1//===- ELFObjectFile.h - ELF object file implementation ---------*- C++ -*-===//
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// This file declares the ELFObjectFile template class.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_OBJECT_ELFOBJECTFILE_H
14#define LLVM_OBJECT_ELFOBJECTFILE_H
15
16#include "llvm/ADT/ArrayRef.h"
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ADT/SmallVector.h"
19#include "llvm/ADT/StringRef.h"
20#include "llvm/ADT/Triple.h"
21#include "llvm/ADT/iterator_range.h"
22#include "llvm/BinaryFormat/ELF.h"
23#include "llvm/MC/SubtargetFeature.h"
24#include "llvm/Object/Binary.h"
25#include "llvm/Object/ELF.h"
26#include "llvm/Object/ELFTypes.h"
27#include "llvm/Object/Error.h"
28#include "llvm/Object/ObjectFile.h"
29#include "llvm/Object/SymbolicFile.h"
30#include "llvm/Support/ARMAttributeParser.h"
31#include "llvm/Support/Casting.h"
32#include "llvm/Support/ELFAttributes.h"
33#include "llvm/Support/Endian.h"
34#include "llvm/Support/Error.h"
35#include "llvm/Support/ErrorHandling.h"
36#include "llvm/Support/MemoryBuffer.h"
37#include <cassert>
38#include <cstdint>
39#include <system_error>
40
41namespace llvm {
42namespace object {
43
44constexpr int NumElfSymbolTypes = 16;
45extern const llvm::EnumEntry<unsigned> ElfSymbolTypes[NumElfSymbolTypes];
46
47class elf_symbol_iterator;
48
49class ELFObjectFileBase : public ObjectFile {
50  friend class ELFRelocationRef;
51  friend class ELFSectionRef;
52  friend class ELFSymbolRef;
53
54protected:
55  ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source);
56
57  virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
58  virtual uint8_t getSymbolBinding(DataRefImpl Symb) const = 0;
59  virtual uint8_t getSymbolOther(DataRefImpl Symb) const = 0;
60  virtual uint8_t getSymbolELFType(DataRefImpl Symb) const = 0;
61
62  virtual uint32_t getSectionType(DataRefImpl Sec) const = 0;
63  virtual uint64_t getSectionFlags(DataRefImpl Sec) const = 0;
64  virtual uint64_t getSectionOffset(DataRefImpl Sec) const = 0;
65
66  virtual Expected<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
67  virtual Error getBuildAttributes(ELFAttributeParser &Attributes) const = 0;
68
69public:
70  using elf_symbol_iterator_range = iterator_range<elf_symbol_iterator>;
71
72  virtual elf_symbol_iterator_range getDynamicSymbolIterators() const = 0;
73
74  /// Returns platform-specific object flags, if any.
75  virtual unsigned getPlatformFlags() const = 0;
76
77  elf_symbol_iterator_range symbols() const;
78
79  static bool classof(const Binary *v) { return v->isELF(); }
80
81  SubtargetFeatures getFeatures() const override;
82
83  SubtargetFeatures getMIPSFeatures() const;
84
85  SubtargetFeatures getARMFeatures() const;
86
87  SubtargetFeatures getRISCVFeatures() const;
88
89  void setARMSubArch(Triple &TheTriple) const override;
90
91  virtual uint16_t getEType() const = 0;
92
93  virtual uint16_t getEMachine() const = 0;
94
95  std::vector<std::pair<DataRefImpl, uint64_t>> getPltAddresses() const;
96};
97
98class ELFSectionRef : public SectionRef {
99public:
100  ELFSectionRef(const SectionRef &B) : SectionRef(B) {
101    assert(isa<ELFObjectFileBase>(SectionRef::getObject()));
102  }
103
104  const ELFObjectFileBase *getObject() const {
105    return cast<ELFObjectFileBase>(SectionRef::getObject());
106  }
107
108  uint32_t getType() const {
109    return getObject()->getSectionType(getRawDataRefImpl());
110  }
111
112  uint64_t getFlags() const {
113    return getObject()->getSectionFlags(getRawDataRefImpl());
114  }
115
116  uint64_t getOffset() const {
117    return getObject()->getSectionOffset(getRawDataRefImpl());
118  }
119};
120
121class elf_section_iterator : public section_iterator {
122public:
123  elf_section_iterator(const section_iterator &B) : section_iterator(B) {
124    assert(isa<ELFObjectFileBase>(B->getObject()));
125  }
126
127  const ELFSectionRef *operator->() const {
128    return static_cast<const ELFSectionRef *>(section_iterator::operator->());
129  }
130
131  const ELFSectionRef &operator*() const {
132    return static_cast<const ELFSectionRef &>(section_iterator::operator*());
133  }
134};
135
136class ELFSymbolRef : public SymbolRef {
137public:
138  ELFSymbolRef(const SymbolRef &B) : SymbolRef(B) {
139    assert(isa<ELFObjectFileBase>(SymbolRef::getObject()));
140  }
141
142  const ELFObjectFileBase *getObject() const {
143    return cast<ELFObjectFileBase>(BasicSymbolRef::getObject());
144  }
145
146  uint64_t getSize() const {
147    return getObject()->getSymbolSize(getRawDataRefImpl());
148  }
149
150  uint8_t getBinding() const {
151    return getObject()->getSymbolBinding(getRawDataRefImpl());
152  }
153
154  uint8_t getOther() const {
155    return getObject()->getSymbolOther(getRawDataRefImpl());
156  }
157
158  uint8_t getELFType() const {
159    return getObject()->getSymbolELFType(getRawDataRefImpl());
160  }
161
162  StringRef getELFTypeName() const {
163    uint8_t Type = getELFType();
164    for (auto &EE : ElfSymbolTypes) {
165      if (EE.Value == Type) {
166        return EE.AltName;
167      }
168    }
169    return "";
170  }
171};
172
173class elf_symbol_iterator : public symbol_iterator {
174public:
175  elf_symbol_iterator(const basic_symbol_iterator &B)
176      : symbol_iterator(SymbolRef(B->getRawDataRefImpl(),
177                                  cast<ELFObjectFileBase>(B->getObject()))) {}
178
179  const ELFSymbolRef *operator->() const {
