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/ARMBuildAttributes.h"
32 #include "llvm/Support/Casting.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 
41 namespace llvm {
42 namespace object {
43 
44 constexpr int NumElfSymbolTypes = 16;
45 extern const llvm::EnumEntry<unsigned> ElfSymbolTypes[NumElfSymbolTypes];
46 
47 class elf_symbol_iterator;
48 
49 class ELFObjectFileBase : public ObjectFile {
50   friend class ELFRelocationRef;
51   friend class ELFSectionRef;
52   friend class ELFSymbolRef;
53 
54 protected:
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(ARMAttributeParser &Attributes) const = 0;
68 
69 public:
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 
98 class ELFSectionRef : public SectionRef {
99 public:
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 
121 class elf_section_iterator : public section_iterator {
122 public:
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 
136 class ELFSymbolRef : public SymbolRef {
137 public:
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 
173 class elf_symbol_iterator : public symbol_iterator {
174 public:
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 
188 class ELFRelocationRef : public RelocationRef {
189 public:
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 
203 class elf_relocation_iterator : public relocation_iterator {
204 public:
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 
220 inline ELFObjectFileBase::elf_symbol_iterator_range
221 ELFObjectFileBase::symbols() const {
222   return elf_symbol_iterator_range(symbol_begin(), symbol_end());
223 }
224 
225 template <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 
230 public:
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 
246 private:
247   ELFObjectFile(MemoryBufferRef Object, ELFFile<ELFT> EF,
248                 const Elf_Shdr *DotDynSymSec, const Elf_Shdr *DotSymtabSec,
249                 ArrayRef<Elf_Word> ShndxTable);
250 
251 protected:
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   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   relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
289   relocation_iterator section_rel_end(DataRefImpl Sec) const override;
290   std::vector<SectionRef> dynamic_relocation_sections() const override;
291   Expected<section_iterator>
292   getRelocatedSection(DataRefImpl Sec) const override;
293 
294   void moveRelocationNext(DataRefImpl &Rel) const override;
295   uint64_t getRelocationOffset(DataRefImpl Rel) const override;
296   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
297   uint64_t getRelocationType(DataRefImpl Rel) const override;
298   void getRelocationTypeName(DataRefImpl Rel,
299                              SmallVectorImpl<char> &Result) const override;
300 
301   uint32_t getSectionType(DataRefImpl Sec) const override;
302   uint64_t getSectionFlags(DataRefImpl Sec) const override;
303   uint64_t getSectionOffset(DataRefImpl Sec) const override;
304   StringRef getRelocationTypeName(uint32_t Type) const;
305 
306   /// Get the relocation section that contains \a Rel.
307   const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
308     auto RelSecOrErr = EF.getSection(Rel.d.a);
309     if (!RelSecOrErr)
310       report_fatal_error(errorToErrorCode(RelSecOrErr.takeError()).message());
311     return *RelSecOrErr;
312   }
313 
314   DataRefImpl toDRI(const Elf_Shdr *SymTable, unsigned SymbolNum) const {
315     DataRefImpl DRI;
316     if (!SymTable) {
317       DRI.d.a = 0;
318       DRI.d.b = 0;
319       return DRI;
320     }
321     assert(SymTable->sh_type == ELF::SHT_SYMTAB ||
322            SymTable->sh_type == ELF::SHT_DYNSYM);
323 
324     auto SectionsOrErr = EF.sections();
325     if (!SectionsOrErr) {
326       DRI.d.a = 0;
327       DRI.d.b = 0;
328       return DRI;
329     }
330     uintptr_t SHT = reinterpret_cast<uintptr_t>((*SectionsOrErr).begin());
331     unsigned SymTableIndex =
332         (reinterpret_cast<uintptr_t>(SymTable) - SHT) / sizeof(Elf_Shdr);
333 
334     DRI.d.a = SymTableIndex;
335     DRI.d.b = SymbolNum;
336     return DRI;
337   }
338 
339   const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
340     return reinterpret_cast<const Elf_Shdr *>(Sec.p);
341   }
342 
343   DataRefImpl toDRI(const Elf_Shdr *Sec) const {
344     DataRefImpl DRI;
345     DRI.p = reinterpret_cast<uintptr_t>(Sec);
346     return DRI;
347   }
348 
349   DataRefImpl toDRI(const Elf_Dyn *Dyn) const {
350     DataRefImpl DRI;
351     DRI.p = reinterpret_cast<uintptr_t>(Dyn);
352     return DRI;
353   }
354 
355   bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
356     unsigned char Binding = ESym->getBinding();
357     unsigned char Visibility = ESym->getVisibility();
358 
359     // A symbol is exported if its binding is either GLOBAL or WEAK, and its
360     // visibility is either DEFAULT or PROTECTED. All other symbols are not
361     // exported.
