db_command.c revision 1.159
1 /* $NetBSD: db_command.c,v 1.159 2018/09/16 23:18:55 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 1.159 2018/09/16 23:18:55 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 #include <sys/queue.h> 94 95 #include <dev/cons.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 /* 546 * This function is called via db_trap() or directly from 547 * machine trap code. 548 */ 549 void 550 db_command_loop(void) 551 { 552 label_t db_jmpbuf; 553 label_t *savejmp; 554 555 /* 556 * Initialize 'prev' and 'next' to dot. 557 */ 558 db_prev = db_dot; 559 db_next = db_dot; 560 561 db_cmd_loop_done = false; 562 563 /* Init default command tables add machine, base, 564 show command tables to the list */ 565 db_init_commands(); 566 567 /* save context for return from ddb */ 568 savejmp = db_recover; 569 db_recover = &db_jmpbuf; 570 (void) setjmp(&db_jmpbuf); 571 572 /* 573 * Execute default ddb start commands only if this is the 574 * first entry into DDB, in case the start commands fault 575 * and we recurse into here. 576 */ 577 if (!savejmp) 578 db_execute_commandlist(db_cmd_on_enter); 579 580 (void) setjmp(&db_jmpbuf); 581 while (!db_cmd_loop_done) { 582 if (db_print_position() != 0) 583 db_printf("\n"); 584 db_output_line = 0; 585 cnpollc(1); 586 (void) db_read_line(); 587 cnpollc(0); 588 db_command(&db_last_command); 589 } 590 591 db_recover = savejmp; 592 } 593 594 /* 595 * Search command table for command prefix 596 */ 597 static int 598 db_cmd_search_table(const char *name, 599 const struct db_command *table, 600 const struct db_command **cmdp) 601 { 602 603 const struct db_command *cmd; 604 int result; 605 606 result = CMD_NONE; 607 *cmdp = NULL; 608 609 for (cmd = table; cmd->name != 0; cmd++) { 610 const char *lp; 611 const char *rp; 612 613 lp = name; 614 rp = cmd->name; 615 while (*lp != '\0' && *lp == *rp) { 616 rp++; 617 lp++; 618 } 619 620 if (*lp != '\0') /* mismatch or extra chars in name */ 621 continue; 622 623 if (*rp == '\0') { /* exact match */ 624 *cmdp = cmd; 625 return (CMD_EXACT); 626 } 627 628 /* prefix match: end of name, not end of command */ 629 if (result == CMD_NONE) { 630 result = CMD_PREFIX; 631 *cmdp = cmd; 632 } 633 else if (result == CMD_PREFIX) { 634 result = CMD_AMBIGUOUS; 635 *cmdp = NULL; 636 } 637 } 638 639 return (result); 640 } 641 642 643 /* 644 * Search list of command tables for command 645 */ 646 static int 647 db_cmd_search(const char *name, 648 struct db_cmd_tbl_en_head *list_head, 649 const struct db_command **cmdp) 650 { 651 struct db_cmd_tbl_en *list_ent; 652 const struct db_command *found_command; 653 bool accept_prefix_match; 654 int result; 655 656 result = CMD_NONE; 657 found_command = NULL; 658 accept_prefix_match = true; 659 660 TAILQ_FOREACH(list_ent, list_head, db_cmd_next) { 661 const struct db_command *cmd; 662 int found; 663 664 found = db_cmd_search_table(name, list_ent->db_cmd, &cmd); 665 if (found == CMD_EXACT) { 666 result = CMD_EXACT; 667 found_command = cmd; 668 break; 669 } 670 671 if (found == CMD_PREFIX) { 672 if (accept_prefix_match) { 673 /* 674 * Continue search, but note current result 675 * in case we won't find anything else. 676 */ 677 accept_prefix_match = false; 678 result = CMD_PREFIX; 679 found_command = cmd; 680 } else { 681 /* 682 * Watch out for globally ambiguous 683 * prefix match that is not locally 684 * ambiguous - with one match in one 685 * table and another match(es) in 686 * another table. 