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 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
226 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
227 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
229 void moveRelocationNext(DataRefImpl &Rel) const override;
230 ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override;
231 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
232 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
233 uint64_t getRelocationType(DataRefImpl Rel) const override;
234 void getRelocationTypeName(DataRefImpl Rel,
235 SmallVectorImpl<char> &Result) const override;
237 uint32_t getSectionType(DataRefImpl Sec) const override;
238 uint64_t getSectionFlags(DataRefImpl Sec) const override;
239 uint64_t getROffset(DataRefImpl Rel) const;
240 StringRef getRelocationTypeName(uint32_t Type) const;
242 /// \brief Get the relocation section that contains \a Rel.
243 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
244 ErrorOr<const Elf_Shdr *> Sec = EF.getSection(Rel.d.a);
245 if (std::error_code EC = Sec.getError())
246 report_fatal_error(EC.message());
250 const Elf_Rel *getRel(DataRefImpl Rel) const;
251 const Elf_Rela *getRela(DataRefImpl Rela) const;
253 const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
254 return reinterpret_cast<const Elf_Sym *>(Sym.p & ~uintptr_t(1));
257 DataRefImpl toDRI(const Elf_Sym *Sym, bool IsDynamic) const {
260 reinterpret_cast<uintptr_t>(Sym) | static_cast<uintptr_t>(IsDynamic);
264 const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
265 return reinterpret_cast<const Elf_Shdr *>(Sec.p);
268 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
270 DRI.p = reinterpret_cast<uintptr_t>(Sec);
274 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
275 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
276 reinterpret_cast<const char *>(Dyn.p));
279 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
281 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
285 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
286 unsigned char Binding = ESym->getBinding();
287 unsigned char Visibility = ESym->getVisibility();
289 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
290 // visibility is either DEFAULT or PROTECTED. All other symbols are not
292 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
293 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
299 // This flag is used for classof, to distinguish ELFObjectFile from
300 // its subclass. If more subclasses will be created, this flag will
301 // have to become an enum.
302 bool isDyldELFObject;
305 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
307 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
309 basic_symbol_iterator symbol_begin_impl() const override;
310 basic_symbol_iterator symbol_end_impl() const override;
312 elf_symbol_iterator dynamic_symbol_begin() const;
313 elf_symbol_iterator dynamic_symbol_end() const;
315 section_iterator section_begin() const override;
316 section_iterator section_end() const override;
318 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
320 uint8_t getBytesInAddress() const override;
321 StringRef getFileFormatName() const override;
322 unsigned getArch() const override;
323 StringRef getLoadName() const;
325 std::error_code getPlatformFlags(unsigned &Result) const override {
326 Result = EF.getHeader()->e_flags;
327 return std::error_code();
330 const ELFFile<ELFT> *getELFFile() const { return &EF; }
332 bool isDyldType() const { return isDyldELFObject; }
333 static inline bool classof(const Binary *v) {
334 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
338 elf_symbol_iterator_range getDynamicSymbolIterators() const override;
340 bool isRelocatableObject() const override;
343 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
344 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
345 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
346 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
348 template <class ELFT>
349 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
350 const Elf_Sym *S = toELFSymIter(Sym);
351 Sym = toDRI(++S, Sym.p & 1);
354 template <class ELFT>
355 std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym,
356 StringRef &Result) const {
357 const Elf_Sym *ESym = toELFSymIter(Sym);
358 ErrorOr<StringRef> Name = EF.getSymbolName(ESym, Sym.p & 1);
360 return Name.getError();
362 return std::error_code();
365 template <class ELFT>
366 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
367 return toELFShdrIter(Sec)->sh_flags;
370 template <class ELFT>
371 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
372 return toELFShdrIter(Sec)->sh_type;
375 template <class ELFT>
376 uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
377 const Elf_Sym *ESym = getSymbol(Symb);
378 switch (ESym->st_shndx) {
379 case ELF::SHN_COMMON:
381 return UnknownAddress;
383 return ESym->st_value;
386 const Elf_Ehdr *Header = EF.getHeader();
387 uint64_t Ret = ESym->st_value;
389 // Clear the ARM/Thumb or microMIPS indicator flag.