362     return (
363         (Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK ||
364          Binding == ELF::STB_GNU_UNIQUE) &&
365         (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED));
366   }
367 
368   Error getBuildAttributes(ARMAttributeParser &Attributes) const override {
369     auto SectionsOrErr = EF.sections();
370     if (!SectionsOrErr)
371       return SectionsOrErr.takeError();
372 
373     for (const Elf_Shdr &Sec : *SectionsOrErr) {
374       if (Sec.sh_type == ELF::SHT_ARM_ATTRIBUTES) {
375         auto ErrorOrContents = EF.getSectionContents(&Sec);
376         if (!ErrorOrContents)
377           return ErrorOrContents.takeError();
378 
379         auto Contents = ErrorOrContents.get();
380         if (Contents[0] != ARMBuildAttrs::Format_Version || Contents.size() == 1)
381           return Error::success();
382 
383         Attributes.Parse(Contents, ELFT::TargetEndianness == support::little);
384         break;
385       }
386     }
387     return Error::success();
388   }
389 
390   // This flag is used for classof, to distinguish ELFObjectFile from
391   // its subclass. If more subclasses will be created, this flag will
392   // have to become an enum.
393   bool isDyldELFObject;
394 
395 public:
396   ELFObjectFile(ELFObjectFile<ELFT> &&Other);
397   static Expected<ELFObjectFile<ELFT>> create(MemoryBufferRef Object);
398 
399   const Elf_Rel *getRel(DataRefImpl Rel) const;
400   const Elf_Rela *getRela(DataRefImpl Rela) const;
401 
402   const Elf_Sym *getSymbol(DataRefImpl Sym) const {
403     auto Ret = EF.template getEntry<Elf_Sym>(Sym.d.a, Sym.d.b);
404     if (!Ret)
405       report_fatal_error(errorToErrorCode(Ret.takeError()).message());
406     return *Ret;
407   }
408 
409   const Elf_Shdr *getSection(DataRefImpl Sec) const {
410     return reinterpret_cast<const Elf_Shdr *>(Sec.p);
411   }
412 
413   basic_symbol_iterator symbol_begin() const override;
414   basic_symbol_iterator symbol_end() const override;
415 
416   elf_symbol_iterator dynamic_symbol_begin() const;
417   elf_symbol_iterator dynamic_symbol_end() const;
418 
419   section_iterator section_begin() const override;
420   section_iterator section_end() const override;
421 
422   Expected<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
423 
424   uint8_t getBytesInAddress() const override;
425   StringRef getFileFormatName() const override;
426   Triple::ArchType getArch() const override;
427   Expected<uint64_t> getStartAddress() const override;
428 
429   unsigned getPlatformFlags() const override { return EF.getHeader()->e_flags; }
430 
431   const ELFFile<ELFT> *getELFFile() const { return &EF; }
432 
433   bool isDyldType() const { return isDyldELFObject; }
434   static bool classof(const Binary *v) {
435     return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
436                                       ELFT::Is64Bits);
437   }
438 
439   elf_symbol_iterator_range getDynamicSymbolIterators() const override;
440 
441   bool isRelocatableObject() const override;
442 };
443 
444 using ELF32LEObjectFile = ELFObjectFile<ELF32LE>;
445 using ELF64LEObjectFile = ELFObjectFile<ELF64LE>;
446 using ELF32BEObjectFile = ELFObjectFile<ELF32BE>;
447 using ELF64BEObjectFile = ELFObjectFile<ELF64BE>;
448 
449 template <class ELFT>
450 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
451   ++Sym.d.b;
452 }
453 
454 template <class ELFT>
455 Expected<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const {
456   const Elf_Sym *ESym = getSymbol(Sym);
457   auto SymTabOrErr = EF.getSection(Sym.d.a);
458   if (!SymTabOrErr)
459     return SymTabOrErr.takeError();
460   const Elf_Shdr *SymTableSec = *SymTabOrErr;
461   auto StrTabOrErr = EF.getSection(SymTableSec->sh_link);
462   if (!StrTabOrErr)
463     return StrTabOrErr.takeError();
464   const Elf_Shdr *StringTableSec = *StrTabOrErr;
465   auto SymStrTabOrErr = EF.getStringTable(StringTableSec);
466   if (!SymStrTabOrErr)
467     return SymStrTabOrErr.takeError();
468   Expected<StringRef> Name = ESym->getName(*SymStrTabOrErr);
469   if (Name && !Name->empty())
470     return Name;
471 
472   // If the symbol name is empty use the section name.
