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 begin_symbols() const LLVM_OVERRIDE;
184 symbol_iterator end_symbols() const LLVM_OVERRIDE;
186 symbol_iterator begin_dynamic_symbols() const;
187 symbol_iterator end_dynamic_symbols() const;
189 section_iterator begin_sections() const LLVM_OVERRIDE;
190 section_iterator end_sections() const LLVM_OVERRIDE;
192 library_iterator begin_libraries_needed() const LLVM_OVERRIDE;
193 library_iterator end_libraries_needed() 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;
407 if (ESym->getType() == ELF::STT_TLS)
408 Result |= SymbolRef::SF_ThreadLocal;
413 template <class ELFT>
414 error_code ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
415 section_iterator &Res) const {
416 const Elf_Sym *ESym = getSymbol(Symb);
417 const Elf_Shdr *ESec = EF.getSection(ESym);
419 Res = end_sections();
422 Sec.p = reinterpret_cast<intptr_t>(ESec);
423 Res = section_iterator(SectionRef(Sec, this));
425 return object_error::success;
428 template <class ELFT>
429 error_code ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb,
430 uint64_t &Val) const {
431 const Elf_Sym *ESym = getSymbol(Symb);
432 Val = ESym->st_value;
433 return object_error::success;
436 template <class ELFT>
437 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
438 Sec = toDRI(++toELFShdrIter(Sec));
441 template <class ELFT>
442 error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
443 StringRef &Result) const {
444 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
446 return Name.getError();
448 return object_error::success;
451 template <class ELFT>
452 error_code ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec,
453 uint64_t &Result) const {
454 Result = toELFShdrIter(Sec)->sh_addr;
455 return object_error::success;
458 template <class ELFT>
459 error_code ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec,
460 uint64_t &Result) const {
461 Result = toELFShdrIter(Sec)->sh_size;
462 return object_error::success;
465 template <class ELFT>
466 error_code ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
467 StringRef &Result) const {
468 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
469 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
470 return object_error::success;
473 template <class ELFT>
474 error_code ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec,
475 uint64_t &Result) const {
476 Result = toELFShdrIter(Sec)->sh_addralign;
477 return object_error::success;
480 template <class ELFT>
481 error_code ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec,
482 bool &Result) const {
483 Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
484 return object_error::success;
487 template <class ELFT>
488 error_code ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec,
489 bool &Result) const {
490 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
491 Result = EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
492 EShdr->sh_type == ELF::SHT_PROGBITS;
493 return object_error::success;
496 template <class ELFT>
497 error_code ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec,
498 bool &Result) const {
499 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
500 Result = EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
501 EShdr->sh_type == ELF::SHT_NOBITS;
502 return object_error::success;
505 template <class ELFT>
507 ELFObjectFile<ELFT>::isSectionRequiredForExecution(DataRefImpl Sec,
508 bool &Result) const {
509 Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_ALLOC;
510 return object_error::success;
513 template <class ELFT>
514 error_code ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec,
515 bool &Result) const {
516 Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
517 return object_error::success;
520 template <class ELFT>
521 error_code ELFObjectFile<ELFT>::isSectionZeroInit(DataRefImpl Sec,
522 bool &Result) const {
523 Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
524 return object_error::success;
527 template <class ELFT>
528 error_code ELFObjectFile<ELFT>::isSectionReadOnlyData(DataRefImpl Sec,
529 bool &Result) const {
530 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
531 Result = !(EShdr->sh_flags & (ELF::SHF_WRITE | ELF::SHF_EXECINSTR));
532 return object_error::success;
535 template <class ELFT>
536 error_code ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
538 bool &Result) const {
539 Elf_Sym_Iter ESym = toELFSymIter(Symb);
541 uintX_t Index = ESym->st_shndx;
542 bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
544 Result = !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
545 return object_error::success;
548 template <class ELFT>
550 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
552 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
553 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
555 return relocation_iterator(RelocationRef(RelData, this));
558 template <class ELFT>
560 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
562 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
563 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
564 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
565 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
568 RelData.d.b = S->sh_size / S->sh_entsize;
570 return relocation_iterator(RelocationRef(RelData, this));
573 template <class ELFT>
575 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
576 if (EF.getHeader()->e_type != ELF::ET_REL)
577 return end_sections();
579 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
580 uintX_t Type = EShdr->sh_type;
581 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
582 return end_sections();
584 const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
585 return section_iterator(SectionRef(toDRI(R), this));
589 template <class ELFT>
590 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
594 template <class ELFT>
596 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
598 const Elf_Shdr *sec = getRelSection(Rel);
599 switch (sec->sh_type) {
601 report_fatal_error("Invalid section type in Rel!");
603 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
606 case ELF::SHT_RELA: {
607 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
612 return end_symbols();
614 const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
616 DataRefImpl SymbolData;
617 switch (SymSec->sh_type) {
619 report_fatal_error("Invalid symbol table section type!");
620 case ELF::SHT_SYMTAB:
621 SymbolData = toDRI(EF.begin_symbols() + symbolIdx);
