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"
27 class MCELFStreamer : public MCObjectStreamer {
29 MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_pwrite_stream &OS,
30 MCCodeEmitter *Emitter)
31 : MCObjectStreamer(Context, TAB, OS, Emitter), SeenIdent(false) {}
33 ~MCELFStreamer() override;
36 void reset() override {
39 MCObjectStreamer::reset();
42 /// \name MCStreamer Interface
45 void InitSections(bool NoExecStack) override;
46 void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
47 void EmitLabel(MCSymbol *Symbol) override;
48 void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
49 void EmitThumbFunc(MCSymbol *Func) override;
50 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
51 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
52 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
53 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
54 unsigned ByteAlignment) override;
55 void BeginCOFFSymbolDef(const MCSymbol *Symbol) override;
56 void EmitCOFFSymbolStorageClass(int StorageClass) override;
57 void EmitCOFFSymbolType(int Type) override;
58 void EndCOFFSymbolDef() override;
60 void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
62 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
63 unsigned ByteAlignment) override;
65 void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
66 uint64_t Size = 0, unsigned ByteAlignment = 0) override;
67 void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
68 unsigned ByteAlignment = 0) override;
69 void EmitValueImpl(const MCExpr *Value, unsigned Size,
70 SMLoc Loc = SMLoc()) override;
72 void EmitFileDirective(StringRef Filename) override;
74 void EmitIdent(StringRef IdentString) override;
76 void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
78 void FinishImpl() override;
80 void EmitBundleAlignMode(unsigned AlignPow2) override;
81 void EmitBundleLock(bool AlignToEnd) override;
82 void EmitBundleUnlock() override;
85 bool isBundleLocked() const;
86 void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
87 void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
89 void fixSymbolsInTLSFixups(const MCExpr *expr);
91 /// \brief Merge the content of the fragment \p EF into the fragment \p DF.
92 void mergeFragment(MCDataFragment *, MCDataFragment *);
96 /// BundleGroups - The stack of fragments holding the bundle-locked
98 llvm::SmallVector<MCDataFragment *, 4> BundleGroups;
101 MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
102 raw_pwrite_stream &OS,
103 MCCodeEmitter *Emitter, bool RelaxAll,
106 } // end namespace llvm