17cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby//===- lib/MC/MCDwarf.cpp - MCDwarf implementation ------------------------===// 27cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby// 37cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby// The LLVM Compiler Infrastructure 47cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby// 57cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby// This file is distributed under the University of Illinois Open Source 67cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby// License. See LICENSE.TXT for details. 77cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby// 87cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby//===----------------------------------------------------------------------===// 97cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 107cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/MC/MCDwarf.h" 11d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/ADT/Hashing.h" 12dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/ADT/STLExtras.h" 13d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/ADT/SmallString.h" 14d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/ADT/Twine.h" 15d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/Config/config.h" 16e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCAsmInfo.h" 17e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCContext.h" 18d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCExpr.h" 19e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCObjectFileInfo.h" 20dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/MC/MCObjectStreamer.h" 21e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCRegisterInfo.h" 22c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines#include "llvm/MC/MCSection.h" 23c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCSymbol.h" 247cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/Debug.h" 25de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar#include "llvm/Support/EndianStream.h" 26fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola#include "llvm/Support/ErrorHandling.h" 272d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach#include "llvm/Support/LEB128.h" 2894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby#include "llvm/Support/Path.h" 2994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby#include "llvm/Support/SourceMgr.h" 30d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/Support/raw_ostream.h" 31c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 32f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarusing namespace llvm; 33c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 34c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigandstatic inline uint64_t ScaleAddrDelta(MCContext &Context, uint64_t AddrDelta) { 3599cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling unsigned MinInsnLength = Context.getAsmInfo()->getMinInstAlignment(); 36c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand if (MinInsnLength == 1) 37c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta; 38c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand if (AddrDelta % MinInsnLength != 0) { 39c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // TODO: report this error, but really only once. 40c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ; 41c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 42c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand return AddrDelta / MinInsnLength; 43c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 44c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 45c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 46c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This is called when an instruction is assembled into the specified section 47c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// and if there is information from the last .loc directive that has yet to have 48c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// a line entry made for it is made. 49c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 50de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainarvoid MCDwarfLineEntry::Make(MCObjectStreamer *MCOS, MCSection *Section) { 51c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!MCOS->getContext().getDwarfLocSeen()) 52c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 53c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 54c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at in the current section for use in the line entry. 556948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *LineSym = MCOS->getContext().createTempSymbol(); 56de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar // Set the value of the symbol to use for the MCDwarfLineEntry. 57c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineSym); 58c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 59c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the current .loc info saved in the context. 60c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCDwarfLoc &DwarfLoc = MCOS->getContext().getCurrentDwarfLoc(); 61c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 62c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a (local) line entry with the symbol and the current .loc info. 63de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar MCDwarfLineEntry LineEntry(LineSym, DwarfLoc); 64c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 65c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // clear DwarfLocSeen saying the current .loc info is now used. 666948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCOS->getContext().clearDwarfLocSeen(); 67c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 68c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Add the line entry to this section's entries. 6936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->getContext() 7036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines .getMCDwarfLineTable(MCOS->getContext().getDwarfCompileUnitID()) 7136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines .getMCLineSections() 7236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines .addLineEntry(LineEntry, Section); 73c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 74c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 75c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 76c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This helper routine returns an expression of End - Start + IntVal . 772684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach// 785fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindolastatic inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS, 795fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &Start, 805fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &End, 815fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola int IntVal) { 82c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 83c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res = 846948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbolRefExpr::create(&End, Variant, MCOS.getContext()); 85c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *RHS = 866948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbolRefExpr::create(&Start, Variant, MCOS.getContext()); 87c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res1 = 886948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCBinaryExpr::create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext()); 89c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res2 = 906948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCConstantExpr::create(IntVal, MCOS.getContext()); 91c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res3 = 926948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCBinaryExpr::create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext()); 93c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return Res3; 94c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 95c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 96c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 97c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf line table for the specified section from the entries 98c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// in the LineSection. 99c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 10036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hinesstatic inline void 1016948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga NainarEmitDwarfLineTable(MCObjectStreamer *MCOS, MCSection *Section, 102de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar const MCLineSection::MCDwarfLineEntryCollection &LineEntries) { 103c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned FileNum = 1; 104c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned LastLine = 1; 105c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Column = 0; 106c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; 107c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Isa = 0; 10836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned Discriminator = 0; 109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCSymbol *LastLabel = nullptr; 110c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 111de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar // Loop through each MCDwarfLineEntry and encode the dwarf line number table. 112de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar for (const MCDwarfLineEntry &LineEntry : LineEntries) { 113de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar int64_t LineDelta = static_cast<int64_t>(LineEntry.getLine()) - LastLine; 114c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 115de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (FileNum != LineEntry.getFileNum()) { 116de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar FileNum = LineEntry.getFileNum(); 117c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_file, 1); 1183ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(FileNum); 119c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 120de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (Column != LineEntry.getColumn()) { 121de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar Column = LineEntry.getColumn(); 122c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_column, 1); 1233ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Column); 124c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 125de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (Discriminator != LineEntry.getDiscriminator()) { 126de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar Discriminator = LineEntry.getDiscriminator(); 12736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned Size = getULEB128Size(Discriminator); 12836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitIntValue(dwarf::DW_LNS_extended_op, 1); 12936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitULEB128IntValue(Size + 1); 13036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitIntValue(dwarf::DW_LNE_set_discriminator, 1); 13136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitULEB128IntValue(Discriminator); 13236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 133de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (Isa != LineEntry.getIsa()) { 134de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar Isa = LineEntry.getIsa(); 135c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_isa, 1); 1363ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Isa); 137c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 138de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if ((LineEntry.getFlags() ^ Flags) & DWARF2_FLAG_IS_STMT) { 139de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar Flags = LineEntry.getFlags(); 140c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_negate_stmt, 1); 141c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 142de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (LineEntry.getFlags() & DWARF2_FLAG_BASIC_BLOCK) 143c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_basic_block, 1); 144de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (LineEntry.getFlags() & DWARF2_FLAG_PROLOGUE_END) 145c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_prologue_end, 1); 146de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (LineEntry.getFlags() & DWARF2_FLAG_EPILOGUE_BEGIN) 147c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_epilogue_begin, 1); 148c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 149de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar MCSymbol *Label = LineEntry.getLabel(); 150c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 151c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // At this point we want to emit/create the sequence to encode the delta in 152c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // line numbers and the increment of the address from the previous Label 153c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and the current Label. 15499cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *asmInfo = MCOS->getContext().getAsmInfo(); 155672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label, 15699cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling asmInfo->getPointerSize()); 157c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 158de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar Discriminator = 0; 159de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar LastLine = LineEntry.getLine(); 160c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LastLabel = Label; 161c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 162c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 163c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Emit a DW_LNE_end_sequence for the end of the section. 1644c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar // Use the section end label to compute the address delta and use INT64_MAX 1654c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar // as the line delta which is the signal that this is actually a 1664c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar // DW_LNE_end_sequence. 1674c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar MCSymbol *SectionEnd = MCOS->endSection(Section); 168c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 1694c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar // Switch back the dwarf line section, in case endSection had to switch the 1704c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar // section. 1714c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar MCContext &Ctx = MCOS->getContext(); 1724c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar MCOS->SwitchSection(Ctx.getObjectFileInfo()->getDwarfLineSection()); 17389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1744c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar const MCAsmInfo *AsmInfo = Ctx.getAsmInfo(); 175672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd, 1764c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar AsmInfo->getPointerSize()); 177c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 178c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 179c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 180c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf file and the line tables. 181c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 182f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid MCDwarfLineTable::Emit(MCObjectStreamer *MCOS, 183f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCDwarfLineTableParams Params) { 18489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 18536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 18636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines auto &LineTables = context.getMCDwarfLineTables(); 18736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 18836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Bail out early so we don't switch to the debug_line section needlessly and 18936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // in doing so create an unnecessary (if empty) section. 19036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (LineTables.empty()) 19136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return; 19236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 193c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section where the table will be emitted into. 194e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection()); 195c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 19643213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren // Handle the rest of the Compile Units. 