MCDwarf.cpp revision 9989ef43faf1cd7eb01a6d45063f5040e9c8bb3e
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 10bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola#include "llvm/ADT/FoldingSet.h" 11767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola#include "llvm/MC/MCAsmInfo.h" 127cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/MC/MCDwarf.h" 13c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCAssembler.h" 14ad8aaa069cfdb3bdc32b1becc8881f67b5272e14Rafael Espindola#include "llvm/MC/MCStreamer.h" 15c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCSymbol.h" 16c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCExpr.h" 17c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCContext.h" 18c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCObjectWriter.h" 19c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/ADT/SmallString.h" 20a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola#include "llvm/ADT/Twine.h" 217cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/Debug.h" 22fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola#include "llvm/Support/ErrorHandling.h" 237cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/raw_ostream.h" 24c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/Target/TargetAsmBackend.h" 2589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola#include "llvm/Target/TargetAsmInfo.h" 267cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyusing namespace llvm; 277cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 28c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Given a special op, return the address skip amount (in units of 29c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// DWARF2_LINE_MIN_INSN_LENGTH. 30c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) 31c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 32c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// The maximum address skip amount that can be encoded with a special op. 33c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) 34c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 35c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// First special line opcode - leave room for the standard opcodes. 36c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: If you want to change this, you'll have to update the 37c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// "standard_opcode_lengths" table that is emitted in DwarfFileTable::Emit(). 38c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define DWARF2_LINE_OPCODE_BASE 13 39c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 40c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Minimum line offset in a special line info. opcode. This value 41c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// was chosen to give a reasonable range of values. 42c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define DWARF2_LINE_BASE -5 43c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 44c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Range of line offsets in a special line info. opcode. 45c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby# define DWARF2_LINE_RANGE 14 46c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 47c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Define the architecture-dependent minimum instruction length (in bytes). 48c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This value should be rather too small than too big. 49c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby# define DWARF2_LINE_MIN_INSN_LENGTH 1 50c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 51c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: when DWARF2_LINE_MIN_INSN_LENGTH == 1 which is the current setting, 52c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// this routine is a nop and will be optimized away. 53c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbystatic inline uint64_t ScaleAddrDelta(uint64_t AddrDelta) 54c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby{ 55c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (DWARF2_LINE_MIN_INSN_LENGTH == 1) 56c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta; 57c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta % DWARF2_LINE_MIN_INSN_LENGTH != 0) { 58c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // TODO: report this error, but really only once. 59c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ; 60c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 61c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta / DWARF2_LINE_MIN_INSN_LENGTH; 62c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 63c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 64c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 65c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This is called when an instruction is assembled into the specified section 66c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// and if there is information from the last .loc directive that has yet to have 67c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// a line entry made for it is made. 68c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 69195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCLineEntry::Make(MCStreamer *MCOS, const MCSection *Section) { 70c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!MCOS->getContext().getDwarfLocSeen()) 71c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 72c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 73c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at in the current section for use in the line entry. 74c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LineSym = MCOS->getContext().CreateTempSymbol(); 75c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol to use for the MCLineEntry. 76c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineSym); 77c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 78c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the current .loc info saved in the context. 79c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCDwarfLoc &DwarfLoc = MCOS->getContext().getCurrentDwarfLoc(); 80c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 81c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a (local) line entry with the symbol and the current .loc info. 82c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCLineEntry LineEntry(LineSym, DwarfLoc); 83c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 84c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // clear DwarfLocSeen saying the current .loc info is now used. 853f55c24df9527de345f6cc960944840a7a101c6aKevin Enderby MCOS->getContext().ClearDwarfLocSeen(); 86c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 87c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the MCLineSection for this section, if one does not exist for this 88c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section create it. 8917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 90c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 9117fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCLineSection *LineSection = MCLineSections.lookup(Section); 92c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!LineSection) { 93c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a new MCLineSection. This will be deleted after the dwarf line 94c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // table is created using it by iterating through the MCLineSections 95c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // DenseMap. 96c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection = new MCLineSection; 97c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Save a pointer to the new LineSection into the MCLineSections DenseMap. 9817fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().addMCLineSection(Section, LineSection); 99c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 100c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 101c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Add the line entry to this section's entries. 102c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection->addLineEntry(LineEntry); 103c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 104c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 105c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 106c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This helper routine returns an expression of End - Start + IntVal . 