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 ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override;
199 std::error_code getSymbolAddress(DataRefImpl Symb,
200 uint64_t &Res) const override;
201 uint64_t getSymbolValue(DataRefImpl Symb) const override;
202 uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
203 uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
204 uint32_t getSymbolFlags(DataRefImpl Symb) const override;
205 uint8_t getSymbolOther(DataRefImpl Symb) const override;
206 uint8_t getSymbolELFType(DataRefImpl Symb) const override;
207 SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
208 section_iterator getSymbolSection(const Elf_Sym *Symb) const;
209 std::error_code getSymbolSection(DataRefImpl Symb,
210 section_iterator &Res) const override;
212 void moveSectionNext(DataRefImpl &Sec) const override;
213 std::error_code getSectionName(DataRefImpl Sec,
214 StringRef &Res) const override;
215 uint64_t getSectionAddress(DataRefImpl Sec) const override;
216 uint64_t getSectionSize(DataRefImpl Sec) const override;
217 std::error_code getSectionContents(DataRefImpl Sec,
218 StringRef &Res) const override;
219 uint64_t getSectionAlignment(DataRefImpl Sec) const override;
220 bool isSectionText(DataRefImpl Sec) const override;
221 bool isSectionData(DataRefImpl Sec) const override;
222 bool isSectionBSS(DataRefImpl Sec) const override;
223 bool isSectionVirtual(DataRefImpl Sec) const override;
224 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
225 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
226 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
228 void moveRelocationNext(DataRefImpl &Rel) const override;
229 ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override;
230 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
231 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
232 uint64_t getRelocationType(DataRefImpl Rel) const override;
233 void getRelocationTypeName(DataRefImpl Rel,
234 SmallVectorImpl<char> &Result) const override;
236 uint32_t getSectionType(DataRefImpl Sec) const override;
237 uint64_t getSectionFlags(DataRefImpl Sec) const override;
238 uint64_t getROffset(DataRefImpl Rel) const;
239 StringRef getRelocationTypeName(uint32_t Type) const;
241 /// \brief Get the relocation section that contains \a Rel.
242 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
243 return *EF.getSection(Rel.d.a);
246 const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
247 return reinterpret_cast<const Elf_Sym *>(Sym.p & ~uintptr_t(1));
250 DataRefImpl toDRI(const Elf_Sym *Sym, bool IsDynamic) const {
253 reinterpret_cast<uintptr_t>(Sym) | static_cast<uintptr_t>(IsDynamic);
257 const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
258 return reinterpret_cast<const Elf_Shdr *>(Sec.p);
261 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
263 DRI.p = reinterpret_cast<uintptr_t>(Sec);
267 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
268 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
269 reinterpret_cast<const char *>(Dyn.p));
272 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
274 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
278 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
279 unsigned char Binding = ESym->getBinding();
280 unsigned char Visibility = ESym->getVisibility();
282 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
283 // visibility is either DEFAULT or PROTECTED. All other symbols are not
285 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
286 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
292 // This flag is used for classof, to distinguish ELFObjectFile from
293 // its subclass. If more subclasses will be created, this flag will
294 // have to become an enum.
295 bool isDyldELFObject;
298 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
300 const Elf_Rel *getRel(DataRefImpl Rel) const;
301 const Elf_Rela *getRela(DataRefImpl Rela) const;
303 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
305 basic_symbol_iterator symbol_begin_impl() const override;
306 basic_symbol_iterator symbol_end_impl() const override;
308 elf_symbol_iterator dynamic_symbol_begin() const;
309 elf_symbol_iterator dynamic_symbol_end() const;
311 section_iterator section_begin() const override;
312 section_iterator section_end() const override;
314 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
316 uint8_t getBytesInAddress() const override;
317 StringRef getFileFormatName() const override;
318 unsigned getArch() const override;
319 StringRef getLoadName() const;
321 std::error_code getPlatformFlags(unsigned &Result) const override {
322 Result = EF.getHeader()->e_flags;
323 return std::error_code();
326 const ELFFile<ELFT> *getELFFile() const { return &EF; }
328 bool isDyldType() const { return isDyldELFObject; }
329 static inline bool classof(const Binary *v) {
330 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
334 elf_symbol_iterator_range getDynamicSymbolIterators() const override;
336 bool isRelocatableObject() const override;
339 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
340 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
341 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
342 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
344 template <class ELFT>
345 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
346 const Elf_Sym *S = toELFSymIter(Sym);
347 Sym = toDRI(++S, Sym.p & 1);
350 template <class ELFT>
351 ErrorOr<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const {
352 const Elf_Sym *ESym = toELFSymIter(Sym);
353 return EF.getSymbolName(ESym, Sym.p & 1);
356 template <class ELFT>
357 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
358 return toELFShdrIter(Sec)->sh_flags;
361 template <class ELFT>
362 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
363 return toELFShdrIter(Sec)->sh_type;
366 template <class ELFT>
367 uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
368 const Elf_Sym *ESym = getSymbol(Symb);
369 switch (ESym->st_shndx) {
370 case ELF::SHN_COMMON:
372 return UnknownAddress;
374 return ESym->st_value;
377 const Elf_Ehdr *Header = EF.getHeader();
378 uint64_t Ret = ESym->st_value;
380 // Clear the ARM/Thumb or microMIPS indicator flag.
