1 //===-- Disassembler.cpp --------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "lldb/Core/Disassembler.h" 10 11 #include "lldb/Core/AddressRange.h" 12 #include "lldb/Core/Debugger.h" 13 #include "lldb/Core/EmulateInstruction.h" 14 #include "lldb/Core/Mangled.h" 15 #include "lldb/Core/Module.h" 16 #include "lldb/Core/ModuleList.h" 17 #include "lldb/Core/PluginManager.h" 18 #include "lldb/Core/SourceManager.h" 19 #include "lldb/Host/FileSystem.h" 20 #include "lldb/Interpreter/OptionValue.h" 21 #include "lldb/Interpreter/OptionValueArray.h" 22 #include "lldb/Interpreter/OptionValueDictionary.h" 23 #include "lldb/Interpreter/OptionValueRegex.h" 24 #include "lldb/Interpreter/OptionValueString.h" 25 #include "lldb/Interpreter/OptionValueUInt64.h" 26 #include "lldb/Symbol/Function.h" 27 #include "lldb/Symbol/Symbol.h" 28 #include "lldb/Symbol/SymbolContext.h" 29 #include "lldb/Target/ExecutionContext.h" 30 #include "lldb/Target/SectionLoadList.h" 31 #include "lldb/Target/StackFrame.h" 32 #include "lldb/Target/Target.h" 33 #include "lldb/Target/Thread.h" 34 #include "lldb/Utility/DataBufferHeap.h" 35 #include "lldb/Utility/DataExtractor.h" 36 #include "lldb/Utility/RegularExpression.h" 37 #include "lldb/Utility/Status.h" 38 #include "lldb/Utility/Stream.h" 39 #include "lldb/Utility/StreamString.h" 40 #include "lldb/Utility/Timer.h" 41 #include "lldb/lldb-private-enumerations.h" 42 #include "lldb/lldb-private-interfaces.h" 43 #include "lldb/lldb-private-types.h" 44 #include "llvm/Support/Compiler.h" 45 #include "llvm/TargetParser/Triple.h" 46 47 #include <cstdint> 48 #include <cstring> 49 #include <utility> 50 51 #include <cassert> 52 53 #define DEFAULT_DISASM_BYTE_SIZE 32 54 55 using namespace lldb; 56 using namespace lldb_private; 57 58 DisassemblerSP Disassembler::FindPlugin(const ArchSpec &arch, 59 const char *flavor, 60 const char *plugin_name) { 61 LLDB_SCOPED_TIMERF("Disassembler::FindPlugin (arch = %s, plugin_name = %s)", 62 arch.GetArchitectureName(), plugin_name); 63 64 DisassemblerCreateInstance create_callback = nullptr; 65 66 if (plugin_name) { 67 create_callback = 68 PluginManager::GetDisassemblerCreateCallbackForPluginName(plugin_name); 69 if (create_callback) { 70 if (auto disasm_sp = create_callback(arch, flavor)) 71 return disasm_sp; 72 } 73 } else { 74 for (uint32_t idx = 0; 75 (create_callback = PluginManager::GetDisassemblerCreateCallbackAtIndex( 76 idx)) != nullptr; 77 ++idx) { 78 if (auto disasm_sp = create_callback(arch, flavor)) 79 return disasm_sp; 80 } 81 } 82 return DisassemblerSP(); 83 } 84 85 DisassemblerSP Disassembler::FindPluginForTarget(const Target &target, 86 const ArchSpec &arch, 87 const char *flavor, 88 const char *plugin_name) { 89 if (flavor == nullptr) { 90 // FIXME - we don't have the mechanism in place to do per-architecture 91 // settings. But since we know that for now we only support flavors on x86 92 // & x86_64, 93 if (arch.GetTriple().getArch() == llvm::Triple::x86 || 94 arch.GetTriple().getArch() == llvm::Triple::x86_64) 95 flavor = target.GetDisassemblyFlavor(); 96 } 97 return FindPlugin(arch, flavor, plugin_name); 98 } 99 100 static Address ResolveAddress(Target &target, const Address &addr) { 101 if (!addr.IsSectionOffset()) { 102 Address resolved_addr; 103 // If we weren't passed in a section offset address range, try and resolve 104 // it to something 105 bool is_resolved = target.GetSectionLoadList().IsEmpty() 106 ? target.GetImages().ResolveFileAddress( 107 addr.GetOffset(), resolved_addr) 108 : target.GetSectionLoadList().ResolveLoadAddress( 109 addr.GetOffset(), resolved_addr); 110 111 // We weren't able to resolve the address, just treat it as a raw address 112 if (is_resolved && resolved_addr.IsValid()) 113 return resolved_addr; 114 } 115 return addr; 116 } 117 118 lldb::DisassemblerSP Disassembler::DisassembleRange( 119 const ArchSpec &arch, const char *plugin_name, const char *flavor, 120 Target &target, const AddressRange &range, bool force_live_memory) { 121 if (range.GetByteSize() <= 0) 122 return {}; 123 124 if (!range.GetBaseAddress().IsValid()) 125 return {}; 126 127 lldb::DisassemblerSP disasm_sp = 128 Disassembler::FindPluginForTarget(target, arch, flavor, plugin_name); 129 130 if (!disasm_sp) 131 return {}; 132 133 const size_t bytes_disassembled = disasm_sp->ParseInstructions( 134 target, range.GetBaseAddress(), {Limit::Bytes, range.GetByteSize()}, 135 nullptr, force_live_memory); 136 if (bytes_disassembled == 0) 137 return {}; 138 139 return disasm_sp; 140 } 141 142 lldb::DisassemblerSP 143 Disassembler::DisassembleBytes(const ArchSpec &arch, const char *plugin_name, 144 const char *flavor, const Address &start, 145 const void *src, size_t src_len, 146 uint32_t num_instructions, bool data_from_file) { 147 if (!src) 148 return {}; 149 150 lldb::DisassemblerSP disasm_sp = 151 Disassembler::FindPlugin(arch, flavor, plugin_name); 152 153 if (!disasm_sp) 154 return {}; 155 156 DataExtractor data(src, src_len, arch.GetByteOrder(), 157 arch.GetAddressByteSize()); 158 159 (void)disasm_sp->DecodeInstructions(start, data, 0, num_instructions, false, 160 data_from_file); 161 return disasm_sp; 162 } 163 164 bool Disassembler::Disassemble(Debugger &debugger, const ArchSpec &arch, 165 const char *plugin_name, const char *flavor, 166 const ExecutionContext &exe_ctx, 167 const Address &address, Limit limit, 168 bool mixed_source_and_assembly, 169 uint32_t num_mixed_context_lines, 170 uint32_t options, Stream &strm) { 