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_ELF_OBJECT_FILE_H
15 #define LLVM_OBJECT_ELF_OBJECT_FILE_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"
39 class ELFObjectFile : public ObjectFile {
41 LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
43 typedef typename ELFFile<ELFT>::uintX_t uintX_t;
45 typedef typename ELFFile<ELFT>::Elf_Sym Elf_Sym;
46 typedef typename ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
47 typedef typename ELFFile<ELFT>::Elf_Rel Elf_Rel;
48 typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela;
49 typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn;
51 typedef typename ELFFile<ELFT>::Elf_Sym_Iter Elf_Sym_Iter;
52 typedef typename ELFFile<ELFT>::Elf_Shdr_Iter Elf_Shdr_Iter;
53 typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
58 void moveSymbolNext(DataRefImpl &Symb) const LLVM_OVERRIDE;
59 error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const
61 error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const
63 error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const
65 error_code getSymbolAlignment(DataRefImpl Symb, uint32_t &Res) const
67 error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const LLVM_OVERRIDE;
68 uint32_t getSymbolFlags(DataRefImpl Symb) const LLVM_OVERRIDE;
69 error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const
71 error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const
73 error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
75 error_code getLibraryNext(DataRefImpl Data, LibraryRef &Result) const
77 error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const
80 void moveSectionNext(DataRefImpl &Sec) const LLVM_OVERRIDE;
81 error_code getSectionName(DataRefImpl Sec, StringRef &Res) const
83 error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const
85 error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const LLVM_OVERRIDE;
86 error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
87 error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const
89 error_code isSectionText(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
90 error_code isSectionData(DataRefImpl Sec, bool &Res) const;
91 error_code isSectionBSS(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
92 error_code isSectionRequiredForExecution(DataRefImpl Sec, bool &Res) const
94 error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
95 error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
96 error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const;
97 error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
98 bool &Result) const LLVM_OVERRIDE;
99 relocation_iterator section_rel_begin(DataRefImpl Sec) const;
100 relocation_iterator section_rel_end(DataRefImpl Sec) const LLVM_OVERRIDE;
101 section_iterator getRelocatedSection(DataRefImpl Sec) const LLVM_OVERRIDE;
103 void moveRelocationNext(DataRefImpl &Rel) const LLVM_OVERRIDE;
104 error_code getRelocationAddress(DataRefImpl Rel, uint64_t &Res) const
106 error_code getRelocationOffset(DataRefImpl Rel, uint64_t &Res) const
108 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const LLVM_OVERRIDE;
109 error_code getRelocationType(DataRefImpl Rel, uint64_t &Res) const;
110 error_code getRelocationTypeName(DataRefImpl Rel,
111 SmallVectorImpl<char> &Result) const
113 error_code getRelocationValueString(DataRefImpl Rel,
114 SmallVectorImpl<char> &Result) const
117 uint64_t getROffset(DataRefImpl Rel) const;
118 StringRef getRelocationTypeName(uint32_t Type) const;
120 /// \brief Get the relocation section that contains \a Rel.
121 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
122 return EF.getSection(Rel.d.a);
125 const Elf_Rel *getRel(DataRefImpl Rel) const;
126 const Elf_Rela *getRela(DataRefImpl Rela) const;
128 Elf_Sym_Iter toELFSymIter(DataRefImpl Symb) const {
129 bool IsDynamic = Symb.p & 1;
132 EF.begin_dynamic_symbols().getEntSize(),
133 reinterpret_cast<const char *>(Symb.p & ~uintptr_t(1)), IsDynamic);
134 return Elf_Sym_Iter(EF.begin_symbols().getEntSize(),
135 reinterpret_cast<const char *>(Symb.p), IsDynamic);
138 DataRefImpl toDRI(Elf_Sym_Iter Symb) const {
140 DRI.p = reinterpret_cast<uintptr_t>(Symb.get()) |
141 static_cast<uintptr_t>(Symb.isDynamic());
145 Elf_Shdr_Iter toELFShdrIter(DataRefImpl Sec) const {
146 return Elf_Shdr_Iter(EF.getHeader()->e_shentsize,
147 reinterpret_cast<const char *>(Sec.p));
150 DataRefImpl toDRI(Elf_Shdr_Iter Sec) const {
152 DRI.p = reinterpret_cast<uintptr_t>(Sec.get());
156 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
158 DRI.p = reinterpret_cast<uintptr_t>(Sec);
162 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
163 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
164 reinterpret_cast<const char *>(Dyn.p));
167 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
169 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
173 // This flag is used for classof, to distinguish ELFObjectFile from
174 // its subclass. If more subclasses will be created, this flag will
175 // have to become an enum.
