1 //===-------- MipsELFStreamer.cpp - ELF Object Output ---------------------===//
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 #include "MipsELFStreamer.h"
11 #include "MipsTargetStreamer.h"
12 #include "llvm/MC/MCELF.h"
13 #include "llvm/MC/MCInst.h"
14 #include "llvm/Support/ELF.h"
15
16 using namespace llvm;
17
EmitInstruction(const MCInst & Inst,const MCSubtargetInfo & STI)18 void MipsELFStreamer::EmitInstruction(const MCInst &Inst,
19 const MCSubtargetInfo &STI) {
20 MCELFStreamer::EmitInstruction(Inst, STI);
21
22 MCContext &Context = getContext();
23 const MCRegisterInfo *MCRegInfo = Context.getRegisterInfo();
24
25 for (unsigned OpIndex = 0; OpIndex < Inst.getNumOperands(); ++OpIndex) {
26 const MCOperand &Op = Inst.getOperand(OpIndex);
27
28 if (!Op.isReg())
29 continue;
30
31 unsigned Reg = Op.getReg();
32 RegInfoRecord->SetPhysRegUsed(Reg, MCRegInfo);
33 }
34
35 createPendingLabelRelocs();
36 }
37
createPendingLabelRelocs()38 void MipsELFStreamer::createPendingLabelRelocs() {
39 MipsTargetELFStreamer *ELFTargetStreamer =
40 static_cast<MipsTargetELFStreamer *>(getTargetStreamer());
41
42 // FIXME: Also mark labels when in MIPS16 mode.
43 if (ELFTargetStreamer->isMicroMipsEnabled()) {
44 for (auto Label : Labels) {
45 MCSymbolData &Data = getOrCreateSymbolData(Label);
46 // The "other" values are stored in the last 6 bits of the second byte.
47 // The traditional defines for STO values assume the full byte and thus
48 // the shift to pack it.
49 MCELF::setOther(Data, ELF::STO_MIPS_MICROMIPS >> 2);
50 }
51 }
52
53 Labels.clear();
54 }
55
EmitLabel(MCSymbol * Symbol)56 void MipsELFStreamer::EmitLabel(MCSymbol *Symbol) {
57 MCELFStreamer::EmitLabel(Symbol);
58 Labels.push_back(Symbol);
59 }
60
SwitchSection(const MCSection * Section,const MCExpr * Subsection)61 void MipsELFStreamer::SwitchSection(const MCSection * Section,
62 const MCExpr *Subsection) {
63 MCELFStreamer::SwitchSection(Section, Subsection);
64 Labels.clear();
65 }
66
EmitValueImpl(const MCExpr * Value,unsigned Size,const SMLoc & Loc)67 void MipsELFStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
68 const SMLoc &Loc) {
69 MCELFStreamer::EmitValueImpl(Value, Size, Loc);
70 Labels.clear();
71 }
72
EmitMipsOptionRecords()73 void MipsELFStreamer::EmitMipsOptionRecords() {
74 for (const auto &I : MipsOptionRecords)
75 I->EmitMipsOptionRecord();
76 }
77
createMipsELFStreamer(MCContext & Context,MCAsmBackend & MAB,raw_pwrite_stream & OS,MCCodeEmitter * Emitter,bool RelaxAll)78 MCELFStreamer *llvm::createMipsELFStreamer(MCContext &Context,
79 MCAsmBackend &MAB,
80 raw_pwrite_stream &OS,
81 MCCodeEmitter *Emitter,
82 bool RelaxAll) {
83 return new MipsELFStreamer(Context, MAB, OS, Emitter);
84 }
85