MCObjectStreamer.cpp revision 7768a9dce14431018133cd586f5c8ce3e057f069
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" 201abcd06856df324eac98d4bf5ba673fb77ae6a11Benjamin Kramer#include "llvm/Target/TargetAsmBackend.h" 2189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola#include "llvm/Target/TargetAsmInfo.h" 228dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbarusing namespace llvm; 238dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar 248dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel DunbarMCObjectStreamer::MCObjectStreamer(MCContext &Context, TargetAsmBackend &TAB, 25feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar raw_ostream &OS, MCCodeEmitter *Emitter_) 26feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar : MCStreamer(Context), 27feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar Assembler(new MCAssembler(Context, TAB, 28feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar *Emitter_, *TAB.createObjectWriter(OS), 29feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar OS)), 3083b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar CurSectionData(0) 318dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar{ 328dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar} 338dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar 348dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel DunbarMCObjectStreamer::~MCObjectStreamer() { 351abcd06856df324eac98d4bf5ba673fb77ae6a11Benjamin Kramer delete &Assembler->getBackend(); 361abcd06856df324eac98d4bf5ba673fb77ae6a11Benjamin Kramer delete &Assembler->getEmitter(); 37feb7ba3d9abfa1eb89f6da93c51649baaa931ab8Daniel Dunbar delete &Assembler->getWriter(); 388dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar delete Assembler; 398dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar} 4083b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 418067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. SpencerMCFragment *MCObjectStreamer::getCurrentFragment() const { 428067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer assert(getCurrentSectionData() && "No current section!"); 438067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 448067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer if (!getCurrentSectionData()->empty()) 458067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return &getCurrentSectionData()->getFragmentList().back(); 468067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 478067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return 0; 488067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 498067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 508067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. SpencerMCDataFragment *MCObjectStreamer::getOrCreateDataFragment() const { 518067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer MCDataFragment *F = dyn_cast_or_null<MCDataFragment>(getCurrentFragment()); 528067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer if (!F) 538067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer F = new MCDataFragment(getCurrentSectionData()); 548067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return F; 558067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 568067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 578067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencerconst MCExpr *MCObjectStreamer::AddValueSymbols(const MCExpr *Value) { 588067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer switch (Value->getKind()) { 597597212abced110723f2fee985a7d60557c092ecEvan Cheng case MCExpr::Target: 607597212abced110723f2fee985a7d60557c092ecEvan Cheng cast<MCTargetExpr>(Value)->AddValueSymbols(Assembler); 617597212abced110723f2fee985a7d60557c092ecEvan Cheng break; 627597212abced110723f2fee985a7d60557c092ecEvan Cheng 638067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Constant: 648067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 658067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 668067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Binary: { 678067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value); 688067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(BE->getLHS()); 698067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(BE->getRHS()); 708067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 718067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer } 728067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 738067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::SymbolRef: 748067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer Assembler->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol()); 758067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 768067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 778067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer case MCExpr::Unary: 788067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer AddValueSymbols(cast<MCUnaryExpr>(Value)->getSubExpr()); 798067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer break; 808067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer } 818067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 828067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer return Value; 838067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer} 848067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer 8589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolavoid MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, 8689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola bool isPCRel, unsigned AddrSpace) { 876f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola assert(AddrSpace == 0 && "Address space must be 0!"); 886f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola MCDataFragment *DF = getOrCreateDataFragment(); 896f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola 906f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola // Avoid fixups when possible. 