180    return static_cast<const ELFSymbolRef *>(symbol_iterator::operator->());
181  }
182
183  const ELFSymbolRef &operator*() const {
184    return static_cast<const ELFSymbolRef &>(symbol_iterator::operator*());
185  }
186};
187
188class ELFRelocationRef : public RelocationRef {
189public:
190  ELFRelocationRef(const RelocationRef &B) : RelocationRef(B) {
191    assert(isa<ELFObjectFileBase>(RelocationRef::getObject()));
192  }
193
194  const ELFObjectFileBase *getObject() const {
195    return cast<ELFObjectFileBase>(RelocationRef::getObject());
196  }
197
198  Expected<int64_t> getAddend() const {
199    return getObject()->getRelocationAddend(getRawDataRefImpl());
200  }
201};
202
203class elf_relocation_iterator : public relocation_iterator {
204public:
205  elf_relocation_iterator(const relocation_iterator &B)
206      : relocation_iterator(RelocationRef(
207            B->getRawDataRefImpl(), cast<ELFObjectFileBase>(B->getObject()))) {}
208
209  const ELFRelocationRef *operator->() const {
210    return static_cast<const ELFRelocationRef *>(
211        relocation_iterator::operator->());
212  }
213
214  const ELFRelocationRef &operator*() const {
215    return static_cast<const ELFRelocationRef &>(
216        relocation_iterator::operator*());
217  }
218};
219
220inline ELFObjectFileBase::elf_symbol_iterator_range
221ELFObjectFileBase::symbols() const {
222  return elf_symbol_iterator_range(symbol_begin(), symbol_end());
223}
224
225template <class ELFT> class ELFObjectFile : public ELFObjectFileBase {
226  uint16_t getEMachine() const override;
227  uint16_t getEType() const override;
228  uint64_t getSymbolSize(DataRefImpl Sym) const override;
229
230public:
231  LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
232
233  using uintX_t = typename ELFT::uint;
234
235  using Elf_Sym = typename ELFT::Sym;
236  using Elf_Shdr = typename ELFT::Shdr;
237  using Elf_Ehdr = typename ELFT::Ehdr;
238  using Elf_Rel = typename ELFT::Rel;
239  using Elf_Rela = typename ELFT::Rela;
240  using Elf_Dyn = typename ELFT::Dyn;
241
242  SectionRef toSectionRef(const Elf_Shdr *Sec) const {
243    return SectionRef(toDRI(Sec), this);
244  }
245
246private:
247  ELFObjectFile(MemoryBufferRef Object, ELFFile<ELFT> EF,
248                const Elf_Shdr *DotDynSymSec, const Elf_Shdr *DotSymtabSec,
249                ArrayRef<Elf_Word> ShndxTable);
250
251protected:
252  ELFFile<ELFT> EF;
253
254  const Elf_Shdr *DotDynSymSec = nullptr; // Dynamic symbol table section.
255  const Elf_Shdr *DotSymtabSec = nullptr; // Symbol table section.
256  ArrayRef<Elf_Word> ShndxTable;
257
258  void moveSymbolNext(DataRefImpl &Symb) const override;
259  Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
260  Expected<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
261  uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
262  uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
263  uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
264  Expected<uint32_t> getSymbolFlags(DataRefImpl Symb) const override;
265  uint8_t getSymbolBinding(DataRefImpl Symb) const override;
266  uint8_t getSymbolOther(DataRefImpl Symb) const override;
267  uint8_t getSymbolELFType(DataRefImpl Symb) const override;
268  Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
269  Expected<section_iterator> getSymbolSection(const Elf_Sym *Symb,
270                                              const Elf_Shdr *SymTab) const;
271  Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
272
273  void moveSectionNext(DataRefImpl &Sec) const override;
274  Expected<StringRef> getSectionName(DataRefImpl Sec) const override;
275  uint64_t getSectionAddress(DataRefImpl Sec) const override;
276  uint64_t getSectionIndex(DataRefImpl Sec) const override;
277  uint64_t getSectionSize(DataRefImpl Sec) const override;
278  Expected<ArrayRef<uint8_t>>
279  getSectionContents(DataRefImpl Sec) const override;
280  uint64_t getSectionAlignment(DataRefImpl Sec) const override;
281  bool isSectionCompressed(DataRefImpl Sec) const override;
282  bool isSectionText(DataRefImpl Sec) const override;
283  bool isSectionData(DataRefImpl Sec) const override;
284  bool isSectionBSS(DataRefImpl Sec) const override;
285  bool isSectionVirtual(DataRefImpl Sec) const override;
286  bool isBerkeleyText(DataRefImpl Sec) const override;
287  bool isBerkeleyData(DataRefImpl Sec) const override;
288  bool isDebugSection(StringRef SectionName) const override;
289  relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
290  relocation_iterator section_rel_end(DataRefImpl Sec) const override;
291  std::vector<SectionRef> dynamic_relocation_sections() const override;
292  Expected<section_iterator>
293  getRelocatedSection(DataRefImpl Sec) const override;
294
295  void moveRelocationNext(DataRefImpl &Rel) const override;
296  uint64_t getRelocationOffset(DataRefImpl Rel) const override;
297  symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
298  uint64_t getRelocationType(DataRefImpl Rel) const override;
299  void getRelocationTypeName(DataRefImpl Rel,
300                             SmallVectorImpl<char> &Result) const override;
301
302  uint32_t getSectionType(DataRefImpl Sec) const override;
303  uint64_t getSectionFlags(DataRefImpl Sec) const override;
304  uint64_t getSectionOffset(DataRefImpl Sec) const override;
305  StringRef getRelocationTypeName(uint32_t Type) const;
306
307  /// Get the relocation section that contains \a Rel.
