db_command.c revision 1.158
1 /* $NetBSD: db_command.c,v 1.158 2018/09/15 08:48:18 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1997, 1998, 1999, 2002, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Hamsik, and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Mach Operating System 34 * Copyright (c) 1991,1990 Carnegie Mellon University 35 * All Rights Reserved. 36 * 37 * Permission to use, copy, modify and distribute this software and its 38 * documentation is hereby granted, provided that both the copyright 39 * notice and this permission notice appear in all copies of the 40 * software, derivative works or modified versions, and any portions 41 * thereof, and that both notices appear in supporting documentation. 42 * 43 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 44 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 45 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 46 * 47 * Carnegie Mellon requests users of this software to return to 48 * 49 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 50 * School of Computer Science 51 * Carnegie Mellon University 52 * Pittsburgh PA 15213-3890 53 * 54 * any improvements or extensions that they make and grant Carnegie the 55 * rights to redistribute these changes. 56 */ 57 58 /* 59 * Command dispatcher. 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: db_command.c,v 1.158 2018/09/15 08:48:18 mrg Exp $"); 64 65 #ifdef _KERNEL_OPT 66 #include "opt_aio.h" 67 #include "opt_ddb.h" 68 #include "opt_kgdb.h" 69 #include "opt_mqueue.h" 70 #include "opt_inet.h" 71 #include "opt_kernhist.h" 72 #include "opt_ddbparam.h" 73 #include "opt_multiprocessor.h" 74 #endif 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/reboot.h> 79 #include <sys/device.h> 80 #include <sys/lwp.h> 81 #include <sys/mbuf.h> 82 #include <sys/namei.h> 83 #include <sys/pool.h> 84 #include <sys/proc.h> 85 #include <sys/vnode.h> 86 #include <sys/vmem.h> 87 #include <sys/lockdebug.h> 88 #include <sys/cpu.h> 89 #include <sys/buf.h> 90 #include <sys/module.h> 91 #include <sys/kernhist.h> 92 #include <sys/socketvar.h> 93 94 /*include queue macros*/ 95 #include <sys/queue.h> 96 97 #include <ddb/ddb.h> 98 99 #include <uvm/uvm_extern.h> 100 #include <uvm/uvm_ddb.h> 101 102 #include <net/route.h> 103 104 /* 105 * Results of command search. 106 */ 107 #define CMD_EXACT 0 108 #define CMD_PREFIX 1 109 #define CMD_NONE 2 110 #define CMD_AMBIGUOUS 3 111 112 /* 113 * Exported global variables 114 */ 115 bool db_cmd_loop_done; 116 label_t *db_recover; 117 db_addr_t db_dot; 118 db_addr_t db_last_addr; 119 db_addr_t db_prev; 120 db_addr_t db_next; 121 122 123 /* 124 * New DDB api for adding and removing commands uses three lists, because 125 * we use two types of commands 126 * a) standard commands without subcommands -> reboot 127 * b) show commands which are subcommands of show command -> show aio_jobs 128 * c) if defined machine specific commands 129 * 130 * ddb_add_cmd, ddb_rem_cmd use type (DDB_SHOW_CMD||DDB_BASE_CMD)argument to 131 * add them to representativ lists. 132 */ 133 134 static const struct db_command db_command_table[]; 135 static const struct db_command db_show_cmds[]; 136 137 #ifdef DB_MACHINE_COMMANDS 138 /* arch/<arch>/<arch>/db_interface.c */ 139 extern const struct db_command db_machine_command_table[]; 140 #endif 141 142 /* the global queue of all command tables */ 143 TAILQ_HEAD(db_cmd_tbl_en_head, db_cmd_tbl_en); 144 145 /* TAILQ entry used to register command tables */ 146 struct db_cmd_tbl_en { 147 const struct db_command *db_cmd; /* cmd table */ 148 TAILQ_ENTRY(db_cmd_tbl_en) db_cmd_next; 149 }; 150 151 /* head of base commands list */ 152 static struct db_cmd_tbl_en_head db_base_cmd_list = 153 TAILQ_HEAD_INITIALIZER(db_base_cmd_list); 154 static struct db_cmd_tbl_en db_base_cmd_builtins = 155 { .db_cmd = db_command_table }; 156 157 /* head of show commands list */ 158 static struct db_cmd_tbl_en_head db_show_cmd_list = 159 TAILQ_HEAD_INITIALIZER(db_show_cmd_list); 160 static struct db_cmd_tbl_en db_show_cmd_builtins = 161 { .db_cmd = db_show_cmds }; 162 163 /* head of machine commands list */ 164 static struct db_cmd_tbl_en_head db_mach_cmd_list = 165 TAILQ_HEAD_INITIALIZER(db_mach_cmd_list); 166 #ifdef DB_MACHINE_COMMANDS 167 static struct db_cmd_tbl_en db_mach_cmd_builtins = 168 { .db_cmd = db_machine_command_table }; 169 #endif 170 171 /* 172 * if 'ed' style: 'dot' is set at start of last item printed, 173 * and '+' points to next line. 174 * Otherwise: 'dot' points to next item, '..' points to last. 175 */ 176 static bool db_ed_style = true; 177 178 static void db_init_commands(void); 179 static int db_register_tbl_entry(uint8_t type, 180 struct db_cmd_tbl_en *list_ent); 181 static void db_cmd_list(const struct db_cmd_tbl_en_head *); 182 static int db_cmd_search(const char *, struct db_cmd_tbl_en_head *, 183 const struct db_command **); 184 static int db_cmd_search_table(const char *, const struct db_command *, 185 const struct db_command **); 186 static void db_cmd_search_failed(char *, int); 187 static const struct db_command *db_read_command(void); 188 static void db_command(const struct db_command **); 189 static void db_buf_print_cmd(db_expr_t, bool, db_expr_t, const char *); 190 static void db_event_print_cmd(db_expr_t, bool, db_expr_t, const char *); 191 static void db_fncall(db_expr_t, bool, db_expr_t, const char *); 192 static void db_help_print_cmd(db_expr_t, bool, db_expr_t, const char *); 193 static void db_lock_print_cmd(db_expr_t, bool, db_expr_t, const char *); 194 static void db_show_all_locks(db_expr_t, bool, db_expr_t, const char *); 195 static void db_show_lockstats(db_expr_t, bool, db_expr_t, const char *); 196 static void db_mount_print_cmd(db_expr_t, bool, db_expr_t, const char *); 197 static void db_mbuf_print_cmd(db_expr_t, bool, db_expr_t, const char *); 198 static void db_map_print_cmd(db_expr_t, bool, db_expr_t, const char *); 199 static void db_namecache_print_cmd(db_expr_t, bool, db_expr_t, 200 const char *); 201 static void db_object_print_cmd(db_expr_t, bool, db_expr_t, const char *); 202 static void db_page_print_cmd(db_expr_t, bool, db_expr_t, const char *); 203 static void db_show_all_pages(db_expr_t, bool, db_expr_t, const char *); 204 static void db_pool_print_cmd(db_expr_t, bool, db_expr_t, const char *); 205 static void db_reboot_cmd(db_expr_t, bool, db_expr_t, const char *); 206 static void db_sifting_cmd(db_expr_t, bool, db_expr_t, const char *); 207 static void db_socket_print_cmd(db_expr_t, bool, db_expr_t, const char *); 208 static void db_stack_trace_cmd(db_expr_t, bool, db_expr_t, const char *); 209 static void db_sync_cmd(db_expr_t, bool, db_expr_t, const char *); 210 static void db_whatis_cmd(db_expr_t, bool, db_expr_t, const char *); 211 static void db_uvmexp_print_cmd(db_expr_t, bool, db_expr_t, const char *); 212 #ifdef KERNHIST 213 static void db_kernhist_print_cmd(db_expr_t, bool, db_expr_t, const char *); 214 #endif 215 static void db_vnode_print_cmd(db_expr_t, bool, db_expr_t, const char *); 216 static void db_vnode_lock_print_cmd(db_expr_t, bool, db_expr_t, 217 const char *); 218 static void db_vmem_print_cmd(db_expr_t, bool, db_expr_t, const char *); 219 220 static const struct db_command db_show_cmds[] = { 221 /*added from all sub cmds*/ 222 { DDB_ADD_CMD("callout", db_show_callout, 223 0 ,"List all used callout functions.",NULL,NULL) }, 224 { DDB_ADD_CMD("pages", db_show_all_pages, 225 0 ,"List all used memory pages.",NULL,NULL) }, 226 { DDB_ADD_CMD("proc", db_show_proc, 227 0 ,"Print process information.",NULL,NULL) }, 228 { DDB_ADD_CMD("procs", db_show_all_procs, 229 0 ,"List all processes.",NULL,NULL) }, 230 { DDB_ADD_CMD("pools", db_show_all_pools, 231 0 ,"Show all pools",NULL,NULL) }, 232 { DDB_ADD_CMD("locks", db_show_all_locks, 233 0 ,"Show all held locks", "[/t]", NULL) }, 234 #ifdef AIO 235 /*added from all sub cmds*/ 236 { DDB_ADD_CMD("aio_jobs", db_show_aio_jobs, 0, 237 "Show aio jobs",NULL,NULL) }, 238 #endif 239 { DDB_ADD_CMD("all", NULL, 240 CS_COMPAT, NULL,NULL,NULL) }, 241 #if defined(INET) 242 { DDB_ADD_CMD("routes", db_show_routes, 0,NULL,NULL,NULL) }, 243 #endif 244 #ifdef _KERNEL 245 { DDB_ADD_CMD("breaks", db_listbreak_cmd, 0, 246 "Display all breaks.",NULL,NULL) }, 247 #endif 248 { DDB_ADD_CMD("buf", db_buf_print_cmd, 0, 249 "Print the struct buf at address.", "[/f] address",NULL) }, 250 { DDB_ADD_CMD("devices", db_show_all_devices, 0,NULL,NULL,NULL) }, 251 { DDB_ADD_CMD("event", db_event_print_cmd, 0, 252 "Print all the non-zero evcnt(9) event counters.", "[/fitm]",NULL) }, 253 { DDB_ADD_CMD("files", db_show_files_cmd, 0, 254 "Print the files open by process at address", 255 "[/f] address", NULL) }, 256 { DDB_ADD_CMD("lock", db_lock_print_cmd, 0,NULL,NULL,NULL) }, 257 { DDB_ADD_CMD("lockstats", 258 db_show_lockstats, 0, 259 "Print statistics of locks", NULL, NULL) }, 260 { DDB_ADD_CMD("map", db_map_print_cmd, 0, 261 "Print the vm_map at address.", "[/f] address",NULL) }, 262 { DDB_ADD_CMD("socket", db_socket_print_cmd, 0,NULL,NULL,NULL) }, 263 { DDB_ADD_CMD("module", db_show_module_cmd, 0, 264 "Print kernel modules", NULL, NULL) }, 265 { DDB_ADD_CMD("mount", db_mount_print_cmd, 0, 266 "Print the mount structure at address.", "[/f] address",NULL) }, 267 #ifdef MQUEUE 268 { DDB_ADD_CMD("mqueue", db_show_mqueue_cmd, 0, 269 "Print the message queues", NULL, NULL) }, 270 #endif 271 { DDB_ADD_CMD("mbuf", db_mbuf_print_cmd, 0,NULL,NULL, 272 "-c prints all mbuf chains") }, 273 { DDB_ADD_CMD("ncache", db_namecache_print_cmd, 0, 274 "Dump the namecache list.", "address",NULL) }, 275 { DDB_ADD_CMD("object", db_object_print_cmd, 0, 276 "Print the vm_object at address.", "[/f] address",NULL) }, 277 { DDB_ADD_CMD("page", db_page_print_cmd, 0, 278 "Print the vm_page at address.", "[/f] address",NULL) }, 279 { DDB_ADD_CMD("panic", db_show_panic, 0, 280 "Print the current panic string",NULL,NULL) }, 281 { DDB_ADD_CMD("pool", db_pool_print_cmd, 0, 282 "Print the pool at address.", "[/clp] address",NULL) }, 283 { DDB_ADD_CMD("registers", db_show_regs, 