916f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola int64_t AbsValue; 92d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (AddValueSymbols(Value)->EvaluateAsAbsolute(AbsValue, getAssembler())) { 932df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola EmitIntValue(AbsValue, Size, AddrSpace); 942df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola return; 956f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola } 962df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola DF->addFixup(MCFixup::Create(DF->getContents().size(), 97835439a397407e421263bd476e5b18bf787ffb6aRafael Espindola Value, 9889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCFixup::getKindForSize(Size, isPCRel))); 992df042cb32ecb8d2e1d499dfa27d5074c8b40e13Rafael Espindola DF->getContents().resize(DF->getContents().size() + Size, 0); 1006f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola} 1016f95023a7f27075011a6eb7b84e03732b00a785bRafael Espindola 102ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindolavoid MCObjectStreamer::EmitLabel(MCSymbol *Symbol) { 103ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); 1047768a9dce14431018133cd586f5c8ce3e057f069Rafael Espindola assert(getCurrentSection() && "Cannot emit before setting section!"); 105ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 1067768a9dce14431018133cd586f5c8ce3e057f069Rafael Espindola Symbol->setSection(*getCurrentSection()); 107ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 108ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); 109ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 110ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // FIXME: This is wasteful, we don't necessarily need to create a data 111ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment. Instead, we should mark the symbol as pointing into the data 112ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment if it exists, otherwise we should just queue the label and set its 113ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // fragment pointer when we emit the next fragment. 114ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCDataFragment *F = getOrCreateDataFragment(); 115ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola assert(!SD.getFragment() && "Unexpected fragment on symbol data!"); 116ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola SD.setFragment(F); 117ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola SD.setOffset(F->getContents().size()); 118ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola} 119ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola 1203ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindolavoid MCObjectStreamer::EmitULEB128Value(const MCExpr *Value, 1213ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola unsigned AddrSpace) { 122660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola int64_t IntValue; 123d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) { 124660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola EmitULEB128IntValue(IntValue, AddrSpace); 125660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola return; 126660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola } 1273ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola new MCLEBFragment(*Value, false, getCurrentSectionData()); 1283ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola} 1293ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola 1303ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindolavoid MCObjectStreamer::EmitSLEB128Value(const MCExpr *Value, 1313ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola unsigned AddrSpace) { 132660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola int64_t IntValue; 133d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) { 134660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola EmitSLEB128IntValue(IntValue, AddrSpace); 135660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola return; 136660b5fc4d019bf22fbe14dfb81c5b59444fa3506Rafael Espindola } 1373ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola new MCLEBFragment(*Value, true, getCurrentSectionData()); 1383ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola} 1393ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola 140484291c27319668ad99cb87def000254357736fbRafael Espindolavoid MCObjectStreamer::EmitWeakReference(MCSymbol *Alias, 141484291c27319668ad99cb87def000254357736fbRafael Espindola const MCSymbol *Symbol) { 142484291c27319668ad99cb87def000254357736fbRafael Espindola report_fatal_error("This file format doesn't support weak aliases."); 143484291c27319668ad99cb87def000254357736fbRafael Espindola} 144484291c27319668ad99cb87def000254357736fbRafael Espindola 1457768a9dce14431018133cd586f5c8ce3e057f069Rafael Espindolavoid MCObjectStreamer::ChangeSection(const MCSection *Section) { 14683b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar assert(Section && "Cannot switch to a null section!"); 14783b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 14883b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar CurSectionData = &getAssembler().getOrCreateSectionData(*Section); 14983b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar} 15083b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar 151f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindolavoid MCObjectStreamer::EmitInstruction(const MCInst &Inst) { 152f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Scan for values. 153f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola for (unsigned i = Inst.getNumOperands(); i--; ) 154f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola if (Inst.getOperand(i).isExpr()) 155f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola AddValueSymbols(Inst.getOperand(i).getExpr()); 156f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 157f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola getCurrentSectionData()->setHasInstructions(true); 158f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 159f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Now that a machine instruction has been assembled into this section, make 160f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // a line entry for any .loc directive that has been seen. 161f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola MCLineEntry::Make(this, getCurrentSection()); 162f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 163f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // If this instruction doesn't need relaxation, just emit it as data. 164f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola if (!getAssembler().getBackend().MayNeedRelaxation(Inst)) { 165f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToData(Inst); 166f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola return; 167f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola } 168f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 169f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Otherwise, if we are relaxing everything, relax the instruction as much as 170f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // possible and emit it as data. 171f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola if (getAssembler().getRelaxAll()) { 172f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola MCInst Relaxed; 173f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola getAssembler().getBackend().RelaxInstruction(Inst, Relaxed); 174f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola while (getAssembler().getBackend().MayNeedRelaxation(Relaxed)) 175f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola getAssembler().getBackend().RelaxInstruction(Relaxed, Relaxed); 176f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToData(Relaxed); 177f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola return; 178f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola } 179f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 180f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola // Otherwise emit to a separate fragment. 