687 */ 688 result = CMD_AMBIGUOUS; 689 found_command = NULL; 690 } 691 } 692 else if (found == CMD_AMBIGUOUS) { 693 accept_prefix_match = false; 694 result = CMD_AMBIGUOUS; 695 found_command = NULL; 696 } 697 } 698 699 *cmdp = found_command; 700 return result; 701 } 702 703 static void 704 db_cmd_search_failed(char *name, int search_result) 705 { 706 if (search_result == CMD_NONE) 707 db_printf("No such command: %s\n", name); 708 else 709 db_printf("Ambiguous command: %s\n", name); 710 } 711 712 713 /* 714 * List commands to the console. 715 */ 716 static void 717 db_cmd_list(const struct db_cmd_tbl_en_head *list) 718 { 719 720 struct db_cmd_tbl_en *list_ent; 721 const struct db_command *table; 722 size_t i, j, w, columns, lines, numcmds, width=0; 723 const char *p; 724 725 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 726 table = list_ent->db_cmd; 727 for (i = 0; table[i].name != NULL; i++) { 728 w = strlen(table[i].name); 729 if (w > width) 730 width = w; 731 } 732 } 733 734 width = DB_NEXT_TAB(width); 735 736 columns = db_max_width / width; 737 if (columns == 0) 738 columns = 1; 739 740 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 741 table = list_ent->db_cmd; 742 743 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) 744 ; 745 lines = (numcmds + columns - 1) / columns; 746 747 for (i = 0; i < lines; i++) { 748 for (j = 0; j < columns; j++) { 749 p = table[j * lines + i].name; 750 if (p) 751 db_printf("%s", p); 752 if (j * lines + i + lines >= numcmds) { 753 db_putchar('\n'); 754 break; 755 } 756 if (p) { 757 w = strlen(p); 758 while (w < width) { 759 w = DB_NEXT_TAB(w); 760 db_putchar('\t'); 761 } 762 } 763 } 764 } 765 } 766 return; 767 } 768 769 /* 770 * Read complete command with all subcommands, starting with current 771 * db_tok_string. If subcommand is missing, print the list of all 772 * subcommands. If command/subcommand is not found, print an error 773 * message. Returns pointer to "leaf" command or NULL. 774 */ 775 static const struct db_command * 776 db_read_command(void) 777 { 778 const struct db_command *command; 779 struct db_cmd_tbl_en_head *list; 780 int found; 781 int t; 782 783 list = &db_base_cmd_list; 784 do { 785 found = db_cmd_search(db_tok_string, list, &command); 786 if (command == NULL) { 787 db_cmd_search_failed(db_tok_string, found); 788 db_flush_lex(); 789 return NULL; 790 } 791 792 if (command->flag == CS_SHOW) 793 list = &db_show_cmd_list; 794 else if (command->flag == CS_MACH) 795 list = &db_mach_cmd_list; 796 else if (command->flag == CS_COMPAT) 797 /* same list */; 798 else 799 break; /* expect no more subcommands */ 800 801 t = db_read_token(); /* read subcommand */ 802 if (t != tIDENT) { 803 /* if none given - just print all of them */ 804 db_cmd_list(list); 805 db_flush_lex(); 806 return NULL; 807 } 808 } while (list != NULL); 809 810 return command; 811 } 812 813 /* 814 * Parse command line and execute apropriate function. 