19736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (const auto &CUIDTablePair : LineTables) 198f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar CUIDTablePair.second.EmitCU(MCOS, Params); 19936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines} 20036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 201f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid MCDwarfDwoLineTable::Emit(MCStreamer &MCOS, 202f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCDwarfLineTableParams Params) const { 203f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCOS.EmitLabel(Header.Emit(&MCOS, Params, None).second); 20436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines} 20536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 206f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarstd::pair<MCSymbol *, MCSymbol *> 207f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga NainarMCDwarfLineTableHeader::Emit(MCStreamer *MCOS, 208f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCDwarfLineTableParams Params) const { 20936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines static const char StandardOpcodeLengths[] = { 21036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 0, // length of DW_LNS_copy 21136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1, // length of DW_LNS_advance_pc 21236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1, // length of DW_LNS_advance_line 21336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1, // length of DW_LNS_set_file 21436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1, // length of DW_LNS_set_column 21536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 0, // length of DW_LNS_negate_stmt 21636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 0, // length of DW_LNS_set_basic_block 21736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 0, // length of DW_LNS_const_add_pc 21836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1, // length of DW_LNS_fixed_advance_pc 21936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 0, // length of DW_LNS_set_prologue_end 22036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 0, // length of DW_LNS_set_epilogue_begin 22136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1 // DW_LNS_set_isa 22236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines }; 223f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar assert(array_lengthof(StandardOpcodeLengths) >= 224f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar (Params.DWARF2LineOpcodeBase - 1U)); 225f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar return Emit(MCOS, Params, makeArrayRef(StandardOpcodeLengths, 226f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Params.DWARF2LineOpcodeBase - 1)); 22743213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren} 22843213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren 22937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hinesstatic const MCExpr *forceExpAbs(MCStreamer &OS, const MCExpr* Expr) { 23037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MCContext &Context = OS.getContext(); 23137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines assert(!isa<MCSymbolRefExpr>(Expr)); 23237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (Context.getAsmInfo()->hasAggressiveSymbolFolding()) 23337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines return Expr; 23437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines 2356948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *ABS = Context.createTempSymbol(); 23637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines OS.EmitAssignment(ABS, Expr); 2376948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar return MCSymbolRefExpr::create(ABS, Context); 23837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines} 23937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines 24037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hinesstatic void emitAbsValue(MCStreamer &OS, const MCExpr *Value, unsigned Size) { 24137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines const MCExpr *ABS = forceExpAbs(OS, Value); 24237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines OS.EmitValue(ABS, Size); 24337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines} 24437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines 24536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hinesstd::pair<MCSymbol *, MCSymbol *> 246f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga NainarMCDwarfLineTableHeader::Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params, 24736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines ArrayRef<char> StandardOpcodeLengths) const { 24843213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren MCContext &context = MCOS->getContext(); 24943213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren 25043213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren // Create a symbol at the beginning of the line table. 25136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCSymbol *LineStartSym = Label; 25243213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren if (!LineStartSym) 2536948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar LineStartSym = context.createTempSymbol(); 25443213cf1ac05b4198fcf9fa85d7da85477daafd1Manman Ren // Set the value of the symbol, as we are at the start of the line table. 255c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineStartSym); 256c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 257c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the section (to be set when we get there). 2586948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *LineEndSym = context.createTempSymbol(); 259c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 260c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // The first 4 bytes is the total length of the information for this 261c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // compilation unit (not including these 4 bytes for the length). 26237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines emitAbsValue(*MCOS, 26337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MakeStartMinusEndExpr(*MCOS, *LineStartSym, *LineEndSym, 4), 4); 264c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 265c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Next 2 bytes is the Version, which is Dwarf 2. 266c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(2, 2); 267c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 268c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the prologue (to be set when we get there). 2696948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *ProEndSym = context.createTempSymbol(); // Lprologue_end 270c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 271c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Length of the prologue, is the next 4 bytes. Which is the start of the 272c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section to the end of the prologue. Not including the 4 bytes for the 273c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // total length, the 2 bytes for the version, and these 4 bytes for the 274c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // length of the prologue. 27537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines emitAbsValue( 27637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines *MCOS, 27737ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MakeStartMinusEndExpr(*MCOS, *LineStartSym, *ProEndSym, (4 + 2 + 4)), 4); 278c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 279c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Parameters of the state machine, are next. 28099cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling MCOS->EmitIntValue(context.getAsmInfo()->getMinInstAlignment(), 1); 281c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_DEFAULT_IS_STMT, 1); 282f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCOS->EmitIntValue(Params.DWARF2LineBase, 1); 283f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCOS->EmitIntValue(Params.DWARF2LineRange, 1); 28436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitIntValue(StandardOpcodeLengths.size() + 1, 1); 285c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 286c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Standard opcode lengths 28736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (char Length : StandardOpcodeLengths) 28836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitIntValue(Length, 1); 289c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 290c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the directory and file tables. 291c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 292c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // First the directory table. 293c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 0; i < MCDwarfDirs.size(); i++) { 29468ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(MCDwarfDirs[i]); // the DirectoryName 29568ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(StringRef("\0", 1)); // the null term. of the string 296c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 297c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the directory list 298c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 299c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Second the file table. 300c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 1; i < MCDwarfFiles.size(); i++) { 30136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines assert(!MCDwarfFiles[i].Name.empty()); 30236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitBytes(MCDwarfFiles[i].Name); // FileName 30368ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(StringRef("\0", 1)); // the null term. of the string 3043ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola // the Directory num 30536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitULEB128IntValue(MCDwarfFiles[i].DirIndex); 306c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // last modification timestamp (always 0) 307c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // filesize (always 0) 308c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 309c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the file list 310c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 311c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the prologue, so set the value of the symbol at the 312c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end of the prologue (that was used in a previous expression). 313c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(ProEndSym); 314c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 31536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return std::make_pair(LineStartSym, LineEndSym); 31636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines} 31736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 318f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid MCDwarfLineTable::EmitCU(MCObjectStreamer *MCOS, 319f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCDwarfLineTableParams Params) const { 320f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCSymbol *LineEndSym = Header.Emit(MCOS, Params).second; 32136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 322c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the line tables. 32336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (const auto &LineSec : MCLineSections.getMCLineEntries()) 32436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines EmitDwarfLineTable(MCOS, LineSec.first, LineSec.second); 325c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 326c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the section, so set the value of the symbol at the end 327c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // of this section (that was used in a previous expression). 328c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineEndSym); 32936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines} 330489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola 33136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hinesunsigned MCDwarfLineTable::getFile(StringRef &Directory, StringRef &FileName, 33236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned FileNumber) { 33336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return Header.getFile(Directory, FileName, FileNumber); 33436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines} 33536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 33636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hinesunsigned MCDwarfLineTableHeader::getFile(StringRef &Directory, 33736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines StringRef &FileName, 33836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned FileNumber) { 33936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Directory == CompilationDir) 34036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Directory = ""; 34136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (FileName.empty()) { 34236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines FileName = "<stdin>"; 34336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Directory = ""; 34436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 34536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines assert(!FileName.empty()); 34636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (FileNumber == 0) { 347de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar // File numbers start with 1 and/or after any file numbers 348de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar // allocated by inline-assembler .file directives. 349de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar FileNumber = MCDwarfFiles.empty() ? 1 : MCDwarfFiles.size(); 3506948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar SmallString<256> Buffer; 35137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines auto IterBool = SourceIdMap.insert( 3526948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar std::make_pair((Directory + Twine('\0') + FileName).toStringRef(Buffer), 3536948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar FileNumber)); 35437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (!IterBool.second) 35537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines return IterBool.first->second; 35636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 35736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Make space for this FileNumber in the MCDwarfFiles vector if needed. 35836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCDwarfFiles.resize(FileNumber + 1); 35936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 36036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Get the new MCDwarfFile slot for this FileNumber. 36136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCDwarfFile &File = MCDwarfFiles[FileNumber]; 36236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 36336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // It is an error to use see the same number more than once. 36436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!File.Name.empty()) 36536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return 0; 36636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 36736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Directory.empty()) { 36836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Separate the directory part from the basename of the FileName. 36936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines StringRef tFileName = sys::path::filename(FileName); 37036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!tFileName.empty()) { 37136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Directory = sys::path::parent_path(FileName); 37236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!Directory.empty()) 37336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines FileName = tFileName; 37436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 37536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 37636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 37736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Find or make an entry in the MCDwarfDirs vector for this Directory. 