473   if (ESym->getType() == ELF::STT_SECTION) {
474     if (Expected<section_iterator> SecOrErr = getSymbolSection(Sym)) {
475       consumeError(Name.takeError());
476       return (*SecOrErr)->getName();
477     }
478   }
479   return Name;
480 }
481 
482 template <class ELFT>
483 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
484   return getSection(Sec)->sh_flags;
485 }
486 
487 template <class ELFT>
488 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
489   return getSection(Sec)->sh_type;
490 }
491 
492 template <class ELFT>
493 uint64_t ELFObjectFile<ELFT>::getSectionOffset(DataRefImpl Sec) const {
494   return getSection(Sec)->sh_offset;
495 }
496 
497 template <class ELFT>
498 uint64_t ELFObjectFile<ELFT>::getSymbolValueImpl(DataRefImpl Symb) const {
499   const Elf_Sym *ESym = getSymbol(Symb);
500   uint64_t Ret = ESym->st_value;
501   if (ESym->st_shndx == ELF::SHN_ABS)
502     return Ret;
503 
504   const Elf_Ehdr *Header = EF.getHeader();
505   // Clear the ARM/Thumb or microMIPS indicator flag.
506   if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
507       ESym->getType() == ELF::STT_FUNC)
508     Ret &= ~1;
509 
510   return Ret;
511 }
512 
513 template <class ELFT>
514 Expected<uint64_t>
515 ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb) const {
516   uint64_t Result = getSymbolValue(Symb);
517   const Elf_Sym *ESym = getSymbol(Symb);
518   switch (ESym->st_shndx) {
519   case ELF::SHN_COMMON:
520   case ELF::SHN_UNDEF:
521   case ELF::SHN_ABS:
522     return Result;
523   }
524 
525   const Elf_Ehdr *Header = EF.getHeader();
526   auto SymTabOrErr = EF.getSection(Symb.d.a);
527   if (!SymTabOrErr)
528     return SymTabOrErr.takeError();
529   const Elf_Shdr *SymTab = *SymTabOrErr;
530 
531   if (Header->e_type == ELF::ET_REL) {
532     auto SectionOrErr = EF.getSection(ESym, SymTab, ShndxTable);
533     if (!SectionOrErr)
534       return SectionOrErr.takeError();
535     const Elf_Shdr *Section = *SectionOrErr;
536     if (Section)
537       Result += Section->sh_addr;
538   }
539 
540   return Result;
541 }
542 
543 template <class ELFT>
544 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
545   const Elf_Sym *Sym = getSymbol(Symb);
546   if (Sym->st_shndx == ELF::SHN_COMMON)
547     return Sym->st_value;
548   return 0;
549 }
550 
551 template <class ELFT>
552 uint16_t ELFObjectFile<ELFT>::getEMachine() const {
553   return EF.getHeader()->e_machine;
554 }
555 
556 template <class ELFT> uint16_t ELFObjectFile<ELFT>::getEType() const {
557   return EF.getHeader()->e_type;
558 }
559 
560 template <class ELFT>
561 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
562   return getSymbol(Sym)->st_size;
563 }
564 
565 template <class ELFT>
566 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
567   return getSymbol(Symb)->st_size;
568 }
569 
570 template <class ELFT>
571 uint8_t ELFObjectFile<ELFT>::getSymbolBinding(DataRefImpl Symb) const {
572   return getSymbol(Symb)->getBinding();
573 }
574 
575 template <class ELFT>
576 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
577   return getSymbol(Symb)->st_other;
578 }
579 
580 template <class ELFT>
581 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
582   return getSymbol(Symb)->getType();
583 }
584 
585 template <class ELFT>
586 Expected<SymbolRef::Type>
587 ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
588   const Elf_Sym *ESym = getSymbol(Symb);
589 
590   switch (ESym->getType()) {
591   case ELF::STT_NOTYPE:
592     return SymbolRef::ST_Unknown;
593   case ELF::STT_SECTION:
594     return SymbolRef::ST_Debug;
595   case ELF::STT_FILE:
596     return SymbolRef::ST_File;
597   case ELF::STT_FUNC:
598     return SymbolRef::ST_Function;
599   case ELF::STT_OBJECT:
600   case ELF::STT_COMMON:
601   case ELF::STT_TLS:
602     return SymbolRef::ST_Data;
603   default:
604     return SymbolRef::ST_Other;
605   }
606 }
607 
608 template <class ELFT>
609 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
610   const Elf_Sym *ESym = getSymbol(Sym);
