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 if (DynamicStringTable.empty() && !DynamicStringTable.data()) { 2562 reportUniqueWarning(createError("string table was not found")); 2563 return "<?>"; 2564 } 2565 2566 auto WarnAndReturn = [this](const Twine &Msg, uint64_t Offset) { 2567 reportUniqueWarning(createError("string table at offset 0x" + 2568 Twine::utohexstr(Offset) + Msg)); 2569 return "<?>"; 2570 }; 2571 2572 const uint64_t FileSize = ObjF->getELFFile()->getBufSize(); 2573 const uint64_t Offset = 2574 (const uint8_t *)DynamicStringTable.data() - ObjF->getELFFile()->base(); 2575 if (DynamicStringTable.size() > FileSize - Offset) 2576 return WarnAndReturn(" with size 0x" + 2577 Twine::utohexstr(DynamicStringTable.size()) + 2578 " goes past the end of the file (0x" + 2579 Twine::utohexstr(FileSize) + ")", 2580 Offset); 2581 2582 if (Value >= DynamicStringTable.size()) 2583 return WarnAndReturn( 2584 ": unable to read the string at 0x" + Twine::utohexstr(Offset + Value) + 2585 ": it goes past the end of the table (0x" + 2586 Twine::utohexstr(Offset + DynamicStringTable.size()) + ")", 2587 Offset); 2588 2589 if (DynamicStringTable.back() != '\0') 2590 return WarnAndReturn(": unable to read the string at 0x" + 2591 Twine::utohexstr(Offset + Value) + 2592 ": the string table is not null-terminated", 2593 Offset); 2594 2595 return DynamicStringTable.data() + Value; 2596 } 2597 2598 template <class ELFT> void ELFDumper<ELFT>::printUnwindInfo() { 2599 DwarfCFIEH::PrinterContext<ELFT> Ctx(W, ObjF); 2600 Ctx.printUnwindInformation(); 2601 } 2602 2603 namespace { 2604 2605 template <> void ELFDumper<ELF32LE>::printUnwindInfo() { 2606 const ELFFile<ELF32LE> *Obj = ObjF->getELFFile(); 2607 const unsigned Machine = Obj->getHeader()->e_machine; 2608 if (Machine == EM_ARM) { 2609 ARM::EHABI::PrinterContext<ELF32LE> Ctx(W, Obj, ObjF->getFileName(), 2610 DotSymtabSec); 2611 Ctx.PrintUnwindInformation(); 2612 } 2613 DwarfCFIEH::PrinterContext<ELF32LE> Ctx(W, ObjF); 2614 Ctx.printUnwindInformation(); 2615 } 2616 2617 } // end anonymous namespace 2618 2619 template <class ELFT> void ELFDumper<ELFT>::printDynamicTable() { 2620 ELFDumperStyle->printDynamic(ObjF->getELFFile()); 2621 } 2622 2623 template <class ELFT> void ELFDumper<ELFT>::printNeededLibraries() { 2624 ListScope D(W, "NeededLibraries"); 2625 2626 std::vector<StringRef> Libs; 2627 for (const auto &Entry : dynamic_table()) 2628 if (Entry.d_tag == ELF::DT_NEEDED) 2629 Libs.push_back(getDynamicString(Entry.d_un.d_val)); 2630 2631 llvm::sort(Libs); 2632 2633 for (StringRef L : Libs) 2634 W.startLine() << L << "\n"; 2635 } 2636 2637 template <class ELFT> 2638 static bool checkHashTable(const ELFFile<ELFT> *Obj, 2639 const typename ELFT::Hash *H, StringRef FileName) { 2640 auto WarnAndReturn = [&](uint64_t Off, const Twine &Msg = "") { 2641 reportWarning(createError("the hash table at offset 0x" + 2642 Twine::utohexstr(Off) + 2643 " goes past the end of the file (0x" + 2644 Twine::utohexstr(Obj->getBufSize()) + ")" + Msg), 2645 FileName); 2646 return false; 2647 }; 2648 2649 // Each SHT_HASH section starts from two 32-bit fields: nbucket and nchain. 2650 const unsigned HeaderSize = 2 * sizeof(typename ELFT::Word); 2651 const uint64_t SecOffset = (const uint8_t *)H - Obj->base(); 2652 if (Obj->getBufSize() - SecOffset < HeaderSize) 2653 return WarnAndReturn(SecOffset); 2654 2655 if (Obj->getBufSize() - SecOffset - HeaderSize < 2656 ((uint64_t)H->nbucket + H->nchain) * sizeof(typename ELFT::Word)) 2657 return WarnAndReturn(SecOffset, ", nbucket = " + Twine(H->nbucket) + 2658 ", nchain = " + Twine(H->nchain)); 2659 return true; 2660 } 2661 2662 template <typename ELFT> void ELFDumper<ELFT>::printHashTable() { 2663 DictScope D(W, "HashTable"); 2664 if (!HashTable || 2665 !checkHashTable(ObjF->getELFFile(), HashTable, ObjF->getFileName())) 2666 return; 2667 W.printNumber("Num Buckets", HashTable->nbucket); 2668 W.printNumber("Num Chains", HashTable->nchain); 2669 W.printList("Buckets", HashTable->buckets()); 2670 W.printList("Chains", HashTable->chains()); 2671 } 2672 2673 template <typename ELFT> void ELFDumper<ELFT>::printGnuHashTable() { 2674 DictScope D(W, "GnuHashTable"); 2675 if (!GnuHashTable) 2676 return; 2677 W.printNumber("Num Buckets", GnuHashTable->nbuckets); 2678 W.printNumber("First Hashed Symbol Index", GnuHashTable->symndx); 2679 W.printNumber("Num Mask Words", GnuHashTable->maskwords); 2680 W.printNumber("Shift Count", GnuHashTable->shift2); 2681 2682 ArrayRef<typename ELFT::Off> BloomFilter = GnuHashTable->filter(); 2683 W.printHexList("Bloom Filter", BloomFilter); 2684 2685 ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets(); 2686 W.printList("Buckets", Buckets); 2687 2688 if (!DynSymRegion) { 2689 reportWarning(createError("unable to dump 'Values' for the SHT_GNU_HASH " 2690 "section: no dynamic symbol table found"), 2691 ObjF->getFileName()); 2692 return; 2693 } 2694 2695 size_t NumSyms = dynamic_symbols().size(); 2696 if (!NumSyms) { 2697 reportWarning(createError("unable to dump 'Values' for the SHT_GNU_HASH " 2698 "section: the dynamic symbol table is empty"), 2699 ObjF->getFileName()); 2700 return; 2701 } 2702 2703 if (GnuHashTable->symndx >= NumSyms) { 2704 // A normal empty GNU hash table section produced by linker might have 2705 // symndx set to the number of dynamic symbols + 1 (for the zero symbol) 2706 // and have dummy null values in the Bloom filter and in the buckets 2707 // vector. It happens because the value of symndx is not important for 2708 // dynamic loaders when the GNU hash table is empty. They just skip the 2709 // whole object during symbol lookup. In such cases, the symndx value is 2710 // irrelevant and we should not report a warning. 2711 bool IsEmptyHashTable = 2712 llvm::all_of(Buckets, [](Elf_Word V) { return V == 0; }); 2713 2714 if (!IsEmptyHashTable) { 2715 reportWarning( 2716 createError("the first hashed symbol index (" + 2717 Twine(GnuHashTable->symndx) + 2718 ") is larger than the number of dynamic symbols (" + 2719 Twine(NumSyms) + ")"), 2720 ObjF->getFileName()); 2721 return; 2722 } 2723 } 2724 2725 W.printHexList("Values", GnuHashTable->values(NumSyms)); 2726 } 2727 2728 template <typename ELFT> void ELFDumper<ELFT>::printLoadName() { 2729 W.printString("LoadName", SOName); 2730 } 2731 2732 template <class ELFT> void ELFDumper<ELFT>::printArchSpecificInfo() { 2733 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2734 switch (Obj->getHeader()->e_machine) { 2735 case EM_ARM: 2736 case EM_RISCV: 2737 printAttributes(); 2738 break; 2739 case EM_MIPS: { 2740 ELFDumperStyle->printMipsABIFlags(ObjF); 2741 printMipsOptions(); 2742 printMipsReginfo(); 2743 2744 MipsGOTParser<ELFT> Parser(Obj, ObjF->getFileName(), dynamic_table(), 2745 dynamic_symbols()); 2746 if (Parser.hasGot()) 2747 ELFDumperStyle->printMipsGOT(Parser); 2748 if (Parser.hasPlt()) 2749 ELFDumperStyle->printMipsPLT(Parser); 2750 break; 2751 } 2752 default: 2753 break; 2754 } 2755 } 2756 2757 namespace { 2758 2759 template <class ELFT> void ELFDumper<ELFT>::printAttributes() { 2760 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 2761 if (!Obj->isLE()) { 2762 W.startLine() << "Attributes not implemented.\n"; 2763 return; 2764 } 2765 2766 const unsigned Machine = Obj->getHeader()->e_machine; 2767 assert((Machine == EM_ARM || Machine == EM_RISCV) && 2768 "Attributes not implemented."); 2769 2770 DictScope BA(W, "BuildAttributes"); 2771 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 2772 if (Sec.sh_type != ELF::SHT_ARM_ATTRIBUTES && 2773 Sec.sh_type != ELF::SHT_RISCV_ATTRIBUTES) 2774 continue; 2775 2776 ArrayRef<uint8_t> Contents = 2777 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(&Sec)); 2778 if (Contents[0] != ELFAttrs::Format_Version) { 2779 reportWarning(createError(Twine("unrecognised FormatVersion: 0x") + 2780 Twine::utohexstr(Contents[0])), 2781 ObjF->getFileName()); 2782 continue; 2783 } 2784 W.printHex("FormatVersion", Contents[0]); 2785 if (Contents.size() == 1) 2786 continue; 2787 2788 // TODO: Delete the redundant FormatVersion check above. 2789 if (Machine == EM_ARM) { 2790 if (Error E = ARMAttributeParser(&W).parse(Contents, support::little)) 2791 reportWarning(std::move(E), ObjF->getFileName()); 2792 } else if (Machine == EM_RISCV) { 2793 if (Error E = RISCVAttributeParser(&W).parse(Contents, support::little)) 2794 reportWarning(std::move(E), ObjF->getFileName()); 2795 } 2796 } 2797 } 2798 2799 template <class ELFT> class MipsGOTParser { 2800 public: 2801 TYPEDEF_ELF_TYPES(ELFT) 2802 using Entry = typename ELFO::Elf_Addr; 2803 using Entries = ArrayRef<Entry>; 2804 2805 const bool IsStatic; 2806 const ELFO * const Obj; 2807 2808 MipsGOTParser(const ELFO *Obj, StringRef FileName, Elf_Dyn_Range DynTable, 2809 Elf_Sym_Range DynSyms); 2810 2811 bool hasGot() const { return !GotEntries.empty(); } 2812 bool hasPlt() const { return !PltEntries.empty(); } 2813 2814 uint64_t getGp() const; 2815 2816 const Entry *getGotLazyResolver() const; 2817 const Entry *getGotModulePointer() const; 2818 const Entry *getPltLazyResolver() const; 2819 const Entry *getPltModulePointer() const; 2820 2821 Entries getLocalEntries() const; 2822 Entries getGlobalEntries() const; 2823 Entries getOtherEntries() const; 2824 Entries getPltEntries() const; 2825 2826 uint64_t getGotAddress(const Entry * E) const; 2827 int64_t getGotOffset(const Entry * E) const; 2828 const Elf_Sym *getGotSym(const Entry *E) const; 2829 2830 uint64_t getPltAddress(const Entry * E) const; 2831 const Elf_Sym *getPltSym(const Entry *E) const; 2832 2833 StringRef getPltStrTable() const { return PltStrTable; } 2834 2835 private: 2836 const Elf_Shdr *GotSec; 2837 size_t LocalNum; 2838 size_t GlobalNum; 2839 2840 const Elf_Shdr *PltSec; 2841 const Elf_Shdr *PltRelSec; 2842 const Elf_Shdr *PltSymTable; 2843 StringRef FileName; 2844 2845 Elf_Sym_Range GotDynSyms; 2846 StringRef PltStrTable; 2847 2848 Entries GotEntries; 2849 Entries PltEntries; 2850 }; 2851 2852 } // end anonymous namespace 2853 2854 template <class ELFT> 2855 MipsGOTParser<ELFT>::MipsGOTParser(const ELFO *Obj, StringRef FileName, 2856 Elf_Dyn_Range DynTable, 2857 Elf_Sym_Range DynSyms) 2858 : IsStatic(DynTable.empty()), Obj(Obj), GotSec(nullptr), LocalNum(0), 2859 GlobalNum(0), PltSec(nullptr), PltRelSec(nullptr), PltSymTable(nullptr), 2860 FileName(FileName) { 2861 // See "Global Offset Table" in Chapter 5 in the following document 2862 // for detailed GOT description. 2863 // ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf 2864 2865 // Find static GOT secton. 2866 if (IsStatic) { 2867 GotSec = findSectionByName(*Obj, FileName, ".got"); 2868 if (!GotSec) 2869 return; 2870 2871 ArrayRef<uint8_t> Content = 2872 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 2873 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2874 Content.size() / sizeof(Entry)); 2875 LocalNum = GotEntries.size(); 2876 return; 2877 } 2878 2879 // Lookup dynamic table tags which define GOT/PLT layouts. 2880 Optional<uint64_t> DtPltGot; 2881 Optional<uint64_t> DtLocalGotNum; 2882 Optional<uint64_t> DtGotSym; 2883 Optional<uint64_t> DtMipsPltGot; 2884 Optional<uint64_t> DtJmpRel; 2885 for (const auto &Entry : DynTable) { 2886 switch (Entry.getTag()) { 2887 case ELF::DT_PLTGOT: 2888 DtPltGot = Entry.getVal(); 2889 break; 2890 case ELF::DT_MIPS_LOCAL_GOTNO: 2891 DtLocalGotNum = Entry.getVal(); 2892 break; 2893 case ELF::DT_MIPS_GOTSYM: 2894 DtGotSym = Entry.getVal(); 2895 break; 2896 case ELF::DT_MIPS_PLTGOT: 2897 DtMipsPltGot = Entry.getVal(); 2898 break; 2899 case ELF::DT_JMPREL: 2900 DtJmpRel = Entry.getVal(); 2901 break; 2902 } 2903 } 2904 2905 // Find dynamic GOT section. 2906 if (DtPltGot || DtLocalGotNum || DtGotSym) { 2907 if (!DtPltGot) 2908 report_fatal_error("Cannot find PLTGOT dynamic table tag."); 2909 if (!DtLocalGotNum) 2910 report_fatal_error("Cannot find MIPS_LOCAL_GOTNO dynamic table tag."); 2911 if (!DtGotSym) 2912 report_fatal_error("Cannot find MIPS_GOTSYM dynamic table tag."); 2913 2914 size_t DynSymTotal = DynSyms.size(); 2915 if (*DtGotSym > DynSymTotal) 2916 reportError( 2917 createError("MIPS_GOTSYM exceeds a number of dynamic symbols"), 2918 FileName); 2919 2920 GotSec = findNotEmptySectionByAddress(Obj, FileName, *DtPltGot); 2921 if (!GotSec) 2922 reportError(createError("There is no not empty GOT section at 0x" + 2923 Twine::utohexstr(*DtPltGot)), 2924 FileName); 2925 2926 LocalNum = *DtLocalGotNum; 2927 GlobalNum = DynSymTotal - *DtGotSym; 2928 2929 ArrayRef<uint8_t> Content = 2930 unwrapOrError(FileName, Obj->getSectionContents(GotSec)); 2931 GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()), 2932 Content.size() / sizeof(Entry)); 2933 GotDynSyms = DynSyms.drop_front(*DtGotSym); 2934 } 2935 2936 // Find PLT section. 2937 if (DtMipsPltGot || DtJmpRel) { 2938 if (!DtMipsPltGot) 2939 report_fatal_error("Cannot find MIPS_PLTGOT dynamic table tag."); 2940 if (!DtJmpRel) 2941 report_fatal_error("Cannot find JMPREL dynamic table tag."); 2942 2943 PltSec = findNotEmptySectionByAddress(Obj, FileName, * DtMipsPltGot); 2944 if (!PltSec) 2945 report_fatal_error("There is no not empty PLTGOT section at 0x " + 2946 Twine::utohexstr(*DtMipsPltGot)); 2947 2948 PltRelSec = findNotEmptySectionByAddress(Obj, FileName, * DtJmpRel); 2949 if (!PltRelSec) 2950 report_fatal_error("There is no not empty RELPLT section at 0x" + 2951 Twine::utohexstr(*DtJmpRel)); 2952 2953 ArrayRef<uint8_t> PltContent = 2954 unwrapOrError(FileName, Obj->getSectionContents(PltSec)); 2955 PltEntries = Entries(reinterpret_cast<const Entry *>(PltContent.data()), 2956 PltContent.size() / sizeof(Entry)); 2957 2958 PltSymTable = unwrapOrError(FileName, Obj->getSection(PltRelSec->sh_link)); 2959 PltStrTable = 2960 unwrapOrError(FileName, Obj->getStringTableForSymtab(*PltSymTable)); 2961 } 2962 } 2963 2964 template <class ELFT> uint64_t MipsGOTParser<ELFT>::getGp() const { 2965 return GotSec->sh_addr + 0x7ff0; 2966 } 2967 2968 template <class ELFT> 2969 const typename MipsGOTParser<ELFT>::Entry * 2970 MipsGOTParser<ELFT>::getGotLazyResolver() const { 2971 return LocalNum > 0 ? &GotEntries[0] : nullptr; 2972 } 2973 2974 template <class ELFT> 2975 const typename MipsGOTParser<ELFT>::Entry * 2976 MipsGOTParser<ELFT>::getGotModulePointer() const { 2977 if (LocalNum < 2) 2978 return nullptr; 2979 const Entry &E = GotEntries[1]; 2980 if ((E >> (sizeof(Entry) * 8 - 1)) == 0) 2981 return nullptr; 2982 return &E; 2983 } 2984 2985 template <class ELFT> 2986 typename MipsGOTParser<ELFT>::Entries 2987 MipsGOTParser<ELFT>::getLocalEntries() const { 2988 size_t Skip = getGotModulePointer() ? 2 : 1; 2989 if (LocalNum - Skip <= 0) 2990 return Entries(); 2991 return GotEntries.slice(Skip, LocalNum - Skip); 2992 } 2993 2994 template <class ELFT> 2995 typename MipsGOTParser<ELFT>::Entries 2996 MipsGOTParser<ELFT>::getGlobalEntries() const { 2997 if (GlobalNum == 0) 2998 return Entries(); 2999 return GotEntries.slice(LocalNum, GlobalNum); 3000 } 3001 3002 template <class ELFT> 3003 typename MipsGOTParser<ELFT>::Entries 3004 MipsGOTParser<ELFT>::getOtherEntries() const { 3005 size_t OtherNum = GotEntries.size() - LocalNum - GlobalNum; 3006 if (OtherNum == 0) 3007 return Entries(); 3008 return GotEntries.slice(LocalNum + GlobalNum, OtherNum); 3009 } 3010 3011 template <class ELFT> 3012 uint64_t MipsGOTParser<ELFT>::getGotAddress(const Entry *E) const { 3013 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3014 return GotSec->sh_addr + Offset; 3015 } 3016 3017 template <class ELFT> 3018 int64_t MipsGOTParser<ELFT>::getGotOffset(const Entry *E) const { 3019 int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry); 3020 return Offset - 0x7ff0; 3021 } 3022 3023 template <class ELFT> 3024 const typename MipsGOTParser<ELFT>::Elf_Sym * 3025 MipsGOTParser<ELFT>::getGotSym(const Entry *E) const { 3026 int64_t Offset = std::distance(GotEntries.data(), E); 3027 return &GotDynSyms[Offset - LocalNum]; 3028 } 3029 3030 template <class ELFT> 3031 const typename MipsGOTParser<ELFT>::Entry * 3032 MipsGOTParser<ELFT>::getPltLazyResolver() const { 3033 return PltEntries.empty() ? nullptr : &PltEntries[0]; 3034 } 3035 3036 template <class ELFT> 3037 const typename MipsGOTParser<ELFT>::Entry * 3038 MipsGOTParser<ELFT>::getPltModulePointer() const { 3039 return PltEntries.size() < 2 ? nullptr : &PltEntries[1]; 3040 } 3041 3042 template <class ELFT> 3043 typename MipsGOTParser<ELFT>::Entries 3044 MipsGOTParser<ELFT>::getPltEntries() const { 3045 if (PltEntries.size() <= 2) 3046 return Entries(); 3047 return PltEntries.slice(2, PltEntries.size() - 2); 3048 } 3049 3050 template <class ELFT> 3051 uint64_t MipsGOTParser<ELFT>::getPltAddress(const Entry *E) const { 3052 int64_t Offset = std::distance(PltEntries.data(), E) * sizeof(Entry); 3053 return PltSec->sh_addr + Offset; 3054 } 3055 3056 template <class ELFT> 3057 const typename MipsGOTParser<ELFT>::Elf_Sym * 3058 MipsGOTParser<ELFT>::getPltSym(const Entry *E) const { 3059 int64_t Offset = std::distance(getPltEntries().data(), E); 3060 if (PltRelSec->sh_type == ELF::SHT_REL) { 3061 Elf_Rel_Range Rels = unwrapOrError(FileName, Obj->rels(PltRelSec)); 3062 return unwrapOrError(FileName, 3063 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3064 } else { 3065 Elf_Rela_Range Rels = unwrapOrError(FileName, Obj->relas(PltRelSec)); 3066 return unwrapOrError(FileName, 3067 Obj->getRelocationSymbol(&Rels[Offset], PltSymTable)); 3068 } 3069 } 3070 3071 static const EnumEntry<unsigned> ElfMipsISAExtType[] = { 3072 {"None", Mips::AFL_EXT_NONE}, 3073 {"Broadcom SB-1", Mips::AFL_EXT_SB1}, 3074 {"Cavium Networks Octeon", Mips::AFL_EXT_OCTEON}, 3075 {"Cavium Networks Octeon2", Mips::AFL_EXT_OCTEON2}, 3076 {"Cavium Networks OcteonP", Mips::AFL_EXT_OCTEONP}, 3077 {"Cavium Networks Octeon3", Mips::AFL_EXT_OCTEON3}, 3078 {"LSI R4010", Mips::AFL_EXT_4010}, 3079 {"Loongson 2E", Mips::AFL_EXT_LOONGSON_2E}, 3080 {"Loongson 2F", Mips::AFL_EXT_LOONGSON_2F}, 3081 {"Loongson 3A", Mips::AFL_EXT_LOONGSON_3A}, 3082 {"MIPS R4650", Mips::AFL_EXT_4650}, 3083 {"MIPS R5900", Mips::AFL_EXT_5900}, 3084 {"MIPS R10000", Mips::AFL_EXT_10000}, 3085 {"NEC VR4100", Mips::AFL_EXT_4100}, 3086 {"NEC VR4111/VR4181", Mips::AFL_EXT_4111}, 3087 {"NEC VR4120", Mips::AFL_EXT_4120}, 3088 {"NEC VR5400", Mips::AFL_EXT_5400}, 3089 {"NEC VR5500", Mips::AFL_EXT_5500}, 3090 {"RMI Xlr", Mips::AFL_EXT_XLR}, 3091 {"Toshiba R3900", Mips::AFL_EXT_3900} 3092 }; 3093 3094 static const EnumEntry<unsigned> ElfMipsASEFlags[] = { 3095 {"DSP", Mips::AFL_ASE_DSP}, 3096 {"DSPR2", Mips::AFL_ASE_DSPR2}, 3097 {"Enhanced VA Scheme", Mips::AFL_ASE_EVA}, 3098 {"MCU", Mips::AFL_ASE_MCU}, 3099 {"MDMX", Mips::AFL_ASE_MDMX}, 3100 {"MIPS-3D", Mips::AFL_ASE_MIPS3D}, 3101 {"MT", Mips::AFL_ASE_MT}, 3102 {"SmartMIPS", Mips::AFL_ASE_SMARTMIPS}, 3103 {"VZ", Mips::AFL_ASE_VIRT}, 3104 {"MSA", Mips::AFL_ASE_MSA}, 3105 {"MIPS16", Mips::AFL_ASE_MIPS16}, 3106 {"microMIPS", Mips::AFL_ASE_MICROMIPS}, 3107 {"XPA", Mips::AFL_ASE_XPA}, 3108 {"CRC", Mips::AFL_ASE_CRC}, 3109 {"GINV", Mips::AFL_ASE_GINV}, 3110 }; 3111 3112 static const EnumEntry<unsigned> ElfMipsFpABIType[] = { 3113 {"Hard or soft float", Mips::Val_GNU_MIPS_ABI_FP_ANY}, 3114 {"Hard float (double precision)", Mips::Val_GNU_MIPS_ABI_FP_DOUBLE}, 3115 {"Hard float (single precision)", Mips::Val_GNU_MIPS_ABI_FP_SINGLE}, 3116 {"Soft float", Mips::Val_GNU_MIPS_ABI_FP_SOFT}, 3117 {"Hard float (MIPS32r2 64-bit FPU 12 callee-saved)", 3118 Mips::Val_GNU_MIPS_ABI_FP_OLD_64}, 3119 {"Hard float (32-bit CPU, Any FPU)", Mips::Val_GNU_MIPS_ABI_FP_XX}, 3120 {"Hard float (32-bit CPU, 64-bit FPU)", Mips::Val_GNU_MIPS_ABI_FP_64}, 3121 {"Hard float compat (32-bit CPU, 64-bit FPU)", 3122 Mips::Val_GNU_MIPS_ABI_FP_64A} 3123 }; 3124 3125 static const EnumEntry<unsigned> ElfMipsFlags1[] { 3126 {"ODDSPREG", Mips::AFL_FLAGS1_ODDSPREG}, 3127 }; 3128 3129 static int getMipsRegisterSize(uint8_t Flag) { 3130 switch (Flag) { 3131 case Mips::AFL_REG_NONE: 3132 return 0; 3133 case Mips::AFL_REG_32: 3134 return 32; 3135 case Mips::AFL_REG_64: 3136 return 64; 3137 case Mips::AFL_REG_128: 3138 return 128; 3139 default: 3140 return -1; 3141 } 3142 } 3143 3144 template <class ELFT> 3145 static void printMipsReginfoData(ScopedPrinter &W, 3146 const Elf_Mips_RegInfo<ELFT> &Reginfo) { 3147 W.printHex("GP", Reginfo.ri_gp_value); 3148 W.printHex("General Mask", Reginfo.ri_gprmask); 3149 W.printHex("Co-Proc Mask0", Reginfo.ri_cprmask[0]); 3150 W.printHex("Co-Proc Mask1", Reginfo.ri_cprmask[1]); 3151 W.printHex("Co-Proc Mask2", Reginfo.ri_cprmask[2]); 3152 W.printHex("Co-Proc Mask3", Reginfo.ri_cprmask[3]); 3153 } 3154 3155 template <class ELFT> void ELFDumper<ELFT>::printMipsReginfo() { 3156 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3157 const Elf_Shdr *Shdr = findSectionByName(*Obj, ObjF->getFileName(), ".reginfo"); 3158 if (!Shdr) { 3159 W.startLine() << "There is no .reginfo section in the file.