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
16using namespace llvm;
17
18void 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
38void 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
56void MipsELFStreamer::EmitLabel(MCSymbol *Symbol) {
57  MCELFStreamer::EmitLabel(Symbol);
58  Labels.push_back(Symbol);
59}
60
61void MipsELFStreamer::SwitchSection(const MCSection * Section,
62                                    const MCExpr *Subsection) {
63  MCELFStreamer::SwitchSection(Section, Subsection);
64  Labels.clear();
65}
66
67void MipsELFStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
68                                    const SMLoc &Loc) {
69  MCELFStreamer::EmitValueImpl(Value, Size, Loc);
70  Labels.clear();
71}
72
73void MipsELFStreamer::EmitMipsOptionRecords() {
74  for (const auto &I : MipsOptionRecords)
75    I->EmitMipsOptionRecord();
76}
77
78MCELFStreamer *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