611 
612   uint32_t Result = SymbolRef::SF_None;
613 
614   if (ESym->getBinding() != ELF::STB_LOCAL)
615     Result |= SymbolRef::SF_Global;
616 
617   if (ESym->getBinding() == ELF::STB_WEAK)
618     Result |= SymbolRef::SF_Weak;
619 
620   if (ESym->st_shndx == ELF::SHN_ABS)
621     Result |= SymbolRef::SF_Absolute;
622 
623   if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION)
624     Result |= SymbolRef::SF_FormatSpecific;
625 
626   auto DotSymtabSecSyms = EF.symbols(DotSymtabSec);
627   if (DotSymtabSecSyms && ESym == (*DotSymtabSecSyms).begin())
628     Result |= SymbolRef::SF_FormatSpecific;
629   auto DotDynSymSecSyms = EF.symbols(DotDynSymSec);
630   if (DotDynSymSecSyms && ESym == (*DotDynSymSecSyms).begin())
631     Result |= SymbolRef::SF_FormatSpecific;
632 
633   if (EF.getHeader()->e_machine == ELF::EM_ARM) {
634     if (Expected<StringRef> NameOrErr = getSymbolName(Sym)) {
635       StringRef Name = *NameOrErr;
636       if (Name.startswith("$d") || Name.startswith("$t") ||
637           Name.startswith("$a"))
638         Result |= SymbolRef::SF_FormatSpecific;
639     } else {
640       // TODO: Actually report errors helpfully.
641       consumeError(NameOrErr.takeError());
642     }
643     if (ESym->getType() == ELF::STT_FUNC && (ESym->st_value & 1) == 1)
644       Result |= SymbolRef::SF_Thumb;
645   }
646 
647   if (ESym->st_shndx == ELF::SHN_UNDEF)
648     Result |= SymbolRef::SF_Undefined;
649 
650   if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
651     Result |= SymbolRef::SF_Common;
652 
653   if (isExportedToOtherDSO(ESym))
654     Result |= SymbolRef::SF_Exported;
655 
656   if (ESym->getVisibility() == ELF::STV_HIDDEN)
657     Result |= SymbolRef::SF_Hidden;
658 
659   return Result;
660 }
661 
662 template <class ELFT>
663 Expected<section_iterator>
664 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym,
665                                       const Elf_Shdr *SymTab) const {
666   auto ESecOrErr = EF.getSection(ESym, SymTab, ShndxTable);
667   if (!ESecOrErr)
668     return ESecOrErr.takeError();
669 
670   const Elf_Shdr *ESec = *ESecOrErr;
671   if (!ESec)
672     return section_end();
673 
674   DataRefImpl Sec;
675   Sec.p = reinterpret_cast<intptr_t>(ESec);
676   return section_iterator(SectionRef(Sec, this));
677 }
678 
679 template <class ELFT>
680 Expected<section_iterator>
681 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb) const {
682   const Elf_Sym *Sym = getSymbol(Symb);
683   auto SymTabOrErr = EF.getSection(Symb.d.a);
684   if (!SymTabOrErr)
685     return SymTabOrErr.takeError();
686   const Elf_Shdr *SymTab = *SymTabOrErr;
687   return getSymbolSection(Sym, SymTab);
688 }
689 
690 template <class ELFT>
691 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
692   const Elf_Shdr *ESec = getSection(Sec);
693   Sec = toDRI(++ESec);
694 }
695 
696 template <class ELFT>
697 Expected<StringRef> ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec) const {
698   return EF.getSectionName(&*getSection(Sec));
699 }
700 
701 template <class ELFT>
702 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
703   return getSection(Sec)->sh_addr;
704 }
705 
706 template <class ELFT>
707 uint64_t ELFObjectFile<ELFT>::getSectionIndex(DataRefImpl Sec) const {
708   auto SectionsOrErr = EF.sections();
709   handleAllErrors(std::move(SectionsOrErr.takeError()),
710                   [](const ErrorInfoBase &) {
711                     llvm_unreachable("unable to get section index");
712                   });
713   const Elf_Shdr *First = SectionsOrErr->begin();
714   return getSection(Sec) - First;
715 }
716 
717 template <class ELFT>
718 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
719   return getSection(Sec)->sh_size;
720 }
721 
722 template <class ELFT>
723 Expected<ArrayRef<uint8_t>>
724 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec) const {
725   const Elf_Shdr *EShdr = getSection(Sec);
726   if (EShdr->sh_type == ELF::SHT_NOBITS)
727     return makeArrayRef((const uint8_t *)base(), 0);
