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 override;
59 error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const override;
60 error_code getSymbolFileOffset(DataRefImpl Symb,
61 uint64_t &Res) const override;
62 error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const override;
63 error_code getSymbolAlignment(DataRefImpl Symb, uint32_t &Res) const override;
64 error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const override;
65 uint32_t getSymbolFlags(DataRefImpl Symb) const override;
66 error_code getSymbolType(DataRefImpl Symb,
67 SymbolRef::Type &Res) const override;
68 error_code getSymbolSection(DataRefImpl Symb,
69 section_iterator &Res) const override;
70 error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const override;
72 error_code getLibraryNext(DataRefImpl Data,
73 LibraryRef &Result) const override;
74 error_code getLibraryPath(DataRefImpl Data, StringRef &Res) const override;
76 void moveSectionNext(DataRefImpl &Sec) const override;
77 error_code getSectionName(DataRefImpl Sec, StringRef &Res) const override;
78 error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const override;
79 error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const override;
80 error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const override;
81 error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const override;
82 error_code isSectionText(DataRefImpl Sec, bool &Res) const override;
83 error_code isSectionData(DataRefImpl Sec, bool &Res) const override;
84 error_code isSectionBSS(DataRefImpl Sec, bool &Res) const override;
85 error_code isSectionRequiredForExecution(DataRefImpl Sec,
86 bool &Res) const override;
87 error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const override;
88 error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const override;
89 error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const override;
90 error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
91 bool &Result) const override;
92 relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
93 relocation_iterator section_rel_end(DataRefImpl Sec) const override;
94 bool section_rel_empty(DataRefImpl Sec) const override;
95 section_iterator getRelocatedSection(DataRefImpl Sec) const override;
97 void moveRelocationNext(DataRefImpl &Rel) const override;
98 error_code getRelocationAddress(DataRefImpl Rel,
99 uint64_t &Res) const override;
100 error_code getRelocationOffset(DataRefImpl Rel, uint64_t &Res) const override;
101 symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
102 error_code getRelocationType(DataRefImpl Rel, uint64_t &Res) const override;
103 error_code getRelocationTypeName(DataRefImpl Rel,
104 SmallVectorImpl<char> &Result) const override;
105 error_code getRelocationValueString(DataRefImpl Rel,
106 SmallVectorImpl<char> &Result) const override;
108 uint64_t getROffset(DataRefImpl Rel) const;
109 StringRef getRelocationTypeName(uint32_t Type) const;
111 /// \brief Get the relocation section that contains \a Rel.
112 const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
113 return EF.getSection(Rel.d.a);
116 const Elf_Rel *getRel(DataRefImpl Rel) const;
117 const Elf_Rela *getRela(DataRefImpl Rela) const;
119 Elf_Sym_Iter toELFSymIter(DataRefImpl Symb) const {
120 bool IsDynamic = Symb.p & 1;
123 EF.begin_dynamic_symbols().getEntSize(),
124 reinterpret_cast<const char *>(Symb.p & ~uintptr_t(1)), IsDynamic);
125 return Elf_Sym_Iter(EF.begin_symbols().getEntSize(),
126 reinterpret_cast<const char *>(Symb.p), IsDynamic);
129 DataRefImpl toDRI(Elf_Sym_Iter Symb) const {
131 DRI.p = reinterpret_cast<uintptr_t>(Symb.get()) |
132 static_cast<uintptr_t>(Symb.isDynamic());
136 Elf_Shdr_Iter toELFShdrIter(DataRefImpl Sec) const {
137 return Elf_Shdr_Iter(EF.getHeader()->e_shentsize,
138 reinterpret_cast<const char *>(Sec.p));
141 DataRefImpl toDRI(Elf_Shdr_Iter Sec) const {
143 DRI.p = reinterpret_cast<uintptr_t>(Sec.get());
147 DataRefImpl toDRI(const Elf_Shdr *Sec) const {
149 DRI.p = reinterpret_cast<uintptr_t>(Sec);
153 Elf_Dyn_Iter toELFDynIter(DataRefImpl Dyn) const {
154 return Elf_Dyn_Iter(EF.begin_dynamic_table().getEntSize(),
155 reinterpret_cast<const char *>(Dyn.p));
158 DataRefImpl toDRI(Elf_Dyn_Iter Dyn) const {
160 DRI.p = reinterpret_cast<uintptr_t>(Dyn.get());
164 // This flag is used for classof, to distinguish ELFObjectFile from
165 // its subclass. If more subclasses will be created, this flag will
166 // have to become an enum.
