DWARFDebugLine.cpp revision 5eccd36f1a8d917201b39697f3f1b6f45ecc139c
1b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer//===-- DWARFDebugLine.cpp ------------------------------------------------===// 2b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// 3b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// The LLVM Compiler Infrastructure 4b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// 5b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// This file is distributed under the University of Illinois Open Source 6b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// License. See LICENSE.TXT for details. 7b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer// 8b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer//===----------------------------------------------------------------------===// 9b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 10b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "DWARFDebugLine.h" 11b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "llvm/Support/Dwarf.h" 12b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "llvm/Support/Format.h" 13b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer#include "llvm/Support/raw_ostream.h" 147393c7f748acb10b143cab296ae98551b4c430f4Benjamin Kramer#include <algorithm> 15b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerusing namespace llvm; 16b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerusing namespace dwarf; 17b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 18b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Prologue::dump(raw_ostream &OS) const { 19b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << "Line table prologue:\n" 20b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" total_length: 0x%8.8x\n", TotalLength) 21b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" version: %u\n", Version) 22b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format("prologue_length: 0x%8.8x\n", PrologueLength) 23b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format("min_inst_length: %u\n", MinInstLength) 24b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format("default_is_stmt: %u\n", DefaultIsStmt) 25b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" line_base: %i\n", LineBase) 26b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" line_range: %u\n", LineRange) 27b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" opcode_base: %u\n", OpcodeBase); 28b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 29b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 0; i < StandardOpcodeLengths.size(); ++i) 30b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << format("standard_opcode_lengths[%s] = %u\n", LNStandardString(i+1), 31b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer StandardOpcodeLengths[i]); 32b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 33b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!IncludeDirectories.empty()) 34b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 0; i < IncludeDirectories.size(); ++i) 35b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << format("include_directories[%3u] = '", i+1) 36b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << IncludeDirectories[i] << "'\n"; 37b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 38b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!FileNames.empty()) { 39b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << " Dir Mod Time File Len File Name\n" 40b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << " ---- ---------- ---------- -----------" 41b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer "----------------\n"; 42b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 0; i < FileNames.size(); ++i) { 43b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const FileNameEntry& fileEntry = FileNames[i]; 445eccd36f1a8d917201b39697f3f1b6f45ecc139cBenjamin Kramer OS << format("file_names[%3u] %4" PRIu64 " ", i+1, fileEntry.DirIdx) 455eccd36f1a8d917201b39697f3f1b6f45ecc139cBenjamin Kramer << format("0x%8.8" PRIx64 " 0x%8.8" PRIx64 " ", 465eccd36f1a8d917201b39697f3f1b6f45ecc139cBenjamin Kramer fileEntry.ModTime, fileEntry.Length) 47b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << fileEntry.Name << '\n'; 48b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 49b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 50b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 51b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 52b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Row::postAppend() { 53b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer BasicBlock = false; 54b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer PrologueEnd = false; 55b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer EpilogueBegin = false; 56b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 57b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 58b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Row::reset(bool default_is_stmt) { 59b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Address = 0; 60b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Line = 1; 61b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Column = 0; 62b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer File = 1; 63b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Isa = 0; 64b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer IsStmt = default_is_stmt; 65b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer BasicBlock = false; 66b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer EndSequence = false; 67b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer PrologueEnd = false; 68b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer EpilogueBegin = false; 69b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 70b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 71b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::Row::dump(raw_ostream &OS) const { 7241a964931a0e0943ceef28b0c691843bf8ca87b7Benjamin Kramer OS << format("0x%16.16" PRIx64 " %6u %6u", Address, Line, Column) 73b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << format(" %6u %3u ", File, Isa) 74b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (IsStmt ? " is_stmt" : "") 75b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (BasicBlock ? " basic_block" : "") 76b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (PrologueEnd ? " prologue_end" : "") 77b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (EpilogueBegin ? " epilogue_begin" : "") 78b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << (EndSequence ? " end_sequence" : "") 79b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << '\n'; 80b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 81b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 82b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::LineTable::dump(raw_ostream &OS) const { 83b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Prologue.dump(OS); 84b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << '\n'; 85b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 86b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!Rows.empty()) { 87b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer OS << "Address Line Column File ISA Flags\n" 88b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer << "------------------ ------ ------ ------ --- -------------\n"; 89b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (std::vector<Row>::const_iterator pos = Rows.begin(), 90b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer end = Rows.end(); pos != end; ++pos) 91b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer pos->dump(OS); 92b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 93b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 94b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 956bc4e712dc35db68a621f54c176f6e0b14f40f97Nick LewyckyDWARFDebugLine::State::~State() {} 966bc4e712dc35db68a621f54c176f6e0b14f40f97Nick Lewycky 97b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::State::appendRowToMatrix(uint32_t offset) { 98b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer ++row; // Increase the row number. 