1from xnu import * 2from utils import * 3from process import * 4from pmap import * 5import struct 6 7def GetBinaryNameForPC(pc_val, user_lib_info = None): 8 """ find the binary in user_lib_info that the passed pc_val falls in range of. 9 params: 10 pc_val : int - integer form of the pc address 11 user_lib_info: [] of [] which hold start, end, binary name 12 returns: 13 str - Name of binary or "unknown" if not found. 14 """ 15 retval = "unknown" 16 if not user_lib_info: 17 return retval 18 matches = [] 19 for info in user_lib_info: 20 if pc_val >= info[0] and pc_val <= info[1]: 21 matches.append((pc_val - info[0], info[2])) 22 matches.sort() 23 if matches: 24 retval = matches[0][1] 25 return retval 26 27def ShowX86UserStack(thread, user_lib_info = None): 28 """ Display user space stack frame and pc addresses. 29 params: 30 thread: obj referencing thread value 31 returns: 32 Nothing 33 """ 34 iss = Cast(thread.machine.iss, 'x86_saved_state_t *') 35 abi = int(iss.flavor) 36 user_ip = 0 37 user_frame = 0 38 user_abi_ret_offset = 0 39 if abi == 0xf: 40 debuglog("User process is 64 bit") 41 user_ip = iss.uss.ss_64.isf.rip 42 user_frame = iss.uss.ss_64.rbp 43 user_abi_ret_offset = 8 44 user_abi_type = "uint64_t" 45 else: 46 debuglog("user process is 32 bit") 47 user_ip = iss.uss.ss_32.eip 48 user_frame = iss.uss.ss_32.ebp 49 user_abi_ret_offset = 4 50 user_abi_type = "uint32_t" 51 52 if user_ip == 0: 53 print("This activation does not appear to have a valid user context.") 54 return False 55 56 cur_ip = user_ip 57 cur_frame = user_frame 58 debuglog("ip= 0x%x , fr = 0x%x " % (cur_ip, cur_frame)) 59 60 frameformat = "{0:d} FP: 0x{1:x} PC: 0x{2:x}" 61 if user_lib_info is not None: 62 frameformat = "{0:d} {3: <30s} 0x{2:x}" 63 print(frameformat.format(0, cur_frame, cur_ip, GetBinaryNameForPC(cur_ip, user_lib_info))) 64 65 print(kern.Symbolicate(cur_ip)) 66 67 frameno = 0 68 while True: 69 frameno = frameno + 1 70 frame = GetUserDataAsString(thread.t_tro.tro_task, unsigned(cur_frame), user_abi_ret_offset*2) 71 cur_ip = _ExtractDataFromString(frame, user_abi_ret_offset, user_abi_type) 72 cur_frame = _ExtractDataFromString(frame, 0, user_abi_type) 73 if not cur_frame or cur_frame == 0x0000000800000008: 74 break 75 print(frameformat.format(frameno, cur_frame, cur_ip, GetBinaryNameForPC(cur_ip, user_lib_info))) 76 print(kern.Symbolicate(cur_ip)) 77 return 78 79def _PrintARMUserStack(task, cur_pc, cur_fp, framesize, frametype, frameformat, user_lib_info=None): 80 cur_pc = kern.StripUserPAC(cur_pc) 81 if cur_pc == 0: 82 "No valid user context for this activation." 83 return 84 frameno = 0 85 print(frameformat.format(frameno, cur_fp, cur_pc, GetBinaryNameForPC(cur_pc, user_lib_info))) 86 while True: 87 frameno = frameno + 1 88 frame = GetUserDataAsString(task, cur_fp, framesize) 89 cur_fp = _ExtractDataFromString(frame, 0, frametype) 90 cur_pc = _ExtractDataFromString(frame, (framesize // 2), frametype) 91 cur_pc = kern.StripUserPAC(cur_pc) 92 if not cur_fp: 93 break 94 print(frameformat.format(frameno, cur_fp, cur_pc, GetBinaryNameForPC(cur_pc, user_lib_info))) 95 96def ShowARM64UserStack(thread, user_lib_info = None): 97 SAVED_STATE_FLAVOR_ARM=20 98 SAVED_STATE_FLAVOR_ARM64=21 99 upcb_addr = kern.StripKernelPAC(thread.machine.upcb) 100 upcb = kern.GetValueFromAddress(upcb_addr, 'arm_saved_state_t *') 101 flavor = upcb.ash.flavor 102 frameformat = "{0:>2d} FP: 0x{1:x} PC: 0x{2:x}" 103 if flavor == SAVED_STATE_FLAVOR_ARM64: 104 cur_pc = unsigned(upcb.uss.ss_64.pc) 105 cur_fp = unsigned(upcb.uss.ss_64.fp) 106 if user_lib_info is not None: 107 frameformat = "{0:>2d} {3: <30s} 0x{2:x}" 108 framesize = 16 109 frametype = "uint64_t" 110 elif flavor == SAVED_STATE_FLAVOR_ARM: 111 cur_pc = unsigned(upcb.uss.ss_32.pc) 112 cur_fp = unsigned(upcb.uss.ss_32.r[7]) 113 if user_lib_info is not None: 114 frameformat = "{0:>2d}: {3: <30s} 0x{2:x}" 115 framesize = 8 116 frametype = "uint32_t" 117 else: 118 raise RuntimeError("Thread {0} has an invalid flavor {1}".format(unsigned(thread), flavor)) 119 120 _PrintARMUserStack(thread.t_tro.tro_task, cur_pc, cur_fp, framesize, frametype, frameformat, user_lib_info=user_lib_info) 121 122 123@lldb_command('showthreaduserstack') 124def ShowThreadUserStack(cmd_args=None): 125 """ Show user stack for a given thread. 126 Syntax: (lldb) showthreaduserstack <thread_ptr> 127 """ 128 if not cmd_args: 129 raise ArgumentError("Insufficient arguments") 130 131 thread = kern.GetValueFromAddress(ArgumentStringToInt(cmd_args[0]), 'thread *') 132 if kern.arch == "x86_64": 133 ShowX86UserStack(thread) 134 elif kern.arch.startswith("arm64"): 135 ShowARM64UserStack(thread) 136 return True 137 138@lldb_command('printuserdata','XO:') 139def PrintUserspaceData(cmd_args=None, cmd_options={}): 140 """ Read userspace data for given task and print based on format provided. 