167 bool isDyldELFObject;
170 ELFObjectFile(MemoryBuffer *Object, error_code &EC, bool BufferOwned = true);
172 const Elf_Sym *getSymbol(DataRefImpl Symb) const;
174 basic_symbol_iterator symbol_begin_impl() const override;
175 basic_symbol_iterator symbol_end_impl() const override;
177 symbol_iterator dynamic_symbol_begin() const;
178 symbol_iterator dynamic_symbol_end() const;
180 section_iterator section_begin() const override;
181 section_iterator section_end() const override;
183 library_iterator needed_library_begin() const override;
184 library_iterator needed_library_end() const override;
186 error_code getRelocationAddend(DataRefImpl Rel, int64_t &Res) const;
187 error_code getSymbolVersion(SymbolRef Symb, StringRef &Version,
188 bool &IsDefault) const;
191 uint8_t getBytesInAddress() const override;
192 StringRef getFileFormatName() const override;
193 unsigned getArch() const override;
194 StringRef getLoadName() const override;
196 const ELFFile<ELFT> *getELFFile() const { return &EF; }
198 bool isDyldType() const { return isDyldELFObject; }
199 static inline bool classof(const Binary *v) {
200 return v->getType() == getELFType(ELFT::TargetEndianness == support::little,
205 // Use an alignment of 2 for the typedefs since that is the worst case for
206 // ELF files in archives.
207 typedef ELFObjectFile<ELFType<support::little, 2, false> > ELF32LEObjectFile;
208 typedef ELFObjectFile<ELFType<support::little, 2, true> > ELF64LEObjectFile;
209 typedef ELFObjectFile<ELFType<support::big, 2, false> > ELF32BEObjectFile;
210 typedef ELFObjectFile<ELFType<support::big, 2, true> > ELF64BEObjectFile;
212 template <class ELFT>
213 void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Symb) const {
214 Symb = toDRI(++toELFSymIter(Symb));
217 template <class ELFT>
218 error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb,
219 StringRef &Result) const {
220 ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb));
222 return Name.getError();
224 return object_error::success;
227 template <class ELFT>
228 error_code ELFObjectFile<ELFT>::getSymbolVersion(SymbolRef SymRef,
230 bool &IsDefault) const {
231 DataRefImpl Symb = SymRef.getRawDataRefImpl();
232 const Elf_Sym *symb = getSymbol(Symb);
233 ErrorOr<StringRef> Ver =
234 EF.getSymbolVersion(EF.getSection(Symb.d.b), symb, IsDefault);
236 return Ver.getError();
238 return object_error::success;
241 template <class ELFT>
242 error_code ELFObjectFile<ELFT>::getSymbolFileOffset(DataRefImpl Symb,
243 uint64_t &Result) const {
244 const Elf_Sym *ESym = getSymbol(Symb);
245 const Elf_Shdr *ESec;
246 switch (EF.getSymbolTableIndex(ESym)) {
247 case ELF::SHN_COMMON:
248 // Unintialized symbols have no offset in the object file
250 Result = UnknownAddressOrSize;
251 return object_error::success;
253 Result = ESym->st_value;
254 return object_error::success;
256 ESec = EF.getSection(ESym);
259 switch (ESym->getType()) {
260 case ELF::STT_SECTION:
261 Result = ESec ? ESec->sh_offset : UnknownAddressOrSize;
262 return object_error::success;
264 case ELF::STT_OBJECT:
265 case ELF::STT_NOTYPE:
266 Result = ESym->st_value + (ESec ? ESec->sh_offset : 0);
267 return object_error::success;
269 Result = UnknownAddressOrSize;
270 return object_error::success;
274 template <class ELFT>
275 error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
276 uint64_t &Result) const {
277 const Elf_Sym *ESym = getSymbol(Symb);
278 const Elf_Shdr *ESec;
279 switch (EF.getSymbolTableIndex(ESym)) {
280 case ELF::SHN_COMMON:
282 Result = UnknownAddressOrSize;
283 return object_error::success;
285 Result = ESym->st_value;
286 return object_error::success;
288 ESec = EF.getSection(ESym);
291 switch (ESym->getType()) {
292 case ELF::STT_SECTION:
293 Result = ESec ? ESec->sh_addr : UnknownAddressOrSize;
294 return object_error::success;
296 case ELF::STT_OBJECT:
297 case ELF::STT_NOTYPE:
300 switch (EF.getHeader()->e_type) {
303 IsRelocatable = false;
306 IsRelocatable = true;
308 Result = ESym->st_value;
310 // Clear the ARM/Thumb indicator flag.
