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_Shdr_Iter Elf_Shdr_Iter;
193 typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
198 void moveSymbolNext(DataRefImpl &Symb) const override;
199 std::error_code getSymbolName(DataRefImpl Symb,
200 StringRef &Res) const override;
201 std::error_code getSymbolAddress(DataRefImpl Symb,
202 uint64_t &Res) const override;
203 uint64_t getSymbolValue(DataRefImpl Symb) const override;
204 uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
205 uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
206 uint32_t getSymbolFlags(DataRefImpl Symb) const override;
207 uint8_t getSymbolOther(DataRefImpl Symb) const override;
208 uint8_t getSymbolELFType(DataRefImpl Symb) const override;
209 SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
210 section_iterator getSymbolSection(const Elf_Sym *Symb) const;
211 std::error_code getSymbolSection(DataRefImpl Symb,
212 section_iterator &Res) const override;
214 void moveSectionNext(DataRefImpl &Sec) const override;
215 std::error_code getSectionName(DataRefImpl Sec,
216 StringRef &Res) const override;
217 uint64_t getSectionAddress(DataRefImpl Sec) const override;
218 uint64_t getSectionSize(DataRefImpl Sec) const override;
219 std::error_code getSectionContents(DataRefImpl Sec,
220 StringRef &Res) const override;
221 uint64_t getSectionAlignment(DataRefImpl Sec) const override;
222 bool isSectionText(DataRefImpl Sec) const override;
223 bool isSectionData(DataRefImpl Sec) const override;
224 bool isSectionBSS(DataRefImpl Sec) const override;
225 bool isSectionVirtual(DataRefImpl Sec) const override;
226 bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
227 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
228 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
229 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
231 void moveRelocationNext(DataRefImpl &Rel) const override;
232 std::error_code getRelocationAddress(DataRefImpl Rel,
233 uint64_t &Res) const override;
234 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
235 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
236 uint64_t getRelocationType(DataRefImpl Rel) const override;
237 void getRelocationTypeName(DataRefImpl Rel,
238 SmallVectorImpl<char> &Result) const override;
240 uint32_t getSectionType(DataRefImpl Sec) const override;
241 uint64_t getSectionFlags(DataRefImpl Sec) const override;
242 uint64_t getROffset(DataRefImpl Rel) const;
243 StringRef getRelocationTypeName(uint32_t Type) const;
245 /// \brief Get the relocation section that contains \a Rel.
246 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
247 return EF.getSection(Rel.d.a);
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 Elf_Shdr_Iter toELFShdrIter(DataRefImpl Sec) const {
265 return Elf_Shdr_Iter(EF.getHeader()->e_shentsize,
266 reinterpret_cast<const char *>(Sec.p));
269 DataRefImpl toDRI(Elf_Shdr_Iter Sec) const {
271 DRI.p = reinterpret_cast<uintptr_t>(Sec.get());
275 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
277 DRI.p = reinterpret_cast<uintptr_t>(Sec);
281 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
282 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
283 reinterpret_cast<const char *>(Dyn.p));
286 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
288 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
292 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
293 unsigned char Binding = ESym->getBinding();
294 unsigned char Visibility = ESym->getVisibility();
296 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
297 // visibility is either DEFAULT or PROTECTED. All other symbols are not
299 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
300 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
306 // This flag is used for classof, to distinguish ELFObjectFile from
307 // its subclass. If more subclasses will be created, this flag will
308 // have to become an enum.
