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 std::error_code getRelocationAddress(DataRefImpl Rel,
231 uint64_t &Res) const override;
232 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
233 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
234 uint64_t getRelocationType(DataRefImpl Rel) const override;
235 void getRelocationTypeName(DataRefImpl Rel,
236 SmallVectorImpl<char> &Result) const override;
238 uint32_t getSectionType(DataRefImpl Sec) const override;
239 uint64_t getSectionFlags(DataRefImpl Sec) const override;
240 uint64_t getROffset(DataRefImpl Rel) const;
241 StringRef getRelocationTypeName(uint32_t Type) const;
243 /// \brief Get the relocation section that contains \a Rel.
244 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
245 return EF.getSection(Rel.d.a);
248 const Elf_Rel *getRel(DataRefImpl Rel) const;
249 const Elf_Rela *getRela(DataRefImpl Rela) const;
251 const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
252 return reinterpret_cast<const Elf_Sym *>(Sym.p & ~uintptr_t(1));
255 DataRefImpl toDRI(const Elf_Sym *Sym, bool IsDynamic) const {
258 reinterpret_cast<uintptr_t>(Sym) | static_cast<uintptr_t>(IsDynamic);
262 const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
263 return reinterpret_cast<const Elf_Shdr *>(Sec.p);
266 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
268 DRI.p = reinterpret_cast<uintptr_t>(Sec);
272 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
273 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
274 reinterpret_cast<const char *>(Dyn.p));
277 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
279 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
283 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
284 unsigned char Binding = ESym->getBinding();
285 unsigned char Visibility = ESym->getVisibility();
287 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
288 // visibility is either DEFAULT or PROTECTED. All other symbols are not
290 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
291 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
297 // This flag is used for classof, to distinguish ELFObjectFile from
298 // its subclass. If more subclasses will be created, this flag will
299 // have to become an enum.
300 bool isDyldELFObject;
303 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
305 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
307 basic_symbol_iterator symbol_begin_impl() const override;
308 basic_symbol_iterator symbol_end_impl() const override;
310 elf_symbol_iterator dynamic_symbol_begin() const;
311 elf_symbol_iterator dynamic_symbol_end() const;
313 section_iterator section_begin() const override;
314 section_iterator section_end() const override;
316 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
318 uint8_t getBytesInAddress() const override;
319 StringRef getFileFormatName() const override;
320 unsigned getArch() const override;
321 StringRef getLoadName() const;
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 {
348 const Elf_Sym *S = toELFSymIter(Sym);
349 Sym = toDRI(++S, Sym.p & 1);
352 template <class ELFT>
353 std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym,
354 StringRef &Result) const {
355 const Elf_Sym *ESym = toELFSymIter(Sym);
356 ErrorOr<StringRef> Name = EF.getSymbolName(ESym, Sym.p & 1);
358 return Name.getError();
360 return std::error_code();
363 template <class ELFT>
364 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
365 return toELFShdrIter(Sec)->sh_flags;
368 template <class ELFT>
369 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
370 return toELFShdrIter(Sec)->sh_type;
373 template <class ELFT>
374 uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
375 const Elf_Sym *ESym = getSymbol(Symb);
376 switch (ESym->st_shndx) {
377 case ELF::SHN_COMMON:
379 return UnknownAddress;
381 return ESym->st_value;
384 const Elf_Ehdr *Header = EF.getHeader();
385 uint64_t Ret = ESym->st_value;
387 // Clear the ARM/Thumb or microMIPS indicator flag.
388 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
389 ESym->getType() == ELF::STT_FUNC)
395 template <class ELFT>
396 std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
397 uint64_t &Result) const {
398 Result = getSymbolValue(Symb);
399 const Elf_Sym *ESym = getSymbol(Symb);
400 switch (ESym->st_shndx) {
401 case ELF::SHN_COMMON:
404 return std::error_code();
407 const Elf_Ehdr *Header = EF.getHeader();
409 if (Header->e_type == ELF::ET_REL) {
410 const typename ELFFile<ELFT>::Elf_Shdr * Section = EF.getSection(ESym);
411 if (Section != nullptr)
412 Result += Section->sh_addr;
415 return std::error_code();
418 template <class ELFT>
419 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
420 const Elf_Sym *Sym = toELFSymIter(Symb);
421 if (Sym->st_shndx == ELF::SHN_COMMON)
422 return Sym->st_value;
426 template <class ELFT>
427 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
428 return toELFSymIter(Sym)->st_size;
431 template <class ELFT>
432 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
433 return toELFSymIter(Symb)->st_size;
436 template <class ELFT>
437 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
438 return toELFSymIter(Symb)->st_other;
441 template <class ELFT>
442 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
443 return toELFSymIter(Symb)->getType();
446 template <class ELFT>
447 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
448 const Elf_Sym *ESym = getSymbol(Symb);
450 switch (ESym->getType()) {
451 case ELF::STT_NOTYPE:
452 return SymbolRef::ST_Unknown;
453 case ELF::STT_SECTION:
454 return SymbolRef::ST_Debug;
456 return SymbolRef::ST_File;
458 return SymbolRef::ST_Function;
459 case ELF::STT_OBJECT:
460 case ELF::STT_COMMON:
462 return SymbolRef::ST_Data;
