) && (Size % EntSize == 0)) 153 return {Start, Start + (Size / EntSize)}; 154 155 std::string Msg; 156 if (!Context.empty()) 157 Msg += Context + " has "; 158 159 Msg += ("invalid " + SizePrintName + " (0x" + Twine::utohexstr(Size) + ")") 160 .str(); 161 if (!EntSizePrintName.empty()) 162 Msg += 163 (" or " + EntSizePrintName + " (0x" + Twine::utohexstr(EntSize) + ")") 164 .str(); 165 166 reportWarning(createError(Msg.c_str()), FileName); 167 return {Start, Start}; 168 } 169 }; 170 171 namespace { 172 struct VerdAux { 173 unsigned Offset; 174 std::string Name; 175 }; 176 177 struct VerDef { 178 unsigned Offset; 179 unsigned Version; 180 unsigned Flags; 181 unsigned Ndx; 182 unsigned Cnt; 183 unsigned Hash; 184 std::string Name; 185 std::vector<VerdAux> AuxV; 186 }; 187 188 struct VernAux { 189 unsigned Hash; 190 unsigned Flags; 191 unsigned Other; 192 unsigned Offset; 193 std::string Name; 194 }; 195 196 struct VerNeed { 197 unsigned Version; 198 unsigned Cnt; 199 unsigned Offset; 200 std::string File; 201 std::vector<VernAux> AuxV; 202 }; 203 204 } // namespace 205 206 template <typename ELFT> class ELFDumper : public ObjDumper { 207 public: 208 ELFDumper(const object::ELFObjectFile<ELFT> *ObjF, ScopedPrinter &Writer); 209 210 void printFileHeaders() override; 211 void printSectionHeaders() override; 212 void printRelocations() override; 213 void printDependentLibs() override; 214 void printDynamicRelocations() override; 215 void printSymbols(bool PrintSymbols, bool PrintDynamicSymbols) override; 216 void printHashSymbols() override; 217 void printUnwindInfo() override; 218 219 void printDynamicTable() override; 220 void printNeededLibraries() override; 221 void printProgramHeaders(bool PrintProgramHeaders, 222 cl::boolOrDefault PrintSectionMapping) override; 223 void printHashTable() override; 224 void printGnuHashTable(const object::ObjectFile *Obj) override; 225 void printLoadName() override; 226 void printVersionInfo() override; 227 void printGroupSections() override; 228 229 void printArchSpecificInfo() override; 230 231 void printStackMap() const override; 232 233 void printHashHistograms() override; 234 235 void printCGProfile() override; 236 void printAddrsig() override; 237 238 void printNotes() override; 239 240 void printELFLinkerOptions() override; 241 void printStackSizes() override; 242 243 const object::ELFObjectFile<ELFT> *getElfObject() const { return ObjF; }; 244 245 private: 246 std::unique_ptr<DumpStyle<ELFT>> ELFDumperStyle; 247 248 TYPEDEF_ELF_TYPES(ELFT) 249 250 DynRegionInfo checkDRI(DynRegionInfo DRI) { 251 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 252 if (DRI.Addr < Obj->base() || 253 reinterpret_cast<const uint8_t *>(DRI.Addr) + DRI.Size > 254 Obj->base() + Obj->getBufSize()) 255 reportError(errorCodeToError(llvm::object::object_error::parse_failed), 256 ObjF->getFileName()); 257 return DRI; 258 } 259 260 DynRegionInfo createDRIFrom(const Elf_Phdr *P, uintX_t EntSize) { 261 return checkDRI({ObjF->getELFFile()->base() + P->p_offset, P->p_filesz, 262 EntSize, ObjF->getFileName()}); 263 } 264 265 DynRegionInfo createDRIFrom(const Elf_Shdr *S) { 266 return checkDRI({ObjF->getELFFile()->base() + S->sh_offset, S->sh_size, 267 S->sh_entsize, ObjF->getFileName()}); 268 } 269 270 void printAttributes(); 271 void printMipsReginfo(); 272 void printMipsOptions(); 273 274 std::pair<const Elf_Phdr *, const Elf_Shdr *> 275 findDynamic(const ELFFile<ELFT> *Obj); 276 void loadDynamicTable(const ELFFile<ELFT> *Obj); 277 void parseDynamicTable(const ELFFile<ELFT> *Obj); 278 279 Expected<StringRef> getSymbolVersion(const Elf_Sym *symb, 280 bool &IsDefault) const; 281 Error LoadVersionMap() const; 282 283 const object::ELFObjectFile<ELFT> *ObjF; 284 DynRegionInfo DynRelRegion; 285 DynRegionInfo DynRelaRegion; 286 DynRegionInfo DynRelrRegion; 287 DynRegionInfo DynPLTRelRegion; 288 Optional<DynRegionInfo> DynSymRegion; 289 DynRegionInfo DynamicTable; 290 StringRef DynamicStringTable; 291 StringRef SOName = "<Not found>"; 292 const Elf_Hash *HashTable = nullptr; 293 const Elf_GnuHash *GnuHashTable = nullptr; 294 const Elf_Shdr *DotSymtabSec = nullptr; 295 const Elf_Shdr *DotCGProfileSec = nullptr; 296 const Elf_Shdr *DotAddrsigSec = nullptr; 297 StringRef DynSymtabName; 298 ArrayRef<Elf_Word> ShndxTable; 299 300 const Elf_Shdr *SymbolVersionSection = nullptr; // .gnu.version 301 const Elf_Shdr *SymbolVersionNeedSection = nullptr; // .gnu.version_r 302 const Elf_Shdr *SymbolVersionDefSection = nullptr; // .gnu.version_d 303 304 struct VersionEntry { 305 std::string Name; 306 bool IsVerDef; 307 }; 308 mutable SmallVector<Optional<VersionEntry>, 16> VersionMap; 309 310 std::unordered_set<std::string> Warnings; 311 312 public: 313 Elf_Dyn_Range dynamic_table() const { 314 // A valid .dynamic section contains an array of entries terminated 315 // with a DT_NULL entry. However, sometimes the section content may 316 // continue past the DT_NULL entry, so to dump the section correctly, 317 // we first find the end of the entries by iterating over them. 318 Elf_Dyn_Range Table = DynamicTable.getAsArrayRef<Elf_Dyn>(); 319 320 size_t Size = 0; 321 while (Size < Table.size()) 322 if (Table[Size++].getTag() == DT_NULL) 323 break; 324 325 return Table.slice(0, Size); 326 } 327 328 Optional<DynRegionInfo> getDynSymRegion() const { return DynSymRegion; } 329 330 Elf_Sym_Range dynamic_symbols() const { 331 if (!DynSymRegion) 332 return Elf_Sym_Range(); 333 return DynSymRegion->getAsArrayRef<Elf_Sym>(); 334 } 335 336 Elf_Rel_Range dyn_rels() const; 337 Elf_Rela_Range dyn_relas() const; 338 Elf_Relr_Range dyn_relrs() const; 339 std::string getFullSymbolName(const Elf_Sym *Symbol, StringRef StrTable, 340 bool IsDynamic) const; 341 Expected<unsigned> getSymbolSectionIndex(const Elf_Sym *Symbol, 342 const Elf_Sym *FirstSym) const; 343 Expected<StringRef> getSymbolSectionName(const Elf_Sym *Symbol, 344 unsigned SectionIndex) const; 345 Expected<std::string> getStaticSymbolName(uint32_t Index) const; 346 StringRef getDynamicString(uint64_t Value) const; 347 Expected<StringRef> getSymbolVersionByIndex(uint32_t VersionSymbolIndex, 348 bool &IsDefault) const; 349 350 void printSymbolsHelper(bool IsDynamic) const; 351 std::string getDynamicEntry(uint64_t Type, uint64_t Value) const; 352 353 const Elf_Shdr *getDotSymtabSec() const { return DotSymtabSec; } 354 const Elf_Shdr *getDotCGProfileSec() const { return DotCGProfileSec; } 355 const Elf_Shdr *getDotAddrsigSec() const { return DotAddrsigSec; } 356 ArrayRef<Elf_Word> getShndxTable() const { return ShndxTable; } 357 StringRef getDynamicStringTable() const { return DynamicStringTable; } 358 const DynRegionInfo &getDynRelRegion() const { return DynRelRegion; } 359 const DynRegionInfo &getDynRelaRegion() const { return DynRelaRegion; } 360 const DynRegionInfo &getDynRelrRegion() const { return DynRelrRegion; } 361 const DynRegionInfo &getDynPLTRelRegion() const { return DynPLTRelRegion; } 362 const DynRegionInfo &getDynamicTableRegion() const { return DynamicTable; } 363 const Elf_Hash *getHashTable() const { return HashTable; } 364 const Elf_GnuHash *getGnuHashTable() const { return GnuHashTable; } 365 366 Expected<ArrayRef<Elf_Versym>> getVersionTable(const Elf_Shdr *Sec, 367 ArrayRef<Elf_Sym> *SymTab, 368 StringRef *StrTab) const; 369 Expected<std::vector<VerDef>> 370 getVersionDefinitions(const Elf_Shdr *Sec) const; 371 Expected<std::vector<VerNeed>> 372 getVersionDependencies(const Elf_Shdr *Sec) const; 373 374 Expected<std::pair<const Elf_Sym *, std::string>> 375 getRelocationTarget(const Elf_Shdr *SymTab, const Elf_Rela &R) const; 376 377 std::function<Error(const Twine &Msg)> WarningHandler; 378 void reportUniqueWarning(Error Err) const; 379 }; 380 381 template <class ELFT> 382 static Expected<StringRef> getLinkAsStrtab(const ELFFile<ELFT> *Obj, 383 const typename ELFT::Shdr *Sec, 384 unsigned SecNdx) { 385 Expected<const typename ELFT::Shdr *> StrTabSecOrErr = 386 Obj->getSection(Sec->sh_link); 387 if (!StrTabSecOrErr) 388 return createError("invalid section linked to " + 389 object::getELFSectionTypeName( 390 Obj->getHeader()->e_machine, Sec->sh_type) + 391 " section with index " + Twine(SecNdx) + ": " + 392 toString(StrTabSecOrErr.takeError())); 393 394 Expected<StringRef> StrTabOrErr = Obj->getStringTable(*StrTabSecOrErr); 395 if (!StrTabOrErr) 396 return createError("invalid string table linked to " + 397 object::getELFSectionTypeName( 398 Obj->getHeader()->e_machine, Sec->sh_type) + 399 " section with index " + Twine(SecNdx) + ": " + 400 toString(StrTabOrErr.takeError())); 401 return *StrTabOrErr; 402 } 403 404 // Returns the linked symbol table and associated string table for a given section. 405 template <class ELFT> 406 static Expected<std::pair<typename ELFT::SymRange, StringRef>> 407 getLinkAsSymtab(const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec, 408 unsigned SecNdx, unsigned ExpectedType) { 409 Expected<const typename ELFT::Shdr *> SymtabOrErr = 410 Obj->getSection(Sec->sh_link); 411 if (!SymtabOrErr) 412 return createError("invalid section linked to " + 413 object::getELFSectionTypeName( 414 Obj->getHeader()->e_machine, Sec->sh_type) + 415 " section with index " + Twine(SecNdx) + ": " + 416 toString(SymtabOrErr.takeError())); 417 418 if ((*SymtabOrErr)->sh_type != ExpectedType) 419 return createError( 420 "invalid section linked to " + 421 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 422 Sec->sh_type) + 423 " section with index " + Twine(SecNdx) + ": expected " + 424 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 425 ExpectedType) + 426 ", but got " + 427 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 428 (*SymtabOrErr)->sh_type)); 429 430 Expected<StringRef> StrTabOrErr = 431 getLinkAsStrtab(Obj, *SymtabOrErr, Sec->sh_link); 432 if (!StrTabOrErr) 433 return createError( 434 "can't get a string table for the symbol table linked to " + 435 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 436 Sec->sh_type) + 437 " section with index " + Twine(SecNdx) + ": " + 438 toString(StrTabOrErr.takeError())); 439 440 Expected<typename ELFT::SymRange> SymsOrErr = Obj->symbols(*SymtabOrErr); 441 if (!SymsOrErr) 442 return createError( 443 "unable to read symbols from the symbol table with index " + 444 Twine(Sec->sh_link) + ": " + toString(SymsOrErr.takeError())); 445 446 return std::make_pair(*SymsOrErr, *StrTabOrErr); 447 } 448 449 template <class ELFT> 450 Expected<ArrayRef<typename ELFT::Versym>> 451 ELFDumper<ELFT>::getVersionTable(const Elf_Shdr *Sec, ArrayRef<Elf_Sym> *SymTab, 452 StringRef *StrTab) const { 453 assert((!SymTab && !StrTab) || (SymTab && StrTab)); 454 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 455 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 456 457 if (uintptr_t(Obj->base() + Sec->sh_offset) % sizeof(uint16_t) != 0) 458 return createError("the SHT_GNU_versym section with index " + 459 Twine(SecNdx) + " is misaligned"); 460 461 Expected<ArrayRef<Elf_Versym>> VersionsOrErr = 462 Obj->template getSectionContentsAsArray<Elf_Versym>(Sec); 463 if (!VersionsOrErr) 464 return createError( 465 "cannot read content of SHT_GNU_versym section with index " + 466 Twine(SecNdx) + ": " + toString(VersionsOrErr.takeError())); 467 468 Expected<std::pair<ArrayRef<Elf_Sym>, StringRef>> SymTabOrErr = 469 getLinkAsSymtab(Obj, Sec, SecNdx, SHT_DYNSYM); 470 if (!SymTabOrErr) { 471 reportUniqueWarning(SymTabOrErr.takeError()); 472 return *VersionsOrErr; 473 } 474 475 if (SymTabOrErr->first.size() != VersionsOrErr->size()) 476 reportUniqueWarning( 477 createError("SHT_GNU_versym section with index " + Twine(SecNdx) + 478 ": the number of entries (" + Twine(VersionsOrErr->size()) + 479 ") does not match the number of symbols (" + 480 Twine(SymTabOrErr->first.size()) + 481 ") in the symbol table with index " + Twine(Sec->sh_link))); 482 483 if (SymTab) 484 std::tie(*SymTab, *StrTab) = *SymTabOrErr; 485 return *VersionsOrErr; 486 } 487 488 template <class ELFT> 489 Expected<std::vector<VerDef>> 490 ELFDumper<ELFT>::getVersionDefinitions(const Elf_Shdr *Sec) const { 491 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 492 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 493 494 Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx); 495 if (!StrTabOrErr) 496 return StrTabOrErr.takeError(); 497 498 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec); 499 if (!ContentsOrErr) 500 return createError( 501 "cannot read content of SHT_GNU_verdef section with index " + 502 Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError())); 503 504 const uint8_t *Start = ContentsOrErr->data(); 505 const uint8_t *End = Start + ContentsOrErr->size(); 506 507 auto ExtractNextAux = [&](const uint8_t *&VerdauxBuf, 508 unsigned VerDefNdx) -> Expected<VerdAux> { 509 if (VerdauxBuf + sizeof(Elf_Verdaux) > End) 510 return createError("invalid SHT_GNU_verdef section with index " + 511 Twine(SecNdx) + ": version definition " + 512 Twine(VerDefNdx) + 513 " refers to an auxiliary entry that goes past the end " 514 "of the section"); 515 516 auto *Verdaux = reinterpret_cast<const Elf_Verdaux *>(VerdauxBuf); 517 VerdauxBuf += Verdaux->vda_next; 518 519 VerdAux Aux; 520 Aux.Offset = VerdauxBuf - Start; 521 if (Verdaux->vda_name <= StrTabOrErr->size()) 522 Aux.Name = std::string(StrTabOrErr->drop_front(Verdaux->vda_name)); 523 else 524 Aux.Name = "<invalid vda_name: " + to_string(Verdaux->vda_name) + ">"; 525 return Aux; 526 }; 527 528 std::vector<VerDef> Ret; 529 const uint8_t *VerdefBuf = Start; 530 for (unsigned I = 1; I <= /*VerDefsNum=*/Sec->sh_info; ++I) { 531 if (VerdefBuf + sizeof(Elf_Verdef) > End) 532 return createError("invalid SHT_GNU_verdef section with index " + 533 Twine(SecNdx) + ": version definition " + Twine(I) + 534 " goes past the end of the section"); 535 536 if (uintptr_t(VerdefBuf) % sizeof(uint32_t) != 0) 537 return createError( 538 "invalid SHT_GNU_verdef section with index " + Twine(SecNdx) + 539 ": found a misaligned version definition entry at offset 0x" + 540 Twine::utohexstr(VerdefBuf - Start)); 541 542 unsigned Version = *reinterpret_cast<const Elf_Half *>(VerdefBuf); 543 if (Version != 1) 544 return createError("unable to dump SHT_GNU_verdef section with index " + 545 Twine(SecNdx) + ": version " + Twine(Version) + 546 " is not yet supported"); 547 548 const Elf_Verdef *D = reinterpret_cast<const Elf_Verdef *>(VerdefBuf); 549 VerDef &VD = *Ret.emplace(Ret.end()); 550 VD.Offset = VerdefBuf - Start; 551 VD.Version = D->vd_version; 552 VD.Flags = D->vd_flags; 553 VD.Ndx = D->vd_ndx; 554 VD.Cnt = D->vd_cnt; 555 VD.Hash = D->vd_hash; 556 557 const uint8_t *VerdauxBuf = VerdefBuf + D->vd_aux; 558 for (unsigned J = 0; J < D->vd_cnt; ++J) { 559 if (uintptr_t(VerdauxBuf) % sizeof(uint32_t) != 0) 560 return createError("invalid SHT_GNU_verdef section with index " + 561 Twine(SecNdx) + 562 ": found a misaligned auxiliary entry at offset 0x" + 563 Twine::utohexstr(VerdauxBuf - Start)); 564 565 Expected<VerdAux> AuxOrErr = ExtractNextAux(VerdauxBuf, I); 566 if (!AuxOrErr) 567 return AuxOrErr.takeError(); 568 569 if (J == 0) 570 VD.Name = AuxOrErr->Name; 571 else 572 VD.AuxV.push_back(*AuxOrErr); 573 } 574 575 VerdefBuf += D->vd_next; 576 } 577 578 return Ret; 579 } 580 581 template <class ELFT> 582 Expected<std::vector<VerNeed>> 583 ELFDumper<ELFT>::getVersionDependencies(const Elf_Shdr *Sec) const { 584 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 585 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 586 587 StringRef StrTab; 588 Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx); 589 if (!StrTabOrErr) 590 reportUniqueWarning(StrTabOrErr.takeError()); 591 else 592 StrTab = *StrTabOrErr; 593 594 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec); 595 if (!ContentsOrErr) 596 return createError( 597 "cannot read content of SHT_GNU_verneed section with index " + 598 Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError())); 599 600 const uint8_t *Start = ContentsOrErr->data(); 601 const uint8_t *End = Start + ContentsOrErr->size(); 602 const uint8_t *VerneedBuf = Start; 603 604 std::vector<VerNeed> Ret; 605 for (unsigned I = 1; I <= /*VerneedNum=*/Sec->sh_info; ++I) { 606 if (VerneedBuf + sizeof(Elf_Verdef) > End) 607 return createError("invalid SHT_GNU_verneed section with index " + 608 Twine(SecNdx) + ": version dependency " + Twine(I) + 609 " goes past the end of the section"); 610 611 if (uintptr_t(VerneedBuf) % sizeof(uint32_t) != 0) 612 return createError( 613 "invalid SHT_GNU_verneed section with index " + Twine(SecNdx) + 614 ": found a misaligned version dependency entry at offset 0x" + 615 Twine::utohexstr(VerneedBuf - Start)); 616 617 unsigned Version = *reinterpret_cast<const Elf_Half *>(VerneedBuf); 618 if (Version != 1) 619 return createError("unable to dump SHT_GNU_verneed section with index " + 620 Twine(SecNdx) + ": version " + Twine(Version) + 621 " is not yet supported"); 622 623 const Elf_Verneed *Verneed = 624 reinterpret_cast<const Elf_Verneed *>(VerneedBuf); 625 626 VerNeed &VN = *Ret.emplace(Ret.end()); 627 VN.Version = Verneed->vn_version; 628 VN.Cnt = Verneed->vn_cnt; 629 VN.Offset = VerneedBuf - Start; 630 631 if (Verneed->vn_file < StrTab.size()) 632 VN.File = std::string(StrTab.drop_front(Verneed->vn_file)); 633 else 634 VN.File = "<corrupt vn_file: " + to_string(Verneed->vn_file) + ">"; 635 636 const uint8_t *VernauxBuf = VerneedBuf + Verneed->vn_aux; 637 for (unsigned J = 0; J < Verneed->vn_cnt; ++J) { 638 if (uintptr_t(VernauxBuf) % sizeof(uint32_t) != 0) 639 return createError("invalid SHT_GNU_verneed section with index " + 640 Twine(SecNdx) + 641 ": found a misaligned auxiliary entry at offset 0x" + 642 Twine::utohexstr(VernauxBuf - Start)); 643 644 if (VernauxBuf + sizeof(Elf_Vernaux) > End) 645 return createError( 646 "invalid SHT_GNU_verneed section with index " + Twine(SecNdx) + 647 ": version dependency " + Twine(I) + 648 " refers to an auxiliary entry that goes past the end " 649 "of the section"); 650 651 const Elf_Vernaux *Vernaux = 652 reinterpret_cast<const Elf_Vernaux *>(VernauxBuf); 653 654 VernAux &Aux = *VN.AuxV.emplace(VN.AuxV.end()); 655 Aux.Hash = Vernaux->vna_hash; 656 Aux.Flags = Vernaux->vna_flags; 657 Aux.Other = Vernaux->vna_other; 658 Aux.Offset = VernauxBuf - Start; 659 if (StrTab.size() <= Vernaux->vna_name) 660 Aux.Name = "<corrupt>"; 661 else 662 Aux.Name = std::string(StrTab.drop_front(Vernaux->vna_name)); 663 664 VernauxBuf += Vernaux->vna_next; 665 } 666 VerneedBuf += Verneed->vn_next; 667 } 668 return Ret; 669 } 670 671 template <class ELFT> 672 void ELFDumper<ELFT>::printSymbolsHelper(bool IsDynamic) const { 673 StringRef StrTable, SymtabName; 674 size_t Entries = 0; 675 Elf_Sym_Range Syms(nullptr, nullptr); 676 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 677 if (IsDynamic) { 678 StrTable = DynamicStringTable; 679 Syms = dynamic_symbols(); 680 SymtabName = DynSymtabName; 681 if (DynSymRegion) 682 Entries = DynSymRegion->Size / DynSymRegion->EntSize; 683 } else { 684 if (!DotSymtabSec) 685 return; 686 StrTable = unwrapOrError(ObjF->getFileName(), 687 Obj->getStringTableForSymtab(*DotSymtabSec)); 688 Syms = unwrapOrError(ObjF->getFileName(), Obj->symbols(DotSymtabSec)); 689 SymtabName = 690 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DotSymtabSec)); 691 Entries = DotSymtabSec->getEntityCount(); 692 } 693 if (Syms.begin() == Syms.end()) 694 return; 695 696 // The st_other field has 2 logical parts. The first two bits hold the symbol 697 // visibility (STV_*) and the remainder hold other platform-specific values. 698 bool NonVisibilityBitsUsed = llvm::find_if(Syms, [](const Elf_Sym &S) { 699 return S.st_other & ~0x3; 700 }) != Syms.end(); 701 702 ELFDumperStyle->printSymtabMessage(Obj, SymtabName, Entries, 703 NonVisibilityBitsUsed); 704 for (const auto &Sym : Syms) 705 ELFDumperStyle->printSymbol(Obj, &Sym, Syms.begin(), StrTable, IsDynamic, 706 NonVisibilityBitsUsed); 707 } 708 709 template <class ELFT> class MipsGOTParser; 710 711 template <typename ELFT> class DumpStyle { 712 public: 713 using Elf_Shdr = typename ELFT::Shdr; 714 using Elf_Sym = typename ELFT::Sym; 715 using Elf_Addr = typename ELFT::Addr; 716 717 DumpStyle(ELFDumper<ELFT> *Dumper) : Dumper(Dumper) { 718 FileName = this->Dumper->getElfObject()->getFileName(); 719 } 720 721 virtual ~DumpStyle() = default; 722 723 virtual void printFileHeaders(const ELFFile<ELFT> *Obj) = 0; 724 virtual void printGroupSections(const ELFFile<ELFT> *Obj) = 0; 725 virtual void printRelocations(const ELFFile<ELFT> *Obj) = 0; 726 virtual void printSectionHeaders(const ELFFile<ELFT> *Obj) = 0; 727 virtual void printSymbols(const ELFFile<ELFT> *Obj, bool PrintSymbols, 728 bool PrintDynamicSymbols) = 0; 729 virtual void printHashSymbols(const ELFFile<ELFT> *Obj) {} 730 virtual void printDependentLibs(const ELFFile<ELFT> *Obj) = 0; 731 virtual void printDynamic(const ELFFile<ELFT> *Obj) {} 732 virtual void printDynamicRelocations(const ELFFile<ELFT> *Obj) = 0; 733 virtual void printSymtabMessage(const ELFFile<ELFT> *Obj, StringRef Name, 734 size_t Offset, bool NonVisibilityBitsUsed) {} 735 virtual void printSymbol(const ELFFile<ELFT> *Obj, const Elf_Sym *Symbol, 736 const Elf_Sym *FirstSym, StringRef StrTable, 737 bool IsDynamic, bool NonVisibilityBitsUsed) = 0; 738 virtual void printProgramHeaders(const ELFFile<ELFT> *Obj, 739 bool PrintProgramHeaders, 740 cl::boolOrDefault PrintSectionMapping) = 0; 741 virtual void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 742 const Elf_Shdr *Sec) = 0; 743 virtual void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 744 const Elf_Shdr *Sec) = 0; 745 virtual void printVersionDependencySection(const ELFFile<ELFT> *Obj, 746 const Elf_Shdr *Sec) = 0; 747 virtual void printHashHistograms(const ELFFile<ELFT> *Obj) = 0; 748 virtual void printCGProfile(const ELFFile<ELFT> *Obj) = 0; 749 virtual void printAddrsig(const ELFFile<ELFT> *Obj) = 0; 750 virtual void printNotes(const ELFFile<ELFT> *Obj) = 0; 751 virtual void printELFLinkerOptions(const ELFFile<ELFT> *Obj) = 0; 752 virtual void printStackSizes(const ELFObjectFile<ELFT> *Obj) = 0; 753 void printNonRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj, 754 std::function<void()> PrintHeader); 755 void printRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj, 756 std::function<void()> PrintHeader); 757 void printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, uint64_t SymValue, 758 Optional<SectionRef> FunctionSec, 759 const StringRef SectionName, DataExtractor Data, 760 uint64_t *Offset); 761 void printStackSize(const ELFObjectFile<ELFT> *Obj, RelocationRef Rel, 762 SectionRef FunctionSec, 763 const StringRef &StackSizeSectionName, 764 const RelocationResolver &Resolver, DataExtractor Data); 765 virtual void printStackSizeEntry(uint64_t Size, StringRef FuncName) = 0; 766 virtual void printMipsGOT(const MipsGOTParser<ELFT> &Parser) = 0; 767 virtual void printMipsPLT(const MipsGOTParser<ELFT> &Parser) = 0; 768 virtual void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) = 0; 769 const ELFDumper<ELFT> *dumper() const { return Dumper; } 770 771 protected: 772 void printDependentLibsHelper( 773 const ELFFile<ELFT> *Obj, 774 function_ref<void(const Elf_Shdr &)> OnSectionStart, 775 function_ref<void(StringRef, uint64_t)> OnSectionEntry); 776 777 void reportUniqueWarning(Error Err) const; 778 StringRef FileName; 779 780 private: 781 const ELFDumper<ELFT> *Dumper; 782 }; 783 784 template <typename ELFT> class GNUStyle : public DumpStyle<ELFT> { 785 formatted_raw_ostream &OS; 786 787 public: 788 TYPEDEF_ELF_TYPES(ELFT) 789 790 GNUStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper) 791 : DumpStyle<ELFT>(Dumper), 792 OS(static_cast<formatted_raw_ostream&>(W.getOStream())) { 793 assert (&W.getOStream() == &llvm::fouts()); 794 } 795 796 void printFileHeaders(const ELFO *Obj) override; 797 void printGroupSections(const ELFFile<ELFT> *Obj) override; 798 void printRelocations(const ELFO *Obj) override; 799 void printSectionHeaders(const ELFO *Obj) override; 800 void printSymbols(const ELFO *Obj, bool PrintSymbols, 801 bool PrintDynamicSymbols) override; 802 void printHashSymbols(const ELFO *Obj) override; 803 void printDependentLibs(const ELFFile<ELFT> *Obj) override; 804 void printDynamic(const ELFFile<ELFT> *Obj) override; 805 void printDynamicRelocations(const ELFO *Obj) override; 806 void printSymtabMessage(const ELFO *Obj, StringRef Name, size_t Offset, 807 bool NonVisibilityBitsUsed) override; 808 void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders, 809 cl::boolOrDefault PrintSectionMapping) override; 810 void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 811 const Elf_Shdr *Sec) override; 812 void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 813 const Elf_Shdr *Sec) override; 814 void printVersionDependencySection(const ELFFile<ELFT> *Obj, 815 const Elf_Shdr *Sec) override; 816 void printHashHistograms(const ELFFile<ELFT> *Obj) override; 817 void printCGProfile(const ELFFile<ELFT> *Obj) override; 818 void printAddrsig(const ELFFile<ELFT> *Obj) override; 819 void printNotes(const ELFFile<ELFT> *Obj) override; 820 void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override; 821 void printStackSizes(const ELFObjectFile<ELFT> *Obj) override; 822 void printStackSizeEntry(uint64_t Size, StringRef FuncName) override; 823 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 824 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 825 void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override; 826 827 private: 828 void printHashHistogram(const Elf_Hash &HashTable); 829 void printGnuHashHistogram(const Elf_GnuHash &GnuHashTable); 830 831 struct Field { 832 std::string Str; 833 unsigned Column; 834 835 Field(StringRef S, unsigned Col) : Str(std::string(S)), Column(Col) {} 836 Field(unsigned Col) : Column(Col) {} 837 }; 838 839 template <typename T, typename TEnum> 840 std::string printEnum(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues) { 841 for (const auto &EnumItem : EnumValues) 842 if (EnumItem.Value == Value) 843 return std::string(EnumItem.AltName); 844 return to_hexString(Value, false); 845 } 846 847 template <typename T, typename TEnum> 848 std::string printFlags(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues, 849 TEnum EnumMask1 = {}, TEnum EnumMask2 = {}, 850 TEnum EnumMask3 = {}) { 851 std::string Str; 852 for (const auto &Flag : EnumValues) { 853 if (Flag.Value == 0) 854 continue; 855 856 TEnum EnumMask{}; 857 if (Flag.Value & EnumMask1) 858 EnumMask = EnumMask1; 859 else if (Flag.Value & EnumMask2) 860 EnumMask = EnumMask2; 861 else if (Flag.Value & EnumMask3) 862 EnumMask = EnumMask3; 863 bool IsEnum = (Flag.Value & EnumMask) != 0; 864 if ((!IsEnum && (Value & Flag.Value) == Flag.Value) || 865 (IsEnum && (Value & EnumMask) == Flag.Value)) { 866 if (!Str.empty()) 867 Str += ", "; 868 Str += Flag.AltName; 869 } 870 } 871 return Str; 872 } 873 874 formatted_raw_ostream &printField(struct Field F) { 875 if (F.Column != 0) 876 OS.PadToColumn(F.Column); 877 OS << F.Str; 878 OS.flush(); 879 return OS; 880 } 881 void printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, uint32_t Sym, 882 StringRef StrTable, uint32_t Bucket); 883 void printRelocHeader(unsigned SType); 884 void printRelocation(const ELFO *Obj, unsigned SecIndex, 885 const Elf_Shdr *SymTab, const Elf_Rela &R, 886 unsigned RelIndex, bool IsRela); 887 void printRelocation(const ELFO *Obj, const Elf_Sym *Sym, 888 StringRef SymbolName, const Elf_Rela &R, bool IsRela); 889 void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First, 890 StringRef StrTable, bool IsDynamic, 891 bool NonVisibilityBitsUsed) override; 892 std::string getSymbolSectionNdx(const ELFO *Obj, const Elf_Sym *Symbol, 893 const Elf_Sym *FirstSym); 894 void printDynamicRelocation(const ELFO *Obj, Elf_Rela R, bool IsRela); 895 void printProgramHeaders(const ELFO *Obj); 896 void printSectionMapping(const ELFO *Obj); 897 void printGNUVersionSectionProlog(const ELFFile<ELFT> *Obj, 898 const typename ELFT::Shdr *Sec, 899 const Twine &Label, unsigned EntriesNum); 900 }; 901 902 template <class ELFT> 903 void ELFDumper<ELFT>::reportUniqueWarning(Error Err) const { 904 handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) { 905 cantFail(WarningHandler(EI.message()), 906 "WarningHandler should always return ErrorSuccess"); 907 }); 908 } 909 910 template <class ELFT> 911 void DumpStyle<ELFT>::reportUniqueWarning(Error Err) const { 912 this->dumper()->reportUniqueWarning(std::move(Err)); 913 } 914 915 template <typename ELFT> class LLVMStyle : public DumpStyle<ELFT> { 916 public: 917 TYPEDEF_ELF_TYPES(ELFT) 918 919 LLVMStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper) 920 : DumpStyle<ELFT>(Dumper), W(W) {} 921 922 void printFileHeaders(const ELFO *Obj) override; 923 void printGroupSections(const ELFFile<ELFT> *Obj) override; 924 void printRelocations(const ELFO *Obj) override; 925 void printRelocations(const Elf_Shdr *Sec, const ELFO *Obj); 926 void printSectionHeaders(const ELFO *Obj) override; 927 void printSymbols(const ELFO *Obj, bool PrintSymbols, 928 bool PrintDynamicSymbols) override; 929 void printDependentLibs(const ELFFile<ELFT> *Obj) override; 930 void printDynamic(const ELFFile<ELFT> *Obj) override; 931 void printDynamicRelocations(const ELFO *Obj) override; 932 void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders, 933 cl::boolOrDefault PrintSectionMapping) override; 934 void printVersionSymbolSection(const ELFFile<ELFT> *Obj, 935 const Elf_Shdr *Sec) override; 936 void printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 937 const Elf_Shdr *Sec) override; 938 void printVersionDependencySection(const ELFFile<ELFT> *Obj, 939 const Elf_Shdr *Sec) override; 940 void printHashHistograms(const ELFFile<ELFT> *Obj) override; 941 void printCGProfile(const ELFFile<ELFT> *Obj) override; 942 void printAddrsig(const ELFFile<ELFT> *Obj) override; 943 void printNotes(const ELFFile<ELFT> *Obj) override; 944 void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override; 945 void printStackSizes(const ELFObjectFile<ELFT> *Obj) override; 946 void printStackSizeEntry(uint64_t Size, StringRef FuncName) override; 947 void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override; 948 void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override; 949 void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override; 950 951 private: 952 void printRelocation(const ELFO *Obj, unsigned SecIndex, Elf_Rela Rel, 953 unsigned RelIndex, const Elf_Shdr *SymTab); 954 void printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel); 955 void printSymbols(const ELFO *Obj); 956 void printDynamicSymbols(const ELFO *Obj); 957 void printSymbolSection(const Elf_Sym *Symbol, const Elf_Sym *First); 958 void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First, 959 StringRef StrTable, bool IsDynamic, 960 bool /*NonVisibilityBitsUsed*/) override; 961 void printProgramHeaders(const ELFO *Obj); 962 void printSectionMapping(const ELFO *Obj) {} 963 964 ScopedPrinter &W; 965 }; 966 967 } // end anonymous namespace 968 969 namespace llvm { 970 971 template <class ELFT> 972 static std::error_code createELFDumper(const ELFObjectFile<ELFT> *Obj, 973 ScopedPrinter &Writer, 974 std::unique_ptr<ObjDumper> &Result) { 975 Result.reset(new ELFDumper<ELFT>(Obj, Writer)); 976 return readobj_error::success; 977 } 978 979 std::error_code createELFDumper(const object::ObjectFile *Obj, 980 ScopedPrinter &Writer, 981 std::unique_ptr<ObjDumper> &Result) { 982 // Little-endian 32-bit 983 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj)) 984 return createELFDumper(ELFObj, Writer, Result); 985 986 // Big-endian 32-bit 987 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj)) 988 return createELFDumper(ELFObj, Writer, Result); 989 990 // Little-endian 64-bit 991 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj)) 992 return createELFDumper(ELFObj, Writer, Result); 993 994 // Big-endian 64-bit 995 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj)) 996 return createELFDumper(ELFObj, Writer, Result); 997 998 return readobj_error::unsupported_obj_file_format; 999 } 1000 1001 } // end namespace llvm 1002 1003 template <class ELFT> Error ELFDumper<ELFT>::LoadVersionMap() const { 1004 // If there is no dynamic symtab or version table, there is nothing to do. 1005 if (!DynSymRegion || !SymbolVersionSection) 1006 return Error::success(); 1007 1008 // Has the VersionMap already been loaded? 