99b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer LineTable::appendRow(*this); 100b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Row::postAppend(); 101b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 102b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 1036bc4e712dc35db68a621f54c176f6e0b14f40f97Nick LewyckyDWARFDebugLine::DumpingState::~DumpingState() {} 1046bc4e712dc35db68a621f54c176f6e0b14f40f97Nick Lewycky 105b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramervoid DWARFDebugLine::DumpingState::finalize(uint32_t offset) { 106b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer LineTable::dump(OS); 107b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 108b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 109b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerconst DWARFDebugLine::LineTable * 110b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin KramerDWARFDebugLine::getLineTable(uint32_t offset) const { 111b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer LineTableConstIter pos = LineTableMap.find(offset); 112b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (pos != LineTableMap.end()) 113b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return &pos->second; 114b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return 0; 115b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 116b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 117c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramerconst DWARFDebugLine::LineTable * 118c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin KramerDWARFDebugLine::getOrParseLineTable(DataExtractor debug_line_data, 119c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer uint32_t offset) { 1201d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer std::pair<LineTableIter, bool> pos = 1211d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer LineTableMap.insert(LineTableMapTy::value_type(offset, LineTable())); 1221d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer if (pos.second) { 123c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer // Parse and cache the line table for at this offset. 124c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer State state; 125c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer if (!parseStatementTable(debug_line_data, &offset, state)) 126c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer return 0; 1271d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer pos.first->second = state; 128c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer } 1291d13d9ed969259d3be267cf0e2c6fe92c1baed49Benjamin Kramer return &pos.first->second; 130c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer} 131c26ed9b47ff77ca6244feda9e3837b49624605dbBenjamin Kramer 132b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerbool 133b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin KramerDWARFDebugLine::parsePrologue(DataExtractor debug_line_data, 134b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t *offset_ptr, Prologue *prologue) { 135b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t prologue_offset = *offset_ptr; 136b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 137b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->clear(); 138b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->TotalLength = debug_line_data.getU32(offset_ptr); 139b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->Version = debug_line_data.getU16(offset_ptr); 140b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (prologue->Version != 2) 141b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return false; 142b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 143b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->PrologueLength = debug_line_data.getU32(offset_ptr); 144b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t end_prologue_offset = prologue->PrologueLength + *offset_ptr; 145b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength = debug_line_data.getU8(offset_ptr); 146b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->DefaultIsStmt = debug_line_data.getU8(offset_ptr); 147b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->LineBase = debug_line_data.getU8(offset_ptr); 148b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->LineRange = debug_line_data.getU8(offset_ptr); 149b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->OpcodeBase = debug_line_data.getU8(offset_ptr); 150b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 151b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->StandardOpcodeLengths.reserve(prologue->OpcodeBase-1); 152b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint32_t i = 1; i < prologue->OpcodeBase; ++i) { 153b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t op_len = debug_line_data.getU8(offset_ptr); 154b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->StandardOpcodeLengths.push_back(op_len); 155b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 156b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 157b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer while (*offset_ptr < end_prologue_offset) { 158b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const char *s = debug_line_data.getCStr(offset_ptr); 159b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (s && s[0]) 160b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->IncludeDirectories.push_back(s); 161b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer else 162b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 163b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 164b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 165b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer while (*offset_ptr < end_prologue_offset) { 166b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const char *name = debug_line_data.getCStr(offset_ptr); 167b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (name && name[0]) { 168b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer FileNameEntry fileEntry; 169b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Name = name; 170b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.DirIdx = debug_line_data.getULEB128(offset_ptr); 171b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.ModTime = debug_line_data.getULEB128(offset_ptr); 172b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Length = debug_line_data.getULEB128(offset_ptr); 173b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->FileNames.push_back(fileEntry); 174b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } else { 175b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 176b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 177b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 178b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 179b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (*offset_ptr != end_prologue_offset) { 180b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fprintf(stderr, "warning: parsing line table prologue at 0x%8.8x should" 1813a79eac5b8b2fa9e1376a7833723b6bfc1d26570NAKAMURA Takumi " have ended at 0x%8.8x but it ended ad 0x%8.8x\n", 182b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue_offset, end_prologue_offset, *offset_ptr); 183b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 184b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return end_prologue_offset; 185b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 186b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 187b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerbool 188b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin KramerDWARFDebugLine::parseStatementTable(DataExtractor debug_line_data, 189b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t *offset_ptr, State &state) { 190b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t debug_line_offset = *offset_ptr; 191b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 192b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer Prologue *prologue = &state.Prologue; 193b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 194b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!parsePrologue(debug_line_data, offset_ptr, prologue)) { 195b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Restore our offset and return false to indicate failure! 