37836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Capture directory name. 37936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned DirIndex; 38036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Directory.empty()) { 38136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // For FileNames with no directories a DirIndex of 0 is used. 38236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines DirIndex = 0; 38336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } else { 38436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines DirIndex = 0; 38536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (unsigned End = MCDwarfDirs.size(); DirIndex < End; DirIndex++) { 38636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (Directory == MCDwarfDirs[DirIndex]) 38736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines break; 38836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 38936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (DirIndex >= MCDwarfDirs.size()) 39036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCDwarfDirs.push_back(Directory); 39136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // The DirIndex is one based, as DirIndex of 0 is used for FileNames with 39236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // no directories. MCDwarfDirs[] is unlike MCDwarfFiles[] in that the 39336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // directory names are stored at MCDwarfDirs[DirIndex-1] where FileNames 39436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // are stored at MCDwarfFiles[FileNumber].Name . 39536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines DirIndex++; 39636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 39736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 39836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines File.Name = FileName; 39936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines File.DirIndex = DirIndex; 40036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 40136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // return the allocated FileNumber. 40236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return FileNumber; 403c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 404c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 405c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to emit the encoding to a streamer. 406f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid MCDwarfLineAddr::Emit(MCStreamer *MCOS, MCDwarfLineTableParams Params, 407f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar int64_t LineDelta, uint64_t AddrDelta) { 408c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand MCContext &Context = MCOS->getContext(); 409c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 410c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 411f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCDwarfLineAddr::Encode(Context, Params, LineDelta, AddrDelta, OS); 41268ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(OS.str()); 413c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 414c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 415f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar/// Given a special op, return the address skip amount (in units of 416f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar/// DWARF2_LINE_MIN_INSN_LENGTH). 417f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarstatic uint64_t SpecialAddr(MCDwarfLineTableParams Params, uint64_t op) { 418f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar return (op - Params.DWARF2LineOpcodeBase) / Params.DWARF2LineRange; 419f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar} 420f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar 421c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas. 422f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid MCDwarfLineAddr::Encode(MCContext &Context, MCDwarfLineTableParams Params, 423f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar int64_t LineDelta, uint64_t AddrDelta, 424f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar raw_ostream &OS) { 425c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t Temp, Opcode; 426c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby bool NeedCopy = false; 427c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 428f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar // The maximum address skip amount that can be encoded with a special op. 429f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar uint64_t MaxSpecialAddrDelta = SpecialAddr(Params, 255); 430f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar 431c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Scale the address delta by the minimum instruction length. 432c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand AddrDelta = ScaleAddrDelta(Context, AddrDelta); 433c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 434c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // A LineDelta of INT64_MAX is a signal that this is actually a 4352684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the 436c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end_sequence to emit the matrix entry. 437c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == INT64_MAX) { 438f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar if (AddrDelta == MaxSpecialAddrDelta) 439c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 4404c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar else if (AddrDelta) { 441c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 4422d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach encodeULEB128(AddrDelta, OS); 443c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 444c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_extended_op); 445c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(1); 446c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNE_end_sequence); 447c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 448c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 449c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 450c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the line delta by the base. 451f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Temp = LineDelta - Params.DWARF2LineBase; 452c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 453c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // If the line increment is out of range of a special opcode, we must encode 454c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // it with DW_LNS_advance_line. 455de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (Temp >= Params.DWARF2LineRange || 456de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar Temp + Params.DWARF2LineOpcodeBase > 255) { 457c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_line); 4582d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach encodeSLEB128(LineDelta, OS); 459c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 460c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineDelta = 0; 461f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Temp = 0 - Params.DWARF2LineBase; 462c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby NeedCopy = true; 463c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 464c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 465c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Use DW_LNS_copy instead of a "line +0, addr +0" special opcode. 466c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == 0 && AddrDelta == 0) { 467c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 468c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 469c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 470c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 471c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the opcode by the special opcode base. 472f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Temp += Params.DWARF2LineOpcodeBase; 473c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 474c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Avoid overflow when addr_delta is large. 475f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar if (AddrDelta < 256 + MaxSpecialAddrDelta) { 476c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using a special opcode. 477f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Opcode = Temp + AddrDelta * Params.DWARF2LineRange; 478c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 479c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 480c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 481c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 482c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 483c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using DW_LNS_const_add_pc followed by special op. 484f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Opcode = Temp + (AddrDelta - MaxSpecialAddrDelta) * Params.DWARF2LineRange; 485c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 486c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 487c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 488c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 489c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 490c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 491c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 492c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Otherwise use DW_LNS_advance_pc. 493c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 4942d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach encodeULEB128(AddrDelta, OS); 495c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 496c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (NeedCopy) 497c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 498de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar else { 499de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar assert(Temp <= 255 && "Buggy special opcode encoding."); 500c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Temp); 501de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar } 502c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 503c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 50494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// Utility function to write a tuple for .debug_abbrev. 50594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderbystatic void EmitAbbrev(MCStreamer *MCOS, uint64_t Name, uint64_t Form) { 50694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(Name); 50794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(Form); 50894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 50994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 51094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits 51194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// the data for .debug_abbrev section which contains three DIEs. 51294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderbystatic void EmitGenDwarfAbbrev(MCStreamer *MCOS) { 51394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 51494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection()); 51594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 51694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_TAG_compile_unit DIE abbrev (1). 51794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(1); 51894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_compile_unit); 51994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1); 520de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar EmitAbbrev(MCOS, dwarf::DW_AT_stmt_list, context.getDwarfVersion() >= 4 521de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar ? dwarf::DW_FORM_sec_offset 522de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar : dwarf::DW_FORM_data4); 523de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar if (context.getGenDwarfSectionSyms().size() > 1 && 524de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar context.getDwarfVersion() >= 3) { 525de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar EmitAbbrev(MCOS, dwarf::DW_AT_ranges, context.getDwarfVersion() >= 4 526de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar ? dwarf::DW_FORM_sec_offset 527de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar : dwarf::DW_FORM_data4); 528c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } else { 529c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr); 530c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines EmitAbbrev(MCOS, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr); 531c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } 53294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string); 53336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!context.getCompilationDir().empty()) 53436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines EmitAbbrev(MCOS, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string); 53594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef DwarfDebugFlags = context.getDwarfDebugFlags(); 53694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (!DwarfDebugFlags.empty()) 53794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string); 53894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_producer, dwarf::DW_FORM_string); 53994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_language, dwarf::DW_FORM_data2); 54094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 54194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 54238fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // DW_TAG_label DIE abbrev (2). 54394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(2); 54438fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_label); 54594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1); 54694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string); 54794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data4); 54894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data4); 54994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr); 55094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag); 55194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 55294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 55394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_TAG_unspecified_parameters DIE abbrev (3). 55494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(3); 55594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_unspecified_parameters); 55694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_no, 1); 55794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 55894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 55994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Terminate the abbreviations for this compilation unit. 56094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 56194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 56294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 56394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the data for 564c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines// .debug_aranges section. This section contains a header and a table of pairs 565c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines// of PointerSize'ed values for the address and size of section(s) with line 566c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines// table entries. 56715ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonovstatic void EmitGenDwarfAranges(MCStreamer *MCOS, 56815ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov const MCSymbol *InfoSectionSymbol) { 56994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 57094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 571c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines auto &Sections = context.getGenDwarfSectionSyms(); 57294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection()); 57494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // This will be the length of the .debug_aranges section, first account for 57694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // the size of each item in the header (see below where we emit these items). 57794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int Length = 4 + 2 + 4 + 1 + 1; 57894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Figure the padding after the header before the table of address and size 58094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // pairs who's values are PointerSize'ed. 58199cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *asmInfo = context.getAsmInfo(); 58299cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling int AddrSize = asmInfo->getPointerSize(); 58394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int Pad = 2 * AddrSize - (Length & (2 * AddrSize - 1)); 58494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Pad == 2 * AddrSize) 58594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Pad = 0; 58694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += Pad; 58794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 58894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the size of the pair of PointerSize'ed values for the address and size 589c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // of each section we have in the table. 