1009 if (!VersionMap.empty()) 1010 return Error::success(); 1011 1012 // The first two version indexes are reserved. 1013 // Index 0 is LOCAL, index 1 is GLOBAL. 1014 VersionMap.push_back(VersionEntry()); 1015 VersionMap.push_back(VersionEntry()); 1016 1017 auto InsertEntry = [this](unsigned N, StringRef Version, bool IsVerdef) { 1018 if (N >= VersionMap.size()) 1019 VersionMap.resize(N + 1); 1020 VersionMap[N] = {std::string(Version), IsVerdef}; 1021 }; 1022 1023 if (SymbolVersionDefSection) { 1024 Expected<std::vector<VerDef>> Defs = 1025 this->getVersionDefinitions(SymbolVersionDefSection); 1026 if (!Defs) 1027 return Defs.takeError(); 1028 for (const VerDef &Def : *Defs) 1029 InsertEntry(Def.Ndx & ELF::VERSYM_VERSION, Def.Name, true); 1030 } 1031 1032 if (SymbolVersionNeedSection) { 1033 Expected<std::vector<VerNeed>> Deps = 1034 this->getVersionDependencies(SymbolVersionNeedSection); 1035 if (!Deps) 1036 return Deps.takeError(); 1037 for (const VerNeed &Dep : *Deps) 1038 for (const VernAux &Aux : Dep.AuxV) 1039 InsertEntry(Aux.Other & ELF::VERSYM_VERSION, Aux.Name, false); 1040 } 1041 1042 return Error::success(); 1043 } 1044 1045 template <typename ELFT> 1046 Expected<StringRef> ELFDumper<ELFT>::getSymbolVersion(const Elf_Sym *Sym, 1047 bool &IsDefault) const { 1048 // This is a dynamic symbol. Look in the GNU symbol version table. 1049 if (!SymbolVersionSection) { 1050 // No version table. 1051 IsDefault = false; 1052 return ""; 1053 } 1054 1055 assert(DynSymRegion && "DynSymRegion has not been initialised"); 1056 // Determine the position in the symbol table of this entry. 1057 size_t EntryIndex = (reinterpret_cast<uintptr_t>(Sym) - 1058 reinterpret_cast<uintptr_t>(DynSymRegion->Addr)) / 1059 sizeof(Elf_Sym); 1060 1061 // Get the corresponding version index entry. 1062 const Elf_Versym *Versym = unwrapOrError( 1063 ObjF->getFileName(), ObjF->getELFFile()->template getEntry<Elf_Versym>( 1064 SymbolVersionSection, EntryIndex)); 1065 return this->getSymbolVersionByIndex(Versym->vs_index, IsDefault); 1066 } 1067 1068 template <typename ELFT> 1069 Expected<std::pair<const typename ELFT::Sym *, std::string>> 1070 ELFDumper<ELFT>::getRelocationTarget(const Elf_Shdr *SymTab, 1071 const Elf_Rela &R) const { 1072 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1073 Expected<const Elf_Sym *> SymOrErr = Obj->getRelocationSymbol(&R, SymTab); 1074 if (!SymOrErr) 1075 return SymOrErr.takeError(); 1076 const Elf_Sym *Sym = *SymOrErr; 1077 if (!Sym) 1078 return std::make_pair(nullptr, ""); 1079 1080 // The st_name field of a STT_SECTION is usually 0 (empty string). 1081 // This code block returns the section name. 1082 if (Sym->getType() == ELF::STT_SECTION) { 1083 Expected<const Elf_Shdr *> SecOrErr = 1084 Obj->getSection(Sym, SymTab, ShndxTable); 1085 if (!SecOrErr) 1086 return SecOrErr.takeError(); 1087 // A section symbol describes the section at index 0. 1088 if (*SecOrErr == nullptr) 1089 return std::make_pair(Sym, ""); 1090 1091 Expected<StringRef> NameOrErr = Obj->getSectionName(*SecOrErr); 1092 if (!NameOrErr) 1093 return NameOrErr.takeError(); 1094 return std::make_pair(Sym, NameOrErr->str()); 1095 } 1096 1097 Expected<StringRef> StrTableOrErr = Obj->getStringTableForSymtab(*SymTab); 1098 if (!StrTableOrErr) 1099 return StrTableOrErr.takeError(); 1100 1101 std::string SymbolName = 1102 getFullSymbolName(Sym, *StrTableOrErr, SymTab->sh_type == SHT_DYNSYM); 1103 return std::make_pair(Sym, SymbolName); 1104 } 1105 1106 static std::string maybeDemangle(StringRef Name) { 1107 return opts::Demangle ? demangle(std::string(Name)) : Name.str(); 1108 } 1109 1110 template <typename ELFT> 1111 Expected<std::string> 1112 ELFDumper<ELFT>::getStaticSymbolName(uint32_t Index) const { 1113 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1114 Expected<const typename ELFT::Sym *> SymOrErr = 1115 Obj->getSymbol(DotSymtabSec, Index); 1116 if (!SymOrErr) 1117 return SymOrErr.takeError(); 1118 1119 Expected<StringRef> StrTabOrErr = Obj->getStringTableForSymtab(*DotSymtabSec); 1120 if (!StrTabOrErr) 1121 return StrTabOrErr.takeError(); 1122 1123 Expected<StringRef> NameOrErr = (*SymOrErr)->getName(*StrTabOrErr); 1124 if (!NameOrErr) 1125 return NameOrErr.takeError(); 1126 return maybeDemangle(*NameOrErr); 1127 } 1128 1129 template <typename ELFT> 1130 Expected<StringRef> 1131 ELFDumper<ELFT>::getSymbolVersionByIndex(uint32_t SymbolVersionIndex, 1132 bool &IsDefault) const { 1133 size_t VersionIndex = SymbolVersionIndex & VERSYM_VERSION; 1134 1135 // Special markers for unversioned symbols. 1136 if (VersionIndex == VER_NDX_LOCAL || VersionIndex == VER_NDX_GLOBAL) { 1137 IsDefault = false; 1138 return ""; 1139 } 1140 1141 // Lookup this symbol in the version table. 1142 if (Error E = LoadVersionMap()) 1143 return std::move(E); 1144 if (VersionIndex >= VersionMap.size() || !VersionMap[VersionIndex]) 1145 return createError("SHT_GNU_versym section refers to a version index " + 1146 Twine(VersionIndex) + " which is missing"); 1147 1148 const VersionEntry &Entry = *VersionMap[VersionIndex]; 1149 if (Entry.IsVerDef) 1150 IsDefault = !(SymbolVersionIndex & VERSYM_HIDDEN); 1151 else 1152 IsDefault = false; 1153 return Entry.Name.c_str(); 1154 } 1155 1156 template <typename ELFT> 1157 std::string ELFDumper<ELFT>::getFullSymbolName(const Elf_Sym *Symbol, 1158 StringRef StrTable, 1159 bool IsDynamic) const { 1160 std::string SymbolName = maybeDemangle( 1161 unwrapOrError(ObjF->getFileName(), Symbol->getName(StrTable))); 1162 1163 if (SymbolName.empty() && Symbol->getType() == ELF::STT_SECTION) { 1164 Elf_Sym_Range Syms = unwrapOrError( 1165 ObjF->getFileName(), ObjF->getELFFile()->symbols(DotSymtabSec)); 1166 Expected<unsigned> SectionIndex = 1167 getSymbolSectionIndex(Symbol, Syms.begin()); 1168 if (!SectionIndex) { 1169 reportUniqueWarning(SectionIndex.takeError()); 1170 return "<?>"; 1171 } 1172 Expected<StringRef> NameOrErr = getSymbolSectionName(Symbol, *SectionIndex); 1173 if (!NameOrErr) { 1174 reportUniqueWarning(NameOrErr.takeError()); 1175 return ("<section " + Twine(*SectionIndex) + ">").str(); 1176 } 1177 return std::string(*NameOrErr); 1178 } 1179 1180 if (!IsDynamic) 1181 return SymbolName; 1182 1183 bool IsDefault; 1184 Expected<StringRef> VersionOrErr = getSymbolVersion(&*Symbol, IsDefault); 1185 if (!VersionOrErr) { 1186 reportUniqueWarning(VersionOrErr.takeError()); 1187 return SymbolName + "@<corrupt>"; 1188 } 1189 1190 if (!VersionOrErr->empty()) { 1191 SymbolName += (IsDefault ? "@@" : "@"); 1192 SymbolName += *VersionOrErr; 1193 } 1194 return SymbolName; 1195 } 1196 1197 template <typename ELFT> 1198 Expected<unsigned> 1199 ELFDumper<ELFT>::getSymbolSectionIndex(const Elf_Sym *Symbol, 1200 const Elf_Sym *FirstSym) const { 1201 return Symbol->st_shndx == SHN_XINDEX 1202 ? object::getExtendedSymbolTableIndex<ELFT>(Symbol, FirstSym, 1203 ShndxTable) 1204 : Symbol->st_shndx; 1205 } 1206 1207 // If the Symbol has a reserved st_shndx other than SHN_XINDEX, return a 1208 // descriptive interpretation of the st_shndx value. Otherwise, return the name 1209 // of the section with index SectionIndex. This function assumes that if the 1210 // Symbol has st_shndx == SHN_XINDEX the SectionIndex will be the value derived 1211 // from the SHT_SYMTAB_SHNDX section. 1212 template <typename ELFT> 1213 Expected<StringRef> 1214 ELFDumper<ELFT>::getSymbolSectionName(const Elf_Sym *Symbol, 1215 unsigned SectionIndex) const { 1216 if (Symbol->isUndefined()) 1217 return "Undefined"; 1218 if (Symbol->isProcessorSpecific()) 1219 return "Processor Specific"; 1220 if (Symbol->isOSSpecific()) 1221 return "Operating System Specific"; 1222 if (Symbol->isAbsolute()) 1223 return "Absolute"; 1224 if (Symbol->isCommon()) 1225 return "Common"; 1226 if (Symbol->isReserved() && Symbol->st_shndx != SHN_XINDEX) 1227 return "Reserved"; 1228 1229 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 1230 Expected<const Elf_Shdr *> SecOrErr = 1231 Obj->getSection(SectionIndex); 1232 if (!SecOrErr) 1233 return SecOrErr.takeError(); 1234 return Obj->getSectionName(*SecOrErr); 1235 } 1236 1237 template <class ELFO> 1238 static const typename ELFO::Elf_Shdr * 1239 findNotEmptySectionByAddress(const ELFO *Obj, StringRef FileName, 1240 uint64_t Addr) { 1241 for (const auto &Shdr : unwrapOrError(FileName, Obj->sections())) 1242 if (Shdr.sh_addr == Addr && Shdr.sh_size > 0) 1243 return &Shdr; 1244 return nullptr; 1245 } 1246 1247 template <class ELFO> 1248 static const typename ELFO::Elf_Shdr * 1249 findSectionByName(const ELFO &Obj, StringRef FileName, StringRef Name) { 1250 for (const auto &Shdr : unwrapOrError(FileName, Obj.sections())) 1251 if (Name == unwrapOrError(FileName, Obj.getSectionName(&Shdr))) 1252 return &Shdr; 1253 return nullptr; 1254 } 1255 1256 static const EnumEntry<unsigned> ElfClass[] = { 1257 {"None", "none", ELF::ELFCLASSNONE}, 1258 {"32-bit", "ELF32", ELF::ELFCLASS32}, 1259 {"64-bit", "ELF64", ELF::ELFCLASS64}, 1260 }; 1261 1262 static const EnumEntry<unsigned> ElfDataEncoding[] = { 1263 {"None", "none", ELF::ELFDATANONE}, 1264 {"LittleEndian", "2's complement, little endian", ELF::ELFDATA2LSB}, 1265 {"BigEndian", "2's complement, big endian", ELF::ELFDATA2MSB}, 1266 }; 1267 1268 static const EnumEntry<unsigned> ElfObjectFileType[] = { 1269 {"None", "NONE (none)", ELF::ET_NONE}, 1270 {"Relocatable", "REL (Relocatable file)", ELF::ET_REL}, 1271 {"Executable", "EXEC (Executable file)", ELF::ET_EXEC}, 1272 {"SharedObject", "DYN (Shared object file)", ELF::ET_DYN}, 1273 {"Core", "CORE (Core file)", ELF::ET_CORE}, 1274 }; 1275 1276 static const EnumEntry<unsigned> ElfOSABI[] = { 1277 {"SystemV", "UNIX - System V", ELF::ELFOSABI_NONE}, 1278 {"HPUX", "UNIX - HP-UX", ELF::ELFOSABI_HPUX}, 1279 {"NetBSD", "UNIX - NetBSD", ELF::ELFOSABI_NETBSD}, 1280 {"GNU/Linux", "UNIX - GNU", ELF::ELFOSABI_LINUX}, 1281 {"GNU/Hurd", "GNU/Hurd", ELF::ELFOSABI_HURD}, 1282 {"Solaris", "UNIX - Solaris", ELF::ELFOSABI_SOLARIS}, 1283 {"AIX", "UNIX - AIX", ELF::ELFOSABI_AIX}, 1284 {"IRIX", "UNIX - IRIX", ELF::ELFOSABI_IRIX}, 1285 {"FreeBSD", "UNIX - FreeBSD", ELF::ELFOSABI_FREEBSD}, 1286 {"TRU64", "UNIX - TRU64", ELF::ELFOSABI_TRU64}, 1287 {"Modesto", "Novell - Modesto", ELF::ELFOSABI_MODESTO}, 1288 {"OpenBSD", "UNIX - OpenBSD", ELF::ELFOSABI_OPENBSD}, 1289 {"OpenVMS", "VMS - OpenVMS", ELF::ELFOSABI_OPENVMS}, 1290 {"NSK", "HP - Non-Stop Kernel", ELF::ELFOSABI_NSK}, 1291 {"AROS", "AROS", ELF::ELFOSABI_AROS}, 1292 {"FenixOS", "FenixOS", ELF::ELFOSABI_FENIXOS}, 1293 {"CloudABI", "CloudABI", ELF::ELFOSABI_CLOUDABI}, 1294 {"Standalone", "Standalone App", ELF::ELFOSABI_STANDALONE} 1295 }; 1296 1297 static const EnumEntry<unsigned> SymVersionFlags[] = { 1298 {"Base", "BASE", VER_FLG_BASE}, 1299 {"Weak", "WEAK", VER_FLG_WEAK}, 1300 {"Info", "INFO", VER_FLG_INFO}}; 1301 1302 static const EnumEntry<unsigned> AMDGPUElfOSABI[] = { 1303 {"AMDGPU_HSA", "AMDGPU - HSA", ELF::ELFOSABI_AMDGPU_HSA}, 1304 {"AMDGPU_PAL", "AMDGPU - PAL", ELF::ELFOSABI_AMDGPU_PAL}, 1305 {"AMDGPU_MESA3D", "AMDGPU - MESA3D", ELF::ELFOSABI_AMDGPU_MESA3D} 1306 }; 1307 1308 static const EnumEntry<unsigned> ARMElfOSABI[] = { 1309 {"ARM", "ARM", ELF::ELFOSABI_ARM} 1310 }; 1311 1312 static const EnumEntry<unsigned> C6000ElfOSABI[] = { 1313 {"C6000_ELFABI", "Bare-metal C6000", ELF::ELFOSABI_C6000_ELFABI}, 1314 {"C6000_LINUX", "Linux C6000", ELF::ELFOSABI_C6000_LINUX} 1315 }; 1316 1317 static const EnumEntry<unsigned> ElfMachineType[] = { 1318 ENUM_ENT(EM_NONE, "None"), 1319 ENUM_ENT(EM_M32, "WE32100"), 1320 ENUM_ENT(EM_SPARC, "Sparc"), 1321 ENUM_ENT(EM_386, "Intel 80386"), 1322 ENUM_ENT(EM_68K, "MC68000"), 1323 ENUM_ENT(EM_88K, "MC88000"), 1324 ENUM_ENT(EM_IAMCU, "EM_IAMCU"), 1325 ENUM_ENT(EM_860, "Intel 80860"), 1326 ENUM_ENT(EM_MIPS, "MIPS R3000"), 1327 ENUM_ENT(EM_S370, "IBM System/370"), 1328 ENUM_ENT(EM_MIPS_RS3_LE, "MIPS R3000 little-endian"), 1329 ENUM_ENT(EM_PARISC, "HPPA"), 1330 ENUM_ENT(EM_VPP500, "Fujitsu VPP500"), 1331 ENUM_ENT(EM_SPARC32PLUS, "Sparc v8+"), 1332 ENUM_ENT(EM_960, "Intel 80960"), 1333 ENUM_ENT(EM_PPC, "PowerPC"), 1334 ENUM_ENT(EM_PPC64, "PowerPC64"), 1335 ENUM_ENT(EM_S390, "IBM S/390"), 1336 ENUM_ENT(EM_SPU, "SPU"), 1337 ENUM_ENT(EM_V800, "NEC V800 series"), 1338 ENUM_ENT(EM_FR20, "Fujistsu FR20"), 1339 ENUM_ENT(EM_RH32, "TRW RH-32"), 1340 ENUM_ENT(EM_RCE, "Motorola RCE"), 1341 ENUM_ENT(EM_ARM, "ARM"), 1342 ENUM_ENT(EM_ALPHA, "EM_ALPHA"), 1343 ENUM_ENT(EM_SH, "Hitachi SH"), 1344 ENUM_ENT(EM_SPARCV9, "Sparc v9"), 1345 ENUM_ENT(EM_TRICORE, "Siemens Tricore"), 1346 ENUM_ENT(EM_ARC, "ARC"), 1347 ENUM_ENT(EM_H8_300, "Hitachi H8/300"), 1348 ENUM_ENT(EM_H8_300H, "Hitachi H8/300H"), 1349 ENUM_ENT(EM_H8S, "Hitachi H8S"), 1350 ENUM_ENT(EM_H8_500, "Hitachi H8/500"), 1351 ENUM_ENT(EM_IA_64, "Intel IA-64"), 1352 ENUM_ENT(EM_MIPS_X, "Stanford MIPS-X"), 1353 ENUM_ENT(EM_COLDFIRE, "Motorola Coldfire"), 1354 ENUM_ENT(EM_68HC12, "Motorola MC68HC12 Microcontroller"), 1355 ENUM_ENT(EM_MMA, "Fujitsu Multimedia Accelerator"), 1356 ENUM_ENT(EM_PCP, "Siemens PCP"), 1357 ENUM_ENT(EM_NCPU, "Sony nCPU embedded RISC processor"), 1358 ENUM_ENT(EM_NDR1, "Denso NDR1 microprocesspr"), 1359 ENUM_ENT(EM_STARCORE, "Motorola Star*Core processor"), 1360 ENUM_ENT(EM_ME16, "Toyota ME16 processor"), 1361 ENUM_ENT(EM_ST100, "STMicroelectronics ST100 processor"), 1362 ENUM_ENT(EM_TINYJ, "Advanced Logic Corp. TinyJ embedded processor"), 1363 ENUM_ENT(EM_X86_64, "Advanced Micro Devices X86-64"), 1364 ENUM_ENT(EM_PDSP, "Sony DSP processor"), 1365 ENUM_ENT(EM_PDP10, "Digital Equipment Corp. PDP-10"), 1366 ENUM_ENT(EM_PDP11, "Digital Equipment Corp. PDP-11"), 1367 ENUM_ENT(EM_FX66, "Siemens FX66 microcontroller"), 1368 ENUM_ENT(EM_ST9PLUS, "STMicroelectronics ST9+ 8/16 bit microcontroller"), 1369 ENUM_ENT(EM_ST7, "STMicroelectronics ST7 8-bit microcontroller"), 1370 ENUM_ENT(EM_68HC16, "Motorola MC68HC16 Microcontroller"), 1371 ENUM_ENT(EM_68HC11, "Motorola MC68HC11 Microcontroller"), 1372 ENUM_ENT(EM_68HC08, "Motorola MC68HC08 Microcontroller"), 1373 ENUM_ENT(EM_68HC05, "Motorola MC68HC05 Microcontroller"), 1374 ENUM_ENT(EM_SVX, "Silicon Graphics SVx"), 1375 ENUM_ENT(EM_ST19, "STMicroelectronics ST19 8-bit microcontroller"), 1376 ENUM_ENT(EM_VAX, "Digital VAX"), 1377 ENUM_ENT(EM_CRIS, "Axis Communications 32-bit embedded processor"), 1378 ENUM_ENT(EM_JAVELIN, "Infineon Technologies 32-bit embedded cpu"), 1379 ENUM_ENT(EM_FIREPATH, "Element 14 64-bit DSP processor"), 1380 ENUM_ENT(EM_ZSP, "LSI Logic's 16-bit DSP processor"), 1381 ENUM_ENT(EM_MMIX, "Donald Knuth's educational 64-bit processor"), 1382 ENUM_ENT(EM_HUANY, "Harvard Universitys's machine-independent object format"), 1383 ENUM_ENT(EM_PRISM, "Vitesse Prism"), 1384 ENUM_ENT(EM_AVR, "Atmel AVR 8-bit microcontroller"), 1385 ENUM_ENT(EM_FR30, "Fujitsu FR30"), 1386 ENUM_ENT(EM_D10V, "Mitsubishi D10V"), 1387 ENUM_ENT(EM_D30V, "Mitsubishi D30V"), 1388 ENUM_ENT(EM_V850, "NEC v850"), 1389 ENUM_ENT(EM_M32R, "Renesas M32R (formerly Mitsubishi M32r)"), 1390 ENUM_ENT(EM_MN10300, "Matsushita MN10300"), 1391 ENUM_ENT(EM_MN10200, "Matsushita MN10200"), 1392 ENUM_ENT(EM_PJ, "picoJava"), 1393 ENUM_ENT(EM_OPENRISC, "OpenRISC 32-bit embedded processor"), 1394 ENUM_ENT(EM_ARC_COMPACT, "EM_ARC_COMPACT"), 1395 ENUM_ENT(EM_XTENSA, "Tensilica Xtensa Processor"), 1396 ENUM_ENT(EM_VIDEOCORE, "Alphamosaic VideoCore processor"), 1397 ENUM_ENT(EM_TMM_GPP, "Thompson Multimedia General Purpose Processor"), 1398 ENUM_ENT(EM_NS32K, "National Semiconductor 32000 series"), 1399 ENUM_ENT(EM_TPC, "Tenor Network TPC processor"), 1400 ENUM_ENT(EM_SNP1K, "EM_SNP1K"), 1401 ENUM_ENT(EM_ST200, "STMicroelectronics ST200 microcontroller"), 1402 ENUM_ENT(EM_IP2K, "Ubicom IP2xxx 8-bit microcontrollers"), 1403 ENUM_ENT(EM_MAX, "MAX Processor"), 1404 ENUM_ENT(EM_CR, "National Semiconductor CompactRISC"), 1405 ENUM_ENT(EM_F2MC16, "Fujitsu F2MC16"), 1406 ENUM_ENT(EM_MSP430, "Texas Instruments msp430 microcontroller"), 1407 ENUM_ENT(EM_BLACKFIN, "Analog Devices Blackfin"), 1408 ENUM_ENT(EM_SE_C33, "S1C33 Family of Seiko Epson processors"), 1409 ENUM_ENT(EM_SEP, "Sharp embedded microprocessor"), 1410 ENUM_ENT(EM_ARCA, "Arca RISC microprocessor"), 1411 ENUM_ENT(EM_UNICORE, "Unicore"), 1412 ENUM_ENT(EM_EXCESS, "eXcess 16/32/64-bit configurable embedded CPU"), 1413 ENUM_ENT(EM_DXP, "Icera Semiconductor Inc. Deep Execution Processor"), 1414 ENUM_ENT(EM_ALTERA_NIOS2, "Altera Nios"), 1415 ENUM_ENT(EM_CRX, "National Semiconductor CRX microprocessor"), 1416 ENUM_ENT(EM_XGATE, "Motorola XGATE embedded processor"), 1417 ENUM_ENT(EM_C166, "Infineon Technologies xc16x"), 1418 ENUM_ENT(EM_M16C, "Renesas M16C"), 1419 ENUM_ENT(EM_DSPIC30F, "Microchip Technology dsPIC30F Digital Signal Controller"), 1420 ENUM_ENT(EM_CE, "Freescale Communication Engine RISC core"), 1421 ENUM_ENT(EM_M32C, "Renesas M32C"), 1422 ENUM_ENT(EM_TSK3000, "Altium TSK3000 core"), 1423 ENUM_ENT(EM_RS08, "Freescale RS08 embedded processor"), 1424 ENUM_ENT(EM_SHARC, "EM_SHARC"), 1425 ENUM_ENT(EM_ECOG2, "Cyan Technology eCOG2 microprocessor"), 1426 ENUM_ENT(EM_SCORE7, "SUNPLUS S+Core"), 1427 ENUM_ENT(EM_DSP24, "New Japan Radio (NJR) 24-bit DSP Processor"), 1428 ENUM_ENT(EM_VIDEOCORE3, "Broadcom VideoCore III processor"), 1429 ENUM_ENT(EM_LATTICEMICO32, "Lattice Mico32"), 1430 ENUM_ENT(EM_SE_C17, "Seiko Epson C17 family"), 1431 ENUM_ENT(EM_TI_C6000, "Texas Instruments TMS320C6000 DSP family"), 1432 ENUM_ENT(EM_TI_C2000, "Texas Instruments TMS320C2000 DSP family"), 1433 ENUM_ENT(EM_TI_C5500, "Texas Instruments TMS320C55x DSP family"), 1434 ENUM_ENT(EM_MMDSP_PLUS, "STMicroelectronics 64bit VLIW Data Signal Processor"), 1435 ENUM_ENT(EM_CYPRESS_M8C, "Cypress M8C microprocessor"), 1436 ENUM_ENT(EM_R32C, "Renesas R32C series microprocessors"), 1437 ENUM_ENT(EM_TRIMEDIA, "NXP Semiconductors TriMedia architecture family"), 1438 ENUM_ENT(EM_HEXAGON, "Qualcomm Hexagon"), 1439 ENUM_ENT(EM_8051, "Intel 8051 and variants"), 1440 ENUM_ENT(EM_STXP7X, "STMicroelectronics STxP7x family"), 1441 ENUM_ENT(EM_NDS32, "Andes Technology compact code size embedded RISC processor family"), 1442 ENUM_ENT(EM_ECOG1, "Cyan Technology eCOG1 microprocessor"), 1443 // FIXME: Following EM_ECOG1X definitions is dead code since EM_ECOG1X has 1444 // an identical number to EM_ECOG1. 1445 ENUM_ENT(EM_ECOG1X, "Cyan Technology eCOG1X family"), 1446 ENUM_ENT(EM_MAXQ30, "Dallas Semiconductor MAXQ30 Core microcontrollers"), 1447 ENUM_ENT(EM_XIMO16, "New Japan Radio (NJR) 16-bit DSP Processor"), 1448 ENUM_ENT(EM_MANIK, "M2000 Reconfigurable RISC Microprocessor"), 1449 ENUM_ENT(EM_CRAYNV2, "Cray Inc. NV2 vector architecture"), 1450 ENUM_ENT(EM_RX, "Renesas RX"), 1451 ENUM_ENT(EM_METAG, "Imagination Technologies Meta processor architecture"), 1452 ENUM_ENT(EM_MCST_ELBRUS, "MCST Elbrus general purpose hardware architecture"), 1453 ENUM_ENT(EM_ECOG16, "Cyan Technology eCOG16 family"), 1454 ENUM_ENT(EM_CR16, "Xilinx MicroBlaze"), 1455 ENUM_ENT(EM_ETPU, "Freescale Extended Time Processing Unit"), 1456 ENUM_ENT(EM_SLE9X, "Infineon Technologies SLE9X core"), 1457 ENUM_ENT(EM_L10M, "EM_L10M"), 1458 ENUM_ENT(EM_K10M, "EM_K10M"), 1459 ENUM_ENT(EM_AARCH64, "AArch64"), 1460 ENUM_ENT(EM_AVR32, "Atmel Corporation 32-bit microprocessor family"), 1461 ENUM_ENT(EM_STM8, "STMicroeletronics STM8 8-bit microcontroller"), 1462 ENUM_ENT(EM_TILE64, "Tilera TILE64 multicore architecture family"), 1463 ENUM_ENT(EM_TILEPRO, "Tilera TILEPro multicore architecture family"), 1464 ENUM_ENT(EM_CUDA, "NVIDIA CUDA architecture"), 1465 ENUM_ENT(EM_TILEGX, "Tilera TILE-Gx multicore architecture family"), 1466 ENUM_ENT(EM_CLOUDSHIELD, "EM_CLOUDSHIELD"), 1467 ENUM_ENT(EM_COREA_1ST, "EM_COREA_1ST"), 1468 ENUM_ENT(EM_COREA_2ND, "EM_COREA_2ND"), 1469 ENUM_ENT(EM_ARC_COMPACT2, "EM_ARC_COMPACT2"), 1470 ENUM_ENT(EM_OPEN8, "EM_OPEN8"), 1471 ENUM_ENT(EM_RL78, "Renesas RL78"), 1472 ENUM_ENT(EM_VIDEOCORE5, "Broadcom VideoCore V processor"), 1473 ENUM_ENT(EM_78KOR, "EM_78KOR"), 1474 ENUM_ENT(EM_56800EX, "EM_56800EX"), 1475 ENUM_ENT(EM_AMDGPU, "EM_AMDGPU"), 1476 ENUM_ENT(EM_RISCV, "RISC-V"), 1477 ENUM_ENT(EM_LANAI, "EM_LANAI"), 1478 ENUM_ENT(EM_BPF, "EM_BPF"), 1479 ENUM_ENT(EM_VE, "NEC SX-Aurora Vector Engine"), 1480 }; 1481 1482 static const EnumEntry<unsigned> ElfSymbolBindings[] = { 1483 {"Local", "LOCAL", ELF::STB_LOCAL}, 1484 {"Global", "GLOBAL", ELF::STB_GLOBAL}, 1485 {"Weak", "WEAK", ELF::STB_WEAK}, 1486 {"Unique", "UNIQUE", ELF::STB_GNU_UNIQUE}}; 1487 1488 static const EnumEntry<unsigned> ElfSymbolVisibilities[] = { 1489 {"DEFAULT", "DEFAULT", ELF::STV_DEFAULT}, 1490 {"INTERNAL", "INTERNAL", ELF::STV_INTERNAL}, 1491 {"HIDDEN", "HIDDEN", ELF::STV_HIDDEN}, 1492 {"PROTECTED", "PROTECTED", ELF::STV_PROTECTED}}; 1493 1494 static const EnumEntry<unsigned> AMDGPUSymbolTypes[] = { 1495 { "AMDGPU_HSA_KERNEL", ELF::STT_AMDGPU_HSA_KERNEL } 1496 }; 1497 1498 static const char *getGroupType(uint32_t Flag) { 1499 if (Flag & ELF::GRP_COMDAT) 1500 return "COMDAT"; 1501 else 1502 return "(unknown)"; 1503 } 1504 1505 static const EnumEntry<unsigned> ElfSectionFlags[] = { 1506 ENUM_ENT(SHF_WRITE, "W"), 1507 ENUM_ENT(SHF_ALLOC, "A"), 1508 ENUM_ENT(SHF_EXECINSTR, "X"), 1509 ENUM_ENT(SHF_MERGE, "M"), 1510 ENUM_ENT(SHF_STRINGS, "S"), 1511 ENUM_ENT(SHF_INFO_LINK, "I"), 1512 ENUM_ENT(SHF_LINK_ORDER, "L"), 1513 ENUM_ENT(SHF_OS_NONCONFORMING, "O"), 1514 ENUM_ENT(SHF_GROUP, "G"), 1515 ENUM_ENT(SHF_TLS, "T"), 1516 ENUM_ENT(SHF_COMPRESSED, "C"), 1517 ENUM_ENT(SHF_EXCLUDE, "E"), 1518 }; 1519 1520 static const EnumEntry<unsigned> ElfXCoreSectionFlags[] = { 1521 ENUM_ENT(XCORE_SHF_CP_SECTION, ""), 1522 ENUM_ENT(XCORE_SHF_DP_SECTION, "") 1523 }; 1524 1525 static const EnumEntry<unsigned> ElfARMSectionFlags[] = { 1526 ENUM_ENT(SHF_ARM_PURECODE, "y") 1527 }; 1528 1529 static const EnumEntry<unsigned> ElfHexagonSectionFlags[] = { 1530 ENUM_ENT(SHF_HEX_GPREL, "") 1531 }; 1532 1533 static const EnumEntry<unsigned> ElfMipsSectionFlags[] = { 1534 ENUM_ENT(SHF_MIPS_NODUPES, ""), 1535 ENUM_ENT(SHF_MIPS_NAMES, ""), 1536 ENUM_ENT(SHF_MIPS_LOCAL, ""), 1537 ENUM_ENT(SHF_MIPS_NOSTRIP, ""), 1538 ENUM_ENT(SHF_MIPS_GPREL, ""), 1539 ENUM_ENT(SHF_MIPS_MERGE, ""), 1540 ENUM_ENT(SHF_MIPS_ADDR, ""), 1541 ENUM_ENT(SHF_MIPS_STRING, "") 1542 }; 1543 1544 static const EnumEntry<unsigned> ElfX86_64SectionFlags[] = { 1545 ENUM_ENT(SHF_X86_64_LARGE, "l") 1546 }; 1547 1548 static std::vector<EnumEntry<unsigned>> 1549 getSectionFlagsForTarget(unsigned EMachine) { 1550 std::vector<EnumEntry<unsigned>> Ret(std::begin(ElfSectionFlags), 1551 std::end(ElfSectionFlags)); 1552 switch (EMachine) { 1553 case EM_ARM: 1554 Ret.insert(Ret.end(), std::begin(ElfARMSectionFlags), 1555 std::end(ElfARMSectionFlags)); 1556 break; 1557 case EM_HEXAGON: 1558 Ret.insert(Ret.end(), std::begin(ElfHexagonSectionFlags), 1559 std::end(ElfHexagonSectionFlags)); 1560 break; 1561 case EM_MIPS: 1562 Ret.insert(Ret.end(), std::begin(ElfMipsSectionFlags), 1563 std::end(ElfMipsSectionFlags)); 1564 break; 1565 case EM_X86_64: 1566 Ret.insert(Ret.end(), std::begin(ElfX86_64SectionFlags), 1567 std::end(ElfX86_64SectionFlags)); 1568 break; 1569 case EM_XCORE: 1570 Ret.insert(Ret.end(), std::begin(ElfXCoreSectionFlags), 1571 std::end(ElfXCoreSectionFlags)); 1572 break; 1573 default: 1574 break; 1575 } 1576 return Ret; 1577 } 1578 1579 static std::string getGNUFlags(unsigned EMachine, uint64_t Flags) { 1580 // Here we are trying to build the flags string in the same way as GNU does. 1581 // It is not that straightforward. Imagine we have sh_flags == 0x90000000. 1582 // SHF_EXCLUDE ("E") has a value of 0x80000000 and SHF_MASKPROC is 0xf0000000. 1583 // GNU readelf will not print "E" or "Ep" in this case, but will print just 1584 // "p". It only will print "E" when no other processor flag is set. 1585 std::string Str; 1586 bool HasUnknownFlag = false; 1587 bool HasOSFlag = false; 1588 bool HasProcFlag = false; 1589 std::vector<EnumEntry<unsigned>> FlagsList = 1590 getSectionFlagsForTarget(EMachine); 1591 while (Flags) { 1592 // Take the least significant bit as a flag. 1593 uint64_t Flag = Flags & -Flags; 1594 Flags -= Flag; 1595 1596 // Find the flag in the known flags list. 1597 auto I = llvm::find_if(FlagsList, [=](const EnumEntry<unsigned> &E) { 1598 // Flags with empty names are not printed in GNU style output. 1599 return E.Value == Flag && !E.AltName.empty(); 1600 }); 1601 if (I != FlagsList.end()) { 1602 Str += I->AltName; 1603 continue; 1604 } 1605 1606 // If we did not find a matching regular flag, then we deal with an OS 1607 // specific flag, processor specific flag or an unknown flag. 1608 if (Flag & ELF::SHF_MASKOS) { 1609 HasOSFlag = true; 1610 Flags &= ~ELF::SHF_MASKOS; 1611 } else if (Flag & ELF::SHF_MASKPROC) { 1612 HasProcFlag = true; 1613 // Mask off all the processor-specific bits. This removes the SHF_EXCLUDE 1614 // bit if set so that it doesn't also get printed. 