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 ELFObjectFileBase : public ObjectFile {
40 ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source);
43 virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
45 // FIXME: This is a bit of a hack. Every caller should know if it expecting
47 virtual bool hasRelocationAddend(DataRefImpl Rel) const = 0;
49 virtual symbol_iterator_range getDynamicSymbolIterators() const = 0;
51 virtual uint64_t getSectionFlags(SectionRef Sec) const = 0;
52 virtual uint32_t getSectionType(SectionRef Sec) const = 0;
54 virtual uint64_t getSymbolSize(SymbolRef Symb) const = 0;
56 static inline bool classof(const Binary *v) { return v->isELF(); }
59 template <class ELFT> class ELFObjectFile : public ELFObjectFileBase {
61 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
63 typedef typename ELFFile<ELFT>::uintX_t uintX_t;
65 typedef typename ELFFile<ELFT>::Elf_Sym Elf_Sym;
66 typedef typename ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
67 typedef typename ELFFile<ELFT>::Elf_Ehdr Elf_Ehdr;
68 typedef typename ELFFile<ELFT>::Elf_Rel Elf_Rel;
69 typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela;
70 typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn;
72 typedef typename ELFFile<ELFT>::Elf_Sym_Iter Elf_Sym_Iter;
73 typedef typename ELFFile<ELFT>::Elf_Shdr_Iter Elf_Shdr_Iter;
74 typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
76 uint64_t getSymbolSize(SymbolRef Symb) const override;
81 void moveSymbolNext(DataRefImpl &Symb) const override;
82 std::error_code getSymbolName(DataRefImpl Symb,
83 StringRef &Res) const override;
84 std::error_code getSymbolAddress(DataRefImpl Symb,
85 uint64_t &Res) const override;
86 uint64_t getSymbolValue(DataRefImpl Symb) const override;
87 uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
88 uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
89 uint32_t getSymbolFlags(DataRefImpl Symb) const override;
90 std::error_code getSymbolOther(DataRefImpl Symb, uint8_t &Res) const override;
91 std::error_code getSymbolType(DataRefImpl Symb,
92 SymbolRef::Type &Res) const override;
93 section_iterator getSymbolSection(const Elf_Sym *Symb) const;
94 std::error_code getSymbolSection(DataRefImpl Symb,
95 section_iterator &Res) const override;
97 void moveSectionNext(DataRefImpl &Sec) const override;
98 std::error_code getSectionName(DataRefImpl Sec,
99 StringRef &Res) const override;
100 uint64_t getSectionAddress(DataRefImpl Sec) const override;
101 uint64_t getSectionSize(DataRefImpl Sec) const override;
102 std::error_code getSectionContents(DataRefImpl Sec,
103 StringRef &Res) const override;
104 uint64_t getSectionAlignment(DataRefImpl Sec) const override;
105 bool isSectionText(DataRefImpl Sec) const override;
106 bool isSectionData(DataRefImpl Sec) const override;
107 bool isSectionBSS(DataRefImpl Sec) const override;
108 bool isSectionVirtual(DataRefImpl Sec) const override;
109 bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
110 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
111 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
112 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
114 void moveRelocationNext(DataRefImpl &Rel) const override;
115 std::error_code getRelocationAddress(DataRefImpl Rel,
116 uint64_t &Res) const override;
117 std::error_code getRelocationOffset(DataRefImpl Rel,
118 uint64_t &Res) const override;
119 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
120 std::error_code getRelocationType(DataRefImpl Rel,
121 uint64_t &Res) const override;
123 getRelocationTypeName(DataRefImpl Rel,
124 SmallVectorImpl<char> &Result) const override;
126 uint64_t getROffset(DataRefImpl Rel) const;
127 StringRef getRelocationTypeName(uint32_t Type) const;
129 /// \brief Get the relocation section that contains \a Rel.