196b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer *offset_ptr = debug_line_offset; 197b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return false; 198b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 199b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 200b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const uint32_t end_offset = debug_line_offset + prologue->TotalLength + 201b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer sizeof(prologue->TotalLength); 202b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 2039013db3399d2847899ba32daf58844bba1aef6ddBenjamin Kramer state.reset(); 2049013db3399d2847899ba32daf58844bba1aef6ddBenjamin Kramer 205b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer while (*offset_ptr < end_offset) { 206b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t opcode = debug_line_data.getU8(offset_ptr); 207b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 208b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (opcode == 0) { 209b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Extended Opcodes always start with a zero opcode followed by 210b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a uleb128 length so you can skip ones you don't know about 211b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t ext_offset = *offset_ptr; 212b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint64_t len = debug_line_data.getULEB128(offset_ptr); 213b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t arg_size = len - (*offset_ptr - ext_offset); 214b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 215b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t sub_opcode = debug_line_data.getU8(offset_ptr); 216b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer switch (sub_opcode) { 217b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNE_end_sequence: 218b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Set the end_sequence register of the state machine to true and 219b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // append a row to the matrix using the current values of the 220b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state-machine registers. Then reset the registers to the initial 221b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // values specified above. Every statement program sequence must end 222b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // with a DW_LNE_end_sequence instruction which creates a row whose 223b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // address is that of the byte after the last target machine instruction 224b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // of the sequence. 225b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.EndSequence = true; 226b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.appendRowToMatrix(*offset_ptr); 227b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.reset(); 228b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 229b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 230b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNE_set_address: 231b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single relocatable address as an operand. The size of the 232b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // operand is the size appropriate to hold an address on the target 233b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // machine. Set the address register to the value given by the 234b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // relocatable address. All of the other statement program opcodes 235b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // that affect the address register add a delta to it. This instruction 236b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // stores a relocatable value into it instead. 237b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address = debug_line_data.getAddress(offset_ptr); 238b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 239b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 240b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNE_define_file: 241b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes 4 arguments. The first is a null terminated string containing 242b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a source file name. The second is an unsigned LEB128 number 243b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // representing the directory index of the directory in which the file 244b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // was found. The third is an unsigned LEB128 number representing the 245b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // time of last modification of the file. The fourth is an unsigned 246b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // LEB128 number representing the length in bytes of the file. The time 247b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // and length fields may contain LEB128(0) if the information is not 248b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // available. 249b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 250b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // The directory index represents an entry in the include_directories 251b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // section of the statement program prologue. The index is LEB128(0) 252b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // if the file was found in the current directory of the compilation, 253b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // LEB128(1) if it was found in the first directory in the 254b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // include_directories section, and so on. The directory index is 255b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // ignored for file names that represent full path names. 256b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 257b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // The files are numbered, starting at 1, in the order in which they 258b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // appear; the names in the prologue come before names defined by 259b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the DW_LNE_define_file instruction. These numbers are used in the 260b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the file register of the state machine. 261b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer { 262b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer FileNameEntry fileEntry; 263b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Name = debug_line_data.getCStr(offset_ptr); 264b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.DirIdx = debug_line_data.getULEB128(offset_ptr); 265b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.ModTime = debug_line_data.getULEB128(offset_ptr); 266b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer fileEntry.Length = debug_line_data.getULEB128(offset_ptr); 267b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->FileNames.push_back(fileEntry); 268b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 269b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 270b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 271b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer default: 272b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Length doesn't include the zero opcode byte or the length itself, but 273b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // it does include the sub_opcode, so we have to adjust for that below 274b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer (*offset_ptr) += arg_size; 275b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 276b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 277b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } else if (opcode < prologue->OpcodeBase) { 278b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer switch (opcode) { 279b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Standard Opcodes 280b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_copy: 281b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Append a row to the matrix using the 282b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // current values of the state-machine registers. Then set 283b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the basic_block register to false. 284b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.appendRowToMatrix(*offset_ptr); 285b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 286b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 287b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_advance_pc: 288b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand, multiplies it by the 289b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // min_inst_length field of the prologue, and adds the 290b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // result to the address register of the state machine. 