1615 Flags &= ~ELF::SHF_MASKPROC; 1616 } else { 1617 HasUnknownFlag = true; 1618 } 1619 } 1620 1621 // "o", "p" and "x" are printed last. 1622 if (HasOSFlag) 1623 Str += "o"; 1624 if (HasProcFlag) 1625 Str += "p"; 1626 if (HasUnknownFlag) 1627 Str += "x"; 1628 return Str; 1629 } 1630 1631 static const char *getElfSegmentType(unsigned Arch, unsigned Type) { 1632 // Check potentially overlapped processor-specific 1633 // program header type. 1634 switch (Arch) { 1635 case ELF::EM_ARM: 1636 switch (Type) { LLVM_READOBJ_ENUM_CASE(ELF, PT_ARM_EXIDX); } 1637 break; 1638 case ELF::EM_MIPS: 1639 case ELF::EM_MIPS_RS3_LE: 1640 switch (Type) { 1641 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_REGINFO); 1642 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_RTPROC); 1643 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_OPTIONS); 1644 LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_ABIFLAGS); 1645 } 1646 break; 1647 } 1648 1649 switch (Type) { 1650 LLVM_READOBJ_ENUM_CASE(ELF, PT_NULL ); 1651 LLVM_READOBJ_ENUM_CASE(ELF, PT_LOAD ); 1652 LLVM_READOBJ_ENUM_CASE(ELF, PT_DYNAMIC); 1653 LLVM_READOBJ_ENUM_CASE(ELF, PT_INTERP ); 1654 LLVM_READOBJ_ENUM_CASE(ELF, PT_NOTE ); 1655 LLVM_READOBJ_ENUM_CASE(ELF, PT_SHLIB ); 1656 LLVM_READOBJ_ENUM_CASE(ELF, PT_PHDR ); 1657 LLVM_READOBJ_ENUM_CASE(ELF, PT_TLS ); 1658 1659 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_EH_FRAME); 1660 LLVM_READOBJ_ENUM_CASE(ELF, PT_SUNW_UNWIND); 1661 1662 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_STACK); 1663 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_RELRO); 1664 LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_PROPERTY); 1665 1666 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_RANDOMIZE); 1667 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_WXNEEDED); 1668 LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_BOOTDATA); 1669 1670 default: 1671 return ""; 1672 } 1673 } 1674 1675 static std::string getElfPtType(unsigned Arch, unsigned Type) { 1676 switch (Type) { 1677 LLVM_READOBJ_PHDR_ENUM(ELF, PT_NULL) 1678 LLVM_READOBJ_PHDR_ENUM(ELF, PT_LOAD) 1679 LLVM_READOBJ_PHDR_ENUM(ELF, PT_DYNAMIC) 1680 LLVM_READOBJ_PHDR_ENUM(ELF, PT_INTERP) 1681 LLVM_READOBJ_PHDR_ENUM(ELF, PT_NOTE) 1682 LLVM_READOBJ_PHDR_ENUM(ELF, PT_SHLIB) 1683 LLVM_READOBJ_PHDR_ENUM(ELF, PT_PHDR) 1684 LLVM_READOBJ_PHDR_ENUM(ELF, PT_TLS) 1685 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_EH_FRAME) 1686 LLVM_READOBJ_PHDR_ENUM(ELF, PT_SUNW_UNWIND) 1687 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_STACK) 1688 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_RELRO) 1689 LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_PROPERTY) 1690 default: 1691 // All machine specific PT_* types 1692 switch (Arch) { 1693 case ELF::EM_ARM: 1694 if (Type == ELF::PT_ARM_EXIDX) 1695 return "EXIDX"; 1696 break; 1697 case ELF::EM_MIPS: 1698 case ELF::EM_MIPS_RS3_LE: 1699 switch (Type) { 1700 case PT_MIPS_REGINFO: 1701 return "REGINFO"; 1702 case PT_MIPS_RTPROC: 1703 return "RTPROC"; 1704 case PT_MIPS_OPTIONS: 1705 return "OPTIONS"; 1706 case PT_MIPS_ABIFLAGS: 1707 return "ABIFLAGS"; 1708 } 1709 break; 1710 } 1711 } 1712 return std::string("<unknown>: ") + to_string(format_hex(Type, 1)); 1713 } 1714 1715 static const EnumEntry<unsigned> ElfSegmentFlags[] = { 1716 LLVM_READOBJ_ENUM_ENT(ELF, PF_X), 1717 LLVM_READOBJ_ENUM_ENT(ELF, PF_W), 1718 LLVM_READOBJ_ENUM_ENT(ELF, PF_R) 1719 }; 1720 1721 static const EnumEntry<unsigned> ElfHeaderMipsFlags[] = { 1722 ENUM_ENT(EF_MIPS_NOREORDER, "noreorder"), 1723 ENUM_ENT(EF_MIPS_PIC, "pic"), 1724 ENUM_ENT(EF_MIPS_CPIC, "cpic"), 1725 ENUM_ENT(EF_MIPS_ABI2, "abi2"), 1726 ENUM_ENT(EF_MIPS_32BITMODE, "32bitmode"), 1727 ENUM_ENT(EF_MIPS_FP64, "fp64"), 1728 ENUM_ENT(EF_MIPS_NAN2008, "nan2008"), 1729 ENUM_ENT(EF_MIPS_ABI_O32, "o32"), 1730 ENUM_ENT(EF_MIPS_ABI_O64, "o64"), 1731 ENUM_ENT(EF_MIPS_ABI_EABI32, "eabi32"), 1732 ENUM_ENT(EF_MIPS_ABI_EABI64, "eabi64"), 1733 ENUM_ENT(EF_MIPS_MACH_3900, "3900"), 1734 ENUM_ENT(EF_MIPS_MACH_4010, "4010"), 1735 ENUM_ENT(EF_MIPS_MACH_4100, "4100"), 1736 ENUM_ENT(EF_MIPS_MACH_4650, "4650"), 1737 ENUM_ENT(EF_MIPS_MACH_4120, "4120"), 1738 ENUM_ENT(EF_MIPS_MACH_4111, "4111"), 1739 ENUM_ENT(EF_MIPS_MACH_SB1, "sb1"), 1740 ENUM_ENT(EF_MIPS_MACH_OCTEON, "octeon"), 1741 ENUM_ENT(EF_MIPS_MACH_XLR, "xlr"), 1742 ENUM_ENT(EF_MIPS_MACH_OCTEON2, "octeon2"), 1743 ENUM_ENT(EF_MIPS_MACH_OCTEON3, "octeon3"), 1744 ENUM_ENT(EF_MIPS_MACH_5400, "5400"), 1745 ENUM_ENT(EF_MIPS_MACH_5900, "5900"), 1746 ENUM_ENT(EF_MIPS_MACH_5500, "5500"), 1747 ENUM_ENT(EF_MIPS_MACH_9000, "9000"), 1748 ENUM_ENT(EF_MIPS_MACH_LS2E, "loongson-2e"), 1749 ENUM_ENT(EF_MIPS_MACH_LS2F, "loongson-2f"), 1750 ENUM_ENT(EF_MIPS_MACH_LS3A, "loongson-3a"), 1751 ENUM_ENT(EF_MIPS_MICROMIPS, "micromips"), 1752 ENUM_ENT(EF_MIPS_ARCH_ASE_M16, "mips16"), 1753 ENUM_ENT(EF_MIPS_ARCH_ASE_MDMX, "mdmx"), 1754 ENUM_ENT(EF_MIPS_ARCH_1, "mips1"), 1755 ENUM_ENT(EF_MIPS_ARCH_2, "mips2"), 1756 ENUM_ENT(EF_MIPS_ARCH_3, "mips3"), 1757 ENUM_ENT(EF_MIPS_ARCH_4, "mips4"), 1758 ENUM_ENT(EF_MIPS_ARCH_5, "mips5"), 1759 ENUM_ENT(EF_MIPS_ARCH_32, "mips32"), 1760 ENUM_ENT(EF_MIPS_ARCH_64, "mips64"), 1761 ENUM_ENT(EF_MIPS_ARCH_32R2, "mips32r2"), 1762 ENUM_ENT(EF_MIPS_ARCH_64R2, "mips64r2"), 1763 ENUM_ENT(EF_MIPS_ARCH_32R6, "mips32r6"), 1764 ENUM_ENT(EF_MIPS_ARCH_64R6, "mips64r6") 1765 }; 1766 1767 static const EnumEntry<unsigned> ElfHeaderAMDGPUFlags[] = { 1768 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_NONE), 1769 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R600), 1770 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R630), 1771 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RS880), 1772 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV670), 1773 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV710), 1774 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV730), 1775 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV770), 1776 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CEDAR), 1777 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CYPRESS), 1778 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_JUNIPER), 1779 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_REDWOOD), 1780 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_SUMO), 1781 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_BARTS), 1782 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAICOS), 1783 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAYMAN), 1784 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_TURKS), 1785 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX600), 1786 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX601), 1787 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX700), 1788 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX701), 1789 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX702), 1790 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX703), 1791 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX704), 1792 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX801), 1793 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX802), 1794 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX803), 1795 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX810), 1796 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX900), 1797 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX902), 1798 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX904), 1799 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX906), 1800 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX908), 1801 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX909), 1802 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1010), 1803 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1011), 1804 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1012), 1805 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1030), 1806 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_XNACK), 1807 LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_SRAM_ECC) 1808 }; 1809 1810 static const EnumEntry<unsigned> ElfHeaderRISCVFlags[] = { 1811 ENUM_ENT(EF_RISCV_RVC, "RVC"), 1812 ENUM_ENT(EF_RISCV_FLOAT_ABI_SINGLE, "single-float ABI"), 1813 ENUM_ENT(EF_RISCV_FLOAT_ABI_DOUBLE, "double-float ABI"), 1814 ENUM_ENT(EF_RISCV_FLOAT_ABI_QUAD, "quad-float ABI"), 1815 ENUM_ENT(EF_RISCV_RVE, "RVE") 1816 }; 1817 1818 static const EnumEntry<unsigned> ElfSymOtherFlags[] = { 1819 LLVM_READOBJ_ENUM_ENT(ELF, STV_INTERNAL), 1820 LLVM_READOBJ_ENUM_ENT(ELF, STV_HIDDEN), 1821 LLVM_READOBJ_ENUM_ENT(ELF, STV_PROTECTED) 1822 }; 1823 1824 static const EnumEntry<unsigned> ElfMipsSymOtherFlags[] = { 1825 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1826 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1827 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PIC), 1828 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MICROMIPS) 1829 }; 1830 1831 static const EnumEntry<unsigned> ElfMips16SymOtherFlags[] = { 1832 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL), 1833 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT), 1834 LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MIPS16) 1835 }; 1836 1837 static const char *getElfMipsOptionsOdkType(unsigned Odk) { 1838 switch (Odk) { 1839 LLVM_READOBJ_ENUM_CASE(ELF, ODK_NULL); 1840 LLVM_READOBJ_ENUM_CASE(ELF, ODK_REGINFO); 1841 LLVM_READOBJ_ENUM_CASE(ELF, ODK_EXCEPTIONS); 1842 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAD); 1843 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWPATCH); 1844 LLVM_READOBJ_ENUM_CASE(ELF, ODK_FILL); 1845 LLVM_READOBJ_ENUM_CASE(ELF, ODK_TAGS); 1846 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWAND); 1847 LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWOR); 1848 LLVM_READOBJ_ENUM_CASE(ELF, ODK_GP_GROUP); 1849 LLVM_READOBJ_ENUM_CASE(ELF, ODK_IDENT); 1850 LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAGESIZE); 1851 default: 1852 return "Unknown"; 1853 } 1854 } 1855 1856 template <typename ELFT> 1857 std::pair<const typename ELFT::Phdr *, const typename ELFT::Shdr *> 1858 ELFDumper<ELFT>::findDynamic(const ELFFile<ELFT> *Obj) { 1859 // Try to locate the PT_DYNAMIC header. 1860 const Elf_Phdr *DynamicPhdr = nullptr; 1861 for (const Elf_Phdr &Phdr : 1862 unwrapOrError(ObjF->getFileName(), Obj->program_headers())) { 1863 if (Phdr.p_type != ELF::PT_DYNAMIC) 1864 continue; 1865 DynamicPhdr = &Phdr; 1866 break; 1867 } 1868 1869 // Try to locate the .dynamic section in the sections header table. 1870 const Elf_Shdr *DynamicSec = nullptr; 1871 for (const Elf_Shdr &Sec : 1872 unwrapOrError(ObjF->getFileName(), Obj->sections())) { 1873 if (Sec.sh_type != ELF::SHT_DYNAMIC) 1874 continue; 1875 DynamicSec = &Sec; 1876 break; 1877 } 1878 1879 if (DynamicPhdr && DynamicPhdr->p_offset + DynamicPhdr->p_filesz > 1880 ObjF->getMemoryBufferRef().getBufferSize()) { 1881 reportWarning( 1882 createError( 1883 "PT_DYNAMIC segment offset + size exceeds the size of the file"), 1884 ObjF->getFileName()); 1885 // Don't use the broken dynamic header. 1886 DynamicPhdr = nullptr; 1887 } 1888 1889 if (DynamicPhdr && DynamicSec) { 1890 StringRef Name = 1891 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DynamicSec)); 1892 if (DynamicSec->sh_addr + DynamicSec->sh_size > 1893 DynamicPhdr->p_vaddr + DynamicPhdr->p_memsz || 1894 DynamicSec->sh_addr < DynamicPhdr->p_vaddr) 1895 reportWarning(createError("The SHT_DYNAMIC section '" + Name + 1896 "' is not contained within the " 1897 "PT_DYNAMIC segment"), 1898 ObjF->getFileName()); 1899 1900 if (DynamicSec->sh_addr != DynamicPhdr->p_vaddr) 1901 reportWarning(createError("The SHT_DYNAMIC section '" + Name + 1902 "' is not at the start of " 1903 "PT_DYNAMIC segment"), 1904 ObjF->getFileName()); 1905 } 1906 1907 return std::make_pair(DynamicPhdr, DynamicSec); 1908 } 1909 1910 template <typename ELFT> 1911 void ELFDumper<ELFT>::loadDynamicTable(const ELFFile<ELFT> *Obj) { 1912 const Elf_Phdr *DynamicPhdr; 1913 const Elf_Shdr *DynamicSec; 1914 std::tie(DynamicPhdr, DynamicSec) = findDynamic(Obj); 1915 if (!DynamicPhdr && !DynamicSec) 1916 return; 1917 1918 DynRegionInfo FromPhdr(ObjF->getFileName()); 1919 bool IsPhdrTableValid = false; 1920 if (DynamicPhdr) { 1921 FromPhdr = createDRIFrom(DynamicPhdr, sizeof(Elf_Dyn)); 1922 FromPhdr.SizePrintName = "PT_DYNAMIC size"; 1923 FromPhdr.EntSizePrintName = ""; 1924 1925 IsPhdrTableValid = !FromPhdr.getAsArrayRef<Elf_Dyn>().empty(); 1926 } 1927 1928 // Locate the dynamic table described in a section header. 1929 // Ignore sh_entsize and use the expected value for entry size explicitly. 1930 // This allows us to dump dynamic sections with a broken sh_entsize 1931 // field. 1932 DynRegionInfo FromSec(ObjF->getFileName()); 1933 bool IsSecTableValid = false; 1934 if (DynamicSec) { 1935 FromSec = 1936 checkDRI({ObjF->getELFFile()->base() + DynamicSec->sh_offset, 1937 DynamicSec->sh_size, sizeof(Elf_Dyn), ObjF->getFileName()}); 1938 FromSec.Context = ("section with index " + 1939 Twine(DynamicSec - &cantFail(Obj->sections()).front())) 1940 .str(); 1941 FromSec.EntSizePrintName = ""; 1942 1943 IsSecTableValid = !FromSec.getAsArrayRef<Elf_Dyn>().empty(); 1944 } 1945 1946 // When we only have information from one of the SHT_DYNAMIC section header or 1947 // PT_DYNAMIC program header, just use that. 1948 if (!DynamicPhdr || !DynamicSec) { 1949 if ((DynamicPhdr && IsPhdrTableValid) || (DynamicSec && IsSecTableValid)) { 1950 DynamicTable = DynamicPhdr ? FromPhdr : FromSec; 1951 parseDynamicTable(Obj); 1952 } else { 1953 reportWarning(createError("no valid dynamic table was found"), 1954 ObjF->getFileName()); 1955 } 1956 return; 1957 } 1958 1959 // At this point we have tables found from the section header and from the 1960 // dynamic segment. Usually they match, but we have to do sanity checks to 1961 // verify that. 1962 1963 if (FromPhdr.Addr != FromSec.Addr) 1964 reportWarning(createError("SHT_DYNAMIC section header and PT_DYNAMIC " 1965 "program header disagree about " 1966 "the location of the dynamic table"), 1967 ObjF->getFileName()); 1968 1969 if (!IsPhdrTableValid && !IsSecTableValid) { 1970 reportWarning(createError("no valid dynamic table was found"), 1971 ObjF->getFileName()); 1972 return; 1973 } 1974 1975 // Information in the PT_DYNAMIC program header has priority over the information 1976 // in a section header. 1977 if (IsPhdrTableValid) { 1978 if (!IsSecTableValid) 1979 reportWarning( 1980 createError( 1981 "SHT_DYNAMIC dynamic table is invalid: PT_DYNAMIC will be used"), 1982 ObjF->getFileName()); 1983 DynamicTable = FromPhdr; 1984 } else { 1985 reportWarning( 1986 createError( 1987 "PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used"), 1988 ObjF->getFileName()); 1989 DynamicTable = FromSec; 1990 } 1991 1992 parseDynamicTable(Obj); 1993 } 1994 1995 template <typename ELFT> 1996 ELFDumper<ELFT>::ELFDumper(const object::ELFObjectFile<ELFT> *ObjF, 1997 ScopedPrinter &Writer) 1998 : ObjDumper(Writer), ObjF(ObjF), DynRelRegion(ObjF->getFileName()), 1999 DynRelaRegion(ObjF->getFileName()), DynRelrRegion(ObjF->getFileName()), 2000 DynPLTRelRegion(ObjF->getFileName()), DynamicTable(ObjF->getFileName()) { 2001 // Dumper reports all non-critical errors as warnings. 2002 // It does not print the same warning more than once. 2003 WarningHandler = [this](const Twine &Msg) { 2004 if (Warnings.insert(Msg.str()).second) 2005 reportWarning(createError(Msg), this->ObjF->getFileName()); 2006 return Error::success(); 2007 }; 2008 2009 if (opts::Output == opts::GNU) 2010 ELFDumperStyle.reset(new GNUStyle<ELFT>(Writer, this)); 2011 else 2012 ELFDumperStyle.reset(new LLVMStyle<ELFT>(Writer, this)); 2013 2014 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2015 typename ELFT::ShdrRange Sections = 2016 unwrapOrError(ObjF->getFileName(), Obj->sections()); 2017 for (const Elf_Shdr &Sec : Sections) { 2018 switch (Sec.sh_type) { 2019 case ELF::SHT_SYMTAB: 2020 if (!DotSymtabSec) 2021 DotSymtabSec = &Sec; 2022 break; 2023 case ELF::SHT_DYNSYM: 2024 if (!DynSymRegion) { 2025 DynSymRegion = createDRIFrom(&Sec); 2026 DynSymRegion->Context = 2027 ("section with index " + Twine(&Sec - &Sections.front())).str(); 2028 // This is only used (if Elf_Shdr present)for naming section in GNU 2029 // style 2030 DynSymtabName = 2031 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec)); 2032 2033 if (Expected<StringRef> E = Obj->getStringTableForSymtab(Sec)) 2034 DynamicStringTable = *E; 2035 else 2036 reportWarning(E.takeError(), ObjF->getFileName()); 2037 } 2038 break; 2039 case ELF::SHT_SYMTAB_SHNDX: 2040 ShndxTable = unwrapOrError(ObjF->getFileName(), Obj->getSHNDXTable(Sec)); 2041 break; 2042 case ELF::SHT_GNU_versym: 2043 if (!SymbolVersionSection) 2044 SymbolVersionSection = &Sec; 2045 break; 2046 case ELF::SHT_GNU_verdef: 2047 if (!SymbolVersionDefSection) 2048 SymbolVersionDefSection = &Sec; 2049 break; 2050 case ELF::SHT_GNU_verneed: 2051 if (!SymbolVersionNeedSection) 2052 SymbolVersionNeedSection = &Sec; 2053 break; 2054 case ELF::SHT_LLVM_CALL_GRAPH_PROFILE: 2055 if (!DotCGProfileSec) 2056 DotCGProfileSec = &Sec; 2057 break; 2058 case ELF::SHT_LLVM_ADDRSIG: 2059 if (!DotAddrsigSec) 2060 DotAddrsigSec = &Sec; 2061 break; 2062 } 2063 } 2064 2065 loadDynamicTable(Obj); 2066 } 2067 2068 template <typename ELFT> 2069 void ELFDumper<ELFT>::parseDynamicTable(const ELFFile<ELFT> *Obj) { 2070 auto toMappedAddr = [&](uint64_t Tag, uint64_t VAddr) -> const uint8_t * { 2071 auto MappedAddrOrError = ObjF->getELFFile()->toMappedAddr(VAddr); 2072 if (!MappedAddrOrError) { 2073 Error Err = 2074 createError("Unable to parse DT_" + Obj->getDynamicTagAsString(Tag) + 2075 ": " + llvm::toString(MappedAddrOrError.takeError())); 2076 2077 reportWarning(std::move(Err), ObjF->getFileName()); 2078 return nullptr; 2079 } 2080 return MappedAddrOrError.get(); 2081 }; 2082 2083 uint64_t SONameOffset = 0; 2084 const char *StringTableBegin = nullptr; 2085 uint64_t StringTableSize = 0; 2086 Optional<DynRegionInfo> DynSymFromTable; 2087 for (const Elf_Dyn &Dyn : dynamic_table()) { 2088 switch (Dyn.d_tag) { 2089 case ELF::DT_HASH: 2090 HashTable = reinterpret_cast<const Elf_Hash *>( 2091 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2092 break; 2093 case ELF::DT_GNU_HASH: 2094 GnuHashTable = reinterpret_cast<const Elf_GnuHash *>( 2095 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2096 break; 2097 case ELF::DT_STRTAB: 2098 StringTableBegin = reinterpret_cast<const char *>( 2099 toMappedAddr(Dyn.getTag(), Dyn.getPtr())); 2100 break; 2101 case ELF::DT_STRSZ: 2102 StringTableSize = Dyn.getVal(); 2103 break; 2104 case ELF::DT_SYMTAB: { 2105 // If we can't map the DT_SYMTAB value to an address (e.g. when there are 2106 // no program headers), we ignore its value. 2107 if (const uint8_t *VA = toMappedAddr(Dyn.getTag(), Dyn.getPtr())) { 2108 DynSymFromTable.emplace(ObjF->getFileName()); 2109 DynSymFromTable->Addr = VA; 2110 DynSymFromTable->EntSize = sizeof(Elf_Sym); 2111 DynSymFromTable->EntSizePrintName = ""; 2112 } 2113 break; 2114 } 2115 case ELF::DT_SYMENT: { 2116 uint64_t Val = Dyn.getVal(); 2117 if (Val != sizeof(Elf_Sym)) 2118 reportWarning(createError("DT_SYMENT value of 0x" + 2119 Twine::utohexstr(Val) + 2120 " is not the size of a symbol (0x" + 2121 Twine::utohexstr(sizeof(Elf_Sym)) + ")"), 2122 ObjF->getFileName()); 2123 break; 2124 } 2125 case ELF::DT_RELA: 2126 DynRelaRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2127 break; 2128 case ELF::DT_RELASZ: 2129 DynRelaRegion.Size = Dyn.getVal(); 2130 DynRelaRegion.SizePrintName = "DT_RELASZ value"; 2131 break; 2132 case ELF::DT_RELAENT: 2133 DynRelaRegion.EntSize = Dyn.getVal(); 2134 DynRelaRegion.EntSizePrintName = "DT_RELAENT value"; 2135 break; 2136 case ELF::DT_SONAME: 2137 SONameOffset = Dyn.getVal(); 2138 break; 2139 case ELF::DT_REL: 2140 DynRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2141 break; 2142 case ELF::DT_RELSZ: 2143 DynRelRegion.Size = Dyn.getVal(); 2144 DynRelRegion.SizePrintName = "DT_RELSZ value"; 2145 break; 2146 case ELF::DT_RELENT: 2147 DynRelRegion.EntSize = Dyn.getVal(); 2148 DynRelRegion.EntSizePrintName = "DT_RELENT value"; 2149 break; 2150 case ELF::DT_RELR: 2151 case ELF::DT_ANDROID_RELR: 2152 DynRelrRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2153 break; 2154 case ELF::DT_RELRSZ: 2155 case ELF::DT_ANDROID_RELRSZ: 2156 DynRelrRegion.Size = Dyn.getVal(); 2157 DynRelrRegion.SizePrintName = Dyn.d_tag == ELF::DT_RELRSZ 2158 ? "DT_RELRSZ value" 2159 : "DT_ANDROID_RELRSZ value"; 2160 break; 2161 case ELF::DT_RELRENT: 2162 case ELF::DT_ANDROID_RELRENT: 2163 DynRelrRegion.EntSize = Dyn.getVal(); 2164 DynRelrRegion.EntSizePrintName = Dyn.d_tag == ELF::DT_RELRENT 2165 ? "DT_RELRENT value" 2166 : "DT_ANDROID_RELRENT value"; 2167 break; 2168 case ELF::DT_PLTREL: 2169 if (Dyn.getVal() == DT_REL) 2170 DynPLTRelRegion.EntSize = sizeof(Elf_Rel); 2171 else if (Dyn.getVal() == DT_RELA) 2172 DynPLTRelRegion.EntSize = sizeof(Elf_Rela); 2173 else 2174 reportError(createError(Twine("unknown DT_PLTREL value of ") + 2175 Twine((uint64_t)Dyn.getVal())), 2176 ObjF->getFileName()); 2177 DynPLTRelRegion.EntSizePrintName = ""; 2178 break; 2179 case ELF::DT_JMPREL: 2180 DynPLTRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr()); 2181 break; 2182 case ELF::DT_PLTRELSZ: 2183 DynPLTRelRegion.Size = Dyn.getVal(); 2184 DynPLTRelRegion.SizePrintName = "DT_PLTRELSZ value"; 2185 break; 2186 } 2187 } 2188 if (StringTableBegin) 2189 DynamicStringTable = StringRef(StringTableBegin, StringTableSize); 2190 SOName = getDynamicString(SONameOffset); 2191 2192 if (DynSymRegion) { 2193 // Often we find the information about the dynamic symbol table 2194 // location in the SHT_DYNSYM section header. However, the value in 2195 // DT_SYMTAB has priority, because it is used by dynamic loaders to 2196 // locate .dynsym at runtime. The location we find in the section header 2197 // and the location we find here should match. 2198 if (DynSymFromTable && DynSymFromTable->Addr != DynSymRegion->Addr) 2199 reportUniqueWarning( 2200 createError("SHT_DYNSYM section header and DT_SYMTAB disagree about " 2201 "the location of the dynamic symbol table")); 2202 2203 // According to the ELF gABI: "The number of symbol table entries should 2204 // equal nchain". Check to see if the DT_HASH hash table nchain value 2205 // conflicts with the number of symbols in the dynamic symbol table 2206 // according to the section header. 2207 if (HashTable && 2208 HashTable->nchain != DynSymRegion->Size / DynSymRegion->EntSize) 2209 reportUniqueWarning(createError( 2210 "hash table nchain (" + Twine(HashTable->nchain) + 2211 ") differs from symbol count derived from SHT_DYNSYM section " 2212 "header (" + 2213 Twine(DynSymRegion->Size / DynSymRegion->EntSize) + ")")); 2214 } 2215 2216 // Delay the creation of the actual dynamic symbol table until now, so that 2217 // checks can always be made against the section header-based properties, 2218 // without worrying about tag order. 2219 if (DynSymFromTable) { 2220 if (!DynSymRegion) { 2221 DynSymRegion = DynSymFromTable; 2222 } else { 2223 DynSymRegion->Addr = DynSymFromTable->Addr; 2224 DynSymRegion->EntSize = DynSymFromTable->EntSize; 2225 DynSymRegion->EntSizePrintName = DynSymFromTable->EntSizePrintName; 2226 } 2227 } 2228 2229 // Derive the dynamic symbol table size from the DT_HASH hash table, if 2230 // present. 2231 if (HashTable && DynSymRegion) 2232 DynSymRegion->Size = HashTable->nchain * DynSymRegion->EntSize; 2233 } 2234 2235 template <typename ELFT> 2236 typename ELFDumper<ELFT>::Elf_Rel_Range ELFDumper<ELFT>::dyn_rels() const { 2237 return DynRelRegion.getAsArrayRef<Elf_Rel>(); 2238 } 2239 2240 template <typename ELFT> 2241 typename ELFDumper<ELFT>::Elf_Rela_Range ELFDumper<ELFT>::dyn_relas() const { 2242 return DynRelaRegion.getAsArrayRef<Elf_Rela>(); 2243 } 2244 2245 template <typename ELFT> 2246 typename ELFDumper<ELFT>::Elf_Relr_Range ELFDumper<ELFT>::dyn_relrs() const { 2247 return DynRelrRegion.getAsArrayRef<Elf_Relr>(); 2248 } 2249 2250 template <class ELFT> void ELFDumper<ELFT>::printFileHeaders() { 2251 ELFDumperStyle->printFileHeaders(ObjF->getELFFile()); 2252 } 2253 2254 template <class ELFT> void ELFDumper<ELFT>::printSectionHeaders() { 2255 ELFDumperStyle->printSectionHeaders(ObjF->getELFFile()); 2256 } 2257 2258 template <class ELFT> void ELFDumper<ELFT>::printRelocations() { 2259 ELFDumperStyle->printRelocations(ObjF->getELFFile()); 2260 } 2261 2262 template <class ELFT> 2263 void ELFDumper<ELFT>::printProgramHeaders( 2264 bool PrintProgramHeaders, cl::boolOrDefault PrintSectionMapping) { 2265 ELFDumperStyle->printProgramHeaders(ObjF->getELFFile(), PrintProgramHeaders, 2266 PrintSectionMapping); 2267 } 2268 2269 template <typename ELFT> void ELFDumper<ELFT>::printVersionInfo() { 2270 // Dump version symbol section. 2271 ELFDumperStyle->printVersionSymbolSection(ObjF->getELFFile(), 2272 SymbolVersionSection); 2273 2274 // Dump version definition section. 2275 ELFDumperStyle->printVersionDefinitionSection(ObjF->getELFFile(), 2276 SymbolVersionDefSection); 2277 2278 // Dump version dependency section. 2279 ELFDumperStyle->printVersionDependencySection(ObjF->getELFFile(), 2280 SymbolVersionNeedSection); 2281 } 2282 2283 template <class ELFT> void ELFDumper<ELFT>::printDependentLibs() { 2284 ELFDumperStyle->printDependentLibs(ObjF->getELFFile()); 2285 } 2286 2287 template <class ELFT> void ELFDumper<ELFT>::printDynamicRelocations() { 2288 ELFDumperStyle->printDynamicRelocations(ObjF->getELFFile()); 2289 } 2290 2291 template <class ELFT> 2292 void ELFDumper<ELFT>::printSymbols(bool PrintSymbols, 2293 bool PrintDynamicSymbols) { 2294 ELFDumperStyle->printSymbols(ObjF->getELFFile(), PrintSymbols, 2295 PrintDynamicSymbols); 2296 } 2297 2298 template <class ELFT> void ELFDumper<ELFT>::printHashSymbols() { 2299 ELFDumperStyle->printHashSymbols(ObjF->getELFFile()); 2300 } 2301 2302 template <class ELFT> void ELFDumper<ELFT>::printHashHistograms() { 2303 ELFDumperStyle->printHashHistograms(ObjF->getELFFile()); 2304 } 2305 2306 template <class ELFT> void ELFDumper<ELFT>::printCGProfile() { 2307 ELFDumperStyle->printCGProfile(ObjF->getELFFile()); 2308 } 2309 2310 template <class ELFT> void ELFDumper<ELFT>::printNotes() { 2311 ELFDumperStyle->printNotes(ObjF->getELFFile()); 2312 } 2313 2314 template <class ELFT> void ELFDumper<ELFT>::printELFLinkerOptions() { 2315 ELFDumperStyle->printELFLinkerOptions(ObjF->getELFFile()); 2316 } 2317 2318 template <class ELFT> void ELFDumper<ELFT>::printStackSizes() { 2319 ELFDumperStyle->printStackSizes(ObjF); 2320 } 2321 2322 #define LLVM_READOBJ_DT_FLAG_ENT(prefix, enum) \ 2323 { #enum, prefix##_##enum } 2324 2325 static const EnumEntry<unsigned> ElfDynamicDTFlags[] = { 2326 LLVM_READOBJ_DT_FLAG_ENT(DF, ORIGIN), 2327 LLVM_READOBJ_DT_FLAG_ENT(DF, SYMBOLIC), 2328 LLVM_READOBJ_DT_FLAG_ENT(DF, TEXTREL), 2329 LLVM_READOBJ_DT_FLAG_ENT(DF, BIND_NOW), 2330 LLVM_READOBJ_DT_FLAG_ENT(DF, STATIC_TLS) 2331 }; 2332 2333 static const EnumEntry<unsigned> ElfDynamicDTFlags1[] = { 2334 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOW), 2335 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAL), 2336 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GROUP), 2337 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODELETE), 2338 LLVM_READOBJ_DT_FLAG_ENT(DF_1, LOADFLTR), 2339 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INITFIRST), 2340 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOOPEN), 2341 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ORIGIN), 2342 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DIRECT), 2343 LLVM_READOBJ_DT_FLAG_ENT(DF_1, TRANS), 2344 LLVM_READOBJ_DT_FLAG_ENT(DF_1, INTERPOSE), 2345 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODEFLIB), 2346 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODUMP), 2347 LLVM_READOBJ_DT_FLAG_ENT(DF_1, CONFALT), 2348 LLVM_READOBJ_DT_FLAG_ENT(DF_1, ENDFILTEE), 2349 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELDNE), 2350 LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELPND), 2351 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODIRECT), 2352 LLVM_READOBJ_DT_FLAG_ENT(DF_1, IGNMULDEF), 2353 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOKSYMS), 2354 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOHDR), 2355 LLVM_READOBJ_DT_FLAG_ENT(DF_1, EDITED), 2356 LLVM_READOBJ_DT_FLAG_ENT(DF_1, NORELOC), 2357 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SYMINTPOSE), 2358 LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAUDIT), 2359 LLVM_READOBJ_DT_FLAG_ENT(DF_1, SINGLETON), 2360 LLVM_READOBJ_DT_FLAG_ENT(DF_1, PIE), 2361 }; 2362 2363 static const EnumEntry<unsigned> ElfDynamicDTMipsFlags[] = { 2364 LLVM_READOBJ_DT_FLAG_ENT(RHF, NONE), 2365 LLVM_READOBJ_DT_FLAG_ENT(RHF, QUICKSTART), 2366 LLVM_READOBJ_DT_FLAG_ENT(RHF, NOTPOT), 2367 LLVM_READOBJ_DT_FLAG_ENT(RHS, NO_LIBRARY_REPLACEMENT), 2368 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_MOVE), 2369 LLVM_READOBJ_DT_FLAG_ENT(RHF, SGI_ONLY), 2370 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_INIT), 2371 LLVM_READOBJ_DT_FLAG_ENT(RHF, DELTA_C_PLUS_PLUS), 2372 LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_START_INIT), 2373 LLVM_READOBJ_DT_FLAG_ENT(RHF, PIXIE), 2374 LLVM_READOBJ_DT_FLAG_ENT(RHF, DEFAULT_DELAY_LOAD), 2375 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTART), 2376 LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTARTED), 2377 LLVM_READOBJ_DT_FLAG_ENT(RHF, CORD), 2378 LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_UNRES_UNDEF), 2379 LLVM_READOBJ_DT_FLAG_ENT(RHF, RLD_ORDER_SAFE) 2380 }; 2381 2382 #undef LLVM_READOBJ_DT_FLAG_ENT 2383 2384 template <typename T, typename TFlag> 2385 void printFlags(T Value, ArrayRef<EnumEntry<TFlag>> Flags, raw_ostream &OS) { 2386 using FlagEntry = EnumEntry<TFlag>; 2387 using FlagVector = SmallVector<FlagEntry, 10>; 2388 FlagVector SetFlags; 2389 2390 for (const auto &Flag : Flags) { 2391 if (Flag.Value == 0) 2392 continue; 2393 2394 if ((Value & Flag.Value) == Flag.Value) 2395 SetFlags.push_back(Flag); 2396 } 2397 2398 for (const auto &Flag : SetFlags) { 2399 OS << Flag.Name << " "; 2400 } 2401 } 2402 2403 template <class ELFT> 2404 std::string ELFDumper<ELFT>::getDynamicEntry(uint64_t Type, 2405 uint64_t Value) const { 2406 auto FormatHexValue = [](uint64_t V) { 2407 std::string Str; 2408 raw_string_ostream OS(Str); 2409 const char *ConvChar = 2410 (opts::Output == opts::GNU) ? "0x%" PRIx64 : "0x%" PRIX64; 2411 OS << format(ConvChar, V); 2412 return OS.str(); 2413 }; 2414 2415 auto FormatFlags = [](uint64_t V, 2416 llvm::ArrayRef<llvm::EnumEntry<unsigned int>> Array) { 2417 std::string Str; 2418 raw_string_ostream OS(Str); 2419 printFlags(V, Array, OS); 2420 return OS.str(); 2421 }; 2422 2423 // Handle custom printing of architecture specific tags 2424 switch (ObjF->getELFFile()->getHeader()->e_machine) { 2425 case EM_AARCH64: 2426 switch (Type) { 2427 case DT_AARCH64_BTI_PLT: 2428 case DT_AARCH64_PAC_PLT: 2429 return std::to_string(Value); 2430 default: 2431 break; 2432 } 2433 break; 2434 case EM_HEXAGON: 2435 switch (Type) { 2436 case DT_HEXAGON_VER: 2437 return std::to_string(Value); 2438 case DT_HEXAGON_SYMSZ: 2439 case DT_HEXAGON_PLT: 2440 return FormatHexValue(Value); 2441 default: 2442 break; 2443 } 2444 break; 2445 case EM_MIPS: 2446 switch (Type) { 2447 case DT_MIPS_RLD_VERSION: 2448 case DT_MIPS_LOCAL_GOTNO: 2449 case DT_MIPS_SYMTABNO: 2450 case DT_MIPS_UNREFEXTNO: 2451 return std::to_string(Value); 2452 case DT_MIPS_TIME_STAMP: 2453 case DT_MIPS_ICHECKSUM: 2454 case DT_MIPS_IVERSION: 2455 case DT_MIPS_BASE_ADDRESS: 2456 case DT_MIPS_MSYM: 2457 case DT_MIPS_CONFLICT: 2458 case DT_MIPS_LIBLIST: 2459 case DT_MIPS_CONFLICTNO: 2460 case DT_MIPS_LIBLISTNO: 2461 case DT_MIPS_GOTSYM: 2462 case DT_MIPS_HIPAGENO: 2463 case DT_MIPS_RLD_MAP: 2464 case DT_MIPS_DELTA_CLASS: 2465 case DT_MIPS_DELTA_CLASS_NO: 2466 case DT_MIPS_DELTA_INSTANCE: 2467 case DT_MIPS_DELTA_RELOC: 2468 case DT_MIPS_DELTA_RELOC_NO: 2469 case DT_MIPS_DELTA_SYM: 2470 case DT_MIPS_DELTA_SYM_NO: 2471 case DT_MIPS_DELTA_CLASSSYM: 2472 case DT_MIPS_DELTA_CLASSSYM_NO: 2473 case DT_MIPS_CXX_FLAGS: 2474 case DT_MIPS_PIXIE_INIT: 2475 case DT_MIPS_SYMBOL_LIB: 2476 case DT_MIPS_LOCALPAGE_GOTIDX: 2477 case DT_MIPS_LOCAL_GOTIDX: 2478 case DT_MIPS_HIDDEN_GOTIDX: 2479 case DT_MIPS_PROTECTED_GOTIDX: 2480 case DT_MIPS_OPTIONS: 2481 case DT_MIPS_INTERFACE: 2482 case DT_MIPS_DYNSTR_ALIGN: 2483 case DT_MIPS_INTERFACE_SIZE: 2484 case DT_MIPS_RLD_TEXT_RESOLVE_ADDR: 2485 case DT_MIPS_PERF_SUFFIX: 2486 case DT_MIPS_COMPACT_SIZE: 2487 case DT_MIPS_GP_VALUE: 2488 case DT_MIPS_AUX_DYNAMIC: 2489 case DT_MIPS_PLTGOT: 2490 case DT_MIPS_RWPLT: 2491 case DT_MIPS_RLD_MAP_REL: 2492 return FormatHexValue(Value); 2493 case DT_MIPS_FLAGS: 2494 return FormatFlags(Value, makeArrayRef(ElfDynamicDTMipsFlags)); 2495 default: 2496 break; 2497 } 2498 break; 2499 default: 2500 break; 2501 } 2502 2503 switch (Type) { 2504 case DT_PLTREL: 2505 if (Value == DT_REL) 2506 return "REL"; 2507 if (Value == DT_RELA) 2508 return "RELA"; 2509 LLVM_FALLTHROUGH; 2510 case DT_PLTGOT: 2511 case DT_HASH: 2512 case DT_STRTAB: 2513 case DT_SYMTAB: 2514 case DT_RELA: 2515 case DT_INIT: 2516 case DT_FINI: 2517 case DT_REL: 2518 case DT_JMPREL: 2519 case DT_INIT_ARRAY: 2520 case DT_FINI_ARRAY: 2521 case DT_PREINIT_ARRAY: 2522 case DT_DEBUG: 2523 case DT_VERDEF: 2524 case DT_VERNEED: 2525 case DT_VERSYM: 2526 case DT_GNU_HASH: 2527 case DT_NULL: 2528 return FormatHexValue(Value); 2529 case DT_RELACOUNT: 2530 case DT_RELCOUNT: 2531 case DT_VERDEFNUM: 2532 case DT_VERNEEDNUM: 2533 return std::to_string(Value); 2534 case DT_PLTRELSZ: 2535 case DT_RELASZ: 2536 case DT_RELAENT: 2537 case DT_STRSZ: 2538 case DT_SYMENT: 2539 case DT_RELSZ: 2540 case DT_RELENT: 2541 case DT_INIT_ARRAYSZ: 2542 case DT_FINI_ARRAYSZ: 2543 case DT_PREINIT_ARRAYSZ: 2544 case DT_ANDROID_RELSZ: 2545 case DT_ANDROID_RELASZ: 2546 return std::to_string(Value) + " (bytes)"; 2547 case DT_NEEDED: 2548 case DT_SONAME: 2549 case DT_AUXILIARY: 2550 case DT_USED: 2551 case DT_FILTER: 2552 case DT_RPATH: 2553 case DT_RUNPATH: { 2554 const std::map<uint64_t, const char *> TagNames = { 2555 {DT_NEEDED, "Shared library"}, {DT_SONAME, "Library soname"}, 2556 {DT_AUXILIARY, "Auxiliary library"}, {DT_USED, "Not needed object"}, 2557 {DT_FILTER, "Filter library"}, {DT_RPATH, "Library rpath"}, 2558 {DT_RUNPATH, "Library runpath"}, 2559 }; 2560 2561 return (Twine(TagNames.at(Type)) + ": [" + getDynamicString(Value) + "]") 2562 .str(); 2563 } 2564 case DT_FLAGS: 2565 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags)); 2566 case DT_FLAGS_1: 2567 return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags1)); 2568 default: 2569 return FormatHexValue(Value); 2570 } 2571 } 2572 2573 template <class ELFT> 2574 StringRef ELFDumper<ELFT>::getDynamicString(uint64_t Value) const { 2575 if (DynamicStringTable.empty() && !DynamicStringTable.data()) { 2576 reportUniqueWarning(createError("string table was not found")); 2577 return "<?