1 //===- lib/MC/ELFObjectWriter.cpp - ELF File Writer -------------------===//
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 implements ELF object file writer information.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/MC/ELFObjectWriter.h"
15 #include "llvm/ADT/SmallPtrSet.h"
16 #include "llvm/ADT/STLExtras.h"
17 #include "llvm/ADT/StringMap.h"
18 #include "llvm/ADT/Twine.h"
19 #include "llvm/MC/MCAssembler.h"
20 #include "llvm/MC/MCAsmLayout.h"
21 #include "llvm/MC/MCContext.h"
22 #include "llvm/MC/MCELFSymbolFlags.h"
23 #include "llvm/MC/MCExpr.h"
24 #include "llvm/MC/MCObjectWriter.h"
25 #include "llvm/MC/MCSectionELF.h"
26 #include "llvm/MC/MCSymbol.h"
27 #include "llvm/MC/MCValue.h"
28 #include "llvm/Support/Debug.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/ELF.h"
31 #include "llvm/Target/TargetAsmBackend.h"
33 #include "../Target/X86/X86FixupKinds.h"
38 static unsigned GetType(const MCSymbolData &SD) {
39 uint32_t Type = (SD.getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift;
40 assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
41 Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
42 Type == ELF::STT_FILE || Type == ELF::STT_COMMON ||
43 Type == ELF::STT_TLS);
47 static unsigned GetBinding(const MCSymbolData &SD) {
48 uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift;
49 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
50 Binding == ELF::STB_WEAK);
54 static void SetBinding(MCSymbolData &SD, unsigned Binding) {
55 assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
56 Binding == ELF::STB_WEAK);
57 uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift);
58 SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift));
61 static unsigned GetVisibility(MCSymbolData &SD) {
63 (SD.getFlags() & (0xf << ELF_STV_Shift)) >> ELF_STV_Shift;
64 assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
65 Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
69 static bool isFixupKindX86PCRel(unsigned Kind) {
73 case X86::reloc_pcrel_1byte:
74 case X86::reloc_pcrel_4byte:
75 case X86::reloc_riprel_4byte:
76 case X86::reloc_riprel_4byte_movq_load:
81 static bool RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant) {
85 case MCSymbolRefExpr::VK_GOT:
86 case MCSymbolRefExpr::VK_PLT:
87 case MCSymbolRefExpr::VK_GOTPCREL:
88 case MCSymbolRefExpr::VK_TPOFF:
89 case MCSymbolRefExpr::VK_TLSGD:
90 case MCSymbolRefExpr::VK_GOTTPOFF:
91 case MCSymbolRefExpr::VK_INDNTPOFF:
92 case MCSymbolRefExpr::VK_NTPOFF:
93 case MCSymbolRefExpr::VK_GOTNTPOFF:
94 case MCSymbolRefExpr::VK_TLSLDM:
95 case MCSymbolRefExpr::VK_DTPOFF:
96 case MCSymbolRefExpr::VK_TLSLD:
103 class ELFObjectWriterImpl {
104 /*static bool isFixupKindX86RIPRel(unsigned Kind) {
105 return Kind == X86::reloc_riprel_4byte ||
106 Kind == X86::reloc_riprel_4byte_movq_load;
110 /// ELFSymbolData - Helper struct for containing some precomputed information
112 struct ELFSymbolData {
113 MCSymbolData *SymbolData;
114 uint64_t StringIndex;
115 uint32_t SectionIndex;
117 // Support lexicographic sorting.
118 bool operator<(const ELFSymbolData &RHS) const {
119 if (GetType(*SymbolData) == ELF::STT_FILE)
121 if (GetType(*RHS.SymbolData) == ELF::STT_FILE)
123 return SymbolData->getSymbol().getName() <
124 RHS.SymbolData->getSymbol().getName();
128 /// @name Relocation Data
131 struct ELFRelocationEntry {
132 // Make these big enough for both 32-bit and 64-bit
136 const MCSymbol *Symbol;
139 // Support lexicographic sorting.
140 bool operator<(const ELFRelocationEntry &RE) const {
141 return RE.r_offset < r_offset;
145 SmallPtrSet<const MCSymbol *, 16> UsedInReloc;
146 DenseMap<const MCSymbol *, const MCSymbol *> Renames;
148 llvm::DenseMap<const MCSectionData*,
149 std::vector<ELFRelocationEntry> > Relocations;
150 DenseMap<const MCSection*, uint64_t> SectionStringTableIndex;
153 /// @name Symbol Table Data
156 SmallString<256> StringTable;
157 std::vector<ELFSymbolData> LocalSymbolData;
158 std::vector<ELFSymbolData> ExternalSymbolData;
159 std::vector<ELFSymbolData> UndefinedSymbolData;
163 int NumRegularSections;
167 bool NeedsSymtabShndx;
169 ELFObjectWriter *Writer;
173 unsigned Is64Bit : 1;
175 bool HasRelocationAddend;
177 Triple::OSType OSType;
181 // This holds the symbol table index of the last local symbol.
182 unsigned LastLocalSymbolIndex;
183 // This holds the .strtab section index.
184 unsigned StringTableIndex;
185 // This holds the .symtab section index.