130 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
131 return EF.getSection(Rel.d.a);
134 const Elf_Rel *getRel(DataRefImpl Rel) const;
135 const Elf_Rela *getRela(DataRefImpl Rela) const;
137 Elf_Sym_Iter toELFSymIter(DataRefImpl Symb) const {
138 bool IsDynamic = Symb.p & 1;
141 EF.begin_dynamic_symbols().getEntSize(),
142 reinterpret_cast<const char *>(Symb.p & ~uintptr_t(1)), IsDynamic);
143 return Elf_Sym_Iter(EF.begin_symbols().getEntSize(),
144 reinterpret_cast<const char *>(Symb.p), IsDynamic);
147 DataRefImpl toDRI(Elf_Sym_Iter Symb) const {
149 DRI.p = reinterpret_cast<uintptr_t>(Symb.get()) |
150 static_cast<uintptr_t>(Symb.isDynamic());
154 Elf_Shdr_Iter toELFShdrIter(DataRefImpl Sec) const {
155 return Elf_Shdr_Iter(EF.getHeader()->e_shentsize,
156 reinterpret_cast<const char *>(Sec.p));
159 DataRefImpl toDRI(Elf_Shdr_Iter Sec) const {
161 DRI.p = reinterpret_cast<uintptr_t>(Sec.get());
165 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
167 DRI.p = reinterpret_cast<uintptr_t>(Sec);
171 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
172 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
173 reinterpret_cast<const char *>(Dyn.p));
176 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
178 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
182 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
183 unsigned char Binding = ESym->getBinding();
184 unsigned char Visibility = ESym->getVisibility();
186 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
187 // visibility is either DEFAULT or PROTECTED. All other symbols are not
189 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
190 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
196 // This flag is used for classof, to distinguish ELFObjectFile from
197 // its subclass. If more subclasses will be created, this flag will
198 // have to become an enum.
199 bool isDyldELFObject;
202 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
204 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
206 basic_symbol_iterator symbol_begin_impl() const override;
207 basic_symbol_iterator symbol_end_impl() const override;
209 symbol_iterator dynamic_symbol_begin() const;
210 symbol_iterator dynamic_symbol_end() const;
212 section_iterator section_begin() const override;
213 section_iterator section_end() const override;
215 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
216 bool hasRelocationAddend(DataRefImpl Rel) const override;
218 uint64_t getSectionFlags(SectionRef Sec) const override;
219 uint32_t getSectionType(SectionRef Sec) const override;
221 uint8_t getBytesInAddress() const override;
222 StringRef getFileFormatName() const override;
223 unsigned getArch() const override;
224 StringRef getLoadName() const;
226 std::error_code getPlatformFlags(unsigned &Result) const override {
227 Result = EF.getHeader()->e_flags;
228 return std::error_code();
231 const ELFFile<ELFT> *getELFFile() const { return &EF; }
233 bool isDyldType() const { return isDyldELFObject; }
234 static inline bool classof(const Binary *v) {
235 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
239 symbol_iterator_range getDynamicSymbolIterators() const override;
241 bool isRelocatableObject() const override;
244 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
245 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
246 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
247 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
249 template <class ELFT>
250 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Symb) const {
251 Symb = toDRI(++toELFSymIter(Symb));
254 template <class ELFT>
255 std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb,
256 StringRef &Result) const {
257 ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb));
259 return Name.getError();
261 return std::error_code();
264 template <class ELFT>
265 uint64_t ELFObjectFile<ELFT>::getSectionFlags(SectionRef Sec) const {
266 DataRefImpl DRI = Sec.getRawDataRefImpl();
267 return toELFShdrIter(DRI)->sh_flags;
270 template <class ELFT>
271 uint32_t ELFObjectFile<ELFT>::getSectionType(SectionRef Sec) const {
272 DataRefImpl DRI = Sec.getRawDataRefImpl();
273 return toELFShdrIter(DRI)->sh_type;
276 template <class ELFT>
277 uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
278 const Elf_Sym *ESym = getSymbol(Symb);
279 switch (ESym->st_shndx) {
280 case ELF::SHN_COMMON:
282 return UnknownAddress;
284 return ESym->st_value;
287 const Elf_Ehdr *Header = EF.getHeader();
288 uint64_t Ret = ESym->st_value;
290 // Clear the ARM/Thumb or microMIPS indicator flag.