107c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 1085fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindolastatic inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS, 1095fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &Start, 1105fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &End, 1115fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola int IntVal) { 112c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 113c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res = 1145fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&End, Variant, MCOS.getContext()); 115c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *RHS = 1165fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&Start, Variant, MCOS.getContext()); 117c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res1 = 1185fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext()); 119c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res2 = 1205fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCConstantExpr::Create(IntVal, MCOS.getContext()); 121c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res3 = 1225fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext()); 123c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return Res3; 124c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 125c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 126c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 127c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf line table for the specified section from the entries 128c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// in the LineSection. 129c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 130195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolastatic inline void EmitDwarfLineTable(MCStreamer *MCOS, 131c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCSection *Section, 13289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCLineSection *LineSection) { 133c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned FileNum = 1; 134c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned LastLine = 1; 135c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Column = 0; 136c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; 137c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Isa = 0; 138c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LastLabel = NULL; 139c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 140c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Loop through each MCLineEntry and encode the dwarf line number table. 14117fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (MCLineSection::const_iterator 142c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby it = LineSection->getMCLineEntries()->begin(), 143c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ie = LineSection->getMCLineEntries()->end(); it != ie; ++it) { 144c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 145c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (FileNum != it->getFileNum()) { 146c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby FileNum = it->getFileNum(); 147c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_file, 1); 1483ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(FileNum); 149c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 150c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Column != it->getColumn()) { 151c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Column = it->getColumn(); 152c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_column, 1); 1533ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Column); 154c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 155c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Isa != it->getIsa()) { 156c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Isa = it->getIsa(); 157c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_isa, 1); 1583ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Isa); 159c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 160c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if ((it->getFlags() ^ Flags) & DWARF2_FLAG_IS_STMT) { 161c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Flags = it->getFlags(); 162c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_negate_stmt, 1); 163c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 164c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_BASIC_BLOCK) 165c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_basic_block, 1); 166c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_PROLOGUE_END) 167c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_prologue_end, 1); 168c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_EPILOGUE_BEGIN) 169c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_epilogue_begin, 1); 170c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 17164185cc6090f695c4f97c51cf2adc731f56d1a20Rafael Espindola int64_t LineDelta = static_cast<int64_t>(it->getLine()) - LastLine; 172c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *Label = it->getLabel(); 173c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 174c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // At this point we want to emit/create the sequence to encode the delta in 175c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // line numbers and the increment of the address from the previous Label 176c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and the current Label. 17732a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label); 178c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 179c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LastLine = it->getLine(); 180c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LastLabel = Label; 181c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 182c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 183c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Emit a DW_LNE_end_sequence for the end of the section. 184c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Using the pointer Section create a temporary label at the end of the 185c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section and use that and the LastLabel to compute the address delta 186c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and use INT64_MAX as the line delta which is the signal that this is 187c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // actually a DW_LNE_end_sequence. 188c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 189c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section to be able to create a symbol at its end. 190c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->SwitchSection(Section); 19189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 19289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 193c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at the end of the section. 19489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *SectionEnd = context.CreateTempSymbol(); 195c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol, as we are at the end of the section. 196c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(SectionEnd); 197c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 198c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch back the the dwarf line section. 19989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection()); 200195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindola 20132a006e606742b1c5401e49607e33717bb5441f0Rafael Espindola MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd); 202c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 203c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 204c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 205c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf file and the line tables. 206c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 20789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolavoid MCDwarfFileTable::Emit(MCStreamer *MCOS) { 20889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 209c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section where the table will be emitted into. 21089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection()); 211c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 212c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at the beginning of this section. 21389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineStartSym = context.CreateTempSymbol(); 214c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol, as we are at the start of the section. 215c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineStartSym); 216c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 217c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the section (to be set when we get there). 21889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineEndSym = context.CreateTempSymbol(); 219c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 220c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // The first 4 bytes is the total length of the information for this 221c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // compilation unit (not including these 4 bytes for the length). 