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;
195 const Elf_Shdr *DotDynSymSec = nullptr; // Dynamic symbol table section.
196 const Elf_Shdr *DotSymtabSec = nullptr; // Symbol table section.
198 void moveSymbolNext(DataRefImpl &Symb) const override;
199 ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override;
200 ErrorOr<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
201 uint64_t getSymbolValueImpl(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 ErrorOr<section_iterator> getSymbolSection(const Elf_Sym *Symb) const;
209 ErrorOr<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
211 void moveSectionNext(DataRefImpl &Sec) const override;
212 std::error_code getSectionName(DataRefImpl Sec,
213 StringRef &Res) const override;
214 uint64_t getSectionAddress(DataRefImpl Sec) const override;
215 uint64_t getSectionSize(DataRefImpl Sec) const override;
216 std::error_code getSectionContents(DataRefImpl Sec,
217 StringRef &Res) const override;
218 uint64_t getSectionAlignment(DataRefImpl Sec) const override;
219 bool isSectionText(DataRefImpl Sec) const override;
220 bool isSectionData(DataRefImpl Sec) const override;
221 bool isSectionBSS(DataRefImpl Sec) const override;
222 bool isSectionVirtual(DataRefImpl Sec) const override;
223 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
224 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
225 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
227 void moveRelocationNext(DataRefImpl &Rel) const override;
228 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
229 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
230 uint64_t getRelocationType(DataRefImpl Rel) const override;
231 void getRelocationTypeName(DataRefImpl Rel,
232 SmallVectorImpl<char> &Result) const override;
234 uint32_t getSectionType(DataRefImpl Sec) const override;
235 uint64_t getSectionFlags(DataRefImpl Sec) const override;
236 StringRef getRelocationTypeName(uint32_t Type) const;
238 /// \brief Get the relocation section that contains \a Rel.
239 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
240 return *EF.getSection(Rel.d.a);
243 DataRefImpl toDRI(const Elf_Shdr *SymTable, unsigned SymbolNum) const {
250 assert(SymTable->sh_type == ELF::SHT_SYMTAB ||
251 SymTable->sh_type == ELF::SHT_DYNSYM);
253 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
254 unsigned SymTableIndex =
255 (reinterpret_cast<uintptr_t>(SymTable) - SHT) / sizeof(Elf_Shdr);
257 DRI.d.a = SymTableIndex;
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 DataRefImpl toDRI(const Elf_Dyn *Dyn) const {
274 DRI.p = reinterpret_cast<uintptr_t>(Dyn);
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 Sym) const {
304 return EF.template getEntry<Elf_Sym>(Sym.d.a, Sym.d.b);
307 const Elf_Shdr *getSection(DataRefImpl Sec) const {
308 return reinterpret_cast<const Elf_Shdr *>(Sec.p);
311 basic_symbol_iterator symbol_begin_impl() const override;
312 basic_symbol_iterator symbol_end_impl() const override;
314 elf_symbol_iterator dynamic_symbol_begin() const;
315 elf_symbol_iterator dynamic_symbol_end() const;
317 section_iterator section_begin() const override;
318 section_iterator section_end() const override;
320 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
322 uint8_t getBytesInAddress() const override;
323 StringRef getFileFormatName() const override;
324 unsigned getArch() const override;
326 std::error_code getPlatformFlags(unsigned &Result) const override {
327 Result = EF.getHeader()->e_flags;
328 return std::error_code();
331 const ELFFile<ELFT> *getELFFile() const { return &EF; }
333 bool isDyldType() const { return isDyldELFObject; }
334 static inline bool classof(const Binary *v) {
335 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
339 elf_symbol_iterator_range getDynamicSymbolIterators() const override;
341 bool isRelocatableObject() const override;
344 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
345 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
346 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
347 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
349 template <class ELFT>
350 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
354 template <class ELFT>
355 ErrorOr<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const {
356 const Elf_Sym *ESym = getSymbol(Sym);
357 const Elf_Shdr *SymTableSec = *EF.getSection(Sym.d.a);
358 const Elf_Shdr *StringTableSec = *EF.getSection(SymTableSec->sh_link);
359 StringRef SymTable = *EF.getStringTable(StringTableSec);
360 return ESym->getName(SymTable);
363 template <class ELFT>
364 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
365 return getSection(Sec)->sh_flags;
368 template <class ELFT>
369 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
370 return getSection(Sec)->sh_type;
373 template <class ELFT>
374 uint64_t ELFObjectFile<ELFT>::getSymbolValueImpl(DataRefImpl Symb) const {
375 const Elf_Sym *ESym = getSymbol(Symb);
376 uint64_t Ret = ESym->st_value;
377 if (ESym->st_shndx == ELF::SHN_ABS)
380 const Elf_Ehdr *Header = EF.getHeader();
381 // Clear the ARM/Thumb or microMIPS indicator flag.