141 Syntax: (lldb) printuserdata <task_t> <uspace_address> <format_specifier> 142 params: 143 <task_t> : pointer to task 144 <uspace_address> : address to user space memory 145 <format_specifier> : String representation for processing the data and printing it. 146 e.g Q -> unsigned long long, q -> long long, I -> unsigned int, i -> int 147 10i -> 10 ints, 20s -> 20 character string, s -> null terminated string 148 See: https://docs.python.org/2/library/struct.html#format-characters 149 options: 150 -X : print all values in hex. 151 -O <file path>: Save data to file 152 """ 153 154 if not cmd_args or len(cmd_args) < 3: 155 raise ArgumentError("Insufficient arguments") 156 task = kern.GetValueFromAddress(cmd_args[0], 'task *') 157 uspace_addr = ArgumentStringToInt(cmd_args[1]) 158 format_specifier_str = cmd_args[2] 159 user_data_len = 0 160 if format_specifier_str == "s": 161 print("0x%x: " % uspace_addr + GetUserspaceString(task, uspace_addr)) 162 return True 163 164 try: 165 user_data_len = struct.calcsize(format_specifier_str) 166 except Exception as e: 167 raise ArgumentError("Invalid format specifier provided.") 168 169 user_data_string = GetUserDataAsString(task, uspace_addr, user_data_len) 170 if not user_data_string: 171 print("Could not read any data from userspace address.") 172 return False 173 if "-O" in cmd_options: 174 fh = open(cmd_options["-O"],"w") 175 fh.write(user_data_string) 176 fh.close() 177 print("Written %d bytes to %s." % (user_data_len, cmd_options['-O'])) 178 return True 179 upacked_data = struct.unpack(format_specifier_str, user_data_string) 180 element_size = user_data_len // len(upacked_data) 181 for i in range(len(upacked_data)): 182 if "-X" in cmd_options: 183 print("0x%x: " % (uspace_addr + i*element_size) + hex(upacked_data[i])) 184 else: 185 print("0x%x: " % (uspace_addr + i*element_size) + str(upacked_data[i])) 186 187 return True 188 189@lldb_command('showtaskuserargs') 190def ShowTaskUserArgs(cmd_args=None, cmd_options={}): 191 """ Read the process argv, env, and apple strings from the user stack 192 Syntax: (lldb) showtaskuserargs <task_t> 193 params: 194 <task_t> : pointer to task 195 """ 196 if not cmd_args or len(cmd_args) != 1: 197 raise ArgumentError("Insufficient arguments") 198 199 task = kern.GetValueFromAddress(cmd_args[0], 'task *') 200 proc = GetProcFromTask(task) 201 if not proc: 202 print("Task has no associated BSD process.") 203 return False 204 ptrsize = 8 if int(task.t_flags) & 0x1 else 4 205 206 format_string = "Q" if ptrsize == 8 else "I" 207 208 string_area_size = proc.p_argslen 209 string_area_addr = proc.user_stack - string_area_size 210 211 string_area = GetUserDataAsString(task, string_area_addr, string_area_size) 212 if not string_area: 213 print("Could not read any data from userspace address.") 214 return False 215 216 i = 0 217 pos = string_area_addr - ptrsize 218 219 for name in ["apple", "env", "argv"] : 220 while True: 221 if name == "argv" : 222 if i == proc.p_argc: 223 break 224 i += 1 225 226 pos -= ptrsize 227 228 user_data_string = GetUserDataAsString(task, pos, ptrsize) 229 ptr = struct.unpack(format_string, user_data_string)[0] 230 231 if ptr == 0: 232 break 233 234 if string_area_addr <= ptr and ptr < string_area_addr+string_area_size : 235 string_offset = ptr - string_area_addr 236 string = string_area[string_offset:].decode() 237 else: 238 string = GetUserspaceString(task, ptr) 239 240 print(name + "[]: " + string + '\n') 241 242 return True 243 244def ShowTaskUserStacks(task): 245 #print GetTaskSummary.header + " " + GetProcSummary.header 246 pval = GetProcFromTask(task) 247 #print GetTaskSummary(task) + " " + GetProcSummary(pval) + "\n \n" 248 crash_report_format_string = """\ 249Process: {pname:s} [{pid:d}] 250Path: {path: <50s} 251Identifier: {pname: <30s} 252Version: ??? (???) 253Code Type: {parch: <20s} 254Parent Process: {ppname:s} [{ppid:d}] 255 256Date/Time: {timest:s}.000 -0800 257OS Version: {osversion: <20s} 258Report Version: 8 259 260Exception Type: n/a 261Exception Codes: n/a 262Crashed Thread: 0 263 264Application Specific Information: 265Synthetic crash log generated from Kernel userstacks 266 267""" 268 user_lib_rex = re.compile("([0-9a-fx]+)\s-\s([0-9a-fx]+)\s+(.*?)