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;
192 typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
197 void moveSymbolNext(DataRefImpl &Symb) const override;
198 std::error_code getSymbolName(DataRefImpl Symb,
199 StringRef &Res) const override;
200 std::error_code getSymbolAddress(DataRefImpl Symb,
201 uint64_t &Res) const override;
202 uint64_t getSymbolValue(DataRefImpl Symb) const override;
203 uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
204 uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
205 uint32_t getSymbolFlags(DataRefImpl Symb) const override;
206 uint8_t getSymbolOther(DataRefImpl Symb) const override;
207 uint8_t getSymbolELFType(DataRefImpl Symb) const override;
208 SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
209 section_iterator getSymbolSection(const Elf_Sym *Symb) const;
210 std::error_code getSymbolSection(DataRefImpl Symb,
211 section_iterator &Res) const override;
213 void moveSectionNext(DataRefImpl &Sec) const override;
214 std::error_code getSectionName(DataRefImpl Sec,
215 StringRef &Res) const override;
216 uint64_t getSectionAddress(DataRefImpl Sec) const override;
217 uint64_t getSectionSize(DataRefImpl Sec) const override;
218 std::error_code getSectionContents(DataRefImpl Sec,
219 StringRef &Res) const override;
220 uint64_t getSectionAlignment(DataRefImpl Sec) const override;
221 bool isSectionText(DataRefImpl Sec) const override;
222 bool isSectionData(DataRefImpl Sec) const override;
223 bool isSectionBSS(DataRefImpl Sec) const override;
224 bool isSectionVirtual(DataRefImpl Sec) const override;
225 bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
226 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
227 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
228 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
230 void moveRelocationNext(DataRefImpl &Rel) const override;
231 std::error_code getRelocationAddress(DataRefImpl Rel,
232 uint64_t &Res) const override;
233 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
234 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
235 uint64_t getRelocationType(DataRefImpl Rel) const override;
236 void getRelocationTypeName(DataRefImpl Rel,
237 SmallVectorImpl<char> &Result) const override;
239 uint32_t getSectionType(DataRefImpl Sec) const override;
240 uint64_t getSectionFlags(DataRefImpl Sec) const override;
241 uint64_t getROffset(DataRefImpl Rel) const;
242 StringRef getRelocationTypeName(uint32_t Type) const;
244 /// \brief Get the relocation section that contains \a Rel.
245 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
246 return EF.getSection(Rel.d.a);
249 const Elf_Rel *getRel(DataRefImpl Rel) const;
250 const Elf_Rela *getRela(DataRefImpl Rela) const;
252 const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
253 return reinterpret_cast<const Elf_Sym *>(Sym.p & ~uintptr_t(1));
256 DataRefImpl toDRI(const Elf_Sym *Sym, bool IsDynamic) const {
259 reinterpret_cast<uintptr_t>(Sym) | static_cast<uintptr_t>(IsDynamic);
263 const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
264 return reinterpret_cast<const Elf_Shdr *>(Sec.p);
267 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
269 DRI.p = reinterpret_cast<uintptr_t>(Sec);
273 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
274 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
275 reinterpret_cast<const char *>(Dyn.p));
278 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
280 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
284 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
285 unsigned char Binding = ESym->getBinding();
286 unsigned char Visibility = ESym->getVisibility();
288 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
289 // visibility is either DEFAULT or PROTECTED. All other symbols are not
291 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
292 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
298 // This flag is used for classof, to distinguish ELFObjectFile from
299 // its subclass. If more subclasses will be created, this flag will
300 // have to become an enum.