390 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
391 ESym->getType() == ELF::STT_FUNC)
397 template <class ELFT>
398 std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
399 uint64_t &Result) const {
400 Result = getSymbolValue(Symb);
401 const Elf_Sym *ESym = getSymbol(Symb);
402 switch (ESym->st_shndx) {
403 case ELF::SHN_COMMON:
406 return std::error_code();
409 const Elf_Ehdr *Header = EF.getHeader();
411 if (Header->e_type == ELF::ET_REL) {
412 ErrorOr<const Elf_Shdr *> SectionOrErr = EF.getSection(ESym);
413 if (std::error_code EC = SectionOrErr.getError())
415 const Elf_Shdr *Section = *SectionOrErr;
417 Result += Section->sh_addr;
420 return std::error_code();
423 template <class ELFT>
424 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
425 const Elf_Sym *Sym = toELFSymIter(Symb);
426 if (Sym->st_shndx == ELF::SHN_COMMON)
427 return Sym->st_value;
431 template <class ELFT>
432 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
433 return toELFSymIter(Sym)->st_size;
436 template <class ELFT>
437 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
438 return toELFSymIter(Symb)->st_size;
441 template <class ELFT>
442 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
443 return toELFSymIter(Symb)->st_other;
446 template <class ELFT>
447 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
448 return toELFSymIter(Symb)->getType();
451 template <class ELFT>
452 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
453 const Elf_Sym *ESym = getSymbol(Symb);
455 switch (ESym->getType()) {
456 case ELF::STT_NOTYPE:
457 return SymbolRef::ST_Unknown;
458 case ELF::STT_SECTION:
459 return SymbolRef::ST_Debug;
461 return SymbolRef::ST_File;
463 return SymbolRef::ST_Function;
464 case ELF::STT_OBJECT:
465 case ELF::STT_COMMON:
467 return SymbolRef::ST_Data;
469 return SymbolRef::ST_Other;
473 template <class ELFT>
474 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
475 const Elf_Sym *ESym = toELFSymIter(Sym);
477 uint32_t Result = SymbolRef::SF_None;
479 if (ESym->getBinding() != ELF::STB_LOCAL)
480 Result |= SymbolRef::SF_Global;
482 if (ESym->getBinding() == ELF::STB_WEAK)
483 Result |= SymbolRef::SF_Weak;
485 if (ESym->st_shndx == ELF::SHN_ABS)
486 Result |= SymbolRef::SF_Absolute;
488 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
489 ESym == EF.symbol_begin() || ESym == EF.dynamic_symbol_begin())
490 Result |= SymbolRef::SF_FormatSpecific;
492 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
493 ErrorOr<StringRef> NameOrErr = EF.getSymbolName(ESym, Sym.p & 1);
495 StringRef Name = *NameOrErr;
496 if (Name.startswith("$d") || Name.startswith("$t") ||
497 Name.startswith("$a"))
498 Result |= SymbolRef::SF_FormatSpecific;
502 if (ESym->st_shndx == ELF::SHN_UNDEF)
503 Result |= SymbolRef::SF_Undefined;
505 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
506 Result |= SymbolRef::SF_Common;
508 if (isExportedToOtherDSO(ESym))
509 Result |= SymbolRef::SF_Exported;
511 if (ESym->getVisibility() == ELF::STV_HIDDEN)
512 Result |= SymbolRef::SF_Hidden;
517 template <class ELFT>
519 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
520 ErrorOr<const Elf_Shdr *> ESecOrErr = EF.getSection(ESym);
521 if (std::error_code EC = ESecOrErr.getError())
522 report_fatal_error(EC.message());
524 const Elf_Shdr *ESec = *ESecOrErr;
526 return section_end();
529 Sec.p = reinterpret_cast<intptr_t>(ESec);
530 return section_iterator(SectionRef(Sec, this));
533 template <class ELFT>
535 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
536 section_iterator &Res) const {
537 Res = getSymbolSection(getSymbol(Symb));
538 return std::error_code();
541 template <class ELFT>
542 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
543 const Elf_Shdr *ESec = toELFShdrIter(Sec);
547 template <class ELFT>
548 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
549 StringRef &Result) const {
550 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
552 return Name.getError();
554 return std::error_code();
557 template <class ELFT>
558 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
559 return toELFShdrIter(Sec)->sh_addr;
562 template <class ELFT>
563 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
564 return toELFShdrIter(Sec)->sh_size;
567 template <class ELFT>
569 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
570 StringRef &Result) const {
571 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
572 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
573 return std::error_code();
576 template <class ELFT>
577 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
578 return toELFShdrIter(Sec)->sh_addralign;
581 template <class ELFT>
582 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
583 return toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
586 template <class ELFT>
587 bool ELFObjectFile<ELFT>::isSectionData(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_PROGBITS;
593 template <class ELFT>
594 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
595 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
596 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
597 EShdr->sh_type == ELF::SHT_NOBITS;
600 template <class ELFT>
601 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
602 return toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
605 template <class ELFT>
607 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
609 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
610 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
612 return relocation_iterator(RelocationRef(RelData, this));
615 template <class ELFT>
617 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
619 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
620 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
621 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
622 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
625 RelData.d.b = S->sh_size / S->sh_entsize;
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 ErrorOr<const Elf_Shdr *> SymSecOrErr = EF.getSection(sec->sh_link);
666 if (std::error_code EC = SymSecOrErr.getError())
667 report_fatal_error(EC.message());
668 const Elf_Shdr *SymSec = *SymSecOrErr;
670 DataRefImpl SymbolData;
671 switch (SymSec->sh_type) {
673 report_fatal_error("Invalid symbol table section type!");
674 case ELF::SHT_SYMTAB:
675 SymbolData = toDRI(EF.symbol_begin() + symbolIdx, false);
677 case ELF::SHT_DYNSYM:
678 SymbolData = toDRI(EF.dynamic_symbol_begin() + symbolIdx, true);
682 return symbol_iterator(SymbolRef(SymbolData, this));
685 template <class ELFT>
687 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel) 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 ErrorOr<const Elf_Shdr *> RelocatedSec =
694 EF.getSection(RelocationSec->sh_info);
695 if (std::error_code EC = RelocatedSec.getError())
697 return ROffset + (*RelocatedSec)->sh_addr;
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;