186 unsigned SymbolTableIndex;
188 unsigned ShstrtabIndex;
191 ELFObjectWriterImpl(ELFObjectWriter *_Writer, bool _Is64Bit,
192 uint16_t _EMachine, bool _HasRelAddend,
193 Triple::OSType _OSType)
194 : NeedsGOT(false), NeedsSymtabShndx(false), Writer(_Writer),
195 OS(Writer->getStream()),
196 Is64Bit(_Is64Bit), HasRelocationAddend(_HasRelAddend),
197 OSType(_OSType), EMachine(_EMachine) {
200 void Write8(uint8_t Value) { Writer->Write8(Value); }
201 void Write16(uint16_t Value) { Writer->Write16(Value); }
202 void Write32(uint32_t Value) { Writer->Write32(Value); }
203 //void Write64(uint64_t Value) { Writer->Write64(Value); }
204 void WriteZeros(unsigned N) { Writer->WriteZeros(N); }
205 //void WriteBytes(StringRef Str, unsigned ZeroFillSize = 0) {
206 // Writer->WriteBytes(Str, ZeroFillSize);
209 void WriteWord(uint64_t W) {
216 void String8(char *buf, uint8_t Value) {
220 void StringLE16(char *buf, uint16_t Value) {
221 buf[0] = char(Value >> 0);
222 buf[1] = char(Value >> 8);
225 void StringLE32(char *buf, uint32_t Value) {
226 StringLE16(buf, uint16_t(Value >> 0));
227 StringLE16(buf + 2, uint16_t(Value >> 16));
230 void StringLE64(char *buf, uint64_t Value) {
231 StringLE32(buf, uint32_t(Value >> 0));
232 StringLE32(buf + 4, uint32_t(Value >> 32));
235 void StringBE16(char *buf ,uint16_t Value) {
236 buf[0] = char(Value >> 8);
237 buf[1] = char(Value >> 0);
240 void StringBE32(char *buf, uint32_t Value) {
241 StringBE16(buf, uint16_t(Value >> 16));
242 StringBE16(buf + 2, uint16_t(Value >> 0));
245 void StringBE64(char *buf, uint64_t Value) {
246 StringBE32(buf, uint32_t(Value >> 32));
247 StringBE32(buf + 4, uint32_t(Value >> 0));
250 void String16(char *buf, uint16_t Value) {
251 if (Writer->isLittleEndian())
252 StringLE16(buf, Value);
254 StringBE16(buf, Value);
257 void String32(char *buf, uint32_t Value) {
258 if (Writer->isLittleEndian())
259 StringLE32(buf, Value);
261 StringBE32(buf, Value);
264 void String64(char *buf, uint64_t Value) {
265 if (Writer->isLittleEndian())
266 StringLE64(buf, Value);
268 StringBE64(buf, Value);
271 void WriteHeader(uint64_t SectionDataSize, unsigned NumberOfSections);
273 void WriteSymbolEntry(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
274 uint64_t name, uint8_t info,
275 uint64_t value, uint64_t size,
276 uint8_t other, uint32_t shndx,
279 void WriteSymbol(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
281 const MCAsmLayout &Layout);
283 void WriteSymbolTable(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
284 const MCAssembler &Asm,
285 const MCAsmLayout &Layout,
286 unsigned NumRegularSections);
288 void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout,
289 const MCFragment *Fragment, const MCFixup &Fixup,
290 MCValue Target, uint64_t &FixedValue);
292 uint64_t getSymbolIndexInSymbolTable(const MCAssembler &Asm,
295 /// ComputeSymbolTable - Compute the symbol table data
297 /// \param StringTable [out] - The string table data.
298 /// \param StringIndexMap [out] - Map from symbol names to offsets in the
300 void ComputeSymbolTable(MCAssembler &Asm);
302 void WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout,
303 const MCSectionData &SD);
305 void WriteRelocations(MCAssembler &Asm, MCAsmLayout &Layout) {
306 for (MCAssembler::const_iterator it = Asm.begin(),
307 ie = Asm.end(); it != ie; ++it) {
308 WriteRelocation(Asm, Layout, *it);
312 void CreateMetadataSections(MCAssembler &Asm, MCAsmLayout &Layout);
314 void ExecutePostLayoutBinding(MCAssembler &Asm);
316 void WriteSecHdrEntry(uint32_t Name, uint32_t Type, uint64_t Flags,
317 uint64_t Address, uint64_t Offset,
318 uint64_t Size, uint32_t Link, uint32_t Info,
319 uint64_t Alignment, uint64_t EntrySize);
321 void WriteRelocationsFragment(const MCAssembler &Asm, MCDataFragment *F,
322 const MCSectionData *SD);
324 bool IsFixupFullyResolved(const MCAssembler &Asm,
325 const MCValue Target,
327 const MCFragment *DF) const;
329 void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout);
334 // Emit the ELF header.
335 void ELFObjectWriterImpl::WriteHeader(uint64_t SectionDataSize,
336 unsigned NumberOfSections) {
342 // emitWord method behaves differently for ELF32 and ELF64, writing
343 // 4 bytes in the former and 8 in the latter.
345 Write8(0x7f); // e_ident[EI_MAG0]
346 Write8('E'); // e_ident[EI_MAG1]
347 Write8('L'); // e_ident[EI_MAG2]
348 Write8('F'); // e_ident[EI_MAG3]
350 Write8(Is64Bit ? ELF::ELFCLASS64 : ELF::ELFCLASS32); // e_ident[EI_CLASS]
353 Write8(Writer->isLittleEndian() ? ELF::ELFDATA2LSB : ELF::ELFDATA2MSB);
355 Write8(ELF::EV_CURRENT); // e_ident[EI_VERSION]
358 case Triple::FreeBSD: Write8(ELF::ELFOSABI_FREEBSD); break;
359 case Triple::Linux: Write8(ELF::ELFOSABI_LINUX); break;
360 default: Write8(ELF::ELFOSABI_NONE); break;
362 Write8(0); // e_ident[EI_ABIVERSION]
364 WriteZeros(ELF::EI_NIDENT - ELF::EI_PAD);
366 Write16(ELF::ET_REL); // e_type
368 Write16(EMachine); // e_machine = target
370 Write32(ELF::EV_CURRENT); // e_version
371 WriteWord(0); // e_entry, no entry point in .o file
372 WriteWord(0); // e_phoff, no program header for .o
373 WriteWord(SectionDataSize + (Is64Bit ? sizeof(ELF::Elf64_Ehdr) :
374 sizeof(ELF::Elf32_Ehdr))); // e_shoff = sec hdr table off in bytes
376 // FIXME: Make this configurable.