176 bool isDyldELFObject;
179 ELFObjectFile(MemoryBuffer *Object, error_code &EC, bool BufferOwned = true);
181 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
183 symbol_iterator symbol_begin() const LLVM_OVERRIDE;
184 symbol_iterator symbol_end() const LLVM_OVERRIDE;
186 symbol_iterator dynamic_symbol_begin() const;
187 symbol_iterator dynamic_symbol_end() const;
189 section_iterator section_begin() const LLVM_OVERRIDE;
190 section_iterator section_end() const LLVM_OVERRIDE;
192 library_iterator needed_library_begin() const LLVM_OVERRIDE;
193 library_iterator needed_library_end() const LLVM_OVERRIDE;
195 error_code getRelocationAddend(DataRefImpl Rel, int64_t &Res) const;
196 error_code getSymbolVersion(SymbolRef Symb, StringRef &Version,
197 bool &IsDefault) const;
200 uint8_t getBytesInAddress() const LLVM_OVERRIDE;
201 StringRef getFileFormatName() const LLVM_OVERRIDE;
202 unsigned getArch() const LLVM_OVERRIDE;
203 StringRef getLoadName() const LLVM_OVERRIDE;
205 const ELFFile<ELFT> *getELFFile() const { return &EF; }
207 bool isDyldType() const { return isDyldELFObject; }
208 static inline bool classof(const Binary *v) {
209 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
214 // Use an alignment of 2 for the typedefs since that is the worst case for
215 // ELF files in archives.
216 typedef ELFObjectFile<ELFType<support::little, 2, false> > ELF32LEObjectFile;
217 typedef ELFObjectFile<ELFType<support::little, 2, true> > ELF64LEObjectFile;
218 typedef ELFObjectFile<ELFType<support::big, 2, false> > ELF32BEObjectFile;
219 typedef ELFObjectFile<ELFType<support::big, 2, true> > ELF64BEObjectFile;
221 template <class ELFT>
222 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Symb) const {
223 Symb = toDRI(++toELFSymIter(Symb));
226 template <class ELFT>
227 error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb,
228 StringRef &Result) const {
229 ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb));
231 return Name.getError();
233 return object_error::success;
236 template <class ELFT>
237 error_code ELFObjectFile<ELFT>::getSymbolVersion(SymbolRef SymRef,
239 bool &IsDefault) const {
240 DataRefImpl Symb = SymRef.getRawDataRefImpl();
241 const Elf_Sym *symb = getSymbol(Symb);
242 ErrorOr<StringRef> Ver =
243 EF.getSymbolVersion(EF.getSection(Symb.d.b), symb, IsDefault);
245 return Ver.getError();
247 return object_error::success;
250 template <class ELFT>
251 error_code ELFObjectFile<ELFT>::getSymbolFileOffset(DataRefImpl Symb,
252 uint64_t &Result) const {
253 const Elf_Sym *ESym = getSymbol(Symb);
254 const Elf_Shdr *ESec;
255 switch (EF.getSymbolTableIndex(ESym)) {
256 case ELF::SHN_COMMON:
257 // Unintialized symbols have no offset in the object file
259 Result = UnknownAddressOrSize;
260 return object_error::success;
262 Result = ESym->st_value;
263 return object_error::success;
265 ESec = EF.getSection(ESym);
268 switch (ESym->getType()) {
269 case ELF::STT_SECTION:
270 Result = ESec ? ESec->sh_offset : UnknownAddressOrSize;
271 return object_error::success;
273 case ELF::STT_OBJECT:
274 case ELF::STT_NOTYPE:
275 Result = ESym->st_value + (ESec ? ESec->sh_offset : 0);
276 return object_error::success;
278 Result = UnknownAddressOrSize;
279 return object_error::success;
283 template <class ELFT>
284 error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
285 uint64_t &Result) const {
286 const Elf_Sym *ESym = getSymbol(Symb);
287 const Elf_Shdr *ESec;
288 switch (EF.getSymbolTableIndex(ESym)) {
289 case ELF::SHN_COMMON:
291 Result = UnknownAddressOrSize;
292 return object_error::success;
294 Result = ESym->st_value;
295 return object_error::success;
297 ESec = EF.getSection(ESym);
300 switch (ESym->getType()) {
301 case ELF::STT_SECTION:
302 Result = ESec ? ESec->sh_addr : UnknownAddressOrSize;
303 return object_error::success;
305 case ELF::STT_OBJECT:
306 case ELF::STT_NOTYPE:
309 switch (EF.getHeader()->e_type) {
312 IsRelocatable = false;
315 IsRelocatable = true;
317 Result = ESym->st_value;
319 // Clear the ARM/Thumb indicator flag.
