MCObjectStreamer.cpp revision 251040bc18eedfa56d01fe92836e55cfd8c5d990
18dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar//===- lib/MC/MCObjectStreamer.cpp - Object File MCStreamer Interface -----===// 28dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar// 38dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar// The LLVM Compiler Infrastructure 48dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar// 58dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar// This file is distributed under the University of Illinois Open Source 68dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar// License. See LICENSE.TXT for details. 78dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar// 88dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar//===----------------------------------------------------------------------===// 98dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar 108dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar#include "llvm/MC/MCObjectStreamer.h" 11f1d0f7781e766df878bec4e7977fa3204374f394Craig Topper#include "llvm/MC/MCAsmBackend.h" 12f1d0f7781e766df878bec4e7977fa3204374f394Craig Topper#include "llvm/MC/MCAsmInfo.h" 138dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar#include "llvm/MC/MCAssembler.h" 141abcd06856df324eac98d4bf5ba673fb77ae6a11Benjamin Kramer#include "llvm/MC/MCCodeEmitter.h" 1589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola#include "llvm/MC/MCContext.h" 16f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola#include "llvm/MC/MCDwarf.h" 178067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer#include "llvm/MC/MCExpr.h" 18f1d0f7781e766df878bec4e7977fa3204374f394Craig Topper#include "llvm/MC/MCObjectWriter.h" 19ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola#include "llvm/MC/MCSymbol.h" 20f1d0f7781e766df878bec4e7977fa3204374f394Craig Topper#include "llvm/Support/ErrorHandling.h" 218dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbarusing namespace llvm; 228dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar 2378c10eeaa57d1c6c4b7781d3c0bcb0cfbbc43b5cEvan ChengMCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB, 24feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar raw_ostream &OS, MCCodeEmitter *Emitter_) 25feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar : MCStreamer(Context), 26feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar Assembler(new MCAssembler(Context, TAB, 27feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar *Emitter_, *TAB.createObjectWriter(OS), 28feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar OS)), 2983b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar CurSectionData(0) 308dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar{ 318dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar} 328dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar 3378c10eeaa57d1c6c4b7781d3c0bcb0cfbbc43b5cEvan ChengMCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB, 3401dff9646173fea0c38df4471f41272557ca831aJan Sjödin raw_ostream &OS, MCCodeEmitter *Emitter_, 3501dff9646173fea0c38df4471f41272557ca831aJan Sjödin MCAssembler *_Assembler) 3601dff9646173fea0c38df4471f41272557ca831aJan Sjödin : MCStreamer(Context), Assembler(_Assembler), CurSectionData(0) 3701dff9646173fea0c38df4471f41272557ca831aJan Sjödin{ 3801dff9646173fea0c38df4471f41272557ca831aJan Sjödin} 3901dff9646173fea0c38df4471f41272557ca831aJan Sjödin 408dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel DunbarMCObjectStreamer::~MCObjectStreamer() { 411abcd06856df324eac98d4bf5ba673fb77ae6a11Benjamin Kramer delete &Assembler->getBackend(); 421abcd06856df324eac98d4bf5ba673fb77ae6a11Benjamin Kramer delete &Assembler->getEmitter(); 43feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar delete &Assembler->getWriter(); 448dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar delete Assembler; 458dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar} 4683b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 475399d2502acaf96fe8420e61913e77f0b23650ffPedro Artigasvoid MCObjectStreamer::reset() { 4899cbdde6198623ff014c776743caec2cf48f4840Pedro Artigas if (Assembler) 4999cbdde6198623ff014c776743caec2cf48f4840Pedro Artigas Assembler->reset(); 50b9d1005e96681b5c8cc1ed959fa129de62933020Pedro Artigas CurSectionData = 0; 515399d2502acaf96fe8420e61913e77f0b23650ffPedro Artigas MCStreamer::reset(); 525399d2502acaf96fe8420e61913e77f0b23650ffPedro Artigas} 535399d2502acaf96fe8420e61913e77f0b23650ffPedro Artigas 548067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. SpencerMCFragment *MCObjectStreamer::getCurrentFragment() const { 558067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer assert(getCurrentSectionData() && "No current section!"); 568067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 578067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer if (!getCurrentSectionData()->empty()) 588067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return &getCurrentSectionData()->getFragmentList().back(); 598067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 608067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return 0; 618067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 628067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 638067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. SpencerMCDataFragment *MCObjectStreamer::getOrCreateDataFragment() const { 648067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer MCDataFragment *F = dyn_cast_or_null<MCDataFragment>(getCurrentFragment()); 658067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer if (!F) 668067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer F = new MCDataFragment(getCurrentSectionData()); 678067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return F; 688067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 698067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 708067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencerconst MCExpr *MCObjectStreamer::AddValueSymbols(const MCExpr *Value) { 718067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer switch (Value->getKind()) { 727597212abced110723f2fee985a7d60557c092ecEvan Cheng case MCExpr::Target: 737597212abced110723f2fee985a7d60557c092ecEvan