0, 284 "Display the register set.", "[/u]",NULL) }, 285 { DDB_ADD_CMD("sched_qs", db_show_sched_qs, 0, 286 "Print the state of the scheduler's run queues.", 287 NULL,NULL) }, 288 { DDB_ADD_CMD("uvmexp", db_uvmexp_print_cmd, 0, 289 "Print a selection of UVM counters and statistics.", 290 NULL,NULL) }, 291 #ifdef KERNHIST 292 { DDB_ADD_CMD("kernhist", db_kernhist_print_cmd, 0, 293 "Print the UVM history logs.", 294 NULL,NULL) }, 295 #endif 296 { DDB_ADD_CMD("vnode", db_vnode_print_cmd, 0, 297 "Print the vnode at address.", "[/f] address",NULL) }, 298 { DDB_ADD_CMD("vnode_lock", db_vnode_lock_print_cmd, 0, 299 "Print the vnode having that address as v_lock.", 300 "[/f] address",NULL) }, 301 { DDB_ADD_CMD("vmem", db_vmem_print_cmd, 0, 302 "Print the vmem usage.", "[/a] address", NULL) }, 303 { DDB_ADD_CMD("vmems", db_show_all_vmems, 0, 304 "Show all vmems.", NULL, NULL) }, 305 #ifdef _KERNEL 306 { DDB_ADD_CMD("watches", db_listwatch_cmd, 0, 307 "Display all watchpoints.", NULL,NULL) }, 308 #endif 309 { DDB_ADD_CMD(NULL, NULL, 0,NULL,NULL,NULL) } 310 }; 311 312 static const struct db_command db_command_table[] = { 313 { DDB_ADD_CMD("b", db_breakpoint_cmd, 0, 314 "Set a breakpoint at address", "[/u] address[,count].",NULL) }, 315 { DDB_ADD_CMD("break", db_breakpoint_cmd, 0, 316 "Set a breakpoint at address", "[/u] address[,count].",NULL) }, 317 { DDB_ADD_CMD("bt", db_stack_trace_cmd, 0, 318 "Show backtrace.", "See help trace.",NULL) }, 319 { DDB_ADD_CMD("c", db_continue_cmd, 0, 320 "Continue execution.", "[/c]",NULL) }, 321 { DDB_ADD_CMD("call", db_fncall, CS_OWN, 322 "Call the function", "address[(expression[,...])]",NULL) }, 323 { DDB_ADD_CMD("callout", db_show_callout, 0, NULL, 324 NULL,NULL ) }, 325 { DDB_ADD_CMD("continue", db_continue_cmd, 0, 326 "Continue execution.", "[/c]",NULL) }, 327 { DDB_ADD_CMD("d", db_delete_cmd, 0, 328 "Delete a breakpoint.", "address | #number",NULL) }, 329 { DDB_ADD_CMD("delete", db_delete_cmd, 0, 330 "Delete a breakpoint.", "address | #number",NULL) }, 331 { DDB_ADD_CMD("dmesg", db_dmesg, 0, 332 "Show kernel message buffer.", "[count]",NULL) }, 333 { DDB_ADD_CMD("dwatch", db_deletewatch_cmd, 0, 334 "Delete the watchpoint.", "address",NULL) }, 335 { DDB_ADD_CMD("examine", db_examine_cmd, CS_SET_DOT, 336 "Display the address locations.", 337 "[/modifier] address[,count]",NULL) }, 338 { DDB_ADD_CMD("exit", db_continue_cmd, 0, 339 "Continue execution.", "[/c]",NULL) }, 340 { DDB_ADD_CMD("help", db_help_print_cmd, CS_OWN|CS_NOREPEAT, 341 "Display help about commands", 342 "Use other commands as arguments.",NULL) }, 343 { DDB_ADD_CMD("kill", db_kill_proc, CS_OWN, 344 "Send a signal to the process","pid[,signal_number]", 345 " pid:\t\t\tthe process id (may need 0t prefix for decimal)\n" 346 " signal_number:\tthe signal to send") }, 347 #ifdef KGDB 348 { DDB_ADD_CMD("kgdb", db_kgdb_cmd, 0, NULL,NULL,NULL) }, 349 #endif 350 { DDB_ADD_CMD("machine",NULL,CS_MACH, 351 "Architecture specific functions.",NULL,NULL) }, 352 { DDB_ADD_CMD("match", db_trace_until_matching_cmd,0, 353 "Stop at the matching return instruction.","See help next",NULL) }, 354 { DDB_ADD_CMD("next", db_trace_until_matching_cmd,0, 355 "Stop at the matching return instruction.","[/p]",NULL) }, 356 { DDB_ADD_CMD("p", db_print_cmd, 0, 357 "Print address according to the format.", 358 "[/axzodurc] address [address ...]",NULL) }, 359 { DDB_ADD_CMD("print", db_print_cmd, 0, 360 "Print address according to the format.", 361 "[/axzodurc] address [address ...]",NULL) }, 362 { DDB_ADD_CMD("ps", db_show_all_procs, 0, 363 "Print all processes.","See show all procs",NULL) }, 364 { DDB_ADD_CMD("quit", db_continue_cmd, 0, 365 "Continue execution.", "[/c]",NULL) }, 366 { DDB_ADD_CMD("reboot", db_reboot_cmd, CS_OWN, 367 "Reboot","0x1 RB_ASKNAME, 0x2 RB_SINGLE, 0x4 RB_NOSYNC, 0x8 RB_HALT," 368 "0x40 RB_KDB, 0x100 RB_DUMP, 0x808 RB_POWERDOWN",NULL) }, 369 { DDB_ADD_CMD("s", db_single_step_cmd, 0, 370 "Single-step count times.","[/p] [,count]",NULL) }, 371 { DDB_ADD_CMD("search", db_search_cmd, CS_OWN|CS_SET_DOT, 372 "Search memory from address for value.", 373 "[/bhl] address value [mask] [,count]",NULL) }, 374 { DDB_ADD_CMD("set", db_set_cmd, CS_OWN, 375 "Set the named variable","$variable [=] expression",NULL) }, 376 { DDB_ADD_CMD("show", NULL, CS_SHOW, 377 "Show kernel stats.", NULL,NULL) }, 378 { DDB_ADD_CMD("sifting", db_sifting_cmd, CS_OWN, 379 "Search the symbol tables ","[/F] string",NULL) }, 380 { DDB_ADD_CMD("step", db_single_step_cmd, 0, 381 "Single-step count times.","[/p] [,count]",NULL) }, 382 { DDB_ADD_CMD("sync", db_sync_cmd, CS_OWN, 383 "Force a crash dump, and then reboot.",NULL,NULL) }, 384 { DDB_ADD_CMD("trace", db_stack_trace_cmd, 0, 385 "Stack trace from frame-address.", 386 "[/u[l]] [frame-address][,count]",NULL) }, 387 { DDB_ADD_CMD("until", db_trace_until_call_cmd,0, 388 "Stop at the next call or return instruction.","[/p]",NULL) }, 389 { DDB_ADD_CMD("w", db_write_cmd, CS_MORE|CS_SET_DOT, 390 "Write the expressions at succeeding locations.", 