464 return SymbolRef::ST_Other;
468 template <class ELFT>
469 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
470 const Elf_Sym *ESym = toELFSymIter(Sym);
472 uint32_t Result = SymbolRef::SF_None;
474 if (ESym->getBinding() != ELF::STB_LOCAL)
475 Result |= SymbolRef::SF_Global;
477 if (ESym->getBinding() == ELF::STB_WEAK)
478 Result |= SymbolRef::SF_Weak;
480 if (ESym->st_shndx == ELF::SHN_ABS)
481 Result |= SymbolRef::SF_Absolute;
483 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
484 ESym == EF.symbol_begin() || ESym == EF.dynamic_symbol_begin())
485 Result |= SymbolRef::SF_FormatSpecific;
487 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
488 ErrorOr<StringRef> NameOrErr = EF.getSymbolName(ESym, Sym.p & 1);
490 StringRef Name = *NameOrErr;
491 if (Name.startswith("$d") || Name.startswith("$t") ||
492 Name.startswith("$a"))
493 Result |= SymbolRef::SF_FormatSpecific;
497 if (ESym->st_shndx == ELF::SHN_UNDEF)
498 Result |= SymbolRef::SF_Undefined;
500 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
501 Result |= SymbolRef::SF_Common;
503 if (isExportedToOtherDSO(ESym))
504 Result |= SymbolRef::SF_Exported;
506 if (ESym->getVisibility() == ELF::STV_HIDDEN)
507 Result |= SymbolRef::SF_Hidden;
512 template <class ELFT>
514 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
515 const Elf_Shdr *ESec = EF.getSection(ESym);
517 return section_end();
520 Sec.p = reinterpret_cast<intptr_t>(ESec);
521 return section_iterator(SectionRef(Sec, this));
525 template <class ELFT>
527 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
528 section_iterator &Res) const {
529 Res = getSymbolSection(getSymbol(Symb));
530 return std::error_code();
533 template <class ELFT>
534 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
535 const Elf_Shdr *ESec = toELFShdrIter(Sec);
539 template <class ELFT>
540 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
541 StringRef &Result) const {
542 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
544 return Name.getError();
546 return std::error_code();
549 template <class ELFT>
550 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
551 return toELFShdrIter(Sec)->sh_addr;
554 template <class ELFT>
555 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
556 return toELFShdrIter(Sec)->sh_size;
559 template <class ELFT>
561 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
562 StringRef &Result) const {
563 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
564 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
565 return std::error_code();
568 template <class ELFT>
569 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
570 return toELFShdrIter(Sec)->sh_addralign;
573 template <class ELFT>
574 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
575 return toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
578 template <class ELFT>
579 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
580 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
581 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
582 EShdr->sh_type == ELF::SHT_PROGBITS;
585 template <class ELFT>
586 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
587 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
588 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
589 EShdr->sh_type == ELF::SHT_NOBITS;
592 template <class ELFT>
593 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
594 return toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
597 template <class ELFT>
599 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
601 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
602 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
604 return relocation_iterator(RelocationRef(RelData, this));
607 template <class ELFT>
609 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
611 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
612 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
613 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
614 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
617 RelData.d.b = S->sh_size / S->sh_entsize;
619 return relocation_iterator(RelocationRef(RelData, this));
622 template <class ELFT>
624 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
625 if (EF.getHeader()->e_type != ELF::ET_REL)
626 return section_end();
628 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
629 uintX_t Type = EShdr->sh_type;
630 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
631 return section_end();
633 const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
634 return section_iterator(SectionRef(toDRI(R), this));
638 template <class ELFT>
639 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
643 template <class ELFT>
645 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
647 const Elf_Shdr *sec = getRelSection(Rel);
648 if (sec->sh_type == ELF::SHT_REL)
649 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
651 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
655 const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
657 DataRefImpl SymbolData;
658 switch (SymSec->sh_type) {
660 report_fatal_error("Invalid symbol table section type!");
661 case ELF::SHT_SYMTAB:
662 SymbolData = toDRI(EF.symbol_begin() + symbolIdx, false);
664 case ELF::SHT_DYNSYM:
665 SymbolData = toDRI(EF.dynamic_symbol_begin() + symbolIdx, true);
669 return symbol_iterator(SymbolRef(SymbolData, this));
672 template <class ELFT>
674 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
675 uint64_t &Result) const {
676 uint64_t ROffset = getROffset(Rel);
677 const Elf_Ehdr *Header = EF.getHeader();
679 if (Header->e_type == ELF::ET_REL) {
680 const Elf_Shdr *RelocationSec = getRelSection(Rel);
681 const Elf_Shdr *RelocatedSec = EF.getSection(RelocationSec->sh_info);