291b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += debug_line_data.getULEB128(offset_ptr) * 292b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength; 293b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 294b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 295b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_advance_line: 296b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single signed LEB128 operand and adds that value to 297b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the line register of the state machine. 298b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Line += debug_line_data.getSLEB128(offset_ptr); 299b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 300b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 301b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_file: 302b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand and stores it in the file 303b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // register of the state machine. 304b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.File = debug_line_data.getULEB128(offset_ptr); 305b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 306b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 307b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_column: 308b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand and stores it in the 309b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // column register of the state machine. 310b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Column = debug_line_data.getULEB128(offset_ptr); 311b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 312b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 313b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_negate_stmt: 314b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the is_stmt register of the state 315b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // machine to the logical negation of its current value. 316b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.IsStmt = !state.IsStmt; 317b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 318b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 319b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_basic_block: 320b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the basic_block register of the 321b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state machine to true 322b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.BasicBlock = true; 323b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 324b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 325b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_const_add_pc: 326b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Add to the address register of the state 327b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // machine the address increment value corresponding to special 328b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode 255. The motivation for DW_LNS_const_add_pc is this: 329b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // when the statement program needs to advance the address by a 330b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // small amount, it can use a single special opcode, which occupies 331b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a single byte. When it needs to advance the address by up to 332b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // twice the range of the last special opcode, it can use 333b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // DW_LNS_const_add_pc followed by a special opcode, for a total 334b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // of two bytes. Only if it needs to advance the address by more 335b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // than twice that range will it need to use both DW_LNS_advance_pc 336b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // and a special opcode, requiring three or more bytes. 337b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer { 338b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t adjust_opcode = 255 - prologue->OpcodeBase; 339b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint64_t addr_offset = (adjust_opcode / prologue->LineRange) * 340b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength; 341b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += addr_offset; 342b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 343b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 344b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 345b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_fixed_advance_pc: 346b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single uhalf operand. Add to the address register of 347b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the state machine the value of the (unencoded) operand. This 348b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // is the only extended opcode that takes an argument that is not 349b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // a variable length number. The motivation for DW_LNS_fixed_advance_pc 350b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // is this: existing assemblers cannot emit DW_LNS_advance_pc or 351b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // special opcodes because they cannot encode LEB128 numbers or 352b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // judge when the computation of a special opcode overflows and 353b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // requires the use of DW_LNS_advance_pc. Such assemblers, however, 354b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // can use DW_LNS_fixed_advance_pc instead, sacrificing compression. 355b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += debug_line_data.getU16(offset_ptr); 356b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 357b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 358b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_prologue_end: 359b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the prologue_end register of the 360b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state machine to true 361b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.PrologueEnd = true; 362b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 363b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 364b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_epilogue_begin: 365b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes no arguments. Set the basic_block register of the 366b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // state machine to true 367b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.EpilogueBegin = true; 368b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 369b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 370b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer case DW_LNS_set_isa: 371b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Takes a single unsigned LEB128 operand and stores it in the 372b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // column register of the state machine. 373b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Isa = debug_line_data.getULEB128(offset_ptr); 374b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 375b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 376b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer default: 377b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Handle any unknown standard opcodes here. We know the lengths 378b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // of such opcodes because they are specified in the prologue 379b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // as a multiple of LEB128 operands for each opcode. 