MCDwarf.cpp revision e52e3f2c020354c8e0e966b719152b08349d0334
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" 12ad8aaa069cfdb3bdc32b1becc8881f67b5272e14Rafael Espindola#include "llvm/MC/MCStreamer.h" 13c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCSymbol.h" 14c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCExpr.h" 15c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCContext.h" 16c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/MC/MCObjectWriter.h" 177cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/Debug.h" 18fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola#include "llvm/Support/ErrorHandling.h" 197cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby#include "llvm/Support/raw_ostream.h" 2089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola#include "llvm/Target/TargetAsmInfo.h" 212b2dc7c4bee01071410df0e3027117b47ce48cedBill Wendling#include "llvm/ADT/FoldingSet.h" 222b2dc7c4bee01071410df0e3027117b47ce48cedBill Wendling#include "llvm/ADT/SmallString.h" 232b2dc7c4bee01071410df0e3027117b47ce48cedBill Wendling#include "llvm/ADT/StringExtras.h" 242b2dc7c4bee01071410df0e3027117b47ce48cedBill Wendling#include "llvm/ADT/Twine.h" 257cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyusing namespace llvm; 267cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 27c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Given a special op, return the address skip amount (in units of 28c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// DWARF2_LINE_MIN_INSN_LENGTH. 29c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE) 30c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 31c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// The maximum address skip amount that can be encoded with a special op. 32c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255) 33c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 34c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// First special line opcode - leave room for the standard opcodes. 35c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: If you want to change this, you'll have to update the 36c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// "standard_opcode_lengths" table that is emitted in DwarfFileTable::Emit(). 37c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_OPCODE_BASE 13 38c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 39c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Minimum line offset in a special line info. opcode. This value 40c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// was chosen to give a reasonable range of values. 41c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_BASE -5 42c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 43c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Range of line offsets in a special line info. opcode. 44c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_RANGE 14 45c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 46c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Define the architecture-dependent minimum instruction length (in bytes). 47c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This value should be rather too small than too big. 48c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling#define DWARF2_LINE_MIN_INSN_LENGTH 1 49c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 50c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// Note: when DWARF2_LINE_MIN_INSN_LENGTH == 1 which is the current setting, 51c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// this routine is a nop and will be optimized away. 52a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendlingstatic inline uint64_t ScaleAddrDelta(uint64_t AddrDelta) { 53c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (DWARF2_LINE_MIN_INSN_LENGTH == 1) 54c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta; 55c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta % DWARF2_LINE_MIN_INSN_LENGTH != 0) { 56c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // TODO: report this error, but really only once. 57c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ; 58c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 59c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return AddrDelta / DWARF2_LINE_MIN_INSN_LENGTH; 60c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 61c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 62c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 63c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This is called when an instruction is assembled into the specified section 64c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// and if there is information from the last .loc directive that has yet to have 65c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// a line entry made for it is made. 66c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 67195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCLineEntry::Make(MCStreamer *MCOS, const MCSection *Section) { 68c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!MCOS->getContext().getDwarfLocSeen()) 69c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 70c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 71c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at in the current section for use in the line entry. 72c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LineSym = MCOS->getContext().CreateTempSymbol(); 73c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol to use for the MCLineEntry. 74c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineSym); 75c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 76c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the current .loc info saved in the context. 77c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCDwarfLoc &DwarfLoc = MCOS->getContext().getCurrentDwarfLoc(); 78c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 79c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a (local) line entry with the symbol and the current .loc info. 80c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCLineEntry LineEntry(LineSym, DwarfLoc); 81c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 82c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // clear DwarfLocSeen saying the current .loc info is now used. 833f55c24df9527de345f6cc960944840a7a101c6aKevin Enderby MCOS->getContext().ClearDwarfLocSeen(); 84c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 85c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Get the MCLineSection for this section, if one does not exist for this 86c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section create it. 8717fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 88c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 8917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCLineSection *LineSection = MCLineSections.lookup(Section); 90c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (!LineSection) { 91c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a new MCLineSection. This will be deleted after the dwarf line 92c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // table is created using it by iterating through the MCLineSections 93c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // DenseMap. 94c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection = new MCLineSection; 95c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Save a pointer to the new LineSection into the MCLineSections DenseMap. 9617fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().addMCLineSection(Section, LineSection); 97c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 98c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 99c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Add the line entry to this section's entries. 100c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineSection->addLineEntry(LineEntry); 101c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 102c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 103c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 104c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This helper routine returns an expression of End - Start + IntVal . 105c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 1065fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindolastatic inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS, 1075fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &Start, 1085fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola const MCSymbol &End, 1095fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola int IntVal) { 110c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 111c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res = 1125fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&End, Variant, MCOS.getContext()); 113c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *RHS = 1145fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCSymbolRefExpr::Create(&Start, Variant, MCOS.getContext()); 115c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res1 = 1165fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext()); 117c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res2 = 1185fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCConstantExpr::Create(IntVal, MCOS.getContext()); 119c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCExpr *Res3 = 1205fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCBinaryExpr::Create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext()); 121c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return Res3; 122c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 123c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 124c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 125c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf line table for the specified section from the entries 126c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// in the LineSection. 127c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 128195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolastatic inline void EmitDwarfLineTable(MCStreamer *MCOS, 129c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const MCSection *Section, 13089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCLineSection *LineSection) { 131c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned FileNum = 1; 132c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned LastLine = 1; 133c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Column = 0; 134c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; 135c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby unsigned Isa = 0; 136c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *LastLabel = NULL; 137c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 138c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Loop through each MCLineEntry and encode the dwarf line number table. 