MCDwarf.cpp revision 75c9b9384f50e9387f24dd7ce6af403cbda6d19a
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" 12d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/ADT/SmallString.h" 13d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/ADT/Twine.h" 14d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/Config/config.h" 15e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCAsmInfo.h" 16e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCContext.h" 17d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCExpr.h" 18e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCObjectFileInfo.h" 19e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCObjectWriter.h" 20e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCRegisterInfo.h" 21ad8aaa069cfdb3bdc32b1becc8881f67b5272e14Rafael Espindola#include "llvm/MC/MCStreamer.h" 22c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCSymbol.h" 237cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/Debug.h" 24fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola#include "llvm/Support/ErrorHandling.h" 252d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach#include "llvm/Support/LEB128.h" 2694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby#include "llvm/Support/Path.h" 2794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby#include "llvm/Support/SourceMgr.h" 28d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/Support/raw_ostream.h" 297cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyusing namespace llvm; 307cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 31c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Given a special op, return the address skip amount (in units of 32c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// DWARF2_LINE_MIN_INSN_LENGTH. 33c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) 34c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 35c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// The maximum address skip amount that can be encoded with a special op. 36c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) 37c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 38c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// First special line opcode - leave room for the standard opcodes. 39c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: If you want to change this, you'll have to update the 402684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach// "standard_opcode_lengths" table that is emitted in DwarfFileTable::Emit(). 41c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_OPCODE_BASE 13 42c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 43c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Minimum line offset in a special line info. opcode. This value 44c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// was chosen to give a reasonable range of values. 45c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_BASE -5 46c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 47c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Range of line offsets in a special line info. opcode. 48c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_RANGE 14 49c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 50c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Define the architecture-dependent minimum instruction length (in bytes). 51c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This value should be rather too small than too big. 52c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_MIN_INSN_LENGTH 1 53c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 54c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: when DWARF2_LINE_MIN_INSN_LENGTH == 1 which is the current setting, 55c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// this routine is a nop and will be optimized away. 56a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendlingstatic inline uint64_t ScaleAddrDelta(uint64_t AddrDelta) { 57c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (DWARF2_LINE_MIN_INSN_LENGTH == 1) 58c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta; 59c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta % DWARF2_LINE_MIN_INSN_LENGTH != 0) { 60c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // TODO: report this error, but really only once. 61c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ; 62c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 63c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta / DWARF2_LINE_MIN_INSN_LENGTH; 64c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 65c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 66c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 67c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This is called when an instruction is assembled into the specified section 68c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// and if there is information from the last .loc directive that has yet to have 69c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// a line entry made for it is made. 70c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 71195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCLineEntry::Make(MCStreamer *MCOS, const MCSection *Section) { 72c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!MCOS->getContext().getDwarfLocSeen()) 73c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 74c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 75c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at in the current section for use in the line entry. 76c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LineSym = MCOS->getContext().CreateTempSymbol(); 77c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol to use for the MCLineEntry. 78c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineSym); 79c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 80c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the current .loc info saved in the context. 81c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCDwarfLoc &DwarfLoc = MCOS->getContext().getCurrentDwarfLoc(); 82c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 83c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a (local) line entry with the symbol and the current .loc info. 84c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCLineEntry LineEntry(LineSym, DwarfLoc); 85c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 86c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // clear DwarfLocSeen saying the current .loc info is now used. 873f55c24df9527de345f6cc960944840a7a101c6aKevin Enderby MCOS->getContext().ClearDwarfLocSeen(); 88c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 89c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the MCLineSection for this section, if one does not exist for this 90c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section create it. 9117fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 92c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 9317fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCLineSection *LineSection = MCLineSections.lookup(Section); 94c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!LineSection) { 95c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a new MCLineSection. This will be deleted after the dwarf line 96c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // table is created using it by iterating through the MCLineSections 97c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // DenseMap. 98c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection = new MCLineSection; 99c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Save a pointer to the new LineSection into the MCLineSections DenseMap. 10017fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().addMCLineSection(Section, LineSection); 101c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 102c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 103c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Add the line entry to this section's entries. 104c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection->addLineEntry(LineEntry); 105c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 106c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 107c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 108c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This helper routine returns an expression of End - Start + IntVal . 1092684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach// 1105fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindolastatic inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS, 1115fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &Start, 1125fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &End, 1135fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola int IntVal) { 114c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 115c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res = 1165fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&End, Variant, MCOS.getContext()); 117c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *RHS = 1185fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&Start, Variant, MCOS.getContext()); 119c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res1 = 1205fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext()); 121c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res2 = 1225fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCConstantExpr::Create(IntVal, MCOS.getContext()); 123c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res3 = 1245fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext()); 125c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return Res3; 126c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 127c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 128c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 129c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf line table for the specified section from the entries 130c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// in the LineSection. 131c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 132195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolastatic inline void EmitDwarfLineTable(MCStreamer *MCOS, 133c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCSection *Section, 13489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCLineSection *LineSection) { 135c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned FileNum = 1; 136c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned LastLine = 1; 137c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Column = 0; 138c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; 139c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Isa = 0; 140c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LastLabel = NULL; 141c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 142c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Loop through each MCLineEntry and encode the dwarf line number table. 14317fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (MCLineSection::const_iterator 144c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby it = LineSection->getMCLineEntries()->begin(), 145c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ie = LineSection->getMCLineEntries()->end(); it != ie; ++it) { 146c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 147c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (FileNum != it->getFileNum()) { 148c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby FileNum = it->getFileNum(); 149c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_file, 1); 1503ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(FileNum); 151c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 152c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Column != it->getColumn()) { 153c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Column = it->getColumn(); 154c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_column, 1); 1553ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Column); 156c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 157c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Isa != it->getIsa()) { 158c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Isa = it->getIsa(); 159c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_isa, 1); 1603ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Isa); 161c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 162c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if ((it->getFlags() ^ Flags) & DWARF2_FLAG_IS_STMT) { 163c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Flags = it->getFlags(); 164c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_negate_stmt, 1); 165c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 166c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_BASIC_BLOCK) 167c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_basic_block, 1); 168c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_PROLOGUE_END) 169c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_prologue_end, 1); 170c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_EPILOGUE_BEGIN) 171c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_epilogue_begin, 1); 172c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 17364185cc6090f695c4f97c51cf2adc731f56d1a20Rafael Espindola int64_t LineDelta = static_cast<int64_t>(it->getLine()) - LastLine; 174c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *Label = it->getLabel(); 175c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 176c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // At this point we want to emit/create the sequence to encode the delta in 177c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // line numbers and the increment of the address from the previous Label 178c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and the current Label. 1791be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo(); 180672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label, 181672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng asmInfo.getPointerSize()); 182c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 183c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LastLine = it->getLine(); 184c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LastLabel = Label; 185c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 186c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 187c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Emit a DW_LNE_end_sequence for the end of the section. 188c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Using the pointer Section create a temporary label at the end of the 189c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section and use that and the LastLabel to compute the address delta 190c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and use INT64_MAX as the line delta which is the signal that this is 191c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // actually a DW_LNE_end_sequence. 192c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 193c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section to be able to create a symbol at its end. 194c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->SwitchSection(Section); 19589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 19689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 197c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at the end of the section. 