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(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
33 MCCodeEmitter *Emitter)
34 : MCObjectStreamer(Context, TAB, OS, Emitter),
37 MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
38 MCCodeEmitter *Emitter, MCAssembler *Assembler)
39 : MCObjectStreamer(Context, TAB, OS, Emitter, Assembler),
42 virtual ~MCELFStreamer();
45 void reset() override {
47 BindingExplicitlySet.clear();
49 MCObjectStreamer::reset();
52 /// @name MCStreamer Interface
55 void InitSections(bool NoExecStack) override;
56 void ChangeSection(const MCSection *Section,
57 const MCExpr *Subsection) override;
58 void EmitLabel(MCSymbol *Symbol) override;
59 void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
60 void EmitThumbFunc(MCSymbol *Func) override;
61 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
62 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
63 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
64 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
65 unsigned ByteAlignment) override;
66 void BeginCOFFSymbolDef(const MCSymbol *Symbol) override;
67 void EmitCOFFSymbolStorageClass(int StorageClass) override;
68 void EmitCOFFSymbolType(int Type) override;
69 void EndCOFFSymbolDef() override;
71 void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
73 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
74 unsigned ByteAlignment) override;
76 void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = nullptr,
77 uint64_t Size = 0, unsigned ByteAlignment = 0) override;
78 void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
79 uint64_t Size, unsigned ByteAlignment = 0) override;
80 void EmitValueImpl(const MCExpr *Value, unsigned Size,
81 const SMLoc &Loc = SMLoc()) override;
83 void EmitFileDirective(StringRef Filename) override;
85 void EmitIdent(StringRef IdentString) override;
87 void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
89 void Flush() override;
91 void FinishImpl() override;
93 void EmitBundleAlignMode(unsigned AlignPow2) override;
94 void EmitBundleLock(bool AlignToEnd) override;
95 void EmitBundleUnlock() override;
98 void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
99 void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
101 void fixSymbolsInTLSFixups(const MCExpr *expr);
108 unsigned ByteAlignment;
111 std::vector<LocalCommon> LocalCommons;
113 SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet;
116 MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
117 raw_ostream &OS, MCCodeEmitter *Emitter,
118 bool RelaxAll, bool IsThumb);
120 } // end namespace llvm