diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCELFStreamer.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCELFStreamer.cpp | 625 |
1 files changed, 625 insertions, 0 deletions
diff --git a/contrib/llvm/lib/MC/MCELFStreamer.cpp b/contrib/llvm/lib/MC/MCELFStreamer.cpp new file mode 100644 index 0000000..e806cb9 --- /dev/null +++ b/contrib/llvm/lib/MC/MCELFStreamer.cpp @@ -0,0 +1,625 @@ +//===- lib/MC/MCELFStreamer.cpp - ELF Object Output -----------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file assembles .s files and emits ELF .o object files. +// +//===----------------------------------------------------------------------===// + +#include "llvm/MC/MCELFStreamer.h" +#include "llvm/ADT/SmallPtrSet.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/MC/MCAssembler.h" +#include "llvm/MC/MCAsmBackend.h" +#include "llvm/MC/MCCodeEmitter.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCELF.h" +#include "llvm/MC/MCELFSymbolFlags.h" +#include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCInst.h" +#include "llvm/MC/MCObjectStreamer.h" +#include "llvm/MC/MCSection.h" +#include "llvm/MC/MCSectionELF.h" +#include "llvm/MC/MCSymbol.h" +#include "llvm/MC/MCValue.h" +#include "llvm/Support/Debug.h" +#include "llvm/Support/ELF.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/raw_ostream.h" + +using namespace llvm; + + +inline void MCELFStreamer::SetSection(StringRef Section, unsigned Type, + unsigned Flags, SectionKind Kind) { + SwitchSection(getContext().getELFSection(Section, Type, Flags, Kind)); +} + +inline void MCELFStreamer::SetSectionData() { + SetSection(".data", + ELF::SHT_PROGBITS, + ELF::SHF_WRITE | ELF::SHF_ALLOC, + SectionKind::getDataRel()); + EmitCodeAlignment(4, 0); +} + +inline void MCELFStreamer::SetSectionText() { + SetSection(".text", + ELF::SHT_PROGBITS, + ELF::SHF_EXECINSTR | ELF::SHF_ALLOC, + SectionKind::getText()); + EmitCodeAlignment(4, 0); +} + +inline void MCELFStreamer::SetSectionBss() { + SetSection(".bss", + ELF::SHT_NOBITS, + ELF::SHF_WRITE | ELF::SHF_ALLOC, + SectionKind::getBSS()); + EmitCodeAlignment(4, 0); +} + +MCELFStreamer::~MCELFStreamer() { +} + +void MCELFStreamer::InitToTextSection() { + SetSectionText(); +} + +void MCELFStreamer::InitSections() { + // This emulates the same behavior of GNU as. This makes it easier + // to compare the output as the major sections are in the same order. + SetSectionText(); + SetSectionData(); + SetSectionBss(); + SetSectionText(); +} + +void MCELFStreamer::EmitLabel(MCSymbol *Symbol) { + assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); + + MCObjectStreamer::EmitLabel(Symbol); + + const MCSectionELF &Section = + static_cast<const MCSectionELF&>(Symbol->getSection()); + MCSymbolData &SD = getAssembler().getSymbolData(*Symbol); + if (Section.getFlags() & ELF::SHF_TLS) + MCELF::SetType(SD, ELF::STT_TLS); +} + +void MCELFStreamer::EmitDebugLabel(MCSymbol *Symbol) { + EmitLabel(Symbol); +} + +void MCELFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) { + // Let the target do whatever target specific stuff it needs to do. + getAssembler().getBackend().handleAssemblerFlag(Flag); + // Do any generic stuff we need to do. + switch (Flag) { + case MCAF_SyntaxUnified: return; // no-op here. + case MCAF_Code16: return; // Change parsing mode; no-op here. + case MCAF_Code32: return; // Change parsing mode; no-op here. + case MCAF_Code64: return; // Change parsing mode; no-op here. + case MCAF_SubsectionsViaSymbols: + getAssembler().setSubsectionsViaSymbols(true); + return; + } + + llvm_unreachable("invalid assembler flag!"); +} + +void MCELFStreamer::ChangeSection(const MCSection *Section, + const MCExpr *Subsection) { + MCSectionData *CurSection = getCurrentSectionData(); + if (CurSection && CurSection->isBundleLocked()) + report_fatal_error("Unterminated .bundle_lock when changing a section"); + const MCSymbol *Grp = static_cast<const MCSectionELF *>(Section)->getGroup(); + if (Grp) + getAssembler().getOrCreateSymbolData(*Grp); + this->MCObjectStreamer::ChangeSection(Section, Subsection); +} + +void MCELFStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) { + getAssembler().getOrCreateSymbolData(*Symbol); + MCSymbolData &AliasSD = getAssembler().getOrCreateSymbolData(*Alias); + AliasSD.setFlags(AliasSD.getFlags() | ELF_Other_Weakref); + const MCExpr *Value = MCSymbolRefExpr::Create(Symbol, getContext()); + Alias->setVariableValue(Value); +} + +// When GNU as encounters more than one .type declaration for an object it seems +// to use a mechanism similar to the one below to decide which type is actually +// used in the object file. The greater of T1 and T2 is selected based on the +// following ordering: +// STT_NOTYPE < STT_OBJECT < STT_FUNC < STT_GNU_IFUNC < STT_TLS < anything else +// If neither T1 < T2 nor T2 < T1 according to this ordering, use T2 (the user +// provided type). +static unsigned CombineSymbolTypes(unsigned T1, unsigned T2) { + unsigned TypeOrdering[] = {ELF::STT_NOTYPE, ELF::STT_OBJECT, ELF::STT_FUNC, + ELF::STT_GNU_IFUNC, ELF::STT_TLS}; + for (unsigned i = 0; i != array_lengthof(TypeOrdering); ++i) { + if (T1 == TypeOrdering[i]) + return T2; + if (T2 == TypeOrdering[i]) + return T1; + } + + return T2; +} + +bool MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol, + MCSymbolAttr Attribute) { + // Indirect symbols are handled differently, to match how 'as' handles + // them. This makes writing matching .o files easier. + if (Attribute == MCSA_IndirectSymbol) { + // Note that we intentionally cannot use the symbol data here; this is + // important for matching the string table that 'as' generates. + IndirectSymbolData ISD; + ISD.Symbol = Symbol; + ISD.SectionData = getCurrentSectionData(); + getAssembler().getIndirectSymbols().push_back(ISD); + return true; + } + + // Adding a symbol attribute always introduces the symbol, note that an + // important side effect of calling getOrCreateSymbolData here is to register + // the symbol with the assembler. + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); + + // The implementation of symbol attributes is designed to match 'as', but it + // leaves much to desired. It doesn't really make sense to arbitrarily add and + // remove flags, but 'as' allows this (in particular, see .desc). + // + // In the future it might be worth trying to make these operations more well + // defined. + switch (Attribute) { + case MCSA_LazyReference: + case MCSA_Reference: + case MCSA_SymbolResolver: + case MCSA_PrivateExtern: + case MCSA_WeakDefinition: + case MCSA_WeakDefAutoPrivate: + case MCSA_Invalid: + case MCSA_IndirectSymbol: + return false; + + case MCSA_NoDeadStrip: + case MCSA_ELF_TypeGnuUniqueObject: + // Ignore for now. + break; + + case MCSA_Global: + MCELF::SetBinding(SD, ELF::STB_GLOBAL); + SD.setExternal(true); + BindingExplicitlySet.insert(Symbol); + break; + + case MCSA_WeakReference: + case MCSA_Weak: + MCELF::SetBinding(SD, ELF::STB_WEAK); + SD.setExternal(true); + BindingExplicitlySet.insert(Symbol); + break; + + case MCSA_Local: + MCELF::SetBinding(SD, ELF::STB_LOCAL); + SD.setExternal(false); + BindingExplicitlySet.insert(Symbol); + break; + + case MCSA_ELF_TypeFunction: + MCELF::SetType(SD, CombineSymbolTypes(MCELF::GetType(SD), + ELF::STT_FUNC)); + break; + + case MCSA_ELF_TypeIndFunction: + MCELF::SetType(SD, CombineSymbolTypes(MCELF::GetType(SD), + ELF::STT_GNU_IFUNC)); + break; + + case MCSA_ELF_TypeObject: + MCELF::SetType(SD, CombineSymbolTypes(MCELF::GetType(SD), + ELF::STT_OBJECT)); + break; + + case MCSA_ELF_TypeTLS: + MCELF::SetType(SD, CombineSymbolTypes(MCELF::GetType(SD), + ELF::STT_TLS)); + break; + + case MCSA_ELF_TypeCommon: + // TODO: Emit these as a common symbol. + MCELF::SetType(SD, CombineSymbolTypes(MCELF::GetType(SD), + ELF::STT_OBJECT)); + break; + + case MCSA_ELF_TypeNoType: + MCELF::SetType(SD, CombineSymbolTypes(MCELF::GetType(SD), + ELF::STT_NOTYPE)); + break; + + case MCSA_Protected: + MCELF::SetVisibility(SD, ELF::STV_PROTECTED); + break; + + case MCSA_Hidden: + MCELF::SetVisibility(SD, ELF::STV_HIDDEN); + break; + + case MCSA_Internal: + MCELF::SetVisibility(SD, ELF::STV_INTERNAL); + break; + } + + return true; +} + +void MCELFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) { + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); + + if (!BindingExplicitlySet.count(Symbol)) { + MCELF::SetBinding(SD, ELF::STB_GLOBAL); + SD.setExternal(true); + } + + MCELF::SetType(SD, ELF::STT_OBJECT); + + if (MCELF::GetBinding(SD) == ELF_STB_Local) { + const MCSection *Section = getAssembler().getContext().getELFSection(".bss", + ELF::SHT_NOBITS, + ELF::SHF_WRITE | + ELF::SHF_ALLOC, + SectionKind::getBSS()); + + AssignSection(Symbol, Section); + + struct LocalCommon L = {&SD, Size, ByteAlignment}; + LocalCommons.push_back(L); + } else { + SD.setCommon(Size, ByteAlignment); + } + + SD.setSize(MCConstantExpr::Create(Size, getContext())); +} + +void MCELFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) { + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); + SD.setSize(Value); +} + +void MCELFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) { + // FIXME: Should this be caught and done earlier? + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); + MCELF::SetBinding(SD, ELF::STB_LOCAL); + SD.setExternal(false); + BindingExplicitlySet.insert(Symbol); + EmitCommonSymbol(Symbol, Size, ByteAlignment); +} + +void MCELFStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size) { + if (getCurrentSectionData()->isBundleLocked()) + report_fatal_error("Emitting values inside a locked bundle is forbidden"); + fixSymbolsInTLSFixups(Value); + MCObjectStreamer::EmitValueImpl(Value, Size); +} + +void MCELFStreamer::EmitValueToAlignment(unsigned ByteAlignment, + int64_t Value, + unsigned ValueSize, + unsigned MaxBytesToEmit) { + if (getCurrentSectionData()->isBundleLocked()) + report_fatal_error("Emitting values inside a locked bundle is forbidden"); + MCObjectStreamer::EmitValueToAlignment(ByteAlignment, Value, + ValueSize, MaxBytesToEmit); +} + +// Add a symbol for the file name of this module. They start after the +// null symbol and don't count as normal symbol, i.e. a non-STT_FILE symbol +// with the same name may appear. +void MCELFStreamer::EmitFileDirective(StringRef Filename) { + getAssembler().addFileName(Filename); +} + +void MCELFStreamer::EmitIdent(StringRef IdentString) { + const MCSection *Comment = getAssembler().getContext().getELFSection( + ".comment", ELF::SHT_PROGBITS, ELF::SHF_MERGE | ELF::SHF_STRINGS, + SectionKind::getReadOnly(), 1, ""); + PushSection(); + SwitchSection(Comment); + if (!SeenIdent) { + EmitIntValue(0, 1); + SeenIdent = true; + } + EmitBytes(IdentString); + EmitIntValue(0, 1); + PopSection(); +} + +void MCELFStreamer::fixSymbolsInTLSFixups(const MCExpr *expr) { + switch (expr->getKind()) { + case MCExpr::Target: + cast<MCTargetExpr>(expr)->fixELFSymbolsInTLSFixups(getAssembler()); + break; + case MCExpr::Constant: + break; + + case MCExpr::Binary: { + const MCBinaryExpr *be = cast<MCBinaryExpr>(expr); + fixSymbolsInTLSFixups(be->getLHS()); + fixSymbolsInTLSFixups(be->getRHS()); + break; + } + + case MCExpr::SymbolRef: { + const MCSymbolRefExpr &symRef = *cast<MCSymbolRefExpr>(expr); + switch (symRef.getKind()) { + default: + return; + case MCSymbolRefExpr::VK_GOTTPOFF: + case MCSymbolRefExpr::VK_INDNTPOFF: + case MCSymbolRefExpr::VK_NTPOFF: + case MCSymbolRefExpr::VK_GOTNTPOFF: + case MCSymbolRefExpr::VK_TLSGD: + case MCSymbolRefExpr::VK_TLSLD: + case MCSymbolRefExpr::VK_TLSLDM: + case MCSymbolRefExpr::VK_TPOFF: + case MCSymbolRefExpr::VK_DTPOFF: + case MCSymbolRefExpr::VK_ARM_TLSGD: + case MCSymbolRefExpr::VK_ARM_TPOFF: + case MCSymbolRefExpr::VK_ARM_GOTTPOFF: + case MCSymbolRefExpr::VK_Mips_TLSGD: + case MCSymbolRefExpr::VK_Mips_GOTTPREL: + case MCSymbolRefExpr::VK_Mips_TPREL_HI: + case MCSymbolRefExpr::VK_Mips_TPREL_LO: + case MCSymbolRefExpr::VK_PPC_DTPMOD: + case MCSymbolRefExpr::VK_PPC_TPREL: + case MCSymbolRefExpr::VK_PPC_TPREL_LO: + case MCSymbolRefExpr::VK_PPC_TPREL_HI: + case MCSymbolRefExpr::VK_PPC_TPREL_HA: + case MCSymbolRefExpr::VK_PPC_TPREL_HIGHER: + case MCSymbolRefExpr::VK_PPC_TPREL_HIGHERA: + case MCSymbolRefExpr::VK_PPC_TPREL_HIGHEST: + case MCSymbolRefExpr::VK_PPC_TPREL_HIGHESTA: + case MCSymbolRefExpr::VK_PPC_DTPREL: + case MCSymbolRefExpr::VK_PPC_DTPREL_LO: + case MCSymbolRefExpr::VK_PPC_DTPREL_HI: + case MCSymbolRefExpr::VK_PPC_DTPREL_HA: + case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHER: + case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHERA: + case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHEST: + case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHESTA: + case MCSymbolRefExpr::VK_PPC_GOT_TPREL: + case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO: + case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HI: + case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA: + case MCSymbolRefExpr::VK_PPC_GOT_DTPREL: + case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO: + case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HI: + case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HA: + case MCSymbolRefExpr::VK_PPC_TLS: + case MCSymbolRefExpr::VK_PPC_GOT_TLSGD: + case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO: + case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HI: + case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA: + case MCSymbolRefExpr::VK_PPC_TLSGD: + case MCSymbolRefExpr::VK_PPC_GOT_TLSLD: + case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO: + case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HI: + case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA: + case MCSymbolRefExpr::VK_PPC_TLSLD: + break; + } + MCSymbolData &SD = getAssembler().getOrCreateSymbolData(symRef.getSymbol()); + MCELF::SetType(SD, ELF::STT_TLS); + break; + } + + case MCExpr::Unary: + fixSymbolsInTLSFixups(cast<MCUnaryExpr>(expr)->getSubExpr()); + break; + } +} + +void MCELFStreamer::EmitInstToFragment(const MCInst &Inst) { + this->MCObjectStreamer::EmitInstToFragment(Inst); + MCRelaxableFragment &F = *cast<MCRelaxableFragment>(getCurrentFragment()); + + for (unsigned i = 0, e = F.getFixups().size(); i != e; ++i) + fixSymbolsInTLSFixups(F.getFixups()[i].getValue()); +} + +void MCELFStreamer::EmitInstToData(const MCInst &Inst) { + MCAssembler &Assembler = getAssembler(); + SmallVector<MCFixup, 4> Fixups; + SmallString<256> Code; + raw_svector_ostream VecOS(Code); + Assembler.getEmitter().EncodeInstruction(Inst, VecOS, Fixups); + VecOS.flush(); + + for (unsigned i = 0, e = Fixups.size(); i != e; ++i) + fixSymbolsInTLSFixups(Fixups[i].getValue()); + + // There are several possibilities here: + // + // If bundling is disabled, append the encoded instruction to the current data + // fragment (or create a new such fragment if the current fragment is not a + // data fragment). + // + // If bundling is enabled: + // - If we're not in a bundle-locked group, emit the instruction into a + // fragment of its own. If there are no fixups registered for the + // instruction, emit a MCCompactEncodedInstFragment. Otherwise, emit a + // MCDataFragment. + // - If we're in a bundle-locked group, append the instruction to the current + // data fragment because we want all the instructions in a group to get into + // the same fragment. Be careful not to do that for the first instruction in + // the group, though. + MCDataFragment *DF; + + if (Assembler.isBundlingEnabled()) { + MCSectionData *SD = getCurrentSectionData(); + if (SD->isBundleLocked() && !SD->isBundleGroupBeforeFirstInst()) + // If we are bundle-locked, we re-use the current fragment. + // The bundle-locking directive ensures this is a new data fragment. + DF = cast<MCDataFragment>(getCurrentFragment()); + else if (!SD->isBundleLocked() && Fixups.size() == 0) { + // Optimize memory usage by emitting the instruction to a + // MCCompactEncodedInstFragment when not in a bundle-locked group and + // there are no fixups registered. + MCCompactEncodedInstFragment *CEIF = new MCCompactEncodedInstFragment(); + insert(CEIF); + CEIF->getContents().append(Code.begin(), Code.end()); + return; + } else { + DF = new MCDataFragment(); + insert(DF); + if (SD->getBundleLockState() == MCSectionData::BundleLockedAlignToEnd) { + // If this is a new fragment created for a bundle-locked group, and the + // group was marked as "align_to_end", set a flag in the fragment. + DF->setAlignToBundleEnd(true); + } + } + + // We're now emitting an instruction in a bundle group, so this flag has + // to be turned off. + SD->setBundleGroupBeforeFirstInst(false); + } else { + DF = getOrCreateDataFragment(); + } + + // Add the fixups and data. + for (unsigned i = 0, e = Fixups.size(); i != e; ++i) { + Fixups[i].setOffset(Fixups[i].getOffset() + DF->getContents().size()); + DF->getFixups().push_back(Fixups[i]); + } + DF->setHasInstructions(true); + DF->getContents().append(Code.begin(), Code.end()); +} + +void MCELFStreamer::EmitBundleAlignMode(unsigned AlignPow2) { + assert(AlignPow2 <= 30 && "Invalid bundle alignment"); + MCAssembler &Assembler = getAssembler(); + if (Assembler.getBundleAlignSize() == 0 && AlignPow2 > 0) + Assembler.setBundleAlignSize(1 << AlignPow2); + else + report_fatal_error(".bundle_align_mode should be only set once per file"); +} + +void