1 //===-- CommunicationKDP.cpp ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "CommunicationKDP.h" 11 12 #include <errno.h> 13 #include <limits.h> 14 #include <string.h> 15 16 17 #include "lldb/Core/DumpDataExtractor.h" 18 #include "lldb/Host/Host.h" 19 #include "lldb/Target/Process.h" 20 #include "lldb/Utility/DataBufferHeap.h" 21 #include "lldb/Utility/DataExtractor.h" 22 #include "lldb/Utility/FileSpec.h" 23 #include "lldb/Utility/Log.h" 24 #include "lldb/Utility/State.h" 25 #include "lldb/Utility/UUID.h" 26 27 #include "ProcessKDPLog.h" 28 29 using namespace lldb; 30 using namespace lldb_private; 31 32 //---------------------------------------------------------------------- 33 // CommunicationKDP constructor 34 //---------------------------------------------------------------------- 35 CommunicationKDP::CommunicationKDP(const char *comm_name) 36 : Communication(comm_name), m_addr_byte_size(4), 37 m_byte_order(eByteOrderLittle), m_packet_timeout(5), m_sequence_mutex(), 38 m_is_running(false), m_session_key(0u), m_request_sequence_id(0u), 39 m_exception_sequence_id(0u), m_kdp_version_version(0u), 40 m_kdp_version_feature(0u), m_kdp_hostinfo_cpu_mask(0u), 41 m_kdp_hostinfo_cpu_type(0u), m_kdp_hostinfo_cpu_subtype(0u) {} 42 43 //---------------------------------------------------------------------- 44 // Destructor 45 //---------------------------------------------------------------------- 46 CommunicationKDP::~CommunicationKDP() { 47 if (IsConnected()) { 48 Disconnect(); 49 } 50 } 51 52 bool CommunicationKDP::SendRequestPacket( 53 const PacketStreamType &request_packet) { 54 std::lock_guard<std::recursive_mutex> guard(m_sequence_mutex); 55 return SendRequestPacketNoLock(request_packet); 56 } 57 58 void CommunicationKDP::MakeRequestPacketHeader(CommandType request_type, 59 PacketStreamType &request_packet, 60 uint16_t request_length) { 61 request_packet.Clear(); 62 request_packet.PutHex8(request_type | 63 ePacketTypeRequest); // Set the request type 64 request_packet.PutHex8(m_request_sequence_id++); // Sequence number 65 request_packet.PutHex16( 66 request_length); // Length of the packet including this header 67 request_packet.PutHex32(m_session_key); // Session key 68 } 69 70 bool CommunicationKDP::SendRequestAndGetReply( 71 const CommandType command, const PacketStreamType &request_packet, 72 DataExtractor &reply_packet) { 73 if (IsRunning()) { 74 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 75 if (log) { 76 PacketStreamType log_strm; 77 DumpPacket(log_strm, request_packet.GetData(), request_packet.GetSize()); 78 log->Printf("error: kdp running, not sending packet: %.*s", 79 (uint32_t)log_strm.GetSize(), log_strm.GetData()); 80 } 81 return false; 82 } 83 84 std::lock_guard<std::recursive_mutex> guard(m_sequence_mutex); 85 #ifdef LLDB_CONFIGURATION_DEBUG 86 // NOTE: this only works for packets that are in native endian byte order 87 assert(request_packet.GetSize() == 88 *((const uint16_t *)(request_packet.GetData() + 2))); 89 #endif 90 lldb::offset_t offset = 1; 91 const uint32_t num_retries = 3; 92 for (uint32_t i = 0; i < num_retries; ++i) { 93 if (SendRequestPacketNoLock(request_packet)) { 94 const uint8_t request_sequence_id = (uint8_t)request_packet.GetData()[1]; 95 while (1) { 96 if (WaitForPacketWithTimeoutMicroSecondsNoLock( 97 reply_packet, 98 std::chrono::microseconds(GetPacketTimeout()).count())) { 99 offset = 0; 100 const uint8_t reply_command = reply_packet.GetU8(&offset); 101 const uint8_t reply_sequence_id = reply_packet.GetU8(&offset); 102 if (request_sequence_id == reply_sequence_id) { 103 // The sequent ID was correct, now verify we got the response we 104 // were looking for 105 if ((reply_command & eCommandTypeMask) == command) { 106 // Success 107 if (command == KDP_RESUMECPUS) 108 m_is_running.SetValue(true, eBroadcastAlways); 109 return true; 110 } else { 111 // Failed to get the correct response, bail 112 reply_packet.Clear(); 113 return false; 114 } 115 } else if (reply_sequence_id > request_sequence_id) { 116 // Sequence ID was greater than the sequence ID of the packet we 117 // sent, something is really wrong... 118 reply_packet.Clear(); 119 return false; 120 } else { 121 // The reply sequence ID was less than our current packet's 122 // sequence ID so we should keep trying to get a response because 123 // this was a response for a previous packet that we must have 124 // retried. 125 } 126 } else { 127 // Break and retry sending the packet as we didn't get a response due 128 // to timeout 129 break; 130 } 131 } 132 } 133 } 134 reply_packet.Clear(); 135 return false; 136 } 137 138 bool CommunicationKDP::SendRequestPacketNoLock( 139 const PacketStreamType &request_packet) { 140 if (IsConnected()) { 141 const char *packet_data = request_packet.GetData(); 142 const size_t packet_size = request_packet.GetSize(); 143 144 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 145 if (log) { 146 PacketStreamType log_strm; 147 DumpPacket(log_strm, packet_data, packet_size); 148 log->Printf("%.