2225fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *LineEndSym,4), 2230bbe0b440ee2cef47dcb7b281825eb70341c16ddRafael Espindola 4); 224c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 225c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Next 2 bytes is the Version, which is Dwarf 2. 226c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(2, 2); 227c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 228c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the prologue (to be set when we get there). 22989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *ProEndSym = context.CreateTempSymbol(); // Lprologue_end 230c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 231c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Length of the prologue, is the next 4 bytes. Which is the start of the 232c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section to the end of the prologue. Not including the 4 bytes for the 233c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // total length, the 2 bytes for the version, and these 4 bytes for the 234c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // length of the prologue. 2355fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *ProEndSym, 236c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby (4 + 2 + 4)), 2375d4918dbd116b0b5e561c431b1ea527ee1b9302aRafael Espindola 4, 0); 238c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 239c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Parameters of the state machine, are next. 240c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_MIN_INSN_LENGTH, 1); 241c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_DEFAULT_IS_STMT, 1); 242c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_BASE, 1); 243c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_RANGE, 1); 244c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_OPCODE_BASE, 1); 245c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 246c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Standard opcode lengths 247c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_copy 248c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_pc 249c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_line 250c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_file 251c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_column 252c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_negate_stmt 253c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_basic_block 254c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_const_add_pc 255c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_fixed_advance_pc 256c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_prologue_end 257c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_epilogue_begin 258c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // DW_LNS_set_isa 259c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 260c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the directory and file tables. 261c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 262c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // First the directory table. 263c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<StringRef> &MCDwarfDirs = 26489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola context.getMCDwarfDirs(); 265c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 0; i < MCDwarfDirs.size(); i++) { 266c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfDirs[i], 0); // the DirectoryName 267c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // the null term. of the string 268c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 269c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the directory list 270c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 271c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Second the file table. 272c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<MCDwarfFile *> &MCDwarfFiles = 273c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCDwarfFiles(); 274c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 1; i < MCDwarfFiles.size(); i++) { 275c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfFiles[i]->getName(), 0); // FileName 276c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // the null term. of the string 2773ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola // the Directory num 2783ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(MCDwarfFiles[i]->getDirIndex()); 279c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // last modification timestamp (always 0) 280c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // filesize (always 0) 281c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 282c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the file list 283c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 284c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the prologue, so set the value of the symbol at the 285c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end of the prologue (that was used in a previous expression). 286c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(ProEndSym); 287c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 288c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the line tables. 28917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 290c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 29117fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const std::vector<const MCSection *> &MCLineSectionOrder = 29217fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().getMCLineSectionOrder(); 29317fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (std::vector<const MCSection*>::const_iterator it = 29417fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCLineSectionOrder.begin(), ie = MCLineSectionOrder.end(); it != ie; 29517fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola ++it) { 29617fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCSection *Sec = *it; 29717fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCLineSection *Line = MCLineSections.lookup(Sec); 29889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola EmitDwarfLineTable(MCOS, Sec, Line); 299c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 300c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Now delete the MCLineSections that were created in MCLineEntry::Make() 301c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and used to emit the line table. 30217fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola delete Line; 303c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 304c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 305767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola if (MCOS->getContext().getAsmInfo().getLinkerRequiresNonEmptyDwarfLines() 306767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola && MCLineSectionOrder.begin() == MCLineSectionOrder.end()) { 307a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The darwin9 linker has a bug (see PR8715). For for 32-bit architectures 308a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // it requires: 309a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // total_length >= prologue_length + 10 310a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // We are 4 bytes short, since we have total_length = 51 and 311a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // prologue_length = 45 312a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola 313a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The regular end_sequence should be sufficient. 314a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola MCDwarfLineAddr::Emit(MCOS, INT64_MAX, 0); 3155113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel } 3165113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel 317c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the section, so set the value of the symbol at the end 318c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // of this section (that was used in a previous expression). 319c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineEndSym); 320c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 321c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 322c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to write the encoding to an object writer. 323c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Write(MCObjectWriter *OW, int64_t LineDelta, 324c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 325c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 326c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 327c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 328c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OW->WriteBytes(OS.str()); 329c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 330c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 331c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to emit the encoding to a streamer. 