1 //===- ELFObjectFile.h - ELF object file implementation ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the ELFObjectFile template class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_OBJECT_ELFOBJECTFILE_H
15 #define LLVM_OBJECT_ELFOBJECTFILE_H
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/ADT/PointerIntPair.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/ADT/StringSwitch.h"
21 #include "llvm/ADT/Triple.h"
22 #include "llvm/Object/ELF.h"
23 #include "llvm/Object/ObjectFile.h"
24 #include "llvm/Support/Casting.h"
25 #include "llvm/Support/ELF.h"
26 #include "llvm/Support/Endian.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/MemoryBuffer.h"
29 #include "llvm/Support/raw_ostream.h"
38 class elf_symbol_iterator;
40 class ELFRelocationRef;
42 class ELFObjectFileBase : public ObjectFile {
43 friend class ELFSymbolRef;
44 friend class ELFSectionRef;
45 friend class ELFRelocationRef;
48 ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source);
50 virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
51 virtual uint8_t getSymbolOther(DataRefImpl Symb) const = 0;
52 virtual uint8_t getSymbolELFType(DataRefImpl Symb) const = 0;
54 virtual uint32_t getSectionType(DataRefImpl Sec) const = 0;
55 virtual uint64_t getSectionFlags(DataRefImpl Sec) const = 0;
57 virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
60 typedef iterator_range<elf_symbol_iterator> elf_symbol_iterator_range;
61 virtual elf_symbol_iterator_range getDynamicSymbolIterators() const = 0;
63 elf_symbol_iterator_range symbols() const;
65 static inline bool classof(const Binary *v) { return v->isELF(); }
68 class ELFSectionRef : public SectionRef {
70 ELFSectionRef(const SectionRef &B) : SectionRef(B) {
71 assert(isa<ELFObjectFileBase>(SectionRef::getObject()));
74 const ELFObjectFileBase *getObject() const {
75 return cast<ELFObjectFileBase>(SectionRef::getObject());
78 uint32_t getType() const {
79 return getObject()->getSectionType(getRawDataRefImpl());
82 uint64_t getFlags() const {
83 return getObject()->getSectionFlags(getRawDataRefImpl());
87 class elf_section_iterator : public section_iterator {
89 elf_section_iterator(const section_iterator &B) : section_iterator(B) {
90 assert(isa<ELFObjectFileBase>(B->getObject()));
93 const ELFSectionRef *operator->() const {
94 return static_cast<const ELFSectionRef *>(section_iterator::operator->());
97 const ELFSectionRef &operator*() const {
98 return static_cast<const ELFSectionRef &>(section_iterator::operator*());
102 class ELFSymbolRef : public SymbolRef {
104 ELFSymbolRef(const SymbolRef &B) : SymbolRef(B) {
105 assert(isa<ELFObjectFileBase>(SymbolRef::getObject()));
108 const ELFObjectFileBase *getObject() const {
109 return cast<ELFObjectFileBase>(BasicSymbolRef::getObject());
112 uint64_t getSize() const {
113 return getObject()->getSymbolSize(getRawDataRefImpl());
116 uint8_t getOther() const {
117 return getObject()->getSymbolOther(getRawDataRefImpl());
120 uint8_t getELFType() const {
121 return getObject()->getSymbolELFType(getRawDataRefImpl());
125 class elf_symbol_iterator : public symbol_iterator {
127 elf_symbol_iterator(const basic_symbol_iterator &B)
128 : symbol_iterator(SymbolRef(B->getRawDataRefImpl(),
129 cast<ELFObjectFileBase>(B->getObject()))) {}
131 const ELFSymbolRef *operator->() const {
132 return static_cast<const ELFSymbolRef *>(symbol_iterator::operator->());
135 const ELFSymbolRef &operator*() const {
136 return static_cast<const ELFSymbolRef &>(symbol_iterator::operator*());
140 class ELFRelocationRef : public RelocationRef {
142 ELFRelocationRef(const RelocationRef &B) : RelocationRef(B) {
143 assert(isa<ELFObjectFileBase>(RelocationRef::getObject()));
146 const ELFObjectFileBase *getObject() const {
