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 // C Includes 13 #include <errno.h> 14 #include <limits.h> 15 #include <string.h> 16 17 // C++ Includes 18 19 // Other libraries and framework includes 20 #include "lldb/Core/DataBufferHeap.h" 21 #include "lldb/Core/DataExtractor.h" 22 #include "lldb/Core/Log.h" 23 #include "lldb/Core/State.h" 24 #include "lldb/Core/UUID.h" 25 #include "lldb/Host/FileSpec.h" 26 #include "lldb/Host/Host.h" 27 #include "lldb/Target/Process.h" 28 29 // Project includes 30 #include "ProcessKDPLog.h" 31 32 using namespace lldb; 33 using namespace lldb_private; 34 35 //---------------------------------------------------------------------- 36 // CommunicationKDP constructor 37 //---------------------------------------------------------------------- 38 CommunicationKDP::CommunicationKDP(const char *comm_name) 39 : Communication(comm_name), m_addr_byte_size(4), 40 m_byte_order(eByteOrderLittle), m_packet_timeout(5), m_sequence_mutex(), 41 m_is_running(false), m_session_key(0u), m_request_sequence_id(0u), 42 m_exception_sequence_id(0u), m_kdp_version_version(0u), 43 m_kdp_version_feature(0u), m_kdp_hostinfo_cpu_mask(0u), 44 m_kdp_hostinfo_cpu_type(0u), m_kdp_hostinfo_cpu_subtype(0u) {} 45 46 //---------------------------------------------------------------------- 47 // Destructor 48 //---------------------------------------------------------------------- 49 CommunicationKDP::~CommunicationKDP() { 50 if (IsConnected()) { 51 Disconnect(); 52 } 53 } 54 55 bool CommunicationKDP::SendRequestPacket( 56 const PacketStreamType &request_packet) { 57 std::lock_guard<std::recursive_mutex> guard(m_sequence_mutex); 58 return SendRequestPacketNoLock(request_packet); 59 } 60 61 #if 0 62 typedef struct { 63 uint8_t request; // Either: CommandType | ePacketTypeRequest, or CommandType | ePacketTypeReply 64 uint8_t sequence; 65 uint16_t length; // Length of entire packet including this header 66 uint32_t key; // Session key 67 } kdp_hdr_t; 68 #endif 69 70 void CommunicationKDP::MakeRequestPacketHeader(CommandType request_type, 71 PacketStreamType &request_packet, 72 uint16_t request_length) { 73 request_packet.Clear(); 74 request_packet.PutHex8(request_type | 75 ePacketTypeRequest); // Set the request type 76 request_packet.PutHex8(m_request_sequence_id++); // Sequence number 77 request_packet.PutHex16( 78 request_length); // Length of the packet including this header 79 request_packet.PutHex32(m_session_key); // Session key 80 } 81 82 bool CommunicationKDP::SendRequestAndGetReply( 83 const CommandType command, const PacketStreamType &request_packet, 84 DataExtractor &reply_packet) { 85 if (IsRunning()) { 86 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 87 if (log) { 88 PacketStreamType log_strm; 89 DumpPacket(log_strm, request_packet.GetData(), request_packet.GetSize()); 90 log->Printf("error: kdp running, not sending packet: %.*s", 91 (uint32_t)log_strm.GetSize(), log_strm.GetData()); 92 } 93 return false; 94 } 95 96 std::lock_guard<std::recursive_mutex> guard(m_sequence_mutex); 97 #ifdef LLDB_CONFIGURATION_DEBUG 98 // NOTE: this only works for packets that are in native endian byte order 99 assert(request_packet.GetSize() == 100 *((uint16_t *)(request_packet.GetData() + 2))); 101 #endif 102 lldb::offset_t offset = 1; 103 const uint32_t num_retries = 3; 104 for (uint32_t i = 0; i < num_retries; ++i) { 105 if (SendRequestPacketNoLock(request_packet)) { 106 const uint8_t request_sequence_id = (uint8_t)request_packet.GetData()[1]; 107 while (1) { 108 if (WaitForPacketWithTimeoutMicroSecondsNoLock( 109 reply_packet, 110 std::chrono::microseconds(GetPacketTimeout()).count())) { 111 offset = 0; 112 const uint8_t reply_command = reply_packet.GetU8(&offset); 113 const uint8_t reply_sequence_id = reply_packet.GetU8(&offset); 114 if (request_sequence_id == reply_sequence_id) { 115 // The sequent ID was correct, now verify we got the response we 116 // were looking for 117 if ((reply_command & eCommandTypeMask) == command) { 118 // Success 119 if (command == KDP_RESUMECPUS) 120 m_is_running.SetValue(true, eBroadcastAlways); 121 return true; 122 } else { 123 // Failed to get the correct response, bail 124 reply_packet.Clear(); 125 return false; 126 } 127 } else if (reply_sequence_id > request_sequence_id) { 128 // Sequence ID was greater than the sequence ID of the packet we 129 // sent, something 130 // is really wrong... 131 reply_packet.Clear(); 132 return false; 133 } else { 134 // The reply sequence ID was less than our current packet's sequence 135 // ID 136 // so we should keep trying to get a response because this was a 137 // response 138 // for a previous packet that we must have retried. 139 } 140 } else { 141 // Break and retry sending the packet as we didn't get a response due 142 // to timeout 143 break; 144 } 145 } 146 } 147 } 148 reply_packet.Clear(); 149 return false; 150 } 151 152 bool CommunicationKDP::SendRequestPacketNoLock( 153 const PacketStreamType &request_packet) { 154 if (IsConnected()) { 155 const char *packet_data = request_packet.GetData(); 156 const size_t packet_size = request_packet.GetSize(); 157 158 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 159 if (log) { 160 PacketStreamType log_strm; 161 DumpPacket(log_strm, packet_data, packet_size); 162 log->Printf("%.