381 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
382 ESym->getType() == ELF::STT_FUNC)
388 template <class ELFT>
389 std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
390 uint64_t &Result) const {
391 Result = getSymbolValue(Symb);
392 const Elf_Sym *ESym = getSymbol(Symb);
393 switch (ESym->st_shndx) {
394 case ELF::SHN_COMMON:
397 return std::error_code();
400 const Elf_Ehdr *Header = EF.getHeader();
402 if (Header->e_type == ELF::ET_REL) {
403 ErrorOr<const Elf_Shdr *> SectionOrErr = EF.getSection(ESym);
404 if (std::error_code EC = SectionOrErr.getError())
406 const Elf_Shdr *Section = *SectionOrErr;
408 Result += Section->sh_addr;
411 return std::error_code();
414 template <class ELFT>
415 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
416 const Elf_Sym *Sym = toELFSymIter(Symb);
417 if (Sym->st_shndx == ELF::SHN_COMMON)
418 return Sym->st_value;
422 template <class ELFT>
423 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
424 return toELFSymIter(Sym)->st_size;
427 template <class ELFT>
428 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
429 return toELFSymIter(Symb)->st_size;
432 template <class ELFT>
433 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
434 return toELFSymIter(Symb)->st_other;
437 template <class ELFT>
438 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
439 return toELFSymIter(Symb)->getType();
442 template <class ELFT>
443 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
444 const Elf_Sym *ESym = getSymbol(Symb);
446 switch (ESym->getType()) {
447 case ELF::STT_NOTYPE:
448 return SymbolRef::ST_Unknown;
449 case ELF::STT_SECTION:
450 return SymbolRef::ST_Debug;
452 return SymbolRef::ST_File;
454 return SymbolRef::ST_Function;
455 case ELF::STT_OBJECT:
456 case ELF::STT_COMMON:
458 return SymbolRef::ST_Data;
460 return SymbolRef::ST_Other;
464 template <class ELFT>
465 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
466 const Elf_Sym *ESym = toELFSymIter(Sym);
468 uint32_t Result = SymbolRef::SF_None;
470 if (ESym->getBinding() != ELF::STB_LOCAL)
471 Result |= SymbolRef::SF_Global;
473 if (ESym->getBinding() == ELF::STB_WEAK)
474 Result |= SymbolRef::SF_Weak;
476 if (ESym->st_shndx == ELF::SHN_ABS)
477 Result |= SymbolRef::SF_Absolute;
479 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
480 ESym == EF.symbol_begin() || ESym == EF.dynamic_symbol_begin())
481 Result |= SymbolRef::SF_FormatSpecific;
483 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
484 ErrorOr<StringRef> NameOrErr = EF.getSymbolName(ESym, Sym.p & 1);
486 StringRef Name = *NameOrErr;
487 if (Name.startswith("$d") || Name.startswith("$t") ||
488 Name.startswith("$a"))
489 Result |= SymbolRef::SF_FormatSpecific;
493 if (ESym->st_shndx == ELF::SHN_UNDEF)
494 Result |= SymbolRef::SF_Undefined;
496 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
497 Result |= SymbolRef::SF_Common;
499 if (isExportedToOtherDSO(ESym))
500 Result |= SymbolRef::SF_Exported;
502 if (ESym->getVisibility() == ELF::STV_HIDDEN)
503 Result |= SymbolRef::SF_Hidden;
508 template <class ELFT>
510 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
511 ErrorOr<const Elf_Shdr *> ESecOrErr = EF.getSection(ESym);
512 if (std::error_code EC = ESecOrErr.getError())
513 report_fatal_error(EC.message());
515 const Elf_Shdr *ESec = *ESecOrErr;
517 return section_end();
520 Sec.p = reinterpret_cast<intptr_t>(ESec);
521 return section_iterator(SectionRef(Sec, this));
524 template <class ELFT>
526 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
527 section_iterator &Res) const {
528 Res = getSymbolSection(getSymbol(Symb));
529 return std::error_code();
532 template <class ELFT>
533 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
534 const Elf_Shdr *ESec = toELFShdrIter(Sec);
538 template <class ELFT>
539 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
540 StringRef &Result) const {
541 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
543 return Name.getError();
545 return std::error_code();
548 template <class ELFT>
549 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
550 return toELFShdrIter(Sec)->sh_addr;
553 template <class ELFT>
554 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
555 return toELFShdrIter(Sec)->sh_size;
558 template <class ELFT>
560 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
561 StringRef &Result) const {
562 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
563 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
564 return std::error_code();
567 template <class ELFT>
568 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