>"; 2578 } 2579 2580 auto WarnAndReturn = [this](const Twine &Msg, uint64_t Offset) { 2581 reportUniqueWarning(createError("string table at offset 0x" + 2582 Twine::utohexstr(Offset) + Msg)); 2583 return "<?>"; 2584 }; 2585 2586 const uint64_t FileSize = ObjF->getELFFile()->getBufSize(); 2587 const uint64_t Offset = 2588 (const uint8_t *)DynamicStringTable.data() - ObjF->getELFFile()->base(); 2589 if (DynamicStringTable.size() > FileSize - Offset) 2590 return WarnAndReturn(" with size 0x" + 2591 Twine::utohexstr(DynamicStringTable.size()) + 2592 " goes past the end of the file (0x" + 2593 Twine::utohexstr(FileSize) + ")", 2594 Offset); 2595 2596 if (Value >= DynamicStringTable.size()) 2597 return WarnAndReturn( 2598 ": unable to read the string at 0x" + Twine::utohexstr(Offset + Value) + 2599 ": it goes past the end of the table (0x" + 2600 Twine::utohexstr(Offset + DynamicStringTable.size()) + ")", 2601 Offset); 2602 2603 if (DynamicStringTable.back() != '\0') 2604 return WarnAndReturn(": unable to read the string at 0x" + 2605 Twine::utohexstr(Offset + Value) + 2606 ": the string table is not null-terminated", 2607 Offset); 2608 2609 return DynamicStringTable.data() + Value; 2610 } 2611 2612 template <class ELFT> void ELFDumper<ELFT>::printUnwindInfo() { 2613 DwarfCFIEH::PrinterContext<ELFT> Ctx(W, ObjF); 2614 Ctx.printUnwindInformation(); 2615 } 2616 2617 namespace { 2618 2619 template <> void ELFDumper<ELF32LE>::printUnwindInfo() { 2620 const ELFFile<ELF32LE> *Obj = ObjF->getELFFile(); 2621 const unsigned Machine = Obj->getHeader()->e_machine; 2622 if (Machine == EM_ARM) { 2623 ARM::EHABI::PrinterContext<ELF32LE> Ctx(W, Obj, ObjF->getFileName(), 2624 DotSymtabSec); 2625 Ctx.PrintUnwindInformation(); 2626 } 2627 DwarfCFIEH::PrinterContext<ELF32LE> Ctx(W, ObjF); 2628 Ctx.printUnwindInformation(); 2629 } 2630 2631 } // end anonymous namespace 2632 2633 template <class ELFT> void ELFDumper<ELFT>::printDynamicTable() { 2634 ELFDumperStyle->printDynamic(ObjF->getELFFile()); 2635 } 2636 2637 template <class ELFT> void ELFDumper<ELFT>::printNeededLibraries() { 2638 ListScope D(W, "NeededLibraries"); 2639 2640 std::vector<StringRef> Libs; 2641 for (const auto &Entry : dynamic_table()) 2642 if (Entry.d_tag == ELF::DT_NEEDED) 2643 Libs.push_back(getDynamicString(Entry.d_un.d_val)); 2644 2645 llvm::sort(Libs); 2646 2647 for (StringRef L : Libs) 2648 W.startLine() << L << "\n"; 2649 } 2650 2651 template <class ELFT> 2652 static Error checkHashTable(const ELFFile<ELFT> *Obj, 2653 const typename ELFT::Hash *H, 2654 bool *IsHeaderValid = nullptr) { 2655 auto MakeError = [&](uint64_t Off, const Twine &Msg = "") { 2656 return createError("the hash table at offset 0x" + Twine::utohexstr(Off) + 2657 " goes past the end of the file (0x" + 2658 Twine::utohexstr(Obj->getBufSize()) + ")" + Msg); 2659 }; 2660 2661 // Each SHT_HASH section starts from two 32-bit fields: nbucket and nchain. 2662 const unsigned HeaderSize = 2 * sizeof(typename ELFT::Word); 2663 const uint64_t SecOffset = (const uint8_t *)H - Obj->base(); 2664 2665 if (IsHeaderValid) 2666 *IsHeaderValid = Obj->getBufSize() - SecOffset >= HeaderSize; 2667 2668 if (Obj->getBufSize() - SecOffset < HeaderSize) 2669 return MakeError(SecOffset); 2670 2671 if (Obj->getBufSize() - SecOffset - HeaderSize < 2672 ((uint64_t)H->nbucket + H->nchain) * sizeof(typename ELFT::Word)) 2673 return MakeError(SecOffset, ", nbucket = " + Twine(H->nbucket) + 2674 ", nchain = " + Twine(H->nchain)); 2675 return Error::success(); 2676 } 2677 2678 template <class ELFT> 2679 static Error checkGNUHashTable(const ELFFile<ELFT> *Obj, 2680 const typename ELFT::GnuHash *GnuHashTable, 2681 bool *IsHeaderValid = nullptr) { 2682 const uint8_t *TableData = reinterpret_cast<const uint8_t *>(GnuHashTable); 2683 assert(TableData >= Obj->base() && 2684 TableData < Obj->base() + Obj->getBufSize() && 2685 "GnuHashTable must always point to a location inside the file"); 2686 2687 uint64_t TableOffset = TableData - Obj->base(); 2688 if (IsHeaderValid) 2689 *IsHeaderValid = TableOffset + /*Header size:*/ 16 < Obj->getBufSize(); 2690 if (TableOffset + 16 + (uint64_t)GnuHashTable->nbuckets * 4 + 2691 (uint64_t)GnuHashTable->maskwords * sizeof(typename ELFT::Off) >= 2692 Obj->getBufSize()) 2693 return createError("unable to dump the SHT_GNU_HASH " 2694 "section at 0x" + 2695 Twine::utohexstr(TableOffset) + 2696 ": it goes past the end of the file"); 2697 return Error::success(); 2698 } 2699 2700 template <typename ELFT> void ELFDumper<ELFT>::printHashTable() { 2701 DictScope D(W, "HashTable"); 2702 if (!HashTable) 2703 return; 2704 2705 bool IsHeaderValid; 2706 Error Err = checkHashTable(ObjF->getELFFile(), HashTable, &IsHeaderValid); 2707 if (IsHeaderValid) { 2708 W.printNumber("Num Buckets", HashTable->nbucket); 2709 W.printNumber("Num Chains", HashTable->nchain); 2710 } 2711 2712 if (Err) { 2713 reportUniqueWarning(std::move(Err)); 2714 return; 2715 } 2716 2717 W.printList("Buckets", HashTable->buckets()); 2718 W.printList("Chains", HashTable->chains()); 2719 } 2720 2721 template <class ELFT> 2722 static Expected<ArrayRef<typename ELFT::Word>> 2723 getGnuHashTableChains(Optional<DynRegionInfo> DynSymRegion, 2724 const typename ELFT::GnuHash *GnuHashTable) { 2725 if (!DynSymRegion) 2726 return createError("no dynamic symbol table found"); 2727 2728 ArrayRef<typename ELFT::Sym> DynSymTable = 2729 DynSymRegion->getAsArrayRef<typename ELFT::Sym>(); 2730 size_t NumSyms = DynSymTable.size(); 2731 if (!NumSyms) 2732 return createError("the dynamic symbol table is empty"); 2733 2734 if (GnuHashTable->symndx < NumSyms) 2735 return GnuHashTable->values(NumSyms); 2736 2737 // A normal empty GNU hash table section produced by linker might have 2738 // symndx set to the number of dynamic symbols + 1 (for the zero symbol) 2739 // and have dummy null values in the Bloom filter and in the buckets 2740 // vector (or no values at all). It happens because the value of symndx is not 2741 // important for dynamic loaders when the GNU hash table is empty. They just 2742 // skip the whole object during symbol lookup. In such cases, the symndx value 2743 // is irrelevant and we should not report a warning. 2744 ArrayRef<typename ELFT::Word> Buckets = GnuHashTable->buckets(); 2745 if (!llvm::all_of(Buckets, [](typename ELFT::Word V) { return V == 0; })) 2746 return createError("the first hashed symbol index (" + 2747 Twine(GnuHashTable->symndx) + 2748 ") is larger than the number of dynamic symbols (" + 2749 Twine(NumSyms) + ")"); 2750 // There is no way to represent an array of (dynamic symbols count - symndx) 2751 // length. 2752 return ArrayRef<typename ELFT::Word>(); 2753 } 2754 2755 template <typename ELFT> 2756 void ELFDumper<ELFT>::printGnuHashTable(const object::ObjectFile *Obj) { 2757 DictScope D(W, "GnuHashTable"); 2758 if (!GnuHashTable) 2759 return; 2760 2761 bool IsHeaderValid; 2762 Error Err = 2763 checkGNUHashTable<ELFT>(ObjF->getELFFile(), GnuHashTable, &IsHeaderValid); 2764 if (IsHeaderValid) { 2765 W.printNumber("Num Buckets", GnuHashTable->nbuckets); 2766 W.printNumber("First Hashed Symbol Index", GnuHashTable->symndx); 2767 W.printNumber("Num Mask Words", GnuHashTable->maskwords); 2768 W.printNumber("Shift Count", GnuHashTable->shift2); 2769 } 2770 2771 if (Err) { 2772 reportUniqueWarning(std::move(Err)); 2773 return; 2774 } 2775 2776 ArrayRef<typename ELFT::Off> BloomFilter = GnuHashTable->filter(); 2777 W.printHexList("Bloom Filter", BloomFilter); 2778 2779 ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets(); 2780 W.printList("Buckets", Buckets); 2781 2782 Expected<ArrayRef<Elf_Word>> Chains = 2783 getGnuHashTableChains<ELFT>(DynSymRegion, GnuHashTable); 2784 if (!Chains) { 2785 reportUniqueWarning( 2786 createError("unable to dump 'Values' for the SHT_GNU_HASH " 2787 "section: " + 2788 toString(Chains.takeError()))); 2789 return; 2790 } 2791 2792 W.printHexList("Values", *Chains); 2793 } 2794 2795 template <typename ELFT> void ELFDumper<ELFT>::printLoadName() { 2796 W.printString("LoadName", SOName); 2797 } 2798 2799 template <class ELFT> void ELFDumper<ELFT>::printArchSpecificInfo() { 2800 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2801 switch (Obj->getHeader()->e_machine) { 2802 case EM_ARM: 2803 case EM_RISCV: 2804 printAttributes(); 2805 break; 2806 case EM_MIPS: { 2807 ELFDumperStyle->printMipsABIFlags(ObjF); 2808 printMipsOptions(); 2809 printMipsReginfo(); 2810 2811 MipsGOTParser<ELFT> Parser(Obj, ObjF->getFileName(), dynamic_table(), 2812 dynamic_symbols()); 2813 if (Parser.hasGot()) 2814 ELFDumperStyle->printMipsGOT(Parser); 2815 if (Parser.hasPlt()) 2816 ELFDumperStyle->printMipsPLT(Parser); 2817 break; 2818 } 2819 default: 2820 break; 2821 } 2822 } 2823 2824 namespace { 2825 2826 template <class ELFT> void ELFDumper<ELFT>::printAttributes() { 2827 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2828 if (!Obj->isLE()) { 2829 W.startLine() << "Attributes not implemented.\n"; 2830 return; 2831 } 2832 2833 const unsigned Machine = Obj->getHeader()->e_machine; 2834 assert((Machine == EM_ARM || Machine == EM_RISCV) && 2835 "Attributes not implemented."); 2836 2837 DictScope BA(W, "BuildAttributes"); 2838 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 2839 if (Sec.sh_type != ELF::SHT_ARM_ATTRIBUTES && 2840 Sec.sh_type != ELF::SHT_RISCV_ATTRIBUTES) 2841 continue; 2842 2843 ArrayRef<uint8_t> Contents = 2844 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(&Sec)); 2845 if (Contents[0] != ELFAttrs::Format_Version) { 2846 reportWarning(createError(Twine("unrecognised FormatVersion: 0x") + 2847 Twine::utohexstr(Contents[0])), 2848 ObjF->getFileName()); 2849 continue; 2850 } 2851 W.printHex("FormatVersion", Contents[0]); 2852 if (Contents.size() == 1) 2853 continue; 2854 2855 // TODO: Delete the redundant FormatVersion check above. 2856 if (Machine == EM_ARM) { 2857 if (Error E = ARMAttributeParser(&W).parse(Contents, support::little)) 2858 reportWarning(std::move(E), ObjF->getFileName()); 2859 } else if (Machine == EM_RISCV) { 2860 if (Error E = RISCVAttributeParser(&W).parse(Contents, support::little)) 2861 reportWarning(std::move(E), ObjF->getFileName()); 2862 } 2863 } 2864 } 2865 2866 template <class ELFT> class MipsGOTParser { 2867 public: 2868 TYPEDEF_ELF_TYPES(ELFT) 2869 using Entry = typename ELFO::Elf_Addr; 2870 using Entries = ArrayRef<Entry>; 2871 2872 const bool IsStatic; 2873 const ELFO * const Obj; 2874 2875 MipsGOTParser(const ELFO *Obj, StringRef FileName, Elf_Dyn_Range DynTable, 2876 Elf_Sym_Range DynSyms); 2877 2878 bool hasGot() const { return !GotEntries.empty(); } 2879 bool hasPlt() const { return !PltEntries.empty(); } 2880 2881 uint64_t getGp() const; 2882 2883 const Entry *getGotLazyResolver() const; 2884 const Entry *getGotModulePointer() const; 2885 const Entry *getPltLazyResolver() const; 2886 const Entry *getPltModulePointer() const; 2887 2888 Entries getLocalEntries() const; 2889 Entries getGlobalEntries() const; 2890 Entries getOtherEntries() const; 2891 Entries getPltEntries() const; 2892 2893 uint64_t getGotAddress(const Entry * E) const; 2894 int64_t getGotOffset(const Entry * E) const; 2895 const Elf_Sym *getGotSym(const Entry *E) const; 2896 2897 uint64_t getPltAddress(const Entry * E) const; 2898 const Elf_Sym *getPltSym(const Entry *E) const; 2899 2900 StringRef getPltStrTable() const { return PltStrTable; } 2901 2902 private: 2903 const Elf_Shdr *GotSec; 2904 size_t LocalNum; 2905 size_t GlobalNum; 2906 2907 const Elf_Shdr *PltSec; 2908 const Elf_Shdr *PltRelSec; 2909 const Elf_Shdr *PltSymTable; 2910 StringRef FileName; 2911 2912 Elf_Sym_Range GotDynSyms; 2913 StringRef PltStrTable; 2914 2915 Entries GotEntries; 2916 Entries PltEntries; 2917 }; 2918 2919 } // end anonymous namespace 2920 2921 template <class ELFT> 2922 MipsGOTParser<ELFT>::MipsGOTParser(const ELFO *Obj, StringRef FileName, 2923 Elf_Dyn_Range DynTable, 2924 Elf_Sym_Range DynSyms) 2925 : IsStatic(DynTable.empty()), Obj(Obj), GotSec(nullptr), LocalNum(0), 2926 GlobalNum(0), PltSec(nullptr), PltRelSec(nullptr), PltSymTable(nullptr), 2927 FileName(FileName) { 2928 // See "Global Offset Table" in Chapter 5 in the following document 2929 // for detailed GOT description. 2930 // ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf 2931 2932 // Find static GOT secton. 2933 if (IsStatic) { 2934 GotSec = findSectionByName(*Obj, FileName, ".got"); 2935 if (!GotSec) 2936 return; 2937 2938 ArrayRef<uint8_t> Content = 2939 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 2940 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2941 Content.size() / sizeof(Entry)); 2942 LocalNum = GotEntries.size(); 2943 return; 2944 } 2945 2946 // Lookup dynamic table tags which define GOT/PLT layouts. 2947 Optional<uint64_t> DtPltGot; 2948 Optional<uint64_t> DtLocalGotNum; 2949 Optional<uint64_t> DtGotSym; 2950 Optional<uint64_t> DtMipsPltGot; 2951 Optional<uint64_t> DtJmpRel; 2952 for (const auto &Entry : DynTable) { 2953 switch (Entry.getTag()) { 2954 case ELF::DT_PLTGOT: 2955 DtPltGot = Entry.getVal(); 2956 break; 2957 case ELF::DT_MIPS_LOCAL_GOTNO: 2958 DtLocalGotNum = Entry.getVal(); 2959 break; 2960 case ELF::DT_MIPS_GOTSYM: 2961 DtGotSym = Entry.getVal(); 2962 break; 2963 case ELF::DT_MIPS_PLTGOT: 2964 DtMipsPltGot = Entry.getVal(); 2965 break; 2966 case ELF::DT_JMPREL: 2967 DtJmpRel = Entry.getVal(); 2968 break; 2969 } 2970 } 2971 2972 // Find dynamic GOT section. 2973 if (DtPltGot || DtLocalGotNum || DtGotSym) { 2974 if (!DtPltGot) 2975 report_fatal_error("Cannot find PLTGOT dynamic table tag."); 2976 if (!DtLocalGotNum) 2977 report_fatal_error("Cannot find MIPS_LOCAL_GOTNO dynamic table tag."); 2978 if (!DtGotSym) 2979 report_fatal_error("Cannot find MIPS_GOTSYM dynamic table tag."); 2980 2981 size_t DynSymTotal = DynSyms.size(); 2982 if (*DtGotSym > DynSymTotal) 2983 reportError( 2984 createError("MIPS_GOTSYM exceeds a number of dynamic symbols"), 2985 FileName); 2986 2987 GotSec = findNotEmptySectionByAddress(Obj, FileName, *DtPltGot); 2988 if (!GotSec) 2989 reportError(createError("There is no not empty GOT section at 0x" + 2990 Twine::utohexstr(*DtPltGot)), 2991 FileName); 2992 2993 LocalNum = *DtLocalGotNum; 2994 GlobalNum = DynSymTotal - *DtGotSym; 2995 2996 ArrayRef<uint8_t> Content = 2997 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 2998 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2999 Content.size() / sizeof(Entry)); 3000 GotDynSyms = DynSyms.drop_front(*DtGotSym); 3001 } 3002 3003 // Find PLT section. 3004 if (DtMipsPltGot || DtJmpRel) { 3005 if (!DtMipsPltGot) 3006 report_fatal_error("Cannot find MIPS_PLTGOT dynamic table tag."); 3007 if (!DtJmpRel) 3008 report_fatal_error("Cannot find JMPREL dynamic table tag."); 3009 3010 PltSec = findNotEmptySectionByAddress(Obj, FileName, * DtMipsPltGot); 3011 if (!PltSec) 3012 report_fatal_error("There is no not empty PLTGOT section at 0x " + 3013 Twine::utohexstr(*DtMipsPltGot)); 3014 3015 PltRelSec = findNotEmptySectionByAddress(Obj, FileName, * DtJmpRel); 3016 if (!PltRelSec) 3017 report_fatal_error("There is no not empty RELPLT section at 0x" + 3018 Twine::utohexstr(*DtJmpRel)); 3019 3020 ArrayRef<uint8_t> PltContent = 3021 unwrapOrError(FileName, Obj->getSectionContents(PltSec)); 3022 PltEntries = Entries(reinterpret_cast<const Entry *>(PltContent.data()), 3023 PltContent.size() / sizeof(Entry)); 3024 3025 PltSymTable = unwrapOrError(FileName, Obj->getSection(PltRelSec->sh_link)); 3026 PltStrTable = 3027 unwrapOrError(FileName, Obj->getStringTableForSymtab(*PltSymTable)); 3028 } 3029 } 3030 3031 template <class ELFT> uint64_t MipsGOTParser<ELFT>::getGp() const { 3032 return GotSec->sh_addr + 0x7ff0; 3033 } 3034 3035 template <class ELFT> 3036 const typename MipsGOTParser<ELFT>::Entry * 3037 MipsGOTParser<ELFT>::getGotLazyResolver() const { 3038 return LocalNum > 0 ? &GotEntries[0] : nullptr; 3039 } 3040 3041 template <class ELFT> 3042 const typename MipsGOTParser<ELFT>::Entry * 3043 MipsGOTParser<ELFT>::getGotModulePointer() const { 3044 if (LocalNum < 2) 3045 return nullptr; 3046 const Entry &E = GotEntries[1]; 3047 if ((E >> (sizeof(Entry) * 8 - 1)) == 0) 3048 return nullptr; 3049 return &E; 3050 } 3051 3052 template <class ELFT> 3053 typename MipsGOTParser<ELFT>::Entries 3054 MipsGOTParser<ELFT>::getLocalEntries() const { 3055 size_t Skip = getGotModulePointer() ? 2 : 1; 3056 if (LocalNum - Skip <= 0) 3057 return Entries(); 3058 return GotEntries.slice(Skip, LocalNum - Skip); 3059 } 3060 3061 template <class ELFT> 3062 typename MipsGOTParser<ELFT>::Entries 3063 MipsGOTParser<ELFT>::getGlobalEntries() const { 3064 if (GlobalNum == 0) 3065 return Entries(); 3066 return GotEntries.slice(LocalNum, GlobalNum); 3067 } 3068 3069 template <class ELFT> 3070 typename MipsGOTParser<ELFT>::Entries 3071 MipsGOTParser<ELFT>::getOtherEntries() const { 3072 size_t OtherNum = GotEntries.size() - LocalNum - GlobalNum; 3073 if (OtherNum == 0) 3074 return Entries(); 3075 return GotEntries.slice(LocalNum + GlobalNum, OtherNum); 3076 } 3077 3078 template <class ELFT> 3079 uint64_t MipsGOTParser<ELFT>::getGotAddress(const Entry *E) const { 3080 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3081 return GotSec->sh_addr + Offset; 3082 } 3083 3084 template <class ELFT> 3085 int64_t MipsGOTParser<ELFT>::getGotOffset(const Entry *E) const { 3086 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3087 return Offset - 0x7ff0; 3088 } 3089 3090 template <class ELFT> 3091 const typename MipsGOTParser<ELFT>::Elf_Sym * 3092 MipsGOTParser<ELFT>::getGotSym(const Entry *E) const { 3093 int64_t Offset = std::distance(GotEntries.data(), E); 3094 return &GotDynSyms[Offset - LocalNum]; 3095 } 3096 3097 template <class ELFT> 3098 const typename MipsGOTParser<ELFT>::Entry * 3099 MipsGOTParser<ELFT>::getPltLazyResolver() const { 3100 return PltEntries.empty() ? nullptr : &PltEntries[0]; 3101 } 3102 3103 template <class ELFT> 3104 const typename MipsGOTParser<ELFT>::Entry * 3105 MipsGOTParser<ELFT>::getPltModulePointer() const { 3106 return PltEntries.size() < 2 ? nullptr : &PltEntries[1]; 3107 } 3108 3109 template <class ELFT> 3110 typename MipsGOTParser<ELFT>::Entries 3111 MipsGOTParser<ELFT>::getPltEntries() const { 3112 if (PltEntries.size() <= 2) 3113 return Entries(); 3114 return PltEntries.slice(2, PltEntries.size() - 2); 3115 } 3116 3117 template <class ELFT> 3118 uint64_t MipsGOTParser<ELFT>::getPltAddress(const Entry *E) const { 3119 int64_t Offset = std::distance(PltEntries.data(), E) * sizeof(Entry); 3120 return PltSec->sh_addr + Offset; 3121 } 3122 3123 template <class ELFT> 3124 const typename MipsGOTParser<ELFT>::Elf_Sym * 3125 MipsGOTParser<ELFT>::getPltSym(const Entry *E) const { 3126 int64_t Offset = std::distance(getPltEntries().data(), E); 3127 if (PltRelSec->sh_type == ELF::SHT_REL) { 3128 Elf_Rel_Range Rels = unwrapOrError(FileName, Obj->rels(PltRelSec)); 3129 return unwrapOrError(FileName, 3130 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3131 } else { 3132 Elf_Rela_Range Rels = unwrapOrError(FileName, Obj->relas(PltRelSec)); 3133 return unwrapOrError(FileName, 3134 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3135 } 3136 } 3137 3138 static const EnumEntry<unsigned> ElfMipsISAExtType[] = { 3139 {"None", Mips::AFL_EXT_NONE}, 3140 {"Broadcom SB-1", Mips::AFL_EXT_SB1}, 3141 {"Cavium Networks Octeon", Mips::AFL_EXT_OCTEON}, 3142 {"Cavium Networks Octeon2", Mips::AFL_EXT_OCTEON2}, 3143 {"Cavium Networks OcteonP", Mips::AFL_EXT_OCTEONP}, 3144 {"Cavium Networks Octeon3", Mips::AFL_EXT_OCTEON3}, 3145 {"LSI R4010", Mips::AFL_EXT_4010}, 3146 {"Loongson 2E", Mips::AFL_EXT_LOONGSON_2E}, 3147 {"Loongson 2F", Mips::AFL_EXT_LOONGSON_2F}, 3148 {"Loongson 3A", Mips::AFL_EXT_LOONGSON_3A}, 3149 {"MIPS R4650", Mips::AFL_EXT_4650}, 3150 {"MIPS R5900", Mips::AFL_EXT_5900}, 3151 {"MIPS R10000", Mips::AFL_EXT_10000}, 3152 {"NEC VR4100", Mips::AFL_EXT_4100}, 3153 {"NEC VR4111/VR4181", Mips::AFL_EXT_4111}, 3154 {"NEC VR4120", Mips::AFL_EXT_4120}, 3155 {"NEC VR5400", Mips::AFL_EXT_5400}, 3156 {"NEC VR5500", Mips::AFL_EXT_5500}, 3157 {"RMI Xlr", Mips::AFL_EXT_XLR}, 3158 {"Toshiba R3900", Mips::AFL_EXT_3900} 3159 }; 3160 3161 static const EnumEntry<unsigned> ElfMipsASEFlags[] = { 3162 {"DSP", Mips::AFL_ASE_DSP}, 3163 {"DSPR2", Mips::AFL_ASE_DSPR2}, 3164 {"Enhanced VA Scheme", Mips::AFL_ASE_EVA}, 3165 {"MCU", Mips::AFL_ASE_MCU}, 3166 {"MDMX", Mips::AFL_ASE_MDMX}, 3167 {"MIPS-3D", Mips::AFL_ASE_MIPS3D}, 3168 {"MT", Mips::AFL_ASE_MT}, 3169 {"SmartMIPS", Mips::AFL_ASE_SMARTMIPS}, 3170 {"VZ", Mips::AFL_ASE_VIRT}, 3171 {"MSA", Mips::AFL_ASE_MSA}, 3172 {"MIPS16", Mips::AFL_ASE_MIPS16}, 3173 {"microMIPS", Mips::AFL_ASE_MICROMIPS}, 3174 {"XPA", Mips::AFL_ASE_XPA}, 3175 {"CRC", Mips::AFL_ASE_CRC}, 3176 {"GINV", Mips::AFL_ASE_GINV}, 3177 }; 3178 3179 static const EnumEntry<unsigned> ElfMipsFpABIType[] = { 3180 {"Hard or soft float", Mips::Val_GNU_MIPS_ABI_FP_ANY}, 3181 {"Hard float (double precision)", Mips::Val_GNU_MIPS_ABI_FP_DOUBLE}, 3182 {"Hard float (single precision)", Mips::Val_GNU_MIPS_ABI_FP_SINGLE}, 3183 {"Soft float", Mips::Val_GNU_MIPS_ABI_FP_SOFT}, 3184 {"Hard float (MIPS32r2 64-bit FPU 12 callee-saved)", 3185 Mips::Val_GNU_MIPS_ABI_FP_OLD_64}, 3186 {"Hard float (32-bit CPU, Any FPU)", Mips::Val_GNU_MIPS_ABI_FP_XX}, 3187 {"Hard float (32-bit CPU, 64-bit FPU)", Mips::Val_GNU_MIPS_ABI_FP_64}, 3188 {"Hard float compat (32-bit CPU, 64-bit FPU)", 3189 Mips::Val_GNU_MIPS_ABI_FP_64A} 3190 }; 3191 3192 static const EnumEntry<unsigned> ElfMipsFlags1[] { 3193 {"ODDSPREG", Mips::AFL_FLAGS1_ODDSPREG}, 3194 }; 3195 3196 static int getMipsRegisterSize(uint8_t Flag) { 3197 switch (Flag) { 3198 case Mips::AFL_REG_NONE: 3199 return 0; 3200 case Mips::AFL_REG_32: 3201 return 32; 3202 case Mips::AFL_REG_64: 3203 return 64; 3204 case Mips::AFL_REG_128: 3205 return 128; 3206 default: 3207 return -1; 3208 } 3209 } 3210 3211 template <class ELFT> 3212 static void printMipsReginfoData(ScopedPrinter &W, 3213 const Elf_Mips_RegInfo<ELFT> &Reginfo) { 3214 W.printHex("GP", Reginfo.ri_gp_value); 3215 W.printHex("General Mask", Reginfo.ri_gprmask); 3216 W.printHex("Co-Proc Mask0", Reginfo.ri_cprmask[0]); 3217 W.printHex("Co-Proc Mask1", Reginfo.ri_cprmask[1]); 3218 W.printHex("Co-Proc Mask2", Reginfo.ri_cprmask[2]); 3219 W.printHex("Co-Proc Mask3", Reginfo.ri_cprmask[3]); 3220 } 3221 3222 template <class ELFT> void ELFDumper<ELFT>::printMipsReginfo() { 3223 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3224 const Elf_Shdr *Shdr = findSectionByName(*Obj, ObjF->getFileName(), ".reginfo"); 3225 if (!Shdr) { 3226 W.startLine() << "There is no .reginfo section in the file.\n"; 3227 return; 3228 } 3229 ArrayRef<uint8_t> Sec = 3230 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3231 if (Sec.size() != sizeof(Elf_Mips_RegInfo<ELFT>)) { 3232 W.startLine() << "The .reginfo section has a wrong size.\n"; 3233 return; 3234 } 3235 3236 DictScope GS(W, "MIPS RegInfo"); 3237 auto *Reginfo = reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(Sec.data()); 3238 printMipsReginfoData(W, *Reginfo); 3239 } 3240 3241 template <class ELFT> void ELFDumper<ELFT>::printMipsOptions() { 3242 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3243 const Elf_Shdr *Shdr = 3244 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.options"); 3245 if (!Shdr) { 3246 W.startLine() << "There is no .MIPS.options section in the file.\n"; 3247 return; 3248 } 3249 3250 DictScope GS(W, "MIPS Options"); 3251 3252 ArrayRef<uint8_t> Sec = 3253 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3254 while (!Sec.empty()) { 3255 if (Sec.size() < sizeof(Elf_Mips_Options<ELFT>)) { 3256 W.startLine() << "The .MIPS.options section has a wrong size.\n"; 3257 return; 3258 } 3259 auto *O = reinterpret_cast<const Elf_Mips_Options<ELFT> *>(Sec.data()); 3260 DictScope GS(W, getElfMipsOptionsOdkType(O->kind)); 3261 switch (O->kind) { 3262 case ODK_REGINFO: 3263 printMipsReginfoData(W, O->getRegInfo()); 3264 break; 3265 default: 3266 W.startLine() << "Unsupported MIPS options tag.\n"; 3267 break; 3268 } 3269 Sec = Sec.slice(O->size); 3270 } 3271 } 3272 3273 template <class ELFT> void ELFDumper<ELFT>::printStackMap() const { 3274 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3275 const Elf_Shdr *StackMapSection = nullptr; 3276 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 3277 StringRef Name = 3278 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec)); 3279 if (Name == ".llvm_stackmaps") { 3280 StackMapSection = &Sec; 3281 break; 3282 } 3283 } 3284 3285 if (!StackMapSection) 3286 return; 3287 3288 ArrayRef<uint8_t> StackMapContentsArray = unwrapOrError( 3289 ObjF->getFileName(), Obj->getSectionContents(StackMapSection)); 3290 3291 prettyPrintStackMap( 3292 W, StackMapParser<ELFT::TargetEndianness>(StackMapContentsArray)); 3293 } 3294 3295 template <class ELFT> void ELFDumper<ELFT>::printGroupSections() { 3296 ELFDumperStyle->printGroupSections(ObjF->getELFFile()); 3297 } 3298 3299 template <class ELFT> void ELFDumper<ELFT>::printAddrsig() { 3300 ELFDumperStyle->printAddrsig(ObjF->getELFFile()); 3301 } 3302 3303 static inline void printFields(formatted_raw_ostream &OS, StringRef Str1, 3304 StringRef Str2) { 3305 OS.PadToColumn(2u); 3306 OS << Str1; 3307 OS.PadToColumn(37u); 3308 OS << Str2 << "\n"; 3309 OS.flush(); 3310 } 3311 3312 template <class ELFT> 3313 static std::string getSectionHeadersNumString(const ELFFile<ELFT> *Obj, 3314 StringRef FileName) { 3315 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3316 if (ElfHeader->e_shnum != 0) 3317 return to_string(ElfHeader->e_shnum); 3318 3319 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3320 if (Arr.empty()) 3321 return "0"; 3322 return "0 (" + to_string(Arr[0].sh_size) + ")"; 3323 } 3324 3325 template <class ELFT> 3326 static std::string getSectionHeaderTableIndexString(const ELFFile<ELFT> *Obj, 3327 StringRef FileName) { 3328 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3329 if (ElfHeader->e_shstrndx != SHN_XINDEX) 3330 return to_string(ElfHeader->e_shstrndx); 3331 3332 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3333 if (Arr.empty()) 3334 return "65535 (corrupt: out of range)"; 3335 return to_string(ElfHeader->e_shstrndx) + " (" + to_string(Arr[0].sh_link) + 3336 ")"; 3337 } 3338 3339 template <class ELFT> void GNUStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 3340 const Elf_Ehdr *e = Obj->getHeader(); 3341 OS << "ELF Header:\n"; 3342 OS << " Magic: "; 3343 std::string Str; 3344 for (int i = 0; i < ELF::EI_NIDENT; i++) 3345 OS << format(" %02x", static_cast<int>(e->e_ident[i])); 3346 OS << "\n"; 3347 Str = printEnum(e->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 3348 printFields(OS, "Class:", Str); 3349 Str = printEnum(e->e_ident[ELF::EI_DATA], makeArrayRef(ElfDataEncoding)); 3350 printFields(OS, "Data:", Str); 3351 OS.PadToColumn(2u); 3352 OS << "Version:"; 3353 OS.PadToColumn(37u); 3354 OS << to_hexString(e->e_ident[ELF::EI_VERSION]); 3355 if (e->e_version == ELF::EV_CURRENT) 3356 OS << " (current)"; 3357 OS << "\n"; 3358 Str = printEnum(e->e_ident[ELF::EI_OSABI], makeArrayRef(ElfOSABI)); 3359 printFields(OS, "OS/ABI:", Str); 3360 printFields(OS, 3361 "ABI Version:", std::to_string(e->e_ident[ELF::EI_ABIVERSION])); 3362 Str = printEnum(e->e_type, makeArrayRef(ElfObjectFileType)); 3363 printFields(OS, "Type:", Str); 3364 Str = printEnum(e->e_machine, makeArrayRef(ElfMachineType)); 3365 printFields(OS, "Machine:", Str); 3366 Str = "0x" + to_hexString(e->e_version); 3367 printFields(OS, "Version:", Str); 3368 Str = "0x" + to_hexString(e->e_entry); 3369 printFields(OS, "Entry point address:", Str); 3370 Str = to_string(e->e_phoff) + " (bytes into file)"; 3371 printFields(OS, "Start of program headers:", Str); 3372 Str = to_string(e->e_shoff) + " (bytes into file)"; 3373 printFields(OS, "Start of section headers:", Str); 3374 std::string ElfFlags; 3375 if (e->e_machine == EM_MIPS) 3376 ElfFlags = 3377 printFlags(e->e_flags, makeArrayRef(ElfHeaderMipsFlags), 3378 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 3379 unsigned(ELF::EF_MIPS_MACH)); 3380 else if (e->e_machine == EM_RISCV) 3381 ElfFlags = printFlags(e->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 3382 Str = "0x" + to_hexString(e->e_flags); 3383 if (!ElfFlags.empty()) 3384 Str = Str + ", " + ElfFlags; 3385 printFields(OS, "Flags:", Str); 3386 Str = to_string(e->e_ehsize) + " (bytes)"; 3387 printFields(OS, "Size of this header:", Str); 3388 Str = to_string(e->e_phentsize) + " (bytes)"; 3389 printFields(OS, "Size of program headers:", Str); 3390 Str = to_string(e->e_phnum); 3391 printFields(OS, "Number of program headers:", Str); 3392 Str = to_string(e->e_shentsize) + " (bytes)"; 3393 printFields(OS, "Size of section headers:", Str); 3394 Str = getSectionHeadersNumString(Obj, this->FileName); 3395 printFields(OS, "Number of section headers:", Str); 3396 Str = getSectionHeaderTableIndexString(Obj, this->FileName); 3397 printFields(OS, "Section header string table index:", Str); 3398 } 3399 3400 namespace { 3401 struct GroupMember { 3402 StringRef Name; 3403 uint64_t Index; 3404 }; 3405 3406 struct GroupSection { 3407 StringRef Name; 3408 std::string Signature; 3409 uint64_t ShName; 3410 uint64_t Index; 3411 uint32_t Link; 3412 uint32_t Info; 3413 uint32_t Type; 3414 std::vector<GroupMember> Members; 3415 }; 3416 3417 template <class ELFT> 3418 std::vector<GroupSection> getGroups(const ELFFile<ELFT> *Obj, 3419 StringRef FileName) { 3420 using Elf_Shdr = typename ELFT::Shdr; 3421 using Elf_Sym = typename ELFT::Sym; 3422 using Elf_Word = typename ELFT::Word; 3423 3424 std::vector<GroupSection> Ret; 3425 uint64_t I = 0; 3426 for (const Elf_Shdr &Sec : unwrapOrError(FileName, Obj->sections())) { 3427 ++I; 3428 if (Sec.sh_type != ELF::SHT_GROUP) 3429 continue; 3430 3431 const Elf_Shdr *Symtab = 3432 unwrapOrError(FileName, Obj->getSection(Sec.sh_link)); 3433 StringRef StrTable = 3434 unwrapOrError(FileName, Obj->getStringTableForSymtab(*Symtab)); 3435 const Elf_Sym *Sym = unwrapOrError( 3436 FileName, Obj->template getEntry<Elf_Sym>(Symtab, Sec.sh_info)); 3437 auto Data = unwrapOrError( 3438 FileName, Obj->template getSectionContentsAsArray<Elf_Word>(&Sec)); 3439 3440 StringRef Name = unwrapOrError(FileName, Obj->getSectionName(&Sec)); 3441 StringRef Signature = StrTable.data() + Sym->st_name; 3442 Ret.push_back({Name, 3443 maybeDemangle(Signature), 3444 Sec.sh_name, 3445 I - 1, 3446 Sec.sh_link, 3447 Sec.sh_info, 3448 Data[0], 3449 {}}); 3450 3451 std::vector<GroupMember> &GM = Ret.back().Members; 3452 for (uint32_t Ndx : Data.slice(1)) { 3453 auto Sec = unwrapOrError(FileName, Obj->getSection(Ndx)); 3454 const StringRef Name = unwrapOrError(FileName, Obj->getSectionName(Sec)); 3455 GM.push_back({Name, Ndx}); 3456 } 3457 } 3458 return Ret; 3459 } 3460 3461 DenseMap<uint64_t, const GroupSection *> 3462 mapSectionsToGroups(ArrayRef<GroupSection> Groups) { 3463 DenseMap<uint64_t, const GroupSection *> Ret; 3464 for (const GroupSection &G : Groups) 3465 for (const GroupMember &GM : G.Members) 3466 Ret.insert({GM.Index, &G}); 3467 return Ret; 3468 } 3469 3470 } // namespace 3471 3472 template <class ELFT> void GNUStyle<ELFT>::printGroupSections(const ELFO *Obj) { 3473 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 3474 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 3475 for (const GroupSection &G : V) { 3476 OS << "\n" 3477 << getGroupType(G.Type) << " group section [" 3478 << format_decimal(G.Index, 5) << "] `" << G.Name << "' [" << G.Signature 3479 << "] contains " << G.Members.size() << " sections:\n" 3480 << " [Index] Name\n"; 3481 for (const GroupMember &GM : G.Members) { 3482 const GroupSection *MainGroup = Map[GM.Index]; 3483 if (MainGroup != &G) { 3484 OS.flush(); 3485 errs() << "Error: section [" << format_decimal(GM.Index, 5) 3486 << "] in group section [" << format_decimal(G.Index, 5) 3487 << "] already in group section [" 3488 << format_decimal(MainGroup->Index, 5) << "]"; 3489 errs().flush(); 3490 continue; 3491 } 3492 OS << " [" << format_decimal(GM.Index, 5) << "] " << GM.Name << "\n"; 3493 } 3494 } 3495 3496 if (V.empty()) 3497 OS << "There are no section groups in this file.