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1 | //===- MCELFStreamer.h - MCStreamer ELF Object File Interface ---*- C++ -*-===// |
2 | // | |
3 | // The LLVM Compiler Infrastructure | |
4 | // | |
5 | // This file is distributed under the University of Illinois Open Source | |
6 | // License. See LICENSE.TXT for details. | |
7 | // | |
8 | //===----------------------------------------------------------------------===// | |
9 | ||
10 | #ifndef LLVM_MC_MCELFSTREAMER_H | |
11 | #define LLVM_MC_MCELFSTREAMER_H | |
12 | ||
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" | |
18 | #include <vector> | |
19 | ||
20 | namespace llvm { | |
21 | class MCAsmBackend; | |
22 | class MCAssembler; | |
23 | class MCCodeEmitter; | |
24 | class MCExpr; | |
25 | class MCInst; | |
26 | class MCSymbol; | |
27 | class MCSymbolData; | |
28 | class raw_ostream; | |
29 | ||
30 | class MCELFStreamer : public MCObjectStreamer { | |
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31 | public: |
32 | MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS, | |
33 | MCCodeEmitter *Emitter) | |
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34 | : MCObjectStreamer(Context, TAB, OS, Emitter), |
35 | SeenIdent(false) {} | |
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36 | |
37 | MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS, | |
38 | MCCodeEmitter *Emitter, MCAssembler *Assembler) | |
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39 | : MCObjectStreamer(Context, TAB, OS, Emitter, Assembler), |
40 | SeenIdent(false) {} | |
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41 | |
42 | virtual ~MCELFStreamer(); | |
43 | ||
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44 | /// state management |
45 | void reset() override { | |
46 | LocalCommons.clear(); | |
47 | BindingExplicitlySet.clear(); | |
48 | SeenIdent = false; | |
49 | MCObjectStreamer::reset(); | |
50 | } | |
51 | ||
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52 | /// @name MCStreamer Interface |
53 | /// @{ | |
54 | ||
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55 | void InitSections() 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; | |
970d7e83 | 70 | |
1a4d82fc | 71 | void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override; |
970d7e83 | 72 | |
1a4d82fc JJ |
73 | void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
74 | unsigned ByteAlignment) override; | |
970d7e83 | 75 | |
1a4d82fc JJ |
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; | |
970d7e83 | 82 | |
1a4d82fc | 83 | void EmitFileDirective(StringRef Filename) override; |
970d7e83 | 84 | |
1a4d82fc | 85 | void EmitIdent(StringRef IdentString) override; |
970d7e83 | 86 | |
1a4d82fc | 87 | void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override; |
970d7e83 | 88 | |
1a4d82fc | 89 | void Flush() override; |
970d7e83 | 90 | |
1a4d82fc | 91 | void FinishImpl() override; |
970d7e83 | 92 | |
1a4d82fc JJ |
93 | void EmitBundleAlignMode(unsigned AlignPow2) override; |
94 | void EmitBundleLock(bool AlignToEnd) override; | |
95 | void EmitBundleUnlock() override; | |
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96 | |
97 | private: | |
1a4d82fc JJ |
98 | void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override; |
99 | void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override; | |
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100 | |
101 | void fixSymbolsInTLSFixups(const MCExpr *expr); | |
102 | ||
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103 | bool SeenIdent; |
104 | ||
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105 | struct LocalCommon { |
106 | MCSymbolData *SD; | |
107 | uint64_t Size; | |
108 | unsigned ByteAlignment; | |
109 | }; | |
110 | ||
111 | std::vector<LocalCommon> LocalCommons; | |
112 | ||
113 | SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet; | |
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114 | }; |
115 | ||
1a4d82fc JJ |
116 | MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB, |
117 | raw_ostream &OS, MCCodeEmitter *Emitter, | |
118 | bool RelaxAll, bool NoExecStack, | |
119 | bool IsThumb); | |
120 | ||
970d7e83 LB |
121 | } // end namespace llvm |
122 | ||
123 | #endif |