728   if (std::error_code EC =
729           checkOffset(getMemoryBufferRef(),
730                       (uintptr_t)base() + EShdr->sh_offset, EShdr->sh_size))
731     return errorCodeToError(EC);
732   return makeArrayRef((const uint8_t *)base() + EShdr->sh_offset,
733                       EShdr->sh_size);
734 }
735 
736 template <class ELFT>
737 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
738   return getSection(Sec)->sh_addralign;
739 }
740 
741 template <class ELFT>
742 bool ELFObjectFile<ELFT>::isSectionCompressed(DataRefImpl Sec) const {
743   return getSection(Sec)->sh_flags & ELF::SHF_COMPRESSED;
744 }
745 
746 template <class ELFT>
747 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
748   return getSection(Sec)->sh_flags & ELF::SHF_EXECINSTR;
749 }
750 
751 template <class ELFT>
752 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
753   const Elf_Shdr *EShdr = getSection(Sec);
754   return EShdr->sh_type == ELF::SHT_PROGBITS &&
755          EShdr->sh_flags & ELF::SHF_ALLOC &&
756          !(EShdr->sh_flags & ELF::SHF_EXECINSTR);
757 }
758 
759 template <class ELFT>
760 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
761   const Elf_Shdr *EShdr = getSection(Sec);
762   return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
763          EShdr->sh_type == ELF::SHT_NOBITS;
764 }
765 
766 template <class ELFT>
767 std::vector<SectionRef>
768 ELFObjectFile<ELFT>::dynamic_relocation_sections() const {
769   std::vector<SectionRef> Res;
770   std::vector<uintptr_t> Offsets;
771 
772   auto SectionsOrErr = EF.sections();
773   if (!SectionsOrErr)
774     return Res;
775 
776   for (const Elf_Shdr &Sec : *SectionsOrErr) {
777     if (Sec.sh_type != ELF::SHT_DYNAMIC)
778       continue;
779     Elf_Dyn *Dynamic =
780         reinterpret_cast<Elf_Dyn *>((uintptr_t)base() + Sec.sh_offset);
781     for (; Dynamic->d_tag != ELF::DT_NULL; Dynamic++) {
782       if (Dynamic->d_tag == ELF::DT_REL || Dynamic->d_tag == ELF::DT_RELA ||
783           Dynamic->d_tag == ELF::DT_JMPREL) {
784         Offsets.push_back(Dynamic->d_un.d_val);
785       }
786     }
787   }
788   for (const Elf_Shdr &Sec : *SectionsOrErr) {
789     if (is_contained(Offsets, Sec.sh_addr))
790       Res.emplace_back(toDRI(&Sec), this);
791   }
792   return Res;
793 }
794 
795 template <class ELFT>
796 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
797   return getSection(Sec)->sh_type == ELF::SHT_NOBITS;
798 }
799 
800 template <class ELFT>
801 bool ELFObjectFile<ELFT>::isBerkeleyText(DataRefImpl Sec) const {
802   return getSection(Sec)->sh_flags & ELF::SHF_ALLOC &&
803          (getSection(Sec)->sh_flags & ELF::SHF_EXECINSTR ||
804           !(getSection(Sec)->sh_flags & ELF::SHF_WRITE));
805 }
806 
807 template <class ELFT>
808 bool ELFObjectFile<ELFT>::isBerkeleyData(DataRefImpl Sec) const {
809   const Elf_Shdr *EShdr = getSection(Sec);
810   return !isBerkeleyText(Sec) && EShdr->sh_type != ELF::SHT_NOBITS &&
811          EShdr->sh_flags & ELF::SHF_ALLOC;
812 }
813 
814 template <class ELFT>
815 relocation_iterator
816 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
817   DataRefImpl RelData;
818   auto SectionsOrErr = EF.sections();
819   if (!SectionsOrErr)
820     return relocation_iterator(RelocationRef());
821   uintptr_t SHT = reinterpret_cast<uintptr_t>((*SectionsOrErr).begin());
822   RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
823   RelData.d.b = 0;
824   return relocation_iterator(RelocationRef(RelData, this));
825 }
826 
827 template <class ELFT>
828 relocation_iterator
829 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
830   const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
831   relocation_iterator Begin = section_rel_begin(Sec);
832   if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
833     return Begin;
834   DataRefImpl RelData = Begin->getRawDataRefImpl();
835   const Elf_Shdr *RelSec = getRelSection(RelData);
836 
837   // Error check sh_link here so that getRelocationSymbol can just use it.