\s", re.IGNORECASE|re.MULTILINE) 269 from datetime import datetime 270 if pval: 271 ts = datetime.fromtimestamp(int(pval.p_start.tv_sec)) 272 date_string = ts.strftime('%Y-%m-%d %H:%M:%S') 273 else: 274 date_string = "none" 275 is_64 = True 276 if pval and (pval.p_flag & 0x4) == 0 : 277 is_64 = False 278 279 parch_s = "" 280 if kern.arch == "x86_64" or kern.arch == "i386": 281 osversion = "Mac OS X 10.8" 282 parch_s = "I386 (32 bit)" 283 if is_64: 284 parch_s = "X86-64 (Native)" 285 else: 286 parch_s = kern.arch 287 osversion = "iOS" 288 osversion += " ({:s})".format(kern.globals.osversion) 289 if pval: 290 pid = GetProcPID(pval) 291 pname = GetProcName(pval) 292 path = GetProcName(pval) 293 ppid = pval.p_ppid 294 else: 295 pid = 0 296 pname = "unknown" 297 path = "unknown" 298 ppid = 0 299 300 print(crash_report_format_string.format(pid = pid, 301 pname = pname, 302 path = path, 303 ppid = ppid, 304 ppname = GetProcNameForPid(ppid), 305 timest = date_string, 306 parch = parch_s, 307 osversion = osversion 308 )) 309 print("Binary Images:") 310 ShowTaskUserLibraries([hex(task)]) 311 usertask_lib_info = [] # will host [startaddr, endaddr, lib_name] entries 312 for entry in ShowTaskUserLibraries.found_images: 313 #print "processing line %s" % line 314 arr = user_lib_rex.findall(entry[3]) 315 #print "%r" % arr 316 if len(arr) == 0 : 317 continue 318 usertask_lib_info.append([int(arr[0][0],16), int(arr[0][1],16), str(arr[0][2]).strip()]) 319 320 printthread_user_stack_ptr = ShowX86UserStack 321 if kern.arch.startswith("arm64"): 322 printthread_user_stack_ptr = ShowARM64UserStack 323 324 counter = 0 325 for thval in IterateQueue(task.threads, 'thread *', 'task_threads'): 326 print("\nThread {0:d} name:0x{1:x}\nThread {0:d}:".format(counter, thval)) 327 counter += 1 328 try: 329 printthread_user_stack_ptr(thval, usertask_lib_info) 330 except Exception as exc_err: 331 print("Failed to show user stack for thread 0x{0:x}".format(thval)) 332 if config['debug']: 333 raise exc_err 334 else: 335 print("Enable debugging ('(lldb) xnudebug debug') to see detailed trace.") 336 return 337 338@lldb_command('showtaskuserstacks', "P:F:") 339def ShowTaskUserStacksCmdHelper(cmd_args=None, cmd_options={}): 340 """ Print out the user stack for each thread in a task, followed by the user libraries. 341 Syntax: (lldb) showtaskuserstacks <task_t> 342 or: (lldb) showtaskuserstacks -P <pid> 343 or: (lldb) showtaskuserstacks -F <task_name> 344 The format is compatible with CrashTracer. You can also use the speedtracer plugin as follows 345 (lldb) showtaskuserstacks <task_t> -p speedtracer 346 347 Note: the address ranges are approximations. Also the list may not be completely accurate. This command expects memory read failures 348 and hence will skip a library if unable to read information. Please use your good judgement and not take the output as accurate 349 """ 350 task_list = [] 351 if "-F" in cmd_options: 352 task_list = FindTasksByName(cmd_options["-F"]) 353 elif "-P" in cmd_options: 354 pidval = ArgumentStringToInt(cmd_options["-P"]) 355 for t in kern.tasks: 356 pval = GetProcFromTask(t) 357 if pval and GetProcPID(pval) == pidval: 358 task_list.append(t) 359 break 360 elif cmd_args: 361 t = kern.GetValueFromAddress(cmd_args[0], 'task *') 362 task_list.append(t) 363 else: 364 raise ArgumentError("Insufficient arguments") 365 366 for task in task_list: 367 ShowTaskUserStacks(task) 368 369def GetUserDataAsString(task, addr, size): 370 """ Get data from task's address space as a string of bytes 371 params: 372 task: task object from which to extract information 373 addr: int - start address to get data from. 374 size: int - no of bytes to read. 375 returns: 376 data - a stream of bytes. Empty bytes() if read fails. 377 """ 378 err = lldb.SBError() 379 if GetConnectionProtocol() == "kdp": 380 kdp_pmap_addr = unsigned(addressof(kern.globals.kdp_pmap)) 381 if not WriteInt64ToMemoryAddress(unsigned(task.map.pmap), kdp_pmap_addr): 382 debuglog("Failed to write in kdp_pmap from GetUserDataAsString.") 383 return b"" 384 content = LazyTarget.GetProcess().ReadMemory(addr, size, err) 385 if not err.Success(): 386 debuglog("Failed to read process memory. Error: " + err.description) 387 return b"" 388 if not WriteInt64ToMemoryAddress(0, kdp_pmap_addr): 389 debuglog("Failed to reset in kdp_pmap from GetUserDataAsString.") 390 return b"" 391 elif (kern.arch == 'x86_64' or kern.arch.startswith('arm')) and (int(size) < (2 * kern.globals.page_size)): 392 # Without the benefit of a KDP stub on the target, try to 393 # find the user task's physical mapping and memcpy the data. 394 # If it straddles a page boundary, copy in two passes 395 range1_addr = int(addr) 396 range1_size = int(size) 397 if kern.StraddlesPage(range1_addr, range1_size): 398 range2_addr = int(kern.TruncPage(range1_addr + range1_size)) 399 range2_size = int(range1_addr + range1_size - range2_addr) 400 range1_size = int(range2_addr - range1_addr) 401 else: 402 range2_addr = 0 403 range2_size = 0 404 range2_in_kva = 0 405 406 paddr_range1 = PmapWalk(task.map.pmap, range1_addr, vSILENT) 407 if not paddr_range1: 408 debuglog("Not mapped task 0x{:x} address 0x{:x}".format(task, addr)) 409 return b"" 410 411 range1_in_kva = kern.PhysToKernelVirt(paddr_range1) 412 content = LazyTarget.GetProcess().ReadMemory(range1_in_kva, range1_size, err) 413 if not err.Success(): 414 raise RuntimeError("Failed to read process memory. Error: " + err.description) 415 416 if range2_addr: 417 paddr_range2 = PmapWalk(task.map.pmap, range2_addr, vSILENT) 418 if not paddr_range2: 419 debuglog("Not mapped task 0x{:x} address 0x{:x}".format(task, addr)) 420 return b"" 421 range2_in_kva = kern.PhysToKernelVirt(paddr_range2) 422 content += LazyTarget.GetProcess().ReadMemory(range2_in_kva, range2_size, err) 423 if not err.Success(): 424 raise RuntimeError("Failed to read process memory. Error: " + err.description) 425 else: 426 raise NotImplementedError("GetUserDataAsString does not support this configuration") 427 428 return content 429 430def _ExtractDataFromString(strdata, offset, data_type, length=0): 431 """ Extract specific data from string buffer 432 params: 433 strdata: str - string data give from GetUserDataAsString 434 offset: int - 0 based offset into the data. 435 data_type: str - defines what type to be read as. Supported values are: 436 'uint64_t', 'uint32_t', 'string' 437 length: int - used when data_type=='string' 438 returns 439 None - if extraction failed. 440 obj - based on what is requested in data_type 441 """ 442 unpack_str = "s" 443 if data_type == 'uint64_t': 444 length = 8 445 unpack_str = "Q" 446 elif data_type == "uint32_t": 447 length = 4 448 unpack_str = "I" 449 else: 450 unpack_str= "%ds" % length 451 452 data_len = len(strdata) 453 if offset > data_len or (offset + length) > data_len or offset < 0: 454 debuglog("Invalid arguments to _ExtractDataFromString.") 455 return 0 456 457 data = struct.unpack(unpack_str, strdata[offset:(offset + length)])[0] 458 if data_type == 'string': 459 return data.decode() 460 461 return data 462 463def GetUserspaceString(task, string_address): 464 """ Maps 32 bytes at a time and packs as string 465 params: 466 task: obj - referencing task to read data from 467 string_address: int - address where the image path is stored 468 returns: 469 str - string path of the file. "" if failed to read. 470 """ 471 retval = [] 472 while string_address > 0: 473 str_data = GetUserDataAsString(task, string_address, 32) 474 if not str_data: 475 break 476 str_data = str_data.split(b"\x00", 1)[0] 477 retval.append(str_data) 478 if len(str_data) < 32: 479 break # short read or found NUL byte 480 string_address += 32 481 return b"".join(retval).decode() 482 483def GetImageInfo(task, mh_image_address, mh_path_address, approx_end_address=None): 484 """ Print user library informaiton. 485 params: 486 task : obj referencing the task for which Image info printed 487 mh_image_address : int - address which has image info 488 mh_path_address : int - address which holds path name string 489 approx_end_address: int - address which lldbmacros think is end address. 490 returns: 491 str - string representing image info. "" if failure to read data. 492 """ 493 if approx_end_address: 494 image_end_load_address = int(approx_end_address) -1 495 else: 496 image_end_load_address = int(mh_image_address) + 0xffffffff 497 498 print_format = "0x{0:x} - 0x{1:x} {2: <50s} (??? - ???) <{3: <36s}> {4: <50s}" 499 # 32 bytes enough for mach_header/mach_header_64 500 mh_data = GetUserDataAsString(task, mh_image_address, 32) 501 if len(mh_data) == 0: 502 debuglog("unable to get userdata for task 0x{:x} img_addr 0x{:x} path_address 0x{:x}".format( 503 task, mh_image_address, mh_path_address)) 504 return "" 505 mh_magic = _ExtractDataFromString(mh_data, (4 * 0), "uint32_t") 506 mh_cputype = _ExtractDataFromString(mh_data,(4 * 1), "uint32_t") 507 mh_cpusubtype = _ExtractDataFromString(mh_data,(4 * 2), "uint32_t") 508 mh_filetype = _ExtractDataFromString(mh_data,(4 * 3), "uint32_t") 509 mh_ncmds = _ExtractDataFromString(mh_data,(4 * 4), "uint32_t") 510 mh_sizeofcmds = _ExtractDataFromString(mh_data,(4 * 5), "uint32_t") 511 mh_flags = _ExtractDataFromString(mh_data,(4 * 6), "uint32_t") 512 513 if mh_magic == 0xfeedfacf: 514 mh_64 = True 515 lc_address = mh_image_address + 32 516 else: 517 mh_64 = False 518 lc_address = mh_image_address + 28 519 520 lc_idx = 0 521 uuid_data = 0 522 found_uuid_data = False 523 retval = None 524 while lc_idx < mh_ncmds: 525 # 24 bytes is the size of uuid_command 526 lcmd_data = GetUserDataAsString(task, lc_address, 24) 527 lc_cmd = _ExtractDataFromString(lcmd_data, 4 * 0, "uint32_t") 528 lc_cmd_size = _ExtractDataFromString(lcmd_data, 4 * 1, "uint32_t") 529 lc_data = _ExtractDataFromString(lcmd_data, 4*2, "string", 16) 530 531 uuid_out_string = "" 532 path_out_string = "" 533 534 if lc_cmd == 0x1b: 535 # need to print the uuid now. 536 uuid_data = bytes(lc_data) 537 found_uuid_data = True 538 uuid_out_string = "{a[0]:02X}{a[1]:02X}{a[2]:02X}{a[3]:02X}-{a[4]:02X}{a[5]:02X}-{a[6]:02X}{a[7]:02X}-{a[8]:02X}{a[9]:02X}-{a[10]:02X}{a[11]:02X}{a[12]:02X}{a[13]:02X}{a[14]:02X}{a[15]:02X}".format(a=uuid_data) 539 #also print image path 540 path_out_string = GetUserspaceString(task, mh_path_address) 541 path_base_name = path_out_string.split("/")[-1] 542 retval = print_format.format(mh_image_address, image_end_load_address, path_base_name, uuid_out_string, path_out_string) 543 elif lc_cmd == 0xe: 544 ShowTaskUserLibraries.exec_load_path = lc_address + _ExtractDataFromString(lcmd_data, 4*2, "uint32_t") 545 debuglog("Found load command to be 0xe for address %s" % hex(ShowTaskUserLibraries.exec_load_path)) 546 lc_address = lc_address + lc_cmd_size 547 lc_idx += 1 548 549 if not found_uuid_data: 550 path_out_string = GetUserspaceString(task, mh_path_address) 551 path_base_name = path_out_string.split("/")[-1] 552 uuid_out_string = "" 553 554 retval = print_format.format(mh_image_address, image_end_load_address, path_base_name, uuid_out_string, path_out_string) 555 return retval 556 557@static_var("found_images", []) # holds entries of format (startaddr, endaddr, image_path_addr, infostring) 558@static_var("exec_load_path", 0) 559@lldb_command("showtaskuserlibraries") 560def ShowTaskUserLibraries(cmd_args=None): 561 """ Show binary images known by dyld in target task 562 For a given user task, inspect the dyld shared library state and print information about all Mach-O images. 563 Syntax: (lldb)showtaskuserlibraries <task_t> 564 Note: the address ranges are approximations. Also the list may not be completely accurate. This command expects memory read failures 565 and hence will skip a library if unable to read information. Please use your good judgement and not take the output as accurate 566 """ 567 if not cmd_args: 568 raise ArgumentError("Insufficient arguments") 569 570 #reset the found_images array 571 ShowTaskUserLibraries.found_images = [] 572 573 task = kern.GetValueFromAddress(cmd_args[0], 'task_t') 574 is_task_64 = int(task.t_flags) & 0x1 575 dyld_all_image_infos_address = unsigned(task.all_image_info_addr) 576 debuglog("dyld_all_image_infos_address = %s" % hex(dyld_all_image_infos_address)) 577 578 cur_data_offset = 0 579 if dyld_all_image_infos_address == 0: 580 print("No dyld shared library information available for task") 581 return False 582 583 debuglog("Extracting version information.") 584 vers_info_data = GetUserDataAsString(task, dyld_all_image_infos_address, 112) 585 version = _ExtractDataFromString(vers_info_data, cur_data_offset, "uint32_t") 586 cur_data_offset += 4 587 if version > 14: 588 print("Unknown dyld all_image_infos version number %d" % version) 589 image_info_count = _ExtractDataFromString(vers_info_data, cur_data_offset, "uint32_t") 590 debuglog("version = %d count = %d is_task_64 = %s" % (version, image_info_count, repr(is_task_64))) 591 592 ShowTaskUserLibraries.exec_load_path = 0 593 if is_task_64: 594 image_info_size = 24 595 image_info_array_address = _ExtractDataFromString(vers_info_data, 8, "uint64_t") 596 dyld_load_address = _ExtractDataFromString(vers_info_data, 8*4, "uint64_t") 597 dyld_all_image_infos_address_from_struct = _ExtractDataFromString(vers_info_data, 8*13, "uint64_t") 598 else: 599 image_info_size = 12 600 image_info_array_address = _ExtractDataFromString(vers_info_data, 4*2, "uint32_t") 601 dyld_load_address = _ExtractDataFromString(vers_info_data, 4*5, "uint32_t") 602 dyld_all_image_infos_address_from_struct = _ExtractDataFromString(vers_info_data, 4*14, "uint32_t") 603 # Account for ASLR slide before dyld can fix the structure 604 dyld_load_address = dyld_load_address + (dyld_all_image_infos_address - dyld_all_image_infos_address_from_struct) 605 606 i = 0 607 image_info_list = [] 608 while i < image_info_count: 609 image_info_address = image_info_array_address + i * image_info_size 610 debuglog("i = %d, image_info_address = %s, image_info_size = %d" % (i, hex(image_info_address), image_info_size)) 611 n_im_info_addr = None 612 img_data = "" 613 try: 614 img_data = GetUserDataAsString(task, image_info_address, image_info_size) 615 except Exception as e: 616 debuglog("Failed to read user data for task 0x{:x} addr 0x{:x}, exception {:s}".format(task, image_info_address, str(e))) 617 pass 618 619 if is_task_64: 620 image_info_addr = _ExtractDataFromString(img_data, 0, "uint64_t") 621 image_info_path = _ExtractDataFromString(img_data, 8, "uint64_t") 622 else: 623 image_info_addr = _ExtractDataFromString(img_data, 0, "uint32_t") 624 image_info_path = _ExtractDataFromString(img_data, 4, "uint32_t") 625 626 if image_info_addr : 627 debuglog("Found image: image_info_addr = %s, image_info_path= %s" % (hex(image_info_addr), hex(image_info_path))) 628 