19889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *SectionEnd = context.CreateTempSymbol(); 199c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol, as we are at the end of the section. 200c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(SectionEnd); 201c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 202c8e41c591741b3da1077f7000274ad040bef8002Sylvestre Ledru // Switch back the dwarf line section. 203e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection()); 204195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindola 2051be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo(); 206672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd, 207672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng asmInfo.getPointerSize()); 208c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 209c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 210c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 211c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf file and the line tables. 212c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 213489d67927172941bf59b9f4829ab8910814fea24Rafael Espindolaconst MCSymbol *MCDwarfFileTable::Emit(MCStreamer *MCOS) { 21489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 215c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section where the table will be emitted into. 216e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection()); 217c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 218c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at the beginning of this section. 21989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineStartSym = context.CreateTempSymbol(); 220c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol, as we are at the start of the section. 221c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineStartSym); 222c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 223c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the section (to be set when we get there). 22489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineEndSym = context.CreateTempSymbol(); 225c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 226c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // The first 4 bytes is the total length of the information for this 227c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // compilation unit (not including these 4 bytes for the length). 2285fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *LineEndSym,4), 2290bbe0b440ee2cef47dcb7b281825eb70341c16ddRafael Espindola 4); 230c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 231c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Next 2 bytes is the Version, which is Dwarf 2. 232c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(2, 2); 233c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 234c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the prologue (to be set when we get there). 23589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *ProEndSym = context.CreateTempSymbol(); // Lprologue_end 236c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 237c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Length of the prologue, is the next 4 bytes. Which is the start of the 238c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section to the end of the prologue. Not including the 4 bytes for the 239c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // total length, the 2 bytes for the version, and these 4 bytes for the 240c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // length of the prologue. 2415fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *ProEndSym, 242c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby (4 + 2 + 4)), 2435d4918dbd116b0b5e561c431b1ea527ee1b9302aRafael Espindola 4, 0); 244c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 245c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Parameters of the state machine, are next. 246c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_MIN_INSN_LENGTH, 1); 247c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_DEFAULT_IS_STMT, 1); 248c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_BASE, 1); 249c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_RANGE, 1); 250c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_OPCODE_BASE, 1); 251c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 252c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Standard opcode lengths 253c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_copy 254c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_pc 255c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_line 256c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_file 257c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_column 258c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_negate_stmt 259c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_basic_block 260c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_const_add_pc 261c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_fixed_advance_pc 262c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_prologue_end 263c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_epilogue_begin 264c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // DW_LNS_set_isa 265c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 266c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the directory and file tables. 267c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 268c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // First the directory table. 269c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<StringRef> &MCDwarfDirs = 27089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola context.getMCDwarfDirs(); 271c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 0; i < MCDwarfDirs.size(); i++) { 27268ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(MCDwarfDirs[i]); // the DirectoryName 27368ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(StringRef("\0", 1)); // the null term. of the string 274c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 275c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the directory list 276c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 277c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Second the file table. 278c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<MCDwarfFile *> &MCDwarfFiles = 279c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCDwarfFiles(); 280c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 1; i < MCDwarfFiles.size(); i++) { 28168ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(MCDwarfFiles[i]->getName()); // FileName 28268ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(StringRef("\0", 1)); // the null term. of the string 2833ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola // the Directory num 2843ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(MCDwarfFiles[i]->getDirIndex()); 285c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // last modification timestamp (always 0) 286c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // filesize (always 0) 287c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 288c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the file list 289c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 290c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the prologue, so set the value of the symbol at the 291c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end of the prologue (that was used in a previous expression). 292c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(ProEndSym); 293c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 294c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the line tables. 29517fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 296c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 29717fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const std::vector<const MCSection *> &MCLineSectionOrder = 29817fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().getMCLineSectionOrder(); 29917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (std::vector<const MCSection*>::const_iterator it = 300c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling MCLineSectionOrder.begin(), ie = MCLineSectionOrder.end(); it != ie; 30117fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola ++it) { 30217fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCSection *Sec = *it; 30317fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCLineSection *Line = MCLineSections.lookup(Sec); 30489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola EmitDwarfLineTable(MCOS, Sec, Line); 305c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 306c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Now delete the MCLineSections that were created in MCLineEntry::Make() 307c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and used to emit the line table. 30817fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola delete Line; 309c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 310c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 311767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola if (MCOS->getContext().getAsmInfo().getLinkerRequiresNonEmptyDwarfLines() 312767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola && MCLineSectionOrder.begin() == MCLineSectionOrder.end()) { 313a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The darwin9 linker has a bug (see PR8715). For for 32-bit architectures 3142684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach // it requires: 315a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // total_length >= prologue_length + 10 316a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // We are 4 bytes short, since we have total_length = 51 and 317a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // prologue_length = 45 318a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola 319a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The regular end_sequence should be sufficient. 320a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola MCDwarfLineAddr::Emit(MCOS, INT64_MAX, 0); 3215113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel } 3225113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel 323c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the section, so set the value of the symbol at the end 324c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // of this section (that was used in a previous expression). 325c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineEndSym); 326489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola 327489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola return LineStartSym; 328c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 329c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 330c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to write the encoding to an object writer. 331c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Write(MCObjectWriter *OW, int64_t LineDelta, 332c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 333c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 334c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 335c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 336c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OW->WriteBytes(OS.str()); 337c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 338c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 339c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to emit the encoding to a streamer. 340195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCDwarfLineAddr::Emit(MCStreamer *MCOS, int64_t LineDelta, 341c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 342c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 343c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 344c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 34568ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(OS.str()); 346c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 347c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 348c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas. 349c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Encode(int64_t LineDelta, uint64_t AddrDelta, 350c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_ostream &OS) { 351c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t Temp, Opcode; 352c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby bool NeedCopy = false; 353c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 354c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Scale the address delta by the minimum instruction length. 355c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby AddrDelta = ScaleAddrDelta(AddrDelta); 356c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 357c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // A LineDelta of INT64_MAX is a signal that this is actually a 3582684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the 359c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end_sequence to emit the matrix entry. 360c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == INT64_MAX) { 361c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta == MAX_SPECIAL_ADDR_DELTA) 362c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 363c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else { 364c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 3652d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach encodeULEB128(AddrDelta, OS); 366c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 367c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_extended_op); 368c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(1); 369c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNE_end_sequence); 370c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 371c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 372c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 373c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the line delta by the base. 374c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = LineDelta - DWARF2_LINE_BASE; 375c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 376c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // If the line increment is out of range of a special opcode, we must encode 377c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // it with DW_LNS_advance_line. 378c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Temp >= DWARF2_LINE_RANGE) { 379c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_line); 3802d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach encodeSLEB128(LineDelta, OS); 381c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 382c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineDelta = 0; 383c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = 0 - DWARF2_LINE_BASE; 384c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby NeedCopy = true; 385c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 386c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 387c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Use DW_LNS_copy instead of a "line +0, addr +0" special opcode. 