590c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines Length += 2 * AddrSize * Sections.size(); 59194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // And the pair of terminating zeros. 59294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += 2 * AddrSize; 59394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 59494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 59594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Emit the header for this section. 59694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte length not including the 4 byte value for the length. 59794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(Length - 4, 4); 59894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 2 byte version, which is 2. 59994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(2, 2); 60094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte offset to the compile unit in the .debug_info from the start 60115ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov // of the .debug_info. 60215ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov if (InfoSectionSymbol) 60337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MCOS->EmitSymbolValue(InfoSectionSymbol, 4, 60437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines asmInfo->needsDwarfSectionOffsetDirective()); 60515ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov else 60615ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov MCOS->EmitIntValue(0, 4); 60794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of an address. 60894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(AddrSize, 1); 60994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of a segment descriptor, we use a value of zero. 61094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 61194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Align the header with the padding if needed, before we put out the table. 61294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby for(int i = 0; i < Pad; i++) 61394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 61494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 615c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // Now emit the table of pairs of PointerSize'ed values for the section 616c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // addresses and sizes. 6176948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar for (MCSection *Sec : Sections) { 6186948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar const MCSymbol *StartSymbol = Sec->getBeginSymbol(); 6196948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *EndSymbol = Sec->getEndSymbol(context); 620c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(StartSymbol && "StartSymbol must not be NULL"); 621c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(EndSymbol && "EndSymbol must not be NULL"); 622c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 6236948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar const MCExpr *Addr = MCSymbolRefExpr::create( 624c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines StartSymbol, MCSymbolRefExpr::VK_None, context); 625c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines const MCExpr *Size = MakeStartMinusEndExpr(*MCOS, 626c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines *StartSymbol, *EndSymbol, 0); 627c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitValue(Addr, AddrSize); 62837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines emitAbsValue(*MCOS, Size, AddrSize); 629c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } 63094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 63194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // And finally the pair of terminating zeros. 63294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, AddrSize); 63394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, AddrSize); 63494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 63594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 63694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the data for 63794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// .debug_info section which contains three parts. The header, the compile_unit 63838fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby// DIE and a list of label DIEs. 639489d67927172941bf59b9f4829ab8910814fea24Rafael Espindolastatic void EmitGenDwarfInfo(MCStreamer *MCOS, 640489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola const MCSymbol *AbbrevSectionSymbol, 641c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines const MCSymbol *LineSectionSymbol, 642c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines const MCSymbol *RangesSectionSymbol) { 64394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 64494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 6452684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection()); 64694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 64794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create a symbol at the start and end of this section used in here for the 64894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // expression to calculate the length in the header. 6496948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *InfoStart = context.createTempSymbol(); 65094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(InfoStart); 6516948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *InfoEnd = context.createTempSymbol(); 65294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 65394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // First part: the header. 65494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 65594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte total length of the information for this compilation unit, not 65694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // including these 4 bytes. 65794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Length = MakeStartMinusEndExpr(*MCOS, *InfoStart, *InfoEnd, 4); 65837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines emitAbsValue(*MCOS, Length, 4); 65994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines // The 2 byte DWARF version. 661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCOS->EmitIntValue(context.getDwarfVersion(), 2); 66294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 66337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines const MCAsmInfo &AsmInfo = *context.getAsmInfo(); 66494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte offset to the debug abbrevs from the start of the .debug_abbrev, 66594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // it is at the start of that section so this is zero. 66637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (AbbrevSectionSymbol == nullptr) 667489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitIntValue(0, 4); 66837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines else 66937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MCOS->EmitSymbolValue(AbbrevSectionSymbol, 4, 67037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines AsmInfo.needsDwarfSectionOffsetDirective()); 67194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67299cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *asmInfo = context.getAsmInfo(); 67399cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling int AddrSize = asmInfo->getPointerSize(); 67494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of an address. 67594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(AddrSize, 1); 67694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Second part: the compile_unit DIE. 67894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The DW_TAG_compile_unit DIE abbrev (1). 68094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(1); 68194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 68294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_AT_stmt_list, a 4 byte offset from the start of the .debug_line section, 68394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // which is at the start of that section so this is zero. 68437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (LineSectionSymbol) 68537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MCOS->EmitSymbolValue(LineSectionSymbol, 4, 68637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines AsmInfo.needsDwarfSectionOffsetDirective()); 68737ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines else 688489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitIntValue(0, 4); 68994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 690c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (RangesSectionSymbol) { 691c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // There are multiple sections containing code, so we must use the 692c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // .debug_ranges sections. 69394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 694c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // AT_ranges, the 4 byte offset from the start of the .debug_ranges section 695c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // to the address range list for this compilation unit. 696c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitSymbolValue(RangesSectionSymbol, 4); 697c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } else { 698c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // If we only have one non-empty code section, we can use the simpler 699c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // AT_low_pc and AT_high_pc attributes. 700c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 701c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // Find the first (and only) non-empty text section 702c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines auto &Sections = context.getGenDwarfSectionSyms(); 703c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines const auto TextSection = Sections.begin(); 704c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(TextSection != Sections.end() && "No text section found"); 705c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 7066948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *StartSymbol = (*TextSection)->getBeginSymbol(); 7076948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *EndSymbol = (*TextSection)->getEndSymbol(context); 708c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(StartSymbol && "StartSymbol must not be NULL"); 709c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(EndSymbol && "EndSymbol must not be NULL"); 710c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 711c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // AT_low_pc, the first address of the default .text section. 7126948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar const MCExpr *Start = MCSymbolRefExpr::create( 713c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines StartSymbol, MCSymbolRefExpr::VK_None, context); 714c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitValue(Start, AddrSize); 715c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 716c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // AT_high_pc, the last address of the default .text section. 7176948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar const MCExpr *End = MCSymbolRefExpr::create( 718c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines EndSymbol, MCSymbolRefExpr::VK_None, context); 719c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitValue(End, AddrSize); 720c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } 72194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 72294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_name, the name of the source file. Reconstruct from the first directory 72394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // and file table entries. 72436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines const SmallVectorImpl<std::string> &MCDwarfDirs = context.getMCDwarfDirs(); 72594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (MCDwarfDirs.size() > 0) { 72668ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(MCDwarfDirs[0]); 727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCOS->EmitBytes(sys::path::get_separator()); 72894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 72936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines const SmallVectorImpl<MCDwarfFile> &MCDwarfFiles = 73094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->getContext().getMCDwarfFiles(); 73136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitBytes(MCDwarfFiles[1].Name); 73294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 73394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 73494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_comp_dir, the working directory the assembly was done in. 73536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!context.getCompilationDir().empty()) { 73636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitBytes(context.getCompilationDir()); 73736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 73836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 73994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 74094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_APPLE_flags, the command line arguments of the assembler tool. 74194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef DwarfDebugFlags = context.getDwarfDebugFlags(); 74294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (!DwarfDebugFlags.empty()){ 74368ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(DwarfDebugFlags); 74494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 74594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 74694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 74794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_producer, the version of the assembler tool. 74875c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby StringRef DwarfDebugProducer = context.getDwarfDebugProducer(); 74937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (!DwarfDebugProducer.empty()) 75075c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby MCOS->EmitBytes(DwarfDebugProducer); 75137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines else 75237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MCOS->EmitBytes(StringRef("llvm-mc (based on LLVM " PACKAGE_VERSION ")")); 75394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 75494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 75594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_language, a 4 byte value. We use DW_LANG_Mips_Assembler as the dwarf2 75694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // draft has no standard code for assembler. 75794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LANG_Mips_Assembler, 2); 75894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 75938fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // Third part: the list of label DIEs. 76094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 76111c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Loop on saved info for dwarf labels and create the DIEs for them. 762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines const std::vector<MCGenDwarfLabelEntry> &Entries = 763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCOS->getContext().getMCGenDwarfLabelEntries(); 764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines for (const auto &Entry : Entries) { 76538fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // The DW_TAG_label DIE abbrev (2). 76694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(2); 76794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 76894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_name, of the label without any leading underbar. 769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCOS->EmitBytes(Entry.getName()); 77094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 77194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 77294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_decl_file, index into the file table. 773dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCOS->EmitIntValue(Entry.getFileNumber(), 4); 77494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 77594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_decl_line, source line number. 776dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCOS->EmitIntValue(Entry.getLineNumber(), 4); 77794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 77894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_low_pc, start address of the label. 