815 */ 816 static void 817 db_command(const struct db_command **last_cmdp) 818 { 819 const struct db_command *command; 820 static db_expr_t last_count = 0; 821 db_expr_t addr, count; 822 char modif[TOK_STRING_SIZE]; 823 824 int t; 825 bool have_addr = false; 826 827 command = NULL; 828 829 t = db_read_token(); 830 if ((t == tEOL) || (t == tCOMMA)) { 831 /* 832 * An empty line repeats last command, at 'next'. 833 * Only a count repeats the last command with the new count. 834 */ 835 command = *last_cmdp; 836 837 if (!command) 838 return; 839 840 addr = (db_expr_t)db_next; 841 if (t == tCOMMA) { 842 if (!db_expression(&count)) { 843 db_printf("Count missing\n"); 844 db_flush_lex(); 845 return; 846 } 847 } else 848 count = last_count; 849 have_addr = false; 850 modif[0] = '\0'; 851 db_skip_to_eol(); 852 853 } else if (t == tEXCL) { 854 db_fncall(0, 0, 0, NULL); 855 return; 856 857 } else if (t != tIDENT) { 858 db_printf("?\n"); 859 db_flush_lex(); 860 return; 861 862 } else { 863 864 command = db_read_command(); 865 if (command == NULL) 866 return; 867 868 if ((command->flag & CS_OWN) == 0) { 869 870 /* 871 * Standard syntax: 872 * command [/modifier] [addr] [,count] 873 */ 874 t = db_read_token(); /* get modifier */ 875 if (t == tSLASH) { 876 t = db_read_token(); 877 if (t != tIDENT) { 878 db_printf("Bad modifier\n"); 879 db_flush_lex(); 880 return; 881 } 882 /* save modifier */ 883 strlcpy(modif, db_tok_string, sizeof(modif)); 884 885 } else { 886 db_unread_token(t); 887 modif[0] = '\0'; 888 } 889 890 if (db_expression(&addr)) { /*get address*/ 891 db_dot = (db_addr_t) addr; 892 db_last_addr = db_dot; 893 have_addr = true; 894 } else { 895 addr = (db_expr_t) db_dot; 896 have_addr = false; 897 } 898 899 t = db_read_token(); 900 if (t == tCOMMA) { /*Get count*/ 901 if (!db_expression(&count)) { 902 db_printf("Count missing\n"); 903 db_flush_lex(); 904 return; 905 } 906 } else { 907 db_unread_token(t); 908 count = -1; 909 } 910 if ((command->flag & CS_MORE) == 0) { 911 db_skip_to_eol(); 912 } 913 } 914 } 915 916 if (command != NULL && command->flag & CS_NOREPEAT) { 917 *last_cmdp = NULL; 918 last_count = 0; 919 } else { 920 *last_cmdp = command; 921 last_count = count; 922 } 923 924 925 if (command != NULL) { 926 /* 927 * Execute the command. 928 */ 929 if (command->fcn != NULL) 930 (*command->fcn)(addr, have_addr, count, modif); 931 932 if (command->flag & CS_SET_DOT) { 933 /* 934 * If command changes dot, set dot to 935 * previous address displayed (if 'ed' style). 