332195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCDwarfLineAddr::Emit(MCStreamer *MCOS, int64_t LineDelta, 333c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 334c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 335c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 336c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 337c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(OS.str(), /*AddrSpace=*/0); 338c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 339c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 340c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas. 341c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Encode(int64_t LineDelta, uint64_t AddrDelta, 342c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_ostream &OS) { 343c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t Temp, Opcode; 344c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby bool NeedCopy = false; 345c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 346c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Scale the address delta by the minimum instruction length. 347c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby AddrDelta = ScaleAddrDelta(AddrDelta); 348c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 349c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // A LineDelta of INT64_MAX is a signal that this is actually a 350c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the 351c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end_sequence to emit the matrix entry. 352c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == INT64_MAX) { 353c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta == MAX_SPECIAL_ADDR_DELTA) 354c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 355c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else { 356c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 357c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 358c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 359c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeULEB128(AddrDelta, OSE); 360c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 361c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 362c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_extended_op); 363c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(1); 364c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNE_end_sequence); 365c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 366c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 367c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 368c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the line delta by the base. 369c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = LineDelta - DWARF2_LINE_BASE; 370c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 371c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // If the line increment is out of range of a special opcode, we must encode 372c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // it with DW_LNS_advance_line. 373c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Temp >= DWARF2_LINE_RANGE) { 374c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_line); 375c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 376c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 377c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeSLEB128(LineDelta, OSE); 378c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 379c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 380c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineDelta = 0; 381c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = 0 - DWARF2_LINE_BASE; 382c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby NeedCopy = true; 383c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 384c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 385c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Use DW_LNS_copy instead of a "line +0, addr +0" special opcode. 386c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == 0 && AddrDelta == 0) { 387c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 388c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 389c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 390c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 391c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the opcode by the special opcode base. 392c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp += DWARF2_LINE_OPCODE_BASE; 393c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 394c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Avoid overflow when addr_delta is large. 395c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta < 256 + MAX_SPECIAL_ADDR_DELTA) { 396c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using a special opcode. 397c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + AddrDelta * DWARF2_LINE_RANGE; 398c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 399c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 400c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 401c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 402c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 403c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using DW_LNS_const_add_pc followed by special op. 404c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + (AddrDelta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; 405c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 406c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 407c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 408c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 409c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 410c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 411c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 412c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Otherwise use DW_LNS_advance_pc. 413c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 414c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 415c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 416c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeULEB128(AddrDelta, OSE); 417c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 418c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 419c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (NeedCopy) 420c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 421c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else 422c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Temp); 423c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 424c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 4257cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::print(raw_ostream &OS) const { 4267cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby OS << '"' << getName() << '"'; 4277cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 4287cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 4297cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::dump() const { 4307cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby print(dbgs()); 4317cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 432c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 43389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic int getDataAlignmentFactor(MCStreamer &streamer) { 43489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 43589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 43689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int size = asmInfo.getPointerSize(); 43716c29b5f285f375be53dabaa73e3e91107485fe4Anton Korobeynikov if (asmInfo.getStackGrowthDirection() == TargetFrameLowering::StackGrowsUp) 43889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return size; 43989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola else 44089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return -size; 44189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 44289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 443abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic unsigned getSizeForEncoding(MCStreamer &streamer, 444abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned symbolEncoding) { 44525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCContext &context = streamer.getContext(); 44625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 44725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned format = symbolEncoding & 0x0f; 44825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola switch (format) { 44925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola default: 45025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola assert(0 && "Unknown Encoding"); 45125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_absptr: 