MCObjectStreamer.cpp revision e6ec02e8afe1bec8f9de5c907a50a6efdee261a0
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 10835439a397407e421263bd476e5b18bf787ffb6aRafael Espindola#include "llvm/MC/MCAsmInfo.h" 118dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar#include "llvm/MC/MCObjectStreamer.h" 128dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar 138067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer#include "llvm/Support/ErrorHandling.h" 148dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar#include "llvm/MC/MCAssembler.h" 151abcd06856df324eac98d4bf5ba673fb77ae6a11Benjamin Kramer#include "llvm/MC/MCCodeEmitter.h" 1689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola#include "llvm/MC/MCContext.h" 17f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola#include "llvm/MC/MCDwarf.h" 188067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer#include "llvm/MC/MCExpr.h" 19ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola#include "llvm/MC/MCSymbol.h" 2078c10eeaa57d1c6c4b7781d3c0bcb0cfbbc43b5cEvan Cheng#include "llvm/MC/MCAsmBackend.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 478067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. SpencerMCFragment *MCObjectStreamer::getCurrentFragment() const { 488067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer assert(getCurrentSectionData() && "No current section!"); 498067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 508067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer if (!getCurrentSectionData()->empty()) 518067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return &getCurrentSectionData()->getFragmentList().back(); 528067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 538067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return 0; 548067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 558067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 568067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. SpencerMCDataFragment *MCObjectStreamer::getOrCreateDataFragment() const { 578067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer MCDataFragment *F = dyn_cast_or_null<MCDataFragment>(getCurrentFragment()); 588067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer if (!F) 598067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer F = new MCDataFragment(getCurrentSectionData()); 608067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return F; 618067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 628067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 638067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencerconst MCExpr *MCObjectStreamer::AddValueSymbols(const MCExpr *Value) { 648067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer switch (Value->getKind()) { 657597212abced110723f2fee985a7d60557c092ecEvan Cheng case MCExpr::Target: 667597212abced110723f2fee985a7d60557c092ecEvan Cheng cast<MCTargetExpr>(Value)->AddValueSymbols(Assembler); 677597212abced110723f2fee985a7d60557c092ecEvan Cheng break; 687597212abced110723f2fee985a7d60557c092ecEvan Cheng 698067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Constant: 708067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 718067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 728067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Binary: { 738067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value); 748067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(BE->getLHS()); 758067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(BE->getRHS()); 768067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 778067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer } 788067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 798067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::SymbolRef: 808067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer Assembler->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol()); 818067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 828067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 838067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Unary: 848067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(cast<MCUnaryExpr>(Value)->getSubExpr()); 858067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 868067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer } 878067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 888067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return Value; 898067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 908067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 9189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolavoid MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, 92debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola unsigned AddrSpace) { 936f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola assert(AddrSpace == 0 && "Address space must be 0!"); 946f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola MCDataFragment *DF = getOrCreateDataFragment(); 956f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola 966f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola // Avoid fixups when possible. 976f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola int64_t AbsValue; 98d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (AddValueSymbols(Value)->EvaluateAsAbsolute(AbsValue, getAssembler())) { 992df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola EmitIntValue(AbsValue, Size, AddrSpace); 1002df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola return; 1016f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola } 1022df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola DF->addFixup(MCFixup::Create(DF->getContents().size(), 103835439a397407e421263bd476e5b18bf787ffb6aRafael Espindola Value, 104debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola MCFixup::getKindForSize(Size, false))); 1052df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola DF->getContents().resize(DF->getContents().size() + Size, 0); 1066f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola} 1076f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola 108547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindolavoid MCObjectStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { 109547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindola RecordProcStart(Frame); 110547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindola} 111547be2699c547b79a7735858a64921d8ccf180f7Rafael Espindola 1121fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindolavoid MCObjectStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { 1131fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindola RecordProcEnd(Frame); 1141fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindola} 1151fe9737eb49ecb80fbb547f0e16e10a726cd53cfRafael Espindola 116ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindolavoid MCObjectStreamer::EmitLabel(MCSymbol *Symbol) { 117ed708f9c1facb9928ef2f79503e7030c8f25b00dRafael Espindola MCStreamer::EmitLabel(Symbol); 118ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 119ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); 120ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 121ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // FIXME: This is wasteful, we don't necessarily need to create a data 122ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment. Instead, we should mark the symbol as pointing into the data 123ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment if it exists, otherwise we should just queue the label and set its 124ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment pointer when we emit the next fragment. 125ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCDataFragment *F = getOrCreateDataFragment(); 126ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola assert(!SD.getFragment() && "Unexpected fragment on symbol data!"); 127ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola SD.setFragment(F); 128ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola SD.setOffset(F->getContents().size()); 129ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola} 130ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 131e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindolavoid MCObjectStreamer::EmitULEB128Value(const MCExpr *Value) { 132660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola int64_t IntValue; 133d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) { 134e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola EmitULEB128IntValue(IntValue); 135660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola return; 136660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola } 137a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola Value = ForceExpAbs(Value); 1383ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola new MCLEBFragment(*Value, false, getCurrentSectionData()); 1393ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola} 1403ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola 141e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindolavoid MCObjectStreamer::EmitSLEB128Value(const MCExpr *Value) { 142660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola int64_t IntValue; 143d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) { 144e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola EmitSLEB128IntValue(IntValue); 145660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola return; 146660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola } 147a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola Value = ForceExpAbs(Value); 1483ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola new MCLEBFragment(*Value, true, getCurrentSectionData()); 1493ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola} 1503ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola 151484291c27319668ad99cb87def000254357736fbRafael Espindolavoid MCObjectStreamer::EmitWeakReference(MCSymbol *Alias, 152484291c27319668ad99cb87def000254357736fbRafael Espindola const MCSymbol *Symbol) { 153484291c27319668ad99cb87def000254357736fbRafael Espindola report_fatal_error("This file format doesn't support weak aliases."); 154484291c27319668ad99cb87def000254357736fbRafael Espindola} 155484291c27319668ad99cb87def000254357736fbRafael Espindola 1567768a9dce14431018133cd586f5c8ce3e057f069Rafael Espindolavoid MCObjectStreamer::ChangeSection(const MCSection *Section) { 15783b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar assert(Section && "Cannot switch to a null section!"); 15883b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 15983b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar CurSectionData = &getAssembler().getOrCreateSectionData(*Section); 16083b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar} 16183b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 162f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindolavoid MCObjectStreamer::EmitInstruction(const MCInst &Inst) { 163f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Scan for values. 164f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola for (unsigned i = Inst.getNumOperands(); i--; ) 165f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola if (Inst.getOperand(i).isExpr()) 166f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola AddValueSymbols(Inst.getOperand(i).getExpr()); 167f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 168f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola getCurrentSectionData()->setHasInstructions(true); 169f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 170f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Now that a machine instruction has been assembled into this section, make 171f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // a line entry for any .loc directive that has been seen. 172f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola MCLineEntry::Make(this, getCurrentSection()); 173f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 174f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // If this instruction doesn't need relaxation, just emit it as data. 175ec3433852dd11e8ff60c9610b4c84468e5935f2bJim Grosbach if (!getAssembler().getBackend().mayNeedRelaxation(Inst)) { 176f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToData(Inst); 177f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola return; 178f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola } 179f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 180f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Otherwise, if we are relaxing everything, relax the instruction as much as 181f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // possible and emit it as data. 182f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola if (getAssembler().getRelaxAll()) { 183f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola MCInst Relaxed; 184ec3433852dd11e8ff60c9610b4c84468e5935f2bJim Grosbach getAssembler().getBackend().relaxInstruction(Inst, Relaxed); 185ec3433852dd11e8ff60c9610b4c84468e5935f2bJim Grosbach while (getAssembler().getBackend().mayNeedRelaxation(Relaxed)) 186ec3433852dd11e8ff60c9610b4c84468e5935f2bJim Grosbach getAssembler().getBackend().relaxInstruction(Relaxed, Relaxed); 187f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToData(Relaxed); 188f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola return; 189f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola } 190f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 191f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Otherwise emit to a separate fragment. 