MCDwarf.cpp revision dfe125cc9cfd524575973daa297c9aad10470390
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 10767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola#include "llvm/MC/MCAsmInfo.h" 117cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/MC/MCDwarf.h" 12c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCAssembler.h" 13ad8aaa069cfdb3bdc32b1becc8881f67b5272e14Rafael Espindola#include "llvm/MC/MCStreamer.h" 14c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCSymbol.h" 15c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCExpr.h" 16c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCContext.h" 17c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCObjectWriter.h" 18c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/ADT/SmallString.h" 197cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/Debug.h" 207cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/raw_ostream.h" 21c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/Target/TargetAsmBackend.h" 2289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola#include "llvm/Target/TargetAsmInfo.h" 237cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyusing namespace llvm; 247cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 25c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Given a special op, return the address skip amount (in units of 26c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// DWARF2_LINE_MIN_INSN_LENGTH. 27c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) 28c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 29c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// The maximum address skip amount that can be encoded with a special op. 30c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) 31c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 32c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// First special line opcode - leave room for the standard opcodes. 33c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: If you want to change this, you'll have to update the 34c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// "standard_opcode_lengths" table that is emitted in DwarfFileTable::Emit(). 35c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define DWARF2_LINE_OPCODE_BASE 13 36c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 37c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Minimum line offset in a special line info. opcode. This value 38c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// was chosen to give a reasonable range of values. 39c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define DWARF2_LINE_BASE -5 40c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 41c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Range of line offsets in a special line info. opcode. 42c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby# define DWARF2_LINE_RANGE 14 43c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 44c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Define the architecture-dependent minimum instruction length (in bytes). 45c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This value should be rather too small than too big. 46c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby# define DWARF2_LINE_MIN_INSN_LENGTH 1 47c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 48c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: when DWARF2_LINE_MIN_INSN_LENGTH == 1 which is the current setting, 49c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// this routine is a nop and will be optimized away. 50c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbystatic inline uint64_t ScaleAddrDelta(uint64_t AddrDelta) 51c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby{ 52c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (DWARF2_LINE_MIN_INSN_LENGTH == 1) 53c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta; 54c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta % DWARF2_LINE_MIN_INSN_LENGTH != 0) { 55c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // TODO: report this error, but really only once. 56c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ; 57c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 58c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta / DWARF2_LINE_MIN_INSN_LENGTH; 59c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 60c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 61c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 62c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This is called when an instruction is assembled into the specified section 63c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// and if there is information from the last .loc directive that has yet to have 64c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// a line entry made for it is made. 65c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 66195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCLineEntry::Make(MCStreamer *MCOS, const MCSection *Section) { 67c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!MCOS->getContext().getDwarfLocSeen()) 68c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 69c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 70c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at in the current section for use in the line entry. 71c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LineSym = MCOS->getContext().CreateTempSymbol(); 72c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol to use for the MCLineEntry. 73c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineSym); 74c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 75c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the current .loc info saved in the context. 76c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCDwarfLoc &DwarfLoc = MCOS->getContext().getCurrentDwarfLoc(); 77c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 78c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a (local) line entry with the symbol and the current .loc info. 79c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCLineEntry LineEntry(LineSym, DwarfLoc); 80c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 81c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // clear DwarfLocSeen saying the current .loc info is now used. 823f55c24df9527de345f6cc960944840a7a101c6aKevin Enderby MCOS->getContext().ClearDwarfLocSeen(); 83c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 84c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the MCLineSection for this section, if one does not exist for this 85c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section create it. 8617fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 87c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 8817fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCLineSection *LineSection = MCLineSections.lookup(Section); 89c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!LineSection) { 90c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a new MCLineSection. This will be deleted after the dwarf line 91c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // table is created using it by iterating through the MCLineSections 92c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // DenseMap. 93c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection = new MCLineSection; 94c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Save a pointer to the new LineSection into the MCLineSections DenseMap. 9517fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().addMCLineSection(Section, LineSection); 96c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 97c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 98c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Add the line entry to this section's entries. 99c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection->addLineEntry(LineEntry); 100c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 101c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 102c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 103c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This helper routine returns an expression of End - Start + IntVal . 104c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 1055fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindolastatic inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS, 1065fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &Start, 1075fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &End, 1085fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola int IntVal) { 109c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 110c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res = 1115fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&End, Variant, MCOS.getContext()); 112c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *RHS = 1135fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&Start, Variant, MCOS.getContext()); 114c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res1 = 1155fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext()); 116c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res2 = 1175fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCConstantExpr::Create(IntVal, MCOS.getContext()); 118c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res3 = 1195fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext()); 120c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return Res3; 121c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 122c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 123c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 124c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf line table for the specified section from the entries 125c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// in the LineSection. 