db_command.c revision 1.148.8.5
1 /* $NetBSD: db_command.c,v 1.148.8.5 2018/09/27 14:52:26 martin 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 1.148.8.5 2018/09/27 14:52:26 martin 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("event", db_event_print_cmd, 0, 251 "Print all the non-zero evcnt(9) event counters.", "[/fitm]",NULL) }, 252 { DDB_ADD_CMD("files", db_show_files_cmd, 0, 253 "Print the files open by process at address", 254 "[/f] address", NULL) }, 255 { DDB_ADD_CMD("lock", db_lock_print_cmd, 0,NULL,NULL,NULL) }, 256 { DDB_ADD_CMD("lockstats", 257 db_show_lockstats, 0, 258 "Print statistics of locks", NULL, NULL) }, 259 { DDB_ADD_CMD("map", db_map_print_cmd, 0, 260 "Print the vm_map at address.", "[/f] address",NULL) }, 261 { DDB_ADD_CMD("socket", db_socket_print_cmd, 0,NULL,NULL,NULL) }, 262 { DDB_ADD_CMD("module", db_show_module_cmd, 0, 263 "Print kernel modules", NULL, NULL) }, 264 { DDB_ADD_CMD("mount", db_mount_print_cmd, 0, 265 "Print the mount structure at address.", "[/f] address",NULL) }, 266 #ifdef MQUEUE 267 { DDB_ADD_CMD("mqueue", db_show_mqueue_cmd, 0, 268 "Print the message queues", NULL, NULL) }, 269 #endif 270 { DDB_ADD_CMD("mbuf", db_mbuf_print_cmd, 0,NULL,NULL, 271 "-c prints all mbuf chains") }, 272 { DDB_ADD_CMD("ncache", db_namecache_print_cmd, 0, 273 "Dump the namecache list.", "address",NULL) }, 274 { DDB_ADD_CMD("object", db_object_print_cmd, 0, 275 "Print the vm_object at address.", "[/f] address",NULL) }, 276 { DDB_ADD_CMD("page", db_page_print_cmd, 0, 277 "Print the vm_page at address.", "[/f] address",NULL) }, 278 { DDB_ADD_CMD("panic", db_show_panic, 0, 279 "Print the current panic string",NULL,NULL) }, 280 { DDB_ADD_CMD("pool", db_pool_print_cmd, 0, 281 "Print the pool at address.", "[/clp] address",NULL) }, 282 { DDB_ADD_CMD("registers", db_show_regs, 0, 283 "Display the register set.", "[/u]",NULL) }, 284 { DDB_ADD_CMD("sched_qs", db_show_sched_qs, 0, 285 "Print the state of the scheduler's run queues.", 286 NULL,NULL) }, 287 { DDB_ADD_CMD("uvmexp", db_uvmexp_print_cmd, 0, 288 "Print a selection of UVM counters and statistics.", 289 NULL,NULL) }, 290 #ifdef KERNHIST 291 { DDB_ADD_CMD("kernhist", db_kernhist_print_cmd, 0, 292 "Print the UVM history logs.", 293 NULL,NULL) }, 294 #endif 295 { DDB_ADD_CMD("vnode", db_vnode_print_cmd, 0, 296 "Print the vnode at address.", "[/f] address",NULL) }, 297 { DDB_ADD_CMD("vnode_lock", db_vnode_lock_print_cmd, 0, 298 "Print the vnode having that address as v_lock.", 299 "[/f] address",NULL) }, 300 { DDB_ADD_CMD("vmem", db_vmem_print_cmd, 0, 301 "Print the vmem usage.", "[/a] address", NULL) }, 302 { DDB_ADD_CMD("vmems", db_show_all_vmems, 0, 303 "Show all vmems.", NULL, NULL) }, 304 #ifdef _KERNEL 305 { DDB_ADD_CMD("watches", db_listwatch_cmd, 0, 306 "Display all watchpoints.", NULL,NULL) }, 307 #endif 308 { DDB_ADD_CMD(NULL, NULL, 0,NULL,NULL,NULL) } 309 }; 310 311 static const struct db_command db_command_table[] = { 312 { DDB_ADD_CMD("b", db_breakpoint_cmd, 0, 313 "Set a breakpoint at address", "[/u] address[,count].",NULL) }, 314 { DDB_ADD_CMD("break", db_breakpoint_cmd, 0, 315 "Set a breakpoint at address", "[/u] address[,count].",NULL) }, 316 { DDB_ADD_CMD("bt", db_stack_trace_cmd, 0, 317 "Show backtrace.", "See help trace.",NULL) }, 318 { DDB_ADD_CMD("c", db_continue_cmd, 0, 319 "Continue execution.", "[/c]",NULL) }, 320 { DDB_ADD_CMD("call", db_fncall, CS_OWN, 321 "Call the function", "address[(expression[,...])]",NULL) }, 322 { DDB_ADD_CMD("callout", db_show_callout, 0, NULL, 323 NULL,NULL ) }, 324 { DDB_ADD_CMD("continue", db_continue_cmd, 0, 325 "Continue execution.", "[/c]",NULL) }, 326 { DDB_ADD_CMD("d", db_delete_cmd, 0, 327 "Delete a breakpoint.", "address | #number",NULL) }, 328 { DDB_ADD_CMD("delete", db_delete_cmd, 0, 329 "Delete a breakpoint.", "address | #number",NULL) }, 330 { DDB_ADD_CMD("dmesg", db_dmesg, 0, 331 "Show kernel message buffer.", "[count]",NULL) }, 332 { DDB_ADD_CMD("dwatch", db_deletewatch_cmd, 0, 333 "Delete the