db_command.c revision 1.148.8.2
1 /* $NetBSD: db_command.c,v 1.148.8.2 2018/07/31 17:01:20 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 1.148.8.2 2018/07/31 17:01:20 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 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("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 /* This function is called from machine trap code. */ 545 void 546 db_command_loop(void) 547 { 548 label_t db_jmpbuf; 549 label_t *savejmp; 550 551 /* 552 * Initialize 'prev' and 'next' to dot. 553 */ 554 db_prev = db_dot; 555 db_next = db_dot; 556 557 db_cmd_loop_done = false; 558 559 /* Init default command tables add machine, base, 560 show command tables to the list */ 561 db_init_commands(); 562 563 /* save context for return from ddb */ 564 savejmp = db_recover; 565 db_recover = &db_jmpbuf; 566 (void) setjmp(&db_jmpbuf); 567 568 /* 569 * Execute default ddb start commands only if this is the 570 * first entry into DDB, in case the start commands fault 571 * and we recurse into here. 572 */ 573 if (!savejmp) 574 db_execute_commandlist(db_cmd_on_enter); 575 576 (void) setjmp(&db_jmpbuf); 577 while (!db_cmd_loop_done) { 578 if (db_print_position() != 0) 579 db_printf("\n"); 580 db_output_line = 0; 581 (void) db_read_line(); 582 db_command(&db_last_command); 583 } 584 585 db_recover = savejmp; 586 } 587 588 /* 589 * Search command table for command prefix 590 */ 591 static int 592 db_cmd_search_table(const char *name, 593 const struct db_command *table, 594 const struct db_command **cmdp) 595 { 596 597 const struct db_command *cmd; 598 int result; 599 600 result = CMD_NONE; 601 *cmdp = NULL; 602 603 for (cmd = table; cmd->name != 0; cmd++) { 604 const char *lp; 605 const char *rp; 606 607 lp = name; 608 rp = cmd->name; 609 while (*lp != '\0' && *lp == *rp) { 610 rp++; 611 lp++; 612 } 613 614 if (*lp != '\0') /* mismatch or extra chars in name */ 615 continue; 616 617 if (*rp == '\0') { /* exact match */ 618 *cmdp = cmd; 619 return (CMD_EXACT); 620 } 621 622 /* prefix match: end of name, not end of command */ 623 if (result == CMD_NONE) { 624 result = CMD_PREFIX; 625 *cmdp = cmd; 626 } 627 else if (result == CMD_PREFIX) { 628 result = CMD_AMBIGUOUS; 629 *cmdp = NULL; 630 } 631 } 632 633 return (result); 634 } 635 636 637 /* 638 * Search list of command tables for command 639 */ 640 static int 641 db_cmd_search(const char *name, 642 struct db_cmd_tbl_en_head *list_head, 643 const struct db_command **cmdp) 644 { 645 struct db_cmd_tbl_en *list_ent; 646 const struct db_command *found_command; 647 bool accept_prefix_match; 648 int result; 649 650 result = CMD_NONE; 651 found_command = NULL; 652 accept_prefix_match = true; 653 654 TAILQ_FOREACH(list_ent, list_head, db_cmd_next) { 655 const struct db_command *cmd; 656 int found; 657 658 found = db_cmd_search_table(name, list_ent->db_cmd, &cmd); 659 if (found == CMD_EXACT) { 660 result = CMD_EXACT; 661 found_command = cmd; 662 break; 663 } 664 665 if (found == CMD_PREFIX) { 666 if (accept_prefix_match) { 667 /* 668 * Continue search, but note current result 669 * in case we won't find anything else. 670 */ 671 accept_prefix_match = false; 672 result = CMD_PREFIX; 673 found_command = cmd; 674 } else { 675 /* 676 * Watch out for globally ambiguous 677 * prefix match that is not locally 678 * ambiguous - with one match in one 679 * table and another match(es) in 680 * another table. 