\n"; 3160 return; 3161 } 3162 ArrayRef<uint8_t> Sec = 3163 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3164 if (Sec.size() != sizeof(Elf_Mips_RegInfo<ELFT>)) { 3165 W.startLine() << "The .reginfo section has a wrong size.\n"; 3166 return; 3167 } 3168 3169 DictScope GS(W, "MIPS RegInfo"); 3170 auto *Reginfo = reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(Sec.data()); 3171 printMipsReginfoData(W, *Reginfo); 3172 } 3173 3174 template <class ELFT> void ELFDumper<ELFT>::printMipsOptions() { 3175 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3176 const Elf_Shdr *Shdr = 3177 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.options"); 3178 if (!Shdr) { 3179 W.startLine() << "There is no .MIPS.options section in the file.\n"; 3180 return; 3181 } 3182 3183 DictScope GS(W, "MIPS Options"); 3184 3185 ArrayRef<uint8_t> Sec = 3186 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 3187 while (!Sec.empty()) { 3188 if (Sec.size() < sizeof(Elf_Mips_Options<ELFT>)) { 3189 W.startLine() << "The .MIPS.options section has a wrong size.\n"; 3190 return; 3191 } 3192 auto *O = reinterpret_cast<const Elf_Mips_Options<ELFT> *>(Sec.data()); 3193 DictScope GS(W, getElfMipsOptionsOdkType(O->kind)); 3194 switch (O->kind) { 3195 case ODK_REGINFO: 3196 printMipsReginfoData(W, O->getRegInfo()); 3197 break; 3198 default: 3199 W.startLine() << "Unsupported MIPS options tag.\n"; 3200 break; 3201 } 3202 Sec = Sec.slice(O->size); 3203 } 3204 } 3205 3206 template <class ELFT> void ELFDumper<ELFT>::printStackMap() const { 3207 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 3208 const Elf_Shdr *StackMapSection = nullptr; 3209 for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) { 3210 StringRef Name = 3211 unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec)); 3212 if (Name == ".llvm_stackmaps") { 3213 StackMapSection = &Sec; 3214 break; 3215 } 3216 } 3217 3218 if (!StackMapSection) 3219 return; 3220 3221 ArrayRef<uint8_t> StackMapContentsArray = unwrapOrError( 3222 ObjF->getFileName(), Obj->getSectionContents(StackMapSection)); 3223 3224 prettyPrintStackMap( 3225 W, StackMapParser<ELFT::TargetEndianness>(StackMapContentsArray)); 3226 } 3227 3228 template <class ELFT> void ELFDumper<ELFT>::printGroupSections() { 3229 ELFDumperStyle->printGroupSections(ObjF->getELFFile()); 3230 } 3231 3232 template <class ELFT> void ELFDumper<ELFT>::printAddrsig() { 3233 ELFDumperStyle->printAddrsig(ObjF->getELFFile()); 3234 } 3235 3236 static inline void printFields(formatted_raw_ostream &OS, StringRef Str1, 3237 StringRef Str2) { 3238 OS.PadToColumn(2u); 3239 OS << Str1; 3240 OS.PadToColumn(37u); 3241 OS << Str2 << "\n"; 3242 OS.flush(); 3243 } 3244 3245 template <class ELFT> 3246 static std::string getSectionHeadersNumString(const ELFFile<ELFT> *Obj, 3247 StringRef FileName) { 3248 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3249 if (ElfHeader->e_shnum != 0) 3250 return to_string(ElfHeader->e_shnum); 3251 3252 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3253 if (Arr.empty()) 3254 return "0"; 3255 return "0 (" + to_string(Arr[0].sh_size) + ")"; 3256 } 3257 3258 template <class ELFT> 3259 static std::string getSectionHeaderTableIndexString(const ELFFile<ELFT> *Obj, 3260 StringRef FileName) { 3261 const typename ELFT::Ehdr *ElfHeader = Obj->getHeader(); 3262 if (ElfHeader->e_shstrndx != SHN_XINDEX) 3263 return to_string(ElfHeader->e_shstrndx); 3264 3265 ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections()); 3266 if (Arr.empty()) 3267 return "65535 (corrupt: out of range)"; 3268 return to_string(ElfHeader->e_shstrndx) + " (" + to_string(Arr[0].sh_link) + 3269 ")"; 3270 } 3271 3272 template <class ELFT> void GNUStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 3273 const Elf_Ehdr *e = Obj->getHeader(); 3274 OS << "ELF Header:\n"; 3275 OS << " Magic: "; 3276 std::string Str; 3277 for (int i = 0; i < ELF::EI_NIDENT; i++) 3278 OS << format(" %02x", static_cast<int>(e->e_ident[i])); 3279 OS << "\n"; 3280 Str = printEnum(e->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 3281 printFields(OS, "Class:", Str); 3282 Str = printEnum(e->e_ident[ELF::EI_DATA], makeArrayRef(ElfDataEncoding)); 3283 printFields(OS, "Data:", Str); 3284 OS.PadToColumn(2u); 3285 OS << "Version:"; 3286 OS.PadToColumn(37u); 3287 OS << to_hexString(e->e_ident[ELF::EI_VERSION]); 3288 if (e->e_version == ELF::EV_CURRENT) 3289 OS << " (current)"; 3290 OS << "\n"; 3291 Str = printEnum(e->e_ident[ELF::EI_OSABI], makeArrayRef(ElfOSABI)); 3292 printFields(OS, "OS/ABI:", Str); 3293 printFields(OS, 3294 "ABI Version:", std::to_string(e->e_ident[ELF::EI_ABIVERSION])); 3295 Str = printEnum(e->e_type, makeArrayRef(ElfObjectFileType)); 3296 printFields(OS, "Type:", Str); 3297 Str = printEnum(e->e_machine, makeArrayRef(ElfMachineType)); 3298 printFields(OS, "Machine:", Str); 3299 Str = "0x" + to_hexString(e->e_version); 3300 printFields(OS, "Version:", Str); 3301 Str = "0x" + to_hexString(e->e_entry); 3302 printFields(OS, "Entry point address:", Str); 3303 Str = to_string(e->e_phoff) + " (bytes into file)"; 3304 printFields(OS, "Start of program headers:", Str); 3305 Str = to_string(e->e_shoff) + " (bytes into file)"; 3306 printFields(OS, "Start of section headers:", Str); 3307 std::string ElfFlags; 3308 if (e->e_machine == EM_MIPS) 3309 ElfFlags = 3310 printFlags(e->e_flags, makeArrayRef(ElfHeaderMipsFlags), 3311 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 3312 unsigned(ELF::EF_MIPS_MACH)); 3313 else if (e->e_machine == EM_RISCV) 3314 ElfFlags = printFlags(e->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 3315 Str = "0x" + to_hexString(e->e_flags); 3316 if (!ElfFlags.empty()) 3317 Str = Str + ", " + ElfFlags; 3318 printFields(OS, "Flags:", Str); 3319 Str = to_string(e->e_ehsize) + " (bytes)"; 3320 printFields(OS, "Size of this header:", Str); 3321 Str = to_string(e->e_phentsize) + " (bytes)"; 3322 printFields(OS, "Size of program headers:", Str); 3323 Str = to_string(e->e_phnum); 3324 printFields(OS, "Number of program headers:", Str); 3325 Str = to_string(e->e_shentsize) + " (bytes)"; 3326 printFields(OS, "Size of section headers:", Str); 3327 Str = getSectionHeadersNumString(Obj, this->FileName); 3328 printFields(OS, "Number of section headers:", Str); 3329 Str = getSectionHeaderTableIndexString(Obj, this->FileName); 3330 printFields(OS, "Section header string table index:", Str); 3331 } 3332 3333 namespace { 3334 struct GroupMember { 3335 StringRef Name; 3336 uint64_t Index; 3337 }; 3338 3339 struct GroupSection { 3340 StringRef Name; 3341 std::string Signature; 3342 uint64_t ShName; 3343 uint64_t Index; 3344 uint32_t Link; 3345 uint32_t Info; 3346 uint32_t Type; 3347 std::vector<GroupMember> Members; 3348 }; 3349 3350 template <class ELFT> 3351 std::vector<GroupSection> getGroups(const ELFFile<ELFT> *Obj, 3352 StringRef FileName) { 3353 using Elf_Shdr = typename ELFT::Shdr; 3354 using Elf_Sym = typename ELFT::Sym; 3355 using Elf_Word = typename ELFT::Word; 3356 3357 std::vector<GroupSection> Ret; 3358 uint64_t I = 0; 3359 for (const Elf_Shdr &Sec : unwrapOrError(FileName, Obj->sections())) { 3360 ++I; 3361 if (Sec.sh_type != ELF::SHT_GROUP) 3362 continue; 3363 3364 const Elf_Shdr *Symtab = 3365 unwrapOrError(FileName, Obj->getSection(Sec.sh_link)); 3366 StringRef StrTable = 3367 unwrapOrError(FileName, Obj->getStringTableForSymtab(*Symtab)); 3368 const Elf_Sym *Sym = unwrapOrError( 3369 FileName, Obj->template getEntry<Elf_Sym>(Symtab, Sec.sh_info)); 3370 auto Data = unwrapOrError( 3371 FileName, Obj->template getSectionContentsAsArray<Elf_Word>(&Sec)); 3372 3373 StringRef Name = unwrapOrError(FileName, Obj->getSectionName(&Sec)); 3374 StringRef Signature = StrTable.data() + Sym->st_name; 3375 Ret.push_back({Name, 3376 maybeDemangle(Signature), 3377 Sec.sh_name, 3378 I - 1, 3379 Sec.sh_link, 3380 Sec.sh_info, 3381 Data[0], 3382 {}}); 3383 3384 std::vector<GroupMember> &GM = Ret.back().Members; 3385 for (uint32_t Ndx : Data.slice(1)) { 3386 auto Sec = unwrapOrError(FileName, Obj->getSection(Ndx)); 3387 const StringRef Name = unwrapOrError(FileName, Obj->getSectionName(Sec)); 3388 GM.push_back({Name, Ndx}); 3389 } 3390 } 3391 return Ret; 3392 } 3393 3394 DenseMap<uint64_t, const GroupSection *> 3395 mapSectionsToGroups(ArrayRef<GroupSection> Groups) { 3396 DenseMap<uint64_t, const GroupSection *> Ret; 3397 for (const GroupSection &G : Groups) 3398 for (const GroupMember &GM : G.Members) 3399 Ret.insert({GM.Index, &G}); 3400 return Ret; 3401 } 3402 3403 } // namespace 3404 3405 template <class ELFT> void GNUStyle<ELFT>::printGroupSections(const ELFO *Obj) { 3406 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 3407 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 3408 for (const GroupSection &G : V) { 3409 OS << "\n" 3410 << getGroupType(G.Type) << " group section [" 3411 << format_decimal(G.Index, 5) << "] `" << G.Name << "' [" << G.Signature 3412 << "] contains " << G.Members.size() << " sections:\n" 3413 << " [Index] Name\n"; 3414 for (const GroupMember &GM : G.Members) { 3415 const GroupSection *MainGroup = Map[GM.Index]; 3416 if (MainGroup != &G) { 3417 OS.flush(); 3418 errs() << "Error: section [" << format_decimal(GM.Index, 5) 3419 << "] in group section [" << format_decimal(G.Index, 5) 3420 << "] already in group section [" 3421 << format_decimal(MainGroup->Index, 5) << "]"; 3422 errs().flush(); 3423 continue; 3424 } 3425 OS << " [" << format_decimal(GM.Index, 5) << "] " << GM.Name << "\n"; 3426 } 3427 } 3428 3429 if (V.empty()) 3430 OS << "There are no section groups in this file.\n"; 3431 } 3432 3433 template <class ELFT> 3434 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 3435 const Elf_Shdr *SymTab, const Elf_Rela &R, 3436 unsigned RelIndex, bool IsRela) { 3437 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 3438 this->dumper()->getRelocationTarget(SymTab, R); 3439 if (!Target) 3440 this->reportUniqueWarning(createError( 3441 "unable to print relocation " + Twine(RelIndex) + " in section " + 3442 Twine(SecIndex) + ": " + toString(Target.takeError()))); 3443 else 3444 printRelocation(Obj, /*Sym=*/Target->first, /*Name=*/Target->second, R, 3445 IsRela); 3446 } 3447 3448 template <class ELFT> 3449 void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, const Elf_Sym *Sym, 3450 StringRef SymbolName, const Elf_Rela &R, 3451 bool IsRela) { 3452 // First two fields are bit width dependent. The rest of them are fixed width. 3453 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3454 Field Fields[5] = {0, 10 + Bias, 19 + 2 * Bias, 42 + 2 * Bias, 53 + 2 * Bias}; 3455 unsigned Width = ELFT::Is64Bits ? 16 : 8; 3456 3457 Fields[0].Str = to_string(format_hex_no_prefix(R.r_offset, Width)); 3458 Fields[1].Str = to_string(format_hex_no_prefix(R.r_info, Width)); 3459 3460 SmallString<32> RelocName; 3461 Obj->getRelocationTypeName(R.getType(Obj->isMips64EL()), RelocName); 3462 Fields[2].Str = RelocName.c_str(); 3463 3464 if (Sym && (!SymbolName.empty() || Sym->getValue() != 0)) 3465 Fields[3].Str = to_string(format_hex_no_prefix(Sym->getValue(), Width)); 3466 3467 Fields[4].Str = std::string(SymbolName); 3468 for (const Field &F : Fields) 3469 printField(F); 3470 3471 std::string Addend; 3472 if (IsRela) { 3473 int64_t RelAddend = R.r_addend; 3474 if (!SymbolName.empty()) { 3475 if (R.r_addend < 0) { 3476 Addend = " - "; 3477 RelAddend = std::abs(RelAddend); 3478 } else 3479 Addend = " + "; 3480 } 3481 3482 Addend += to_hexString(RelAddend, false); 3483 } 3484 OS << Addend << "\n"; 3485 } 3486 3487 template <class ELFT> void GNUStyle<ELFT>::printRelocHeader(unsigned SType) { 3488 bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA; 3489 bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR; 3490 if (ELFT::Is64Bits) 3491 OS << " "; 3492 else 3493 OS << " "; 3494 if (IsRelr && opts::RawRelr) 3495 OS << "Data "; 3496 else 3497 OS << "Offset"; 3498 if (ELFT::Is64Bits) 3499 OS << " Info Type" 3500 << " Symbol's Value Symbol's Name"; 3501 else 3502 OS << " Info Type Sym. Value Symbol's Name"; 3503 if (IsRela) 3504 OS << " + Addend"; 3505 OS << "\n"; 3506 } 3507 3508 template <class ELFT> void GNUStyle<ELFT>::printRelocations(const ELFO *Obj) { 3509 bool HasRelocSections = false; 3510 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 3511 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 3512 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 3513 Sec.sh_type != ELF::SHT_ANDROID_RELA && 3514 Sec.sh_type != ELF::SHT_ANDROID_RELR) 3515 continue; 3516 HasRelocSections = true; 3517 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 3518 unsigned Entries = Sec.getEntityCount(); 3519 std::vector<Elf_Rela> AndroidRelas; 3520 if (Sec.sh_type == ELF::SHT_ANDROID_REL || 3521 Sec.sh_type == ELF::SHT_ANDROID_RELA) { 3522 // Android's packed relocation section needs to be unpacked first 3523 // to get the actual number of entries. 3524 AndroidRelas = unwrapOrError(this->FileName, Obj->android_relas(&Sec)); 3525 Entries = AndroidRelas.size(); 3526 } 3527 std::vector<Elf_Rela> RelrRelas; 3528 if (!opts::RawRelr && (Sec.sh_type == ELF::SHT_RELR || 3529 Sec.sh_type == ELF::SHT_ANDROID_RELR)) { 3530 // .relr.dyn relative relocation section needs to be unpacked first 3531 // to get the actual number of entries. 3532 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(&Sec)); 3533 RelrRelas = unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 3534 Entries = RelrRelas.size(); 3535 } 3536 uintX_t Offset = Sec.sh_offset; 3537 OS << "\nRelocation section '" << Name << "' at offset 0x" 3538 << to_hexString(Offset, false) << " contains " << Entries 3539 << " entries:\n"; 3540 printRelocHeader(Sec.sh_type); 3541 const Elf_Shdr *SymTab = 3542 unwrapOrError(this->FileName, Obj->getSection(Sec.sh_link)); 3543 unsigned SecNdx = &Sec - &cantFail(Obj->sections()).front(); 3544 unsigned RelNdx = 0; 3545 3546 switch (Sec.sh_type) { 3547 case ELF::SHT_REL: 3548 for (const auto &R : unwrapOrError(this->FileName, Obj->rels(&Sec))) { 3549 Elf_Rela Rela; 3550 Rela.r_offset = R.r_offset; 3551 Rela.r_info = R.r_info; 3552 Rela.r_addend = 0; 3553 printRelocation(Obj, SecNdx, SymTab, Rela, ++RelNdx, false); 3554 } 3555 break; 3556 case ELF::SHT_RELA: 3557 for (const auto &R : unwrapOrError(this->FileName, Obj->relas(&Sec))) 3558 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, true); 3559 break; 3560 case ELF::SHT_RELR: 3561 case ELF::SHT_ANDROID_RELR: 3562 if (opts::RawRelr) 3563 for (const auto &R : unwrapOrError(this->FileName, Obj->relrs(&Sec))) 3564 OS << to_string(format_hex_no_prefix(R, ELFT::Is64Bits ? 16 : 8)) 3565 << "\n"; 3566 else 3567 for (const auto &R : RelrRelas) 3568 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, false); 3569 break; 3570 case ELF::SHT_ANDROID_REL: 3571 case ELF::SHT_ANDROID_RELA: 3572 for (const auto &R : AndroidRelas) 3573 printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, 3574 Sec.sh_type == ELF::SHT_ANDROID_RELA); 3575 break; 3576 } 3577 } 3578 if (!HasRelocSections) 3579 OS << "\nThere are no relocations in this file.\n"; 3580 } 3581 3582 // Print the offset of a particular section from anyone of the ranges: 3583 // [SHT_LOOS, SHT_HIOS], [SHT_LOPROC, SHT_HIPROC], [SHT_LOUSER, SHT_HIUSER]. 3584 // If 'Type' does not fall within any of those ranges, then a string is 3585 // returned as '<unknown>' followed by the type value. 