291 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
292 ESym->getType() == ELF::STT_FUNC)
298 template <class ELFT>
299 std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
300 uint64_t &Result) const {
301 Result = getSymbolValue(Symb);
302 const Elf_Sym *ESym = getSymbol(Symb);
303 switch (ESym->st_shndx) {
304 case ELF::SHN_COMMON:
307 return std::error_code();
310 const Elf_Ehdr *Header = EF.getHeader();
312 if (Header->e_type == ELF::ET_REL) {
313 const typename ELFFile<ELFT>::Elf_Shdr * Section = EF.getSection(ESym);
314 if (Section != nullptr)
315 Result += Section->sh_addr;
318 return std::error_code();
321 template <class ELFT>
322 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
323 Elf_Sym_Iter Sym = toELFSymIter(Symb);
324 if (Sym->st_shndx == ELF::SHN_COMMON)
325 return Sym->st_value;
329 template <class ELFT>
330 uint64_t ELFObjectFile<ELFT>::getSymbolSize(SymbolRef Symb) const {
331 return toELFSymIter(Symb.getRawDataRefImpl())->st_size;
334 template <class ELFT>
335 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
336 return toELFSymIter(Symb)->st_size;
339 template <class ELFT>
340 std::error_code ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb,
341 uint8_t &Result) const {
342 Result = toELFSymIter(Symb)->st_other;
343 return std::error_code();
346 template <class ELFT>
348 ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb,
349 SymbolRef::Type &Result) const {
350 const Elf_Sym *ESym = getSymbol(Symb);
352 switch (ESym->getType()) {
353 case ELF::STT_NOTYPE:
354 Result = SymbolRef::ST_Unknown;
356 case ELF::STT_SECTION:
357 Result = SymbolRef::ST_Debug;
360 Result = SymbolRef::ST_File;
363 Result = SymbolRef::ST_Function;
365 case ELF::STT_OBJECT:
366 case ELF::STT_COMMON:
368 Result = SymbolRef::ST_Data;
371 Result = SymbolRef::ST_Other;
374 return std::error_code();
377 template <class ELFT>
378 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
379 Elf_Sym_Iter EIter = toELFSymIter(Symb);
380 const Elf_Sym *ESym = &*EIter;
382 uint32_t Result = SymbolRef::SF_None;
384 if (ESym->getBinding() != ELF::STB_LOCAL)
385 Result |= SymbolRef::SF_Global;
387 if (ESym->getBinding() == ELF::STB_WEAK)
388 Result |= SymbolRef::SF_Weak;
390 if (ESym->st_shndx == ELF::SHN_ABS)
391 Result |= SymbolRef::SF_Absolute;
393 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
394 EIter == EF.begin_symbols() || EIter == EF.begin_dynamic_symbols())
395 Result |= SymbolRef::SF_FormatSpecific;
397 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
398 if (ErrorOr<StringRef> NameOrErr = EF.getSymbolName(EIter)) {
399 StringRef Name = *NameOrErr;
400 if (Name.startswith("$d") || Name.startswith("$t") ||
401 Name.startswith("$a"))
402 Result |= SymbolRef::SF_FormatSpecific;
406 if (ESym->st_shndx == ELF::SHN_UNDEF)
407 Result |= SymbolRef::SF_Undefined;
409 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
410 Result |= SymbolRef::SF_Common;
412 if (isExportedToOtherDSO(ESym))
413 Result |= SymbolRef::SF_Exported;
415 if (ESym->getVisibility() == ELF::STV_HIDDEN)
416 Result |= SymbolRef::SF_Hidden;
421 template <class ELFT>
423 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
424 const Elf_Shdr *ESec = EF.getSection(ESym);
426 return section_end();
429 Sec.p = reinterpret_cast<intptr_t>(ESec);
430 return section_iterator(SectionRef(Sec, this));
434 template <class ELFT>
436 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
437 section_iterator &Res) const {
438 Res = getSymbolSection(getSymbol(Symb));
439 return std::error_code();
442 template <class ELFT>
443 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
444 Sec = toDRI(++toELFShdrIter(Sec));
447 template <class ELFT>
448 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
449 StringRef &Result) const {
450 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
452 return Name.getError();
454 return std::error_code();
457 template <class ELFT>
458 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
459 return toELFShdrIter(Sec)->sh_addr;
462 template <class ELFT>
463 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
464 return toELFShdrIter(Sec)->sh_size;
467 template <class ELFT>
469 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
470 StringRef &Result) const {
471 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
472 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
473 return std::error_code();
476 template <class ELFT>
477 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
478 return toELFShdrIter(Sec)->sh_addralign;
481 template <class ELFT>
482 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
483 return toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
486 template <class ELFT>