682 Result = ROffset + RelocatedSec->sh_addr;
687 return std::error_code();
690 template <class ELFT>
691 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
692 assert(EF.getHeader()->e_type == ELF::ET_REL &&
693 "Only relocatable object files have relocation offsets");
694 return getROffset(Rel);
697 template <class ELFT>
698 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
699 const Elf_Shdr *sec = getRelSection(Rel);
700 if (sec->sh_type == ELF::SHT_REL)
701 return getRel(Rel)->r_offset;
703 return getRela(Rel)->r_offset;
706 template <class ELFT>
707 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
708 const Elf_Shdr *sec = getRelSection(Rel);
709 if (sec->sh_type == ELF::SHT_REL)
710 return getRel(Rel)->getType(EF.isMips64EL());
712 return getRela(Rel)->getType(EF.isMips64EL());
715 template <class ELFT>
716 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
717 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
720 template <class ELFT>
721 void ELFObjectFile<ELFT>::getRelocationTypeName(
722 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
723 uint32_t type = getRelocationType(Rel);
724 EF.getRelocationTypeName(type, Result);
727 template <class ELFT>
729 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
730 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
731 return object_error::parse_failed;
732 return (int64_t)getRela(Rel)->r_addend;
735 template <class ELFT>
736 const typename ELFFile<ELFT>::Elf_Sym *
737 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
738 return &*toELFSymIter(Symb);
741 template <class ELFT>
742 const typename ELFObjectFile<ELFT>::Elf_Rel *
743 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
744 assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
745 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
748 template <class ELFT>
749 const typename ELFObjectFile<ELFT>::Elf_Rela *
750 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
751 assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
752 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
755 template <class ELFT>
756 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
758 getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
762 EF(Data.getBuffer(), EC) {}
764 template <class ELFT>
765 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
766 DataRefImpl Sym = toDRI(EF.symbol_begin(), false);
767 return basic_symbol_iterator(SymbolRef(Sym, this));
770 template <class ELFT>
771 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
772 DataRefImpl Sym = toDRI(EF.symbol_end(), false);
773 return basic_symbol_iterator(SymbolRef(Sym, this));
776 template <class ELFT>
777 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
778 DataRefImpl Sym = toDRI(EF.dynamic_symbol_begin(), true);
779 return symbol_iterator(SymbolRef(Sym, this));
782 template <class ELFT>
783 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
784 DataRefImpl Sym = toDRI(EF.dynamic_symbol_end(), true);
785 return symbol_iterator(SymbolRef(Sym, this));
788 template <class ELFT>
789 section_iterator ELFObjectFile<ELFT>::section_begin() const {
790 return section_iterator(SectionRef(toDRI(EF.section_begin()), this));
793 template <class ELFT>
794 section_iterator ELFObjectFile<ELFT>::section_end() const {
795 return section_iterator(SectionRef(toDRI(EF.section_end()), this));
798 template <class ELFT>
799 StringRef ELFObjectFile<ELFT>::getLoadName() const {
800 Elf_Dyn_Iter DI = EF.dynamic_table_begin();
801 Elf_Dyn_Iter DE = EF.dynamic_table_end();
803 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
807 return EF.getDynamicString(DI->getVal());
811 template <class ELFT>
812 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
813 return ELFT::Is64Bits ? 8 : 4;
816 template <class ELFT>
817 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
818 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
819 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
820 case ELF::ELFCLASS32:
821 switch (EF.getHeader()->e_machine) {
825 return "ELF32-x86-64";
827 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
828 case ELF::EM_HEXAGON:
829 return "ELF32-hexagon";
835 case ELF::EM_SPARC32PLUS:
836 return "ELF32-sparc";
838 return "ELF32-unknown";
840 case ELF::ELFCLASS64:
841 switch (EF.getHeader()->e_machine) {
845 return "ELF64-x86-64";
846 case ELF::EM_AARCH64:
847 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
849 return "ELF64-ppc64";
852 case ELF::EM_SPARCV9:
853 return "ELF64-sparc";
857 return "ELF64-unknown";
860 // FIXME: Proper error handling.
861 report_fatal_error("Invalid ELFCLASS!");
865 template <class ELFT>
866 unsigned ELFObjectFile<ELFT>::getArch() const {
867 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
868 switch (EF.getHeader()->e_machine) {
872 return Triple::x86_64;
873 case ELF::EM_AARCH64:
874 return Triple::aarch64;
877 case ELF::EM_HEXAGON:
878 return Triple::hexagon;
880 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
881 case ELF::ELFCLASS32:
882 return IsLittleEndian ? Triple::mipsel : Triple::mips;
883 case ELF::ELFCLASS64:
884 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
886 report_fatal_error("Invalid ELFCLASS!");
891 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
893 return Triple::systemz;
896 case ELF::EM_SPARC32PLUS:
897 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
898 case ELF::EM_SPARCV9:
899 return Triple::sparcv9;
902 return Triple::UnknownArch;
906 template <class ELFT>
907 ELFObjectFileBase::elf_symbol_iterator_range
908 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
909 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
912 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
913 return EF.getHeader()->e_type == ELF::ET_REL;