MCDwarf.cpp revision 2d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3
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" 11e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCAsmInfo.h" 12e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCContext.h" 13e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCObjectFileInfo.h" 14e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCObjectWriter.h" 15e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng#include "llvm/MC/MCRegisterInfo.h" 16ad8aaa069cfdb3bdc32b1becc8881f67b5272e14Rafael Espindola#include "llvm/MC/MCStreamer.h" 17c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCSymbol.h" 18c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCExpr.h" 197cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/Debug.h" 20fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola#include "llvm/Support/ErrorHandling.h" 217cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/raw_ostream.h" 222d39a0e52df9ce050bd4e2de3a2ecca8fd9a87c3Jim Grosbach#include "llvm/Support/LEB128.h" 2394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby#include "llvm/Support/Path.h" 2494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby#include "llvm/Support/SourceMgr.h" 257484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer#include "llvm/ADT/Hashing.h" 262b2dc7c4bee01071410df0e3027117b47ce48cedBill Wendling#include "llvm/ADT/SmallString.h" 272b2dc7c4bee01071410df0e3027117b47ce48cedBill Wendling#include "llvm/ADT/Twine.h" 2894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby#include "llvm/Config/config.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++) { 272c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfDirs[i], 0); // the DirectoryName 273c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // 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++) { 281c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfFiles[i]->getName(), 0); // FileName 282c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // 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); 345c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(OS.str(), /*AddrSpace=*/0); 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 4287cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::dump() const { 4297cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby print(dbgs()); 4307cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 431c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 43294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// Utility function to write a tuple for .debug_abbrev. 43394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderbystatic void EmitAbbrev(MCStreamer *MCOS, uint64_t Name, uint64_t Form) { 43494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(Name); 43594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(Form); 43694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 43794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 43894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits 43994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// the data for .debug_abbrev section which contains three DIEs. 44094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderbystatic void EmitGenDwarfAbbrev(MCStreamer *MCOS) { 44194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 44294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection()); 44394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 44494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_TAG_compile_unit DIE abbrev (1). 44594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(1); 44694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_compile_unit); 44794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1); 44894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4); 44994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr); 45094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr); 45194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string); 45294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string); 45394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef DwarfDebugFlags = context.getDwarfDebugFlags(); 45494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (!DwarfDebugFlags.empty()) 45594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string); 45694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_producer, dwarf::DW_FORM_string); 45794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_language, dwarf::DW_FORM_data2); 45894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 45994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 46038fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // DW_TAG_label DIE abbrev (2). 46194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(2); 46238fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_label); 46394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_yes, 1); 46494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_name, dwarf::DW_FORM_string); 46594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data4); 46694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data4); 46794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr); 46894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag); 46994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 47094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 47194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_TAG_unspecified_parameters DIE abbrev (3). 47294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(3); 47394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(dwarf::DW_TAG_unspecified_parameters); 47494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_CHILDREN_no, 1); 47594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitAbbrev(MCOS, 0, 0); 47694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 47794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Terminate the abbreviations for this compilation unit. 47894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 47994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 48094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 48194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the data for 48294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// .debug_aranges section. Which contains a header and a table of pairs of 48394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// PointerSize'ed values for the address and size of section(s) with line table 48494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// entries (just the default .text in our case) and a terminating pair of zeros. 48594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderbystatic void EmitGenDwarfAranges(MCStreamer *MCOS) { 48694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 48794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 48894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create a symbol at the end of the section that we are creating the dwarf 48994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // debugging info to use later in here as part of the expression to calculate 49094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // the size of the section for the table. 49194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getGenDwarfSection()); 49294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *SectionEndSym = context.CreateTempSymbol(); 49394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(SectionEndSym); 49494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.setGenDwarfSectionEndSym(SectionEndSym); 49594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 49694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection()); 49794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 49894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // This will be the length of the .debug_aranges section, first account for 49994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // the size of each item in the header (see below where we emit these items). 50094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int Length = 4 + 2 + 4 + 1 + 1; 50194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 50294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Figure the padding after the header before the table of address and size 50394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // pairs who's values are PointerSize'ed. 50494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCAsmInfo &asmInfo = context.getAsmInfo(); 50594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int AddrSize = asmInfo.getPointerSize(); 50694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int Pad = 2 * AddrSize - (Length & (2 * AddrSize - 1)); 50794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Pad == 2 * AddrSize) 50894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Pad = 0; 50994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += Pad; 51094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 51194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the size of the pair of PointerSize'ed values for the address and size 51294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // of the one default .text section we have in the table. 51394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += 2 * AddrSize; 51494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // And the pair of terminating zeros. 51594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Length += 2 * AddrSize; 51694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 51794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 51894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Emit the header for this section. 51994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte length not including the 4 byte value for the length. 52094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(Length - 4, 4); 52194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 2 byte version, which is 2. 52294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(2, 2); 52394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte offset to the compile unit in the .debug_info from the start 52494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // of the .debug_info, it is at the start of that section so this is zero. 52594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 4); 52694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of an address. 52794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(AddrSize, 1); 52894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of a segment descriptor, we use a value of zero. 52994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 53094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Align the header with the padding if needed, before we put out the table. 