301 bool isDyldELFObject;
304 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
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;
322 StringRef getLoadName() const;
324 std::error_code getPlatformFlags(unsigned &Result) const override {
325 Result = EF.getHeader()->e_flags;
326 return std::error_code();
329 const ELFFile<ELFT> *getELFFile() const { return &EF; }
331 bool isDyldType() const { return isDyldELFObject; }
332 static inline bool classof(const Binary *v) {
333 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
337 elf_symbol_iterator_range getDynamicSymbolIterators() const override;
339 bool isRelocatableObject() const override;
342 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
343 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
344 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
345 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
347 template <class ELFT>
348 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
349 const Elf_Sym *S = toELFSymIter(Sym);
350 Sym = toDRI(++S, Sym.p & 1);
353 template <class ELFT>
354 std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym,
355 StringRef &Result) const {
356 const Elf_Sym *ESym = toELFSymIter(Sym);
357 ErrorOr<StringRef> Name = EF.getSymbolName(ESym, Sym.p & 1);
359 return Name.getError();
361 return std::error_code();
364 template <class ELFT>
365 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
366 return toELFShdrIter(Sec)->sh_flags;
369 template <class ELFT>
370 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
371 return toELFShdrIter(Sec)->sh_type;
374 template <class ELFT>
375 uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
376 const Elf_Sym *ESym = getSymbol(Symb);
377 switch (ESym->st_shndx) {
378 case ELF::SHN_COMMON:
380 return UnknownAddress;
382 return ESym->st_value;
385 const Elf_Ehdr *Header = EF.getHeader();
386 uint64_t Ret = ESym->st_value;
388 // Clear the ARM/Thumb or microMIPS indicator flag.
389 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
390 ESym->getType() == ELF::STT_FUNC)
396 template <class ELFT>
397 std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
398 uint64_t &Result) const {
399 Result = getSymbolValue(Symb);
400 const Elf_Sym *ESym = getSymbol(Symb);
401 switch (ESym->st_shndx) {
402 case ELF::SHN_COMMON:
405 return std::error_code();
408 const Elf_Ehdr *Header = EF.getHeader();
410 if (Header->e_type == ELF::ET_REL) {
411 const typename ELFFile<ELFT>::Elf_Shdr * Section = EF.getSection(ESym);
412 if (Section != nullptr)
413 Result += Section->sh_addr;
416 return std::error_code();
419 template <class ELFT>
420 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
421 const Elf_Sym *Sym = toELFSymIter(Symb);
422 if (Sym->st_shndx == ELF::SHN_COMMON)
423 return Sym->st_value;
427 template <class ELFT>
428 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
429 return toELFSymIter(Sym)->st_size;
432 template <class ELFT>
433 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
434 return toELFSymIter(Symb)->st_size;
437 template <class ELFT>
438 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
439 return toELFSymIter(Symb)->st_other;
442 template <class ELFT>
443 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
444 return toELFSymIter(Symb)->getType();
447 template <class ELFT>
448 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
449 const Elf_Sym *ESym = getSymbol(Symb);
451 switch (ESym->getType()) {
452 case ELF::STT_NOTYPE:
453 return SymbolRef::ST_Unknown;
454 case ELF::STT_SECTION:
455 return SymbolRef::ST_Debug;
457 return SymbolRef::ST_File;
459 return SymbolRef::ST_Function;
460 case ELF::STT_OBJECT:
461 case ELF::STT_COMMON:
463 return SymbolRef::ST_Data;
465 return SymbolRef::ST_Other;
469 template <class ELFT>
470 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
471 const Elf_Sym *ESym = toELFSymIter(Sym);
473 uint32_t Result = SymbolRef::SF_None;
475 if (ESym->getBinding() != ELF::STB_LOCAL)
476 Result |= SymbolRef::SF_Global;
478 if (ESym->getBinding() == ELF::STB_WEAK)
479 Result |= SymbolRef::SF_Weak;
481 if (ESym->st_shndx == ELF::SHN_ABS)
482 Result |= SymbolRef::SF_Absolute;
484 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
485 ESym == EF.symbol_begin() || ESym == EF.dynamic_symbol_begin())
486 Result |= SymbolRef::SF_FormatSpecific;
488 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
489 ErrorOr<StringRef> NameOrErr = EF.getSymbolName(ESym, Sym.p & 1);
491 StringRef Name = *NameOrErr;
492 if (Name.startswith("$d") || Name.startswith("$t") ||
493 Name.startswith("$a"))
494 Result |= SymbolRef::SF_FormatSpecific;
498 if (ESym->st_shndx == ELF::SHN_UNDEF)
499 Result |= SymbolRef::SF_Undefined;
501 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
502 Result |= SymbolRef::SF_Common;
504 if (isExportedToOtherDSO(ESym))
505 Result |= SymbolRef::SF_Exported;
507 if (ESym->getVisibility() == ELF::STV_HIDDEN)
508 Result |= SymbolRef::SF_Hidden;
513 template <class ELFT>
515 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
516 const Elf_Shdr *ESec = EF.getSection(ESym);
518 return section_end();
521 Sec.p = reinterpret_cast<intptr_t>(ESec);
522 return section_iterator(SectionRef(Sec, this));