838   auto SymSecOrErr = EF.getSection(RelSec->sh_link);
839   if (!SymSecOrErr)
840     report_fatal_error(errorToErrorCode(SymSecOrErr.takeError()).message());
841 
842   RelData.d.b += S->sh_size / S->sh_entsize;
843   return relocation_iterator(RelocationRef(RelData, this));
844 }
845 
846 template <class ELFT>
847 Expected<section_iterator>
848 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
849   if (EF.getHeader()->e_type != ELF::ET_REL)
850     return section_end();
851 
852   const Elf_Shdr *EShdr = getSection(Sec);
853   uintX_t Type = EShdr->sh_type;
854   if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
855     return section_end();
856 
857   Expected<const Elf_Shdr *> SecOrErr = EF.getSection(EShdr->sh_info);
858   if (!SecOrErr)
859     return SecOrErr.takeError();
860   return section_iterator(SectionRef(toDRI(*SecOrErr), this));
861 }
862 
863 // Relocations
864 template <class ELFT>
865 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
866   ++Rel.d.b;
867 }
868 
869 template <class ELFT>
870 symbol_iterator
871 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
872   uint32_t symbolIdx;
873   const Elf_Shdr *sec = getRelSection(Rel);
874   if (sec->sh_type == ELF::SHT_REL)
875     symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
876   else
877     symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
878   if (!symbolIdx)
879     return symbol_end();
880 
881   // FIXME: error check symbolIdx
882   DataRefImpl SymbolData;
883   SymbolData.d.a = sec->sh_link;
884   SymbolData.d.b = symbolIdx;
885   return symbol_iterator(SymbolRef(SymbolData, this));
886 }
887 
888 template <class ELFT>
889 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
890   const Elf_Shdr *sec = getRelSection(Rel);
891   if (sec->sh_type == ELF::SHT_REL)
892     return getRel(Rel)->r_offset;
893 
894   return getRela(Rel)->r_offset;
895 }
896 
897 template <class ELFT>
898 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
899   const Elf_Shdr *sec = getRelSection(Rel);
900   if (sec->sh_type == ELF::SHT_REL)
901     return getRel(Rel)->getType(EF.isMips64EL());
902   else
903     return getRela(Rel)->getType(EF.isMips64EL());
904 }
905 
906 template <class ELFT>
907 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
908   return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
909 }
910 
911 template <class ELFT>
912 void ELFObjectFile<ELFT>::getRelocationTypeName(
913     DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
914   uint32_t type = getRelocationType(Rel);
915   EF.getRelocationTypeName(type, Result);
916 }
917 
918 template <class ELFT>
919 Expected<int64_t>
920 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
921   if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
922     return createError("Section is not SHT_RELA");
923   return (int64_t)getRela(Rel)->r_addend;
924 }
925 
926 template <class ELFT>
927 const typename ELFObjectFile<ELFT>::Elf_Rel *
928 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
929   assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
930   auto Ret = EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
931   if (!Ret)
932     report_fatal_error(errorToErrorCode(Ret.takeError()).message());
933   return *Ret;
934 }
935 
936 template <class ELFT>
937 const typename ELFObjectFile<ELFT>::Elf_Rela *
938 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
939   assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
940   auto Ret = EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
941   if (!Ret)
942     report_fatal_error(errorToErrorCode(Ret.takeError()).message());
943   return *Ret;
944 }
945 
946 template <class ELFT>
947 Expected<ELFObjectFile<ELFT>>
948 ELFObjectFile<ELFT>::create(MemoryBufferRef Object) {
949   auto EFOrErr = ELFFile<ELFT>::create(Object.getBuffer());
950   if (Error E = EFOrErr.takeError())
951     return std::move(E);
952   auto EF = std::move(*EFOrErr);
953 
954   auto SectionsOrErr = EF.sections();
955   if (!SectionsOrErr)
956     return SectionsOrErr.takeError();
957 
958   const Elf_Shdr *DotDynSymSec = nullptr;
959   const Elf_Shdr *DotSymtabSec = nullptr;
960   ArrayRef<Elf_Word> ShndxTable;
961   for (const Elf_Shdr &Sec : *SectionsOrErr) {
962     switch (Sec.sh_type) {
963     case ELF::SHT_DYNSYM: {
964       if (!DotDynSymSec)
965         DotDynSymSec = &Sec;
966       break;
967     }
968     case ELF::SHT_SYMTAB: {
969       if (!DotSymtabSec)
970         DotSymtabSec = &Sec;
971       break;
972     }
973     case ELF::SHT_SYMTAB_SHNDX: {
974       auto TableOrErr = EF.getSHNDXTable(Sec);
975       if (!TableOrErr)
976         return TableOrErr.takeError();
977       ShndxTable = *TableOrErr;
978       break;
979     }
980     }
981   }
982   return ELFObjectFile<ELFT>(Object, EF, DotDynSymSec, DotSymtabSec,