*s", (uint32_t)log_strm.GetSize(), log_strm.GetData()); 163 } 164 ConnectionStatus status = eConnectionStatusSuccess; 165 166 size_t bytes_written = Write(packet_data, packet_size, status, NULL); 167 168 if (bytes_written == packet_size) 169 return true; 170 171 if (log) 172 log->Printf("error: failed to send packet entire packet %" PRIu64 173 " of %" PRIu64 " bytes sent", 174 (uint64_t)bytes_written, (uint64_t)packet_size); 175 } 176 return false; 177 } 178 179 bool CommunicationKDP::GetSequenceMutex( 180 std::unique_lock<std::recursive_mutex> &lock) { 181 return (lock = std::unique_lock<std::recursive_mutex>(m_sequence_mutex, 182 std::try_to_lock)) 183 .owns_lock(); 184 } 185 186 bool CommunicationKDP::WaitForNotRunningPrivate( 187 const std::chrono::microseconds &timeout) { 188 return m_is_running.WaitForValueEqualTo(false, timeout, NULL); 189 } 190 191 size_t 192 CommunicationKDP::WaitForPacketWithTimeoutMicroSeconds(DataExtractor &packet, 193 uint32_t timeout_usec) { 194 std::lock_guard<std::recursive_mutex> guard(m_sequence_mutex); 195 return WaitForPacketWithTimeoutMicroSecondsNoLock(packet, timeout_usec); 196 } 197 198 size_t CommunicationKDP::WaitForPacketWithTimeoutMicroSecondsNoLock( 199 DataExtractor &packet, uint32_t timeout_usec) { 200 uint8_t buffer[8192]; 201 Error error; 202 203 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 204 205 // Check for a packet from our cache first without trying any reading... 206 if (CheckForPacket(NULL, 0, packet)) 207 return packet.GetByteSize(); 208 209 bool timed_out = false; 210 while (IsConnected() && !timed_out) { 211 lldb::ConnectionStatus status = eConnectionStatusNoConnection; 212 size_t bytes_read = Read(buffer, sizeof(buffer), 213 timeout_usec == UINT32_MAX 214 ? Timeout<std::micro>(llvm::None) 215 : std::chrono::microseconds(timeout_usec), 216 status, &error); 217 218 LLDB_LOGV(log, 219 "Read (buffer, sizeof(buffer), timeout_usec = 0x{0:x}, " 220 "status = {1}, error = {2}) => bytes_read = {4}", 221 timeout_usec, 222 Communication::ConnectionStatusAsCString(status), 223 error, bytes_read); 224 225 if (bytes_read > 0) { 226 if (CheckForPacket(buffer, bytes_read, packet)) 227 return packet.GetByteSize(); 228 } else { 229 switch (status) { 230 case eConnectionStatusInterrupted: 231 case eConnectionStatusTimedOut: 232 timed_out = true; 233 break; 234 case eConnectionStatusSuccess: 235 // printf ("status = success but error = %s\n", 236 // error.AsCString("<invalid>")); 237 break; 238 239 case eConnectionStatusEndOfFile: 240 case eConnectionStatusNoConnection: 241 case eConnectionStatusLostConnection: 242 case eConnectionStatusError: 243 Disconnect(); 244 break; 245 } 246 } 247 } 248 packet.Clear(); 249 return 0; 250 } 251 252 bool CommunicationKDP::CheckForPacket(const uint8_t *src, size_t src_len, 253 DataExtractor &packet) { 254 // Put the packet data into the buffer in a thread safe fashion 255 std::lock_guard<std::recursive_mutex> guard(m_bytes_mutex); 256 257 Log *log(ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_PACKETS)); 258 259 if (src && src_len > 0) { 260 if (log && log->GetVerbose()) { 261 PacketStreamType log_strm; 262 DataExtractor::DumpHexBytes(&log_strm, src, src_len, UINT32_MAX, 263 LLDB_INVALID_ADDRESS); 264 log->Printf("CommunicationKDP::%s adding %u bytes: %s", __FUNCTION__, 265 (uint32_t)src_len, log_strm.GetData()); 266 } 267 m_bytes.append((const char *)src, src_len); 268 } 269 270 // Make sure we at least have enough bytes for a packet header 271 const size_t bytes_available = m_bytes.size(); 272 if (bytes_available >= 8) { 273 packet.SetData(&m_bytes[0], bytes_available, m_byte_order); 274 lldb::offset_t offset = 0; 275 uint8_t reply_command = packet.GetU8(&offset); 276 switch (reply_command) { 277 case ePacketTypeRequest | KDP_EXCEPTION: 278 case ePacketTypeRequest | KDP_TERMINATION: 279 // We got an exception request, so be sure to send an ACK 280 { 281 PacketStreamType request_ack_packet(Stream::eBinary, m_addr_byte_size, 282 m_byte_order); 283 // Set the reply but and make the ACK packet 284 request_ack_packet.PutHex8(reply_command | ePacketTypeReply); 285 request_ack_packet.PutHex8(packet.GetU8(&offset)); 286 request_ack_packet.PutHex16(packet.GetU16(&offset)); 287 request_ack_packet.PutHex32(packet.GetU32(&offset)); 288 m_is_running.SetValue(false, eBroadcastAlways); 289 // Ack to the exception or termination 290 SendRequestPacketNoLock(request_ack_packet); 291 } 292 // Fall through to case below to get packet contents 293 LLVM_FALLTHROUGH; 294 case ePacketTypeReply | KDP_CONNECT: 295 case ePacketTypeReply | KDP_DISCONNECT: 296 case ePacketTypeReply | KDP_HOSTINFO: 297 case ePacketTypeReply | KDP_VERSION: 298 case ePacketTypeReply | KDP_MAXBYTES: 299 case ePacketTypeReply | KDP_READMEM: 300 case ePacketTypeReply | KDP_WRITEMEM: 301 case ePacketTypeReply | KDP_READREGS: 302 case ePacketTypeReply | KDP_WRITEREGS: 303 case ePacketTypeReply | KDP_LOAD: 304 case ePacketTypeReply | KDP_IMAGEPATH: 305 case ePacketTypeReply | KDP_SUSPEND: 306 case ePacketTypeReply | KDP_RESUMECPUS: 307 case ePacketTypeReply | KDP_BREAKPOINT_SET: 308 case ePacketTypeReply | KDP_BREAKPOINT_REMOVE: 309 case ePacketTypeReply | KDP_REGIONS: 310 case ePacketTypeReply | KDP_REATTACH: 311 case ePacketTypeReply | KDP_HOSTREBOOT: 312 case ePacketTypeReply | KDP_READMEM64: 313 case ePacketTypeReply | KDP_WRITEMEM64: 314 case ePacketTypeReply | KDP_BREAKPOINT_SET64: 315 case ePacketTypeReply | KDP_BREAKPOINT_REMOVE64: 316 case ePacketTypeReply | KDP_KERNELVERSION: 317 case ePacketTypeReply | KDP_READPHYSMEM64: 318 case ePacketTypeReply | KDP_WRITEPHYSMEM64: 319 case ePacketTypeReply | KDP_READIOPORT: 320 case ePacketTypeReply | KDP_WRITEIOPORT: 321 case ePacketTypeReply | KDP_READMSR64: 322 case ePacketTypeReply | KDP_WRITEMSR64: 323 case ePacketTypeReply | KDP_DUMPINFO: { 324 offset = 2; 325 const uint16_t length = packet.GetU16(&offset); 326 if (length <= bytes_available) { 327 // We have an entire packet ready, we need to copy the data 328 // bytes into a buffer that will be owned by the packet and 329 // erase the bytes from our communcation buffer "m_bytes" 330 packet.SetData(DataBufferSP(new DataBufferHeap(&m_bytes[0], length))); 331 m_bytes.erase(0, length); 332 333 if (log) { 334 PacketStreamType log_strm; 335 DumpPacket(log_strm, packet); 336 337 log->Printf("%.