681 */ 682 result = CMD_AMBIGUOUS; 683 found_command = NULL; 684 } 685 } 686 else if (found == CMD_AMBIGUOUS) { 687 accept_prefix_match = false; 688 result = CMD_AMBIGUOUS; 689 found_command = NULL; 690 } 691 } 692 693 *cmdp = found_command; 694 return result; 695 } 696 697 static void 698 db_cmd_search_failed(char *name, int search_result) 699 { 700 if (search_result == CMD_NONE) 701 db_printf("No such command: %s\n", name); 702 else 703 db_printf("Ambiguous command: %s\n", name); 704 } 705 706 707 /* 708 * List commands to the console. 709 */ 710 static void 711 db_cmd_list(const struct db_cmd_tbl_en_head *list) 712 { 713 714 struct db_cmd_tbl_en *list_ent; 715 const struct db_command *table; 716 size_t i, j, w, columns, lines, numcmds, width=0; 717 const char *p; 718 719 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 720 table = list_ent->db_cmd; 721 for (i = 0; table[i].name != NULL; i++) { 722 w = strlen(table[i].name); 723 if (w > width) 724 width = w; 725 } 726 } 727 728 width = DB_NEXT_TAB(width); 729 730 columns = db_max_width / width; 731 if (columns == 0) 732 columns = 1; 733 734 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 735 table = list_ent->db_cmd; 736 737 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) 738 ; 739 lines = (numcmds + columns - 1) / columns; 740 741 for (i = 0; i < lines; i++) { 742 for (j = 0; j < columns; j++) { 743 p = table[j * lines + i].name; 744 if (p) 745 db_printf("%s", p); 746 if (j * lines + i + lines >= numcmds) { 747 db_putchar('\n'); 748 break; 749 } 750 if (p) { 751 w = strlen(p); 752 while (w < width) { 753 w = DB_NEXT_TAB(w); 754 db_putchar('\t'); 755 } 756 } 757 } 758 } 759 } 760 return; 761 } 762 763 /* 764 * Read complete command with all subcommands, starting with current 765 * db_tok_string. If subcommand is missing, print the list of all 766 * subcommands. If command/subcommand is not found, print an error 767 * message. Returns pointer to "leaf" command or NULL. 768 */ 769 static const struct db_command * 770 db_read_command(void) 771 { 772 const struct db_command *command; 773 struct db_cmd_tbl_en_head *list; 774 int found; 775 int t; 776 777 list = &db_base_cmd_list; 778 do { 779 found = db_cmd_search(db_tok_string, list, &command); 780 if (command == NULL) { 781 db_cmd_search_failed(db_tok_string, found); 782 db_flush_lex(); 783 return NULL; 784 } 785 786 if (command->flag == CS_SHOW) 787 list = &db_show_cmd_list; 788 else if (command->flag == CS_MACH) 789 list = &db_mach_cmd_list; 790 else if (command->flag == CS_COMPAT) 791 /* same list */; 792 else 793 break; /* expect no more subcommands */ 794 795 t = db_read_token(); /* read subcommand */ 796 if (t != tIDENT) { 797 /* if none given - just print all of them */ 798 db_cmd_list(list); 799 db_flush_lex(); 800 return NULL; 801 } 802 } while (list != NULL); 803 804 return command; 805 } 806 807 /* 808 * Parse command line and execute apropriate function. 809 */ 810 static void 811 db_command(const struct db_command **last_cmdp) 812 { 813 const struct db_command *command; 814 static db_expr_t last_count = 0; 815 db_expr_t addr, count; 816 char modif[TOK_STRING_SIZE]; 817 818 int t; 819 bool have_addr = false; 820 821 command = NULL; 822 823 t = db_read_token(); 824 if ((t == tEOL) || (t == tCOMMA)) { 825 /* 826 * An empty line repeats last command, at 'next'. 