1 //===-- GDBRemoteRegisterContext.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 "GDBRemoteRegisterContext.h" 10 11 #include "lldb/Target/ExecutionContext.h" 12 #include "lldb/Target/Target.h" 13 #include "lldb/Utility/DataBufferHeap.h" 14 #include "lldb/Utility/DataExtractor.h" 15 #include "lldb/Utility/RegisterValue.h" 16 #include "lldb/Utility/Scalar.h" 17 #include "lldb/Utility/StreamString.h" 18 #include "ProcessGDBRemote.h" 19 #include "ProcessGDBRemoteLog.h" 20 #include "ThreadGDBRemote.h" 21 #include "Utility/ARM_DWARF_Registers.h" 22 #include "Utility/ARM_ehframe_Registers.h" 23 #include "lldb/Utility/StringExtractorGDBRemote.h" 24 25 #include <memory> 26 27 using namespace lldb; 28 using namespace lldb_private; 29 using namespace lldb_private::process_gdb_remote; 30 31 // GDBRemoteRegisterContext constructor 32 GDBRemoteRegisterContext::GDBRemoteRegisterContext( 33 ThreadGDBRemote &thread, uint32_t concrete_frame_idx, 34 GDBRemoteDynamicRegisterInfoSP reg_info_sp, bool read_all_at_once, 35 bool write_all_at_once) 36 : RegisterContext(thread, concrete_frame_idx), 37 m_reg_info_sp(std::move(reg_info_sp)), m_reg_valid(), m_reg_data(), 38 m_read_all_at_once(read_all_at_once), 39 m_write_all_at_once(write_all_at_once) { 40 // Resize our vector of bools to contain one bool for every register. We will 41 // use these boolean values to know when a register value is valid in 42 // m_reg_data. 43 m_reg_valid.resize(m_reg_info_sp->GetNumRegisters()); 44 45 // Make a heap based buffer that is big enough to store all registers 46 DataBufferSP reg_data_sp( 47 new DataBufferHeap(m_reg_info_sp->GetRegisterDataByteSize(), 0)); 48 m_reg_data.SetData(reg_data_sp); 49 m_reg_data.SetByteOrder(thread.GetProcess()->GetByteOrder()); 50 } 51 52 // Destructor 53 GDBRemoteRegisterContext::~GDBRemoteRegisterContext() {} 54 55 void GDBRemoteRegisterContext::InvalidateAllRegisters() { 56 SetAllRegisterValid(false); 57 } 58 59 void GDBRemoteRegisterContext::SetAllRegisterValid(bool b) { 60 std::vector<bool>::iterator pos, end = m_reg_valid.end(); 61 for (pos = m_reg_valid.begin(); pos != end; ++pos) 62 *pos = b; 63 } 64 65 size_t GDBRemoteRegisterContext::GetRegisterCount() { 66 return m_reg_info_sp->GetNumRegisters(); 67 } 68 69 const RegisterInfo * 70 GDBRemoteRegisterContext::GetRegisterInfoAtIndex(size_t reg) { 71 RegisterInfo *reg_info = m_reg_info_sp->GetRegisterInfoAtIndex(reg); 72 73 if (reg_info && reg_info->dynamic_size_dwarf_expr_bytes) { 74 const ArchSpec &arch = m_thread.GetProcess()->GetTarget().GetArchitecture(); 75 uint8_t reg_size = UpdateDynamicRegisterSize(arch, reg_info); 76 reg_info->byte_size = reg_size; 77 } 78 return reg_info; 79 } 80 81 size_t GDBRemoteRegisterContext::GetRegisterSetCount() { 82 return m_reg_info_sp->GetNumRegisterSets(); 83 } 84 85 const RegisterSet *GDBRemoteRegisterContext::GetRegisterSet(size_t reg_set) { 86 return m_reg_info_sp->GetRegisterSet(reg_set); 87 } 88 89 bool GDBRemoteRegisterContext::ReadRegister(const RegisterInfo *reg_info, 90 RegisterValue &value) { 91 // Read the register 92 if (ReadRegisterBytes(reg_info, m_reg_data)) { 93 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; 94 if (m_reg_valid[reg] == false) 95 return false; 96 const bool partial_data_ok = false; 97 Status error(value.SetValueFromData( 98 reg_info, m_reg_data, reg_info->byte_offset, partial_data_ok)); 99 return error.Success(); 100 } 101 return false; 102 } 103 104 bool GDBRemoteRegisterContext::PrivateSetRegisterValue( 105 uint32_t reg, llvm::ArrayRef<uint8_t> data) { 106 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); 107 if (reg_info == nullptr) 108 return false; 109 110 // Invalidate if needed 111 InvalidateIfNeeded(false); 112 113 const size_t reg_byte_size = reg_info->byte_size; 114 memcpy(const_cast<uint8_t *>( 115 m_reg_data.PeekData(reg_info->byte_offset, reg_byte_size)), 116 data.data(), std::min(data.size(), reg_byte_size)); 117 bool success = data.size() >= reg_byte_size; 118 if (success) { 119 SetRegisterIsValid(reg, true); 120 } else if (data.size() > 0) { 121 // Only set register is valid to false if we copied some bytes, else leave 122 // it as it was. 123 SetRegisterIsValid(reg, false); 124 } 125 return success; 126 } 127 128 bool GDBRemoteRegisterContext::PrivateSetRegisterValue(uint32_t reg, 129 uint64_t new_reg_val) { 130 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg); 131 if (reg_info == nullptr) 132 return false; 133 134 // Early in process startup, we can get a thread that has an invalid byte 135 // order because the process hasn't been completely set up yet (see the ctor 136 // where the byte order is setfrom the process). If that's the case, we 137 // can't set the value here. 138 if (m_reg_data.GetByteOrder() == eByteOrderInvalid) { 139 return false; 140 } 141 142 // Invalidate if needed 143 InvalidateIfNeeded(false); 144 145 DataBufferSP buffer_sp(new DataBufferHeap(&new_reg_val, sizeof(new_reg_val))); 146 DataExtractor data(buffer_sp, endian::InlHostByteOrder(), sizeof(void *)); 147 148 // If our register context and our register info disagree, which should never 149 // happen, don't overwrite past the end of the buffer. 150 if (m_reg_data.GetByteSize() < reg_info->byte_offset + reg_info->byte_size) 151 return false; 152 153 // Grab a pointer to where we are going to put this register 154 uint8_t *dst = const_cast<uint8_t *>( 155 m_reg_data.PeekData(reg_info->byte_offset, reg_info->byte_size)); 156 157 if (dst == nullptr) 158 return false; 159 160 if (data.CopyByteOrderedData(0, // src offset 161 reg_info->byte_size, // src length 162 dst, // dst 163 reg_info->byte_size, // dst length 164 m_reg_data.GetByteOrder())) // dst byte order 165 { 166 SetRegisterIsValid(reg, true); 167 return true; 168 } 169 return false; 170 } 171 172 // Helper function for GDBRemoteRegisterContext::ReadRegisterBytes(). 