*s", (uint32_t)log_strm.GetSize(), log_strm.GetData()); 338 } 339 return true; 340 } 341 } break; 342 343 default: 344 // Unrecognized reply command byte, erase this byte and try to get back on 345 // track 346 if (log) 347 log->Printf("CommunicationKDP::%s: tossing junk byte: 0x%2.2x", 348 __FUNCTION__, (uint8_t)m_bytes[0]); 349 m_bytes.erase(0, 1); 350 break; 351 } 352 } 353 packet.Clear(); 354 return false; 355 } 356 357 bool CommunicationKDP::SendRequestConnect(uint16_t reply_port, 358 uint16_t exc_port, 359 const char *greeting) { 360 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 361 m_byte_order); 362 if (greeting == NULL) 363 greeting = ""; 364 365 const CommandType command = KDP_CONNECT; 366 // Length is 82 uint16_t and the length of the greeting C string with the 367 // terminating NULL 368 const uint32_t command_length = 8 + 2 + 2 + ::strlen(greeting) + 1; 369 MakeRequestPacketHeader(command, request_packet, command_length); 370 // Always send connect ports as little endian 371 request_packet.SetByteOrder(eByteOrderLittle); 372 request_packet.PutHex16(htons(reply_port)); 373 request_packet.PutHex16(htons(exc_port)); 374 request_packet.SetByteOrder(m_byte_order); 375 request_packet.PutCString(greeting); 376 DataExtractor reply_packet; 377 return SendRequestAndGetReply(command, request_packet, reply_packet); 378 } 379 380 void CommunicationKDP::ClearKDPSettings() { 381 m_request_sequence_id = 0; 382 m_kdp_version_version = 0; 383 m_kdp_version_feature = 0; 384 m_kdp_hostinfo_cpu_mask = 0; 385 m_kdp_hostinfo_cpu_type = 0; 386 m_kdp_hostinfo_cpu_subtype = 0; 387 } 388 389 bool CommunicationKDP::SendRequestReattach(uint16_t reply_port) { 390 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 391 m_byte_order); 392 const CommandType command = KDP_REATTACH; 393 // Length is 8 bytes for the header plus 2 bytes for the reply UDP port 394 const uint32_t command_length = 8 + 2; 395 MakeRequestPacketHeader(command, request_packet, command_length); 396 // Always send connect ports as little endian 397 request_packet.SetByteOrder(eByteOrderLittle); 398 request_packet.PutHex16(htons(reply_port)); 399 request_packet.SetByteOrder(m_byte_order); 400 DataExtractor reply_packet; 401 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 402 // Reset the sequence ID to zero for reattach 403 ClearKDPSettings(); 404 lldb::offset_t offset = 4; 405 m_session_key = reply_packet.GetU32(&offset); 406 return true; 407 } 408 return false; 409 } 410 411 uint32_t CommunicationKDP::GetVersion() { 412 if (!VersionIsValid()) 413 SendRequestVersion(); 414 return m_kdp_version_version; 415 } 416 417 uint32_t CommunicationKDP::GetFeatureFlags() { 418 if (!VersionIsValid()) 419 SendRequestVersion(); 420 return m_kdp_version_feature; 421 } 422 423 bool CommunicationKDP::SendRequestVersion() { 424 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 425 m_byte_order); 426 const CommandType command = KDP_VERSION; 427 const uint32_t command_length = 8; 428 MakeRequestPacketHeader(command, request_packet, command_length); 429 DataExtractor reply_packet; 430 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 431 lldb::offset_t offset = 8; 432 m_kdp_version_version = reply_packet.GetU32(&offset); 433 m_kdp_version_feature = reply_packet.GetU32(&offset); 434 return true; 435 } 436 return false; 437 } 438 439 #if 0 // Disable KDP_IMAGEPATH for now, it seems to hang the KDP connection... 440 const char * 441 CommunicationKDP::GetImagePath () 442 { 443 if (m_image_path.empty()) 444 SendRequestImagePath(); 445 return m_image_path.c_str(); 446 } 447 448 bool 449 CommunicationKDP::SendRequestImagePath () 450 { 451 PacketStreamType request_packet (Stream::eBinary, m_addr_byte_size, m_byte_order); 452 const CommandType command = KDP_IMAGEPATH; 453 const uint32_t command_length = 8; 454 MakeRequestPacketHeader (command, request_packet, command_length); 455 DataExtractor reply_packet; 456 if (SendRequestAndGetReply (command, request_packet, reply_packet)) 457 { 458 const char *path = reply_packet.PeekCStr(8); 459 if (path && path[0]) 460 m_kernel_version.assign (path); 461 return true; 462 } 463 return false; 464 } 465 #endif 466 467 uint32_t CommunicationKDP::GetCPUMask() { 468 if (!HostInfoIsValid()) 469 SendRequestHostInfo(); 470 return m_kdp_hostinfo_cpu_mask; 471 } 472 473 uint32_t CommunicationKDP::GetCPUType() { 474 if (!HostInfoIsValid()) 475 SendRequestHostInfo(); 476 return m_kdp_hostinfo_cpu_type; 477 } 478 479 uint32_t CommunicationKDP::GetCPUSubtype() { 480 if (!HostInfoIsValid()) 481 SendRequestHostInfo(); 482 return m_kdp_hostinfo_cpu_subtype; 483 } 484 485 lldb_private::UUID CommunicationKDP::GetUUID() { 486 UUID uuid; 487 if (GetKernelVersion() == NULL) 488 return uuid; 489 490 if (m_kernel_version.find("UUID=") == std::string::npos) 491 return uuid; 492 493 size_t p = m_kernel_version.find("UUID=") + strlen("UUID="); 494 std::string uuid_str = m_kernel_version.substr(p, 36); 495 if (uuid_str.size() < 32) 496 return uuid; 497 498 if (uuid.SetFromCString(uuid_str.c_str()) == 0) { 499 UUID invalid_uuid; 500 return invalid_uuid; 501 } 502 503 return uuid; 504 } 505 506 bool CommunicationKDP::RemoteIsEFI() { 507 if (GetKernelVersion() == NULL) 508 return false; 509 if (strncmp(m_kernel_version.c_str(), "EFI", 3) == 0) 510 return true; 511 else 512 return false; 513 } 514 515 bool CommunicationKDP::RemoteIsDarwinKernel() { 516 if (GetKernelVersion() == NULL) 517 return false; 518 if (m_kernel_version.find("Darwin Kernel") != std::string::npos) 519 return true; 520 else 521 return false; 522 } 523 524 lldb::addr_t CommunicationKDP::GetLoadAddress() { 525 if (GetKernelVersion() == NULL) 526 return LLDB_INVALID_ADDRESS; 527 528 if (m_kernel_version.find("stext=") == std::string::npos) 529 return LLDB_INVALID_ADDRESS; 530 size_t p = m_kernel_version.find("stext=") + strlen("stext="); 531 if (m_kernel_version[p] != '0' || m_kernel_version[p + 1] != 'x') 532 return LLDB_INVALID_ADDRESS; 533 534 addr_t kernel_load_address; 535 errno = 0; 536 kernel_load_address = ::strtoul(m_kernel_version.c_str() + p, NULL, 16); 537 if (errno != 0 || kernel_load_address == 0) 538 return LLDB_INVALID_ADDRESS; 539 540 return kernel_load_address; 541 } 542 543 bool CommunicationKDP::SendRequestHostInfo() { 544 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 545 m_byte_order); 546 const CommandType command = KDP_HOSTINFO; 547 const uint32_t command_length = 8; 548 MakeRequestPacketHeader(command, request_packet, command_length); 549 DataExtractor reply_packet; 550 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 551 lldb::offset_t offset = 8; 552 m_kdp_hostinfo_cpu_mask = reply_packet.GetU32(&offset); 553 m_kdp_hostinfo_cpu_type = reply_packet.GetU32(&offset); 554 m_kdp_hostinfo_cpu_subtype = reply_packet.GetU32(&offset); 555 556 ArchSpec kernel_arch; 557 kernel_arch.SetArchitecture(eArchTypeMachO, m_kdp_hostinfo_cpu_type, 558 m_kdp_hostinfo_cpu_subtype); 559 560 m_addr_byte_size = kernel_arch.GetAddressByteSize(); 561 m_byte_order = kernel_arch.GetByteOrder(); 562 return true; 563 } 564 return false; 565 } 566 567 const char *CommunicationKDP::GetKernelVersion() { 568 if (m_kernel_version.empty()) 569 SendRequestKernelVersion(); 570 return m_kernel_version.c_str(); 571 } 572 573 bool CommunicationKDP::SendRequestKernelVersion() { 574 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 575 m_byte_order); 576 const CommandType command = KDP_KERNELVERSION; 577 const uint32_t command_length = 8; 578 MakeRequestPacketHeader(command, request_packet, command_length); 579 DataExtractor reply_packet; 580 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 581 const char *kernel_version_cstr = reply_packet.PeekCStr(8); 582 if (kernel_version_cstr && kernel_version_cstr[0]) 583 m_kernel_version.assign(kernel_version_cstr); 584 return true; 585 } 586 return false; 587 } 588 589 bool CommunicationKDP::SendRequestDisconnect() { 590 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 591 m_byte_order); 592 const CommandType command = KDP_DISCONNECT; 593 const uint32_t command_length = 8; 594 MakeRequestPacketHeader(command, request_packet, command_length); 595 DataExtractor reply_packet; 596 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 597 // Are we supposed to get a reply for disconnect? 598 } 599 ClearKDPSettings(); 600 return true; 601 } 602 603 uint32_t CommunicationKDP::SendRequestReadMemory(lldb::addr_t addr, void *dst, 604 uint32_t dst_len, 605 Error &error) { 606 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 607 m_byte_order); 608 bool use_64 = (GetVersion() >= 11); 609 uint32_t command_addr_byte_size = use_64 ? 8 : 4; 610 const CommandType command = use_64 ? KDP_READMEM64 : KDP_READMEM; 611 // Size is header + address size + uint32_t length 612 const uint32_t command_length = 8 + command_addr_byte_size + 4; 613 MakeRequestPacketHeader(command, request_packet, command_length); 614 request_packet.PutMaxHex64(addr, command_addr_byte_size); 615 request_packet.PutHex32(dst_len); 616 DataExtractor reply_packet; 617 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 618 lldb::offset_t offset = 8; 619 uint32_t kdp_error = reply_packet.GetU32(&offset); 620 uint32_t src_len = reply_packet.GetByteSize() - 12; 621 622 if (src_len > 0) { 623 const void *src = reply_packet.GetData(&offset, src_len); 624 if (src) { 625 ::memcpy(dst, src, src_len); 626 error.Clear(); 627 return src_len; 628 } 629 } 630 if (kdp_error) 631 error.SetErrorStringWithFormat("kdp read memory failed (error %u)", 632 kdp_error); 633 else 634 error.SetErrorString("kdp read memory failed"); 635 } else { 636 error.SetErrorString("failed to send packet"); 637 } 638 return 0; 639 } 640 641 uint32_t CommunicationKDP::SendRequestWriteMemory(lldb::addr_t addr, 642 const void *src, 643 uint32_t src_len, 644 Error &error) { 645 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 646 m_byte_order); 647 bool use_64 = (GetVersion() >= 11); 648 uint32_t command_addr_byte_size = use_64 ? 