126c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 127195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolastatic inline void EmitDwarfLineTable(MCStreamer *MCOS, 128c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCSection *Section, 12989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCLineSection *LineSection) { 130c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned FileNum = 1; 131c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned LastLine = 1; 132c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Column = 0; 133c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; 134c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Isa = 0; 135c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LastLabel = NULL; 136c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 137c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Loop through each MCLineEntry and encode the dwarf line number table. 13817fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (MCLineSection::const_iterator 139c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby it = LineSection->getMCLineEntries()->begin(), 140c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ie = LineSection->getMCLineEntries()->end(); it != ie; ++it) { 141c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 142c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (FileNum != it->getFileNum()) { 143c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby FileNum = it->getFileNum(); 144c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_file, 1); 1453ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(FileNum); 146c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 147c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Column != it->getColumn()) { 148c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Column = it->getColumn(); 149c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_column, 1); 1503ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Column); 151c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 152c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Isa != it->getIsa()) { 153c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Isa = it->getIsa(); 154c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_isa, 1); 1553ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Isa); 156c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 157c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if ((it->getFlags() ^ Flags) & DWARF2_FLAG_IS_STMT) { 158c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Flags = it->getFlags(); 159c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_negate_stmt, 1); 160c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 161c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_BASIC_BLOCK) 162c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_basic_block, 1); 163c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_PROLOGUE_END) 164c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_prologue_end, 1); 165c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_EPILOGUE_BEGIN) 166c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_epilogue_begin, 1); 167c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 16864185cc6090f695c4f97c51cf2adc731f56d1a20Rafael Espindola int64_t LineDelta = static_cast<int64_t>(it->getLine()) - LastLine; 169c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *Label = it->getLabel(); 170c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 171c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // At this point we want to emit/create the sequence to encode the delta in 172c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // line numbers and the increment of the address from the previous Label 173c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and the current Label. 17432a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label); 175c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 176c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LastLine = it->getLine(); 177c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LastLabel = Label; 178c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 179c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 180c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Emit a DW_LNE_end_sequence for the end of the section. 181c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Using the pointer Section create a temporary label at the end of the 182c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section and use that and the LastLabel to compute the address delta 183c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and use INT64_MAX as the line delta which is the signal that this is 184c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // actually a DW_LNE_end_sequence. 185c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 186c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section to be able to create a symbol at its end. 187c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->SwitchSection(Section); 18889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 18989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 190c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at the end of the section. 19189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *SectionEnd = context.CreateTempSymbol(); 192c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol, as we are at the end of the section. 193c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(SectionEnd); 194c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 195c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch back the the dwarf line section. 19689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection()); 197195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindola 19832a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd); 199c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 200c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 201c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 202c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf file and the line tables. 203c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 20489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolavoid MCDwarfFileTable::Emit(MCStreamer *MCOS) { 20589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 206c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section where the table will be emitted into. 20789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection()); 208c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 209c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at the beginning of this section. 21089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineStartSym = context.CreateTempSymbol(); 211c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol, as we are at the start of the section. 212c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineStartSym); 213c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 214c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the section (to be set when we get there). 21589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineEndSym = context.CreateTempSymbol(); 216c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 217c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // The first 4 bytes is the total length of the information for this 218c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // compilation unit (not including these 4 bytes for the length). 2195fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *LineEndSym,4), 2200bbe0b440ee2cef47dcb7b281825eb70341c16ddRafael Espindola 4); 221c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 222c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Next 2 bytes is the Version, which is Dwarf 2. 223c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(2, 2); 224c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 225c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the prologue (to be set when we get there). 22689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *ProEndSym = context.CreateTempSymbol(); // Lprologue_end 227c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 228c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Length of the prologue, is the next 4 bytes. Which is the start of the 229c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section to the end of the prologue. Not including the 4 bytes for the 230c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // total length, the 2 bytes for the version, and these 4 bytes for the 231c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // length of the prologue. 