308  const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
309    auto RelSecOrErr = EF.getSection(Rel.d.a);
310    if (!RelSecOrErr)
311      report_fatal_error(errorToErrorCode(RelSecOrErr.takeError()).message());
312    return *RelSecOrErr;
313  }
314
315  DataRefImpl toDRI(const Elf_Shdr *SymTable, unsigned SymbolNum) const {
316    DataRefImpl DRI;
317    if (!SymTable) {
318      DRI.d.a = 0;
319      DRI.d.b = 0;
320      return DRI;
321    }
322    assert(SymTable->sh_type == ELF::SHT_SYMTAB ||
323           SymTable->sh_type == ELF::SHT_DYNSYM);
324
325    auto SectionsOrErr = EF.sections();
326    if (!SectionsOrErr) {
327      DRI.d.a = 0;
328      DRI.d.b = 0;
329      return DRI;
330    }
331    uintptr_t SHT = reinterpret_cast<uintptr_t>((*SectionsOrErr).begin());
332    unsigned SymTableIndex =
333        (reinterpret_cast<uintptr_t>(SymTable) - SHT) / sizeof(Elf_Shdr);
334
335    DRI.d.a = SymTableIndex;
336    DRI.d.b = SymbolNum;
337    return DRI;
338  }
339
340  const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
341    return reinterpret_cast<const Elf_Shdr *>(Sec.p);
342  }
343
344  DataRefImpl toDRI(const Elf_Shdr *Sec) const {
345    DataRefImpl DRI;
346    DRI.p = reinterpret_cast<uintptr_t>(Sec);
347    return DRI;
348  }
349
350  DataRefImpl toDRI(const Elf_Dyn *Dyn) const {
351    DataRefImpl DRI;
352    DRI.p = reinterpret_cast<uintptr_t>(Dyn);
353    return DRI;
354  }
355
356  bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
357    unsigned char Binding = ESym->getBinding();
358    unsigned char Visibility = ESym->getVisibility();
359
360    // A symbol is exported if its binding is either GLOBAL or WEAK, and its
361    // visibility is either DEFAULT or PROTECTED. All other symbols are not
362    // exported.
363    return (
364        (Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK ||
365         Binding == ELF::STB_GNU_UNIQUE) &&
366        (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED));
367  }
368
369  Error getBuildAttributes(ELFAttributeParser &Attributes) const override {
370    auto SectionsOrErr = EF.sections();
371    if (!SectionsOrErr)
372      return SectionsOrErr.takeError();
373
374    for (const Elf_Shdr &Sec : *SectionsOrErr) {
375      if (Sec.sh_type == ELF::SHT_ARM_ATTRIBUTES ||
376          Sec.sh_type == ELF::SHT_RISCV_ATTRIBUTES) {
377        auto ErrorOrContents = EF.getSectionContents(&Sec);
378        if (!ErrorOrContents)
379          return ErrorOrContents.takeError();
380
381        auto Contents = ErrorOrContents.get();
382        if (Contents[0] != ELFAttrs::Format_Version || Contents.size() == 1)
383          return Error::success();
384
385        if (Error E = Attributes.parse(Contents, ELFT::TargetEndianness))
386          return E;
387        break;
388      }
389    }
390    return Error::success();
391  }
392
393  // This flag is used for classof, to distinguish ELFObjectFile from
394  // its subclass. If more subclasses will be created, this flag will
395  // have to become an enum.
396  bool isDyldELFObject;
397
398public:
399  ELFObjectFile(ELFObjectFile<ELFT> &&Other);
400  static Expected<ELFObjectFile<ELFT>> create(MemoryBufferRef Object);
401
402  const Elf_Rel *getRel(DataRefImpl Rel) const;
403  const Elf_Rela *getRela(DataRefImpl Rela) const;
404
405  const Elf_Sym *getSymbol(DataRefImpl Sym) const {
406    auto Ret = EF.template getEntry<Elf_Sym>(Sym.d.a, Sym.d.b);
407    if (!Ret)
408      report_fatal_error(errorToErrorCode(Ret.takeError()).message());
409    return *Ret;
410  }
411
412  const Elf_Shdr *getSection(DataRefImpl Sec) const {
413    return reinterpret_cast<const Elf_Shdr *>(Sec.p);
414  }
415
416  basic_symbol_iterator symbol_begin() const override;
417  basic_symbol_iterator symbol_end() const override;
418
419  elf_symbol_iterator dynamic_symbol_begin() const;
420  elf_symbol_iterator dynamic_symbol_end() const;
421
422  section_iterator section_begin() const override;
423  section_iterator section_end() const override;
424
425  Expected<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
426
427  uint8_t getBytesInAddress() const override;
428  StringRef getFileFormatName() const override;
429  Triple::ArchType getArch() const override;
430  Expected<uint64_t> getStartAddress() const override;
431
432  unsigned getPlatformFlags() const override { return EF.getHeader()->e_flags; }
433
434  const ELFFile<ELFT> *getELFFile() const { return &EF; }
435
436  bool isDyldType() const { return isDyldELFObject; }
437  static bool classof(const Binary *v) {
438    return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
439                                      ELFT::Is64Bits);
440  }
441
442  elf_symbol_iterator_range getDynamicSymbolIterators() const override;
443
444  bool isRelocatableObject() const override;
445};
446
447using ELF32LEObjectFile = ELFObjectFile<ELF32LE>;
448using ELF64LEObjectFile = ELFObjectFile<ELF64LE>;
449using ELF32BEObjectFile = ELFObjectFile<ELF32BE>;
450using ELF64BEObjectFile = ELFObjectFile<ELF64BE>;
451
452template <class ELFT>
453void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
454  ++Sym.d.b;
455}
456
457template <class ELFT>
458Expected<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const {
459  const Elf_Sym *ESym = getSymbol(Sym);
460  auto SymTabOrErr = EF.getSection(Sym.d.a);
461  if (!SymTabOrErr)
462    return SymTabOrErr.takeError();
463  const Elf_Shdr *SymTableSec = *SymTabOrErr;
464  auto StrTabOrErr = EF.getSection(SymTableSec->sh_link);
465  if (!StrTabOrErr)
466    return StrTabOrErr.takeError();
467  const Elf_Shdr *StringTableSec = *StrTabOrErr;
468  auto SymStrTabOrErr = EF.getStringTable(StringTableSec);
469  if (!SymStrTabOrErr)
470    return SymStrTabOrErr.takeError();
471  Expected<StringRef> Name = ESym->getName(*SymStrTabOrErr);
472  if (Name && !Name->empty())
473    return Name;
474
475  // If the symbol name is empty use the section name.