\n"; 3498 } 3499 3500 template <class ELFT> 3501 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 3502 const Elf_Shdr *SymTab, const Elf_Rela &R, 3503 unsigned RelIndex, bool IsRela) { 3504 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 3505 this->dumper()->getRelocationTarget(SymTab, R); 3506 if (!Target) 3507 this->reportUniqueWarning(createError( 3508 "unable to print relocation " + Twine(RelIndex) + " in section " + 3509 Twine(SecIndex) + ": " + toString(Target.takeError()))); 3510 else 3511 printRelocation(Obj, /*Sym=*/Target->first, /*Name=*/Target->second, R, 3512 IsRela); 3513 } 3514 3515 template <class ELFT> 3516 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, const Elf_Sym *Sym, 3517 StringRef SymbolName, const Elf_Rela &R, 3518 bool IsRela) { 3519 // First two fields are bit width dependent. The rest of them are fixed width. 3520 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3521 Field Fields[5] = {0, 10 + Bias, 19 + 2 * Bias, 42 + 2 * Bias, 53 + 2 * Bias}; 3522 unsigned Width = ELFT::Is64Bits ? 16 : 8; 3523 3524 Fields[0].Str = to_string(format_hex_no_prefix(R.r_offset, Width)); 3525 Fields[1].Str = to_string(format_hex_no_prefix(R.r_info, Width)); 3526 3527 SmallString<32> RelocName; 3528 Obj->getRelocationTypeName(R.getType(Obj->isMips64EL()), RelocName); 3529 Fields[2].Str = RelocName.c_str(); 3530 3531 if (Sym) 3532 Fields[3].Str = to_string(format_hex_no_prefix(Sym->getValue(), Width)); 3533 3534 Fields[4].Str = std::string(SymbolName); 3535 for (const Field &F : Fields) 3536 printField(F); 3537 3538 std::string Addend; 3539 if (IsRela) { 3540 int64_t RelAddend = R.r_addend; 3541 if (!SymbolName.empty()) { 3542 if (R.r_addend < 0) { 3543 Addend = " - "; 3544 RelAddend = std::abs(RelAddend); 3545 } else 3546 Addend = " + "; 3547 } 3548 3549 Addend += to_hexString(RelAddend, false); 3550 } 3551 OS << Addend << "\n"; 3552 } 3553 3554 template <class ELFT> void GNUStyle<ELFT>::printRelocHeader(unsigned SType) { 3555 bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA; 3556 bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR; 3557 if (ELFT::Is64Bits) 3558 OS << " "; 3559 else 3560 OS << " "; 3561 if (IsRelr && opts::RawRelr) 3562 OS << "Data "; 3563 else 3564 OS << "Offset"; 3565 if (ELFT::Is64Bits) 3566 OS << " Info Type" 3567 << " Symbol's Value Symbol's Name"; 3568 else 3569 OS << " Info Type Sym. Value Symbol's Name"; 3570 if (IsRela) 3571 OS << " + Addend"; 3572 OS << "\n"; 3573 } 3574 3575 template <class ELFT> void GNUStyle<ELFT>::printRelocations(const ELFO *Obj) { 3576 bool HasRelocSections = false; 3577 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 3578 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 3579 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 3580 Sec.sh_type != ELF::SHT_ANDROID_RELA && 3581 Sec.sh_type != ELF::SHT_ANDROID_RELR) 3582 continue; 3583 HasRelocSections = true; 3584 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 3585 unsigned Entries = Sec.getEntityCount(); 3586 std::vector<Elf_Rela> AndroidRelas; 3587 if (Sec.sh_type == ELF::SHT_ANDROID_REL || 3588 Sec.sh_type == ELF::SHT_ANDROID_RELA) { 3589 // Android's packed relocation section needs to be unpacked first 3590 // to get the actual number of entries. 3591 AndroidRelas = unwrapOrError(this->FileName, Obj->android_relas(&Sec)); 3592 Entries = AndroidRelas.size(); 3593 } 3594 std::vector<Elf_Rela> RelrRelas; 3595 if (!opts::RawRelr && (Sec.sh_type == ELF::SHT_RELR || 3596 Sec.sh_type == ELF::SHT_ANDROID_RELR)) { 3597 // .relr.dyn relative relocation section needs to be unpacked first 3598 // to get the actual number of entries. 3599 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(&Sec)); 3600 RelrRelas = unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 3601 Entries = RelrRelas.size(); 3602 } 3603 uintX_t Offset = Sec.sh_offset; 3604 OS << "\nRelocation section '" << Name << "' at offset 0x" 3605 << to_hexString(Offset, false) << " contains " << Entries 3606 << " entries:\n"; 3607 printRelocHeader(Sec.sh_type); 3608 const Elf_Shdr *SymTab = 3609 unwrapOrError(this->FileName, Obj->getSection(Sec.sh_link)); 3610 unsigned SecNdx = &Sec - &cantFail(Obj->sections()).front(); 3611 unsigned RelNdx = 0; 3612 3613 switch (Sec.sh_type) { 3614 case ELF::SHT_REL: 3615 for (const auto &R : unwrapOrError(this->FileName, Obj->rels(&Sec))) { 3616 Elf_Rela Rela; 3617 Rela.r_offset = R.r_offset; 3618 Rela.r_info = R.r_info; 3619 Rela.r_addend = 0; 3620 printRelocation(Obj, SecNdx, SymTab, Rela, ++RelNdx, false); 3621 } 3622 break; 3623 case ELF::SHT_RELA: 3624 for (const auto &R : unwrapOrError(this->FileName, Obj->relas(&Sec))) 3625 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, true); 3626 break; 3627 case ELF::SHT_RELR: 3628 case ELF::SHT_ANDROID_RELR: 3629 if (opts::RawRelr) 3630 for (const auto &R : unwrapOrError(this->FileName, Obj->relrs(&Sec))) 3631 OS << to_string(format_hex_no_prefix(R, ELFT::Is64Bits ? 16 : 8)) 3632 << "\n"; 3633 else 3634 for (const auto &R : RelrRelas) 3635 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, false); 3636 break; 3637 case ELF::SHT_ANDROID_REL: 3638 case ELF::SHT_ANDROID_RELA: 3639 for (const auto &R : AndroidRelas) 3640 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, 3641 Sec.sh_type == ELF::SHT_ANDROID_RELA); 3642 break; 3643 } 3644 } 3645 if (!HasRelocSections) 3646 OS << "\nThere are no relocations in this file.\n"; 3647 } 3648 3649 // Print the offset of a particular section from anyone of the ranges: 3650 // [SHT_LOOS, SHT_HIOS], [SHT_LOPROC, SHT_HIPROC], [SHT_LOUSER, SHT_HIUSER]. 3651 // If 'Type' does not fall within any of those ranges, then a string is 3652 // returned as '<unknown>' followed by the type value. 3653 static std::string getSectionTypeOffsetString(unsigned Type) { 3654 if (Type >= SHT_LOOS && Type <= SHT_HIOS) 3655 return "LOOS+0x" + to_hexString(Type - SHT_LOOS); 3656 else if (Type >= SHT_LOPROC && Type <= SHT_HIPROC) 3657 return "LOPROC+0x" + to_hexString(Type - SHT_LOPROC); 3658 else if (Type >= SHT_LOUSER && Type <= SHT_HIUSER) 3659 return "LOUSER+0x" + to_hexString(Type - SHT_LOUSER); 3660 return "0x" + to_hexString(Type) + ": <unknown>"; 3661 } 3662 3663 static std::string getSectionTypeString(unsigned Arch, unsigned Type) { 3664 using namespace ELF; 3665 3666 switch (Arch) { 3667 case EM_ARM: 3668 switch (Type) { 3669 case SHT_ARM_EXIDX: 3670 return "ARM_EXIDX"; 3671 case SHT_ARM_PREEMPTMAP: 3672 return "ARM_PREEMPTMAP"; 3673 case SHT_ARM_ATTRIBUTES: 3674 return "ARM_ATTRIBUTES"; 3675 case SHT_ARM_DEBUGOVERLAY: 3676 return "ARM_DEBUGOVERLAY"; 3677 case SHT_ARM_OVERLAYSECTION: 3678 return "ARM_OVERLAYSECTION"; 3679 } 3680 break; 3681 case EM_X86_64: 3682 switch (Type) { 3683 case SHT_X86_64_UNWIND: 3684 return "X86_64_UNWIND"; 3685 } 3686 break; 3687 case EM_MIPS: 3688 case EM_MIPS_RS3_LE: 3689 switch (Type) { 3690 case SHT_MIPS_REGINFO: 3691 return "MIPS_REGINFO"; 3692 case SHT_MIPS_OPTIONS: 3693 return "MIPS_OPTIONS"; 3694 case SHT_MIPS_DWARF: 3695 return "MIPS_DWARF"; 3696 case SHT_MIPS_ABIFLAGS: 3697 return "MIPS_ABIFLAGS"; 3698 } 3699 break; 3700 case EM_RISCV: 3701 switch (Type) { 3702 case SHT_RISCV_ATTRIBUTES: 3703 return "RISCV_ATTRIBUTES"; 3704 } 3705 } 3706 switch (Type) { 3707 case SHT_NULL: 3708 return "NULL"; 3709 case SHT_PROGBITS: 3710 return "PROGBITS"; 3711 case SHT_SYMTAB: 3712 return "SYMTAB"; 3713 case SHT_STRTAB: 3714 return "STRTAB"; 3715 case SHT_RELA: 3716 return "RELA"; 3717 case SHT_HASH: 3718 return "HASH"; 3719 case SHT_DYNAMIC: 3720 return "DYNAMIC"; 3721 case SHT_NOTE: 3722 return "NOTE"; 3723 case SHT_NOBITS: 3724 return "NOBITS"; 3725 case SHT_REL: 3726 return "REL"; 3727 case SHT_SHLIB: 3728 return "SHLIB"; 3729 case SHT_DYNSYM: 3730 return "DYNSYM"; 3731 case SHT_INIT_ARRAY: 3732 return "INIT_ARRAY"; 3733 case SHT_FINI_ARRAY: 3734 return "FINI_ARRAY"; 3735 case SHT_PREINIT_ARRAY: 3736 return "PREINIT_ARRAY"; 3737 case SHT_GROUP: 3738 return "GROUP"; 3739 case SHT_SYMTAB_SHNDX: 3740 return "SYMTAB SECTION INDICES"; 3741 case SHT_ANDROID_REL: 3742 return "ANDROID_REL"; 3743 case SHT_ANDROID_RELA: 3744 return "ANDROID_RELA"; 3745 case SHT_RELR: 3746 case SHT_ANDROID_RELR: 3747 return "RELR"; 3748 case SHT_LLVM_ODRTAB: 3749 return "LLVM_ODRTAB"; 3750 case SHT_LLVM_LINKER_OPTIONS: 3751 return "LLVM_LINKER_OPTIONS"; 3752 case SHT_LLVM_CALL_GRAPH_PROFILE: 3753 return "LLVM_CALL_GRAPH_PROFILE"; 3754 case SHT_LLVM_ADDRSIG: 3755 return "LLVM_ADDRSIG"; 3756 case SHT_LLVM_DEPENDENT_LIBRARIES: 3757 return "LLVM_DEPENDENT_LIBRARIES"; 3758 case SHT_LLVM_SYMPART: 3759 return "LLVM_SYMPART"; 3760 case SHT_LLVM_PART_EHDR: 3761 return "LLVM_PART_EHDR"; 3762 case SHT_LLVM_PART_PHDR: 3763 return "LLVM_PART_PHDR"; 3764 // FIXME: Parse processor specific GNU attributes 3765 case SHT_GNU_ATTRIBUTES: 3766 return "ATTRIBUTES"; 3767 case SHT_GNU_HASH: 3768 return "GNU_HASH"; 3769 case SHT_GNU_verdef: 3770 return "VERDEF"; 3771 case SHT_GNU_verneed: 3772 return "VERNEED"; 3773 case SHT_GNU_versym: 3774 return "VERSYM"; 3775 default: 3776 return getSectionTypeOffsetString(Type); 3777 } 3778 return ""; 3779 } 3780 3781 static void printSectionDescription(formatted_raw_ostream &OS, 3782 unsigned EMachine) { 3783 OS << "Key to Flags:\n"; 3784 OS << " W (write), A (alloc), X (execute), M (merge), S (strings), I " 3785 "(info),\n"; 3786 OS << " L (link order), O (extra OS processing required), G (group), T " 3787 "(TLS),\n"; 3788 OS << " C (compressed), x (unknown), o (OS specific), E (exclude),\n"; 3789 3790 if (EMachine == EM_X86_64) 3791 OS << " l (large), "; 3792 else if (EMachine == EM_ARM) 3793 OS << " y (purecode), "; 3794 else 3795 OS << " "; 3796 3797 OS << "p (processor specific)\n"; 3798 } 3799 3800 template <class ELFT> 3801 void GNUStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 3802 unsigned Bias = ELFT::Is64Bits ? 0 : 8; 3803 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 3804 OS << "There are " << to_string(Sections.size()) 3805 << " section headers, starting at offset " 3806 << "0x" << to_hexString(Obj->getHeader()->e_shoff, false) << ":\n\n"; 3807 OS << "Section Headers:\n"; 3808 Field Fields[11] = { 3809 {"[Nr]", 2}, {"Name", 7}, {"Type", 25}, 3810 {"Address", 41}, {"Off", 58 - Bias}, {"Size", 65 - Bias}, 3811 {"ES", 72 - Bias}, {"Flg", 75 - Bias}, {"Lk", 79 - Bias}, 3812 {"Inf", 82 - Bias}, {"Al", 86 - Bias}}; 3813 for (auto &F : Fields) 3814 printField(F); 3815 OS << "\n"; 3816 3817 const ELFObjectFile<ELFT> *ElfObj = this->dumper()->getElfObject(); 3818 StringRef SecStrTable = unwrapOrError<StringRef>( 3819 ElfObj->getFileName(), 3820 Obj->getSectionStringTable(Sections, this->dumper()->WarningHandler)); 3821 size_t SectionIndex = 0; 3822 for (const Elf_Shdr &Sec : Sections) { 3823 Fields[0].Str = to_string(SectionIndex); 3824 if (SecStrTable.empty()) 3825 Fields[1].Str = "<no-strings>"; 3826 else 3827 Fields[1].Str = std::string(unwrapOrError<StringRef>( 3828 ElfObj->getFileName(), Obj->getSectionName(&Sec, SecStrTable))); 3829 Fields[2].Str = 3830 getSectionTypeString(Obj->getHeader()->e_machine, Sec.sh_type); 3831 Fields[3].Str = 3832 to_string(format_hex_no_prefix(Sec.sh_addr, ELFT::Is64Bits ? 16 : 8)); 3833 Fields[4].Str = to_string(format_hex_no_prefix(Sec.sh_offset, 6)); 3834 Fields[5].Str = to_string(format_hex_no_prefix(Sec.sh_size, 6)); 3835 Fields[6].Str = to_string(format_hex_no_prefix(Sec.sh_entsize, 2)); 3836 Fields[7].Str = getGNUFlags(Obj->getHeader()->e_machine, Sec.sh_flags); 3837 Fields[8].Str = to_string(Sec.sh_link); 3838 Fields[9].Str = to_string(Sec.sh_info); 3839 Fields[10].Str = to_string(Sec.sh_addralign); 3840 3841 OS.PadToColumn(Fields[0].Column); 3842 OS << "[" << right_justify(Fields[0].Str, 2) << "]"; 3843 for (int i = 1; i < 7; i++) 3844 printField(Fields[i]); 3845 OS.PadToColumn(Fields[7].Column); 3846 OS << right_justify(Fields[7].Str, 3); 3847 OS.PadToColumn(Fields[8].Column); 3848 OS << right_justify(Fields[8].Str, 2); 3849 OS.PadToColumn(Fields[9].Column); 3850 OS << right_justify(Fields[9].Str, 3); 3851 OS.PadToColumn(Fields[10].Column); 3852 OS << right_justify(Fields[10].Str, 2); 3853 OS << "\n"; 3854 ++SectionIndex; 3855 } 3856 printSectionDescription(OS, Obj->getHeader()->e_machine); 3857 } 3858 3859 template <class ELFT> 3860 void GNUStyle<ELFT>::printSymtabMessage(const ELFO *Obj, StringRef Name, 3861 size_t Entries, 3862 bool NonVisibilityBitsUsed) { 3863 if (!Name.empty()) 3864 OS << "\nSymbol table '" << Name << "'"; 3865 else 3866 OS << "\nSymbol table for image"; 3867 OS << " contains " << Entries << " entries:\n"; 3868 3869 if (ELFT::Is64Bits) 3870 OS << " Num: Value Size Type Bind Vis"; 3871 else 3872 OS << " Num: Value Size Type Bind Vis"; 3873 3874 if (NonVisibilityBitsUsed) 3875 OS << " "; 3876 OS << " Ndx Name\n"; 3877 } 3878 3879 template <class ELFT> 3880 std::string GNUStyle<ELFT>::getSymbolSectionNdx(const ELFO *Obj, 3881 const Elf_Sym *Symbol, 3882 const Elf_Sym *FirstSym) { 3883 unsigned SectionIndex = Symbol->st_shndx; 3884 switch (SectionIndex) { 3885 case ELF::SHN_UNDEF: 3886 return "UND"; 3887 case ELF::SHN_ABS: 3888 return "ABS"; 3889 case ELF::SHN_COMMON: 3890 return "COM"; 3891 case ELF::SHN_XINDEX: { 3892 Expected<uint32_t> IndexOrErr = object::getExtendedSymbolTableIndex<ELFT>( 3893 Symbol, FirstSym, this->dumper()->getShndxTable()); 3894 if (!IndexOrErr) { 3895 assert(Symbol->st_shndx == SHN_XINDEX && 3896 "getSymbolSectionIndex should only fail due to an invalid " 3897 "SHT_SYMTAB_SHNDX table/reference"); 3898 this->reportUniqueWarning(IndexOrErr.takeError()); 3899 return "RSV[0xffff]"; 3900 } 3901 return to_string(format_decimal(*IndexOrErr, 3)); 3902 } 3903 default: 3904 // Find if: 3905 // Processor specific 3906 if (SectionIndex >= ELF::SHN_LOPROC && SectionIndex <= ELF::SHN_HIPROC) 3907 return std::string("PRC[0x") + 3908 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3909 // OS specific 3910 if (SectionIndex >= ELF::SHN_LOOS && SectionIndex <= ELF::SHN_HIOS) 3911 return std::string("OS[0x") + 3912 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3913 // Architecture reserved: 3914 if (SectionIndex >= ELF::SHN_LORESERVE && 3915 SectionIndex <= ELF::SHN_HIRESERVE) 3916 return std::string("RSV[0x") + 3917 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3918 // A normal section with an index 3919 return to_string(format_decimal(SectionIndex, 3)); 3920 } 3921 } 3922 3923 template <class ELFT> 3924 void GNUStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 3925 const Elf_Sym *FirstSym, StringRef StrTable, 3926 bool IsDynamic, bool NonVisibilityBitsUsed) { 3927 static int Idx = 0; 3928 static bool Dynamic = true; 3929 3930 // If this function was called with a different value from IsDynamic 3931 // from last call, happens when we move from dynamic to static symbol 3932 // table, "Num" field should be reset. 3933 if (!Dynamic != !IsDynamic) { 3934 Idx = 0; 3935 Dynamic = false; 3936 } 3937 3938 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3939 Field Fields[8] = {0, 8, 17 + Bias, 23 + Bias, 3940 31 + Bias, 38 + Bias, 48 + Bias, 51 + Bias}; 3941 Fields[0].Str = to_string(format_decimal(Idx++, 6)) + ":"; 3942 Fields[1].Str = to_string( 3943 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3944 Fields[2].Str = to_string(format_decimal(Symbol->st_size, 5)); 3945 3946 unsigned char SymbolType = Symbol->getType(); 3947 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3948 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3949 Fields[3].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3950 else 3951 Fields[3].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3952 3953 Fields[4].Str = 3954 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3955 Fields[5].Str = 3956 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3957 if (Symbol->st_other & ~0x3) 3958 Fields[5].Str += 3959 " [<other: " + to_string(format_hex(Symbol->st_other, 2)) + ">]"; 3960 3961 Fields[6].Column += NonVisibilityBitsUsed ? 13 : 0; 3962 Fields[6].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 3963 3964 Fields[7].Str = 3965 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 3966 for (auto &Entry : Fields) 3967 printField(Entry); 3968 OS << "\n"; 3969 } 3970 3971 template <class ELFT> 3972 void GNUStyle<ELFT>::printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, 3973 uint32_t Sym, StringRef StrTable, 3974 uint32_t Bucket) { 3975 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3976 Field Fields[9] = {0, 6, 11, 20 + Bias, 25 + Bias, 3977 34 + Bias, 41 + Bias, 49 + Bias, 53 + Bias}; 3978 Fields[0].Str = to_string(format_decimal(Sym, 5)); 3979 Fields[1].Str = to_string(format_decimal(Bucket, 3)) + ":"; 3980 3981 const auto Symbol = FirstSym + Sym; 3982 Fields[2].Str = to_string( 3983 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3984 Fields[3].Str = to_string(format_decimal(Symbol->st_size, 5)); 3985 3986 unsigned char SymbolType = Symbol->getType(); 3987 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3988 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3989 Fields[4].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3990 else 3991 Fields[4].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3992 3993 Fields[5].Str = 3994 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3995 Fields[6].Str = 3996 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3997 Fields[7].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 3998 Fields[8].Str = this->dumper()->getFullSymbolName(Symbol, StrTable, true); 3999 4000 for (auto &Entry : Fields) 4001 printField(Entry); 4002 OS << "\n"; 4003 } 4004 4005 template <class ELFT> 4006 void GNUStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 4007 bool PrintDynamicSymbols) { 4008 if (!PrintSymbols && !PrintDynamicSymbols) 4009 return; 4010 // GNU readelf prints both the .dynsym and .symtab with --symbols. 4011 this->dumper()->printSymbolsHelper(true); 4012 if (PrintSymbols) 4013 this->dumper()->printSymbolsHelper(false); 4014 } 4015 4016 template <class ELFT> void GNUStyle<ELFT>::printHashSymbols(const ELFO *Obj) { 4017 if (this->dumper()->getDynamicStringTable().empty()) 4018 return; 4019 auto StringTable = this->dumper()->getDynamicStringTable(); 4020 auto DynSyms = this->dumper()->dynamic_symbols(); 4021 4022 auto PrintHashTable = [&](const Elf_Hash *SysVHash) { 4023 if (ELFT::Is64Bits) 4024 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4025 else 4026 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4027 OS << "\n"; 4028 4029 auto Buckets = SysVHash->buckets(); 4030 auto Chains = SysVHash->chains(); 4031 for (uint32_t Buc = 0; Buc < SysVHash->nbucket; Buc++) { 4032 if (Buckets[Buc] == ELF::STN_UNDEF) 4033 continue; 4034 std::vector<bool> Visited(SysVHash->nchain); 4035 for (uint32_t Ch = Buckets[Buc]; Ch < SysVHash->nchain; Ch = Chains[Ch]) { 4036 if (Ch == ELF::STN_UNDEF) 4037 break; 4038 4039 if (Visited[Ch]) { 4040 reportWarning( 4041 createError(".hash section is invalid: bucket " + Twine(Ch) + 4042 ": a cycle was detected in the linked chain"), 4043 this->FileName); 4044 break; 4045 } 4046 4047 printHashedSymbol(Obj, &DynSyms[0], Ch, StringTable, Buc); 4048 Visited[Ch] = true; 4049 } 4050 } 4051 }; 4052 4053 if (const Elf_Hash *SysVHash = this->dumper()->getHashTable()) { 4054 OS << "\n Symbol table of .hash for image:\n"; 4055 if (Error E = checkHashTable<ELFT>(Obj, SysVHash)) 4056 this->reportUniqueWarning(std::move(E)); 4057 else 4058 PrintHashTable(SysVHash); 4059 } 4060 4061 // Try printing .gnu.hash 4062 if (auto GnuHash = this->dumper()->getGnuHashTable()) { 4063 OS << "\n Symbol table of .gnu.hash for image:\n"; 4064 if (ELFT::Is64Bits) 4065 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4066 else 4067 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 4068 OS << "\n"; 4069 auto Buckets = GnuHash->buckets(); 4070 for (uint32_t Buc = 0; Buc < GnuHash->nbuckets; Buc++) { 4071 if (Buckets[Buc] == ELF::STN_UNDEF) 4072 continue; 4073 uint32_t Index = Buckets[Buc]; 4074 uint32_t GnuHashable = Index - GnuHash->symndx; 4075 // Print whole chain 4076 while (true) { 4077 printHashedSymbol(Obj, &DynSyms[0], Index++, StringTable, Buc); 4078 // Chain ends at symbol with stopper bit 4079 if ((GnuHash->values(DynSyms.size())[GnuHashable++] & 1) == 1) 4080 break; 4081 } 4082 } 4083 } 4084 } 4085 4086 static inline std::string printPhdrFlags(unsigned Flag) { 4087 std::string Str; 4088 Str = (Flag & PF_R) ? "R" : " "; 4089 Str += (Flag & PF_W) ? "W" : " "; 4090 Str += (Flag & PF_X) ? "E" : " "; 4091 return Str; 4092 } 4093 4094 template <class ELFT> 4095 static bool checkTLSSections(const typename ELFT::Phdr &Phdr, 4096 const typename ELFT::Shdr &Sec) { 4097 if (Sec.sh_flags & ELF::SHF_TLS) { 4098 // .tbss must only be shown in the PT_TLS segment. 4099 if (Sec.sh_type == ELF::SHT_NOBITS) 4100 return Phdr.p_type == ELF::PT_TLS; 4101 4102 // SHF_TLS sections are only shown in PT_TLS, PT_LOAD or PT_GNU_RELRO 4103 // segments. 4104 return (Phdr.p_type == ELF::PT_TLS) || (Phdr.p_type == ELF::PT_LOAD) || 4105 (Phdr.p_type == ELF::PT_GNU_RELRO); 4106 } 4107 4108 // PT_TLS must only have SHF_TLS sections. 4109 return Phdr.p_type != ELF::PT_TLS; 4110 } 4111 4112 template <class ELFT> 4113 static bool checkOffsets(const typename ELFT::Phdr &Phdr, 4114 const typename ELFT::Shdr &Sec) { 4115 // SHT_NOBITS sections don't need to have an offset inside the segment. 4116 if (Sec.sh_type == ELF::SHT_NOBITS) 4117 return true; 4118 4119 if (Sec.sh_offset < Phdr.p_offset) 4120 return false; 4121 4122 // Only non-empty sections can be at the end of a segment. 4123 if (Sec.sh_size == 0) 4124 return (Sec.sh_offset + 1 <= Phdr.p_offset + Phdr.p_filesz); 4125 return Sec.sh_offset + Sec.sh_size <= Phdr.p_offset + Phdr.p_filesz; 4126 } 4127 4128 // Check that an allocatable section belongs to a virtual address 4129 // space of a segment. 4130 template <class ELFT> 4131 static bool checkVMA(const typename ELFT::Phdr &Phdr, 4132 const typename ELFT::Shdr &Sec) { 4133 if (!(Sec.sh_flags & ELF::SHF_ALLOC)) 4134 return true; 4135 4136 if (Sec.sh_addr < Phdr.p_vaddr) 4137 return false; 4138 4139 bool IsTbss = 4140 (Sec.sh_type == ELF::SHT_NOBITS) && ((Sec.sh_flags & ELF::SHF_TLS) != 0); 4141 // .tbss is special, it only has memory in PT_TLS and has NOBITS properties. 4142 bool IsTbssInNonTLS = IsTbss && Phdr.p_type != ELF::PT_TLS; 4143 // Only non-empty sections can be at the end of a segment. 4144 if (Sec.sh_size == 0 || IsTbssInNonTLS) 4145 return Sec.sh_addr + 1 <= Phdr.p_vaddr + Phdr.p_memsz; 4146 return Sec.sh_addr + Sec.sh_size <= Phdr.p_vaddr + Phdr.p_memsz; 4147 } 4148 4149 template <class ELFT> 4150 static bool checkPTDynamic(const typename ELFT::Phdr &Phdr, 4151 const typename ELFT::Shdr &Sec) { 4152 if (Phdr.p_type != ELF::PT_DYNAMIC || Phdr.p_memsz == 0 || Sec.sh_size != 0) 4153 return true; 4154 4155 // We get here when we have an empty section. Only non-empty sections can be 4156 // at the start or at the end of PT_DYNAMIC. 4157 // Is section within the phdr both based on offset and VMA? 4158 bool CheckOffset = (Sec.sh_type == ELF::SHT_NOBITS) || 4159 (Sec.sh_offset > Phdr.p_offset && 4160 Sec.sh_offset < Phdr.p_offset + Phdr.p_filesz); 4161 bool CheckVA = !(Sec.sh_flags & ELF::SHF_ALLOC) || 4162 (Sec.sh_addr > Phdr.p_vaddr && Sec.sh_addr < Phdr.p_memsz); 4163 return CheckOffset && CheckVA; 4164 } 4165 4166 template <class ELFT> 4167 void GNUStyle<ELFT>::printProgramHeaders( 4168 const ELFO *Obj, bool PrintProgramHeaders, 4169 cl::boolOrDefault PrintSectionMapping) { 4170 if (PrintProgramHeaders) 4171 printProgramHeaders(Obj); 4172 4173 // Display the section mapping along with the program headers, unless 4174 // -section-mapping is explicitly set to false. 4175 if (PrintSectionMapping != cl::BOU_FALSE) 4176 printSectionMapping(Obj); 4177 } 4178 4179 template <class ELFT> 4180 void GNUStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 4181 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 4182 const Elf_Ehdr *Header = Obj->getHeader(); 4183 Field Fields[8] = {2, 17, 26, 37 + Bias, 4184 48 + Bias, 56 + Bias, 64 + Bias, 68 + Bias}; 4185 OS << "\nElf file type is " 4186 << printEnum(Header->e_type, makeArrayRef(ElfObjectFileType)) << "\n" 4187 << "Entry point " << format_hex(Header->e_entry, 3) << "\n" 4188 << "There are " << Header->e_phnum << " program headers," 4189 << " starting at offset " << Header->e_phoff << "\n\n" 4190 << "Program Headers:\n"; 4191 if (ELFT::Is64Bits) 4192 OS << " Type Offset VirtAddr PhysAddr " 4193 << " FileSiz MemSiz Flg Align\n"; 4194 else 4195 OS << " Type Offset VirtAddr PhysAddr FileSiz " 4196 << "MemSiz Flg Align\n"; 4197 4198 unsigned Width = ELFT::Is64Bits ? 18 : 10; 4199 unsigned SizeWidth = ELFT::Is64Bits ? 8 : 7; 4200 for (const auto &Phdr : 4201 unwrapOrError(this->FileName, Obj->program_headers())) { 4202 Fields[0].Str = getElfPtType(Header->e_machine, Phdr.p_type); 4203 Fields[1].Str = to_string(format_hex(Phdr.p_offset, 8)); 4204 Fields[2].Str = to_string(format_hex(Phdr.p_vaddr, Width)); 4205 Fields[3].Str = to_string(format_hex(Phdr.p_paddr, Width)); 4206 Fields[4].Str = to_string(format_hex(Phdr.p_filesz, SizeWidth)); 4207 Fields[5].Str = to_string(format_hex(Phdr.p_memsz, SizeWidth)); 4208 Fields[6].Str = printPhdrFlags(Phdr.p_flags); 4209 Fields[7].Str = to_string(format_hex(Phdr.p_align, 1)); 4210 for (auto Field : Fields) 4211 printField(Field); 4212 if (Phdr.p_type == ELF::PT_INTERP) { 4213 OS << "\n"; 4214 auto ReportBadInterp = [&](const Twine &Msg) { 4215 reportWarning( 4216 createError("unable to read program interpreter name at offset 0x" + 4217 Twine::utohexstr(Phdr.p_offset) + ": " + Msg), 4218 this->FileName); 4219 }; 4220 4221 if (Phdr.p_offset >= Obj->getBufSize()) { 4222 ReportBadInterp("it goes past the end of the file (0x" + 4223 Twine::utohexstr(Obj->getBufSize()) + ")"); 4224 continue; 4225 } 4226 4227 const char *Data = 4228 reinterpret_cast<const char *>(Obj->base()) + Phdr.p_offset; 4229 size_t MaxSize = Obj->getBufSize() - Phdr.p_offset; 4230 size_t Len = strnlen(Data, MaxSize); 4231 if (Len == MaxSize) { 4232 ReportBadInterp("it is not null-terminated"); 4233 continue; 4234 } 4235 4236 OS << " [Requesting program interpreter: "; 4237 OS << StringRef(Data, Len) << "]"; 4238 } 4239 OS << "\n"; 4240 } 4241 } 4242 4243 template <class ELFT> 4244 void GNUStyle<ELFT>::printSectionMapping(const ELFO *Obj) { 4245 OS << "\n Section to Segment mapping:\n Segment Sections...\n"; 4246 DenseSet<const Elf_Shdr *> BelongsToSegment; 4247 int Phnum = 0; 4248 for (const Elf_Phdr &Phdr : 4249 unwrapOrError(this->FileName, Obj->program_headers())) { 4250 std::string Sections; 4251 OS << format(" %2.2d ", Phnum++); 4252 // Check if each section is in a segment and then print mapping. 4253 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4254 if (Sec.sh_type == ELF::SHT_NULL) 4255 continue; 4256 4257 // readelf additionally makes sure it does not print zero sized sections 4258 // at end of segments and for PT_DYNAMIC both start and end of section 4259 // .tbss must only be shown in PT_TLS section. 4260 if (checkTLSSections<ELFT>(Phdr, Sec) && checkOffsets<ELFT>(Phdr, Sec) && 4261 checkVMA<ELFT>(Phdr, Sec) && checkPTDynamic<ELFT>(Phdr, Sec)) { 4262 Sections += 4263 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + 4264 " "; 4265 BelongsToSegment.insert(&Sec); 4266 } 4267 } 4268 OS << Sections << "\n"; 4269 OS.flush(); 4270 } 4271 4272 // Display sections that do not belong to a segment. 4273 std::string Sections; 4274 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4275 if (BelongsToSegment.find(&Sec) == BelongsToSegment.end()) 4276 Sections += 4277 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + ' '; 4278 } 4279 if (!Sections.empty()) { 4280 OS << " None " << Sections << '\n'; 4281 OS.flush(); 4282 } 4283 } 4284 4285 namespace { 4286 template <class ELFT> struct RelSymbol { 4287 const typename ELFT::Sym *Sym; 4288 std::string Name; 4289 }; 4290 4291 template <class ELFT> 4292 RelSymbol<ELFT> getSymbolForReloc(const ELFFile<ELFT> *Obj, StringRef FileName, 4293 const ELFDumper<ELFT> *Dumper, 4294 const typename ELFT::Rela &Reloc) { 4295 uint32_t SymIndex = Reloc.getSymbol(Obj->isMips64EL()); 4296 auto WarnAndReturn = [&](const typename ELFT::Sym *Sym, 4297 const Twine &Reason) -> RelSymbol<ELFT> { 4298 reportWarning( 4299 createError("unable to get name of the dynamic symbol with index " + 4300 Twine(SymIndex) + ": " + Reason), 4301 FileName); 4302 return {Sym, "<corrupt>"}; 4303 }; 4304 4305 ArrayRef<typename ELFT::Sym> Symbols = Dumper->dynamic_symbols(); 4306 const typename ELFT::Sym *FirstSym = Symbols.begin(); 4307 if (!FirstSym) 4308 return WarnAndReturn(nullptr, "no dynamic symbol table found"); 4309 4310 // We might have an object without a section header. In this case the size of 4311 // Symbols is zero, because there is no way to know the size of the dynamic 4312 // table. We should allow this case and not print a warning. 