171 if (!exe_ctx.GetTargetPtr()) 172 return false; 173 174 lldb::DisassemblerSP disasm_sp(Disassembler::FindPluginForTarget( 175 exe_ctx.GetTargetRef(), arch, flavor, plugin_name)); 176 if (!disasm_sp) 177 return false; 178 179 const bool force_live_memory = true; 180 size_t bytes_disassembled = disasm_sp->ParseInstructions( 181 exe_ctx.GetTargetRef(), address, limit, &strm, force_live_memory); 182 if (bytes_disassembled == 0) 183 return false; 184 185 disasm_sp->PrintInstructions(debugger, arch, exe_ctx, 186 mixed_source_and_assembly, 187 num_mixed_context_lines, options, strm); 188 return true; 189 } 190 191 Disassembler::SourceLine 192 Disassembler::GetFunctionDeclLineEntry(const SymbolContext &sc) { 193 if (!sc.function) 194 return {}; 195 196 if (!sc.line_entry.IsValid()) 197 return {}; 198 199 LineEntry prologue_end_line = sc.line_entry; 200 FileSpec func_decl_file; 201 uint32_t func_decl_line; 202 sc.function->GetStartLineSourceInfo(func_decl_file, func_decl_line); 203 204 if (func_decl_file != prologue_end_line.file && 205 func_decl_file != prologue_end_line.original_file) 206 return {}; 207 208 SourceLine decl_line; 209 decl_line.file = func_decl_file; 210 decl_line.line = func_decl_line; 211 // TODO: Do we care about column on these entries? If so, we need to plumb 212 // that through GetStartLineSourceInfo. 213 decl_line.column = 0; 214 return decl_line; 215 } 216 217 void Disassembler::AddLineToSourceLineTables( 218 SourceLine &line, 219 std::map<FileSpec, std::set<uint32_t>> &source_lines_seen) { 220 if (line.IsValid()) { 221 auto source_lines_seen_pos = source_lines_seen.find(line.file); 222 if (source_lines_seen_pos == source_lines_seen.end()) { 223 std::set<uint32_t> lines; 224 lines.insert(line.line); 225 source_lines_seen.emplace(line.file, lines); 226 } else { 227 source_lines_seen_pos->second.insert(line.line); 228 } 229 } 230 } 231 232 bool Disassembler::ElideMixedSourceAndDisassemblyLine( 233 const ExecutionContext &exe_ctx, const SymbolContext &sc, 234 SourceLine &line) { 235 236 // TODO: should we also check target.process.thread.step-avoid-libraries ? 237 238 const RegularExpression *avoid_regex = nullptr; 239 240 // Skip any line #0 entries - they are implementation details 241 if (line.line == 0) 242 return true; 243 244 ThreadSP thread_sp = exe_ctx.GetThreadSP(); 245 if (thread_sp) { 246 avoid_regex = thread_sp->GetSymbolsToAvoidRegexp(); 247 } else { 248 TargetSP target_sp = exe_ctx.GetTargetSP(); 249 if (target_sp) { 250 Status error; 251 OptionValueSP value_sp = target_sp->GetDebugger().GetPropertyValue( 252 &exe_ctx, "target.process.thread.step-avoid-regexp", error); 253 if (value_sp && value_sp->GetType() == OptionValue::eTypeRegex) { 254 OptionValueRegex *re = value_sp->GetAsRegex(); 255 if (re) { 256 avoid_regex = re->GetCurrentValue(); 257 } 258 } 259 } 260 } 261 if (avoid_regex && sc.symbol != nullptr) { 262 const char *function_name = 263 sc.GetFunctionName(Mangled::ePreferDemangledWithoutArguments) 264 .GetCString(); 265 if (function_name && avoid_regex->Execute(function_name)) { 266 // skip this source line 267 return true; 268 } 269 } 270 // don't skip this source line 271 return false; 272 } 273 274 void Disassembler::PrintInstructions(Debugger &debugger, const ArchSpec &arch, 275 const ExecutionContext &exe_ctx, 276 bool mixed_source_and_assembly, 277 uint32_t num_mixed_context_lines, 278 uint32_t options, Stream &strm) { 279 // We got some things disassembled... 280 size_t num_instructions_found = GetInstructionList().GetSize(); 281 282 const uint32_t max_opcode_byte_size = 283 GetInstructionList().GetMaxOpcocdeByteSize(); 284 SymbolContext sc; 285 SymbolContext prev_sc; 286 AddressRange current_source_line_range; 287 const Address *pc_addr_ptr = nullptr; 288 StackFrame *frame = exe_ctx.GetFramePtr(); 289 290 TargetSP target_sp(exe_ctx.GetTargetSP()); 291 SourceManager &source_manager = 292 target_sp ? target_sp->GetSourceManager() : debugger.GetSourceManager(); 293 294 if (frame) { 295 pc_addr_ptr = &frame->GetFrameCodeAddress(); 296 } 297 const uint32_t scope = 298 eSymbolContextLineEntry | eSymbolContextFunction | eSymbolContextSymbol; 299 const bool use_inline_block_range = false; 300 301 const FormatEntity::Entry *disassembly_format = nullptr; 302 FormatEntity::Entry format; 303 if (exe_ctx.HasTargetScope()) { 304 disassembly_format = 305 exe_ctx.GetTargetRef().GetDebugger().GetDisassemblyFormat(); 306 } else { 307 FormatEntity::Parse("${addr}: ", format); 308 disassembly_format = &format; 309 } 310 311 // First pass: step through the list of instructions, find how long the 312 // initial addresses strings are, insert padding in the second pass so the 313 // opcodes all line up nicely. 314 315 // Also build up the source line mapping if this is mixed source & assembly 316 // mode. Calculate the source line for each assembly instruction (eliding 317 // inlined functions which the user wants to skip). 