1 | //===- MCWasmStreamer.h - MCStreamer Wasm Object File Interface -*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #ifndef LLVM_MC_MCWASMSTREAMER_H |
10 | #define LLVM_MC_MCWASMSTREAMER_H |
11 | |
12 | #include "MCAsmBackend.h" |
13 | #include "MCCodeEmitter.h" |
14 | #include "llvm/MC/MCDirectives.h" |
15 | #include "llvm/MC/MCObjectStreamer.h" |
16 | #include "llvm/MC/MCObjectWriter.h" |
17 | #include "llvm/Support/DataTypes.h" |
18 | |
19 | namespace llvm { |
20 | class MCExpr; |
21 | class MCInst; |
22 | |
23 | class MCWasmStreamer : public MCObjectStreamer { |
24 | public: |
25 | MCWasmStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB, |
26 | std::unique_ptr<MCObjectWriter> OW, |
27 | std::unique_ptr<MCCodeEmitter> Emitter) |
28 | : MCObjectStreamer(Context, std::move(TAB), std::move(OW), |
29 | std::move(Emitter)), |
30 | SeenIdent(false) {} |
31 | |
32 | ~MCWasmStreamer() override; |
33 | |
34 | /// state management |
35 | void reset() override { |
36 | SeenIdent = false; |
37 | MCObjectStreamer::reset(); |
38 | } |
39 | |
40 | /// \name MCStreamer Interface |
41 | /// @{ |
42 | |
43 | void changeSection(MCSection *Section, const MCExpr *Subsection) override; |
44 | void emitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override; |
45 | void emitLabelAtPos(MCSymbol *Symbol, SMLoc Loc, MCFragment *F, |
46 | uint64_t Offset) override; |
47 | void emitAssemblerFlag(MCAssemblerFlag Flag) override; |
48 | void emitThumbFunc(MCSymbol *Func) override; |
49 | void emitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override; |
50 | bool emitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override; |
51 | void emitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override; |
52 | void emitCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
53 | Align ByteAlignment) override; |
54 | |
55 | void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override; |
56 | |
57 | void emitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
58 | Align ByteAlignment) override; |
59 | |
60 | void emitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr, |
61 | uint64_t Size = 0, Align ByteAlignment = Align(1), |
62 | SMLoc Loc = SMLoc()) override; |
63 | void emitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size, |
64 | Align ByteAlignment = Align(1)) override; |
65 | |
66 | void emitIdent(StringRef IdentString) override; |
67 | |
68 | void finishImpl() override; |
69 | |
70 | private: |
71 | void emitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override; |
72 | void emitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override; |
73 | |
74 | void fixSymbolsInTLSFixups(const MCExpr *expr); |
75 | |
76 | /// Merge the content of the fragment \p EF into the fragment \p DF. |
77 | void mergeFragment(MCDataFragment *, MCDataFragment *); |
78 | |
79 | bool SeenIdent; |
80 | }; |
81 | |
82 | } // end namespace llvm |
83 | |
84 | #endif |
85 | |