147 return cast<ELFObjectFileBase>(RelocationRef::getObject());
150 ErrorOr<int64_t> getAddend() const {
151 return getObject()->getRelocationAddend(getRawDataRefImpl());
155 class elf_relocation_iterator : public relocation_iterator {
157 elf_relocation_iterator(const relocation_iterator &B)
158 : relocation_iterator(RelocationRef(
159 B->getRawDataRefImpl(), cast<ELFObjectFileBase>(B->getObject()))) {}
161 const ELFRelocationRef *operator->() const {
162 return static_cast<const ELFRelocationRef *>(
163 relocation_iterator::operator->());
166 const ELFRelocationRef &operator*() const {
167 return static_cast<const ELFRelocationRef &>(
168 relocation_iterator::operator*());
172 inline ELFObjectFileBase::elf_symbol_iterator_range
173 ELFObjectFileBase::symbols() const {
174 return elf_symbol_iterator_range(symbol_begin(), symbol_end());
177 template <class ELFT> class ELFObjectFile : public ELFObjectFileBase {
178 uint64_t getSymbolSize(DataRefImpl Sym) const override;
181 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
183 typedef typename ELFFile<ELFT>::uintX_t uintX_t;
185 typedef typename ELFFile<ELFT>::Elf_Sym Elf_Sym;
186 typedef typename ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
187 typedef typename ELFFile<ELFT>::Elf_Ehdr Elf_Ehdr;
188 typedef typename ELFFile<ELFT>::Elf_Rel Elf_Rel;
189 typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela;
190 typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn;
195 const Elf_Shdr *DotDynSymSec = nullptr; // Dynamic symbol table section.
197 void moveSymbolNext(DataRefImpl &Symb) const override;
198 ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override;
199 ErrorOr<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
200 uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
201 uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
202 uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
203 uint32_t getSymbolFlags(DataRefImpl Symb) const override;
204 uint8_t getSymbolOther(DataRefImpl Symb) const override;
205 uint8_t getSymbolELFType(DataRefImpl Symb) const override;
206 SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
207 ErrorOr<section_iterator> getSymbolSection(const Elf_Sym *Symb) const;
208 ErrorOr<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
210 void moveSectionNext(DataRefImpl &Sec) const override;
211 std::error_code getSectionName(DataRefImpl Sec,
212 StringRef &Res) const override;
213 uint64_t getSectionAddress(DataRefImpl Sec) const override;
214 uint64_t getSectionSize(DataRefImpl Sec) const override;
215 std::error_code getSectionContents(DataRefImpl Sec,
216 StringRef &Res) const override;
217 uint64_t getSectionAlignment(DataRefImpl Sec) const override;
218 bool isSectionText(DataRefImpl Sec) const override;
219 bool isSectionData(DataRefImpl Sec) const override;
220 bool isSectionBSS(DataRefImpl Sec) const override;
221 bool isSectionVirtual(DataRefImpl Sec) const override;
222 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
223 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
224 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
226 void moveRelocationNext(DataRefImpl &Rel) const override;
227 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
228 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
229 uint64_t getRelocationType(DataRefImpl Rel) const override;
230 void getRelocationTypeName(DataRefImpl Rel,
231 SmallVectorImpl<char> &Result) const override;
233 uint32_t getSectionType(DataRefImpl Sec) const override;
234 uint64_t getSectionFlags(DataRefImpl Sec) const override;
235 StringRef getRelocationTypeName(uint32_t Type) const;
237 /// \brief Get the relocation section that contains \a Rel.