*s", (uint32_t)log_strm.GetSize(), log_strm.GetData()); 149 } 150 ConnectionStatus status = eConnectionStatusSuccess; 151 152 size_t bytes_written = Write(packet_data, packet_size, status, NULL); 153 154 if (bytes_written == packet_size) 155 return true; 156 157 if (log) 158 log->Printf("error: failed to send packet entire packet %" PRIu64 159 " of %" PRIu64 " bytes sent", 160 (uint64_t)bytes_written, (uint64_t)packet_size); 161 } 162 return false; 163 } 164 165 bool CommunicationKDP::GetSequenceMutex( 166 std::unique_lock<std::recursive_mutex> &lock) { 167 return (lock = std::unique_lock<std::recursive_mutex>(m_sequence_mutex, 168 std::try_to_lock)) 169 .owns_lock(); 170 } 171 172 bool CommunicationKDP::WaitForNotRunningPrivate( 173 const std::chrono::microseconds &timeout) { 174 return m_is_running.WaitForValueEqualTo(false, timeout); 175 } 176 177 size_t 178 CommunicationKDP::WaitForPacketWithTimeoutMicroSeconds(DataExtractor &packet, 179 uint32_t timeout_usec) { 180 std::lock_guard<std::recursive_mutex> guard(m_sequence_mutex); 181 return WaitForPacketWithTimeoutMicroSecondsNoLock(packet, timeout_usec); 182 } 183 184 size_t CommunicationKDP::WaitForPacketWithTimeoutMicroSecondsNoLock( 185 DataExtractor &packet, uint32_t timeout_usec) { 186 uint8_t buffer[8192]; 187 Status error; 188 189 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 190 191 // Check for a packet from our cache first without trying any reading... 192 if (CheckForPacket(NULL, 0, packet)) 193 return packet.GetByteSize(); 194 195 bool timed_out = false; 196 while (IsConnected() && !timed_out) { 197 lldb::ConnectionStatus status = eConnectionStatusNoConnection; 198 size_t bytes_read = Read(buffer, sizeof(buffer), 199 timeout_usec == UINT32_MAX 200 ? Timeout<std::micro>(llvm::None) 201 : std::chrono::microseconds(timeout_usec), 202 status, &error); 203 204 LLDB_LOGV(log, 205 "Read (buffer, sizeof(buffer), timeout_usec = 0x{0:x}, " 206 "status = {1}, error = {2}) => bytes_read = {4}", 207 timeout_usec, 208 Communication::ConnectionStatusAsCString(status), 209 error, bytes_read); 210 211 if (bytes_read > 0) { 212 if (CheckForPacket(buffer, bytes_read, packet)) 213 return packet.GetByteSize(); 214 } else { 215 switch (status) { 216 case eConnectionStatusInterrupted: 217 case eConnectionStatusTimedOut: 218 timed_out = true; 219 break; 220 case eConnectionStatusSuccess: 221 // printf ("status = success but error = %s\n", 222 // error.AsCString("<invalid>")); 223 break; 224 225 case eConnectionStatusEndOfFile: 226 case eConnectionStatusNoConnection: 227 case eConnectionStatusLostConnection: 228 case eConnectionStatusError: 229 Disconnect(); 230 break; 231 } 232 } 233 } 234 packet.Clear(); 235 return 0; 236 } 237 238 bool CommunicationKDP::CheckForPacket(const uint8_t *src, size_t src_len, 239 DataExtractor &packet) { 240 // Put the packet data into the buffer in a thread safe fashion 241 std::lock_guard<std::recursive_mutex> guard(m_bytes_mutex); 242 243 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 244 245 if (src && src_len > 0) { 246 if (log && log->GetVerbose()) { 247 PacketStreamType log_strm; 248 DumpHexBytes(&log_strm, src, src_len, UINT32_MAX, LLDB_INVALID_ADDRESS); 249 log->Printf("CommunicationKDP::%s adding %u bytes: %s", __FUNCTION__, 250 (uint32_t)src_len, log_strm.GetData()); 251 } 252 m_bytes.append((const char *)src, src_len); 253 } 254 255 // Make sure we at least have enough bytes for a packet header 256 const size_t bytes_available = m_bytes.size(); 257 if (bytes_available >= 8) { 258 packet.SetData(&m_bytes[0], bytes_available, m_byte_order); 259 lldb::offset_t offset = 0; 260 uint8_t reply_command = packet.GetU8(&offset); 261 switch (reply_command) { 262 case ePacketTypeRequest | KDP_EXCEPTION: 263 case ePacketTypeRequest | KDP_TERMINATION: 264 // We got an exception request, so be sure to send an ACK 265 { 266 PacketStreamType request_ack_packet(Stream::eBinary, m_addr_byte_size, 267 m_byte_order); 268 // Set the reply but and make the ACK packet 269 request_ack_packet.PutHex8(reply_command | ePacketTypeReply); 270 request_ack_packet.PutHex8(packet.GetU8(&offset)); 271 request_ack_packet.PutHex16(packet.GetU16(&offset)); 272 request_ack_packet.PutHex32(packet.GetU32(&offset)); 273 m_is_running.SetValue(false, eBroadcastAlways); 274 // Ack to the exception or termination 275 SendRequestPacketNoLock(request_ack_packet); 276 } 277 // Fall through to case below to get packet contents 278 LLVM_FALLTHROUGH; 279 case ePacketTypeReply | KDP_CONNECT: 280 case ePacketTypeReply | KDP_DISCONNECT: 281 case ePacketTypeReply | KDP_HOSTINFO: 282 case ePacketTypeReply | KDP_VERSION: 283 case ePacketTypeReply | KDP_MAXBYTES: 284 case ePacketTypeReply | KDP_READMEM: 285 case ePacketTypeReply | KDP_WRITEMEM: 286 case ePacketTypeReply | KDP_READREGS: 287 case ePacketTypeReply | KDP_WRITEREGS: 288 case ePacketTypeReply | KDP_LOAD: 289 case ePacketTypeReply | KDP_IMAGEPATH: 290 case ePacketTypeReply | KDP_SUSPEND: 291 case ePacketTypeReply | KDP_RESUMECPUS: 292 case ePacketTypeReply | KDP_BREAKPOINT_SET: 293 case ePacketTypeReply | KDP_BREAKPOINT_REMOVE: 294 case ePacketTypeReply | KDP_REGIONS: 295 case ePacketTypeReply | KDP_REATTACH: 296 case ePacketTypeReply | KDP_HOSTREBOOT: 297 case ePacketTypeReply | KDP_READMEM64: 298 case ePacketTypeReply | KDP_WRITEMEM64: 299 case ePacketTypeReply | KDP_BREAKPOINT_SET64: 300 case ePacketTypeReply | KDP_BREAKPOINT_REMOVE64: 301 case ePacketTypeReply | KDP_KERNELVERSION: 302 case ePacketTypeReply | KDP_READPHYSMEM64: 303 case ePacketTypeReply | KDP_WRITEPHYSMEM64: 304 case ePacketTypeReply | KDP_READIOPORT: 305 case ePacketTypeReply | KDP_WRITEIOPORT: 306 case ePacketTypeReply | KDP_READMSR64: 307 case ePacketTypeReply | KDP_WRITEMSR64: 308 case ePacketTypeReply | KDP_DUMPINFO: { 309 offset = 2; 310 const uint16_t length = packet.GetU16(&offset); 311 if (length <= bytes_available) { 312 // We have an entire packet ready, we need to copy the data bytes into 313 // a buffer that will be owned by the packet and erase the bytes from 314 // our communcation buffer "m_bytes" 315 packet.SetData(DataBufferSP(new DataBufferHeap(&m_bytes[0], length))); 316 m_bytes.erase(0, length); 317 318 if (log) { 319 PacketStreamType log_strm; 320 DumpPacket(log_strm, packet); 321 322 log->Printf("%.