391 "[/bhl] address expression [expression ...]",NULL) }, 392 { DDB_ADD_CMD("watch", db_watchpoint_cmd, CS_MORE, 393 "Set a watchpoint for a region. ","address[,size]",NULL) }, 394 { DDB_ADD_CMD("whatis", db_whatis_cmd, 0, 395 "Describe what an address is", "address", NULL) }, 396 { DDB_ADD_CMD("write", db_write_cmd, CS_MORE|CS_SET_DOT, 397 "Write the expressions at succeeding locations.", 398 "[/bhl] address expression [expression ...]",NULL) }, 399 { DDB_ADD_CMD("x", db_examine_cmd, CS_SET_DOT, 400 "Display the address locations.", 401 "[/modifier] address[,count]",NULL) }, 402 { DDB_ADD_CMD(NULL, NULL, 0, NULL, NULL, NULL) } 403 }; 404 405 static const struct db_command *db_last_command = NULL; 406 #if defined(DDB_COMMANDONENTER) 407 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 408 #else /* defined(DDB_COMMANDONENTER) */ 409 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 410 #endif /* defined(DDB_COMMANDONENTER) */ 411 #define DB_LINE_SEP ';' 412 413 /* 414 * Execute commandlist after ddb start 415 * This function goes through the command list created from commands and ';' 416 */ 417 static void 418 db_execute_commandlist(const char *cmdlist) 419 { 420 const char *cmd = cmdlist; 421 const struct db_command *dummy = NULL; 422 423 while (*cmd != '\0') { 424 const char *ep = cmd; 425 426 while (*ep != '\0' && *ep != DB_LINE_SEP) { 427 ep++; 428 } 429 db_set_line(cmd, ep); 430 db_command(&dummy); 431 cmd = ep; 432 if (*cmd == DB_LINE_SEP) { 433 cmd++; 434 } 435 } 436 } 437 438 /* Initialize ddb command tables */ 439 void 440 db_init_commands(void) 441 { 442 static bool done = false; 443 444 if (done) return; 445 done = true; 446 447 /* register command tables */ 448 (void)db_register_tbl_entry(DDB_BASE_CMD, &db_base_cmd_builtins); 449 #ifdef DB_MACHINE_COMMANDS 450 (void)db_register_tbl_entry(DDB_MACH_CMD, &db_mach_cmd_builtins); 451 #endif 452 (void)db_register_tbl_entry(DDB_SHOW_CMD, &db_show_cmd_builtins); 453 } 454 455 456 /* 457 * Add command table to the specified list 458 * Arg: 459 * int type specifies type of command table DDB_SHOW_CMD|DDB_BASE_CMD|DDB_MAC_CMD 460 * *cmd_tbl poiter to static allocated db_command table 461 * 462 * Command table must be NULL terminated array of struct db_command 463 */ 464 int 465 db_register_tbl(uint8_t type, const struct db_command *cmd_tbl) 466 { 467 struct db_cmd_tbl_en *list_ent; 468 469 /* empty list - ignore */ 470 if (cmd_tbl->name == 0) 471 return 0; 472 473 /* force builtin commands to be registered first */ 474 db_init_commands(); 475 476 /* now create a list entry for this table */ 477 list_ent = db_zalloc(sizeof(*list_ent)); 478 if (list_ent == NULL) 479 return ENOMEM; 480 list_ent->db_cmd=cmd_tbl; 481 482 /* and register it */ 483 return db_register_tbl_entry(type, list_ent); 484 } 485 486 static int 487 db_register_tbl_entry(uint8_t type, struct db_cmd_tbl_en *list_ent) 488 { 489 struct db_cmd_tbl_en_head *list; 490 491 switch(type) { 492 case DDB_BASE_CMD: 493 list = &db_base_cmd_list; 494 break; 495 case DDB_SHOW_CMD: 496 list = &db_show_cmd_list; 497 break; 498 case DDB_MACH_CMD: 499 list = &db_mach_cmd_list; 500 break; 501 default: 502 return ENOENT; 503 } 504 505 TAILQ_INSERT_TAIL(list, list_ent, db_cmd_next); 506 507 return 0; 508 } 509 510 /* 511 * Remove command table specified with db_cmd address == cmd_tbl 512 */ 513 int 514 db_unregister_tbl(uint8_t type,const struct db_command *cmd_tbl) 515 { 516 struct db_cmd_tbl_en *list_ent; 517 struct db_cmd_tbl_en_head *list; 518 519 /* find list on which the entry should live */ 520 switch (type) { 521 case DDB_BASE_CMD: 522 list=&db_base_cmd_list; 523 break; 524 case DDB_SHOW_CMD: 525 list=&db_show_cmd_list; 526 break; 527 case DDB_MACH_CMD: 528 list=&db_mach_cmd_list; 529 break; 530 default: 531 return EINVAL; 532 } 533 534 TAILQ_FOREACH (list_ent, list, db_cmd_next) { 535 if (list_ent->db_cmd == cmd_tbl){ 536 TAILQ_REMOVE(list, 537 list_ent, db_cmd_next); 538 db_free(list_ent, sizeof(*list_ent)); 539 return 0; 540 } 541 } 542 return ENOENT; 543 } 544 545 /* This function is called from machine trap code. */ 546 void 547 db_command_loop(void) 548 { 549 label_t db_jmpbuf; 550 label_t *savejmp; 551 552 /* 553 * Initialize 'prev' and 'next' to dot. 554 */ 555 db_prev = db_dot; 556 db_next = db_dot; 557 558 db_cmd_loop_done = false; 559 560 /* Init default command tables add machine, base, 561 show command tables to the list */ 562 db_init_commands(); 563 564 /* save context for return from ddb */ 565 savejmp = db_recover; 566 db_recover = &db_jmpbuf; 567 (void) setjmp(&db_jmpbuf); 568 569 /* 570 * Execute default ddb start commands only if this is the 571 * first entry into DDB, in case the start commands fault 572 * and we recurse into here. 573 */ 574 if (!savejmp) 575 db_execute_commandlist(db_cmd_on_enter); 576 577 (void) setjmp(&db_jmpbuf); 578 while (!db_cmd_loop_done) { 579 if (db_print_position() != 0) 580 db_printf("\n"); 581 db_output_line = 0; 582 (void) db_read_line(); 583 db_command(&db_last_command); 