388c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == 0 && AddrDelta == 0) { 389c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 390c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 391c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 392c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 393c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the opcode by the special opcode base. 394c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp += DWARF2_LINE_OPCODE_BASE; 395c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 396c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Avoid overflow when addr_delta is large. 397c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta < 256 + MAX_SPECIAL_ADDR_DELTA) { 398c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using a special opcode. 399c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + AddrDelta * DWARF2_LINE_RANGE; 400c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 401c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 402c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 403c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 404c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 405c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using DW_LNS_const_add_pc followed by special op. 406c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + (AddrDelta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; 407c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 408c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 409c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 410c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 411c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 412c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 413c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 414c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Otherwise use DW_LNS_advance_pc. 415c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 4162d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach encodeULEB128(AddrDelta, OS); 417c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 418c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (NeedCopy) 419c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 420c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else 421c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Temp); 422c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 423c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 4247cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::print(raw_ostream &OS) const { 4257cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby OS << '"' << getName() << '"'; 4267cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 4277cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 428286c4dc355b8be6806081b23c3097485821c7642Manman Ren#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) 4297cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::dump() const { 4307cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby print(dbgs()); 4317cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 432cc77eece74c8db09acc2af425e7e6c88a5bb30d1Manman Ren#endif 433c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 43494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// Utility function to write a tuple for .debug_abbrev. 43594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderbystatic void EmitAbbrev(MCStreamer *MCOS, uint64_t Name, uint64_t Form) { 43694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(Name); 43794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(Form); 43894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 43994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 44094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits 44194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// the data for .debug_abbrev section which contains three DIEs. 44294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderbystatic void EmitGenDwarfAbbrev(MCStreamer *MCOS) { 44394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 44494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection()); 44594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 44694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_TAG_compile_unit DIE abbrev (1). 44794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(1); 44894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_compile_unit); 44994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1); 45094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4); 45194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr); 45294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr); 45394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string); 45494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string); 45594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef DwarfDebugFlags = context.getDwarfDebugFlags(); 45694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (!DwarfDebugFlags.empty()) 45794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string); 45894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_producer, dwarf::DW_FORM_string); 45994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_language, dwarf::DW_FORM_data2); 46094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 46194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 46238fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // DW_TAG_label DIE abbrev (2). 46394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(2); 46438fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_label); 46594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1); 46694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string); 46794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data4); 46894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data4); 46994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr); 47094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag); 47194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 47294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 47394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_TAG_unspecified_parameters DIE abbrev (3). 47494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(3); 47594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_unspecified_parameters); 47694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_no, 1); 47794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 47894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 47994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Terminate the abbreviations for this compilation unit. 48094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 48194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 48294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 48394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the data for 48494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// .debug_aranges section. Which contains a header and a table of pairs of 48594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// PointerSize'ed values for the address and size of section(s) with line table 48694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// entries (just the default .text in our case) and a terminating pair of zeros. 48715ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonovstatic void EmitGenDwarfAranges(MCStreamer *MCOS, 48815ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov const MCSymbol *InfoSectionSymbol) { 48994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 49094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 49194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create a symbol at the end of the section that we are creating the dwarf 49294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // debugging info to use later in here as part of the expression to calculate 49394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // the size of the section for the table. 49494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getGenDwarfSection()); 49594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *SectionEndSym = context.CreateTempSymbol(); 49694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(SectionEndSym); 49794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.setGenDwarfSectionEndSym(SectionEndSym); 49894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 49994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection()); 50094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 50194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // This will be the length of the .debug_aranges section, first account for 50294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // the size of each item in the header (see below where we emit these items). 50394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int Length = 4 + 2 + 4 + 1 + 1; 50494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 50594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Figure the padding after the header before the table of address and size 50694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // pairs who's values are PointerSize'ed. 50794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCAsmInfo &asmInfo = context.getAsmInfo(); 50894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int AddrSize = asmInfo.getPointerSize(); 50994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int Pad = 2 * AddrSize - (Length & (2 * AddrSize - 1)); 51094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Pad == 2 * AddrSize) 51194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Pad = 0; 51294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += Pad; 51394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 51494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the size of the pair of PointerSize'ed values for the address and size 51594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // of the one default .text section we have in the table. 51694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += 2 * AddrSize; 51794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // And the pair of terminating zeros. 51894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += 2 * AddrSize; 51994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 52094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 52194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Emit the header for this section. 52294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte length not including the 4 byte value for the length. 52394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(Length - 4, 4); 52494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 2 byte version, which is 2. 52594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(2, 2); 52694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte offset to the compile unit in the .debug_info from the start 52715ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov // of the .debug_info. 52815ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov if (InfoSectionSymbol) 52915ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov MCOS->EmitSymbolValue(InfoSectionSymbol, 4); 53015ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov else 53115ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov MCOS->EmitIntValue(0, 4); 53294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of an address. 53394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(AddrSize, 1); 53494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of a segment descriptor, we use a value of zero. 53594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 53694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Align the header with the padding if needed, before we put out the table. 53794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby for(int i = 0; i < Pad; i++) 53894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 53994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 54094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Now emit the table of pairs of PointerSize'ed values for the section(s) 54194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // address and size, in our case just the one default .text section. 54294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Addr = MCSymbolRefExpr::Create( 54394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getGenDwarfSectionStartSym(), MCSymbolRefExpr::VK_None, context); 54494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Size = MakeStartMinusEndExpr(*MCOS, 54594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby *context.getGenDwarfSectionStartSym(), *SectionEndSym, 0); 54694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Addr, AddrSize); 54794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Size, AddrSize); 54894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 54994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // And finally the pair of terminating zeros. 55094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, AddrSize); 55194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, AddrSize); 55294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 55394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 55494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the data for 55594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// .debug_info section which contains three parts. The header, the compile_unit 55638fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby// DIE and a list of label DIEs. 557489d67927172941bf59b9f4829ab8910814fea24Rafael Espindolastatic void EmitGenDwarfInfo(MCStreamer *MCOS, 558489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola const MCSymbol *AbbrevSectionSymbol, 559489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola const MCSymbol *LineSectionSymbol) { 56094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 56194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 5622684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection()); 56394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 56494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create a symbol at the start and end of this section used in here for the 56594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // expression to calculate the length in the header. 56694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *InfoStart = context.CreateTempSymbol(); 56794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(InfoStart); 56894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *InfoEnd = context.CreateTempSymbol(); 56994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // First part: the header. 57194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte total length of the information for this compilation unit, not 57394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // including these 4 bytes. 