476  if (ESym->getType() == ELF::STT_SECTION) {
477    if (Expected<section_iterator> SecOrErr = getSymbolSection(Sym)) {
478      consumeError(Name.takeError());
479      return (*SecOrErr)->getName();
480    }
481  }
482  return Name;
483}
484
485template <class ELFT>
486uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
487  return getSection(Sec)->sh_flags;
488}
489
490template <class ELFT>
491uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
492  return getSection(Sec)->sh_type;
493}
494
495template <class ELFT>
496uint64_t ELFObjectFile<ELFT>::getSectionOffset(DataRefImpl Sec) const {
497  return getSection(Sec)->sh_offset;
498}
499
500template <class ELFT>
501uint64_t ELFObjectFile<ELFT>::getSymbolValueImpl(DataRefImpl Symb) const {
502  const Elf_Sym *ESym = getSymbol(Symb);
503  uint64_t Ret = ESym->st_value;
504  if (ESym->st_shndx == ELF::SHN_ABS)
505    return Ret;
506
507  const Elf_Ehdr *Header = EF.getHeader();
508  // Clear the ARM/Thumb or microMIPS indicator flag.
509  if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
510      ESym->getType() == ELF::STT_FUNC)
511    Ret &= ~1;
512
513  return Ret;
514}
515
516template <class ELFT>
517Expected<uint64_t>
518ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb) const {
519  Expected<uint64_t> SymbolValueOrErr = getSymbolValue(Symb);
520  if (!SymbolValueOrErr)
521    // TODO: Test this error.
522    return SymbolValueOrErr.takeError();
523
524  uint64_t Result = *SymbolValueOrErr;
525  const Elf_Sym *ESym = getSymbol(Symb);
526  switch (ESym->st_shndx) {
527  case ELF::SHN_COMMON:
528  case ELF::SHN_UNDEF:
529  case ELF::SHN_ABS:
530    return Result;
531  }
532
533  const Elf_Ehdr *Header = EF.getHeader();
534  auto SymTabOrErr = EF.getSection(Symb.d.a);
535  if (!SymTabOrErr)
536    return SymTabOrErr.takeError();
537  const Elf_Shdr *SymTab = *SymTabOrErr;
538
539  if (Header->e_type == ELF::ET_REL) {
540    auto SectionOrErr = EF.getSection(ESym, SymTab, ShndxTable);
541    if (!SectionOrErr)
542      return SectionOrErr.takeError();
543    const Elf_Shdr *Section = *SectionOrErr;
544    if (Section)
545      Result += Section->sh_addr;
546  }
547
548  return Result;
549}
550
551template <class ELFT>
552uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
553  const Elf_Sym *Sym = getSymbol(Symb);
554  if (Sym->st_shndx == ELF::SHN_COMMON)
555    return Sym->st_value;
556  return 0;
557}
558
559template <class ELFT>
560uint16_t ELFObjectFile<ELFT>::getEMachine() const {
561  return EF.getHeader()->e_machine;
562}
563
564template <class ELFT> uint16_t ELFObjectFile<ELFT>::getEType() const {
565  return EF.getHeader()->e_type;
566}
567
568template <class ELFT>
569uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
570  return getSymbol(Sym)->st_size;
571}
572
573template <class ELFT>
574uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
575  return getSymbol(Symb)->st_size;
576}
577
578template <class ELFT>
579uint8_t ELFObjectFile<ELFT>::getSymbolBinding(DataRefImpl Symb) const {
580  return getSymbol(Symb)->getBinding();
581}
582
583template <class ELFT>
584uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
585  return getSymbol(Symb)->st_other;
586}
587
588template <class ELFT>
589uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
590  return getSymbol(Symb)->getType();
591}
592
593template <class ELFT>
594Expected<SymbolRef::Type>
595ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
596  const Elf_Sym *ESym = getSymbol(Symb);
597
598  switch (ESym->getType()) {
599  case ELF::STT_NOTYPE:
600    return SymbolRef::ST_Unknown;
601  case ELF::STT_SECTION:
602    return SymbolRef::ST_Debug;
603  case ELF::STT_FILE:
604    return SymbolRef::ST_File;
605  case ELF::STT_FUNC:
606    return SymbolRef::ST_Function;
607  case ELF::STT_OBJECT:
608  case ELF::STT_COMMON:
609  case ELF::STT_TLS:
610    return SymbolRef::ST_Data;
611  default:
612    return SymbolRef::ST_Other;
613  }
614}
615
616template <class ELFT>
617Expected<uint32_t> ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
618  const Elf_Sym *ESym = getSymbol(Sym);
619
620  uint32_t Result = SymbolRef::SF_None;
621
622  if (ESym->getBinding() != ELF::STB_LOCAL)
623    Result |= SymbolRef::SF_Global;
624
625  if (ESym->getBinding() == ELF::STB_WEAK)
626    Result |= SymbolRef::SF_Weak;
627
628  if (ESym->st_shndx == ELF::SHN_ABS)
629    Result |= SymbolRef::SF_Absolute;
630
631  if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION)
632    Result |= SymbolRef::SF_FormatSpecific;
633
634  if (Expected<typename ELFT::SymRange> SymbolsOrErr =
635          EF.symbols(DotSymtabSec)) {
636    // Set the SF_FormatSpecific flag for the 0-index null symbol.
