1//===-- AArch64TargetStreamer.h - AArch64 Target Streamer ------*- 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_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64TARGETSTREAMER_H
10#define LLVM_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64TARGETSTREAMER_H
11
12#include "llvm/MC/MCStreamer.h"
13
14namespace {
15class AArch64ELFStreamer;
16}
17
18namespace llvm {
19
20class AArch64TargetStreamer : public MCTargetStreamer {
21public:
22 AArch64TargetStreamer(MCStreamer &S);
23 ~AArch64TargetStreamer() override;
24
25 void finish() override;
26 void emitConstantPools() override;
27
28 /// Callback used to implement the ldr= pseudo.
29 /// Add a new entry to the constant pool for the current section and return an
30 /// MCExpr that can be used to refer to the constant pool location.
31 const MCExpr *addConstantPoolEntry(const MCExpr *, unsigned Size, SMLoc Loc);
32
33 /// Callback used to implement the .ltorg directive.
34 /// Emit contents of constant pool for the current section.
35 void emitCurrentConstantPool();
36
37 /// Callback used to implement the .note.gnu.property section.
38 void emitNoteSection(unsigned Flags, uint64_t PAuthABIPlatform = -1,
39 uint64_t PAuthABIVersion = -1);
40
41 /// Callback used to implement the .inst directive.
42 virtual void emitInst(uint32_t Inst);
43
44 /// Callback used to implement the .variant_pcs directive.
45 virtual void emitDirectiveVariantPCS(MCSymbol *Symbol) {};
46
47 virtual void emitARM64WinCFIAllocStack(unsigned Size) {}
48 virtual void emitARM64WinCFISaveR19R20X(int Offset) {}
49 virtual void emitARM64WinCFISaveFPLR(int Offset) {}
50 virtual void emitARM64WinCFISaveFPLRX(int Offset) {}
51 virtual void emitARM64WinCFISaveReg(unsigned Reg, int Offset) {}
52 virtual void emitARM64WinCFISaveRegX(unsigned Reg, int Offset) {}
53 virtual void emitARM64WinCFISaveRegP(unsigned Reg, int Offset) {}
54 virtual void emitARM64WinCFISaveRegPX(unsigned Reg, int Offset) {}
55 virtual void emitARM64WinCFISaveLRPair(unsigned Reg, int Offset) {}
56 virtual void emitARM64WinCFISaveFReg(unsigned Reg, int Offset) {}
57 virtual void emitARM64WinCFISaveFRegX(unsigned Reg, int Offset) {}
58 virtual void emitARM64WinCFISaveFRegP(unsigned Reg, int Offset) {}
59 virtual void emitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) {}
60 virtual void emitARM64WinCFISetFP() {}
61 virtual void emitARM64WinCFIAddFP(unsigned Size) {}
62 virtual void emitARM64WinCFINop() {}
63 virtual void emitARM64WinCFISaveNext() {}
64 virtual void emitARM64WinCFIPrologEnd() {}
65 virtual void emitARM64WinCFIEpilogStart() {}
66 virtual void emitARM64WinCFIEpilogEnd() {}
67 virtual void emitARM64WinCFITrapFrame() {}
68 virtual void emitARM64WinCFIMachineFrame() {}
69 virtual void emitARM64WinCFIContext() {}
70 virtual void emitARM64WinCFIECContext() {}
71 virtual void emitARM64WinCFIClearUnwoundToCall() {}
72 virtual void emitARM64WinCFIPACSignLR() {}
73 virtual void emitARM64WinCFISaveAnyRegI(unsigned Reg, int Offset) {}
74 virtual void emitARM64WinCFISaveAnyRegIP(unsigned Reg, int Offset) {}
75 virtual void emitARM64WinCFISaveAnyRegD(unsigned Reg, int Offset) {}
76 virtual void emitARM64WinCFISaveAnyRegDP(unsigned Reg, int Offset) {}
77 virtual void emitARM64WinCFISaveAnyRegQ(unsigned Reg, int Offset) {}
78 virtual void emitARM64WinCFISaveAnyRegQP(unsigned Reg, int Offset) {}
79 virtual void emitARM64WinCFISaveAnyRegIX(unsigned Reg, int Offset) {}
80 virtual void emitARM64WinCFISaveAnyRegIPX(unsigned Reg, int Offset) {}
81 virtual void emitARM64WinCFISaveAnyRegDX(unsigned Reg, int Offset) {}
82 virtual void emitARM64WinCFISaveAnyRegDPX(unsigned Reg, int Offset) {}
83 virtual void emitARM64WinCFISaveAnyRegQX(unsigned Reg, int Offset) {}
84 virtual void emitARM64WinCFISaveAnyRegQPX(unsigned Reg, int Offset) {}
85
86private:
87 std::unique_ptr<AssemblerConstantPools> ConstantPools;
88};
89
90class AArch64TargetELFStreamer : public AArch64TargetStreamer {
91private:
92 AArch64ELFStreamer &getStreamer();
93
94 void emitInst(uint32_t Inst) override;
95 void emitDirectiveVariantPCS(MCSymbol *Symbol) override;
96 void finish() override;
97
98public:
99 AArch64TargetELFStreamer(MCStreamer &S) : AArch64TargetStreamer(S) {}
100};
101
102class AArch64TargetWinCOFFStreamer : public llvm::AArch64TargetStreamer {
103private:
104 // True if we are processing SEH directives in an epilogue.