53194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby for(int i = 0; i < Pad; i++) 53294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 53394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 53494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Now emit the table of pairs of PointerSize'ed values for the section(s) 53594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // address and size, in our case just the one default .text section. 53694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Addr = MCSymbolRefExpr::Create( 53794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getGenDwarfSectionStartSym(), MCSymbolRefExpr::VK_None, context); 53894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Size = MakeStartMinusEndExpr(*MCOS, 53994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby *context.getGenDwarfSectionStartSym(), *SectionEndSym, 0); 54094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Addr, AddrSize); 54194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Size, AddrSize); 54294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 54394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // And finally the pair of terminating zeros. 54494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, AddrSize); 54594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, AddrSize); 54694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 54794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 54894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the data for 54994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// .debug_info section which contains three parts. The header, the compile_unit 55038fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby// DIE and a list of label DIEs. 551489d67927172941bf59b9f4829ab8910814fea24Rafael Espindolastatic void EmitGenDwarfInfo(MCStreamer *MCOS, 552489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola const MCSymbol *AbbrevSectionSymbol, 553489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola const MCSymbol *LineSectionSymbol) { 55494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 55594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 5562684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection()); 55794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 55894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create a symbol at the start and end of this section used in here for the 55994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // expression to calculate the length in the header. 56094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *InfoStart = context.CreateTempSymbol(); 56194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(InfoStart); 56294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *InfoEnd = context.CreateTempSymbol(); 56394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 56494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // First part: the header. 56594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 56694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte total length of the information for this compilation unit, not 56794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // including these 4 bytes. 56894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Length = MakeStartMinusEndExpr(*MCOS, *InfoStart, *InfoEnd, 4); 56994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Length, 4); 57094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 2 byte DWARF version, which is 2. 57294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(2, 2); 57394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 57494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 4 byte offset to the debug abbrevs from the start of the .debug_abbrev, 57594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // it is at the start of that section so this is zero. 576489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola if (AbbrevSectionSymbol) { 577489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitSymbolValue(AbbrevSectionSymbol, 4); 578489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } else { 579489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitIntValue(0, 4); 580489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } 58194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 58294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCAsmInfo &asmInfo = context.getAsmInfo(); 58394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int AddrSize = asmInfo.getPointerSize(); 58494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The 1 byte size of an address. 58594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(AddrSize, 1); 58694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 58794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Second part: the compile_unit DIE. 58894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 58994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The DW_TAG_compile_unit DIE abbrev (1). 59094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(1); 59194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 59294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_AT_stmt_list, a 4 byte offset from the start of the .debug_line section, 59394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // which is at the start of that section so this is zero. 594489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola if (LineSectionSymbol) { 595489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitSymbolValue(LineSectionSymbol, 4); 596489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } else { 597489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitIntValue(0, 4); 598489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } 59994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 60094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_low_pc, the first address of the default .text section. 60194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *Start = MCSymbolRefExpr::Create( 60294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getGenDwarfSectionStartSym(), MCSymbolRefExpr::VK_None, context); 60394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(Start, AddrSize); 60494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 60594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_high_pc, the last address of the default .text section. 60694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *End = MCSymbolRefExpr::Create( 60794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getGenDwarfSectionEndSym(), MCSymbolRefExpr::VK_None, context); 60894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(End, AddrSize); 60994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 61094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_name, the name of the source file. Reconstruct from the first directory 61194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // and file table entries. 61294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const std::vector<StringRef> &MCDwarfDirs = 61394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby context.getMCDwarfDirs(); 61494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (MCDwarfDirs.size() > 0) { 61594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(MCDwarfDirs[0], 0); 61694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes("/", 0); 61794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 61894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const std::vector<MCDwarfFile *> &MCDwarfFiles = 61994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->getContext().getMCDwarfFiles(); 62094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(MCDwarfFiles[1]->getName(), 0); 62194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 62294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 62394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_comp_dir, the working directory the assembly was done in. 62494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby llvm::sys::Path CWD = llvm::sys::Path::GetCurrentDirectory(); 62594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(StringRef(CWD.c_str()), 0); 62694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 62794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 62894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_APPLE_flags, the command line arguments of the assembler tool. 62994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef DwarfDebugFlags = context.getDwarfDebugFlags(); 63094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (!DwarfDebugFlags.empty()){ 63194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(DwarfDebugFlags, 0); 63294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 63394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 63494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 63594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_producer, the version of the assembler tool. 63694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(StringRef("llvm-mc (based on LLVM "), 0); 63794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(StringRef(PACKAGE_VERSION), 0); 63894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(StringRef(")"), 0); 63994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 64094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 64194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_language, a 4 byte value. We use DW_LANG_Mips_Assembler as the dwarf2 64294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // draft has no standard code for assembler. 64394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LANG_Mips_Assembler, 2); 64494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 64538fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // Third part: the list of label DIEs. 64694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 64711c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Loop on saved info for dwarf labels and create the DIEs for them. 64811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby const std::vector<const MCGenDwarfLabelEntry *> &Entries = 64911c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby MCOS->getContext().getMCGenDwarfLabelEntries(); 65011c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby for (std::vector<const MCGenDwarfLabelEntry *>::const_iterator it = 65194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Entries.begin(), ie = Entries.end(); it != ie; 65294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby ++it) { 65311c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby const MCGenDwarfLabelEntry *Entry = *it; 65494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 65538fdb7d9fc40e9f29c3156b6625cac8d91d562e1Kevin Enderby // The DW_TAG_label DIE abbrev (2). 