318 319 std::map<FileSpec, std::set<uint32_t>> source_lines_seen; 320 Symbol *previous_symbol = nullptr; 321 322 size_t address_text_size = 0; 323 for (size_t i = 0; i < num_instructions_found; ++i) { 324 Instruction *inst = GetInstructionList().GetInstructionAtIndex(i).get(); 325 if (inst) { 326 const Address &addr = inst->GetAddress(); 327 ModuleSP module_sp(addr.GetModule()); 328 if (module_sp) { 329 const SymbolContextItem resolve_mask = eSymbolContextFunction | 330 eSymbolContextSymbol | 331 eSymbolContextLineEntry; 332 uint32_t resolved_mask = 333 module_sp->ResolveSymbolContextForAddress(addr, resolve_mask, sc); 334 if (resolved_mask) { 335 StreamString strmstr; 336 Debugger::FormatDisassemblerAddress(disassembly_format, &sc, nullptr, 337 &exe_ctx, &addr, strmstr); 338 size_t cur_line = strmstr.GetSizeOfLastLine(); 339 if (cur_line > address_text_size) 340 address_text_size = cur_line; 341 342 // Add entries to our "source_lines_seen" map+set which list which 343 // sources lines occur in this disassembly session. We will print 344 // lines of context around a source line, but we don't want to print 345 // a source line that has a line table entry of its own - we'll leave 346 // that source line to be printed when it actually occurs in the 347 // disassembly. 348 349 if (mixed_source_and_assembly && sc.line_entry.IsValid()) { 350 if (sc.symbol != previous_symbol) { 351 SourceLine decl_line = GetFunctionDeclLineEntry(sc); 352 if (!ElideMixedSourceAndDisassemblyLine(exe_ctx, sc, decl_line)) 353 AddLineToSourceLineTables(decl_line, source_lines_seen); 354 } 355 if (sc.line_entry.IsValid()) { 356 SourceLine this_line; 357 this_line.file = sc.line_entry.file; 358 this_line.line = sc.line_entry.line; 359 this_line.column = sc.line_entry.column; 360 if (!ElideMixedSourceAndDisassemblyLine(exe_ctx, sc, this_line)) 361 AddLineToSourceLineTables(this_line, source_lines_seen); 362 } 363 } 364 } 365 sc.Clear(false); 366 } 367 } 368 } 369 370 previous_symbol = nullptr; 371 SourceLine previous_line; 372 for (size_t i = 0; i < num_instructions_found; ++i) { 373 Instruction *inst = GetInstructionList().GetInstructionAtIndex(i).get(); 374 375 if (inst) { 376 const Address &addr = inst->GetAddress(); 377 const bool inst_is_at_pc = pc_addr_ptr && addr == *pc_addr_ptr; 378 SourceLinesToDisplay source_lines_to_display; 379 380 prev_sc = sc; 381 382 ModuleSP module_sp(addr.GetModule()); 383 if (module_sp) { 384 uint32_t resolved_mask = module_sp->ResolveSymbolContextForAddress( 385 addr, eSymbolContextEverything, sc); 386 if (resolved_mask) { 387 if (mixed_source_and_assembly) { 388 389 // If we've started a new function (non-inlined), print all of the 390 // source lines from the function declaration until the first line 391 // table entry - typically the opening curly brace of the function. 392 if (previous_symbol != sc.symbol) { 393 // The default disassembly format puts an extra blank line 394 // between functions - so when we're displaying the source 395 // context for a function, we don't want to add a blank line 396 // after the source context or we'll end up with two of them. 397 if (previous_symbol != nullptr) 398 source_lines_to_display.print_source_context_end_eol = false; 399 400 previous_symbol = sc.symbol; 401 if (sc.function && sc.line_entry.IsValid()) { 402 LineEntry prologue_end_line = sc.line_entry; 403 if (!ElideMixedSourceAndDisassemblyLine(exe_ctx, sc, 404 prologue_end_line)) { 405 FileSpec func_decl_file; 406 uint32_t func_decl_line; 407 sc.function->GetStartLineSourceInfo(func_decl_file, 408 func_decl_line); 409 if (func_decl_file == prologue_end_line.file || 410 func_decl_file == prologue_end_line.original_file) { 411 // Add all the lines between the function declaration and 412 // the first non-prologue source line to the list of lines 413 // to print. 414 for (uint32_t lineno = func_decl_line; 415 lineno <= prologue_end_line.line; lineno++) { 416 SourceLine this_line; 417 this_line.file = func_decl_file; 418 this_line.line = lineno; 419 source_lines_to_display.lines.push_back(this_line); 420 } 421 // Mark the last line as the "current" one. Usually this 422 // is the open curly brace. 423 if (source_lines_to_display.lines.size() > 0) 424 source_lines_to_display.current_source_line = 425 source_lines_to_display.lines.size() - 1; 426 } 427 } 428 } 429 sc.GetAddressRange(scope, 0, use_inline_block_range, 430 current_source_line_range); 431 } 432 433 // If we've left a previous source line's address range, print a 434 // new source line 435 if (!current_source_line_range.ContainsFileAddress(addr)) { 436 sc.GetAddressRange(scope, 0, use_inline_block_range, 437 current_source_line_range); 438 439 if (sc != prev_sc && sc.comp_unit && sc.line_entry.IsValid()) { 440 SourceLine this_line; 441 this_line.file = sc.line_entry.file; 442 this_line.line = sc.line_entry.line; 443 444 if (!ElideMixedSourceAndDisassemblyLine(exe_ctx, sc, 445 this_line)) { 446 // Only print this source line if it is different from the 447 // last source line we printed. There may have been inlined 448 // functions between these lines that we elided, resulting in 449 // the same line being printed twice in a row for a 450 // contiguous block of assembly instructions. 