3586 static std::string getSectionTypeOffsetString(unsigned Type) { 3587 if (Type >= SHT_LOOS && Type <= SHT_HIOS) 3588 return "LOOS+0x" + to_hexString(Type - SHT_LOOS); 3589 else if (Type >= SHT_LOPROC && Type <= SHT_HIPROC) 3590 return "LOPROC+0x" + to_hexString(Type - SHT_LOPROC); 3591 else if (Type >= SHT_LOUSER && Type <= SHT_HIUSER) 3592 return "LOUSER+0x" + to_hexString(Type - SHT_LOUSER); 3593 return "0x" + to_hexString(Type) + ": <unknown>"; 3594 } 3595 3596 static std::string getSectionTypeString(unsigned Arch, unsigned Type) { 3597 using namespace ELF; 3598 3599 switch (Arch) { 3600 case EM_ARM: 3601 switch (Type) { 3602 case SHT_ARM_EXIDX: 3603 return "ARM_EXIDX"; 3604 case SHT_ARM_PREEMPTMAP: 3605 return "ARM_PREEMPTMAP"; 3606 case SHT_ARM_ATTRIBUTES: 3607 return "ARM_ATTRIBUTES"; 3608 case SHT_ARM_DEBUGOVERLAY: 3609 return "ARM_DEBUGOVERLAY"; 3610 case SHT_ARM_OVERLAYSECTION: 3611 return "ARM_OVERLAYSECTION"; 3612 } 3613 break; 3614 case EM_X86_64: 3615 switch (Type) { 3616 case SHT_X86_64_UNWIND: 3617 return "X86_64_UNWIND"; 3618 } 3619 break; 3620 case EM_MIPS: 3621 case EM_MIPS_RS3_LE: 3622 switch (Type) { 3623 case SHT_MIPS_REGINFO: 3624 return "MIPS_REGINFO"; 3625 case SHT_MIPS_OPTIONS: 3626 return "MIPS_OPTIONS"; 3627 case SHT_MIPS_DWARF: 3628 return "MIPS_DWARF"; 3629 case SHT_MIPS_ABIFLAGS: 3630 return "MIPS_ABIFLAGS"; 3631 } 3632 break; 3633 case EM_RISCV: 3634 switch (Type) { 3635 case SHT_RISCV_ATTRIBUTES: 3636 return "RISCV_ATTRIBUTES"; 3637 } 3638 } 3639 switch (Type) { 3640 case SHT_NULL: 3641 return "NULL"; 3642 case SHT_PROGBITS: 3643 return "PROGBITS"; 3644 case SHT_SYMTAB: 3645 return "SYMTAB"; 3646 case SHT_STRTAB: 3647 return "STRTAB"; 3648 case SHT_RELA: 3649 return "RELA"; 3650 case SHT_HASH: 3651 return "HASH"; 3652 case SHT_DYNAMIC: 3653 return "DYNAMIC"; 3654 case SHT_NOTE: 3655 return "NOTE"; 3656 case SHT_NOBITS: 3657 return "NOBITS"; 3658 case SHT_REL: 3659 return "REL"; 3660 case SHT_SHLIB: 3661 return "SHLIB"; 3662 case SHT_DYNSYM: 3663 return "DYNSYM"; 3664 case SHT_INIT_ARRAY: 3665 return "INIT_ARRAY"; 3666 case SHT_FINI_ARRAY: 3667 return "FINI_ARRAY"; 3668 case SHT_PREINIT_ARRAY: 3669 return "PREINIT_ARRAY"; 3670 case SHT_GROUP: 3671 return "GROUP"; 3672 case SHT_SYMTAB_SHNDX: 3673 return "SYMTAB SECTION INDICES"; 3674 case SHT_ANDROID_REL: 3675 return "ANDROID_REL"; 3676 case SHT_ANDROID_RELA: 3677 return "ANDROID_RELA"; 3678 case SHT_RELR: 3679 case SHT_ANDROID_RELR: 3680 return "RELR"; 3681 case SHT_LLVM_ODRTAB: 3682 return "LLVM_ODRTAB"; 3683 case SHT_LLVM_LINKER_OPTIONS: 3684 return "LLVM_LINKER_OPTIONS"; 3685 case SHT_LLVM_CALL_GRAPH_PROFILE: 3686 return "LLVM_CALL_GRAPH_PROFILE"; 3687 case SHT_LLVM_ADDRSIG: 3688 return "LLVM_ADDRSIG"; 3689 case SHT_LLVM_DEPENDENT_LIBRARIES: 3690 return "LLVM_DEPENDENT_LIBRARIES"; 3691 case SHT_LLVM_SYMPART: 3692 return "LLVM_SYMPART"; 3693 case SHT_LLVM_PART_EHDR: 3694 return "LLVM_PART_EHDR"; 3695 case SHT_LLVM_PART_PHDR: 3696 return "LLVM_PART_PHDR"; 3697 // FIXME: Parse processor specific GNU attributes 3698 case SHT_GNU_ATTRIBUTES: 3699 return "ATTRIBUTES"; 3700 case SHT_GNU_HASH: 3701 return "GNU_HASH"; 3702 case SHT_GNU_verdef: 3703 return "VERDEF"; 3704 case SHT_GNU_verneed: 3705 return "VERNEED"; 3706 case SHT_GNU_versym: 3707 return "VERSYM"; 3708 default: 3709 return getSectionTypeOffsetString(Type); 3710 } 3711 return ""; 3712 } 3713 3714 static void printSectionDescription(formatted_raw_ostream &OS, 3715 unsigned EMachine) { 3716 OS << "Key to Flags:\n"; 3717 OS << " W (write), A (alloc), X (execute), M (merge), S (strings), I " 3718 "(info),\n"; 3719 OS << " L (link order), O (extra OS processing required), G (group), T " 3720 "(TLS),\n"; 3721 OS << " C (compressed), x (unknown), o (OS specific), E (exclude),\n"; 3722 3723 if (EMachine == EM_X86_64) 3724 OS << " l (large), "; 3725 else if (EMachine == EM_ARM) 3726 OS << " y (purecode), "; 3727 else 3728 OS << " "; 3729 3730 OS << "p (processor specific)\n"; 3731 } 3732 3733 template <class ELFT> 3734 void GNUStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 3735 unsigned Bias = ELFT::Is64Bits ? 0 : 8; 3736 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 3737 OS << "There are " << to_string(Sections.size()) 3738 << " section headers, starting at offset " 3739 << "0x" << to_hexString(Obj->getHeader()->e_shoff, false) << ":\n\n"; 3740 OS << "Section Headers:\n"; 3741 Field Fields[11] = { 3742 {"[Nr]", 2}, {"Name", 7}, {"Type", 25}, 3743 {"Address", 41}, {"Off", 58 - Bias}, {"Size", 65 - Bias}, 3744 {"ES", 72 - Bias}, {"Flg", 75 - Bias}, {"Lk", 79 - Bias}, 3745 {"Inf", 82 - Bias}, {"Al", 86 - Bias}}; 3746 for (auto &F : Fields) 3747 printField(F); 3748 OS << "\n"; 3749 3750 const ELFObjectFile<ELFT> *ElfObj = this->dumper()->getElfObject(); 3751 StringRef SecStrTable = unwrapOrError<StringRef>( 3752 ElfObj->getFileName(), 3753 Obj->getSectionStringTable(Sections, this->dumper()->WarningHandler)); 3754 size_t SectionIndex = 0; 3755 for (const Elf_Shdr &Sec : Sections) { 3756 Fields[0].Str = to_string(SectionIndex); 3757 if (SecStrTable.empty()) 3758 Fields[1].Str = "<no-strings>"; 3759 else 3760 Fields[1].Str = std::string(unwrapOrError<StringRef>( 3761 ElfObj->getFileName(), Obj->getSectionName(&Sec, SecStrTable))); 3762 Fields[2].Str = 3763 getSectionTypeString(Obj->getHeader()->e_machine, Sec.sh_type); 3764 Fields[3].Str = 3765 to_string(format_hex_no_prefix(Sec.sh_addr, ELFT::Is64Bits ? 16 : 8)); 3766 Fields[4].Str = to_string(format_hex_no_prefix(Sec.sh_offset, 6)); 3767 Fields[5].Str = to_string(format_hex_no_prefix(Sec.sh_size, 6)); 3768 Fields[6].Str = to_string(format_hex_no_prefix(Sec.sh_entsize, 2)); 3769 Fields[7].Str = getGNUFlags(Obj->getHeader()->e_machine, Sec.sh_flags); 3770 Fields[8].Str = to_string(Sec.sh_link); 3771 Fields[9].Str = to_string(Sec.sh_info); 3772 Fields[10].Str = to_string(Sec.sh_addralign); 3773 3774 OS.PadToColumn(Fields[0].Column); 3775 OS << "[" << right_justify(Fields[0].Str, 2) << "]"; 3776 for (int i = 1; i < 7; i++) 3777 printField(Fields[i]); 3778 OS.PadToColumn(Fields[7].Column); 3779 OS << right_justify(Fields[7].Str, 3); 3780 OS.PadToColumn(Fields[8].Column); 3781 OS << right_justify(Fields[8].Str, 2); 3782 OS.PadToColumn(Fields[9].Column); 3783 OS << right_justify(Fields[9].Str, 3); 3784 OS.PadToColumn(Fields[10].Column); 3785 OS << right_justify(Fields[10].Str, 2); 3786 OS << "\n"; 3787 ++SectionIndex; 3788 } 3789 printSectionDescription(OS, Obj->getHeader()->e_machine); 3790 } 3791 3792 template <class ELFT> 3793 void GNUStyle<ELFT>::printSymtabMessage(const ELFO *Obj, StringRef Name, 3794 size_t Entries, 3795 bool NonVisibilityBitsUsed) { 3796 if (!Name.empty()) 3797 OS << "\nSymbol table '" << Name << "'"; 3798 else 3799 OS << "\nSymbol table for image"; 3800 OS << " contains " << Entries << " entries:\n"; 3801 3802 if (ELFT::Is64Bits) 3803 OS << " Num: Value Size Type Bind Vis"; 3804 else 3805 OS << " Num: Value Size Type Bind Vis"; 3806 3807 if (NonVisibilityBitsUsed) 3808 OS << " "; 3809 OS << " Ndx Name\n"; 3810 } 3811 3812 template <class ELFT> 3813 std::string GNUStyle<ELFT>::getSymbolSectionNdx(const ELFO *Obj, 3814 const Elf_Sym *Symbol, 3815 const Elf_Sym *FirstSym) { 3816 unsigned SectionIndex = Symbol->st_shndx; 3817 switch (SectionIndex) { 3818 case ELF::SHN_UNDEF: 3819 return "UND"; 3820 case ELF::SHN_ABS: 3821 return "ABS"; 3822 case ELF::SHN_COMMON: 3823 return "COM"; 3824 case ELF::SHN_XINDEX: { 3825 Expected<uint32_t> IndexOrErr = object::getExtendedSymbolTableIndex<ELFT>( 3826 Symbol, FirstSym, this->dumper()->getShndxTable()); 3827 if (!IndexOrErr) { 3828 assert(Symbol->st_shndx == SHN_XINDEX && 3829 "getSymbolSectionIndex should only fail due to an invalid " 3830 "SHT_SYMTAB_SHNDX table/reference"); 3831 this->reportUniqueWarning(IndexOrErr.takeError()); 3832 return "RSV[0xffff]"; 3833 } 3834 return to_string(format_decimal(*IndexOrErr, 3)); 3835 } 3836 default: 3837 // Find if: 3838 // Processor specific 3839 if (SectionIndex >= ELF::SHN_LOPROC && SectionIndex <= ELF::SHN_HIPROC) 3840 return std::string("PRC[0x") + 3841 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3842 // OS specific 3843 if (SectionIndex >= ELF::SHN_LOOS && SectionIndex <= ELF::SHN_HIOS) 3844 return std::string("OS[0x") + 3845 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3846 // Architecture reserved: 3847 if (SectionIndex >= ELF::SHN_LORESERVE && 3848 SectionIndex <= ELF::SHN_HIRESERVE) 3849 return std::string("RSV[0x") + 3850 to_string(format_hex_no_prefix(SectionIndex, 4)) + "]"; 3851 // A normal section with an index 3852 return to_string(format_decimal(SectionIndex, 3)); 3853 } 3854 } 3855 3856 template <class ELFT> 3857 void GNUStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 3858 const Elf_Sym *FirstSym, StringRef StrTable, 3859 bool IsDynamic, bool NonVisibilityBitsUsed) { 3860 static int Idx = 0; 3861 static bool Dynamic = true; 3862 3863 // If this function was called with a different value from IsDynamic 3864 // from last call, happens when we move from dynamic to static symbol 3865 // table, "Num" field should be reset. 3866 if (!Dynamic != !IsDynamic) { 3867 Idx = 0; 3868 Dynamic = false; 3869 } 3870 3871 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3872 Field Fields[8] = {0, 8, 17 + Bias, 23 + Bias, 3873 31 + Bias, 38 + Bias, 48 + Bias, 51 + Bias}; 3874 Fields[0].Str = to_string(format_decimal(Idx++, 6)) + ":"; 3875 Fields[1].Str = to_string( 3876 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3877 Fields[2].Str = to_string(format_decimal(Symbol->st_size, 5)); 3878 3879 unsigned char SymbolType = Symbol->getType(); 3880 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3881 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3882 Fields[3].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3883 else 3884 Fields[3].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3885 3886 Fields[4].Str = 3887 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3888 Fields[5].Str = 3889 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3890 if (Symbol->st_other & ~0x3) 3891 Fields[5].Str += 3892 " [<other: " + to_string(format_hex(Symbol->st_other, 2)) + ">]"; 3893 3894 Fields[6].Column += NonVisibilityBitsUsed ? 13 : 0; 3895 Fields[6].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 3896 3897 Fields[7].Str = 3898 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 3899 for (auto &Entry : Fields) 3900 printField(Entry); 3901 OS << "\n"; 3902 } 3903 3904 template <class ELFT> 3905 void GNUStyle<ELFT>::printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, 3906 uint32_t Sym, StringRef StrTable, 3907 uint32_t Bucket) { 3908 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 3909 Field Fields[9] = {0, 6, 11, 20 + Bias, 25 + Bias, 3910 34 + Bias, 41 + Bias, 49 + Bias, 53 + Bias}; 3911 Fields[0].Str = to_string(format_decimal(Sym, 5)); 3912 Fields[1].Str = to_string(format_decimal(Bucket, 3)) + ":"; 3913 3914 const auto Symbol = FirstSym + Sym; 3915 Fields[2].Str = to_string( 3916 format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8)); 3917 Fields[3].Str = to_string(format_decimal(Symbol->st_size, 5)); 3918 3919 unsigned char SymbolType = Symbol->getType(); 3920 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 3921 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 3922 Fields[4].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 3923 else 3924 Fields[4].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes)); 3925 3926 Fields[5].Str = 3927 printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 3928 Fields[6].Str = 3929 printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities)); 3930 Fields[7].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym); 3931 Fields[8].Str = this->dumper()->getFullSymbolName(Symbol, StrTable, true); 3932 3933 for (auto &Entry : Fields) 3934 printField(Entry); 3935 OS << "\n"; 3936 } 3937 3938 template <class ELFT> 3939 void GNUStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 3940 bool PrintDynamicSymbols) { 3941 if (!PrintSymbols && !PrintDynamicSymbols) 3942 return; 3943 // GNU readelf prints both the .dynsym and .symtab with --symbols. 3944 this->dumper()->printSymbolsHelper(true); 3945 if (PrintSymbols) 3946 this->dumper()->printSymbolsHelper(false); 3947 } 3948 3949 template <class ELFT> void GNUStyle<ELFT>::printHashSymbols(const ELFO *Obj) { 3950 if (this->dumper()->getDynamicStringTable().empty()) 3951 return; 3952 auto StringTable = this->dumper()->getDynamicStringTable(); 3953 auto DynSyms = this->dumper()->dynamic_symbols(); 3954 3955 auto PrintHashTable = [&](const Elf_Hash *SysVHash) { 3956 if (ELFT::Is64Bits) 3957 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3958 else 3959 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3960 OS << "\n"; 3961 3962 auto Buckets = SysVHash->buckets(); 3963 auto Chains = SysVHash->chains(); 3964 for (uint32_t Buc = 0; Buc < SysVHash->nbucket; Buc++) { 3965 if (Buckets[Buc] == ELF::STN_UNDEF) 3966 continue; 3967 std::vector<bool> Visited(SysVHash->nchain); 3968 for (uint32_t Ch = Buckets[Buc]; Ch < SysVHash->nchain; Ch = Chains[Ch]) { 3969 if (Ch == ELF::STN_UNDEF) 3970 break; 3971 3972 if (Visited[Ch]) { 3973 reportWarning( 3974 createError(".hash section is invalid: bucket " + Twine(Ch) + 3975 ": a cycle was detected in the linked chain"), 3976 this->FileName); 3977 break; 3978 } 3979 3980 printHashedSymbol(Obj, &DynSyms[0], Ch, StringTable, Buc); 3981 Visited[Ch] = true; 3982 } 3983 } 3984 }; 3985 3986 if (const Elf_Hash *SysVHash = this->dumper()->getHashTable()) { 3987 OS << "\n Symbol table of .hash for image:\n"; 3988 if (checkHashTable(Obj, SysVHash, this->FileName)) 3989 PrintHashTable(SysVHash); 3990 } 3991 3992 // Try printing .gnu.hash 3993 if (auto GnuHash = this->dumper()->getGnuHashTable()) { 3994 OS << "\n Symbol table of .gnu.hash for image:\n"; 3995 if (ELFT::Is64Bits) 3996 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3997 else 3998 OS << " Num Buc: Value Size Type Bind Vis Ndx Name"; 3999 OS << "\n"; 4000 auto Buckets = GnuHash->buckets(); 4001 for (uint32_t Buc = 0; Buc < GnuHash->nbuckets; Buc++) { 4002 if (Buckets[Buc] == ELF::STN_UNDEF) 4003 continue; 4004 uint32_t Index = Buckets[Buc]; 4005 uint32_t GnuHashable = Index - GnuHash->symndx; 4006 // Print whole chain 4007 while (true) { 4008 printHashedSymbol(Obj, &DynSyms[0], Index++, StringTable, Buc); 4009 // Chain ends at symbol with stopper bit 4010 if ((GnuHash->values(DynSyms.size())[GnuHashable++] & 1) == 1) 4011 break; 4012 } 4013 } 4014 } 4015 } 4016 4017 static inline std::string printPhdrFlags(unsigned Flag) { 4018 std::string Str; 4019 Str = (Flag & PF_R) ? "R" : " "; 4020 Str += (Flag & PF_W) ? "W" : " "; 4021 Str += (Flag & PF_X) ? "E" : " "; 4022 return Str; 4023 } 4024 4025 // SHF_TLS sections are only in PT_TLS, PT_LOAD or PT_GNU_RELRO 4026 // PT_TLS must only have SHF_TLS sections 4027 template <class ELFT> 4028 bool GNUStyle<ELFT>::checkTLSSections(const Elf_Phdr &Phdr, 4029 const Elf_Shdr &Sec) { 4030 return (((Sec.sh_flags & ELF::SHF_TLS) && 4031 ((Phdr.p_type == ELF::PT_TLS) || (Phdr.p_type == ELF::PT_LOAD) || 4032 (Phdr.p_type == ELF::PT_GNU_RELRO))) || 4033 (!(Sec.sh_flags & ELF::SHF_TLS) && Phdr.p_type != ELF::PT_TLS)); 4034 } 4035 4036 // Non-SHT_NOBITS must have its offset inside the segment 4037 // Only non-zero section can be at end of segment 4038 template <class ELFT> 4039 bool GNUStyle<ELFT>::checkoffsets(const Elf_Phdr &Phdr, const Elf_Shdr &Sec) { 4040 if (Sec.sh_type == ELF::SHT_NOBITS) 4041 return true; 4042 bool IsSpecial = 4043 (Sec.sh_type == ELF::SHT_NOBITS) && ((Sec.sh_flags & ELF::SHF_TLS) != 0); 4044 // .tbss is special, it only has memory in PT_TLS and has NOBITS properties 4045 auto SectionSize = 4046 (IsSpecial && Phdr.p_type != ELF::PT_TLS) ? 0 : Sec.sh_size; 4047 if (Sec.sh_offset >= Phdr.p_offset) 4048 return ((Sec.sh_offset + SectionSize <= Phdr.p_filesz + Phdr.p_offset) 4049 /*only non-zero sized sections at end*/ 4050 && (Sec.sh_offset + 1 <= Phdr.p_offset + Phdr.p_filesz)); 4051 return false; 4052 } 4053 4054 // SHF_ALLOC must have VMA inside segment 4055 // Only non-zero section can be at end of segment 4056 template <class ELFT> 4057 bool GNUStyle<ELFT>::checkVMA(const Elf_Phdr &Phdr, const Elf_Shdr &Sec) { 4058 if (!(Sec.sh_flags & ELF::SHF_ALLOC)) 4059 return true; 4060 bool IsSpecial = 4061 (Sec.sh_type == ELF::SHT_NOBITS) && ((Sec.sh_flags & ELF::SHF_TLS) != 0); 4062 // .tbss is special, it only has memory in PT_TLS and has NOBITS properties 4063 auto SectionSize = 4064 (IsSpecial && Phdr.p_type != ELF::PT_TLS) ? 0 : Sec.sh_size; 4065 if (Sec.sh_addr >= Phdr.p_vaddr) 4066 return ((Sec.sh_addr + SectionSize <= Phdr.p_vaddr + Phdr.p_memsz) && 4067 (Sec.sh_addr + 1 <= Phdr.p_vaddr + Phdr.p_memsz)); 4068 return false; 4069 } 4070 4071 // No section with zero size must be at start or end of PT_DYNAMIC 4072 template <class ELFT> 4073 bool GNUStyle<ELFT>::checkPTDynamic(const Elf_Phdr &Phdr, const Elf_Shdr &Sec) { 4074 if (Phdr.p_type != ELF::PT_DYNAMIC || Sec.sh_size != 0 || Phdr.p_memsz == 0) 4075 return true; 4076 // Is section within the phdr both based on offset and VMA ? 4077 return ((Sec.sh_type == ELF::SHT_NOBITS) || 4078 (Sec.sh_offset > Phdr.p_offset && 4079 Sec.sh_offset < Phdr.p_offset + Phdr.p_filesz)) && 4080 (!(Sec.sh_flags & ELF::SHF_ALLOC) || 4081 (Sec.sh_addr > Phdr.p_vaddr && Sec.sh_addr < Phdr.p_memsz)); 4082 } 4083 4084 template <class ELFT> 4085 void GNUStyle<ELFT>::printProgramHeaders( 4086 const ELFO *Obj, bool PrintProgramHeaders, 4087 cl::boolOrDefault PrintSectionMapping) { 4088 if (PrintProgramHeaders) 4089 printProgramHeaders(Obj); 4090 4091 // Display the section mapping along with the program headers, unless 4092 // -section-mapping is explicitly set to false. 4093 if (PrintSectionMapping != cl::BOU_FALSE) 4094 printSectionMapping(Obj); 4095 } 4096 4097 template <class ELFT> 4098 void GNUStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 4099 unsigned Bias = ELFT::Is64Bits ? 8 : 0; 4100 const Elf_Ehdr *Header = Obj->getHeader(); 4101 Field Fields[8] = {2, 17, 26, 37 + Bias, 4102 48 + Bias, 56 + Bias, 64 + Bias, 68 + Bias}; 4103 OS << "\nElf file type is " 4104 << printEnum(Header->e_type, makeArrayRef(ElfObjectFileType)) << "\n" 4105 << "Entry point " << format_hex(Header->e_entry, 3) << "\n" 4106 << "There are " << Header->e_phnum << " program headers," 4107 << " starting at offset " << Header->e_phoff << "\n\n" 4108 << "Program Headers:\n"; 4109 if (ELFT::Is64Bits) 4110 OS << " Type Offset VirtAddr PhysAddr " 4111 << " FileSiz MemSiz Flg Align\n"; 4112 else 4113 OS << " Type Offset VirtAddr PhysAddr FileSiz " 4114 << "MemSiz Flg Align\n"; 4115 4116 unsigned Width = ELFT::Is64Bits ? 18 : 10; 4117 unsigned SizeWidth = ELFT::Is64Bits ? 8 : 7; 4118 for (const auto &Phdr : 4119 unwrapOrError(this->FileName, Obj->program_headers())) { 4120 Fields[0].Str = getElfPtType(Header->e_machine, Phdr.p_type); 4121 Fields[1].Str = to_string(format_hex(Phdr.p_offset, 8)); 4122 Fields[2].Str = to_string(format_hex(Phdr.p_vaddr, Width)); 4123 Fields[3].Str = to_string(format_hex(Phdr.p_paddr, Width)); 4124 Fields[4].Str = to_string(format_hex(Phdr.p_filesz, SizeWidth)); 4125 Fields[5].Str = to_string(format_hex(Phdr.p_memsz, SizeWidth)); 4126 Fields[6].Str = printPhdrFlags(Phdr.p_flags); 4127 Fields[7].Str = to_string(format_hex(Phdr.p_align, 1)); 4128 for (auto Field : Fields) 4129 printField(Field); 4130 if (Phdr.p_type == ELF::PT_INTERP) { 4131 OS << "\n [Requesting program interpreter: "; 4132 OS << reinterpret_cast<const char *>(Obj->base()) + Phdr.p_offset << "]"; 4133 } 4134 OS << "\n"; 4135 } 4136 } 4137 4138 template <class ELFT> 4139 void GNUStyle<ELFT>::printSectionMapping(const ELFO *Obj) { 4140 OS << "\n Section to Segment mapping:\n Segment Sections...