65694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(2); 65794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 65894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_name, of the label without any leading underbar. 65994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitBytes(Entry->getName(), 0); 66094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); // NULL byte to terminate the string. 66194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 66294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_decl_file, index into the file table. 66394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(Entry->getFileNumber(), 4); 66494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 66594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_decl_line, source line number. 66694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(Entry->getLineNumber(), 4); 66794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 66894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // AT_low_pc, start address of the label. 66994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby const MCExpr *AT_low_pc = MCSymbolRefExpr::Create(Entry->getLabel(), 67094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbolRefExpr::VK_None, context); 67194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitAbsValue(AT_low_pc, AddrSize); 67294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // DW_AT_prototyped, a one byte flag value of 0 saying we have no prototype. 67494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 67594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // The DW_TAG_unspecified_parameters DIE abbrev (3). 67794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitULEB128IntValue(3); 67894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 67994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the NULL DIE terminating the DW_TAG_unspecified_parameters DIE's. 68094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 68194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 68211c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Deallocate the MCGenDwarfLabelEntry classes that saved away the info 68311c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // for the dwarf labels. 68411c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby for (std::vector<const MCGenDwarfLabelEntry *>::const_iterator it = 68594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Entries.begin(), ie = Entries.end(); it != ie; 68694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby ++it) { 68711c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby const MCGenDwarfLabelEntry *Entry = *it; 68894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby delete Entry; 68994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby } 69094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 69194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Add the NULL DIE terminating the Compile Unit DIE's. 69294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitIntValue(0, 1); 69394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 69494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Now set the value of the symbol at the end of the info section. 69594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(InfoEnd); 69694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 69794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 69894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 69994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this emits the Dwarf 70094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// sections. 70194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 702489d67927172941bf59b9f4829ab8910814fea24Rafael Espindolavoid MCGenDwarfInfo::Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol) { 70394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create the dwarf sections in this order (.debug_line already created). 70494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 705489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola const MCAsmInfo &AsmInfo = context.getAsmInfo(); 70694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection()); 70794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection()); 708489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCSymbol *AbbrevSectionSymbol; 7092241e51406f7bae369d6103cf3464e70f74c4af9Rafael Espindola if (AsmInfo.doesDwarfUseRelocationsAcrossSections()) { 710489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola AbbrevSectionSymbol = context.CreateTempSymbol(); 711489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola MCOS->EmitLabel(AbbrevSectionSymbol); 712489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } else { 713489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola AbbrevSectionSymbol = NULL; 714489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola LineSectionSymbol = NULL; 715489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola } 71694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection()); 71794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 71894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // If there are no line table entries then do not emit any section contents. 71994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (context.getMCLineSections().empty()) 72094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 72194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 72294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_aranges section. 72394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitGenDwarfAranges(MCOS); 72494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 72594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_abbrev section. 72694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby EmitGenDwarfAbbrev(MCOS); 72794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 72894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Output the data for .debug_info section. 729489d67927172941bf59b9f4829ab8910814fea24Rafael Espindola EmitGenDwarfInfo(MCOS, AbbrevSectionSymbol, LineSectionSymbol); 73094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 73194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 73294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 73394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// When generating dwarf for assembly source files this is called when symbol 73494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// for a label is created. If this symbol is not a temporary and is in the 73594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// section that dwarf is being generated for, save the needed info to create 73611c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby// a dwarf label. 73794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby// 73811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderbyvoid MCGenDwarfLabelEntry::Make(MCSymbol *Symbol, MCStreamer *MCOS, 73994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby SourceMgr &SrcMgr, SMLoc &Loc) { 7403c3cdcc270515de95a4982db3073b9fdf44a5c2eEric Christopher // We won't create dwarf labels for temporary symbols or symbols not in 74194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // the default text. 74294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Symbol->isTemporary()) 74394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 74494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCContext &context = MCOS->getContext(); 74594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (context.getGenDwarfSection() != MCOS->getCurrentSection()) 74694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby return; 74794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 74811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // The dwarf label's name does not have the symbol name's leading 74994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // underbar if any. 75094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby StringRef Name = Symbol->getName(); 75194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby if (Name.startswith("_")) 75294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby Name = Name.substr(1, Name.size()-1); 75394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 75411c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // Get the dwarf file number to be used for the dwarf label. 75594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby unsigned FileNumber = context.getGenDwarfFileNumber(); 75694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 75794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Finding the line number is the expensive part which is why we just don't 75811c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby // pass it in as for some symbols we won't create a dwarf label. 75994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby int CurBuffer = SrcMgr.FindBufferContainingLoc(Loc); 76094c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby unsigned LineNumber = SrcMgr.FindLineNumber(Loc, CurBuffer); 76194c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 76294c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // We create a temporary symbol for use for the AT_high_pc and AT_low_pc 76394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // values so that they don't have things like an ARM thumb bit from the 76494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // original symbol. So when used they won't get a low bit set after 76594c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // relocation. 76694c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCSymbol *Label = context.CreateTempSymbol(); 76794c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby MCOS->EmitLabel(Label); 76894c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 76994c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby // Create and entry for the info and add it to the other entries. 