238 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
239 return *EF.getSection(Rel.d.a);
242 const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
243 return EF.template getEntry<Elf_Sym>(Sym.d.a, Sym.d.b);
246 DataRefImpl toDRI(const Elf_Shdr *SymTable, unsigned SymbolNum) const {
253 assert(SymTable->sh_type == ELF::SHT_SYMTAB ||
254 SymTable->sh_type == ELF::SHT_DYNSYM);
256 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
257 unsigned SymTableIndex =
258 (reinterpret_cast<uintptr_t>(SymTable) - SHT) / sizeof(Elf_Shdr);
260 DRI.d.a = SymTableIndex;
265 const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
266 return reinterpret_cast<const Elf_Shdr *>(Sec.p);
269 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
271 DRI.p = reinterpret_cast<uintptr_t>(Sec);
275 DataRefImpl toDRI(const Elf_Dyn *Dyn) const {
277 DRI.p = reinterpret_cast<uintptr_t>(Dyn);
281 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
282 unsigned char Binding = ESym->getBinding();
283 unsigned char Visibility = ESym->getVisibility();
285 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
286 // visibility is either DEFAULT or PROTECTED. All other symbols are not
288 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
289 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
295 // This flag is used for classof, to distinguish ELFObjectFile from
296 // its subclass. If more subclasses will be created, this flag will
297 // have to become an enum.
298 bool isDyldELFObject;
301 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
303 const Elf_Rel *getRel(DataRefImpl Rel) const;
304 const Elf_Rela *getRela(DataRefImpl Rela) const;
306 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
308 basic_symbol_iterator symbol_begin_impl() const override;
309 basic_symbol_iterator symbol_end_impl() const override;
311 elf_symbol_iterator dynamic_symbol_begin() const;
312 elf_symbol_iterator dynamic_symbol_end() const;
314 section_iterator section_begin() const override;
315 section_iterator section_end() const override;
317 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
319 uint8_t getBytesInAddress() const override;
320 StringRef getFileFormatName() const override;
321 unsigned getArch() const override;
323 std::error_code getPlatformFlags(unsigned &Result) const override {
324 Result = EF.getHeader()->e_flags;
325 return std::error_code();
328 const ELFFile<ELFT> *getELFFile() const { return &EF; }
330 bool isDyldType() const { return isDyldELFObject; }
331 static inline bool classof(const Binary *v) {
332 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
336 elf_symbol_iterator_range getDynamicSymbolIterators() const override;
338 bool isRelocatableObject() const override;
341 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
342 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
343 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
344 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
346 template <class ELFT>
347 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
351 template <class ELFT>
352 ErrorOr<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const {
353 const Elf_Sym *ESym = toELFSymIter(Sym);
354 const Elf_Shdr *SymTableSec = *EF.getSection(Sym.d.a);
355 const Elf_Shdr *StringTableSec = *EF.getSection(SymTableSec->sh_link);
356 StringRef SymTable = *EF.getStringTable(StringTableSec);
357 return ESym->getName(SymTable);
360 template <class ELFT>
361 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
362 return toELFShdrIter(Sec)->sh_flags;
365 template <class ELFT>
366 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
367 return toELFShdrIter(Sec)->sh_type;
370 template <class ELFT>
371 uint64_t ELFObjectFile<ELFT>::getSymbolValueImpl(DataRefImpl Symb) const {
372 const Elf_Sym *ESym = getSymbol(Symb);
373 uint64_t Ret = ESym->st_value;
374 if (ESym->st_shndx == ELF::SHN_ABS)
377 const Elf_Ehdr *Header = EF.getHeader();
378 // Clear the ARM/Thumb or microMIPS indicator flag.