320 if (EF.getHeader()->e_machine == ELF::EM_ARM)
323 if (IsRelocatable && ESec != 0)
324 Result += ESec->sh_addr;
325 return object_error::success;
327 Result = UnknownAddressOrSize;
328 return object_error::success;
332 template <class ELFT>
333 error_code ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb,
334 uint32_t &Res) const {
335 Elf_Sym_Iter Sym = toELFSymIter(Symb);
336 if (Sym->st_shndx == ELF::SHN_COMMON)
340 return object_error::success;
343 template <class ELFT>
344 error_code ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Symb,
345 uint64_t &Result) const {
346 Result = toELFSymIter(Symb)->st_size;
347 return object_error::success;
350 template <class ELFT>
351 error_code ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb,
352 SymbolRef::Type &Result) const {
353 const Elf_Sym *ESym = getSymbol(Symb);
355 switch (ESym->getType()) {
356 case ELF::STT_NOTYPE:
357 Result = SymbolRef::ST_Unknown;
359 case ELF::STT_SECTION:
360 Result = SymbolRef::ST_Debug;
363 Result = SymbolRef::ST_File;
366 Result = SymbolRef::ST_Function;
368 case ELF::STT_OBJECT:
369 case ELF::STT_COMMON:
371 Result = SymbolRef::ST_Data;
374 Result = SymbolRef::ST_Other;
377 return object_error::success;
380 template <class ELFT>
381 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
382 Elf_Sym_Iter EIter = toELFSymIter(Symb);
383 const Elf_Sym *ESym = &*EIter;
385 uint32_t Result = SymbolRef::SF_None;
387 if (ESym->getBinding() != ELF::STB_LOCAL)
388 Result |= SymbolRef::SF_Global;
390 if (ESym->getBinding() == ELF::STB_WEAK)
391 Result |= SymbolRef::SF_Weak;
393 if (ESym->st_shndx == ELF::SHN_ABS)
394 Result |= SymbolRef::SF_Absolute;
396 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
397 EIter == EF.begin_symbols() || EIter == EF.begin_dynamic_symbols())
398 Result |= SymbolRef::SF_FormatSpecific;
400 if (EF.getSymbolTableIndex(ESym) == ELF::SHN_UNDEF)
401 Result |= SymbolRef::SF_Undefined;
403 if (ESym->getType() == ELF::STT_COMMON ||
404 EF.getSymbolTableIndex(ESym) == ELF::SHN_COMMON)
405 Result |= SymbolRef::SF_Common;
410 template <class ELFT>
411 error_code ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
412 section_iterator &Res) const {
413 const Elf_Sym *ESym = getSymbol(Symb);
414 const Elf_Shdr *ESec = EF.getSection(ESym);
419 Sec.p = reinterpret_cast<intptr_t>(ESec);
420 Res = section_iterator(SectionRef(Sec, this));
422 return object_error::success;
425 template <class ELFT>
426 error_code ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb,
427 uint64_t &Val) const {
428 const Elf_Sym *ESym = getSymbol(Symb);
429 Val = ESym->st_value;
430 return object_error::success;
433 template <class ELFT>
434 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
435 Sec = toDRI(++toELFShdrIter(Sec));
438 template <class ELFT>
439 error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
440 StringRef &Result) const {
441 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
443 return Name.getError();
445 return object_error::success;
448 template <class ELFT>
449 error_code ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec,
450 uint64_t &Result) const {
451 Result = toELFShdrIter(Sec)->sh_addr;
452 return object_error::success;
455 template <class ELFT>
456 error_code ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec,
457 uint64_t &Result) const {
458 Result = toELFShdrIter(Sec)->sh_size;
459 return object_error::success;
462 template <class ELFT>
463 error_code ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
464 StringRef &Result) const {
465 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
466 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
467 return object_error::success;
470 template <class ELFT>
471 error_code ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec,
472 uint64_t &Result) const {
473 Result = toELFShdrIter(Sec)->sh_addralign;
474 return object_error::success;
477 template <class ELFT>
478 error_code ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec,
479 bool &Result) const {
480 Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
481 return object_error::success;
484 template <class ELFT>
485 error_code ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec,
486 bool &Result) const {
487 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
488 Result = EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
489 EShdr->sh_type == ELF::SHT_PROGBITS;
490 return object_error::success;
493 template <class ELFT>
494 error_code ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec,
495 bool &Result) const {
496 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
497 Result = EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
498 EShdr->sh_type == ELF::SHT_NOBITS;
499 return object_error::success;
502 template <class ELFT>
504 ELFObjectFile<ELFT>::isSectionRequiredForExecution(DataRefImpl Sec,
505 bool &Result) const {
506 Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_ALLOC;
507 return object_error::success;
510 template <class ELFT>
511 error_code ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec,
512 bool &Result) const {
513 Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
514 return object_error::success;
517 template <class ELFT>
518 error_code ELFObjectFile<ELFT>::isSectionZeroInit(DataRefImpl Sec,
