1 //===- MCELFStreamer.h - MCStreamer ELF Object File Interface ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_MC_MCELFSTREAMER_H
11 #define LLVM_MC_MCELFSTREAMER_H
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"
30 class MCELFStreamer : public MCObjectStreamer {
32 MCELFStreamer(StreamerKind Kind, MCContext &Context, MCAsmBackend &TAB,
33 raw_ostream &OS, MCCodeEmitter *Emitter)
34 : MCObjectStreamer(Kind, Context, TAB, OS, Emitter) {}
37 MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
38 MCCodeEmitter *Emitter)
39 : MCObjectStreamer(SK_ELFStreamer, Context, TAB, OS, Emitter) {}
41 MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
42 MCCodeEmitter *Emitter, MCAssembler *Assembler)
43 : MCObjectStreamer(SK_ELFStreamer, Context, TAB, OS, Emitter,
46 virtual ~MCELFStreamer();
48 /// @name MCStreamer Interface
51 virtual void InitSections();
52 virtual void InitToTextSection();
53 virtual void ChangeSection(const MCSection *Section,
54 const MCExpr *Subsection);
55 virtual void EmitLabel(MCSymbol *Symbol);
56 virtual void EmitDebugLabel(MCSymbol *Symbol);
57 virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
58 virtual void EmitThumbFunc(MCSymbol *Func);
59 virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
60 virtual bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
61 virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
62 virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
63 unsigned ByteAlignment);
64 virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol);
65 virtual void EmitCOFFSymbolStorageClass(int StorageClass);
66 virtual void EmitCOFFSymbolType(int Type);
67 virtual void EndCOFFSymbolDef();
69 virtual MCSymbolData &getOrCreateSymbolData(MCSymbol *Symbol);
71 virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
73 virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
74 unsigned ByteAlignment);
76 virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
77 uint64_t Size = 0, unsigned ByteAlignment = 0);
78 virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
79 uint64_t Size, unsigned ByteAlignment = 0);
80 virtual void EmitValueImpl(const MCExpr *Value, unsigned Size);
82 virtual void EmitFileDirective(StringRef Filename);
84 virtual void EmitTCEntry(const MCSymbol &S);
86 virtual void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned);
90 virtual void FinishImpl();
93 static bool classof(const MCStreamer *S) {
94 return S->getKind() == SK_ELFStreamer || S->getKind() == SK_ARMELFStreamer;
98 virtual void EmitInstToFragment(const MCInst &Inst);
99 virtual void EmitInstToData(const MCInst &Inst);
101 virtual void EmitBundleAlignMode(unsigned AlignPow2);
102 virtual void EmitBundleLock(bool AlignToEnd);
103 virtual void EmitBundleUnlock();
105 void fixSymbolsInTLSFixups(const MCExpr *expr);
110 unsigned ByteAlignment;
113 std::vector<LocalCommon> LocalCommons;
115 SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet;
118 void SetSection(StringRef Section, unsigned Type, unsigned Flags,
120 void SetSectionData();
121 void SetSectionText();
122 void SetSectionBss();
125 } // end namespace llvm