1 //===- ELFObjectFile.h - ELF object file implementation ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the ELFObjectFile template class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_OBJECT_ELFOBJECTFILE_H
15 #define LLVM_OBJECT_ELFOBJECTFILE_H
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/ADT/PointerIntPair.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/ADT/StringSwitch.h"
21 #include "llvm/ADT/Triple.h"
22 #include "llvm/Object/ELF.h"
23 #include "llvm/Object/ObjectFile.h"
24 #include "llvm/Support/Casting.h"
25 #include "llvm/Support/ELF.h"
26 #include "llvm/Support/Endian.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/MemoryBuffer.h"
29 #include "llvm/Support/raw_ostream.h"
38 class elf_symbol_iterator;
40 class ELFRelocationRef;
42 class ELFObjectFileBase : public ObjectFile {
43 friend class ELFSymbolRef;
44 friend class ELFSectionRef;
45 friend class ELFRelocationRef;
48 ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source);
50 virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
51 virtual uint8_t getSymbolOther(DataRefImpl Symb) const = 0;
52 virtual uint8_t getSymbolELFType(DataRefImpl Symb) const = 0;
54 virtual uint32_t getSectionType(DataRefImpl Sec) const = 0;
55 virtual uint64_t getSectionFlags(DataRefImpl Sec) const = 0;
57 virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
60 typedef iterator_range<elf_symbol_iterator> elf_symbol_iterator_range;
61 virtual elf_symbol_iterator_range getDynamicSymbolIterators() const = 0;
63 elf_symbol_iterator_range symbols() const;
65 static inline bool classof(const Binary *v) { return v->isELF(); }
68 class ELFSectionRef : public SectionRef {
70 ELFSectionRef(const SectionRef &B) : SectionRef(B) {
71 assert(isa<ELFObjectFileBase>(SectionRef::getObject()));
74 const ELFObjectFileBase *getObject() const {
75 return cast<ELFObjectFileBase>(SectionRef::getObject());
78 uint32_t getType() const {
79 return getObject()->getSectionType(getRawDataRefImpl());
82 uint64_t getFlags() const {
83 return getObject()->getSectionFlags(getRawDataRefImpl());
87 class elf_section_iterator : public section_iterator {
89 elf_section_iterator(const section_iterator &B) : section_iterator(B) {
90 assert(isa<ELFObjectFileBase>(B->getObject()));
93 const ELFSectionRef *operator->() const {
94 return static_cast<const ELFSectionRef *>(section_iterator::operator->());
97 const ELFSectionRef &operator*() const {
98 return static_cast<const ELFSectionRef &>(section_iterator::operator*());
102 class ELFSymbolRef : public SymbolRef {
104 ELFSymbolRef(const SymbolRef &B) : SymbolRef(B) {
105 assert(isa<ELFObjectFileBase>(SymbolRef::getObject()));
108 const ELFObjectFileBase *getObject() const {
109 return cast<ELFObjectFileBase>(BasicSymbolRef::getObject());
112 uint64_t getSize() const {
113 return getObject()->getSymbolSize(getRawDataRefImpl());
116 uint8_t getOther() const {
117 return getObject()->getSymbolOther(getRawDataRefImpl());
120 uint8_t getELFType() const {
121 return getObject()->getSymbolELFType(getRawDataRefImpl());
125 class elf_symbol_iterator : public symbol_iterator {
127 elf_symbol_iterator(const basic_symbol_iterator &B)
128 : symbol_iterator(SymbolRef(B->getRawDataRefImpl(),
129 cast<ELFObjectFileBase>(B->getObject()))) {}
131 const ELFSymbolRef *operator->() const {
132 return static_cast<const ELFSymbolRef *>(symbol_iterator::operator->());
135 const ELFSymbolRef &operator*() const {
136 return static_cast<const ELFSymbolRef &>(symbol_iterator::operator*());
140 class ELFRelocationRef : public RelocationRef {
142 ELFRelocationRef(const RelocationRef &B) : RelocationRef(B) {
143 assert(isa<ELFObjectFileBase>(RelocationRef::getObject()));
146 const ELFObjectFileBase *getObject() const {
147 return cast<ELFObjectFileBase>(RelocationRef::getObject());