watchpoint.", "address",NULL) }, 334 { DDB_ADD_CMD("examine", db_examine_cmd, CS_SET_DOT, 335 "Display the address locations.", 336 "[/modifier] address[,count]",NULL) }, 337 { DDB_ADD_CMD("exit", db_continue_cmd, 0, 338 "Continue execution.", "[/c]",NULL) }, 339 { DDB_ADD_CMD("help", db_help_print_cmd, CS_OWN|CS_NOREPEAT, 340 "Display help about commands", 341 "Use other commands as arguments.",NULL) }, 342 { DDB_ADD_CMD("kill", db_kill_proc, CS_OWN, 343 "Send a signal to the process","pid[,signal_number]", 344 " pid:\t\t\tthe process id (may need 0t prefix for decimal)\n" 345 " signal_number:\tthe signal to send") }, 346 #ifdef KGDB 347 { DDB_ADD_CMD("kgdb", db_kgdb_cmd, 0, NULL,NULL,NULL) }, 348 #endif 349 { DDB_ADD_CMD("machine",NULL,CS_MACH, 350 "Architecture specific functions.",NULL,NULL) }, 351 { DDB_ADD_CMD("match", db_trace_until_matching_cmd,0, 352 "Stop at the matching return instruction.","See help next",NULL) }, 353 { DDB_ADD_CMD("next", db_trace_until_matching_cmd,0, 354 "Stop at the matching return instruction.","[/p]",NULL) }, 355 { DDB_ADD_CMD("p", db_print_cmd, 0, 356 "Print address according to the format.", 357 "[/axzodurc] address [address ...]",NULL) }, 358 { DDB_ADD_CMD("print", db_print_cmd, 0, 359 "Print address according to the format.", 360 "[/axzodurc] address [address ...]",NULL) }, 361 { DDB_ADD_CMD("ps", db_show_all_procs, 0, 362 "Print all processes.","See show all procs",NULL) }, 363 { DDB_ADD_CMD("quit", db_continue_cmd, 0, 364 "Continue execution.", "[/c]",NULL) }, 365 { DDB_ADD_CMD("reboot", db_reboot_cmd, CS_OWN, 366 "Reboot","0x1 RB_ASKNAME, 0x2 RB_SINGLE, 0x4 RB_NOSYNC, 0x8 RB_HALT," 367 "0x40 RB_KDB, 0x100 RB_DUMP, 0x808 RB_POWERDOWN",NULL) }, 368 { DDB_ADD_CMD("s", db_single_step_cmd, 0, 369 "Single-step count times.","[/p] [,count]",NULL) }, 370 { DDB_ADD_CMD("search", db_search_cmd, CS_OWN|CS_SET_DOT, 371 "Search memory from address for value.", 372 "[/bhl] address value [mask] [,count]",NULL) }, 373 { DDB_ADD_CMD("set", db_set_cmd, CS_OWN, 374 "Set the named variable","$variable [=] expression",NULL) }, 375 { DDB_ADD_CMD("show", NULL, CS_SHOW, 376 "Show kernel stats.", NULL,NULL) }, 377 { DDB_ADD_CMD("sifting", db_sifting_cmd, CS_OWN, 378 "Search the symbol tables ","[/F] string",NULL) }, 379 { DDB_ADD_CMD("step", db_single_step_cmd, 0, 380 "Single-step count times.","[/p] [,count]",NULL) }, 381 { DDB_ADD_CMD("sync", db_sync_cmd, CS_OWN, 382 "Force a crash dump, and then reboot.",NULL,NULL) }, 383 { DDB_ADD_CMD("trace", db_stack_trace_cmd, 0, 384 "Stack trace from frame-address.", 385 "[/u[l]] [frame-address][,count]",NULL) }, 386 { DDB_ADD_CMD("until", db_trace_until_call_cmd,0, 387 "Stop at the next call or return instruction.","[/p]",NULL) }, 388 { DDB_ADD_CMD("w", db_write_cmd, CS_MORE|CS_SET_DOT, 389 "Write the expressions at succeeding locations.", 390 "[/bhl] address expression [expression ...]",NULL) }, 391 { DDB_ADD_CMD("watch", db_watchpoint_cmd, CS_MORE, 392 "Set a watchpoint for a region. ","address[,size]",NULL) }, 393 { DDB_ADD_CMD("whatis", db_whatis_cmd, 0, 394 "Describe what an address is", "address", NULL) }, 395 { DDB_ADD_CMD("write", db_write_cmd, CS_MORE|CS_SET_DOT, 396 "Write the expressions at succeeding locations.", 397 "[/bhl] address expression [expression ...]",NULL) }, 398 { DDB_ADD_CMD("x", db_examine_cmd, CS_SET_DOT, 399 "Display the address locations.", 400 "[/modifier] address[,count]",NULL) }, 401 { DDB_ADD_CMD(NULL, NULL, 0, NULL, NULL, NULL) } 402 }; 403 404 static const struct db_command *db_last_command = NULL; 405 #if defined(DDB_COMMANDONENTER) 406 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 407 #else /* defined(DDB_COMMANDONENTER) */ 408 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 409 #endif /* defined(DDB_COMMANDONENTER) */ 410 #define DB_LINE_SEP ';' 411 412 /* 413 * Execute commandlist after ddb start 414 * This function goes through the command list created from commands and ';' 415 */ 416 static void 417 db_execute_commandlist(const char *cmdlist) 418 { 419 const char *cmd = cmdlist; 420 const struct db_command *dummy = NULL; 421 422 while (*cmd != '\0') { 423 const char *ep = cmd; 424 425 while (*ep != '\0' && *ep != DB_LINE_SEP) { 426 ep++; 427 } 428 db_set_line(cmd, ep); 429 db_command(&dummy); 430 cmd = ep; 431 if (*cmd == DB_LINE_SEP) { 432 cmd++; 433 } 434 } 435 } 436 437 /* Initialize ddb command tables */ 438 void 439 db_init_commands(void) 440 { 441 static bool done = false; 442 443 if (done) return; 444 done = true; 445 446 /* register command tables */ 447 (void)db_register_tbl_entry(DDB_BASE_CMD, &db_base_cmd_builtins); 448 #ifdef DB_MACHINE_COMMANDS 449 (void)db_register_tbl_entry(DDB_MACH_CMD, &db_mach_cmd_builtins); 450 #endif 451 (void)db_register_tbl_entry(DDB_SHOW_CMD, &db_show_cmd_builtins); 452 } 453 454 455 /* 456 * Add command table to the specified list 457 * Arg: 458 * int type specifies type of command table DDB_SHOW_CMD|DDB_BASE_CMD|DDB_MAC_CMD 459 * *cmd_tbl poiter to static allocated db_command table 460 * 461 * Command table must be NULL terminated array of struct db_command 462 */ 463 int 464 db_register_tbl(uint8_t type, const struct db_command *cmd_tbl) 465 { 466 struct db_cmd_tbl_en *list_ent; 467 468 /* empty list - ignore */ 469 if (cmd_tbl->name == 0) 470 return 0; 471 472 /* force builtin commands to be registered first */ 473 db_init_commands(); 474 475 /* now create a list entry for this table */ 476 list_ent = db_zalloc(sizeof(*list_ent)); 477 if (list_ent == NULL) 478 return ENOMEM; 479 list_ent->db_cmd=cmd_tbl; 480 481 /* and register it */ 482 return db_register_tbl_entry(type, list_ent); 483 } 484 485 static int 486 db_register_tbl_entry(uint8_t type, struct db_cmd_tbl_en *list_ent) 487 { 488 struct db_cmd_tbl_en_head *list; 489 490 switch(type) { 491 case DDB_BASE_CMD: 492 list = &db_base_cmd_list; 493 break; 494 case DDB_SHOW_CMD: 495 list = &db_show_cmd_list; 496 break; 497 case DDB_MACH_CMD: 498 list = &db_mach_cmd_list; 499 break; 500 default: 501 return ENOENT; 502 } 503 504 TAILQ_INSERT_TAIL(list, list_ent, db_cmd_next); 505 506 return 0; 507 } 508 509 /* 510 * Remove command table specified with db_cmd address == cmd_tbl 511 */ 512 int 513 db_unregister_tbl(uint8_t type,const struct db_command *cmd_tbl) 514 { 515 struct db_cmd_tbl_en *list_ent; 516 struct db_cmd_tbl_en_head *list; 517 518 /* find list on which the entry should live */ 519 switch (type) { 520 case DDB_BASE_CMD: 521 list=&db_base_cmd_list; 522 break; 523 case DDB_SHOW_CMD: 524 list=&db_show_cmd_list; 525 break; 526 case DDB_MACH_CMD: 527 list=&db_mach_cmd_list; 528 break; 529 default: 530 return EINVAL; 531 } 532 533 TAILQ_FOREACH (list_ent, list, db_cmd_next) { 534 if (list_ent->db_cmd == cmd_tbl){ 535 TAILQ_REMOVE(list, 536 list_ent, db_cmd_next); 537 db_free(list_ent, sizeof(*list_ent)); 538 return 0; 539 } 540 } 541 return ENOENT; 542 } 543 544 #ifndef _KERNEL 545 #define cnpollc(c) __nothing 546 #endif 547 548 /* 549 * This function is called via db_trap() or directly from 550 * machine trap code. 551 */ 552 void 553 db_command_loop(void) 554 { 555 label_t db_jmpbuf; 556 label_t *savejmp; 557 558 /* 559 * Initialize 'prev' and 'next' to dot. 560 */ 561 db_prev = db_dot; 562 db_next = db_dot; 563 564 db_cmd_loop_done = false; 565 566 /* Init default command tables add machine, base, 567 show command tables to the list */ 568 db_init_commands(); 569 570 /* save context for return from ddb */ 571 savejmp = db_recover; 572 db_recover = &db_jmpbuf; 573 (void) setjmp(&db_jmpbuf); 574 575 /* 576 * Execute default ddb start commands only if this is the 577 * first entry into DDB, in case the start commands fault 578 * and we recurse into here. 579 */ 580 if (!savejmp) 581 db_execute_commandlist(db_cmd_on_enter); 582 583 (void) setjmp(&db_jmpbuf); 584 while (!db_cmd_loop_done) { 585 if (db_print_position() != 0) 586 db_printf("\n"); 587 db_output_line = 0; 588 cnpollc(1); 589 (void) db_read_line(); 590 cnpollc(0); 591 db_command(&db_last_command); 592 } 593 594 db_recover = savejmp; 595 } 596 597 /* 598 * Search command table for command prefix 599 */ 600 static int 601 db_cmd_search_table(const char *name, 602 const struct db_command *table, 603 const struct db_command **cmdp) 604 { 605 606 const struct db_command *cmd; 607 int result; 608 609 result = CMD_NONE; 610 *cmdp = NULL; 611 612 for (cmd = table; cmd->name != 0; cmd++) { 613 const char *lp; 614 const char *rp; 615 616 lp = name; 617 rp = cmd->name; 618 while (*lp != '\0' && *lp == *rp) { 619 rp++; 620 lp++; 621 } 622 623 if (*lp != '\0') /* mismatch or extra chars in name */ 624 continue; 625 626 if (*rp == '\0') { /* exact match */ 627 *cmdp = cmd; 628 return (CMD_EXACT); 629 } 630 631 /* prefix match: end of name, not end of command */ 632 if (result == CMD_NONE) { 633 result = CMD_PREFIX; 634 *cmdp = cmd; 635 } 636 else if (result == CMD_PREFIX) { 637 result = CMD_AMBIGUOUS; 638 *cmdp = NULL; 639 } 640 } 641 642 return (result); 643 } 644 645 646 /* 647 * Search list of command tables for command 648 */ 649 static int 650 db_cmd_search(const char *name, 651 struct db_cmd_tbl_en_head *list_head, 652 const struct db_command **cmdp) 653 { 654 struct db_cmd_tbl_en *list_ent; 655 const struct db_command *found_command; 656 bool accept_prefix_match; 657 int result; 658 659 result = CMD_NONE; 660 found_command = NULL; 661 accept_prefix_match = true; 662 663 TAILQ_FOREACH(list_ent, list_head, db_cmd_next) { 664 const struct db_command *cmd; 665 int found; 666 667 found = db_cmd_search_table(name, list_ent->db_cmd, &cmd); 668 if (found == CMD_EXACT) { 669 result = CMD_EXACT; 670 found_command = cmd; 671 break; 672 } 673 674 if (found == CMD_PREFIX) { 675 if (accept_prefix_match) { 676 /* 677 * Continue search, but note current result 678 * in case we won't find anything else. 679 */ 680 accept_prefix_match = false; 681 result = CMD_PREFIX; 682 found_command = cmd; 683 } else { 684 /* 685 * Watch out for globally ambiguous 686 * prefix match that is not locally 687 * ambiguous - with one match in one 688 * table and another match(es) in 689 * another table. 690 */ 691 result = CMD_AMBIGUOUS; 692 found_command = NULL; 693 } 694 } 695 else if (found == CMD_AMBIGUOUS) { 696 accept_prefix_match = false; 697 result = CMD_AMBIGUOUS; 698 found_command = NULL; 699 } 700 } 701 702 *cmdp = found_command; 703 return result; 704 } 705 706 static void 707 db_cmd_search_failed(char *name, int search_result) 708 { 709 if (search_result == CMD_NONE) 710 db_printf("No such command: %s\n", name); 711 else 712 db_printf("Ambiguous command: %s\n", name); 713 } 714 715 716 /* 717 * List commands to the console. 718 */ 719 static void 720 db_cmd_list(const struct db_cmd_tbl_en_head *list) 721 { 722 723 struct db_cmd_tbl_en *list_ent; 724 const struct db_command *table; 725 size_t i, j, w, columns, lines, numcmds, width=0; 726 const char *p; 727 728 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 729 table = list_ent->db_cmd; 730 for (i = 0; table[i].name != NULL; i++) { 731 w = strlen(table[i].name); 732 if (w > width) 733 width = w; 734 } 735 } 736 737 width = DB_NEXT_TAB(width); 738 739 columns = db_max_width / width; 740 if (columns == 0) 741 columns = 1; 742 743 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 744 table = list_ent->db_cmd; 745 746 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) 747 ; 748 lines = (numcmds + columns - 1) / columns; 749 750 for (i = 0; i < lines; i++) { 751 for (j = 0; j < columns; j++) { 752 p = table[j * lines + i].name; 753 if (p) 754 db_printf("%s", p); 755 if (j * lines + i + lines >= numcmds) { 756 db_putchar('\n'); 757 break; 758 } 759 if (p) { 760 w = strlen(p); 761 while (w < width) { 762 w = DB_NEXT_TAB(w); 763 db_putchar('\t'); 764 } 765 } 766 } 767 } 768 } 769 return; 770 } 771 772 /* 773 * Read complete command with all subcommands, starting with current 774 * db_tok_string. If subcommand is missing, print the list of all 775 * subcommands. If command/subcommand is not found, print an error 776 * message. Returns