936 */ 937 if (db_ed_style) 938 db_dot = db_prev; 939 else 940 db_dot = db_next; 941 } else { 942 /* 943 * If command does not change dot, 944 * set 'next' location to be the same. 945 */ 946 db_next = db_dot; 947 } 948 } 949 } 950 951 /* 952 * Print help for commands 953 */ 954 static void 955 db_help_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 956 const char *modif) 957 { 958 const struct db_command *command; 959 int t; 960 961 t = db_read_token(); 962 963 /* is there another command after the "help"? */ 964 if (t != tIDENT) { 965 /* print base commands */ 966 db_cmd_list(&db_base_cmd_list); 967 return; 968 } 969 970 command = db_read_command(); 971 if (command == NULL) 972 return; 973 974 #ifdef DDB_VERBOSE_HELP 975 db_printf("Command: %s\n", command->name); 976 if (command->cmd_descr != NULL) 977 db_printf(" Description: %s\n", command->cmd_descr); 978 if (command->cmd_arg != NULL) 979 db_printf(" Arguments: %s\n", command->cmd_arg); 980 if (command->cmd_arg_help != NULL) 981 db_printf(" Arguments description:\n%s\n", 982 command->cmd_arg_help); 983 if ((command->cmd_arg == NULL) && (command->cmd_descr == NULL)) 984 db_printf(" No help message.\n"); 985 #endif 986 987 db_skip_to_eol(); 988 } 989 990 /*ARGSUSED*/ 991 static void 992 db_map_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 993 const char *modif) 994 { 995 #ifdef _KERNEL 996 bool full = false; 997 998 if (modif[0] == 'f') 999 full = true; 1000 1001 if (have_addr == false) 1002 addr = (db_expr_t)(uintptr_t)db_read_ptr("kernel_map"); 1003 1004 uvm_map_printit((struct vm_map *)(uintptr_t) addr, full, db_printf); 1005 #endif /* XXX CRASH(8) */ 1006 } 1007 1008 /*ARGSUSED*/ 1009 static void 1010 db_object_print_cmd(db_expr_t addr, bool have_addr, 1011 db_expr_t count, const char *modif) 1012 { 1013 #ifdef _KERNEL /* XXX CRASH(8) */ 1014 bool full = false; 1015 1016 if (modif[0] == 'f') 1017 full = true; 1018 1019 uvm_object_printit((struct uvm_object *)(uintptr_t) addr, full, 1020 db_printf); 1021 #endif 1022 } 1023 1024 /*ARGSUSED*/ 1025 static void 1026 db_page_print_cmd(db_expr_t addr, bool have_addr, 1027 db_expr_t count, const char *modif) 1028 { 1029 #ifdef _KERNEL /* XXX CRASH(8) */ 1030 bool full = false; 1031 1032 if (modif[0] == 'f') 1033 full = true; 1034 1035 uvm_page_printit((struct vm_page *)(uintptr_t) addr, full, db_printf); 1036 #endif 1037 } 1038 1039 /*ARGSUSED*/ 1040 static void 1041 db_show_all_pages(db_expr_t addr, bool have_addr, 1042 db_expr_t count, const char *modif) 1043 { 1044 1045 #ifdef _KERNEL /* XXX CRASH(8) */ 1046 uvm_page_printall(db_printf); 1047 #endif 1048 } 1049 1050 /*ARGSUSED*/ 1051 static void 1052 db_buf_print_cmd(db_expr_t addr, bool have_addr, 1053 db_expr_t count, const char *modif) 1054 { 1055 #ifdef _KERNEL /* XXX CRASH(8) */ 1056 bool full = false; 1057 1058 if (modif[0] == 'f') 1059 full = true; 1060 1061 vfs_buf_print((struct buf *)(uintptr_t) addr, full, db_printf); 1062 #endif 1063 } 1064 1065 /*ARGSUSED*/ 1066 static void 1067 db_event_print_cmd(db_expr_t addr, bool have_addr, 1068 db_expr_t count, const char *modif) 1069 { 1070 bool showzero = false; 1071 bool showall = true; 1072 bool showintr = false; 1073 bool showtrap = false; 1074 bool showmisc = false; 1075 struct evcnt ev, *evp; 1076 char buf[80]; 1077 int i; 1078 1079 i = 0; 1080 while (modif[i]) { 1081 switch (modif[i]) { 