377 Write32(0); // e_flags = whatever the target wants
379 // e_ehsize = ELF header size
380 Write16(Is64Bit ? sizeof(ELF::Elf64_Ehdr) : sizeof(ELF::Elf32_Ehdr));
382 Write16(0); // e_phentsize = prog header entry size
383 Write16(0); // e_phnum = # prog header entries = 0
385 // e_shentsize = Section header entry size
386 Write16(Is64Bit ? sizeof(ELF::Elf64_Shdr) : sizeof(ELF::Elf32_Shdr));
388 // e_shnum = # of section header ents
389 if (NumberOfSections >= ELF::SHN_LORESERVE)
392 Write16(NumberOfSections);
394 // e_shstrndx = Section # of '.shstrtab'
395 if (NumberOfSections >= ELF::SHN_LORESERVE)
396 Write16(ELF::SHN_XINDEX);
398 Write16(ShstrtabIndex);
401 void ELFObjectWriterImpl::WriteSymbolEntry(MCDataFragment *SymtabF,
402 MCDataFragment *ShndxF,
404 uint8_t info, uint64_t value,
405 uint64_t size, uint8_t other,
410 if (shndx >= ELF::SHN_LORESERVE && !Reserved)
411 String32(buf, shndx);
414 ShndxF->getContents() += StringRef(buf, 4);
421 SymtabF->getContents() += StringRef(buf, 4); // st_name
424 SymtabF->getContents() += StringRef(buf, 1); // st_info
427 SymtabF->getContents() += StringRef(buf, 1); // st_other
429 if (shndx >= ELF::SHN_LORESERVE && !Reserved)
430 String16(buf, ELF::SHN_XINDEX);
432 String16(buf, shndx);
434 SymtabF->getContents() += StringRef(buf, 2); // st_shndx
436 String64(buf, value);
437 SymtabF->getContents() += StringRef(buf, 8); // st_value
440 SymtabF->getContents() += StringRef(buf, 8); // st_size
445 SymtabF->getContents() += StringRef(buf, 4); // st_name
447 String32(buf, value);
448 SymtabF->getContents() += StringRef(buf, 4); // st_value
451 SymtabF->getContents() += StringRef(buf, 4); // st_size
454 SymtabF->getContents() += StringRef(buf, 1); // st_info
457 SymtabF->getContents() += StringRef(buf, 1); // st_other
459 if (shndx >= ELF::SHN_LORESERVE && !Reserved)
460 String16(buf, ELF::SHN_XINDEX);
462 String16(buf, shndx);
464 SymtabF->getContents() += StringRef(buf, 2); // st_shndx
468 static uint64_t SymbolValue(MCSymbolData &Data, const MCAsmLayout &Layout) {
469 if (Data.isCommon() && Data.isExternal())
470 return Data.getCommonAlignment();
472 const MCSymbol &Symbol = Data.getSymbol();
473 if (!Symbol.isInSection())
476 if (MCFragment *FF = Data.getFragment())
477 return Layout.getSymbolAddress(&Data) -
478 Layout.getSectionAddress(FF->getParent());
483 static const MCSymbol &AliasedSymbol(const MCSymbol &Symbol) {
484 const MCSymbol *S = &Symbol;
485 while (S->isVariable()) {
486 const MCExpr *Value = S->getVariableValue();
487 if (Value->getKind() != MCExpr::SymbolRef)
489 const MCSymbolRefExpr *Ref = static_cast<const MCSymbolRefExpr*>(Value);
490 S = &Ref->getSymbol();
495 void ELFObjectWriterImpl::ExecutePostLayoutBinding(MCAssembler &Asm) {
496 // The presence of symbol versions causes undefined symbols and
497 // versions declared with @@@ to be renamed.
499 for (MCAssembler::symbol_iterator it = Asm.symbol_begin(),
500 ie = Asm.symbol_end(); it != ie; ++it) {
501 const MCSymbol &Alias = it->getSymbol();
502 const MCSymbol &Symbol = AliasedSymbol(Alias);
503 MCSymbolData &SD = Asm.getSymbolData(Symbol);
505 // Undefined symbols are global, but this is the first place we
506 // are able to set it.
507 if (Symbol.isUndefined() && !Symbol.isVariable()) {
508 if (GetBinding(SD) == ELF::STB_LOCAL) {
509 SetBinding(SD, ELF::STB_GLOBAL);
510 SetBinding(*it, ELF::STB_GLOBAL);
515 if (&Symbol == &Alias)
518 StringRef AliasName = Alias.getName();
519 size_t Pos = AliasName.find('@');
520 if (Pos == StringRef::npos)
523 // Aliases defined with .symvar copy the binding from the symbol they alias.
524 // This is the first place we are able to copy this information.
525 it->setExternal(SD.isExternal());
526 SetBinding(*it, GetBinding(SD));
528 StringRef Rest = AliasName.substr(Pos);
529 if (!Symbol.isUndefined() && !Rest.startswith("@@@"))
532 // FIXME: produce a better error message.
533 if (Symbol.isUndefined() && Rest.startswith("@@") &&
534 !Rest.startswith("@@@"))
535 report_fatal_error("A @@ version cannot be undefined");
537 Renames.insert(std::make_pair(&Symbol, &Alias));
541 void ELFObjectWriterImpl::WriteSymbol(MCDataFragment *SymtabF,
542 MCDataFragment *ShndxF,
544 const MCAsmLayout &Layout) {
545 MCSymbolData &OrigData = *MSD.SymbolData;
547 Layout.getAssembler().getSymbolData(AliasedSymbol(OrigData.getSymbol()));
549 bool IsReserved = Data.isCommon() || Data.getSymbol().isAbsolute() ||
550 Data.getSymbol().isVariable();
552 uint8_t Binding = GetBinding(OrigData);
553 uint8_t Visibility = GetVisibility(OrigData);
554 uint8_t Type = GetType(Data);
556 uint8_t Info = (Binding << ELF_STB_Shift) | (Type << ELF_STT_Shift);
557 uint8_t Other = Visibility;
559 uint64_t Value = SymbolValue(Data, Layout);
563 assert(!(Data.isCommon() && !Data.isExternal()));
565 ESize = Data.getSize();
566 if (Data.getSize()) {
568 if (ESize->getKind() == MCExpr::Binary) {
569 const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(ESize);
571 if (BE->EvaluateAsRelocatable(Res, &Layout)) {
572 assert(!Res.getSymA() || !Res.getSymA()->getSymbol().isDefined());
573 assert(!Res.getSymB() || !Res.getSymB()->getSymbol().isDefined());
574 Size = Res.getConstant();
576 } else if (ESize->getKind() == MCExpr::Constant) {
577 Size = static_cast<const MCConstantExpr *>(ESize)->getValue();
579 assert(0 && "Unsupported size expression");
583 // Write out the symbol table entry
584 WriteSymbolEntry(SymtabF, ShndxF, MSD.StringIndex, Info, Value,
585 Size, Other, MSD.SectionIndex, IsReserved);
588 void ELFObjectWriterImpl::WriteSymbolTable(MCDataFragment *SymtabF,
589 MCDataFragment *ShndxF,
590 const MCAssembler &Asm,
591 const MCAsmLayout &Layout,
592 unsigned NumRegularSections) {
593 // The string table must be emitted first because we need the index
594 // into the string table for all the symbol names.