pointer to "leaf" command or NULL. 777 */ 778 static const struct db_command * 779 db_read_command(void) 780 { 781 const struct db_command *command; 782 struct db_cmd_tbl_en_head *list; 783 int found; 784 int t; 785 786 list = &db_base_cmd_list; 787 do { 788 found = db_cmd_search(db_tok_string, list, &command); 789 if (command == NULL) { 790 db_cmd_search_failed(db_tok_string, found); 791 db_flush_lex(); 792 return NULL; 793 } 794 795 if (command->flag == CS_SHOW) 796 list = &db_show_cmd_list; 797 else if (command->flag == CS_MACH) 798 list = &db_mach_cmd_list; 799 else if (command->flag == CS_COMPAT) 800 /* same list */; 801 else 802 break; /* expect no more subcommands */ 803 804 t = db_read_token(); /* read subcommand */ 805 if (t != tIDENT) { 806 /* if none given - just print all of them */ 807 db_cmd_list(list); 808 db_flush_lex(); 809 return NULL; 810 } 811 } while (list != NULL); 812 813 return command; 814 } 815 816 /* 817 * Parse command line and execute apropriate function. 818 */ 819 static void 820 db_command(const struct db_command **last_cmdp) 821 { 822 const struct db_command *command; 823 static db_expr_t last_count = 0; 824 db_expr_t addr, count; 825 char modif[TOK_STRING_SIZE]; 826 827 int t; 828 bool have_addr = false; 829 830 command = NULL; 831 832 t = db_read_token(); 833 if ((t == tEOL) || (t == tCOMMA)) { 834 /* 835 * An empty line repeats last command, at 'next'. 836 * Only a count repeats the last command with the new count. 837 */ 838 command = *last_cmdp; 839 840 if (!command) 841 return; 842 843 addr = (db_expr_t)db_next; 844 if (t == tCOMMA) { 845 if (!db_expression(&count)) { 846 db_printf("Count missing\n"); 847 db_flush_lex(); 848 return; 849 } 850 } else 851 count = last_count; 852 have_addr = false; 853 modif[0] = '\0'; 854 db_skip_to_eol(); 855 856 } else if (t == tEXCL) { 857 db_fncall(0, 0, 0, NULL); 858 return; 859 860 } else if (t != tIDENT) { 861 db_printf("?\n"); 862 db_flush_lex(); 863 return; 864 865 } else { 866 867 command = db_read_command(); 868 if (command == NULL) 869 return; 870 871 if ((command->flag & CS_OWN) == 0) { 872 873 /* 874 * Standard syntax: 875 * command [/modifier] [addr] [,count] 876 */ 877 t = db_read_token(); /* get modifier */ 878 if (t == tSLASH) { 879 t = db_read_token(); 880 if (t != tIDENT) { 881 db_printf("Bad modifier\n"); 882 db_flush_lex(); 883 return; 884 } 885 /* save modifier */ 886 strlcpy(modif, db_tok_string, sizeof(modif)); 887 888 } else { 889 db_unread_token(t); 890 modif[0] = '\0'; 891 } 892 893 if (db_expression(&addr)) { /*get address*/ 894 db_dot = (db_addr_t) addr; 895 db_last_addr = db_dot; 896 have_addr = true; 897 } else { 898 addr = (db_expr_t) db_dot; 899 have_addr = false; 900 } 901 902 t = db_read_token(); 903 if (t == tCOMMA) { /*Get count*/ 904 if (!db_expression(&count)) { 905 db_printf("Count missing\n"); 906 db_flush_lex(); 907 return; 908 } 909 } else { 910 db_unread_token(t); 911 count = -1; 912 } 913 if ((command->flag & CS_MORE) == 0) { 914 db_skip_to_eol(); 915 } 916 } 917 } 918 919 if (command != NULL && command->flag & CS_NOREPEAT) { 920 *last_cmdp = NULL; 921 last_count = 0; 922 } else { 923 *last_cmdp = command; 924 last_count = count; 925 } 926 927 928 if (command != NULL) { 929 /* 930 * Execute the command. 931 */ 932 if (command->fcn != NULL) 933 (*command->fcn)(addr, have_addr, count, modif); 934 935 if (command->flag & CS_SET_DOT) { 936 /* 937 * If command changes dot, set dot to 938 * previous address displayed (if 'ed' style). 