1082 case 'f': 1083 showzero = true; 1084 break; 1085 case 'i': 1086 showintr = true; 1087 showall = false; 1088 break; 1089 case 't': 1090 showtrap = true; 1091 showall = false; 1092 break; 1093 case 'm': 1094 showmisc = true; 1095 showall = false; 1096 break; 1097 } 1098 i++; 1099 } 1100 1101 if (showall) 1102 showmisc = showintr = showtrap = true; 1103 1104 evp = (struct evcnt *)db_read_ptr("allevents"); 1105 while (evp != NULL) { 1106 db_read_bytes((db_addr_t)evp, sizeof(ev), (char *)&ev); 1107 evp = ev.ev_list.tqe_next; 1108 if (ev.ev_count == 0 && !showzero) 1109 continue; 1110 if (ev.ev_type == EVCNT_TYPE_INTR && !showintr) 1111 continue; 1112 if (ev.ev_type == EVCNT_TYPE_TRAP && !showtrap) 1113 continue; 1114 if (ev.ev_type == EVCNT_TYPE_MISC && !showmisc) 1115 continue; 1116 db_read_bytes((db_addr_t)ev.ev_group, ev.ev_grouplen + 1, buf); 1117 db_printf("evcnt type %d: %s ", ev.ev_type, buf); 1118 db_read_bytes((db_addr_t)ev.ev_name, ev.ev_namelen + 1, buf); 1119 db_printf("%s = %lld\n", buf, (long long)ev.ev_count); 1120 } 1121 } 1122 1123 /*ARGSUSED*/ 1124 static void 1125 db_vnode_print_cmd(db_expr_t addr, bool have_addr, 1126 db_expr_t count, const char *modif) 1127 { 1128 #ifdef _KERNEL /* XXX CRASH(8) */ 1129 bool full = false; 1130 1131 if (modif[0] == 'f') 1132 full = true; 1133 1134 vfs_vnode_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1135 #endif 1136 } 1137 1138 /*ARGSUSED*/ 1139 static void 1140 db_vnode_lock_print_cmd(db_expr_t addr, bool have_addr, 1141 db_expr_t count, const char *modif) 1142 { 1143 #ifdef _KERNEL /* XXX CRASH(8) */ 1144 bool full = false; 1145 1146 if (modif[0] == 'f') 1147 full = true; 1148 1149 vfs_vnode_lock_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1150 #endif 1151 } 1152 1153 /*ARGSUSED*/ 1154 static void 1155 db_vmem_print_cmd(db_expr_t addr, bool have_addr, 1156 db_expr_t count, const char *modif) 1157 { 1158 1159 #ifdef _KERNEL /* XXX CRASH(8) */ 1160 vmem_print((uintptr_t) addr, modif, db_printf); 1161 #endif 1162 } 1163 1164 static void 1165 db_mount_print_cmd(db_expr_t addr, bool have_addr, 1166 db_expr_t count, const char *modif) 1167 { 1168 #ifdef _KERNEL /* XXX CRASH(8) */ 1169 bool full = false; 1170 1171 if (modif[0] == 'f') 1172 full = true; 1173 1174 vfs_mount_print((struct mount *)(uintptr_t) addr, full, db_printf); 1175 #endif 1176 } 1177 1178 /*ARGSUSED*/ 1179 static void 1180 db_mbuf_print_cmd(db_expr_t addr, bool have_addr, 1181 db_expr_t count, const char *modif) 1182 { 1183 1184 #ifdef _KERNEL /* XXX CRASH(8) */ 1185 m_print((const struct mbuf *)(uintptr_t) addr, modif, db_printf); 1186 #endif 1187 } 1188 1189 /*ARGSUSED*/ 1190 static void 1191 db_pool_print_cmd(db_expr_t addr, bool have_addr, 1192 db_expr_t count, const char *modif) 1193 { 1194 1195 #ifdef _KERNEL /* XXX CRASH(8) */ 1196 pool_printit((struct pool *)(uintptr_t) addr, modif, db_printf); 1197 #endif 1198 } 1199 1200 /*ARGSUSED*/ 1201 static void 1202 db_namecache_print_cmd(db_expr_t addr, bool have_addr, 1203 db_expr_t count, const char *modif) 1204 { 1205 1206 #ifdef _KERNEL /* XXX CRASH(8) */ 1207 namecache_print((struct vnode *)(uintptr_t) addr, db_printf); 1208 #endif 1209 } 1210 1211 /*ARGSUSED*/ 1212 static void 1213 db_uvmexp_print_cmd(db_expr_t addr, bool have_addr, 1214 db_expr_t count, const char *modif) 1215 { 1216 1217 #ifdef _KERNEL /* XXX CRASH(8) */ 1218 uvmexp_print(db_printf); 1219 #endif 1220 } 1221 1222 /*ARGSUSED */ 1223 static void 1224 db_socket_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 1225 const char *modif) 1226 { 1227 1228 #ifdef _KERNEL /* XXX CRASH(8) */ 1229 socket_print(modif, db_printf); 1230 #endif 1231 } 1232 1233 #ifdef KERNHIST 1234 /*ARGSUSED*/ 1235 static void 1236 db_kernhist_print_cmd(db_expr_t addr, bool have_addr, 1237 db_expr_t count, const char *modif) 1238 { 1239 1240 kernhist_print((void *)(uintptr_t)addr, count, modif, db_printf); 1241 } 1242 #endif 1243 1244 /*ARGSUSED*/ 1245 static void 1246 db_lock_print_cmd(db_expr_t addr, bool have_addr, 1247 db_expr_t count, const char *modif) 1248 { 1249 1250 #ifdef _KERNEL /* XXX CRASH(8) */ 1251 lockdebug_lock_print(have_addr ? (void *)(uintptr_t)addr : NULL, 1252 db_printf); 1253 #endif 1254 } 1255 1256 static void 1257 db_show_all_locks(db_expr_t addr, bool have_addr, 1258 db_expr_t count, const char *modif) 1259 { 1260 1261 #ifdef _KERNEL /* XXX CRASH(8) */ 1262 lockdebug_show_all_locks(db_printf, modif); 1263 #endif 1264 } 1265 1266 static void 1267 db_show_lockstats(db_expr_t addr, bool have_addr, 1268 db_expr_t count, const char *modif) 1269 { 1270 1271 #ifdef _KERNEL /* XXX CRASH(8) */ 1272 lockdebug_show_lockstats(db_printf); 1273 #endif 1274 } 1275 1276 /* 1277 * Call random function: 1278 * !expr(arg,arg,arg) 1279 */ 1280 /*ARGSUSED*/ 1281 static void 1282 db_fncall(db_expr_t addr, bool have_addr, 1283 db_expr_t count, const char *modif) 1284 { 1285 #ifdef _KERNEL 1286 db_expr_t fn_addr; 1287 #define MAXARGS 11 1288 db_expr_t args[MAXARGS]; 1289 int nargs = 0; 1290 db_expr_t retval; 1291 db_expr_t (*func)(db_expr_t, ...); 1292 int t; 1293 1294 if (!db_expression(&fn_addr)) { 1295 db_printf("Bad function\n"); 1296 db_flush_lex(); 1297 return; 1298 } 1299 func = (db_expr_t (*)(db_expr_t, ...))(uintptr_t) fn_addr; 1300 1301 t = db_read_token(); 1302 if (t == tLPAREN) { 1303 if (db_expression(&args[0])) { 1304 nargs++; 1305 while ((t = db_read_token()) == tCOMMA) { 1306 if (nargs == MAXARGS) { 1307 db_printf("Too many arguments\n"); 1308 db_flush_lex(); 1309 return; 1310 } 1311 if (!db_expression(&args[nargs])) { 1312 db_printf("Argument missing\n"); 1313 db_flush_lex(); 1314 return; 1315 } 1316 nargs++; 1317 } 1318 db_unread_token(t); 1319 } 1320 if (db_read_token() != tRPAREN) { 1321 db_printf("?\n"); 1322 db_flush_lex(); 1323 return; 1324 } 1325 } 1326 db_skip_to_eol(); 1327 1328 while (nargs < MAXARGS) { 1329 args[nargs++] = 0; 1330 } 1331 1332 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 1333 args[5], args[6], args[7], args[8], args[9]); 1334 db_printf("%s\n", db_num_to_str(retval)); 1335 #else /* _KERNEL */ 1336 db_printf("This command can only be used in-kernel.