569 return toELFShdrIter(Sec)->sh_addralign;
572 template <class ELFT>
573 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
574 return toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
577 template <class ELFT>
578 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
579 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
580 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
581 EShdr->sh_type == ELF::SHT_PROGBITS;
584 template <class ELFT>
585 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
586 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
587 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
588 EShdr->sh_type == ELF::SHT_NOBITS;
591 template <class ELFT>
592 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
593 return toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
596 template <class ELFT>
598 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
600 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
601 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
604 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
605 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
606 return relocation_iterator(RelocationRef(RelData, this));
608 const Elf_Shdr *RelSec = getRelSection(RelData);
609 ErrorOr<const Elf_Shdr *> SymSecOrErr = EF.getSection(RelSec->sh_link);
610 if (std::error_code EC = SymSecOrErr.getError())
611 report_fatal_error(EC.message());
612 const Elf_Shdr *SymSec = *SymSecOrErr;
613 uint32_t SymSecType = SymSec->sh_type;
614 if (SymSecType != ELF::SHT_SYMTAB && SymSecType != ELF::SHT_DYNSYM)
615 report_fatal_error("Invalid symbol table section type!");
616 if (SymSecType == ELF::SHT_DYNSYM)
619 return relocation_iterator(RelocationRef(RelData, this));
622 template <class ELFT>
624 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
625 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
626 relocation_iterator Begin = section_rel_begin(Sec);
627 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
629 DataRefImpl RelData = Begin->getRawDataRefImpl();
630 RelData.d.b += (S->sh_size / S->sh_entsize) << 1;
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 ErrorOr<const Elf_Shdr *> R = EF.getSection(EShdr->sh_info);
646 if (std::error_code EC = R.getError())
647 report_fatal_error(EC.message());
648 return section_iterator(SectionRef(toDRI(*R), this));
652 template <class ELFT>
653 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
657 template <class ELFT>
659 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
661 const Elf_Shdr *sec = getRelSection(Rel);
662 if (sec->sh_type == ELF::SHT_REL)
663 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
665 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
669 bool IsDyn = Rel.d.b & 1;
670 DataRefImpl SymbolData;
672 SymbolData = toDRI(EF.dynamic_symbol_begin() + symbolIdx, true);
674 SymbolData = toDRI(EF.symbol_begin() + symbolIdx, false);
675 return symbol_iterator(SymbolRef(SymbolData, this));
678 template <class ELFT>
680 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel) const {
681 uint64_t ROffset = getROffset(Rel);
682 const Elf_Ehdr *Header = EF.getHeader();
684 if (Header->e_type == ELF::ET_REL) {
685 const Elf_Shdr *RelocationSec = getRelSection(Rel);
686 ErrorOr<const Elf_Shdr *> RelocatedSec =
687 EF.getSection(RelocationSec->sh_info);
688 if (std::error_code EC = RelocatedSec.getError())
690 return ROffset + (*RelocatedSec)->sh_addr;
695 template <class ELFT>
696 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
697 assert(EF.getHeader()->e_type == ELF::ET_REL &&
698 "Only relocatable object files have relocation offsets");
699 return getROffset(Rel);
702 template <class ELFT>
703 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
704 const Elf_Shdr *sec = getRelSection(Rel);
705 if (sec->sh_type == ELF::SHT_REL)
706 return getRel(Rel)->r_offset;
708 return getRela(Rel)->r_offset;
711 template <class ELFT>
712 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
713 const Elf_Shdr *sec = getRelSection(Rel);
714 if (sec->sh_type == ELF::SHT_REL)
715 return getRel(Rel)->getType(EF.isMips64EL());
717 return getRela(Rel)->getType(EF.isMips64EL());
720 template <class ELFT>
721 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
722 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
725 template <class ELFT>
726 void ELFObjectFile<ELFT>::getRelocationTypeName(
727 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
728 uint32_t type = getRelocationType(Rel);
729 EF.getRelocationTypeName(type, Result);
732 template <class ELFT>
