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 raw_pwrite_stream &OS, std::unique_ptr<MCCodeEmitter> Emitter);
29 ~MCELFStreamer() override = default;
32 void reset() override {
35 MCObjectStreamer::reset();
38 /// \name MCStreamer Interface
41 void InitSections(bool NoExecStack) override;
42 void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
43 void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
44 void EmitLabel(MCSymbol *Symbol, SMLoc Loc, MCFragment *F) override;
45 void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
46 void EmitThumbFunc(MCSymbol *Func) override;
47 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
48 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
49 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
50 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
51 unsigned ByteAlignment) override;
53 void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
55 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
56 unsigned ByteAlignment) override;
58 void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
59 uint64_t Size = 0, unsigned ByteAlignment = 0) override;
60 void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
61 unsigned ByteAlignment = 0) override;
62 void EmitValueImpl(const MCExpr *Value, unsigned Size,
63 SMLoc Loc = SMLoc()) override;
65 void EmitIdent(StringRef IdentString) override;
67 void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
69 void FinishImpl() override;
71 void EmitBundleAlignMode(unsigned AlignPow2) override;
72 void EmitBundleLock(bool AlignToEnd) override;
73 void EmitBundleUnlock() override;
76 bool isBundleLocked() const;
77 void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
78 void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
80 void fixSymbolsInTLSFixups(const MCExpr *expr);
82 /// \brief Merge the content of the fragment \p EF into the fragment \p DF.
83 void mergeFragment(MCDataFragment *, MCDataFragment *);
85 bool SeenIdent = false;
87 /// BundleGroups - The stack of fragments holding the bundle-locked
89 SmallVector<MCDataFragment *, 4> BundleGroups;
92 MCELFStreamer *createARMELFStreamer(MCContext &Context,
93 std::unique_ptr<MCAsmBackend> TAB,
94 raw_pwrite_stream &OS,
95 std::unique_ptr<MCCodeEmitter> Emitter,
96 bool RelaxAll, bool IsThumb);
98 } // end namespace llvm
100 #endif // LLVM_MC_MCELFSTREAMER_H