939 */ 940 if (db_ed_style) 941 db_dot = db_prev; 942 else 943 db_dot = db_next; 944 } else { 945 /* 946 * If command does not change dot, 947 * set 'next' location to be the same. 948 */ 949 db_next = db_dot; 950 } 951 } 952 } 953 954 /* 955 * Print help for commands 956 */ 957 static void 958 db_help_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 959 const char *modif) 960 { 961 const struct db_command *command; 962 int t; 963 964 t = db_read_token(); 965 966 /* is there another command after the "help"? */ 967 if (t != tIDENT) { 968 /* print base commands */ 969 db_cmd_list(&db_base_cmd_list); 970 return; 971 } 972 973 command = db_read_command(); 974 if (command == NULL) 975 return; 976 977 #ifdef DDB_VERBOSE_HELP 978 db_printf("Command: %s\n", command->name); 979 if (command->cmd_descr != NULL) 980 db_printf(" Description: %s\n", command->cmd_descr); 981 if (command->cmd_arg != NULL) 982 db_printf(" Arguments: %s\n", command->cmd_arg); 983 if (command->cmd_arg_help != NULL) 984 db_printf(" Arguments description:\n%s\n", 985 command->cmd_arg_help); 986 if ((command->cmd_arg == NULL) && (command->cmd_descr == NULL)) 987 db_printf(" No help message.\n"); 988 #endif 989 990 db_skip_to_eol(); 991 } 992 993 /*ARGSUSED*/ 994 static void 995 db_map_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 996 const char *modif) 997 { 998 #ifdef _KERNEL 999 bool full = false; 1000 1001 if (modif[0] == 'f') 1002 full = true; 1003 1004 if (have_addr == false) 1005 addr = (db_expr_t)(uintptr_t)db_read_ptr("kernel_map"); 1006 1007 uvm_map_printit((struct vm_map *)(uintptr_t) addr, full, db_printf); 1008 #endif /* XXX CRASH(8) */ 1009 } 1010 1011 /*ARGSUSED*/ 1012 static void 1013 db_object_print_cmd(db_expr_t addr, bool have_addr, 1014 db_expr_t count, const char *modif) 1015 { 1016 #ifdef _KERNEL /* XXX CRASH(8) */ 1017 bool full = false; 1018 1019 if (modif[0] == 'f') 1020 full = true; 1021 1022 uvm_object_printit((struct uvm_object *)(uintptr_t) addr, full, 1023 db_printf); 1024 #endif 1025 } 1026 1027 /*ARGSUSED*/ 1028 static void 1029 db_page_print_cmd(db_expr_t addr, bool have_addr, 1030 db_expr_t count, const char *modif) 1031 { 1032 #ifdef _KERNEL /* XXX CRASH(8) */ 1033 bool full = false; 1034 1035 if (modif[0] == 'f') 1036 full = true; 1037 1038 uvm_page_printit((struct vm_page *)(uintptr_t) addr, full, db_printf); 1039 #endif 1040 } 1041 1042 /*ARGSUSED*/ 1043 static void 1044 db_show_all_pages(db_expr_t addr, bool have_addr, 1045 db_expr_t count, const char *modif) 1046 { 1047 1048 #ifdef _KERNEL /* XXX CRASH(8) */ 1049 uvm_page_printall(db_printf); 1050 #endif 1051 } 1052 1053 /*ARGSUSED*/ 1054 static void 1055 db_buf_print_cmd(db_expr_t addr, bool have_addr, 1056 db_expr_t count, const char *modif) 1057 { 1058 #ifdef _KERNEL /* XXX CRASH(8) */ 1059 bool full = false; 1060 1061 if (modif[0] == 'f') 1062 full = true; 1063 1064 vfs_buf_print((struct buf *)(uintptr_t) addr, full, db_printf); 1065 #endif 1066 } 1067 1068 /*ARGSUSED*/ 1069 static void 1070 db_event_print_cmd(db_expr_t addr, bool have_addr, 1071 db_expr_t count, const char *modif) 1072 { 1073 bool showzero = false; 1074 bool showall = true; 1075 bool showintr = false; 1076 bool showtrap = false; 1077 bool showmisc = false; 1078 struct evcnt ev, *evp; 1079 char buf[80]; 1080 int i; 1081 1082 i = 0; 1083 while (modif[i]) { 1084 switch (modif[i]) { 1085 case 'f': 1086 showzero = true; 1087 break; 1088 case 'i': 1089 showintr = true; 1090 showall = false; 1091 break; 1092 case 't': 1093 showtrap = true; 1094 showall = false; 1095 break; 1096 case 'm': 1097 showmisc = true; 1098 showall = false; 1099 break; 1100 } 1101 i++; 1102 } 1103 1104 if (showall) 1105 showmisc = showintr = showtrap = true; 1106 1107 evp = (struct evcnt *)db_read_ptr("allevents"); 1108 while (evp != NULL) { 1109 db_read_bytes((db_addr_t)evp, sizeof(ev), (char *)&ev); 1110 evp = ev.ev_list.tqe_next; 1111 if (ev.ev_count == 0 && !showzero) 1112 continue; 1113 if (ev.ev_type == EVCNT_TYPE_INTR && !showintr) 1114 continue; 1115 if (ev.ev_type == EVCNT_TYPE_TRAP && !showtrap) 1116 continue; 1117 if (ev.ev_type == EVCNT_TYPE_MISC && !showmisc) 1118 continue; 1119 db_read_bytes((db_addr_t)ev.ev_group, ev.ev_grouplen + 1, buf); 1120 db_printf("evcnt type %d: %s ", ev.ev_type, buf); 1121 db_read_bytes((db_addr_t)ev.ev_name, ev.ev_namelen + 1, buf); 1122 db_printf("%s = %lld\n", buf, (long long)ev.ev_count); 1123 } 1124 } 1125 1126 /*ARGSUSED*/ 1127 static void 1128 db_vnode_print_cmd(db_expr_t addr, bool have_addr, 1129 