451 if (this_line != previous_line) { 452 453 std::vector<uint32_t> previous_lines; 454 for (uint32_t i = 0; 455 i < num_mixed_context_lines && 456 (this_line.line - num_mixed_context_lines) > 0; 457 i++) { 458 uint32_t line = 459 this_line.line - num_mixed_context_lines + i; 460 auto pos = source_lines_seen.find(this_line.file); 461 if (pos != source_lines_seen.end()) { 462 if (pos->second.count(line) == 1) { 463 previous_lines.clear(); 464 } else { 465 previous_lines.push_back(line); 466 } 467 } 468 } 469 for (size_t i = 0; i < previous_lines.size(); i++) { 470 SourceLine previous_line; 471 previous_line.file = this_line.file; 472 previous_line.line = previous_lines[i]; 473 auto pos = source_lines_seen.find(previous_line.file); 474 if (pos != source_lines_seen.end()) { 475 pos->second.insert(previous_line.line); 476 } 477 source_lines_to_display.lines.push_back(previous_line); 478 } 479 480 source_lines_to_display.lines.push_back(this_line); 481 source_lines_to_display.current_source_line = 482 source_lines_to_display.lines.size() - 1; 483 484 for (uint32_t i = 0; i < num_mixed_context_lines; i++) { 485 SourceLine next_line; 486 next_line.file = this_line.file; 487 next_line.line = this_line.line + i + 1; 488 auto pos = source_lines_seen.find(next_line.file); 489 if (pos != source_lines_seen.end()) { 490 if (pos->second.count(next_line.line) == 1) 491 break; 492 pos->second.insert(next_line.line); 493 } 494 source_lines_to_display.lines.push_back(next_line); 495 } 496 } 497 previous_line = this_line; 498 } 499 } 500 } 501 } 502 } else { 503 sc.Clear(true); 504 } 505 } 506 507 if (source_lines_to_display.lines.size() > 0) { 508 strm.EOL(); 509 for (size_t idx = 0; idx < source_lines_to_display.lines.size(); 510 idx++) { 511 SourceLine ln = source_lines_to_display.lines[idx]; 512 const char *line_highlight = ""; 513 if (inst_is_at_pc && (options & eOptionMarkPCSourceLine)) { 514 line_highlight = "->"; 515 } else if (idx == source_lines_to_display.current_source_line) { 516 line_highlight = "**"; 517 } 518 source_manager.DisplaySourceLinesWithLineNumbers( 519 ln.file, ln.line, ln.column, 0, 0, line_highlight, &strm); 520 } 521 if (source_lines_to_display.print_source_context_end_eol) 522 strm.EOL(); 523 } 524 525 const bool show_bytes = (options & eOptionShowBytes) != 0; 526 const bool show_control_flow_kind = 527 (options & eOptionShowControlFlowKind) != 0; 528 inst->Dump(&strm, max_opcode_byte_size, true, show_bytes, 529 show_control_flow_kind, &exe_ctx, &sc, &prev_sc, nullptr, 530 address_text_size); 531 strm.EOL(); 532 } else { 533 break; 534 } 535 } 536 } 537 538 bool Disassembler::Disassemble(Debugger &debugger, const ArchSpec &arch, 539 StackFrame &frame, Stream &strm) { 540 AddressRange range; 541 SymbolContext sc( 542 frame.GetSymbolContext(eSymbolContextFunction | eSymbolContextSymbol)); 543 if (sc.function) { 544 range = sc.function->GetAddressRange(); 545 } else if (sc.symbol && sc.symbol->ValueIsAddress()) { 546 range.GetBaseAddress() = sc.symbol->GetAddressRef(); 547 range.SetByteSize(sc.symbol->GetByteSize()); 548 } else { 549 range.GetBaseAddress() = frame.GetFrameCodeAddress(); 550 } 551 552 if (range.GetBaseAddress().IsValid() && range.GetByteSize() == 0) 553 range.SetByteSize(DEFAULT_DISASM_BYTE_SIZE); 554 555 Disassembler::Limit limit = {Disassembler::Limit::Bytes, 556 range.GetByteSize()}; 557 if (limit.value == 0) 558 limit.value = DEFAULT_DISASM_BYTE_SIZE; 559 560 return Disassemble(debugger, arch, nullptr, nullptr, frame, 561 range.GetBaseAddress(), limit, false, 0, 0, strm); 562 } 563 564 Instruction::Instruction(const Address &address, AddressClass addr_class) 565 : m_address(address), m_address_class(addr_class), m_opcode(), 566 m_calculated_strings(false) {} 567 568 Instruction::~Instruction() = default; 569 570 AddressClass Instruction::GetAddressClass() { 571 if (m_address_class == AddressClass::eInvalid) 572 m_address_class = m_address.GetAddressClass(); 573 return m_address_class; 574 } 575 576 const char *Instruction::GetNameForInstructionControlFlowKind( 577 lldb::InstructionControlFlowKind instruction_control_flow_kind) { 578 switch (instruction_control_flow_kind) { 579 case eInstructionControlFlowKindUnknown: 580 return "unknown"; 581 case eInstructionControlFlowKindOther: 582 return "other"; 583 case eInstructionControlFlowKindCall: 584 return "call"; 585 case eInstructionControlFlowKindReturn: 586 return "return"; 587 case eInstructionControlFlowKindJump: 588 return "jump"; 589 case eInstructionControlFlowKindCondJump: 590 return "cond jump"; 591 case eInstructionControlFlowKindFarCall: 592 return "far call"; 593 case eInstructionControlFlowKindFarReturn: 594 return "far return"; 595 case eInstructionControlFlowKindFarJump: 596 return "far jump"; 597 } 598 llvm_unreachable("Fully covered switch above!"); 599 } 600 601 void Instruction::Dump(lldb_private::Stream *s, uint32_t max_opcode_byte_size, 602 bool show_address, bool show_bytes, 603 bool show_control_flow_kind, 604 const ExecutionContext *exe_ctx, 605 const SymbolContext *sym_ctx, 606 const SymbolContext *prev_sym_ctx, 607 const FormatEntity::Entry *disassembly_addr_format, 608 size_t max_address_text_size) { 609 size_t opcode_column_width = 7; 610 const size_t operand_column_width = 25; 611 612 CalculateMnemonicOperandsAndCommentIfNeeded(exe_ctx); 613 614 StreamString ss; 615 616 if (show_address) { 617 Debugger::FormatDisassemblerAddress(disassembly_addr_format, sym_ctx, 618 prev_sym_ctx, exe_ctx, &m_address, ss); 619 ss.FillLastLineToColumn(max_address_text_size, ' '); 620 } 621 622 if (show_bytes) { 623 if (m_opcode.GetType() == Opcode::eTypeBytes) { 624 // x86_64 and i386 are the only ones that use bytes right now so pad out 625 // the byte dump to be able to always show 15 bytes (3 chars each) plus a 626 // space 627 if (max_opcode_byte_size > 0) 628 m_opcode.Dump(&ss, max_opcode_byte_size * 3 + 1); 629 else 630 m_opcode.Dump(&ss, 15 * 3 + 1); 631 } else { 632 // Else, we have ARM or MIPS which can show up to a uint32_t 0x00000000 633 // (10 spaces) plus two for padding... 