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