173 bool GDBRemoteRegisterContext::GetPrimordialRegister( 174 const RegisterInfo *reg_info, GDBRemoteCommunicationClient &gdb_comm) { 175 const uint32_t lldb_reg = reg_info->kinds[eRegisterKindLLDB]; 176 const uint32_t remote_reg = reg_info->kinds[eRegisterKindProcessPlugin]; 177 178 if (DataBufferSP buffer_sp = 179 gdb_comm.ReadRegister(m_thread.GetProtocolID(), remote_reg)) 180 return PrivateSetRegisterValue( 181 lldb_reg, llvm::ArrayRef<uint8_t>(buffer_sp->GetBytes(), 182 buffer_sp->GetByteSize())); 183 return false; 184 } 185 186 bool GDBRemoteRegisterContext::ReadRegisterBytes(const RegisterInfo *reg_info, 187 DataExtractor &data) { 188 ExecutionContext exe_ctx(CalculateThread()); 189 190 Process *process = exe_ctx.GetProcessPtr(); 191 Thread *thread = exe_ctx.GetThreadPtr(); 192 if (process == nullptr || thread == nullptr) 193 return false; 194 195 GDBRemoteCommunicationClient &gdb_comm( 196 ((ProcessGDBRemote *)process)->GetGDBRemote()); 197 198 InvalidateIfNeeded(false); 199 200 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; 201 202 if (!GetRegisterIsValid(reg)) { 203 if (m_read_all_at_once) { 204 if (DataBufferSP buffer_sp = 205 gdb_comm.ReadAllRegisters(m_thread.GetProtocolID())) { 206 memcpy(const_cast<uint8_t *>(m_reg_data.GetDataStart()), 207 buffer_sp->GetBytes(), 208 std::min(buffer_sp->GetByteSize(), m_reg_data.GetByteSize())); 209 if (buffer_sp->GetByteSize() >= m_reg_data.GetByteSize()) { 210 SetAllRegisterValid(true); 211 return true; 212 } else if (buffer_sp->GetByteSize() > 0) { 213 const int regcount = m_reg_info_sp->GetNumRegisters(); 214 for (int i = 0; i < regcount; i++) { 215 struct RegisterInfo *reginfo = 216 m_reg_info_sp->GetRegisterInfoAtIndex(i); 217 if (reginfo->byte_offset + reginfo->byte_size <= 218 buffer_sp->GetByteSize()) { 219 m_reg_valid[i] = true; 220 } else { 221 m_reg_valid[i] = false; 222 } 223 } 224 return true; 225 } else { 226 Log *log(ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet(GDBR_LOG_THREAD | 227 GDBR_LOG_PACKETS)); 228 LLDB_LOGF( 229 log, 230 "error: GDBRemoteRegisterContext::ReadRegisterBytes tried " 231 "to read the " 232 "entire register context at once, expected at least %" PRId64 233 " bytes " 234 "but only got %" PRId64 " bytes.", 235 m_reg_data.GetByteSize(), buffer_sp->GetByteSize()); 236 } 237 } 238 return false; 239 } 240 if (reg_info->value_regs) { 241 // Process this composite register request by delegating to the 242 // constituent primordial registers. 243 244 // Index of the primordial register. 245 bool success = true; 246 for (uint32_t idx = 0; success; ++idx) { 247 const uint32_t prim_reg = reg_info->value_regs[idx]; 248 if (prim_reg == LLDB_INVALID_REGNUM) 249 break; 250 // We have a valid primordial register as our constituent. Grab the 251 // corresponding register info. 252 const RegisterInfo *prim_reg_info = GetRegisterInfoAtIndex(prim_reg); 253 if (prim_reg_info == nullptr) 254 success = false; 255 else { 256 // Read the containing register if it hasn't already been read 257 if (!GetRegisterIsValid(prim_reg)) 258 success = GetPrimordialRegister(prim_reg_info, gdb_comm); 259 } 260 } 261 262 if (success) { 263 // If we reach this point, all primordial register requests have 264 // succeeded. Validate this composite register. 265 SetRegisterIsValid(reg_info, true); 266 } 267 } else { 268 // Get each register individually 269 GetPrimordialRegister(reg_info, gdb_comm); 270 } 271 272 // Make sure we got a valid register value after reading it 273 if (!GetRegisterIsValid(reg)) 274 return false; 275 } 276 277 if (&data != &m_reg_data) { 278 assert(m_reg_data.GetByteSize() >= 279 reg_info->byte_offset + reg_info->byte_size); 280 // If our register context and our register info disagree, which should 281 // never happen, don't read past the end of the buffer. 282 if (m_reg_data.GetByteSize() < reg_info->byte_offset + reg_info->byte_size) 283 return false; 284 285 // If we aren't extracting into our own buffer (which only happens when 286 // this function is called from ReadRegisterValue(uint32_t, Scalar&)) then 287 // we transfer bytes from our buffer into the data buffer that was passed 288 // in 289 290 data.SetByteOrder(m_reg_data.GetByteOrder()); 291 data.SetData(m_reg_data, reg_info->byte_offset, reg_info->byte_size); 292 } 293 return true; 294 } 295 296 bool GDBRemoteRegisterContext::WriteRegister(const RegisterInfo *reg_info, 297 const RegisterValue &value) { 298 DataExtractor data; 299 if (value.GetData(data)) 300 return WriteRegisterBytes(reg_info, data, 0); 301 return false; 302 } 303 304 // Helper function for GDBRemoteRegisterContext::WriteRegisterBytes(). 305 bool GDBRemoteRegisterContext::SetPrimordialRegister( 306 const RegisterInfo *reg_info, GDBRemoteCommunicationClient &gdb_comm) { 307 StreamString packet; 308 StringExtractorGDBRemote response; 309 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; 310 // Invalidate just this register 311 SetRegisterIsValid(reg, false); 312 313 return gdb_comm.WriteRegister( 314 m_thread.GetProtocolID(), reg_info->kinds[eRegisterKindProcessPlugin], 315 {m_reg_data.PeekData(reg_info->byte_offset, reg_info->byte_size), 316 reg_info->byte_size}); 317 } 318 319 bool GDBRemoteRegisterContext::WriteRegisterBytes(const RegisterInfo *reg_info, 320 DataExtractor &data, 321 uint32_t data_offset) { 322 ExecutionContext exe_ctx(CalculateThread()); 323 324 Process *process = exe_ctx.GetProcessPtr(); 325 Thread *thread = exe_ctx.GetThreadPtr(); 326 if (process == nullptr || thread == nullptr) 327 return false; 328 329 GDBRemoteCommunicationClient &gdb_comm( 330 ((ProcessGDBRemote *)process)->GetGDBRemote()); 331 332 assert(m_reg_data.GetByteSize() >= 333 reg_info->byte_offset + reg_info->byte_size); 334 335 // If our register context and our register info disagree, which should never 336 // happen, don't overwrite past the end of the buffer. 337 if (m_reg_data.GetByteSize() < reg_info->byte_offset + reg_info->byte_size) 338 return false; 339 340 // Grab a pointer to where we are going to put this register 341 uint8_t *dst = const_cast<uint8_t *>( 342 m_reg_data.PeekData(reg_info->byte_offset, reg_info->byte_size)); 343 344 if (dst == nullptr) 345 return false; 346 347 // Code below is specific to AArch64 target in SVE state 348 // If vector granule (vg) register is being written then thread's 349 // register context reconfiguration is triggered on success. 