7796948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar const MCExpr *AT_low_pc = MCSymbolRefExpr::create(Entry.getLabel(), 78094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbolRefExpr::VK_None, context); 78136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCOS->EmitValue(AT_low_pc, AddrSize); 78294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 78394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_AT_prototyped, a one byte flag value of 0 saying we have no prototype. 78494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 78594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 78694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The DW_TAG_unspecified_parameters DIE abbrev (3). 78794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(3); 78894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 78994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the NULL DIE terminating the DW_TAG_unspecified_parameters DIE's. 79094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 79194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 79294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 79394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the NULL DIE terminating the Compile Unit DIE's. 79494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 79594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 79694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Now set the value of the symbol at the end of the info section. 79794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(InfoEnd); 79894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 79994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 800c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines// When generating dwarf for assembly source files this emits the data for 801c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines// .debug_ranges section. We only emit one range list, which spans all of the 802c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines// executable sections of this file. 803c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hinesstatic void EmitGenDwarfRanges(MCStreamer *MCOS) { 804c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCContext &context = MCOS->getContext(); 805c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines auto &Sections = context.getGenDwarfSectionSyms(); 806c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 807c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines const MCAsmInfo *AsmInfo = context.getAsmInfo(); 808c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines int AddrSize = AsmInfo->getPointerSize(); 809c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 810c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfRangesSection()); 811c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 8126948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar for (MCSection *Sec : Sections) { 8136948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar const MCSymbol *StartSymbol = Sec->getBeginSymbol(); 8146948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *EndSymbol = Sec->getEndSymbol(context); 815c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(StartSymbol && "StartSymbol must not be NULL"); 816c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(EndSymbol && "EndSymbol must not be NULL"); 817c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 818c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // Emit a base address selection entry for the start of this section 8196948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar const MCExpr *SectionStartAddr = MCSymbolRefExpr::create( 820c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines StartSymbol, MCSymbolRefExpr::VK_None, context); 821de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar MCOS->emitFill(AddrSize, 0xFF); 822c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitValue(SectionStartAddr, AddrSize); 823c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 824c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // Emit a range list entry spanning this section 825c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines const MCExpr *SectionSize = MakeStartMinusEndExpr(*MCOS, 826c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines *StartSymbol, *EndSymbol, 0); 827c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitIntValue(0, AddrSize); 82837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines emitAbsValue(*MCOS, SectionSize, AddrSize); 829c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } 830c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 831c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // Emit end of list entry 832c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitIntValue(0, AddrSize); 833c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitIntValue(0, AddrSize); 834c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines} 835c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 83694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 83794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the Dwarf 83894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// sections. 83994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 84036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hinesvoid MCGenDwarfInfo::Emit(MCStreamer *MCOS) { 84194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 842c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 843c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // Create the dwarf sections in this order (.debug_line already created). 84499cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *AsmInfo = context.getAsmInfo(); 84515ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov bool CreateDwarfSectionSymbols = 84699cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling AsmInfo->doesDwarfUseRelocationsAcrossSections(); 84736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MCSymbol *LineSectionSymbol = nullptr; 84836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (CreateDwarfSectionSymbols) 84936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines LineSectionSymbol = MCOS->getDwarfLineTableSymbol(0); 850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCSymbol *AbbrevSectionSymbol = nullptr; 851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCSymbol *InfoSectionSymbol = nullptr; 852f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCSymbol *RangesSectionSymbol = nullptr; 853c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 854c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // Create end symbols for each section, and remove empty sections 855c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->getContext().finalizeDwarfSections(*MCOS); 856c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 857c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // If there are no sections to generate debug info for, we don't need 858c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // to do anything 859c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (MCOS->getContext().getGenDwarfSectionSyms().empty()) 860c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines return; 861c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 86237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines // We only use the .debug_ranges section if we have multiple code sections, 86337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines // and we are emitting a DWARF version which supports it. 864c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines const bool UseRangesSection = 86537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MCOS->getContext().getGenDwarfSectionSyms().size() > 1 && 86637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MCOS->getContext().getDwarfVersion() >= 3; 867c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines CreateDwarfSectionSymbols |= UseRangesSection; 868c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 86994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection()); 87015ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov if (CreateDwarfSectionSymbols) { 8716948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar InfoSectionSymbol = context.createTempSymbol(); 87215ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov MCOS->EmitLabel(InfoSectionSymbol); 87315ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov } 87494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection()); 87515ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov if (CreateDwarfSectionSymbols) { 8766948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar AbbrevSectionSymbol = context.createTempSymbol(); 877489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitLabel(AbbrevSectionSymbol); 878489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } 879c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (UseRangesSection) { 880c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfRangesSection()); 881c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (CreateDwarfSectionSymbols) { 8826948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar RangesSectionSymbol = context.createTempSymbol(); 883c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->EmitLabel(RangesSectionSymbol); 884c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } 885c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } 88694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 887c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert((RangesSectionSymbol != NULL) || !UseRangesSection); 888c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 889c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection()); 89094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 89194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_aranges section. 89215ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov EmitGenDwarfAranges(MCOS, InfoSectionSymbol); 89394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 894c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (UseRangesSection) 895c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines EmitGenDwarfRanges(MCOS); 896c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines 89794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_abbrev section. 89894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitGenDwarfAbbrev(MCOS); 89994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 90094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_info section. 901c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines EmitGenDwarfInfo(MCOS, AbbrevSectionSymbol, LineSectionSymbol, 902c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines RangesSectionSymbol); 90394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 90494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 90594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 90694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this is called when symbol 90794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// for a label is created. If this symbol is not a temporary and is in the 90894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// section that dwarf is being generated for, save the needed info to create 90911c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby// a dwarf label. 91094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 91111c2defa9157bd589cb322218c718c4492ed5746Kevin Enderbyvoid MCGenDwarfLabelEntry::Make(MCSymbol *Symbol, MCStreamer *MCOS, 91294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby SourceMgr &SrcMgr, SMLoc &Loc) { 913c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // We won't create dwarf labels for temporary symbols. 91494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Symbol->isTemporary()) 91594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 91694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 917c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // We won't create dwarf labels for symbols in sections that we are not 918c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines // generating debug info for. 919c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (!context.getGenDwarfSectionSyms().count(MCOS->getCurrentSection().first)) 92094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 92194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 92211c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // The dwarf label's name does not have the symbol name's leading 92394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // underbar if any. 92494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef Name = Symbol->getName(); 92594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Name.startswith("_")) 92694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Name = Name.substr(1, Name.size()-1); 92794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 92811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Get the dwarf file number to be used for the dwarf label. 92994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby unsigned FileNumber = context.getGenDwarfFileNumber(); 93094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 93194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Finding the line number is the expensive part which is why we just don't 93211c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // pass it in as for some symbols we won't create a dwarf label. 933c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines unsigned CurBuffer = SrcMgr.FindBufferContainingLoc(Loc); 93494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby unsigned LineNumber = SrcMgr.FindLineNumber(Loc, CurBuffer); 93594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 93694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // We create a temporary symbol for use for the AT_high_pc and AT_low_pc 93794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // values so that they don't have things like an ARM thumb bit from the 93894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // original symbol. So when used they won't get a low bit set after 93994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // relocation. 9406948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *Label = context.createTempSymbol(); 94194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(Label); 94294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 94394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create and entry for the info and add it to the other entries. 