734 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
735 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
736 return object_error::parse_failed;
737 return (int64_t)getRela(Rel)->r_addend;
740 template <class ELFT>
741 const typename ELFFile<ELFT>::Elf_Sym *
742 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
743 return &*toELFSymIter(Symb);
746 template <class ELFT>
747 const typename ELFObjectFile<ELFT>::Elf_Rel *
748 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
749 assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
750 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b >> 1);
753 template <class ELFT>
754 const typename ELFObjectFile<ELFT>::Elf_Rela *
755 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
756 assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
757 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b >> 1);
760 template <class ELFT>
761 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
763 getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
767 EF(Data.getBuffer(), EC) {}
769 template <class ELFT>
770 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
771 DataRefImpl Sym = toDRI(EF.symbol_begin(), false);
772 return basic_symbol_iterator(SymbolRef(Sym, this));
775 template <class ELFT>
776 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
777 DataRefImpl Sym = toDRI(EF.symbol_end(), false);
778 return basic_symbol_iterator(SymbolRef(Sym, this));
781 template <class ELFT>
782 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
783 DataRefImpl Sym = toDRI(EF.dynamic_symbol_begin(), true);
784 return symbol_iterator(SymbolRef(Sym, this));
787 template <class ELFT>
788 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
789 DataRefImpl Sym = toDRI(EF.dynamic_symbol_end(), true);
790 return symbol_iterator(SymbolRef(Sym, this));
793 template <class ELFT>
794 section_iterator ELFObjectFile<ELFT>::section_begin() const {
795 return section_iterator(SectionRef(toDRI(EF.section_begin()), this));
798 template <class ELFT>
799 section_iterator ELFObjectFile<ELFT>::section_end() const {
800 return section_iterator(SectionRef(toDRI(EF.section_end()), this));
803 template <class ELFT>
804 StringRef ELFObjectFile<ELFT>::getLoadName() const {
805 Elf_Dyn_Iter DI = EF.dynamic_table_begin();
806 Elf_Dyn_Iter DE = EF.dynamic_table_end();
808 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
812 return EF.getDynamicString(DI->getVal());
816 template <class ELFT>
817 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
818 return ELFT::Is64Bits ? 8 : 4;
821 template <class ELFT>
822 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
823 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
824 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
825 case ELF::ELFCLASS32:
826 switch (EF.getHeader()->e_machine) {
830 return "ELF32-x86-64";
832 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
833 case ELF::EM_HEXAGON:
834 return "ELF32-hexagon";
840 case ELF::EM_SPARC32PLUS:
841 return "ELF32-sparc";
843 return "ELF32-unknown";
845 case ELF::ELFCLASS64:
846 switch (EF.getHeader()->e_machine) {
850 return "ELF64-x86-64";
851 case ELF::EM_AARCH64:
852 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
854 return "ELF64-ppc64";
857 case ELF::EM_SPARCV9:
858 return "ELF64-sparc";
862 return "ELF64-unknown";
865 // FIXME: Proper error handling.
866 report_fatal_error("Invalid ELFCLASS!");
870 template <class ELFT>
871 unsigned ELFObjectFile<ELFT>::getArch() const {
872 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
873 switch (EF.getHeader()->e_machine) {
877 return Triple::x86_64;
878 case ELF::EM_AARCH64:
879 return Triple::aarch64;
882 case ELF::EM_HEXAGON:
883 return Triple::hexagon;
885 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
886 case ELF::ELFCLASS32:
887 return IsLittleEndian ? Triple::mipsel : Triple::mips;
888 case ELF::ELFCLASS64:
889 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
891 report_fatal_error("Invalid ELFCLASS!");
896 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
898 return Triple::systemz;
901 case ELF::EM_SPARC32PLUS:
902 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
903 case ELF::EM_SPARCV9:
904 return Triple::sparcv9;
907 return Triple::UnknownArch;
911 template <class ELFT>
912 ELFObjectFileBase::elf_symbol_iterator_range
913 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
914 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
917 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
918 return EF.getHeader()->e_type == ELF::ET_REL;