637    if (ESym == SymbolsOrErr->begin())
638      Result |= SymbolRef::SF_FormatSpecific;
639  } else
640    // TODO: Test this error.
641    return SymbolsOrErr.takeError();
642
643  if (Expected<typename ELFT::SymRange> SymbolsOrErr =
644          EF.symbols(DotDynSymSec)) {
645    // Set the SF_FormatSpecific flag for the 0-index null symbol.
646    if (ESym == SymbolsOrErr->begin())
647      Result |= SymbolRef::SF_FormatSpecific;
648  } else
649    // TODO: Test this error.
650    return SymbolsOrErr.takeError();
651
652  if (EF.getHeader()->e_machine == ELF::EM_ARM) {
653    if (Expected<StringRef> NameOrErr = getSymbolName(Sym)) {
654      StringRef Name = *NameOrErr;
655      if (Name.startswith("$d") || Name.startswith("$t") ||
656          Name.startswith("$a"))
657        Result |= SymbolRef::SF_FormatSpecific;
658    } else {
659      // TODO: Actually report errors helpfully.
660      consumeError(NameOrErr.takeError());
661    }
662    if (ESym->getType() == ELF::STT_FUNC && (ESym->st_value & 1) == 1)
663      Result |= SymbolRef::SF_Thumb;
664  }
665
666  if (ESym->st_shndx == ELF::SHN_UNDEF)
667    Result |= SymbolRef::SF_Undefined;
668
669  if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
670    Result |= SymbolRef::SF_Common;
671
672  if (isExportedToOtherDSO(ESym))
673    Result |= SymbolRef::SF_Exported;
674
675  if (ESym->getVisibility() == ELF::STV_HIDDEN)
676    Result |= SymbolRef::SF_Hidden;
677
678  return Result;
679}
680
681template <class ELFT>
682Expected<section_iterator>
683ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym,
684                                      const Elf_Shdr *SymTab) const {
685  auto ESecOrErr = EF.getSection(ESym, SymTab, ShndxTable);
686  if (!ESecOrErr)
687    return ESecOrErr.takeError();
688
689  const Elf_Shdr *ESec = *ESecOrErr;
690  if (!ESec)
691    return section_end();
692
693  DataRefImpl Sec;
694  Sec.p = reinterpret_cast<intptr_t>(ESec);
695  return section_iterator(SectionRef(Sec, this));
696}
697
698template <class ELFT>
699Expected<section_iterator>
700ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb) const {
701  const Elf_Sym *Sym = getSymbol(Symb);
702  auto SymTabOrErr = EF.getSection(Symb.d.a);
703  if (!SymTabOrErr)
704    return SymTabOrErr.takeError();
705  const Elf_Shdr *SymTab = *SymTabOrErr;
706  return getSymbolSection(Sym, SymTab);
707}
708
709template <class ELFT>
710void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
711  const Elf_Shdr *ESec = getSection(Sec);
712  Sec = toDRI(++ESec);
713}
714
715template <class ELFT>
716Expected<StringRef> ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec) const {
717  return EF.getSectionName(&*getSection(Sec));
718}
719
720template <class ELFT>
721uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
722  return getSection(Sec)->sh_addr;
723}
724
725template <class ELFT>
726uint64_t ELFObjectFile<ELFT>::getSectionIndex(DataRefImpl Sec) const {
727  auto SectionsOrErr = EF.sections();
728  handleAllErrors(std::move(SectionsOrErr.takeError()),
729                  [](const ErrorInfoBase &) {
730                    llvm_unreachable("unable to get section index");
731                  });
732  const Elf_Shdr *First = SectionsOrErr->begin();
733  return getSection(Sec) - First;
734}
735
736template <class ELFT>
737uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
738  return getSection(Sec)->sh_size;
739}
740
741template <class ELFT>
742Expected<ArrayRef<uint8_t>>
743ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec) const {
744  const Elf_Shdr *EShdr = getSection(Sec);
745  if (EShdr->sh_type == ELF::SHT_NOBITS)
746    return makeArrayRef((const uint8_t *)base(), 0);
747  if (Error E =
748          checkOffset(getMemoryBufferRef(),
749                      (uintptr_t)base() + EShdr->sh_offset, EShdr->sh_size))
750    return std::move(E);
751  return makeArrayRef((const uint8_t *)base() + EShdr->sh_offset,
752                      EShdr->sh_size);
753}
754
755template <class ELFT>
756uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
757  return getSection(Sec)->sh_addralign;
758}
759
760template <class ELFT>
761bool ELFObjectFile<ELFT>::isSectionCompressed(DataRefImpl Sec) const {
762  return getSection(Sec)->sh_flags & ELF::SHF_COMPRESSED;
763}
764
765template <class ELFT>
766bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
767  return getSection(Sec)->sh_flags & ELF::SHF_EXECINSTR;
768}
769
770template <class ELFT>
771bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
772  const Elf_Shdr *EShdr = getSection(Sec);
773  return EShdr->sh_type == ELF::SHT_PROGBITS &&
774         EShdr->sh_flags & ELF::SHF_ALLOC &&
775         !(EShdr->sh_flags & ELF::SHF_EXECINSTR);
776}
777
778template <class ELFT>
779bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
780  const Elf_Shdr *EShdr = getSection(Sec);
781  return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
782         EShdr->sh_type == ELF::SHT_NOBITS;
783}
784
785template <class ELFT>
786std::vector<SectionRef>
787ELFObjectFile<ELFT>::dynamic_relocation_sections() const {
788  std::vector<SectionRef> Res;
789  std::vector<uintptr_t> Offsets;
790
791  auto SectionsOrErr = EF.sections();