519 bool &Result) const {
520 Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
521 return object_error::success;
524 template <class ELFT>
525 error_code ELFObjectFile<ELFT>::isSectionReadOnlyData(DataRefImpl Sec,
526 bool &Result) const {
527 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
528 Result = !(EShdr->sh_flags & (ELF::SHF_WRITE | ELF::SHF_EXECINSTR));
529 return object_error::success;
532 template <class ELFT>
533 error_code ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
535 bool &Result) const {
536 Elf_Sym_Iter ESym = toELFSymIter(Symb);
538 uintX_t Index = ESym->st_shndx;
539 bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
541 Result = !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
542 return object_error::success;
545 template <class ELFT>
547 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
549 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
550 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
552 return relocation_iterator(RelocationRef(RelData, this));
555 template <class ELFT>
557 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
559 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
560 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
561 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
562 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
565 RelData.d.b = S->sh_size / S->sh_entsize;
567 return relocation_iterator(RelocationRef(RelData, this));
570 template <class ELFT>
572 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
573 if (EF.getHeader()->e_type != ELF::ET_REL)
574 return section_end();
576 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
577 uintX_t Type = EShdr->sh_type;
578 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
579 return section_end();
581 const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
582 return section_iterator(SectionRef(toDRI(R), this));
586 template <class ELFT>
587 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
591 template <class ELFT>
593 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
595 const Elf_Shdr *sec = getRelSection(Rel);
596 switch (sec->sh_type) {
598 report_fatal_error("Invalid section type in Rel!");
600 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
603 case ELF::SHT_RELA: {
604 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
611 const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
613 DataRefImpl SymbolData;
614 switch (SymSec->sh_type) {
616 report_fatal_error("Invalid symbol table section type!");
617 case ELF::SHT_SYMTAB:
618 SymbolData = toDRI(EF.begin_symbols() + symbolIdx);
620 case ELF::SHT_DYNSYM:
621 SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx);
625 return symbol_iterator(SymbolRef(SymbolData, this));
628 template <class ELFT>
629 error_code ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
630 uint64_t &Result) const {
631 Result = getROffset(Rel);
632 return object_error::success;
635 template <class ELFT>
636 error_code ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel,
637 uint64_t &Result) const {
638 Result = getROffset(Rel);
639 return object_error::success;
642 template <class ELFT>
643 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
644 const Elf_Shdr *sec = getRelSection(Rel);
645 switch (sec->sh_type) {
647 report_fatal_error("Invalid section type in Rel!");
649 return getRel(Rel)->r_offset;
651 return getRela(Rel)->r_offset;
655 template <class ELFT>
656 error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel,
657 uint64_t &Result) const {
658 const Elf_Shdr *sec = getRelSection(Rel);
659 switch (sec->sh_type) {
661 report_fatal_error("Invalid section type in Rel!");
663 Result = getRel(Rel)->getType(EF.isMips64EL());
666 case ELF::SHT_RELA: {
667 Result = getRela(Rel)->getType(EF.isMips64EL());
671 return object_error::success;
674 template <class ELFT>
675 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
676 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
679 template <class ELFT>
680 error_code ELFObjectFile<ELFT>::getRelocationTypeName(
681 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
682 const Elf_Shdr *sec = getRelSection(Rel);
684 switch (sec->sh_type) {
686 return object_error::parse_failed;
688 type = getRel(Rel)->getType(EF.isMips64EL());
691 case ELF::SHT_RELA: {
692 type = getRela(Rel)->getType(EF.isMips64EL());
697 EF.getRelocationTypeName(type, Result);
698 return object_error::success;
701 template <class ELFT>
702 error_code ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel,
703 int64_t &Result) const {
704 const Elf_Shdr *sec = getRelSection(Rel);
705 switch (sec->sh_type) {
707 report_fatal_error("Invalid section type in Rel!");
710 return object_error::success;
712 case ELF::SHT_RELA: {
713 Result = getRela(Rel)->r_addend;
714 return object_error::success;
719 template <class ELFT>
720 error_code ELFObjectFile<ELFT>::getRelocationValueString(
721 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
722 const Elf_Shdr *sec = getRelSection(Rel);
726 uint16_t symbol_index = 0;
727 switch (sec->sh_type) {
729 return object_error::parse_failed;
731 type = getRel(Rel)->getType(EF.isMips64EL());
732 symbol_index = getRel(Rel)->getSymbol(EF.isMips64EL());
733 // TODO: Read implicit addend from section data.