Cheng cast<MCTargetExpr>(Value)->AddValueSymbols(Assembler); 747597212abced110723f2fee985a7d60557c092ecEvan Cheng break; 757597212abced110723f2fee985a7d60557c092ecEvan Cheng 768067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Constant: 778067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 788067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 798067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Binary: { 808067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value); 818067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(BE->getLHS()); 828067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(BE->getRHS()); 838067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 848067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer } 858067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 868067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::SymbolRef: 878067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer Assembler->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol()); 888067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 898067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 908067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Unary: 918067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(cast<MCUnaryExpr>(Value)->getSubExpr()); 928067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 938067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer } 948067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 958067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return Value; 968067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 978067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 9889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolavoid MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, 99debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola unsigned AddrSpace) { 1006f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola assert(AddrSpace == 0 && "Address space must be 0!"); 1016f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola MCDataFragment *DF = getOrCreateDataFragment(); 1026f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola 1036f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola // Avoid fixups when possible. 1046f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola int64_t AbsValue; 105d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (AddValueSymbols(Value)->EvaluateAsAbsolute(AbsValue, getAssembler())) { 1062df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola EmitIntValue(AbsValue, Size, AddrSpace); 1072df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola return; 1086f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola } 10964d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky DF->getFixups().push_back( 11064d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky MCFixup::Create(DF->getContents().size(), Value, 11164d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky MCFixup::getKindForSize(Size, false))); 1122df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola DF->getContents().resize(DF->getContents().size() + Size, 0); 1136f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola} 1146f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola 115547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindolavoid MCObjectStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { 116547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindola RecordProcStart(Frame); 117547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindola} 118547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindola 1191fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindolavoid MCObjectStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { 1201fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindola RecordProcEnd(Frame); 1211fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindola} 1221fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindola 123ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindolavoid MCObjectStreamer::EmitLabel(MCSymbol *Symbol) { 124ed708f9c1facb9928ef2f79503e7030c8f25b00dRafael Espindola MCStreamer::EmitLabel(Symbol); 125ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 126ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); 127ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 128ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // FIXME: This is wasteful, we don't necessarily need to create a data 129ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment. Instead, we should mark the symbol as pointing into the data 130ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment if it exists, otherwise we should just queue the label and set its 131ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment pointer when we emit the next fragment. 132ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCDataFragment *F = getOrCreateDataFragment(); 133ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola assert(!SD.getFragment() && "Unexpected fragment on symbol data!"); 134ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola SD.setFragment(F); 135ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola SD.setOffset(F->getContents().size()); 136ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola} 137ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 1382c3a4641a7785da78839caf574277df9cd93b52cReed Kotlervoid MCObjectStreamer::EmitDebugLabel(MCSymbol *Symbol) { 1392c3a4641a7785da78839caf574277df9cd93b52cReed Kotler EmitLabel(Symbol); 1402c3a4641a7785da78839caf574277df9cd93b52cReed Kotler} 1412c3a4641a7785da78839caf574277df9cd93b52cReed Kotler 142e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindolavoid MCObjectStreamer::EmitULEB128Value(const MCExpr *Value) { 143660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola int64_t IntValue; 144d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) { 145e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola EmitULEB128IntValue(IntValue); 146660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola return; 147660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola } 148a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola Value = ForceExpAbs(Value); 