526 template <class ELFT>
528 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
529 section_iterator &Res) const {
530 Res = getSymbolSection(getSymbol(Symb));
531 return std::error_code();
534 template <class ELFT>
535 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
536 const Elf_Shdr *ESec = toELFShdrIter(Sec);
540 template <class ELFT>
541 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
542 StringRef &Result) const {
543 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
545 return Name.getError();
547 return std::error_code();
550 template <class ELFT>
551 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
552 return toELFShdrIter(Sec)->sh_addr;
555 template <class ELFT>
556 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
557 return toELFShdrIter(Sec)->sh_size;
560 template <class ELFT>
562 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
563 StringRef &Result) const {
564 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
565 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
566 return std::error_code();
569 template <class ELFT>
570 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
571 return toELFShdrIter(Sec)->sh_addralign;
574 template <class ELFT>
575 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
576 return toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
579 template <class ELFT>
580 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
581 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
582 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
583 EShdr->sh_type == ELF::SHT_PROGBITS;
586 template <class ELFT>
587 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
588 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
589 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
590 EShdr->sh_type == ELF::SHT_NOBITS;
593 template <class ELFT>
594 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
595 return toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
598 template <class ELFT>
599 bool ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
600 DataRefImpl Symb) const {
601 const Elf_Sym *ESym = toELFSymIter(Symb);
603 uintX_t Index = ESym->st_shndx;
604 bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
606 return !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
609 template <class ELFT>
611 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
613 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
614 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
616 return relocation_iterator(RelocationRef(RelData, this));
619 template <class ELFT>
621 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
623 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
624 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
625 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
626 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
629 RelData.d.b = S->sh_size / S->sh_entsize;
631 return relocation_iterator(RelocationRef(RelData, this));
634 template <class ELFT>
636 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
637 if (EF.getHeader()->e_type != ELF::ET_REL)
638 return section_end();
640 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
641 uintX_t Type = EShdr->sh_type;
642 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
643 return section_end();
645 const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
646 return section_iterator(SectionRef(toDRI(R), this));
650 template <class ELFT>
651 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
655 template <class ELFT>
657 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
659 const Elf_Shdr *sec = getRelSection(Rel);
660 if (sec->sh_type == ELF::SHT_REL)
661 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
663 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
667 const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
669 DataRefImpl SymbolData;
670 switch (SymSec->sh_type) {
672 report_fatal_error("Invalid symbol table section type!");
673 case ELF::SHT_SYMTAB:
674 SymbolData = toDRI(EF.symbol_begin() + symbolIdx, false);
676 case ELF::SHT_DYNSYM:
677 SymbolData = toDRI(EF.dynamic_symbol_begin() + symbolIdx, true);
681 return symbol_iterator(SymbolRef(SymbolData, this));
684 template <class ELFT>
686 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
687 uint64_t &Result) const {
688 uint64_t ROffset = getROffset(Rel);
689 const Elf_Ehdr *Header = EF.getHeader();
691 if (Header->e_type == ELF::ET_REL) {
692 const Elf_Shdr *RelocationSec = getRelSection(Rel);
693 const Elf_Shdr *RelocatedSec = EF.getSection(RelocationSec->sh_info);
694 Result = ROffset + RelocatedSec->sh_addr;
699 return std::error_code();
702 template <class ELFT>
703 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
704 assert(EF.getHeader()->e_type == ELF::ET_REL &&
705 "Only relocatable object files have relocation offsets");
706 return getROffset(Rel);
709 template <class ELFT>
710 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
711 const Elf_Shdr *sec = getRelSection(Rel);
712 if (sec->sh_type == ELF::SHT_REL)
713 return getRel(Rel)->r_offset;
715 return getRela(Rel)->r_offset;
718 template <class ELFT>