*s", (uint32_t)log_strm.GetSize(), log_strm.GetData()); 323 } 324 return true; 325 } 326 } break; 327 328 default: 329 // Unrecognized reply command byte, erase this byte and try to get back 330 // on track 331 if (log) 332 log->Printf("CommunicationKDP::%s: tossing junk byte: 0x%2.2x", 333 __FUNCTION__, (uint8_t)m_bytes[0]); 334 m_bytes.erase(0, 1); 335 break; 336 } 337 } 338 packet.Clear(); 339 return false; 340 } 341 342 bool CommunicationKDP::SendRequestConnect(uint16_t reply_port, 343 uint16_t exc_port, 344 const char *greeting) { 345 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 346 m_byte_order); 347 if (greeting == NULL) 348 greeting = ""; 349 350 const CommandType command = KDP_CONNECT; 351 // Length is 82 uint16_t and the length of the greeting C string with the 352 // terminating NULL 353 const uint32_t command_length = 8 + 2 + 2 + ::strlen(greeting) + 1; 354 MakeRequestPacketHeader(command, request_packet, command_length); 355 // Always send connect ports as little endian 356 request_packet.SetByteOrder(eByteOrderLittle); 357 request_packet.PutHex16(htons(reply_port)); 358 request_packet.PutHex16(htons(exc_port)); 359 request_packet.SetByteOrder(m_byte_order); 360 request_packet.PutCString(greeting); 361 DataExtractor reply_packet; 362 return SendRequestAndGetReply(command, request_packet, reply_packet); 363 } 364 365 void CommunicationKDP::ClearKDPSettings() { 366 m_request_sequence_id = 0; 367 m_kdp_version_version = 0; 368 m_kdp_version_feature = 0; 369 m_kdp_hostinfo_cpu_mask = 0; 370 m_kdp_hostinfo_cpu_type = 0; 371 m_kdp_hostinfo_cpu_subtype = 0; 372 } 373 374 bool CommunicationKDP::SendRequestReattach(uint16_t reply_port) { 375 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 376 m_byte_order); 377 const CommandType command = KDP_REATTACH; 378 // Length is 8 bytes for the header plus 2 bytes for the reply UDP port 379 const uint32_t command_length = 8 + 2; 380 MakeRequestPacketHeader(command, request_packet, command_length); 381 // Always send connect ports as little endian 382 request_packet.SetByteOrder(eByteOrderLittle); 383 request_packet.PutHex16(htons(reply_port)); 384 request_packet.SetByteOrder(m_byte_order); 385 DataExtractor reply_packet; 386 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 387 // Reset the sequence ID to zero for reattach 388 ClearKDPSettings(); 389 lldb::offset_t offset = 4; 390 m_session_key = reply_packet.GetU32(&offset); 391 return true; 392 } 393 return false; 394 } 395 396 uint32_t CommunicationKDP::GetVersion() { 397 if (!VersionIsValid()) 398 SendRequestVersion(); 399 return m_kdp_version_version; 400 } 401 402 uint32_t CommunicationKDP::GetFeatureFlags() { 403 if (!VersionIsValid()) 404 SendRequestVersion(); 405 return m_kdp_version_feature; 406 } 407 408 bool CommunicationKDP::SendRequestVersion() { 409 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 410 m_byte_order); 411 const CommandType command = KDP_VERSION; 412 const uint32_t command_length = 8; 413 MakeRequestPacketHeader(command, request_packet, command_length); 414 DataExtractor reply_packet; 415 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 416 lldb::offset_t offset = 8; 417 m_kdp_version_version = reply_packet.GetU32(&offset); 418 m_kdp_version_feature = reply_packet.GetU32(&offset); 419 return true; 420 } 421 return false; 422 } 423 424 uint32_t CommunicationKDP::GetCPUMask() { 425 if (!HostInfoIsValid()) 426 SendRequestHostInfo(); 427 return m_kdp_hostinfo_cpu_mask; 428 } 429 430 uint32_t CommunicationKDP::GetCPUType() { 431 if (!HostInfoIsValid()) 432 SendRequestHostInfo(); 433 return m_kdp_hostinfo_cpu_type; 434 } 435 436 uint32_t CommunicationKDP::GetCPUSubtype() { 437 if (!HostInfoIsValid()) 438 SendRequestHostInfo(); 439 return m_kdp_hostinfo_cpu_subtype; 440 } 441 442 lldb_private::UUID CommunicationKDP::GetUUID() { 443 UUID uuid; 444 if (GetKernelVersion() == NULL) 445 return uuid; 446 447 if (m_kernel_version.find("UUID=") == std::string::npos) 448 return uuid; 449 450 size_t p = m_kernel_version.find("UUID=") + strlen("UUID="); 451 std::string uuid_str = m_kernel_version.substr(p, 36); 452 if (uuid_str.size() < 32) 453 return uuid; 454 455 if (uuid.SetFromStringRef(uuid_str) == 0) { 456 UUID invalid_uuid; 457 return invalid_uuid; 458 } 459 460 return uuid; 461 } 462 463 bool CommunicationKDP::RemoteIsEFI() { 464 if (GetKernelVersion() == NULL) 465 return false; 466 return strncmp(m_kernel_version.c_str(), "EFI", 3) == 0; 467 } 468 469 bool CommunicationKDP::RemoteIsDarwinKernel() { 470 if (GetKernelVersion() == NULL) 471 return false; 472 return m_kernel_version.find("Darwin Kernel") != std::string::npos; 473 } 474 475 lldb::addr_t CommunicationKDP::GetLoadAddress() { 476 if (GetKernelVersion() == NULL) 477 return