792  if (!SectionsOrErr)
793    return Res;
794
795  for (const Elf_Shdr &Sec : *SectionsOrErr) {
796    if (Sec.sh_type != ELF::SHT_DYNAMIC)
797      continue;
798    Elf_Dyn *Dynamic =
799        reinterpret_cast<Elf_Dyn *>((uintptr_t)base() + Sec.sh_offset);
800    for (; Dynamic->d_tag != ELF::DT_NULL; Dynamic++) {
801      if (Dynamic->d_tag == ELF::DT_REL || Dynamic->d_tag == ELF::DT_RELA ||
802          Dynamic->d_tag == ELF::DT_JMPREL) {
803        Offsets.push_back(Dynamic->d_un.d_val);
804      }
805    }
806  }
807  for (const Elf_Shdr &Sec : *SectionsOrErr) {
808    if (is_contained(Offsets, Sec.sh_addr))
809      Res.emplace_back(toDRI(&Sec), this);
810  }
811  return Res;
812}
813
814template <class ELFT>
815bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
816  return getSection(Sec)->sh_type == ELF::SHT_NOBITS;
817}
818
819template <class ELFT>
820bool ELFObjectFile<ELFT>::isBerkeleyText(DataRefImpl Sec) const {
821  return getSection(Sec)->sh_flags & ELF::SHF_ALLOC &&
822         (getSection(Sec)->sh_flags & ELF::SHF_EXECINSTR ||
823          !(getSection(Sec)->sh_flags & ELF::SHF_WRITE));
824}
825
826template <class ELFT>
827bool ELFObjectFile<ELFT>::isBerkeleyData(DataRefImpl Sec) const {
828  const Elf_Shdr *EShdr = getSection(Sec);
829  return !isBerkeleyText(Sec) && EShdr->sh_type != ELF::SHT_NOBITS &&
830         EShdr->sh_flags & ELF::SHF_ALLOC;
831}
832
833template <class ELFT>
834bool ELFObjectFile<ELFT>::isDebugSection(StringRef SectionName) const {
835  return SectionName.startswith(".debug") ||
836         SectionName.startswith(".zdebug") || SectionName == ".gdb_index";
837}
838
839template <class ELFT>
840relocation_iterator
841ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
842  DataRefImpl RelData;
843  auto SectionsOrErr = EF.sections();
844  if (!SectionsOrErr)
845    return relocation_iterator(RelocationRef());
846  uintptr_t SHT = reinterpret_cast<uintptr_t>((*SectionsOrErr).begin());
847  RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
848  RelData.d.b = 0;
849  return relocation_iterator(RelocationRef(RelData, this));
850}
851
852template <class ELFT>
853relocation_iterator
854ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
855  const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
856  relocation_iterator Begin = section_rel_begin(Sec);
857  if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
858    return Begin;
859  DataRefImpl RelData = Begin->getRawDataRefImpl();
860  const Elf_Shdr *RelSec = getRelSection(RelData);
861
862  // Error check sh_link here so that getRelocationSymbol can just use it.
863  auto SymSecOrErr = EF.getSection(RelSec->sh_link);
864  if (!SymSecOrErr)
865    report_fatal_error(errorToErrorCode(SymSecOrErr.takeError()).message());
866
867  RelData.d.b += S->sh_size / S->sh_entsize;
868  return relocation_iterator(RelocationRef(RelData, this));
869}
870
871template <class ELFT>
872Expected<section_iterator>
873ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
874  if (EF.getHeader()->e_type != ELF::ET_REL)
875    return section_end();
876
877  const Elf_Shdr *EShdr = getSection(Sec);
878  uintX_t Type = EShdr->sh_type;
879  if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
880    return section_end();
881
882  Expected<const Elf_Shdr *> SecOrErr = EF.getSection(EShdr->sh_info);
883  if (!SecOrErr)
884    return SecOrErr.takeError();
885  return section_iterator(SectionRef(toDRI(*SecOrErr), this));
886}
887
888// Relocations
889template <class ELFT>
890void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
891  ++Rel.d.b;
892}
893
894template <class ELFT>
895symbol_iterator
896ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
897  uint32_t symbolIdx;
898  const Elf_Shdr *sec = getRelSection(Rel);
899  if (sec->sh_type == ELF::SHT_REL)
900    symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
901  else
902    symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
903  if (!symbolIdx)
904    return symbol_end();
905
906  // FIXME: error check symbolIdx
907  DataRefImpl SymbolData;
908  SymbolData.d.a = sec->sh_link;
909  SymbolData.d.b = symbolIdx;
910  return symbol_iterator(SymbolRef(SymbolData, this));
911}
912
913template <class ELFT>
914uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
915  const Elf_Shdr *sec = getRelSection(Rel);
916  if (sec->sh_type == ELF::SHT_REL)
917    return getRel(Rel)->r_offset;
918
919  return getRela(Rel)->r_offset;
920}
921
922template <class ELFT>
923uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
924  const Elf_Shdr *sec = getRelSection(Rel);
925  if (sec->sh_type == ELF::SHT_REL)
926    return getRel(Rel)->getType(EF.isMips64EL());
927  else
928    return getRela(Rel)->getType(EF.isMips64EL());
929}
930
931template <class ELFT>
932StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
933  return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
934}
935
936template <class ELFT>
937void ELFObjectFile<ELFT>::getRelocationTypeName(
938    DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
939  uint32_t type = getRelocationType(Rel);
940  EF.getRelocationTypeName(type, Result);
941}
942
943template <class ELFT>
944Expected<int64_t>
945ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
946  if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
947    return createError("Section is not SHT_RELA");
948  return (int64_t)getRela(Rel)->r_addend;
949}
950
951template <class ELFT>
952const typename ELFObjectFile<ELFT>::Elf_Rel *
953ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
954  assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
955  auto Ret = EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
956  if (!Ret)
957    report_fatal_error(errorToErrorCode(Ret.takeError()).message());
958  return *Ret;
959}
960
961template <class ELFT>
962const typename ELFObjectFile<ELFT>::Elf_Rela *
963ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
964  assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
965  auto Ret = EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
966  if (!Ret)
967    report_fatal_error(errorToErrorCode(Ret.takeError()).message());
968  return *Ret;
969}
970
971template <class ELFT>
972Expected<ELFObjectFile<ELFT>>
973ELFObjectFile<ELFT>::create(MemoryBufferRef Object) {
974  auto EFOrErr = ELFFile<ELFT>::create(Object.getBuffer());
975  if (Error E = EFOrErr.takeError())
976    return std::move(E);
977  auto EF = std::move(*EFOrErr);
978
979  auto SectionsOrErr = EF.sections();
980  if (!SectionsOrErr)
981    return SectionsOrErr.takeError();
982
983  const Elf_Shdr *DotDynSymSec = nullptr;
984  const Elf_Shdr *DotSymtabSec = nullptr;
985  ArrayRef<Elf_Word> ShndxTable;
986  for (const Elf_Shdr &Sec : *SectionsOrErr) {
987    switch (Sec.sh_type) {
988    case ELF::SHT_DYNSYM: {
989      if (!DotDynSymSec)
990        DotDynSymSec = &Sec;
991      break;
992    }
993    case ELF::SHT_SYMTAB: {
994      if (!DotSymtabSec)
995        DotSymtabSec = &Sec;
996      break;
997    }
998    case ELF::SHT_SYMTAB_SHNDX: {
999      auto TableOrErr = EF.getSHNDXTable(Sec);
1000      if (!TableOrErr)
1001        return TableOrErr.takeError();
1002      ShndxTable = *TableOrErr;
1003      break;
1004    }
1005    }
1006  }
1007  return ELFObjectFile<ELFT>(Object, EF, DotDynSymSec, DotSymtabSec,
1008                             ShndxTable);
1009}
1010
1011template <class ELFT>
1012ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, ELFFile<ELFT> EF,
1013                                   const Elf_Shdr *DotDynSymSec,
1014                                   const Elf_Shdr *DotSymtabSec,
1015                                   ArrayRef<Elf_Word> ShndxTable)
1016    : ELFObjectFileBase(
1017          getELFType(ELFT::TargetEndianness == support::little, ELFT::Is64Bits),
1018          Object),
1019      EF(EF), DotDynSymSec(DotDynSymSec), DotSymtabSec(DotSymtabSec),
1020      ShndxTable(ShndxTable) {}
1021
1022template <class ELFT>
1023ELFObjectFile<ELFT>::ELFObjectFile(ELFObjectFile<ELFT> &&Other)
1024    : ELFObjectFile(Other.Data, Other.EF, Other.DotDynSymSec,
1025                    Other.DotSymtabSec, Other.ShndxTable) {}
1026
1027template <class ELFT>
1028basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin() const {
1029  DataRefImpl Sym =
1030      toDRI(DotSymtabSec,
1031            DotSymtabSec && DotSymtabSec->sh_size >= sizeof(Elf_Sym) ? 1 : 0);
1032  return basic_symbol_iterator(SymbolRef(Sym, this));
1033}
1034
1035template <class ELFT>
1036basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end() const {
1037  const Elf_Shdr *SymTab = DotSymtabSec;
1038  if (!SymTab)
1039    return symbol_begin();
1040  DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
1041  return basic_symbol_iterator(SymbolRef(Sym, this));
1042}
1043
1044template <class ELFT>
1045elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
1046  if (!DotDynSymSec || DotDynSymSec->sh_size < sizeof(Elf_Sym))
1047    // Ignore errors here where the dynsym is empty or sh_size less than the
1048    // size of one symbol. These should be handled elsewhere.
1049    return symbol_iterator(SymbolRef(toDRI(DotDynSymSec, 0), this));
1050  // Skip 0-index NULL symbol.
1051  return symbol_iterator(SymbolRef(toDRI(DotDynSymSec, 1), this));
1052}
1053
1054template <class ELFT>
1055elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
1056  const Elf_Shdr *SymTab = DotDynSymSec;
1057  if (!SymTab)
1058    return dynamic_symbol_begin();
1059  DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
1060  return basic_symbol_iterator(SymbolRef(Sym, this));
1061}
1062
1063template <class ELFT>
1064section_iterator ELFObjectFile<ELFT>::section_begin() const {
1065  auto SectionsOrErr = EF.sections();
1066  if (!SectionsOrErr)
1067    return section_iterator(SectionRef());
1068  return section_iterator(SectionRef(toDRI((*SectionsOrErr).begin()), this));
1069}
1070
1071template <class ELFT>
1072section_iterator ELFObjectFile<ELFT>::section_end() const {
1073  auto SectionsOrErr = EF.sections();
1074  if (!SectionsOrErr)
1075    return section_iterator(SectionRef());
1076  return section_iterator(SectionRef(toDRI((*SectionsOrErr).end()), this));
1077}
1078
1079template <class ELFT>
1080uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
1081  return ELFT::Is64Bits ? 8 : 4;
1082}
1083
1084template <class ELFT>
1085StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