1493ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola new MCLEBFragment(*Value, false, getCurrentSectionData()); 1503ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola} 1513ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola 152e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindolavoid MCObjectStreamer::EmitSLEB128Value(const MCExpr *Value) { 153660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola int64_t IntValue; 154d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) { 155e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola EmitSLEB128IntValue(IntValue); 156660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola return; 157660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola } 158a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola Value = ForceExpAbs(Value); 1593ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola new MCLEBFragment(*Value, true, getCurrentSectionData()); 1603ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola} 1613ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola 162484291c27319668ad99cb87def000254357736fbRafael Espindolavoid MCObjectStreamer::EmitWeakReference(MCSymbol *Alias, 163484291c27319668ad99cb87def000254357736fbRafael Espindola const MCSymbol *Symbol) { 164484291c27319668ad99cb87def000254357736fbRafael Espindola report_fatal_error("This file format doesn't support weak aliases."); 165484291c27319668ad99cb87def000254357736fbRafael Espindola} 166484291c27319668ad99cb87def000254357736fbRafael Espindola 1677768a9dce14431018133cd586f5c8ce3e057f069Rafael Espindolavoid MCObjectStreamer::ChangeSection(const MCSection *Section) { 16883b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar assert(Section && "Cannot switch to a null section!"); 16983b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 17083b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar CurSectionData = &getAssembler().getOrCreateSectionData(*Section); 17183b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar} 17283b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 173ef76b273f96d99a4a260f3dcadde8fbb96256cf3Eli Benderskyvoid MCObjectStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { 174ef76b273f96d99a4a260f3dcadde8fbb96256cf3Eli Bendersky getAssembler().getOrCreateSymbolData(*Symbol); 175ef76b273f96d99a4a260f3dcadde8fbb96256cf3Eli Bendersky Symbol->setVariableValue(AddValueSymbols(Value)); 176ef76b273f96d99a4a260f3dcadde8fbb96256cf3Eli Bendersky} 177ef76b273f96d99a4a260f3dcadde8fbb96256cf3Eli Bendersky 178f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindolavoid MCObjectStreamer::EmitInstruction(const MCInst &Inst) { 179f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Scan for values. 180f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola for (unsigned i = Inst.getNumOperands(); i--; ) 181f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola if (Inst.getOperand(i).isExpr()) 182f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola AddValueSymbols(Inst.getOperand(i).getExpr()); 183f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 1844766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky MCSectionData *SD = getCurrentSectionData(); 1854766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky SD->setHasInstructions(true); 186f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 187f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Now that a machine instruction has been assembled into this section, make 188f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // a line entry for any .loc directive that has been seen. 189f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola MCLineEntry::Make(this, getCurrentSection()); 190f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 191f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // If this instruction doesn't need relaxation, just emit it as data. 1924766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky MCAssembler &Assembler = getAssembler(); 1934766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky if (!Assembler.getBackend().mayNeedRelaxation(Inst)) { 194f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToData(Inst); 195f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola return; 196f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola } 197f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 1984766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky // Otherwise, relax and emit it as data if either: 1994766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky // - The RelaxAll flag was passed 2004766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky // - Bundling is enabled and this instruction is inside a bundle-locked 2014766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky // group. We want to emit all such instructions into the same data 2024766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky // fragment. 2034766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky if (Assembler.getRelaxAll() || 2044766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky (Assembler.isBundlingEnabled() && SD->isBundleLocked())) { 205f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola MCInst Relaxed; 206ec3433852dd11e8ff60c9610b4c84468e5935f2bJim Grosbach getAssembler().getBackend().relaxInstruction(Inst, Relaxed); 207ec3433852dd11e8ff60c9610b4c84468e5935f2bJim Grosbach while (getAssembler().getBackend().mayNeedRelaxation(Relaxed)) 208ec3433852dd11e8ff60c9610b4c84468e5935f2bJim Grosbach getAssembler().getBackend().relaxInstruction(Relaxed, Relaxed); 209f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToData(Relaxed); 210f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola return; 211f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola } 212f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 213f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Otherwise emit to a separate fragment. 214f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToFragment(Inst); 215f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola} 216f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 217dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindolavoid MCObjectStreamer::EmitInstToFragment(const MCInst &Inst) { 2184766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky // Always create a new, separate fragment here, because its size can change 2194766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky // during relaxation. 