309 bool isDyldELFObject;
312 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
314 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
316 basic_symbol_iterator symbol_begin_impl() const override;
317 basic_symbol_iterator symbol_end_impl() const override;
319 elf_symbol_iterator dynamic_symbol_begin() const;
320 elf_symbol_iterator dynamic_symbol_end() const;
322 section_iterator section_begin() const override;
323 section_iterator section_end() const override;
325 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
327 uint8_t getBytesInAddress() const override;
328 StringRef getFileFormatName() const override;
329 unsigned getArch() const override;
330 StringRef getLoadName() const;
332 std::error_code getPlatformFlags(unsigned &Result) const override {
333 Result = EF.getHeader()->e_flags;
334 return std::error_code();
337 const ELFFile<ELFT> *getELFFile() const { return &EF; }
339 bool isDyldType() const { return isDyldELFObject; }
340 static inline bool classof(const Binary *v) {
341 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
345 elf_symbol_iterator_range getDynamicSymbolIterators() const override;
347 bool isRelocatableObject() const override;
350 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
351 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
352 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
353 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
355 template <class ELFT>
356 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
357 const Elf_Sym *S = toELFSymIter(Sym);
358 Sym = toDRI(++S, Sym.p & 1);
361 template <class ELFT>
362 std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym,
363 StringRef &Result) const {
364 const Elf_Sym *ESym = toELFSymIter(Sym);
365 ErrorOr<StringRef> Name = EF.getSymbolName(ESym, Sym.p & 1);
367 return Name.getError();
369 return std::error_code();
372 template <class ELFT>
373 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
374 return toELFShdrIter(Sec)->sh_flags;
377 template <class ELFT>
378 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
379 return toELFShdrIter(Sec)->sh_type;
382 template <class ELFT>
383 uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
384 const Elf_Sym *ESym = getSymbol(Symb);
385 switch (ESym->st_shndx) {
386 case ELF::SHN_COMMON:
388 return UnknownAddress;
390 return ESym->st_value;
393 const Elf_Ehdr *Header = EF.getHeader();
394 uint64_t Ret = ESym->st_value;
396 // Clear the ARM/Thumb or microMIPS indicator flag.
397 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
398 ESym->getType() == ELF::STT_FUNC)
404 template <class ELFT>
405 std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
406 uint64_t &Result) const {
407 Result = getSymbolValue(Symb);
408 const Elf_Sym *ESym = getSymbol(Symb);
409 switch (ESym->st_shndx) {
410 case ELF::SHN_COMMON:
413 return std::error_code();
416 const Elf_Ehdr *Header = EF.getHeader();
418 if (Header->e_type == ELF::ET_REL) {
419 const typename ELFFile<ELFT>::Elf_Shdr * Section = EF.getSection(ESym);
420 if (Section != nullptr)
421 Result += Section->sh_addr;
424 return std::error_code();
427 template <class ELFT>
428 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
429 const Elf_Sym *Sym = toELFSymIter(Symb);
430 if (Sym->st_shndx == ELF::SHN_COMMON)
431 return Sym->st_value;
435 template <class ELFT>
436 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
437 return toELFSymIter(Sym)->st_size;
440 template <class ELFT>
441 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
442 return toELFSymIter(Symb)->st_size;
445 template <class ELFT>
446 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
447 return toELFSymIter(Symb)->st_other;
450 template <class ELFT>
451 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
452 return toELFSymIter(Symb)->getType();
455 template <class ELFT>
456 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
457 const Elf_Sym *ESym = getSymbol(Symb);
459 switch (ESym->getType()) {
460 case ELF::STT_NOTYPE:
461 return SymbolRef::ST_Unknown;
462 case ELF::STT_SECTION:
463 return SymbolRef::ST_Debug;
465 return SymbolRef::ST_File;
467 return SymbolRef::ST_Function;
468 case ELF::STT_OBJECT:
469 case ELF::STT_COMMON:
471 return SymbolRef::ST_Data;
473 return SymbolRef::ST_Other;
477 template <class ELFT>
478 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
479 const Elf_Sym *ESym = toELFSymIter(Sym);
481 uint32_t Result = SymbolRef::SF_None;
483 if (ESym->getBinding() != ELF::STB_LOCAL)
484 Result |= SymbolRef::SF_Global;
486 if (ESym->getBinding() == ELF::STB_WEAK)
487 Result |= SymbolRef::SF_Weak;
489 if (ESym->st_shndx == ELF::SHN_ABS)
490 Result |= SymbolRef::SF_Absolute;
492 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
493 ESym == EF.begin_symbols() || ESym == EF.begin_dynamic_symbols())
494 Result |= SymbolRef::SF_FormatSpecific;
496 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