595 assert(StringTable.size() && "Missing string table");
597 // FIXME: Make sure the start of the symbol table is aligned.
599 // The first entry is the undefined symbol entry.
600 WriteSymbolEntry(SymtabF, ShndxF, 0, 0, 0, 0, 0, 0, false);
602 // Write the symbol table entries.
603 LastLocalSymbolIndex = LocalSymbolData.size() + 1;
604 for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i) {
605 ELFSymbolData &MSD = LocalSymbolData[i];
606 WriteSymbol(SymtabF, ShndxF, MSD, Layout);
609 // Write out a symbol table entry for each regular section.
611 for (MCAssembler::const_iterator it = Asm.begin();
612 Index <= NumRegularSections; ++it, ++Index) {
613 const MCSectionELF &Section =
614 static_cast<const MCSectionELF&>(it->getSection());
615 // Leave out relocations so we don't have indexes within
616 // the relocations messed up
617 if (Section.getType() == ELF::SHT_RELA || Section.getType() == ELF::SHT_REL)
619 WriteSymbolEntry(SymtabF, ShndxF, 0, ELF::STT_SECTION, 0, 0,
620 ELF::STV_DEFAULT, Index, false);
621 LastLocalSymbolIndex++;
624 for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i) {
625 ELFSymbolData &MSD = ExternalSymbolData[i];
626 MCSymbolData &Data = *MSD.SymbolData;
627 assert(((Data.getFlags() & ELF_STB_Global) ||
628 (Data.getFlags() & ELF_STB_Weak)) &&
629 "External symbol requires STB_GLOBAL or STB_WEAK flag");
630 WriteSymbol(SymtabF, ShndxF, MSD, Layout);
631 if (GetBinding(Data) == ELF::STB_LOCAL)
632 LastLocalSymbolIndex++;
635 for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i) {
636 ELFSymbolData &MSD = UndefinedSymbolData[i];
637 MCSymbolData &Data = *MSD.SymbolData;
638 WriteSymbol(SymtabF, ShndxF, MSD, Layout);
639 if (GetBinding(Data) == ELF::STB_LOCAL)
640 LastLocalSymbolIndex++;
644 static bool ShouldRelocOnSymbol(const MCSymbolData &SD,
645 const MCValue &Target,
646 const MCFragment &F) {
647 const MCSymbol &Symbol = SD.getSymbol();
648 if (Symbol.isUndefined())
651 const MCSectionELF &Section =
652 static_cast<const MCSectionELF&>(Symbol.getSection());
657 MCSymbolRefExpr::VariantKind Kind = Target.getSymA()->getKind();
658 const MCSectionELF &Sec2 =
659 static_cast<const MCSectionELF&>(F.getParent()->getSection());
661 if (Section.getKind().isBSS())
664 if (&Sec2 != &Section &&
665 (Kind == MCSymbolRefExpr::VK_PLT ||
666 Kind == MCSymbolRefExpr::VK_GOTPCREL ||
667 Kind == MCSymbolRefExpr::VK_GOTOFF))
670 if (Section.getFlags() & MCSectionELF::SHF_MERGE)
671 return Target.getConstant() != 0;
676 // FIXME: this is currently X86/X86_64 only
677 void ELFObjectWriterImpl::RecordRelocation(const MCAssembler &Asm,
678 const MCAsmLayout &Layout,
679 const MCFragment *Fragment,
680 const MCFixup &Fixup,
682 uint64_t &FixedValue) {
685 int64_t Value = Target.getConstant();
686 const MCSymbol *Symbol = 0;
687 const MCSymbol *Renamed = 0;
689 bool IsPCRel = isFixupKindX86PCRel(Fixup.getKind());
690 if (!Target.isAbsolute()) {
691 Symbol = &AliasedSymbol(Target.getSymA()->getSymbol());
692 Renamed = Renames.lookup(Symbol);
695 MCSymbolData &SD = Asm.getSymbolData(*Symbol);
696 MCFragment *F = SD.getFragment();
698 if (const MCSymbolRefExpr *RefB = Target.getSymB()) {
699 const MCSymbol &SymbolB = RefB->getSymbol();
700 MCSymbolData &SDB = Asm.getSymbolData(SymbolB);
702 MCSectionData *Sec = Fragment->getParent();
704 // Offset of the symbol in the section
705 int64_t a = Layout.getSymbolAddress(&SDB) - Layout.getSectionAddress(Sec);
707 // Ofeset of the relocation in the section
708 int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset();
712 // Check that this case has already been fully resolved before we get
714 if (Symbol->isDefined() && !SD.isExternal() &&
716 &Fragment->getParent()->getSection() == &Symbol->getSection()) {
717 llvm_unreachable("We don't need a relocation in this case.");
721 bool RelocOnSymbol = ShouldRelocOnSymbol(SD, Target, *Fragment);
722 if (!RelocOnSymbol) {
723 Index = F->getParent()->getOrdinal();
725 MCSectionData *FSD = F->getParent();
726 // Offset of the symbol in the section
727 Value += Layout.getSymbolAddress(&SD) - Layout.getSectionAddress(FSD);
729 UsedInReloc.insert(Renamed);
733 // Compensate for the addend on i386.