4313 if (!Symbols.empty() && SymIndex >= Symbols.size()) 4314 return WarnAndReturn( 4315 nullptr, 4316 "index is greater than or equal to the number of dynamic symbols (" + 4317 Twine(Symbols.size()) + ")"); 4318 4319 const typename ELFT::Sym *Sym = FirstSym + SymIndex; 4320 Expected<StringRef> ErrOrName = Sym->getName(Dumper->getDynamicStringTable()); 4321 if (!ErrOrName) 4322 return WarnAndReturn(Sym, toString(ErrOrName.takeError())); 4323 4324 return {Sym == FirstSym ? nullptr : Sym, maybeDemangle(*ErrOrName)}; 4325 } 4326 } // namespace 4327 4328 template <class ELFT> 4329 void GNUStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela R, 4330 bool IsRela) { 4331 RelSymbol<ELFT> S = getSymbolForReloc(Obj, this->FileName, this->dumper(), R); 4332 printRelocation(Obj, S.Sym, S.Name, R, IsRela); 4333 } 4334 4335 template <class ELFT> 4336 static size_t getMaxDynamicTagSize(const ELFFile<ELFT> *Obj, 4337 typename ELFT::DynRange Tags) { 4338 size_t Max = 0; 4339 for (const typename ELFT::Dyn &Dyn : Tags) 4340 Max = std::max(Max, Obj->getDynamicTagAsString(Dyn.d_tag).size()); 4341 return Max; 4342 } 4343 4344 template <class ELFT> void GNUStyle<ELFT>::printDynamic(const ELFO *Obj) { 4345 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 4346 if (Table.empty()) 4347 return; 4348 4349 const DynRegionInfo &DynamicTableRegion = 4350 this->dumper()->getDynamicTableRegion(); 4351 4352 OS << "Dynamic section at offset " 4353 << format_hex(reinterpret_cast<const uint8_t *>(DynamicTableRegion.Addr) - 4354 Obj->base(), 4355 1) 4356 << " contains " << Table.size() << " entries:\n"; 4357 4358 // The type name is surrounded with round brackets, hence add 2. 4359 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table) + 2; 4360 // The "Name/Value" column should be indented from the "Type" column by N 4361 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 4362 // space (1) = 3. 4363 OS << " Tag" + std::string(ELFT::Is64Bits ? 16 : 8, ' ') + "Type" 4364 << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 4365 4366 std::string ValueFmt = " %-" + std::to_string(MaxTagSize) + "s "; 4367 for (auto Entry : Table) { 4368 uintX_t Tag = Entry.getTag(); 4369 std::string Type = 4370 std::string("(") + Obj->getDynamicTagAsString(Tag).c_str() + ")"; 4371 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 4372 OS << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10) 4373 << format(ValueFmt.c_str(), Type.c_str()) << Value << "\n"; 4374 } 4375 } 4376 4377 template <class ELFT> 4378 void GNUStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 4379 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 4380 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 4381 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 4382 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 4383 if (DynRelaRegion.Size > 0) { 4384 OS << "\n'RELA' relocation section at offset " 4385 << format_hex(reinterpret_cast<const uint8_t *>(DynRelaRegion.Addr) - 4386 Obj->base(), 4387 1) 4388 << " contains " << DynRelaRegion.Size << " bytes:\n"; 4389 printRelocHeader(ELF::SHT_RELA); 4390 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 4391 printDynamicRelocation(Obj, Rela, true); 4392 } 4393 if (DynRelRegion.Size > 0) { 4394 OS << "\n'REL' relocation section at offset " 4395 << format_hex(reinterpret_cast<const uint8_t *>(DynRelRegion.Addr) - 4396 Obj->base(), 4397 1) 4398 << " contains " << DynRelRegion.Size << " bytes:\n"; 4399 printRelocHeader(ELF::SHT_REL); 4400 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 4401 Elf_Rela Rela; 4402 Rela.r_offset = Rel.r_offset; 4403 Rela.r_info = Rel.r_info; 4404 Rela.r_addend = 0; 4405 printDynamicRelocation(Obj, Rela, false); 4406 } 4407 } 4408 if (DynRelrRegion.Size > 0) { 4409 OS << "\n'RELR' relocation section at offset " 4410 << format_hex(reinterpret_cast<const uint8_t *>(DynRelrRegion.Addr) - 4411 Obj->base(), 4412 1) 4413 << " contains " << DynRelrRegion.Size << " bytes:\n"; 4414 printRelocHeader(ELF::SHT_REL); 4415 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 4416 std::vector<Elf_Rela> RelrRelas = 4417 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 4418 for (const Elf_Rela &Rela : RelrRelas) { 4419 printDynamicRelocation(Obj, Rela, false); 4420 } 4421 } 4422 if (DynPLTRelRegion.Size) { 4423 OS << "\n'PLT' relocation section at offset " 4424 << format_hex(reinterpret_cast<const uint8_t *>(DynPLTRelRegion.Addr) - 4425 Obj->base(), 4426 1) 4427 << " contains " << DynPLTRelRegion.Size << " bytes:\n"; 4428 } 4429 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) { 4430 printRelocHeader(ELF::SHT_RELA); 4431 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 4432 printDynamicRelocation(Obj, Rela, true); 4433 } else { 4434 printRelocHeader(ELF::SHT_REL); 4435 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 4436 Elf_Rela Rela; 4437 Rela.r_offset = Rel.r_offset; 4438 Rela.r_info = Rel.r_info; 4439 Rela.r_addend = 0; 4440 printDynamicRelocation(Obj, Rela, false); 4441 } 4442 } 4443 } 4444 4445 template <class ELFT> 4446 void GNUStyle<ELFT>::printGNUVersionSectionProlog( 4447 const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec, 4448 const Twine &Label, unsigned EntriesNum) { 4449 StringRef SecName = unwrapOrError(this->FileName, Obj->getSectionName(Sec)); 4450 OS << Label << " section '" << SecName << "' " 4451 << "contains " << EntriesNum << " entries:\n"; 4452 4453 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4454 StringRef SymTabName = "<corrupt>"; 4455 4456 Expected<const typename ELFT::Shdr *> SymTabOrErr = 4457 Obj->getSection(Sec->sh_link); 4458 if (SymTabOrErr) 4459 SymTabName = 4460 unwrapOrError(this->FileName, Obj->getSectionName(*SymTabOrErr)); 4461 else 4462 this->reportUniqueWarning( 4463 createError("invalid section linked to " + 4464 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 4465 Sec->sh_type) + 4466 " section with index " + Twine(SecNdx) + ": " + 4467 toString(SymTabOrErr.takeError()))); 4468 4469 OS << " Addr: " << format_hex_no_prefix(Sec->sh_addr, 16) 4470 << " Offset: " << format_hex(Sec->sh_offset, 8) 4471 << " Link: " << Sec->sh_link << " (" << SymTabName << ")\n"; 4472 } 4473 4474 template <class ELFT> 4475 void GNUStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 4476 const Elf_Shdr *Sec) { 4477 if (!Sec) 4478 return; 4479 4480 printGNUVersionSectionProlog(Obj, Sec, "Version symbols", 4481 Sec->sh_size / sizeof(Elf_Versym)); 4482 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 4483 this->dumper()->getVersionTable(Sec, /*SymTab=*/nullptr, 4484 /*StrTab=*/nullptr); 4485 if (!VerTableOrErr) { 4486 this->reportUniqueWarning(VerTableOrErr.takeError()); 4487 return; 4488 } 4489 4490 ArrayRef<Elf_Versym> VerTable = *VerTableOrErr; 4491 std::vector<StringRef> Versions; 4492 for (size_t I = 0, E = VerTable.size(); I < E; ++I) { 4493 unsigned Ndx = VerTable[I].vs_index; 4494 if (Ndx == VER_NDX_LOCAL || Ndx == VER_NDX_GLOBAL) { 4495 Versions.emplace_back(Ndx == VER_NDX_LOCAL ? "*local*" : "*global*"); 4496 continue; 4497 } 4498 4499 bool IsDefault; 4500 Expected<StringRef> NameOrErr = 4501 this->dumper()->getSymbolVersionByIndex(Ndx, IsDefault); 4502 if (!NameOrErr) { 4503 if (!NameOrErr) { 4504 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4505 this->reportUniqueWarning(createError( 4506 "unable to get a version for entry " + Twine(I) + 4507 " of SHT_GNU_versym section with index " + Twine(SecNdx) + ": " + 4508 toString(NameOrErr.takeError()))); 4509 } 4510 Versions.emplace_back("<corrupt>"); 4511 continue; 4512 } 4513 Versions.emplace_back(*NameOrErr); 4514 } 4515 4516 // readelf prints 4 entries per line. 4517 uint64_t Entries = VerTable.size(); 4518 for (uint64_t VersymRow = 0; VersymRow < Entries; VersymRow += 4) { 4519 OS << " " << format_hex_no_prefix(VersymRow, 3) << ":"; 4520 for (uint64_t I = 0; (I < 4) && (I + VersymRow) < Entries; ++I) { 4521 unsigned Ndx = VerTable[VersymRow + I].vs_index; 4522 OS << format("%4x%c", Ndx & VERSYM_VERSION, 4523 Ndx & VERSYM_HIDDEN ? 'h' : ' '); 4524 OS << left_justify("(" + std::string(Versions[VersymRow + I]) + ")", 13); 4525 } 4526 OS << '\n'; 4527 } 4528 OS << '\n'; 4529 } 4530 4531 static std::string versionFlagToString(unsigned Flags) { 4532 if (Flags == 0) 4533 return "none"; 4534 4535 std::string Ret; 4536 auto AddFlag = [&Ret, &Flags](unsigned Flag, StringRef Name) { 4537 if (!(Flags & Flag)) 4538 return; 4539 if (!Ret.empty()) 4540 Ret += " | "; 4541 Ret += Name; 4542 Flags &= ~Flag; 4543 }; 4544 4545 AddFlag(VER_FLG_BASE, "BASE"); 4546 AddFlag(VER_FLG_WEAK, "WEAK"); 4547 AddFlag(VER_FLG_INFO, "INFO"); 4548 AddFlag(~0, "<unknown>"); 4549 return Ret; 4550 } 4551 4552 template <class ELFT> 4553 void GNUStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 4554 const Elf_Shdr *Sec) { 4555 if (!Sec) 4556 return; 4557 4558 printGNUVersionSectionProlog(Obj, Sec, "Version definition", Sec->sh_info); 4559 4560 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 4561 if (!V) { 4562 this->reportUniqueWarning(V.takeError()); 4563 return; 4564 } 4565 4566 for (const VerDef &Def : *V) { 4567 OS << format(" 0x%04x: Rev: %u Flags: %s Index: %u Cnt: %u Name: %s\n", 4568 Def.Offset, Def.Version, 4569 versionFlagToString(Def.Flags).c_str(), Def.Ndx, Def.Cnt, 4570 Def.Name.data()); 4571 unsigned I = 0; 4572 for (const VerdAux &Aux : Def.AuxV) 4573 OS << format(" 0x%04x: Parent %u: %s\n", Aux.Offset, ++I, 4574 Aux.Name.data()); 4575 } 4576 4577 OS << '\n'; 4578 } 4579 4580 template <class ELFT> 4581 void GNUStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 4582 const Elf_Shdr *Sec) { 4583 if (!Sec) 4584 return; 4585 4586 unsigned VerneedNum = Sec->sh_info; 4587 printGNUVersionSectionProlog(Obj, Sec, "Version needs", VerneedNum); 4588 4589 Expected<std::vector<VerNeed>> V = 4590 this->dumper()->getVersionDependencies(Sec); 4591 if (!V) { 4592 this->reportUniqueWarning(V.takeError()); 4593 return; 4594 } 4595 4596 for (const VerNeed &VN : *V) { 4597 OS << format(" 0x%04x: Version: %u File: %s Cnt: %u\n", VN.Offset, 4598 VN.Version, VN.File.data(), VN.Cnt); 4599 for (const VernAux &Aux : VN.AuxV) 4600 OS << format(" 0x%04x: Name: %s Flags: %s Version: %u\n", Aux.Offset, 4601 Aux.Name.data(), versionFlagToString(Aux.Flags).c_str(), 4602 Aux.Other); 4603 } 4604 OS << '\n'; 4605 } 4606 4607 template <class ELFT> 4608 void GNUStyle<ELFT>::printHashHistogram(const Elf_Hash &HashTable) { 4609 size_t NBucket = HashTable.nbucket; 4610 size_t NChain = HashTable.nchain; 4611 ArrayRef<Elf_Word> Buckets = HashTable.buckets(); 4612 ArrayRef<Elf_Word> Chains = HashTable.chains(); 4613 size_t TotalSyms = 0; 4614 // If hash table is correct, we have at least chains with 0 length 4615 size_t MaxChain = 1; 4616 size_t CumulativeNonZero = 0; 4617 4618 if (NChain == 0 || NBucket == 0) 4619 return; 4620 4621 std::vector<size_t> ChainLen(NBucket, 0); 4622 // Go over all buckets and and note chain lengths of each bucket (total 4623 // unique chain lengths). 4624 for (size_t B = 0; B < NBucket; B++) { 4625 std::vector<bool> Visited(NChain); 4626 for (size_t C = Buckets[B]; C < NChain; C = Chains[C]) { 4627 if (C == ELF::STN_UNDEF) 4628 break; 4629 if (Visited[C]) { 4630 reportWarning(createError(".hash section is invalid: bucket " + 4631 Twine(C) + 4632 ": a cycle was detected in the linked chain"), 4633 this->FileName); 4634 break; 4635 } 4636 Visited[C] = true; 4637 if (MaxChain <= ++ChainLen[B]) 4638 MaxChain++; 4639 } 4640 TotalSyms += ChainLen[B]; 4641 } 4642 4643 if (!TotalSyms) 4644 return; 4645 4646 std::vector<size_t> Count(MaxChain, 0); 4647 // Count how long is the chain for each bucket 4648 for (size_t B = 0; B < NBucket; B++) 4649 ++Count[ChainLen[B]]; 4650 // Print Number of buckets with each chain lengths and their cumulative 4651 // coverage of the symbols 4652 OS << "Histogram for bucket list length (total of " << NBucket 4653 << " buckets)\n" 4654 << " Length Number % of total Coverage\n"; 4655 for (size_t I = 0; I < MaxChain; I++) { 4656 CumulativeNonZero += Count[I] * I; 4657 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4658 (Count[I] * 100.0) / NBucket, 4659 (CumulativeNonZero * 100.0) / TotalSyms); 4660 } 4661 } 4662 4663 template <class ELFT> 4664 void GNUStyle<ELFT>::printGnuHashHistogram(const Elf_GnuHash &GnuHashTable) { 4665 Expected<ArrayRef<Elf_Word>> ChainsOrErr = getGnuHashTableChains<ELFT>( 4666 this->dumper()->getDynSymRegion(), &GnuHashTable); 4667 if (!ChainsOrErr) { 4668 this->reportUniqueWarning( 4669 createError("unable to print the GNU hash table histogram: " + 4670 toString(ChainsOrErr.takeError()))); 4671 return; 4672 } 4673 4674 ArrayRef<Elf_Word> Chains = *ChainsOrErr; 4675 size_t Symndx = GnuHashTable.symndx; 4676 size_t TotalSyms = 0; 4677 size_t MaxChain = 1; 4678 size_t CumulativeNonZero = 0; 4679 4680 size_t NBucket = GnuHashTable.nbuckets; 4681 if (Chains.empty() || NBucket == 0) 4682 return; 4683 4684 ArrayRef<Elf_Word> Buckets = GnuHashTable.buckets(); 4685 std::vector<size_t> ChainLen(NBucket, 0); 4686 for (size_t B = 0; B < NBucket; B++) { 4687 if (!Buckets[B]) 4688 continue; 4689 size_t Len = 1; 4690 for (size_t C = Buckets[B] - Symndx; 4691 C < Chains.size() && (Chains[C] & 1) == 0; C++) 4692 if (MaxChain < ++Len) 4693 MaxChain++; 4694 ChainLen[B] = Len; 4695 TotalSyms += Len; 4696 } 4697 MaxChain++; 4698 4699 if (!TotalSyms) 4700 return; 4701 4702 std::vector<size_t> Count(MaxChain, 0); 4703 for (size_t B = 0; B < NBucket; B++) 4704 ++Count[ChainLen[B]]; 4705 // Print Number of buckets with each chain lengths and their cumulative 4706 // coverage of the symbols 4707 OS << "Histogram for `.gnu.hash' bucket list length (total of " << NBucket 4708 << " buckets)\n" 4709 << " Length Number % of total Coverage\n"; 4710 for (size_t I = 0; I < MaxChain; I++) { 4711 CumulativeNonZero += Count[I] * I; 4712 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4713 (Count[I] * 100.0) / NBucket, 4714 (CumulativeNonZero * 100.0) / TotalSyms); 4715 } 4716 } 4717 4718 // Hash histogram shows statistics of how efficient the hash was for the 4719 // dynamic symbol table. The table shows the number of hash buckets for 4720 // different lengths of chains as an absolute number and percentage of the total 4721 // buckets, and the cumulative coverage of symbols for each set of buckets. 4722 template <class ELFT> 4723 void GNUStyle<ELFT>::printHashHistograms(const ELFFile<ELFT> *Obj) { 4724 // Print histogram for the .hash section. 4725 if (const Elf_Hash *HashTable = this->dumper()->getHashTable()) { 4726 if (Error E = checkHashTable<ELFT>(Obj, HashTable)) 4727 this->reportUniqueWarning(std::move(E)); 4728 else 4729 printHashHistogram(*HashTable); 4730 } 4731 4732 // Print histogram for the .gnu.hash section. 4733 if (const Elf_GnuHash *GnuHashTable = this->dumper()->getGnuHashTable()) { 4734 if (Error E = checkGNUHashTable<ELFT>(Obj, GnuHashTable)) 4735 this->reportUniqueWarning(std::move(E)); 4736 else 4737 printGnuHashHistogram(*GnuHashTable); 4738 } 4739 } 4740 4741 template <class ELFT> 4742 void GNUStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 4743 OS << "GNUStyle::printCGProfile not implemented\n"; 4744 } 4745 4746 template <class ELFT> 4747 void GNUStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 4748 reportError(createError("--addrsig: not implemented"), this->FileName); 4749 } 4750 4751 static StringRef getGenericNoteTypeName(const uint32_t NT) { 4752 static const struct { 4753 uint32_t ID; 4754 const char *Name; 4755 } Notes[] = { 4756 {ELF::NT_VERSION, "NT_VERSION (version)"}, 4757 {ELF::NT_ARCH, "NT_ARCH (architecture)"}, 4758 {ELF::NT_GNU_BUILD_ATTRIBUTE_OPEN, "OPEN"}, 4759 {ELF::NT_GNU_BUILD_ATTRIBUTE_FUNC, "func"}, 4760 }; 4761 4762 for (const auto &Note : Notes) 4763 if (Note.ID == NT) 4764 return Note.Name; 4765 4766 return ""; 4767 } 4768 4769 static StringRef getCoreNoteTypeName(const uint32_t NT) { 4770 static const struct { 4771 uint32_t ID; 4772 const char *Name; 4773 } Notes[] = { 4774 {ELF::NT_PRSTATUS, "NT_PRSTATUS (prstatus structure)"}, 4775 {ELF::NT_FPREGSET, "NT_FPREGSET (floating point registers)"}, 4776 {ELF::NT_PRPSINFO, "NT_PRPSINFO (prpsinfo structure)"}, 4777 {ELF::NT_TASKSTRUCT, "NT_TASKSTRUCT (task structure)"}, 4778 {ELF::NT_AUXV, "NT_AUXV (auxiliary vector)"}, 4779 {ELF::NT_PSTATUS, "NT_PSTATUS (pstatus structure)"}, 4780 {ELF::NT_FPREGS, "NT_FPREGS (floating point registers)"}, 4781 {ELF::NT_PSINFO, "NT_PSINFO (psinfo structure)"}, 4782 {ELF::NT_LWPSTATUS, "NT_LWPSTATUS (lwpstatus_t structure)"}, 4783 {ELF::NT_LWPSINFO, "NT_LWPSINFO (lwpsinfo_t structure)"}, 4784 {ELF::NT_WIN32PSTATUS, "NT_WIN32PSTATUS (win32_pstatus structure)"}, 4785 4786 {ELF::NT_PPC_VMX, "NT_PPC_VMX (ppc Altivec registers)"}, 4787 {ELF::NT_PPC_VSX, "NT_PPC_VSX (ppc VSX registers)"}, 4788 {ELF::NT_PPC_TAR, "NT_PPC_TAR (ppc TAR register)"}, 4789 {ELF::NT_PPC_PPR, "NT_PPC_PPR (ppc PPR register)"}, 4790 {ELF::NT_PPC_DSCR, "NT_PPC_DSCR (ppc DSCR register)"}, 4791 {ELF::NT_PPC_EBB, "NT_PPC_EBB (ppc EBB registers)"}, 4792 {ELF::NT_PPC_PMU, "NT_PPC_PMU (ppc PMU registers)"}, 4793 {ELF::NT_PPC_TM_CGPR, "NT_PPC_TM_CGPR (ppc checkpointed GPR registers)"}, 4794 {ELF::NT_PPC_TM_CFPR, 4795 "NT_PPC_TM_CFPR (ppc checkpointed floating point registers)"}, 4796 {ELF::NT_PPC_TM_CVMX, 4797 "NT_PPC_TM_CVMX (ppc checkpointed Altivec registers)"}, 4798 {ELF::NT_PPC_TM_CVSX, "NT_PPC_TM_CVSX (ppc checkpointed VSX registers)"}, 4799 {ELF::NT_PPC_TM_SPR, "NT_PPC_TM_SPR (ppc TM special purpose registers)"}, 4800 {ELF::NT_PPC_TM_CTAR, "NT_PPC_TM_CTAR (ppc checkpointed TAR register)"}, 4801 {ELF::NT_PPC_TM_CPPR, "NT_PPC_TM_CPPR (ppc checkpointed PPR register)"}, 4802 {ELF::NT_PPC_TM_CDSCR, 4803 "NT_PPC_TM_CDSCR (ppc checkpointed DSCR register)"}, 4804 4805 {ELF::NT_386_TLS, "NT_386_TLS (x86 TLS information)"}, 4806 {ELF::NT_386_IOPERM, "NT_386_IOPERM (x86 I/O permissions)"}, 4807 {ELF::NT_X86_XSTATE, "NT_X86_XSTATE (x86 XSAVE extended state)"}, 4808 4809 {ELF::NT_S390_HIGH_GPRS, 4810 "NT_S390_HIGH_GPRS (s390 upper register halves)"}, 4811 {ELF::NT_S390_TIMER, "NT_S390_TIMER (s390 timer register)"}, 4812 {ELF::NT_S390_TODCMP, "NT_S390_TODCMP (s390 TOD comparator register)"}, 4813 {ELF::NT_S390_TODPREG, 4814 "NT_S390_TODPREG (s390 TOD programmable register)"}, 4815 {ELF::NT_S390_CTRS, "NT_S390_CTRS (s390 control registers)"}, 4816 {ELF::NT_S390_PREFIX, "NT_S390_PREFIX (s390 prefix register)"}, 4817 {ELF::NT_S390_LAST_BREAK, 4818 "NT_S390_LAST_BREAK (s390 last breaking event address)"}, 4819 {ELF::NT_S390_SYSTEM_CALL, 4820 "NT_S390_SYSTEM_CALL (s390 system call restart data)"}, 4821 {ELF::NT_S390_TDB, "NT_S390_TDB (s390 transaction diagnostic block)"}, 4822 {ELF::NT_S390_VXRS_LOW, 4823 "NT_S390_VXRS_LOW (s390 vector registers 0-15 upper half)"}, 4824 {ELF::NT_S390_VXRS_HIGH, 4825 "NT_S390_VXRS_HIGH (s390 vector registers 16-31)"}, 4826 {ELF::NT_S390_GS_CB, "NT_S390_GS_CB (s390 guarded-storage registers)"}, 4827 {ELF::NT_S390_GS_BC, 4828 "NT_S390_GS_BC (s390 guarded-storage broadcast control)"}, 4829 4830 {ELF::NT_ARM_VFP, "NT_ARM_VFP (arm VFP registers)"}, 4831 {ELF::NT_ARM_TLS, "NT_ARM_TLS (AArch TLS registers)"}, 4832 {ELF::NT_ARM_HW_BREAK, 4833 "NT_ARM_HW_BREAK (AArch hardware breakpoint registers)"}, 4834 {ELF::NT_ARM_HW_WATCH, 4835 "NT_ARM_HW_WATCH (AArch hardware watchpoint registers)"}, 4836 4837 {ELF::NT_FILE, "NT_FILE (mapped files)"}, 4838 {ELF::NT_PRXFPREG, "NT_PRXFPREG (user_xfpregs structure)"}, 4839 {ELF::NT_SIGINFO, "NT_SIGINFO (siginfo_t data)"}, 4840 }; 4841 4842 for (const auto &Note : Notes) 4843 if (Note.ID == NT) 4844 return Note.Name; 4845 4846 return ""; 4847 } 4848 4849 static std::string getGNUNoteTypeName(const uint32_t NT) { 4850 static const struct { 4851 uint32_t ID; 4852 const char *Name; 4853 } Notes[] = { 4854 {ELF::NT_GNU_ABI_TAG, "NT_GNU_ABI_TAG (ABI version tag)"}, 4855 {ELF::NT_GNU_HWCAP, "NT_GNU_HWCAP (DSO-supplied software HWCAP info)"}, 4856 {ELF::NT_GNU_BUILD_ID, "NT_GNU_BUILD_ID (unique build ID bitstring)"}, 4857 {ELF::NT_GNU_GOLD_VERSION, "NT_GNU_GOLD_VERSION (gold version)"}, 4858 {ELF::NT_GNU_PROPERTY_TYPE_0, "NT_GNU_PROPERTY_TYPE_0 (property note)"}, 4859 }; 4860 4861 for (const auto &Note : Notes) 4862 if (Note.ID == NT) 4863 return std::string(Note.Name); 4864 4865 std::string string; 4866 raw_string_ostream OS(string); 4867 OS << format("Unknown note type (0x%08x)", NT); 4868 return OS.str(); 4869 } 4870 4871 static std::string getFreeBSDNoteTypeName(const uint32_t NT) { 4872 static const struct { 4873 uint32_t ID; 4874 const char *Name; 4875 } Notes[] = { 4876 {ELF::NT_FREEBSD_THRMISC, "NT_THRMISC (thrmisc structure)"}, 4877 {ELF::NT_FREEBSD_PROCSTAT_PROC, "NT_PROCSTAT_PROC (proc data)"}, 4878 {ELF::NT_FREEBSD_PROCSTAT_FILES, "NT_PROCSTAT_FILES (files data)"}, 4879 {ELF::NT_FREEBSD_PROCSTAT_VMMAP, "NT_PROCSTAT_VMMAP (vmmap data)"}, 4880 {ELF::NT_FREEBSD_PROCSTAT_GROUPS, "NT_PROCSTAT_GROUPS (groups data)"}, 4881 {ELF::NT_FREEBSD_PROCSTAT_UMASK, "NT_PROCSTAT_UMASK (umask data)"}, 4882 {ELF::NT_FREEBSD_PROCSTAT_RLIMIT, "NT_PROCSTAT_RLIMIT (rlimit data)"}, 4883 {ELF::NT_FREEBSD_PROCSTAT_OSREL, "NT_PROCSTAT_OSREL (osreldate data)"}, 4884 {ELF::NT_FREEBSD_PROCSTAT_PSSTRINGS, 4885 "NT_PROCSTAT_PSSTRINGS (ps_strings data)"}, 4886 {ELF::NT_FREEBSD_PROCSTAT_AUXV, "NT_PROCSTAT_AUXV (auxv data)"}, 4887 }; 4888 4889 for (const auto &Note : Notes) 4890 if (Note.ID == NT) 4891 return std::string(Note.Name); 4892 4893 std::string string; 4894 raw_string_ostream OS(string); 4895 OS << format("Unknown note type (0x%08x)", NT); 4896 return OS.str(); 4897 } 4898 4899 static std::string getAMDNoteTypeName(const uint32_t NT) { 4900 static const struct { 4901 uint32_t ID; 4902 const char *Name; 4903 } Notes[] = {{ELF::NT_AMD_AMDGPU_HSA_METADATA, 4904 "NT_AMD_AMDGPU_HSA_METADATA (HSA Metadata)"}, 4905 {ELF::NT_AMD_AMDGPU_ISA, "NT_AMD_AMDGPU_ISA (ISA Version)"}, 4906 {ELF::NT_AMD_AMDGPU_PAL_METADATA, 4907 "NT_AMD_AMDGPU_PAL_METADATA (PAL Metadata)"}}; 4908 4909 for (const auto &Note : Notes) 4910 if (Note.ID == NT) 4911 return std::string(Note.Name); 4912 4913 std::string string; 4914 raw_string_ostream OS(string); 4915 OS << format("Unknown note type (0x%08x)", NT); 4916 return OS.str(); 4917 } 4918 4919 static std::string getAMDGPUNoteTypeName(const uint32_t NT) { 4920 if (NT == ELF::NT_AMDGPU_METADATA) 4921 return std::string("NT_AMDGPU_METADATA (AMDGPU Metadata)"); 4922 4923 std::string string; 4924 raw_string_ostream OS(string); 4925 OS << format("Unknown note type (0x%08x)", NT); 4926 return OS.str(); 4927 } 4928 4929 template <typename ELFT> 4930 static std::string getGNUProperty(uint32_t Type, uint32_t DataSize, 4931 ArrayRef<uint8_t> Data) { 4932 std::string str; 4933 raw_string_ostream OS(str); 4934 uint32_t PrData; 4935 auto DumpBit = [&](uint32_t Flag, StringRef Name) { 4936 if (PrData & Flag) { 4937 PrData &= ~Flag; 4938 OS << Name; 4939 if (PrData) 4940 OS << ", "; 4941 } 4942 }; 4943 4944 switch (Type) { 4945 default: 4946 OS << format("<application-specific type 0x%x>", Type); 4947 return OS.str(); 4948 case GNU_PROPERTY_STACK_SIZE: { 4949 OS << "stack size: "; 4950 if (DataSize == sizeof(typename ELFT::uint)) 4951 OS << formatv("{0:x}", 4952 (uint64_t)(*(const typename ELFT::Addr *)Data.data())); 4953 else 4954 OS << format("<corrupt length: 0x%x>", DataSize); 4955 return OS.str(); 4956 } 4957 case GNU_PROPERTY_NO_COPY_ON_PROTECTED: 4958 OS << "no copy on protected"; 4959 if (DataSize) 4960 OS << format(" <corrupt length: 0x%x>", DataSize); 4961 return OS.str(); 4962 case GNU_PROPERTY_AARCH64_FEATURE_1_AND: 4963 case GNU_PROPERTY_X86_FEATURE_1_AND: 4964 OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: " 4965 : "x86 feature: "); 4966 if (DataSize != 4) { 4967 OS << format("<corrupt length: 0x%x>", DataSize); 4968 return OS.str(); 4969 } 4970 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4971 if (PrData == 0) { 4972 OS << "<None>"; 4973 return OS.str(); 4974 } 4975 if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) { 4976 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI"); 4977 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC"); 4978 } else { 4979 DumpBit(GNU_PROPERTY_X86_FEATURE_1_IBT, "IBT"); 4980 DumpBit(GNU_PROPERTY_X86_FEATURE_1_SHSTK, "SHSTK"); 4981 } 4982 if (PrData) 4983 OS << format("<unknown flags: 0x%x>", PrData); 4984 return OS.str(); 4985 case GNU_PROPERTY_X86_ISA_1_NEEDED: 4986 case GNU_PROPERTY_X86_ISA_1_USED: 4987 OS << "x86 ISA " 4988 << (Type == GNU_PROPERTY_X86_ISA_1_NEEDED ? "needed: " : "used: "); 4989 if (DataSize != 4) { 4990 OS << format("<corrupt length: 0x%x>", DataSize); 4991 return OS.str(); 4992 } 4993 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4994 if (PrData == 0) { 4995 OS << "<None>"; 4996 return OS.str(); 4997 } 4998 DumpBit(GNU_PROPERTY_X86_ISA_1_CMOV, "CMOV"); 4999 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE, "SSE"); 5000 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE2, "SSE2"); 5001 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE3, "SSE3"); 5002 DumpBit(GNU_PROPERTY_X86_ISA_1_SSSE3, "SSSE3"); 5003 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_1, "SSE4_1"); 5004 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_2, "SSE4_2"); 5005 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX, "AVX"); 5006 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX2, "AVX2"); 5007 DumpBit(GNU_PROPERTY_X86_ISA_1_FMA, "FMA"); 5008 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512F, "AVX512F"); 5009 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512CD, "AVX512CD"); 5010 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512ER, "AVX512ER"); 5011 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512PF, "AVX512PF"); 5012 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512VL, "AVX512VL"); 5013 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512DQ, "AVX512DQ"); 5014 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512BW, "AVX512BW"); 5015 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4FMAPS, "AVX512_4FMAPS"); 5016 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4VNNIW, "AVX512_4VNNIW"); 5017 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_BITALG, "AVX512_BITALG"); 5018 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_IFMA, "AVX512_IFMA"); 5019 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI, "AVX512_VBMI"); 5020 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI2, "AVX512_VBMI2"); 5021 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VNNI, "AVX512_VNNI"); 5022 if (PrData) 5023 OS << format("<unknown flags: 0x%x>", PrData); 5024 return OS.str(); 5025 break; 5026 case GNU_PROPERTY_X86_FEATURE_2_NEEDED: 5027 case GNU_PROPERTY_X86_FEATURE_2_USED: 5028 OS << "x86 feature " 5029 << (Type == GNU_PROPERTY_X86_FEATURE_2_NEEDED ? "needed: " : "used: "); 5030 if (DataSize != 4) { 5031 OS << format("<corrupt length: 0x%x>", DataSize); 5032 return OS.str(); 5033 } 5034 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 5035 if (PrData == 0) { 5036 OS << "<None>"; 5037 return OS.str(); 5038 } 5039 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X86, "x86"); 5040 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X87, "x87"); 5041 DumpBit(GNU_PROPERTY_X86_FEATURE_2_MMX, "MMX"); 5042 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XMM, "XMM"); 5043 DumpBit(GNU_PROPERTY_X86_FEATURE_2_YMM, "YMM"); 5044 DumpBit(GNU_PROPERTY_X86_FEATURE_2_ZMM, "ZMM"); 5045 DumpBit(GNU_PROPERTY_X86_FEATURE_2_FXSR, "FXSR"); 5046 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVE, "XSAVE"); 5047 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT, "XSAVEOPT"); 5048 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEC, "XSAVEC"); 5049 if (PrData) 5050 OS << format("<unknown flags: 0x%x>", PrData); 5051 return OS.str(); 5052 } 5053 } 5054 5055 template <typename ELFT> 5056 static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) { 5057 using Elf_Word = typename ELFT::Word; 5058 5059 SmallVector<std::string, 4> Properties; 5060 while (Arr.size() >= 8) { 5061 uint32_t Type = *reinterpret_cast<const Elf_Word *>(Arr.data()); 5062 uint32_t DataSize = *reinterpret_cast<const Elf_Word *>(Arr.data() + 4); 5063 Arr = Arr.drop_front(8); 5064 5065 // Take padding size into account if present. 