379 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
380 ESym->getType() == ELF::STT_FUNC)
386 template <class ELFT>
388 ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb) const {
389 uint64_t Result = getSymbolValue(Symb);
390 const Elf_Sym *ESym = getSymbol(Symb);
391 switch (ESym->st_shndx) {
392 case ELF::SHN_COMMON:
398 const Elf_Ehdr *Header = EF.getHeader();
400 if (Header->e_type == ELF::ET_REL) {
401 ErrorOr<const Elf_Shdr *> SectionOrErr = EF.getSection(ESym);
402 if (std::error_code EC = SectionOrErr.getError())
404 const Elf_Shdr *Section = *SectionOrErr;
406 Result += Section->sh_addr;
412 template <class ELFT>
413 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
414 const Elf_Sym *Sym = toELFSymIter(Symb);
415 if (Sym->st_shndx == ELF::SHN_COMMON)
416 return Sym->st_value;
420 template <class ELFT>
421 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
422 return toELFSymIter(Sym)->st_size;
425 template <class ELFT>
426 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
427 return toELFSymIter(Symb)->st_size;
430 template <class ELFT>
431 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
432 return toELFSymIter(Symb)->st_other;
435 template <class ELFT>
436 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
437 return toELFSymIter(Symb)->getType();
440 template <class ELFT>
441 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
442 const Elf_Sym *ESym = getSymbol(Symb);
444 switch (ESym->getType()) {
445 case ELF::STT_NOTYPE:
446 return SymbolRef::ST_Unknown;
447 case ELF::STT_SECTION:
448 return SymbolRef::ST_Debug;
450 return SymbolRef::ST_File;
452 return SymbolRef::ST_Function;
453 case ELF::STT_OBJECT:
454 case ELF::STT_COMMON:
456 return SymbolRef::ST_Data;
458 return SymbolRef::ST_Other;
462 template <class ELFT>
463 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
464 const Elf_Sym *ESym = toELFSymIter(Sym);
466 uint32_t Result = SymbolRef::SF_None;
468 if (ESym->getBinding() != ELF::STB_LOCAL)
469 Result |= SymbolRef::SF_Global;
471 if (ESym->getBinding() == ELF::STB_WEAK)
472 Result |= SymbolRef::SF_Weak;
474 if (ESym->st_shndx == ELF::SHN_ABS)
475 Result |= SymbolRef::SF_Absolute;
477 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
478 ESym == EF.symbol_begin(EF.getDotSymtabSec()) ||
479 ESym == EF.symbol_begin(DotDynSymSec))
480 Result |= SymbolRef::SF_FormatSpecific;
482 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
483 if (ErrorOr<StringRef> NameOrErr = getSymbolName(Sym)) {
484 StringRef Name = *NameOrErr;
485 if (Name.startswith("$d") || Name.startswith("$t") ||
486 Name.startswith("$a"))
487 Result |= SymbolRef::SF_FormatSpecific;
491 if (ESym->st_shndx == ELF::SHN_UNDEF)
492 Result |= SymbolRef::SF_Undefined;
494 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
495 Result |= SymbolRef::SF_Common;
497 if (isExportedToOtherDSO(ESym))
498 Result |= SymbolRef::SF_Exported;
500 if (ESym->getVisibility() == ELF::STV_HIDDEN)
501 Result |= SymbolRef::SF_Hidden;
506 template <class ELFT>
507 ErrorOr<section_iterator>
508 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
509 ErrorOr<const Elf_Shdr *> ESecOrErr = EF.getSection(ESym);
510 if (std::error_code EC = ESecOrErr.getError())
513 const Elf_Shdr *ESec = *ESecOrErr;
515 return section_end();
518 Sec.p = reinterpret_cast<intptr_t>(ESec);
519 return section_iterator(SectionRef(Sec, this));
522 template <class ELFT>
523 ErrorOr<section_iterator>
524 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb) const {
525 return getSymbolSection(getSymbol(Symb));
528 template <class ELFT>
529 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
530 const Elf_Shdr *ESec = toELFShdrIter(Sec);
534 template <class ELFT>
535 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
536 StringRef &Result) const {
537 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
539 return Name.getError();
541 return std::error_code();
544 template <class ELFT>
545 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
546 return toELFShdrIter(Sec)->sh_addr;
549 template <class ELFT>
550 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
551 return toELFShdrIter(Sec)->sh_size;
554 template <class ELFT>
556 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
557 StringRef &Result) const {
558 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
559 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
560 return std::error_code();
563 template <class ELFT>
564 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
565 return toELFShdrIter(Sec)->sh_addralign;
568 template <class ELFT>
569 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
570 return toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
573 template <class ELFT>
574 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
575 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
576 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
577 EShdr->sh_type == ELF::SHT_PROGBITS;
580 template <class ELFT>
581 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