7702684d9e3c702b2ef9fd430155d94671d12fa994fJim Grosbach MCGenDwarfLabelEntry *Entry = 77111c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby new MCGenDwarfLabelEntry(Name, FileNumber, LineNumber, Label); 77211c2defa9157bd589cb322218c718c4492ed5746Kevin Enderby MCOS->getContext().addMCGenDwarfLabelEntry(Entry); 77394c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby} 77494c2e85bea1ab1b837a4c055ccc83d5cd32dd027Kevin Enderby 77589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic int getDataAlignmentFactor(MCStreamer &streamer) { 77689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 7771be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCAsmInfo &asmInfo = context.getAsmInfo(); 77889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int size = asmInfo.getPointerSize(); 7791be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng if (asmInfo.isStackGrowthDirectionUp()) 78089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return size; 7811be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng else 7821be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng return -size; 78389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 78489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 785abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic unsigned getSizeForEncoding(MCStreamer &streamer, 786abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned symbolEncoding) { 78725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCContext &context = streamer.getContext(); 78825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned format = symbolEncoding & 0x0f; 78925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola switch (format) { 790858143816d43e58b17bfd11cb1b57afbd7f0f893Craig Topper default: llvm_unreachable("Unknown Encoding"); 79125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_absptr: 79225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_signed: 7931be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng return context.getAsmInfo().getPointerSize(); 79425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata2: 79525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata2: 796abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 2; 79725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata4: 79825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata4: 799abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 4; 80025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata8: 80125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata8: 802abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 8; 80325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola } 804abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola} 805abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola 806abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol, 8072541c41f3e2af94585e14353a91f02facd65e415Bill Wendling unsigned symbolEncoding, const char *comment = 0) { 808a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola MCContext &context = streamer.getContext(); 809a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 810a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCExpr *v = asmInfo.getExprForFDESymbol(&symbol, 811debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 812a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola streamer); 813abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 8142541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (streamer.isVerboseAsm() && comment) streamer.AddComment(comment); 815debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitAbsValue(v, size); 81625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 81725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 818bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindolastatic void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol, 819bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned symbolEncoding) { 820bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola MCContext &context = streamer.getContext(); 821bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 822debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola const MCExpr *v = asmInfo.getExprForPersonalitySymbol(&symbol, 823debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 824debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer); 825bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 826debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitValue(v, size); 827bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola} 828bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola 82925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolastatic const MachineLocation TranslateMachineLocation( 8300e6a052331f674dd70e28af41f654a7874405eabEvan Cheng const MCRegisterInfo &MRI, 83125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &Loc) { 83225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ? 83325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation::VirtualFP : 8340e6a052331f674dd70e28af41f654a7874405eabEvan Cheng unsigned(MRI.getDwarfRegNum(Loc.getReg(), true)); 83525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &NewLoc = Loc.isReg() ? 83625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset()); 83725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola return NewLoc; 83825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 83925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 84025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolanamespace { 84125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola class FrameEmitterImpl { 84225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola int CFAOffset; 843514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola int CIENum; 8445426a9ee37667660935d80841c5392d78e254318Rafael Espindola bool UsingCFI; 84540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola bool IsEH; 846e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCSymbol *SectionStart; 84725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola public: 8481424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling FrameEmitterImpl(bool usingCFI, bool isEH) 8491424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling : CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH), 8501424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling SectionStart(0) {} 8511424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 8521424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling void setSectionStart(const MCSymbol *Label) { SectionStart = Label; } 85325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 854e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// EmitCompactUnwind - Emit the unwind information in a compact way. If 855e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// we're successful, return 'true'. Otherwise, return 'false' and it will 856e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// emit the normal CIE and FDE. 857e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling bool EmitCompactUnwind(MCStreamer &streamer, 858e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCDwarfFrameInfo &frame); 859e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 86025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &EmitCIE(MCStreamer &streamer, 86125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 86225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 86325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 86416d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola bool IsSignalFrame, 86525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding); 86625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *EmitFDE(MCStreamer &streamer, 86725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 8689f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame); 86925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstructions(MCStreamer &streamer, 87025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 87125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel); 87225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstruction(MCStreamer &Streamer, 87325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr); 87425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola }; 8753c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 8763c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling} // end anonymous namespace 8773c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 8783c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendlingstatic void EmitEncodingByte(MCStreamer &Streamer, unsigned Encoding, 8793c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling StringRef Prefix) { 8803c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (Streamer.isVerboseAsm()) { 881eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer const char *EncStr; 8823c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling switch (Encoding) { 883eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer default: EncStr = "<unknown encoding>"; break; 884eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_absptr: EncStr = "absptr"; break; 885eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_omit: EncStr = "omit"; break; 886eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel: EncStr = "pcrel"; break; 887eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_udata4: EncStr = "udata4"; break; 888eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_udata8: EncStr = "udata8"; break; 889eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_sdata4: EncStr = "sdata4"; break; 890eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_sdata8: EncStr = "sdata8"; break; 891eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata4: 892eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "pcrel udata4"; 893eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 894eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4: 895eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "pcrel sdata4"; 896eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 897eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8: 898eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "pcrel udata8"; 899eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 900eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8: 901eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer EncStr = "screl sdata8"; 902eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9033c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4: 9043c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel udata4"; 905eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9063c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4: 9073c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel sdata4"; 908eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9093c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8: 9103c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel udata8"; 911eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9123c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8: 9133c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel sdata8"; 914eb9fa666f9ea27334aa728d7b6b435b5c20a2c4cBenjamin Kramer break; 