350 bool do_reconfigure_arm64_sve = false; 351 const ArchSpec &arch = process->GetTarget().GetArchitecture(); 352 if (arch.IsValid() && arch.GetTriple().isAArch64()) 353 if (strcmp(reg_info->name, "vg") == 0) 354 do_reconfigure_arm64_sve = true; 355 356 if (data.CopyByteOrderedData(data_offset, // src offset 357 reg_info->byte_size, // src length 358 dst, // dst 359 reg_info->byte_size, // dst length 360 m_reg_data.GetByteOrder())) // dst byte order 361 { 362 GDBRemoteClientBase::Lock lock(gdb_comm, false); 363 if (lock) { 364 if (m_write_all_at_once) { 365 // Invalidate all register values 366 InvalidateIfNeeded(true); 367 368 // Set all registers in one packet 369 if (gdb_comm.WriteAllRegisters( 370 m_thread.GetProtocolID(), 371 {m_reg_data.GetDataStart(), size_t(m_reg_data.GetByteSize())})) 372 373 { 374 SetAllRegisterValid(false); 375 376 if (do_reconfigure_arm64_sve) 377 AArch64SVEReconfigure(); 378 379 return true; 380 } 381 } else { 382 bool success = true; 383 384 if (reg_info->value_regs) { 385 // This register is part of another register. In this case we read 386 // the actual register data for any "value_regs", and once all that 387 // data is read, we will have enough data in our register context 388 // bytes for the value of this register 389 390 // Invalidate this composite register first. 391 392 for (uint32_t idx = 0; success; ++idx) { 393 const uint32_t reg = reg_info->value_regs[idx]; 394 if (reg == LLDB_INVALID_REGNUM) 395 break; 396 // We have a valid primordial register as our constituent. Grab the 397 // corresponding register info. 398 const RegisterInfo *value_reg_info = GetRegisterInfoAtIndex(reg); 399 if (value_reg_info == nullptr) 400 success = false; 401 else 402 success = SetPrimordialRegister(value_reg_info, gdb_comm); 403 } 404 } else { 405 // This is an actual register, write it 406 success = SetPrimordialRegister(reg_info, gdb_comm); 407 408 if (success && do_reconfigure_arm64_sve) 409 AArch64SVEReconfigure(); 410 } 411 412 // Check if writing this register will invalidate any other register 413 // values? If so, invalidate them 414 if (reg_info->invalidate_regs) { 415 for (uint32_t idx = 0, reg = reg_info->invalidate_regs[0]; 416 reg != LLDB_INVALID_REGNUM; 417 reg = reg_info->invalidate_regs[++idx]) { 418 SetRegisterIsValid(reg, false); 419 } 420 } 421 422 return success; 423 } 424 } else { 425 Log *log(ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet(GDBR_LOG_THREAD | 426 GDBR_LOG_PACKETS)); 427 if (log) { 428 if (log->GetVerbose()) { 429 StreamString strm; 430 gdb_comm.DumpHistory(strm); 431 LLDB_LOGF(log, 432 "error: failed to get packet sequence mutex, not sending " 433 "write register for \"%s\":\n%s", 434 reg_info->name, strm.GetData()); 435 } else 436 LLDB_LOGF(log, 437 "error: failed to get packet sequence mutex, not sending " 438 "write register for \"%s\"", 439 reg_info->name); 440 } 441 } 442 } 443 return false; 444 } 445 446 bool GDBRemoteRegisterContext::ReadAllRegisterValues( 447 RegisterCheckpoint ®_checkpoint) { 448 ExecutionContext exe_ctx(CalculateThread()); 449 450 Process *process = exe_ctx.GetProcessPtr(); 451 Thread *thread = exe_ctx.GetThreadPtr(); 452 if (process == nullptr || thread == nullptr) 453 return false; 454 455 GDBRemoteCommunicationClient &gdb_comm( 456 ((ProcessGDBRemote *)process)->GetGDBRemote()); 457 458 uint32_t save_id = 0; 459 if (gdb_comm.SaveRegisterState(thread->GetProtocolID(), save_id)) { 460 reg_checkpoint.SetID(save_id); 461 reg_checkpoint.GetData().reset(); 462 return true; 463 } else { 464 reg_checkpoint.SetID(0); // Invalid save ID is zero 465 return ReadAllRegisterValues(reg_checkpoint.GetData()); 466 } 467 } 468 469 bool GDBRemoteRegisterContext::WriteAllRegisterValues( 470 const RegisterCheckpoint ®_checkpoint) { 471 uint32_t save_id = reg_checkpoint.GetID(); 472 if (save_id != 0) { 473 ExecutionContext exe_ctx(CalculateThread()); 474 475 Process *process = exe_ctx.GetProcessPtr(); 476 Thread *thread = exe_ctx.GetThreadPtr(); 477 if (process == nullptr || thread == nullptr) 478 return false; 479 480 GDBRemoteCommunicationClient &gdb_comm( 481 ((ProcessGDBRemote *)process)->GetGDBRemote()); 482 483 return gdb_comm.RestoreRegisterState(m_thread.GetProtocolID(), save_id); 484 } else { 485 return WriteAllRegisterValues(reg_checkpoint.GetData()); 486 } 487 } 488 489 bool GDBRemoteRegisterContext::ReadAllRegisterValues( 490 lldb::DataBufferSP &data_sp) { 491 ExecutionContext exe_ctx(CalculateThread()); 492 493 Process *process = exe_ctx.GetProcessPtr(); 494 Thread *thread = exe_ctx.GetThreadPtr(); 495 if (process == nullptr || thread == nullptr) 496 return false; 497 498 GDBRemoteCommunicationClient &gdb_comm( 499 ((ProcessGDBRemote *)process)->GetGDBRemote()); 500 501 const bool use_g_packet = 502 !gdb_comm.AvoidGPackets((ProcessGDBRemote *)process); 503 504 GDBRemoteClientBase::Lock lock(gdb_comm, false); 505 if (lock) { 506 if (gdb_comm.SyncThreadState(m_thread.GetProtocolID())) 507 InvalidateAllRegisters(); 508 509 if (use_g_packet && 510 (data_sp = gdb_comm.ReadAllRegisters(m_thread.GetProtocolID()))) 511 return true; 512 513 // We're going to read each register 514 // individually and store them as binary data in a buffer. 515 const RegisterInfo *reg_info; 516 517 for (uint32_t i = 0; (reg_info = GetRegisterInfoAtIndex(i)) != nullptr; 518 i++) { 519 if (reg_info 520 ->value_regs) // skip registers that are slices of real registers 521 continue; 522 ReadRegisterBytes(reg_info, m_reg_data); 523 // ReadRegisterBytes saves the contents of the register in to the 524 // m_reg_data buffer 525 } 526 data_sp = std::make_shared<DataBufferHeap>( 527 m_reg_data.GetDataStart(), m_reg_info_sp->GetRegisterDataByteSize()); 528 return true; 529 } else { 530 531 Log *log(ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet(GDBR_LOG_THREAD | 532 GDBR_LOG_PACKETS)); 533 if (log) { 534 if (log->GetVerbose()) { 535 StreamString strm; 536 gdb_comm.DumpHistory(strm); 537 LLDB_LOGF(log, 538 "error: failed to get packet sequence mutex, not sending " 539 "read all registers:\n%s", 540 strm.GetData()); 541 } else 542 LLDB_LOGF(log, 543 "error: failed to get packet sequence mutex, not sending " 544 "read all registers"); 545 } 546 } 547 548 data_sp.reset(); 549 return false; 550 } 551 552 bool GDBRemoteRegisterContext::WriteAllRegisterValues( 553 const lldb::DataBufferSP &data_sp) { 554 if (!data_sp || data_sp->GetBytes() == nullptr || data_sp->GetByteSize() == 0) 555 return false; 556 557 ExecutionContext exe_ctx(CalculateThread()); 558 559 Process *process = exe_ctx.GetProcessPtr(); 560 Thread *thread = exe_ctx.GetThreadPtr(); 561 if (process == nullptr || thread == nullptr) 562 return false; 563 564 GDBRemoteCommunicationClient &gdb_comm( 565 ((ProcessGDBRemote *)process)->GetGDBRemote()); 566 567 const bool use_g_packet = 568 !gdb_comm.AvoidGPackets((ProcessGDBRemote *)process); 569 570 GDBRemoteClientBase::Lock lock(gdb_comm, false); 571 if (lock) { 572 // The data_sp contains the G response packet. 