582 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
583 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
584 EShdr->sh_type == ELF::SHT_NOBITS;
587 template <class ELFT>
588 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
589 return toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
592 template <class ELFT>
594 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
596 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
597 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
600 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
601 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
602 return relocation_iterator(RelocationRef(RelData, this));
604 const Elf_Shdr *RelSec = getRelSection(RelData);
605 ErrorOr<const Elf_Shdr *> SymSecOrErr = EF.getSection(RelSec->sh_link);
606 if (std::error_code EC = SymSecOrErr.getError())
607 report_fatal_error(EC.message());
608 const Elf_Shdr *SymSec = *SymSecOrErr;
609 uint32_t SymSecType = SymSec->sh_type;
610 if (SymSecType != ELF::SHT_SYMTAB && SymSecType != ELF::SHT_DYNSYM)
611 report_fatal_error("Invalid symbol table section type!");
612 if (SymSecType == ELF::SHT_DYNSYM)
615 return relocation_iterator(RelocationRef(RelData, this));
618 template <class ELFT>
620 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
621 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
622 relocation_iterator Begin = section_rel_begin(Sec);
623 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
625 DataRefImpl RelData = Begin->getRawDataRefImpl();
626 RelData.d.b += (S->sh_size / S->sh_entsize) << 1;
627 return relocation_iterator(RelocationRef(RelData, this));
630 template <class ELFT>
632 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
633 if (EF.getHeader()->e_type != ELF::ET_REL)
634 return section_end();
636 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
637 uintX_t Type = EShdr->sh_type;
638 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
639 return section_end();
641 ErrorOr<const Elf_Shdr *> R = EF.getSection(EShdr->sh_info);
642 if (std::error_code EC = R.getError())
643 report_fatal_error(EC.message());
644 return section_iterator(SectionRef(toDRI(*R), this));
648 template <class ELFT>
649 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
653 template <class ELFT>
655 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
657 const Elf_Shdr *sec = getRelSection(Rel);
658 if (sec->sh_type == ELF::SHT_REL)
659 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
661 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
665 bool IsDyn = Rel.d.b & 1;
666 DataRefImpl SymbolData;
668 SymbolData = toDRI(DotDynSymSec, symbolIdx);
670 SymbolData = toDRI(EF.getDotSymtabSec(), symbolIdx);
671 return symbol_iterator(SymbolRef(SymbolData, this));
674 template <class ELFT>
675 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
676 assert(EF.getHeader()->e_type == ELF::ET_REL &&
677 "Only relocatable object files have relocation offsets");
678 const Elf_Shdr *sec = getRelSection(Rel);
679 if (sec->sh_type == ELF::SHT_REL)
680 return getRel(Rel)->r_offset;
682 return getRela(Rel)->r_offset;
685 template <class ELFT>
686 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
687 const Elf_Shdr *sec = getRelSection(Rel);
688 if (sec->sh_type == ELF::SHT_REL)
689 return getRel(Rel)->getType(EF.isMips64EL());
691 return getRela(Rel)->getType(EF.isMips64EL());
694 template <class ELFT>
695 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
696 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
699 template <class ELFT>
700 void ELFObjectFile<ELFT>::getRelocationTypeName(
701 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
702 uint32_t type = getRelocationType(Rel);
703 EF.getRelocationTypeName(type, Result);
706 template <class ELFT>
708 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
709 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
710 return object_error::parse_failed;
711 return (int64_t)getRela(Rel)->r_addend;
714 template <class ELFT>
715 const typename ELFFile<ELFT>::Elf_Sym *
716 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
717 return &*toELFSymIter(Symb);
720 template <class ELFT>
721 const typename ELFObjectFile<ELFT>::Elf_Rel *
722 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
723 assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
724 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b >> 1);
727 template <class ELFT>
728 const typename ELFObjectFile<ELFT>::Elf_Rela *
729 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
730 assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
731 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b >> 1);
734 template <class ELFT>
735 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
737 getELFType(ELFT::TargetEndianness == support::little, ELFT::Is64Bits),
739 EF(Data.getBuffer(), EC) {
740 for (const Elf_Shdr &Sec : EF.sections()) {
741 switch (Sec.sh_type) {
742 case ELF::SHT_DYNSYM: {
744 // More than one .dynsym!