13917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (MCLineSection::const_iterator 140c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby it = LineSection->getMCLineEntries()->begin(), 141c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby ie = LineSection->getMCLineEntries()->end(); it != ie; ++it) { 142c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 143c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (FileNum != it->getFileNum()) { 144c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby FileNum = it->getFileNum(); 145c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_file, 1); 1463ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(FileNum); 147c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 148c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Column != it->getColumn()) { 149c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Column = it->getColumn(); 150c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_column, 1); 1513ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Column); 152c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 153c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Isa != it->getIsa()) { 154c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Isa = it->getIsa(); 155c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_isa, 1); 1563ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(Isa); 157c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 158c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if ((it->getFlags() ^ Flags) & DWARF2_FLAG_IS_STMT) { 159c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Flags = it->getFlags(); 160c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_negate_stmt, 1); 161c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 162c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_BASIC_BLOCK) 163c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_basic_block, 1); 164c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_PROLOGUE_END) 165c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_prologue_end, 1); 166c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (it->getFlags() & DWARF2_FLAG_EPILOGUE_BEGIN) 167c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(dwarf::DW_LNS_set_epilogue_begin, 1); 168c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 16964185cc6090f695c4f97c51cf2adc731f56d1a20Rafael Espindola int64_t LineDelta = static_cast<int64_t>(it->getLine()) - LastLine; 170c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCSymbol *Label = it->getLabel(); 171c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 172c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // At this point we want to emit/create the sequence to encode the delta in 173c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // line numbers and the increment of the address from the previous Label 174c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and the current Label. 1751be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo(); 176672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label, 177672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng asmInfo.getPointerSize()); 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 2011be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo(); 202672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd, 203672b93a3324cc1da6d374eed4c75c050a9cad7beEvan Cheng asmInfo.getPointerSize()); 204c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 205c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 206c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 207c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// This emits the Dwarf file and the line tables. 208c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby// 20989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolavoid MCDwarfFileTable::Emit(MCStreamer *MCOS) { 21089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = MCOS->getContext(); 211c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Switch to the section where the table will be emitted into. 21289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection()); 213c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 214c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol at the beginning of this section. 21589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineStartSym = context.CreateTempSymbol(); 216c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Set the value of the symbol, as we are at the start of the section. 217c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineStartSym); 218c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 219c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the section (to be set when we get there). 22089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *LineEndSym = context.CreateTempSymbol(); 221c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 222c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // The first 4 bytes is the total length of the information for this 223c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // compilation unit (not including these 4 bytes for the length). 2245fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *LineEndSym,4), 2250bbe0b440ee2cef47dcb7b281825eb70341c16ddRafael Espindola 4); 226c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 227c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Next 2 bytes is the Version, which is Dwarf 2. 228c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(2, 2); 229c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 230c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Create a symbol for the end of the prologue (to be set when we get there). 23189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCSymbol *ProEndSym = context.CreateTempSymbol(); // Lprologue_end 232c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 233c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Length of the prologue, is the next 4 bytes. Which is the start of the 234c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // section to the end of the prologue. Not including the 4 bytes for the 235c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // total length, the 2 bytes for the version, and these 4 bytes for the 236c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // length of the prologue. 2375fad7a99c00980fc30ce16fb51ce09dc435c40adRafael Espindola MCOS->EmitAbsValue(MakeStartMinusEndExpr(*MCOS, *LineStartSym, *ProEndSym, 238c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby (4 + 2 + 4)), 2395d4918dbd116b0b5e561c431b1ea527ee1b9302aRafael Espindola 4, 0); 240c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 241c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Parameters of the state machine, are next. 242c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_MIN_INSN_LENGTH, 1); 243c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_DEFAULT_IS_STMT, 1); 244c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_BASE, 1); 245c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_RANGE, 1); 246c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(DWARF2_LINE_OPCODE_BASE, 1); 247c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 248c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Standard opcode lengths 249c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_copy 250c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_pc 251c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_advance_line 252c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_file 253c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_set_column 254c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_negate_stmt 255c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_basic_block 256c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_const_add_pc 257c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // length of DW_LNS_fixed_advance_pc 258c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_prologue_end 259c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // length of DW_LNS_set_epilogue_begin 260c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(1, 1); // DW_LNS_set_isa 261c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 262c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the directory and file tables. 263c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 264c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // First the directory table. 265c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<StringRef> &MCDwarfDirs = 26689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola context.getMCDwarfDirs(); 267c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 0; i < MCDwarfDirs.size(); i++) { 268c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfDirs[i], 0); // the DirectoryName 269c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // the null term. of the string 270c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 271c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the directory list 272c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 273c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Second the file table. 274c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby const std::vector<MCDwarfFile *> &MCDwarfFiles = 275c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCDwarfFiles(); 276c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby for (unsigned i = 1; i < MCDwarfFiles.size(); i++) { 277c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(MCDwarfFiles[i]->getName(), 0); // FileName 278c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(StringRef("\0", 1), 0); // the null term. of the string 2793ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola // the Directory num 2803ff57094a7d176a759ddb1e1668489d89064f56cRafael Espindola MCOS->EmitULEB128IntValue(MCDwarfFiles[i]->getDirIndex()); 281c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // last modification timestamp (always 0) 282c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // filesize (always 0) 283c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 284c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitIntValue(0, 1); // Terminate the file list 285c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 286c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the prologue, so set the value of the symbol at the 287c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end of the prologue (that was used in a previous expression). 