382 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
383 ESym->getType() == ELF::STT_FUNC)
389 template <class ELFT>
391 ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb) const {
392 uint64_t Result = getSymbolValue(Symb);
393 const Elf_Sym *ESym = getSymbol(Symb);
394 switch (ESym->st_shndx) {
395 case ELF::SHN_COMMON:
401 const Elf_Ehdr *Header = EF.getHeader();
403 if (Header->e_type == ELF::ET_REL) {
404 ErrorOr<const Elf_Shdr *> SectionOrErr = EF.getSection(ESym);
405 if (std::error_code EC = SectionOrErr.getError())
407 const Elf_Shdr *Section = *SectionOrErr;
409 Result += Section->sh_addr;
415 template <class ELFT>
416 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
417 const Elf_Sym *Sym = getSymbol(Symb);
418 if (Sym->st_shndx == ELF::SHN_COMMON)
419 return Sym->st_value;
423 template <class ELFT>
424 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
425 return getSymbol(Sym)->st_size;
428 template <class ELFT>
429 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
430 return getSymbol(Symb)->st_size;
433 template <class ELFT>
434 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
435 return getSymbol(Symb)->st_other;
438 template <class ELFT>
439 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
440 return getSymbol(Symb)->getType();
443 template <class ELFT>
444 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
445 const Elf_Sym *ESym = getSymbol(Symb);
447 switch (ESym->getType()) {
448 case ELF::STT_NOTYPE:
449 return SymbolRef::ST_Unknown;
450 case ELF::STT_SECTION:
451 return SymbolRef::ST_Debug;
453 return SymbolRef::ST_File;
455 return SymbolRef::ST_Function;
456 case ELF::STT_OBJECT:
457 case ELF::STT_COMMON:
459 return SymbolRef::ST_Data;
461 return SymbolRef::ST_Other;
465 template <class ELFT>
466 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
467 const Elf_Sym *ESym = getSymbol(Sym);
469 uint32_t Result = SymbolRef::SF_None;
471 if (ESym->getBinding() != ELF::STB_LOCAL)
472 Result |= SymbolRef::SF_Global;
474 if (ESym->getBinding() == ELF::STB_WEAK)
475 Result |= SymbolRef::SF_Weak;
477 if (ESym->st_shndx == ELF::SHN_ABS)
478 Result |= SymbolRef::SF_Absolute;
480 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
481 ESym == EF.symbol_begin(DotSymtabSec) ||
482 ESym == EF.symbol_begin(DotDynSymSec))
483 Result |= SymbolRef::SF_FormatSpecific;
485 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
486 if (ErrorOr<StringRef> NameOrErr = getSymbolName(Sym)) {
487 StringRef Name = *NameOrErr;
488 if (Name.startswith("$d") || Name.startswith("$t") ||
489 Name.startswith("$a"))
490 Result |= SymbolRef::SF_FormatSpecific;
494 if (ESym->st_shndx == ELF::SHN_UNDEF)
495 Result |= SymbolRef::SF_Undefined;
497 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
498 Result |= SymbolRef::SF_Common;
500 if (isExportedToOtherDSO(ESym))
501 Result |= SymbolRef::SF_Exported;
503 if (ESym->getVisibility() == ELF::STV_HIDDEN)
504 Result |= SymbolRef::SF_Hidden;
509 template <class ELFT>
510 ErrorOr<section_iterator>
511 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
512 ErrorOr<const Elf_Shdr *> ESecOrErr = EF.getSection(ESym);
513 if (std::error_code EC = ESecOrErr.getError())
516 const Elf_Shdr *ESec = *ESecOrErr;
518 return section_end();
521 Sec.p = reinterpret_cast<intptr_t>(ESec);
522 return section_iterator(SectionRef(Sec, this));
525 template <class ELFT>
526 ErrorOr<section_iterator>
527 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb) const {
528 return getSymbolSection(getSymbol(Symb));
531 template <class ELFT>
532 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
533 const Elf_Shdr *ESec = getSection(Sec);
537 template <class ELFT>
538 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
539 StringRef &Result) const {
540 ErrorOr<StringRef> Name = EF.getSectionName(&*getSection(Sec));
542 return Name.getError();
544 return std::error_code();
547 template <class ELFT>
548 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
549 return getSection(Sec)->sh_addr;
552 template <class ELFT>
553 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
554 return getSection(Sec)->sh_size;
557 template <class ELFT>
559 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
560 StringRef &Result) const {
561 const Elf_Shdr *EShdr = getSection(Sec);
562 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
563 return std::error_code();
566 template <class ELFT>
567 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
568 return getSection(Sec)->sh_addralign;
571 template <class ELFT>
572 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
573 return getSection(Sec)->sh_flags & ELF::SHF_EXECINSTR;
576 template <class ELFT>
577 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
578 const Elf_Shdr *EShdr = getSection(Sec);
579 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
580 EShdr->sh_type == ELF::SHT_PROGBITS;