150 ErrorOr<int64_t> getAddend() const {
151 return getObject()->getRelocationAddend(getRawDataRefImpl());
155 class elf_relocation_iterator : public relocation_iterator {
157 elf_relocation_iterator(const relocation_iterator &B)
158 : relocation_iterator(RelocationRef(
159 B->getRawDataRefImpl(), cast<ELFObjectFileBase>(B->getObject()))) {}
161 const ELFRelocationRef *operator->() const {
162 return static_cast<const ELFRelocationRef *>(
163 relocation_iterator::operator->());
166 const ELFRelocationRef &operator*() const {
167 return static_cast<const ELFRelocationRef &>(
168 relocation_iterator::operator*());
172 inline ELFObjectFileBase::elf_symbol_iterator_range
173 ELFObjectFileBase::symbols() const {
174 return elf_symbol_iterator_range(symbol_begin(), symbol_end());
177 template <class ELFT> class ELFObjectFile : public ELFObjectFileBase {
178 uint64_t getSymbolSize(DataRefImpl Sym) const override;
181 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
183 typedef typename ELFFile<ELFT>::uintX_t uintX_t;
185 typedef typename ELFFile<ELFT>::Elf_Sym Elf_Sym;
186 typedef typename ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
187 typedef typename ELFFile<ELFT>::Elf_Ehdr Elf_Ehdr;
188 typedef typename ELFFile<ELFT>::Elf_Rel Elf_Rel;
189 typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela;
190 typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn;
192 typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
197 void moveSymbolNext(DataRefImpl &Symb) const override;
198 std::error_code getSymbolName(DataRefImpl Symb,
199 StringRef &Res) const override;
200 std::error_code getSymbolAddress(DataRefImpl Symb,
201 uint64_t &Res) const override;
202 uint64_t getSymbolValue(DataRefImpl Symb) const override;
203 uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
204 uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
205 uint32_t getSymbolFlags(DataRefImpl Symb) const override;
206 uint8_t getSymbolOther(DataRefImpl Symb) const override;
207 uint8_t getSymbolELFType(DataRefImpl Symb) const override;
208 SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
209 section_iterator getSymbolSection(const Elf_Sym *Symb) const;
210 std::error_code getSymbolSection(DataRefImpl Symb,
211 section_iterator &Res) const override;
213 void moveSectionNext(DataRefImpl &Sec) const override;
214 std::error_code getSectionName(DataRefImpl Sec,
215 StringRef &Res) const override;
216 uint64_t getSectionAddress(DataRefImpl Sec) const override;
217 uint64_t getSectionSize(DataRefImpl Sec) const override;
218 std::error_code getSectionContents(DataRefImpl Sec,
219 StringRef &Res) const override;
220 uint64_t getSectionAlignment(DataRefImpl Sec) const override;
221 bool isSectionText(DataRefImpl Sec) const override;
222 bool isSectionData(DataRefImpl Sec) const override;
223 bool isSectionBSS(DataRefImpl Sec) const override;
224 bool isSectionVirtual(DataRefImpl Sec) const override;
225 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
226 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
227 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
229 void moveRelocationNext(DataRefImpl &Rel) const override;
230 ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override;
231 uint64_t getRelocationOffset(DataRefImpl Rel) const override;
232 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
233 uint64_t getRelocationType(DataRefImpl Rel) const override;
234 void getRelocationTypeName(DataRefImpl Rel,
235 SmallVectorImpl<char> &Result) const override;
237 uint32_t getSectionType(DataRefImpl Sec) const override;
238 uint64_t getSectionFlags(DataRefImpl Sec) const override;
239 uint64_t getROffset(DataRefImpl Rel) const;
240 StringRef getRelocationTypeName(uint32_t Type) const;
242 /// \brief Get the relocation section that contains \a Rel.