288c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(ProEndSym); 289c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 290c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Put out the line tables. 29117fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const DenseMap<const MCSection *, MCLineSection *> &MCLineSections = 292c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->getContext().getMCLineSections(); 29317fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const std::vector<const MCSection *> &MCLineSectionOrder = 29417fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola MCOS->getContext().getMCLineSectionOrder(); 29517fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola for (std::vector<const MCSection*>::const_iterator it = 296c3882164cbf794dbe21816a2946a31bc9e02a419Bill Wendling MCLineSectionOrder.begin(), ie = MCLineSectionOrder.end(); it != ie; 29717fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola ++it) { 29817fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCSection *Sec = *it; 29917fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola const MCLineSection *Line = MCLineSections.lookup(Sec); 30089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola EmitDwarfLineTable(MCOS, Sec, Line); 301c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 302c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Now delete the MCLineSections that were created in MCLineEntry::Make() 303c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // and used to emit the line table. 30417fd7bda5ac08f873c063c64e1456f8960a0c765Rafael Espindola delete Line; 305c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 306c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 307767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola if (MCOS->getContext().getAsmInfo().getLinkerRequiresNonEmptyDwarfLines() 308767b1be3900bdc693aa0ad3e554ba034845f67f7Rafael Espindola && MCLineSectionOrder.begin() == MCLineSectionOrder.end()) { 309a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The darwin9 linker has a bug (see PR8715). For for 32-bit architectures 310a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // it requires: 311a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // total_length >= prologue_length + 10 312a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // We are 4 bytes short, since we have total_length = 51 and 313a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // prologue_length = 45 314a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola 315a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola // The regular end_sequence should be sufficient. 316a8de83c68aaa03cafa0e3618fb8bf030b48f6540Rafael Espindola MCDwarfLineAddr::Emit(MCOS, INT64_MAX, 0); 3175113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel } 3185113cdbfff7df4c7a79a92e5aa971126254202c6Devang Patel 319c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // This is the end of the section, so set the value of the symbol at the end 320c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // of this section (that was used in a previous expression). 321c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitLabel(LineEndSym); 322c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 323c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 324c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to write the encoding to an object writer. 325c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Write(MCObjectWriter *OW, int64_t LineDelta, 326c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 327c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 328c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 329c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 330c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OW->WriteBytes(OS.str()); 331c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 332c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 333c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to emit the encoding to a streamer. 334195a0ce484cd12a5adae9184188f6d0fb52b84c0Rafael Espindolavoid MCDwarfLineAddr::Emit(MCStreamer *MCOS, int64_t LineDelta, 335c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t AddrDelta) { 336c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<256> Tmp; 337c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OS(Tmp); 338c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCDwarfLineAddr::Encode(LineDelta, AddrDelta, OS); 339c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCOS->EmitBytes(OS.str(), /*AddrSpace=*/0); 340c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 341c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 342c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby/// Utility function to encode a Dwarf pair of LineDelta and AddrDeltas. 343c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCDwarfLineAddr::Encode(int64_t LineDelta, uint64_t AddrDelta, 344c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_ostream &OS) { 345c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby uint64_t Temp, Opcode; 346c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby bool NeedCopy = false; 347c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 348c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Scale the address delta by the minimum instruction length. 349c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby AddrDelta = ScaleAddrDelta(AddrDelta); 350c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 351c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // A LineDelta of INT64_MAX is a signal that this is actually a 352c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the 353c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // end_sequence to emit the matrix entry. 354c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == INT64_MAX) { 355c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta == MAX_SPECIAL_ADDR_DELTA) 356c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 357c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else { 358c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 359dcf0e0c44b0bf0634b2f833369b840c18ac8a5f0Benjamin Kramer MCObjectWriter::EncodeULEB128(AddrDelta, OS); 360c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 361c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_extended_op); 362c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(1); 363c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNE_end_sequence); 364c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 365c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 366c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 367c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the line delta by the base. 368c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = LineDelta - DWARF2_LINE_BASE; 369c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 370c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // If the line increment is out of range of a special opcode, we must encode 371c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // it with DW_LNS_advance_line. 372c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Temp >= DWARF2_LINE_RANGE) { 373c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_line); 374c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 375c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 376c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeSLEB128(LineDelta, OSE); 377c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 378c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 379c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby LineDelta = 0; 380c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp = 0 - DWARF2_LINE_BASE; 381c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby NeedCopy = true; 382c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 383c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 384c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Use DW_LNS_copy instead of a "line +0, addr +0" special opcode. 385c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (LineDelta == 0 && AddrDelta == 0) { 386c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 387c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 388c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 389c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 390c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Bias the opcode by the special opcode base. 391c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Temp += DWARF2_LINE_OPCODE_BASE; 392c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 393c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Avoid overflow when addr_delta is large. 394c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (AddrDelta < 256 + MAX_SPECIAL_ADDR_DELTA) { 395c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using a special opcode. 396c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + AddrDelta * DWARF2_LINE_RANGE; 397c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 398c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 399c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 400c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 401c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 402c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Try using DW_LNS_const_add_pc followed by special op. 403c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby Opcode = Temp + (AddrDelta - MAX_SPECIAL_ADDR_DELTA) * DWARF2_LINE_RANGE; 404c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (Opcode <= 255) { 405c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_const_add_pc); 406c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Opcode); 407c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby return; 408c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 409c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby } 410c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 411c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby // Otherwise use DW_LNS_advance_pc. 412c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_advance_pc); 413c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby SmallString<32> Tmp; 414c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby raw_svector_ostream OSE(Tmp); 415c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby MCObjectWriter::EncodeULEB128(AddrDelta, OSE); 416c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << OSE.str(); 417c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 