MCELFStreamer.h revision d32260fa904320218ba533b731af941338535232
1//===- MCELFStreamer.h - MCStreamer ELF 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_MCELFSTREAMER_H 11#define LLVM_MC_MCELFSTREAMER_H 12 13#include "llvm/ADT/SmallPtrSet.h" 14#include "llvm/MC/MCDirectives.h" 15#include "llvm/MC/MCObjectStreamer.h" 16#include "llvm/MC/SectionKind.h" 17#include "llvm/Support/DataTypes.h" 18 19#include <vector> 20 21namespace llvm { 22class MCAsmBackend; 23class MCAssembler; 24class MCCodeEmitter; 25class MCExpr; 26class MCInst; 27class MCSymbol; 28class MCSymbolData; 29class raw_ostream; 30 31class MCELFStreamer : public MCObjectStreamer { 32public: 33 MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, 34 raw_ostream &OS, MCCodeEmitter *Emitter) 35 : MCObjectStreamer(Context, TAB, OS, Emitter) {} 36 37 MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, 38 raw_ostream &OS, MCCodeEmitter *Emitter, 39 MCAssembler *Assembler) 40 : MCObjectStreamer(Context, TAB, OS, Emitter, Assembler) {} 41 42 virtual ~MCELFStreamer(); 43 44 /// @name MCStreamer Interface 45 /// @{ 46 47 virtual void InitSections(); 48 virtual void ChangeSection(const MCSection *Section); 49 virtual void EmitLabel(MCSymbol *Symbol); 50 virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); 51 virtual void EmitThumbFunc(MCSymbol *Func); 52 virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol); 53 virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute); 54 virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue); 55 virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, 56 unsigned ByteAlignment); 57 virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol); 58 virtual void EmitCOFFSymbolStorageClass(int StorageClass); 59 virtual void EmitCOFFSymbolType(int Type); 60 virtual void EndCOFFSymbolDef(); 61 62 virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value); 63 64 virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, 65 unsigned ByteAlignment); 66 67 virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0, 68 uint64_t Size = 0, unsigned ByteAlignment = 0); 69 virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, 70 uint64_t Size, unsigned ByteAlignment = 0); 71 virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, 72 unsigned AddrSpace); 73 74 virtual void EmitFileDirective(StringRef Filename); 75 76 virtual void EmitTCEntry(const MCSymbol &S); 77 78 virtual void FinishImpl(); 79 /// @} 80 81private: 82 virtual void EmitInstToFragment(const MCInst &Inst); 83 virtual void EmitInstToData(const MCInst &Inst); 84 85 void fixSymbolsInTLSFixups(const MCExpr *expr); 86 87 struct LocalCommon { 88 MCSymbolData *SD; 89 uint64_t Size; 90 unsigned ByteAlignment; 91 }; 92 93 std::vector<LocalCommon> LocalCommons; 94 95 SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet; 96 97 98 void SetSection(StringRef Section, unsigned Type, unsigned Flags, 99 SectionKind Kind); 100 void SetSectionData(); 101 void SetSectionText(); 102 void SetSectionBss(); 103}; 104 105} // end namespace llvm 106 107#endif 108