634 if (max_opcode_byte_size > 0) 635 m_opcode.Dump(&ss, max_opcode_byte_size * 3 + 1); 636 else 637 m_opcode.Dump(&ss, 12); 638 } 639 } 640 641 if (show_control_flow_kind) { 642 lldb::InstructionControlFlowKind instruction_control_flow_kind = 643 GetControlFlowKind(exe_ctx); 644 ss.Printf("%-12s", GetNameForInstructionControlFlowKind( 645 instruction_control_flow_kind)); 646 } 647 648 bool show_color = false; 649 if (exe_ctx) { 650 if (TargetSP target_sp = exe_ctx->GetTargetSP()) { 651 show_color = target_sp->GetDebugger().GetUseColor(); 652 } 653 } 654 const size_t opcode_pos = ss.GetSizeOfLastLine(); 655 const std::string &opcode_name = 656 show_color ? m_markup_opcode_name : m_opcode_name; 657 const std::string &mnemonics = show_color ? m_markup_mnemonics : m_mnemonics; 658 659 // The default opcode size of 7 characters is plenty for most architectures 660 // but some like arm can pull out the occasional vqrshrun.s16. We won't get 661 // consistent column spacing in these cases, unfortunately. Also note that we 662 // need to directly use m_opcode_name here (instead of opcode_name) so we 663 // don't include color codes as characters. 664 if (m_opcode_name.length() >= opcode_column_width) { 665 opcode_column_width = m_opcode_name.length() + 1; 666 } 667 668 ss.PutCString(opcode_name); 669 ss.FillLastLineToColumn(opcode_pos + opcode_column_width, ' '); 670 ss.PutCString(mnemonics); 671 672 if (!m_comment.empty()) { 673 ss.FillLastLineToColumn( 674 opcode_pos + opcode_column_width + operand_column_width, ' '); 675 ss.PutCString(" ; "); 676 ss.PutCString(m_comment); 677 } 678 s->PutCString(ss.GetString()); 679 } 680 681 bool Instruction::DumpEmulation(const ArchSpec &arch) { 682 std::unique_ptr<EmulateInstruction> insn_emulator_up( 683 EmulateInstruction::FindPlugin(arch, eInstructionTypeAny, nullptr)); 684 if (insn_emulator_up) { 685 insn_emulator_up->SetInstruction(GetOpcode(), GetAddress(), nullptr); 686 return insn_emulator_up->EvaluateInstruction(0); 687 } 688 689 return false; 690 } 691 692 bool Instruction::CanSetBreakpoint () { 693 return !HasDelaySlot(); 694 } 695 696 bool Instruction::HasDelaySlot() { 697 // Default is false. 698 return false; 699 } 700 701 OptionValueSP Instruction::ReadArray(FILE *in_file, Stream &out_stream, 702 OptionValue::Type data_type) { 703 bool done = false; 704 char buffer[1024]; 705 706 auto option_value_sp = std::make_shared<OptionValueArray>(1u << data_type); 707 708 int idx = 0; 709 while (!done) { 710 if (!fgets(buffer, 1023, in_file)) { 711 out_stream.Printf( 712 "Instruction::ReadArray: Error reading file (fgets).\n"); 713 option_value_sp.reset(); 714 return option_value_sp; 715 } 716 717 std::string line(buffer); 718 719 size_t len = line.size(); 720 if (line[len - 1] == '\n') { 721 line[len - 1] = '\0'; 722 line.resize(len - 1); 723 } 724 725 if ((line.size() == 1) && line[0] == ']') { 726 done = true; 727 line.clear(); 728 } 729 730 if (!line.empty()) { 731 std::string value; 732 static RegularExpression g_reg_exp( 733 llvm::StringRef("^[ \t]*([^ \t]+)[ \t]*$")); 734 llvm::SmallVector<llvm::StringRef, 2> matches; 735 if (g_reg_exp.Execute(line, &matches)) 736 value = matches[1].str(); 737 else 738 value = line; 739 740 OptionValueSP data_value_sp; 741 switch (data_type) { 742 case OptionValue::eTypeUInt64: 743 data_value_sp = std::make_shared<OptionValueUInt64>(0, 0); 744 data_value_sp->SetValueFromString(value); 745 break; 746 // Other types can be added later as needed. 747 default: 748 data_value_sp = std::make_shared<OptionValueString>(value.c_str(), ""); 749 break; 750 } 751 752 option_value_sp->GetAsArray()->InsertValue(idx, data_value_sp); 753 ++idx; 754 } 755 } 756 757 return option_value_sp; 758 } 759 760 OptionValueSP Instruction::ReadDictionary(FILE *in_file, Stream &out_stream) { 761 bool done = false; 762 char buffer[1024]; 763 764 auto option_value_sp = std::make_shared<OptionValueDictionary>(); 765 static constexpr llvm::StringLiteral encoding_key("data_encoding"); 766 OptionValue::Type data_type = OptionValue::eTypeInvalid; 767 768 while (!done) { 769 // Read the next line in the file 770 if (!fgets(buffer, 1023, in_file)) { 771 out_stream.Printf( 772 "Instruction::ReadDictionary: Error reading file (fgets).\n"); 773 option_value_sp.reset(); 774 return option_value_sp; 775 } 776 777 // Check to see if the line contains the end-of-dictionary marker ("}") 778 std::string line(buffer); 779 780 size_t len = line.size(); 781 if (line[len - 1] == '\n') { 782 line[len - 1] = '\0'; 783 line.resize(len - 1); 784 } 785 786 if ((line.size() == 1) && (line[0] == '}')) { 787 done = true; 788 line.clear(); 789 } 790 791 // Try to find a key-value pair in the current line and add it to the 792 // dictionary. 793 if (!line.empty()) { 794 static RegularExpression g_reg_exp(llvm::StringRef( 795 "^[ \t]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t]*=[ \t]*(.*)[ \t]*$")); 796 797 llvm::SmallVector<llvm::StringRef, 3> matches; 798 799 bool reg_exp_success = g_reg_exp.Execute(line, &matches); 800 std::string key; 801 std::string value; 802 if (reg_exp_success) { 803 key = matches[1].str(); 804 value = matches[2].str(); 805 } else { 806 out_stream.Printf("Instruction::ReadDictionary: Failure executing " 807 "regular expression.\n"); 808 option_value_sp.reset(); 809 return option_value_sp; 810 } 811 812 // Check value to see if it's the start of an array or dictionary. 