573 if (use_g_packet) { 574 if (gdb_comm.WriteAllRegisters( 575 m_thread.GetProtocolID(), 576 {data_sp->GetBytes(), size_t(data_sp->GetByteSize())})) 577 return true; 578 579 uint32_t num_restored = 0; 580 // We need to manually go through all of the registers and restore them 581 // manually 582 DataExtractor restore_data(data_sp, m_reg_data.GetByteOrder(), 583 m_reg_data.GetAddressByteSize()); 584 585 const RegisterInfo *reg_info; 586 587 // The g packet contents may either include the slice registers 588 // (registers defined in terms of other registers, e.g. eax is a subset 589 // of rax) or not. The slice registers should NOT be in the g packet, 590 // but some implementations may incorrectly include them. 591 // 592 // If the slice registers are included in the packet, we must step over 593 // the slice registers when parsing the packet -- relying on the 594 // RegisterInfo byte_offset field would be incorrect. If the slice 595 // registers are not included, then using the byte_offset values into the 596 // data buffer is the best way to find individual register values. 597 598 uint64_t size_including_slice_registers = 0; 599 uint64_t size_not_including_slice_registers = 0; 600 uint64_t size_by_highest_offset = 0; 601 602 for (uint32_t reg_idx = 0; 603 (reg_info = GetRegisterInfoAtIndex(reg_idx)) != nullptr; ++reg_idx) { 604 size_including_slice_registers += reg_info->byte_size; 605 if (reg_info->value_regs == nullptr) 606 size_not_including_slice_registers += reg_info->byte_size; 607 if (reg_info->byte_offset >= size_by_highest_offset) 608 size_by_highest_offset = reg_info->byte_offset + reg_info->byte_size; 609 } 610 611 bool use_byte_offset_into_buffer; 612 if (size_by_highest_offset == restore_data.GetByteSize()) { 613 // The size of the packet agrees with the highest offset: + size in the 614 // register file 615 use_byte_offset_into_buffer = true; 616 } else if (size_not_including_slice_registers == 617 restore_data.GetByteSize()) { 618 // The size of the packet is the same as concatenating all of the 619 // registers sequentially, skipping the slice registers 620 use_byte_offset_into_buffer = true; 621 } else if (size_including_slice_registers == restore_data.GetByteSize()) { 622 // The slice registers are present in the packet (when they shouldn't 623 // be). Don't try to use the RegisterInfo byte_offset into the 624 // restore_data, it will point to the wrong place. 625 use_byte_offset_into_buffer = false; 626 } else { 627 // None of our expected sizes match the actual g packet data we're 628 // looking at. The most conservative approach here is to use the 629 // running total byte offset. 630 use_byte_offset_into_buffer = false; 631 } 632 633 // In case our register definitions don't include the correct offsets, 634 // keep track of the size of each reg & compute offset based on that. 635 uint32_t running_byte_offset = 0; 636 for (uint32_t reg_idx = 0; 637 (reg_info = GetRegisterInfoAtIndex(reg_idx)) != nullptr; 638 ++reg_idx, running_byte_offset += reg_info->byte_size) { 639 // Skip composite aka slice registers (e.g. eax is a slice of rax). 640 if (reg_info->value_regs) 641 continue; 642 643 const uint32_t reg = reg_info->kinds[eRegisterKindLLDB]; 644 645 uint32_t register_offset; 646 if (use_byte_offset_into_buffer) { 647 register_offset = reg_info->byte_offset; 648 } else { 649 register_offset = running_byte_offset; 650 } 651 652 const uint32_t reg_byte_size = reg_info->byte_size; 653 654 const uint8_t *restore_src = 655 restore_data.PeekData(register_offset, reg_byte_size); 656 if (restore_src) { 657 SetRegisterIsValid(reg, false); 658 if (gdb_comm.WriteRegister( 659 m_thread.GetProtocolID(), 660 reg_info->kinds[eRegisterKindProcessPlugin], 661 {restore_src, reg_byte_size})) 662 ++num_restored; 663 } 664 } 665 return num_restored > 0; 666 } else { 667 // For the use_g_packet == false case, we're going to write each register 668 // individually. The data buffer is binary data in this case, instead of 669 // ascii characters. 670 671 bool arm64_debugserver = false; 672 if (m_thread.GetProcess().get()) { 673 const ArchSpec &arch = 674 m_thread.GetProcess()->GetTarget().GetArchitecture(); 675 if (arch.IsValid() && (arch.GetMachine() == llvm::Triple::aarch64 || 676 arch.GetMachine() == llvm::Triple::aarch64_32) && 677 arch.GetTriple().getVendor() == llvm::Triple::Apple && 678 arch.GetTriple().getOS() == llvm::Triple::IOS) { 679 arm64_debugserver = true; 680 } 681 } 682 uint32_t num_restored = 0; 683 const RegisterInfo *reg_info; 684 for (uint32_t i = 0; (reg_info = GetRegisterInfoAtIndex(i)) != nullptr; 685 i++) { 686 if (reg_info->value_regs) // skip registers that are slices of real 687 // registers 688 continue; 689 // Skip the fpsr and fpcr floating point status/control register 690 // writing to work around a bug in an older version of debugserver that 691 // would lead to register context corruption when writing fpsr/fpcr. 692 if (arm64_debugserver && (strcmp(reg_info->name, "fpsr") == 0 || 693 strcmp(reg_info->name, "fpcr") == 0)) { 694 continue; 695 } 696 697 SetRegisterIsValid(reg_info, false); 698 if (gdb_comm.WriteRegister(m_thread.GetProtocolID(), 699 reg_info->kinds[eRegisterKindProcessPlugin], 700 {data_sp->GetBytes() + reg_info->byte_offset, 701 reg_info->byte_size})) 702 ++num_restored; 703 } 704 return num_restored > 0; 705 } 706 } else { 707 Log *log(ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet(GDBR_LOG_THREAD | 708 GDBR_LOG_PACKETS)); 709 if (log) { 710 if (log->GetVerbose()) { 711 StreamString strm; 712 gdb_comm.DumpHistory(strm); 713 LLDB_LOGF(log, 714 "error: failed to get packet sequence mutex, not sending " 715 "write all registers:\n%s", 716 strm.GetData()); 717 } else 718 LLDB_LOGF(log, 719 "error: failed to get packet sequence mutex, not sending " 720 "write all registers"); 721 } 722 } 723 return false; 724 } 725 726 uint32_t GDBRemoteRegisterContext::ConvertRegisterKindToRegisterNumber( 727 lldb::RegisterKind kind, uint32_t num) { 728 return m_reg_info_sp->ConvertRegisterKindToRegisterNumber(kind, num); 729 } 730 731 bool GDBRemoteRegisterContext::AArch64SVEReconfigure() { 732 if (!m_reg_info_sp) 733 return false; 734 735 const RegisterInfo *reg_info = m_reg_info_sp->GetRegisterInfo("vg"); 736 if (!reg_info) 737 return false; 738 739 uint64_t fail_value = LLDB_INVALID_ADDRESS; 740 uint32_t vg_reg_num = reg_info->kinds[eRegisterKindLLDB]; 741 uint64_t vg_reg_value = ReadRegisterAsUnsigned(vg_reg_num, fail_value); 742 743 if (vg_reg_value != fail_value && vg_reg_value <= 32) { 744 const RegisterInfo *reg_info = m_reg_info_sp->GetRegisterInfo("p0"); 745 if (!reg_info || vg_reg_value == reg_info->byte_size) 746 return false; 747 748 if (m_reg_info_sp->UpdateARM64SVERegistersInfos(vg_reg_value)) { 749 // Make a heap based buffer that is big enough to store all registers 750 m_reg_data.SetData(std::make_shared<DataBufferHeap>( 751 m_reg_info_sp->GetRegisterDataByteSize(), 0)); 752 m_reg_data.SetByteOrder(GetByteOrder()); 753 754 InvalidateAllRegisters(); 755 756 return true; 757 } 758 } 759 760 return false; 761 } 762 763 bool GDBRemoteDynamicRegisterInfo::UpdateARM64SVERegistersInfos(uint64_t vg) { 764 // SVE Z register size is vg x 8 bytes. 765 uint32_t z_reg_byte_size = vg * 8; 766 767 // SVE vector length has changed, accordingly set size of Z, P and FFR 768 // registers. Also invalidate register offsets it will be recalculated 769 // after SVE register size update. 770 for (auto ® : m_regs) { 771 if (reg.value_regs == nullptr) { 772 if (reg.name[0] == 'z' && isdigit(reg.name[1])) 773 reg.byte_size = z_reg_byte_size; 774 else if (reg.name[0] == 'p' && isdigit(reg.name[1])) 775 reg.byte_size = vg; 776 else if (strcmp(reg.name, "ffr") == 0) 777 reg.byte_size = vg; 778 } 779 reg.byte_offset = LLDB_INVALID_INDEX32; 780 } 781 782 // Re-calculate register offsets 783 ConfigureOffsets(); 784 return true; 785 } 786 787 void GDBRemoteDynamicRegisterInfo::HardcodeARMRegisters(bool from_scratch) { 788 // For Advanced SIMD and VFP register mapping. 789 static uint32_t g_d0_regs[] = {26, 27, LLDB_INVALID_REGNUM}; // (s0, s1) 790 static uint32_t g_d1_regs[] = {28, 29, LLDB_INVALID_REGNUM}; // (s2, s3) 791 static uint32_t g_d2_regs[] = {30, 31, LLDB_INVALID_REGNUM}; // (s4, s5) 792 static uint32_t g_d3_regs[] = {32, 33, LLDB_INVALID_REGNUM}; // (s6, s7) 793 static uint32_t g_d4_regs[] = {34, 35, LLDB_INVALID_REGNUM}; // (s8, s9) 794 static uint32_t g_d5_regs[] = {36, 37, LLDB_INVALID_REGNUM}; // (s10, s11) 795 static uint32_t g_d6_regs[] = {38, 39, LLDB_INVALID_REGNUM}; // (s12, s13) 796 static uint32_t g_d7_regs[] = {40, 41, LLDB_INVALID_REGNUM}; // (s14, s15) 797 static uint32_t g_d8_regs[] = {42, 43, LLDB_INVALID_REGNUM}; // (s16, s17) 798 static uint32_t g_d9_regs[] = {44, 45, LLDB_INVALID_REGNUM}; // (s18, s19) 799 static uint32_t g_d10_regs[] = {46, 47, LLDB_INVALID_REGNUM}; // (s20, s21) 800 static uint32_t g_d11_regs[] = {48, 49, LLDB_INVALID_REGNUM}; // (s22, s23) 801 static uint32_t g_d12_regs[] = {50, 51, LLDB_INVALID_REGNUM}; // (s24, s25) 802 static uint32_t g_d13_regs[] = {52, 53, LLDB_INVALID_REGNUM}; // (s26, s27) 803 static uint32_t g_d14_regs[] = {54, 55, LLDB_INVALID_REGNUM}; // (s28, s29) 804 static uint32_t g_d15_regs[] = {56, 57, LLDB_INVALID_REGNUM}; // (s30, s31) 805 static uint32_t g_q0_regs[] = { 806 26, 27, 28, 29, LLDB_INVALID_REGNUM}; // (d0, d1) -> (s0, s1, s2, s3) 807 static uint32_t g_q1_regs[] = { 808 30, 31, 32, 33, LLDB_INVALID_REGNUM}; // (d2, d3) -> (s4, s5, s6, s7) 809 static uint32_t g_q2_regs[] = { 810 34, 35, 36, 37, LLDB_INVALID_REGNUM}; // (d4, d5) -> (s8, s9, s10, s11) 811 static uint32_t g_q3_regs[] = { 812 38, 39, 40, 41, LLDB_INVALID_REGNUM}; // (d6, d7) -> (s12, s13, s14, s15) 813 static uint32_t g_q4_regs[] = { 814 42, 43, 44, 45, LLDB_INVALID_REGNUM}; // (d8, d9) -> (s16, s17, s18, s19) 815 static uint32_t g_q5_regs[] = { 816 46, 47, 48, 49, 817 LLDB_INVALID_REGNUM}; // (d10, d11) -> (s20, s21, s22, s23) 818 static uint32_t g_q6_regs[] = { 819 50, 51, 52, 53, 820 LLDB_INVALID_REGNUM}; // (d12, d13) -> (s24, s25, s26, s27) 821 static uint32_t g_q7_regs[] = { 822 54, 55, 56, 57, 823 LLDB_INVALID_REGNUM}; // (d14, d15) -> (s28, s29, s30, s31) 824 static uint32_t g_q8_regs[] = {59, 60, LLDB_INVALID_REGNUM}; // (d16, d17) 825 static uint32_t g_q9_regs[] = {61, 62, LLDB_INVALID_REGNUM}; // (d18, d19) 826 static uint32_t g_q10_regs[] = {63, 64, LLDB_INVALID_REGNUM}; // (d20, d21) 827 static uint32_t g_q11_regs[] = {65, 66, LLDB_INVALID_REGNUM}; // (d22, d23) 828 static uint32_t g_q12_regs[] = {67, 68, LLDB_INVALID_REGNUM}; // (d24, d25) 829 static uint32_t g_q13_regs[] = {69, 70, LLDB_INVALID_REGNUM}; // (d26, d27) 830 static uint32_t g_q14_regs[] = {71, 72, LLDB_INVALID_REGNUM}; // (d28, d29) 831 static uint32_t g_q15_regs[] = {73, 74, LLDB_INVALID_REGNUM}; // (d30, d31) 832 833 // This is our array of composite registers, with each element coming from 834 // the above register mappings. 