944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCOS->getContext().addMCGenDwarfLabelEntry( 945dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines MCGenDwarfLabelEntry(Name, FileNumber, LineNumber, Label)); 94694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 94794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 94889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic int getDataAlignmentFactor(MCStreamer &streamer) { 94989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 95099cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *asmInfo = context.getAsmInfo(); 95199cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling int size = asmInfo->getCalleeSaveStackSlotSize(); 95299cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling if (asmInfo->isStackGrowthDirectionUp()) 95389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return size; 9541be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng else 9551be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng return -size; 95689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 95789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 958abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic unsigned getSizeForEncoding(MCStreamer &streamer, 959abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned symbolEncoding) { 96025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCContext &context = streamer.getContext(); 96125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned format = symbolEncoding & 0x0f; 96225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola switch (format) { 963858143816d43e58b17bfd11cb1b57afbd7f0f893Craig Topper default: llvm_unreachable("Unknown Encoding"); 96425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_absptr: 96525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_signed: 96699cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling return context.getAsmInfo()->getPointerSize(); 96725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata2: 96825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata2: 969abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 2; 97025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata4: 97125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata4: 972abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 4; 97325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata8: 97425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata8: 975abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 8; 97625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola } 977abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola} 978abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola 97937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hinesstatic void emitFDESymbol(MCObjectStreamer &streamer, const MCSymbol &symbol, 98037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines unsigned symbolEncoding, bool isEH) { 981a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola MCContext &context = streamer.getContext(); 98299cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *asmInfo = context.getAsmInfo(); 98399cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCExpr *v = asmInfo->getExprForFDESymbol(&symbol, 98499cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling symbolEncoding, 98599cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling streamer); 986abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 98736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (asmInfo->doDwarfFDESymbolsUseAbsDiff() && isEH) 98837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines emitAbsValue(streamer, v, size); 98936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines else 99036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines streamer.EmitValue(v, size); 99125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 99225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 993bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindolastatic void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol, 994bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned symbolEncoding) { 995bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola MCContext &context = streamer.getContext(); 99699cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *asmInfo = context.getAsmInfo(); 99799cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCExpr *v = asmInfo->getExprForPersonalitySymbol(&symbol, 99899cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling symbolEncoding, 99999cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling streamer); 1000bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 1001debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitValue(v, size); 1002bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola} 1003bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola 100425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolanamespace { 1005f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarclass FrameEmitterImpl { 1006f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar int CFAOffset = 0; 1007f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar int InitialCFAOffset = 0; 1008f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool IsEH; 1009f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCObjectStreamer &Streamer; 1010f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar 1011f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarpublic: 1012f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar FrameEmitterImpl(bool IsEH, MCObjectStreamer &Streamer) 1013f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar : IsEH(IsEH), Streamer(Streamer) {} 1014f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar 1015f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar /// Emit the unwind information in a compact way. 1016f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar void EmitCompactUnwind(const MCDwarfFrameInfo &frame); 1017f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar 1018f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCSymbol &EmitCIE(const MCSymbol *personality, 1019f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar unsigned personalityEncoding, const MCSymbol *lsda, 1020f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool IsSignalFrame, unsigned lsdaEncoding, 1021f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool IsSimple); 1022f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar void EmitFDE(const MCSymbol &cieStart, const MCDwarfFrameInfo &frame, 1023f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool LastInSection, const MCSymbol &SectionStart); 1024f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar void EmitCFIInstructions(ArrayRef<MCCFIInstruction> Instrs, 1025f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCSymbol *BaseLabel); 1026f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar void EmitCFIInstruction(const MCCFIInstruction &Instr); 1027f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar}; 10283c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 10293c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling} // end anonymous namespace 10303c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 103137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hinesstatic void emitEncodingByte(MCObjectStreamer &Streamer, unsigned Encoding) { 10323c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.EmitIntValue(Encoding, 1); 103325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 103425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 1035f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid FrameEmitterImpl::EmitCFIInstruction(const MCCFIInstruction &Instr) { 1036fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola int dataAlignmentFactor = getDataAlignmentFactor(Streamer); 1037ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines auto *MRI = Streamer.getContext().getRegisterInfo(); 103889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1039fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola switch (Instr.getOperation()) { 1040f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola case MCCFIInstruction::OpRegister: { 1041f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola unsigned Reg1 = Instr.getRegister(); 1042f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola unsigned Reg2 = Instr.getRegister2(); 1043ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines if (!IsEH) { 1044ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Reg1 = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg1, true), false); 1045ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Reg2 = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg2, true), false); 1046ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines } 1047f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_register, 1); 1048f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.EmitULEB128IntValue(Reg1); 1049f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.EmitULEB128IntValue(Reg2); 1050f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola return; 1051f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola } 105283ba58e5f0a5afbb23d7d2092d817accded4455aVenkatraman Govindaraju case MCCFIInstruction::OpWindowSave: { 105383ba58e5f0a5afbb23d7d2092d817accded4455aVenkatraman Govindaraju Streamer.EmitIntValue(dwarf::DW_CFA_GNU_window_save, 1); 105483ba58e5f0a5afbb23d7d2092d817accded4455aVenkatraman Govindaraju return; 105583ba58e5f0a5afbb23d7d2092d817accded4455aVenkatraman Govindaraju } 10567f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpUndefined: { 1057ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 1058c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_undefined, 1); 1059c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 1060c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola return; 1061c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola } 10627f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpAdjustCfaOffset: 10637f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpDefCfaOffset: { 10647f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola const bool IsRelative = 10657f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Instr.getOperation() == MCCFIInstruction::OpAdjustCfaOffset; 106689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 10677f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); 10685d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola 10697f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (IsRelative) 1070ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola CFAOffset += Instr.getOffset(); 10717f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola else 1072ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola CFAOffset = -Instr.getOffset(); 107389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 10747f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitULEB128IntValue(CFAOffset); 10757f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10767f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola return; 10777f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola } 10787f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpDefCfa: { 1079ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines unsigned Reg = Instr.getRegister(); 1080ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines if (!IsEH) 1081ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false); 10827f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); 1083ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Streamer.EmitULEB128IntValue(Reg); 1084ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola CFAOffset = -Instr.getOffset(); 10857f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitULEB128IntValue(CFAOffset); 10867f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10877f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola return; 10887f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola } 10897f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10907f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpDefCfaRegister: { 1091ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines unsigned Reg = Instr.getRegister(); 1092ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines if (!IsEH) 1093ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false); 10947f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); 1095ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Streamer.EmitULEB128IntValue(Reg); 10967f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10977f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola return; 10987f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola } 10997f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 11007f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpOffset: 11017f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRelOffset: { 11027f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola const bool IsRelative = 11037f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Instr.getOperation() == MCCFIInstruction::OpRelOffset; 110489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1105ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 1106ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines if (!IsEH) 1107ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false); 1108ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 1109ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola int Offset = Instr.getOffset(); 111025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola if (IsRelative) 111125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset -= CFAOffset; 111225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset = Offset / dataAlignmentFactor; 111389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 111489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Offset < 0) { 1115fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1); 1116fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitULEB128IntValue(Reg); 1117fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitSLEB128IntValue(Offset); 111889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else if (Reg < 64) { 1119fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1); 1120eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 112189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 1122fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1); 1123eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 1124eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 1125fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 1126fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 1127fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 11287f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRememberState: 1129fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1); 1130fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 11317f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRestoreState: 1132fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1); 1133fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 11347f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpSameValue: { 1135ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 1136c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1); 1137e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 1138c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola return; 1139c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola } 11407f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRestore: { 1141ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 1142ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines if (!IsEH) 1143ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false); 1144ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore | Reg, 1); 1145ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola return; 1146ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola } 1147f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar case MCCFIInstruction::OpGnuArgsSize: { 1148f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitIntValue(dwarf::DW_CFA_GNU_args_size, 1); 1149f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitULEB128IntValue(Instr.getOffset()); 1150f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar return; 1151f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar } 11527f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpEscape: 115368ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher Streamer.EmitBytes(Instr.getValues()); 11546f0b181bc70318f8d5d4b9bdead7fc748677fe2aRafael Espindola return; 1155fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 1156fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola llvm_unreachable("Unhandled case in switch"); 1157fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola} 1158fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 115937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines/// Emit frame instructions to describe the layout of the frame. 1160f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid FrameEmitterImpl::EmitCFIInstructions(ArrayRef<MCCFIInstruction> Instrs, 116125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel) { 1162de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar for (const MCCFIInstruction &Instr : Instrs) { 1163fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *Label = Instr.getLabel(); 1164fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Throw out move if the label is invalid. 1165fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. 1166fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1167fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Advance row if new location. 