745 EC = object_error::parse_failed;
755 template <class ELFT>
756 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
757 DataRefImpl Sym = toDRI(EF.getDotSymtabSec(), 0);
758 return basic_symbol_iterator(SymbolRef(Sym, this));
761 template <class ELFT>
762 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
763 const Elf_Shdr *SymTab = EF.getDotSymtabSec();
765 return symbol_begin_impl();
766 DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
767 return basic_symbol_iterator(SymbolRef(Sym, this));
770 template <class ELFT>
771 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
772 DataRefImpl Sym = toDRI(DotDynSymSec, 0);
773 return symbol_iterator(SymbolRef(Sym, this));
776 template <class ELFT>
777 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
778 const Elf_Shdr *SymTab = DotDynSymSec;
779 DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
780 return basic_symbol_iterator(SymbolRef(Sym, this));
783 template <class ELFT>
784 section_iterator ELFObjectFile<ELFT>::section_begin() const {
785 return section_iterator(SectionRef(toDRI(EF.section_begin()), this));
788 template <class ELFT>
789 section_iterator ELFObjectFile<ELFT>::section_end() const {
790 return section_iterator(SectionRef(toDRI(EF.section_end()), this));
793 template <class ELFT>
794 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
795 return ELFT::Is64Bits ? 8 : 4;
798 template <class ELFT>
799 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
800 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
801 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
802 case ELF::ELFCLASS32:
803 switch (EF.getHeader()->e_machine) {
807 return "ELF32-x86-64";
809 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
810 case ELF::EM_HEXAGON:
811 return "ELF32-hexagon";
817 case ELF::EM_SPARC32PLUS:
818 return "ELF32-sparc";
820 return "ELF32-unknown";
822 case ELF::ELFCLASS64:
823 switch (EF.getHeader()->e_machine) {
827 return "ELF64-x86-64";
828 case ELF::EM_AARCH64:
829 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
831 return "ELF64-ppc64";
834 case ELF::EM_SPARCV9:
835 return "ELF64-sparc";
839 return "ELF64-unknown";
842 // FIXME: Proper error handling.
843 report_fatal_error("Invalid ELFCLASS!");
847 template <class ELFT>
848 unsigned ELFObjectFile<ELFT>::getArch() const {
849 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
850 switch (EF.getHeader()->e_machine) {
854 return Triple::x86_64;
855 case ELF::EM_AARCH64:
856 return Triple::aarch64;
859 case ELF::EM_HEXAGON:
860 return Triple::hexagon;
862 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
863 case ELF::ELFCLASS32:
864 return IsLittleEndian ? Triple::mipsel : Triple::mips;
865 case ELF::ELFCLASS64:
866 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
868 report_fatal_error("Invalid ELFCLASS!");
873 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
875 return Triple::systemz;
878 case ELF::EM_SPARC32PLUS:
879 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
880 case ELF::EM_SPARCV9:
881 return Triple::sparcv9;
884 return Triple::UnknownArch;
888 template <class ELFT>
889 ELFObjectFileBase::elf_symbol_iterator_range
890 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
891 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
894 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
895 return EF.getHeader()->e_type == ELF::ET_REL;