9153c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling } 9163c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 9173c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.AddComment(Twine(Prefix) + " = " + EncStr); 9183c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling } 9193c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 9203c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.EmitIntValue(Encoding, 1); 92125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 92225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 92325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, 92425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr) { 925fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola int dataAlignmentFactor = getDataAlignmentFactor(Streamer); 926efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling bool VerboseAsm = Streamer.isVerboseAsm(); 92789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 928fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola switch (Instr.getOperation()) { 92925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case MCCFIInstruction::Move: 93025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case MCCFIInstruction::RelMove: { 931fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MachineLocation &Dst = Instr.getDestination(); 932fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MachineLocation &Src = Instr.getSource(); 9335d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola const bool IsRelative = Instr.getOperation() == MCCFIInstruction::RelMove; 93489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 93589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // If advancing cfa. 93689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { 93789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.getReg() == MachineLocation::VirtualFP) { 938efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_offset"); 939fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); 94089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 941efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa"); 942fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); 943efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + 944efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling Twine(Src.getReg())); 945b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola Streamer.EmitULEB128IntValue(Src.getReg()); 94689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 94789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 9485d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola if (IsRelative) 9495d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola CFAOffset += Src.getOffset(); 9505d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola else 9515d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola CFAOffset = -Src.getOffset(); 9525d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola 953efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset " + Twine(CFAOffset))); 954e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(CFAOffset); 955fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 95689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 95789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 95889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { 95989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola assert(Dst.isReg() && "Machine move not supported yet."); 960efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_register"); 961fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); 962efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Dst.getReg())); 963b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola Streamer.EmitULEB128IntValue(Dst.getReg()); 964fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 96589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 96689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 967b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola unsigned Reg = Src.getReg(); 96825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola int Offset = Dst.getOffset(); 96925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola if (IsRelative) 97025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset -= CFAOffset; 97125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset = Offset / dataAlignmentFactor; 97289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 97389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Offset < 0) { 974efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended_sf"); 975fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1); 976efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 977fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitULEB128IntValue(Reg); 978efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 979fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitSLEB128IntValue(Offset); 98089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else if (Reg < 64) { 981e08d4335ad29d74008222b4d7ac91c153ed66becBill Wendling if (VerboseAsm) Streamer.AddComment(Twine("DW_CFA_offset + Reg(") + 982e08d4335ad29d74008222b4d7ac91c153ed66becBill Wendling Twine(Reg) + ")"); 983fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1); 984efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 985eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 98689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 987efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended"); 988fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1); 989efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 990eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 991efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 992eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 993fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 994fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 995fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 996c25680f728f89dd43939b00049ee524fbf59b7beRafael Espindola case MCCFIInstruction::RememberState: 997efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_remember_state"); 998fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1); 999fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 1000c25680f728f89dd43939b00049ee524fbf59b7beRafael Espindola case MCCFIInstruction::RestoreState: 1001efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_restore_state"); 1002fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1); 1003fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 1004c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola case MCCFIInstruction::SameValue: { 1005c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola unsigned Reg = Instr.getDestination().getReg(); 1006efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_same_value"); 1007c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1); 1008efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 1009e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 1010c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola return; 1011c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola } 1012ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola case MCCFIInstruction::Restore: { 1013ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola unsigned Reg = Instr.getDestination().getReg(); 1014ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola if (VerboseAsm) { 1015ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola Streamer.AddComment("DW_CFA_restore"); 1016ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 1017ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola } 1018ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore | Reg, 1); 1019ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola return; 1020ed23bdb65fe86cdb7a38c8c1998ec965e6973966Rafael Espindola } 10216f0b181bc70318f8d5d4b9bdead7fc748677fe2aRafael Espindola case MCCFIInstruction::Escape: 10226f0b181bc70318f8d5d4b9bdead7fc748677fe2aRafael Espindola if (VerboseAsm) Streamer.AddComment("Escape bytes"); 10236f0b181bc70318f8d5d4b9bdead7fc748677fe2aRafael Espindola Streamer.EmitBytes(Instr.getValues(), 0); 10246f0b181bc70318f8d5d4b9bdead7fc748677fe2aRafael Espindola return; 1025fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 1026fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola llvm_unreachable("Unhandled case in switch"); 1027fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola} 1028fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1029fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// EmitFrameMoves - Emit frame instructions to describe the layout of the 1030fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// frame. 103125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstructions(MCStreamer &streamer, 103225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 103325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel) { 1034fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (unsigned i = 0, N = Instrs.size(); i < N; ++i) { 1035fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MCCFIInstruction &Instr = Instrs[i]; 1036fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *Label = Instr.getLabel(); 1037fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Throw out move if the label is invalid. 1038fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. 1039fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1040fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Advance row if new location. 