LLDB_INVALID_ADDRESS; 478 479 if (m_kernel_version.find("stext=") == std::string::npos) 480 return LLDB_INVALID_ADDRESS; 481 size_t p = m_kernel_version.find("stext=") + strlen("stext="); 482 if (m_kernel_version[p] != '0' || m_kernel_version[p + 1] != 'x') 483 return LLDB_INVALID_ADDRESS; 484 485 addr_t kernel_load_address; 486 errno = 0; 487 kernel_load_address = ::strtoul(m_kernel_version.c_str() + p, NULL, 16); 488 if (errno != 0 || kernel_load_address == 0) 489 return LLDB_INVALID_ADDRESS; 490 491 return kernel_load_address; 492 } 493 494 bool CommunicationKDP::SendRequestHostInfo() { 495 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 496 m_byte_order); 497 const CommandType command = KDP_HOSTINFO; 498 const uint32_t command_length = 8; 499 MakeRequestPacketHeader(command, request_packet, command_length); 500 DataExtractor reply_packet; 501 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 502 lldb::offset_t offset = 8; 503 m_kdp_hostinfo_cpu_mask = reply_packet.GetU32(&offset); 504 m_kdp_hostinfo_cpu_type = reply_packet.GetU32(&offset); 505 m_kdp_hostinfo_cpu_subtype = reply_packet.GetU32(&offset); 506 507 ArchSpec kernel_arch; 508 kernel_arch.SetArchitecture(eArchTypeMachO, m_kdp_hostinfo_cpu_type, 509 m_kdp_hostinfo_cpu_subtype); 510 511 m_addr_byte_size = kernel_arch.GetAddressByteSize(); 512 m_byte_order = kernel_arch.GetByteOrder(); 513 return true; 514 } 515 return false; 516 } 517 518 const char *CommunicationKDP::GetKernelVersion() { 519 if (m_kernel_version.empty()) 520 SendRequestKernelVersion(); 521 return m_kernel_version.c_str(); 522 } 523 524 bool CommunicationKDP::SendRequestKernelVersion() { 525 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 526 m_byte_order); 527 const CommandType command = KDP_KERNELVERSION; 528 const uint32_t command_length = 8; 529 MakeRequestPacketHeader(command, request_packet, command_length); 530 DataExtractor reply_packet; 531 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 532 const char *kernel_version_cstr = reply_packet.PeekCStr(8); 533 if (kernel_version_cstr && kernel_version_cstr[0]) 534 m_kernel_version.assign(kernel_version_cstr); 535 return true; 536 } 537 return false; 538 } 539 540 bool CommunicationKDP::SendRequestDisconnect() { 541 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 542 m_byte_order); 543 const CommandType command = KDP_DISCONNECT; 544 const uint32_t command_length = 8; 545 MakeRequestPacketHeader(command, request_packet, command_length); 546 DataExtractor reply_packet; 547 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 548 // Are we supposed to get a reply for disconnect? 549 } 550 ClearKDPSettings(); 551 return true; 552 } 553 554 uint32_t CommunicationKDP::SendRequestReadMemory(lldb::addr_t addr, void *dst, 555 uint32_t dst_len, 556 Status &error) { 557 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 558 m_byte_order); 559 bool use_64 = (GetVersion() >= 11); 560 uint32_t command_addr_byte_size = use_64 ? 8 : 4; 561 const CommandType command = use_64 ? KDP_READMEM64 : KDP_READMEM; 562 // Size is header + address size + uint32_t length 563 const uint32_t command_length = 8 + command_addr_byte_size + 4; 564 MakeRequestPacketHeader(command, request_packet, command_length); 565 request_packet.PutMaxHex64(addr, command_addr_byte_size); 566 request_packet.PutHex32(dst_len); 567 DataExtractor reply_packet; 568 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 569 lldb::offset_t offset = 8; 570 uint32_t kdp_error = reply_packet.GetU32(&offset); 571 uint32_t src_len = reply_packet.GetByteSize() - 12; 572 573 if (src_len > 0) { 574 const void *src = reply_packet.GetData(&offset, src_len); 575 if (src) { 576 ::memcpy(dst, src, src_len); 577 error.Clear(); 578 return src_len; 579 } 580 } 581 if (kdp_error) 582 error.SetErrorStringWithFormat("kdp read memory failed (error %u)", 583 kdp_error); 584 else 585 error.SetErrorString("kdp read memory failed"); 586 } else { 587 error.SetErrorString("failed to send packet"); 588 } 589 return 0; 590 } 591 592 uint32_t CommunicationKDP::SendRequestWriteMemory(lldb::addr_t addr, 593 const void *src, 594 uint32_t src_len, 595 Status &error) { 596 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 597 m_byte_order); 598 bool use_64 = (GetVersion() >= 11); 599 uint32_t command_addr_byte_size = use_64 ? 8 : 4; 600 const CommandType command = use_64 ? KDP_WRITEMEM64 : KDP_WRITEMEM; 601 // Size is header + address size + uint32_t length 602 const uint32_t command_length = 8 + command_addr_byte_size + 4 + src_len; 603 MakeRequestPacketHeader(command, request_packet, command_length); 604 request_packet.PutMaxHex64(addr, command_addr_byte_size); 605 request_packet.PutHex32(src_len); 606 request_packet.PutRawBytes(src, src_len); 607 608 DataExtractor reply_packet; 609 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 610 lldb::offset_t offset = 8; 611 uint32_t kdp_error = reply_packet.GetU32(&offset); 612 if (kdp_error) 613 error.SetErrorStringWithFormat("kdp write memory failed (error %u)", 614 kdp_error); 615 else { 616 error.Clear(); 617 return src_len; 618 } 619 } else { 620 error.SetErrorString("failed to send packet"); 621 } 622 return 0; 623 } 624 625 bool CommunicationKDP::SendRawRequest( 626 uint8_t command_byte, 627 const void *src, // Raw packet payload bytes 628 uint32_t src_len, // Raw packet payload length 