243 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
244 return *EF.getSection(Rel.d.a);
247 const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
248 return reinterpret_cast<const Elf_Sym *>(Sym.p & ~uintptr_t(1));
251 DataRefImpl toDRI(const Elf_Sym *Sym, bool IsDynamic) const {
254 reinterpret_cast<uintptr_t>(Sym) | static_cast<uintptr_t>(IsDynamic);
258 const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
259 return reinterpret_cast<const Elf_Shdr *>(Sec.p);
262 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
264 DRI.p = reinterpret_cast<uintptr_t>(Sec);
268 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
269 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
270 reinterpret_cast<const char *>(Dyn.p));
273 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
275 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
279 bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
280 unsigned char Binding = ESym->getBinding();
281 unsigned char Visibility = ESym->getVisibility();
283 // A symbol is exported if its binding is either GLOBAL or WEAK, and its
284 // visibility is either DEFAULT or PROTECTED. All other symbols are not
286 if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
287 (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
293 // This flag is used for classof, to distinguish ELFObjectFile from
294 // its subclass. If more subclasses will be created, this flag will
295 // have to become an enum.
296 bool isDyldELFObject;
299 ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
301 const Elf_Rel *getRel(DataRefImpl Rel) const;
302 const Elf_Rela *getRela(DataRefImpl Rela) const;
304 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
306 basic_symbol_iterator symbol_begin_impl() const override;
307 basic_symbol_iterator symbol_end_impl() const override;
309 elf_symbol_iterator dynamic_symbol_begin() const;
310 elf_symbol_iterator dynamic_symbol_end() const;
312 section_iterator section_begin() const override;
313 section_iterator section_end() const override;
315 ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
317 uint8_t getBytesInAddress() const override;
318 StringRef getFileFormatName() const override;
319 unsigned getArch() const override;
320 StringRef getLoadName() const;
322 std::error_code getPlatformFlags(unsigned &Result) const override {
323 Result = EF.getHeader()->e_flags;
324 return std::error_code();
327 const ELFFile<ELFT> *getELFFile() const { return &EF; }
329 bool isDyldType() const { return isDyldELFObject; }
330 static inline bool classof(const Binary *v) {
331 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
335 elf_symbol_iterator_range getDynamicSymbolIterators() const override;
337 bool isRelocatableObject() const override;
340 typedef ELFObjectFile<ELFType<support::little, false>> ELF32LEObjectFile;
341 typedef ELFObjectFile<ELFType<support::little, true>> ELF64LEObjectFile;
342 typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
343 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
345 template <class ELFT>
346 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
347 const Elf_Sym *S = toELFSymIter(Sym);
348 Sym = toDRI(++S, Sym.p & 1);
351 template <class ELFT>
352 std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym,
353 StringRef &Result) const {
354 const Elf_Sym *ESym = toELFSymIter(Sym);
355 ErrorOr<StringRef> Name = EF.getSymbolName(ESym, Sym.p & 1);
357 return Name.getError();
359 return std::error_code();
362 template <class ELFT>
363 uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
364 return toELFShdrIter(Sec)->sh_flags;
367 template <class ELFT>
368 uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
369 return toELFShdrIter(Sec)->sh_type;
372 template <class ELFT>
373 uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
374 const Elf_Sym *ESym = getSymbol(Symb);
375 switch (ESym->st_shndx) {
376 case ELF::SHN_COMMON:
378 return UnknownAddress;
380 return ESym->st_value;
383 const Elf_Ehdr *Header = EF.getHeader();
384 uint64_t Ret = ESym->st_value;
386 // Clear the ARM/Thumb or microMIPS indicator flag.