57494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Length = MakeStartMinusEndExpr(*MCOS, *InfoStart, *InfoEnd, 4); 57594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Length, 4); 57694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 2 byte DWARF version, which is 2. 57894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(2, 2); 57994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 58094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte offset to the debug abbrevs from the start of the .debug_abbrev, 58194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // it is at the start of that section so this is zero. 582489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola if (AbbrevSectionSymbol) { 583489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitSymbolValue(AbbrevSectionSymbol, 4); 584489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } else { 585489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitIntValue(0, 4); 586489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } 58794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 58894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCAsmInfo &asmInfo = context.getAsmInfo(); 58994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int AddrSize = asmInfo.getPointerSize(); 59094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of an address. 59194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(AddrSize, 1); 59294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 59394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Second part: the compile_unit DIE. 59494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 59594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The DW_TAG_compile_unit DIE abbrev (1). 59694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(1); 59794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 59894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_AT_stmt_list, a 4 byte offset from the start of the .debug_line section, 59994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // which is at the start of that section so this is zero. 600489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola if (LineSectionSymbol) { 601489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitSymbolValue(LineSectionSymbol, 4); 602489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } else { 603489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitIntValue(0, 4); 604489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } 60594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 60694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_low_pc, the first address of the default .text section. 60794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Start = MCSymbolRefExpr::Create( 60894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getGenDwarfSectionStartSym(), MCSymbolRefExpr::VK_None, context); 60994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Start, AddrSize); 61094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 61194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_high_pc, the last address of the default .text section. 61294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *End = MCSymbolRefExpr::Create( 61394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getGenDwarfSectionEndSym(), MCSymbolRefExpr::VK_None, context); 61494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(End, AddrSize); 61594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 61694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_name, the name of the source file. Reconstruct from the first directory 61794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // and file table entries. 61894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const std::vector<StringRef> &MCDwarfDirs = 61994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getMCDwarfDirs(); 62094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (MCDwarfDirs.size() > 0) { 62168ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(MCDwarfDirs[0]); 62268ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes("/"); 62394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 62494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const std::vector<MCDwarfFile *> &MCDwarfFiles = 62594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->getContext().getMCDwarfFiles(); 62668ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(MCDwarfFiles[1]->getName()); 62794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 62894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 62994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_comp_dir, the working directory the assembly was done in. 63068ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(context.getCompilationDir()); 63194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 63294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 63394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_APPLE_flags, the command line arguments of the assembler tool. 63494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef DwarfDebugFlags = context.getDwarfDebugFlags(); 63594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (!DwarfDebugFlags.empty()){ 63668ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(DwarfDebugFlags); 63794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 63894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 63994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 64094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_producer, the version of the assembler tool. 64175c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby StringRef DwarfDebugProducer = context.getDwarfDebugProducer(); 64275c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby if (!DwarfDebugProducer.empty()){ 64375c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby MCOS->EmitBytes(DwarfDebugProducer); 64475c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby } 64575c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby else { 64675c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby MCOS->EmitBytes(StringRef("llvm-mc (based on LLVM ")); 64775c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby MCOS->EmitBytes(StringRef(PACKAGE_VERSION)); 64875c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby MCOS->EmitBytes(StringRef(")")); 64975c9b9384f50e9387f24dd7ce6af403cbda6d19aKevin Enderby } 65094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 65194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 65294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_language, a 4 byte value. We use DW_LANG_Mips_Assembler as the dwarf2 65394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // draft has no standard code for assembler. 65494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LANG_Mips_Assembler, 2); 65594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 65638fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // Third part: the list of label DIEs. 65794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 65811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Loop on saved info for dwarf labels and create the DIEs for them. 65911c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby const std::vector<const MCGenDwarfLabelEntry *> &Entries = 66011c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby MCOS->getContext().getMCGenDwarfLabelEntries(); 66111c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby for (std::vector<const MCGenDwarfLabelEntry *>::const_iterator it = 66294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Entries.begin(), ie = Entries.end(); it != ie; 66394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby ++it) { 66411c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby const MCGenDwarfLabelEntry *Entry = *it; 66594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 66638fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // The DW_TAG_label DIE abbrev (2). 66794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(2); 66894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 66994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_name, of the label without any leading underbar. 67068ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher MCOS->EmitBytes(Entry->getName()); 67194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 67294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_decl_file, index into the file table. 67494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(Entry->getFileNumber(), 4); 67594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_decl_line, source line number. 67794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(Entry->getLineNumber(), 4); 67894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_low_pc, start address of the label. 68094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *AT_low_pc = MCSymbolRefExpr::Create(Entry->getLabel(), 68194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbolRefExpr::VK_None, context); 68294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(AT_low_pc, AddrSize); 68394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 68494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_AT_prototyped, a one byte flag value of 0 saying we have no prototype. 68594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 68694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 68794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The DW_TAG_unspecified_parameters DIE abbrev (3). 68894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(3); 68994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 69094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the NULL DIE terminating the DW_TAG_unspecified_parameters DIE's. 69194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 69294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 69311c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Deallocate the MCGenDwarfLabelEntry classes that saved away the info 69411c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // for the dwarf labels. 69511c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby for (std::vector<const MCGenDwarfLabelEntry *>::const_iterator it = 69694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Entries.begin(), ie = Entries.end(); it != ie; 69794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby ++it) { 69811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby const MCGenDwarfLabelEntry *Entry = *it; 69994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby delete Entry; 70094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 70194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 70294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the NULL DIE terminating the Compile Unit DIE's. 70394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 70494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 70594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Now set the value of the symbol at the end of the info section. 70694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(InfoEnd); 70794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 70894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 70994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 71094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the Dwarf 71194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// sections. 71294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 713489d67927172941bf59b9f4829ab8910814fea24Rafael Espindolavoid MCGenDwarfInfo::Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol) { 71494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create the dwarf sections in this order (.debug_line already created). 71594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 716489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola const MCAsmInfo &AsmInfo = context.getAsmInfo(); 71715ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov bool CreateDwarfSectionSymbols = 71815ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov AsmInfo.doesDwarfUseRelocationsAcrossSections(); 71915ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov if (!CreateDwarfSectionSymbols) 72015ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov LineSectionSymbol = NULL; 72115ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov MCSymbol *AbbrevSectionSymbol = NULL; 72215ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov MCSymbol *InfoSectionSymbol = NULL; 72394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection()); 72415ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov if (CreateDwarfSectionSymbols) { 72515ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov InfoSectionSymbol = context.CreateTempSymbol(); 72615ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov MCOS->EmitLabel(InfoSectionSymbol); 72715ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov } 72894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection()); 72915ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov if (CreateDwarfSectionSymbols) { 730489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola AbbrevSectionSymbol = context.CreateTempSymbol(); 731489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitLabel(AbbrevSectionSymbol); 732489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } 73394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection()); 73494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 73594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // If there are no line table entries then do not emit any section contents. 73694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (context.getMCLineSections().empty()) 73794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 73894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 73994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_aranges section. 74015ab115df57949fa55d92ffdfba491f7d02ed60fAlexey Samsonov EmitGenDwarfAranges(MCOS, InfoSectionSymbol); 74194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 74294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_abbrev section. 74394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitGenDwarfAbbrev(MCOS); 74494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 74594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_info section. 746489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola EmitGenDwarfInfo(MCOS, AbbrevSectionSymbol, LineSectionSymbol); 74794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 74894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 74994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 75094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this is called when symbol 75194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// for a label is created. If this symbol is not a temporary and is in the 75294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// section that dwarf is being generated for, save the needed info to create 75311c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby// a dwarf label. 