181f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola EmitInstToFragment(Inst); 182f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola} 183f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola 184dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindolavoid MCObjectStreamer::EmitInstToFragment(const MCInst &Inst) { 185dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola MCInstFragment *IF = new MCInstFragment(Inst, getCurrentSectionData()); 186dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola 187dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola raw_svector_ostream VecOS(IF->getCode()); 188dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, IF->getFixups()); 189dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola} 190dedb045c3296c831962c4ae101531c38c273ba89Rafael Espindola 191245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolastatic const MCExpr *BuildSymbolDiff(MCContext &Context, 192245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCSymbol *A, const MCSymbol *B) { 193245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 194245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *ARef = 195245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCSymbolRefExpr::Create(A, Variant, Context); 196245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *BRef = 197245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCSymbolRefExpr::Create(B, Variant, Context); 198245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *AddrDelta = 199245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context); 200245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola return AddrDelta; 201245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 202245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 203245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolastatic const MCExpr *ForceExpAbs(MCObjectStreamer *Streamer, 204245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCContext &Context, const MCExpr* Expr) { 205245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola if (Context.getAsmInfo().hasAggressiveSymbolFolding()) 206245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola return Expr; 207245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 208245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCSymbol *ABS = Context.CreateTempSymbol(); 209245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola Streamer->EmitAssignment(ABS, Expr); 210245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola return MCSymbolRefExpr::Create(ABS, Context); 211245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 212245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 21332a006e606742b1c5401e49607e33717bb5441f0Rafael Espindolavoid MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta, 21432a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola const MCSymbol *LastLabel, 21532a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola const MCSymbol *Label) { 21632a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola if (!LastLabel) { 21789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int PointerSize = getContext().getTargetAsmInfo().getPointerSize(); 21832a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola EmitDwarfSetLineAddr(LineDelta, Label, PointerSize); 21932a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola return; 22032a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola } 221245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); 22232a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola int64_t Res; 223d076482ab7e672d1d65a43809695e8d0d3995203Rafael Espindola if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) { 22432a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola MCDwarfLineAddr::Emit(this, LineDelta, Res); 22532a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola return; 22632a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola } 227245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola AddrDelta = ForceExpAbs(this, getContext(), AddrDelta); 22832a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola new MCDwarfLineAddrFragment(LineDelta, *AddrDelta, getCurrentSectionData()); 22932a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola} 23032a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola 231245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, 232245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCSymbol *Label) { 233245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); 234245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola int64_t Res; 235245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) { 236245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res); 237245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola return; 238245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 239245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola AddrDelta = ForceExpAbs(this, getContext(), AddrDelta); 240245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola new MCDwarfCallFrameFragment(*AddrDelta, getCurrentSectionData()); 241245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 242245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 243e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindolavoid MCObjectStreamer::EmitValueToOffset(const MCExpr *Offset, 244e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola unsigned char Value) { 245e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola new MCOrgFragment(*Offset, Value, getCurrentSectionData()); 246e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola} 247e23930543c0de0adcfec00cd18e9243ad812a167Rafael Espindola 24883b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbarvoid MCObjectStreamer::Finish() { 24989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Dump out the dwarf file & directory tables and line tables. 25089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (getContext().hasDwarfFiles()) 25189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCDwarfFileTable::Emit(this); 25289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 25383b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar getAssembler().Finish(); 25483b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar} 255