\n"; 4141 DenseSet<const Elf_Shdr *> BelongsToSegment; 4142 int Phnum = 0; 4143 for (const Elf_Phdr &Phdr : 4144 unwrapOrError(this->FileName, Obj->program_headers())) { 4145 std::string Sections; 4146 OS << format(" %2.2d ", Phnum++); 4147 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4148 // Check if each section is in a segment and then print mapping. 4149 // readelf additionally makes sure it does not print zero sized sections 4150 // at end of segments and for PT_DYNAMIC both start and end of section 4151 // .tbss must only be shown in PT_TLS section. 4152 bool TbssInNonTLS = (Sec.sh_type == ELF::SHT_NOBITS) && 4153 ((Sec.sh_flags & ELF::SHF_TLS) != 0) && 4154 Phdr.p_type != ELF::PT_TLS; 4155 if (!TbssInNonTLS && checkTLSSections(Phdr, Sec) && 4156 checkoffsets(Phdr, Sec) && checkVMA(Phdr, Sec) && 4157 checkPTDynamic(Phdr, Sec) && (Sec.sh_type != ELF::SHT_NULL)) { 4158 Sections += 4159 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + 4160 " "; 4161 BelongsToSegment.insert(&Sec); 4162 } 4163 } 4164 OS << Sections << "\n"; 4165 OS.flush(); 4166 } 4167 4168 // Display sections that do not belong to a segment. 4169 std::string Sections; 4170 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 4171 if (BelongsToSegment.find(&Sec) == BelongsToSegment.end()) 4172 Sections += 4173 unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + ' '; 4174 } 4175 if (!Sections.empty()) { 4176 OS << " None " << Sections << '\n'; 4177 OS.flush(); 4178 } 4179 } 4180 4181 namespace { 4182 template <class ELFT> struct RelSymbol { 4183 const typename ELFT::Sym *Sym; 4184 std::string Name; 4185 }; 4186 4187 template <class ELFT> 4188 RelSymbol<ELFT> getSymbolForReloc(const ELFFile<ELFT> *Obj, StringRef FileName, 4189 const ELFDumper<ELFT> *Dumper, 4190 const typename ELFT::Rela &Reloc) { 4191 uint32_t SymIndex = Reloc.getSymbol(Obj->isMips64EL()); 4192 auto WarnAndReturn = [&](const typename ELFT::Sym *Sym, 4193 const Twine &Reason) -> RelSymbol<ELFT> { 4194 reportWarning( 4195 createError("unable to get name of the dynamic symbol with index " + 4196 Twine(SymIndex) + ": " + Reason), 4197 FileName); 4198 return {Sym, "<corrupt>"}; 4199 }; 4200 4201 ArrayRef<typename ELFT::Sym> Symbols = Dumper->dynamic_symbols(); 4202 const typename ELFT::Sym *FirstSym = Symbols.begin(); 4203 if (!FirstSym) 4204 return WarnAndReturn(nullptr, "no dynamic symbol table found"); 4205 4206 // We might have an object without a section header. In this case the size of 4207 // Symbols is zero, because there is no way to know the size of the dynamic 4208 // table. We should allow this case and not print a warning. 4209 if (!Symbols.empty() && SymIndex >= Symbols.size()) 4210 return WarnAndReturn( 4211 nullptr, 4212 "index is greater than or equal to the number of dynamic symbols (" + 4213 Twine(Symbols.size()) + ")"); 4214 4215 const typename ELFT::Sym *Sym = FirstSym + SymIndex; 4216 Expected<StringRef> ErrOrName = Sym->getName(Dumper->getDynamicStringTable()); 4217 if (!ErrOrName) 4218 return WarnAndReturn(Sym, toString(ErrOrName.takeError())); 4219 4220 return {Sym, maybeDemangle(*ErrOrName)}; 4221 } 4222 } // namespace 4223 4224 template <class ELFT> 4225 void GNUStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela R, 4226 bool IsRela) { 4227 RelSymbol<ELFT> S = getSymbolForReloc(Obj, this->FileName, this->dumper(), R); 4228 printRelocation(Obj, S.Sym, S.Name, R, IsRela); 4229 } 4230 4231 template <class ELFT> 4232 static size_t getMaxDynamicTagSize(const ELFFile<ELFT> *Obj, 4233 typename ELFT::DynRange Tags) { 4234 size_t Max = 0; 4235 for (const typename ELFT::Dyn &Dyn : Tags) 4236 Max = std::max(Max, Obj->getDynamicTagAsString(Dyn.d_tag).size()); 4237 return Max; 4238 } 4239 4240 template <class ELFT> void GNUStyle<ELFT>::printDynamic(const ELFO *Obj) { 4241 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 4242 if (Table.empty()) 4243 return; 4244 4245 const DynRegionInfo &DynamicTableRegion = 4246 this->dumper()->getDynamicTableRegion(); 4247 4248 OS << "Dynamic section at offset " 4249 << format_hex(reinterpret_cast<const uint8_t *>(DynamicTableRegion.Addr) - 4250 Obj->base(), 4251 1) 4252 << " contains " << Table.size() << " entries:\n"; 4253 4254 // The type name is surrounded with round brackets, hence add 2. 4255 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table) + 2; 4256 // The "Name/Value" column should be indented from the "Type" column by N 4257 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 4258 // space (1) = 3. 4259 OS << " Tag" + std::string(ELFT::Is64Bits ? 16 : 8, ' ') + "Type" 4260 << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 4261 4262 std::string ValueFmt = " %-" + std::to_string(MaxTagSize) + "s "; 4263 for (auto Entry : Table) { 4264 uintX_t Tag = Entry.getTag(); 4265 std::string Type = 4266 std::string("(") + Obj->getDynamicTagAsString(Tag).c_str() + ")"; 4267 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 4268 OS << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10) 4269 << format(ValueFmt.c_str(), Type.c_str()) << Value << "\n"; 4270 } 4271 } 4272 4273 template <class ELFT> 4274 void GNUStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 4275 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 4276 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 4277 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 4278 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 4279 if (DynRelaRegion.Size > 0) { 4280 OS << "\n'RELA' relocation section at offset " 4281 << format_hex(reinterpret_cast<const uint8_t *>(DynRelaRegion.Addr) - 4282 Obj->base(), 4283 1) 4284 << " contains " << DynRelaRegion.Size << " bytes:\n"; 4285 printRelocHeader(ELF::SHT_RELA); 4286 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 4287 printDynamicRelocation(Obj, Rela, true); 4288 } 4289 if (DynRelRegion.Size > 0) { 4290 OS << "\n'REL' relocation section at offset " 4291 << format_hex(reinterpret_cast<const uint8_t *>(DynRelRegion.Addr) - 4292 Obj->base(), 4293 1) 4294 << " contains " << DynRelRegion.Size << " bytes:\n"; 4295 printRelocHeader(ELF::SHT_REL); 4296 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 4297 Elf_Rela Rela; 4298 Rela.r_offset = Rel.r_offset; 4299 Rela.r_info = Rel.r_info; 4300 Rela.r_addend = 0; 4301 printDynamicRelocation(Obj, Rela, false); 4302 } 4303 } 4304 if (DynRelrRegion.Size > 0) { 4305 OS << "\n'RELR' relocation section at offset " 4306 << format_hex(reinterpret_cast<const uint8_t *>(DynRelrRegion.Addr) - 4307 Obj->base(), 4308 1) 4309 << " contains " << DynRelrRegion.Size << " bytes:\n"; 4310 printRelocHeader(ELF::SHT_REL); 4311 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 4312 std::vector<Elf_Rela> RelrRelas = 4313 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 4314 for (const Elf_Rela &Rela : RelrRelas) { 4315 printDynamicRelocation(Obj, Rela, false); 4316 } 4317 } 4318 if (DynPLTRelRegion.Size) { 4319 OS << "\n'PLT' relocation section at offset " 4320 << format_hex(reinterpret_cast<const uint8_t *>(DynPLTRelRegion.Addr) - 4321 Obj->base(), 4322 1) 4323 << " contains " << DynPLTRelRegion.Size << " bytes:\n"; 4324 } 4325 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) { 4326 printRelocHeader(ELF::SHT_RELA); 4327 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 4328 printDynamicRelocation(Obj, Rela, true); 4329 } else { 4330 printRelocHeader(ELF::SHT_REL); 4331 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 4332 Elf_Rela Rela; 4333 Rela.r_offset = Rel.r_offset; 4334 Rela.r_info = Rel.r_info; 4335 Rela.r_addend = 0; 4336 printDynamicRelocation(Obj, Rela, false); 4337 } 4338 } 4339 } 4340 4341 template <class ELFT> 4342 void GNUStyle<ELFT>::printGNUVersionSectionProlog( 4343 const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec, 4344 const Twine &Label, unsigned EntriesNum) { 4345 StringRef SecName = unwrapOrError(this->FileName, Obj->getSectionName(Sec)); 4346 OS << Label << " section '" << SecName << "' " 4347 << "contains " << EntriesNum << " entries:\n"; 4348 4349 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4350 StringRef SymTabName = "<corrupt>"; 4351 4352 Expected<const typename ELFT::Shdr *> SymTabOrErr = 4353 Obj->getSection(Sec->sh_link); 4354 if (SymTabOrErr) 4355 SymTabName = 4356 unwrapOrError(this->FileName, Obj->getSectionName(*SymTabOrErr)); 4357 else 4358 this->reportUniqueWarning( 4359 createError("invalid section linked to " + 4360 object::getELFSectionTypeName(Obj->getHeader()->e_machine, 4361 Sec->sh_type) + 4362 " section with index " + Twine(SecNdx) + ": " + 4363 toString(SymTabOrErr.takeError()))); 4364 4365 OS << " Addr: " << format_hex_no_prefix(Sec->sh_addr, 16) 4366 << " Offset: " << format_hex(Sec->sh_offset, 8) 4367 << " Link: " << Sec->sh_link << " (" << SymTabName << ")\n"; 4368 } 4369 4370 template <class ELFT> 4371 void GNUStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 4372 const Elf_Shdr *Sec) { 4373 if (!Sec) 4374 return; 4375 4376 printGNUVersionSectionProlog(Obj, Sec, "Version symbols", 4377 Sec->sh_size / sizeof(Elf_Versym)); 4378 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 4379 this->dumper()->getVersionTable(Sec, /*SymTab=*/nullptr, 4380 /*StrTab=*/nullptr); 4381 if (!VerTableOrErr) { 4382 this->reportUniqueWarning(VerTableOrErr.takeError()); 4383 return; 4384 } 4385 4386 ArrayRef<Elf_Versym> VerTable = *VerTableOrErr; 4387 std::vector<StringRef> Versions; 4388 for (size_t I = 0, E = VerTable.size(); I < E; ++I) { 4389 unsigned Ndx = VerTable[I].vs_index; 4390 if (Ndx == VER_NDX_LOCAL || Ndx == VER_NDX_GLOBAL) { 4391 Versions.emplace_back(Ndx == VER_NDX_LOCAL ? "*local*" : "*global*"); 4392 continue; 4393 } 4394 4395 bool IsDefault; 4396 Expected<StringRef> NameOrErr = 4397 this->dumper()->getSymbolVersionByIndex(Ndx, IsDefault); 4398 if (!NameOrErr) { 4399 if (!NameOrErr) { 4400 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 4401 this->reportUniqueWarning(createError( 4402 "unable to get a version for entry " + Twine(I) + 4403 " of SHT_GNU_versym section with index " + Twine(SecNdx) + ": " + 4404 toString(NameOrErr.takeError()))); 4405 } 4406 Versions.emplace_back("<corrupt>"); 4407 continue; 4408 } 4409 Versions.emplace_back(*NameOrErr); 4410 } 4411 4412 // readelf prints 4 entries per line. 4413 uint64_t Entries = VerTable.size(); 4414 for (uint64_t VersymRow = 0; VersymRow < Entries; VersymRow += 4) { 4415 OS << " " << format_hex_no_prefix(VersymRow, 3) << ":"; 4416 for (uint64_t I = 0; (I < 4) && (I + VersymRow) < Entries; ++I) { 4417 unsigned Ndx = VerTable[VersymRow + I].vs_index; 4418 OS << format("%4x%c", Ndx & VERSYM_VERSION, 4419 Ndx & VERSYM_HIDDEN ? 'h' : ' '); 4420 OS << left_justify("(" + std::string(Versions[VersymRow + I]) + ")", 13); 4421 } 4422 OS << '\n'; 4423 } 4424 OS << '\n'; 4425 } 4426 4427 static std::string versionFlagToString(unsigned Flags) { 4428 if (Flags == 0) 4429 return "none"; 4430 4431 std::string Ret; 4432 auto AddFlag = [&Ret, &Flags](unsigned Flag, StringRef Name) { 4433 if (!(Flags & Flag)) 4434 return; 4435 if (!Ret.empty()) 4436 Ret += " | "; 4437 Ret += Name; 4438 Flags &= ~Flag; 4439 }; 4440 4441 AddFlag(VER_FLG_BASE, "BASE"); 4442 AddFlag(VER_FLG_WEAK, "WEAK"); 4443 AddFlag(VER_FLG_INFO, "INFO"); 4444 AddFlag(~0, "<unknown>"); 4445 return Ret; 4446 } 4447 4448 template <class ELFT> 4449 void GNUStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 4450 const Elf_Shdr *Sec) { 4451 if (!Sec) 4452 return; 4453 4454 printGNUVersionSectionProlog(Obj, Sec, "Version definition", Sec->sh_info); 4455 4456 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 4457 if (!V) { 4458 this->reportUniqueWarning(V.takeError()); 4459 return; 4460 } 4461 4462 for (const VerDef &Def : *V) { 4463 OS << format(" 0x%04x: Rev: %u Flags: %s Index: %u Cnt: %u Name: %s\n", 4464 Def.Offset, Def.Version, 4465 versionFlagToString(Def.Flags).c_str(), Def.Ndx, Def.Cnt, 4466 Def.Name.data()); 4467 unsigned I = 0; 4468 for (const VerdAux &Aux : Def.AuxV) 4469 OS << format(" 0x%04x: Parent %u: %s\n", Aux.Offset, ++I, 4470 Aux.Name.data()); 4471 } 4472 4473 OS << '\n'; 4474 } 4475 4476 template <class ELFT> 4477 void GNUStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 4478 const Elf_Shdr *Sec) { 4479 if (!Sec) 4480 return; 4481 4482 unsigned VerneedNum = Sec->sh_info; 4483 printGNUVersionSectionProlog(Obj, Sec, "Version needs", VerneedNum); 4484 4485 Expected<std::vector<VerNeed>> V = 4486 this->dumper()->getVersionDependencies(Sec); 4487 if (!V) { 4488 this->reportUniqueWarning(V.takeError()); 4489 return; 4490 } 4491 4492 for (const VerNeed &VN : *V) { 4493 OS << format(" 0x%04x: Version: %u File: %s Cnt: %u\n", VN.Offset, 4494 VN.Version, VN.File.data(), VN.Cnt); 4495 for (const VernAux &Aux : VN.AuxV) 4496 OS << format(" 0x%04x: Name: %s Flags: %s Version: %u\n", Aux.Offset, 4497 Aux.Name.data(), versionFlagToString(Aux.Flags).c_str(), 4498 Aux.Other); 4499 } 4500 OS << '\n'; 4501 } 4502 4503 // Hash histogram shows statistics of how efficient the hash was for the 4504 // dynamic symbol table. The table shows number of hash buckets for different 4505 // lengths of chains as absolute number and percentage of the total buckets. 4506 // Additionally cumulative coverage of symbols for each set of buckets. 4507 template <class ELFT> 4508 void GNUStyle<ELFT>::printHashHistogram(const ELFFile<ELFT> *Obj) { 4509 // Print histogram for .hash section 4510 if (const Elf_Hash *HashTable = this->dumper()->getHashTable()) { 4511 if (!checkHashTable(Obj, HashTable, this->FileName)) 4512 return; 4513 4514 size_t NBucket = HashTable->nbucket; 4515 size_t NChain = HashTable->nchain; 4516 ArrayRef<Elf_Word> Buckets = HashTable->buckets(); 4517 ArrayRef<Elf_Word> Chains = HashTable->chains(); 4518 size_t TotalSyms = 0; 4519 // If hash table is correct, we have at least chains with 0 length 4520 size_t MaxChain = 1; 4521 size_t CumulativeNonZero = 0; 4522 4523 if (NChain == 0 || NBucket == 0) 4524 return; 4525 4526 std::vector<size_t> ChainLen(NBucket, 0); 4527 // Go over all buckets and and note chain lengths of each bucket (total 4528 // unique chain lengths). 4529 for (size_t B = 0; B < NBucket; B++) { 4530 std::vector<bool> Visited(NChain); 4531 for (size_t C = Buckets[B]; C < NChain; C = Chains[C]) { 4532 if (C == ELF::STN_UNDEF) 4533 break; 4534 if (Visited[C]) { 4535 reportWarning( 4536 createError(".hash section is invalid: bucket " + Twine(C) + 4537 ": a cycle was detected in the linked chain"), 4538 this->FileName); 4539 break; 4540 } 4541 Visited[C] = true; 4542 if (MaxChain <= ++ChainLen[B]) 4543 MaxChain++; 4544 } 4545 TotalSyms += ChainLen[B]; 4546 } 4547 4548 if (!TotalSyms) 4549 return; 4550 4551 std::vector<size_t> Count(MaxChain, 0) ; 4552 // Count how long is the chain for each bucket 4553 for (size_t B = 0; B < NBucket; B++) 4554 ++Count[ChainLen[B]]; 4555 // Print Number of buckets with each chain lengths and their cumulative 4556 // coverage of the symbols 4557 OS << "Histogram for bucket list length (total of " << NBucket 4558 << " buckets)\n" 4559 << " Length Number % of total Coverage\n"; 4560 for (size_t I = 0; I < MaxChain; I++) { 4561 CumulativeNonZero += Count[I] * I; 4562 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4563 (Count[I] * 100.0) / NBucket, 4564 (CumulativeNonZero * 100.0) / TotalSyms); 4565 } 4566 } 4567 4568 // Print histogram for .gnu.hash section 4569 if (const Elf_GnuHash *GnuHashTable = this->dumper()->getGnuHashTable()) { 4570 size_t NBucket = GnuHashTable->nbuckets; 4571 ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets(); 4572 unsigned NumSyms = this->dumper()->dynamic_symbols().size(); 4573 if (!NumSyms) 4574 return; 4575 ArrayRef<Elf_Word> Chains = GnuHashTable->values(NumSyms); 4576 size_t Symndx = GnuHashTable->symndx; 4577 size_t TotalSyms = 0; 4578 size_t MaxChain = 1; 4579 size_t CumulativeNonZero = 0; 4580 4581 if (Chains.empty() || NBucket == 0) 4582 return; 4583 4584 std::vector<size_t> ChainLen(NBucket, 0); 4585 4586 for (size_t B = 0; B < NBucket; B++) { 4587 if (!Buckets[B]) 4588 continue; 4589 size_t Len = 1; 4590 for (size_t C = Buckets[B] - Symndx; 4591 C < Chains.size() && (Chains[C] & 1) == 0; C++) 4592 if (MaxChain < ++Len) 4593 MaxChain++; 4594 ChainLen[B] = Len; 4595 TotalSyms += Len; 4596 } 4597 MaxChain++; 4598 4599 if (!TotalSyms) 4600 return; 4601 4602 std::vector<size_t> Count(MaxChain, 0) ; 4603 for (size_t B = 0; B < NBucket; B++) 4604 ++Count[ChainLen[B]]; 4605 // Print Number of buckets with each chain lengths and their cumulative 4606 // coverage of the symbols 4607 OS << "Histogram for `.gnu.hash' bucket list length (total of " << NBucket 4608 << " buckets)\n" 4609 << " Length Number % of total Coverage\n"; 4610 for (size_t I = 0; I <MaxChain; I++) { 4611 CumulativeNonZero += Count[I] * I; 4612 OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I], 4613 (Count[I] * 100.0) / NBucket, 4614 (CumulativeNonZero * 100.0) / TotalSyms); 4615 } 4616 } 4617 } 4618 4619 template <class ELFT> 4620 void GNUStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 4621 OS << "GNUStyle::printCGProfile not implemented\n"; 4622 } 4623 4624 template <class ELFT> 4625 void GNUStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 4626 reportError(createError("--addrsig: not implemented"), this->FileName); 4627 } 4628 4629 static StringRef getGenericNoteTypeName(const uint32_t NT) { 4630 static const struct { 4631 uint32_t ID; 4632 const char *Name; 4633 } Notes[] = { 4634 {ELF::NT_VERSION, "NT_VERSION (version)"}, 4635 {ELF::NT_ARCH, "NT_ARCH (architecture)"}, 4636 {ELF::NT_GNU_BUILD_ATTRIBUTE_OPEN, "OPEN"}, 4637 {ELF::NT_GNU_BUILD_ATTRIBUTE_FUNC, "func"}, 4638 }; 4639 4640 for (const auto &Note : Notes) 4641 if (Note.ID == NT) 4642 return Note.Name; 4643 4644 return ""; 4645 } 4646 4647 static StringRef getCoreNoteTypeName(const uint32_t NT) { 4648 static const struct { 4649 uint32_t ID; 4650 const char *Name; 4651 } Notes[] = { 4652 {ELF::NT_PRSTATUS, "NT_PRSTATUS (prstatus structure)"}, 4653 {ELF::NT_FPREGSET, "NT_FPREGSET (floating point registers)"}, 4654 {ELF::NT_PRPSINFO, "NT_PRPSINFO (prpsinfo structure)"}, 4655 {ELF::NT_TASKSTRUCT, "NT_TASKSTRUCT (task structure)"}, 4656 {ELF::NT_AUXV, "NT_AUXV (auxiliary vector)"}, 4657 {ELF::NT_PSTATUS, "NT_PSTATUS (pstatus structure)"}, 4658 {ELF::NT_FPREGS, "NT_FPREGS (floating point registers)"}, 4659 {ELF::NT_PSINFO, "NT_PSINFO (psinfo structure)"}, 4660 {ELF::NT_LWPSTATUS, "NT_LWPSTATUS (lwpstatus_t structure)"}, 4661 {ELF::NT_LWPSINFO, "NT_LWPSINFO (lwpsinfo_t structure)"}, 4662 {ELF::NT_WIN32PSTATUS, "NT_WIN32PSTATUS (win32_pstatus structure)"}, 4663 4664 {ELF::NT_PPC_VMX, "NT_PPC_VMX (ppc Altivec registers)"}, 4665 {ELF::NT_PPC_VSX, "NT_PPC_VSX (ppc VSX registers)"}, 4666 {ELF::NT_PPC_TAR, "NT_PPC_TAR (ppc TAR register)"}, 4667 {ELF::NT_PPC_PPR, "NT_PPC_PPR (ppc PPR register)"}, 4668 {ELF::NT_PPC_DSCR, "NT_PPC_DSCR (ppc DSCR register)"}, 4669 {ELF::NT_PPC_EBB, "NT_PPC_EBB (ppc EBB registers)"}, 4670 {ELF::NT_PPC_PMU, "NT_PPC_PMU (ppc PMU registers)"}, 4671 {ELF::NT_PPC_TM_CGPR, "NT_PPC_TM_CGPR (ppc checkpointed GPR registers)"}, 4672 {ELF::NT_PPC_TM_CFPR, 4673 "NT_PPC_TM_CFPR (ppc checkpointed floating point registers)"}, 4674 {ELF::NT_PPC_TM_CVMX, 4675 "NT_PPC_TM_CVMX (ppc checkpointed Altivec registers)"}, 4676 {ELF::NT_PPC_TM_CVSX, "NT_PPC_TM_CVSX (ppc checkpointed VSX registers)"}, 4677 {ELF::NT_PPC_TM_SPR, "NT_PPC_TM_SPR (ppc TM special purpose registers)"}, 4678 {ELF::NT_PPC_TM_CTAR, "NT_PPC_TM_CTAR (ppc checkpointed TAR register)"}, 4679 {ELF::NT_PPC_TM_CPPR, "NT_PPC_TM_CPPR (ppc checkpointed PPR register)"}, 4680 {ELF::NT_PPC_TM_CDSCR, 4681 "NT_PPC_TM_CDSCR (ppc checkpointed DSCR register)"}, 4682 4683 {ELF::NT_386_TLS, "NT_386_TLS (x86 TLS information)"}, 4684 {ELF::NT_386_IOPERM, "NT_386_IOPERM (x86 I/O permissions)"}, 4685 {ELF::NT_X86_XSTATE, "NT_X86_XSTATE (x86 XSAVE extended state)"}, 4686 4687 {ELF::NT_S390_HIGH_GPRS, 4688 "NT_S390_HIGH_GPRS (s390 upper register halves)"}, 4689 {ELF::NT_S390_TIMER, "NT_S390_TIMER (s390 timer register)"}, 4690 {ELF::NT_S390_TODCMP, "NT_S390_TODCMP (s390 TOD comparator register)"}, 4691 {ELF::NT_S390_TODPREG, 4692 "NT_S390_TODPREG (s390 TOD programmable register)"}, 4693 {ELF::NT_S390_CTRS, "NT_S390_CTRS (s390 control registers)"}, 4694 {ELF::NT_S390_PREFIX, "NT_S390_PREFIX (s390 prefix register)"}, 4695 {ELF::NT_S390_LAST_BREAK, 4696 "NT_S390_LAST_BREAK (s390 last breaking event address)"}, 4697 {ELF::NT_S390_SYSTEM_CALL, 4698 "NT_S390_SYSTEM_CALL (s390 system call restart data)"}, 4699 {ELF::NT_S390_TDB, "NT_S390_TDB (s390 transaction diagnostic block)"}, 4700 {ELF::NT_S390_VXRS_LOW, 4701 "NT_S390_VXRS_LOW (s390 vector registers 0-15 upper half)"}, 4702 {ELF::NT_S390_VXRS_HIGH, 4703 "NT_S390_VXRS_HIGH (s390 vector registers 16-31)"}, 4704 {ELF::NT_S390_GS_CB, "NT_S390_GS_CB (s390 guarded-storage registers)"}, 4705 {ELF::NT_S390_GS_BC, 4706 "NT_S390_GS_BC (s390 guarded-storage broadcast control)"}, 4707 4708 {ELF::NT_ARM_VFP, "NT_ARM_VFP (arm VFP registers)"}, 4709 {ELF::NT_ARM_TLS, "NT_ARM_TLS (AArch TLS registers)"}, 4710 {ELF::NT_ARM_HW_BREAK, 4711 "NT_ARM_HW_BREAK (AArch hardware breakpoint registers)"}, 4712 {ELF::NT_ARM_HW_WATCH, 4713 "NT_ARM_HW_WATCH (AArch hardware watchpoint registers)"}, 4714 4715 {ELF::NT_FILE, "NT_FILE (mapped files)"}, 4716 {ELF::NT_PRXFPREG, "NT_PRXFPREG (user_xfpregs structure)"}, 4717 {ELF::NT_SIGINFO, "NT_SIGINFO (siginfo_t data)"}, 4718 }; 4719 4720 for (const auto &Note : Notes) 4721 if (Note.ID == NT) 4722 return Note.Name; 4723 4724 return ""; 4725 } 4726 4727 static std::string getGNUNoteTypeName(const uint32_t NT) { 4728 static const struct { 4729 uint32_t ID; 4730 const char *Name; 4731 } Notes[] = { 4732 {ELF::NT_GNU_ABI_TAG, "NT_GNU_ABI_TAG (ABI version tag)"}, 4733 {ELF::NT_GNU_HWCAP, "NT_GNU_HWCAP (DSO-supplied software HWCAP info)"}, 4734 {ELF::NT_GNU_BUILD_ID, "NT_GNU_BUILD_ID (unique build ID bitstring)"}, 4735 {ELF::NT_GNU_GOLD_VERSION, "NT_GNU_GOLD_VERSION (gold version)"}, 4736 {ELF::NT_GNU_PROPERTY_TYPE_0, "NT_GNU_PROPERTY_TYPE_0 (property note)"}, 4737 }; 4738 4739 for (const auto &Note : Notes) 4740 if (Note.ID == NT) 4741 return std::string(Note.Name); 4742 4743 std::string string; 4744 raw_string_ostream OS(string); 4745 OS << format("Unknown note type (0x%08x)", NT); 4746 return OS.str(); 4747 } 4748 4749 static std::string getFreeBSDNoteTypeName(const uint32_t NT) { 4750 static const struct { 4751 uint32_t ID; 4752 const char *Name; 4753 } Notes[] = { 4754 {ELF::NT_FREEBSD_THRMISC, "NT_THRMISC (thrmisc structure)"}, 4755 {ELF::NT_FREEBSD_PROCSTAT_PROC, "NT_PROCSTAT_PROC (proc data)"}, 4756 {ELF::NT_FREEBSD_PROCSTAT_FILES, "NT_PROCSTAT_FILES (files data)"}, 4757 {ELF::NT_FREEBSD_PROCSTAT_VMMAP, "NT_PROCSTAT_VMMAP (vmmap data)"}, 4758 {ELF::NT_FREEBSD_PROCSTAT_GROUPS, "NT_PROCSTAT_GROUPS (groups data)"}, 4759 {ELF::NT_FREEBSD_PROCSTAT_UMASK, "NT_PROCSTAT_UMASK (umask data)"}, 4760 {ELF::NT_FREEBSD_PROCSTAT_RLIMIT, "NT_PROCSTAT_RLIMIT (rlimit data)"}, 4761 {ELF::NT_FREEBSD_PROCSTAT_OSREL, "NT_PROCSTAT_OSREL (osreldate data)"}, 4762 {ELF::NT_FREEBSD_PROCSTAT_PSSTRINGS, 4763 "NT_PROCSTAT_PSSTRINGS (ps_strings data)"}, 4764 {ELF::NT_FREEBSD_PROCSTAT_AUXV, "NT_PROCSTAT_AUXV (auxv data)"}, 4765 }; 4766 4767 for (const auto &Note : Notes) 4768 if (Note.ID == NT) 4769 return std::string(Note.Name); 4770 4771 std::string string; 4772 raw_string_ostream OS(string); 4773 OS << format("Unknown note type (0x%08x)", NT); 4774 return OS.str(); 4775 } 4776 4777 static std::string getAMDNoteTypeName(const uint32_t NT) { 4778 static const struct { 4779 uint32_t ID; 4780 const char *Name; 4781 } Notes[] = {{ELF::NT_AMD_AMDGPU_HSA_METADATA, 4782 "NT_AMD_AMDGPU_HSA_METADATA (HSA Metadata)"}, 4783 {ELF::NT_AMD_AMDGPU_ISA, "NT_AMD_AMDGPU_ISA (ISA Version)"}, 4784 {ELF::NT_AMD_AMDGPU_PAL_METADATA, 4785 "NT_AMD_AMDGPU_PAL_METADATA (PAL Metadata)"}}; 4786 4787 for (const auto &Note : Notes) 4788 if (Note.ID == NT) 4789 return std::string(Note.Name); 4790 4791 std::string string; 4792 raw_string_ostream OS(string); 4793 OS << format("Unknown note type (0x%08x)", NT); 4794 return OS.str(); 4795 } 4796 4797 static std::string getAMDGPUNoteTypeName(const uint32_t NT) { 4798 if (NT == ELF::NT_AMDGPU_METADATA) 4799 return std::string("NT_AMDGPU_METADATA (AMDGPU Metadata)"); 4800 4801 std::string string; 4802 raw_string_ostream OS(string); 4803 OS << format("Unknown note type (0x%08x)", NT); 4804 return OS.str(); 4805 } 4806 4807 template <typename ELFT> 4808 static std::string getGNUProperty(uint32_t Type, uint32_t DataSize, 4809 ArrayRef<uint8_t> Data) { 4810 std::string str; 4811 raw_string_ostream OS(str); 4812 uint32_t PrData; 4813 auto DumpBit = [&](uint32_t Flag, StringRef Name) { 4814 if (PrData & Flag) { 4815 PrData &= ~Flag; 4816 OS << Name; 4817 if (PrData) 4818 OS << ", "; 4819 } 4820 }; 4821 4822 switch (Type) { 4823 default: 4824 OS << format("<application-specific type 0x%x>", Type); 4825 return OS.str(); 4826 case GNU_PROPERTY_STACK_SIZE: { 4827 OS << "stack size: "; 4828 if (DataSize == sizeof(typename ELFT::uint)) 4829 OS << formatv("{0:x}", 4830 (uint64_t)(*(const typename ELFT::Addr *)Data.data())); 4831 else 4832 OS << format("<corrupt length: 0x%x>", DataSize); 4833 return OS.str(); 4834 } 4835 case GNU_PROPERTY_NO_COPY_ON_PROTECTED: 4836 OS << "no copy on protected"; 4837 if (DataSize) 4838 OS << format(" <corrupt length: 0x%x>", DataSize); 4839 return OS.str(); 4840 case GNU_PROPERTY_AARCH64_FEATURE_1_AND: 4841 case GNU_PROPERTY_X86_FEATURE_1_AND: 4842 OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: " 4843 : "x86 feature: "); 4844 if (DataSize != 4) { 4845 OS << format("<corrupt length: 0x%x>", DataSize); 4846 return OS.str(); 4847 } 4848 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4849 if (PrData == 0) { 4850 OS << "<None>"; 4851 return OS.str(); 4852 } 4853 if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) { 4854 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI"); 4855 DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC"); 4856 } else { 4857 DumpBit(GNU_PROPERTY_X86_FEATURE_1_IBT, "IBT"); 4858 DumpBit(GNU_PROPERTY_X86_FEATURE_1_SHSTK, "SHSTK"); 4859 } 4860 if (PrData) 4861 OS << format("<unknown flags: 0x%x>", PrData); 4862 return OS.str(); 4863 case GNU_PROPERTY_X86_ISA_1_NEEDED: 4864 case GNU_PROPERTY_X86_ISA_1_USED: 4865 OS << "x86 ISA " 4866 << (Type == GNU_PROPERTY_X86_ISA_1_NEEDED ? "needed: " : "used: "); 4867 if (DataSize != 4) { 4868 OS << format("<corrupt length: 0x%x>", DataSize); 4869 return OS.str(); 4870 } 4871 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4872 if (PrData == 0) { 4873 OS << "<None>"; 4874 return OS.str(); 4875 } 4876 DumpBit(GNU_PROPERTY_X86_ISA_1_CMOV, "CMOV"); 4877 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE, "SSE"); 4878 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE2, "SSE2"); 4879 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE3, "SSE3"); 4880 DumpBit(GNU_PROPERTY_X86_ISA_1_SSSE3, "SSSE3"); 4881 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_1, "SSE4_1"); 4882 DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_2, "SSE4_2"); 4883 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX, "AVX"); 4884 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX2, "AVX2"); 4885 DumpBit(GNU_PROPERTY_X86_ISA_1_FMA, "FMA"); 4886 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512F, "AVX512F"); 4887 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512CD, "AVX512CD"); 4888 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512ER, "AVX512ER"); 4889 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512PF, "AVX512PF"); 4890 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512VL, "AVX512VL"); 4891 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512DQ, "AVX512DQ"); 4892 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512BW, "AVX512BW"); 4893 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4FMAPS, "AVX512_4FMAPS"); 4894 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4VNNIW, "AVX512_4VNNIW"); 4895 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_BITALG, "AVX512_BITALG"); 4896 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_IFMA, "AVX512_IFMA"); 4897 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI, "AVX512_VBMI"); 4898 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI2, "AVX512_VBMI2"); 4899 DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VNNI, "AVX512_VNNI"); 4900 if (PrData) 4901 OS << format("<unknown flags: 0x%x>", PrData); 4902 return OS.str(); 4903 break; 4904 case GNU_PROPERTY_X86_FEATURE_2_NEEDED: 4905 case GNU_PROPERTY_X86_FEATURE_2_USED: 4906 OS << "x86 feature " 4907 << (Type == GNU_PROPERTY_X86_FEATURE_2_NEEDED ? "needed: " : "used: "); 4908 if (DataSize != 4) { 4909 OS << format("<corrupt length: 0x%x>", DataSize); 4910 return OS.str(); 4911 } 4912 PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data()); 4913 if (PrData == 0) { 4914 OS << "<None>"; 4915 return OS.str(); 4916 } 4917 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X86, "x86"); 4918 DumpBit(GNU_PROPERTY_X86_FEATURE_2_X87, "x87"); 4919 DumpBit(GNU_PROPERTY_X86_FEATURE_2_MMX, "MMX"); 4920 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XMM, "XMM"); 4921 DumpBit(GNU_PROPERTY_X86_FEATURE_2_YMM, "YMM"); 4922 DumpBit(GNU_PROPERTY_X86_FEATURE_2_ZMM, "ZMM"); 4923 DumpBit(GNU_PROPERTY_X86_FEATURE_2_FXSR, "FXSR"); 4924 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVE, "XSAVE"); 4925 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT, "XSAVEOPT"); 4926 DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEC, "XSAVEC"); 4927 if (PrData) 4928 OS << format("<unknown flags: 0x%x>", PrData); 4929 return OS.str(); 4930 } 4931 } 4932 4933 template <typename ELFT> 4934 static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) { 4935 using Elf_Word = typename ELFT::Word; 4936 4937 SmallVector<std::string, 4> Properties; 4938 while (Arr.size() >= 8) { 4939 uint32_t Type = *reinterpret_cast<const Elf_Word *>(Arr.data()); 4940 uint32_t DataSize = *reinterpret_cast<const Elf_Word *>(Arr.data() + 4); 4941 Arr = Arr.drop_front(8); 4942 4943 // Take padding size into account if present. 4944 uint64_t PaddedSize = alignTo(DataSize, sizeof(typename ELFT::uint)); 4945 std::string str; 4946 raw_string_ostream OS(str); 4947 if (Arr.size() < PaddedSize) { 4948 OS << format("<corrupt type (0x%x) datasz: 0x%x>", Type, DataSize); 4949 Properties.push_back(OS.str()); 4950 break; 4951 } 4952 Properties.push_back( 4953 getGNUProperty<ELFT>(Type, DataSize, Arr.take_front(PaddedSize))); 4954 Arr = Arr.drop_front(PaddedSize); 4955 } 4956 4957 if (!Arr.empty()) 4958 Properties.push_back("<corrupted GNU_PROPERTY_TYPE_0>"); 4959 4960 return Properties; 4961 } 4962 4963 struct GNUAbiTag { 4964 std::string OSName; 4965 std::string ABI; 4966 bool IsValid; 4967 }; 4968 4969 template <typename ELFT> static GNUAbiTag getGNUAbiTag(ArrayRef<uint8_t> Desc) { 4970 typedef typename ELFT::Word Elf_Word; 4971 4972 ArrayRef<Elf_Word> Words(reinterpret_cast<const Elf_Word *>(Desc.begin()), 4973 reinterpret_cast<const Elf_Word *>(Desc.end())); 4974 4975 if (Words.size() < 4) 4976 return {"", "", /*IsValid=*/false}; 4977 4978 static const char *OSNames[] = { 4979 "Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable", "NaCl", 4980 }; 4981 StringRef OSName = "Unknown"; 4982 if (Words[0] < array_lengthof(OSNames)) 4983 OSName = OSNames[Words[0]]; 4984 uint32_t Major = Words[1], Minor = Words[2], Patch = Words[3]; 4985 std::string str; 4986 raw_string_ostream ABI(str); 4987 ABI << Major << "." << Minor << "." << Patch; 4988 return {std::string(OSName), ABI.str(), /*IsValid=*/true}; 4989 } 4990 4991 static std::string getGNUBuildId(ArrayRef<uint8_t> Desc) { 4992 std::string str; 4993 raw_string_ostream OS(str); 4994 for (const auto &B : Desc) 4995 OS << format_hex_no_prefix(B, 2); 4996 return OS.str(); 4997 } 4998 4999 static StringRef getGNUGoldVersion(ArrayRef<uint8_t> Desc) { 5000 return StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5001 } 5002 5003 template <typename ELFT> 5004 static void printGNUNote(raw_ostream &OS, uint32_t NoteType, 5005 ArrayRef<uint8_t> Desc) { 5006 switch (NoteType) { 5007 default: 5008 return; 5009 case ELF::NT_GNU_ABI_TAG: { 5010 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 5011 if (!AbiTag.IsValid) 5012 OS << " <corrupt GNU_ABI_TAG>"; 5013 else 5014 OS << " OS: " << AbiTag.OSName << ", ABI: " << AbiTag.ABI; 5015 break; 5016 } 5017 case ELF::NT_GNU_BUILD_ID: { 5018 OS << " Build ID: " << getGNUBuildId(Desc); 5019 break; 5020 } 5021 case ELF::NT_GNU_GOLD_VERSION: 5022 OS << " Version: " << getGNUGoldVersion(Desc); 5023 break; 5024 case ELF::NT_GNU_PROPERTY_TYPE_0: 5025 OS << " Properties:"; 5026 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 5027 OS << " " << Property << "\n"; 5028 break; 5029 } 5030 OS << '\n'; 5031 } 5032 5033 struct AMDNote { 5034 std::string Type; 5035 std::string Value; 5036 }; 5037 5038 template <typename ELFT> 5039 static AMDNote getAMDNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5040 switch (NoteType) { 5041 default: 5042 return {"", ""}; 5043 case ELF::NT_AMD_AMDGPU_HSA_METADATA: 5044 return { 5045 "HSA Metadata", 5046 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5047 case ELF::NT_AMD_AMDGPU_ISA: 5048 return { 5049 "ISA Version", 5050 std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())}; 5051 } 5052 } 5053 5054 struct AMDGPUNote { 5055 std::string Type; 5056 std::string Value; 5057 }; 5058 5059 template <typename ELFT> 5060 static AMDGPUNote getAMDGPUNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) { 5061 switch (NoteType) { 5062 default: 5063 return {"", ""}; 5064 case ELF::NT_AMDGPU_METADATA: { 5065 auto MsgPackString = 5066 StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size()); 5067 msgpack::Document MsgPackDoc; 5068 if (!MsgPackDoc.readFromBlob(MsgPackString, /*Multi=*/false)) 5069 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5070 5071 AMDGPU::HSAMD::V3::MetadataVerifier Verifier(true); 5072 if (!Verifier.verify(MsgPackDoc.getRoot())) 5073 return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"}; 5074 5075 std::string HSAMetadataString; 5076 raw_string_ostream StrOS(HSAMetadataString); 5077 MsgPackDoc.toYAML(StrOS); 5078 5079 return {"AMDGPU Metadata", StrOS.str()}; 5080 } 5081 } 5082 } 5083 5084 struct CoreFileMapping { 5085 uint64_t Start, End, Offset; 5086 StringRef Filename; 5087 }; 5088 5089 struct CoreNote { 5090 uint64_t PageSize; 5091 std::vector<CoreFileMapping> Mappings; 5092 }; 5093 5094 static Expected<CoreNote> readCoreNote(DataExtractor Desc) { 5095 // Expected format of the NT_FILE note description: 5096 // 1. # of file mappings (call it N) 5097 // 2. Page size 5098 // 3. N (start, end, offset) triples 5099 // 4. N packed filenames (null delimited) 5100 // Each field is an Elf_Addr, except for filenames which are char* strings. 5101 5102 CoreNote Ret; 5103 const int Bytes = Desc.getAddressSize(); 5104 5105 if (!Desc.isValidOffsetForAddress(2)) 5106 return createStringError(object_error::parse_failed, 5107 "malformed note: header too short"); 5108 if (Desc.getData().back() != 0) 5109 return createStringError(object_error::parse_failed, 5110 "malformed note: not NUL terminated"); 5111 5112 uint64_t DescOffset = 0; 5113 uint64_t FileCount = Desc.getAddress(&DescOffset); 5114 Ret.PageSize = Desc.getAddress(&DescOffset); 5115 5116 if (!Desc.isValidOffsetForAddress(3 * FileCount * Bytes)) 5117 return createStringError(object_error::parse_failed, 5118 "malformed note: too short for number of files"); 5119 5120 uint64_t FilenamesOffset = 0; 5121 DataExtractor Filenames( 5122 Desc.getData().drop_front(DescOffset + 3 * FileCount * Bytes), 5123 Desc.isLittleEndian(), Desc.getAddressSize()); 5124 5125 Ret.Mappings.resize(FileCount); 5126 for (CoreFileMapping &Mapping : Ret.Mappings) { 5127 if (!Filenames.isValidOffsetForDataOfSize(FilenamesOffset, 1)) 5128 return createStringError(object_error::parse_failed, 5129 "malformed note: too few filenames"); 5130 Mapping.Start = Desc.getAddress(&DescOffset); 5131 Mapping.End = Desc.getAddress(&DescOffset); 5132 Mapping.Offset = Desc.getAddress(&DescOffset); 5133 Mapping.Filename = Filenames.getCStrRef(&FilenamesOffset); 5134 } 5135 5136 return Ret; 5137 } 5138 5139 template <typename ELFT> 5140 static void printCoreNote(raw_ostream &OS, const CoreNote &Note) { 5141 // Length of "0x<address>" string. 5142 const int FieldWidth = ELFT::Is64Bits ? 