813 814 lldb::OptionValueSP value_sp; 815 assert(value.empty() == false); 816 assert(key.empty() == false); 817 818 if (value[0] == '{') { 819 assert(value.size() == 1); 820 // value is a dictionary 821 value_sp = ReadDictionary(in_file, out_stream); 822 if (!value_sp) { 823 option_value_sp.reset(); 824 return option_value_sp; 825 } 826 } else if (value[0] == '[') { 827 assert(value.size() == 1); 828 // value is an array 829 value_sp = ReadArray(in_file, out_stream, data_type); 830 if (!value_sp) { 831 option_value_sp.reset(); 832 return option_value_sp; 833 } 834 // We've used the data_type to read an array; re-set the type to 835 // Invalid 836 data_type = OptionValue::eTypeInvalid; 837 } else if ((value[0] == '0') && (value[1] == 'x')) { 838 value_sp = std::make_shared<OptionValueUInt64>(0, 0); 839 value_sp->SetValueFromString(value); 840 } else { 841 size_t len = value.size(); 842 if ((value[0] == '"') && (value[len - 1] == '"')) 843 value = value.substr(1, len - 2); 844 value_sp = std::make_shared<OptionValueString>(value.c_str(), ""); 845 } 846 847 if (key == encoding_key) { 848 // A 'data_encoding=..." is NOT a normal key-value pair; it is meta-data 849 // indicating the data type of an upcoming array (usually the next bit 850 // of data to be read in). 851 if (llvm::StringRef(value) == "uint32_t") 852 data_type = OptionValue::eTypeUInt64; 853 } else 854 option_value_sp->GetAsDictionary()->SetValueForKey(key, value_sp, 855 false); 856 } 857 } 858 859 return option_value_sp; 860 } 861 862 bool Instruction::TestEmulation(Stream &out_stream, const char *file_name) { 863 if (!file_name) { 864 out_stream.Printf("Instruction::TestEmulation: Missing file_name."); 865 return false; 866 } 867 FILE *test_file = FileSystem::Instance().Fopen(file_name, "r"); 868 if (!test_file) { 869 out_stream.Printf( 870 "Instruction::TestEmulation: Attempt to open test file failed."); 871 return false; 872 } 873 874 char buffer[256]; 875 if (!fgets(buffer, 255, test_file)) { 876 out_stream.Printf( 877 "Instruction::TestEmulation: Error reading first line of test file.\n"); 878 fclose(test_file); 879 return false; 880 } 881 882 if (strncmp(buffer, "InstructionEmulationState={", 27) != 0) { 883 out_stream.Printf("Instructin::TestEmulation: Test file does not contain " 884 "emulation state dictionary\n"); 885 fclose(test_file); 886 return false; 887 } 888 889 // Read all the test information from the test file into an 890 // OptionValueDictionary. 891 892 OptionValueSP data_dictionary_sp(ReadDictionary(test_file, out_stream)); 893 if (!data_dictionary_sp) { 894 out_stream.Printf( 895 "Instruction::TestEmulation: Error reading Dictionary Object.\n"); 896 fclose(test_file); 897 return false; 898 } 899 900 fclose(test_file); 901 902 OptionValueDictionary *data_dictionary = 903 data_dictionary_sp->GetAsDictionary(); 904 static constexpr llvm::StringLiteral description_key("assembly_string"); 905 static constexpr llvm::StringLiteral triple_key("triple"); 906 907 OptionValueSP value_sp = data_dictionary->GetValueForKey(description_key); 908 909 if (!value_sp) { 910 out_stream.Printf("Instruction::TestEmulation: Test file does not " 911 "contain description string.\n"); 912 return false; 913 } 914 915 SetDescription(value_sp->GetValueAs<llvm::StringRef>().value_or("")); 916 917 value_sp = data_dictionary->GetValueForKey(triple_key); 918 if (!value_sp) { 919 out_stream.Printf( 920 "Instruction::TestEmulation: Test file does not contain triple.\n"); 921 return false; 922 } 923 924 ArchSpec arch; 925 arch.SetTriple( 926 llvm::Triple(value_sp->GetValueAs<llvm::StringRef>().value_or(""))); 927 928 bool success = false; 929 std::unique_ptr<EmulateInstruction> insn_emulator_up( 930 EmulateInstruction::FindPlugin(arch, eInstructionTypeAny, nullptr)); 931 if (insn_emulator_up) 932 success = 933 insn_emulator_up->TestEmulation(out_stream, arch, data_dictionary); 934 935 if (success) 936 out_stream.Printf("Emulation test succeeded."); 937 else 938 out_stream.Printf("Emulation test failed."); 939 940 return success; 941 } 942 943 bool Instruction::Emulate( 944 const ArchSpec &arch, uint32_t evaluate_options, void *baton, 945 EmulateInstruction::ReadMemoryCallback read_mem_callback, 946 EmulateInstruction::WriteMemoryCallback write_mem_callback, 947 EmulateInstruction::ReadRegisterCallback read_reg_callback, 948 EmulateInstruction::WriteRegisterCallback write_reg_callback) { 949 std::unique_ptr<EmulateInstruction> insn_emulator_up( 950 EmulateInstruction::FindPlugin(arch, eInstructionTypeAny, nullptr)); 951 if (insn_emulator_up) { 952 insn_emulator_up->SetBaton(baton); 953 insn_emulator_up->SetCallbacks(read_mem_callback, write_mem_callback, 954 read_reg_callback, write_reg_callback); 955 insn_emulator_up->SetInstruction(GetOpcode(), GetAddress(), nullptr); 956 return insn_emulator_up->EvaluateInstruction(evaluate_options); 957 } 958 959 return false; 960 } 961 962 uint32_t Instruction::GetData(DataExtractor &data) { 963 return m_opcode.GetData(data); 964 } 965 966 InstructionList::InstructionList() : m_instructions() {} 967 968 InstructionList::~InstructionList() = default; 969 970 size_t InstructionList::GetSize() const { return m_instructions.size(); } 971 972 uint32_t InstructionList::GetMaxOpcocdeByteSize() const { 973 uint32_t max_inst_size = 0; 974 collection::const_iterator pos, end; 975 for (pos = m_instructions.begin(), end = m_instructions.end(); pos != end; 976 ++pos) { 977 uint32_t inst_size = (*pos)->GetOpcode().GetByteSize(); 978 if (max_inst_size < inst_size) 979 max_inst_size = inst_size; 980 } 981 return max_inst_size; 982 } 983 984 InstructionSP InstructionList::GetInstructionAtIndex(size_t idx) const { 985 InstructionSP