311 if (EF.getHeader()->e_machine == ELF::EM_ARM)
314 if (IsRelocatable && ESec != 0)
315 Result += ESec->sh_addr;
316 return object_error::success;
318 Result = UnknownAddressOrSize;
319 return object_error::success;
323 template <class ELFT>
324 error_code ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb,
325 uint32_t &Res) const {
326 Elf_Sym_Iter Sym = toELFSymIter(Symb);
327 if (Sym->st_shndx == ELF::SHN_COMMON)
331 return object_error::success;
334 template <class ELFT>
335 error_code ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Symb,
336 uint64_t &Result) const {
337 Result = toELFSymIter(Symb)->st_size;
338 return object_error::success;
341 template <class ELFT>
342 error_code ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb,
343 SymbolRef::Type &Result) const {
344 const Elf_Sym *ESym = getSymbol(Symb);
346 switch (ESym->getType()) {
347 case ELF::STT_NOTYPE:
348 Result = SymbolRef::ST_Unknown;
350 case ELF::STT_SECTION:
351 Result = SymbolRef::ST_Debug;
354 Result = SymbolRef::ST_File;
357 Result = SymbolRef::ST_Function;
359 case ELF::STT_OBJECT:
360 case ELF::STT_COMMON:
362 Result = SymbolRef::ST_Data;
365 Result = SymbolRef::ST_Other;
368 return object_error::success;
371 template <class ELFT>
372 uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
373 Elf_Sym_Iter EIter = toELFSymIter(Symb);
374 const Elf_Sym *ESym = &*EIter;
376 uint32_t Result = SymbolRef::SF_None;
378 if (ESym->getBinding() != ELF::STB_LOCAL)
379 Result |= SymbolRef::SF_Global;
381 if (ESym->getBinding() == ELF::STB_WEAK)
382 Result |= SymbolRef::SF_Weak;
384 if (ESym->st_shndx == ELF::SHN_ABS)
385 Result |= SymbolRef::SF_Absolute;
387 if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
388 EIter == EF.begin_symbols() || EIter == EF.begin_dynamic_symbols())
389 Result |= SymbolRef::SF_FormatSpecific;
391 if (EF.getSymbolTableIndex(ESym) == ELF::SHN_UNDEF)
392 Result |= SymbolRef::SF_Undefined;
394 if (ESym->getType() == ELF::STT_COMMON ||
395 EF.getSymbolTableIndex(ESym) == ELF::SHN_COMMON)
396 Result |= SymbolRef::SF_Common;
401 template <class ELFT>
402 error_code ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
403 section_iterator &Res) const {
404 const Elf_Sym *ESym = getSymbol(Symb);
405 const Elf_Shdr *ESec = EF.getSection(ESym);
410 Sec.p = reinterpret_cast<intptr_t>(ESec);
411 Res = section_iterator(SectionRef(Sec, this));
413 return object_error::success;
416 template <class ELFT>
417 error_code ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb,
418 uint64_t &Val) const {
419 const Elf_Sym *ESym = getSymbol(Symb);
420 Val = ESym->st_value;
421 return object_error::success;
424 template <class ELFT>
425 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
426 Sec = toDRI(++toELFShdrIter(Sec));
429 template <class ELFT>
430 error_code ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec,
431 StringRef &Result) const {
432 ErrorOr<StringRef> Name = EF.getSectionName(&*toELFShdrIter(Sec));
434 return Name.getError();
436 return object_error::success;
439 template <class ELFT>
440 error_code ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec,
441 uint64_t &Result) const {
442 Result = toELFShdrIter(Sec)->sh_addr;
443 return object_error::success;
446 template <class ELFT>
447 error_code ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec,
448 uint64_t &Result) const {
449 Result = toELFShdrIter(Sec)->sh_size;
450 return object_error::success;
453 template <class ELFT>
454 error_code ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
455 StringRef &Result) const {
456 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