387 if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
388 ESym->getType() == ELF::STT_FUNC)
394 template <class ELFT>
395 std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
396 uint64_t &Result) const {
397 Result = getSymbolValue(Symb);
398 const Elf_Sym *ESym = getSymbol(Symb);
399 switch (ESym->st_shndx) {
400 case ELF::SHN_COMMON:
403 return std::error_code();
406 const Elf_Ehdr *Header = EF.getHeader();
408 if (Header->e_type == ELF::ET_REL) {
409 ErrorOr<const Elf_Shdr *> SectionOrErr = EF.getSection(ESym);
410 if (std::error_code EC = SectionOrErr.getError())
412 const Elf_Shdr *Section = *SectionOrErr;
414 Result += Section->sh_addr;
417 return std::error_code();
420 template <class ELFT>
421 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
422 const Elf_Sym *Sym = toELFSymIter(Symb);
423 if (Sym->st_shndx == ELF::SHN_COMMON)
424 return Sym->st_value;
428 template <class ELFT>
429 uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
430 return toELFSymIter(Sym)->st_size;
433 template <class ELFT>
434 uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
435 return toELFSymIter(Symb)->st_size;
438 template <class ELFT>
439 uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
440 return toELFSymIter(Symb)->st_other;
443 template <class ELFT>
444 uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
445 return toELFSymIter(Symb)->getType();
448 template <class ELFT>
449 SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
450 const Elf_Sym *ESym = getSymbol(Symb);
452 switch (ESym->getType()) {
453 case ELF::STT_NOTYPE:
454 return SymbolRef::ST_Unknown;
455 case ELF::STT_SECTION:
456 return SymbolRef::ST_Debug;
458 return SymbolRef::ST_File;
460 return SymbolRef::ST_Function;
461 case ELF::STT_OBJECT:
462 case ELF::STT_COMMON:
464 return SymbolRef::ST_Data;
466 return SymbolRef::ST_Other;
470 template <class ELFT>
471 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
472 const Elf_Sym *ESym = toELFSymIter(Sym);
474 uint32_t Result = SymbolRef::SF_None;
476 if (ESym->getBinding() != ELF::STB_LOCAL)
477 Result |= SymbolRef::SF_Global;
479 if (ESym->getBinding() == ELF::STB_WEAK)
480 Result |= SymbolRef::SF_Weak;
482 if (ESym->st_shndx == ELF::SHN_ABS)
483 Result |= SymbolRef::SF_Absolute;
485 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
486 ESym == EF.symbol_begin() || ESym == EF.dynamic_symbol_begin())
487 Result |= SymbolRef::SF_FormatSpecific;
489 if (EF.getHeader()->e_machine == ELF::EM_ARM) {
490 ErrorOr<StringRef> NameOrErr = EF.getSymbolName(ESym, Sym.p & 1);
492 StringRef Name = *NameOrErr;
493 if (Name.startswith("$d") || Name.startswith("$t") ||
494 Name.startswith("$a"))
495 Result |= SymbolRef::SF_FormatSpecific;
499 if (ESym->st_shndx == ELF::SHN_UNDEF)
500 Result |= SymbolRef::SF_Undefined;
502 if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
503 Result |= SymbolRef::SF_Common;
505 if (isExportedToOtherDSO(ESym))
506 Result |= SymbolRef::SF_Exported;
508 if (ESym->getVisibility() == ELF::STV_HIDDEN)
509 Result |= SymbolRef::SF_Hidden;
514 template <class ELFT>
516 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
517 ErrorOr<const Elf_Shdr *> ESecOrErr = EF.getSection(ESym);
518 if (std::error_code EC = ESecOrErr.getError())
519 report_fatal_error(EC.message());
521 const Elf_Shdr *ESec = *ESecOrErr;
523 return section_end();
526 Sec.p = reinterpret_cast<intptr_t>(ESec);
527 return section_iterator(SectionRef(Sec, this));
530 template <class ELFT>
532 ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
533 section_iterator &Res) const {
534 Res = getSymbolSection(getSymbol(Symb));
535 return std::error_code();
538 template <class ELFT>
539 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
540 const Elf_Shdr *ESec = toELFShdrIter(Sec);
544 template <class ELFT>
545 std::error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
546 StringRef &Result) const {
547 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
549 return Name.getError();
551 return std::error_code();
554 template <class ELFT>
555 uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
556 return toELFShdrIter(Sec)->sh_addr;
559 template <class ELFT>
560 uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
561 return toELFShdrIter(Sec)->sh_size;
564 template <class ELFT>
566 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
567 StringRef &Result) const {
568 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
569 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
570 return std::error_code();
573 template <class ELFT>
574 uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
575 return toELFShdrIter(Sec)->sh_addralign;
578 template <class ELFT>
579 bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
