MCObjectStreamer.h revision 2c3a4641a7785da78839caf574277df9cd93b52c
180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru//===- MCObjectStreamer.h - MCStreamer Object File Interface ----*- C++ -*-===// 280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru// 380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru// The LLVM Compiler Infrastructure 480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru// 580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru// This file is distributed under the University of Illinois Open Source 680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru// License. See LICENSE.TXT for details. 780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru// 880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru//===----------------------------------------------------------------------===// 980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#ifndef LLVM_MC_MCOBJECTSTREAMER_H 1180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#define LLVM_MC_MCOBJECTSTREAMER_H 1280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include "llvm/MC/MCStreamer.h" 1480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Querunamespace llvm { 1680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCAssembler; 1780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCCodeEmitter; 1880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCSectionData; 1980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCExpr; 2080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCFragment; 2180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCDataFragment; 2280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCAsmBackend; 2380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass raw_ostream; 2480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 2580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/// \brief Streaming object file generation interface. 2680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/// 2780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/// This class provides an implementation of the MCStreamer interface which is 2880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/// suitable for use with the assembler backend. Specific object file formats 2980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/// are expected to subclass this interface to implement directives specific 3080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/// to that file format or custom semantics expected by the object writer 3180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/// implementation. 3280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass MCObjectStreamer : public MCStreamer { 3380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru MCAssembler *Assembler; 34 MCSectionData *CurSectionData; 35 36 virtual void EmitInstToData(const MCInst &Inst) = 0; 37 virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame); 38 virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame); 39 40protected: 41 MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB, 42 raw_ostream &_OS, MCCodeEmitter *_Emitter); 43 MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB, 44 raw_ostream &_OS, MCCodeEmitter *_Emitter, 45 MCAssembler *_Assembler); 46 ~MCObjectStreamer(); 47 48public: 49 /// state management 50 virtual void reset(); 51 52protected: 53 MCSectionData *getCurrentSectionData() const { 54 return CurSectionData; 55 } 56 57 MCFragment *getCurrentFragment() const; 58 59 /// Get a data fragment to write into, creating a new one if the current 60 /// fragment is not a data fragment. 61 MCDataFragment *getOrCreateDataFragment() const; 62 63 const MCExpr *AddValueSymbols(const MCExpr *Value); 64 65public: 66 MCAssembler &getAssembler() { return *Assembler; } 67 68 /// @name MCStreamer Interface 69 /// @{ 70 71 virtual void EmitLabel(MCSymbol *Symbol); 72 virtual void EmitDebugLabel(MCSymbol *Symbol); 73 virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value); 74 virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, 75 unsigned AddrSpace); 76 virtual void EmitULEB128Value(const MCExpr *Value); 77 virtual void EmitSLEB128Value(const MCExpr *Value); 78 virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol); 79 virtual void ChangeSection(const MCSection *Section); 80 virtual void EmitInstruction(const MCInst &Inst); 81 virtual void EmitInstToFragment(const MCInst &Inst); 82 virtual void EmitBytes(StringRef Data, unsigned AddrSpace); 83 virtual void EmitValueToAlignment(unsigned ByteAlignment, 84 int64_t Value = 0, 85 unsigned ValueSize = 1, 86 unsigned MaxBytesToEmit = 0); 87 virtual void EmitCodeAlignment(unsigned ByteAlignment, 88 unsigned MaxBytesToEmit = 0); 89 virtual bool EmitValueToOffset(const MCExpr *Offset, unsigned char Value); 90 virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta, 91 const MCSymbol *LastLabel, 92 const MCSymbol *Label, 93 unsigned PointerSize); 94 virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, 95 const MCSymbol *Label); 96 virtual void EmitGPRel32Value(const MCExpr *Value); 97 virtual void EmitGPRel64Value(const MCExpr *Value); 98 virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue, 99 unsigned AddrSpace); 100 virtual void FinishImpl(); 101 102 /// @} 103}; 104 105} // end namespace llvm 106 107#endif 108