2325fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *ProEndSym, 233c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby (4 + 2 + 4)), 2345d4918dbd116b0b5e561c431b1ea527ee1b9302aRafael Espindola 4, 0); 235c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 236c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Parameters of the state machine, are next. 237c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_MIN_INSN_LENGTH, 1); 238c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_DEFAULT_IS_STMT, 1); 239c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_BASE, 1); 240c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_RANGE, 1); 241c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_OPCODE_BASE, 1); 242c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 243c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Standard opcode lengths 244c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_copy 245c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_pc 246c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_line 247c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_file 248c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_column 249c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_negate_stmt 250c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_basic_block 251c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_const_add_pc 252c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_fixed_advance_pc 253c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_prologue_end 254c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_epilogue_begin 255c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // DW_LNS_set_isa 256c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 257c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the directory and file tables. 258c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 259c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // First the directory table. 260c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<StringRef> &MCDwarfDirs = 26189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola context.getMCDwarfDirs(); 262c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 0; i < MCDwarfDirs.size(); i++) { 263c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfDirs[i], 0); // the DirectoryName 264c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // the null term. of the string 265c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 266c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the directory list 267c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 268c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Second the file table. 269c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<MCDwarfFile *> &MCDwarfFiles = 270c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCDwarfFiles(); 271c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 1; i < MCDwarfFiles.size(); i++) { 272c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfFiles[i]->getName(), 0); // FileName 273c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // the null term. of the string 2743ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola // the Directory num 2753ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(MCDwarfFiles[i]->getDirIndex()); 276c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // last modification timestamp (always 0) 277c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // filesize (always 0) 278c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 279c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the file list 280c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 281c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the prologue, so set the value of the symbol at the 282c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end of the prologue (that was used in a previous expression). 283c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(ProEndSym); 284c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 285c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the line tables. 28617fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 287c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 28817fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const std::vector<const MCSection *> &MCLineSectionOrder = 28917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().getMCLineSectionOrder(); 29017fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (std::vector<const MCSection*>::const_iterator it = 29117fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCLineSectionOrder.begin(), ie = MCLineSectionOrder.end(); it != ie; 29217fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola ++it) { 29317fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCSection *Sec = *it; 29417fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCLineSection *Line = MCLineSections.lookup(Sec); 29589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola EmitDwarfLineTable(MCOS, Sec, Line); 296c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 297c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Now delete the MCLineSections that were created in MCLineEntry::Make() 298c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and used to emit the line table. 29917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola delete Line; 300c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 301c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 302767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola if (MCOS->getContext().getAsmInfo().getLinkerRequiresNonEmptyDwarfLines() 303767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola && MCLineSectionOrder.begin() == MCLineSectionOrder.end()) { 304a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The darwin9 linker has a bug (see PR8715). For for 32-bit architectures 305a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // it requires: 306a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // total_length >= prologue_length + 10 307a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // We are 4 bytes short, since we have total_length = 51 and 308a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // prologue_length = 45 309a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola 310a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The regular end_sequence should be sufficient. 311a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola MCDwarfLineAddr::Emit(MCOS, INT64_MAX, 0); 3125113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel } 3135113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel 314c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the section, so set the value of the symbol at the end 315c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // of this section (that was used in a previous expression). 316c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineEndSym); 317c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 318c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 319c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to write the encoding to an object writer. 320c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Write(MCObjectWriter *OW, int64_t LineDelta, 321c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 322c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 323c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 324c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 325c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OW->WriteBytes(OS.str()); 326c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 327c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 328c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to emit the encoding to a streamer. 329195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCDwarfLineAddr::Emit(MCStreamer *MCOS, int64_t LineDelta, 330c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 331c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 332c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 333c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 334c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(OS.str(), /*AddrSpace=*/0); 335c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 336c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 337c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas. 338c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Encode(int64_t LineDelta, uint64_t AddrDelta, 339c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_ostream &OS) { 340c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t Temp, Opcode; 341c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby bool NeedCopy = false; 342c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 343c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Scale the address delta by the minimum instruction length. 344c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby AddrDelta = ScaleAddrDelta(AddrDelta); 345c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 346c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // A LineDelta of INT64_MAX is a signal that this is actually a 347c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the 348c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end_sequence to emit the matrix entry. 