827 * Only a count repeats the last command with the new count. 828 */ 829 command = *last_cmdp; 830 831 if (!command) 832 return; 833 834 addr = (db_expr_t)db_next; 835 if (t == tCOMMA) { 836 if (!db_expression(&count)) { 837 db_printf("Count missing\n"); 838 db_flush_lex(); 839 return; 840 } 841 } else 842 count = last_count; 843 have_addr = false; 844 modif[0] = '\0'; 845 db_skip_to_eol(); 846 847 } else if (t == tEXCL) { 848 db_fncall(0, 0, 0, NULL); 849 return; 850 851 } else if (t != tIDENT) { 852 db_printf("?\n"); 853 db_flush_lex(); 854 return; 855 856 } else { 857 858 command = db_read_command(); 859 if (command == NULL) 860 return; 861 862 if ((command->flag & CS_OWN) == 0) { 863 864 /* 865 * Standard syntax: 866 * command [/modifier] [addr] [,count] 867 */ 868 t = db_read_token(); /* get modifier */ 869 if (t == tSLASH) { 870 t = db_read_token(); 871 if (t != tIDENT) { 872 db_printf("Bad modifier\n"); 873 db_flush_lex(); 874 return; 875 } 876 /* save modifier */ 877 strlcpy(modif, db_tok_string, sizeof(modif)); 878 879 } else { 880 db_unread_token(t); 881 modif[0] = '\0'; 882 } 883 884 if (db_expression(&addr)) { /*get address*/ 885 db_dot = (db_addr_t) addr; 886 db_last_addr = db_dot; 887 have_addr = true; 888 } else { 889 addr = (db_expr_t) db_dot; 890 have_addr = false; 891 } 892 893 t = db_read_token(); 894 if (t == tCOMMA) { /*Get count*/ 895 if (!db_expression(&count)) { 896 db_printf("Count missing\n"); 897 db_flush_lex(); 898 return; 899 } 900 } else { 901 db_unread_token(t); 902 count = -1; 903 } 904 if ((command->flag & CS_MORE) == 0) { 905 db_skip_to_eol(); 906 } 907 } 908 } 909 910 if (command != NULL && command->flag & CS_NOREPEAT) { 911 *last_cmdp = NULL; 912 last_count = 0; 913 } else { 914 *last_cmdp = command; 915 last_count = count; 916 } 917 918 919 if (command != NULL) { 920 /* 921 * Execute the command. 922 */ 923 if (command->fcn != NULL) 924 (*command->fcn)(addr, have_addr, count, modif); 925 926 if (command->flag & CS_SET_DOT) { 927 /* 928 * If command changes dot, set dot to 929 * previous address displayed (if 'ed' style). 930 */ 931 if (db_ed_style) 932 db_dot = db_prev; 933 else 934 db_dot = db_next; 935 } else { 936 /* 937 * If command does not change dot, 938 * set 'next' location to be the same. 939 */ 940 db_next = db_dot; 941 } 942 } 943 } 944 945 /* 946 * Print help for commands 947 */ 948 static void 949 db_help_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 950 const char *modif) 951 { 952 const struct db_command *command; 953 int t; 954 955 t = db_read_token(); 956 957 /* is there another command after the "help"? */ 958 if (t != tIDENT) { 959 /* print base commands */ 960 db_cmd_list(&db_base_cmd_list); 961 return; 962 } 963 964 command = db_read_command(); 965 if (command == NULL) 966 return; 967 968 #ifdef DDB_VERBOSE_HELP 969 db_printf("Command: %s\n", command->name); 970 if (command->cmd_descr != NULL) 971 db_printf(" Description: %s\n", command->cmd_descr); 972 if (command->cmd_arg != NULL) 973 db_printf(" Arguments: %s\n", command->cmd_arg); 974 if (command->cmd_arg_help != NULL) 975 db_printf(" Arguments description:\n%s\n", 976 command->cmd_arg_help); 977 if ((command->cmd_arg == NULL) && (command->cmd_descr == NULL)) 978 db_printf(" No help message.