image_info_list.append((image_info_addr, image_info_path)) 629 i += 1 630 631 image_info_list.sort() 632 num_images_found = len(image_info_list) 633 634 for ii in range(num_images_found): 635 n_im_info_addr = dyld_load_address 636 if ii + 1 < num_images_found: 637 n_im_info_addr = image_info_list[ii+1][0] 638 639 image_info_addr = image_info_list[ii][0] 640 image_info_path = image_info_list[ii][1] 641 try: 642 image_print_s = GetImageInfo(task, image_info_addr, image_info_path, approx_end_address=n_im_info_addr) 643 if len(image_print_s) > 0: 644 print(image_print_s) 645 ShowTaskUserLibraries.found_images.append((image_info_addr, n_im_info_addr, image_info_path, image_print_s)) 646 else: 647 debuglog("Failed to print image info for task 0x{:x} image_info 0x{:x}".format(task, image_info_addr)) 648 except Exception as e: 649 if config['debug']: 650 raise e 651 652 # load_path might get set when the main executable is processed. 653 if ShowTaskUserLibraries.exec_load_path != 0: 654 debuglog("main executable load_path is set.") 655 image_print_s = GetImageInfo(task, dyld_load_address, ShowTaskUserLibraries.exec_load_path) 656 if len(image_print_s) > 0: 657 print(image_print_s) 658 ShowTaskUserLibraries.found_images.append((dyld_load_address, dyld_load_address + 0xffffffff, 659 ShowTaskUserLibraries.exec_load_path, image_print_s)) 660 else: 661 debuglog("Failed to print image for main executable for task 0x{:x} dyld_load_addr 0x{:x}".format(task, dyld_load_address)) 662 else: 663 debuglog("Falling back to vm entry method for finding executable load address") 664 print("# NOTE: Failed to find executable using all_image_infos. Using fuzzy match to find best possible load address for executable.") 665 ShowTaskLoadInfo([cmd_args[0]]) 666 return 667 668@lldb_command("showtaskuserdyldinfo") 669def ShowTaskUserDyldInfo(cmd_args=None): 670 """ Inspect the dyld global info for the given user task & print out all fields including error messages 671 Syntax: (lldb)showtaskuserdyldinfo <task_t> 672 """ 673 if cmd_args is None or len(cmd_args) < 1: 674 print("No arguments passed") 675 print(ShowTaskUserDyldInfo.__doc__.strip()) 676 return 677 678 out_str = "" 679 task = kern.GetValueFromAddress(cmd_args[0], 'task_t') 680 is_task_64 = int(task.t_flags) & 0x1 681 dyld_all_image_infos_address = unsigned(task.all_image_info_addr) 682 if dyld_all_image_infos_address == 0: 683 print("No dyld shared library information available for task") 684 return False 685 vers_info_data = GetUserDataAsString(task, dyld_all_image_infos_address, 112) 686 dyld_all_image_infos_version = _ExtractDataFromString(vers_info_data, 0, "uint32_t") 687 if dyld_all_image_infos_version > 14: 688 out_str += "Unknown dyld all_image_infos version number %d" % dyld_all_image_infos_version 689 690 # Find fields by byte offset. We assume at least version 9 is supported 691 if is_task_64: 692 dyld_all_image_infos_infoArrayCount = _ExtractDataFromString(vers_info_data, 4, "uint32_t") 693 dyld_all_image_infos_infoArray = _ExtractDataFromString(vers_info_data, 8, "uint64_t") 694 dyld_all_image_infos_notification = _ExtractDataFromString(vers_info_data, 16, "uint64_t") 695 dyld_all_image_infos_processDetachedFromSharedRegion = _ExtractDataFromString(vers_info_data, 24, "string") 696 dyld_all_image_infos_libSystemInitialized = _ExtractDataFromString(vers_info_data, 25, "string") 697 dyld_all_image_infos_dyldImageLoadAddress = _ExtractDataFromString(vers_info_data, 32, "uint64_t") 698 dyld_all_image_infos_jitInfo = _ExtractDataFromString(vers_info_data, 40, "uint64_t") 699 dyld_all_image_infos_dyldVersion = _ExtractDataFromString(vers_info_data, 48, "uint64_t") 700 dyld_all_image_infos_errorMessage = _ExtractDataFromString(vers_info_data, 56, "uint64_t") 701 dyld_all_image_infos_terminationFlags = _ExtractDataFromString(vers_info_data, 64, "uint64_t") 702 dyld_all_image_infos_coreSymbolicationShmPage = _ExtractDataFromString(vers_info_data, 72, "uint64_t") 703 dyld_all_image_infos_systemOrderFlag = _ExtractDataFromString(vers_info_data, 80, "uint64_t") 704 dyld_all_image_infos_uuidArrayCount = _ExtractDataFromString(vers_info_data, 88, "uint64_t") 705 dyld_all_image_infos_uuidArray = _ExtractDataFromString(vers_info_data, 96, "uint64_t") 706 dyld_all_image_infos_dyldAllImageInfosAddress = _ExtractDataFromString(vers_info_data, 104, "uint64_t") 707 else: 708 dyld_all_image_infos_infoArrayCount = _ExtractDataFromString(vers_info_data, 4, "uint32_t") 709 dyld_all_image_infos_infoArray = _ExtractDataFromString(vers_info_data, 8, "uint32_t") 710 dyld_all_image_infos_notification = _ExtractDataFromString(vers_info_data, 12, "uint32_t") 711 dyld_all_image_infos_processDetachedFromSharedRegion = _ExtractDataFromString(vers_info_data, 16, "string") 712 dyld_all_image_infos_libSystemInitialized = _ExtractDataFromString(vers_info_data, 17, "string") 713 dyld_all_image_infos_dyldImageLoadAddress = _ExtractDataFromString(vers_info_data, 20, "uint32_t") 714 dyld_all_image_infos_jitInfo = _ExtractDataFromString(vers_info_data, 24, "uint32_t") 715 dyld_all_image_infos_dyldVersion = _ExtractDataFromString(vers_info_data, 28, "uint32_t") 716 dyld_all_image_infos_errorMessage = _ExtractDataFromString(vers_info_data, 32, "uint32_t") 717 dyld_all_image_infos_terminationFlags = _ExtractDataFromString(vers_info_data, 36, "uint32_t") 718 dyld_all_image_infos_coreSymbolicationShmPage = _ExtractDataFromString(vers_info_data, 40, "uint32_t") 719 dyld_all_image_infos_systemOrderFlag = _ExtractDataFromString(vers_info_data, 44, "uint32_t") 720 dyld_all_image_infos_uuidArrayCount = _ExtractDataFromString(vers_info_data, 48, "uint32_t") 721 dyld_all_image_infos_uuidArray = _ExtractDataFromString(vers_info_data, 52, "uint32_t") 722 dyld_all_image_infos_dyldAllImageInfosAddress = _ExtractDataFromString(vers_info_data, 56, "uint32_t") 723 724 dyld_all_imfo_infos_slide = (dyld_all_image_infos_address - dyld_all_image_infos_dyldAllImageInfosAddress) 725 dyld_all_image_infos_dyldVersion_postslide = (dyld_all_image_infos_dyldVersion + dyld_all_imfo_infos_slide) 726 727 path_out = GetUserspaceString(task, dyld_all_image_infos_dyldVersion_postslide) 728 out_str += "[dyld-{:s}]\n".format(path_out) 729 out_str += "version \t\t\t\t: {:d}\n".format(dyld_all_image_infos_version) 730 out_str += "infoArrayCount \t\t\t\t: {:d}\n".format(dyld_all_image_infos_infoArrayCount) 731 out_str += "infoArray \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_infoArray) 732 out_str += "notification \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_notification) 733 734 out_str += "processDetachedFromSharedRegion \t: " 735 if dyld_all_image_infos_processDetachedFromSharedRegion != "": 736 out_str += "TRUE\n".format(dyld_all_image_infos_processDetachedFromSharedRegion) 737 else: 738 out_str += "FALSE\n" 739 740 out_str += "libSystemInitialized \t\t\t: " 741 if dyld_all_image_infos_libSystemInitialized != "": 742 out_str += "TRUE\n".format(dyld_all_image_infos_libSystemInitialized) 743 else: 744 out_str += "FALSE\n" 745 746 out_str += "dyldImageLoadAddress \t\t\t: {:#x}\n".format(dyld_all_image_infos_dyldImageLoadAddress) 747 out_str += "jitInfo \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_jitInfo) 748 out_str += "\ndyldVersion \t\t\t\t: {:#x}".format(dyld_all_image_infos_dyldVersion) 749 if (dyld_all_imfo_infos_slide != 0): 750 out_str += " (currently {:#x})\n".format(dyld_all_image_infos_dyldVersion_postslide) 751 else: 752 out_str += "\n" 753 754 out_str += "errorMessage \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_errorMessage) 755 if dyld_all_image_infos_errorMessage != 0: 756 out_str += GetUserspaceString(task, dyld_all_image_infos_errorMessage) 757 758 out_str += "terminationFlags \t\t\t: {:#x}\n".format(dyld_all_image_infos_terminationFlags) 759 out_str += "coreSymbolicationShmPage \t\t: {:#x}\n".format(dyld_all_image_infos_coreSymbolicationShmPage) 760 out_str += "systemOrderFlag \t\t\t: {:#x}\n".format(dyld_all_image_infos_systemOrderFlag) 761 out_str += "uuidArrayCount \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_uuidArrayCount) 762 out_str += "uuidArray \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_uuidArray) 763 out_str += "dyldAllImageInfosAddress \t\t: {:#x}".format(dyld_all_image_infos_dyldAllImageInfosAddress) 764 if (dyld_all_imfo_infos_slide != 0): 765 out_str += " (currently {:#x})\n".format(dyld_all_image_infos_address) 766 else: 767 out_str += "\n" 768 769 if is_task_64: 770 dyld_all_image_infos_address = dyld_all_image_infos_address + 112 771 dyld_all_image_infos_v10 = GetUserDataAsString(task, dyld_all_image_infos_address, 64) 772 dyld_all_image_infos_initialImageCount = _ExtractDataFromString(dyld_all_image_infos_v10, 112-112, "uint64_t") 773 dyld_all_image_infos_errorKind = _ExtractDataFromString(dyld_all_image_infos_v10, 120-112, "uint64_t") 774 dyld_all_image_infos_errorClientOfDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 128-112, "uint64_t") 775 dyld_all_image_infos_errorTargetDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 136-112, "uint64_t") 776 dyld_all_image_infos_errorSymbol = _ExtractDataFromString(dyld_all_image_infos_v10, 144-112, "uint64_t") 777 dyld_all_image_infos_sharedCacheSlide = _ExtractDataFromString(dyld_all_image_infos_v10, 152-112, "uint64_t") 778 dyld_all_image_infos_sharedCacheUUID = _ExtractDataFromString(dyld_all_image_infos_v10, 160-112, "string") 779 else: 780 dyld_all_image_infos_address = dyld_all_image_infos_address + 60 781 dyld_all_image_infos_v10 = GetUserDataAsString(task, dyld_all_image_infos_address, 