736 case ELF::SHT_RELA: {
737 type = getRela(Rel)->getType(EF.isMips64EL());
738 symbol_index = getRela(Rel)->getSymbol(EF.isMips64EL());
739 addend = getRela(Rel)->r_addend;
743 const Elf_Sym *symb =
744 EF.template getEntry<Elf_Sym>(sec->sh_link, symbol_index);
745 ErrorOr<StringRef> SymName =
746 EF.getSymbolName(EF.getSection(sec->sh_link), symb);
748 return SymName.getError();
749 switch (EF.getHeader()->e_machine) {
752 case ELF::R_X86_64_PC8:
753 case ELF::R_X86_64_PC16:
754 case ELF::R_X86_64_PC32: {
756 raw_string_ostream fmt(fmtbuf);
757 fmt << *SymName << (addend < 0 ? "" : "+") << addend << "-P";
759 Result.append(fmtbuf.begin(), fmtbuf.end());
761 case ELF::R_X86_64_8:
762 case ELF::R_X86_64_16:
763 case ELF::R_X86_64_32:
764 case ELF::R_X86_64_32S:
765 case ELF::R_X86_64_64: {
767 raw_string_ostream fmt(fmtbuf);
768 fmt << *SymName << (addend < 0 ? "" : "+") << addend;
770 Result.append(fmtbuf.begin(), fmtbuf.end());
776 case ELF::EM_AARCH64: {
778 raw_string_ostream fmt(fmtbuf);
781 fmt << (addend < 0 ? "" : "+") << addend;
783 Result.append(fmtbuf.begin(), fmtbuf.end());
787 case ELF::EM_HEXAGON:
795 Result.append(res.begin(), res.end());
796 return object_error::success;
799 template <class ELFT>
800 const typename ELFFile<ELFT>::Elf_Sym *
801 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
802 return &*toELFSymIter(Symb);
805 template <class ELFT>
806 const typename ELFObjectFile<ELFT>::Elf_Rel *
807 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
808 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
811 template <class ELFT>
812 const typename ELFObjectFile<ELFT>::Elf_Rela *
813 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
814 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
817 template <class ELFT>
818 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBuffer *Object, error_code &ec,
820 : ObjectFile(getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
823 Object, BufferOwned),
826 template <class ELFT>
827 symbol_iterator ELFObjectFile<ELFT>::symbol_begin() const {
828 return symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this));
831 template <class ELFT>
832 symbol_iterator ELFObjectFile<ELFT>::symbol_end() const {
833 return symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this));
836 template <class ELFT>
837 symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
838 return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this));
841 template <class ELFT>
842 symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
843 return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this));
846 template <class ELFT>
847 section_iterator ELFObjectFile<ELFT>::section_begin() const {
848 return section_iterator(SectionRef(toDRI(EF.begin_sections()), this));
851 template <class ELFT>
852 section_iterator ELFObjectFile<ELFT>::section_end() const {
853 return section_iterator(SectionRef(toDRI(EF.end_sections()), this));
856 template <class ELFT>
857 StringRef ELFObjectFile<ELFT>::getLoadName() const {
858 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
859 Elf_Dyn_Iter DE = EF.end_dynamic_table();
861 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
865 return EF.getDynamicString(DI->getVal());
869 template <class ELFT>
870 library_iterator ELFObjectFile<ELFT>::needed_library_begin() const {
871 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
872 Elf_Dyn_Iter DE = EF.end_dynamic_table();
874 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
877 return library_iterator(LibraryRef(toDRI(DI), this));
880 template <class ELFT>
881 error_code ELFObjectFile<ELFT>::getLibraryNext(DataRefImpl Data,
882 LibraryRef &Result) const {
883 Elf_Dyn_Iter DI = toELFDynIter(Data);
884 Elf_Dyn_Iter DE = EF.end_dynamic_table();
886 // Skip to the next DT_NEEDED entry.