5066 uint64_t PaddedSize = alignTo(DataSize, sizeof(typename ELFT::uint)); 5067 std::string str; 5068 raw_string_ostream OS(str); 5069 if (Arr.size() < PaddedSize) { 5070 OS << format("<corrupt type (0x%x) datasz: 0x%x>", Type, DataSize); 5071 Properties.push_back(OS.str()); 5072 break; 5073 } 5074 Properties.push_back( 5075 getGNUProperty<ELFT>(Type, DataSize, Arr.take_front(PaddedSize))); 5076 Arr = Arr.drop_front(PaddedSize); 5077 } 5078 5079 if (!Arr.empty()) 5080 Properties.push_back("<corrupted GNU_PROPERTY_TYPE_0>"); 5081 5082 return Properties; 5083 } 5084 5085 struct GNUAbiTag { 5086 std::string OSName; 5087 std::string ABI; 5088 bool IsValid; 5089 }; 5090 5091 template <typename ELFT> static GNUAbiTag getGNUAbiTag(ArrayRef<uint8_t> Desc) { 5092 typedef typename ELFT::Word Elf_Word; 5093 5094 ArrayRef<Elf_Word> Words(reinterpret_cast<const Elf_Word *>(Desc.begin()), 5095 reinterpret_cast<const Elf_Word *>(Desc.end())); 5096 5097 if (Words.size() < 4) 5098 return {"", "", /*IsValid=*/false}; 5099 5100 static const char *OSNames[] = { 5101 "Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable", "NaCl", 5102 }; 5103 StringRef OSName = "Unknown"; 5104 if (Words[0] < array_lengthof(OSNames)) 5105 OSName = OSNames[Words[0]]; 5106 uint32_t Major = Words[1], Minor = Words[2], Patch = Words[3]; 5107 std::string str; 5108 raw_string_ostream ABI(str); 5109 ABI << Major << "." << Minor << "." << Patch; 5110 return {std::string(OSName), ABI.str(), /*IsValid=*/true}; 5111 } 5112 5113 static std::string getGNUBuildId(ArrayRef<uint8_t> Desc) { 5114 std::string str; 5115 raw_string_ostream OS(str); 5116 for (const auto &B : Desc) 5117 OS << format_hex_no_prefix(B, 2); 5118 return OS.str(); 5119 } 5120 5121 static StringRef getGNUGoldVersion(ArrayRef<uint8_t> Desc) { 5122 return StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5123 } 5124 5125 template <typename ELFT> 5126 static void printGNUNote(raw_ostream &OS, uint32_t NoteType, 5127 ArrayRef<uint8_t> Desc) { 5128 switch (NoteType) { 5129 default: 5130 return; 5131 case ELF::NT_GNU_ABI_TAG: { 5132 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 5133 if (!AbiTag.IsValid) 5134 OS << " <corrupt GNU_ABI_TAG>"; 5135 else 5136 OS << " OS: " << AbiTag.OSName << ", ABI: " << AbiTag.ABI; 5137 break; 5138 } 5139 case ELF::NT_GNU_BUILD_ID: { 5140 OS << " Build ID: " << getGNUBuildId(Desc); 5141 break; 5142 } 5143 case ELF::NT_GNU_GOLD_VERSION: 5144 OS << " Version: " << getGNUGoldVersion(Desc); 5145 break; 5146 case ELF::NT_GNU_PROPERTY_TYPE_0: 5147 OS << " Properties:"; 5148 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 5149 OS << " " << Property << "\n"; 5150 break; 5151 } 5152 OS << '\n'; 5153 } 5154 5155 struct AMDNote { 5156 std::string Type; 5157 std::string Value; 5158 }; 5159 5160 template <typename ELFT> 5161 static AMDNote getAMDNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5162 switch (NoteType) { 5163 default: 5164 return {"", ""}; 5165 case ELF::NT_AMD_AMDGPU_HSA_METADATA: 5166 return { 5167 "HSA Metadata", 5168 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5169 case ELF::NT_AMD_AMDGPU_ISA: 5170 return { 5171 "ISA Version", 5172 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5173 } 5174 } 5175 5176 struct AMDGPUNote { 5177 std::string Type; 5178 std::string Value; 5179 }; 5180 5181 template <typename ELFT> 5182 static AMDGPUNote getAMDGPUNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5183 switch (NoteType) { 5184 default: 5185 return {"", ""}; 5186 case ELF::NT_AMDGPU_METADATA: { 5187 auto MsgPackString = 5188 StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5189 msgpack::Document MsgPackDoc; 5190 if (!MsgPackDoc.readFromBlob(MsgPackString, /*Multi=*/false)) 5191 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5192 5193 AMDGPU::HSAMD::V3::MetadataVerifier Verifier(true); 5194 if (!Verifier.verify(MsgPackDoc.getRoot())) 5195 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5196 5197 std::string HSAMetadataString; 5198 raw_string_ostream StrOS(HSAMetadataString); 5199 MsgPackDoc.toYAML(StrOS); 5200 5201 return {"AMDGPU Metadata", StrOS.str()}; 5202 } 5203 } 5204 } 5205 5206 struct CoreFileMapping { 5207 uint64_t Start, End, Offset; 5208 StringRef Filename; 5209 }; 5210 5211 struct CoreNote { 5212 uint64_t PageSize; 5213 std::vector<CoreFileMapping> Mappings; 5214 }; 5215 5216 static Expected<CoreNote> readCoreNote(DataExtractor Desc) { 5217 // Expected format of the NT_FILE note description: 5218 // 1. # of file mappings (call it N) 5219 // 2. Page size 5220 // 3. N (start, end, offset) triples 5221 // 4. N packed filenames (null delimited) 5222 // Each field is an Elf_Addr, except for filenames which are char* strings. 5223 5224 CoreNote Ret; 5225 const int Bytes = Desc.getAddressSize(); 5226 5227 if (!Desc.isValidOffsetForAddress(2)) 5228 return createStringError(object_error::parse_failed, 5229 "malformed note: header too short"); 5230 if (Desc.getData().back() != 0) 5231 return createStringError(object_error::parse_failed, 5232 "malformed note: not NUL terminated"); 5233 5234 uint64_t DescOffset = 0; 5235 uint64_t FileCount = Desc.getAddress(&DescOffset); 5236 Ret.PageSize = Desc.getAddress(&DescOffset); 5237 5238 if (!Desc.isValidOffsetForAddress(3 * FileCount * Bytes)) 5239 return createStringError(object_error::parse_failed, 5240 "malformed note: too short for number of files"); 5241 5242 uint64_t FilenamesOffset = 0; 5243 DataExtractor Filenames( 5244 Desc.getData().drop_front(DescOffset + 3 * FileCount * Bytes), 5245 Desc.isLittleEndian(), Desc.getAddressSize()); 5246 5247 Ret.Mappings.resize(FileCount); 5248 for (CoreFileMapping &Mapping : Ret.Mappings) { 5249 if (!Filenames.isValidOffsetForDataOfSize(FilenamesOffset, 1)) 5250 return createStringError(object_error::parse_failed, 5251 "malformed note: too few filenames"); 5252 Mapping.Start = Desc.getAddress(&DescOffset); 5253 Mapping.End = Desc.getAddress(&DescOffset); 5254 Mapping.Offset = Desc.getAddress(&DescOffset); 5255 Mapping.Filename = Filenames.getCStrRef(&FilenamesOffset); 5256 } 5257 5258 return Ret; 5259 } 5260 5261 template <typename ELFT> 5262 static void printCoreNote(raw_ostream &OS, const CoreNote &Note) { 5263 // Length of "0x<address>" string. 5264 const int FieldWidth = ELFT::Is64Bits ? 18 : 10; 5265 5266 OS << " Page size: " << format_decimal(Note.PageSize, 0) << '\n'; 5267 OS << " " << right_justify("Start", FieldWidth) << " " 5268 << right_justify("End", FieldWidth) << " " 5269 << right_justify("Page Offset", FieldWidth) << '\n'; 5270 for (const CoreFileMapping &Mapping : Note.Mappings) { 5271 OS << " " << format_hex(Mapping.Start, FieldWidth) << " " 5272 << format_hex(Mapping.End, FieldWidth) << " " 5273 << format_hex(Mapping.Offset, FieldWidth) << "\n " 5274 << Mapping.Filename << '\n'; 5275 } 5276 } 5277 5278 template <class ELFT> 5279 void GNUStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 5280 auto PrintHeader = [&](Optional<StringRef> SecName, 5281 const typename ELFT::Off Offset, 5282 const typename ELFT::Addr Size) { 5283 OS << "Displaying notes found "; 5284 5285 if (SecName) 5286 OS << "in: " << *SecName << "\n"; 5287 else 5288 OS << "at file offset " << format_hex(Offset, 10) << " with length " 5289 << format_hex(Size, 10) << ":\n"; 5290 5291 OS << " Owner Data size \tDescription\n"; 5292 }; 5293 5294 auto ProcessNote = [&](const Elf_Note &Note) { 5295 StringRef Name = Note.getName(); 5296 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 5297 Elf_Word Type = Note.getType(); 5298 5299 // Print the note owner/type. 5300 OS << " " << left_justify(Name, 20) << ' ' 5301 << format_hex(Descriptor.size(), 10) << '\t'; 5302 if (Name == "GNU") { 5303 OS << getGNUNoteTypeName(Type) << '\n'; 5304 } else if (Name == "FreeBSD") { 5305 OS << getFreeBSDNoteTypeName(Type) << '\n'; 5306 } else if (Name == "AMD") { 5307 OS << getAMDNoteTypeName(Type) << '\n'; 5308 } else if (Name == "AMDGPU") { 5309 OS << getAMDGPUNoteTypeName(Type) << '\n'; 5310 } else { 5311 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 5312 ? getCoreNoteTypeName(Type) 5313 : getGenericNoteTypeName(Type); 5314 if (!NoteType.empty()) 5315 OS << NoteType << '\n'; 5316 else 5317 OS << "Unknown note type: (" << format_hex(Type, 10) << ")\n"; 5318 } 5319 5320 // Print the description, or fallback to printing raw bytes for unknown 5321 // owners. 5322 if (Name == "GNU") { 5323 printGNUNote<ELFT>(OS, Type, Descriptor); 5324 } else if (Name == "AMD") { 5325 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 5326 if (!N.Type.empty()) 5327 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5328 } else if (Name == "AMDGPU") { 5329 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 5330 if (!N.Type.empty()) 5331 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5332 } else if (Name == "CORE") { 5333 if (Type == ELF::NT_FILE) { 5334 DataExtractor DescExtractor(Descriptor, 5335 ELFT::TargetEndianness == support::little, 5336 sizeof(Elf_Addr)); 5337 Expected<CoreNote> Note = readCoreNote(DescExtractor); 5338 if (Note) 5339 printCoreNote<ELFT>(OS, *Note); 5340 else 5341 reportWarning(Note.takeError(), this->FileName); 5342 } 5343 } else if (!Descriptor.empty()) { 5344 OS << " description data:"; 5345 for (uint8_t B : Descriptor) 5346 OS << " " << format("%02x", B); 5347 OS << '\n'; 5348 } 5349 }; 5350 5351 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 5352 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 5353 for (const auto &S : Sections) { 5354 if (S.sh_type != SHT_NOTE) 5355 continue; 5356 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 5357 S.sh_size); 5358 Error Err = Error::success(); 5359 for (auto Note : Obj->notes(S, Err)) 5360 ProcessNote(Note); 5361 if (Err) 5362 reportError(std::move(Err), this->FileName); 5363 } 5364 } else { 5365 for (const auto &P : 5366 unwrapOrError(this->FileName, Obj->program_headers())) { 5367 if (P.p_type != PT_NOTE) 5368 continue; 5369 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 5370 Error Err = Error::success(); 5371 for (auto Note : Obj->notes(P, Err)) 5372 ProcessNote(Note); 5373 if (Err) 5374 reportError(std::move(Err), this->FileName); 5375 } 5376 } 5377 } 5378 5379 template <class ELFT> 5380 void GNUStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 5381 OS << "printELFLinkerOptions not implemented!\n"; 5382 } 5383 5384 template <class ELFT> 5385 void DumpStyle<ELFT>::printDependentLibsHelper( 5386 const ELFFile<ELFT> *Obj, 5387 function_ref<void(const Elf_Shdr &)> OnSectionStart, 5388 function_ref<void(StringRef, uint64_t)> OnLibEntry) { 5389 auto Warn = [this](unsigned SecNdx, StringRef Msg) { 5390 this->reportUniqueWarning( 5391 createError("SHT_LLVM_DEPENDENT_LIBRARIES section at index " + 5392 Twine(SecNdx) + " is broken: " + Msg)); 5393 }; 5394 5395 unsigned I = -1; 5396 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 5397 ++I; 5398 if (Shdr.sh_type != ELF::SHT_LLVM_DEPENDENT_LIBRARIES) 5399 continue; 5400 5401 OnSectionStart(Shdr); 5402 5403 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(&Shdr); 5404 if (!ContentsOrErr) { 5405 Warn(I, toString(ContentsOrErr.takeError())); 5406 continue; 5407 } 5408 5409 ArrayRef<uint8_t> Contents = *ContentsOrErr; 5410 if (!Contents.empty() && Contents.back() != 0) { 5411 Warn(I, "the content is not null-terminated"); 5412 continue; 5413 } 5414 5415 for (const uint8_t *I = Contents.begin(), *E = Contents.end(); I < E;) { 5416 StringRef Lib((const char *)I); 5417 OnLibEntry(Lib, I - Contents.begin()); 5418 I += Lib.size() + 1; 5419 } 5420 } 5421 } 5422 5423 template <class ELFT> 5424 void GNUStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 5425 bool SectionStarted = false; 5426 struct NameOffset { 5427 StringRef Name; 5428 uint64_t Offset; 5429 }; 5430 std::vector<NameOffset> SecEntries; 5431 NameOffset Current; 5432 auto PrintSection = [&]() { 5433 OS << "Dependent libraries section " << Current.Name << " at offset " 5434 << format_hex(Current.Offset, 1) << " contains " << SecEntries.size() 5435 << " entries:\n"; 5436 for (NameOffset Entry : SecEntries) 5437 OS << " [" << format("%6tx", Entry.Offset) << "] " << Entry.Name 5438 << "\n"; 5439 OS << "\n"; 5440 SecEntries.clear(); 5441 }; 5442 5443 auto OnSectionStart = [&](const Elf_Shdr &Shdr) { 5444 if (SectionStarted) 5445 PrintSection(); 5446 SectionStarted = true; 5447 Current.Offset = Shdr.sh_offset; 5448 Expected<StringRef> Name = Obj->getSectionName(&Shdr); 5449 if (!Name) { 5450 Current.Name = "<?>"; 5451 this->reportUniqueWarning( 5452 createError("cannot get section name of " 5453 "SHT_LLVM_DEPENDENT_LIBRARIES section: " + 5454 toString(Name.takeError()))); 5455 } else { 5456 Current.Name = *Name; 5457 } 5458 }; 5459 auto OnLibEntry = [&](StringRef Lib, uint64_t Offset) { 5460 SecEntries.push_back(NameOffset{Lib, Offset}); 5461 }; 5462 5463 this->printDependentLibsHelper(Obj, OnSectionStart, OnLibEntry); 5464 if (SectionStarted) 5465 PrintSection(); 5466 } 5467 5468 // Used for printing section names in places where possible errors can be 5469 // ignored. 5470 static StringRef getSectionName(const SectionRef &Sec) { 5471 Expected<StringRef> NameOrErr = Sec.getName(); 5472 if (NameOrErr) 5473 return *NameOrErr; 5474 consumeError(NameOrErr.takeError()); 5475 return "<?>"; 5476 } 5477 5478 // Used for printing symbol names in places where possible errors can be 5479 // ignored. 5480 static std::string getSymbolName(const ELFSymbolRef &Sym) { 5481 Expected<StringRef> NameOrErr = Sym.getName(); 5482 if (NameOrErr) 5483 return maybeDemangle(*NameOrErr); 5484 consumeError(NameOrErr.takeError()); 5485 return "<?>"; 5486 } 5487 5488 template <class ELFT> 5489 void DumpStyle<ELFT>::printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, 5490 uint64_t SymValue, 5491 Optional<SectionRef> FunctionSec, 5492 const StringRef SectionName, 5493 DataExtractor Data, 5494 uint64_t *Offset) { 5495 // This function ignores potentially erroneous input, unless it is directly 5496 // related to stack size reporting. 5497 SymbolRef FuncSym; 5498 for (const ELFSymbolRef &Symbol : Obj->symbols()) { 5499 Expected<uint64_t> SymAddrOrErr = Symbol.getAddress(); 5500 if (!SymAddrOrErr) { 5501 consumeError(SymAddrOrErr.takeError()); 5502 continue; 5503 } 5504 if (Expected<uint32_t> SymFlags = Symbol.getFlags()) { 5505 if (*SymFlags & SymbolRef::SF_Undefined) 5506 continue; 5507 } else 5508 consumeError(SymFlags.takeError()); 5509 if (Symbol.getELFType() == ELF::STT_FUNC && *SymAddrOrErr == SymValue) { 5510 // Check if the symbol is in the right section. FunctionSec == None means 5511 // "any section". 5512 if (!FunctionSec || FunctionSec->containsSymbol(Symbol)) { 5513 FuncSym = Symbol; 5514 break; 5515 } 5516 } 5517 } 5518 5519 std::string FuncName = "?"; 5520 // A valid SymbolRef has a non-null object file pointer. 5521 if (FuncSym.BasicSymbolRef::getObject()) 5522 FuncName = getSymbolName(FuncSym); 5523 else 5524 reportWarning( 5525 createError("could not identify function symbol for stack size entry"), 5526 Obj->getFileName()); 5527 5528 // Extract the size. The expectation is that Offset is pointing to the right 5529 // place, i.e. past the function address. 5530 uint64_t PrevOffset = *Offset; 5531 uint64_t StackSize = Data.getULEB128(Offset); 5532 // getULEB128() does not advance Offset if it is not able to extract a valid 5533 // integer. 5534 if (*Offset == PrevOffset) 5535 reportError( 5536 createStringError(object_error::parse_failed, 5537 "could not extract a valid stack size in section %s", 5538 SectionName.data()), 5539 Obj->getFileName()); 5540 5541 printStackSizeEntry(StackSize, FuncName); 5542 } 5543 5544 template <class ELFT> 5545 void GNUStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 5546 OS.PadToColumn(2); 5547 OS << format_decimal(Size, 11); 5548 OS.PadToColumn(18); 5549 OS << FuncName << "\n"; 5550 } 5551 5552 template <class ELFT> 5553 void DumpStyle<ELFT>::printStackSize(const ELFObjectFile<ELFT> *Obj, 5554 RelocationRef Reloc, 5555 SectionRef FunctionSec, 5556 const StringRef &StackSizeSectionName, 5557 const RelocationResolver &Resolver, 5558 DataExtractor Data) { 5559 // This function ignores potentially erroneous input, unless it is directly 5560 // related to stack size reporting. 5561 object::symbol_iterator RelocSym = Reloc.getSymbol(); 5562 uint64_t RelocSymValue = 0; 5563 StringRef FileStr = Obj->getFileName(); 5564 if (RelocSym != Obj->symbol_end()) { 5565 // Ensure that the relocation symbol is in the function section, i.e. the 5566 // section where the functions whose stack sizes we are reporting are 5567 // located. 5568 auto SectionOrErr = RelocSym->getSection(); 5569 if (!SectionOrErr) { 5570 reportWarning( 5571 createError("cannot identify the section for relocation symbol '" + 5572 getSymbolName(*RelocSym) + "'"), 5573 FileStr); 5574 consumeError(SectionOrErr.takeError()); 5575 } else if (*SectionOrErr != FunctionSec) { 5576 reportWarning(createError("relocation symbol '" + 5577 getSymbolName(*RelocSym) + 5578 "' is not in the expected section"), 5579 FileStr); 5580 // Pretend that the symbol is in the correct section and report its 5581 // stack size anyway. 5582 FunctionSec = **SectionOrErr; 5583 } 5584 5585 Expected<uint64_t> RelocSymValueOrErr = RelocSym->getValue(); 5586 if (RelocSymValueOrErr) 5587 RelocSymValue = *RelocSymValueOrErr; 5588 else 5589 consumeError(RelocSymValueOrErr.takeError()); 5590 } 5591 5592 uint64_t Offset = Reloc.getOffset(); 5593 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) 5594 reportError( 5595 createStringError(object_error::parse_failed, 5596 "found invalid relocation offset into section %s " 5597 "while trying to extract a stack size entry", 5598 StackSizeSectionName.data()), 5599 FileStr); 5600 5601 uint64_t Addend = Data.getAddress(&Offset); 5602 uint64_t SymValue = Resolver(Reloc, RelocSymValue, Addend); 5603 this->printFunctionStackSize(Obj, SymValue, FunctionSec, StackSizeSectionName, 5604 Data, &Offset); 5605 } 5606 5607 template <class ELFT> 5608 void DumpStyle<ELFT>::printNonRelocatableStackSizes( 5609 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5610 // This function ignores potentially erroneous input, unless it is directly 5611 // related to stack size reporting. 5612 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5613 StringRef FileStr = Obj->getFileName(); 5614 for (const SectionRef &Sec : Obj->sections()) { 5615 StringRef SectionName = getSectionName(Sec); 5616 if (SectionName != ".stack_sizes") 5617 continue; 5618 PrintHeader(); 5619 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5620 ArrayRef<uint8_t> Contents = 5621 unwrapOrError(this->FileName, EF->getSectionContents(ElfSec)); 5622 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5623 uint64_t Offset = 0; 5624 while (Offset < Contents.size()) { 5625 // The function address is followed by a ULEB representing the stack 5626 // size. Check for an extra byte before we try to process the entry. 5627 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) { 5628 reportError( 5629 createStringError( 5630 object_error::parse_failed, 5631 "section %s ended while trying to extract a stack size entry", 5632 SectionName.data()), 5633 FileStr); 5634 } 5635 uint64_t SymValue = Data.getAddress(&Offset); 5636 printFunctionStackSize(Obj, SymValue, /*FunctionSec=*/None, SectionName, 5637 Data, &Offset); 5638 } 5639 } 5640 } 5641 5642 template <class ELFT> 5643 void DumpStyle<ELFT>::printRelocatableStackSizes( 5644 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5645 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5646 5647 // Build a map between stack size sections and their corresponding relocation 5648 // sections. 5649 llvm::MapVector<SectionRef, SectionRef> StackSizeRelocMap; 5650 const SectionRef NullSection{}; 5651 5652 for (const SectionRef &Sec : Obj->sections()) { 5653 StringRef SectionName; 5654 if (Expected<StringRef> NameOrErr = Sec.getName()) 5655 SectionName = *NameOrErr; 5656 else 5657 consumeError(NameOrErr.takeError()); 5658 5659 // A stack size section that we haven't encountered yet is mapped to the 5660 // null section until we find its corresponding relocation section. 5661 if (SectionName == ".stack_sizes") 5662 if (StackSizeRelocMap.count(Sec) == 0) { 5663 StackSizeRelocMap[Sec] = NullSection; 5664 continue; 5665 } 5666 5667 // Check relocation sections if they are relocating contents of a 5668 // stack sizes section. 5669 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5670 uint32_t SectionType = ElfSec->sh_type; 5671 if (SectionType != ELF::SHT_RELA && SectionType != ELF::SHT_REL) 5672 continue; 5673 5674 Expected<section_iterator> RelSecOrErr = Sec.getRelocatedSection(); 5675 if (!RelSecOrErr) 5676 reportError(createStringError(object_error::parse_failed, 5677 "%s: failed to get a relocated section: %s", 5678 SectionName.data(), 5679 toString(RelSecOrErr.takeError()).c_str()), 5680 Obj->getFileName()); 5681 5682 const Elf_Shdr *ContentsSec = 5683 Obj->getSection((*RelSecOrErr)->getRawDataRefImpl()); 5684 Expected<StringRef> ContentsSectionNameOrErr = 5685 EF->getSectionName(ContentsSec); 5686 if (!ContentsSectionNameOrErr) { 5687 consumeError(ContentsSectionNameOrErr.takeError()); 5688 continue; 5689 } 5690 if (*ContentsSectionNameOrErr != ".stack_sizes") 5691 continue; 5692 // Insert a mapping from the stack sizes section to its relocation section. 5693 StackSizeRelocMap[Obj->toSectionRef(ContentsSec)] = Sec; 5694 } 5695 5696 for (const auto &StackSizeMapEntry : StackSizeRelocMap) { 5697 PrintHeader(); 5698 const SectionRef &StackSizesSec = StackSizeMapEntry.first; 5699 const SectionRef &RelocSec = StackSizeMapEntry.second; 5700 5701 // Warn about stack size sections without a relocation section. 5702 StringRef StackSizeSectionName = getSectionName(StackSizesSec); 5703 if (RelocSec == NullSection) { 5704 reportWarning(createError("section " + StackSizeSectionName + 5705 " does not have a corresponding " 5706 "relocation section"), 5707 Obj->getFileName()); 5708 continue; 5709 } 5710 5711 // A .stack_sizes section header's sh_link field is supposed to point 5712 // to the section that contains the functions whose stack sizes are 5713 // described in it. 5714 const Elf_Shdr *StackSizesELFSec = 5715 Obj->getSection(StackSizesSec.getRawDataRefImpl()); 5716 const SectionRef FunctionSec = Obj->toSectionRef(unwrapOrError( 5717 this->FileName, EF->getSection(StackSizesELFSec->sh_link))); 5718 5719 bool (*IsSupportedFn)(uint64_t); 5720 RelocationResolver Resolver; 5721 std::tie(IsSupportedFn, Resolver) = getRelocationResolver(*Obj); 5722 auto Contents = unwrapOrError(this->FileName, StackSizesSec.getContents()); 5723 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5724 for (const RelocationRef &Reloc : RelocSec.relocations()) { 5725 if (!IsSupportedFn || !IsSupportedFn(Reloc.getType())) 5726 reportError(createStringError( 5727 object_error::parse_failed, 5728 "unsupported relocation type in section %s: %s", 5729 getSectionName(RelocSec).data(), 5730 EF->getRelocationTypeName(Reloc.getType()).data()), 5731 Obj->getFileName()); 5732 this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName, 5733 Resolver, Data); 5734 } 5735 } 5736 } 5737 5738 template <class ELFT> 5739 void GNUStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 5740 bool HeaderHasBeenPrinted = false; 5741 auto PrintHeader = [&]() { 5742 if (HeaderHasBeenPrinted) 5743 return; 5744 OS << "\nStack Sizes:\n"; 5745 OS.PadToColumn(9); 5746 OS << "Size"; 5747 OS.PadToColumn(18); 5748 OS << "Function\n"; 5749 HeaderHasBeenPrinted = true; 5750 }; 5751 5752 // For non-relocatable objects, look directly for sections whose name starts 5753 // with .stack_sizes and process the contents. 5754 if (Obj->isRelocatableObject()) 5755 this->printRelocatableStackSizes(Obj, PrintHeader); 5756 else 5757 this->printNonRelocatableStackSizes(Obj, PrintHeader); 5758 } 5759 5760 template <class ELFT> 5761 void GNUStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 5762 size_t Bias = ELFT::Is64Bits ? 8 : 0; 5763 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 5764 OS.PadToColumn(2); 5765 OS << format_hex_no_prefix(Parser.getGotAddress(E), 8 + Bias); 5766 OS.PadToColumn(11 + Bias); 5767 OS << format_decimal(Parser.getGotOffset(E), 6) << "(gp)"; 5768 OS.PadToColumn(22 + Bias); 5769 OS << format_hex_no_prefix(*E, 8 + Bias); 5770 OS.PadToColumn(31 + 2 * Bias); 5771 OS << Purpose << "\n"; 5772 }; 5773 5774 OS << (Parser.IsStatic ? "Static GOT:\n" : "Primary GOT:\n"); 5775 OS << " Canonical gp value: " 5776 << format_hex_no_prefix(Parser.getGp(), 8 + Bias) << "\n\n"; 5777 5778 OS << " Reserved entries:\n"; 5779 if (ELFT::Is64Bits) 5780 OS << " Address Access Initial Purpose\n"; 5781 else 5782 OS << " Address Access Initial Purpose\n"; 5783 PrintEntry(Parser.getGotLazyResolver(), "Lazy resolver"); 5784 if (Parser.getGotModulePointer()) 5785 PrintEntry(Parser.getGotModulePointer(), "Module pointer (GNU extension)"); 5786 5787 if (!Parser.getLocalEntries().empty()) { 5788 OS << "\n"; 5789 OS << " Local entries:\n"; 5790 if (ELFT::Is64Bits) 5791 OS << " Address Access Initial\n"; 5792 else 5793 OS << " Address Access Initial\n"; 5794 for (auto &E : Parser.getLocalEntries()) 5795 PrintEntry(&E, ""); 5796 } 5797 5798 if (Parser.IsStatic) 5799 return; 5800 5801 if (!Parser.getGlobalEntries().empty()) { 5802 OS << "\n"; 5803 OS << " Global entries:\n"; 5804 if (ELFT::Is64Bits) 5805 OS << " Address Access Initial Sym.Val." 5806 << " Type Ndx Name\n"; 5807 else 5808 OS << " Address Access Initial Sym.Val. Type Ndx Name\n"; 5809 for (auto &E : Parser.getGlobalEntries()) { 5810 const Elf_Sym *Sym = Parser.getGotSym(&E); 5811 std::string SymName = this->dumper()->getFullSymbolName( 5812 Sym, this->dumper()->getDynamicStringTable(), false); 5813 5814 OS.PadToColumn(2); 5815 OS << to_string(format_hex_no_prefix(Parser.getGotAddress(&E), 8 + Bias)); 5816 OS.PadToColumn(11 + Bias); 5817 OS << to_string(format_decimal(Parser.getGotOffset(&E), 6)) + "(gp)"; 5818 OS.PadToColumn(22 + Bias); 5819 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5820 OS.PadToColumn(31 + 2 * Bias); 5821 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5822 OS.PadToColumn(40 + 3 * Bias); 5823 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5824 OS.PadToColumn(48 + 3 * Bias); 5825 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5826 this->dumper()->dynamic_symbols().begin()); 5827 OS.PadToColumn(52 + 3 * Bias); 5828 OS << SymName << "\n"; 5829 } 5830 } 5831 5832 if (!Parser.getOtherEntries().empty()) 5833 OS << "\n Number of TLS and multi-GOT entries " 5834 << Parser.getOtherEntries().size() << "\n"; 5835 } 5836 5837 template <class ELFT> 5838 void GNUStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 5839 size_t Bias = ELFT::Is64Bits ? 8 : 0; 5840 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 5841 OS.PadToColumn(2); 5842 OS << format_hex_no_prefix(Parser.getPltAddress(E), 8 + Bias); 5843 OS.PadToColumn(11 + Bias); 5844 OS << format_hex_no_prefix(*E, 8 + Bias); 5845 OS.PadToColumn(20 + 2 * Bias); 5846 OS << Purpose << "\n"; 5847 }; 5848 5849 OS << "PLT GOT:\n\n"; 5850 5851 OS << " Reserved entries:\n"; 5852 OS << " Address Initial Purpose\n"; 5853 PrintEntry(Parser.getPltLazyResolver(), "PLT lazy resolver"); 5854 if (Parser.getPltModulePointer()) 5855 PrintEntry(Parser.getPltModulePointer(), "Module pointer"); 5856 5857 if (!Parser.getPltEntries().empty()) { 5858 OS << "\n"; 5859 OS << " Entries:\n"; 5860 OS << " Address Initial Sym.Val. Type Ndx Name\n"; 5861 for (auto &E : Parser.getPltEntries()) { 5862 const Elf_Sym *Sym = Parser.getPltSym(&E); 5863 std::string SymName = this->dumper()->getFullSymbolName( 5864 Sym, this->dumper()->getDynamicStringTable(), false); 5865 5866 OS.PadToColumn(2); 5867 OS << to_string(format_hex_no_prefix(Parser.getPltAddress(&E), 8 + Bias)); 5868 OS.PadToColumn(11 + Bias); 5869 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5870 OS.PadToColumn(20 + 2 * Bias); 5871 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5872 OS.PadToColumn(29 + 3 * Bias); 5873 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5874 OS.PadToColumn(37 + 3 * Bias); 5875 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5876 this->dumper()->dynamic_symbols().begin()); 5877 OS.PadToColumn(41 + 3 * Bias); 5878 OS << SymName << "\n"; 5879 } 5880 } 5881 } 5882 5883 template <class ELFT> 5884 void GNUStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 5885 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 5886 const Elf_Shdr *Shdr = 5887 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 5888 if (!Shdr) 5889 return; 5890 5891 ArrayRef<uint8_t> Sec = 5892 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 5893 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) 5894 reportError(createError(".MIPS.abiflags section has a wrong size"), 5895 ObjF->getFileName()); 5896 5897 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 5898 5899 OS << "MIPS ABI Flags Version: " << Flags->version << "\n\n"; 5900 OS << "ISA: MIPS" << int(Flags->isa_level); 5901 if (Flags->isa_rev > 1) 5902 OS << "r" << int(Flags->isa_rev); 5903 OS << "\n"; 5904 OS << "GPR size: " << getMipsRegisterSize(Flags->gpr_size) << "\n"; 5905 OS << "CPR1 size: " << getMipsRegisterSize(Flags->cpr1_size) << "\n"; 5906 OS << "CPR2 size: " << getMipsRegisterSize(Flags->cpr2_size) << "\n"; 5907 OS << "FP ABI: " << printEnum(Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)) 5908 << "\n"; 5909 OS << "ISA Extension: " 5910 << printEnum(Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)) << "\n"; 5911 if (Flags->ases == 0) 5912 OS << "ASEs: None\n"; 5913 else 5914 // FIXME: Print each flag on a separate line. 5915 OS << "ASEs: " << printFlags(Flags->ases, makeArrayRef(ElfMipsASEFlags)) 5916 << "\n"; 5917 OS << "FLAGS 1: " << format_hex_no_prefix(Flags->flags1, 8, false) << "\n"; 5918 OS << "FLAGS 2: " << format_hex_no_prefix(Flags->flags2, 8, false) << "\n"; 5919 OS << "\n"; 5920 } 5921 5922 template <class ELFT> void LLVMStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 5923 const Elf_Ehdr *E = Obj->getHeader(); 5924 { 5925 DictScope D(W, "ElfHeader"); 5926 { 5927 DictScope D(W, "Ident"); 5928 W.printBinary("Magic", makeArrayRef(E->e_ident).slice(ELF::EI_MAG0, 4)); 5929 W.printEnum("Class", E->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 5930 W.printEnum("DataEncoding", E->e_ident[ELF::EI_DATA], 5931 makeArrayRef(ElfDataEncoding)); 5932 W.printNumber("FileVersion", E->e_ident[ELF::EI_VERSION]); 5933 5934 auto OSABI = makeArrayRef(ElfOSABI); 5935 if (E->e_ident[ELF::EI_OSABI] >= ELF::ELFOSABI_FIRST_ARCH && 5936 E->e_ident[ELF::EI_OSABI] <= ELF::ELFOSABI_LAST_ARCH) { 5937 switch (E->e_machine) { 5938 case ELF::EM_AMDGPU: 5939 OSABI = makeArrayRef(AMDGPUElfOSABI); 5940 break; 5941 case ELF::EM_ARM: 5942 OSABI = makeArrayRef(ARMElfOSABI); 5943 break; 5944 case ELF::EM_TI_C6000: 5945 OSABI = makeArrayRef(C6000ElfOSABI); 5946 break; 5947 } 5948 } 5949 W.printEnum("OS/ABI", E->e_ident[ELF::EI_OSABI], OSABI); 5950 W.printNumber("ABIVersion", E->e_ident[ELF::EI_ABIVERSION]); 5951 W.printBinary("Unused", makeArrayRef(E->e_ident).slice(ELF::EI_PAD)); 5952 } 5953 5954 W.printEnum("Type", E->e_type, makeArrayRef(ElfObjectFileType)); 5955 W.printEnum("Machine", E->e_machine, makeArrayRef(ElfMachineType)); 5956 W.printNumber("Version", E->e_version); 5957 W.printHex("Entry", E->e_entry); 5958 W.printHex("ProgramHeaderOffset", E->e_phoff); 5959 W.printHex("SectionHeaderOffset", E->e_shoff); 5960 if (E->e_machine == EM_MIPS) 5961 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderMipsFlags), 5962 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 5963 unsigned(ELF::EF_MIPS_MACH)); 5964 else if (E->e_machine == EM_AMDGPU) 5965 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderAMDGPUFlags), 5966 unsigned(ELF::EF_AMDGPU_MACH)); 5967 else if (E->e_machine == EM_RISCV) 5968 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 5969 else 5970 W.printFlags("Flags", E->e_flags); 5971 W.printNumber("HeaderSize", E->e_ehsize); 5972 W.printNumber("ProgramHeaderEntrySize", E->e_phentsize); 5973 W.printNumber("ProgramHeaderCount", E->e_phnum); 5974 W.printNumber("SectionHeaderEntrySize", E->e_shentsize); 5975 W.printString("SectionHeaderCount", 5976 getSectionHeadersNumString(Obj, this->FileName)); 5977 W.printString("StringTableSectionIndex", 5978 getSectionHeaderTableIndexString(Obj, this->FileName)); 5979 } 5980 } 5981 5982 template <class ELFT> 5983 void LLVMStyle<ELFT>::printGroupSections(const ELFO *Obj) { 5984 DictScope Lists(W, "Groups"); 5985 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 5986 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 5987 for (const GroupSection &G : V) { 5988 DictScope D(W, "Group"); 5989 W.printNumber("Name", G.Name, G.ShName); 5990 W.printNumber("Index", G.Index); 5991 W.printNumber("Link", G.Link); 5992 W.printNumber("Info", G.Info); 5993 W.printHex("Type", getGroupType(G.Type), G.Type); 5994 W.startLine() << "Signature: " << G.Signature << "\n"; 5995 5996 ListScope L(W, "Section(s) in group"); 5997 for (const GroupMember &GM : G.Members) { 5998 const GroupSection *MainGroup = Map[GM.Index]; 5999 if (MainGroup != &G) { 6000 W.flush(); 6001 errs() << "Error: " << GM.Name << " (" << GM.Index 6002 << ") in a group " + G.Name + " (" << G.Index 6003 << ") is already in a group " + MainGroup->Name + " (" 6004 << MainGroup->Index << ")\n"; 6005 errs().flush(); 6006 continue; 6007 } 6008 W.startLine() << GM.Name << " (" << GM.Index << ")\n"; 6009 } 6010 } 6011 6012 if (V.empty()) 6013 W.startLine() << "There are no group sections in the file.