740 // determine the type of the relocation
742 MCSymbolRefExpr::VariantKind Modifier = Target.getSymA()->getKind();
748 llvm_unreachable("Unimplemented");
749 case MCSymbolRefExpr::VK_None:
750 Type = ELF::R_X86_64_PC32;
752 case MCSymbolRefExpr::VK_PLT:
753 Type = ELF::R_X86_64_PLT32;
755 case MCSymbolRefExpr::VK_GOTPCREL:
756 Type = ELF::R_X86_64_GOTPCREL;
758 case MCSymbolRefExpr::VK_GOTTPOFF:
759 Type = ELF::R_X86_64_GOTTPOFF;
761 case MCSymbolRefExpr::VK_TLSGD:
762 Type = ELF::R_X86_64_TLSGD;
764 case MCSymbolRefExpr::VK_TLSLD:
765 Type = ELF::R_X86_64_TLSLD;
769 switch ((unsigned)Fixup.getKind()) {
770 default: llvm_unreachable("invalid fixup kind!");
771 case FK_Data_8: Type = ELF::R_X86_64_64; break;
772 case X86::reloc_signed_4byte:
773 case X86::reloc_pcrel_4byte:
774 assert(isInt<32>(Target.getConstant()));
777 llvm_unreachable("Unimplemented");
778 case MCSymbolRefExpr::VK_None:
779 Type = ELF::R_X86_64_32S;
781 case MCSymbolRefExpr::VK_GOT:
782 Type = ELF::R_X86_64_GOT32;
784 case MCSymbolRefExpr::VK_GOTPCREL:
785 Type = ELF::R_X86_64_GOTPCREL;
787 case MCSymbolRefExpr::VK_TPOFF:
788 Type = ELF::R_X86_64_TPOFF32;
790 case MCSymbolRefExpr::VK_DTPOFF:
791 Type = ELF::R_X86_64_DTPOFF32;
796 Type = ELF::R_X86_64_32;
798 case FK_Data_2: Type = ELF::R_X86_64_16; break;
799 case X86::reloc_pcrel_1byte:
800 case FK_Data_1: Type = ELF::R_X86_64_8; break;
807 llvm_unreachable("Unimplemented");
808 case MCSymbolRefExpr::VK_None:
809 Type = ELF::R_386_PC32;
811 case MCSymbolRefExpr::VK_PLT:
812 Type = ELF::R_386_PLT32;
816 switch ((unsigned)Fixup.getKind()) {
817 default: llvm_unreachable("invalid fixup kind!");
819 case X86::reloc_global_offset_table:
820 Type = ELF::R_386_GOTPC;
823 // FIXME: Should we avoid selecting reloc_signed_4byte in 32 bit mode
825 case X86::reloc_signed_4byte:
826 case X86::reloc_pcrel_4byte:
830 llvm_unreachable("Unimplemented");
831 case MCSymbolRefExpr::VK_None:
832 Type = ELF::R_386_32;
834 case MCSymbolRefExpr::VK_GOT:
835 Type = ELF::R_386_GOT32;
837 case MCSymbolRefExpr::VK_GOTOFF:
838 Type = ELF::R_386_GOTOFF;
840 case MCSymbolRefExpr::VK_TLSGD:
841 Type = ELF::R_386_TLS_GD;
843 case MCSymbolRefExpr::VK_TPOFF:
844 Type = ELF::R_386_TLS_LE_32;
846 case MCSymbolRefExpr::VK_INDNTPOFF:
847 Type = ELF::R_386_TLS_IE;
849 case MCSymbolRefExpr::VK_NTPOFF:
850 Type = ELF::R_386_TLS_LE;
852 case MCSymbolRefExpr::VK_GOTNTPOFF:
853 Type = ELF::R_386_TLS_GOTIE;
855 case MCSymbolRefExpr::VK_TLSLDM:
856 Type = ELF::R_386_TLS_LDM;
858 case MCSymbolRefExpr::VK_DTPOFF:
859 Type = ELF::R_386_TLS_LDO_32;
863 case FK_Data_2: Type = ELF::R_386_16; break;
864 case X86::reloc_pcrel_1byte:
865 case FK_Data_1: Type = ELF::R_386_8; break;
870 if (RelocNeedsGOT(Modifier))
873 ELFRelocationEntry ERE;
877 ERE.Symbol = Renamed;
879 ERE.r_offset = Layout.getFragmentOffset(Fragment) + Fixup.getOffset();
881 if (HasRelocationAddend)
882 ERE.r_addend = Addend;
884 ERE.r_addend = 0; // Silence compiler warning.
886 Relocations[Fragment->getParent()].push_back(ERE);
890 ELFObjectWriterImpl::getSymbolIndexInSymbolTable(const MCAssembler &Asm,
892 MCSymbolData &SD = Asm.getSymbolData(*S);
895 if (!SD.isExternal() && !S->isUndefined())
896 return SD.getIndex() + /* empty symbol */ 1;
898 // External or undefined symbol.
899 return SD.getIndex() + NumRegularSections + /* empty symbol */ 1;
902 static bool isInSymtab(const MCAssembler &Asm, const MCSymbolData &Data,
903 bool Used, bool Renamed) {
910 const MCSymbol &Symbol = Data.getSymbol();
912 if (Symbol.getName() == "_GLOBAL_OFFSET_TABLE_")
915 const MCSymbol &A = AliasedSymbol(Symbol);
916 if (!A.isVariable() && A.isUndefined() && !Data.isCommon())
919 if (!Asm.isSymbolLinkerVisible(Symbol) && !Symbol.isUndefined())
922 if (Symbol.isTemporary())
928 static bool isLocal(const MCSymbolData &Data) {
929 if (Data.isExternal())
932 const MCSymbol &Symbol = Data.getSymbol();
933 if (Symbol.isUndefined() && !Symbol.isVariable())
939 void ELFObjectWriterImpl::ComputeSymbolTable(MCAssembler &Asm) {
940 // FIXME: Is this the correct place to do this?
942 llvm::StringRef Name = "_GLOBAL_OFFSET_TABLE_";
943 MCSymbol *Sym = Asm.getContext().GetOrCreateSymbol(Name);
944 MCSymbolData &Data = Asm.getOrCreateSymbolData(*Sym);
945 Data.setExternal(true);
946 SetBinding(Data, ELF::STB_GLOBAL);
949 // Build section lookup table.
950 NumRegularSections = Asm.size();
951 DenseMap<const MCSection*, uint32_t> SectionIndexMap;
953 for (MCAssembler::iterator it = Asm.begin(),
954 ie = Asm.end(); it != ie; ++it, ++Index)
955 SectionIndexMap[&it->getSection()] = Index;
957 // Index 0 is always the empty string.