1041fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (BaseLabel && Label) { 1042fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *ThisSym = Label; 1043fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (ThisSym != BaseLabel) { 1044d221cd676b44d8118b1db152ecc2168538479626Bill Wendling if (streamer.isVerboseAsm()) streamer.AddComment("DW_CFA_advance_loc4"); 1045fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym); 1046fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola BaseLabel = ThisSym; 1047fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 104889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 1049fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1050b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstruction(streamer, Instr); 105189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 105289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 105389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1054e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// EmitCompactUnwind - Emit the unwind information in a compact way. If we're 1055e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// successful, return 'true'. Otherwise, return 'false' and it will emit the 1056e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// normal CIE and FDE. 1057e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendlingbool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer, 1058e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCDwarfFrameInfo &Frame) { 1059e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling MCContext &Context = Streamer.getContext(); 1060e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = Context.getObjectFileInfo(); 10613c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling bool VerboseAsm = Streamer.isVerboseAsm(); 1062e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1063e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // range-start range-length compact-unwind-enc personality-func lsda 1064e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _foo LfooEnd-_foo 0x00000023 0 0 1065e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _bar LbarEnd-_bar 0x00000025 __gxx_personality except_tab1 1066e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1067e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .section __LD,__compact_unwind,regular,debug 1068e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1069e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _foo 1070e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _foo 1071e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L1,LfooEnd-_foo 1072e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L1 1073e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01010001 1074e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 1075e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 1076e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 1077e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _bar 1078e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _bar 1079e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L2,LbarEnd-_bar 1080e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L2 1081e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01020011 1082e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad __gxx_personality 1083e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad except_tab1 1084e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1085e52e3f2c020354c8e0e966b719152b08349d0334Bill Wendling uint32_t Encoding = Frame.CompactUnwindEncoding; 10866a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling if (!Encoding) return false; 10876a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling 10884bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling // The encoding needs to know we have an LSDA. 10894bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling if (Frame.Lsda) 10904bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Encoding |= 0x40000000; 10914bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling 1092e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng Streamer.SwitchSection(MOFI->getCompactUnwindSection()); 10933c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 1094e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Start 1095203576aa0cb9d8bf2d2e4d910ebab4b7a63262aeEvan Cheng unsigned FDEEncoding = MOFI->getFDEEncoding(UsingCFI); 10969056e9032001a2d47057cecec5e39895cbc31799Bill Wendling unsigned Size = getSizeForEncoding(Streamer, FDEEncoding); 10973c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Range Start"); 10989056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Function, Size); 1099e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1100e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Length 1101e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCExpr *Range = MakeStartMinusEndExpr(Streamer, *Frame.Begin, 1102e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling *Frame.End, 0); 11033c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Range Length"); 11049287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Streamer.EmitAbsValue(Range, 4); 11059287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 11069287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling // Compact Encoding 11079287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_udata4); 110870be28a5adba5bcae0c6dcd63f17592864c351fcBenjamin Kramer if (VerboseAsm) Streamer.AddComment("Compact Unwind Encoding: 0x" + 110970be28a5adba5bcae0c6dcd63f17592864c351fcBenjamin Kramer Twine::utohexstr(Encoding)); 11109287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Streamer.EmitIntValue(Encoding, Size); 11119287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 1112e52e3f2c020354c8e0e966b719152b08349d0334Bill Wendling 11139056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // Personality Function 11144bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr); 11153c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Personality Function"); 11164498d39680abe3970dc84dca973aff46d0f9039bBill Wendling if (Frame.Personality) 11179056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Personality, Size); 11184498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 11194498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No personality fn 11209056e9032001a2d47057cecec5e39895cbc31799Bill Wendling 11219056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // LSDA 11224498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Size = getSizeForEncoding(Streamer, Frame.LsdaEncoding); 11233c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("LSDA"); 11244498d39680abe3970dc84dca973aff46d0f9039bBill Wendling if (Frame.Lsda) 11259056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Lsda, Size); 11264498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 11274498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No LSDA 11289056e9032001a2d47057cecec5e39895cbc31799Bill Wendling 1129e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling return true; 1130e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling} 1131e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 113225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolaconst MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, 113325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 113425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 113525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 113616d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola bool IsSignalFrame, 113725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding) { 113889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 11390e6a052331f674dd70e28af41f654a7874405eabEvan Cheng const MCRegisterInfo &MRI = context.getRegisterInfo(); 1140e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); 11413c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling bool verboseAsm = streamer.isVerboseAsm(); 1142514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 1143514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola MCSymbol *sectionStart; 1144e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng if (MOFI->isFunctionEHFrameSymbolPrivate() || !IsEH) 1145514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.CreateTempSymbol(); 1146514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola else 1147514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum)); 1148514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 11493c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling streamer.EmitLabel(sectionStart); 1150514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola CIENum++; 1151514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 11526a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling MCSymbol *sectionEnd = context.CreateTempSymbol(); 115389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 115489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 115589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart, 115689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *sectionEnd, 4); 11573c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Length"); 11589266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 115989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 116089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE ID 116140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned CIE_ID = IsEH ? 0 : -1; 11623c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE ID Tag"); 116340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitIntValue(CIE_ID, 4); 116489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 116589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Version 11663c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("DW_CIE_VERSION"); 116789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1); 116889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 116989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation String 117089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola SmallString<8> Augmentation; 117140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 11723c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Augmentation"); 117340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "z"; 117440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) 117540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "P"; 117640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 117740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "L"; 117840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "R"; 117916d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola if (IsSignalFrame) 118016d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Augmentation += "S"; 118140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitBytes(Augmentation.str(), 0); 118240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 118389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(0, 1); 118489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 118589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Code Alignment Factor 11863c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Code Alignment Factor"); 118789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(1); 118889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 118989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Data Alignment Factor 11903c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Data Alignment Factor"); 119189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitSLEB128IntValue(getDataAlignmentFactor(streamer)); 119289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 119389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Return Address Register 11943c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Return Address Column"); 11950e6a052331f674dd70e28af41f654a7874405eabEvan Cheng