629 DataExtractor &reply_packet, Status &error) { 630 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 631 m_byte_order); 632 // Size is header + address size + uint32_t length 633 const uint32_t command_length = 8 + src_len; 634 const CommandType command = (CommandType)command_byte; 635 MakeRequestPacketHeader(command, request_packet, command_length); 636 request_packet.PutRawBytes(src, src_len); 637 638 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 639 lldb::offset_t offset = 8; 640 uint32_t kdp_error = reply_packet.GetU32(&offset); 641 if (kdp_error && (command_byte != KDP_DUMPINFO)) 642 error.SetErrorStringWithFormat("request packet 0x%8.8x failed (error %u)", 643 command_byte, kdp_error); 644 else { 645 error.Clear(); 646 return true; 647 } 648 } else { 649 error.SetErrorString("failed to send packet"); 650 } 651 return false; 652 } 653 654 const char *CommunicationKDP::GetCommandAsCString(uint8_t command) { 655 switch (command) { 656 case KDP_CONNECT: 657 return "KDP_CONNECT"; 658 case KDP_DISCONNECT: 659 return "KDP_DISCONNECT"; 660 case KDP_HOSTINFO: 661 return "KDP_HOSTINFO"; 662 case KDP_VERSION: 663 return "KDP_VERSION"; 664 case KDP_MAXBYTES: 665 return "KDP_MAXBYTES"; 666 case KDP_READMEM: 667 return "KDP_READMEM"; 668 case KDP_WRITEMEM: 669 return "KDP_WRITEMEM"; 670 case KDP_READREGS: 671 return "KDP_READREGS"; 672 case KDP_WRITEREGS: 673 return "KDP_WRITEREGS"; 674 case KDP_LOAD: 675 return "KDP_LOAD"; 676 case KDP_IMAGEPATH: 677 return "KDP_IMAGEPATH"; 678 case KDP_SUSPEND: 679 return "KDP_SUSPEND"; 680 case KDP_RESUMECPUS: 681 return "KDP_RESUMECPUS"; 682 case KDP_EXCEPTION: 683 return "KDP_EXCEPTION"; 684 case KDP_TERMINATION: 685 return "KDP_TERMINATION"; 686 case KDP_BREAKPOINT_SET: 687 return "KDP_BREAKPOINT_SET"; 688 case KDP_BREAKPOINT_REMOVE: 689 return "KDP_BREAKPOINT_REMOVE"; 690 case KDP_REGIONS: 691 return "KDP_REGIONS"; 692 case KDP_REATTACH: 693 return "KDP_REATTACH"; 694 case KDP_HOSTREBOOT: 695 return "KDP_HOSTREBOOT"; 696 case KDP_READMEM64: 697 return "KDP_READMEM64"; 698 case KDP_WRITEMEM64: 699 return "KDP_WRITEMEM64"; 700 case KDP_BREAKPOINT_SET64: 701 return "KDP_BREAKPOINT64_SET"; 702 case KDP_BREAKPOINT_REMOVE64: 703 return "KDP_BREAKPOINT64_REMOVE"; 704 case KDP_KERNELVERSION: 705 return "KDP_KERNELVERSION"; 706 case KDP_READPHYSMEM64: 707 return "KDP_READPHYSMEM64"; 708 case KDP_WRITEPHYSMEM64: 709 return "KDP_WRITEPHYSMEM64"; 710 case KDP_READIOPORT: 711 return "KDP_READIOPORT"; 712 case KDP_WRITEIOPORT: 713 return "KDP_WRITEIOPORT"; 714 case KDP_READMSR64: 715 return "KDP_READMSR64"; 716 case KDP_WRITEMSR64: 717 return "KDP_WRITEMSR64"; 718 case KDP_DUMPINFO: 719 return "KDP_DUMPINFO"; 720 } 721 return NULL; 722 } 723 724 void CommunicationKDP::DumpPacket(Stream &s, const void *data, 725 uint32_t data_len) { 726 DataExtractor extractor(data, data_len, m_byte_order, m_addr_byte_size); 727 DumpPacket(s, extractor); 728 } 729 730 void CommunicationKDP::DumpPacket(Stream &s, const DataExtractor &packet) { 731 const char *error_desc = NULL; 732 if (packet.GetByteSize() < 8) { 733 error_desc = "error: invalid packet (too short): "; 734 } else { 735 lldb::offset_t offset = 0; 736 const uint8_t first_packet_byte = packet.GetU8(&offset); 737 const uint8_t sequence_id = packet.GetU8(&offset); 738 const uint16_t length = packet.GetU16(&offset); 739 const uint32_t key = packet.GetU32(&offset); 740 const CommandType command = ExtractCommand(first_packet_byte); 741 const char *command_name = GetCommandAsCString(command); 742 if (command_name) { 743 const bool is_reply = ExtractIsReply(first_packet_byte); 744 s.Printf("(running=%i) %s %24s: 0x%2.2x 0x%2.2x 0x%4.4x 0x%8.8x ", 745 IsRunning(), is_reply ? "<--" : "-->", command_name, 746 first_packet_byte, sequence_id, length, key); 747 748 if (is_reply) { 749 // Dump request reply packets 750 switch (command) { 751 // Commands that return a single 32 bit error 752 case KDP_CONNECT: 753 case KDP_WRITEMEM: 754 case KDP_WRITEMEM64: 755 case KDP_BREAKPOINT_SET: 756 case KDP_BREAKPOINT_REMOVE: 757 case KDP_BREAKPOINT_SET64: 758 case KDP_BREAKPOINT_REMOVE64: 759 case KDP_WRITEREGS: 760 case KDP_LOAD: 761 case KDP_WRITEIOPORT: 762 case KDP_WRITEMSR64: { 763 const uint32_t error = packet.GetU32(&offset); 764 s.Printf(" (error=0x%8.8x)", error); 765 } break; 766 767 case KDP_DISCONNECT: 768 case KDP_REATTACH: 769 case KDP_HOSTREBOOT: 770 case KDP_SUSPEND: 771 case KDP_RESUMECPUS: 772 case KDP_EXCEPTION: 773 case KDP_TERMINATION: 774 // No return value for the reply, just the header to ack 775 s.PutCString(" ()"); 776 break; 777 778 case KDP_HOSTINFO: { 779 const uint32_t cpu_mask = packet.GetU32(&offset); 780 const uint32_t cpu_type = packet.GetU32(&offset); 781 const uint32_t cpu_subtype = packet.GetU32(&offset); 782 s.Printf(" (cpu_mask=0x%8.8x, cpu_type=0x%8.8x, cpu_subtype=0x%8.8x)", 783 cpu_mask, cpu_type, cpu_subtype); 784 } break; 785 786 case KDP_VERSION: { 787 const uint32_t version = packet.GetU32(&offset); 788 const uint32_t feature = packet.GetU32(&offset); 789 s.Printf(" (version=0x%8.8x, feature=0x%8.8x)", version, feature); 790 } break; 791 792 case KDP_REGIONS: { 793 const uint32_t region_count = packet.GetU32(&offset); 794 s.Printf(" (count = %u", region_count); 795 for (uint32_t i = 0; i < region_count; ++i) { 796 const addr_t region_addr = packet.GetPointer(&offset); 