40) 782 dyld_all_image_infos_initialImageCount = _ExtractDataFromString(dyld_all_image_infos_v10, 60-60, "uint32_t") 783 dyld_all_image_infos_errorKind = _ExtractDataFromString(dyld_all_image_infos_v10, 64-60, "uint32_t") 784 dyld_all_image_infos_errorClientOfDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 68-60, "uint32_t") 785 dyld_all_image_infos_errorTargetDylibPath = _ExtractDataFromString(dyld_all_image_infos_v10, 72-60, "uint32_t") 786 dyld_all_image_infos_errorSymbol = _ExtractDataFromString(dyld_all_image_infos_v10, 76-60, "uint32_t") 787 dyld_all_image_infos_sharedCacheSlide = _ExtractDataFromString(dyld_all_image_infos_v10, 80-60, "uint32_t") 788 dyld_all_image_infos_sharedCacheUUID = _ExtractDataFromString(dyld_all_image_infos_v10, 84-60, "string") 789 790 if dyld_all_image_infos_version >= 10: 791 out_str += "\ninitialImageCount \t\t\t: {:#x}\n".format(dyld_all_image_infos_initialImageCount) 792 793 if dyld_all_image_infos_version >= 11: 794 out_str += "errorKind \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_errorKind) 795 out_str += "errorClientOfDylibPath \t\t\t: {:#x}\n".format(dyld_all_image_infos_errorClientOfDylibPath) 796 if dyld_all_image_infos_errorClientOfDylibPath != 0: 797 out_str += "\t\t\t\t" 798 out_str += GetUserspaceString(task, dyld_all_image_infos_errorClientOfDylibPath) 799 out_str += "\n" 800 out_str += "errorTargetDylibPath \t\t\t: {:#x}\n".format(dyld_all_image_infos_errorTargetDylibPath) 801 if dyld_all_image_infos_errorTargetDylibPath != 0: 802 out_str += "\t\t\t\t" 803 out_str += GetUserspaceString(task, dyld_all_image_infos_errorTargetDylibPath) 804 out_str += "\n" 805 out_str += "errorSymbol \t\t\t\t: {:#x}\n".format(dyld_all_image_infos_errorSymbol) 806 if dyld_all_image_infos_errorSymbol != 0: 807 out_str += "\t\t\t\t" 808 out_str += GetUserspaceString(task, dyld_all_image_infos_errorSymbol) 809 out_str += "\n" 810 811 if dyld_all_image_infos_version >= 12: 812 out_str += "sharedCacheSlide \t\t\t: {:#x}\n".format(dyld_all_image_infos_sharedCacheSlide) 813 if dyld_all_image_infos_version >= 13 and dyld_all_image_infos_sharedCacheUUID != "": 814 out_str += "sharedCacheUUID \t\t\t: {:s}\n".format(dyld_all_image_infos_sharedCacheUUID) 815 else: 816 out_str += "No dyld information available for task\n" 817 print(out_str) 818 819def SaveDataToFile(start_addr, length, outputfile, task=None,): 820 """ Save the data at the specified address (of the specified length) to the file. 821 params: start_addr : start address of the region of memory to save 822 length : length of the region of memory to save 823 outputfile : file to save the data in 824 task (optional) : task containing the memory region (if from user data) 825 returns: True if we saved the requested data, False otherwise 826 """ 827 if task: 828 memory_data = GetUserDataAsString(task, start_addr, length) 829 else: 830 err = lldb.SBError() 831 memory_data = LazyTarget.GetProcess().ReadMemory(start_addr, length, err) 832 if not err.Success(): 833 print("Failed to read process memory. {:d} bytes from address {: <#020x}. Error: {}".format(length, start_addr, err.description)) 834 return False 835 836 if len(memory_data) != length: 837 print("Failed to read {:d} bytes from address {: <#020x}".format(length, start_addr)) 838 return False 839 840 fh = open(outputfile, 'wb') 841 fh.write(memory_data) 842 fh.close() 843 print("Saved {:d} bytes to file {:s}".format(length, outputfile)) 844 return True 845 846 847@lldb_command('savekcdata', 'T:O:') 848def SaveKCDataToFile(cmd_args=None, cmd_options={}): 849 """ Save the data referred by the kcdata_descriptor structure. 850 options: 851 -T: <task_t> pointer to task if memory referenced is in userstask. 852 -O: <output file path> path to file to save data. default: /tmp/kcdata.<timestamp>.bin 853 Usage: (lldb) savekcdata <kcdata_descriptor_t> -T <task_t> -O /path/to/outputfile.bin 854 """ 855 if not cmd_args: 856 raise ArgumentError('Please provide the kcdata descriptor.') 857 858 kcdata = kern.GetValueFromAddress(cmd_args[0], 'kcdata_descriptor_t') 859 860 outputfile = '/tmp/kcdata.{:s}.bin'.format(str(time.time())) 861 task = None 862 if '-O' in cmd_options: 863 outputfile = cmd_options['-O'] 864 if '-T' in cmd_options: 865 task = kern.GetValueFromAddress(cmd_options['-T'], 'task_t') 866 867 memory_begin_address = unsigned(kcdata.kcd_addr_begin) 868 memory_size = 16 + unsigned(kcdata.kcd_addr_end) - memory_begin_address 869 flags_copyout = unsigned(kcdata.kcd_flags) 870 if flags_copyout: 871 if not task: 872 raise ArgumentError('Invalid task pointer provided.') 873 return SaveDataToFile(memory_begin_address, memory_size, outputfile, task) 874 else: 875 return SaveDataToFile(memory_begin_address, memory_size, outputfile, None) 876