db_expr_t count, const char *modif) 1130 { 1131 #ifdef _KERNEL /* XXX CRASH(8) */ 1132 bool full = false; 1133 1134 if (modif[0] == 'f') 1135 full = true; 1136 1137 vfs_vnode_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1138 #endif 1139 } 1140 1141 /*ARGSUSED*/ 1142 static void 1143 db_vnode_lock_print_cmd(db_expr_t addr, bool have_addr, 1144 db_expr_t count, const char *modif) 1145 { 1146 #ifdef _KERNEL /* XXX CRASH(8) */ 1147 bool full = false; 1148 1149 if (modif[0] == 'f') 1150 full = true; 1151 1152 vfs_vnode_lock_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1153 #endif 1154 } 1155 1156 /*ARGSUSED*/ 1157 static void 1158 db_vmem_print_cmd(db_expr_t addr, bool have_addr, 1159 db_expr_t count, const char *modif) 1160 { 1161 1162 #ifdef _KERNEL /* XXX CRASH(8) */ 1163 vmem_print((uintptr_t) addr, modif, db_printf); 1164 #endif 1165 } 1166 1167 static void 1168 db_mount_print_cmd(db_expr_t addr, bool have_addr, 1169 db_expr_t count, const char *modif) 1170 { 1171 #ifdef _KERNEL /* XXX CRASH(8) */ 1172 bool full = false; 1173 1174 if (modif[0] == 'f') 1175 full = true; 1176 1177 vfs_mount_print((struct mount *)(uintptr_t) addr, full, db_printf); 1178 #endif 1179 } 1180 1181 /*ARGSUSED*/ 1182 static void 1183 db_mbuf_print_cmd(db_expr_t addr, bool have_addr, 1184 db_expr_t count, const char *modif) 1185 { 1186 1187 #ifdef _KERNEL /* XXX CRASH(8) */ 1188 m_print((const struct mbuf *)(uintptr_t) addr, modif, db_printf); 1189 #endif 1190 } 1191 1192 /*ARGSUSED*/ 1193 static void 1194 db_pool_print_cmd(db_expr_t addr, bool have_addr, 1195 db_expr_t count, const char *modif) 1196 { 1197 1198 #ifdef _KERNEL /* XXX CRASH(8) */ 1199 pool_printit((struct pool *)(uintptr_t) addr, modif, db_printf); 1200 #endif 1201 } 1202 1203 /*ARGSUSED*/ 1204 static void 1205 db_namecache_print_cmd(db_expr_t addr, bool have_addr, 1206 db_expr_t count, const char *modif) 1207 { 1208 1209 #ifdef _KERNEL /* XXX CRASH(8) */ 1210 namecache_print((struct vnode *)(uintptr_t) addr, db_printf); 1211 #endif 1212 } 1213 1214 /*ARGSUSED*/ 1215 static void 1216 db_uvmexp_print_cmd(db_expr_t addr, bool have_addr, 1217 db_expr_t count, const char *modif) 1218 { 1219 1220 #ifdef _KERNEL /* XXX CRASH(8) */ 1221 uvmexp_print(db_printf); 1222 #endif 1223 } 1224 1225 /*ARGSUSED */ 1226 static void 1227 db_socket_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 1228 const char *modif) 1229 { 1230 1231 #ifdef _KERNEL /* XXX CRASH(8) */ 1232 socket_print(modif, db_printf); 1233 #endif 1234 } 1235 1236 #ifdef KERNHIST 1237 /*ARGSUSED*/ 1238 static void 1239 db_kernhist_print_cmd(db_expr_t addr, bool have_addr, 1240 db_expr_t count, const char *modif) 1241 { 1242 1243 kernhist_print((void *)(uintptr_t)addr, db_printf); 1244 } 1245 #endif 1246 1247 /*ARGSUSED*/ 1248 static void 1249 db_lock_print_cmd(db_expr_t addr, bool have_addr, 1250 db_expr_t count, const char *modif) 1251 { 1252 1253 #ifdef _KERNEL /* XXX CRASH(8) */ 1254 lockdebug_lock_print(have_addr ? (void *)(uintptr_t)addr : NULL, 1255 db_printf); 1256 #endif 1257 } 1258 1259 static void 1260 db_show_all_locks(db_expr_t addr, bool have_addr, 1261 db_expr_t count, const char *modif) 1262 { 1263 1264 #ifdef _KERNEL /* XXX CRASH(8) */ 1265 lockdebug_show_all_locks(db_printf, modif); 1266 #endif 1267 } 1268 1269 static void 1270 db_show_lockstats(db_expr_t addr, bool have_addr, 1271 db_expr_t count, const char *modif) 1272 { 1273 1274 #ifdef _KERNEL /* XXX CRASH(8) */ 1275 lockdebug_show_lockstats(db_printf); 1276 #endif 1277 } 1278 1279 /* 1280 * Call random function: 1281 * !expr(arg,arg,arg) 1282 */ 1283 /*ARGSUSED*/ 1284 static void 1285 db_fncall(db_expr_t addr, bool have_addr, 1286 db_expr_t count, const char *modif) 1287 { 1288 #ifdef _KERNEL 1289 db_expr_t fn_addr; 1290 #define MAXARGS 11 1291 db_expr_t args[MAXARGS]; 1292 int nargs = 0; 1293 db_expr_t retval; 1294 db_expr_t (*func)(db_expr_t, ...); 1295 int t; 1296 1297 if (!db_expression(&fn_addr)) { 1298 db_printf("Bad function\n"); 1299 db_flush_lex(); 1300 return; 1301 } 1302 func = (db_expr_t (*)(db_expr_t, ...))