418c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby if (NeedCopy) 419c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(dwarf::DW_LNS_copy); 420c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby else 421c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby OS << char(Temp); 422c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby} 423c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 4247cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::print(raw_ostream &OS) const { 4257cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby OS << '"' << getName() << '"'; 4267cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 4277cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby 4287cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderbyvoid MCDwarfFile::dump() const { 4297cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby print(dbgs()); 4307cbf73a73f296167b6e978dbd919ed249e88eeb5Kevin Enderby} 431c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby 43289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindolastatic int getDataAlignmentFactor(MCStreamer &streamer) { 43389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 4341be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCAsmInfo &asmInfo = context.getAsmInfo(); 43589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola int size = asmInfo.getPointerSize(); 4361be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng if (asmInfo.isStackGrowthDirectionUp()) 43789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return size; 4381be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng else 4391be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng return -size; 44089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 44189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 442abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic unsigned getSizeForEncoding(MCStreamer &streamer, 443abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned symbolEncoding) { 44425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCContext &context = streamer.getContext(); 44525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned format = symbolEncoding & 0x0f; 44625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola switch (format) { 44725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola default: 44825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola assert(0 && "Unknown Encoding"); 44925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_absptr: 45025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_signed: 4511be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng return context.getAsmInfo().getPointerSize(); 45225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata2: 45325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata2: 454abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 2; 45525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata4: 45625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata4: 457abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 4; 45825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_udata8: 45925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case dwarf::DW_EH_PE_sdata8: 460abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola return 8; 46125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola } 462abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola} 463abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola 464abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindolastatic void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol, 4652541c41f3e2af94585e14353a91f02facd65e415Bill Wendling unsigned symbolEncoding, const char *comment = 0) { 466a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola MCContext &context = streamer.getContext(); 467a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 468a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola const MCExpr *v = asmInfo.getExprForFDESymbol(&symbol, 469debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 470a0057ca13f06b8de08483c3e3a143a7236c67097Rafael Espindola streamer); 471abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 4722541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (streamer.isVerboseAsm() && comment) streamer.AddComment(comment); 473debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitAbsValue(v, size); 47425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 47525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 476bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindolastatic void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol, 477bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned symbolEncoding) { 478bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola MCContext &context = streamer.getContext(); 479bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 480debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola const MCExpr *v = asmInfo.getExprForPersonalitySymbol(&symbol, 481debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola symbolEncoding, 482debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer); 483bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola unsigned size = getSizeForEncoding(streamer, symbolEncoding); 484debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2beRafael Espindola streamer.EmitValue(v, size); 485bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola} 486bfa27cc5d72e061a96efbb461864d40bc8089ec2Rafael Espindola 48725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolastatic const MachineLocation TranslateMachineLocation( 4880e6a052331f674dd70e28af41f654a7874405eabEvan Cheng const MCRegisterInfo &MRI, 48925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &Loc) { 49025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ? 49125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation::VirtualFP : 4920e6a052331f674dd70e28af41f654a7874405eabEvan Cheng unsigned(MRI.getDwarfRegNum(Loc.getReg(), true)); 49325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MachineLocation &NewLoc = Loc.isReg() ? 49425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset()); 49525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola return NewLoc; 49625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 49725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 49825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolanamespace { 49925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola class FrameEmitterImpl { 50025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola int CFAOffset; 501514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola int CIENum; 5025426a9ee37667660935d80841c5392d78e254318Rafael Espindola bool UsingCFI; 50340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola bool IsEH; 504e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCSymbol *SectionStart; 50525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola public: 506e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola FrameEmitterImpl(bool usingCFI, bool isEH, const MCSymbol *sectionStart) : 507e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH), 508e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola SectionStart(sectionStart) { 50925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola } 51025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 511e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// EmitCompactUnwind - Emit the unwind information in a compact way. If 512e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// we're successful, return 'true'. Otherwise, return 'false' and it will 513e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling /// emit the normal CIE and FDE. 514e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling bool EmitCompactUnwind(MCStreamer &streamer, 515e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCDwarfFrameInfo &frame); 516e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 51725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &EmitCIE(MCStreamer &streamer, 51825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 51925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 52025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 52125f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding); 52225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *EmitFDE(MCStreamer &streamer, 52325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 5249f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame); 52525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstructions(MCStreamer &streamer, 52625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 52725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel); 52825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola void EmitCFIInstruction(MCStreamer &Streamer, 52925f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr); 53025f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola }; 5313c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 5323c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling} // end anonymous namespace 5333c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 5343c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendlingstatic void EmitEncodingByte(MCStreamer &Streamer, unsigned Encoding, 5353c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling StringRef Prefix) { 5363c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (Streamer.isVerboseAsm()) { 5373c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling const char *EncStr = 0; 5383c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling switch (Encoding) { 5393c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling default: EncStr = "<unknown encoding>"; 5403c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_absptr: EncStr = "absptr"; 5413c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_omit: EncStr = "omit"; 5423c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_pcrel: EncStr = "pcrel"; 5433c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_udata4: EncStr = "udata4"; 5443c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_udata8: EncStr = "udata8"; 5453c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_sdata4: EncStr = "sdata4"; 5463c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_sdata8: EncStr = "sdata8"; 5473c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata4: EncStr = "pcrel udata4"; 5483c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata4: EncStr = "pcrel sdata4"; 5493c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata8: EncStr = "pcrel udata8"; 5503c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8: EncStr = "pcrel sdata8"; 5513c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4: 5523c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel udata4"; 5533c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4: 5543c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel sdata4"; 5553c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8: 5563c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel udata8"; 5573c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8: 5583c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EncStr = "indirect pcrel sdata8"; 5593c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling } 5603c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 5613c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.AddComment(Twine(Prefix) + " = " + EncStr); 5623c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling } 5633c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 5643c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.EmitIntValue(Encoding, 1); 56525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola} 56625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola 56725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer, 56825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCCFIInstruction &Instr) { 569fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola int dataAlignmentFactor = getDataAlignmentFactor(Streamer); 570efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling bool VerboseAsm = Streamer.isVerboseAsm(); 57189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 572fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola switch (Instr.getOperation()) { 57325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case MCCFIInstruction::Move: 57425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola case MCCFIInstruction::RelMove: { 575fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MachineLocation &Dst = Instr.getDestination(); 576fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MachineLocation &Src = Instr.getSource(); 5775d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola const bool IsRelative = Instr.getOperation() == MCCFIInstruction::RelMove; 57889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 57989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // If advancing cfa. 58089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { 58189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.getReg() == MachineLocation::VirtualFP) { 582efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_offset"); 583fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1); 58489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 585efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa"); 586fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1); 587efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + 588efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling Twine(Src.getReg())); 589b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola Streamer.EmitULEB128IntValue(Src.getReg()); 59089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 59189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 5925d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola if (IsRelative) 5935d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola CFAOffset += Src.getOffset(); 5945d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola else 5955d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola CFAOffset = -Src.getOffset(); 5965d7dcd3335234d2a2bc16dc69f86fbb5dcaa8962Rafael Espindola 597efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset " + Twine(CFAOffset))); 598e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(CFAOffset); 599fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 60089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 60189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 60289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { 60389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola assert(Dst.isReg() && "Machine move not supported yet."); 604efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_register"); 605fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1); 606efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Dst.getReg())); 607b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola Streamer.EmitULEB128IntValue(Dst.getReg()); 608fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 60989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 61089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 611b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola unsigned Reg = Src.getReg(); 61225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola int Offset = Dst.getOffset(); 61325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola if (IsRelative) 61425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset -= CFAOffset; 61525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola Offset = Offset / dataAlignmentFactor; 61689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 61789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola if (Offset < 0) { 618efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended_sf"); 619fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1); 620efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 621fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitULEB128IntValue(Reg); 622efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 623fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitSLEB128IntValue(Offset); 62489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else if (Reg < 64) { 625e08d4335ad29d74008222b4d7ac91c153ed66becBill Wendling if (VerboseAsm) Streamer.AddComment(Twine("DW_CFA_offset + Reg(") + 626e08d4335ad29d74008222b4d7ac91c153ed66becBill Wendling Twine(Reg) + ")"); 627fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1); 628efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 629eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 63089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } else { 631efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended"); 632fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1); 633efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 634eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 635efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset)); 636eccbad78e0854743e358841b64f9e0f5eba82861Rafael Espindola Streamer.EmitULEB128IntValue(Offset); 637fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 638fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 639fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 640fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola case MCCFIInstruction::Remember: 641efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_remember_state"); 642fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1); 643fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 644fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola case MCCFIInstruction::Restore: 645efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_restore_state"); 646fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1); 647fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola return; 648c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola case MCCFIInstruction::SameValue: { 649c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola unsigned Reg = Instr.getDestination().getReg(); 650efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment("DW_CFA_same_value"); 651c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1); 652efd24ddbffc1e69fa88089de036d1873c950dfb5Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg)); 653e8cfbd843d737e1f95c3032c7670c2be3838a6f6Rafael Espindola Streamer.EmitULEB128IntValue(Reg); 654c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola return; 655c57543964d1382d3d3a5005f415b6c0f49671b3aRafael Espindola } 656fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 657fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola llvm_unreachable("Unhandled case in switch"); 658fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola} 659fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 660fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// EmitFrameMoves - Emit frame instructions to describe the layout of the 661fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola/// frame. 66225f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolavoid FrameEmitterImpl::EmitCFIInstructions(MCStreamer &streamer, 66325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const std::vector<MCCFIInstruction> &Instrs, 66425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola MCSymbol *BaseLabel) { 665fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (unsigned i = 0, N = Instrs.size(); i < N; ++i) { 666fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola const MCCFIInstruction &Instr = Instrs[i]; 667fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *Label = Instr.getLabel(); 668fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Throw out move if the label is invalid. 669fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. 670fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 671fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola // Advance row if new location. 672fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (BaseLabel && Label) { 673fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola MCSymbol *ThisSym = Label; 674fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola if (ThisSym != BaseLabel) { 675d221cd676b44d8118b1db152ecc2168538479626Bill Wendling if (streamer.isVerboseAsm()) streamer.AddComment("DW_CFA_advance_loc4"); 676fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym); 677fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola BaseLabel = ThisSym; 678fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 67989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 680fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 681b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstruction(streamer, Instr); 68289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola } 68389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 68489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 685e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// EmitCompactUnwind - Emit the unwind information in a compact way. If we're 686e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// successful, return 'true'. Otherwise, return 'false' and it will emit the 687e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling/// normal CIE and FDE. 688e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendlingbool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer, 689e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCDwarfFrameInfo &Frame) { 690e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling MCContext &Context = Streamer.getContext(); 691e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const TargetAsmInfo &TAI = Context.getTargetAsmInfo(); 6923c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling bool VerboseAsm = Streamer.isVerboseAsm(); 693e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 694e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // range-start range-length compact-unwind-enc personality-func lsda 695e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _foo LfooEnd-_foo 0x00000023 0 0 696e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // _bar LbarEnd-_bar 0x00000025 __gxx_personality except_tab1 697e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 698e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .section __LD,__compact_unwind,regular,debug 699e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 700e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _foo 701e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _foo 702e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L1,LfooEnd-_foo 703e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L1 704e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01010001 705e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 706e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad 0 707e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // 708e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // # compact unwind for _bar 709e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad _bar 710e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .set L2,LbarEnd-_bar 711e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long L2 712e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .long 0x01020011 713e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad __gxx_personality 714e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // .quad except_tab1 715e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 716e52e3f2c020354c8e0e966b719152b08349d0334Bill Wendling uint32_t Encoding = Frame.CompactUnwindEncoding; 7176a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling if (!Encoding) return false; 7186a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling 7194bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling // The encoding needs to know we have an LSDA. 7204bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling if (Frame.Lsda) 7214bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Encoding |= 0x40000000; 7224bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling 7233c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling Streamer.SwitchSection(TAI.getCompactUnwindSection()); 7243c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 725e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Start 7269056e9032001a2d47057cecec5e39895cbc31799Bill Wendling unsigned FDEEncoding = TAI.getFDEEncoding(UsingCFI); 7279056e9032001a2d47057cecec5e39895cbc31799Bill Wendling unsigned Size = getSizeForEncoding(Streamer, FDEEncoding); 7283c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Range Start"); 7299056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Function, Size); 730e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 731e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling // Range Length 732e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling const MCExpr *Range = MakeStartMinusEndExpr(Streamer, *Frame.Begin, 733e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling *Frame.End, 0); 7343c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Range Length"); 7359287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Streamer.EmitAbsValue(Range, 4); 7369287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 7379287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling // Compact Encoding 7389287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_udata4); 7396a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling if (VerboseAsm) Streamer.AddComment(Twine("Compact Unwind Encoding: 0x") + 7406a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling Twine(llvm::utohexstr(Encoding))); 7419287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling Streamer.EmitIntValue(Encoding, Size); 7429287a6eef336585628a55e1f33e1e3ea9d7f81cfBill Wendling 743e52e3f2c020354c8e0e966b719152b08349d0334Bill Wendling 7449056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // Personality Function 7454bb5b037126ea35f35d5a490b03ccffa8677fa5eBill Wendling Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr); 7463c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("Personality Function"); 7474498d39680abe3970dc84dca973aff46d0f9039bBill Wendling if (Frame.Personality) 7489056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Personality, Size); 7494498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 7504498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No personality fn 7519056e9032001a2d47057cecec5e39895cbc31799Bill Wendling 7529056e9032001a2d47057cecec5e39895cbc31799Bill Wendling // LSDA 7534498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Size = getSizeForEncoding(Streamer, Frame.LsdaEncoding); 7543c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (VerboseAsm) Streamer.AddComment("LSDA"); 7554498d39680abe3970dc84dca973aff46d0f9039bBill Wendling if (Frame.Lsda) 7569056e9032001a2d47057cecec5e39895cbc31799Bill Wendling Streamer.EmitSymbolValue(Frame.Lsda, Size); 7574498d39680abe3970dc84dca973aff46d0f9039bBill Wendling else 7584498d39680abe3970dc84dca973aff46d0f9039bBill Wendling Streamer.EmitIntValue(0, Size); // No LSDA 7599056e9032001a2d47057cecec5e39895cbc31799Bill Wendling 760e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling return true; 761e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling} 762e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 76325f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindolaconst MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer, 76425f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *personality, 76525f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned personalityEncoding, 76625f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol *lsda, 76725f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola unsigned lsdaEncoding) { 76889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola MCContext &context = streamer.getContext(); 7690e6a052331f674dd70e28af41f654a7874405eabEvan Cheng const MCRegisterInfo &MRI = context.getRegisterInfo(); 7701be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const TargetAsmInfo &TAI = context.getTargetAsmInfo(); 7713c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling bool verboseAsm = streamer.isVerboseAsm(); 772514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 773514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola MCSymbol *sectionStart; 7741be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng if (TAI.isFunctionEHFrameSymbolPrivate() || !IsEH) 775514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.CreateTempSymbol(); 776514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola else 777514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum)); 778514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 7793c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling streamer.EmitLabel(sectionStart); 780514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola CIENum++; 781514cecc72b23bb75108844285ab8f3616a08bac5Rafael Espindola 7826a6b8c3e96b9e1ca7092eafd0cfb219cbbfbdfc4Bill Wendling MCSymbol *sectionEnd = context.CreateTempSymbol(); 78389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 78489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 78589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart, 78689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *sectionEnd, 4); 7873c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Length"); 7889266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 78989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 79089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE ID 79140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned CIE_ID = IsEH ? 0 : -1; 7923c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE ID Tag"); 79340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitIntValue(CIE_ID, 4); 79489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 79589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Version 7963c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("DW_CIE_VERSION"); 79789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1); 79889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 79989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation String 80089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola SmallString<8> Augmentation; 80140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 8023c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Augmentation"); 80340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "z"; 80440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) 80540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "P"; 80640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 80740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "L"; 80840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola Augmentation += "R"; 80940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitBytes(Augmentation.str(), 0); 81040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 81189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitIntValue(0, 1); 81289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 81389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Code Alignment Factor 8143c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Code Alignment Factor"); 81589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitULEB128IntValue(1); 81689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 81789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Data Alignment Factor 8183c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Data Alignment Factor"); 81989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitSLEB128IntValue(getDataAlignmentFactor(streamer)); 82089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 82189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Return Address Register 8223c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("CIE Return Address Column"); 8230e6a052331f674dd70e28af41f654a7874405eabEvan Cheng