1168fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (BaseLabel && Label) { 1169fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *ThisSym = Label; 1170fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (ThisSym != BaseLabel) { 1171f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym); 1172fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola BaseLabel = ThisSym; 1173fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 117489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 1175fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1176f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar EmitCFIInstruction(Instr); 117789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 117889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 117989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 118037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines/// Emit the unwind information in a compact way. 1181f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid FrameEmitterImpl::EmitCompactUnwind(const MCDwarfFrameInfo &Frame) { 1182e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling MCContext &Context = Streamer.getContext(); 1183e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = Context.getObjectFileInfo(); 1184e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1185e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // range-start range-length compact-unwind-enc personality-func lsda 1186e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _foo LfooEnd-_foo 0x00000023 0 0 1187e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _bar LbarEnd-_bar 0x00000025 __gxx_personality except_tab1 1188e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1189e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .section __LD,__compact_unwind,regular,debug 1190e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1191e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _foo 1192e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _foo 1193e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L1,LfooEnd-_foo 1194e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L1 1195e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01010001 1196e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 1197e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 1198e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1199e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _bar 1200e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _bar 1201e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L2,LbarEnd-_bar 1202e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L2 1203e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01020011 1204e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad __gxx_personality 1205e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad except_tab1 1206e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1207e52e3f2c020354c8e0e966b719152b08349d0334Bill Wendling uint32_t Encoding = Frame.CompactUnwindEncoding; 1208fa2b25c57300dc9c518ea35bbc9dc8658fdbf454Bill Wendling if (!Encoding) return; 120962c75ad4301f07c94d7a231d2da9f9cd47b7824cBill Wendling bool DwarfEHFrameOnly = (Encoding == MOFI->getCompactUnwindDwarfEHFrameOnly()); 12106a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling 12114bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling // The encoding needs to know we have an LSDA. 121262c75ad4301f07c94d7a231d2da9f9cd47b7824cBill Wendling if (!DwarfEHFrameOnly && Frame.Lsda) 12134bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Encoding |= 0x40000000; 12144bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling 1215e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Start 1216dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines unsigned FDEEncoding = MOFI->getFDEEncoding(); 12179056e9032001a2d47057cecec5e39895cbc31799Bill Wendling unsigned Size = getSizeForEncoding(Streamer, FDEEncoding); 1218c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines Streamer.EmitSymbolValue(Frame.Begin, Size); 1219e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1220e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Length 1221e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCExpr *Range = MakeStartMinusEndExpr(Streamer, *Frame.Begin, 1222e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling *Frame.End, 0); 122337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines emitAbsValue(Streamer, Range, 4); 12249287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 12259287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling // Compact Encoding 12269287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_udata4); 12279287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Streamer.EmitIntValue(Encoding, Size); 12289287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 12299056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // Personality Function 12304bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr); 123162c75ad4301f07c94d7a231d2da9f9cd47b7824cBill Wendling if (!DwarfEHFrameOnly && Frame.Personality) 12329056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Personality, Size); 12334498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 12344498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No personality fn 12359056e9032001a2d47057cecec5e39895cbc31799Bill Wendling 12369056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // LSDA 12374498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Size = getSizeForEncoding(Streamer, Frame.LsdaEncoding); 123862c75ad4301f07c94d7a231d2da9f9cd47b7824cBill Wendling if (!DwarfEHFrameOnly && Frame.Lsda) 12399056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Lsda, Size); 12404498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 12414498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No LSDA 1242e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling} 1243e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 12446948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainarstatic unsigned getCIEVersion(bool IsEH, unsigned DwarfVersion) { 12456948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar if (IsEH) 12466948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar return 1; 12476948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar switch (DwarfVersion) { 12486948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar case 2: 12496948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar return 1; 12506948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar case 3: 12516948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar return 3; 12526948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar case 4: 1253de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar case 5: 12546948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar return 4; 12556948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar } 12566948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar llvm_unreachable("Unknown version"); 12576948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar} 12586948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar 1259f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarconst MCSymbol &FrameEmitterImpl::EmitCIE(const MCSymbol *personality, 126025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 126125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 126216d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola bool IsSignalFrame, 126336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines unsigned lsdaEncoding, 126436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines bool IsSimple) { 1265f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCContext &context = Streamer.getContext(); 126699cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCRegisterInfo *MRI = context.getRegisterInfo(); 1267e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); 1268514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 12696948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *sectionStart = context.createTempSymbol(); 1270f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitLabel(sectionStart); 1271514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 12726948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *sectionEnd = context.createTempSymbol(); 127389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 127489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 1275f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCExpr *Length = 1276f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MakeStartMinusEndExpr(Streamer, *sectionStart, *sectionEnd, 4); 1277f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitAbsValue(Streamer, Length, 4); 127889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 127989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE ID 128040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned CIE_ID = IsEH ? 0 : -1; 1281f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitIntValue(CIE_ID, 4); 128289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 128389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Version 12846948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar uint8_t CIEVersion = getCIEVersion(IsEH, context.getDwarfVersion()); 1285f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitIntValue(CIEVersion, 1); 128689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 128789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation String 128889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola SmallString<8> Augmentation; 128940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 129040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "z"; 129140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) 129240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "P"; 129340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 129440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "L"; 129540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "R"; 129616d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola if (IsSignalFrame) 129716d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Augmentation += "S"; 1298f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitBytes(Augmentation); 129940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 1300f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitIntValue(0, 1); 130189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 13026948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar if (CIEVersion >= 4) { 13036948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar // Address Size 1304f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitIntValue(context.getAsmInfo()->getPointerSize(), 1); 13056948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar 13066948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar // Segment Descriptor Size 1307f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitIntValue(0, 1); 13086948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar } 13096948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar 131089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Code Alignment Factor 1311f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitULEB128IntValue(context.getAsmInfo()->getMinInstAlignment()); 131289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 131389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Data Alignment Factor 1314f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitSLEB128IntValue(getDataAlignmentFactor(Streamer)); 131589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 131689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Return Address Register 1317c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (CIEVersion == 1) { 1318c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines assert(MRI->getRARegister() <= 255 && 1319c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines "DWARF 2 encodes return_address_register in one byte"); 1320f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitIntValue(MRI->getDwarfRegNum(MRI->getRARegister(), IsEH), 1); 1321c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } else { 1322f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitULEB128IntValue( 1323ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines MRI->getDwarfRegNum(MRI->getRARegister(), IsEH)); 1324c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines } 132589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 132689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data Length (optional) 13271f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 13281f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola unsigned augmentationLength = 0; 132940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 133040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 133140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 133240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 133340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 1334f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar augmentationLength += getSizeForEncoding(Streamer, personalityEncoding); 133540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 133640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 133740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 133840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 13391f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola augmentationLength += 1; 13401f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 1341f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitULEB128IntValue(augmentationLength); 134289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 134340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data (optional) 134440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 134540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 1346f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitEncodingByte(Streamer, personalityEncoding); 134740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 1348f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar EmitPersonality(Streamer, *personality, personalityEncoding); 134940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 13503c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 135140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 1352f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitEncodingByte(Streamer, lsdaEncoding); 13533c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 135440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 1355f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitEncodingByte(Streamer, MOFI->getFDEEncoding()); 1356bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 135789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 135889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Initial Instructions 135989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 136099cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *MAI = context.getAsmInfo(); 136136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!IsSimple) { 136236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines const std::vector<MCCFIInstruction> &Instructions = 136336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MAI->getInitialFrameState(); 1364f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar EmitCFIInstructions(Instructions, nullptr); 136536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } 136689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 13674c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar InitialCFAOffset = CFAOffset; 13684c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar 136989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 1370f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitValueToAlignment(IsEH ? 