584 } 585 586 db_recover = savejmp; 587 } 588 589 /* 590 * Search command table for command prefix 591 */ 592 static int 593 db_cmd_search_table(const char *name, 594 const struct db_command *table, 595 const struct db_command **cmdp) 596 { 597 598 const struct db_command *cmd; 599 int result; 600 601 result = CMD_NONE; 602 *cmdp = NULL; 603 604 for (cmd = table; cmd->name != 0; cmd++) { 605 const char *lp; 606 const char *rp; 607 608 lp = name; 609 rp = cmd->name; 610 while (*lp != '\0' && *lp == *rp) { 611 rp++; 612 lp++; 613 } 614 615 if (*lp != '\0') /* mismatch or extra chars in name */ 616 continue; 617 618 if (*rp == '\0') { /* exact match */ 619 *cmdp = cmd; 620 return (CMD_EXACT); 621 } 622 623 /* prefix match: end of name, not end of command */ 624 if (result == CMD_NONE) { 625 result = CMD_PREFIX; 626 *cmdp = cmd; 627 } 628 else if (result == CMD_PREFIX) { 629 result = CMD_AMBIGUOUS; 630 *cmdp = NULL; 631 } 632 } 633 634 return (result); 635 } 636 637 638 /* 639 * Search list of command tables for command 640 */ 641 static int 642 db_cmd_search(const char *name, 643 struct db_cmd_tbl_en_head *list_head, 644 const struct db_command **cmdp) 645 { 646 struct db_cmd_tbl_en *list_ent; 647 const struct db_command *found_command; 648 bool accept_prefix_match; 649 int result; 650 651 result = CMD_NONE; 652 found_command = NULL; 653 accept_prefix_match = true; 654 655 TAILQ_FOREACH(list_ent, list_head, db_cmd_next) { 656 const struct db_command *cmd; 657 int found; 658 659 found = db_cmd_search_table(name, list_ent->db_cmd, &cmd); 660 if (found == CMD_EXACT) { 661 result = CMD_EXACT; 662 found_command = cmd; 663 break; 664 } 665 666 if (found == CMD_PREFIX) { 667 if (accept_prefix_match) { 668 /* 669 * Continue search, but note current result 670 * in case we won't find anything else. 671 */ 672 accept_prefix_match = false; 673 result = CMD_PREFIX; 674 found_command = cmd; 675 } else { 676 /* 677 * Watch out for globally ambiguous 678 * prefix match that is not locally 679 * ambiguous - with one match in one 680 * table and another match(es) in 681 * another table. 682 */ 683 result = CMD_AMBIGUOUS; 684 found_command = NULL; 685 } 686 } 687 else if (found == CMD_AMBIGUOUS) { 688 accept_prefix_match = false; 689 result = CMD_AMBIGUOUS; 690 found_command = NULL; 691 } 692 } 693 694 *cmdp = found_command; 695 return result; 696 } 697 698 static void 699 db_cmd_search_failed(char *name, int search_result) 700 { 701 if (search_result == CMD_NONE) 702 db_printf("No such command: %s\n", name); 703 else 704 db_printf("Ambiguous command: %s\n", name); 705 } 706 707 708 /* 709 * List commands to the console. 710 */ 711 static void 712 db_cmd_list(const struct db_cmd_tbl_en_head *list) 713 { 714 715 struct db_cmd_tbl_en *list_ent; 716 const struct db_command *table; 717 size_t i, j, w, columns, lines, numcmds, width=0; 718 const char *p; 719 720 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 721 table = list_ent->db_cmd; 722 for (i = 0; table[i].name != NULL; i++) { 723 w = strlen(table[i].name); 724 if (w > width) 725 width = w; 726 } 727 } 728 729 width = DB_NEXT_TAB(width); 730 731 columns = db_max_width / width; 732 if (columns == 0) 733 columns = 1; 734 735 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 736 table = list_ent->db_cmd; 737 738 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) 739 ; 740 lines = (numcmds + columns - 1) / columns; 741 742 for (i = 0; i < lines; i++) { 743 for (j = 0; j < columns; j++) { 744 p = table[j * lines + i].name; 745 if (p) 746 db_printf("%s", p); 747 if (j * lines + i + lines >= numcmds) { 748 db_putchar('\n'); 749 break; 750 } 751 if (p) { 752 w = strlen(p); 753 while (w < width) { 754 w = DB_NEXT_TAB(w); 755 db_putchar('\t'); 756 } 757 } 758 } 759 } 760 } 761 return; 762 } 763 764 /* 765 * Read complete command with all subcommands, starting with current 766 * db_tok_string. If subcommand is missing, print the list of all 767 * subcommands. If command/subcommand is not found, print an error 768 * message. Returns pointer to "leaf" command or NULL. 769 */ 770 static const struct db_command * 771 db_read_command(void) 772 { 773 const struct db_command *command; 774 struct db_cmd_tbl_en_head *list; 775 int found; 776 int t; 777 778 list = &db_base_cmd_list; 779 do { 780 found = db_cmd_search(db_tok_string, list, &command); 781 if (command == NULL) { 782 db_cmd_search_failed(db_tok_string, found); 783 db_flush_lex(); 784 return NULL; 785 } 786 787 if (command->flag == CS_SHOW) 788 list = &db_show_cmd_list; 789 else if (command->flag == CS_MACH) 790 list = &db_mach_cmd_list; 791 else if (command->flag == CS_COMPAT) 792 /* same list */; 793 else 794 break; /* expect no more subcommands */ 795 796 t = db_read_token(); /* read subcommand */ 797 if (t != tIDENT) { 798 /* if none given - just print all of them */ 799 db_cmd_list(list); 800 db_flush_lex(); 801 return NULL; 802 } 803 } while (list != NULL); 804 805 return command; 806 } 807 808 /* 809 * Parse command line and execute apropriate function. 