1086  bool IsLittleEndian = ELFT::TargetEndianness == support::little;
1087  switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
1088  case ELF::ELFCLASS32:
1089    switch (EF.getHeader()->e_machine) {
1090    case ELF::EM_386:
1091      return "elf32-i386";
1092    case ELF::EM_IAMCU:
1093      return "elf32-iamcu";
1094    case ELF::EM_X86_64:
1095      return "elf32-x86-64";
1096    case ELF::EM_ARM:
1097      return (IsLittleEndian ? "elf32-littlearm" : "elf32-bigarm");
1098    case ELF::EM_AVR:
1099      return "elf32-avr";
1100    case ELF::EM_HEXAGON:
1101      return "elf32-hexagon";
1102    case ELF::EM_LANAI:
1103      return "elf32-lanai";
1104    case ELF::EM_MIPS:
1105      return "elf32-mips";
1106    case ELF::EM_MSP430:
1107      return "elf32-msp430";
1108    case ELF::EM_PPC:
1109      return "elf32-powerpc";
1110    case ELF::EM_RISCV:
1111      return "elf32-littleriscv";
1112    case ELF::EM_SPARC:
1113    case ELF::EM_SPARC32PLUS:
1114      return "elf32-sparc";
1115    case ELF::EM_AMDGPU:
1116      return "elf32-amdgpu";
1117    default:
1118      return "elf32-unknown";
1119    }
1120  case ELF::ELFCLASS64:
1121    switch (EF.getHeader()->e_machine) {
1122    case ELF::EM_386:
1123      return "elf64-i386";
1124    case ELF::EM_X86_64:
1125      return "elf64-x86-64";
1126    case ELF::EM_AARCH64:
1127      return (IsLittleEndian ? "elf64-littleaarch64" : "elf64-bigaarch64");
1128    case ELF::EM_PPC64:
1129      return (IsLittleEndian ? "elf64-powerpcle" : "elf64-powerpc");
1130    case ELF::EM_RISCV:
1131      return "elf64-littleriscv";
1132    case ELF::EM_S390:
1133      return "elf64-s390";
1134    case ELF::EM_SPARCV9:
1135      return "elf64-sparc";
1136    case ELF::EM_MIPS:
1137      return "elf64-mips";
1138    case ELF::EM_AMDGPU:
1139      return "elf64-amdgpu";
1140    case ELF::EM_BPF:
1141      return "elf64-bpf";
1142    case ELF::EM_VE:
1143      return "elf64-ve";
1144    default:
1145      return "elf64-unknown";
1146    }
1147  default:
1148    // FIXME: Proper error handling.
1149    report_fatal_error("Invalid ELFCLASS!");
1150  }
1151}
1152
1153template <class ELFT> Triple::ArchType ELFObjectFile<ELFT>::getArch() const {
1154  bool IsLittleEndian = ELFT::TargetEndianness == support::little;
1155  switch (EF.getHeader()->e_machine) {
1156  case ELF::EM_386:
1157  case ELF::EM_IAMCU:
1158    return Triple::x86;
1159  case ELF::EM_X86_64:
1160    return Triple::x86_64;
1161  case ELF::EM_AARCH64:
1162    return IsLittleEndian ? Triple::aarch64 : Triple::aarch64_be;
1163  case ELF::EM_ARM:
1164    return Triple::arm;
1165  case ELF::EM_AVR:
1166    return Triple::avr;
1167  case ELF::EM_HEXAGON:
1168    return Triple::hexagon;
1169  case ELF::EM_LANAI:
1170    return Triple::lanai;
1171  case ELF::EM_MIPS:
1172    switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
1173    case ELF::ELFCLASS32:
1174      return IsLittleEndian ? Triple::mipsel : Triple::mips;
1175    case ELF::ELFCLASS64:
1176      return IsLittleEndian ? Triple::mips64el : Triple::mips64;
1177    default:
1178      report_fatal_error("Invalid ELFCLASS!");
1179    }
1180  case ELF::EM_MSP430:
1181    return Triple::msp430;
1182  case ELF::EM_PPC:
1183    return Triple::ppc;
1184  case ELF::EM_PPC64:
1185    return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
1186  case ELF::EM_RISCV:
1187    switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
1188    case ELF::ELFCLASS32:
1189      return Triple::riscv32;
1190    case ELF::ELFCLASS64:
1191      return Triple::riscv64;
1192    default:
1193      report_fatal_error("Invalid ELFCLASS!");
1194    }
1195  case ELF::EM_S390:
1196    return Triple::systemz;
1197
1198  case ELF::EM_SPARC:
1199  case ELF::EM_SPARC32PLUS:
1200    return IsLittleEndian ? Triple::sparcel : Triple::sparc;
1201  case ELF::EM_SPARCV9:
1202    return Triple::sparcv9;
1203
1204  case ELF::EM_AMDGPU: {
1205    if (!IsLittleEndian)
1206      return Triple::UnknownArch;
1207
1208    unsigned MACH = EF.getHeader()->e_flags & ELF::EF_AMDGPU_MACH;
1209    if (MACH >= ELF::EF_AMDGPU_MACH_R600_FIRST &&
1210        MACH <= ELF::EF_AMDGPU_MACH_R600_LAST)
1211      return Triple::r600;
1212    if (MACH >= ELF::EF_AMDGPU_MACH_AMDGCN_FIRST &&
1213        MACH <= ELF::EF_AMDGPU_MACH_AMDGCN_LAST)
1214      return Triple::amdgcn;
1215
1216    return Triple::UnknownArch;
1217  }
1218
1219  case ELF::EM_BPF:
1220    return IsLittleEndian ? Triple::bpfel : Triple::bpfeb;
1221
1222  case ELF::EM_VE:
1223    return Triple::ve;
1224  default:
1225    return Triple::UnknownArch;
1226  }
1227}
1228
1229template <class ELFT>
1230Expected<uint64_t> ELFObjectFile<ELFT>::getStartAddress() const {
1231  return EF.getHeader()->e_entry;
1232}
1233
1234template <class ELFT>
1235ELFObjectFileBase::elf_symbol_iterator_range
1236ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
1237  return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
1238}
1239
1240template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
1241  return EF.getHeader()->e_type == ELF::ET_REL;
1242}
1243
1244} // end namespace object
1245} // end namespace llvm
1246
1247#endif // LLVM_OBJECT_ELFOBJECTFILE_H
1248