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