(uintptr_t) fn_addr; 1303 1304 t = db_read_token(); 1305 if (t == tLPAREN) { 1306 if (db_expression(&args[0])) { 1307 nargs++; 1308 while ((t = db_read_token()) == tCOMMA) { 1309 if (nargs == MAXARGS) { 1310 db_printf("Too many arguments\n"); 1311 db_flush_lex(); 1312 return; 1313 } 1314 if (!db_expression(&args[nargs])) { 1315 db_printf("Argument missing\n"); 1316 db_flush_lex(); 1317 return; 1318 } 1319 nargs++; 1320 } 1321 db_unread_token(t); 1322 } 1323 if (db_read_token() != tRPAREN) { 1324 db_printf("?\n"); 1325 db_flush_lex(); 1326 return; 1327 } 1328 } 1329 db_skip_to_eol(); 1330 1331 while (nargs < MAXARGS) { 1332 args[nargs++] = 0; 1333 } 1334 1335 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 1336 args[5], args[6], args[7], args[8], args[9]); 1337 db_printf("%s\n", db_num_to_str(retval)); 1338 #else /* _KERNEL */ 1339 db_printf("This command can only be used in-kernel.\n"); 1340 #endif /* _KERNEL */ 1341 } 1342 1343 static void 1344 db_reboot_cmd(db_expr_t addr, bool have_addr, 1345 db_expr_t count, const char *modif) 1346 { 1347 #ifdef _KERNEL 1348 db_expr_t bootflags; 1349 1350 /* Flags, default to RB_AUTOBOOT */ 1351 if (!db_expression(&bootflags)) 1352 bootflags = (db_expr_t)RB_AUTOBOOT; 1353 if (db_read_token() != tEOL) { 1354 db_error("?\n"); 1355 /*NOTREACHED*/ 1356 } 1357 /* 1358 * We are leaving DDB, never to return upward. 1359 * Clear db_recover so that we can debug faults in functions 1360 * called from cpu_reboot. 1361 */ 1362 db_recover = 0; 1363 /* Avoid all mutex errors */ 1364 lockdebug_dismiss(); 1365 panicstr = "reboot forced via kernel debugger"; 1366 /* Make it possible to break into the debugger again */ 1367 spl0(); 1368 cpu_reboot((int)bootflags, NULL); 1369 #else /* _KERNEL */ 1370 db_printf("This command can only be used in-kernel.\n"); 1371 #endif /* _KERNEL */ 1372 } 1373 1374 static void 1375 db_sifting_cmd(db_expr_t addr, bool have_addr, 1376 db_expr_t count, const char *modif) 1377 { 1378 int mode, t; 1379 1380 t = db_read_token(); 1381 if (t == tSLASH) { 1382 t = db_read_token(); 1383 if (t != tIDENT) { 1384 bad_modifier: 1385 db_printf("Bad modifier\n"); 1386 db_flush_lex(); 1387 return; 1388 } 1389 if (!strcmp(db_tok_string, "F")) 1390 mode = 'F'; 1391 else 1392 goto bad_modifier; 1393 t = db_read_token(); 1394 } else 1395 mode = 0; 1396 1397 if (t == tIDENT) 1398 db_sifting(db_tok_string, mode); 1399 else { 1400 db_printf("Bad argument (non-string)\n"); 1401 db_flush_lex(); 1402 } 1403 } 1404 1405 static void 1406 db_stack_trace_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) 1407 { 1408 register const char *cp = modif; 1409 register char c; 1410 void (*pr)(const char *, ...); 1411 1412 pr = db_printf; 1413 while ((c = *cp++) != 0) 1414 if (c == 'l') 1415 pr = (void (*)(const char *, ...))printf; 1416 1417 if (count == -1) 1418 count = 65535; 1419 1420 db_stack_trace_print(addr, have_addr, count, modif, pr); 1421 } 1422 1423 static void 1424 db_sync_cmd(db_expr_t addr, bool have_addr, 1425 db_expr_t count, const char *modif) 1426 { 1427 #ifdef _KERNEL 1428 /* 1429 * We are leaving DDB, never to return upward. 1430 * Clear db_recover so that we can debug faults in functions 1431 * called from cpu_reboot. 1432 */ 1433 db_recover = 0; 1434 panicstr = "dump forced via kernel debugger"; 1435 cpu_reboot(RB_DUMP, NULL); 1436 #else /* _KERNEL */ 1437 db_printf("This command can only be used in-kernel.\n"); 1438 #endif /* _KERNEL */ 1439 } 1440 1441 /* 1442 * Describe what an address is 1443 */ 1444 void 1445 db_whatis_cmd(db_expr_t address, bool have_addr, 1446 db_expr_t count, const char *modif) 1447 { 1448 const uintptr_t addr = (uintptr_t)address; 1449 1450 db_lwp_whatis(addr, db_printf); 1451 #ifdef _KERNEL /* XXX CRASH(8) */ 1452 pool_whatis(addr, db_printf); 1453 vmem_whatis(addr, db_printf); 1454 uvm_whatis(addr, db_printf); 1455 module_whatis(addr, db_printf); 1456 #endif 1457 } 1458
Indexes created Tue Sep 30 17:09:57 GMT 2025