| //===- MCELFStreamer.h - MCStreamer ELF Object File Interface ---*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCELFSTREAMER_H |
| #define LLVM_MC_MCELFSTREAMER_H |
| |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/MC/MCDirectives.h" |
| #include "llvm/MC/MCObjectStreamer.h" |
| |
| namespace llvm { |
| |
| class MCAsmBackend; |
| class MCCodeEmitter; |
| class MCExpr; |
| class MCInst; |
| |
| class MCELFStreamer : public MCObjectStreamer { |
| public: |
| MCELFStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB, |
| std::unique_ptr<MCObjectWriter> OW, |
| std::unique_ptr<MCCodeEmitter> Emitter); |
| |
| ~MCELFStreamer() override = default; |
| |
| /// state management |
| void reset() override { |
| SeenIdent = false; |
| BundleGroups.clear(); |
| MCObjectStreamer::reset(); |
| } |
| |
| /// \name MCStreamer Interface |
| /// @{ |
| |
| void InitSections(bool NoExecStack) override; |
| void ChangeSection(MCSection *Section, const MCExpr *Subsection) override; |
| void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override; |
| void EmitLabel(MCSymbol *Symbol, SMLoc Loc, MCFragment *F) override; |
| void EmitAssemblerFlag(MCAssemblerFlag Flag) override; |
| void EmitThumbFunc(MCSymbol *Func) override; |
| void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override; |
| bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override; |
| void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override; |
| void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
| unsigned ByteAlignment) override; |
| |
| void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override; |
| void emitELFSymverDirective(StringRef AliasName, |
| const MCSymbol *Aliasee) override; |
| |
| void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
| unsigned ByteAlignment) override; |
| |
| void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr, |
| uint64_t Size = 0, unsigned ByteAlignment = 0, |
| SMLoc L = SMLoc()) override; |
| void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size, |
| unsigned ByteAlignment = 0) override; |
| void EmitValueImpl(const MCExpr *Value, unsigned Size, |
| SMLoc Loc = SMLoc()) override; |
| |
| void EmitIdent(StringRef IdentString) override; |
| |
| void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override; |
| |
| void emitCGProfileEntry(const MCSymbolRefExpr *From, |
| const MCSymbolRefExpr *To, uint64_t Count) override; |
| |
| void FinishImpl() override; |
| |
| void EmitBundleAlignMode(unsigned AlignPow2) override; |
| void EmitBundleLock(bool AlignToEnd) override; |
| void EmitBundleUnlock() override; |
| |
| private: |
| bool isBundleLocked() const; |
| void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override; |
| void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override; |
| |
| void fixSymbolsInTLSFixups(const MCExpr *expr); |
| void finalizeCGProfileEntry(const MCSymbolRefExpr *&S); |
| void finalizeCGProfile(); |
| |
| /// Merge the content of the fragment \p EF into the fragment \p DF. |
| void mergeFragment(MCDataFragment *, MCDataFragment *); |
| |
| bool SeenIdent = false; |
| |
| /// BundleGroups - The stack of fragments holding the bundle-locked |
| /// instructions. |
| SmallVector<MCDataFragment *, 4> BundleGroups; |
| }; |
| |
| MCELFStreamer *createARMELFStreamer(MCContext &Context, |
| std::unique_ptr<MCAsmBackend> TAB, |
| std::unique_ptr<MCObjectWriter> OW, |
| std::unique_ptr<MCCodeEmitter> Emitter, |
| bool RelaxAll, bool IsThumb); |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_MC_MCELFSTREAMER_H |