797 const uint32_t region_size = packet.GetU32(&offset); 798 const uint32_t region_prot = packet.GetU32(&offset); 799 s.Printf("\n\tregion[%" PRIu64 "] = { range = [0x%16.16" PRIx64 800 " - 0x%16.16" PRIx64 "), size = 0x%8.8x, prot = %s }", 801 region_addr, region_addr, region_addr + region_size, 802 region_size, GetPermissionsAsCString(region_prot)); 803 } 804 } break; 805 806 case KDP_READMEM: 807 case KDP_READMEM64: 808 case KDP_READPHYSMEM64: { 809 const uint32_t error = packet.GetU32(&offset); 810 const uint32_t count = packet.GetByteSize() - offset; 811 s.Printf(" (error = 0x%8.8x:\n", error); 812 if (count > 0) 813 DumpDataExtractor(packet, 814 &s, // Stream to dump to 815 offset, // Offset within "packet" 816 eFormatBytesWithASCII, // Format to use 817 1, // Size of each item 818 // in bytes 819 count, // Number of items 820 16, // Number per line 821 m_last_read_memory_addr, // Don't show addresses 822 // before each line 823 0, 0); // No bitfields 824 } break; 825 826 case KDP_READREGS: { 827 const uint32_t error = packet.GetU32(&offset); 828 const uint32_t count = packet.GetByteSize() - offset; 829 s.Printf(" (error = 0x%8.8x regs:\n", error); 830 if (count > 0) 831 DumpDataExtractor(packet, 832 &s, // Stream to dump to 833 offset, // Offset within "packet" 834 eFormatHex, // Format to use 835 m_addr_byte_size, // Size of each item 836 // in bytes 837 count / m_addr_byte_size, // Number of items 838 16 / m_addr_byte_size, // Number per line 839 LLDB_INVALID_ADDRESS, 840 // Don't 841 // show addresses before 842 // each line 843 0, 0); // No bitfields 844 } break; 845 846 case KDP_KERNELVERSION: { 847 const char *kernel_version = packet.PeekCStr(8); 848 s.Printf(" (version = \"%s\")", kernel_version); 849 } break; 850 851 case KDP_MAXBYTES: { 852 const uint32_t max_bytes = packet.GetU32(&offset); 853 s.Printf(" (max_bytes = 0x%8.8x (%u))", max_bytes, max_bytes); 854 } break; 855 case KDP_IMAGEPATH: { 856 const char *path = packet.GetCStr(&offset); 857 s.Printf(" (path = \"%s\")", path); 858 } break; 859 860 case KDP_READIOPORT: 861 case KDP_READMSR64: { 862 const uint32_t error = packet.GetU32(&offset); 863 const uint32_t count = packet.GetByteSize() - offset; 864 s.Printf(" (error = 0x%8.8x io:\n", error); 865 if (count > 0) 866 DumpDataExtractor(packet, 867 &s, // Stream to dump to 868 offset, // Offset within "packet" 869 eFormatHex, // Format to use 870 1, // Size of each item in bytes 871 count, // Number of items 872 16, // Number per line 873 LLDB_INVALID_ADDRESS, // Don't show addresses 874 // before each line 875 0, 0); // No bitfields 876 } break; 877 case KDP_DUMPINFO: { 878 const uint32_t count = packet.GetByteSize() - offset; 879 s.Printf(" (count = %u, bytes = \n", count); 880 if (count > 0) 881 DumpDataExtractor(packet, 882 &s, // Stream to dump to 883 offset, // Offset within "packet" 884 eFormatHex, // Format to use 885 1, // Size of each item in 886 // bytes 887 count, // Number of items 888 16, // Number per line 889 LLDB_INVALID_ADDRESS, // Don't show addresses 890 // before each line 891 0, 0); // No bitfields 892 893 } break; 894 895 default: 896 s.Printf(" (add support for dumping this packet reply!!!"); 897 break; 898 } 899 } else { 900 // Dump request packets 901 switch (command) { 902 case KDP_CONNECT: { 903 const uint16_t reply_port = ntohs(packet.GetU16(&offset)); 904 const uint16_t exc_port = ntohs(packet.GetU16(&offset)); 905 s.Printf(" (reply_port = %u, exc_port = %u, greeting = \"%s\")", 906 reply_port, exc_port, packet.GetCStr(&offset)); 907 } break; 908 909 case KDP_DISCONNECT: 910 case KDP_HOSTREBOOT: 911 case KDP_HOSTINFO: 912 case KDP_VERSION: 913 case KDP_REGIONS: 914 case KDP_KERNELVERSION: 915 case KDP_MAXBYTES: 916 case KDP_IMAGEPATH: 917 case KDP_SUSPEND: 918 // No args, just the header in the request... 919 s.PutCString(" ()"); 920 break; 921 922 case KDP_RESUMECPUS: { 923 const uint32_t cpu_mask = packet.GetU32(&offset); 924 s.Printf(" (cpu_mask = 0x%8.8x)", cpu_mask); 925 } break; 926 927 case KDP_READMEM: { 928 const uint32_t addr = packet.GetU32(&offset); 929 const uint32_t size = packet.GetU32(&offset); 930 s.Printf(" (addr = 0x%8.8x, size = %u)", addr, size); 931 m_last_read_memory_addr = addr; 932 } break; 933 934 case KDP_WRITEMEM: { 935 const uint32_t addr = packet.GetU32(&offset); 936 const uint32_t size = packet.GetU32(&offset); 937 s.Printf(" (addr = 0x%8.8x, size = %u, bytes = \n", addr, size); 938 if (size > 0) 939 DumpHexBytes(&s, packet.GetData(&offset, size), size, 32, addr); 940 } break; 941 942 case KDP_READMEM64: { 943 const uint64_t addr = packet.GetU64(&offset); 944 const uint32_t size = packet.GetU32(&offset); 945 s.Printf(" (addr = 0x%16.16" PRIx64 ", size = %u)", addr, size); 946 m_last_read_memory_addr = addr; 947 } break; 948 949 case KDP_READPHYSMEM64: { 950 const uint64_t addr = packet.GetU64(&offset); 951 const uint32_t size = packet.GetU32(&offset); 952 const uint32_t lcpu = packet.GetU16(&offset); 953 s.Printf(" (addr = 0x%16.16llx, size = %u, lcpu = %u)", addr, size, 954 lcpu); 955 m_last_read_memory_addr = addr; 956 } break; 957 958 case KDP_WRITEMEM64: { 959 const uint64_t addr = packet.GetU64(&offset); 960 const uint32_t size = packet.GetU32(&offset); 961 s.Printf(" (addr = 0x%16.16" PRIx64 ", size = %u, bytes = \n", addr, 962 size); 963 if (size > 0) 964 