75494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 75511c2defa9157bd589cb322218c718c4492ed5746Kevin Enderbyvoid MCGenDwarfLabelEntry::Make(MCSymbol *Symbol, MCStreamer *MCOS, 75694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby SourceMgr &SrcMgr, SMLoc &Loc) { 7573c3cdcc270515de95a4982db3073b9fdf44a5c2eEric Christopher // We won't create dwarf labels for temporary symbols or symbols not in 75894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // the default text. 75994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Symbol->isTemporary()) 76094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 76194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 76294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (context.getGenDwarfSection() != MCOS->getCurrentSection()) 76394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 76494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 76511c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // The dwarf label's name does not have the symbol name's leading 76694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // underbar if any. 76794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef Name = Symbol->getName(); 76894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Name.startswith("_")) 76994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Name = Name.substr(1, Name.size()-1); 77094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 77111c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Get the dwarf file number to be used for the dwarf label. 77294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby unsigned FileNumber = context.getGenDwarfFileNumber(); 77394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 77494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Finding the line number is the expensive part which is why we just don't 77511c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // pass it in as for some symbols we won't create a dwarf label. 77694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int CurBuffer = SrcMgr.FindBufferContainingLoc(Loc); 77794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby unsigned LineNumber = SrcMgr.FindLineNumber(Loc, CurBuffer); 77894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 77994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // We create a temporary symbol for use for the AT_high_pc and AT_low_pc 78094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // values so that they don't have things like an ARM thumb bit from the 78194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // original symbol. So when used they won't get a low bit set after 78294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // relocation. 78394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *Label = context.CreateTempSymbol(); 78494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(Label); 78594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 78694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create and entry for the info and add it to the other entries. 7872684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach MCGenDwarfLabelEntry *Entry = 78811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby new MCGenDwarfLabelEntry(Name, FileNumber, LineNumber, Label); 78911c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby MCOS->getContext().addMCGenDwarfLabelEntry(Entry); 79094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 79194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 79289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic int getDataAlignmentFactor(MCStreamer &streamer) { 79389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 7941be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCAsmInfo &asmInfo = context.getAsmInfo(); 79589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int size = asmInfo.getPointerSize(); 7961be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng if (asmInfo.isStackGrowthDirectionUp()) 79789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return size; 7981be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng else 7991be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng return -size; 80089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 80189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 802abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic unsigned getSizeForEncoding(MCStreamer &streamer, 803abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned symbolEncoding) { 80425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCContext &context = streamer.getContext(); 80525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned format = symbolEncoding & 0x0f; 80625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola switch (format) { 807858143816d43e58b17bfd11cb1b57afbd7f0f893Craig Topper default: llvm_unreachable("Unknown Encoding"); 80825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_absptr: 80925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_signed: 8101be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng return context.getAsmInfo().getPointerSize(); 81125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata2: 81225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata2: 813abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 2; 81425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata4: 81525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata4: 816abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 4; 81725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata8: 81825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata8: 819abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 8; 82025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola } 821abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola} 822abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola 823abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol, 8242541c41f3e2af94585e14353a91f02facd65e415Bill Wendling unsigned symbolEncoding, const char *comment = 0) { 825a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola MCContext &context = streamer.getContext(); 826a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 827a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCExpr *v = asmInfo.getExprForFDESymbol(&symbol, 828debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 829a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola streamer); 830abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 8312541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (streamer.isVerboseAsm() && comment) streamer.AddComment(comment); 832debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitAbsValue(v, size); 83325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 83425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 835bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindolastatic void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol, 836bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned symbolEncoding) { 837bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola MCContext &context = streamer.getContext(); 838bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 839debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola const MCExpr *v = asmInfo.getExprForPersonalitySymbol(&symbol, 840debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 841debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer); 842bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 843debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitValue(v, size); 844bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola} 845bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola 84625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolastatic const MachineLocation TranslateMachineLocation( 8470e6a052331f674dd70e28af41f654a7874405eabEvan Cheng const MCRegisterInfo &MRI, 84825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &Loc) { 84925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ? 85025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation::VirtualFP : 8510e6a052331f674dd70e28af41f654a7874405eabEvan Cheng unsigned(MRI.getDwarfRegNum(Loc.getReg(), true)); 85225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &NewLoc = Loc.isReg() ? 85325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset()); 85425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola return NewLoc; 85525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 85625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 85725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolanamespace { 85825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola class FrameEmitterImpl { 85925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola int CFAOffset; 860514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola int CIENum; 8615426a9ee37667660935d80841c5392d78e254318Rafael Espindola bool UsingCFI; 86240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola bool IsEH; 863e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCSymbol *SectionStart; 86425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola public: 8651424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling FrameEmitterImpl(bool usingCFI, bool isEH) 8661424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling : CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH), 8671424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling SectionStart(0) {} 8681424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 8691424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling void setSectionStart(const MCSymbol *Label) { SectionStart = Label; } 87025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 871e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// EmitCompactUnwind - Emit the unwind information in a compact way. If 872e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// we're successful, return 'true'. Otherwise, return 'false' and it will 873e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// emit the normal CIE and FDE. 874e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling bool EmitCompactUnwind(MCStreamer &streamer, 875e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCDwarfFrameInfo &frame); 876e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 87725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &EmitCIE(MCStreamer &streamer, 87825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 87925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 88025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 88116d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola bool IsSignalFrame, 88225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding); 88325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *EmitFDE(MCStreamer &streamer, 88425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 8859f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame); 88625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstructions(MCStreamer &streamer, 88725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 88825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel); 88925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstruction(MCStreamer &Streamer, 89025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr); 89125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola }; 8923c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 8933c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling} // end anonymous namespace 8943c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 8953c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendlingstatic void EmitEncodingByte(MCStreamer &Streamer, unsigned Encoding, 8963c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling StringRef Prefix) { 8973c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (Streamer.isVerboseAsm()) { 898eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer const char *EncStr; 8993c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling switch (Encoding) { 900eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer default: EncStr = "<unknown encoding>"; break; 901eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_absptr: EncStr = "absptr"; break; 902eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_omit: EncStr = "omit"; break; 903eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel: EncStr = "pcrel"; break; 904eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_udata4: EncStr = "udata4"; break; 905eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_udata8: EncStr = "udata8"; break; 906eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_sdata4: EncStr = "sdata4"; break; 907eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_sdata8: EncStr = "sdata8"; break; 908eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata4: 909eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "pcrel udata4"; 910eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 911eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4: 912eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "pcrel sdata4"; 913eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 914eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8: 915eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "pcrel udata8"; 916eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 917eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8: 918eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "screl sdata8"; 919eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9203c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4: 9213c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel udata4"; 922eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9233c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4: 9243c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel sdata4"; 925eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9263c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8: 9273c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel udata8"; 928eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9293c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8: 9303c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel sdata8"; 931eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9323c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling } 9333c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 9343c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.AddComment(Twine(Prefix) + " = " + EncStr); 9353c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling } 9363c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 9373c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.EmitIntValue(Encoding, 1); 93825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 93925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 94025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, 94125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr) { 942fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola int dataAlignmentFactor = getDataAlignmentFactor(Streamer); 943efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling bool VerboseAsm = Streamer.isVerboseAsm(); 94489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 945fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola switch (Instr.getOperation()) { 946f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola case MCCFIInstruction::OpRegister: { 947f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola unsigned Reg1 = Instr.getRegister(); 948f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola unsigned Reg2 = Instr.getRegister2(); 949f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola if (VerboseAsm) { 950f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.AddComment("DW_CFA_register"); 951f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.AddComment(Twine("Reg1 ") + Twine(Reg1)); 952f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.AddComment(Twine("Reg2 ") + Twine(Reg2)); 953f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola } 954f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_register, 1); 955f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.EmitULEB128IntValue(Reg1); 956f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola Streamer.EmitULEB128IntValue(Reg2); 957f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola return; 958f4f14f68f6078ea6681ee27b5bf42719d7db3441Rafael Espindola } 9597f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpUndefined: { 960ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 961c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola if (VerboseAsm) { 962c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola Streamer.AddComment("DW_CFA_undefined"); 963c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 964c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola } 965c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_undefined, 1); 966c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 967c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola return; 968c8fec7e21f5c24303eab8a8592f3b8faff347d86Rafael Espindola } 9697f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpAdjustCfaOffset: 9707f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpDefCfaOffset: { 9717f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola const bool IsRelative = 9727f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Instr.getOperation() == MCCFIInstruction::OpAdjustCfaOffset; 97389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 9747f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (VerboseAsm) 9757f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.AddComment("DW_CFA_def_cfa_offset"); 9767f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); 9775d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola 9787f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (IsRelative) 979ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola CFAOffset += Instr.getOffset(); 9807f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola else 981ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola CFAOffset = -Instr.getOffset(); 98289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 9837f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (VerboseAsm) 9847f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.AddComment(Twine("Offset " + Twine(CFAOffset))); 9857f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitULEB128IntValue(CFAOffset); 9867f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 9877f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola return; 9887f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola } 9897f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpDefCfa: { 9907f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (VerboseAsm) 9917f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.AddComment("DW_CFA_def_cfa"); 9927f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); 9937f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 9947f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (VerboseAsm) 995ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola Streamer.AddComment(Twine("Reg ") + Twine(Instr.getRegister())); 996ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola Streamer.EmitULEB128IntValue(Instr.getRegister()); 9977f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 998ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola CFAOffset = -Instr.getOffset(); 9997f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10007f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (VerboseAsm) 10017f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.AddComment(Twine("Offset " + Twine(CFAOffset))); 10027f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitULEB128IntValue(CFAOffset); 10037f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10047f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola return; 10057f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola } 10067f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10077f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpDefCfaRegister: { 10087f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (VerboseAsm) 10097f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.AddComment("DW_CFA_def_cfa_register"); 10107f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); 10117f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10127f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola if (VerboseAsm) 1013ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola Streamer.AddComment(Twine("Reg ") + Twine(Instr.getRegister())); 1014ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola Streamer.EmitULEB128IntValue(Instr.getRegister()); 10157f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10167f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola return; 10177f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola } 10187f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola 10197f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpOffset: 10207f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRelOffset: { 10217f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola const bool IsRelative = 10227f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola Instr.getOperation() == MCCFIInstruction::OpRelOffset; 102389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1024ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 1025ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola int Offset = Instr.getOffset(); 102625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola if (IsRelative) 102725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset -= CFAOffset; 102825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset = Offset / dataAlignmentFactor; 102989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 103089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Offset < 0) { 1031efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended_sf"); 1032fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1); 1033efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 1034fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitULEB128IntValue(Reg); 1035efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 1036fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitSLEB128IntValue(Offset); 103789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else if (Reg < 64) { 1038e08d4335ad29d74008222b4d7ac91c153ed66becBill Wendling if (VerboseAsm) Streamer.AddComment(Twine("DW_CFA_offset + Reg(") + 1039e08d4335ad29d74008222b4d7ac91c153ed66becBill Wendling Twine(Reg) + ")"); 1040fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1); 1041efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 1042eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 104389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 1044efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended"); 1045fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1); 1046efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 1047eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 1048efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 1049eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 1050fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 1051fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 1052fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 10537f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRememberState: 1054efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_remember_state"); 1055fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1); 1056fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 10577f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRestoreState: 1058efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_restore_state"); 1059fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1); 1060fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 10617f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpSameValue: { 1062ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 1063efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_same_value"); 1064c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1); 1065efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 1066e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 1067c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola return; 1068c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola } 10697f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpRestore: { 1070ff233c9e5c3e439fd1eed84b9a9e88a5370572dbRafael Espindola unsigned Reg = Instr.getRegister(); 1071ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola if (VerboseAsm) { 1072ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola Streamer.AddComment("DW_CFA_restore"); 1073ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 1074ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola } 1075ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore | Reg, 1); 1076ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola return; 1077ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola } 10787f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola case MCCFIInstruction::OpEscape: 10796f0b181bc70318f8d5d4b9bdead7fc748677fe2aRafael Espindola if (VerboseAsm) Streamer.AddComment("Escape bytes"); 108068ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher Streamer.EmitBytes(Instr.getValues()); 10816f0b181bc70318f8d5d4b9bdead7fc748677fe2aRafael Espindola return; 1082fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 1083fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola llvm_unreachable("Unhandled case in switch"); 1084fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola} 1085fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1086fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// EmitFrameMoves - Emit frame instructions to describe the layout of the 1087fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// frame. 108825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstructions(MCStreamer &streamer, 108925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 109025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel) { 1091fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (unsigned i = 0, N = Instrs.size(); i < N; ++i) { 1092fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MCCFIInstruction &Instr = Instrs[i]; 1093fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *Label = Instr.getLabel(); 1094fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Throw out move if the label is invalid. 1095fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. 1096fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1097fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Advance row if new location. 1098fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (BaseLabel && Label) { 1099fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *ThisSym = Label; 1100fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (ThisSym != BaseLabel) { 1101d221cd676b44d8118b1db152ecc2168538479626Bill Wendling if (streamer.isVerboseAsm()) streamer.AddComment("DW_CFA_advance_loc4"); 1102fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym); 1103fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola BaseLabel = ThisSym; 1104fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 110589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 1106fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1107b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstruction(streamer, Instr); 110889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 110989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 111089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1111e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// EmitCompactUnwind - Emit the unwind information in a compact way. If we're 1112e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// successful, return 'true'. Otherwise, return 'false' and it will emit the 1113e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// normal CIE and FDE. 1114e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendlingbool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer, 1115e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCDwarfFrameInfo &Frame) { 1116e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling MCContext &Context = Streamer.getContext(); 1117e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = Context.getObjectFileInfo(); 11183c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling bool VerboseAsm = Streamer.isVerboseAsm(); 1119e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1120e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // range-start range-length compact-unwind-enc personality-func lsda 1121e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _foo LfooEnd-_foo 0x00000023 0 0 1122e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _bar LbarEnd-_bar 0x00000025 __gxx_personality except_tab1 1123e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1124e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .section __LD,__compact_unwind,regular,debug 1125e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1126e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _foo 1127e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _foo 1128e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L1,LfooEnd-_foo 1129e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L1 1130e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01010001 1131e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 1132e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 1133e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1134e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _bar 1135e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _bar 1136e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L2,LbarEnd-_bar 1137e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L2 1138e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01020011 1139e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad __gxx_personality 1140e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad except_tab1 1141e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1142e52e3f2c020354c8e0e966b719152b08349d0334Bill Wendling uint32_t Encoding = Frame.CompactUnwindEncoding; 11436a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling if (!Encoding) return false; 11446a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling 11454bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling // The encoding