18 : 10; 5143 5144 OS << " Page size: " << format_decimal(Note.PageSize, 0) << '\n'; 5145 OS << " " << right_justify("Start", FieldWidth) << " " 5146 << right_justify("End", FieldWidth) << " " 5147 << right_justify("Page Offset", FieldWidth) << '\n'; 5148 for (const CoreFileMapping &Mapping : Note.Mappings) { 5149 OS << " " << format_hex(Mapping.Start, FieldWidth) << " " 5150 << format_hex(Mapping.End, FieldWidth) << " " 5151 << format_hex(Mapping.Offset, FieldWidth) << "\n " 5152 << Mapping.Filename << '\n'; 5153 } 5154 } 5155 5156 template <class ELFT> 5157 void GNUStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 5158 auto PrintHeader = [&](Optional<StringRef> SecName, 5159 const typename ELFT::Off Offset, 5160 const typename ELFT::Addr Size) { 5161 OS << "Displaying notes found "; 5162 5163 if (SecName) 5164 OS << "in: " << *SecName << "\n"; 5165 else 5166 OS << "at file offset " << format_hex(Offset, 10) << " with length " 5167 << format_hex(Size, 10) << ":\n"; 5168 5169 OS << " Owner Data size \tDescription\n"; 5170 }; 5171 5172 auto ProcessNote = [&](const Elf_Note &Note) { 5173 StringRef Name = Note.getName(); 5174 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 5175 Elf_Word Type = Note.getType(); 5176 5177 // Print the note owner/type. 5178 OS << " " << left_justify(Name, 20) << ' ' 5179 << format_hex(Descriptor.size(), 10) << '\t'; 5180 if (Name == "GNU") { 5181 OS << getGNUNoteTypeName(Type) << '\n'; 5182 } else if (Name == "FreeBSD") { 5183 OS << getFreeBSDNoteTypeName(Type) << '\n'; 5184 } else if (Name == "AMD") { 5185 OS << getAMDNoteTypeName(Type) << '\n'; 5186 } else if (Name == "AMDGPU") { 5187 OS << getAMDGPUNoteTypeName(Type) << '\n'; 5188 } else { 5189 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 5190 ? getCoreNoteTypeName(Type) 5191 : getGenericNoteTypeName(Type); 5192 if (!NoteType.empty()) 5193 OS << NoteType << '\n'; 5194 else 5195 OS << "Unknown note type: (" << format_hex(Type, 10) << ")\n"; 5196 } 5197 5198 // Print the description, or fallback to printing raw bytes for unknown 5199 // owners. 5200 if (Name == "GNU") { 5201 printGNUNote<ELFT>(OS, Type, Descriptor); 5202 } else if (Name == "AMD") { 5203 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 5204 if (!N.Type.empty()) 5205 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5206 } else if (Name == "AMDGPU") { 5207 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 5208 if (!N.Type.empty()) 5209 OS << " " << N.Type << ":\n " << N.Value << '\n'; 5210 } else if (Name == "CORE") { 5211 if (Type == ELF::NT_FILE) { 5212 DataExtractor DescExtractor(Descriptor, 5213 ELFT::TargetEndianness == support::little, 5214 sizeof(Elf_Addr)); 5215 Expected<CoreNote> Note = readCoreNote(DescExtractor); 5216 if (Note) 5217 printCoreNote<ELFT>(OS, *Note); 5218 else 5219 reportWarning(Note.takeError(), this->FileName); 5220 } 5221 } else if (!Descriptor.empty()) { 5222 OS << " description data:"; 5223 for (uint8_t B : Descriptor) 5224 OS << " " << format("%02x", B); 5225 OS << '\n'; 5226 } 5227 }; 5228 5229 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 5230 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 5231 for (const auto &S : Sections) { 5232 if (S.sh_type != SHT_NOTE) 5233 continue; 5234 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 5235 S.sh_size); 5236 Error Err = Error::success(); 5237 for (auto Note : Obj->notes(S, Err)) 5238 ProcessNote(Note); 5239 if (Err) 5240 reportError(std::move(Err), this->FileName); 5241 } 5242 } else { 5243 for (const auto &P : 5244 unwrapOrError(this->FileName, Obj->program_headers())) { 5245 if (P.p_type != PT_NOTE) 5246 continue; 5247 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 5248 Error Err = Error::success(); 5249 for (auto Note : Obj->notes(P, Err)) 5250 ProcessNote(Note); 5251 if (Err) 5252 reportError(std::move(Err), this->FileName); 5253 } 5254 } 5255 } 5256 5257 template <class ELFT> 5258 void GNUStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 5259 OS << "printELFLinkerOptions not implemented!\n"; 5260 } 5261 5262 template <class ELFT> 5263 void GNUStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 5264 OS << "printDependentLibs not implemented!\n"; 5265 } 5266 5267 // Used for printing section names in places where possible errors can be 5268 // ignored. 5269 static StringRef getSectionName(const SectionRef &Sec) { 5270 Expected<StringRef> NameOrErr = Sec.getName(); 5271 if (NameOrErr) 5272 return *NameOrErr; 5273 consumeError(NameOrErr.takeError()); 5274 return "<?>"; 5275 } 5276 5277 // Used for printing symbol names in places where possible errors can be 5278 // ignored. 5279 static std::string getSymbolName(const ELFSymbolRef &Sym) { 5280 Expected<StringRef> NameOrErr = Sym.getName(); 5281 if (NameOrErr) 5282 return maybeDemangle(*NameOrErr); 5283 consumeError(NameOrErr.takeError()); 5284 return "<?>"; 5285 } 5286 5287 template <class ELFT> 5288 void DumpStyle<ELFT>::printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, 5289 uint64_t SymValue, 5290 Optional<SectionRef> FunctionSec, 5291 const StringRef SectionName, 5292 DataExtractor Data, 5293 uint64_t *Offset) { 5294 // This function ignores potentially erroneous input, unless it is directly 5295 // related to stack size reporting. 5296 SymbolRef FuncSym; 5297 for (const ELFSymbolRef &Symbol : Obj->symbols()) { 5298 Expected<uint64_t> SymAddrOrErr = Symbol.getAddress(); 5299 if (!SymAddrOrErr) { 5300 consumeError(SymAddrOrErr.takeError()); 5301 continue; 5302 } 5303 if (Expected<uint32_t> SymFlags = Symbol.getFlags()) { 5304 if (*SymFlags & SymbolRef::SF_Undefined) 5305 continue; 5306 } else 5307 consumeError(SymFlags.takeError()); 5308 if (Symbol.getELFType() == ELF::STT_FUNC && *SymAddrOrErr == SymValue) { 5309 // Check if the symbol is in the right section. FunctionSec == None means 5310 // "any section". 5311 if (!FunctionSec || FunctionSec->containsSymbol(Symbol)) { 5312 FuncSym = Symbol; 5313 break; 5314 } 5315 } 5316 } 5317 5318 std::string FuncName = "?"; 5319 // A valid SymbolRef has a non-null object file pointer. 5320 if (FuncSym.BasicSymbolRef::getObject()) 5321 FuncName = getSymbolName(FuncSym); 5322 else 5323 reportWarning( 5324 createError("could not identify function symbol for stack size entry"), 5325 Obj->getFileName()); 5326 5327 // Extract the size. The expectation is that Offset is pointing to the right 5328 // place, i.e. past the function address. 5329 uint64_t PrevOffset = *Offset; 5330 uint64_t StackSize = Data.getULEB128(Offset); 5331 // getULEB128() does not advance Offset if it is not able to extract a valid 5332 // integer. 5333 if (*Offset == PrevOffset) 5334 reportError( 5335 createStringError(object_error::parse_failed, 5336 "could not extract a valid stack size in section %s", 5337 SectionName.data()), 5338 Obj->getFileName()); 5339 5340 printStackSizeEntry(StackSize, FuncName); 5341 } 5342 5343 template <class ELFT> 5344 void GNUStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 5345 OS.PadToColumn(2); 5346 OS << format_decimal(Size, 11); 5347 OS.PadToColumn(18); 5348 OS << FuncName << "\n"; 5349 } 5350 5351 template <class ELFT> 5352 void DumpStyle<ELFT>::printStackSize(const ELFObjectFile<ELFT> *Obj, 5353 RelocationRef Reloc, 5354 SectionRef FunctionSec, 5355 const StringRef &StackSizeSectionName, 5356 const RelocationResolver &Resolver, 5357 DataExtractor Data) { 5358 // This function ignores potentially erroneous input, unless it is directly 5359 // related to stack size reporting. 5360 object::symbol_iterator RelocSym = Reloc.getSymbol(); 5361 uint64_t RelocSymValue = 0; 5362 StringRef FileStr = Obj->getFileName(); 5363 if (RelocSym != Obj->symbol_end()) { 5364 // Ensure that the relocation symbol is in the function section, i.e. the 5365 // section where the functions whose stack sizes we are reporting are 5366 // located. 5367 auto SectionOrErr = RelocSym->getSection(); 5368 if (!SectionOrErr) { 5369 reportWarning( 5370 createError("cannot identify the section for relocation symbol '" + 5371 getSymbolName(*RelocSym) + "'"), 5372 FileStr); 5373 consumeError(SectionOrErr.takeError()); 5374 } else if (*SectionOrErr != FunctionSec) { 5375 reportWarning(createError("relocation symbol '" + 5376 getSymbolName(*RelocSym) + 5377 "' is not in the expected section"), 5378 FileStr); 5379 // Pretend that the symbol is in the correct section and report its 5380 // stack size anyway. 5381 FunctionSec = **SectionOrErr; 5382 } 5383 5384 Expected<uint64_t> RelocSymValueOrErr = RelocSym->getValue(); 5385 if (RelocSymValueOrErr) 5386 RelocSymValue = *RelocSymValueOrErr; 5387 else 5388 consumeError(RelocSymValueOrErr.takeError()); 5389 } 5390 5391 uint64_t Offset = Reloc.getOffset(); 5392 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) 5393 reportError( 5394 createStringError(object_error::parse_failed, 5395 "found invalid relocation offset into section %s " 5396 "while trying to extract a stack size entry", 5397 StackSizeSectionName.data()), 5398 FileStr); 5399 5400 uint64_t Addend = Data.getAddress(&Offset); 5401 uint64_t SymValue = Resolver(Reloc, RelocSymValue, Addend); 5402 this->printFunctionStackSize(Obj, SymValue, FunctionSec, StackSizeSectionName, 5403 Data, &Offset); 5404 } 5405 5406 template <class ELFT> 5407 void DumpStyle<ELFT>::printNonRelocatableStackSizes( 5408 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5409 // This function ignores potentially erroneous input, unless it is directly 5410 // related to stack size reporting. 5411 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5412 StringRef FileStr = Obj->getFileName(); 5413 for (const SectionRef &Sec : Obj->sections()) { 5414 StringRef SectionName = getSectionName(Sec); 5415 if (SectionName != ".stack_sizes") 5416 continue; 5417 PrintHeader(); 5418 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5419 ArrayRef<uint8_t> Contents = 5420 unwrapOrError(this->FileName, EF->getSectionContents(ElfSec)); 5421 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5422 uint64_t Offset = 0; 5423 while (Offset < Contents.size()) { 5424 // The function address is followed by a ULEB representing the stack 5425 // size. Check for an extra byte before we try to process the entry. 5426 if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) { 5427 reportError( 5428 createStringError( 5429 object_error::parse_failed, 5430 "section %s ended while trying to extract a stack size entry", 5431 SectionName.data()), 5432 FileStr); 5433 } 5434 uint64_t SymValue = Data.getAddress(&Offset); 5435 printFunctionStackSize(Obj, SymValue, /*FunctionSec=*/None, SectionName, 5436 Data, &Offset); 5437 } 5438 } 5439 } 5440 5441 template <class ELFT> 5442 void DumpStyle<ELFT>::printRelocatableStackSizes( 5443 const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) { 5444 const ELFFile<ELFT> *EF = Obj->getELFFile(); 5445 5446 // Build a map between stack size sections and their corresponding relocation 5447 // sections. 5448 llvm::MapVector<SectionRef, SectionRef> StackSizeRelocMap; 5449 const SectionRef NullSection{}; 5450 5451 for (const SectionRef &Sec : Obj->sections()) { 5452 StringRef SectionName; 5453 if (Expected<StringRef> NameOrErr = Sec.getName()) 5454 SectionName = *NameOrErr; 5455 else 5456 consumeError(NameOrErr.takeError()); 5457 5458 // A stack size section that we haven't encountered yet is mapped to the 5459 // null section until we find its corresponding relocation section. 5460 if (SectionName == ".stack_sizes") 5461 if (StackSizeRelocMap.count(Sec) == 0) { 5462 StackSizeRelocMap[Sec] = NullSection; 5463 continue; 5464 } 5465 5466 // Check relocation sections if they are relocating contents of a 5467 // stack sizes section. 5468 const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl()); 5469 uint32_t SectionType = ElfSec->sh_type; 5470 if (SectionType != ELF::SHT_RELA && SectionType != ELF::SHT_REL) 5471 continue; 5472 5473 Expected<section_iterator> RelSecOrErr = Sec.getRelocatedSection(); 5474 if (!RelSecOrErr) 5475 reportError(createStringError(object_error::parse_failed, 5476 "%s: failed to get a relocated section: %s", 5477 SectionName.data(), 5478 toString(RelSecOrErr.takeError()).c_str()), 5479 Obj->getFileName()); 5480 5481 const Elf_Shdr *ContentsSec = 5482 Obj->getSection((*RelSecOrErr)->getRawDataRefImpl()); 5483 Expected<StringRef> ContentsSectionNameOrErr = 5484 EF->getSectionName(ContentsSec); 5485 if (!ContentsSectionNameOrErr) { 5486 consumeError(ContentsSectionNameOrErr.takeError()); 5487 continue; 5488 } 5489 if (*ContentsSectionNameOrErr != ".stack_sizes") 5490 continue; 5491 // Insert a mapping from the stack sizes section to its relocation section. 5492 StackSizeRelocMap[Obj->toSectionRef(ContentsSec)] = Sec; 5493 } 5494 5495 for (const auto &StackSizeMapEntry : StackSizeRelocMap) { 5496 PrintHeader(); 5497 const SectionRef &StackSizesSec = StackSizeMapEntry.first; 5498 const SectionRef &RelocSec = StackSizeMapEntry.second; 5499 5500 // Warn about stack size sections without a relocation section. 5501 StringRef StackSizeSectionName = getSectionName(StackSizesSec); 5502 if (RelocSec == NullSection) { 5503 reportWarning(createError("section " + StackSizeSectionName + 5504 " does not have a corresponding " 5505 "relocation section"), 5506 Obj->getFileName()); 5507 continue; 5508 } 5509 5510 // A .stack_sizes section header's sh_link field is supposed to point 5511 // to the section that contains the functions whose stack sizes are 5512 // described in it. 5513 const Elf_Shdr *StackSizesELFSec = 5514 Obj->getSection(StackSizesSec.getRawDataRefImpl()); 5515 const SectionRef FunctionSec = Obj->toSectionRef(unwrapOrError( 5516 this->FileName, EF->getSection(StackSizesELFSec->sh_link))); 5517 5518 bool (*IsSupportedFn)(uint64_t); 5519 RelocationResolver Resolver; 5520 std::tie(IsSupportedFn, Resolver) = getRelocationResolver(*Obj); 5521 auto Contents = unwrapOrError(this->FileName, StackSizesSec.getContents()); 5522 DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr)); 5523 for (const RelocationRef &Reloc : RelocSec.relocations()) { 5524 if (!IsSupportedFn || !IsSupportedFn(Reloc.getType())) 5525 reportError(createStringError( 5526 object_error::parse_failed, 5527 "unsupported relocation type in section %s: %s", 5528 getSectionName(RelocSec).data(), 5529 EF->getRelocationTypeName(Reloc.getType()).data()), 5530 Obj->getFileName()); 5531 this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName, 5532 Resolver, Data); 5533 } 5534 } 5535 } 5536 5537 template <class ELFT> 5538 void GNUStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 5539 bool HeaderHasBeenPrinted = false; 5540 auto PrintHeader = [&]() { 5541 if (HeaderHasBeenPrinted) 5542 return; 5543 OS << "\nStack Sizes:\n"; 5544 OS.PadToColumn(9); 5545 OS << "Size"; 5546 OS.PadToColumn(18); 5547 OS << "Function\n"; 5548 HeaderHasBeenPrinted = true; 5549 }; 5550 5551 // For non-relocatable objects, look directly for sections whose name starts 5552 // with .stack_sizes and process the contents. 5553 if (Obj->isRelocatableObject()) 5554 this->printRelocatableStackSizes(Obj, PrintHeader); 5555 else 5556 this->printNonRelocatableStackSizes(Obj, PrintHeader); 5557 } 5558 5559 template <class ELFT> 5560 void GNUStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 5561 size_t Bias = ELFT::Is64Bits ? 8 : 0; 5562 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 5563 OS.PadToColumn(2); 5564 OS << format_hex_no_prefix(Parser.getGotAddress(E), 8 + Bias); 5565 OS.PadToColumn(11 + Bias); 5566 OS << format_decimal(Parser.getGotOffset(E), 6) << "(gp)"; 5567 OS.PadToColumn(22 + Bias); 5568 OS << format_hex_no_prefix(*E, 8 + Bias); 5569 OS.PadToColumn(31 + 2 * Bias); 5570 OS << Purpose << "\n"; 5571 }; 5572 5573 OS << (Parser.IsStatic ? "Static GOT:\n" : "Primary GOT:\n"); 5574 OS << " Canonical gp value: " 5575 << format_hex_no_prefix(Parser.getGp(), 8 + Bias) << "\n\n"; 5576 5577 OS << " Reserved entries:\n"; 5578 if (ELFT::Is64Bits) 5579 OS << " Address Access Initial Purpose\n"; 5580 else 5581 OS << " Address Access Initial Purpose\n"; 5582 PrintEntry(Parser.getGotLazyResolver(), "Lazy resolver"); 5583 if (Parser.getGotModulePointer()) 5584 PrintEntry(Parser.getGotModulePointer(), "Module pointer (GNU extension)"); 5585 5586 if (!Parser.getLocalEntries().empty()) { 5587 OS << "\n"; 5588 OS << " Local entries:\n"; 5589 if (ELFT::Is64Bits) 5590 OS << " Address Access Initial\n"; 5591 else 5592 OS << " Address Access Initial\n"; 5593 for (auto &E : Parser.getLocalEntries()) 5594 PrintEntry(&E, ""); 5595 } 5596 5597 if (Parser.IsStatic) 5598 return; 5599 5600 if (!Parser.getGlobalEntries().empty()) { 5601 OS << "\n"; 5602 OS << " Global entries:\n"; 5603 if (ELFT::Is64Bits) 5604 OS << " Address Access Initial Sym.Val." 5605 << " Type Ndx Name\n"; 5606 else 5607 OS << " Address Access Initial Sym.Val. Type Ndx Name\n"; 5608 for (auto &E : Parser.getGlobalEntries()) { 5609 const Elf_Sym *Sym = Parser.getGotSym(&E); 5610 std::string SymName = this->dumper()->getFullSymbolName( 5611 Sym, this->dumper()->getDynamicStringTable(), false); 5612 5613 OS.PadToColumn(2); 5614 OS << to_string(format_hex_no_prefix(Parser.getGotAddress(&E), 8 + Bias)); 5615 OS.PadToColumn(11 + Bias); 5616 OS << to_string(format_decimal(Parser.getGotOffset(&E), 6)) + "(gp)"; 5617 OS.PadToColumn(22 + Bias); 5618 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5619 OS.PadToColumn(31 + 2 * Bias); 5620 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5621 OS.PadToColumn(40 + 3 * Bias); 5622 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5623 OS.PadToColumn(48 + 3 * Bias); 5624 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5625 this->dumper()->dynamic_symbols().begin()); 5626 OS.PadToColumn(52 + 3 * Bias); 5627 OS << SymName << "\n"; 5628 } 5629 } 5630 5631 if (!Parser.getOtherEntries().empty()) 5632 OS << "\n Number of TLS and multi-GOT entries " 5633 << Parser.getOtherEntries().size() << "\n"; 5634 } 5635 5636 template <class ELFT> 5637 void GNUStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 5638 size_t Bias = ELFT::Is64Bits ? 