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84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
//===- MCObjectStreamer.h - MCStreamer Object File Interface ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCOBJECTSTREAMER_H
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#define LLVM_MC_MCOBJECTSTREAMER_H
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#include "llvm/MC/MCStreamer.h"
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namespace llvm {
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class MCAssembler;
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class MCCodeEmitter;
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class MCSectionData;
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class MCExpr;
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class MCFragment;
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class MCDataFragment;
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class TargetAsmBackend;
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class raw_ostream;
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/// \brief Streaming object file generation interface.
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///
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/// This class provides an implementation of the MCStreamer interface which is
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/// suitable for use with the assembler backend. Specific object file formats
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/// are expected to subclass this interface to implement directives specific
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/// to that file format or custom semantics expected by the object writer
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/// implementation.
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class MCObjectStreamer : public MCStreamer {
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MCAssembler *Assembler;
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MCSectionData *CurSectionData;
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virtual void EmitInstToData(const MCInst &Inst) = 0;
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protected:
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MCObjectStreamer(MCContext &Context, TargetAsmBackend &TAB,
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raw_ostream &_OS, MCCodeEmitter *_Emitter);
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~MCObjectStreamer();
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MCSectionData *getCurrentSectionData() const {
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return CurSectionData;
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}
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MCFragment *getCurrentFragment() const;
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/// Get a data fragment to write into, creating a new one if the current
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/// fragment is not a data fragment.
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MCDataFragment *getOrCreateDataFragment() const;
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const MCExpr *AddValueSymbols(const MCExpr *Value);
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public:
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MCAssembler &getAssembler() { return *Assembler; }
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/// @name MCStreamer Interface
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/// @{
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virtual void EmitLabel(MCSymbol *Symbol);
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virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
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bool isPCRel, unsigned AddrSpace);
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virtual void EmitULEB128Value(const MCExpr *Value, unsigned AddrSpace = 0);
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virtual void EmitSLEB128Value(const MCExpr *Value, unsigned AddrSpace = 0);
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virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
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virtual void ChangeSection(const MCSection *Section);
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virtual void EmitInstruction(const MCInst &Inst);
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virtual void EmitInstToFragment(const MCInst &Inst);
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virtual void EmitValueToOffset(const MCExpr *Offset, unsigned char Value);
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virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
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const MCSymbol *LastLabel,
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const MCSymbol *Label);
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virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
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const MCSymbol *Label);
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virtual void Finish();
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/// @}
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};
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} // end namespace llvm
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#endif
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