958 StringMap<uint64_t> StringIndexMap;
959 StringTable += '\x00';
961 // Add the data for the symbols.
962 for (MCAssembler::symbol_iterator it = Asm.symbol_begin(),
963 ie = Asm.symbol_end(); it != ie; ++it) {
964 const MCSymbol &Symbol = it->getSymbol();
966 if (!isInSymtab(Asm, *it, UsedInReloc.count(&Symbol),
967 Renames.count(&Symbol)))
972 bool Local = isLocal(*it);
973 const MCSymbol &RefSymbol = AliasedSymbol(Symbol);
975 if (it->isCommon()) {
977 MSD.SectionIndex = ELF::SHN_COMMON;
978 } else if (Symbol.isAbsolute() || RefSymbol.isVariable()) {
979 MSD.SectionIndex = ELF::SHN_ABS;
980 } else if (RefSymbol.isUndefined()) {
981 MSD.SectionIndex = ELF::SHN_UNDEF;
983 MSD.SectionIndex = SectionIndexMap.lookup(&RefSymbol.getSection());
984 if (MSD.SectionIndex >= ELF::SHN_LORESERVE)
985 NeedsSymtabShndx = true;
986 assert(MSD.SectionIndex && "Invalid section index!");
989 // The @@@ in symbol version is replaced with @ in undefined symbols and
990 // @@ in defined ones.
991 StringRef Name = Symbol.getName();
992 size_t Pos = Name.find("@@@");
993 std::string FinalName;
994 if (Pos != StringRef::npos) {
995 StringRef Prefix = Name.substr(0, Pos);
996 unsigned n = MSD.SectionIndex == ELF::SHN_UNDEF ? 2 : 1;
997 StringRef Suffix = Name.substr(Pos + n);
998 FinalName = Prefix.str() + Suffix.str();
1000 FinalName = Name.str();
1003 uint64_t &Entry = StringIndexMap[FinalName];
1005 Entry = StringTable.size();
1006 StringTable += FinalName;
1007 StringTable += '\x00';
1009 MSD.StringIndex = Entry;
1010 if (MSD.SectionIndex == ELF::SHN_UNDEF)
1011 UndefinedSymbolData.push_back(MSD);
1013 LocalSymbolData.push_back(MSD);
1015 ExternalSymbolData.push_back(MSD);
1018 // Symbols are required to be in lexicographic order.
1019 array_pod_sort(LocalSymbolData.begin(), LocalSymbolData.end());
1020 array_pod_sort(ExternalSymbolData.begin(), ExternalSymbolData.end());
1021 array_pod_sort(UndefinedSymbolData.begin(), UndefinedSymbolData.end());
1023 // Set the symbol indices. Local symbols must come before all other
1024 // symbols with non-local bindings.
1026 for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i)
1027 LocalSymbolData[i].SymbolData->setIndex(Index++);
1028 for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i)
1029 ExternalSymbolData[i].SymbolData->setIndex(Index++);
1030 for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i)
1031 UndefinedSymbolData[i].SymbolData->setIndex(Index++);
1034 void ELFObjectWriterImpl::WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout,
1035 const MCSectionData &SD) {
1036 if (!Relocations[&SD].empty()) {
1037 MCContext &Ctx = Asm.getContext();
1038 const MCSection *RelaSection;
1039 const MCSectionELF &Section =
1040 static_cast<const MCSectionELF&>(SD.getSection());
1042 const StringRef SectionName = Section.getSectionName();
1043 std::string RelaSectionName = HasRelocationAddend ? ".rela" : ".rel";
1044 RelaSectionName += SectionName;
1047 if (HasRelocationAddend)
1048 EntrySize = Is64Bit ? sizeof(ELF::Elf64_Rela) : sizeof(ELF::Elf32_Rela);
1050 EntrySize = Is64Bit ? sizeof(ELF::Elf64_Rel) : sizeof(ELF::Elf32_Rel);
1052 RelaSection = Ctx.getELFSection(RelaSectionName, HasRelocationAddend ?
1053 ELF::SHT_RELA : ELF::SHT_REL, 0,
1054 SectionKind::getReadOnly(),
1057 MCSectionData &RelaSD = Asm.getOrCreateSectionData(*RelaSection);
1058 RelaSD.setAlignment(Is64Bit ? 8 : 4);
1060 MCDataFragment *F = new MCDataFragment(&RelaSD);
1062 WriteRelocationsFragment(Asm, F, &SD);
1064 Asm.AddSectionToTheEnd(*Writer, RelaSD, Layout);
1068 void ELFObjectWriterImpl::WriteSecHdrEntry(uint32_t Name, uint32_t Type,
1069 uint64_t Flags, uint64_t Address,
1070 uint64_t Offset, uint64_t Size,
1071 uint32_t Link, uint32_t Info,
1073 uint64_t EntrySize) {
1074 Write32(Name); // sh_name: index into string table
1075 Write32(Type); // sh_type
1076 WriteWord(Flags); // sh_flags
1077 WriteWord(Address); // sh_addr
1078 WriteWord(Offset); // sh_offset
1079 WriteWord(Size); // sh_size
1080 Write32(Link); // sh_link
1081 Write32(Info); // sh_info
1082 WriteWord(Alignment); // sh_addralign
1083 WriteWord(EntrySize); // sh_entsize
1086 void ELFObjectWriterImpl::WriteRelocationsFragment(const MCAssembler &Asm,
1088 const MCSectionData *SD) {
1089 std::vector<ELFRelocationEntry> &Relocs = Relocations[SD];
1090 // sort by the r_offset just like gnu as does
1091 array_pod_sort(Relocs.begin(), Relocs.end());
1093 for (unsigned i = 0, e = Relocs.size(); i != e; ++i) {
1094 ELFRelocationEntry entry = Relocs[e - i - 1];
1096 if (entry.Index < 0)
1097 entry.Index = getSymbolIndexInSymbolTable(Asm, entry.Symbol);
1099 entry.Index += LocalSymbolData.size() + 1;
1103 String64(buf, entry.r_offset);
1104 F->getContents() += StringRef(buf, 8);
1106 struct ELF::Elf64_Rela ERE64;
1107 ERE64.setSymbolAndType(entry.Index, entry.Type);
1108 String64(buf, ERE64.r_info);
1109 F->getContents() += StringRef(buf, 8);
1111 if (HasRelocationAddend) {
1112 String64(buf, entry.r_addend);
1113 F->getContents() += StringRef(buf, 8);
1118 String32(buf, entry.r_offset);
1119 F->getContents() += StringRef(buf, 4);
1121 struct ELF::Elf32_Rela ERE32;
1122 ERE32.setSymbolAndType(entry.Index, entry.Type);
1123 String32(buf, ERE32.r_info);
1124 F->getContents() += StringRef(buf, 4);
1126 if (HasRelocationAddend) {
1127 String32(buf, entry.r_addend);
1128 F->getContents() += StringRef(buf, 4);
1134 void ELFObjectWriterImpl::CreateMetadataSections(MCAssembler &Asm,
1135 MCAsmLayout &Layout) {
1136 MCContext &Ctx = Asm.getContext();
1139 unsigned EntrySize = Is64Bit ? ELF::SYMENTRY_SIZE64 : ELF::SYMENTRY_SIZE32;
1141 unsigned NumRegularSections = Asm.size();
1143 // We construct .shstrtab, .symtab and .strtab in this order to match gnu as.
