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/SmallVector.h"
14 #include "llvm/MC/MCDirectives.h"
15 #include "llvm/MC/MCObjectStreamer.h"
24 class MCELFStreamer : public MCObjectStreamer {
26 MCELFStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB,
27 std::unique_ptr<MCObjectWriter> OW,
28 std::unique_ptr<MCCodeEmitter> Emitter);
30 ~MCELFStreamer() override = default;
33 void reset() override {
36 MCObjectStreamer::reset();
39 /// \name MCStreamer Interface
42 void InitSections(bool NoExecStack) override;
43 void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
44 void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
45 void EmitLabel(MCSymbol *Symbol, SMLoc Loc, MCFragment *F) override;
46 void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
47 void EmitThumbFunc(MCSymbol *Func) override;
48 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
49 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
50 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
51 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
52 unsigned ByteAlignment) override;
54 void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
55 void emitELFSymverDirective(StringRef AliasName,
56 const MCSymbol *Aliasee) override;
58 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
59 unsigned ByteAlignment) override;
61 void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
62 uint64_t Size = 0, unsigned ByteAlignment = 0,
63 SMLoc L = SMLoc()) override;
64 void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
65 unsigned ByteAlignment = 0) override;
66 void EmitValueImpl(const MCExpr *Value, unsigned Size,
67 SMLoc Loc = SMLoc()) override;
69 void EmitIdent(StringRef IdentString) override;
71 void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
73 void emitCGProfileEntry(const MCSymbolRefExpr *From,
74 const MCSymbolRefExpr *To, uint64_t Count) override;
76 void FinishImpl() override;
78 void EmitBundleAlignMode(unsigned AlignPow2) override;
79 void EmitBundleLock(bool AlignToEnd) override;
80 void EmitBundleUnlock() override;
83 bool isBundleLocked() const;
84 void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
85 void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
87 void fixSymbolsInTLSFixups(const MCExpr *expr);
88 void finalizeCGProfileEntry(const MCSymbolRefExpr *&S);
89 void finalizeCGProfile();
91 /// Merge the content of the fragment \p EF into the fragment \p DF.
92 void mergeFragment(MCDataFragment *, MCDataFragment *);
94 bool SeenIdent = false;
96 /// BundleGroups - The stack of fragments holding the bundle-locked
98 SmallVector<MCDataFragment *, 4> BundleGroups;
101 MCELFStreamer *createARMELFStreamer(MCContext &Context,
102 std::unique_ptr<MCAsmBackend> TAB,
103 std::unique_ptr<MCObjectWriter> OW,
104 std::unique_ptr<MCCodeEmitter> Emitter,
105 bool RelaxAll, bool IsThumb);
107 } // end namespace llvm
109 #endif // LLVM_MC_MCELFSTREAMER_H