DumpHexBytes(&s, packet.GetData(&offset, size), size, 32, addr); 965 } break; 966 967 case KDP_WRITEPHYSMEM64: { 968 const uint64_t addr = packet.GetU64(&offset); 969 const uint32_t size = packet.GetU32(&offset); 970 const uint32_t lcpu = packet.GetU16(&offset); 971 s.Printf(" (addr = 0x%16.16llx, size = %u, lcpu = %u, bytes = \n", 972 addr, size, lcpu); 973 if (size > 0) 974 DumpHexBytes(&s, packet.GetData(&offset, size), size, 32, addr); 975 } break; 976 977 case KDP_READREGS: { 978 const uint32_t cpu = packet.GetU32(&offset); 979 const uint32_t flavor = packet.GetU32(&offset); 980 s.Printf(" (cpu = %u, flavor = %u)", cpu, flavor); 981 } break; 982 983 case KDP_WRITEREGS: { 984 const uint32_t cpu = packet.GetU32(&offset); 985 const uint32_t flavor = packet.GetU32(&offset); 986 const uint32_t nbytes = packet.GetByteSize() - offset; 987 s.Printf(" (cpu = %u, flavor = %u, regs = \n", cpu, flavor); 988 if (nbytes > 0) 989 DumpDataExtractor(packet, 990 &s, // Stream to dump to 991 offset, // Offset within 992 // "packet" 993 eFormatHex, // Format to use 994 m_addr_byte_size, // Size of each item in 995 // bytes 996 nbytes / m_addr_byte_size, // Number of items 997 16 / m_addr_byte_size, // Number per line 998 LLDB_INVALID_ADDRESS, // Don't show addresses 999 // before each line 1000 0, 0); // No bitfields 1001 } break; 1002 1003 case KDP_BREAKPOINT_SET: 1004 case KDP_BREAKPOINT_REMOVE: { 1005 const uint32_t addr = packet.GetU32(&offset); 1006 s.Printf(" (addr = 0x%8.8x)", addr); 1007 } break; 1008 1009 case KDP_BREAKPOINT_SET64: 1010 case KDP_BREAKPOINT_REMOVE64: { 1011 const uint64_t addr = packet.GetU64(&offset); 1012 s.Printf(" (addr = 0x%16.16" PRIx64 ")", addr); 1013 } break; 1014 1015 case KDP_LOAD: { 1016 const char *path = packet.GetCStr(&offset); 1017 s.Printf(" (path = \"%s\")", path); 1018 } break; 1019 1020 case KDP_EXCEPTION: { 1021 const uint32_t count = packet.GetU32(&offset); 1022 1023 for (uint32_t i = 0; i < count; ++i) { 1024 const uint32_t cpu = packet.GetU32(&offset); 1025 const uint32_t exc = packet.GetU32(&offset); 1026 const uint32_t code = packet.GetU32(&offset); 1027 const uint32_t subcode = packet.GetU32(&offset); 1028 const char *exc_cstr = NULL; 1029 switch (exc) { 1030 case 1: 1031 exc_cstr = "EXC_BAD_ACCESS"; 1032 break; 1033 case 2: 1034 exc_cstr = "EXC_BAD_INSTRUCTION"; 1035 break; 1036 case 3: 1037 exc_cstr = "EXC_ARITHMETIC"; 1038 break; 1039 case 4: 1040 exc_cstr = "EXC_EMULATION"; 1041 break; 1042 case 5: 1043 exc_cstr = "EXC_SOFTWARE"; 1044 break; 1045 case 6: 1046 exc_cstr = "EXC_BREAKPOINT"; 1047 break; 1048 case 7: 1049 exc_cstr = "EXC_SYSCALL"; 1050 break; 1051 case 8: 1052 exc_cstr = "EXC_MACH_SYSCALL"; 1053 break; 1054 case 9: 1055 exc_cstr = "EXC_RPC_ALERT"; 1056 break; 1057 case 10: 1058 exc_cstr = "EXC_CRASH"; 1059 break; 1060 default: 1061 break; 1062 } 1063 1064 s.Printf("{ cpu = 0x%8.8x, exc = %s (%u), code = %u (0x%8.8x), " 1065 "subcode = %u (0x%8.8x)} ", 1066 cpu, exc_cstr, exc, code, code, subcode, subcode); 1067 } 1068 } break; 1069 1070 case KDP_TERMINATION: { 1071 const uint32_t term_code = packet.GetU32(&offset); 1072 const uint32_t exit_code = packet.GetU32(&offset); 1073 s.Printf(" (term_code = 0x%8.8x (%u), exit_code = 0x%8.8x (%u))", 1074 term_code, term_code, exit_code, exit_code); 1075 } break; 1076 1077 case KDP_REATTACH: { 1078 const uint16_t reply_port = ntohs(packet.GetU16(&offset)); 1079 s.Printf(" (reply_port = %u)", reply_port); 1080 } break; 1081 1082 case KDP_READMSR64: { 1083 const uint32_t address = packet.GetU32(&offset); 1084 const uint16_t lcpu = packet.GetU16(&offset); 1085 s.Printf(" (address=0x%8.8x, lcpu=0x%4.4x)", address, lcpu); 1086 } break; 1087 1088 case KDP_WRITEMSR64: { 1089 const uint32_t address = packet.GetU32(&offset); 1090 const uint16_t lcpu = packet.GetU16(&offset); 1091 const uint32_t nbytes = packet.GetByteSize() - offset; 1092 s.Printf(" (address=0x%8.8x, lcpu=0x%4.4x, nbytes=0x%8.8x)", lcpu, 1093 address, nbytes); 1094 if (nbytes > 0) 1095 DumpDataExtractor(packet, 1096 &s, // Stream to dump to 1097 offset, // Offset within "packet" 1098 eFormatHex, // Format to use 1099 1, // Size of each item in 1100 // bytes 1101 nbytes, // Number of items 1102 16, // Number per line 1103 LLDB_INVALID_ADDRESS, // Don't show addresses 1104 // before each line 1105 0, 0); // No bitfields 1106 } break; 1107 1108 case KDP_READIOPORT: { 1109 const uint16_t lcpu = packet.GetU16(&offset); 1110 const uint16_t address = packet.GetU16(&offset); 1111 const uint16_t nbytes = packet.GetU16(&offset); 1112 s.Printf(" (lcpu=0x%4.4x, address=0x%4.4x, nbytes=%u)", lcpu, address, 1113 nbytes); 1114 } break; 1115 1116 case KDP_WRITEIOPORT: { 1117 const uint16_t lcpu = packet.GetU16(&offset); 1118 const uint16_t address = packet.GetU16(&offset); 1119 const uint16_t nbytes = packet.GetU16(&offset); 1120 s.Printf(" (lcpu = %u, addr = 0x%4.4x, nbytes = %u, bytes = \n", lcpu, 1121 address, nbytes); 1122 if (nbytes > 0) 1123 DumpDataExtractor(packet, 1124 &s, // Stream to dump to 1125 offset, // Offset within "packet" 1126 eFormatHex, // Format to use 1127 1, // Size of each item in 1128 // bytes 1129 nbytes, // Number of items 1130 16, // Number per line 1131 LLDB_INVALID_ADDRESS, // Don't show addresses 1132 // before each line 1133 0, 0); // No bitfields 1134 } break; 1135 1136 case KDP_DUMPINFO: { 1137 const uint32_t count = packet.GetByteSize() - offset; 1138 s.Printf(" (count = %u, bytes = \n", count); 1139 if (count > 0) 1140 DumpDataExtractor(packet, 1141 &s, // Stream to dump to 1142 offset, // Offset within "packet" 1143 eFormatHex, // Format to use 1144 1, // Size of each item in bytes 1145 count, // Number of items 1146 16, // Number per line 1147 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 1148 0, 0); // No bitfields 1149 1150 } break; 1151 } 1152 } 1153 } else { 1154 error_desc = "error: invalid packet command: "; 1155 } 1156 } 1157 1158 if (error_desc) { 1159 s.PutCString(error_desc); 1160 1161 DumpDataExtractor(packet, 1162 &s, // Stream to dump to 1163 0, // Offset into "packet" 1164 eFormatBytes, // Dump as hex bytes 1165 1, // Size of each item is 1 for 1166 // single bytes 1167 packet.GetByteSize(), // Number of bytes 1168 UINT32_MAX, // Num bytes per line 1169 LLDB_INVALID_ADDRESS, // Base address 1170 0, 0); // Bitfield info set to not do 1171 // anything bitfield related 1172 } 1173 } 1174 1175 uint32_t CommunicationKDP::SendRequestReadRegisters(uint32_t cpu, 1176 uint32_t flavor, void *dst, 1177 uint32_t dst_len, 1178 Status &error) { 1179 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1180 m_byte_order); 1181 const CommandType command = KDP_READREGS; 1182 // Size is header + 4 byte cpu and 4 byte flavor 1183 const uint32_t command_length = 8 + 4 + 4; 1184 MakeRequestPacketHeader(command, request_packet, command_length); 1185 request_packet.PutHex32(cpu); 1186 request_packet.PutHex32(flavor); 1187 DataExtractor reply_packet; 1188 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 1189 lldb::offset_t offset = 8; 1190 uint32_t kdp_error = reply_packet.GetU32(&offset); 1191 uint32_t src_len = reply_packet.GetByteSize() - 12; 1192 1193 if (src_len > 0) { 1194 const uint32_t bytes_to_copy = std::min<uint32_t>(src_len, dst_len); 1195 const void *src = reply_packet.GetData(&offset, bytes_to_copy); 1196 if (src) { 1197 ::memcpy(dst, src, bytes_to_copy); 1198 error.Clear(); 1199 // Return the number of bytes we could have returned regardless if we 1200 // copied them or not, just so we know when things don't match up 1201 return src_len; 1202 } 1203 } 1204 if (kdp_error) 1205 error.SetErrorStringWithFormat( 1206 "failed to read kdp registers for cpu %u flavor %u (error %u)", cpu, 1207 flavor, kdp_error); 1208 else 1209 error.SetErrorStringWithFormat( 1210 "failed to read kdp registers for cpu %u flavor %u", cpu, flavor); 1211 } else { 1212 error.SetErrorString("failed to send packet"); 1213 } 1214 return 0; 1215 } 1216 1217 uint32_t CommunicationKDP::SendRequestWriteRegisters(uint32_t cpu, 1218 uint32_t flavor, 1219 const void *src, 1220 uint32_t src_len, 1221 Status &error) { 1222 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1223 m_byte_order); 1224 const CommandType command = KDP_WRITEREGS; 1225 // Size is header + 4 byte cpu and 4 byte flavor 1226 const uint32_t command_length = 8 + 4 + 4 + src_len; 1227 MakeRequestPacketHeader(command, request_packet, command_length); 1228 request_packet.PutHex32(cpu); 1229 request_packet.PutHex32(flavor); 1230 request_packet.Write(src, src_len); 1231 DataExtractor reply_packet; 1232 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 1233 lldb::offset_t offset = 8; 1234 uint32_t kdp_error = reply_packet.GetU32(&offset); 1235 if (kdp_error == 0) 1236 return src_len; 1237 error.SetErrorStringWithFormat( 1238 "failed to read kdp registers for cpu %u flavor %u (error %u)", cpu, 1239 flavor, kdp_error); 1240 } else { 1241 error.SetErrorString("failed to send packet"); 1242 } 1243 return 0; 1244 } 1245 1246 bool CommunicationKDP::SendRequestResume() { 1247 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1248 m_byte_order); 1249 const CommandType command = KDP_RESUMECPUS; 1250 const uint32_t command_length = 12; 1251 MakeRequestPacketHeader(command, request_packet, command_length); 1252 request_packet.PutHex32(GetCPUMask()); 1253 1254 DataExtractor reply_packet; 1255 return SendRequestAndGetReply(command, request_packet, reply_packet); 1256 } 1257 1258 bool CommunicationKDP::SendRequestBreakpoint(bool set, addr_t addr) { 1259 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1260 m_byte_order); 1261 bool use_64 = (GetVersion() >= 11); 1262 uint32_t command_addr_byte_size = use_64 ? 8 : 4; 1263 const CommandType command = 1264 set ? (use_64 ? KDP_BREAKPOINT_SET64 : KDP_BREAKPOINT_SET) 1265 : (use_64 ? KDP_BREAKPOINT_REMOVE64 : KDP_BREAKPOINT_REMOVE); 1266 1267 const uint32_t command_length = 8 + command_addr_byte_size; 1268 MakeRequestPacketHeader(command, request_packet, command_length); 1269 request_packet.PutMaxHex64(addr, command_addr_byte_size); 1270 1271 DataExtractor reply_packet; 1272 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 1273 lldb::offset_t offset = 8; 1274 uint32_t kdp_error = reply_packet.GetU32(&offset); 1275 if (kdp_error == 0) 1276 return true; 1277 } 1278 return false; 1279 } 1280 1281 bool CommunicationKDP::SendRequestSuspend() { 1282 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1283 m_byte_order); 1284 const CommandType command = KDP_SUSPEND; 1285 const uint32_t command_length = 8; 1286 MakeRequestPacketHeader(command, request_packet, command_length); 1287 DataExtractor reply_packet; 1288 return SendRequestAndGetReply(command, request_packet, reply_packet); 1289 } 1290