220251040bc18eedfa56d01fe92836e55cfd8c5d990Eli Bendersky MCRelaxableFragment *IF = 221251040bc18eedfa56d01fe92836e55cfd8c5d990Eli Bendersky new MCRelaxableFragment(Inst, getCurrentSectionData()); 222dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola 22350ebe53353f6870e913f7715d6d4fc5a1f5bedd6Eli Friedman SmallString<128> Code; 22450ebe53353f6870e913f7715d6d4fc5a1f5bedd6Eli Friedman raw_svector_ostream VecOS(Code); 225dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, IF->getFixups()); 22650ebe53353f6870e913f7715d6d4fc5a1f5bedd6Eli Friedman VecOS.flush(); 22764d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky IF->getContents().append(Code.begin(), Code.end()); 228dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola} 229dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola 2304766ef41b31e4f97bce1179c3b0398303bf65356Eli Benderskyconst char *BundlingNotImplementedMsg = 2314766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky "Aligned bundling is not implemented for this object format"; 2324766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky 2334766ef41b31e4f97bce1179c3b0398303bf65356Eli Benderskyvoid MCObjectStreamer::EmitBundleAlignMode(unsigned AlignPow2) { 2344766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky llvm_unreachable(BundlingNotImplementedMsg); 2354766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky} 2364766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky 2376c1d4972cf1cd6b6072e31c05f97abb1ed7a8497Eli Benderskyvoid MCObjectStreamer::EmitBundleLock(bool AlignToEnd) { 2384766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky llvm_unreachable(BundlingNotImplementedMsg); 2394766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky} 2404766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky 2414766ef41b31e4f97bce1179c3b0398303bf65356Eli Benderskyvoid MCObjectStreamer::EmitBundleUnlock() { 2424766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky llvm_unreachable(BundlingNotImplementedMsg); 2434766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky} 2444766ef41b31e4f97bce1179c3b0398303bf65356Eli Bendersky 24532a006e606742b1c5401e49607e33717bb5441f0Rafael Espindolavoid MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta, 24632a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola const MCSymbol *LastLabel, 247672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng const MCSymbol *Label, 248672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng unsigned PointerSize) { 24932a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola if (!LastLabel) { 25032a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola EmitDwarfSetLineAddr(LineDelta, Label, PointerSize); 25132a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola return; 25232a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola } 253245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); 25432a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola int64_t Res; 255d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) { 25632a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola MCDwarfLineAddr::Emit(this, LineDelta, Res); 25732a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola return; 25832a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola } 259a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola AddrDelta = ForceExpAbs(AddrDelta); 26032a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola new MCDwarfLineAddrFragment(LineDelta, *AddrDelta, getCurrentSectionData()); 26132a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola} 26232a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola 263245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, 264245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCSymbol *Label) { 265245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); 266245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola int64_t Res; 267245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) { 268245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res); 269245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola return; 270245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 271a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola AddrDelta = ForceExpAbs(AddrDelta); 272245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola new MCDwarfCallFrameFragment(*AddrDelta, getCurrentSectionData()); 273245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 274245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 275e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramervoid MCObjectStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) { 276e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer assert(AddrSpace == 0 && "Address space must be 0!"); 277e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end()); 278e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer} 279e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer 280e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramervoid MCObjectStreamer::EmitValueToAlignment(unsigned ByteAlignment, 281e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer int64_t Value, 282e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer unsigned ValueSize, 283e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer unsigned MaxBytesToEmit) { 284e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer if (MaxBytesToEmit == 0) 285e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer MaxBytesToEmit = ByteAlignment; 286e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer new MCAlignFragment(ByteAlignment, Value, ValueSize, MaxBytesToEmit, 287e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer getCurrentSectionData()); 288e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer 289e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer // Update the maximum alignment on the current section if necessary. 