457 Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
458 return object_error::success;
461 template <class ELFT>
462 error_code ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec,
463 uint64_t &Result) const {
464 Result = toELFShdrIter(Sec)->sh_addralign;
465 return object_error::success;
468 template <class ELFT>
469 error_code ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec,
470 bool &Result) const {
471 Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_EXECINSTR;
472 return object_error::success;
475 template <class ELFT>
476 error_code ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec,
477 bool &Result) const {
478 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
479 Result = EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
480 EShdr->sh_type == ELF::SHT_PROGBITS;
481 return object_error::success;
484 template <class ELFT>
485 error_code ELFObjectFile<ELFT>::isSectionBSS(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_NOBITS;
490 return object_error::success;
493 template <class ELFT>
495 ELFObjectFile<ELFT>::isSectionRequiredForExecution(DataRefImpl Sec,
496 bool &Result) const {
497 Result = toELFShdrIter(Sec)->sh_flags & ELF::SHF_ALLOC;
498 return object_error::success;
501 template <class ELFT>
502 error_code ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec,
503 bool &Result) const {
504 Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
505 return object_error::success;
508 template <class ELFT>
509 error_code ELFObjectFile<ELFT>::isSectionZeroInit(DataRefImpl Sec,
510 bool &Result) const {
511 Result = toELFShdrIter(Sec)->sh_type == ELF::SHT_NOBITS;
512 return object_error::success;
515 template <class ELFT>
516 error_code ELFObjectFile<ELFT>::isSectionReadOnlyData(DataRefImpl Sec,
517 bool &Result) const {
518 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
519 Result = !(EShdr->sh_flags & (ELF::SHF_WRITE | ELF::SHF_EXECINSTR));
520 return object_error::success;
523 template <class ELFT>
524 error_code ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
526 bool &Result) const {
527 Elf_Sym_Iter ESym = toELFSymIter(Symb);
529 uintX_t Index = ESym->st_shndx;
530 bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
532 Result = !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
533 return object_error::success;
536 template <class ELFT>
538 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
540 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
541 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
543 return relocation_iterator(RelocationRef(RelData, this));
546 template <class ELFT>
548 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
550 uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
551 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
552 RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
553 if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
556 RelData.d.b = S->sh_size / S->sh_entsize;
558 return relocation_iterator(RelocationRef(RelData, this));
561 template <class ELFT>
562 bool ELFObjectFile<ELFT>::section_rel_empty(DataRefImpl Sec) const {
563 const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
564 return S->sh_size == 0;
567 template <class ELFT>
569 ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
570 if (EF.getHeader()->e_type != ELF::ET_REL)
571 return section_end();
573 Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
574 uintX_t Type = EShdr->sh_type;
575 if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
576 return section_end();
578 const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