8 : 0; 5639 auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) { 5640 OS.PadToColumn(2); 5641 OS << format_hex_no_prefix(Parser.getPltAddress(E), 8 + Bias); 5642 OS.PadToColumn(11 + Bias); 5643 OS << format_hex_no_prefix(*E, 8 + Bias); 5644 OS.PadToColumn(20 + 2 * Bias); 5645 OS << Purpose << "\n"; 5646 }; 5647 5648 OS << "PLT GOT:\n\n"; 5649 5650 OS << " Reserved entries:\n"; 5651 OS << " Address Initial Purpose\n"; 5652 PrintEntry(Parser.getPltLazyResolver(), "PLT lazy resolver"); 5653 if (Parser.getPltModulePointer()) 5654 PrintEntry(Parser.getPltModulePointer(), "Module pointer"); 5655 5656 if (!Parser.getPltEntries().empty()) { 5657 OS << "\n"; 5658 OS << " Entries:\n"; 5659 OS << " Address Initial Sym.Val. Type Ndx Name\n"; 5660 for (auto &E : Parser.getPltEntries()) { 5661 const Elf_Sym *Sym = Parser.getPltSym(&E); 5662 std::string SymName = this->dumper()->getFullSymbolName( 5663 Sym, this->dumper()->getDynamicStringTable(), false); 5664 5665 OS.PadToColumn(2); 5666 OS << to_string(format_hex_no_prefix(Parser.getPltAddress(&E), 8 + Bias)); 5667 OS.PadToColumn(11 + Bias); 5668 OS << to_string(format_hex_no_prefix(E, 8 + Bias)); 5669 OS.PadToColumn(20 + 2 * Bias); 5670 OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias)); 5671 OS.PadToColumn(29 + 3 * Bias); 5672 OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes)); 5673 OS.PadToColumn(37 + 3 * Bias); 5674 OS << getSymbolSectionNdx(Parser.Obj, Sym, 5675 this->dumper()->dynamic_symbols().begin()); 5676 OS.PadToColumn(41 + 3 * Bias); 5677 OS << SymName << "\n"; 5678 } 5679 } 5680 } 5681 5682 template <class ELFT> 5683 void GNUStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 5684 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 5685 const Elf_Shdr *Shdr = 5686 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 5687 if (!Shdr) 5688 return; 5689 5690 ArrayRef<uint8_t> Sec = 5691 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 5692 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) 5693 reportError(createError(".MIPS.abiflags section has a wrong size"), 5694 ObjF->getFileName()); 5695 5696 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 5697 5698 OS << "MIPS ABI Flags Version: " << Flags->version << "\n\n"; 5699 OS << "ISA: MIPS" << int(Flags->isa_level); 5700 if (Flags->isa_rev > 1) 5701 OS << "r" << int(Flags->isa_rev); 5702 OS << "\n"; 5703 OS << "GPR size: " << getMipsRegisterSize(Flags->gpr_size) << "\n"; 5704 OS << "CPR1 size: " << getMipsRegisterSize(Flags->cpr1_size) << "\n"; 5705 OS << "CPR2 size: " << getMipsRegisterSize(Flags->cpr2_size) << "\n"; 5706 OS << "FP ABI: " << printEnum(Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)) 5707 << "\n"; 5708 OS << "ISA Extension: " 5709 << printEnum(Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)) << "\n"; 5710 if (Flags->ases == 0) 5711 OS << "ASEs: None\n"; 5712 else 5713 // FIXME: Print each flag on a separate line. 5714 OS << "ASEs: " << printFlags(Flags->ases, makeArrayRef(ElfMipsASEFlags)) 5715 << "\n"; 5716 OS << "FLAGS 1: " << format_hex_no_prefix(Flags->flags1, 8, false) << "\n"; 5717 OS << "FLAGS 2: " << format_hex_no_prefix(Flags->flags2, 8, false) << "\n"; 5718 OS << "\n"; 5719 } 5720 5721 template <class ELFT> void LLVMStyle<ELFT>::printFileHeaders(const ELFO *Obj) { 5722 const Elf_Ehdr *E = Obj->getHeader(); 5723 { 5724 DictScope D(W, "ElfHeader"); 5725 { 5726 DictScope D(W, "Ident"); 5727 W.printBinary("Magic", makeArrayRef(E->e_ident).slice(ELF::EI_MAG0, 4)); 5728 W.printEnum("Class", E->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass)); 5729 W.printEnum("DataEncoding", E->e_ident[ELF::EI_DATA], 5730 makeArrayRef(ElfDataEncoding)); 5731 W.printNumber("FileVersion", E->e_ident[ELF::EI_VERSION]); 5732 5733 auto OSABI = makeArrayRef(ElfOSABI); 5734 if (E->e_ident[ELF::EI_OSABI] >= ELF::ELFOSABI_FIRST_ARCH && 5735 E->e_ident[ELF::EI_OSABI] <= ELF::ELFOSABI_LAST_ARCH) { 5736 switch (E->e_machine) { 5737 case ELF::EM_AMDGPU: 5738 OSABI = makeArrayRef(AMDGPUElfOSABI); 5739 break; 5740 case ELF::EM_ARM: 5741 OSABI = makeArrayRef(ARMElfOSABI); 5742 break; 5743 case ELF::EM_TI_C6000: 5744 OSABI = makeArrayRef(C6000ElfOSABI); 5745 break; 5746 } 5747 } 5748 W.printEnum("OS/ABI", E->e_ident[ELF::EI_OSABI], OSABI); 5749 W.printNumber("ABIVersion", E->e_ident[ELF::EI_ABIVERSION]); 5750 W.printBinary("Unused", makeArrayRef(E->e_ident).slice(ELF::EI_PAD)); 5751 } 5752 5753 W.printEnum("Type", E->e_type, makeArrayRef(ElfObjectFileType)); 5754 W.printEnum("Machine", E->e_machine, makeArrayRef(ElfMachineType)); 5755 W.printNumber("Version", E->e_version); 5756 W.printHex("Entry", E->e_entry); 5757 W.printHex("ProgramHeaderOffset", E->e_phoff); 5758 W.printHex("SectionHeaderOffset", E->e_shoff); 5759 if (E->e_machine == EM_MIPS) 5760 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderMipsFlags), 5761 unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI), 5762 unsigned(ELF::EF_MIPS_MACH)); 5763 else if (E->e_machine == EM_AMDGPU) 5764 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderAMDGPUFlags), 5765 unsigned(ELF::EF_AMDGPU_MACH)); 5766 else if (E->e_machine == EM_RISCV) 5767 W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderRISCVFlags)); 5768 else 5769 W.printFlags("Flags", E->e_flags); 5770 W.printNumber("HeaderSize", E->e_ehsize); 5771 W.printNumber("ProgramHeaderEntrySize", E->e_phentsize); 5772 W.printNumber("ProgramHeaderCount", E->e_phnum); 5773 W.printNumber("SectionHeaderEntrySize", E->e_shentsize); 5774 W.printString("SectionHeaderCount", 5775 getSectionHeadersNumString(Obj, this->FileName)); 5776 W.printString("StringTableSectionIndex", 5777 getSectionHeaderTableIndexString(Obj, this->FileName)); 5778 } 5779 } 5780 5781 template <class ELFT> 5782 void LLVMStyle<ELFT>::printGroupSections(const ELFO *Obj) { 5783 DictScope Lists(W, "Groups"); 5784 std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName); 5785 DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V); 5786 for (const GroupSection &G : V) { 5787 DictScope D(W, "Group"); 5788 W.printNumber("Name", G.Name, G.ShName); 5789 W.printNumber("Index", G.Index); 5790 W.printNumber("Link", G.Link); 5791 W.printNumber("Info", G.Info); 5792 W.printHex("Type", getGroupType(G.Type), G.Type); 5793 W.startLine() << "Signature: " << G.Signature << "\n"; 5794 5795 ListScope L(W, "Section(s) in group"); 5796 for (const GroupMember &GM : G.Members) { 5797 const GroupSection *MainGroup = Map[GM.Index]; 5798 if (MainGroup != &G) { 5799 W.flush(); 5800 errs() << "Error: " << GM.Name << " (" << GM.Index 5801 << ") in a group " + G.Name + " (" << G.Index 5802 << ") is already in a group " + MainGroup->Name + " (" 5803 << MainGroup->Index << ")\n"; 5804 errs().flush(); 5805 continue; 5806 } 5807 W.startLine() << GM.Name << " (" << GM.Index << ")\n"; 5808 } 5809 } 5810 5811 if (V.empty()) 5812 W.startLine() << "There are no group sections in the file.\n"; 5813 } 5814 5815 template <class ELFT> void LLVMStyle<ELFT>::printRelocations(const ELFO *Obj) { 5816 ListScope D(W, "Relocations"); 5817 5818 int SectionNumber = -1; 5819 for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) { 5820 ++SectionNumber; 5821 5822 if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA && 5823 Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL && 5824 Sec.sh_type != ELF::SHT_ANDROID_RELA && 5825 Sec.sh_type != ELF::SHT_ANDROID_RELR) 5826 continue; 5827 5828 StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec)); 5829 5830 W.startLine() << "Section (" << SectionNumber << ") " << Name << " {\n"; 5831 W.indent(); 5832 5833 printRelocations(&Sec, Obj); 5834 5835 W.unindent(); 5836 W.startLine() << "}\n"; 5837 } 5838 } 5839 5840 template <class ELFT> 5841 void LLVMStyle<ELFT>::printRelocations(const Elf_Shdr *Sec, const ELFO *Obj) { 5842 const Elf_Shdr *SymTab = 5843 unwrapOrError(this->FileName, Obj->getSection(Sec->sh_link)); 5844 unsigned SecNdx = Sec - &cantFail(Obj->sections()).front(); 5845 unsigned RelNdx = 0; 5846 5847 switch (Sec->sh_type) { 5848 case ELF::SHT_REL: 5849 for (const Elf_Rel &R : unwrapOrError(this->FileName, Obj->rels(Sec))) { 5850 Elf_Rela Rela; 5851 Rela.r_offset = R.r_offset; 5852 Rela.r_info = R.r_info; 5853 Rela.r_addend = 0; 5854 printRelocation(Obj, SecNdx, Rela, ++RelNdx, SymTab); 5855 } 5856 break; 5857 case ELF::SHT_RELA: 5858 for (const Elf_Rela &R : unwrapOrError(this->FileName, Obj->relas(Sec))) 5859 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 5860 break; 5861 case ELF::SHT_RELR: 5862 case ELF::SHT_ANDROID_RELR: { 5863 Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(Sec)); 5864 if (opts::RawRelr) { 5865 for (const Elf_Relr &R : Relrs) 5866 W.startLine() << W.hex(R) << "\n"; 5867 } else { 5868 std::vector<Elf_Rela> RelrRelas = 5869 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 5870 for (const Elf_Rela &R : RelrRelas) 5871 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 5872 } 5873 break; 5874 } 5875 case ELF::SHT_ANDROID_REL: 5876 case ELF::SHT_ANDROID_RELA: 5877 for (const Elf_Rela &R : 5878 unwrapOrError(this->FileName, Obj->android_relas(Sec))) 5879 printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab); 5880 break; 5881 } 5882 } 5883 5884 template <class ELFT> 5885 void LLVMStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex, 5886 Elf_Rela Rel, unsigned RelIndex, 5887 const Elf_Shdr *SymTab) { 5888 Expected<std::pair<const typename ELFT::Sym *, std::string>> Target = 5889 this->dumper()->getRelocationTarget(SymTab, Rel); 5890 if (!Target) { 5891 this->reportUniqueWarning(createError( 5892 "unable to print relocation " + Twine(RelIndex) + " in section " + 5893 Twine(SecIndex) + ": " + toString(Target.takeError()))); 5894 return; 5895 } 5896 5897 std::string TargetName = Target->second; 5898 SmallString<32> RelocName; 5899 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 5900 5901 if (opts::ExpandRelocs) { 5902 DictScope Group(W, "Relocation"); 5903 W.printHex("Offset", Rel.r_offset); 5904 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 5905 W.printNumber("Symbol", !TargetName.empty() ? TargetName : "-", 5906 Rel.getSymbol(Obj->isMips64EL())); 5907 W.printHex("Addend", Rel.r_addend); 5908 } else { 5909 raw_ostream &OS = W.startLine(); 5910 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 5911 << (!TargetName.empty() ? TargetName : "-") << " " << W.hex(Rel.r_addend) 5912 << "\n"; 5913 } 5914 } 5915 5916 template <class ELFT> 5917 void LLVMStyle<ELFT>::printSectionHeaders(const ELFO *Obj) { 5918 ListScope SectionsD(W, "Sections"); 5919 5920 int SectionIndex = -1; 5921 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 5922 std::vector<EnumEntry<unsigned>> FlagsList = 5923 getSectionFlagsForTarget(Obj->getHeader()->e_machine); 5924 for (const Elf_Shdr &Sec : Sections) { 5925 StringRef Name = "<?>"; 5926 if (Expected<StringRef> SecNameOrErr = 5927 Obj->getSectionName(&Sec, this->dumper()->WarningHandler)) 5928 Name = *SecNameOrErr; 5929 else 5930 this->reportUniqueWarning(SecNameOrErr.takeError()); 5931 5932 DictScope SectionD(W, "Section"); 5933 W.printNumber("Index", ++SectionIndex); 5934 W.printNumber("Name", Name, Sec.sh_name); 5935 W.printHex( 5936 "Type", 5937 object::getELFSectionTypeName(Obj->getHeader()->e_machine, Sec.sh_type), 5938 Sec.sh_type); 5939 W.printFlags("Flags", Sec.sh_flags, makeArrayRef(FlagsList)); 5940 W.printHex("Address", Sec.sh_addr); 5941 W.printHex("Offset", Sec.sh_offset); 5942 W.printNumber("Size", Sec.sh_size); 5943 W.printNumber("Link", Sec.sh_link); 5944 W.printNumber("Info", Sec.sh_info); 5945 W.printNumber("AddressAlignment", Sec.sh_addralign); 5946 W.printNumber("EntrySize", Sec.sh_entsize); 5947 5948 if (opts::SectionRelocations) { 5949 ListScope D(W, "Relocations"); 5950 printRelocations(&Sec, Obj); 5951 } 5952 5953 if (opts::SectionSymbols) { 5954 ListScope D(W, "Symbols"); 5955 const Elf_Shdr *Symtab = this->dumper()->getDotSymtabSec(); 5956 StringRef StrTable = 5957 unwrapOrError(this->FileName, Obj->getStringTableForSymtab(*Symtab)); 5958 5959 for (const Elf_Sym &Sym : 5960 unwrapOrError(this->FileName, Obj->symbols(Symtab))) { 5961 const Elf_Shdr *SymSec = unwrapOrError( 5962 this->FileName, 5963 Obj->getSection(&Sym, Symtab, this->dumper()->getShndxTable())); 5964 if (SymSec == &Sec) 5965 printSymbol( 5966 Obj, &Sym, 5967 unwrapOrError(this->FileName, Obj->symbols(Symtab)).begin(), 5968 StrTable, false, false); 5969 } 5970 } 5971 5972 if (opts::SectionData && Sec.sh_type != ELF::SHT_NOBITS) { 5973 ArrayRef<uint8_t> Data = 5974 unwrapOrError(this->FileName, Obj->getSectionContents(&Sec)); 5975 W.printBinaryBlock( 5976 "SectionData", 5977 StringRef(reinterpret_cast<const char *>(Data.data()), Data.size())); 5978 } 5979 } 5980 } 5981 5982 template <class ELFT> 5983 void LLVMStyle<ELFT>::printSymbolSection(const Elf_Sym *Symbol, 5984 const Elf_Sym *First) { 5985 Expected<unsigned> SectionIndex = 5986 this->dumper()->getSymbolSectionIndex(Symbol, First); 5987 if (!SectionIndex) { 5988 assert(Symbol->st_shndx == SHN_XINDEX && 5989 "getSymbolSectionIndex should only fail due to an invalid " 5990 "SHT_SYMTAB_SHNDX table/reference"); 5991 this->reportUniqueWarning(SectionIndex.takeError()); 5992 W.printHex("Section", "Reserved", SHN_XINDEX); 5993 return; 5994 } 5995 5996 Expected<StringRef> SectionName = 5997 this->dumper()->getSymbolSectionName(Symbol, *SectionIndex); 5998 if (!SectionName) { 5999 // Don't report an invalid section name if the section headers are missing. 6000 // In such situations, all sections will be "invalid". 6001 if (!this->dumper()->getElfObject()->sections().empty()) 6002 this->reportUniqueWarning(SectionName.takeError()); 6003 else 6004 consumeError(SectionName.takeError()); 6005 W.printHex("Section", "<?>", *SectionIndex); 6006 } else { 6007 W.printHex("Section", *SectionName, *SectionIndex); 6008 } 6009 } 6010 6011 template <class ELFT> 6012 void LLVMStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, 6013 const Elf_Sym *First, StringRef StrTable, 6014 bool IsDynamic, 6015 bool /*NonVisibilityBitsUsed*/) { 6016 std::string FullSymbolName = 6017 this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic); 6018 unsigned char SymbolType = Symbol->getType(); 6019 6020 DictScope D(W, "Symbol"); 6021 W.printNumber("Name", FullSymbolName, Symbol->st_name); 6022 W.printHex("Value", Symbol->st_value); 6023 W.printNumber("Size", Symbol->st_size); 6024 W.printEnum("Binding", Symbol->getBinding(), makeArrayRef(ElfSymbolBindings)); 6025 if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU && 6026 SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS) 6027 W.printEnum("Type", SymbolType, makeArrayRef(AMDGPUSymbolTypes)); 6028 else 6029 W.printEnum("Type", SymbolType, makeArrayRef(ElfSymbolTypes)); 6030 if (Symbol->st_other == 0) 6031 // Usually st_other flag is zero. Do not pollute the output 6032 // by flags enumeration in that case. 6033 W.printNumber("Other", 0); 6034 else { 6035 std::vector<EnumEntry<unsigned>> SymOtherFlags(std::begin(ElfSymOtherFlags), 6036 std::end(ElfSymOtherFlags)); 6037 if (Obj->getHeader()->e_machine == EM_MIPS) { 6038 // Someones in their infinite wisdom decided to make STO_MIPS_MIPS16 6039 // flag overlapped with other ST_MIPS_xxx flags. So consider both 6040 // cases separately. 6041 if ((Symbol->st_other & STO_MIPS_MIPS16) == STO_MIPS_MIPS16) 6042 SymOtherFlags.insert(SymOtherFlags.end(), 6043 std::begin(ElfMips16SymOtherFlags), 6044 std::end(ElfMips16SymOtherFlags)); 6045 else 6046 SymOtherFlags.insert(SymOtherFlags.end(), 6047 std::begin(ElfMipsSymOtherFlags), 6048 std::end(ElfMipsSymOtherFlags)); 6049 } 6050 W.printFlags("Other", Symbol->st_other, makeArrayRef(SymOtherFlags), 0x3u); 6051 } 6052 printSymbolSection(Symbol, First); 6053 } 6054 6055 template <class ELFT> 6056 void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols, 6057 bool PrintDynamicSymbols) { 6058 if (PrintSymbols) 6059 printSymbols(Obj); 6060 if (PrintDynamicSymbols) 6061 printDynamicSymbols(Obj); 6062 } 6063 6064 template <class ELFT> void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj) { 6065 ListScope Group(W, "Symbols"); 6066 this->dumper()->printSymbolsHelper(false); 6067 } 6068 6069 template <class ELFT> 6070 void LLVMStyle<ELFT>::printDynamicSymbols(const ELFO *Obj) { 6071 ListScope Group(W, "DynamicSymbols"); 6072 this->dumper()->printSymbolsHelper(true); 6073 } 6074 6075 template <class ELFT> void LLVMStyle<ELFT>::printDynamic(const ELFFile<ELFT> *Obj) { 6076 Elf_Dyn_Range Table = this->dumper()->dynamic_table(); 6077 if (Table.empty()) 6078 return; 6079 6080 W.startLine() << "DynamicSection [ (" << Table.size() << " entries)\n"; 6081 6082 size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table); 6083 // The "Name/Value" column should be indented from the "Type" column by N 6084 // spaces, where N = MaxTagSize - length of "Type" (4) + trailing 6085 // space (1) = -3. 6086 W.startLine() << " Tag" << std::string(ELFT::Is64Bits ? 