983                              ShndxTable);
984 }
985 
986 template <class ELFT>
987 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, ELFFile<ELFT> EF,
988                                    const Elf_Shdr *DotDynSymSec,
989                                    const Elf_Shdr *DotSymtabSec,
990                                    ArrayRef<Elf_Word> ShndxTable)
991     : ELFObjectFileBase(
992           getELFType(ELFT::TargetEndianness == support::little, ELFT::Is64Bits),
993           Object),
994       EF(EF), DotDynSymSec(DotDynSymSec), DotSymtabSec(DotSymtabSec),
995       ShndxTable(ShndxTable) {}
996 
997 template <class ELFT>
998 ELFObjectFile<ELFT>::ELFObjectFile(ELFObjectFile<ELFT> &&Other)
999     : ELFObjectFile(Other.Data, Other.EF, Other.DotDynSymSec,
1000                     Other.DotSymtabSec, Other.ShndxTable) {}
1001 
1002 template <class ELFT>
1003 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin() const {
1004   DataRefImpl Sym =
1005       toDRI(DotSymtabSec,
1006             DotSymtabSec && DotSymtabSec->sh_size >= sizeof(Elf_Sym) ? 1 : 0);
1007   return basic_symbol_iterator(SymbolRef(Sym, this));
1008 }
1009 
1010 template <class ELFT>
1011 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end() const {
1012   const Elf_Shdr *SymTab = DotSymtabSec;
1013   if (!SymTab)
1014     return symbol_begin();
1015   DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
1016   return basic_symbol_iterator(SymbolRef(Sym, this));
1017 }
1018 
1019 template <class ELFT>
1020 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
1021   DataRefImpl Sym = toDRI(DotDynSymSec, 0);
1022   return symbol_iterator(SymbolRef(Sym, this));
1023 }
1024 
1025 template <class ELFT>
1026 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
1027   const Elf_Shdr *SymTab = DotDynSymSec;
1028   if (!SymTab)
1029     return dynamic_symbol_begin();
1030   DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
1031   return basic_symbol_iterator(SymbolRef(Sym, this));
1032 }
1033 
1034 template <class ELFT>
1035 section_iterator ELFObjectFile<ELFT>::section_begin() const {
1036   auto SectionsOrErr = EF.sections();
1037   if (!SectionsOrErr)
1038     return section_iterator(SectionRef());
1039   return section_iterator(SectionRef(toDRI((*SectionsOrErr).begin()), this));
1040 }
1041 
1042 template <class ELFT>
1043 section_iterator ELFObjectFile<ELFT>::section_end() const {
1044   auto SectionsOrErr = EF.sections();
1045   if (!SectionsOrErr)
1046     return section_iterator(SectionRef());
1047   return section_iterator(SectionRef(toDRI((*SectionsOrErr).end()), this));
1048 }
1049 
1050 template <class ELFT>
1051 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
1052   return ELFT::Is64Bits ? 8 : 4;
1053 }
1054 
1055 template <class ELFT>
1056 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
1057   bool IsLittleEndian = ELFT::TargetEndianness == support::little;
1058   switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
1059   case ELF::ELFCLASS32:
1060     switch (EF.getHeader()->e_machine) {
1061     case ELF::EM_386:
1062       return "ELF32-i386";
1063     case ELF::EM_IAMCU:
1064       return "ELF32-iamcu";
1065     case ELF::EM_X86_64:
1066       return "ELF32-x86-64";
1067     case ELF::EM_ARM:
1068       return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
1069     case ELF::EM_AVR:
1070       return "ELF32-avr";
1071     case ELF::EM_HEXAGON:
1072       return "ELF32-hexagon";
1073     case ELF::EM_LANAI:
1074       return "ELF32-lanai";
1075     case ELF::EM_MIPS:
1076       return "ELF32-mips";
1077     case ELF::EM_MSP430:
1078       return "ELF32-msp430";
1079     case ELF::EM_PPC:
1080       return "ELF32-ppc";
1081     case ELF::EM_RISCV:
1082       return "ELF32-riscv";
1083     case ELF::EM_SPARC:
1084     case ELF::EM_SPARC32PLUS:
1085       return "ELF32-sparc";
1086     case ELF::EM_AMDGPU:
1087       return "ELF32-amdgpu";
1088     default:
1089       return "ELF32-unknown";
1090     }
1091   case ELF::ELFCLASS64:
1092     switch (EF.getHeader()->e_machine) {
1093     case ELF::EM_386:
1094       return "ELF64-i386";
1095     case ELF::EM_X86_64:
1096       return "ELF64-x86-64";
1097     case ELF::EM_AARCH64:
1098       return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
1099     case ELF::EM_PPC64:
1100       return "ELF64-ppc64";
1101     case ELF::EM_RISCV:
1102       return "ELF64-riscv";
1103     case ELF::EM_S390:
1104       return "ELF64-s390";
1105     case ELF::EM_SPARCV9:
1106       return "ELF64-sparc";
1107     case ELF::EM_MIPS:
1108       return "ELF64-mips";
1109     case ELF::EM_AMDGPU:
1110       return "ELF64-amdgpu";
1111     case ELF::EM_BPF:
1112       return "ELF64-BPF";
1113     default:
1114       return "ELF64-unknown";
1115     }
1116   default:
1117     // FIXME: Proper error handling.