487 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
488 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
489 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
490 EShdr->sh_type == ELF::SHT_PROGBITS;
493 template <class ELFT>
494 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
495 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
496 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
497 EShdr->sh_type == ELF::SHT_NOBITS;
500 template <class ELFT>
501 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
502 return toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
505 template <class ELFT>
506 bool ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
507 DataRefImpl Symb) const {
508 Elf_Sym_Iter ESym = toELFSymIter(Symb);
510 uintX_t Index = ESym->st_shndx;
511 bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
513 return !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
516 template <class ELFT>
518 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
520 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
521 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
523 return relocation_iterator(RelocationRef(RelData, this));
526 template <class ELFT>
528 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
530 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
531 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
532 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
533 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
536 RelData.d.b = S->sh_size / S->sh_entsize;
538 return relocation_iterator(RelocationRef(RelData, this));
541 template <class ELFT>
543 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
544 if (EF.getHeader()->e_type != ELF::ET_REL)
545 return section_end();
547 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
548 uintX_t Type = EShdr->sh_type;
549 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
550 return section_end();
552 const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
553 return section_iterator(SectionRef(toDRI(R), this));
557 template <class ELFT>
558 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
562 template <class ELFT>
564 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
566 const Elf_Shdr *sec = getRelSection(Rel);
567 switch (sec->sh_type) {
569 report_fatal_error("Invalid section type in Rel!");
571 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
574 case ELF::SHT_RELA: {
575 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
582 const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
584 DataRefImpl SymbolData;
585 switch (SymSec->sh_type) {
587 report_fatal_error("Invalid symbol table section type!");
588 case ELF::SHT_SYMTAB:
589 SymbolData = toDRI(EF.begin_symbols() + symbolIdx);
591 case ELF::SHT_DYNSYM:
592 SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx);
596 return symbol_iterator(SymbolRef(SymbolData, this));
599 template <class ELFT>
601 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
602 uint64_t &Result) const {
603 uint64_t ROffset = getROffset(Rel);
604 const Elf_Ehdr *Header = EF.getHeader();
606 if (Header->e_type == ELF::ET_REL) {
607 const Elf_Shdr *RelocationSec = getRelSection(Rel);
608 const Elf_Shdr *RelocatedSec = EF.getSection(RelocationSec->sh_info);
609 Result = ROffset + RelocatedSec->sh_addr;
614 return std::error_code();
617 template <class ELFT>
619 ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel,
620 uint64_t &Result) const {
621 assert(EF.getHeader()->e_type == ELF::ET_REL &&
622 "Only relocatable object files have relocation offsets");
623 Result = getROffset(Rel);
624 return std::error_code();
627 template <class ELFT>
628 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
629 const Elf_Shdr *sec = getRelSection(Rel);
630 switch (sec->sh_type) {
632 report_fatal_error("Invalid section type in Rel!");
634 return getRel(Rel)->r_offset;
636 return getRela(Rel)->r_offset;
640 template <class ELFT>
641 std::error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel,
642 uint64_t &Result) const {
643 const Elf_Shdr *sec = getRelSection(Rel);
644 switch (sec->sh_type) {
646 report_fatal_error("Invalid section type in Rel!");
648 Result = getRel(Rel)->getType(EF.isMips64EL());
651 case ELF::SHT_RELA: {
652 Result = getRela(Rel)->getType(EF.isMips64EL());
656 return std::error_code();
659 template <class ELFT>
660 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
661 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
664 template <class ELFT>
665 std::error_code ELFObjectFile<ELFT>::getRelocationTypeName(
666 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
667 const Elf_Shdr *sec = getRelSection(Rel);
669 switch (sec->sh_type) {