45225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_signed: 453abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return asmInfo.getPointerSize(); 45425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata2: 45525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata2: 456abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 2; 45725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata4: 45825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata4: 459abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 4; 46025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata8: 46125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata8: 462abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 8; 46325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola } 464abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola} 465abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola 466abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol, 467abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned symbolEncoding) { 468a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola MCContext &context = streamer.getContext(); 469a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 470a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCExpr *v = asmInfo.getExprForFDESymbol(&symbol, 471debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 472a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola streamer); 473abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 474debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitAbsValue(v, size); 47525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 47625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 477bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindolastatic void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol, 478bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned symbolEncoding) { 479bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola MCContext &context = streamer.getContext(); 480bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 481debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola const MCExpr *v = asmInfo.getExprForPersonalitySymbol(&symbol, 482debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 483debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer); 484bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 485debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitValue(v, size); 486bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola} 487bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola 48825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolastatic const MachineLocation TranslateMachineLocation( 48925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const TargetAsmInfo &AsmInfo, 49025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &Loc) { 49125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ? 49225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation::VirtualFP : 49325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned(AsmInfo.getDwarfRegNum(Loc.getReg(), true)); 49425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &NewLoc = Loc.isReg() ? 49525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset()); 49625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola return NewLoc; 49725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 49825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 49925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolanamespace { 50025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola class FrameEmitterImpl { 50125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola int CFAOffset; 502514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola int CIENum; 5035426a9ee37667660935d80841c5392d78e254318Rafael Espindola bool UsingCFI; 50440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola bool IsEH; 505e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCSymbol *SectionStart; 50625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 50725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola public: 508e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola FrameEmitterImpl(bool usingCFI, bool isEH, const MCSymbol *sectionStart) : 509e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH), 510e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola SectionStart(sectionStart) { 51125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola } 51225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 51325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &EmitCIE(MCStreamer &streamer, 51425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 51525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 51625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 51725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding); 51825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *EmitFDE(MCStreamer &streamer, 51925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 5209f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame); 52125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstructions(MCStreamer &streamer, 52225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 52325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel); 52425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstruction(MCStreamer &Streamer, 52525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr); 52625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola }; 52725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 52825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 52925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, 53025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr) { 531fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola int dataAlignmentFactor = getDataAlignmentFactor(Streamer); 53289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 533fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola switch (Instr.getOperation()) { 53425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case MCCFIInstruction::Move: 53525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case MCCFIInstruction::RelMove: { 536fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MachineLocation &Dst = Instr.getDestination(); 537fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MachineLocation &Src = Instr.getSource(); 5385d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola const bool IsRelative = Instr.getOperation() == MCCFIInstruction::RelMove; 53989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 54089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // If advancing cfa. 54189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { 54289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola assert(!Src.isReg() && "Machine move not supported yet."); 54389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 54489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.getReg() == MachineLocation::VirtualFP) { 545fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); 54689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 547fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); 548b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola Streamer.EmitULEB128IntValue(Src.getReg()); 54989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 55089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 5515d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola if (IsRelative) 5525d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola CFAOffset += Src.getOffset(); 5535d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola else 5545d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola CFAOffset = -Src.getOffset(); 5555d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola 556e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(CFAOffset); 557fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 55889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 55989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 56089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { 56189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola assert(Dst.isReg() && "Machine move not supported yet."); 562fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); 563b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola Streamer.EmitULEB128IntValue(Dst.getReg()); 564fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 56589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 56689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 567b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola unsigned Reg = Src.getReg(); 56825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 56925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola int Offset = Dst.getOffset(); 57025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola if (IsRelative) 57125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset -= CFAOffset; 57225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset = Offset / dataAlignmentFactor; 57389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 57489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Offset < 0) { 575fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1); 576fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitULEB128IntValue(Reg); 577fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitSLEB128IntValue(Offset); 57889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else if (Reg < 64) { 579fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1); 580eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 58189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 582fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1); 583eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 584eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 585fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 586fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 587fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 588fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola case MCCFIInstruction::Remember: 589fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1); 590fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 591fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola case MCCFIInstruction::Restore: 592fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1); 593fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 594c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola case MCCFIInstruction::SameValue: { 595c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola unsigned Reg = Instr.getDestination().getReg(); 596c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1); 597e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 598c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola return; 599c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola } 600fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 601fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola llvm_unreachable("Unhandled case in switch"); 602fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola} 603fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 604fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// EmitFrameMoves - Emit frame instructions to describe the layout of the 605fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// frame. 60625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstructions(MCStreamer &streamer, 60725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 60825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel) { 609fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (unsigned i = 0, N = Instrs.size(); i < N; ++i) { 610fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MCCFIInstruction &Instr = Instrs[i]; 611fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *Label = Instr.getLabel(); 612fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Throw out move if the label is invalid. 613fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. 614fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 615fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Advance row if new location. 616fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (BaseLabel && Label) { 617fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *ThisSym = Label; 618fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (ThisSym != BaseLabel) { 619fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym); 620fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola BaseLabel = ThisSym; 621fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 62289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 623fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 624b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstruction(streamer, Instr); 62589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 62689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 62789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 62825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolaconst MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, 62925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 63025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 63125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 63225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding) { 63389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 63489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 635514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 636514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola MCSymbol *sectionStart; 63712f197b3bc736f740373c084be41654b4d88c0a7Rafael Espindola if (asmInfo.isFunctionEHFrameSymbolPrivate() || !IsEH) 638514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.CreateTempSymbol(); 639514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola else 640514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum)); 641514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 642514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola CIENum++; 643514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 64489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *sectionEnd = streamer.getContext().CreateTempSymbol(); 64589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 64689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 64789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart, 64889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *sectionEnd, 4); 64989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(sectionStart); 6509266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 65189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 65289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE ID 65340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned CIE_ID = IsEH ? 0 : -1; 65440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitIntValue(CIE_ID, 4); 65589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 65689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Version 65789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1); 65889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 65989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation String 66089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola SmallString<8> Augmentation; 66140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 66240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "z"; 66340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) 66440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "P"; 66540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 66640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "L"; 66740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "R"; 66840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitBytes(Augmentation.str(), 0); 66940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 67089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(0, 1); 67189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 67289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Code Alignment Factor 67389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(1); 67489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 67589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Data Alignment Factor 67689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitSLEB128IntValue(getDataAlignmentFactor(streamer)); 67789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 67889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Return Address Register 67989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(asmInfo.getDwarfRARegNum(true)); 68089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 68189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data Length (optional) 6821f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 6831f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola unsigned augmentationLength = 0; 68440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 68540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 68640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 68740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 68840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 68940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, personalityEncoding); 69040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 69140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 69240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 69340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 6941f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola augmentationLength += 1; 