inst_sp; 986 if (idx < m_instructions.size()) 987 inst_sp = m_instructions[idx]; 988 return inst_sp; 989 } 990 991 InstructionSP InstructionList::GetInstructionAtAddress(const Address &address) { 992 uint32_t index = GetIndexOfInstructionAtAddress(address); 993 if (index != UINT32_MAX) 994 return GetInstructionAtIndex(index); 995 return nullptr; 996 } 997 998 void InstructionList::Dump(Stream *s, bool show_address, bool show_bytes, 999 bool show_control_flow_kind, 1000 const ExecutionContext *exe_ctx) { 1001 const uint32_t max_opcode_byte_size = GetMaxOpcocdeByteSize(); 1002 collection::const_iterator pos, begin, end; 1003 1004 const FormatEntity::Entry *disassembly_format = nullptr; 1005 FormatEntity::Entry format; 1006 if (exe_ctx && exe_ctx->HasTargetScope()) { 1007 disassembly_format = 1008 exe_ctx->GetTargetRef().GetDebugger().GetDisassemblyFormat(); 1009 } else { 1010 FormatEntity::Parse("${addr}: ", format); 1011 disassembly_format = &format; 1012 } 1013 1014 for (begin = m_instructions.begin(), end = m_instructions.end(), pos = begin; 1015 pos != end; ++pos) { 1016 if (pos != begin) 1017 s->EOL(); 1018 (*pos)->Dump(s, max_opcode_byte_size, show_address, show_bytes, 1019 show_control_flow_kind, exe_ctx, nullptr, nullptr, 1020 disassembly_format, 0); 1021 } 1022 } 1023 1024 void InstructionList::Clear() { m_instructions.clear(); } 1025 1026 void InstructionList::Append(lldb::InstructionSP &inst_sp) { 1027 if (inst_sp) 1028 m_instructions.push_back(inst_sp); 1029 } 1030 1031 uint32_t 1032 InstructionList::GetIndexOfNextBranchInstruction(uint32_t start, 1033 bool ignore_calls, 1034 bool *found_calls) const { 1035 size_t num_instructions = m_instructions.size(); 1036 1037 uint32_t next_branch = UINT32_MAX; 1038 1039 if (found_calls) 1040 *found_calls = false; 1041 for (size_t i = start; i < num_instructions; i++) { 1042 if (m_instructions[i]->DoesBranch()) { 1043 if (ignore_calls && m_instructions[i]->IsCall()) { 1044 if (found_calls) 1045 *found_calls = true; 1046 continue; 1047 } 1048 next_branch = i; 1049 break; 1050 } 1051 } 1052 1053 return next_branch; 1054 } 1055 1056 uint32_t 1057 InstructionList::GetIndexOfInstructionAtAddress(const Address &address) { 1058 size_t num_instructions = m_instructions.size(); 1059 uint32_t index = UINT32_MAX; 1060 for (size_t i = 0; i < num_instructions; i++) { 1061 if (m_instructions[i]->GetAddress() == address) { 1062 index = i; 1063 break; 1064 } 1065 } 1066 return index; 1067 } 1068 1069 uint32_t 1070 InstructionList::GetIndexOfInstructionAtLoadAddress(lldb::addr_t load_addr, 1071 Target &target) { 1072 Address address; 1073 address.SetLoadAddress(load_addr, &target); 1074 return GetIndexOfInstructionAtAddress(address); 1075 } 1076 1077 size_t Disassembler::ParseInstructions(Target &target, Address start, 1078 Limit limit, Stream *error_strm_ptr, 1079 bool force_live_memory) { 1080 m_instruction_list.Clear(); 1081 1082 if (!start.IsValid()) 1083 return 0; 1084 1085 start = ResolveAddress(target, start); 1086 1087 addr_t byte_size = limit.value; 1088 if (limit.kind == Limit::Instructions) 1089 byte_size *= m_arch.GetMaximumOpcodeByteSize(); 1090 auto data_sp = std::make_shared<DataBufferHeap>(byte_size, '\0'); 1091 1092 Status error; 1093 lldb::addr_t load_addr = LLDB_INVALID_ADDRESS; 1094 const size_t bytes_read = 1095 target.ReadMemory(start, data_sp->GetBytes(), data_sp->GetByteSize(), 1096 error, force_live_memory, &load_addr); 1097 const bool data_from_file = load_addr == LLDB_INVALID_ADDRESS; 1098 1099 if (bytes_read == 0) { 1100 if (error_strm_ptr) { 1101 if (const char *error_cstr = error.AsCString()) 1102 error_strm_ptr->Printf("error: %s\n", error_cstr); 1103 } 1104 return 0; 1105 } 1106 1107 if (bytes_read != data_sp->GetByteSize()) 1108 data_sp->SetByteSize(bytes_read); 1109 DataExtractor data(data_sp, m_arch.GetByteOrder(), 1110 m_arch.GetAddressByteSize()); 1111 return DecodeInstructions(start, data, 0, 1112 limit.kind == Limit::Instructions ? limit.value 1113 : UINT32_MAX, 1114 false, data_from_file); 1115 } 1116 1117 // Disassembler copy constructor 1118 Disassembler::Disassembler(const ArchSpec &arch, const char *flavor) 1119 : m_arch(arch), m_instruction_list(), m_base_addr(LLDB_INVALID_ADDRESS), 1120 m_flavor() { 1121 if (flavor == nullptr) 1122 m_flavor.assign("default"); 1123 else 1124 m_flavor.assign(flavor); 1125 1126 // If this is an arm variant that can only include thumb (T16, T32) 1127 // instructions, force the arch triple to be "thumbv.." instead of "armv..." 1128 if (arch.IsAlwaysThumbInstructions()) { 1129 std::string thumb_arch_name(arch.GetTriple().getArchName().str()); 1130 // Replace "arm" with "thumb" so we get all thumb variants correct 1131 if (thumb_arch_name.size() > 3) { 1132 thumb_arch_name.erase(0, 3); 1133 thumb_arch_name.insert(0, "thumb"); 1134 } 1135 m_arch.SetTriple(thumb_arch_name.c_str()); 1136 } 1137 } 1138 1139 Disassembler::~Disassembler() = default; 1140 1141 InstructionList &Disassembler::GetInstructionList() { 1142 return m_instruction_list; 1143 } 1144 1145 const InstructionList &Disassembler::GetInstructionList() const { 1146 return m_instruction_list; 1147 } 1148 1149 // Class PseudoInstruction 1150 1151 PseudoInstruction::PseudoInstruction() 1152 : Instruction(Address(), AddressClass::eUnknown), m_description() {} 1153 1154 PseudoInstruction::~PseudoInstruction() = default; 1155 1156 bool PseudoInstruction::DoesBranch() { 1157 // This is NOT a valid question for a pseudo instruction. 