8 : 4; 649 const CommandType command = use_64 ? KDP_WRITEMEM64 : KDP_WRITEMEM; 650 // Size is header + address size + uint32_t length 651 const uint32_t command_length = 8 + command_addr_byte_size + 4 + src_len; 652 MakeRequestPacketHeader(command, request_packet, command_length); 653 request_packet.PutMaxHex64(addr, command_addr_byte_size); 654 request_packet.PutHex32(src_len); 655 request_packet.PutRawBytes(src, src_len); 656 657 DataExtractor reply_packet; 658 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 659 lldb::offset_t offset = 8; 660 uint32_t kdp_error = reply_packet.GetU32(&offset); 661 if (kdp_error) 662 error.SetErrorStringWithFormat("kdp write memory failed (error %u)", 663 kdp_error); 664 else { 665 error.Clear(); 666 return src_len; 667 } 668 } else { 669 error.SetErrorString("failed to send packet"); 670 } 671 return 0; 672 } 673 674 bool CommunicationKDP::SendRawRequest( 675 uint8_t command_byte, 676 const void *src, // Raw packet payload bytes 677 uint32_t src_len, // Raw packet payload length 678 DataExtractor &reply_packet, Error &error) { 679 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 680 m_byte_order); 681 // Size is header + address size + uint32_t length 682 const uint32_t command_length = 8 + src_len; 683 const CommandType command = (CommandType)command_byte; 684 MakeRequestPacketHeader(command, request_packet, command_length); 685 request_packet.PutRawBytes(src, src_len); 686 687 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 688 lldb::offset_t offset = 8; 689 uint32_t kdp_error = reply_packet.GetU32(&offset); 690 if (kdp_error && (command_byte != KDP_DUMPINFO)) 691 error.SetErrorStringWithFormat("request packet 0x%8.8x failed (error %u)", 692 command_byte, kdp_error); 693 else { 694 error.Clear(); 695 return true; 696 } 697 } else { 698 error.SetErrorString("failed to send packet"); 699 } 700 return false; 701 } 702 703 const char *CommunicationKDP::GetCommandAsCString(uint8_t command) { 704 switch (command) { 705 case KDP_CONNECT: 706 return "KDP_CONNECT"; 707 case KDP_DISCONNECT: 708 return "KDP_DISCONNECT"; 709 case KDP_HOSTINFO: 710 return "KDP_HOSTINFO"; 711 case KDP_VERSION: 712 return "KDP_VERSION"; 713 case KDP_MAXBYTES: 714 return "KDP_MAXBYTES"; 715 case KDP_READMEM: 716 return "KDP_READMEM"; 717 case KDP_WRITEMEM: 718 return "KDP_WRITEMEM"; 719 case KDP_READREGS: 720 return "KDP_READREGS"; 721 case KDP_WRITEREGS: 722 return "KDP_WRITEREGS"; 723 case KDP_LOAD: 724 return "KDP_LOAD"; 725 case KDP_IMAGEPATH: 726 return "KDP_IMAGEPATH"; 727 case KDP_SUSPEND: 728 return "KDP_SUSPEND"; 729 case KDP_RESUMECPUS: 730 return "KDP_RESUMECPUS"; 731 case KDP_EXCEPTION: 732 return "KDP_EXCEPTION"; 733 case KDP_TERMINATION: 734 return "KDP_TERMINATION"; 735 case KDP_BREAKPOINT_SET: 736 return "KDP_BREAKPOINT_SET"; 737 case KDP_BREAKPOINT_REMOVE: 738 return "KDP_BREAKPOINT_REMOVE"; 739 case KDP_REGIONS: 740 return "KDP_REGIONS"; 741 case KDP_REATTACH: 742 return "KDP_REATTACH"; 743 case KDP_HOSTREBOOT: 744 return "KDP_HOSTREBOOT"; 745 case KDP_READMEM64: 746 return "KDP_READMEM64"; 747 case KDP_WRITEMEM64: 748 return "KDP_WRITEMEM64"; 749 case KDP_BREAKPOINT_SET64: 750 return "KDP_BREAKPOINT64_SET"; 751 case KDP_BREAKPOINT_REMOVE64: 752 return "KDP_BREAKPOINT64_REMOVE"; 753 case KDP_KERNELVERSION: 754 return "KDP_KERNELVERSION"; 755 case KDP_READPHYSMEM64: 756 return "KDP_READPHYSMEM64"; 757 case KDP_WRITEPHYSMEM64: 758 return "KDP_WRITEPHYSMEM64"; 759 case KDP_READIOPORT: 760 return "KDP_READIOPORT"; 761 case KDP_WRITEIOPORT: 762 return "KDP_WRITEIOPORT"; 763 case KDP_READMSR64: 764 return "KDP_READMSR64"; 765 case KDP_WRITEMSR64: 766 return "KDP_WRITEMSR64"; 767 case KDP_DUMPINFO: 768 return "KDP_DUMPINFO"; 769 } 770 return NULL; 771 } 772 773 void CommunicationKDP::DumpPacket(Stream &s, const void *data, 774 uint32_t data_len) { 775 DataExtractor extractor(data, data_len, m_byte_order, m_addr_byte_size); 776 DumpPacket(s, extractor); 777 } 778 779 void CommunicationKDP::DumpPacket(Stream &s, const DataExtractor &packet) { 780 const char *error_desc = NULL; 781 if (packet.GetByteSize() < 8) { 782 error_desc = "error: invalid packet (too short): "; 783 } else { 784 lldb::offset_t offset = 0; 785 const uint8_t first_packet_byte = packet.GetU8(&offset); 786 const uint8_t sequence_id = packet.GetU8(&offset); 787 const uint16_t length = packet.GetU16(&offset); 788 const uint32_t key = packet.GetU32(&offset); 789 const CommandType command = ExtractCommand(first_packet_byte); 790 const char *command_name = GetCommandAsCString(command); 791 if (command_name) { 792 const bool is_reply = ExtractIsReply(first_packet_byte); 793 s.Printf("(running=%i) %s %24s: 0x%2.2x 0x%2.2x 0x%4.4x 0x%8.8x ", 794 IsRunning(), is_reply ? "<--" : "-->", command_name, 795 first_packet_byte, sequence_id, length, key); 796 797 if (is_reply) { 798 // Dump request reply packets 799 switch (command) { 800 // Commands that return a single 32 bit error 801 case KDP_CONNECT: 802 case KDP_WRITEMEM: 803 case KDP_WRITEMEM64: 804 case KDP_BREAKPOINT_SET: 805 case KDP_BREAKPOINT_REMOVE: 806 case KDP_BREAKPOINT_SET64: 807 case KDP_BREAKPOINT_REMOVE64: 808 case KDP_WRITEREGS: 809 case KDP_LOAD: 810 case KDP_WRITEIOPORT: 811 case KDP_WRITEMSR64: { 812 const uint32_t error = packet.GetU32(&offset); 813 s.Printf(" (error=0x%8.8x)", error); 814 } break; 815 816 case KDP_DISCONNECT: 817 case KDP_REATTACH: 818 case KDP_HOSTREBOOT: 819 case KDP_SUSPEND: 820 case KDP_RESUMECPUS: 821 case KDP_EXCEPTION: 822 case KDP_TERMINATION: 823 // No return value for the reply, just the header to ack 824 s.PutCString(" ()"); 825 break; 826 827 case KDP_HOSTINFO: { 828 const uint32_t cpu_mask = packet.GetU32(&offset); 829 const uint32_t cpu_type = packet.GetU32(&offset); 830 const uint32_t cpu_subtype = packet.GetU32(&offset); 831 s.Printf(" (cpu_mask=0x%8.8x, cpu_type=0x%8.8x, cpu_subtype=0x%8.8x)", 