580 return toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
583 template <class ELFT>
584 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
585 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
586 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
587 EShdr->sh_type == ELF::SHT_PROGBITS;
590 template <class ELFT>
591 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
592 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
593 return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
594 EShdr->sh_type == ELF::SHT_NOBITS;
597 template <class ELFT>
598 bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
599 return toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
602 template <class ELFT>
604 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
606 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
607 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
610 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
611 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
612 return relocation_iterator(RelocationRef(RelData, this));
614 const Elf_Shdr *RelSec = getRelSection(RelData);
615 ErrorOr<const Elf_Shdr *> SymSecOrErr = EF.getSection(RelSec->sh_link);
616 if (std::error_code EC = SymSecOrErr.getError())
617 report_fatal_error(EC.message());
618 const Elf_Shdr *SymSec = *SymSecOrErr;
619 uint32_t SymSecType = SymSec->sh_type;
620 if (SymSecType != ELF::SHT_SYMTAB && SymSecType != ELF::SHT_DYNSYM)
621 report_fatal_error("Invalid symbol table section type!");
622 if (SymSecType == ELF::SHT_DYNSYM)
625 return relocation_iterator(RelocationRef(RelData, this));
628 template <class ELFT>
630 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
631 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
632 relocation_iterator Begin = section_rel_begin(Sec);
633 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
635 DataRefImpl RelData = Begin->getRawDataRefImpl();
636 RelData.d.b += (S->sh_size / S->sh_entsize) << 1;
637 return relocation_iterator(RelocationRef(RelData, this));
640 template <class ELFT>
642 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
643 if (EF.getHeader()->e_type != ELF::ET_REL)
644 return section_end();
646 const Elf_Shdr *EShdr = toELFShdrIter(Sec);
647 uintX_t Type = EShdr->sh_type;
648 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
649 return section_end();
651 ErrorOr<const Elf_Shdr *> R = EF.getSection(EShdr->sh_info);
652 if (std::error_code EC = R.getError())
653 report_fatal_error(EC.message());
654 return section_iterator(SectionRef(toDRI(*R), this));
658 template <class ELFT>
659 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
663 template <class ELFT>
665 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
667 const Elf_Shdr *sec = getRelSection(Rel);
668 if (sec->sh_type == ELF::SHT_REL)
669 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
671 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
675 bool IsDyn = Rel.d.b & 1;
676 DataRefImpl SymbolData;
678 SymbolData = toDRI(EF.dynamic_symbol_begin() + symbolIdx, true);
680 SymbolData = toDRI(EF.symbol_begin() + symbolIdx, false);
681 return symbol_iterator(SymbolRef(SymbolData, this));
684 template <class ELFT>
686 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel) const {
687 uint64_t ROffset = getROffset(Rel);
688 const Elf_Ehdr *Header = EF.getHeader();
690 if (Header->e_type == ELF::ET_REL) {
691 const Elf_Shdr *RelocationSec = getRelSection(Rel);
692 ErrorOr<const Elf_Shdr *> RelocatedSec =
693 EF.getSection(RelocationSec->sh_info);
694 if (std::error_code EC = RelocatedSec.getError())
696 return ROffset + (*RelocatedSec)->sh_addr;
701 template <class ELFT>
702 uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
703 assert(EF.getHeader()->e_type == ELF::ET_REL &&
704 "Only relocatable object files have relocation offsets");
705 return getROffset(Rel);
708 template <class ELFT>
709 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
710 const Elf_Shdr *sec = getRelSection(Rel);
711 if (sec->sh_type == ELF::SHT_REL)
712 return getRel(Rel)->r_offset;
714 return getRela(Rel)->r_offset;
717 template <class ELFT>
718 uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
719 const Elf_Shdr *sec = getRelSection(Rel);
720 if (sec->sh_type == ELF::SHT_REL)
721 return getRel(Rel)->getType(EF.isMips64EL());
723 return getRela(Rel)->getType(EF.isMips64EL());
726 template <class ELFT>
727 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
728 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
731 template <class ELFT>
732 void ELFObjectFile<ELFT>::getRelocationTypeName(
733 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