623 case ELF::SHT_DYNSYM:
624 SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx);
628 return symbol_iterator(SymbolRef(SymbolData, this));
631 template <class ELFT>
632 error_code ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
633 uint64_t &Result) const {
634 Result = getROffset(Rel);
635 return object_error::success;
638 template <class ELFT>
639 error_code ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel,
640 uint64_t &Result) const {
641 Result = getROffset(Rel);
642 return object_error::success;
645 template <class ELFT>
646 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
647 const Elf_Shdr *sec = getRelSection(Rel);
648 switch (sec->sh_type) {
650 report_fatal_error("Invalid section type in Rel!");
652 return getRel(Rel)->r_offset;
654 return getRela(Rel)->r_offset;
658 template <class ELFT>
659 error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel,
660 uint64_t &Result) const {
661 const Elf_Shdr *sec = getRelSection(Rel);
662 switch (sec->sh_type) {
664 report_fatal_error("Invalid section type in Rel!");
666 Result = getRel(Rel)->getType(EF.isMips64EL());
669 case ELF::SHT_RELA: {
670 Result = getRela(Rel)->getType(EF.isMips64EL());
674 return object_error::success;
677 template <class ELFT>
678 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
679 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
682 template <class ELFT>
683 error_code ELFObjectFile<ELFT>::getRelocationTypeName(
684 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
685 const Elf_Shdr *sec = getRelSection(Rel);
687 switch (sec->sh_type) {
689 return object_error::parse_failed;
691 type = getRel(Rel)->getType(EF.isMips64EL());
694 case ELF::SHT_RELA: {
695 type = getRela(Rel)->getType(EF.isMips64EL());
700 EF.getRelocationTypeName(type, Result);
701 return object_error::success;
704 template <class ELFT>
705 error_code ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel,
706 int64_t &Result) const {
707 const Elf_Shdr *sec = getRelSection(Rel);
708 switch (sec->sh_type) {
710 report_fatal_error("Invalid section type in Rel!");
713 return object_error::success;
715 case ELF::SHT_RELA: {
716 Result = getRela(Rel)->r_addend;
717 return object_error::success;
722 template <class ELFT>
723 error_code ELFObjectFile<ELFT>::getRelocationValueString(
724 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
725 const Elf_Shdr *sec = getRelSection(Rel);
729 uint16_t symbol_index = 0;
730 switch (sec->sh_type) {
732 return object_error::parse_failed;
734 type = getRel(Rel)->getType(EF.isMips64EL());
735 symbol_index = getRel(Rel)->getSymbol(EF.isMips64EL());
736 // TODO: Read implicit addend from section data.
739 case ELF::SHT_RELA: {
740 type = getRela(Rel)->getType(EF.isMips64EL());
741 symbol_index = getRela(Rel)->getSymbol(EF.isMips64EL());
742 addend = getRela(Rel)->r_addend;
746 const Elf_Sym *symb =
747 EF.template getEntry<Elf_Sym>(sec->sh_link, symbol_index);
748 ErrorOr<StringRef> SymName =
749 EF.getSymbolName(EF.getSection(sec->sh_link), symb);
751 return SymName.getError();
752 switch (EF.getHeader()->e_machine) {
755 case ELF::R_X86_64_PC8:
756 case ELF::R_X86_64_PC16:
757 case ELF::R_X86_64_PC32: {
759 raw_string_ostream fmt(fmtbuf);
760 fmt << *SymName << (addend < 0 ? "" : "+") << addend << "-P";
762 Result.append(fmtbuf.begin(), fmtbuf.end());
764 case ELF::R_X86_64_8:
765 case ELF::R_X86_64_16:
766 case ELF::R_X86_64_32:
767 case ELF::R_X86_64_32S:
768 case ELF::R_X86_64_64: {
770 raw_string_ostream fmt(fmtbuf);
771 fmt << *SymName << (addend < 0 ? "" : "+") << addend;
773 Result.append(fmtbuf.begin(), fmtbuf.end());
779 case ELF::EM_AARCH64: {
781 raw_string_ostream fmt(fmtbuf);
784 fmt << (addend < 0 ? "" : "+") << addend;
786 Result.append(fmtbuf.begin(), fmtbuf.end());
790 case ELF::EM_HEXAGON:
798 Result.append(res.begin(), res.end());
799 return object_error::success;
802 template <class ELFT>
803 const typename ELFFile<ELFT>::Elf_Sym *
804 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
805 return &*toELFSymIter(Symb);
808 template <class ELFT>
809 const typename ELFObjectFile<ELFT>::Elf_Rel *
810 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
811 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
814 template <class ELFT>
815 const typename ELFObjectFile<ELFT>::Elf_Rela *
816 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
817 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
820 template <class ELFT>
821 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBuffer *Object, error_code &ec,
823 : ObjectFile(getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
826 Object, BufferOwned),
829 template <class ELFT>
830 symbol_iterator ELFObjectFile<ELFT>::begin_symbols() const {
831 return symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this));
834 template <class ELFT>
835 symbol_iterator ELFObjectFile<ELFT>::end_symbols() const {
836 return symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this));
839 template <class ELFT>
840 symbol_iterator ELFObjectFile<ELFT>::begin_dynamic_symbols() const {
841 return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this));
844 template <class ELFT>
845 symbol_iterator ELFObjectFile<ELFT>::end_dynamic_symbols() const {
846 return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this));
849 template <class ELFT>
850 section_iterator ELFObjectFile<ELFT>::begin_sections() const {
851 return section_iterator(SectionRef(toDRI(EF.begin_sections()), this));
854 template <class ELFT>
855 section_iterator ELFObjectFile<ELFT>::end_sections() const {
856 return section_iterator(SectionRef(toDRI(EF.end_sections()), this));
859 template <class ELFT>
860 StringRef ELFObjectFile<ELFT>::getLoadName() const {
861 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
862 Elf_Dyn_Iter DE = EF.end_dynamic_table();
864 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
868 return EF.getDynamicString(DI->getVal());
872 template <class ELFT>
873 library_iterator ELFObjectFile<ELFT>::begin_libraries_needed() const {
874 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
875 Elf_Dyn_Iter DE = EF.end_dynamic_table();
877 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
880 return library_iterator(LibraryRef(toDRI(DI), this));
883 template <class ELFT>
884 error_code ELFObjectFile<ELFT>::getLibraryNext(DataRefImpl Data,
885 LibraryRef &Result) const {
886 Elf_Dyn_Iter DI = toELFDynIter(Data);
887 Elf_Dyn_Iter DE = EF.end_dynamic_table();
889 // Skip to the next DT_NEEDED entry.