832 cpu_mask, cpu_type, cpu_subtype); 833 } break; 834 835 case KDP_VERSION: { 836 const uint32_t version = packet.GetU32(&offset); 837 const uint32_t feature = packet.GetU32(&offset); 838 s.Printf(" (version=0x%8.8x, feature=0x%8.8x)", version, feature); 839 } break; 840 841 case KDP_REGIONS: { 842 const uint32_t region_count = packet.GetU32(&offset); 843 s.Printf(" (count = %u", region_count); 844 for (uint32_t i = 0; i < region_count; ++i) { 845 const addr_t region_addr = packet.GetPointer(&offset); 846 const uint32_t region_size = packet.GetU32(&offset); 847 const uint32_t region_prot = packet.GetU32(&offset); 848 s.Printf("\n\tregion[%" PRIu64 "] = { range = [0x%16.16" PRIx64 849 " - 0x%16.16" PRIx64 "), size = 0x%8.8x, prot = %s }", 850 region_addr, region_addr, region_addr + region_size, 851 region_size, GetPermissionsAsCString(region_prot)); 852 } 853 } break; 854 855 case KDP_READMEM: 856 case KDP_READMEM64: 857 case KDP_READPHYSMEM64: { 858 const uint32_t error = packet.GetU32(&offset); 859 const uint32_t count = packet.GetByteSize() - offset; 860 s.Printf(" (error = 0x%8.8x:\n", error); 861 if (count > 0) 862 packet.Dump(&s, // Stream to dump to 863 offset, // Offset within "packet" 864 eFormatBytesWithASCII, // Format to use 865 1, // Size of each item in bytes 866 count, // Number of items 867 16, // Number per line 868 m_last_read_memory_addr, // Don't show addresses before 869 // each line 870 0, 0); // No bitfields 871 } break; 872 873 case KDP_READREGS: { 874 const uint32_t error = packet.GetU32(&offset); 875 const uint32_t count = packet.GetByteSize() - offset; 876 s.Printf(" (error = 0x%8.8x regs:\n", error); 877 if (count > 0) 878 packet.Dump( 879 &s, // Stream to dump to 880 offset, // Offset within "packet" 881 eFormatHex, // Format to use 882 m_addr_byte_size, // Size of each item in bytes 883 count / m_addr_byte_size, // Number of items 884 16 / m_addr_byte_size, // Number per line 885 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 886 0, 0); // No bitfields 887 } break; 888 889 case KDP_KERNELVERSION: { 890 const char *kernel_version = packet.PeekCStr(8); 891 s.Printf(" (version = \"%s\")", kernel_version); 892 } break; 893 894 case KDP_MAXBYTES: { 895 const uint32_t max_bytes = packet.GetU32(&offset); 896 s.Printf(" (max_bytes = 0x%8.8x (%u))", max_bytes, max_bytes); 897 } break; 898 case KDP_IMAGEPATH: { 899 const char *path = packet.GetCStr(&offset); 900 s.Printf(" (path = \"%s\")", path); 901 } break; 902 903 case KDP_READIOPORT: 904 case KDP_READMSR64: { 905 const uint32_t error = packet.GetU32(&offset); 906 const uint32_t count = packet.GetByteSize() - offset; 907 s.Printf(" (error = 0x%8.8x io:\n", error); 908 if (count > 0) 909 packet.Dump( 910 &s, // Stream to dump to 911 offset, // Offset within "packet" 912 eFormatHex, // Format to use 913 1, // Size of each item in bytes 914 count, // Number of items 915 16, // Number per line 916 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 917 0, 0); // No bitfields 918 } break; 919 case KDP_DUMPINFO: { 920 const uint32_t count = packet.GetByteSize() - offset; 921 s.Printf(" (count = %u, bytes = \n", count); 922 if (count > 0) 923 packet.Dump( 924 &s, // Stream to dump to 925 offset, // Offset within "packet" 926 eFormatHex, // Format to use 927 1, // Size of each item in bytes 928 count, // Number of items 929 16, // Number per line 930 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 931 0, 0); // No bitfields 932 933 } break; 934 935 default: 936 s.Printf(" (add support for dumping this packet reply!!!"); 937 break; 938 } 939 } else { 940 // Dump request packets 941 switch (command) { 942 case KDP_CONNECT: { 943 const uint16_t reply_port = ntohs(packet.GetU16(&offset)); 944 const uint16_t exc_port = ntohs(packet.GetU16(&offset)); 945 s.Printf(" (reply_port = %u, exc_port = %u, greeting = \"%s\")", 946 reply_port, exc_port, packet.GetCStr(&offset)); 947 } break; 948 949 case KDP_DISCONNECT: 950 case KDP_HOSTREBOOT: 951 case KDP_HOSTINFO: 952 case KDP_VERSION: 953 case KDP_REGIONS: 954 case KDP_KERNELVERSION: 955 case KDP_MAXBYTES: 956 case KDP_IMAGEPATH: 957 case KDP_SUSPEND: 958 // No args, just the header in the request... 959 s.PutCString(" ()"); 960 break; 961 962 case KDP_RESUMECPUS: { 963 const uint32_t cpu_mask = packet.GetU32(&offset); 964 s.Printf(" (cpu_mask = 0x%8.8x)", cpu_mask); 965 } break; 966 967 case KDP_READMEM: { 968 const uint32_t addr = packet.GetU32(&offset); 969 const uint32_t size = packet.GetU32(&offset); 970 s.Printf(" (addr = 0x%8.8x, size = %u)", addr, size); 971 m_last_read_memory_addr = addr; 972 } break; 973 974 case KDP_WRITEMEM: { 975 const uint32_t addr = packet.GetU32(&offset); 976 const uint32_t size = packet.GetU32(&offset); 977 s.Printf(" (addr = 0x%8.8x, size = %u, bytes = \n", addr, size); 978 if (size > 0) 979 DataExtractor::DumpHexBytes(&s, packet.GetData(&offset, size), size, 980 32, addr); 981 } break; 982 983 case KDP_READMEM64: { 984 const uint64_t addr = packet.GetU64(&offset); 985 const uint32_t size = packet.GetU32(&offset); 986 s.Printf(" (addr = 0x%16.16" PRIx64 ", size = %u)", addr, size); 987 m_last_read_memory_addr = addr; 988 } break; 989 990 case KDP_READPHYSMEM64: { 991 const uint64_t addr = packet.GetU64(&offset); 992 const uint32_t size = packet.GetU32(&offset); 993 const uint32_t lcpu = packet.GetU16(&offset); 994 s.Printf(" (addr = 0x%16.16llx, size = %u, lcpu = %u)", addr, size, 995 lcpu); 996 m_last_read_memory_addr = addr; 