streamer.EmitULEB128IntValue(MRI.getDwarfRegNum(MRI.getRARegister(), true)); 119689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 119789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data Length (optional) 11981f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 11991f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola unsigned augmentationLength = 0; 120040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 120140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 120240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 120340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 120440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 120540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, personalityEncoding); 120640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 120740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 120840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 120940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 12101f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola augmentationLength += 1; 12111f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 12123c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("Augmentation Size"); 121340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 121489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 121540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data (optional) 121640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 121740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 12183c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EmitEncodingByte(streamer, personalityEncoding, 12193c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling "Personality Encoding"); 122040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 12213c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("Personality"); 122240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola EmitPersonality(streamer, *personality, personalityEncoding); 122340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 12243c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 122540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 12263c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding"); 12273c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 122840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 1229203576aa0cb9d8bf2d2e4d910ebab4b7a63262aeEvan Cheng EmitEncodingByte(streamer, MOFI->getFDEEncoding(UsingCFI), 12303c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling "FDE Encoding"); 1231bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 123289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 123389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Initial Instructions 123489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 12352d28617de2b0b731c08d1af9e830f31e14ac75b4Evan Cheng const MCAsmInfo &MAI = context.getAsmInfo(); 12362d28617de2b0b731c08d1af9e830f31e14ac75b4Evan Cheng const std::vector<MachineMove> &Moves = MAI.getInitialFrameState(); 1237fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola std::vector<MCCFIInstruction> Instructions; 1238fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 1239fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (int i = 0, n = Moves.size(); i != n; ++i) { 1240b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola MCSymbol *Label = Moves[i].getLabel(); 1241b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Dst = 12420e6a052331f674dd70e28af41f654a7874405eabEvan Cheng TranslateMachineLocation(MRI, Moves[i].getDestination()); 1243b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Src = 12440e6a052331f674dd70e28af41f654a7874405eabEvan Cheng TranslateMachineLocation(MRI, Moves[i].getSource()); 1245b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola MCCFIInstruction Inst(Label, Dst, Src); 1246fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Instructions.push_back(Inst); 1247fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 124889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1249b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, Instructions, NULL); 125089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 125189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 12521be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng streamer.EmitValueToAlignment(IsEH 12531be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng ? 4 : context.getAsmInfo().getPointerSize()); 125489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 125589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(sectionEnd); 125689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return *sectionStart; 125789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 125889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 125925f492e77858dc5a95fcd7180e73aff47925b668Rafael EspindolaMCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer, 126025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 12619f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame) { 1262bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCContext &context = streamer.getContext(); 1263bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeStart = context.CreateTempSymbol(); 1264bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeEnd = context.CreateTempSymbol(); 1265e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCObjectFileInfo *MOFI = context.getObjectFileInfo(); 12662541c41f3e2af94585e14353a91f02facd65e415Bill Wendling bool verboseAsm = streamer.isVerboseAsm(); 126789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 12685fbe5e783ee0c5ae27c17490a752d7e603e84ed2Evan Cheng if (IsEH && frame.Function && !MOFI->isFunctionEHFrameSymbolPrivate()) { 12692541c41f3e2af94585e14353a91f02facd65e415Bill Wendling MCSymbol *EHSym = 12702541c41f3e2af94585e14353a91f02facd65e415Bill Wendling context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh")); 12718bca4106dfc2945723251db10e340183f3e372ddRafael Espindola streamer.EmitEHSymAttributes(frame.Function, EHSym); 1272a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola streamer.EmitLabel(EHSym); 1273a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola } 1274a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola 127589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 127689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0); 12772541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE Length"); 12789266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 127989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 128089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(fdeStart); 1281e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola 128289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE Pointer 1283e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 12840d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola if (IsEH) { 12850d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart, 12860d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola 0); 12872541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE CIE Offset"); 12880d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitAbsValue(offset, 4); 12892241e51406f7bae369d6103cf3464e70f74c4af9Rafael Espindola } else if (!asmInfo.doesDwarfUseRelocationsAcrossSections()) { 1290e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart, 1291e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola cieStart, 0); 1292e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola streamer.EmitAbsValue(offset, 4); 12930d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } else { 12940d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitSymbolValue(&cieStart, 4); 12950d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } 12962541c41f3e2af94585e14353a91f02facd65e415Bill Wendling 1297203576aa0cb9d8bf2d2e4d910ebab4b7a63262aeEvan Cheng unsigned fdeEncoding = MOFI->getFDEEncoding(UsingCFI); 1298abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, fdeEncoding); 129989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 130089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Begin 13019989ef43faf1cd7eb01a6d45063f5040e9c8bb3eRafael Espindola unsigned PCBeginEncoding = IsEH ? fdeEncoding : 13029989ef43faf1cd7eb01a6d45063f5040e9c8bb3eRafael Espindola (unsigned)dwarf::DW_EH_PE_absptr; 130340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned PCBeginSize = getSizeForEncoding(streamer, PCBeginEncoding); 13042541c41f3e2af94585e14353a91f02facd65e415Bill Wendling EmitSymbol(streamer, *frame.Begin, PCBeginEncoding, "FDE initial location"); 130589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 130689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Range 130789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin, 130889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *frame.End, 0); 13092541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE address range"); 13109266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Range, size); 131189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 131240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 131340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data Length 131440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned augmentationLength = 0; 13151f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 131640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 131740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, frame.LsdaEncoding); 13181f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 13192541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("Augmentation size"); 132040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 132189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 132240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data 132340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 13242541c41f3e2af94585e14353a91f02facd65e415Bill Wendling EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding, 13252541c41f3e2af94585e14353a91f02facd65e415Bill Wendling "Language Specific Data Area"); 132640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 13274892dff07e7d99eb37aee868c4f2c91e9c7eba14Rafael Espindola 132889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Call Frame Instructions 132989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1330b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, frame.Instructions, frame.Begin); 13315bba08425374ca36fe5fbc7423ce1a09858e4097Rafael Espindola 133289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 133340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitValueToAlignment(PCBeginSize); 1334dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola 1335dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola return fdeEnd; 133689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 133789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 133819282365147f498a60463d250dbed2f8e1b81861Benjamin Kramernamespace { 133919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer struct CIEKey { 134016d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1, false); } 134116d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0, false); } 134219282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer 134319282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer CIEKey(const MCSymbol* Personality_, unsigned PersonalityEncoding_, 134416d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola unsigned LsdaEncoding_, bool IsSignalFrame_) : 134516d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Personality(Personality_), PersonalityEncoding(PersonalityEncoding_), 134616d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola LsdaEncoding(LsdaEncoding_), IsSignalFrame(IsSignalFrame_) { 134719282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer } 134819282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer const MCSymbol* Personality; 134919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned PersonalityEncoding; 135019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned LsdaEncoding; 135116d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola bool IsSignalFrame; 135219282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer }; 135319282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer} 1354bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 1355bdc3167c086dd4358e24692075db5e7784140843Rafael Espindolanamespace llvm { 1356bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola template <> 1357bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola struct DenseMapInfo<CIEKey> { 1358bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getEmptyKey() { 135919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getEmptyKey(); 1360bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1361bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getTombstoneKey() { 136219282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getTombstoneKey(); 1363bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1364bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static unsigned getHashValue(const CIEKey &Key) { 13657484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer return static_cast<unsigned>(hash_combine(Key.Personality, 13667484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer Key.PersonalityEncoding, 13677484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer Key.LsdaEncoding, 13687484920cf5d95b21fa750229f8ce0d1624c918ecBenjamin Kramer Key.IsSignalFrame)); 1369bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1370bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static bool isEqual(const CIEKey &LHS, 1371bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola const CIEKey &RHS) { 1372bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola return LHS.Personality == RHS.Personality && 1373bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola LHS.PersonalityEncoding == RHS.PersonalityEncoding && 137416d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola LHS.LsdaEncoding == RHS.LsdaEncoding && 137516d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola LHS.IsSignalFrame == RHS.IsSignalFrame; 1376bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1377bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola }; 1378bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola} 1379bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 1380a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendlingvoid MCDwarfFrameEmitter::Emit(MCStreamer &Streamer, 1381a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling bool UsingCFI, 1382a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling bool IsEH) { 1383a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCContext &Context = Streamer.getContext(); 1384e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng MCObjectFileInfo *MOFI = 1385e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const_cast<MCObjectFileInfo*>(Context.getObjectFileInfo()); 13861424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling FrameEmitterImpl Emitter(UsingCFI, IsEH); 1387d8ab8e9707e6170218ce82516d15b36f54b4bc1cBill Wendling ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getFrameInfos(); 13881424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 1389d8ab8e9707e6170218ce82516d15b36f54b4bc1cBill Wendling // Emit the compact unwind info if available. 13907a13b72bbbadaa9274f6a58774970b9b95706330Bill Wendling if (IsEH && MOFI->getCompactUnwindSection()) 13911424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) { 13921424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i); 1393a2ff3e2c3c0d8be862525c91f7b0e153480f4f5eBill Wendling if (Frame.CompactUnwindEncoding) 1394d8ab8e9707e6170218ce82516d15b36f54b4bc1cBill Wendling Emitter.EmitCompactUnwind(Streamer, Frame); 13951424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling } 13961424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling 1397e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng const MCSection &Section = IsEH ? *MOFI->getEHFrameSection() : 1398e76a33b9567d78a5744dc52fcec3a6056d6fb576Evan Cheng *MOFI->getDwarfFrameSection(); 1399a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.SwitchSection(&Section); 1400a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCSymbol *SectionStart = Context.CreateTempSymbol(); 1401a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(SectionStart); 14021424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling Emitter.setSectionStart(SectionStart); 1403a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling 1404a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCSymbol *FDEEnd = NULL; 1405bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola DenseMap<CIEKey, const MCSymbol*> CIEStarts; 1406d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 140740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola const MCSymbol *DummyDebugKey = NULL; 14081424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling for (unsigned i = 0, n = FrameArray.size(); i < n; ++i) { 14091424c3c3e696868775ac5bfc57d27a0ac3bc6c63Bill Wendling const MCDwarfFrameInfo &Frame = FrameArray[i]; 1410a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling CIEKey Key(Frame.Personality, Frame.PersonalityEncoding, 141116d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Frame.LsdaEncoding, Frame.IsSignalFrame); 1412a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey; 1413a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling if (!CIEStart) 1414a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling CIEStart = &Emitter.EmitCIE(Streamer, Frame.Personality, 1415a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Frame.PersonalityEncoding, Frame.Lsda, 141616d7d437e03ce87fdaef7971919302920d54a966Rafael Espindola Frame.IsSignalFrame, 1417a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Frame.LsdaEncoding); 1418e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1419a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling FDEEnd = Emitter.EmitFDE(Streamer, *CIEStart, Frame); 1420e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1421dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola if (i != n - 1) 1422a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(FDEEnd); 1423dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola } 1424d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 14251be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng Streamer.EmitValueToAlignment(Context.getAsmInfo().getPointerSize()); 1426a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling if (FDEEnd) 1427a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(FDEEnd); 142889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 1429245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1430245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EmitAdvanceLoc(MCStreamer &Streamer, 1431245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint64_t AddrDelta) { 1432245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola SmallString<256> Tmp; 1433245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola raw_svector_ostream OS(Tmp); 14344eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola MCDwarfFrameEmitter::EncodeAdvanceLoc(AddrDelta, OS); 1435245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola Streamer.EmitBytes(OS.str(), /*AddrSpace=*/0); 1436245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1437245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1438245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EncodeAdvanceLoc(uint64_t AddrDelta, 14394eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola raw_ostream &OS) { 1440245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola // FIXME: Assumes the code alignment factor is 1. 14413b78cdc57ae25ff021fd67171a7c82d533477a19Rafael Espindola if (AddrDelta == 0) { 14424eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUIntN(6, AddrDelta)) { 1443245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint8_t Opcode = dwarf::DW_CFA_advance_loc | AddrDelta; 1444245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << Opcode; 14454eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<8>(AddrDelta)) { 1446245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc1); 1447245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(AddrDelta); 14484eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<16>(AddrDelta)) { 1449a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 1450245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc2); 1451a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 1452a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 1453245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } else { 1454a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 1455245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola assert(isUInt<32>(AddrDelta)); 1456245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc4); 1457a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 1458a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 1459a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 16) & 0xff); 1460a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 24) & 0xff); 1461a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola 1462245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 1463245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1464