349c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == INT64_MAX) { 350c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta == MAX_SPECIAL_ADDR_DELTA) 351c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 352c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else { 353c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 354c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 355c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 356c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeULEB128(AddrDelta, OSE); 357c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 358c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 359c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_extended_op); 360c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(1); 361c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNE_end_sequence); 362c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 363c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 364c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 365c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the line delta by the base. 366c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = LineDelta - DWARF2_LINE_BASE; 367c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 368c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // If the line increment is out of range of a special opcode, we must encode 369c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // it with DW_LNS_advance_line. 370c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Temp >= DWARF2_LINE_RANGE) { 371c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_line); 372c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 373c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 374c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeSLEB128(LineDelta, OSE); 375c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 376c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 377c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineDelta = 0; 378c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = 0 - DWARF2_LINE_BASE; 379c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby NeedCopy = true; 380c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 381c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 382c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Use DW_LNS_copy instead of a "line +0, addr +0" special opcode. 383c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == 0 && AddrDelta == 0) { 384c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 385c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 386c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 387c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 388c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the opcode by the special opcode base. 389c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp += DWARF2_LINE_OPCODE_BASE; 390c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 391c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Avoid overflow when addr_delta is large. 392c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta < 256 + MAX_SPECIAL_ADDR_DELTA) { 393c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using a special opcode. 394c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + AddrDelta * DWARF2_LINE_RANGE; 395c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 396c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 397c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 398c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 399c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 400c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using DW_LNS_const_add_pc followed by special op. 401c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + (AddrDelta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; 402c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 403c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 404c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 405c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 406c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 407c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 408c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 409c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Otherwise use DW_LNS_advance_pc. 410c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 411c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 412c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 413c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeULEB128(AddrDelta, OSE); 414c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 415c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 416c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (NeedCopy) 417c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 418c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else 419c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Temp); 420c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 421c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 4227cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::print(raw_ostream &OS) const { 4237cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby OS << '"' << getName() << '"'; 4247cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 4257cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 4267cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::dump() const { 4277cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby print(dbgs()); 4287cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 429c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 43089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic int getDataAlignmentFactor(MCStreamer &streamer) { 43189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 43289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 43389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int size = asmInfo.getPointerSize(); 43489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (asmInfo.getStackGrowthDirection() == TargetFrameInfo::StackGrowsUp) 43589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return size; 43689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola else 43789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return -size; 43889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 43989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 44089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola/// EmitFrameMoves - Emit frame instructions to describe the layout of the 44189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola/// frame. 44289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic void EmitFrameMoves(MCStreamer &streamer, 44389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const std::vector<MachineMove> &Moves, 44489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *BaseLabel, bool isEH) { 44589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 44689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 44789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int dataAlignmentFactor = getDataAlignmentFactor(streamer); 44889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 44989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola for (unsigned i = 0, N = Moves.size(); i < N; ++i) { 45089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MachineMove &Move = Moves[i]; 45189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *Label = Move.getLabel(); 45289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Throw out move if the label is invalid. 45389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. 45489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 45589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MachineLocation &Dst = Move.getDestination(); 45689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MachineLocation &Src = Move.getSource(); 45789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 45889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Advance row if new location. 45989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (BaseLabel && Label) { 46089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *ThisSym = Label; 46189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (ThisSym != BaseLabel) { 46289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CFA_advance_loc4, 1); 46389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *BaseLabel, 46489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *ThisSym, 4); 46589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitValue(Length, 4); 46689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola BaseLabel = ThisSym; 46789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 46889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 46989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 47089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // If advancing cfa. 47189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { 47289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola assert(!Src.isReg() && "Machine move not supported yet."); 47389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 47489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.getReg() == MachineLocation::VirtualFP) { 47589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); 47689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 47789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); 47889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(asmInfo.getDwarfRegNum(Src.getReg(), isEH), 47989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 1); 48089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 48189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 48289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(-Src.getOffset(), 1); 48389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola continue; 48489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 48589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 48689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { 48789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola assert(Dst.isReg() && "Machine move not supported yet."); 48889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); 48989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(asmInfo.getDwarfRegNum(Dst.getReg(), isEH)); 49089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola continue; 49189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 49289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 49389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola unsigned Reg = asmInfo.getDwarfRegNum(Src.getReg(), isEH); 49489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int Offset = Dst.getOffset() / dataAlignmentFactor; 49589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 49689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Offset < 0) { 49789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1); 49889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(Reg); 49989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitSLEB128IntValue(Offset); 50089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else if (Reg < 64) { 50189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1); 50289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(Offset, 1); 50389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 50489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1); 50589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(Reg, 1); 50689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(Offset, 1); 50789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 50889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 50989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 51089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 51189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic const MCSymbol &EmitCIE(MCStreamer &streamer) { 51289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 51389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 51489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCSection §ion = *asmInfo.getEHFrameSection(); 51589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.SwitchSection(§ion); 51689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *sectionStart = streamer.getContext().CreateTempSymbol(); 51789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *sectionEnd = streamer.getContext().CreateTempSymbol(); 51889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 51989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 52089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart, 52189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *sectionEnd, 4); 52289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(sectionStart); 52389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitValue(Length, 4); 52489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 52589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE ID 52689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(0, 4); 52789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 52889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Version 52989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1); 53089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 53189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation String 53289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola SmallString<8> Augmentation; 53389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola Augmentation += "zR"; 53489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitBytes(Augmentation.str(), 0); 53589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(0, 1); 53689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 53789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Code Alignment Factor 53889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(1); 53989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 54089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Data Alignment Factor 54189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitSLEB128IntValue(getDataAlignmentFactor(streamer)); 54289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 54389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Return Address Register 54489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(asmInfo.getDwarfRARegNum(true)); 54589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 54689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data Length (optional) 54789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *augmentationStart = streamer.getContext().CreateTempSymbol(); 54889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *augmentationEnd = streamer.getContext().CreateTempSymbol(); 54989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *augmentationLength = MakeStartMinusEndExpr(streamer, 55089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *augmentationStart, 55189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *augmentationEnd, 0); 55289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128Value(augmentationLength); 55389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 55489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data (optional) 55589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(augmentationStart); 55689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4, 1); 55789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(augmentationEnd); 55889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 55989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Initial Instructions 56089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 56189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const std::vector<MachineMove> Moves = asmInfo.getInitialFrameState(); 56289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 56389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola EmitFrameMoves(streamer, Moves, NULL, true); 56489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 56589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 56689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitValueToAlignment(asmInfo.getPointerSize()); 56789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 56889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(sectionEnd); 56989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return *sectionStart; 57089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 57189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 572dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindolastatic MCSymbol *EmitFDE(MCStreamer &streamer, 573dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola const MCSymbol &cieStart, 574dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola const MCDwarfFrameInfo &frame) { 57589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *fdeStart = streamer.getContext().CreateTempSymbol(); 57689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *fdeEnd = streamer.getContext().CreateTempSymbol(); 57789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 57889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 57989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0); 58089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitValue(Length, 4); 58189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 58289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(fdeStart); 58389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE Pointer 58489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart, 58589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 0); 58689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitValue(offset, 4); 58789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 58889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Begin 58989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitPCRelSymbolValue(frame.Begin, 4); 59089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 59189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Range 59289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin, 59389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *frame.End, 0); 59489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitValue(Range, 4); 59589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 59689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data Length 59789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(0); 59889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 59989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data 60089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Call Frame Instructions 60189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 60289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 603dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola streamer.EmitValueToAlignment(4); 604dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola 605dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola return fdeEnd; 60689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 60789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 60889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolavoid MCDwarfFrameEmitter::Emit(MCStreamer &streamer) { 609dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola const MCContext &context = streamer.getContext(); 610dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 61189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCSymbol &cieStart = EmitCIE(streamer); 612dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola MCSymbol *fdeEnd = NULL; 613dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola for (unsigned i = 0, n = streamer.getNumFrameInfos(); i < n; ++i) { 614dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola fdeEnd = EmitFDE(streamer, cieStart, streamer.getFrameInfo(i)); 615dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola if (i != n - 1) 616dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola streamer.EmitLabel(fdeEnd); 617dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola } 618dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola streamer.EmitValueToAlignment(asmInfo.getPointerSize()); 619dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola if (fdeEnd) 620dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola streamer.EmitLabel(fdeEnd); 62189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 622