583 template <class ELFT>
584 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
585 const Elf_Shdr *EShdr = getSection(Sec);
586 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
587 EShdr->sh_type == ELF::SHT_NOBITS;
590 template <class ELFT>
591 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
592 return getSection(Sec)->sh_type == ELF::SHT_NOBITS;
595 template <class ELFT>
597 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
599 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
600 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
603 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
604 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
605 return relocation_iterator(RelocationRef(RelData, this));
607 const Elf_Shdr *RelSec = getRelSection(RelData);
608 ErrorOr<const Elf_Shdr *> SymSecOrErr = EF.getSection(RelSec->sh_link);
609 if (std::error_code EC = SymSecOrErr.getError())
610 report_fatal_error(EC.message());
611 const Elf_Shdr *SymSec = *SymSecOrErr;
612 uint32_t SymSecType = SymSec->sh_type;
613 if (SymSecType != ELF::SHT_SYMTAB && SymSecType != ELF::SHT_DYNSYM)
614 report_fatal_error("Invalid symbol table section type!");
615 if (SymSecType == ELF::SHT_DYNSYM)
618 return relocation_iterator(RelocationRef(RelData, this));
621 template <class ELFT>
623 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
624 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
625 relocation_iterator Begin = section_rel_begin(Sec);
626 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
628 DataRefImpl RelData = Begin->getRawDataRefImpl();
629 RelData.d.b += (S->sh_size / S->sh_entsize) << 1;
630 return relocation_iterator(RelocationRef(RelData, this));
633 template <class ELFT>
635 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
636 if (EF.getHeader()->e_type != ELF::ET_REL)
637 return section_end();
639 const Elf_Shdr *EShdr = getSection(Sec);
640 uintX_t Type = EShdr->sh_type;
641 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
642 return section_end();
644 ErrorOr<const Elf_Shdr *> R = EF.getSection(EShdr->sh_info);
645 if (std::error_code EC = R.getError())
646 report_fatal_error(EC.message());
647 return section_iterator(SectionRef(toDRI(*R), this));
651 template <class ELFT>
652 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
656 template <class ELFT>
658 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
660 const Elf_Shdr *sec = getRelSection(Rel);
661 if (sec->sh_type == ELF::SHT_REL)
662 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
664 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
668 bool IsDyn = Rel.d.b & 1;
669 DataRefImpl SymbolData;
671 SymbolData = toDRI(DotDynSymSec, symbolIdx);
673 SymbolData = toDRI(DotSymtabSec, symbolIdx);
674 return symbol_iterator(SymbolRef(SymbolData, this));
677 template <class ELFT>
678 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
679 assert(EF.getHeader()->e_type == ELF::ET_REL &&
680 "Only relocatable object files have relocation offsets");
681 const Elf_Shdr *sec = getRelSection(Rel);
682 if (sec->sh_type == ELF::SHT_REL)
683 return getRel(Rel)->r_offset;
685 return getRela(Rel)->r_offset;
688 template <class ELFT>
689 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
690 const Elf_Shdr *sec = getRelSection(Rel);
691 if (sec->sh_type == ELF::SHT_REL)
692 return getRel(Rel)->getType(EF.isMips64EL());
694 return getRela(Rel)->getType(EF.isMips64EL());
697 template <class ELFT>
698 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
699 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
702 template <class ELFT>
703 void ELFObjectFile<ELFT>::getRelocationTypeName(
704 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
705 uint32_t type = getRelocationType(Rel);
706 EF.getRelocationTypeName(type, Result);
709 template <class ELFT>
711 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
712 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
713 return object_error::parse_failed;
714 return (int64_t)getRela(Rel)->r_addend;
717 template <class ELFT>
718 const typename ELFObjectFile<ELFT>::Elf_Rel *
719 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
720 assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
721 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b >> 1);
724 template <class ELFT>
725 const typename ELFObjectFile<ELFT>::Elf_Rela *
726 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
727 assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
728 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b >> 1);
731 template <class ELFT>
732 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
734 getELFType(ELFT::TargetEndianness == support::little, ELFT::Is64Bits),
736 EF(Data.getBuffer(), EC) {
739 for (const Elf_Shdr &Sec : EF.sections()) {
740 switch (Sec.sh_type) {
741 case ELF::SHT_DYNSYM: {
743 // More than one .dynsym!