835 static uint32_t *g_composites[] = { 836 g_d0_regs, g_d1_regs, g_d2_regs, g_d3_regs, g_d4_regs, g_d5_regs, 837 g_d6_regs, g_d7_regs, g_d8_regs, g_d9_regs, g_d10_regs, g_d11_regs, 838 g_d12_regs, g_d13_regs, g_d14_regs, g_d15_regs, g_q0_regs, g_q1_regs, 839 g_q2_regs, g_q3_regs, g_q4_regs, g_q5_regs, g_q6_regs, g_q7_regs, 840 g_q8_regs, g_q9_regs, g_q10_regs, g_q11_regs, g_q12_regs, g_q13_regs, 841 g_q14_regs, g_q15_regs}; 842 843 // clang-format off 844 static RegisterInfo g_register_infos[] = { 845 // NAME ALT SZ OFF ENCODING FORMAT EH_FRAME DWARF GENERIC PROCESS PLUGIN LLDB VALUE REGS INVALIDATE REGS SIZE EXPR SIZE LEN 846 // ====== ====== === === ============= ========== =================== =================== ====================== ============= ==== ========== =============== ========= ======== 847 { "r0", "arg1", 4, 0, eEncodingUint, eFormatHex, { ehframe_r0, dwarf_r0, LLDB_REGNUM_GENERIC_ARG1,0, 0 }, nullptr, nullptr, nullptr, 0 }, 848 { "r1", "arg2", 4, 0, eEncodingUint, eFormatHex, { ehframe_r1, dwarf_r1, LLDB_REGNUM_GENERIC_ARG2,1, 1 }, nullptr, nullptr, nullptr, 0 }, 849 { "r2", "arg3", 4, 0, eEncodingUint, eFormatHex, { ehframe_r2, dwarf_r2, LLDB_REGNUM_GENERIC_ARG3,2, 2 }, nullptr, nullptr, nullptr, 0 }, 850 { "r3", "arg4", 4, 0, eEncodingUint, eFormatHex, { ehframe_r3, dwarf_r3, LLDB_REGNUM_GENERIC_ARG4,3, 3 }, nullptr, nullptr, nullptr, 0 }, 851 { "r4", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r4, dwarf_r4, LLDB_INVALID_REGNUM, 4, 4 }, nullptr, nullptr, nullptr, 0 }, 852 { "r5", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r5, dwarf_r5, LLDB_INVALID_REGNUM, 5, 5 }, nullptr, nullptr, nullptr, 0 }, 853 { "r6", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r6, dwarf_r6, LLDB_INVALID_REGNUM, 6, 6 }, nullptr, nullptr, nullptr, 0 }, 854 { "r7", "fp", 4, 0, eEncodingUint, eFormatHex, { ehframe_r7, dwarf_r7, LLDB_REGNUM_GENERIC_FP, 7, 7 }, nullptr, nullptr, nullptr, 0 }, 855 { "r8", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r8, dwarf_r8, LLDB_INVALID_REGNUM, 8, 8 }, nullptr, nullptr, nullptr, 0 }, 856 { "r9", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r9, dwarf_r9, LLDB_INVALID_REGNUM, 9, 9 }, nullptr, nullptr, nullptr, 0 }, 857 { "r10", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r10, dwarf_r10, LLDB_INVALID_REGNUM, 10, 10 }, nullptr, nullptr, nullptr, 0 }, 858 { "r11", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r11, dwarf_r11, LLDB_INVALID_REGNUM, 11, 11 }, nullptr, nullptr, nullptr, 0 }, 859 { "r12", nullptr, 4, 0, eEncodingUint, eFormatHex, { ehframe_r12, dwarf_r12, LLDB_INVALID_REGNUM, 12, 12 }, nullptr, nullptr, nullptr, 0 }, 860 { "sp", "r13", 4, 0, eEncodingUint, eFormatHex, { ehframe_sp, dwarf_sp, LLDB_REGNUM_GENERIC_SP, 13, 13 }, nullptr, nullptr, nullptr, 0 }, 861 { "lr", "r14", 4, 0, eEncodingUint, eFormatHex, { ehframe_lr, dwarf_lr, LLDB_REGNUM_GENERIC_RA, 14, 14 }, nullptr, nullptr, nullptr, 0 }, 862 { "pc", "r15", 4, 0, eEncodingUint, eFormatHex, { ehframe_pc, dwarf_pc, LLDB_REGNUM_GENERIC_PC, 15, 15 }, nullptr, nullptr, nullptr, 0 }, 863 { "f0", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 16, 16 }, nullptr, nullptr, nullptr, 0 }, 864 { "f1", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 17, 17 }, nullptr, nullptr, nullptr, 0 }, 865 { "f2", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 18, 18 }, nullptr, nullptr, nullptr, 0 }, 866 { "f3", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 19, 19 }, nullptr, nullptr, nullptr, 0 }, 867 { "f4", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 20, 20 }, nullptr, nullptr, nullptr, 0 }, 868 { "f5", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 21, 21 }, nullptr, nullptr, nullptr, 0 }, 869 { "f6", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 22, 22 }, nullptr, nullptr, nullptr, 0 }, 870 { "f7", nullptr, 12, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 23, 23 }, nullptr, nullptr, nullptr, 0 }, 871 { "fps", nullptr, 4, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 24, 24 }, nullptr, nullptr, nullptr, 0 }, 872 { "cpsr","flags", 4, 0, eEncodingUint, eFormatHex, { ehframe_cpsr, dwarf_cpsr, LLDB_INVALID_REGNUM, 25, 25 }, nullptr, nullptr, nullptr, 0 }, 873 { "s0", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s0, LLDB_INVALID_REGNUM, 26, 26 }, nullptr, nullptr, nullptr, 0 }, 874 { "s1", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s1, LLDB_INVALID_REGNUM, 27, 27 }, nullptr, nullptr, nullptr, 0 }, 875 { "s2", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s2, LLDB_INVALID_REGNUM, 28, 28 }, nullptr, nullptr, nullptr, 0 }, 876 { "s3", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s3, LLDB_INVALID_REGNUM, 29, 29 }, nullptr, nullptr, nullptr, 0 }, 877 { "s4", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s4, LLDB_INVALID_REGNUM, 30, 30 }, nullptr, nullptr, nullptr, 0 }, 878 { "s5", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s5, LLDB_INVALID_REGNUM, 31, 31 }, nullptr, nullptr, nullptr, 0 }, 879 { "s6", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s6, LLDB_INVALID_REGNUM, 32, 32 }, nullptr, nullptr, nullptr, 0 }, 880 { "s7", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s7, LLDB_INVALID_REGNUM, 33, 33 }, nullptr, nullptr, nullptr, 0 }, 881 { "s8", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s8, LLDB_INVALID_REGNUM, 34, 34 }, nullptr, nullptr, nullptr, 0 }, 882 { "s9", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s9, LLDB_INVALID_REGNUM, 35, 35 }, nullptr, nullptr, nullptr, 0 }, 883 { "s10", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s10, LLDB_INVALID_REGNUM, 36, 36 }, nullptr, nullptr, nullptr, 0 }, 884 { "s11", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s11, LLDB_INVALID_REGNUM, 37, 37 }, nullptr, nullptr, nullptr, 0 }, 885 { "s12", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s12, LLDB_INVALID_REGNUM, 38, 38 }, nullptr, nullptr, nullptr, 0 }, 886 { "s13", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s13, LLDB_INVALID_REGNUM, 39, 39 }, nullptr, nullptr, nullptr, 0 }, 887 { "s14", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s14, LLDB_INVALID_REGNUM, 40, 40 }, nullptr, nullptr, nullptr, 0 }, 888 { "s15", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s15, LLDB_INVALID_REGNUM, 41, 41 }, nullptr, nullptr, nullptr, 0 }, 889 { "s16", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s16, LLDB_INVALID_REGNUM, 42, 42 }, nullptr, nullptr, nullptr, 0 }, 890 { "s17", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s17, LLDB_INVALID_REGNUM, 43, 43 }, nullptr, nullptr, nullptr, 0 }, 891 { "s18", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s18, LLDB_INVALID_REGNUM, 44, 44 }, nullptr, nullptr, nullptr, 0 }, 892 { "s19", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s19, LLDB_INVALID_REGNUM, 45, 45 }, nullptr, nullptr, nullptr, 0 }, 893 { "s20", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s20, LLDB_INVALID_REGNUM, 