1//===-------- MipsELFStreamer.cpp - ELF Object Output ---------------------===//
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#include "MipsELFStreamer.h"
10#include "MipsOptionRecord.h"
11#include "MipsTargetStreamer.h"
12#include "llvm/BinaryFormat/ELF.h"
13#include "llvm/MC/MCAsmBackend.h"
14#include "llvm/MC/MCAssembler.h"
15#include "llvm/MC/MCCodeEmitter.h"
16#include "llvm/MC/MCContext.h"
17#include "llvm/MC/MCDwarf.h"
18#include "llvm/MC/MCInst.h"
19#include "llvm/MC/MCObjectWriter.h"
20#include "llvm/MC/MCSymbolELF.h"
21#include "llvm/Support/Casting.h"
22
23using namespace llvm;
24
25MipsELFStreamer::MipsELFStreamer(MCContext &Context,
26 std::unique_ptr<MCAsmBackend> MAB,
27 std::unique_ptr<MCObjectWriter> OW,
28 std::unique_ptr<MCCodeEmitter> Emitter)
29 : MCELFStreamer(Context, std::move(MAB), std::move(OW),
30 std::move(Emitter)) {
31 RegInfoRecord = new MipsRegInfoRecord(this, Context);
32 MipsOptionRecords.push_back(
33 Elt: std::unique_ptr<MipsRegInfoRecord>(RegInfoRecord));
34}
35
36void MipsELFStreamer::emitInstruction(const MCInst &Inst,
37 const MCSubtargetInfo &STI) {
38 MCELFStreamer::emitInstruction(Inst, STI);
39
40 MCContext &Context = getContext();
41 const MCRegisterInfo *MCRegInfo = Context.getRegisterInfo();
42
43 for (unsigned OpIndex = 0; OpIndex < Inst.getNumOperands(); ++OpIndex) {
44 const MCOperand &Op = Inst.getOperand(i: OpIndex);
45
46 if (!Op.isReg())
47 continue;
48
49 MCRegister Reg = Op.getReg();
50 RegInfoRecord->SetPhysRegUsed(Reg, MCRegInfo);
51 }
52
53 createPendingLabelRelocs();
54}
55
56void MipsELFStreamer::emitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
57 Frame.Begin = getContext().createTempSymbol();
58 MCELFStreamer::emitLabel(Symbol: Frame.Begin);
59}
60
61MCSymbol *MipsELFStreamer::emitCFILabel() {
62 MCSymbol *Label = getContext().createTempSymbol(Name: "cfi", AlwaysAddSuffix: true);
63 MCELFStreamer::emitLabel(Symbol: Label);
64 return Label;
65}
66
67void MipsELFStreamer::emitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
68 Frame.End = getContext().createTempSymbol();
69 MCELFStreamer::emitLabel(Symbol: Frame.End);
70}
71
72void MipsELFStreamer::createPendingLabelRelocs() {
73 MipsTargetELFStreamer *ELFTargetStreamer =
74 static_cast<MipsTargetELFStreamer *>(getTargetStreamer());
75
76 // FIXME: Also mark labels when in MIPS16 mode.
77 if (ELFTargetStreamer->isMicroMipsEnabled()) {
78 for (auto *L : Labels) {
79 auto *Label = cast<MCSymbolELF>(Val: L);
80 getAssembler().registerSymbol(Symbol: *Label);
81 Label->setOther(ELF::STO_MIPS_MICROMIPS);
82 }
83 }
84
85 Labels.clear();
86}
87
88void MipsELFStreamer::emitLabel(MCSymbol *Symbol, SMLoc Loc) {
89 MCELFStreamer::emitLabel(Symbol);
90 Labels.push_back(Elt: Symbol);
91}
92
93void MipsELFStreamer::switchSection(MCSection *Section, uint32_t Subsection) {
94 MCELFStreamer::switchSection(Section, Subsec: Subsection);
95 Labels.clear();
96}
97
98void MipsELFStreamer::emitValueImpl(const MCExpr *Value, unsigned Size,
99 SMLoc Loc) {
100 MCELFStreamer::emitValueImpl(Value, Size, Loc);
101 Labels.clear();
102}
103
104void MipsELFStreamer::emitIntValue(uint64_t Value, unsigned Size) {
105 MCELFStreamer::emitIntValue(Value, Size);
106 Labels.clear();
107}
108
109void MipsELFStreamer::EmitMipsOptionRecords() {
110 for (const auto &I : MipsOptionRecords)
111 I->EmitMipsOptionRecord();
112}
113
114MCELFStreamer *
115llvm::createMipsELFStreamer(MCContext &Context,
116 std::unique_ptr<MCAsmBackend> MAB,
117 std::unique_ptr<MCObjectWriter> OW,
118 std::unique_ptr<MCCodeEmitter> Emitter) {
119 return new MipsELFStreamer(Context, std::move(MAB), std::move(OW),
120 std::move(Emitter));
121}
122