6951f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 69640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 69789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 69840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data (optional) 69940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 70040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 70140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitIntValue(personalityEncoding, 1); 70240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 70340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola EmitPersonality(streamer, *personality, personalityEncoding); 70440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 70540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 70640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitIntValue(lsdaEncoding, 1); // LSDA Encoding 70740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 70840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitIntValue(asmInfo.getFDEEncoding(UsingCFI), 1); 709bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 71089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 71189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Initial Instructions 71289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 71389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const std::vector<MachineMove> Moves = asmInfo.getInitialFrameState(); 714fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola std::vector<MCCFIInstruction> Instructions; 715fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 716fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (int i = 0, n = Moves.size(); i != n; ++i) { 717b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola MCSymbol *Label = Moves[i].getLabel(); 718b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Dst = 719b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola TranslateMachineLocation(asmInfo, Moves[i].getDestination()); 720b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Src = 721b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola TranslateMachineLocation(asmInfo, Moves[i].getSource()); 722b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola MCCFIInstruction Inst(Label, Dst, Src); 723fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Instructions.push_back(Inst); 724fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 72589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 726b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, Instructions, NULL); 72789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 72889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 72940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitValueToAlignment(IsEH ? 4 : asmInfo.getPointerSize()); 73089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 73189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(sectionEnd); 73289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return *sectionStart; 73389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 73489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 73525f492e77858dc5a95fcd7180e73aff47925b668Rafael EspindolaMCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer, 73625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 7379f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame) { 738bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCContext &context = streamer.getContext(); 739bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeStart = context.CreateTempSymbol(); 740bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeEnd = context.CreateTempSymbol(); 741e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const TargetAsmInfo &TAsmInfo = context.getTargetAsmInfo(); 74289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 743e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola if (!TAsmInfo.isFunctionEHFrameSymbolPrivate() && IsEH) { 744b47426b4de98aedceff4989d5d6198fc33dc80bbDaniel Dunbar MCSymbol *EHSym = context.GetOrCreateSymbol( 745b47426b4de98aedceff4989d5d6198fc33dc80bbDaniel Dunbar frame.Function->getName() + Twine(".eh")); 7468bca4106dfc2945723251db10e340183f3e372ddRafael Espindola streamer.EmitEHSymAttributes(frame.Function, EHSym); 747a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola streamer.EmitLabel(EHSym); 748a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola } 749a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola 75089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 75189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0); 7529266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 75389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 75489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(fdeStart); 755e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola 75689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE Pointer 757e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 7580d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola if (IsEH) { 7590d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart, 7600d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola 0); 7610d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitAbsValue(offset, 4); 762e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola } else if (!asmInfo.doesDwarfRequireRelocationForSectionOffset()) { 763e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart, 764e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola cieStart, 0); 765e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola streamer.EmitAbsValue(offset, 4); 7660d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } else { 7670d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitSymbolValue(&cieStart, 4); 7680d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } 769e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola unsigned fdeEncoding = TAsmInfo.getFDEEncoding(UsingCFI); 770abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, fdeEncoding); 77189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 77289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Begin 7739989ef43faf1cd7eb01a6d45063f5040e9c8bb3eRafael Espindola unsigned PCBeginEncoding = IsEH ? fdeEncoding : 7749989ef43faf1cd7eb01a6d45063f5040e9c8bb3eRafael Espindola (unsigned)dwarf::DW_EH_PE_absptr; 77540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned PCBeginSize = getSizeForEncoding(streamer, PCBeginEncoding); 77640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola EmitSymbol(streamer, *frame.Begin, PCBeginEncoding); 77789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 77889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Range 77989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin, 78089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *frame.End, 0); 7819266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Range, size); 78289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 78340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 78440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data Length 78540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned augmentationLength = 0; 7861f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 78740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 78840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, frame.LsdaEncoding); 7891f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 79040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 79189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 79240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data 79340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 79440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding); 79540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 7964892dff07e7d99eb37aee868c4f2c91e9c7eba14Rafael Espindola 79789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Call Frame Instructions 79889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 799b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, frame.Instructions, frame.Begin); 8005bba08425374ca36fe5fbc7423ce1a09858e4097Rafael Espindola 80189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 80240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitValueToAlignment(PCBeginSize); 803dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola 804dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola return fdeEnd; 80589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 80689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 80719282365147f498a60463d250dbed2f8e1b81861Benjamin Kramernamespace { 80819282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer struct CIEKey { 80919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1); } 81019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0); } 81119282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer 81219282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer CIEKey(const MCSymbol* Personality_, unsigned PersonalityEncoding_, 81319282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned LsdaEncoding_) : Personality(Personality_), 81419282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer PersonalityEncoding(PersonalityEncoding_), 81519282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer LsdaEncoding(LsdaEncoding_) { 81619282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer } 81719282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer const MCSymbol* Personality; 81819282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned PersonalityEncoding; 81919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned LsdaEncoding; 82019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer }; 82119282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer} 822bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 823bdc3167c086dd4358e24692075db5e7784140843Rafael Espindolanamespace llvm { 824bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola template <> 825bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola struct DenseMapInfo<CIEKey> { 826bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getEmptyKey() { 82719282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getEmptyKey(); 828bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 829bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getTombstoneKey() { 83019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getTombstoneKey(); 831bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 832bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static unsigned getHashValue(const CIEKey &Key) { 833bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola FoldingSetNodeID ID; 834bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola ID.AddPointer(Key.Personality); 835bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola ID.AddInteger(Key.PersonalityEncoding); 836bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola ID.AddInteger(Key.LsdaEncoding); 837bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola return ID.ComputeHash(); 838bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 839bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static bool isEqual(const CIEKey &LHS, 840bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola const CIEKey &RHS) { 841bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola return LHS.Personality == RHS.Personality && 842bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola LHS.PersonalityEncoding == RHS.PersonalityEncoding && 843bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola LHS.LsdaEncoding == RHS.LsdaEncoding; 844bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 845bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola }; 846bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola} 847bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 8485426a9ee37667660935d80841c5392d78e254318Rafael Espindolavoid MCDwarfFrameEmitter::Emit(MCStreamer &streamer, 84940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola bool usingCFI, 85040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola bool isEH) { 851e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola MCContext &context = streamer.getContext(); 852dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola const TargetAsmInfo &asmInfo = context.getTargetAsmInfo(); 85340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola const MCSection §ion = isEH ? 85440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola *asmInfo.getEHFrameSection() : *asmInfo.getDwarfFrameSection(); 855774466a8a5388d334b57053fbbfd22b547b729edRafael Espindola streamer.SwitchSection(§ion); 856e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola MCSymbol *SectionStart = context.CreateTempSymbol(); 857e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola streamer.EmitLabel(SectionStart); 8589099813bd50a05c4b2a495e3cea817f49c1372d8Rafael Espindola 859dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola MCSymbol *fdeEnd = NULL; 860bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola DenseMap<CIEKey, const MCSymbol*> CIEStarts; 861e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola FrameEmitterImpl Emitter(usingCFI, isEH, SectionStart); 862d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 86340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola const MCSymbol *DummyDebugKey = NULL; 864dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola for (unsigned i = 0, n = streamer.getNumFrameInfos(); i < n; ++i) { 865d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola const MCDwarfFrameInfo &frame = streamer.getFrameInfo(i); 866bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola CIEKey key(frame.Personality, frame.PersonalityEncoding, 867bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola frame.LsdaEncoding); 86840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola const MCSymbol *&cieStart = isEH ? CIEStarts[key] : DummyDebugKey; 869d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola if (!cieStart) 87025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola cieStart = &Emitter.EmitCIE(streamer, frame.Personality, 87125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola frame.PersonalityEncoding, frame.Lsda, 87225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola frame.LsdaEncoding); 8739f270dadd429771dded5a8572da8c74513771c15Rafael Espindola fdeEnd = Emitter.EmitFDE(streamer, *cieStart, frame); 874dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola if (i != n - 1) 875dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola streamer.EmitLabel(fdeEnd); 876dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola } 877d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 878dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola streamer.EmitValueToAlignment(asmInfo.getPointerSize()); 879dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola if (fdeEnd) 880dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola streamer.EmitLabel(fdeEnd); 88189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 882245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 883245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EmitAdvanceLoc(MCStreamer &Streamer, 884245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint64_t AddrDelta) { 885245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola SmallString<256> Tmp; 886245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola raw_svector_ostream OS(Tmp); 8874eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola MCDwarfFrameEmitter::EncodeAdvanceLoc(AddrDelta, OS); 888245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola Streamer.EmitBytes(OS.str(), /*AddrSpace=*/0); 889245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 890245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 891245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EncodeAdvanceLoc(uint64_t AddrDelta, 8924eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola raw_ostream &OS) { 893245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola // FIXME: Assumes the code alignment factor is 1. 8943b78cdc57ae25ff021fd67171a7c82d533477a19Rafael Espindola if (AddrDelta == 0) { 8954eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUIntN(6, AddrDelta)) { 896245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint8_t Opcode = dwarf::DW_CFA_advance_loc | AddrDelta; 897245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << Opcode; 8984eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<8>(AddrDelta)) { 899245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc1); 900245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(AddrDelta); 9014eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<16>(AddrDelta)) { 902a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 903245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc2); 904a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 905a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 906245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } else { 907a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 908245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola assert(isUInt<32>(AddrDelta)); 909245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc4); 910a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 911a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 912a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 16) & 0xff); 913a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 24) & 0xff); 914a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola 915245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 916245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 917