192f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToFragment(Inst); 193f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola} 194f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 195dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindolavoid MCObjectStreamer::EmitInstToFragment(const MCInst &Inst) { 196dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola MCInstFragment *IF = new MCInstFragment(Inst, getCurrentSectionData()); 197dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola 19850ebe53353f6870e913f7715d6d4fc5a1f5bedd6Eli Friedman SmallString<128> Code; 19950ebe53353f6870e913f7715d6d4fc5a1f5bedd6Eli Friedman raw_svector_ostream VecOS(Code); 200dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, IF->getFixups()); 20150ebe53353f6870e913f7715d6d4fc5a1f5bedd6Eli Friedman VecOS.flush(); 20250ebe53353f6870e913f7715d6d4fc5a1f5bedd6Eli Friedman IF->getCode().append(Code.begin(), Code.end()); 203dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola} 204dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola 20532a006e606742b1c5401e49607e33717bb5441f0Rafael Espindolavoid MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta, 20632a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola const MCSymbol *LastLabel, 207672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng const MCSymbol *Label, 208672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng unsigned PointerSize) { 20932a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola if (!LastLabel) { 21032a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola EmitDwarfSetLineAddr(LineDelta, Label, PointerSize); 21132a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola return; 21232a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola } 213245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); 21432a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola int64_t Res; 215d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) { 21632a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola MCDwarfLineAddr::Emit(this, LineDelta, Res); 21732a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola return; 21832a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola } 219a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola AddrDelta = ForceExpAbs(AddrDelta); 22032a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola new MCDwarfLineAddrFragment(LineDelta, *AddrDelta, getCurrentSectionData()); 22132a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola} 22232a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola 223245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, 224245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCSymbol *Label) { 225245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); 226245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola int64_t Res; 227245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) { 228245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res); 229245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola return; 230245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 231a6f2678f08299f053feb58337fc4322131d99bf4Rafael Espindola AddrDelta = ForceExpAbs(AddrDelta); 232245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola new MCDwarfCallFrameFragment(*AddrDelta, getCurrentSectionData()); 233245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 234245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 235ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbachbool MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset, 236660a4d9e0a15ad25db10d25a1a8caeafc0ebad5eJim Grosbach unsigned char Value) { 237f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola int64_t Res; 238f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola if (Offset->EvaluateAsAbsolute(Res, getAssembler())) { 239f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola new MCOrgFragment(*Offset, Value, getCurrentSectionData()); 240ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbach return false; 241f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola } 242f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola 243f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCSymbol *CurrentPos = getContext().CreateTempSymbol(); 244f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola EmitLabel(CurrentPos); 245f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 246f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola const MCExpr *Ref = 247f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCSymbolRefExpr::Create(CurrentPos, Variant, getContext()); 248f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola const MCExpr *Delta = 249f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Offset, Ref, getContext()); 250f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola 251f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola if (!Delta->EvaluateAsAbsolute(Res, getAssembler())) 252ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbach return true; 253f7ad048f1e122ee4f735398786f4859392f74144Rafael Espindola EmitFill(Res, Value, 0); 254ebd4c05c3cbd61215366d4d16f1c1a2e57e7156dJim Grosbach return false; 255e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola} 256e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola 25784bfc2f090639f933df06cc675c4385511516befAkira Hatanaka// Associate GPRel32 fixup with data and resize data area 25884bfc2f090639f933df06cc675c4385511516befAkira Hatanakavoid MCObjectStreamer::EmitGPRel32Value(const MCExpr *Value) { 25984bfc2f090639f933df06cc675c4385511516befAkira Hatanaka MCDataFragment *DF = getOrCreateDataFragment(); 26084bfc2f090639f933df06cc675c4385511516befAkira Hatanaka 26184bfc2f090639f933df06cc675c4385511516befAkira Hatanaka DF->addFixup(MCFixup::Create(DF->getContents().size(), 26284bfc2f090639f933df06cc675c4385511516befAkira Hatanaka Value, 26384bfc2f090639f933df06cc675c4385511516befAkira Hatanaka FK_GPRel_4)); 26484bfc2f090639f933df06cc675c4385511516befAkira Hatanaka DF->getContents().resize(DF->getContents().size() + 4, 0); 26584bfc2f090639f933df06cc675c4385511516befAkira Hatanaka} 26684bfc2f090639f933df06cc675c4385511516befAkira Hatanaka 26799b4237c1647156f0e1d3d7e03efdab23ed79778Rafael Espindolavoid MCObjectStreamer::FinishImpl() { 26889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Dump out the dwarf file & directory tables and line tables. 269e6ec02e8afe1bec8f9de5c907a50a6efdee261a0Rafael Espindola const MCSymbol *LineSectionSymbol = NULL; 27089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (getContext().hasDwarfFiles()) 271489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola LineSectionSymbol = MCDwarfFileTable::Emit(this); 27289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 27394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // If we are generating dwarf for assembly source files dump out the sections. 27494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (getContext().getGenDwarfForAssembly()) 275489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCGenDwarfInfo::Emit(this, LineSectionSymbol); 27694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 27783b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar getAssembler().Finish(); 27883b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar} 279