734 uint32_t type = getRelocationType(Rel);
735 EF.getRelocationTypeName(type, Result);
738 template <class ELFT>
740 ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
741 if (getRelSection(Rel)->sh_type != ELF::SHT_RELA)
742 return object_error::parse_failed;
743 return (int64_t)getRela(Rel)->r_addend;
746 template <class ELFT>
747 const typename ELFFile<ELFT>::Elf_Sym *
748 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
749 return &*toELFSymIter(Symb);
752 template <class ELFT>
753 const typename ELFObjectFile<ELFT>::Elf_Rel *
754 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
755 assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
756 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b >> 1);
759 template <class ELFT>
760 const typename ELFObjectFile<ELFT>::Elf_Rela *
761 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
762 assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
763 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b >> 1);
766 template <class ELFT>
767 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
769 getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
773 EF(Data.getBuffer(), EC) {}
775 template <class ELFT>
776 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
777 DataRefImpl Sym = toDRI(EF.symbol_begin(), false);
778 return basic_symbol_iterator(SymbolRef(Sym, this));
781 template <class ELFT>
782 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
783 DataRefImpl Sym = toDRI(EF.symbol_end(), false);
784 return basic_symbol_iterator(SymbolRef(Sym, this));
787 template <class ELFT>
788 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
789 DataRefImpl Sym = toDRI(EF.dynamic_symbol_begin(), true);
790 return symbol_iterator(SymbolRef(Sym, this));
793 template <class ELFT>
794 elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
795 DataRefImpl Sym = toDRI(EF.dynamic_symbol_end(), true);
796 return symbol_iterator(SymbolRef(Sym, this));
799 template <class ELFT>
800 section_iterator ELFObjectFile<ELFT>::section_begin() const {
801 return section_iterator(SectionRef(toDRI(EF.section_begin()), this));
804 template <class ELFT>
805 section_iterator ELFObjectFile<ELFT>::section_end() const {
806 return section_iterator(SectionRef(toDRI(EF.section_end()), this));
809 template <class ELFT>
810 StringRef ELFObjectFile<ELFT>::getLoadName() const {
811 Elf_Dyn_Iter DI = EF.dynamic_table_begin();
812 Elf_Dyn_Iter DE = EF.dynamic_table_end();
814 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
818 return EF.getDynamicString(DI->getVal());
822 template <class ELFT>
823 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
824 return ELFT::Is64Bits ? 8 : 4;
827 template <class ELFT>
828 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
829 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
830 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
831 case ELF::ELFCLASS32:
832 switch (EF.getHeader()->e_machine) {
836 return "ELF32-x86-64";
838 return (IsLittleEndian ? "ELF32-arm-little" : "ELF32-arm-big");
839 case ELF::EM_HEXAGON:
840 return "ELF32-hexagon";
846 case ELF::EM_SPARC32PLUS:
847 return "ELF32-sparc";
849 return "ELF32-unknown";
851 case ELF::ELFCLASS64:
852 switch (EF.getHeader()->e_machine) {
856 return "ELF64-x86-64";
857 case ELF::EM_AARCH64:
858 return (IsLittleEndian ? "ELF64-aarch64-little" : "ELF64-aarch64-big");
860 return "ELF64-ppc64";
863 case ELF::EM_SPARCV9:
864 return "ELF64-sparc";
868 return "ELF64-unknown";
871 // FIXME: Proper error handling.
872 report_fatal_error("Invalid ELFCLASS!");
876 template <class ELFT>
877 unsigned ELFObjectFile<ELFT>::getArch() const {
878 bool IsLittleEndian = ELFT::TargetEndianness == support::little;
879 switch (EF.getHeader()->e_machine) {
883 return Triple::x86_64;
884 case ELF::EM_AARCH64:
885 return Triple::aarch64;
888 case ELF::EM_HEXAGON:
889 return Triple::hexagon;
891 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
892 case ELF::ELFCLASS32:
893 return IsLittleEndian ? Triple::mipsel : Triple::mips;
894 case ELF::ELFCLASS64:
895 return IsLittleEndian ? Triple::mips64el : Triple::mips64;
897 report_fatal_error("Invalid ELFCLASS!");
902 return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
904 return Triple::systemz;
907 case ELF::EM_SPARC32PLUS:
908 return IsLittleEndian ? Triple::sparcel : Triple::sparc;
909 case ELF::EM_SPARCV9:
910 return Triple::sparcv9;
913 return Triple::UnknownArch;
917 template <class ELFT>
918 ELFObjectFileBase::elf_symbol_iterator_range
919 ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
920 return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
923 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
924 return EF.getHeader()->e_type == ELF::ET_REL;