671 return object_error::parse_failed;
673 type = getRel(Rel)->getType(EF.isMips64EL());
676 case ELF::SHT_RELA: {
677 type = getRela(Rel)->getType(EF.isMips64EL());
682 EF.getRelocationTypeName(type, Result);
683 return std::error_code();
686 template <class ELFT>
688 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
689 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
690 return object_error::parse_failed;
691 return (int64_t)getRela(Rel)->r_addend;
694 template <class ELFT>
695 bool ELFObjectFile<ELFT>::hasRelocationAddend(DataRefImpl Rel) const {
696 return getRelSection(Rel)->sh_type == ELF::SHT_RELA;
699 template <class ELFT>
700 const typename ELFFile<ELFT>::Elf_Sym *
701 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
702 return &*toELFSymIter(Symb);
705 template <class ELFT>
706 const typename ELFObjectFile<ELFT>::Elf_Rel *
707 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
708 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
711 template <class ELFT>
712 const typename ELFObjectFile<ELFT>::Elf_Rela *
713 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
714 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
717 template <class ELFT>
718 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
720 getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
724 EF(Data.getBuffer(), EC) {}
726 template <class ELFT>
727 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
728 return basic_symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this));
731 template <class ELFT>
732 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
733 return basic_symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this));
736 template <class ELFT>
737 symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
738 return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this));
741 template <class ELFT>
742 symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
743 return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this));
746 template <class ELFT>
747 section_iterator ELFObjectFile<ELFT>::section_begin() const {
748 return section_iterator(SectionRef(toDRI(EF.begin_sections()), this));
751 template <class ELFT>
752 section_iterator ELFObjectFile<ELFT>::section_end() const {
753 return section_iterator(SectionRef(toDRI(EF.end_sections()), this));
756 template <class ELFT>
757 StringRef ELFObjectFile<ELFT>::getLoadName() const {
758 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
759 Elf_Dyn_Iter DE = EF.end_dynamic_table();
761 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
765 return EF.getDynamicString(DI->getVal());
769 template <class ELFT>
770 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
771 return ELFT::Is64Bits ? 8 : 4;
774 template <class ELFT>
775 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
776 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
777 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
778 case ELF::ELFCLASS32:
779 switch (EF.getHeader()->e_machine) {
783 return "ELF32-x86-64";
785 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
786 case ELF::EM_HEXAGON:
787 return "ELF32-hexagon";
793 case ELF::EM_SPARC32PLUS:
794 return "ELF32-sparc";
796 return "ELF32-unknown";
798 case ELF::ELFCLASS64:
799 switch (EF.getHeader()->e_machine) {
803 return "ELF64-x86-64";
804 case ELF::EM_AARCH64:
805 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
807 return "ELF64-ppc64";
810 case ELF::EM_SPARCV9:
811 return "ELF64-sparc";
815 return "ELF64-unknown";
818 // FIXME: Proper error handling.
819 report_fatal_error("Invalid ELFCLASS!");
823 template <class ELFT>
824 unsigned ELFObjectFile<ELFT>::getArch() const {
825 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
826 switch (EF.getHeader()->e_machine) {
830 return Triple::x86_64;
831 case ELF::EM_AARCH64:
832 return Triple::aarch64;
835 case ELF::EM_HEXAGON:
836 return Triple::hexagon;
838 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
839 case ELF::ELFCLASS32:
840 return IsLittleEndian ? Triple::mipsel : Triple::mips;
841 case ELF::ELFCLASS64:
842 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
844 report_fatal_error("Invalid ELFCLASS!");
849 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
851 return Triple::systemz;
854 case ELF::EM_SPARC32PLUS:
855 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
856 case ELF::EM_SPARCV9:
857 return Triple::sparcv9;
860 return Triple::UnknownArch;
864 template <class ELFT>
865 ObjectFile::symbol_iterator_range
866 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
867 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
870 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
871 return EF.getHeader()->e_type == ELF::ET_REL;