16 : 8, ' ') 6087 << "Type" << std::string(MaxTagSize - 3, ' ') << "Name/Value\n"; 6088 6089 std::string ValueFmt = "%-" + std::to_string(MaxTagSize) + "s "; 6090 for (auto Entry : Table) { 6091 uintX_t Tag = Entry.getTag(); 6092 std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal()); 6093 W.startLine() << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10, true) 6094 << " " 6095 << format(ValueFmt.c_str(), 6096 Obj->getDynamicTagAsString(Tag).c_str()) 6097 << Value << "\n"; 6098 } 6099 W.startLine() << "]\n"; 6100 } 6101 6102 template <class ELFT> 6103 void LLVMStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) { 6104 const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion(); 6105 const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion(); 6106 const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion(); 6107 const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion(); 6108 if (DynRelRegion.Size && DynRelaRegion.Size) 6109 report_fatal_error("There are both REL and RELA dynamic relocations"); 6110 W.startLine() << "Dynamic Relocations {\n"; 6111 W.indent(); 6112 if (DynRelaRegion.Size > 0) 6113 for (const Elf_Rela &Rela : this->dumper()->dyn_relas()) 6114 printDynamicRelocation(Obj, Rela); 6115 else 6116 for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) { 6117 Elf_Rela Rela; 6118 Rela.r_offset = Rel.r_offset; 6119 Rela.r_info = Rel.r_info; 6120 Rela.r_addend = 0; 6121 printDynamicRelocation(Obj, Rela); 6122 } 6123 if (DynRelrRegion.Size > 0) { 6124 Elf_Relr_Range Relrs = this->dumper()->dyn_relrs(); 6125 std::vector<Elf_Rela> RelrRelas = 6126 unwrapOrError(this->FileName, Obj->decode_relrs(Relrs)); 6127 for (const Elf_Rela &Rela : RelrRelas) 6128 printDynamicRelocation(Obj, Rela); 6129 } 6130 if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) 6131 for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>()) 6132 printDynamicRelocation(Obj, Rela); 6133 else 6134 for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) { 6135 Elf_Rela Rela; 6136 Rela.r_offset = Rel.r_offset; 6137 Rela.r_info = Rel.r_info; 6138 Rela.r_addend = 0; 6139 printDynamicRelocation(Obj, Rela); 6140 } 6141 W.unindent(); 6142 W.startLine() << "}\n"; 6143 } 6144 6145 template <class ELFT> 6146 void LLVMStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel) { 6147 SmallString<32> RelocName; 6148 Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName); 6149 std::string SymbolName = 6150 getSymbolForReloc(Obj, this->FileName, this->dumper(), Rel).Name; 6151 6152 if (opts::ExpandRelocs) { 6153 DictScope Group(W, "Relocation"); 6154 W.printHex("Offset", Rel.r_offset); 6155 W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL())); 6156 W.printString("Symbol", !SymbolName.empty() ? SymbolName : "-"); 6157 W.printHex("Addend", Rel.r_addend); 6158 } else { 6159 raw_ostream &OS = W.startLine(); 6160 OS << W.hex(Rel.r_offset) << " " << RelocName << " " 6161 << (!SymbolName.empty() ? SymbolName : "-") << " " << W.hex(Rel.r_addend) 6162 << "\n"; 6163 } 6164 } 6165 6166 template <class ELFT> 6167 void LLVMStyle<ELFT>::printProgramHeaders( 6168 const ELFO *Obj, bool PrintProgramHeaders, 6169 cl::boolOrDefault PrintSectionMapping) { 6170 if (PrintProgramHeaders) 6171 printProgramHeaders(Obj); 6172 if (PrintSectionMapping == cl::BOU_TRUE) 6173 printSectionMapping(Obj); 6174 } 6175 6176 template <class ELFT> 6177 void LLVMStyle<ELFT>::printProgramHeaders(const ELFO *Obj) { 6178 ListScope L(W, "ProgramHeaders"); 6179 6180 for (const Elf_Phdr &Phdr : 6181 unwrapOrError(this->FileName, Obj->program_headers())) { 6182 DictScope P(W, "ProgramHeader"); 6183 W.printHex("Type", 6184 getElfSegmentType(Obj->getHeader()->e_machine, Phdr.p_type), 6185 Phdr.p_type); 6186 W.printHex("Offset", Phdr.p_offset); 6187 W.printHex("VirtualAddress", Phdr.p_vaddr); 6188 W.printHex("PhysicalAddress", Phdr.p_paddr); 6189 W.printNumber("FileSize", Phdr.p_filesz); 6190 W.printNumber("MemSize", Phdr.p_memsz); 6191 W.printFlags("Flags", Phdr.p_flags, makeArrayRef(ElfSegmentFlags)); 6192 W.printNumber("Alignment", Phdr.p_align); 6193 } 6194 } 6195 6196 template <class ELFT> 6197 void LLVMStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj, 6198 const Elf_Shdr *Sec) { 6199 ListScope SS(W, "VersionSymbols"); 6200 if (!Sec) 6201 return; 6202 6203 StringRef StrTable; 6204 ArrayRef<Elf_Sym> Syms; 6205 Expected<ArrayRef<Elf_Versym>> VerTableOrErr = 6206 this->dumper()->getVersionTable(Sec, &Syms, &StrTable); 6207 if (!VerTableOrErr) { 6208 this->reportUniqueWarning(VerTableOrErr.takeError()); 6209 return; 6210 } 6211 6212 if (StrTable.empty() || Syms.empty() || Syms.size() != VerTableOrErr->size()) 6213 return; 6214 6215 for (size_t I = 0, E = Syms.size(); I < E; ++I) { 6216 DictScope S(W, "Symbol"); 6217 W.printNumber("Version", (*VerTableOrErr)[I].vs_index & VERSYM_VERSION); 6218 W.printString("Name", this->dumper()->getFullSymbolName( 6219 &Syms[I], StrTable, /*IsDynamic=*/true)); 6220 } 6221 } 6222 6223 template <class ELFT> 6224 void LLVMStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj, 6225 const Elf_Shdr *Sec) { 6226 ListScope SD(W, "VersionDefinitions"); 6227 if (!Sec) 6228 return; 6229 6230 Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec); 6231 if (!V) { 6232 this->reportUniqueWarning(V.takeError()); 6233 return; 6234 } 6235 6236 for (const VerDef &D : *V) { 6237 DictScope Def(W, "Definition"); 6238 W.printNumber("Version", D.Version); 6239 W.printFlags("Flags", D.Flags, makeArrayRef(SymVersionFlags)); 6240 W.printNumber("Index", D.Ndx); 6241 W.printNumber("Hash", D.Hash); 6242 W.printString("Name", D.Name.c_str()); 6243 W.printList( 6244 "Predecessors", D.AuxV, 6245 [](raw_ostream &OS, const VerdAux &Aux) { OS << Aux.Name.c_str(); }); 6246 } 6247 } 6248 6249 template <class ELFT> 6250 void LLVMStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj, 6251 const Elf_Shdr *Sec) { 6252 ListScope SD(W, "VersionRequirements"); 6253 if (!Sec) 6254 return; 6255 6256 Expected<std::vector<VerNeed>> V = 6257 this->dumper()->getVersionDependencies(Sec); 6258 if (!V) { 6259 this->reportUniqueWarning(V.takeError()); 6260 return; 6261 } 6262 6263 for (const VerNeed &VN : *V) { 6264 DictScope Entry(W, "Dependency"); 6265 W.printNumber("Version", VN.Version); 6266 W.printNumber("Count", VN.Cnt); 6267 W.printString("FileName", VN.File.c_str()); 6268 6269 ListScope L(W, "Entries"); 6270 for (const VernAux &Aux : VN.AuxV) { 6271 DictScope Entry(W, "Entry"); 6272 W.printNumber("Hash", Aux.Hash); 6273 W.printFlags("Flags", Aux.Flags, makeArrayRef(SymVersionFlags)); 6274 W.printNumber("Index", Aux.Other); 6275 W.printString("Name", Aux.Name.c_str()); 6276 } 6277 } 6278 } 6279 6280 template <class ELFT> 6281 void LLVMStyle<ELFT>::printHashHistogram(const ELFFile<ELFT> *Obj) { 6282 W.startLine() << "Hash Histogram not implemented!\n"; 6283 } 6284 6285 template <class ELFT> 6286 void LLVMStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) { 6287 ListScope L(W, "CGProfile"); 6288 if (!this->dumper()->getDotCGProfileSec()) 6289 return; 6290 auto CGProfile = unwrapOrError( 6291 this->FileName, Obj->template getSectionContentsAsArray<Elf_CGProfile>( 6292 this->dumper()->getDotCGProfileSec())); 6293 for (const Elf_CGProfile &CGPE : CGProfile) { 6294 DictScope D(W, "CGProfileEntry"); 6295 W.printNumber( 6296 "From", 6297 unwrapOrError(this->FileName, 6298 this->dumper()->getStaticSymbolName(CGPE.cgp_from)), 6299 CGPE.cgp_from); 6300 W.printNumber( 6301 "To", 6302 unwrapOrError(this->FileName, 6303 this->dumper()->getStaticSymbolName(CGPE.cgp_to)), 6304 CGPE.cgp_to); 6305 W.printNumber("Weight", CGPE.cgp_weight); 6306 } 6307 } 6308 6309 static Expected<std::vector<uint64_t>> toULEB128Array(ArrayRef<uint8_t> Data) { 6310 std::vector<uint64_t> Ret; 6311 const uint8_t *Cur = Data.begin(); 6312 const uint8_t *End = Data.end(); 6313 while (Cur != End) { 6314 unsigned Size; 6315 const char *Err; 6316 Ret.push_back(decodeULEB128(Cur, &Size, End, &Err)); 6317 if (Err) 6318 return createError(Err); 6319 Cur += Size; 6320 } 6321 return Ret; 6322 } 6323 6324 template <class ELFT> 6325 void LLVMStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) { 6326 ListScope L(W, "Addrsig"); 6327 if (!this->dumper()->getDotAddrsigSec()) 6328 return; 6329 ArrayRef<uint8_t> Contents = unwrapOrError( 6330 this->FileName, 6331 Obj->getSectionContents(this->dumper()->getDotAddrsigSec())); 6332 Expected<std::vector<uint64_t>> V = toULEB128Array(Contents); 6333 if (!V) { 6334 reportWarning(V.takeError(), this->FileName); 6335 return; 6336 } 6337 6338 for (uint64_t Sym : *V) { 6339 Expected<std::string> NameOrErr = this->dumper()->getStaticSymbolName(Sym); 6340 if (NameOrErr) { 6341 W.printNumber("Sym", *NameOrErr, Sym); 6342 continue; 6343 } 6344 reportWarning(NameOrErr.takeError(), this->FileName); 6345 W.printNumber("Sym", "<?>", Sym); 6346 } 6347 } 6348 6349 template <typename ELFT> 6350 static void printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc, 6351 ScopedPrinter &W) { 6352 switch (NoteType) { 6353 default: 6354 return; 6355 case ELF::NT_GNU_ABI_TAG: { 6356 const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc); 6357 if (!AbiTag.IsValid) { 6358 W.printString("ABI", "<corrupt GNU_ABI_TAG>"); 6359 } else { 6360 W.printString("OS", AbiTag.OSName); 6361 W.printString("ABI", AbiTag.ABI); 6362 } 6363 break; 6364 } 6365 case ELF::NT_GNU_BUILD_ID: { 6366 W.printString("Build ID", getGNUBuildId(Desc)); 6367 break; 6368 } 6369 case ELF::NT_GNU_GOLD_VERSION: 6370 W.printString("Version", getGNUGoldVersion(Desc)); 6371 break; 6372 case ELF::NT_GNU_PROPERTY_TYPE_0: 6373 ListScope D(W, "Property"); 6374 for (const auto &Property : getGNUPropertyList<ELFT>(Desc)) 6375 W.printString(Property); 6376 break; 6377 } 6378 } 6379 6380 static void printCoreNoteLLVMStyle(const CoreNote &Note, ScopedPrinter &W) { 6381 W.printNumber("Page Size", Note.PageSize); 6382 for (const CoreFileMapping &Mapping : Note.Mappings) { 6383 ListScope D(W, "Mapping"); 6384 W.printHex("Start", Mapping.Start); 6385 W.printHex("End", Mapping.End); 6386 W.printHex("Offset", Mapping.Offset); 6387 W.printString("Filename", Mapping.Filename); 6388 } 6389 } 6390 6391 template <class ELFT> 6392 void LLVMStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) { 6393 ListScope L(W, "Notes"); 6394 6395 auto PrintHeader = [&](Optional<StringRef> SecName, 6396 const typename ELFT::Off Offset, 6397 const typename ELFT::Addr Size) { 6398 W.printString("Name", SecName ? *SecName : "<?>"); 6399 W.printHex("Offset", Offset); 6400 W.printHex("Size", Size); 6401 }; 6402 6403 auto ProcessNote = [&](const Elf_Note &Note) { 6404 DictScope D2(W, "Note"); 6405 StringRef Name = Note.getName(); 6406 ArrayRef<uint8_t> Descriptor = Note.getDesc(); 6407 Elf_Word Type = Note.getType(); 6408 6409 // Print the note owner/type. 6410 W.printString("Owner", Name); 6411 W.printHex("Data size", Descriptor.size()); 6412 if (Name == "GNU") { 6413 W.printString("Type", getGNUNoteTypeName(Type)); 6414 } else if (Name == "FreeBSD") { 6415 W.printString("Type", getFreeBSDNoteTypeName(Type)); 6416 } else if (Name == "AMD") { 6417 W.printString("Type", getAMDNoteTypeName(Type)); 6418 } else if (Name == "AMDGPU") { 6419 W.printString("Type", getAMDGPUNoteTypeName(Type)); 6420 } else { 6421 StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE 6422 ? getCoreNoteTypeName(Type) 6423 : getGenericNoteTypeName(Type); 6424 if (!NoteType.empty()) 6425 W.printString("Type", NoteType); 6426 else 6427 W.printString("Type", 6428 "Unknown (" + to_string(format_hex(Type, 10)) + ")"); 6429 } 6430 6431 // Print the description, or fallback to printing raw bytes for unknown 6432 // owners. 6433 if (Name == "GNU") { 6434 printGNUNoteLLVMStyle<ELFT>(Type, Descriptor, W); 6435 } else if (Name == "AMD") { 6436 const AMDNote N = getAMDNote<ELFT>(Type, Descriptor); 6437 if (!N.Type.empty()) 6438 W.printString(N.Type, N.Value); 6439 } else if (Name == "AMDGPU") { 6440 const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor); 6441 if (!N.Type.empty()) 6442 W.printString(N.Type, N.Value); 6443 } else if (Name == "CORE") { 6444 if (Type == ELF::NT_FILE) { 6445 DataExtractor DescExtractor(Descriptor, 6446 ELFT::TargetEndianness == support::little, 6447 sizeof(Elf_Addr)); 6448 Expected<CoreNote> Note = readCoreNote(DescExtractor); 6449 if (Note) 6450 printCoreNoteLLVMStyle(*Note, W); 6451 else 6452 reportWarning(Note.takeError(), this->FileName); 6453 } 6454 } else if (!Descriptor.empty()) { 6455 W.printBinaryBlock("Description data", Descriptor); 6456 } 6457 }; 6458 6459 ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections()); 6460 if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) { 6461 for (const auto &S : Sections) { 6462 if (S.sh_type != SHT_NOTE) 6463 continue; 6464 DictScope D(W, "NoteSection"); 6465 PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset, 6466 S.sh_size); 6467 Error Err = Error::success(); 6468 for (auto Note : Obj->notes(S, Err)) 6469 ProcessNote(Note); 6470 if (Err) 6471 reportError(std::move(Err), this->FileName); 6472 } 6473 } else { 6474 for (const auto &P : 6475 unwrapOrError(this->FileName, Obj->program_headers())) { 6476 if (P.p_type != PT_NOTE) 6477 continue; 6478 DictScope D(W, "NoteSection"); 6479 PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz); 6480 Error Err = Error::success(); 6481 for (auto Note : Obj->notes(P, Err)) 6482 ProcessNote(Note); 6483 if (Err) 6484 reportError(std::move(Err), this->FileName); 6485 } 6486 } 6487 } 6488 6489 template <class ELFT> 6490 void LLVMStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) { 6491 ListScope L(W, "LinkerOptions"); 6492 6493 unsigned I = -1; 6494 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 6495 ++I; 6496 if (Shdr.sh_type != ELF::SHT_LLVM_LINKER_OPTIONS) 6497 continue; 6498 6499 ArrayRef<uint8_t> Contents = 6500 unwrapOrError(this->FileName, Obj->getSectionContents(&Shdr)); 6501 if (Contents.empty()) 6502 continue; 6503 6504 if (Contents.back() != 0) { 6505 reportWarning(createError("SHT_LLVM_LINKER_OPTIONS section at index " + 6506 Twine(I) + 6507 " is broken: the " 6508 "content is not null-terminated"), 6509 this->FileName); 6510 continue; 6511 } 6512 6513 SmallVector<StringRef, 16> Strings; 6514 toStringRef(Contents.drop_back()).split(Strings, '\0'); 6515 if (Strings.size() % 2 != 0) { 6516 reportWarning( 6517 createError( 6518 "SHT_LLVM_LINKER_OPTIONS section at index " + Twine(I) + 6519 " is broken: an incomplete " 6520 "key-value pair was found. The last possible key was: \"" + 6521 Strings.back() + "\""), 6522 this->FileName); 6523 continue; 6524 } 6525 6526 for (size_t I = 0; I < Strings.size(); I += 2) 6527 W.printString(Strings[I], Strings[I + 1]); 6528 } 6529 } 6530 6531 template <class ELFT> 6532 void LLVMStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) { 6533 ListScope L(W, "DependentLibs"); 6534 6535 auto Warn = [this](unsigned SecNdx, StringRef Msg) { 6536 this->reportUniqueWarning( 6537 createError("SHT_LLVM_DEPENDENT_LIBRARIES section at index " + 6538 Twine(SecNdx) + " is broken: " + Msg)); 6539 }; 6540 6541 unsigned I = -1; 6542 for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) { 6543 ++I; 6544 if (Shdr.sh_type != ELF::SHT_LLVM_DEPENDENT_LIBRARIES) 6545 continue; 6546 6547 Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(&Shdr); 6548 if (!ContentsOrErr) { 6549 Warn(I, toString(ContentsOrErr.takeError())); 6550 continue; 6551 } 6552 6553 ArrayRef<uint8_t> Contents = *ContentsOrErr; 6554 if (!Contents.empty() && Contents.back() != 0) { 6555 Warn(I, "the content is not null-terminated"); 6556 continue; 6557 } 6558 6559 for (const uint8_t *I = Contents.begin(), *E = Contents.end(); I < E;) { 6560 StringRef Lib((const char *)I); 6561 W.printString(Lib); 6562 I += Lib.size() + 1; 6563 } 6564 } 6565 } 6566 6567 template <class ELFT> 6568 void LLVMStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) { 6569 ListScope L(W, "StackSizes"); 6570 if (Obj->isRelocatableObject()) 6571 this->printRelocatableStackSizes(Obj, []() {}); 6572 else 6573 this->printNonRelocatableStackSizes(Obj, []() {}); 6574 } 6575 6576 template <class ELFT> 6577 void LLVMStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) { 6578 DictScope D(W, "Entry"); 6579 W.printString("Function", FuncName); 6580 W.printHex("Size", Size); 6581 } 6582 6583 template <class ELFT> 6584 void LLVMStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) { 6585 auto PrintEntry = [&](const Elf_Addr *E) { 6586 W.printHex("Address", Parser.getGotAddress(E)); 6587 W.printNumber("Access", Parser.getGotOffset(E)); 6588 W.printHex("Initial", *E); 6589 }; 6590 6591 DictScope GS(W, Parser.IsStatic ? "Static GOT" : "Primary GOT"); 6592 6593 W.printHex("Canonical gp value", Parser.getGp()); 6594 { 6595 ListScope RS(W, "Reserved entries"); 6596 { 6597 DictScope D(W, "Entry"); 6598 PrintEntry(Parser.getGotLazyResolver()); 6599 W.printString("Purpose", StringRef("Lazy resolver")); 6600 } 6601 6602 if (Parser.getGotModulePointer()) { 6603 DictScope D(W, "Entry"); 6604 PrintEntry(Parser.getGotModulePointer()); 6605 W.printString("Purpose", StringRef("Module pointer (GNU extension)")); 6606 } 6607 } 6608 { 6609 ListScope LS(W, "Local entries"); 6610 for (auto &E : Parser.getLocalEntries()) { 6611 DictScope D(W, "Entry"); 6612 PrintEntry(&E); 6613 } 6614 } 6615 6616 if (Parser.IsStatic) 6617 return; 6618 6619 { 6620 ListScope GS(W, "Global entries"); 6621 for (auto &E : Parser.getGlobalEntries()) { 6622 DictScope D(W, "Entry"); 6623 6624 PrintEntry(&E); 6625 6626 const Elf_Sym *Sym = Parser.getGotSym(&E); 6627 W.printHex("Value", Sym->st_value); 6628 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6629 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6630 6631 std::string SymName = this->dumper()->getFullSymbolName( 6632 Sym, this->dumper()->getDynamicStringTable(), true); 6633 W.printNumber("Name", SymName, Sym->st_name); 6634 } 6635 } 6636 6637 W.printNumber("Number of TLS and multi-GOT entries", 6638 uint64_t(Parser.getOtherEntries().size())); 6639 } 6640 6641 template <class ELFT> 6642 void LLVMStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) { 6643 auto PrintEntry = [&](const Elf_Addr *E) { 6644 W.printHex("Address", Parser.getPltAddress(E)); 6645 W.printHex("Initial", *E); 6646 }; 6647 6648 DictScope GS(W, "PLT GOT"); 6649 6650 { 6651 ListScope RS(W, "Reserved entries"); 6652 { 6653 DictScope D(W, "Entry"); 6654 PrintEntry(Parser.getPltLazyResolver()); 6655 W.printString("Purpose", StringRef("PLT lazy resolver")); 6656 } 6657 6658 if (auto E = Parser.getPltModulePointer()) { 6659 DictScope D(W, "Entry"); 6660 PrintEntry(E); 6661 W.printString("Purpose", StringRef("Module pointer")); 6662 } 6663 } 6664 { 6665 ListScope LS(W, "Entries"); 6666 for (auto &E : Parser.getPltEntries()) { 6667 DictScope D(W, "Entry"); 6668 PrintEntry(&E); 6669 6670 const Elf_Sym *Sym = Parser.getPltSym(&E); 6671 W.printHex("Value", Sym->st_value); 6672 W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes)); 6673 printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin()); 6674 6675 std::string SymName = 6676 this->dumper()->getFullSymbolName(Sym, Parser.getPltStrTable(), true); 6677 W.printNumber("Name", SymName, Sym->st_name); 6678 } 6679 } 6680 } 6681 6682 template <class ELFT> 6683 void LLVMStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) { 6684 const ELFFile<ELFT> *Obj = ObjF->getELFFile(); 6685 const Elf_Shdr *Shdr = 6686 findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags"); 6687 if (!Shdr) { 6688 W.startLine() << "There is no .MIPS.abiflags section in the file.\n"; 6689 return; 6690 } 6691 ArrayRef<uint8_t> Sec = 6692 unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr)); 6693 if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) { 6694 W.startLine() << "The .MIPS.abiflags section has a wrong size.\n"; 6695 return; 6696 } 6697 6698 auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data()); 6699 6700 raw_ostream &OS = W.getOStream(); 6701 DictScope GS(W, "MIPS ABI Flags"); 6702 6703 W.printNumber("Version", Flags->version); 6704 W.startLine() << "ISA: "; 6705 if (Flags->isa_rev <= 1) 6706 OS << format("MIPS%u", Flags->isa_level); 6707 else 6708 OS << format("MIPS%ur%u", Flags->isa_level, Flags->isa_rev); 6709 OS << "\n"; 6710 W.printEnum("ISA Extension", Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)); 6711 W.printFlags("ASEs", Flags->ases, makeArrayRef(ElfMipsASEFlags)); 6712 W.printEnum("FP ABI", Flags->fp_abi, makeArrayRef(ElfMipsFpABIType)); 6713 W.printNumber("GPR size", getMipsRegisterSize(Flags->gpr_size)); 6714 W.printNumber("CPR1 size", getMipsRegisterSize(Flags->cpr1_size)); 6715 W.printNumber("CPR2 size", getMipsRegisterSize(Flags->cpr2_size)); 6716 W.printFlags("Flags 1", Flags->flags1, makeArrayRef(ElfMipsFlags1)); 6717 W.printHex("Flags 2", Flags->flags2); 6718 } 6719