719 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
720 const Elf_Shdr *sec = getRelSection(Rel);
721 if (sec->sh_type == ELF::SHT_REL)
722 return getRel(Rel)->getType(EF.isMips64EL());
724 return getRela(Rel)->getType(EF.isMips64EL());
727 template <class ELFT>
728 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
729 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
732 template <class ELFT>
733 void ELFObjectFile<ELFT>::getRelocationTypeName(
734 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
735 uint32_t type = getRelocationType(Rel);
736 EF.getRelocationTypeName(type, Result);
739 template <class ELFT>
741 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
742 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
743 return object_error::parse_failed;
744 return (int64_t)getRela(Rel)->r_addend;
747 template <class ELFT>
748 const typename ELFFile<ELFT>::Elf_Sym *
749 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
750 return &*toELFSymIter(Symb);
753 template <class ELFT>
754 const typename ELFObjectFile<ELFT>::Elf_Rel *
755 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
756 assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
757 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
760 template <class ELFT>
761 const typename ELFObjectFile<ELFT>::Elf_Rela *
762 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
763 assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
764 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
767 template <class ELFT>
768 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
770 getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
774 EF(Data.getBuffer(), EC) {}
776 template <class ELFT>
777 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
778 DataRefImpl Sym = toDRI(EF.symbol_begin(), false);
779 return basic_symbol_iterator(SymbolRef(Sym, this));
782 template <class ELFT>
783 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
784 DataRefImpl Sym = toDRI(EF.symbol_end(), false);
785 return basic_symbol_iterator(SymbolRef(Sym, this));
788 template <class ELFT>
789 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
790 DataRefImpl Sym = toDRI(EF.dynamic_symbol_begin(), true);
791 return symbol_iterator(SymbolRef(Sym, this));
794 template <class ELFT>
795 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
796 DataRefImpl Sym = toDRI(EF.dynamic_symbol_end(), true);
797 return symbol_iterator(SymbolRef(Sym, this));
800 template <class ELFT>
801 section_iterator ELFObjectFile<ELFT>::section_begin() const {
802 return section_iterator(SectionRef(toDRI(EF.section_begin()), this));
805 template <class ELFT>
806 section_iterator ELFObjectFile<ELFT>::section_end() const {
807 return section_iterator(SectionRef(toDRI(EF.section_end()), this));
810 template <class ELFT>
811 StringRef ELFObjectFile<ELFT>::getLoadName() const {
812 Elf_Dyn_Iter DI = EF.dynamic_table_begin();
813 Elf_Dyn_Iter DE = EF.dynamic_table_end();
815 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
819 return EF.getDynamicString(DI->getVal());
823 template <class ELFT>
824 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
825 return ELFT::Is64Bits ? 8 : 4;
828 template <class ELFT>
829 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
830 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
831 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
832 case ELF::ELFCLASS32:
833 switch (EF.getHeader()->e_machine) {
837 return "ELF32-x86-64";
839 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
840 case ELF::EM_HEXAGON:
841 return "ELF32-hexagon";
847 case ELF::EM_SPARC32PLUS:
848 return "ELF32-sparc";
850 return "ELF32-unknown";
852 case ELF::ELFCLASS64:
853 switch (EF.getHeader()->e_machine) {
857 return "ELF64-x86-64";
858 case ELF::EM_AARCH64:
859 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
861 return "ELF64-ppc64";
864 case ELF::EM_SPARCV9:
865 return "ELF64-sparc";
869 return "ELF64-unknown";
872 // FIXME: Proper error handling.
873 report_fatal_error("Invalid ELFCLASS!");
877 template <class ELFT>
878 unsigned ELFObjectFile<ELFT>::getArch() const {
879 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
880 switch (EF.getHeader()->e_machine) {
884 return Triple::x86_64;
885 case ELF::EM_AARCH64:
886 return Triple::aarch64;
889 case ELF::EM_HEXAGON:
890 return Triple::hexagon;
892 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
893 case ELF::ELFCLASS32:
894 return IsLittleEndian ? Triple::mipsel : Triple::mips;
895 case ELF::ELFCLASS64:
896 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
898 report_fatal_error("Invalid ELFCLASS!");
903 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
905 return Triple::systemz;
908 case ELF::EM_SPARC32PLUS:
909 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
910 case ELF::EM_SPARCV9:
911 return Triple::sparcv9;
914 return Triple::UnknownArch;
918 template <class ELFT>
919 ELFObjectFileBase::elf_symbol_iterator_range
920 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
921 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
924 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
925 return EF.getHeader()->e_type == ELF::ET_REL;