streamer.EmitULEB128IntValue(MRI.getDwarfRegNum(MRI.getRARegister(), true)); 82489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 82589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Augmentation Data Length (optional) 8261f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 8271f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola unsigned augmentationLength = 0; 82840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 82940a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 83040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 83140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 83240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 83340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, personalityEncoding); 83440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 83540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 83640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += 1; 83740a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 8381f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola augmentationLength += 1; 8391f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 8403c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("Augmentation Size"); 84140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 84289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 84340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data (optional) 84440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (personality) { 84540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality Encoding 8463c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EmitEncodingByte(streamer, personalityEncoding, 8473c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling "Personality Encoding"); 84840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Personality 8493c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling if (verboseAsm) streamer.AddComment("Personality"); 85040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola EmitPersonality(streamer, *personality, personalityEncoding); 85140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 8523c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 85340a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (lsda) 8543c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding"); 8553c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling 85640a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Encoding of the FDE pointers 8571be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng EmitEncodingByte(streamer, TAI.getFDEEncoding(UsingCFI), 8583c163cfa60f9f196cd6a5a04e07baec3947fee0bBill Wendling "FDE Encoding"); 859bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 86089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 86189b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Initial Instructions 86289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 8632d28617de2b0b731c08d1af9e830f31e14ac75b4Evan Cheng const MCAsmInfo &MAI = context.getAsmInfo(); 8642d28617de2b0b731c08d1af9e830f31e14ac75b4Evan Cheng const std::vector<MachineMove> &Moves = MAI.getInitialFrameState(); 865fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola std::vector<MCCFIInstruction> Instructions; 866fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola 867fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola for (int i = 0, n = Moves.size(); i != n; ++i) { 868b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola MCSymbol *Label = Moves[i].getLabel(); 869b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Dst = 8700e6a052331f674dd70e28af41f654a7874405eabEvan Cheng TranslateMachineLocation(MRI, Moves[i].getDestination()); 871b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola const MachineLocation &Src = 8720e6a052331f674dd70e28af41f654a7874405eabEvan Cheng TranslateMachineLocation(MRI, Moves[i].getSource()); 873b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola MCCFIInstruction Inst(Label, Dst, Src); 874fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola Instructions.push_back(Inst); 875fe024d0a624404ada11fb330e7360abc5f88742eRafael Espindola } 87689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 877b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, Instructions, NULL); 87889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 87989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 8801be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng streamer.EmitValueToAlignment(IsEH 8811be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng ? 4 : context.getAsmInfo().getPointerSize()); 88289b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 88389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(sectionEnd); 88489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola return *sectionStart; 88589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 88689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 88725f492e77858dc5a95fcd7180e73aff47925b668Rafael EspindolaMCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer, 88825f492e77858dc5a95fcd7180e73aff47925b668Rafael Espindola const MCSymbol &cieStart, 8899f270dadd429771dded5a8572da8c74513771c15Rafael Espindola const MCDwarfFrameInfo &frame) { 890bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCContext &context = streamer.getContext(); 891bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeStart = context.CreateTempSymbol(); 892bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola MCSymbol *fdeEnd = context.CreateTempSymbol(); 8931be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const TargetAsmInfo &TAI = context.getTargetAsmInfo(); 8942541c41f3e2af94585e14353a91f02facd65e415Bill Wendling bool verboseAsm = streamer.isVerboseAsm(); 89589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 8961be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng if (!TAI.isFunctionEHFrameSymbolPrivate() && IsEH) { 8972541c41f3e2af94585e14353a91f02facd65e415Bill Wendling MCSymbol *EHSym = 8982541c41f3e2af94585e14353a91f02facd65e415Bill Wendling context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh")); 8998bca4106dfc2945723251db10e340183f3e372ddRafael Espindola streamer.EmitEHSymAttributes(frame.Function, EHSym); 900a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola streamer.EmitLabel(EHSym); 901a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola } 902a8cfb87fa2176fae2d62785a0dd606e4143cefaeRafael Espindola 90389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Length 90489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0); 9052541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE Length"); 9069266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Length, 4); 90789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 90889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola streamer.EmitLabel(fdeStart); 909e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola 91089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // CIE Pointer 911e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCAsmInfo &asmInfo = context.getAsmInfo(); 9120d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola if (IsEH) { 9130d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart, 9140d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola 0); 9152541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE CIE Offset"); 9160d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitAbsValue(offset, 4); 917e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola } else if (!asmInfo.doesDwarfRequireRelocationForSectionOffset()) { 918e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart, 919e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola cieStart, 0); 920e3a0e987f3d4f07512cdb64b9034369f966cb448Rafael Espindola streamer.EmitAbsValue(offset, 4); 9210d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } else { 9220d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola streamer.EmitSymbolValue(&cieStart, 4); 9230d450dc65906a30beb56aeb1ee22b45b1cd4596cRafael Espindola } 9242541c41f3e2af94585e14353a91f02facd65e415Bill Wendling 9251be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng unsigned fdeEncoding = TAI.getFDEEncoding(UsingCFI); 926abf9af60add19a0f037bb2a05433769bfd1e7f6fRafael Espindola unsigned size = getSizeForEncoding(streamer, fdeEncoding); 92789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 92889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Begin 9299989ef43faf1cd7eb01a6d45063f5040e9c8bb3eRafael Espindola unsigned PCBeginEncoding = IsEH ? fdeEncoding : 9309989ef43faf1cd7eb01a6d45063f5040e9c8bb3eRafael Espindola (unsigned)dwarf::DW_EH_PE_absptr; 93140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned PCBeginSize = getSizeForEncoding(streamer, PCBeginEncoding); 9322541c41f3e2af94585e14353a91f02facd65e415Bill Wendling EmitSymbol(streamer, *frame.Begin, PCBeginEncoding, "FDE initial location"); 93389b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 93489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // PC Range 93589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin, 93689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola *frame.End, 0); 9372541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("FDE address range"); 9389266cc400ee2fc86abb24ab0819d9da280fb61c4Rafael Espindola streamer.EmitAbsValue(Range, size); 93989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 94040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (IsEH) { 94140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data Length 94240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola unsigned augmentationLength = 0; 9431f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 94440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 94540a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola augmentationLength += getSizeForEncoding(streamer, frame.LsdaEncoding); 9461f6c87554a0d78103b95816fd2c1ce392b366bcfRafael Espindola 9472541c41f3e2af94585e14353a91f02facd65e415Bill Wendling if (verboseAsm) streamer.AddComment("Augmentation size"); 94840a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitULEB128IntValue(augmentationLength); 94989b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 95040a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola // Augmentation Data 95140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola if (frame.Lsda) 9522541c41f3e2af94585e14353a91f02facd65e415Bill Wendling EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding, 9532541c41f3e2af94585e14353a91f02facd65e415Bill Wendling "Language Specific Data Area"); 95440a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola } 9554892dff07e7d99eb37aee868c4f2c91e9c7eba14Rafael Espindola 95689b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Call Frame Instructions 95789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 958b40a71fda188f8ca564e606ac2cb051a44ada311Rafael Espindola EmitCFIInstructions(streamer, frame.Instructions, frame.Begin); 9595bba08425374ca36fe5fbc7423ce1a09858e4097Rafael Espindola 96089b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola // Padding 96140a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola streamer.EmitValueToAlignment(PCBeginSize); 962dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola 963dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola return fdeEnd; 96489b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 96589b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola 96619282365147f498a60463d250dbed2f8e1b81861Benjamin Kramernamespace { 96719282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer struct CIEKey { 96819282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1); } 96919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0); } 97019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer 97119282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer CIEKey(const MCSymbol* Personality_, unsigned PersonalityEncoding_, 97219282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned LsdaEncoding_) : Personality(Personality_), 97319282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer PersonalityEncoding(PersonalityEncoding_), 97419282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer LsdaEncoding(LsdaEncoding_) { 97519282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer } 97619282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer const MCSymbol* Personality; 97719282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned PersonalityEncoding; 97819282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer unsigned LsdaEncoding; 97919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer }; 98019282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer} 981bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 982bdc3167c086dd4358e24692075db5e7784140843Rafael Espindolanamespace llvm { 983bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola template <> 984bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola struct DenseMapInfo<CIEKey> { 985bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getEmptyKey() { 98619282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getEmptyKey(); 987bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 988bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static CIEKey getTombstoneKey() { 98919282365147f498a60463d250dbed2f8e1b81861Benjamin Kramer return CIEKey::getTombstoneKey(); 990bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 991bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static unsigned getHashValue(const CIEKey &Key) { 992bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola FoldingSetNodeID ID; 993bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola ID.AddPointer(Key.Personality); 994bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola ID.AddInteger(Key.PersonalityEncoding); 995bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola ID.AddInteger(Key.LsdaEncoding); 996bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola return ID.ComputeHash(); 997bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 998bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola static bool isEqual(const CIEKey &LHS, 999bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola const CIEKey &RHS) { 1000bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola return LHS.Personality == RHS.Personality && 1001bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola LHS.PersonalityEncoding == RHS.PersonalityEncoding && 1002bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola LHS.LsdaEncoding == RHS.LsdaEncoding; 1003bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola } 1004bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola }; 1005bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola} 1006bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola 1007a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendlingvoid MCDwarfFrameEmitter::Emit(MCStreamer &Streamer, 1008a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling bool UsingCFI, 1009a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling bool IsEH) { 1010a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCContext &Context = Streamer.getContext(); 10111be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const TargetAsmInfo &TAI = Context.getTargetAsmInfo(); 10121be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng const MCSection &Section = IsEH ? *TAI.getEHFrameSection() : 10131be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng *TAI.getDwarfFrameSection(); 1014a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.SwitchSection(&Section); 1015a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCSymbol *SectionStart = Context.CreateTempSymbol(); 1016a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(SectionStart); 1017a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling 1018a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling MCSymbol *FDEEnd = NULL; 1019bdc3167c086dd4358e24692075db5e7784140843Rafael Espindola DenseMap<CIEKey, const MCSymbol*> CIEStarts; 1020a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling FrameEmitterImpl Emitter(UsingCFI, IsEH, SectionStart); 1021d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 102240a7dbbeff44c4cbd8c7e4f07f28dd614f8a5d08Rafael Espindola const MCSymbol *DummyDebugKey = NULL; 1023a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) { 1024a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i); 10251be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng if (IsEH && TAI.getCompactUnwindSection() && 10268440fe21668fd4d47378371073af0702ea9413bcBill Wendling Emitter.EmitCompactUnwind(Streamer, Frame)) { 10278440fe21668fd4d47378371073af0702ea9413bcBill Wendling FDEEnd = NULL; 1028e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling continue; 10298440fe21668fd4d47378371073af0702ea9413bcBill Wendling } 1030e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1031a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling CIEKey Key(Frame.Personality, Frame.PersonalityEncoding, 1032a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Frame.LsdaEncoding); 1033a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey; 1034a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling if (!CIEStart) 1035a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling CIEStart = &Emitter.EmitCIE(Streamer, Frame.Personality, 1036a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Frame.PersonalityEncoding, Frame.Lsda, 1037a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Frame.LsdaEncoding); 1038e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1039a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling FDEEnd = Emitter.EmitFDE(Streamer, *CIEStart, Frame); 1040e3cd13f0e2d4e2ef30f8a57c0a82d328102eeb26Bill Wendling 1041dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola if (i != n - 1) 1042a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(FDEEnd); 1043dfe125cc9cfd524575973daa297c9aad10470390Rafael Espindola } 1044d7c8ccae8e48dce3ab7c3e9b4d8a309998c47961Rafael Espindola 10451be0e271a07925b928ba89848934f1ea6f1854e2Evan Cheng Streamer.EmitValueToAlignment(Context.getAsmInfo().getPointerSize()); 1046a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling if (FDEEnd) 1047a8c9e6a943bc0873d1ce781d2444a6d6137f0e17Bill Wendling Streamer.EmitLabel(FDEEnd); 104889b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola} 1049245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1050245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EmitAdvanceLoc(MCStreamer &Streamer, 1051245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint64_t AddrDelta) { 1052245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola SmallString<256> Tmp; 1053245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola raw_svector_ostream OS(Tmp); 10544eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola MCDwarfFrameEmitter::EncodeAdvanceLoc(AddrDelta, OS); 1055245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola Streamer.EmitBytes(OS.str(), /*AddrSpace=*/0); 1056245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1057245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola 1058245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindolavoid MCDwarfFrameEmitter::EncodeAdvanceLoc(uint64_t AddrDelta, 10594eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola raw_ostream &OS) { 1060245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola // FIXME: Assumes the code alignment factor is 1. 10613b78cdc57ae25ff021fd67171a7c82d533477a19Rafael Espindola if (AddrDelta == 0) { 10624eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUIntN(6, AddrDelta)) { 1063245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola uint8_t Opcode = dwarf::DW_CFA_advance_loc | AddrDelta; 1064245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << Opcode; 10654eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<8>(AddrDelta)) { 1066245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc1); 1067245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(AddrDelta); 10684eafe109459eb115f13f1d19c5ff3cb3678e8c7aRafael Espindola } else if (isUInt<16>(AddrDelta)) { 1069a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 1070245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc2); 1071a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 1072a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 1073245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } else { 1074a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola // FIXME: check what is the correct behavior on a big endian machine. 1075245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola assert(isUInt<32>(AddrDelta)); 1076245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola OS << uint8_t(dwarf::DW_CFA_advance_loc4); 1077a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t( AddrDelta & 0xff); 1078a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 8) & 0xff); 1079a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 16) & 0xff); 1080a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola OS << uint8_t((AddrDelta >> 24) & 0xff); 1081a7e450574c45209ca0b05ff715f9e7dddcbd936cRafael Espindola 1082245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola } 1083245a1e20419aa5a3c833d7a8e89168e19d5f4d2cRafael Espindola} 1084