889 while (DI != DE && DI->getTag() != ELF::DT_NEEDED);
891 Result = LibraryRef(toDRI(DI), this);
892 return object_error::success;
895 template <class ELFT>
896 error_code ELFObjectFile<ELFT>::getLibraryPath(DataRefImpl Data,
897 StringRef &Res) const {
898 Res = EF.getDynamicString(toELFDynIter(Data)->getVal());
899 return object_error::success;
902 template <class ELFT>
903 library_iterator ELFObjectFile<ELFT>::needed_library_end() const {
904 return library_iterator(LibraryRef(toDRI(EF.end_dynamic_table()), this));
907 template <class ELFT>
908 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
909 return ELFT::Is64Bits ? 8 : 4;
912 template <class ELFT>
913 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
914 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
915 case ELF::ELFCLASS32:
916 switch (EF.getHeader()->e_machine) {
920 return "ELF32-x86-64";
923 case ELF::EM_HEXAGON:
924 return "ELF32-hexagon";
930 case ELF::EM_SPARC32PLUS:
931 return "ELF32-sparc";
933 return "ELF32-unknown";
935 case ELF::ELFCLASS64:
936 switch (EF.getHeader()->e_machine) {
940 return "ELF64-x86-64";
941 case ELF::EM_AARCH64:
942 return "ELF64-aarch64";
944 return "ELF64-ppc64";
947 case ELF::EM_SPARCV9:
948 return "ELF64-sparc";
952 return "ELF64-unknown";
955 // FIXME: Proper error handling.
956 report_fatal_error("Invalid ELFCLASS!");
960 template <class ELFT>
961 unsigned ELFObjectFile<ELFT>::getArch() const {
962 switch (EF.getHeader()->e_machine) {
966 return Triple::x86_64;
967 case ELF::EM_AARCH64:
968 return Triple::aarch64;
971 case ELF::EM_HEXAGON:
972 return Triple::hexagon;
974 return (ELFT::TargetEndianness == support::little) ? Triple::mipsel
977 return (ELFT::TargetEndianness == support::little) ? Triple::ppc64le
980 return Triple::systemz;
983 case ELF::EM_SPARC32PLUS:
984 return Triple::sparc;
985 case ELF::EM_SPARCV9:
986 return Triple::sparcv9;
989 return Triple::UnknownArch;
993 /// FIXME: Maybe we should have a base ElfObjectFile that is not a template
994 /// and make these member functions?
995 static inline error_code getELFRelocationAddend(const RelocationRef R,
997 const ObjectFile *Obj = R.getObjectFile();
998 DataRefImpl DRI = R.getRawDataRefImpl();
999 // Little-endian 32-bit
1000 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
1001 return ELFObj->getRelocationAddend(DRI, Addend);
1003 // Big-endian 32-bit
1004 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
1005 return ELFObj->getRelocationAddend(DRI, Addend);
1007 // Little-endian 64-bit
1008 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
1009 return ELFObj->getRelocationAddend(DRI, Addend);
1011 // Big-endian 64-bit
1012 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
1013 return ELFObj->getRelocationAddend(DRI, Addend);
1015 llvm_unreachable("Object passed to getELFRelocationAddend() is not ELF");
1018 /// This is a generic interface for retrieving GNU symbol version
1019 /// information from an ELFObjectFile.
1020 static inline error_code GetELFSymbolVersion(const ObjectFile *Obj,
1021 const SymbolRef &Sym,
1024 // Little-endian 32-bit
1025 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
1026 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1028 // Big-endian 32-bit
1029 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
1030 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1032 // Little-endian 64-bit
1033 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
1034 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1036 // Big-endian 64-bit
1037 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
1038 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1040 llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");