MCELFStreamer::EmitBundleLock(bool AlignToEnd) { + MCSectionData *SD = getCurrentSectionData(); + + // Sanity checks + // + if (!getAssembler().isBundlingEnabled()) + report_fatal_error(".bundle_lock forbidden when bundling is disabled"); + else if (SD->isBundleLocked()) + report_fatal_error("Nesting of .bundle_lock is forbidden"); + + SD->setBundleLockState(AlignToEnd ? MCSectionData::BundleLockedAlignToEnd : + MCSectionData::BundleLocked); + SD->setBundleGroupBeforeFirstInst(true); +} + +void MCELFStreamer::EmitBundleUnlock() { + MCSectionData *SD = getCurrentSectionData(); + + // Sanity checks + if (!getAssembler().isBundlingEnabled()) + report_fatal_error(".bundle_unlock forbidden when bundling is disabled"); + else if (!SD->isBundleLocked()) + report_fatal_error(".bundle_unlock without matching lock"); + else if (SD->isBundleGroupBeforeFirstInst()) + report_fatal_error("Empty bundle-locked group is forbidden"); + + SD->setBundleLockState(MCSectionData::NotBundleLocked); +} + +void MCELFStreamer::Flush() { + for (std::vector<LocalCommon>::const_iterator i = LocalCommons.begin(), + e = LocalCommons.end(); + i != e; ++i) { + MCSymbolData *SD = i->SD; + uint64_t Size = i->Size; + unsigned ByteAlignment = i->ByteAlignment; + const MCSymbol &Symbol = SD->getSymbol(); + const MCSection &Section = Symbol.getSection(); + + MCSectionData &SectData = getAssembler().getOrCreateSectionData(Section); + new MCAlignFragment(ByteAlignment, 0, 1, ByteAlignment, &SectData); + + MCFragment *F = new MCFillFragment(0, 0, Size, &SectData); + SD->setFragment(F); + + // Update the maximum alignment of the section if necessary. + if (ByteAlignment > SectData.getAlignment()) + SectData.setAlignment(ByteAlignment); + } + + LocalCommons.clear(); +} + +void MCELFStreamer::FinishImpl() { + EmitFrames(NULL, true); + + Flush(); + + this->MCObjectStreamer::FinishImpl(); +} + +MCStreamer *llvm::createELFStreamer(MCContext &Context, + MCTargetStreamer *Streamer, + MCAsmBackend &MAB, raw_ostream &OS, + MCCodeEmitter *CE, bool RelaxAll, + bool NoExecStack) { + MCELFStreamer *S = new MCELFStreamer(Context, Streamer, MAB, OS, CE); + if (RelaxAll) + S->getAssembler().setRelaxAll(true); + if (NoExecStack) + S->getAssembler().setNoExecStack(true); + return S; +} + +void MCELFStreamer::EmitThumbFunc(MCSymbol *Func) { + llvm_unreachable("Generic ELF doesn't support this directive"); +} + +MCSymbolData &MCELFStreamer::getOrCreateSymbolData(MCSymbol *Symbol) { + return getAssembler().getOrCreateSymbolData(*Symbol); +} + +void MCELFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) { + llvm_unreachable("ELF doesn't support this directive"); +} + +void MCELFStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) { + llvm_unreachable("ELF doesn't support this directive"); +} + +void MCELFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) { + llvm_unreachable("ELF doesn't support this directive"); +} + +void MCELFStreamer::EmitCOFFSymbolType(int Type) { + llvm_unreachable("ELF doesn't support this directive"); +} + +void MCELFStreamer::EndCOFFSymbolDef() { + llvm_unreachable("ELF doesn't support this directive"); +} + +void MCELFStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol, + uint64_t Size, unsigned ByteAlignment) { + llvm_unreachable("ELF doesn't support this directive"); +} + +void MCELFStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, + uint64_t Size, unsigned ByteAlignment) { + llvm_unreachable("ELF doesn't support this directive"); +} |