290e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer if (ByteAlignment > getCurrentSectionData()->getAlignment()) 291e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer getCurrentSectionData()->setAlignment(ByteAlignment); 292e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer} 293e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer 294e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramervoid MCObjectStreamer::EmitCodeAlignment(unsigned ByteAlignment, 295e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer unsigned MaxBytesToEmit) { 296e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer EmitValueToAlignment(ByteAlignment, 0, 1, MaxBytesToEmit); 297e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer cast<MCAlignFragment>(getCurrentFragment())->setEmitNops(true); 298e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer} 299e660fc15fe1f1b8a19488f39d0ec09acc79bed0dBenjamin Kramer 300ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbachbool MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset, 301660a4d9e0a15ad25db10d25a1a8caeafc0ebad5eJim Grosbach unsigned char Value) { 302f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola int64_t Res; 303f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola if (Offset->EvaluateAsAbsolute(Res, getAssembler())) { 304f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola new MCOrgFragment(*Offset, Value, getCurrentSectionData()); 305ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbach return false; 306f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola } 307f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola 308f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCSymbol *CurrentPos = getContext().CreateTempSymbol(); 309f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola EmitLabel(CurrentPos); 310f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 311f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola const MCExpr *Ref = 312f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCSymbolRefExpr::Create(CurrentPos, Variant, getContext()); 313f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola const MCExpr *Delta = 314f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Offset, Ref, getContext()); 315f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola 316f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola if (!Delta->EvaluateAsAbsolute(Res, getAssembler())) 317ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbach return true; 318f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola EmitFill(Res, Value, 0); 319ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbach return false; 320e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola} 321e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola 32284bfc2f090639f933df06cc675c4385511516befAkira Hatanaka// Associate GPRel32 fixup with data and resize data area 32384bfc2f090639f933df06cc675c4385511516befAkira Hatanakavoid MCObjectStreamer::EmitGPRel32Value(const MCExpr *Value) { 32484bfc2f090639f933df06cc675c4385511516befAkira Hatanaka MCDataFragment *DF = getOrCreateDataFragment(); 32584bfc2f090639f933df06cc675c4385511516befAkira Hatanaka 32664d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky DF->getFixups().push_back(MCFixup::Create(DF->getContents().size(), 32764d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky Value, FK_GPRel_4)); 32884bfc2f090639f933df06cc675c4385511516befAkira Hatanaka DF->getContents().resize(DF->getContents().size() + 4, 0); 32984bfc2f090639f933df06cc675c4385511516befAkira Hatanaka} 33084bfc2f090639f933df06cc675c4385511516befAkira Hatanaka 331101771ba4d9c2421f836069fcedf9ddc8a0c9dc7Jack Carter// Associate GPRel32 fixup with data and resize data area 332101771ba4d9c2421f836069fcedf9ddc8a0c9dc7Jack Cartervoid MCObjectStreamer::EmitGPRel64Value(const MCExpr *Value) { 333101771ba4d9c2421f836069fcedf9ddc8a0c9dc7Jack Carter MCDataFragment *DF = getOrCreateDataFragment(); 334101771ba4d9c2421f836069fcedf9ddc8a0c9dc7Jack Carter 33564d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky DF->getFixups().push_back(MCFixup::Create(DF->getContents().size(), 33664d9a3233476553fc950f0f2fc6a2cdd2a4c05cfEli Bendersky Value, FK_GPRel_4)); 337101771ba4d9c2421f836069fcedf9ddc8a0c9dc7Jack Carter DF->getContents().resize(DF->getContents().size() + 8, 0); 338101771ba4d9c2421f836069fcedf9ddc8a0c9dc7Jack Carter} 339101771ba4d9c2421f836069fcedf9ddc8a0c9dc7Jack Carter 340f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramervoid MCObjectStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, 341f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramer unsigned AddrSpace) { 342f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramer assert(AddrSpace == 0 && "Address space must be 0!"); 343f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramer // FIXME: A MCFillFragment would be more memory efficient but MCExpr has 344f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramer // problems evaluating expressions across multiple fragments. 345f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramer getOrCreateDataFragment()->getContents().append(NumBytes, FillValue); 346f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramer} 347f0070f2a973ff046ee63de827ab32ff215b369b2Benjamin Kramer 34899b4237c1647156f0e1d3d7e03efdab23ed79778Rafael Espindolavoid MCObjectStreamer::FinishImpl() { 34989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Dump out the dwarf file & directory tables and line tables. 350e6ec02e8afe1bec8f9de5c907a50a6efdee261a0Rafael Espindola const MCSymbol *LineSectionSymbol = NULL; 35189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (getContext().hasDwarfFiles()) 352489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola LineSectionSymbol = MCDwarfFileTable::Emit(this); 35389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 35494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // If we are generating dwarf for assembly source files dump out the sections. 35594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (getContext().getGenDwarfForAssembly()) 356489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCGenDwarfInfo::Emit(this, LineSectionSymbol); 35794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 35883b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar getAssembler().Finish(); 35983b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar} 360