497 ErrorOr<StringRef> NameOrErr = EF.getSymbolName(ESym, Sym.p & 1);
499 StringRef Name = *NameOrErr;
500 if (Name.startswith("$d") || Name.startswith("$t") ||
501 Name.startswith("$a"))
502 Result |= SymbolRef::SF_FormatSpecific;
506 if (ESym->st_shndx == ELF::SHN_UNDEF)
507 Result |= SymbolRef::SF_Undefined;
509 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
510 Result |= SymbolRef::SF_Common;
512 if (isExportedToOtherDSO(ESym))
513 Result |= SymbolRef::SF_Exported;
515 if (ESym->getVisibility() == ELF::STV_HIDDEN)
516 Result |= SymbolRef::SF_Hidden;
521 template <class ELFT>
523 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
524 const Elf_Shdr *ESec = EF.getSection(ESym);
526 return section_end();
529 Sec.p = reinterpret_cast<intptr_t>(ESec);
530 return section_iterator(SectionRef(Sec, this));
534 template <class ELFT>
536 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
537 section_iterator &Res) const {
538 Res = getSymbolSection(getSymbol(Symb));
539 return std::error_code();
542 template <class ELFT>
543 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
544 Sec = toDRI(++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 Elf_Shdr_Iter 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 Elf_Shdr_Iter 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 Elf_Shdr_Iter 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>
606 bool ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
607 DataRefImpl Symb) const {
608 const Elf_Sym *ESym = toELFSymIter(Symb);
610 uintX_t Index = ESym->st_shndx;
611 bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
613 return !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
616 template <class ELFT>
618 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
620 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
621 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
623 return relocation_iterator(RelocationRef(RelData, this));
626 template <class ELFT>
628 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
630 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
631 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
632 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
633 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
636 RelData.d.b = S->sh_size / S->sh_entsize;
638 return relocation_iterator(RelocationRef(RelData, this));
641 template <class ELFT>
643 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
644 if (EF.getHeader()->e_type != ELF::ET_REL)
645 return section_end();
647 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
648 uintX_t Type = EShdr->sh_type;
649 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
650 return section_end();
652 const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
653 return section_iterator(SectionRef(toDRI(R), this));
657 template <class ELFT>
658 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
662 template <class ELFT>
664 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
666 const Elf_Shdr *sec = getRelSection(Rel);
667 if (sec->sh_type == ELF::SHT_REL)
668 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
670 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
674 const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
676 DataRefImpl SymbolData;
677 switch (SymSec->sh_type) {
679 report_fatal_error("Invalid symbol table section type!");
680 case ELF::SHT_SYMTAB:
681 SymbolData = toDRI(EF.begin_symbols() + symbolIdx, false);
683 case ELF::SHT_DYNSYM:
684 SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx, true);
688 return symbol_iterator(SymbolRef(SymbolData, this));
691 template <class ELFT>
693 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
694 uint64_t &Result) const {
695 uint64_t ROffset = getROffset(Rel);
696 const Elf_Ehdr *Header = EF.getHeader();
698 if (Header->e_type == ELF::ET_REL) {
699 const Elf_Shdr *RelocationSec = getRelSection(Rel);
700 const Elf_Shdr *RelocatedSec = EF.getSection(RelocationSec->sh_info);
701 Result = ROffset + RelocatedSec->sh_addr;
706 return std::error_code();
709 template <class ELFT>
710 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
711 assert(EF.getHeader()->e_type == ELF::ET_REL &&
712 "Only relocatable object files have relocation offsets");
713 return getROffset(Rel);
716 template <class ELFT>
717 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
718 const Elf_Shdr *sec = getRelSection(Rel);
719 if (sec->sh_type == ELF::SHT_REL)
720 return getRel(Rel)->r_offset;
722 return getRela(Rel)->r_offset;
725 template <class ELFT>
726 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
727 const Elf_Shdr *sec = getRelSection(Rel);
728 if (sec->sh_type == ELF::SHT_REL)
729 return getRel(Rel)->getType(EF.isMips64EL());
731 return getRela(Rel)->getType(EF.isMips64EL());
734 template <class ELFT>
735 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