105 bool InEpilogCFI = false;
106
107 // Symbol of the current epilog for which we are processing SEH directives.
108 MCSymbol *CurrentEpilog = nullptr;
109public:
110 AArch64TargetWinCOFFStreamer(llvm::MCStreamer &S)
111 : AArch64TargetStreamer(S) {}
112
113 // The unwind codes on ARM64 Windows are documented at
114 // https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling
115 void emitARM64WinCFIAllocStack(unsigned Size) override;
116 void emitARM64WinCFISaveR19R20X(int Offset) override;
117 void emitARM64WinCFISaveFPLR(int Offset) override;
118 void emitARM64WinCFISaveFPLRX(int Offset) override;
119 void emitARM64WinCFISaveReg(unsigned Reg, int Offset) override;
120 void emitARM64WinCFISaveRegX(unsigned Reg, int Offset) override;
121 void emitARM64WinCFISaveRegP(unsigned Reg, int Offset) override;
122 void emitARM64WinCFISaveRegPX(unsigned Reg, int Offset) override;
123 void emitARM64WinCFISaveLRPair(unsigned Reg, int Offset) override;
124 void emitARM64WinCFISaveFReg(unsigned Reg, int Offset) override;
125 void emitARM64WinCFISaveFRegX(unsigned Reg, int Offset) override;
126 void emitARM64WinCFISaveFRegP(unsigned Reg, int Offset) override;
127 void emitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) override;
128 void emitARM64WinCFISetFP() override;
129 void emitARM64WinCFIAddFP(unsigned Size) override;
130 void emitARM64WinCFINop() override;
131 void emitARM64WinCFISaveNext() override;
132 void emitARM64WinCFIPrologEnd() override;
133 void emitARM64WinCFIEpilogStart() override;
134 void emitARM64WinCFIEpilogEnd() override;
135 void emitARM64WinCFITrapFrame() override;
136 void emitARM64WinCFIMachineFrame() override;
137 void emitARM64WinCFIContext() override;
138 void emitARM64WinCFIECContext() override;
139 void emitARM64WinCFIClearUnwoundToCall() override;
140 void emitARM64WinCFIPACSignLR() override;
141 void emitARM64WinCFISaveAnyRegI(unsigned Reg, int Offset) override;
142 void emitARM64WinCFISaveAnyRegIP(unsigned Reg, int Offset) override;
143 void emitARM64WinCFISaveAnyRegD(unsigned Reg, int Offset) override;
144 void emitARM64WinCFISaveAnyRegDP(unsigned Reg, int Offset) override;
145 void emitARM64WinCFISaveAnyRegQ(unsigned Reg, int Offset) override;
146 void emitARM64WinCFISaveAnyRegQP(unsigned Reg, int Offset) override;
147 void emitARM64WinCFISaveAnyRegIX(unsigned Reg, int Offset) override;
148 void emitARM64WinCFISaveAnyRegIPX(unsigned Reg, int Offset) override;
149 void emitARM64WinCFISaveAnyRegDX(unsigned Reg, int Offset) override;
150 void emitARM64WinCFISaveAnyRegDPX(unsigned Reg, int Offset) override;
151 void emitARM64WinCFISaveAnyRegQX(unsigned Reg, int Offset) override;
152 void emitARM64WinCFISaveAnyRegQPX(unsigned Reg, int Offset) override;
153
154private:
155 void emitARM64WinUnwindCode(unsigned UnwindCode, int Reg, int Offset);
156};
157
158MCTargetStreamer *
159createAArch64ObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI);
160
161MCTargetStreamer *createAArch64NullTargetStreamer(MCStreamer &S);
162
163} // end namespace llvm
164
165#endif
166