380b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer { 381068d9a564b6010787992597f75e2065ceffb53eaBenjamin Kramer assert(opcode - 1U < prologue->StandardOpcodeLengths.size()); 382b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t opcode_length = prologue->StandardOpcodeLengths[opcode - 1]; 383b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer for (uint8_t i=0; i<opcode_length; ++i) 384b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer debug_line_data.getULEB128(offset_ptr); 385b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 386b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer break; 387b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 388b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } else { 389b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Special Opcodes 390b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 391b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // A special opcode value is chosen based on the amount that needs 392b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // to be added to the line and address registers. The maximum line 393b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // increment for a special opcode is the value of the line_base 394b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // field in the header, plus the value of the line_range field, 395b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // minus 1 (line base + line range - 1). If the desired line 396b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // increment is greater than the maximum line increment, a standard 397017449d64b8920eb926e9e752e22d2f5921a6237NAKAMURA Takumi // opcode must be used instead of a special opcode. The "address 398017449d64b8920eb926e9e752e22d2f5921a6237NAKAMURA Takumi // advance" is calculated by dividing the desired address increment 399b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // by the minimum_instruction_length field from the header. The 400b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // special opcode is then calculated using the following formula: 401b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 402b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode = (desired line increment - line_base) + 403b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // (line_range * address advance) + opcode_base 404b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 405b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // If the resulting opcode is greater than 255, a standard opcode 406b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // must be used instead. 407b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 408b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // To decode a special opcode, subtract the opcode_base from the 409b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode itself to give the adjusted opcode. The amount to 410b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // increment the address register is the result of the adjusted 411b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // opcode divided by the line_range multiplied by the 412b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // minimum_instruction_length field from the header. That is: 413b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 414b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // address increment = (adjusted opcode / line_range) * 415b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // minimum_instruction_length 416b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 417b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // The amount to increment the line register is the line_base plus 418b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the result of the adjusted opcode modulo the line_range. That is: 419b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // 420b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // line increment = line_base + (adjusted opcode % line_range) 421b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 422b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint8_t adjust_opcode = opcode - prologue->OpcodeBase; 423b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint64_t addr_offset = (adjust_opcode / prologue->LineRange) * 424b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer prologue->MinInstLength; 425b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer int32_t line_offset = prologue->LineBase + 426b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer (adjust_opcode % prologue->LineRange); 427b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Line += line_offset; 428b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.Address += addr_offset; 429b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.appendRowToMatrix(*offset_ptr); 430b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 431b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 432b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 433b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer state.finalize(*offset_ptr); 434b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 435b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return end_offset; 436b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 437b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 438b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramerstatic bool findMatchingAddress(const DWARFDebugLine::Row& row1, 439b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer const DWARFDebugLine::Row& row2) { 440b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return row1.Address < row2.Address; 441b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 442b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer 443b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Krameruint32_t 444b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin KramerDWARFDebugLine::LineTable::lookupAddress(uint64_t address, 445b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint64_t cu_high_pc) const { 446b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer uint32_t index = UINT32_MAX; 447b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (!Rows.empty()) { 448b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Use the lower_bound algorithm to perform a binary search since we know 449b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // that our line table data is ordered by address. 450b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer DWARFDebugLine::Row row; 451b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer row.Address = address; 452b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer typedef std::vector<Row>::const_iterator iterator; 453b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer iterator begin_pos = Rows.begin(); 454b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer iterator end_pos = Rows.end(); 455b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer iterator pos = std::lower_bound(begin_pos, end_pos, row, 456b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer findMatchingAddress); 457b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (pos == end_pos) { 458b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (address < cu_high_pc) 459b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return Rows.size()-1; 460b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } else { 461b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // Rely on fact that we are using a std::vector and we can do 462b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // pointer arithmetic to find the row index (which will be one less 463b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // that what we found since it will find the first position after 464b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // the current address) since std::vector iterators are just 465b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer // pointers to the container type. 466b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer index = pos - begin_pos; 467b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (pos->Address > address) { 468b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer if (index > 0) 469b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer --index; 470b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer else 471b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer index = UINT32_MAX; 472b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 473b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 474b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer } 475b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer return index; // Failed to find address. 476b848e976110a2c4f0a6a9e252115ba291c844fbeBenjamin Kramer} 477