579 return section_iterator(SectionRef(toDRI(R), this));
583 template <class ELFT>
584 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
588 template <class ELFT>
590 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
592 const Elf_Shdr *sec = getRelSection(Rel);
593 switch (sec->sh_type) {
595 report_fatal_error("Invalid section type in Rel!");
597 symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
600 case ELF::SHT_RELA: {
601 symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
608 const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
610 DataRefImpl SymbolData;
611 switch (SymSec->sh_type) {
613 report_fatal_error("Invalid symbol table section type!");
614 case ELF::SHT_SYMTAB:
615 SymbolData = toDRI(EF.begin_symbols() + symbolIdx);
617 case ELF::SHT_DYNSYM:
618 SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx);
622 return symbol_iterator(SymbolRef(SymbolData, this));
625 template <class ELFT>
626 error_code ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
627 uint64_t &Result) const {
628 assert((EF.getHeader()->e_type == ELF::ET_EXEC ||
629 EF.getHeader()->e_type == ELF::ET_DYN) &&
630 "Only executable and shared objects files have relocation addresses");
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 assert(EF.getHeader()->e_type == ELF::ET_REL &&
639 "Only relocatable object files have relocation offsets");
640 Result = getROffset(Rel);
641 return object_error::success;
644 template <class ELFT>
645 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
646 const Elf_Shdr *sec = getRelSection(Rel);
647 switch (sec->sh_type) {
649 report_fatal_error("Invalid section type in Rel!");
651 return getRel(Rel)->r_offset;
653 return getRela(Rel)->r_offset;
657 template <class ELFT>
658 error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel,
659 uint64_t &Result) const {
660 const Elf_Shdr *sec = getRelSection(Rel);
661 switch (sec->sh_type) {
663 report_fatal_error("Invalid section type in Rel!");
665 Result = getRel(Rel)->getType(EF.isMips64EL());
668 case ELF::SHT_RELA: {
669 Result = getRela(Rel)->getType(EF.isMips64EL());
673 return object_error::success;
676 template <class ELFT>
677 StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
678 return getELFRelocationTypeName(EF.getHeader()->e_machine, Type);
681 template <class ELFT>
682 error_code ELFObjectFile<ELFT>::getRelocationTypeName(
683 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
684 const Elf_Shdr *sec = getRelSection(Rel);
686 switch (sec->sh_type) {
688 return object_error::parse_failed;
690 type = getRel(Rel)->getType(EF.isMips64EL());
693 case ELF::SHT_RELA: {
694 type = getRela(Rel)->getType(EF.isMips64EL());
699 EF.getRelocationTypeName(type, Result);
700 return object_error::success;
703 template <class ELFT>
704 error_code ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel,
705 int64_t &Result) const {
706 const Elf_Shdr *sec = getRelSection(Rel);
707 switch (sec->sh_type) {
709 report_fatal_error("Invalid section type in Rel!");
712 return object_error::success;
714 case ELF::SHT_RELA: {
715 Result = getRela(Rel)->r_addend;
716 return object_error::success;
721 template <class ELFT>
722 error_code ELFObjectFile<ELFT>::getRelocationValueString(
723 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
724 const Elf_Shdr *sec = getRelSection(Rel);
728 uint16_t symbol_index = 0;
729 switch (sec->sh_type) {
731 return object_error::parse_failed;
733 type = getRel(Rel)->getType(EF.isMips64EL());
734 symbol_index = getRel(Rel)->getSymbol(EF.isMips64EL());
735 // TODO: Read implicit addend from section data.