4 : MAI->getPointerSize()); 137189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1372f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitLabel(sectionEnd); 137389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return *sectionStart; 137489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 137589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1376f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarvoid FrameEmitterImpl::EmitFDE(const MCSymbol &cieStart, 1377f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCDwarfFrameInfo &frame, 1378f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool LastInSection, 1379f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCSymbol &SectionStart) { 1380f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MCContext &context = Streamer.getContext(); 13816948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *fdeStart = context.createTempSymbol(); 13826948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *fdeEnd = context.createTempSymbol(); 1383e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); 138489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 13854c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar CFAOffset = InitialCFAOffset; 13864c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar 138789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 1388f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCExpr *Length = MakeStartMinusEndExpr(Streamer, *fdeStart, *fdeEnd, 0); 1389f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitAbsValue(Streamer, Length, 4); 139089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1391f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitLabel(fdeStart); 1392e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola 139389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE Pointer 139499cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling const MCAsmInfo *asmInfo = context.getAsmInfo(); 13950d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola if (IsEH) { 1396f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCExpr *offset = 1397f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MakeStartMinusEndExpr(Streamer, cieStart, *fdeStart, 0); 1398f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitAbsValue(Streamer, offset, 4); 139999cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling } else if (!asmInfo->doesDwarfUseRelocationsAcrossSections()) { 1400f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCExpr *offset = 1401f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MakeStartMinusEndExpr(Streamer, SectionStart, cieStart, 0); 1402f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitAbsValue(Streamer, offset, 4); 14030d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } else { 1404f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitSymbolValue(&cieStart, 4); 14050d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } 14062541c41f3e2af94585e14353a91f02facd65e415Bill Wendling 140789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Begin 1408dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines unsigned PCEncoding = 1409dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines IsEH ? MOFI->getFDEEncoding() : (unsigned)dwarf::DW_EH_PE_absptr; 1410f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar unsigned PCSize = getSizeForEncoding(Streamer, PCEncoding); 1411f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitFDESymbol(Streamer, *frame.Begin, PCEncoding, IsEH); 141289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 141389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Range 1414f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCExpr *Range = 1415f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar MakeStartMinusEndExpr(Streamer, *frame.Begin, *frame.End, 0); 1416f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitAbsValue(Streamer, Range, PCSize); 141789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 141840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 141940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data Length 142040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned augmentationLength = 0; 14211f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 142240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 1423f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar augmentationLength += getSizeForEncoding(Streamer, frame.LsdaEncoding); 14241f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 1425f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitULEB128IntValue(augmentationLength); 142689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 142740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data 142840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 1429f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar emitFDESymbol(Streamer, *frame.Lsda, frame.LsdaEncoding, true); 143040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 14314892dff07e7d99eb37aee868c4f2c91e9c7eba14Rafael Espindola 143289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Call Frame Instructions 1433f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar EmitCFIInstructions(frame.Instructions, frame.Begin); 14345bba08425374ca36fe5fbc7423ce1a09858e4097Rafael Espindola 143589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 1436f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar // The size of a .eh_frame section has to be a multiple of the alignment 1437f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar // since a null CIE is interpreted as the end. Old systems overaligned 1438f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar // .eh_frame, so we do too and account for it in the last FDE. 1439f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar unsigned Align = LastInSection ? asmInfo->getPointerSize() : PCSize; 1440f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitValueToAlignment(Align); 1441dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola 1442f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Streamer.EmitLabel(fdeEnd); 144389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 144489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 144519282365147f498a60463d250dbed2f8e1b81861Benjamin Kramernamespace { 1446f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainarstruct CIEKey { 1447f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar static const CIEKey getEmptyKey() { 1448f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar return CIEKey(nullptr, 0, -1, false, false); 1449f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar } 1450f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar static const CIEKey getTombstoneKey() { 1451f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar return CIEKey(nullptr, -1, 0, false, false); 1452f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar } 145319282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer 1454f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar CIEKey(const MCSymbol *Personality, unsigned PersonalityEncoding, 1455f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar unsigned LsdaEncoding, bool IsSignalFrame, bool IsSimple) 1456f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar : Personality(Personality), PersonalityEncoding(PersonalityEncoding), 1457f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar LsdaEncoding(LsdaEncoding), IsSignalFrame(IsSignalFrame), 1458f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar IsSimple(IsSimple) {} 1459f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCSymbol *Personality; 1460f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar unsigned PersonalityEncoding; 1461f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar unsigned LsdaEncoding; 1462f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool IsSignalFrame; 1463f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool IsSimple; 1464f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar}; 1465f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar} // anonymous namespace 1466bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 1467bdc3167c086dd4358e24692075db5e7784140843Rafael Espindolanamespace llvm { 1468f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainartemplate <> struct DenseMapInfo<CIEKey> { 1469f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar static CIEKey getEmptyKey() { return CIEKey::getEmptyKey(); } 1470f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar static CIEKey getTombstoneKey() { return CIEKey::getTombstoneKey(); } 1471f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar static unsigned getHashValue(const CIEKey &Key) { 1472f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar return static_cast<unsigned>( 1473f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar hash_combine(Key.Personality, Key.PersonalityEncoding, Key.LsdaEncoding, 1474f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Key.IsSignalFrame, Key.IsSimple)); 1475f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar } 1476f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar static bool isEqual(const CIEKey &LHS, const CIEKey &RHS) { 1477f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar return LHS.Personality == RHS.Personality && 1478f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar LHS.PersonalityEncoding == RHS.PersonalityEncoding && 1479f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar LHS.LsdaEncoding == RHS.LsdaEncoding && 1480f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar LHS.IsSignalFrame == RHS.IsSignalFrame && 1481f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar LHS.IsSimple == RHS.IsSimple; 1482f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar } 1483f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar}; 1484f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar} // namespace llvm 1485bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 1486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid MCDwarfFrameEmitter::Emit(MCObjectStreamer &Streamer, MCAsmBackend *MAB, 1487dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines bool IsEH) { 1488da11df0c22f5d0ba2e2be3ae4a7076c806233db8Bill Wendling Streamer.generateCompactUnwindEncodings(MAB); 1489da11df0c22f5d0ba2e2be3ae4a7076c806233db8Bill Wendling 1490a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCContext &Context = Streamer.getContext(); 149179b40f10c00d38f81272bc683bd94e24607f3897Bill Wendling const MCObjectFileInfo *MOFI = Context.getObjectFileInfo(); 1492f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar FrameEmitterImpl Emitter(IsEH, Streamer); 149337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getDwarfFrameInfos(); 14941424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 1495d8ab8e9707e6170218ce82516d15b36f54b4bc1cBill Wendling // Emit the compact unwind info if available. 149636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines bool NeedsEHFrameSection = !MOFI->getSupportsCompactUnwindWithoutEHFrame(); 1497c60e252ef6d795170c3f32e276c8f6f77d56783eBill Wendling if (IsEH && MOFI->getCompactUnwindSection()) { 1498c60e252ef6d795170c3f32e276c8f6f77d56783eBill Wendling bool SectionEmitted = false; 1499de2d8694e25a814696358e95141f4b1aa4d8847ePirama Arumuga Nainar for (const MCDwarfFrameInfo &Frame : FrameArray) { 150032ec93d431c54b6227a978201813398ffaaeff17Bob Wilson if (Frame.CompactUnwindEncoding == 0) continue; 150132ec93d431c54b6227a978201813398ffaaeff17Bob Wilson if (!SectionEmitted) { 150232ec93d431c54b6227a978201813398ffaaeff17Bob Wilson Streamer.SwitchSection(MOFI->getCompactUnwindSection()); 150399cb622041a0839c7dfcf0263c5102a305a0fdb5Bill Wendling Streamer.EmitValueToAlignment(Context.getAsmInfo()->getPointerSize()); 150432ec93d431c54b6227a978201813398ffaaeff17Bob Wilson SectionEmitted = true; 1505c60e252ef6d795170c3f32e276c8f6f77d56783eBill Wendling } 150636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines NeedsEHFrameSection |= 150736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Frame.CompactUnwindEncoding == 150836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MOFI->getCompactUnwindDwarfEHFrameOnly(); 1509f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Emitter.EmitCompactUnwind(Frame); 15101424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling } 1511c60e252ef6d795170c3f32e276c8f6f77d56783eBill Wendling } 15121424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 151336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!NeedsEHFrameSection) return; 151436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 15156948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSection &Section = 15166948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar IsEH ? *const_cast<MCObjectFileInfo *>(MOFI)->getEHFrameSection() 15176948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar : *MOFI->getDwarfFrameSection(); 151836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1519a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.SwitchSection(&Section); 15206948897e478cbd66626159776a8017b3c18579b9Pirama Arumuga Nainar MCSymbol *SectionStart = Context.createTempSymbol(); 1521a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(SectionStart); 1522a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling 1523c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines DenseMap<CIEKey, const MCSymbol *> CIEStarts; 1524d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 1525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines const MCSymbol *DummyDebugKey = nullptr; 1526f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar bool CanOmitDwarf = MOFI->getOmitDwarfIfHaveCompactUnwind(); 1527f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar for (auto I = FrameArray.begin(), E = FrameArray.end(); I != E;) { 1528f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar const MCDwarfFrameInfo &Frame = *I; 1529f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar ++I; 1530f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar if (CanOmitDwarf && Frame.CompactUnwindEncoding != 153136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MOFI->getCompactUnwindDwarfEHFrameOnly()) 153236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // Don't generate an EH frame if we don't need one. I.e., it's taken care 153336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // of by the compact unwind encoding. 153436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines continue; 153536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 1536a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling CIEKey Key(Frame.Personality, Frame.PersonalityEncoding, 153736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Frame.LsdaEncoding, Frame.IsSignalFrame, Frame.IsSimple); 1538a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey; 1539a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling if (!CIEStart) 1540f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar CIEStart = &Emitter.EmitCIE(Frame.Personality, Frame.PersonalityEncoding, 1541f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Frame.Lsda, Frame.IsSignalFrame, 1542f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Frame.LsdaEncoding, Frame.IsSimple); 1543e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1544f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar Emitter.EmitFDE(*CIEStart, Frame, I == E, *SectionStart); 1545dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola } 154689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 1547245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1548dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid MCDwarfFrameEmitter::EmitAdvanceLoc(MCObjectStreamer &Streamer, 1549245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint64_t AddrDelta) { 1550c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand MCContext &Context = Streamer.getContext(); 1551245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola SmallString<256> Tmp; 1552245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola raw_svector_ostream OS(Tmp); 1553c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand MCDwarfFrameEmitter::EncodeAdvanceLoc(Context, AddrDelta, OS); 155468ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher Streamer.EmitBytes(OS.str()); 1555245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1556245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1557c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigandvoid MCDwarfFrameEmitter::EncodeAdvanceLoc(MCContext &Context, 1558c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand uint64_t AddrDelta, 15594eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola raw_ostream &OS) { 1560c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand // Scale the address delta by the minimum instruction length. 1561c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand AddrDelta = ScaleAddrDelta(Context, AddrDelta); 1562c1f4a4b2640dfc871bacacef53a95f1c96a9fe48Ulrich Weigand 15633b78cdc57ae25ff021fd67171a7c82d533477a19Rafael Espindola if (AddrDelta == 0) { 15644eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUIntN(6, AddrDelta)) { 1565245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint8_t Opcode = dwarf::DW_CFA_advance_loc | AddrDelta; 1566245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << Opcode; 15674eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<8>(AddrDelta)) { 1568245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc1); 1569245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(AddrDelta); 15704eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<16>(AddrDelta)) { 1571245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc2); 1572f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar if (Context.getAsmInfo()->isLittleEndian()) 1573f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar support::endian::Writer<support::little>(OS).write<uint16_t>(AddrDelta); 1574f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar else 1575f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar support::endian::Writer<support::big>(OS).write<uint16_t>(AddrDelta); 1576245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } else { 1577245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola assert(isUInt<32>(AddrDelta)); 1578245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc4); 1579f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar if (Context.getAsmInfo()->isLittleEndian()) 1580f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar support::endian::Writer<support::little>(OS).write<uint32_t>(AddrDelta); 1581f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar else 1582f3ef5332fa3f4d5ec72c178a2b19dac363a19383Pirama Arumuga Nainar support::endian::Writer<support::big>(OS).write<uint32_t>(AddrDelta); 1583245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 1584245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1585