736 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
739 template <class ELFT>
740 void ELFObjectFile<ELFT>::getRelocationTypeName(
741 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
742 uint32_t type = getRelocationType(Rel);
743 EF.getRelocationTypeName(type, Result);
746 template <class ELFT>
748 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
749 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
750 return object_error::parse_failed;
751 return (int64_t)getRela(Rel)->r_addend;
754 template <class ELFT>
755 const typename ELFFile<ELFT>::Elf_Sym *
756 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
757 return &*toELFSymIter(Symb);
760 template <class ELFT>
761 const typename ELFObjectFile<ELFT>::Elf_Rel *
762 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
763 assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
764 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
767 template <class ELFT>
768 const typename ELFObjectFile<ELFT>::Elf_Rela *
769 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
770 assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
771 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
774 template <class ELFT>
775 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
777 getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
781 EF(Data.getBuffer(), EC) {}
783 template <class ELFT>
784 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
785 DataRefImpl Sym = toDRI(EF.begin_symbols(), false);
786 return basic_symbol_iterator(SymbolRef(Sym, this));
789 template <class ELFT>
790 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
791 DataRefImpl Sym = toDRI(EF.end_symbols(), false);
792 return basic_symbol_iterator(SymbolRef(Sym, this));
795 template <class ELFT>
796 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
797 DataRefImpl Sym = toDRI(EF.begin_dynamic_symbols(), true);
798 return symbol_iterator(SymbolRef(Sym, this));
801 template <class ELFT>
802 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
803 DataRefImpl Sym = toDRI(EF.end_dynamic_symbols(), true);
804 return symbol_iterator(SymbolRef(Sym, this));
807 template <class ELFT>
808 section_iterator ELFObjectFile<ELFT>::section_begin() const {
809 return section_iterator(SectionRef(toDRI(EF.begin_sections()), this));
812 template <class ELFT>
813 section_iterator ELFObjectFile<ELFT>::section_end() const {
814 return section_iterator(SectionRef(toDRI(EF.end_sections()), this));
817 template <class ELFT>
818 StringRef ELFObjectFile<ELFT>::getLoadName() const {
819 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
820 Elf_Dyn_Iter DE = EF.end_dynamic_table();
822 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
826 return EF.getDynamicString(DI->getVal());
830 template <class ELFT>
831 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
832 return ELFT::Is64Bits ? 8 : 4;
835 template <class ELFT>
836 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
837 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
838 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
839 case ELF::ELFCLASS32:
840 switch (EF.getHeader()->e_machine) {
844 return "ELF32-x86-64";
846 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
847 case ELF::EM_HEXAGON:
848 return "ELF32-hexagon";
854 case ELF::EM_SPARC32PLUS:
855 return "ELF32-sparc";
857 return "ELF32-unknown";
859 case ELF::ELFCLASS64:
860 switch (EF.getHeader()->e_machine) {
864 return "ELF64-x86-64";
865 case ELF::EM_AARCH64:
866 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
868 return "ELF64-ppc64";
871 case ELF::EM_SPARCV9:
872 return "ELF64-sparc";
876 return "ELF64-unknown";
879 // FIXME: Proper error handling.
880 report_fatal_error("Invalid ELFCLASS!");
884 template <class ELFT>
885 unsigned ELFObjectFile<ELFT>::getArch() const {
886 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
887 switch (EF.getHeader()->e_machine) {
891 return Triple::x86_64;
892 case ELF::EM_AARCH64:
893 return Triple::aarch64;
896 case ELF::EM_HEXAGON:
897 return Triple::hexagon;
899 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
900 case ELF::ELFCLASS32:
901 return IsLittleEndian ? Triple::mipsel : Triple::mips;
902 case ELF::ELFCLASS64:
903 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
905 report_fatal_error("Invalid ELFCLASS!");
910 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
912 return Triple::systemz;
915 case ELF::EM_SPARC32PLUS:
916 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
917 case ELF::EM_SPARCV9:
918 return Triple::sparcv9;
921 return Triple::UnknownArch;
925 template <class ELFT>
926 ELFObjectFileBase::elf_symbol_iterator_range
927 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
928 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
931 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
932 return EF.getHeader()->e_type == ELF::ET_REL;