810 */ 811 static void 812 db_command(const struct db_command **last_cmdp) 813 { 814 const struct db_command *command; 815 static db_expr_t last_count = 0; 816 db_expr_t addr, count; 817 char modif[TOK_STRING_SIZE]; 818 819 int t; 820 bool have_addr = false; 821 822 command = NULL; 823 824 t = db_read_token(); 825 if ((t == tEOL) || (t == tCOMMA)) { 826 /* 827 * An empty line repeats last command, at 'next'. 828 * Only a count repeats the last command with the new count. 829 */ 830 command = *last_cmdp; 831 832 if (!command) 833 return; 834 835 addr = (db_expr_t)db_next; 836 if (t == tCOMMA) { 837 if (!db_expression(&count)) { 838 db_printf("Count missing\n"); 839 db_flush_lex(); 840 return; 841 } 842 } else 843 count = last_count; 844 have_addr = false; 845 modif[0] = '\0'; 846 db_skip_to_eol(); 847 848 } else if (t == tEXCL) { 849 db_fncall(0, 0, 0, NULL); 850 return; 851 852 } else if (t != tIDENT) { 853 db_printf("?\n"); 854 db_flush_lex(); 855 return; 856 857 } else { 858 859 command = db_read_command(); 860 if (command == NULL) 861 return; 862 863 if ((command->flag & CS_OWN) == 0) { 864 865 /* 866 * Standard syntax: 867 * command [/modifier] [addr] [,count] 868 */ 869 t = db_read_token(); /* get modifier */ 870 if (t == tSLASH) { 871 t = db_read_token(); 872 if (t != tIDENT) { 873 db_printf("Bad modifier\n"); 874 db_flush_lex(); 875 return; 876 } 877 /* save modifier */ 878 strlcpy(modif, db_tok_string, sizeof(modif)); 879 880 } else { 881 db_unread_token(t); 882 modif[0] = '\0'; 883 } 884 885 if (db_expression(&addr)) { /*get address*/ 886 db_dot = (db_addr_t) addr; 887 db_last_addr = db_dot; 888 have_addr = true; 889 } else { 890 addr = (db_expr_t) db_dot; 891 have_addr = false; 892 } 893 894 t = db_read_token(); 895 if (t == tCOMMA) { /*Get count*/ 896 if (!db_expression(&count)) { 897 db_printf("Count missing\n"); 898 db_flush_lex(); 899 return; 900 } 901 } else { 902 db_unread_token(t); 903 count = -1; 904 } 905 if ((command->flag & CS_MORE) == 0) { 906 db_skip_to_eol(); 907 } 908 } 909 } 910 911 if (command != NULL && command->flag & CS_NOREPEAT) { 912 *last_cmdp = NULL; 913 last_count = 0; 914 } else { 915 *last_cmdp = command; 916 last_count = count; 917 } 918 919 920 if (command != NULL) { 921 /* 922 * Execute the command. 923 */ 924 if (command->fcn != NULL) 925 (*command->fcn)(addr, have_addr, count, modif); 926 927 if (command->flag & CS_SET_DOT) { 928 /* 929 * If command changes dot, set dot to 930 * previous address displayed (if 'ed' style). 931 */ 932 if (db_ed_style) 933 db_dot = db_prev; 934 else 935 db_dot = db_next; 936 } else { 937 /* 938 * If command does not change dot, 939 * set 'next' location to be the same. 940 */ 941 db_next = db_dot; 942 } 943 } 944 } 945 946 /* 947 * Print help for commands 948 */ 949 static void 950 db_help_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 951 const char *modif) 952 { 953 const struct db_command *command; 954 int t; 955 956 t = db_read_token(); 957 958 /* is there another command after the "help"? */ 959 if (t != tIDENT) { 960 /* print base commands */ 961 db_cmd_list(&db_base_cmd_list); 962 return; 963 } 964 965 command = db_read_command(); 966 if (command == NULL) 967 return; 968 969 #ifdef DDB_VERBOSE_HELP 970 db_printf("Command: %s\n", command->name); 971 if (command->cmd_descr != NULL) 972 db_printf(" Description: %s\n", command->cmd_descr); 973 if (command->cmd_arg != NULL) 974 db_printf(" Arguments: %s\n", command->cmd_arg); 975 if (command->cmd_arg_help != NULL) 976 db_printf(" Arguments description:\n%s\n", 977 command->cmd_arg_help); 978 if ((command->cmd_arg == NULL) && (command->cmd_descr == NULL)) 979 db_printf(" No help message.\n"); 980 #endif 981 982 db_skip_to_eol(); 983 } 984 985 /*ARGSUSED*/ 986 static void 987 db_map_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 988 const char *modif) 989 { 990 #ifdef _KERNEL 991 bool full = false; 992 993 if (modif[0] == 'f') 994 full = true; 995 996 if (have_addr == false) 997 addr = (db_expr_t)(uintptr_t)db_read_ptr("kernel_map"); 998 999 uvm_map_printit((struct vm_map *)(uintptr_t) addr, full, db_printf); 1000 #endif /* XXX CRASH(8) */ 1001 } 1002 1003 /*ARGSUSED*/ 1004 static void 1005 db_object_print_cmd(db_expr_t addr, bool have_addr, 1006 db_expr_t count, const char *modif) 1007 { 1008 #ifdef _KERNEL /* XXX CRASH(8) */ 1009 bool full = false; 1010 1011 if (modif[0] == 'f') 1012 full = true; 1013 1014 uvm_object_printit((struct uvm_object *)(uintptr_t) addr, full, 1015 db_printf); 1016 #endif 1017 } 1018 1019 /*ARGSUSED*/ 1020 static void 1021 db_page_print_cmd(db_expr_t addr, bool have_addr, 1022 db_expr_t count, const char *modif) 1023 { 1024 #ifdef _KERNEL /* XXX CRASH(8) */ 1025 bool full = false; 1026 1027 if (modif[0] == 'f') 1028 full = true; 1029 1030 uvm_page_printit((struct vm_page *)(uintptr_t) addr, full, db_printf); 1031 #endif 1032 } 1033 1034 /*ARGSUSED*/ 1035 static void 1036 db_show_all_pages(db_expr_t addr, bool have_addr, 1037 db_expr_t count, const char *modif) 1038 { 1039 1040 #ifdef _KERNEL /* XXX CRASH(8) */ 1041 uvm_page_printall(db_printf); 1042 #endif 1043 } 1044 1045 /*ARGSUSED*/ 1046 static void 1047 db_buf_print_cmd(db_expr_t addr, bool have_addr, 1048 db_expr_t count, const char *modif) 1049 { 1050 #ifdef _KERNEL /* XXX CRASH(8) */ 1051 bool full = false; 1052 1053 if (modif[0] == 'f') 1054 full = true; 1055 1056 vfs_buf_print((struct buf *)(uintptr_t) addr, full, db_printf); 1057 #endif 1058 } 1059 1060 /*ARGSUSED*/ 1061 static void 1062 db_event_print_cmd(db_expr_t addr, bool have_addr, 1063 db_expr_t count, const char *modif) 1064 { 1065 bool showzero = false; 1066 bool showall = true; 1067 bool showintr = false; 1068 bool showtrap = false; 1069 bool showmisc = false; 1070 struct evcnt ev, *evp; 1071 char buf[80]; 1072 int i; 1073 1074 i = 0; 1075 while (modif[i]) { 1076 switch (modif[i]) { 1077 case 'f': 1078 showzero = true; 1079 break; 1080 case 'i': 1081 showintr = true; 1082 showall = false; 1083 break; 1084 case 't': 1085 showtrap = true; 1086 showall = false; 1087 break; 1088 case 'm': 1089 showmisc = true; 1090 showall = false; 1091 break; 1092 } 1093 i++; 1094 } 1095 1096 if (showall) 1097 showmisc = showintr = showtrap = true; 1098 1099 evp = (struct evcnt *)db_read_ptr("allevents"); 1100 while (evp != NULL) { 1101 db_read_bytes((db_addr_t)evp, sizeof(ev), (char *)&ev); 1102 evp = ev.ev_list.tqe_next; 1103 if (ev.ev_count == 0 && !showzero) 1104 continue; 1105 if (ev.ev_type == EVCNT_TYPE_INTR && !showintr) 1106 continue; 1107 if (ev.ev_type == EVCNT_TYPE_TRAP && !showtrap) 1108 continue; 1109 if (ev.ev_type == EVCNT_TYPE_MISC && !showmisc) 1110 continue; 1111 db_read_bytes((db_addr_t)ev.ev_group, ev.ev_grouplen + 1, buf); 1112 db_printf("evcnt type %d: %s ", ev.ev_type, buf); 1113 db_read_bytes((db_addr_t)ev.ev_name, ev.ev_namelen + 1, buf); 1114 db_printf("%s = %lld\n", buf, (long long)ev.ev_count); 1115 } 1116 } 1117 1118 /*ARGSUSED*/ 1119 static void 1120 db_vnode_print_cmd(db_expr_t addr, bool have_addr, 1121 db_expr_t count, const char *modif) 1122 { 1123 #ifdef _KERNEL /* XXX CRASH(8) */ 1124 bool full = false; 1125 1126 if (modif[0] == 'f') 1127 full = true; 1128 1129 vfs_vnode_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1130 #endif 1131 } 1132 1133 /*ARGSUSED*/ 1134 static void 1135 db_vnode_lock_print_cmd(db_expr_t addr, bool have_addr, 1136 db_expr_t count, const char *modif) 1137 { 1138 #ifdef _KERNEL /* XXX CRASH(8) */ 1139 bool full = false; 1140 1141 if (modif[0] == 'f') 1142 full = true; 1143 1144 vfs_vnode_lock_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1145 #endif 1146 } 1147 1148 /*ARGSUSED*/ 1149 static void 1150 db_vmem_print_cmd(db_expr_t addr, bool have_addr, 1151 db_expr_t count, const char *modif) 1152 { 1153 1154 #ifdef _KERNEL /* XXX CRASH(8) */ 1155 vmem_print((uintptr_t) addr, modif, db_printf); 1156 #endif 1157 } 1158 1159 static void 1160 db_mount_print_cmd(db_expr_t addr, bool have_addr, 1161 db_expr_t count, const char *modif) 1162 { 1163 #ifdef _KERNEL /* XXX CRASH(8) */ 1164 bool full = false; 1165 1166 if (modif[0] == 'f') 1167 full = true; 1168 1169 vfs_mount_print((struct mount *)(uintptr_t) addr, full, db_printf); 1170 #endif 1171 } 1172 1173 /*ARGSUSED*/ 1174 static void 1175 db_mbuf_print_cmd(db_expr_t addr, bool have_addr, 1176 db_expr_t count, const char *modif) 1177 { 1178 1179 #ifdef _KERNEL /* XXX CRASH(8) */ 1180 m_print((const struct mbuf *)(uintptr_t) addr, modif, db_printf); 1181 #endif 1182 } 1183 1184 /*ARGSUSED*/ 1185 static void 1186 db_pool_print_cmd(db_expr_t addr, bool have_addr, 1187 db_expr_t count, const char *modif) 1188 { 1189 1190 #ifdef _KERNEL /* XXX CRASH(8) */ 1191 pool_printit((struct pool *)(uintptr_t) addr, modif, db_printf); 1192 #endif 1193 } 1194 1195 /*ARGSUSED*/ 1196 static void 1197 db_namecache_print_cmd(db_expr_t addr, bool have_addr, 1198 db_expr_t count, const char *modif) 1199 { 1200 1201 #ifdef _KERNEL /* XXX CRASH(8) */ 1202 namecache_print((struct vnode *)(uintptr_t) addr, db_printf); 1203 #endif 1204 } 1205 1206 /*ARGSUSED*/ 1207 static void 1208 db_uvmexp_print_cmd(db_expr_t addr, bool have_addr, 1209 db_expr_t count, const char *modif) 1210 { 1211 1212 #ifdef _KERNEL /* XXX CRASH(8) */ 1213 uvmexp_print(db_printf); 1214 #endif 1215 } 1216 1217 /*ARGSUSED */ 1218 static void 1219 db_socket_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 1220 const char *modif) 1221 { 1222 1223 #ifdef _KERNEL /* XXX CRASH(8) */ 1224 socket_print(modif, db_printf); 1225 #endif 1226 } 1227 1228 #ifdef KERNHIST 1229 /*ARGSUSED*/ 1230 static void 1231 db_kernhist_print_cmd(db_expr_t addr, bool have_addr, 1232 db_expr_t count, const char *modif) 1233 { 1234 1235 kernhist_print((void *)(uintptr_t)addr, count, modif, db_printf); 1236 } 1237 #endif 1238 1239 /*ARGSUSED*/ 1240 static void 1241 db_lock_print_cmd(db_expr_t addr, bool have_addr, 1242 db_expr_t count, const char *modif) 1243 { 1244 1245 #ifdef _KERNEL /* XXX CRASH(8) */ 1246 lockdebug_lock_print(have_addr ? (void *)(uintptr_t)addr : NULL, 1247 db_printf); 1248 #endif 1249 } 1250 1251 static void 1252 db_show_all_locks(db_expr_t addr, bool have_addr, 1253 db_expr_t count, const char *modif) 1254 { 1255 1256 #ifdef _KERNEL /* XXX CRASH(8) */ 1257 lockdebug_show_all_locks(db_printf, modif); 1258 #endif 1259 } 1260 1261 static void 1262 db_show_lockstats(db_expr_t addr, bool have_addr, 1263 db_expr_t count, const char *modif) 1264 { 1265 1266 #ifdef _KERNEL /* XXX CRASH(8) */ 1267 lockdebug_show_lockstats(db_printf); 1268 #endif 1269 } 1270 1271 /* 1272 * Call random function: 1273 * !expr(arg,arg,arg) 1274 */ 1275 /*ARGSUSED*/ 1276 static void 1277 db_fncall(db_expr_t addr, bool have_addr, 1278 db_expr_t count, const char *modif) 1279 { 1280 #ifdef _KERNEL 1281 db_expr_t fn_addr; 1282 #define MAXARGS 11 1283 db_expr_t args[MAXARGS]; 1284 int nargs = 0; 1285 db_expr_t retval; 1286 db_expr_t (*func)(db_expr_t, ...); 1287 int t; 1288 1289 if (!db_expression(&fn_addr)) { 1290 db_printf("Bad function\n"); 1291 db_flush_lex(); 1292 return; 1293 } 1294 func = (db_expr_t (*)(db_expr_t, ...))(uintptr_t) fn_addr; 1295 1296 t = db_read_token(); 1297 if (t == tLPAREN) { 1298 if (db_expression(&args[0])) { 1299 nargs++; 1300 while ((t = db_read_token()) == tCOMMA) { 1301 if (nargs == MAXARGS) { 1302 db_printf("Too many arguments\n"); 1303 db_flush_lex(); 1304 return; 1305 } 1306 if (!db_expression(&args[nargs])) { 1307 db_printf("Argument missing\n"); 1308 db_flush_lex(); 1309 return; 1310 } 1311 nargs++; 1312 } 1313 db_unread_token(t); 1314 } 1315 if (db_read_token() != tRPAREN) { 1316 db_printf("?\n"); 1317 db_flush_lex(); 1318 return; 1319 } 1320 } 1321 db_skip_to_eol(); 1322 1323 while (nargs < MAXARGS) { 1324 args[nargs++] = 0; 1325 } 1326 1327 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 1328 args[5], args[6], args[7], args[8], args[9]); 1329 db_printf("%s\n", db_num_to_str(retval)); 1330 #else /* _KERNEL */ 1331 db_printf("This command can only be used in-kernel.\n"); 1332 #endif /* _KERNEL */ 1333 } 1334 1335 static void 1336 db_reboot_cmd(db_expr_t addr, bool have_addr, 1337 db_expr_t count, const char *modif) 1338 { 1339 #ifdef _KERNEL 1340 db_expr_t bootflags; 1341 1342 /* Flags, default to RB_AUTOBOOT */ 1343 if (!db_expression(&bootflags)) 1344 bootflags = (db_expr_t)RB_AUTOBOOT; 1345 if (db_read_token() != tEOL) { 1346 db_error("?\n"); 1347 /*NOTREACHED*/ 1348 } 1349 /* 1350 * We are leaving DDB, never to return upward. 1351 * Clear db_recover so that we can debug faults in functions 1352 * called from cpu_reboot. 1353 */ 1354 db_recover = 0; 1355 /* Avoid all mutex errors */ 1356 lockdebug_dismiss(); 1357 panicstr = "reboot forced via kernel debugger"; 1358 /* Make it possible to break into the debugger again */ 1359 spl0(); 1360 cpu_reboot((int)bootflags, NULL); 1361 #else /* _KERNEL */ 1362 db_printf("This command can only be used in-kernel.\n"); 1363 #endif /* _KERNEL */ 1364 } 1365 1366 static void 1367 db_sifting_cmd(db_expr_t addr, bool have_addr, 1368 db_expr_t count, const char *modif) 1369 { 1370 int mode, t; 1371 1372 t = db_read_token(); 1373 if (t == tSLASH) { 1374 t = db_read_token(); 1375 if (t != tIDENT) { 1376 bad_modifier: 1377 db_printf("Bad modifier\n"); 1378 db_flush_lex(); 1379 return; 1380 } 1381 if (!strcmp(db_tok_string, "F")) 1382 mode = 'F'; 1383 else 1384 goto bad_modifier; 1385 t = db_read_token(); 1386 } else 1387 mode = 0; 1388 1389 if (t == tIDENT) 1390 db_sifting(db_tok_string, mode); 1391 else { 1392 db_printf("Bad argument (non-string)\n"); 1393 db_flush_lex(); 1394 } 1395 } 1396 1397 static void 1398 db_stack_trace_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) 1399 { 1400 register const char *cp = modif; 1401 register char c; 1402 void (*pr)(const char *, ...); 1403 1404 pr = db_printf; 1405 while ((c = *cp++) != 0) 1406 if (c == 'l') 1407 pr = (void (*)(const char *, ...))printf; 1408 1409 if (count == -1) 1410 count = 65535; 1411 1412 db_stack_trace_print(addr, have_addr, count, modif, pr); 1413 } 1414 1415 static void 1416 db_sync_cmd(db_expr_t addr, bool have_addr, 1417 db_expr_t count, const char *modif) 1418 { 1419 #ifdef _KERNEL 1420 /* 1421 * We are leaving DDB, never to return upward. 1422 * Clear db_recover so that we can debug faults in functions 1423 * called from cpu_reboot. 1424 */ 1425 db_recover = 0; 1426 panicstr = "dump forced via kernel debugger"; 1427 cpu_reboot(RB_DUMP, NULL); 1428 #else /* _KERNEL */ 1429 db_printf("This command can only be used in-kernel.\n"); 1430 #endif /* _KERNEL */ 1431 } 1432 1433 /* 1434 * Describe what an address is 1435 */ 1436 void 1437 db_whatis_cmd(db_expr_t address, bool have_addr, 1438 db_expr_t count, const char *modif) 1439 { 1440 const uintptr_t addr = (uintptr_t)address; 1441 1442 db_lwp_whatis(addr, db_printf); 1443 #ifdef _KERNEL /* XXX CRASH(8) */ 1444 pool_whatis(addr, db_printf); 1445 vmem_whatis(addr, db_printf); 1446 uvm_whatis(addr, db_printf); 1447 module_whatis(addr, db_printf); 1448 #endif 1449 } 1450
Indexes created Sun Sep 21 18:09:52 GMT 2025