892 while (DI != DE && DI->getTag() != ELF::DT_NEEDED);
894 Result = LibraryRef(toDRI(DI), this);
895 return object_error::success;
898 template <class ELFT>
899 error_code ELFObjectFile<ELFT>::getLibraryPath(DataRefImpl Data,
900 StringRef &Res) const {
901 Res = EF.getDynamicString(toELFDynIter(Data)->getVal());
902 return object_error::success;
905 template <class ELFT>
906 library_iterator ELFObjectFile<ELFT>::end_libraries_needed() const {
907 return library_iterator(LibraryRef(toDRI(EF.end_dynamic_table()), this));
910 template <class ELFT>
911 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
912 return ELFT::Is64Bits ? 8 : 4;
915 template <class ELFT>
916 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
917 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
918 case ELF::ELFCLASS32:
919 switch (EF.getHeader()->e_machine) {
923 return "ELF32-x86-64";
926 case ELF::EM_HEXAGON:
927 return "ELF32-hexagon";
933 case ELF::EM_SPARC32PLUS:
934 return "ELF32-sparc";
936 return "ELF32-unknown";
938 case ELF::ELFCLASS64:
939 switch (EF.getHeader()->e_machine) {
943 return "ELF64-x86-64";
944 case ELF::EM_AARCH64:
945 return "ELF64-aarch64";
947 return "ELF64-ppc64";
950 case ELF::EM_SPARCV9:
951 return "ELF64-sparc";
953 return "ELF64-unknown";
956 // FIXME: Proper error handling.
957 report_fatal_error("Invalid ELFCLASS!");
961 template <class ELFT>
962 unsigned ELFObjectFile<ELFT>::getArch() const {
963 switch (EF.getHeader()->e_machine) {
967 return Triple::x86_64;
968 case ELF::EM_AARCH64:
969 return Triple::aarch64;
972 case ELF::EM_HEXAGON:
973 return Triple::hexagon;
975 return (ELFT::TargetEndianness == support::little) ? Triple::mipsel
978 return (ELFT::TargetEndianness == support::little) ? Triple::ppc64le
981 return Triple::systemz;
984 case ELF::EM_SPARC32PLUS:
985 return Triple::sparc;
986 case ELF::EM_SPARCV9:
987 return Triple::sparcv9;
990 return Triple::UnknownArch;
994 /// FIXME: Maybe we should have a base ElfObjectFile that is not a template
995 /// and make these member functions?
996 static inline error_code getELFRelocationAddend(const RelocationRef R,
998 const ObjectFile *Obj = R.getObjectFile();
999 DataRefImpl DRI = R.getRawDataRefImpl();
1000 // Little-endian 32-bit
1001 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
1002 return ELFObj->getRelocationAddend(DRI, Addend);
1004 // Big-endian 32-bit
1005 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
1006 return ELFObj->getRelocationAddend(DRI, Addend);
1008 // Little-endian 64-bit
1009 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
1010 return ELFObj->getRelocationAddend(DRI, Addend);
1012 // Big-endian 64-bit
1013 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
1014 return ELFObj->getRelocationAddend(DRI, Addend);
1016 llvm_unreachable("Object passed to getELFRelocationAddend() is not ELF");
1019 /// This is a generic interface for retrieving GNU symbol version
1020 /// information from an ELFObjectFile.
1021 static inline error_code GetELFSymbolVersion(const ObjectFile *Obj,
1022 const SymbolRef &Sym,
1025 // Little-endian 32-bit
1026 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
1027 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1029 // Big-endian 32-bit
1030 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
1031 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1033 // Little-endian 64-bit
1034 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
1035 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1037 // Big-endian 64-bit
1038 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
1039 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1041 llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");