46, 46 }, nullptr, nullptr, nullptr, 0 }, 894 { "s21", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s21, LLDB_INVALID_REGNUM, 47, 47 }, nullptr, nullptr, nullptr, 0 }, 895 { "s22", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s22, LLDB_INVALID_REGNUM, 48, 48 }, nullptr, nullptr, nullptr, 0 }, 896 { "s23", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s23, LLDB_INVALID_REGNUM, 49, 49 }, nullptr, nullptr, nullptr, 0 }, 897 { "s24", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s24, LLDB_INVALID_REGNUM, 50, 50 }, nullptr, nullptr, nullptr, 0 }, 898 { "s25", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s25, LLDB_INVALID_REGNUM, 51, 51 }, nullptr, nullptr, nullptr, 0 }, 899 { "s26", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s26, LLDB_INVALID_REGNUM, 52, 52 }, nullptr, nullptr, nullptr, 0 }, 900 { "s27", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s27, LLDB_INVALID_REGNUM, 53, 53 }, nullptr, nullptr, nullptr, 0 }, 901 { "s28", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s28, LLDB_INVALID_REGNUM, 54, 54 }, nullptr, nullptr, nullptr, 0 }, 902 { "s29", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s29, LLDB_INVALID_REGNUM, 55, 55 }, nullptr, nullptr, nullptr, 0 }, 903 { "s30", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s30, LLDB_INVALID_REGNUM, 56, 56 }, nullptr, nullptr, nullptr, 0 }, 904 { "s31", nullptr, 4, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_s31, LLDB_INVALID_REGNUM, 57, 57 }, nullptr, nullptr, nullptr, 0 }, 905 { "fpscr",nullptr, 4, 0, eEncodingUint, eFormatHex, { LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, 58, 58 }, nullptr, nullptr, nullptr, 0 }, 906 { "d16", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d16, LLDB_INVALID_REGNUM, 59, 59 }, nullptr, nullptr, nullptr, 0 }, 907 { "d17", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d17, LLDB_INVALID_REGNUM, 60, 60 }, nullptr, nullptr, nullptr, 0 }, 908 { "d18", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d18, LLDB_INVALID_REGNUM, 61, 61 }, nullptr, nullptr, nullptr, 0 }, 909 { "d19", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d19, LLDB_INVALID_REGNUM, 62, 62 }, nullptr, nullptr, nullptr, 0 }, 910 { "d20", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d20, LLDB_INVALID_REGNUM, 63, 63 }, nullptr, nullptr, nullptr, 0 }, 911 { "d21", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d21, LLDB_INVALID_REGNUM, 64, 64 }, nullptr, nullptr, nullptr, 0 }, 912 { "d22", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d22, LLDB_INVALID_REGNUM, 65, 65 }, nullptr, nullptr, nullptr, 0 }, 913 { "d23", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d23, LLDB_INVALID_REGNUM, 66, 66 }, nullptr, nullptr, nullptr, 0 }, 914 { "d24", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d24, LLDB_INVALID_REGNUM, 67, 67 }, nullptr, nullptr, nullptr, 0 }, 915 { "d25", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d25, LLDB_INVALID_REGNUM, 68, 68 }, nullptr, nullptr, nullptr, 0 }, 916 { "d26", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d26, LLDB_INVALID_REGNUM, 69, 69 }, nullptr, nullptr, nullptr, 0 }, 917 { "d27", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d27, LLDB_INVALID_REGNUM, 70, 70 }, nullptr, nullptr, nullptr, 0 }, 918 { "d28", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d28, LLDB_INVALID_REGNUM, 71, 71 }, nullptr, nullptr, nullptr, 0 }, 919 { "d29", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d29, LLDB_INVALID_REGNUM, 72, 72 }, nullptr, nullptr, nullptr, 0 }, 920 { "d30", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d30, LLDB_INVALID_REGNUM, 73, 73 }, nullptr, nullptr, nullptr, 0 }, 921 { "d31", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d31, LLDB_INVALID_REGNUM, 74, 74 }, nullptr, nullptr, nullptr, 0 }, 922 { "d0", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d0, LLDB_INVALID_REGNUM, 75, 75 }, g_d0_regs, nullptr, nullptr, 0 }, 923 { "d1", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d1, LLDB_INVALID_REGNUM, 76, 76 }, g_d1_regs, nullptr, nullptr, 0 }, 924 { "d2", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d2, LLDB_INVALID_REGNUM, 77, 77 }, g_d2_regs, nullptr, nullptr, 0 }, 925 { "d3", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d3, LLDB_INVALID_REGNUM, 78, 78 }, g_d3_regs, nullptr, nullptr, 0 }, 926 { "d4", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d4, LLDB_INVALID_REGNUM, 79, 79 }, g_d4_regs, nullptr, nullptr, 0 }, 927 { "d5", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d5, LLDB_INVALID_REGNUM, 80, 80 }, g_d5_regs, nullptr, nullptr, 0 }, 928 { "d6", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d6, LLDB_INVALID_REGNUM, 81, 81 }, g_d6_regs, nullptr, nullptr, 0 }, 929 { "d7", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d7, LLDB_INVALID_REGNUM, 82, 82 }, g_d7_regs, nullptr, nullptr, 0 }, 930 { "d8", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d8, LLDB_INVALID_REGNUM, 83, 83 }, g_d8_regs, nullptr, nullptr, 0 }, 931 { "d9", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d9, LLDB_INVALID_REGNUM, 84, 84 }, g_d9_regs, nullptr, nullptr, 0 }, 932 { "d10", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d10, LLDB_INVALID_REGNUM, 85, 85 }, g_d10_regs, nullptr, nullptr, 0 }, 933 { "d11", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d11, LLDB_INVALID_REGNUM, 86, 86 }, g_d11_regs, nullptr, nullptr, 0 }, 934 { "d12", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d12, LLDB_INVALID_REGNUM, 87, 87 }, g_d12_regs, nullptr, nullptr, 0 }, 935 { "d13", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d13, LLDB_INVALID_REGNUM, 88, 88 }, g_d13_regs, nullptr, nullptr, 0 }, 936 { "d14", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d14, LLDB_INVALID_REGNUM, 89, 89 }, g_d14_regs, nullptr, nullptr, 0 }, 937 { "d15", nullptr, 8, 0, eEncodingIEEE754, eFormatFloat, { LLDB_INVALID_REGNUM, dwarf_d15, LLDB_INVALID_REGNUM, 90, 90 }, g_d15_regs, nullptr, nullptr, 0 }, 938 { "q0", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q0, LLDB_INVALID_REGNUM, 91, 91 }, g_q0_regs, nullptr, nullptr, 0 }, 939 { "q1", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q1, LLDB_INVALID_REGNUM, 