\n"); 1337 #endif /* _KERNEL */ 1338 } 1339 1340 static void 1341 db_reboot_cmd(db_expr_t addr, bool have_addr, 1342 db_expr_t count, const char *modif) 1343 { 1344 #ifdef _KERNEL 1345 db_expr_t bootflags; 1346 1347 /* Flags, default to RB_AUTOBOOT */ 1348 if (!db_expression(&bootflags)) 1349 bootflags = (db_expr_t)RB_AUTOBOOT; 1350 if (db_read_token() != tEOL) { 1351 db_error("?\n"); 1352 /*NOTREACHED*/ 1353 } 1354 /* 1355 * We are leaving DDB, never to return upward. 1356 * Clear db_recover so that we can debug faults in functions 1357 * called from cpu_reboot. 1358 */ 1359 db_recover = 0; 1360 /* Avoid all mutex errors */ 1361 lockdebug_dismiss(); 1362 panicstr = "reboot forced via kernel debugger"; 1363 /* Make it possible to break into the debugger again */ 1364 spl0(); 1365 cpu_reboot((int)bootflags, NULL); 1366 #else /* _KERNEL */ 1367 db_printf("This command can only be used in-kernel.\n"); 1368 #endif /* _KERNEL */ 1369 } 1370 1371 static void 1372 db_sifting_cmd(db_expr_t addr, bool have_addr, 1373 db_expr_t count, const char *modif) 1374 { 1375 int mode, t; 1376 1377 t = db_read_token(); 1378 if (t == tSLASH) { 1379 t = db_read_token(); 1380 if (t != tIDENT) { 1381 bad_modifier: 1382 db_printf("Bad modifier\n"); 1383 db_flush_lex(); 1384 return; 1385 } 1386 if (!strcmp(db_tok_string, "F")) 1387 mode = 'F'; 1388 else 1389 goto bad_modifier; 1390 t = db_read_token(); 1391 } else 1392 mode = 0; 1393 1394 if (t == tIDENT) 1395 db_sifting(db_tok_string, mode); 1396 else { 1397 db_printf("Bad argument (non-string)\n"); 1398 db_flush_lex(); 1399 } 1400 } 1401 1402 static void 1403 db_stack_trace_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) 1404 { 1405 register const char *cp = modif; 1406 register char c; 1407 void (*pr)(const char *, ...); 1408 1409 pr = db_printf; 1410 while ((c = *cp++) != 0) 1411 if (c == 'l') 1412 pr = (void (*)(const char *, ...))printf; 1413 1414 if (count == -1) 1415 count = 65535; 1416 1417 db_stack_trace_print(addr, have_addr, count, modif, pr); 1418 } 1419 1420 static void 1421 db_sync_cmd(db_expr_t addr, bool have_addr, 1422 db_expr_t count, const char *modif) 1423 { 1424 #ifdef _KERNEL 1425 /* 1426 * We are leaving DDB, never to return upward. 1427 * Clear db_recover so that we can debug faults in functions 1428 * called from cpu_reboot. 1429 */ 1430 db_recover = 0; 1431 panicstr = "dump forced via kernel debugger"; 1432 cpu_reboot(RB_DUMP, NULL); 1433 #else /* _KERNEL */ 1434 db_printf("This command can only be used in-kernel.\n"); 1435 #endif /* _KERNEL */ 1436 } 1437 1438 /* 1439 * Describe what an address is 1440 */ 1441 void 1442 db_whatis_cmd(db_expr_t address, bool have_addr, 1443 db_expr_t count, const char *modif) 1444 { 1445 const uintptr_t addr = (uintptr_t)address; 1446 1447 db_lwp_whatis(addr, db_printf); 1448 #ifdef _KERNEL /* XXX CRASH(8) */ 1449 pool_whatis(addr, db_printf); 1450 vmem_whatis(addr, db_printf); 1451 uvm_whatis(addr, db_printf); 1452 module_whatis(addr, db_printf); 1453 #endif 1454 } 1455
Indexes created Sat Sep 20 22:09:52 GMT 2025