MCObjectStreamer.h revision 59ff3c913449402ad5447bbe3ae6338402fb84b0
1//===- MCObjectStreamer.h - MCStreamer Object File Interface ----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef LLVM_MC_MCOBJECTSTREAMER_H 11#define LLVM_MC_MCOBJECTSTREAMER_H 12 13#include "llvm/MC/MCStreamer.h" 14 15namespace llvm { 16class MCAssembler; 17class MCCodeEmitter; 18class MCSectionData; 19class MCExpr; 20class MCFragment; 21class MCDataFragment; 22class TargetAsmBackend; 23class raw_ostream; 24 25/// \brief Streaming object file generation interface. 26/// 27/// This class provides an implementation of the MCStreamer interface which is 28/// suitable for use with the assembler backend. Specific object file formats 29/// are expected to subclass this interface to implement directives specific 30/// to that file format or custom semantics expected by the object writer 31/// implementation. 32class MCObjectStreamer : public MCStreamer { 33 MCAssembler *Assembler; 34 MCSectionData *CurSectionData; 35 36protected: 37 MCObjectStreamer(MCContext &Context, TargetAsmBackend &TAB, 38 raw_ostream &_OS, MCCodeEmitter *_Emitter, 39 bool _PadSectionToAlignment); 40 ~MCObjectStreamer(); 41 42 MCSectionData *getCurrentSectionData() const { 43 return CurSectionData; 44 } 45 46 MCFragment *getCurrentFragment() const; 47 48 /// Get a data fragment to write into, creating a new one if the current 49 /// fragment is not a data fragment. 50 MCDataFragment *getOrCreateDataFragment() const; 51 52 const MCExpr *AddValueSymbols(const MCExpr *Value); 53 54public: 55 MCAssembler &getAssembler() { return *Assembler; } 56 57 /// @name MCStreamer Interface 58 /// @{ 59 60 virtual void SwitchSection(const MCSection *Section); 61 virtual void Finish(); 62 63 /// @} 64}; 65 66} // end namespace llvm 67 68#endif 69