738 case ELF::SHT_RELA: {
739 type = getRela(Rel)->getType(EF.isMips64EL());
740 symbol_index = getRela(Rel)->getSymbol(EF.isMips64EL());
741 addend = getRela(Rel)->r_addend;
745 const Elf_Sym *symb =
746 EF.template getEntry<Elf_Sym>(sec->sh_link, symbol_index);
747 ErrorOr<StringRef> SymName =
748 EF.getSymbolName(EF.getSection(sec->sh_link), symb);
750 return SymName.getError();
751 switch (EF.getHeader()->e_machine) {
754 case ELF::R_X86_64_PC8:
755 case ELF::R_X86_64_PC16:
756 case ELF::R_X86_64_PC32: {
758 raw_string_ostream fmt(fmtbuf);
759 fmt << *SymName << (addend < 0 ? "" : "+") << addend << "-P";
761 Result.append(fmtbuf.begin(), fmtbuf.end());
763 case ELF::R_X86_64_8:
764 case ELF::R_X86_64_16:
765 case ELF::R_X86_64_32:
766 case ELF::R_X86_64_32S:
767 case ELF::R_X86_64_64: {
769 raw_string_ostream fmt(fmtbuf);
770 fmt << *SymName << (addend < 0 ? "" : "+") << addend;
772 Result.append(fmtbuf.begin(), fmtbuf.end());
778 case ELF::EM_AARCH64: {
780 raw_string_ostream fmt(fmtbuf);
783 fmt << (addend < 0 ? "" : "+") << addend;
785 Result.append(fmtbuf.begin(), fmtbuf.end());
789 case ELF::EM_HEXAGON:
797 Result.append(res.begin(), res.end());
798 return object_error::success;
801 template <class ELFT>
802 const typename ELFFile<ELFT>::Elf_Sym *
803 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
804 return &*toELFSymIter(Symb);
807 template <class ELFT>
808 const typename ELFObjectFile<ELFT>::Elf_Rel *
809 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
810 return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
813 template <class ELFT>
814 const typename ELFObjectFile<ELFT>::Elf_Rela *
815 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
816 return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
819 template <class ELFT>
820 ELFObjectFile<ELFT>::ELFObjectFile(MemoryBuffer *Object, error_code &ec,
822 : ObjectFile(getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
825 Object, BufferOwned),
828 template <class ELFT>
829 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
830 return basic_symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this));
833 template <class ELFT>
834 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
835 return basic_symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this));
838 template <class ELFT>
839 symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
840 return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this));
843 template <class ELFT>
844 symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
845 return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this));
848 template <class ELFT>
849 section_iterator ELFObjectFile<ELFT>::section_begin() const {
850 return section_iterator(SectionRef(toDRI(EF.begin_sections()), this));
853 template <class ELFT>
854 section_iterator ELFObjectFile<ELFT>::section_end() const {
855 return section_iterator(SectionRef(toDRI(EF.end_sections()), this));
858 template <class ELFT>
859 StringRef ELFObjectFile<ELFT>::getLoadName() const {
860 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
861 Elf_Dyn_Iter DE = EF.end_dynamic_table();
863 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
867 return EF.getDynamicString(DI->getVal());
871 template <class ELFT>
872 library_iterator ELFObjectFile<ELFT>::needed_library_begin() const {
873 Elf_Dyn_Iter DI = EF.begin_dynamic_table();
874 Elf_Dyn_Iter DE = EF.end_dynamic_table();
876 while (DI != DE && DI->getTag() != ELF::DT_SONAME)
879 return library_iterator(LibraryRef(toDRI(DI), this));
882 template <class ELFT>
883 error_code ELFObjectFile<ELFT>::getLibraryNext(DataRefImpl Data,
884 LibraryRef &Result) const {
885 Elf_Dyn_Iter DI = toELFDynIter(Data);
886 Elf_Dyn_Iter DE = EF.end_dynamic_table();
888 // Skip to the next DT_NEEDED entry.
891 while (DI != DE && DI->getTag() != ELF::DT_NEEDED);
893 Result = LibraryRef(toDRI(DI), this);
894 return object_error::success;
897 template <class ELFT>
898 error_code ELFObjectFile<ELFT>::getLibraryPath(DataRefImpl Data,
899 StringRef &Res) const {
900 Res = EF.getDynamicString(toELFDynIter(Data)->getVal());
901 return object_error::success;
904 template <class ELFT>
905 library_iterator ELFObjectFile<ELFT>::needed_library_end() const {
906 return library_iterator(LibraryRef(toDRI(EF.end_dynamic_table()), this));
909 template <class ELFT>
910 uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
911 return ELFT::Is64Bits ? 8 : 4;
914 template <class ELFT>
915 StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
916 switch (EF.getHeader()->e_ident[ELF::EI_CLASS]) {
917 case ELF::ELFCLASS32:
918 switch (EF.getHeader()->e_machine) {
922 return "ELF32-x86-64";
925 case ELF::EM_HEXAGON:
926 return "ELF32-hexagon";
932 case ELF::EM_SPARC32PLUS:
933 return "ELF32-sparc";
935 return "ELF32-unknown";
937 case ELF::ELFCLASS64:
938 switch (EF.getHeader()->e_machine) {
942 return "ELF64-x86-64";
943 case ELF::EM_AARCH64:
944 return "ELF64-aarch64";
946 return "ELF64-ppc64";
949 case ELF::EM_SPARCV9:
950 return "ELF64-sparc";
954 return "ELF64-unknown";
957 // FIXME: Proper error handling.