92, 92 }, g_q1_regs, nullptr, nullptr, 0 }, 940 { "q2", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q2, LLDB_INVALID_REGNUM, 93, 93 }, g_q2_regs, nullptr, nullptr, 0 }, 941 { "q3", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q3, LLDB_INVALID_REGNUM, 94, 94 }, g_q3_regs, nullptr, nullptr, 0 }, 942 { "q4", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q4, LLDB_INVALID_REGNUM, 95, 95 }, g_q4_regs, nullptr, nullptr, 0 }, 943 { "q5", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q5, LLDB_INVALID_REGNUM, 96, 96 }, g_q5_regs, nullptr, nullptr, 0 }, 944 { "q6", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q6, LLDB_INVALID_REGNUM, 97, 97 }, g_q6_regs, nullptr, nullptr, 0 }, 945 { "q7", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q7, LLDB_INVALID_REGNUM, 98, 98 }, g_q7_regs, nullptr, nullptr, 0 }, 946 { "q8", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q8, LLDB_INVALID_REGNUM, 99, 99 }, g_q8_regs, nullptr, nullptr, 0 }, 947 { "q9", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q9, LLDB_INVALID_REGNUM, 100, 100 }, g_q9_regs, nullptr, nullptr, 0 }, 948 { "q10", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q10, LLDB_INVALID_REGNUM, 101, 101 }, g_q10_regs, nullptr, nullptr, 0 }, 949 { "q11", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q11, LLDB_INVALID_REGNUM, 102, 102 }, g_q11_regs, nullptr, nullptr, 0 }, 950 { "q12", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q12, LLDB_INVALID_REGNUM, 103, 103 }, g_q12_regs, nullptr, nullptr, 0 }, 951 { "q13", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q13, LLDB_INVALID_REGNUM, 104, 104 }, g_q13_regs, nullptr, nullptr, 0 }, 952 { "q14", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q14, LLDB_INVALID_REGNUM, 105, 105 }, g_q14_regs, nullptr, nullptr, 0 }, 953 { "q15", nullptr, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM, dwarf_q15, LLDB_INVALID_REGNUM, 106, 106 }, g_q15_regs, nullptr, nullptr, 0 } 954 }; 955 // clang-format on 956 957 static const uint32_t num_registers = llvm::array_lengthof(g_register_infos); 958 static ConstString gpr_reg_set("General Purpose Registers"); 959 static ConstString sfp_reg_set("Software Floating Point Registers"); 960 static ConstString vfp_reg_set("Floating Point Registers"); 961 size_t i; 962 if (from_scratch) { 963 // Calculate the offsets of the registers 964 // Note that the layout of the "composite" registers (d0-d15 and q0-q15) 965 // which comes after the "primordial" registers is important. This enables 966 // us to calculate the offset of the composite register by using the offset 967 // of its first primordial register. For example, to calculate the offset 968 // of q0, use s0's offset. 969 if (g_register_infos[2].byte_offset == 0) { 970 uint32_t byte_offset = 0; 971 for (i = 0; i < num_registers; ++i) { 972 // For primordial registers, increment the byte_offset by the byte_size 973 // to arrive at the byte_offset for the next register. Otherwise, we 974 // have a composite register whose offset can be calculated by 975 // consulting the offset of its first primordial register. 976 if (!g_register_infos[i].value_regs) { 977 g_register_infos[i].byte_offset = byte_offset; 978 byte_offset += g_register_infos[i].byte_size; 979 } else { 980 const uint32_t first_primordial_reg = 981 g_register_infos[i].value_regs[0]; 982 g_register_infos[i].byte_offset = 983 g_register_infos[first_primordial_reg].byte_offset; 984 } 985 } 986 } 987 for (i = 0; i < num_registers; ++i) { 988 ConstString name; 989 ConstString alt_name; 990 if (g_register_infos[i].name && g_register_infos[i].name[0]) 991 name.SetCString(g_register_infos[i].name); 992 if (g_register_infos[i].alt_name && g_register_infos[i].alt_name[0]) 993 alt_name.SetCString(g_register_infos[i].alt_name); 994 995 if (i <= 15 || i == 25) 996 AddRegister(g_register_infos[i], name, alt_name, gpr_reg_set); 997 else if (i <= 24) 998 AddRegister(g_register_infos[i], name, alt_name, sfp_reg_set); 999 else 1000 AddRegister(g_register_infos[i], name, alt_name, vfp_reg_set); 1001 } 1002 } else { 1003 // Add composite registers to our primordial registers, then. 1004 const size_t num_composites = llvm::array_lengthof(g_composites); 1005 const size_t num_dynamic_regs = GetNumRegisters(); 1006 const size_t num_common_regs = num_registers - num_composites; 1007 RegisterInfo *g_comp_register_infos = g_register_infos + num_common_regs; 1008 1009 // First we need to validate that all registers that we already have match 1010 // the non composite regs. If so, then we can add the registers, else we 1011 // need to bail 1012 bool match = true; 1013 if (num_dynamic_regs == num_common_regs) { 1014 for (i = 0; match && i < num_dynamic_regs; ++i) { 1015 // Make sure all register names match 1016 if (m_regs[i].name && g_register_infos[i].name) { 1017 if (strcmp(m_regs[i].name, g_register_infos[i].name)) { 1018 match = false; 1019 break; 1020 } 1021 } 1022 1023 // Make sure all register byte sizes match 1024 if (m_regs[i].byte_size != g_register_infos[i].byte_size) { 1025 match = false; 1026 break; 1027 } 1028 } 1029 } else { 1030 // Wrong number of registers. 1031 match = false; 1032 } 1033 // If "match" is true, then we can add extra registers. 1034 if (match) { 1035 for (i = 0; i < num_composites; ++i) { 1036 ConstString name; 1037 ConstString alt_name; 1038 const uint32_t first_primordial_reg = 1039 g_comp_register_infos[i].value_regs[0]; 1040 const char *reg_name = g_register_infos[first_primordial_reg].name; 1041 if (reg_name && reg_name[0]) { 1042 for (uint32_t j = 0; j < num_dynamic_regs; ++j) { 1043 const RegisterInfo *reg_info = GetRegisterInfoAtIndex(j); 1044 // Find a matching primordial register info entry. 1045 if (reg_info && reg_info->name && 1046 ::strcasecmp(reg_info->name, reg_name) == 0) { 1047 // The name matches the existing primordial entry. Find and 1048 // assign the offset, and then add this composite register entry. 1049 g_comp_register_infos[i].byte_offset = reg_info->byte_offset; 1050 name.SetCString(g_comp_register_infos[i].name); 1051 AddRegister(g_comp_register_infos[i], name, alt_name, 1052 vfp_reg_set); 1053 } 1054 } 1055 } 1056 } 1057 } 1058 } 1059 } 1060