needs to know we have an LSDA. 11464bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling if (Frame.Lsda) 11474bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Encoding |= 0x40000000; 11484bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling 1149e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng Streamer.SwitchSection(MOFI->getCompactUnwindSection()); 11503c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 1151e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Start 1152203576aa0cb9d8bf2d2e4d910ebab4b7a63262aeEvan Cheng unsigned FDEEncoding = MOFI->getFDEEncoding(UsingCFI); 11539056e9032001a2d47057cecec5e39895cbc31799Bill Wendling unsigned Size = getSizeForEncoding(Streamer, FDEEncoding); 11543c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Range Start"); 11559056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Function, Size); 1156e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1157e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Length 1158e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCExpr *Range = MakeStartMinusEndExpr(Streamer, *Frame.Begin, 1159e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling *Frame.End, 0); 11603c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Range Length"); 11619287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Streamer.EmitAbsValue(Range, 4); 11629287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 11639287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling // Compact Encoding 11649287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_udata4); 116570be28a5adba5bcae0c6dcd63f17592864c351fcBenjamin Kramer if (VerboseAsm) Streamer.AddComment("Compact Unwind Encoding: 0x" + 116670be28a5adba5bcae0c6dcd63f17592864c351fcBenjamin Kramer Twine::utohexstr(Encoding)); 11679287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Streamer.EmitIntValue(Encoding, Size); 11689287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 1169e52e3f2c020354c8e0e966b719152b08349d0334Bill Wendling 11709056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // Personality Function 11714bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr); 11723c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Personality Function"); 11734498d39680abe3970dc84dca973aff46d0f9039bBill Wendling if (Frame.Personality) 11749056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Personality, Size); 11754498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 11764498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No personality fn 11779056e9032001a2d47057cecec5e39895cbc31799Bill Wendling 11789056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // LSDA 11794498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Size = getSizeForEncoding(Streamer, Frame.LsdaEncoding); 11803c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("LSDA"); 11814498d39680abe3970dc84dca973aff46d0f9039bBill Wendling if (Frame.Lsda) 11829056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Lsda, Size); 11834498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 11844498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No LSDA 11859056e9032001a2d47057cecec5e39895cbc31799Bill Wendling 1186e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling return true; 1187e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling} 1188e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 118925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolaconst MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, 119025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 119125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 119225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 119316d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola bool IsSignalFrame, 119425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding) { 119589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 11960e6a052331f674dd70e28af41f654a7874405eabEvan Cheng const MCRegisterInfo &MRI = context.getRegisterInfo(); 1197e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); 11983c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling bool verboseAsm = streamer.isVerboseAsm(); 1199514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 1200514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola MCSymbol *sectionStart; 1201e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng if (MOFI->isFunctionEHFrameSymbolPrivate() || !IsEH) 1202514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.CreateTempSymbol(); 1203514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola else 1204514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum)); 1205514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 12063c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling streamer.EmitLabel(sectionStart); 1207514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola CIENum++; 1208514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 12096a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling MCSymbol *sectionEnd = context.CreateTempSymbol(); 121089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 121189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 121289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart, 121389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *sectionEnd, 4); 12143c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Length"); 12159266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 121689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 121789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE ID 121840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned CIE_ID = IsEH ? 0 : -1; 12193c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE ID Tag"); 122040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitIntValue(CIE_ID, 4); 122189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 122289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Version 12233c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("DW_CIE_VERSION"); 122489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1); 122589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 122689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation String 122789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola SmallString<8> Augmentation; 122840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 12293c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Augmentation"); 123040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "z"; 123140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) 123240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "P"; 123340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 123440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "L"; 123540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "R"; 123616d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola if (IsSignalFrame) 123716d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Augmentation += "S"; 123868ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher streamer.EmitBytes(Augmentation.str()); 123940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 124089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(0, 1); 124189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 124289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Code Alignment Factor 12433c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Code Alignment Factor"); 124489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(1); 124589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 124689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Data Alignment Factor 12473c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Data Alignment Factor"); 124889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitSLEB128IntValue(getDataAlignmentFactor(streamer)); 124989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 125089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Return Address Register 12513c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Return Address Column"); 12520e6a052331f674dd70e28af41f654a7874405eabEvan Cheng streamer.EmitULEB128IntValue(MRI.getDwarfRegNum(MRI.getRARegister(), true)); 125389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 125489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data Length (optional) 12551f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 12561f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola unsigned augmentationLength = 0; 125740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 125840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 125940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 126040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 126140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 126240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, personalityEncoding); 126340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 126440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 126540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 126640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 12671f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola augmentationLength += 1; 12681f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 12693c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("Augmentation Size"); 127040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 127189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 127240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data (optional) 127340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 127440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 12753c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EmitEncodingByte(streamer, personalityEncoding, 12763c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling "Personality Encoding"); 127740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 12783c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("Personality"); 127940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola EmitPersonality(streamer, *personality, personalityEncoding); 128040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 12813c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 128240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 12833c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding"); 12843c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 128540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 1286203576aa0cb9d8bf2d2e4d910ebab4b7a63262aeEvan Cheng EmitEncodingByte(streamer, MOFI->getFDEEncoding(UsingCFI), 12873c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling "FDE Encoding"); 1288bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 128989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 129089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Initial Instructions 129189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 12922d28617de2b0b731c08d1af9e830f31e14ac75b4Evan Cheng const MCAsmInfo &MAI = context.getAsmInfo(); 12932d28617de2b0b731c08d1af9e830f31e14ac75b4Evan Cheng const std::vector<MachineMove> &Moves = MAI.getInitialFrameState(); 1294fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola std::vector<MCCFIInstruction> Instructions; 1295fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1296fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (int i = 0, n = Moves.size(); i != n; ++i) { 1297b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola MCSymbol *Label = Moves[i].getLabel(); 1298b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Dst = 12990e6a052331f674dd70e28af41f654a7874405eabEvan Cheng TranslateMachineLocation(MRI, Moves[i].getDestination()); 1300b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Src = 13010e6a052331f674dd70e28af41f654a7874405eabEvan Cheng TranslateMachineLocation(MRI, Moves[i].getSource()); 130228c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola 130328c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola if (Dst.isReg()) { 130428c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola assert(Dst.getReg() == MachineLocation::VirtualFP); 130528c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola assert(!Src.isReg()); 130628c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola MCCFIInstruction Inst = 130728c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola MCCFIInstruction::createDefCfa(Label, Src.getReg(), -Src.getOffset()); 130828c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola Instructions.push_back(Inst); 130928c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola } else { 131028c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola assert(Src.isReg()); 131128c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola unsigned Reg = Src.getReg(); 131228c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola int Offset = Dst.getOffset(); 131328c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola MCCFIInstruction Inst = 13147f74d2c2c197eec76ae2b41fed9c227c0dcc04cbRafael Espindola MCCFIInstruction::createOffset(Label, Reg, Offset); 131528c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola Instructions.push_back(Inst); 131628c9ea3c13dfb8f6bb3226ba511d189135fcb140Rafael Espindola } 1317fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 131889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1319b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, Instructions, NULL); 132089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 132189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 13221be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng streamer.EmitValueToAlignment(IsEH 13231be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng ? 