958 report_fatal_error("Invalid ELFCLASS!");
962 template <class ELFT>
963 unsigned ELFObjectFile<ELFT>::getArch() const {
964 switch (EF.getHeader()->e_machine) {
968 return Triple::x86_64;
969 case ELF::EM_AARCH64:
970 return Triple::aarch64;
973 case ELF::EM_HEXAGON:
974 return Triple::hexagon;
976 return (ELFT::TargetEndianness == support::little) ? Triple::mipsel
979 return (ELFT::TargetEndianness == support::little) ? Triple::ppc64le
982 return Triple::systemz;
985 case ELF::EM_SPARC32PLUS:
986 return Triple::sparc;
987 case ELF::EM_SPARCV9:
988 return Triple::sparcv9;
991 return Triple::UnknownArch;
995 /// FIXME: Maybe we should have a base ElfObjectFile that is not a template
996 /// and make these member functions?
997 inline error_code getELFRelocationAddend(const RelocationRef R,
999 const ObjectFile *Obj = R.getObjectFile();
1000 DataRefImpl DRI = R.getRawDataRefImpl();
1001 // Little-endian 32-bit
1002 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
1003 return ELFObj->getRelocationAddend(DRI, Addend);
1005 // Big-endian 32-bit
1006 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
1007 return ELFObj->getRelocationAddend(DRI, Addend);
1009 // Little-endian 64-bit
1010 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
1011 return ELFObj->getRelocationAddend(DRI, Addend);
1013 // Big-endian 64-bit
1014 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
1015 return ELFObj->getRelocationAddend(DRI, Addend);
1017 llvm_unreachable("Object passed to getELFRelocationAddend() is not ELF");
1020 inline std::pair<symbol_iterator, symbol_iterator>
1021 getELFDynamicSymbolIterators(SymbolicFile *Obj) {
1022 if (const ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
1023 return std::make_pair(ELF->dynamic_symbol_begin(),
1024 ELF->dynamic_symbol_end());
1025 if (const ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
1026 return std::make_pair(ELF->dynamic_symbol_begin(),
1027 ELF->dynamic_symbol_end());
1028 if (const ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
1029 return std::make_pair(ELF->dynamic_symbol_begin(),
1030 ELF->dynamic_symbol_end());
1031 if (const ELF64BEObjectFile *ELF = cast<ELF64BEObjectFile>(Obj))
1032 return std::make_pair(ELF->dynamic_symbol_begin(),
1033 ELF->dynamic_symbol_end());
1036 "Object passed to getELFDynamicSymbolIterators() is not ELF");
1039 /// This is a generic interface for retrieving GNU symbol version
1040 /// information from an ELFObjectFile.
1041 inline error_code GetELFSymbolVersion(const ObjectFile *Obj,
1042 const SymbolRef &Sym, StringRef &Version,
1044 // Little-endian 32-bit
1045 if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
1046 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1048 // Big-endian 32-bit
1049 if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
1050 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1052 // Little-endian 64-bit
1053 if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
1054 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1056 // Big-endian 64-bit
1057 if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
1058 return ELFObj->getSymbolVersion(Sym, Version, IsDefault);
1060 llvm_unreachable("Object passed to GetELFSymbolVersion() is not ELF");