\n"; 6014 } 6015 6016 template <class ELFT> void LLVMStyle<ELFT>::printRelocations(const ELFO *Obj) { 6017 ListScope D(W, "Relocations"); 6018 6019 int SectionNumber = -1; 6020 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 6021 ++SectionNumber; 6022 6023 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 6024 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 6025 Sec.sh_type != ELF::SHT_ANDROID_RELA && 6026 Sec.sh_type != ELF::SHT_ANDROID_RELR) 6027 continue; 6028 6029 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 6030 6031 W.startLine() << "Section (" << SectionNumber << ") " << Name << " {\n"; 6032 W.indent(); 6033 6034 printRelocations(&Sec, Obj); 6035 6036 W.unindent(); 6037 W.startLine() << "}\n"; 6038 } 6039 } 6040 6041 template <class ELFT> 6042 void LLVMStyle<ELFT>::printRelocations(const Elf_Shdr *Sec, const ELFO *Obj) { 6043 const Elf_Shdr *SymTab = 6044 unwrapOrError(this->FileName, Obj->getSection(Sec->sh_link)); 6045 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 6046 unsigned RelNdx = 0; 6047 6048 switch (Sec->sh_type) { 6049 case ELF::SHT_REL: 6050 for (const Elf_Rel &R : unwrapOrError(this->FileName, Obj->rels(Sec))) { 6051 Elf_Rela Rela; 6052 Rela.r_offset = R.r_offset; 6053 Rela.r_info = R.r_info; 6054 Rela.r_addend = 0; 6055 printRelocation(Obj, SecNdx, Rela, ++RelNdx, SymTab); 6056 } 6057 break; 6058 case ELF::SHT_RELA: 6059 for (const Elf_Rela &R : unwrapOrError(this->FileName, Obj->relas(Sec))) 6060 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6061 break; 6062 case ELF::SHT_RELR: 6063 case ELF::SHT_ANDROID_RELR: { 6064 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(Sec)); 6065 if (opts::RawRelr) { 6066 for (const Elf_Relr &R : Relrs) 6067 W.startLine() << W.hex(R) << "\n"; 6068 } else { 6069 std::vector<Elf_Rela> RelrRelas = 6070 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 6071 for (const Elf_Rela &R : RelrRelas) 6072 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6073 } 6074 break; 6075 } 6076 case ELF::SHT_ANDROID_REL: 6077 case ELF::SHT_ANDROID_RELA: 6078 for (const Elf_Rela &R : 6079 unwrapOrError(this->FileName, Obj->android_relas(Sec))) 6080 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 6081 break; 6082 } 6083 } 6084 6085 template <class ELFT> 6086 void LLVMStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 6087 Elf_Rela Rel, unsigned RelIndex, 6088 const Elf_Shdr *SymTab) { 6089 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 6090 this->dumper()->getRelocationTarget(SymTab, Rel); 6091 if (!Target) { 6092 this->reportUniqueWarning(createError( 6093 "unable to print relocation " + Twine(RelIndex) + " in section " + 6094 Twine(SecIndex) + ": " + toString(Target.takeError()))); 6095 return; 6096 } 6097 6098 std::string TargetName = Target->second; 6099 SmallString<32> RelocName; 6100 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 6101 6102 if (opts::ExpandRelocs) { 6103 DictScope Group(W, "Relocation"); 6104 W.printHex("Offset", Rel.r_offset); 6105 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 6106 W.printNumber("Symbol", !TargetName.empty() ? TargetName : "-", 6107 Rel.getSymbol(Obj->isMips64EL())); 6108 W.printHex("Addend", Rel.r_addend); 6109 } else { 6110 raw_ostream &OS = W.startLine(); 6111 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 6112 << (!TargetName.empty() ? TargetName : "-") << " " << W.hex(Rel.r_addend) 6113 << "\n"; 6114 } 6115 } 6116 6117 template <class ELFT> 6118 void LLVMStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 6119 ListScope SectionsD(W, "Sections"); 6120 6121 int SectionIndex = -1; 6122 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 6123 std::vector<EnumEntry<unsigned>> FlagsList = 6124 getSectionFlagsForTarget(Obj->getHeader()->e_machine); 6125 for (const Elf_Shdr &Sec : Sections) { 6126 StringRef Name = "<?>"; 6127 if (Expected<StringRef> SecNameOrErr = 6128 Obj->getSectionName(&Sec, this->dumper()->WarningHandler)) 6129 Name = *SecNameOrErr; 6130 else 6131 this->reportUniqueWarning(SecNameOrErr.takeError()); 6132 6133 DictScope SectionD(W, "Section"); 6134 W.printNumber("Index", ++SectionIndex); 6135 W.printNumber("Name", Name, Sec.sh_name); 6136 W.printHex( 6137 "Type", 6138 object::getELFSectionTypeName(Obj->getHeader()->e_machine, Sec.sh_type), 6139 Sec.sh_type); 6140 W.printFlags("Flags", Sec.sh_flags, makeArrayRef(FlagsList)); 6141 W.printHex("Address", Sec.sh_addr); 6142 W.printHex("Offset", Sec.sh_offset); 6143 W.printNumber("Size", Sec.sh_size); 6144 W.printNumber("Link", Sec.sh_link); 6145 W.printNumber("Info", Sec.sh_info); 6146 W.printNumber("AddressAlignment", Sec.sh_addralign); 6147 W.printNumber("EntrySize", Sec.sh_entsize); 6148 6149 if (opts::SectionRelocations) { 6150 ListScope D(W, "Relocations"); 6151 printRelocations(&Sec, Obj); 6152 } 6153 6154 if (opts::SectionSymbols) { 6155 ListScope D(W, "Symbols"); 6156 const Elf_Shdr *Symtab = this->dumper()->getDotSymtabSec(); 6157 StringRef StrTable = 6158 unwrapOrError(this->FileName, Obj->getStringTableForSymtab(*Symtab)); 6159 6160 for (const Elf_Sym &Sym : 6161 unwrapOrError(this->FileName, Obj->symbols(Symtab))) { 6162 const Elf_Shdr *SymSec = unwrapOrError( 6163 this->FileName, 6164 Obj->getSection(&Sym, Symtab, this->dumper()->getShndxTable())); 6165 if (SymSec == &Sec) 6166 printSymbol( 6167 Obj, &Sym, 6168 unwrapOrError(this->FileName, Obj->symbols(Symtab)).begin(), 6169 StrTable, false, false); 6170 } 6171 } 6172 6173 if (opts::SectionData && Sec.sh_type != ELF::SHT_NOBITS) { 6174 ArrayRef<uint8_t> Data = 6175 unwrapOrError(this->FileName, Obj->getSectionContents(&Sec)); 6176 W.printBinaryBlock( 6177 "SectionData", 6178 StringRef(reinterpret_cast<const char *>(Data.data()), Data.size())); 6179 } 6180 } 6181 } 6182 6183 template <class ELFT> 6184 void LLVMStyle<ELFT>::printSymbolSection(const Elf_Sym *Symbol, 6185 const Elf_Sym *First) { 6186 Expected<unsigned> SectionIndex = 6187 this->dumper()->getSymbolSectionIndex(Symbol, First); 6188 if (!SectionIndex) { 6189 assert(Symbol->st_shndx == SHN_XINDEX && 6190 "getSymbolSectionIndex should only fail due to an invalid " 6191 "SHT_SYMTAB_SHNDX table/reference"); 6192 this->reportUniqueWarning(SectionIndex.takeError()); 6193 W.printHex("Section", "Reserved", SHN_XINDEX); 6194 return; 6195 } 6196 6197 Expected<StringRef> SectionName = 6198 this->dumper()->getSymbolSectionName(Symbol, *SectionIndex); 6199 if (!SectionName) { 6200 // Don't report an invalid section name if the section headers are missing. 6201 // In such situations, all sections will be "invalid". 6202 if (!this->dumper()->getElfObject()->sections().empty()) 6203 this->reportUniqueWarning(SectionName.takeError()); 6204 else 6205 consumeError(SectionName.takeError()); 6206 W.printHex("Section", "<?>", *SectionIndex); 6207 } else { 6208 W.printHex("Section", *SectionName, *SectionIndex); 6209 } 6210 } 6211 6212 template <class ELFT> 6213 void LLVMStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 6214 const Elf_Sym *First, StringRef StrTable, 6215 bool IsDynamic, 6216 bool /*NonVisibilityBitsUsed*/) { 6217 std::string FullSymbolName = 6218 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 6219 unsigned char SymbolType = Symbol->getType(); 6220 6221 DictScope D(W, "Symbol"); 6222 W.printNumber("Name", FullSymbolName, Symbol->st_name); 6223 W.printHex("Value", Symbol->st_value); 6224 W.printNumber("Size", Symbol->st_size); 6225 W.printEnum("Binding", Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 6226 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 6227 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 6228 W.printEnum("Type", SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 6229 else 6230 W.printEnum("Type", SymbolType, makeArrayRef(ElfSymbolTypes)); 6231 if (Symbol->st_other == 0) 6232 // Usually st_other flag is zero. Do not pollute the output 6233 // by flags enumeration in that case. 6234 W.printNumber("Other", 0); 6235 else { 6236 std::vector<EnumEntry<unsigned>> SymOtherFlags(std::begin(ElfSymOtherFlags), 6237 std::end(ElfSymOtherFlags)); 6238 if (Obj->getHeader()->e_machine == EM_MIPS) { 6239 // Someones in their infinite wisdom decided to make STO_MIPS_MIPS16 6240 // flag overlapped with other ST_MIPS_xxx flags. So consider both 6241 // cases separately. 6242 if ((Symbol->st_other & STO_MIPS_MIPS16) == STO_MIPS_MIPS16) 6243 SymOtherFlags.insert(SymOtherFlags.end(), 6244 std::begin(ElfMips16SymOtherFlags), 6245 std::end(ElfMips16SymOtherFlags)); 6246 else 6247 SymOtherFlags.insert(SymOtherFlags.end(), 6248 std::begin(ElfMipsSymOtherFlags), 6249 std::end(ElfMipsSymOtherFlags)); 6250 } 6251 W.printFlags("Other", Symbol->st_other, makeArrayRef(SymOtherFlags), 0x3u); 6252 } 6253 printSymbolSection(Symbol, First); 6254 } 6255 6256 template <class ELFT> 6257 void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 6258 bool PrintDynamicSymbols) { 6259 if (PrintSymbols) 6260 printSymbols(Obj); 6261 if (PrintDynamicSymbols) 6262 printDynamicSymbols(Obj); 6263 } 6264 6265 template <class ELFT> void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj) { 6266 ListScope Group(W, "Symbols"); 6267 this->dumper()->printSymbolsHelper(false); 6268 } 6269 6270 template <class ELFT> 6271 void LLVMStyle<ELFT>::printDynamicSymbols(const ELFO *Obj) { 6272 ListScope Group(W, "DynamicSymbols"); 6273 this->dumper()->printSymbolsHelper(true); 6274 } 6275 6276 template <class ELFT> void LLVMStyle<ELFT>::printDynamic(const ELFFile<ELFT> *Obj) { 6277 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 6278 if (Table.empty()) 6279 return; 6280 6281 W.startLine() << "DynamicSection [ (" << Table.size() << " entries)\n"; 6282 6283 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table); 6284 // The "Name/Value" column should be indented from the "Type" column by N 6285 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 6286 // space (1) = -3. 6287 W.startLine() << " Tag" << std::string(ELFT::Is64Bits ? 16 : 8, ' ') 6288 << "Type" << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 6289 6290 std::string ValueFmt = "%-" + std::to_string(MaxTagSize) + "s "; 6291 for (auto Entry : Table) { 6292 uintX_t Tag = Entry.getTag(); 6293 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 6294 W.startLine() << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10, true) 6295 << " " 6296 << format(ValueFmt.c_str(), 6297 Obj->getDynamicTagAsString(Tag).c_str()) 6298 << Value << "\n"; 6299 } 6300 W.startLine() << "]\n"; 6301 } 6302 6303 template <class ELFT> 6304 void LLVMStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 6305 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 6306 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 6307 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 6308 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 6309 if (DynRelRegion.Size && DynRelaRegion.Size) 6310 report_fatal_error("There are both REL and RELA dynamic relocations"); 6311 W.startLine() << "Dynamic Relocations {\n"; 6312 W.indent(); 6313 if (DynRelaRegion.Size > 0) 6314 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 6315 printDynamicRelocation(Obj, Rela); 6316 else 6317 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 6318 Elf_Rela Rela; 6319 Rela.r_offset = Rel.r_offset; 6320 Rela.r_info = Rel.r_info; 6321 Rela.r_addend = 0; 6322 printDynamicRelocation(Obj, Rela); 6323 } 6324 if (DynRelrRegion.Size > 0) { 6325 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 6326 std::vector<Elf_Rela> RelrRelas = 6327 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 6328 for (const Elf_Rela &Rela : RelrRelas) 6329 printDynamicRelocation(Obj, Rela); 6330 } 6331 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) 6332 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 6333 printDynamicRelocation(Obj, Rela); 6334 else 6335 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 6336 Elf_Rela Rela; 6337 Rela.r_offset = Rel.r_offset; 6338 Rela.r_info = Rel.r_info; 6339 Rela.r_addend = 0; 6340 printDynamicRelocation(Obj, Rela); 6341 } 6342 W.unindent(); 6343 W.startLine() << "}\n"; 6344 } 6345 6346 template <class ELFT> 6347 void LLVMStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel) { 6348 SmallString<32> RelocName; 6349 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 6350 std::string SymbolName = 6351 getSymbolForReloc(Obj, this->FileName, this->dumper(), Rel).Name; 6352 6353 if (opts::ExpandRelocs) { 6354 DictScope Group(W, "Relocation"); 6355 W.printHex("Offset", Rel.r_offset); 6356 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 6357 W.printString("Symbol", !SymbolName.empty() ? SymbolName : "-"); 6358 W.printHex("Addend", Rel.r_addend); 6359 } else { 6360 raw_ostream &OS = W.startLine(); 6361 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 6362 << (!SymbolName.empty() ? SymbolName : "-") << " " << W.hex(Rel.r_addend) 6363 << "\n"; 6364 } 6365 } 6366 6367 template <class ELFT> 6368 void LLVMStyle<ELFT>::printProgramHeaders( 6369 const ELFO *Obj, bool PrintProgramHeaders, 6370 cl::boolOrDefault PrintSectionMapping) { 6371 if (PrintProgramHeaders) 6372 printProgramHeaders(Obj); 6373 if (PrintSectionMapping == cl::BOU_TRUE) 6374 printSectionMapping(Obj); 6375 } 6376 6377 template <class ELFT> 6378 void LLVMStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 6379 ListScope L(W, "ProgramHeaders"); 6380 6381 for (const Elf_Phdr &Phdr : 6382 unwrapOrError(this->FileName, Obj->program_headers())) { 6383 DictScope P(W, "ProgramHeader"); 6384 W.printHex("Type", 6385 getElfSegmentType(Obj->getHeader()->e_machine, Phdr.p_type), 6386 Phdr.p_type); 6387 W.printHex("Offset", Phdr.p_offset); 6388 W.printHex("VirtualAddress", Phdr.p_vaddr); 6389 W.printHex("PhysicalAddress", Phdr.p_paddr); 6390 W.printNumber("FileSize", Phdr.p_filesz); 6391 W.printNumber("MemSize", Phdr.p_memsz); 6392 W.printFlags("Flags", Phdr.p_flags, makeArrayRef(ElfSegmentFlags)); 6393 W.printNumber("Alignment", Phdr.p_align); 6394 } 6395 } 6396 6397 template <class ELFT> 6398 void LLVMStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 6399 const Elf_Shdr *Sec) { 6400 ListScope SS(W, "VersionSymbols"); 6401 if (!Sec) 6402 return; 6403 6404 StringRef StrTable; 6405 ArrayRef<Elf_Sym> Syms; 6406 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 6407 this->dumper()->getVersionTable(Sec, &Syms, &StrTable); 6408 if (!VerTableOrErr) { 6409 this->reportUniqueWarning(VerTableOrErr.takeError()); 6410 return; 6411 } 6412 6413 if (StrTable.empty() || Syms.empty() || Syms.size() != VerTableOrErr->size()) 6414 return; 6415 6416 for (size_t I = 0, E = Syms.size(); I < E; ++I) { 6417 DictScope S(W, "Symbol"); 6418 W.printNumber("Version", (*VerTableOrErr)[I].vs_index & VERSYM_VERSION); 6419 W.printString("Name", this->dumper()->getFullSymbolName( 6420 &Syms[I], StrTable, /*IsDynamic=*/true)); 6421 } 6422 } 6423 6424 template <class ELFT> 6425 void LLVMStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 6426 const Elf_Shdr *Sec) { 6427 ListScope SD(W, "VersionDefinitions"); 6428 if (!Sec) 6429 return; 6430 6431 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 6432 if (!V) { 6433 this->reportUniqueWarning(V.takeError()); 6434 return; 6435 } 6436 6437 for (const VerDef &D : *V) { 6438 DictScope Def(W, "Definition"); 6439 W.printNumber("Version", D.Version); 6440 W.printFlags("Flags", D.Flags, makeArrayRef(SymVersionFlags)); 6441 W.printNumber("Index", D.Ndx); 6442 W.printNumber("Hash", D.Hash); 6443 W.printString("Name", D.Name.c_str()); 6444 W.printList( 6445 "Predecessors", D.AuxV, 6446 [](raw_ostream &OS, const VerdAux &Aux) { OS << Aux.Name.c_str(); }); 6447 } 6448 } 6449 6450 template <class ELFT> 6451 void LLVMStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 6452 const Elf_Shdr *Sec) { 6453 ListScope SD(W, "VersionRequirements"); 6454 if (!Sec) 6455 return; 6456 6457 Expected<std::vector<VerNeed>> V = 6458 this->dumper()->getVersionDependencies(Sec); 6459 if (!V) { 6460 this->reportUniqueWarning(V.takeError()); 6461 return; 6462 } 6463 6464 for (const VerNeed &VN : *V) { 6465 DictScope Entry(W, "Dependency"); 6466 W.printNumber("Version", VN.Version); 6467 W.printNumber("Count", VN.Cnt); 6468 W.printString("FileName", VN.File.c_str()); 6469 6470 ListScope L(W, "Entries"); 6471 for (const VernAux &Aux : VN.AuxV) { 6472 DictScope Entry(W, "Entry"); 6473 W.printNumber("Hash", Aux.Hash); 6474 W.printFlags("Flags", Aux.Flags, makeArrayRef(SymVersionFlags)); 6475 W.printNumber("Index", Aux.Other); 6476 W.printString("Name", Aux.Name.c_str()); 6477 } 6478 } 6479 } 6480 6481 template <class ELFT> 6482 void LLVMStyle<ELFT>::printHashHistograms(const ELFFile<ELFT> *Obj) { 6483 W.startLine() << "Hash Histogram not implemented!\n"; 6484 } 6485 6486 template <class ELFT> 6487 void LLVMStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 6488 ListScope L(W, "CGProfile"); 6489 if (!this->dumper()->getDotCGProfileSec()) 6490 return; 6491 auto CGProfile = unwrapOrError( 6492 this->FileName, Obj->template getSectionContentsAsArray<Elf_CGProfile>( 6493 this->dumper()->getDotCGProfileSec())); 6494 for (const Elf_CGProfile &CGPE : CGProfile) { 6495 DictScope D(W, "CGProfileEntry"); 6496 W.printNumber( 6497 "From", 6498 unwrapOrError(this->FileName, 6499 this->dumper()->getStaticSymbolName(CGPE.cgp_from)), 6500 CGPE.cgp_from); 6501 W.printNumber( 6502 "To", 6503 unwrapOrError(this->FileName, 6504 this->dumper()->getStaticSymbolName(CGPE.cgp_to)), 6505 CGPE.cgp_to); 6506 W.printNumber("Weight", CGPE.cgp_weight); 6507 } 6508 } 6509 6510 static Expected<std::vector<uint64_t>> toULEB128Array(ArrayRef<uint8_t> Data) { 6511 std::vector<uint64_t> Ret; 6512 const uint8_t *Cur = Data.begin(); 6513 const uint8_t *End = Data.end(); 6514 while (Cur != End) { 6515 unsigned Size; 6516 const char *Err; 6517 Ret.push_back(decodeULEB128(Cur, &Size, End, &Err)); 6518 if (Err) 6519 return createError(Err); 6520 Cur += Size; 6521 } 6522 return Ret; 6523 } 6524 6525 template <class ELFT> 6526 void LLVMStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 6527 ListScope L(W, "Addrsig"); 6528 if (!this->dumper()->getDotAddrsigSec()) 6529 return; 6530 ArrayRef<uint8_t> Contents = unwrapOrError( 6531 this->FileName, 6532 Obj->getSectionContents(this->dumper()->getDotAddrsigSec())); 6533 Expected<std::vector<uint64_t>> V = toULEB128Array(Contents); 6534 if (!V) { 6535 reportWarning(V.takeError(), this->FileName); 6536 return; 6537 } 6538 6539 for (uint64_t Sym : *V) { 6540 Expected<std::string> NameOrErr = this->dumper()->getStaticSymbolName(Sym); 6541 if (NameOrErr) { 6542 W.printNumber("Sym", *NameOrErr, Sym); 6543 continue; 6544 } 6545 reportWarning(NameOrErr.takeError(), this->FileName); 6546 W.printNumber("Sym", "<?>", Sym); 6547 } 6548 } 6549 6550 template <typename ELFT> 6551 static void printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc, 6552 ScopedPrinter &W) { 6553 switch (NoteType) { 6554 default: 6555 return; 6556 case ELF::NT_GNU_ABI_TAG: { 6557 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 6558 if (!AbiTag.IsValid) { 6559 W.printString("ABI", "<corrupt GNU_ABI_TAG>"); 6560 } else { 6561 W.printString("OS", AbiTag.OSName); 6562 W.printString("ABI", AbiTag.ABI); 6563 } 6564 break; 6565 } 6566 case ELF::NT_GNU_BUILD_ID: { 6567 W.printString("Build ID", getGNUBuildId(Desc)); 6568 break; 6569 } 6570 case ELF::NT_GNU_GOLD_VERSION: 6571 W.printString("Version", getGNUGoldVersion(Desc)); 6572 break; 6573 case ELF::NT_GNU_PROPERTY_TYPE_0: 6574 ListScope D(W, "Property"); 6575 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 6576 W.printString(Property); 6577 break; 6578 } 6579 } 6580 6581 static void printCoreNoteLLVMStyle(const CoreNote &Note, ScopedPrinter &W) { 6582 W.printNumber("Page Size", Note.PageSize); 6583 for (const CoreFileMapping &Mapping : Note.Mappings) { 6584 ListScope D(W, "Mapping"); 6585 W.printHex("Start", Mapping.Start); 6586 W.printHex("End", Mapping.End); 6587 W.printHex("Offset", Mapping.Offset); 6588 W.printString("Filename", Mapping.Filename); 6589 } 6590 } 6591 6592 template <class ELFT> 6593 void LLVMStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 6594 ListScope L(W, "Notes"); 6595 6596 auto PrintHeader = [&](Optional<StringRef> SecName, 6597 const typename ELFT::Off Offset, 6598 const typename ELFT::Addr Size) { 6599 W.printString("Name", SecName ? *SecName : "<?>"); 6600 W.printHex("Offset", Offset); 6601 W.printHex("Size", Size); 6602 }; 6603 6604 auto ProcessNote = [&](const Elf_Note &Note) { 6605 DictScope D2(W, "Note"); 6606 StringRef Name = Note.getName(); 6607 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 6608 Elf_Word Type = Note.getType(); 6609 6610 // Print the note owner/type. 6611 W.printString("Owner", Name); 6612 W.printHex("Data size", Descriptor.size()); 6613 if (Name == "GNU") { 6614 W.printString("Type", getGNUNoteTypeName(Type)); 6615 } else if (Name == "FreeBSD") { 6616 W.printString("Type", getFreeBSDNoteTypeName(Type)); 6617 } else if (Name == "AMD") { 6618 W.printString("Type", getAMDNoteTypeName(Type)); 6619 } else if (Name == "AMDGPU") { 6620 W.printString("Type", getAMDGPUNoteTypeName(Type)); 6621 } else { 6622 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 6623 ? getCoreNoteTypeName(Type) 6624 : getGenericNoteTypeName(Type); 6625 if (!NoteType.empty()) 6626 W.printString("Type", NoteType); 6627 else 6628 W.printString("Type", 6629 "Unknown (" + to_string(format_hex(Type, 10)) + ")"); 6630 } 6631 6632 // Print the description, or fallback to printing raw bytes for unknown 6633 // owners. 6634 if (Name == "GNU") { 6635 printGNUNoteLLVMStyle<ELFT>(Type, Descriptor, W); 6636 } else if (Name == "AMD") { 6637 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 6638 if (!N.Type.empty()) 6639 W.printString(N.Type, N.Value); 6640 } else if (Name == "AMDGPU") { 6641 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 6642 if (!N.Type.empty()) 6643 W.printString(N.Type, N.Value); 6644 } else if (Name == "CORE") { 6645 if (Type == ELF::NT_FILE) { 6646 DataExtractor DescExtractor(Descriptor, 6647 ELFT::TargetEndianness == support::little, 6648 sizeof(Elf_Addr)); 6649 Expected<CoreNote> Note = readCoreNote(DescExtractor); 6650 if (Note) 6651 printCoreNoteLLVMStyle(*Note, W); 6652 else 6653 reportWarning(Note.takeError(), this->FileName); 6654 } 6655 } else if (!Descriptor.empty()) { 6656 W.printBinaryBlock("Description data", Descriptor); 6657 } 6658 }; 6659 6660 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 6661 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 6662 for (const auto &S : Sections) { 6663 if (S.sh_type != SHT_NOTE) 6664 continue; 6665 DictScope D(W, "NoteSection"); 6666 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 6667 S.sh_size); 6668 Error Err = Error::success(); 6669 for (auto Note : Obj->notes(S, Err)) 6670 ProcessNote(Note); 6671 if (Err) 6672 reportError(std::move(Err), this->FileName); 6673 } 6674 } else { 6675 for (const auto &P : 6676 unwrapOrError(this->FileName, Obj->program_headers())) { 6677 if (P.p_type != PT_NOTE) 6678 continue; 6679 DictScope D(W, "NoteSection"); 6680 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 6681 Error Err = Error::success(); 6682 for (auto Note : Obj->notes(P, Err)) 6683 ProcessNote(Note); 6684 if (Err) 6685 reportError(std::move(Err), this->FileName); 6686 } 6687 } 6688 } 6689 6690 template <class ELFT> 6691 void LLVMStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 6692 ListScope L(W, "LinkerOptions"); 6693 6694 unsigned I = -1; 6695 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 6696 ++I; 6697 if (Shdr.sh_type != ELF::SHT_LLVM_LINKER_OPTIONS) 6698 continue; 6699 6700 ArrayRef<uint8_t> Contents = 6701 unwrapOrError(this->FileName, Obj->getSectionContents(&Shdr)); 6702 if (Contents.empty()) 6703 continue; 6704 6705 if (Contents.back() != 0) { 6706 reportWarning(createError("SHT_LLVM_LINKER_OPTIONS section at index " + 6707 Twine(I) + 6708 " is broken: the " 6709 "content is not null-terminated"), 6710 this->FileName); 6711 continue; 6712 } 6713 6714 SmallVector<StringRef, 16> Strings; 6715 toStringRef(Contents.drop_back()).split(Strings, '\0'); 6716 if (Strings.size() % 2 != 0) { 6717 reportWarning( 6718 createError( 6719 "SHT_LLVM_LINKER_OPTIONS section at index " + Twine(I) + 6720 " is broken: an incomplete " 6721 "key-value pair was found. The last possible key was: \"" + 6722 Strings.back() + "\""), 6723 this->FileName); 6724 continue; 6725 } 6726 6727 for (size_t I = 0; I < Strings.size(); I += 2) 6728 W.printString(Strings[I], Strings[I + 1]); 6729 } 6730 } 6731 6732 template <class ELFT> 6733 void LLVMStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 6734 ListScope L(W, "DependentLibs"); 6735 this->printDependentLibsHelper( 6736 Obj, [](const Elf_Shdr &) {}, 6737 [this](StringRef Lib, uint64_t) { W.printString(Lib); }); 6738 } 6739 6740 template <class ELFT> 6741 void LLVMStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 6742 ListScope L(W, "StackSizes"); 6743 if (Obj->isRelocatableObject()) 6744 this->printRelocatableStackSizes(Obj, []() {}); 6745 else 6746 this->printNonRelocatableStackSizes(Obj, []() {}); 6747 } 6748 6749 template <class ELFT> 6750 void LLVMStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 6751 DictScope D(W, "Entry"); 6752 W.printString("Function", FuncName); 6753 W.printHex("Size", Size); 6754 } 6755 6756 template <class ELFT> 6757 void LLVMStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 6758 auto PrintEntry = [&](const Elf_Addr *E) { 6759 W.printHex("Address", Parser.getGotAddress(E)); 6760 W.printNumber("Access", Parser.getGotOffset(E)); 6761 W.printHex("Initial", *E); 6762 }; 6763 6764 DictScope GS(W, Parser.IsStatic ? "Static GOT" : "Primary GOT"); 6765 6766 W.printHex("Canonical gp value", Parser.getGp()); 6767 { 6768 ListScope RS(W, "Reserved entries"); 6769 { 6770 DictScope D(W, "Entry"); 6771 PrintEntry(Parser.getGotLazyResolver()); 6772 W.printString("Purpose", StringRef("Lazy resolver")); 6773 } 6774 6775 if (Parser.getGotModulePointer()) { 6776 DictScope D(W, "Entry"); 6777 PrintEntry(Parser.getGotModulePointer()); 6778 W.printString("Purpose", StringRef("Module pointer (GNU extension)")); 6779 } 6780 } 6781 { 6782 ListScope LS(W, "Local entries"); 6783 for (auto &E : Parser.getLocalEntries()) { 6784 DictScope D(W, "Entry"); 6785 PrintEntry(&E); 6786 } 6787 } 6788 6789 if (Parser.IsStatic) 6790 return; 6791 6792 { 6793 ListScope GS(W, "Global entries"); 6794 for (auto &E : Parser.getGlobalEntries()) { 6795 DictScope D(W, "Entry"); 6796 6797 PrintEntry(&E); 6798 6799 const Elf_Sym *Sym = Parser.getGotSym(&E); 6800 W.printHex("Value", Sym->st_value); 6801 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6802 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6803 6804 std::string SymName = this->dumper()->getFullSymbolName( 6805 Sym, this->dumper()->getDynamicStringTable(), true); 6806 W.printNumber("Name", SymName, Sym->st_name); 6807 } 6808 } 6809 6810 W.printNumber("Number of TLS and multi-GOT entries", 6811 uint64_t(Parser.getOtherEntries().size())); 6812 } 6813 6814 template <class ELFT> 6815 void LLVMStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 6816 auto PrintEntry = [&](const Elf_Addr *E) { 6817 W.printHex("Address", Parser.getPltAddress(E)); 6818 W.printHex("Initial", *E); 6819 }; 6820 6821 DictScope GS(W, "PLT GOT"); 6822 6823 { 6824 ListScope RS(W, "Reserved entries"); 6825 { 6826 DictScope D(W, "Entry"); 6827 PrintEntry(Parser.getPltLazyResolver()); 6828 W.printString("Purpose", StringRef("PLT lazy resolver")); 6829 } 6830 6831 if (auto E = Parser.getPltModulePointer()) { 6832 DictScope D(W, "Entry"); 6833 PrintEntry(E); 6834 W.printString("Purpose", StringRef("Module pointer")); 6835 } 6836 } 6837 { 6838 ListScope LS(W, "Entries"); 6839 for (auto &E : Parser.getPltEntries()) { 6840 DictScope D(W, "Entry"); 6841 PrintEntry(&E); 6842 6843 const Elf_Sym *Sym = Parser.getPltSym(&E); 6844 W.printHex("Value", Sym->st_value); 6845 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6846 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6847 6848 std::string SymName = 6849 this->dumper()->getFullSymbolName(Sym, Parser.getPltStrTable(), true); 6850 W.printNumber("Name", SymName, Sym->st_name); 6851 } 6852 } 6853 } 6854 6855 template <class ELFT> 6856 void LLVMStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 6857 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 6858 const Elf_Shdr *Shdr = 6859 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 6860 if (!Shdr) { 6861 W.startLine() << "There is no .MIPS.abiflags section in the file.\n"; 6862 return; 6863 } 6864 ArrayRef<uint8_t> Sec = 6865 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 6866 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) { 6867 W.startLine() << "The .MIPS.abiflags section has a wrong size.\n"; 6868 return; 6869 } 6870 6871 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 6872 6873 raw_ostream &OS = W.getOStream(); 6874 DictScope GS(W, "MIPS ABI Flags"); 6875 6876 W.printNumber("Version", Flags->version); 6877 W.startLine() << "ISA: "; 6878 if (Flags->isa_rev <= 1) 6879 OS << format("MIPS%u", Flags->isa_level); 6880 else 6881 OS << format("MIPS%ur%u", Flags->isa_level, Flags->isa_rev); 6882 OS << "\n"; 6883 W.printEnum("ISA Extension", Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)); 6884 W.printFlags("ASEs", Flags->ases, makeArrayRef(ElfMipsASEFlags)); 6885 W.printEnum("FP ABI", Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)); 6886 W.printNumber("GPR size", getMipsRegisterSize(Flags->gpr_size)); 6887 W.printNumber("CPR1 size", getMipsRegisterSize(Flags->cpr1_size)); 6888 W.printNumber("CPR2 size", getMipsRegisterSize(Flags->cpr2_size)); 6889 W.printFlags("Flags 1", Flags->flags1, makeArrayRef(ElfMipsFlags1)); 6890 W.printHex("Flags 2", Flags->flags2); 6891 } 6892