1144 const MCSection *ShstrtabSection =
1145 Ctx.getELFSection(".shstrtab", ELF::SHT_STRTAB, 0,
1146 SectionKind::getReadOnly(), false);
1147 MCSectionData &ShstrtabSD = Asm.getOrCreateSectionData(*ShstrtabSection);
1148 ShstrtabSD.setAlignment(1);
1149 ShstrtabIndex = Asm.size();
1151 const MCSection *SymtabSection =
1152 Ctx.getELFSection(".symtab", ELF::SHT_SYMTAB, 0,
1153 SectionKind::getReadOnly(),
1155 MCSectionData &SymtabSD = Asm.getOrCreateSectionData(*SymtabSection);
1156 SymtabSD.setAlignment(Is64Bit ? 8 : 4);
1157 SymbolTableIndex = Asm.size();
1159 MCSectionData *SymtabShndxSD = NULL;
1161 if (NeedsSymtabShndx) {
1162 const MCSection *SymtabShndxSection =
1163 Ctx.getELFSection(".symtab_shndx", ELF::SHT_SYMTAB_SHNDX, 0,
1164 SectionKind::getReadOnly(), false, 4);
1165 SymtabShndxSD = &Asm.getOrCreateSectionData(*SymtabShndxSection);
1166 SymtabShndxSD->setAlignment(4);
1169 const MCSection *StrtabSection;
1170 StrtabSection = Ctx.getELFSection(".strtab", ELF::SHT_STRTAB, 0,
1171 SectionKind::getReadOnly(), false);
1172 MCSectionData &StrtabSD = Asm.getOrCreateSectionData(*StrtabSection);
1173 StrtabSD.setAlignment(1);
1174 StringTableIndex = Asm.size();
1176 WriteRelocations(Asm, Layout);
1179 F = new MCDataFragment(&SymtabSD);
1180 MCDataFragment *ShndxF = NULL;
1181 if (NeedsSymtabShndx) {
1182 ShndxF = new MCDataFragment(SymtabShndxSD);
1183 Asm.AddSectionToTheEnd(*Writer, *SymtabShndxSD, Layout);
1185 WriteSymbolTable(F, ShndxF, Asm, Layout, NumRegularSections);
1186 Asm.AddSectionToTheEnd(*Writer, SymtabSD, Layout);
1188 F = new MCDataFragment(&StrtabSD);
1189 F->getContents().append(StringTable.begin(), StringTable.end());
1190 Asm.AddSectionToTheEnd(*Writer, StrtabSD, Layout);
1192 F = new MCDataFragment(&ShstrtabSD);
1194 // Section header string table.
1196 // The first entry of a string table holds a null character so skip
1199 F->getContents() += '\x00';
1201 for (MCAssembler::const_iterator it = Asm.begin(),
1202 ie = Asm.end(); it != ie; ++it) {
1203 const MCSectionELF &Section =
1204 static_cast<const MCSectionELF&>(it->getSection());
1205 // FIXME: We could merge suffixes like in .text and .rela.text.
1207 // Remember the index into the string table so we can write it
1208 // into the sh_name field of the section header table.
1209 SectionStringTableIndex[&it->getSection()] = Index;
1211 Index += Section.getSectionName().size() + 1;
1212 F->getContents() += Section.getSectionName();
1213 F->getContents() += '\x00';
1216 Asm.AddSectionToTheEnd(*Writer, ShstrtabSD, Layout);
1219 bool ELFObjectWriterImpl::IsFixupFullyResolved(const MCAssembler &Asm,
1220 const MCValue Target,
1222 const MCFragment *DF) const {
1223 // If this is a PCrel relocation, find the section this fixup value is
1225 const MCSection *BaseSection = 0;
1227 BaseSection = &DF->getParent()->getSection();
1228 assert(BaseSection);
1231 const MCSection *SectionA = 0;
1232 const MCSymbol *SymbolA = 0;
1233 if (const MCSymbolRefExpr *A = Target.getSymA()) {
1234 SymbolA = &A->getSymbol();
1235 SectionA = &SymbolA->getSection();
1238 const MCSection *SectionB = 0;
1239 if (const MCSymbolRefExpr *B = Target.getSymB()) {
1240 SectionB = &B->getSymbol().getSection();
1244 return SectionA == SectionB;
1246 const MCSymbolData &DataA = Asm.getSymbolData(*SymbolA);
1247 if (DataA.isExternal())
1250 return !SectionB && BaseSection == SectionA;
1253 void ELFObjectWriterImpl::WriteObject(MCAssembler &Asm,
1254 const MCAsmLayout &Layout) {
1255 // Compute symbol table information.
1256 ComputeSymbolTable(Asm);
1258 CreateMetadataSections(const_cast<MCAssembler&>(Asm),
1259 const_cast<MCAsmLayout&>(Layout));
1261 // Add 1 for the null section.