997 } break; 998 999 case KDP_WRITEMEM64: { 1000 const uint64_t addr = packet.GetU64(&offset); 1001 const uint32_t size = packet.GetU32(&offset); 1002 s.Printf(" (addr = 0x%16.16" PRIx64 ", size = %u, bytes = \n", addr, 1003 size); 1004 if (size > 0) 1005 DataExtractor::DumpHexBytes(&s, packet.GetData(&offset, size), size, 1006 32, addr); 1007 } break; 1008 1009 case KDP_WRITEPHYSMEM64: { 1010 const uint64_t addr = packet.GetU64(&offset); 1011 const uint32_t size = packet.GetU32(&offset); 1012 const uint32_t lcpu = packet.GetU16(&offset); 1013 s.Printf(" (addr = 0x%16.16llx, size = %u, lcpu = %u, bytes = \n", 1014 addr, size, lcpu); 1015 if (size > 0) 1016 DataExtractor::DumpHexBytes(&s, packet.GetData(&offset, size), size, 1017 32, addr); 1018 } break; 1019 1020 case KDP_READREGS: { 1021 const uint32_t cpu = packet.GetU32(&offset); 1022 const uint32_t flavor = packet.GetU32(&offset); 1023 s.Printf(" (cpu = %u, flavor = %u)", cpu, flavor); 1024 } break; 1025 1026 case KDP_WRITEREGS: { 1027 const uint32_t cpu = packet.GetU32(&offset); 1028 const uint32_t flavor = packet.GetU32(&offset); 1029 const uint32_t nbytes = packet.GetByteSize() - offset; 1030 s.Printf(" (cpu = %u, flavor = %u, regs = \n", cpu, flavor); 1031 if (nbytes > 0) 1032 packet.Dump( 1033 &s, // Stream to dump to 1034 offset, // Offset within "packet" 1035 eFormatHex, // Format to use 1036 m_addr_byte_size, // Size of each item in bytes 1037 nbytes / m_addr_byte_size, // Number of items 1038 16 / m_addr_byte_size, // Number per line 1039 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 1040 0, 0); // No bitfields 1041 } break; 1042 1043 case KDP_BREAKPOINT_SET: 1044 case KDP_BREAKPOINT_REMOVE: { 1045 const uint32_t addr = packet.GetU32(&offset); 1046 s.Printf(" (addr = 0x%8.8x)", addr); 1047 } break; 1048 1049 case KDP_BREAKPOINT_SET64: 1050 case KDP_BREAKPOINT_REMOVE64: { 1051 const uint64_t addr = packet.GetU64(&offset); 1052 s.Printf(" (addr = 0x%16.16" PRIx64 ")", addr); 1053 } break; 1054 1055 case KDP_LOAD: { 1056 const char *path = packet.GetCStr(&offset); 1057 s.Printf(" (path = \"%s\")", path); 1058 } break; 1059 1060 case KDP_EXCEPTION: { 1061 const uint32_t count = packet.GetU32(&offset); 1062 1063 for (uint32_t i = 0; i < count; ++i) { 1064 const uint32_t cpu = packet.GetU32(&offset); 1065 const uint32_t exc = packet.GetU32(&offset); 1066 const uint32_t code = packet.GetU32(&offset); 1067 const uint32_t subcode = packet.GetU32(&offset); 1068 const char *exc_cstr = NULL; 1069 switch (exc) { 1070 case 1: 1071 exc_cstr = "EXC_BAD_ACCESS"; 1072 break; 1073 case 2: 1074 exc_cstr = "EXC_BAD_INSTRUCTION"; 1075 break; 1076 case 3: 1077 exc_cstr = "EXC_ARITHMETIC"; 1078 break; 1079 case 4: 1080 exc_cstr = "EXC_EMULATION"; 1081 break; 1082 case 5: 1083 exc_cstr = "EXC_SOFTWARE"; 1084 break; 1085 case 6: 1086 exc_cstr = "EXC_BREAKPOINT"; 1087 break; 1088 case 7: 1089 exc_cstr = "EXC_SYSCALL"; 1090 break; 1091 case 8: 1092 exc_cstr = "EXC_MACH_SYSCALL"; 1093 break; 1094 case 9: 1095 exc_cstr = "EXC_RPC_ALERT"; 1096 break; 1097 case 10: 1098 exc_cstr = "EXC_CRASH"; 1099 break; 1100 default: 1101 break; 1102 } 1103 1104 s.Printf("{ cpu = 0x%8.8x, exc = %s (%u), code = %u (0x%8.8x), " 1105 "subcode = %u (0x%8.8x)} ", 1106 cpu, exc_cstr, exc, code, code, subcode, subcode); 1107 } 1108 } break; 1109 1110 case KDP_TERMINATION: { 1111 const uint32_t term_code = packet.GetU32(&offset); 1112 const uint32_t exit_code = packet.GetU32(&offset); 1113 s.Printf(" (term_code = 0x%8.8x (%u), exit_code = 0x%8.8x (%u))", 1114 term_code, term_code, exit_code, exit_code); 1115 } break; 1116 1117 case KDP_REATTACH: { 1118 const uint16_t reply_port = ntohs(packet.GetU16(&offset)); 1119 s.Printf(" (reply_port = %u)", reply_port); 1120 } break; 1121 1122 case KDP_READMSR64: { 1123 const uint32_t address = packet.GetU32(&offset); 1124 const uint16_t lcpu = packet.GetU16(&offset); 1125 s.Printf(" (address=0x%8.8x, lcpu=0x%4.4x)", address, lcpu); 1126 } break; 1127 1128 case KDP_WRITEMSR64: { 1129 const uint32_t address = packet.GetU32(&offset); 1130 const uint16_t lcpu = packet.GetU16(&offset); 1131 const uint32_t nbytes = packet.GetByteSize() - offset; 1132 s.Printf(" (address=0x%8.8x, lcpu=0x%4.4x, nbytes=0x%8.8x)", lcpu, 1133 address, nbytes); 1134 if (nbytes > 0) 1135 packet.Dump( 1136 &s, // Stream to dump to 1137 offset, // Offset within "packet" 1138 eFormatHex, // Format to use 1139 1, // Size of each item in bytes 1140 nbytes, // Number of items 1141 16, // Number per line 1142 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 1143 0, 0); // No bitfields 1144 } break; 1145 1146 case KDP_READIOPORT: { 1147 const uint16_t lcpu = packet.GetU16(&offset); 1148 const uint16_t address = packet.GetU16(&offset); 1149 const uint16_t nbytes = packet.GetU16(&offset); 1150 s.Printf(" (lcpu=0x%4.4x, address=0x%4.4x, nbytes=%u)", lcpu, address, 1151 nbytes); 1152 } break; 1153 1154 case KDP_WRITEIOPORT: { 1155 const uint16_t lcpu = packet.GetU16(&offset); 1156 const uint16_t address = packet.GetU16(&offset); 1157 const uint16_t nbytes = packet.GetU16(&offset); 1158 s.Printf(" (lcpu = %u, addr = 0x%4.4x, nbytes = %u, bytes = \n", lcpu, 1159 address, nbytes); 1160 if (nbytes > 0) 1161 packet.Dump( 1162 &s, // Stream to dump to 1163 offset, // Offset within "packet" 1164 eFormatHex, // Format to use 1165 1, // Size of each item in bytes 1166 nbytes, // Number of items 1167 16, // Number per line 1168 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 1169 0, 0); // No