744 EC = object_error::parse_failed;
750 case ELF::SHT_SYMTAB: {
752 // More than one .dynsym!
753 EC = object_error::parse_failed;
763 template <class ELFT>
764 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
765 DataRefImpl Sym = toDRI(DotSymtabSec, 0);
766 return basic_symbol_iterator(SymbolRef(Sym, this));
769 template <class ELFT>
770 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
771 const Elf_Shdr *SymTab = DotSymtabSec;
773 return symbol_begin_impl();
774 DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
775 return basic_symbol_iterator(SymbolRef(Sym, this));
778 template <class ELFT>
779 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
780 DataRefImpl Sym = toDRI(DotDynSymSec, 0);
781 return symbol_iterator(SymbolRef(Sym, this));
784 template <class ELFT>
785 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
786 const Elf_Shdr *SymTab = DotDynSymSec;
787 DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
788 return basic_symbol_iterator(SymbolRef(Sym, this));
791 template <class ELFT>
792 section_iterator ELFObjectFile<ELFT>::section_begin() const {
793 return section_iterator(SectionRef(toDRI(EF.section_begin()), this));
796 template <class ELFT>
797 section_iterator ELFObjectFile<ELFT>::section_end() const {
798 return section_iterator(SectionRef(toDRI(EF.section_end()), this));
801 template <class ELFT>
802 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
803 return ELFT::Is64Bits ? 8 : 4;
806 template <class ELFT>
807 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
808 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
809 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
810 case ELF::ELFCLASS32:
811 switch (EF.getHeader()->e_machine) {
815 return "ELF32-x86-64";
817 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
818 case ELF::EM_HEXAGON:
819 return "ELF32-hexagon";
825 case ELF::EM_SPARC32PLUS:
826 return "ELF32-sparc";
828 return "ELF32-unknown";
830 case ELF::ELFCLASS64:
831 switch (EF.getHeader()->e_machine) {
835 return "ELF64-x86-64";
836 case ELF::EM_AARCH64:
837 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
839 return "ELF64-ppc64";
842 case ELF::EM_SPARCV9:
843 return "ELF64-sparc";
847 return "ELF64-unknown";
850 // FIXME: Proper error handling.
851 report_fatal_error("Invalid ELFCLASS!");
855 template <class ELFT>
856 unsigned ELFObjectFile<ELFT>::getArch() const {
857 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
858 switch (EF.getHeader()->e_machine) {
862 return Triple::x86_64;
863 case ELF::EM_AARCH64:
864 return Triple::aarch64;
867 case ELF::EM_HEXAGON:
868 return Triple::hexagon;
870 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
871 case ELF::ELFCLASS32:
872 return IsLittleEndian ? Triple::mipsel : Triple::mips;
873 case ELF::ELFCLASS64:
874 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
876 report_fatal_error("Invalid ELFCLASS!");
881 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
883 return Triple::systemz;
886 case ELF::EM_SPARC32PLUS:
887 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
888 case ELF::EM_SPARCV9:
889 return Triple::sparcv9;
892 return Triple::UnknownArch;
896 template <class ELFT>
897 ELFObjectFileBase::elf_symbol_iterator_range
898 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
899 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
902 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
903 return EF.getHeader()->e_type == ELF::ET_REL;