4 : context.getAsmInfo().getPointerSize()); 132489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 132589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(sectionEnd); 132689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return *sectionStart; 132789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 132889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 132925f492e77858dc5a95fcd7180e73aff47925b668Rafael EspindolaMCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer, 133025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 13319f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame) { 1332bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCContext &context = streamer.getContext(); 1333bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeStart = context.CreateTempSymbol(); 1334bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeEnd = context.CreateTempSymbol(); 1335e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); 13362541c41f3e2af94585e14353a91f02facd65e415Bill Wendling bool verboseAsm = streamer.isVerboseAsm(); 133789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 13385fbe5e783ee0c5ae27c17490a752d7e603e84ed2Evan Cheng if (IsEH && frame.Function && !MOFI->isFunctionEHFrameSymbolPrivate()) { 13392541c41f3e2af94585e14353a91f02facd65e415Bill Wendling MCSymbol *EHSym = 13402541c41f3e2af94585e14353a91f02facd65e415Bill Wendling context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh")); 13418bca4106dfc2945723251db10e340183f3e372ddRafael Espindola streamer.EmitEHSymAttributes(frame.Function, EHSym); 1342a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola streamer.EmitLabel(EHSym); 1343a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola } 1344a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola 134589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 134689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0); 13472541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE Length"); 13489266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 134989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 135089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(fdeStart); 1351e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola 135289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE Pointer 1353e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 13540d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola if (IsEH) { 13550d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart, 13560d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola 0); 13572541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE CIE Offset"); 13580d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitAbsValue(offset, 4); 13592241e51406f7bae369d6103cf3464e70f74c4af9Rafael Espindola } else if (!asmInfo.doesDwarfUseRelocationsAcrossSections()) { 1360e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart, 1361e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola cieStart, 0); 1362e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola streamer.EmitAbsValue(offset, 4); 13630d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } else { 13640d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitSymbolValue(&cieStart, 4); 13650d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } 13662541c41f3e2af94585e14353a91f02facd65e415Bill Wendling 136789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Begin 13680c5602de8c0dfa716f54306a1c540b98ab803584Nick Lewycky unsigned PCEncoding = IsEH ? MOFI->getFDEEncoding(UsingCFI) 13690c5602de8c0dfa716f54306a1c540b98ab803584Nick Lewycky : (unsigned)dwarf::DW_EH_PE_absptr; 13700c5602de8c0dfa716f54306a1c540b98ab803584Nick Lewycky unsigned PCSize = getSizeForEncoding(streamer, PCEncoding); 13710c5602de8c0dfa716f54306a1c540b98ab803584Nick Lewycky EmitSymbol(streamer, *frame.Begin, PCEncoding, "FDE initial location"); 137289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 137389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Range 137489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin, 137589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *frame.End, 0); 13762541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE address range"); 13770c5602de8c0dfa716f54306a1c540b98ab803584Nick Lewycky streamer.EmitAbsValue(Range, PCSize); 137889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 137940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 138040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data Length 138140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned augmentationLength = 0; 13821f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 138340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 138440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, frame.LsdaEncoding); 13851f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 13862541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("Augmentation size"); 138740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 138889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 138940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data 139040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 13912541c41f3e2af94585e14353a91f02facd65e415Bill Wendling EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding, 13922541c41f3e2af94585e14353a91f02facd65e415Bill Wendling "Language Specific Data Area"); 139340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 13944892dff07e7d99eb37aee868c4f2c91e9c7eba14Rafael Espindola 139589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Call Frame Instructions 139689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1397b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, frame.Instructions, frame.Begin); 13985bba08425374ca36fe5fbc7423ce1a09858e4097Rafael Espindola 139989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 14000c5602de8c0dfa716f54306a1c540b98ab803584Nick Lewycky streamer.EmitValueToAlignment(PCSize); 1401dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola 1402dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola return fdeEnd; 140389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 140489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 140519282365147f498a60463d250dbed2f8e1b81861Benjamin Kramernamespace { 140619282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer struct CIEKey { 140716d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1, false); } 140816d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0, false); } 140919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer 141019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer CIEKey(const MCSymbol* Personality_, unsigned PersonalityEncoding_, 141116d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola unsigned LsdaEncoding_, bool IsSignalFrame_) : 141216d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Personality(Personality_), PersonalityEncoding(PersonalityEncoding_), 141316d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola LsdaEncoding(LsdaEncoding_), IsSignalFrame(IsSignalFrame_) { 141419282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer } 141519282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer const MCSymbol* Personality; 141619282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned PersonalityEncoding; 141719282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned LsdaEncoding; 141816d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola bool IsSignalFrame; 141919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer }; 142019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer} 1421bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 1422bdc3167c086dd4358e24692075db5e7784140843Rafael Espindolanamespace llvm { 1423bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola template <> 1424bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola struct DenseMapInfo<CIEKey> { 1425bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getEmptyKey() { 142619282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getEmptyKey(); 1427bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1428bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getTombstoneKey() { 142919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getTombstoneKey(); 1430bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1431bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static unsigned getHashValue(const CIEKey &Key) { 14327484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer return static_cast<unsigned>(hash_combine(Key.Personality, 14337484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer Key.PersonalityEncoding, 14347484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer Key.LsdaEncoding, 14357484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer Key.IsSignalFrame)); 1436bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1437bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static bool isEqual(const CIEKey &LHS, 1438bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola const CIEKey &RHS) { 1439bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola return LHS.Personality == RHS.Personality && 1440bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola LHS.PersonalityEncoding == RHS.PersonalityEncoding && 144116d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola LHS.LsdaEncoding == RHS.LsdaEncoding && 144216d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola LHS.IsSignalFrame == RHS.IsSignalFrame; 1443bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1444bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola }; 1445bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola} 1446bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 1447a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendlingvoid MCDwarfFrameEmitter::Emit(MCStreamer &Streamer, 1448a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling bool UsingCFI, 1449a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling bool IsEH) { 1450a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCContext &Context = Streamer.getContext(); 1451e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng MCObjectFileInfo *MOFI = 1452e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const_cast<MCObjectFileInfo*>(Context.getObjectFileInfo()); 14531424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling FrameEmitterImpl Emitter(UsingCFI, IsEH); 1454d8ab8e9707e6170218ce82516d15b36f54b4bc1cBill Wendling ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getFrameInfos(); 14551424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 1456d8ab8e9707e6170218ce82516d15b36f54b4bc1cBill Wendling // Emit the compact unwind info if available. 14577a13b72bbbadaa9274f6a58774970b9b95706330Bill Wendling if (IsEH && MOFI->getCompactUnwindSection()) 14581424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) { 14591424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i); 1460a2ff3e2c3c0d8be862525c91f7b0e153480f4f5eBill Wendling if (Frame.CompactUnwindEncoding) 1461d8ab8e9707e6170218ce82516d15b36f54b4bc1cBill Wendling Emitter.EmitCompactUnwind(Streamer, Frame); 14621424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling } 14631424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 1464e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCSection &Section = IsEH ? *MOFI->getEHFrameSection() : 1465e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng *MOFI->getDwarfFrameSection(); 1466a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.SwitchSection(&Section); 1467a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCSymbol *SectionStart = Context.CreateTempSymbol(); 1468a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(SectionStart); 14691424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling Emitter.setSectionStart(SectionStart); 1470a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling 1471a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCSymbol *FDEEnd = NULL; 1472bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola DenseMap<CIEKey, const MCSymbol*> CIEStarts; 1473d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 147440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola const MCSymbol *DummyDebugKey = NULL; 14751424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling for (unsigned i = 0, n = FrameArray.size(); i < n; ++i) { 14761424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling const MCDwarfFrameInfo &Frame = FrameArray[i]; 1477a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling CIEKey Key(Frame.Personality, Frame.PersonalityEncoding, 147816d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Frame.LsdaEncoding, Frame.IsSignalFrame); 1479a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey; 1480a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling if (!CIEStart) 1481a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling CIEStart = &Emitter.EmitCIE(Streamer, Frame.Personality, 1482a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Frame.PersonalityEncoding, Frame.Lsda, 148316d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Frame.IsSignalFrame, 1484a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Frame.LsdaEncoding); 1485e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1486a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling FDEEnd = Emitter.EmitFDE(Streamer, *CIEStart, Frame); 1487e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1488dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola if (i != n - 1) 1489a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(FDEEnd); 1490dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola } 1491d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 14921be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng Streamer.EmitValueToAlignment(Context.getAsmInfo().getPointerSize()); 1493a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling if (FDEEnd) 1494a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(FDEEnd); 149589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 1496245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1497245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EmitAdvanceLoc(MCStreamer &Streamer, 1498245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint64_t AddrDelta) { 1499245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola SmallString<256> Tmp; 1500245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola raw_svector_ostream OS(Tmp); 15014eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola MCDwarfFrameEmitter::EncodeAdvanceLoc(AddrDelta, OS); 150268ca56285f9b6e82eb16ff8ea02a301f2c489faeEric Christopher Streamer.EmitBytes(OS.str()); 1503245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1504245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1505245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EncodeAdvanceLoc(uint64_t AddrDelta, 15064eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola raw_ostream &OS) { 1507245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola // FIXME: Assumes the code alignment factor is 1. 15083b78cdc57ae25ff021fd67171a7c82d533477a19Rafael Espindola if (AddrDelta == 0) { 15094eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUIntN(6, AddrDelta)) { 1510245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint8_t Opcode = dwarf::DW_CFA_advance_loc | AddrDelta; 1511245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << Opcode; 15124eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<8>(AddrDelta)) { 1513245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc1); 1514245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(AddrDelta); 15154eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<16>(AddrDelta)) { 1516a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 1517245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc2); 1518a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 1519a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 1520245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } else { 1521a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 1522245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola assert(isUInt<32>(AddrDelta)); 1523245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc4); 1524a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 1525a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 1526a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 16) & 0xff); 1527a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 24) & 0xff); 1528a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola 1529245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 1530245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1531