1158 return false; 1159 } 1160 1161 bool PseudoInstruction::HasDelaySlot() { 1162 // This is NOT a valid question for a pseudo instruction. 1163 return false; 1164 } 1165 1166 bool PseudoInstruction::IsLoad() { return false; } 1167 1168 bool PseudoInstruction::IsAuthenticated() { return false; } 1169 1170 size_t PseudoInstruction::Decode(const lldb_private::Disassembler &disassembler, 1171 const lldb_private::DataExtractor &data, 1172 lldb::offset_t data_offset) { 1173 return m_opcode.GetByteSize(); 1174 } 1175 1176 void PseudoInstruction::SetOpcode(size_t opcode_size, void *opcode_data) { 1177 if (!opcode_data) 1178 return; 1179 1180 switch (opcode_size) { 1181 case 8: { 1182 uint8_t value8 = *((uint8_t *)opcode_data); 1183 m_opcode.SetOpcode8(value8, eByteOrderInvalid); 1184 break; 1185 } 1186 case 16: { 1187 uint16_t value16 = *((uint16_t *)opcode_data); 1188 m_opcode.SetOpcode16(value16, eByteOrderInvalid); 1189 break; 1190 } 1191 case 32: { 1192 uint32_t value32 = *((uint32_t *)opcode_data); 1193 m_opcode.SetOpcode32(value32, eByteOrderInvalid); 1194 break; 1195 } 1196 case 64: { 1197 uint64_t value64 = *((uint64_t *)opcode_data); 1198 m_opcode.SetOpcode64(value64, eByteOrderInvalid); 1199 break; 1200 } 1201 default: 1202 break; 1203 } 1204 } 1205 1206 void PseudoInstruction::SetDescription(llvm::StringRef description) { 1207 m_description = std::string(description); 1208 } 1209 1210 Instruction::Operand Instruction::Operand::BuildRegister(ConstString &r) { 1211 Operand ret; 1212 ret.m_type = Type::Register; 1213 ret.m_register = r; 1214 return ret; 1215 } 1216 1217 Instruction::Operand Instruction::Operand::BuildImmediate(lldb::addr_t imm, 1218 bool neg) { 1219 Operand ret; 1220 ret.m_type = Type::Immediate; 1221 ret.m_immediate = imm; 1222 ret.m_negative = neg; 1223 return ret; 1224 } 1225 1226 Instruction::Operand Instruction::Operand::BuildImmediate(int64_t imm) { 1227 Operand ret; 1228 ret.m_type = Type::Immediate; 1229 if (imm < 0) { 1230 ret.m_immediate = -imm; 1231 ret.m_negative = true; 1232 } else { 1233 ret.m_immediate = imm; 1234 ret.m_negative = false; 1235 } 1236 return ret; 1237 } 1238 1239 Instruction::Operand 1240 Instruction::Operand::BuildDereference(const Operand &ref) { 1241 Operand ret; 1242 ret.m_type = Type::Dereference; 1243 ret.m_children = {ref}; 1244 return ret; 1245 } 1246 1247 Instruction::Operand Instruction::Operand::BuildSum(const Operand &lhs, 1248 const Operand &rhs) { 1249 Operand ret; 1250 ret.m_type = Type::Sum; 1251 ret.m_children = {lhs, rhs}; 1252 return ret; 1253 } 1254 1255 Instruction::Operand Instruction::Operand::BuildProduct(const Operand &lhs, 1256 const Operand &rhs) { 1257 Operand ret; 1258 ret.m_type = Type::Product; 1259 ret.m_children = {lhs, rhs}; 1260 return ret; 1261 } 1262 1263 std::function<bool(const Instruction::Operand &)> 1264 lldb_private::OperandMatchers::MatchBinaryOp( 1265 std::function<bool(const Instruction::Operand &)> base, 1266 std::function<bool(const Instruction::Operand &)> left, 1267 std::function<bool(const Instruction::Operand &)> right) { 1268 return [base, left, right](const Instruction::Operand &op) -> bool { 1269 return (base(op) && op.m_children.size() == 2 && 1270 ((left(op.m_children[0]) && right(op.m_children[1])) || 1271 (left(op.m_children[1]) && right(op.m_children[0])))); 1272 }; 1273 } 1274 1275 std::function<bool(const Instruction::Operand &)> 1276 lldb_private::OperandMatchers::MatchUnaryOp( 1277 std::function<bool(const Instruction::Operand &)> base, 1278 std::function<bool(const Instruction::Operand &)> child) { 1279 return [base, child](const Instruction::Operand &op) -> bool { 1280 return (base(op) && op.m_children.size() == 1 && child(op.m_children[0])); 1281 }; 1282 } 1283 1284 std::function<bool(const Instruction::Operand &)> 1285 lldb_private::OperandMatchers::MatchRegOp(const RegisterInfo &info) { 1286 return [&info](const Instruction::Operand &op) { 1287 return (op.m_type == Instruction::Operand::Type::Register && 1288 (op.m_register == ConstString(info.name) || 1289 op.m_register == ConstString(info.alt_name))); 1290 }; 1291 } 1292 1293 std::function<bool(const Instruction::Operand &)> 1294 lldb_private::OperandMatchers::FetchRegOp(ConstString ®) { 1295 return [®](const Instruction::Operand &op) { 1296 if (op.m_type != Instruction::Operand::Type::Register) { 1297 return false; 1298 } 1299 reg = op.m_register; 1300 return true; 1301 }; 1302 } 1303 1304 std::function<bool(const Instruction::Operand &)> 1305 lldb_private::OperandMatchers::MatchImmOp(int64_t imm) { 1306 return [imm](const Instruction::Operand &op) { 1307 return (op.m_type == Instruction::Operand::Type::Immediate && 1308 ((op.m_negative && op.m_immediate == (uint64_t)-imm) || 1309 (!op.m_negative && op.m_immediate == (uint64_t)imm))); 1310 }; 1311 } 1312 1313 std::function<bool(const Instruction::Operand &)> 1314 lldb_private::OperandMatchers::FetchImmOp(int64_t &imm) { 1315 return [&imm](const Instruction::Operand &op) { 1316 if (op.m_type != Instruction::Operand::Type::Immediate) { 1317 return false; 1318 } 1319 if (op.m_negative) { 1320 imm = -((int64_t)op.m_immediate); 1321 } else { 1322 imm = ((int64_t)op.m_immediate); 1323 } 1324 return true; 1325 }; 1326 } 1327 1328 std::function<bool(const Instruction::Operand &)> 1329 lldb_private::OperandMatchers::MatchOpType(Instruction::Operand::Type type) { 1330 return [type](const Instruction::Operand &op) { return op.m_type == type; }; 1331 } 1332