1118     report_fatal_error("Invalid ELFCLASS!");
1119   }
1120 }
1121 
1122 template <class ELFT> Triple::ArchType ELFObjectFile<ELFT>::getArch() const {
1123   bool IsLittleEndian = ELFT::TargetEndianness == support::little;
1124   switch (EF.getHeader()->e_machine) {
1125   case ELF::EM_386:
1126   case ELF::EM_IAMCU:
1127     return Triple::x86;
1128   case ELF::EM_X86_64:
1129     return Triple::x86_64;
1130   case ELF::EM_AARCH64:
1131     return IsLittleEndian ? Triple::aarch64 : Triple::aarch64_be;
1132   case ELF::EM_ARM:
1133     return Triple::arm;
1134   case ELF::EM_AVR:
1135     return Triple::avr;
1136   case ELF::EM_HEXAGON:
1137     return Triple::hexagon;
1138   case ELF::EM_LANAI:
1139     return Triple::lanai;
1140   case ELF::EM_MIPS:
1141     switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
1142     case ELF::ELFCLASS32:
1143       return IsLittleEndian ? Triple::mipsel : Triple::mips;
1144     case ELF::ELFCLASS64:
1145       return IsLittleEndian ? Triple::mips64el : Triple::mips64;
1146     default:
1147       report_fatal_error("Invalid ELFCLASS!");
1148     }
1149   case ELF::EM_MSP430:
1150     return Triple::msp430;
1151   case ELF::EM_PPC:
1152     return Triple::ppc;
1153   case ELF::EM_PPC64:
1154     return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
1155   case ELF::EM_RISCV:
1156     switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
1157     case ELF::ELFCLASS32:
1158       return Triple::riscv32;
1159     case ELF::ELFCLASS64:
1160       return Triple::riscv64;
1161     default:
1162       report_fatal_error("Invalid ELFCLASS!");
1163     }
1164   case ELF::EM_S390:
1165     return Triple::systemz;
1166 
1167   case ELF::EM_SPARC:
1168   case ELF::EM_SPARC32PLUS:
1169     return IsLittleEndian ? Triple::sparcel : Triple::sparc;
1170   case ELF::EM_SPARCV9:
1171     return Triple::sparcv9;
1172 
1173   case ELF::EM_AMDGPU: {
1174     if (!IsLittleEndian)
1175       return Triple::UnknownArch;
1176 
1177     unsigned MACH = EF.getHeader()->e_flags & ELF::EF_AMDGPU_MACH;
1178     if (MACH >= ELF::EF_AMDGPU_MACH_R600_FIRST &&
1179         MACH <= ELF::EF_AMDGPU_MACH_R600_LAST)
1180       return Triple::r600;
1181     if (MACH >= ELF::EF_AMDGPU_MACH_AMDGCN_FIRST &&
1182         MACH <= ELF::EF_AMDGPU_MACH_AMDGCN_LAST)
1183       return Triple::amdgcn;
1184 
1185     return Triple::UnknownArch;
1186   }
1187 
1188   case ELF::EM_BPF:
1189     return IsLittleEndian ? Triple::bpfel : Triple::bpfeb;
1190 
1191   default:
1192     return Triple::UnknownArch;
1193   }
1194 }
1195 
1196 template <class ELFT>
1197 Expected<uint64_t> ELFObjectFile<ELFT>::getStartAddress() const {
1198   return EF.getHeader()->e_entry;
1199 }
1200 
1201 template <class ELFT>
1202 ELFObjectFileBase::elf_symbol_iterator_range
1203 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
1204   return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
1205 }
1206 
1207 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
1208   return EF.getHeader()->e_type == ELF::ET_REL;
1209 }
1210 
1211 } // end namespace object
1212 } // end namespace llvm
1213 
1214 #endif // LLVM_OBJECT_ELFOBJECTFILE_H
1215