1262 unsigned NumSections = Asm.size() + 1;
1263 uint64_t NaturalAlignment = Is64Bit ? 8 : 4;
1264 uint64_t HeaderSize = Is64Bit ? sizeof(ELF::Elf64_Ehdr) : sizeof(ELF::Elf32_Ehdr);
1265 uint64_t FileOff = HeaderSize;
1267 for (MCAssembler::const_iterator it = Asm.begin(),
1268 ie = Asm.end(); it != ie; ++it) {
1269 const MCSectionData &SD = *it;
1271 FileOff = RoundUpToAlignment(FileOff, SD.getAlignment());
1273 // Get the size of the section in the output file (including padding).
1274 uint64_t Size = Layout.getSectionFileSize(&SD);
1279 FileOff = RoundUpToAlignment(FileOff, NaturalAlignment);
1281 // Write out the ELF header ...
1282 WriteHeader(FileOff - HeaderSize, NumSections);
1284 FileOff = HeaderSize;
1286 // ... then all of the sections ...
1287 DenseMap<const MCSection*, uint64_t> SectionOffsetMap;
1289 DenseMap<const MCSection*, uint32_t> SectionIndexMap;
1292 for (MCAssembler::const_iterator it = Asm.begin(),
1293 ie = Asm.end(); it != ie; ++it) {
1294 const MCSectionData &SD = *it;
1296 uint64_t Padding = OffsetToAlignment(FileOff, SD.getAlignment());
1297 WriteZeros(Padding);
1300 // Remember the offset into the file for this section.
1301 SectionOffsetMap[&it->getSection()] = FileOff;
1302 SectionIndexMap[&it->getSection()] = Index++;
1304 FileOff += Layout.getSectionFileSize(&SD);
1306 Asm.WriteSectionData(it, Layout, Writer);
1309 uint64_t Padding = OffsetToAlignment(FileOff, NaturalAlignment);
1310 WriteZeros(Padding);
1313 // ... and then the section header table.
1314 // Should we align the section header table?
1316 // Null section first.
1317 uint64_t FirstSectionSize =
1318 NumSections >= ELF::SHN_LORESERVE ? NumSections : 0;
1319 uint32_t FirstSectionLink =
1320 ShstrtabIndex >= ELF::SHN_LORESERVE ? ShstrtabIndex : 0;
1321 WriteSecHdrEntry(0, 0, 0, 0, 0, FirstSectionSize, FirstSectionLink, 0, 0, 0);
1323 for (MCAssembler::const_iterator it = Asm.begin(),
1324 ie = Asm.end(); it != ie; ++it) {
1325 const MCSectionData &SD = *it;
1326 const MCSectionELF &Section =
1327 static_cast<const MCSectionELF&>(SD.getSection());
1329 uint64_t sh_link = 0;
1330 uint64_t sh_info = 0;
1332 switch(Section.getType()) {
1333 case ELF::SHT_DYNAMIC:
1334 sh_link = SectionStringTableIndex[&it->getSection()];
1339 case ELF::SHT_RELA: {
1340 const MCSection *SymtabSection;
1341 const MCSection *InfoSection;
1343 SymtabSection = Asm.getContext().getELFSection(".symtab", ELF::SHT_SYMTAB, 0,
1344 SectionKind::getReadOnly(),
1346 sh_link = SectionIndexMap[SymtabSection];
1348 // Remove ".rel" and ".rela" prefixes.
1349 unsigned SecNameLen = (Section.getType() == ELF::SHT_REL) ? 4 : 5;
1350 StringRef SectionName = Section.getSectionName().substr(SecNameLen);
1352 InfoSection = Asm.getContext().getELFSection(SectionName,
1353 ELF::SHT_PROGBITS, 0,
1354 SectionKind::getReadOnly(),
1356 sh_info = SectionIndexMap[InfoSection];
1360 case ELF::SHT_SYMTAB:
1361 case ELF::SHT_DYNSYM:
1362 sh_link = StringTableIndex;
1363 sh_info = LastLocalSymbolIndex;
1366 case ELF::SHT_SYMTAB_SHNDX:
1367 sh_link = SymbolTableIndex;
1370 case ELF::SHT_PROGBITS:
1371 case ELF::SHT_STRTAB:
1372 case ELF::SHT_NOBITS:
1374 case ELF::SHT_ARM_ATTRIBUTES:
1379 assert(0 && "FIXME: sh_type value not supported!");
1383 WriteSecHdrEntry(SectionStringTableIndex[&it->getSection()],
1384 Section.getType(), Section.getFlags(),
1386 SectionOffsetMap.lookup(&SD.getSection()),
1387 Layout.getSectionSize(&SD), sh_link,
1388 sh_info, SD.getAlignment(),
1389 Section.getEntrySize());
1393 ELFObjectWriter::ELFObjectWriter(raw_ostream &OS,
1395 Triple::OSType OSType,
1397 bool IsLittleEndian,
1398 bool HasRelocationAddend)
1399 : MCObjectWriter(OS, IsLittleEndian)
1401 Impl = new ELFObjectWriterImpl(this, Is64Bit, EMachine,
1402 HasRelocationAddend, OSType);
1405 ELFObjectWriter::~ELFObjectWriter() {
1406 delete (ELFObjectWriterImpl*) Impl;
1409 void ELFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm) {
1410 ((ELFObjectWriterImpl*) Impl)->ExecutePostLayoutBinding(Asm);
1413 void ELFObjectWriter::RecordRelocation(const MCAssembler &Asm,
1414 const MCAsmLayout &Layout,
1415 const MCFragment *Fragment,
1416 const MCFixup &Fixup, MCValue Target,
1417 uint64_t &FixedValue) {
1418 ((ELFObjectWriterImpl*) Impl)->RecordRelocation(Asm, Layout, Fragment, Fixup,
1419 Target, FixedValue);
1422 bool ELFObjectWriter::IsFixupFullyResolved(const MCAssembler &Asm,
1423 const MCValue Target,
1425 const MCFragment *DF) const {
1426 return ((ELFObjectWriterImpl*) Impl)->IsFixupFullyResolved(Asm, Target,
1430 void ELFObjectWriter::WriteObject(MCAssembler &Asm,
1431 const MCAsmLayout &Layout) {
1432 ((ELFObjectWriterImpl*) Impl)->WriteObject(Asm, Layout);