bitfields 1170 } break; 1171 1172 case KDP_DUMPINFO: { 1173 const uint32_t count = packet.GetByteSize() - offset; 1174 s.Printf(" (count = %u, bytes = \n", count); 1175 if (count > 0) 1176 packet.Dump( 1177 &s, // Stream to dump to 1178 offset, // Offset within "packet" 1179 eFormatHex, // Format to use 1180 1, // Size of each item in bytes 1181 count, // Number of items 1182 16, // Number per line 1183 LLDB_INVALID_ADDRESS, // Don't show addresses before each line 1184 0, 0); // No bitfields 1185 1186 } break; 1187 } 1188 } 1189 } else { 1190 error_desc = "error: invalid packet command: "; 1191 } 1192 } 1193 1194 if (error_desc) { 1195 s.PutCString(error_desc); 1196 1197 packet.Dump(&s, // Stream to dump to 1198 0, // Offset into "packet" 1199 eFormatBytes, // Dump as hex bytes 1200 1, // Size of each item is 1 for single bytes 1201 packet.GetByteSize(), // Number of bytes 1202 UINT32_MAX, // Num bytes per line 1203 LLDB_INVALID_ADDRESS, // Base address 1204 0, 0); // Bitfield info set to not do anything bitfield related 1205 } 1206 } 1207 1208 uint32_t CommunicationKDP::SendRequestReadRegisters(uint32_t cpu, 1209 uint32_t flavor, void *dst, 1210 uint32_t dst_len, 1211 Error &error) { 1212 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1213 m_byte_order); 1214 const CommandType command = KDP_READREGS; 1215 // Size is header + 4 byte cpu and 4 byte flavor 1216 const uint32_t command_length = 8 + 4 + 4; 1217 MakeRequestPacketHeader(command, request_packet, command_length); 1218 request_packet.PutHex32(cpu); 1219 request_packet.PutHex32(flavor); 1220 DataExtractor reply_packet; 1221 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 1222 lldb::offset_t offset = 8; 1223 uint32_t kdp_error = reply_packet.GetU32(&offset); 1224 uint32_t src_len = reply_packet.GetByteSize() - 12; 1225 1226 if (src_len > 0) { 1227 const uint32_t bytes_to_copy = std::min<uint32_t>(src_len, dst_len); 1228 const void *src = reply_packet.GetData(&offset, bytes_to_copy); 1229 if (src) { 1230 ::memcpy(dst, src, bytes_to_copy); 1231 error.Clear(); 1232 // Return the number of bytes we could have returned regardless if 1233 // we copied them or not, just so we know when things don't match up 1234 return src_len; 1235 } 1236 } 1237 if (kdp_error) 1238 error.SetErrorStringWithFormat( 1239 "failed to read kdp registers for cpu %u flavor %u (error %u)", cpu, 1240 flavor, kdp_error); 1241 else 1242 error.SetErrorStringWithFormat( 1243 "failed to read kdp registers for cpu %u flavor %u", cpu, flavor); 1244 } else { 1245 error.SetErrorString("failed to send packet"); 1246 } 1247 return 0; 1248 } 1249 1250 uint32_t CommunicationKDP::SendRequestWriteRegisters(uint32_t cpu, 1251 uint32_t flavor, 1252 const void *src, 1253 uint32_t src_len, 1254 Error &error) { 1255 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1256 m_byte_order); 1257 const CommandType command = KDP_WRITEREGS; 1258 // Size is header + 4 byte cpu and 4 byte flavor 1259 const uint32_t command_length = 8 + 4 + 4 + src_len; 1260 MakeRequestPacketHeader(command, request_packet, command_length); 1261 request_packet.PutHex32(cpu); 1262 request_packet.PutHex32(flavor); 1263 request_packet.Write(src, src_len); 1264 DataExtractor reply_packet; 1265 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 1266 lldb::offset_t offset = 8; 1267 uint32_t kdp_error = reply_packet.GetU32(&offset); 1268 if (kdp_error == 0) 1269 return src_len; 1270 error.SetErrorStringWithFormat( 1271 "failed to read kdp registers for cpu %u flavor %u (error %u)", cpu, 1272 flavor, kdp_error); 1273 } else { 1274 error.SetErrorString("failed to send packet"); 1275 } 1276 return 0; 1277 } 1278 1279 bool CommunicationKDP::SendRequestResume() { 1280 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1281 m_byte_order); 1282 const CommandType command = KDP_RESUMECPUS; 1283 const uint32_t command_length = 12; 1284 MakeRequestPacketHeader(command, request_packet, command_length); 1285 request_packet.PutHex32(GetCPUMask()); 1286 1287 DataExtractor reply_packet; 1288 if (SendRequestAndGetReply(command, request_packet, reply_packet)) 1289 return true; 1290 return false; 1291 } 1292 1293 bool CommunicationKDP::SendRequestBreakpoint(bool set, addr_t addr) { 1294 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1295 m_byte_order); 1296 bool use_64 = (GetVersion() >= 11); 1297 uint32_t command_addr_byte_size = use_64 ? 8 : 4; 1298 const CommandType command = 1299 set ? (use_64 ? KDP_BREAKPOINT_SET64 : KDP_BREAKPOINT_SET) 1300 : (use_64 ? KDP_BREAKPOINT_REMOVE64 : KDP_BREAKPOINT_REMOVE); 1301 1302 const uint32_t command_length = 8 + command_addr_byte_size; 1303 MakeRequestPacketHeader(command, request_packet, command_length); 1304 request_packet.PutMaxHex64(addr, command_addr_byte_size); 1305 1306 DataExtractor reply_packet; 1307 if (SendRequestAndGetReply(command, request_packet, reply_packet)) { 1308 lldb::offset_t offset = 8; 1309 uint32_t kdp_error = reply_packet.GetU32(&offset); 1310 if (kdp_error == 0) 1311 return true; 1312 } 1313 return false; 1314 } 1315 1316 bool CommunicationKDP::SendRequestSuspend() { 1317 PacketStreamType request_packet(Stream::eBinary, m_addr_byte_size, 1318 m_byte_order); 1319 const CommandType command = KDP_SUSPEND; 1320 const uint32_t command_length = 8; 1321 MakeRequestPacketHeader(command, request_packet, command_length); 1322 DataExtractor reply_packet; 1323 if (SendRequestAndGetReply(command, request_packet, reply_packet)) 1324 return true; 1325 return false; 1326 } 1327