\n"); 979 #endif 980 981 db_skip_to_eol(); 982 } 983 984 /*ARGSUSED*/ 985 static void 986 db_map_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 987 const char *modif) 988 { 989 #ifdef _KERNEL 990 bool full = false; 991 992 if (modif[0] == 'f') 993 full = true; 994 995 if (have_addr == false) 996 addr = (db_expr_t)(uintptr_t)db_read_ptr("kernel_map"); 997 998 uvm_map_printit((struct vm_map *)(uintptr_t) addr, full, db_printf); 999 #endif /* XXX CRASH(8) */ 1000 } 1001 1002 /*ARGSUSED*/ 1003 static void 1004 db_object_print_cmd(db_expr_t addr, bool have_addr, 1005 db_expr_t count, const char *modif) 1006 { 1007 #ifdef _KERNEL /* XXX CRASH(8) */ 1008 bool full = false; 1009 1010 if (modif[0] == 'f') 1011 full = true; 1012 1013 uvm_object_printit((struct uvm_object *)(uintptr_t) addr, full, 1014 db_printf); 1015 #endif 1016 } 1017 1018 /*ARGSUSED*/ 1019 static void 1020 db_page_print_cmd(db_expr_t addr, bool have_addr, 1021 db_expr_t count, const char *modif) 1022 { 1023 #ifdef _KERNEL /* XXX CRASH(8) */ 1024 bool full = false; 1025 1026 if (modif[0] == 'f') 1027 full = true; 1028 1029 uvm_page_printit((struct vm_page *)(uintptr_t) addr, full, db_printf); 1030 #endif 1031 } 1032 1033 /*ARGSUSED*/ 1034 static void 1035 db_show_all_pages(db_expr_t addr, bool have_addr, 1036 db_expr_t count, const char *modif) 1037 { 1038 1039 #ifdef _KERNEL /* XXX CRASH(8) */ 1040 uvm_page_printall(db_printf); 1041 #endif 1042 } 1043 1044 /*ARGSUSED*/ 1045 static void 1046 db_buf_print_cmd(db_expr_t addr, bool have_addr, 1047 db_expr_t count, const char *modif) 1048 { 1049 #ifdef _KERNEL /* XXX CRASH(8) */ 1050 bool full = false; 1051 1052 if (modif[0] == 'f') 1053 full = true; 1054 1055 vfs_buf_print((struct buf *)(uintptr_t) addr, full, db_printf); 1056 #endif 1057 } 1058 1059 /*ARGSUSED*/ 1060 static void 1061 db_event_print_cmd(db_expr_t addr, bool have_addr, 1062 db_expr_t count, const char *modif) 1063 { 1064 bool showzero = false; 1065 bool showall = true; 1066 bool showintr = false; 1067 bool showtrap = false; 1068 bool showmisc = false; 1069 struct evcnt ev, *evp; 1070 char buf[80]; 1071 int i; 1072 1073 i = 0; 1074 while (modif[i]) { 1075 switch (modif[i]) { 1076 case 'f': 1077 showzero = true; 1078 break; 1079 case 'i': 1080 showintr = true; 1081 showall = false; 1082 break; 1083 case 't': 1084 showtrap = true; 1085 showall = false; 1086 break; 1087 case 'm': 1088 showmisc = true; 1089 showall = false; 1090 break; 1091 } 1092 i++; 1093 } 1094 1095 if (showall) 1096 showmisc = showintr = showtrap = true; 1097 1098 evp = (struct evcnt *)db_read_ptr("allevents"); 1099 while (evp != NULL) { 1100 db_read_bytes((db_addr_t)evp, sizeof(ev), (char *)&ev); 1101 evp = ev.ev_list.tqe_next; 1102 if (ev.ev_count == 0 && !showzero) 1103 continue; 1104 if (ev.ev_type == EVCNT_TYPE_INTR && !showintr) 1105 continue; 1106 if (ev.ev_type == EVCNT_TYPE_TRAP && !showtrap) 1107 continue; 1108 if (ev.ev_type == EVCNT_TYPE_MISC && !showmisc) 1109 continue; 1110 db_read_bytes((db_addr_t)ev.ev_group, ev.ev_grouplen + 1, buf); 1111 db_printf("evcnt type %d: %s ", ev.ev_type, buf); 1112 db_read_bytes((db_addr_t)ev.ev_name, ev.ev_namelen + 1, buf); 1113 db_printf("%s = %lld\n", buf, (long long)ev.ev_count); 1114 } 1115 } 1116 1117 /*ARGSUSED*/ 1118 static void 1119 db_vnode_print_cmd(db_expr_t addr, bool have_addr, 1120 db_expr_t count, const char *modif) 1121 { 1122 #ifdef _KERNEL /* XXX CRASH(8) */ 1123 bool full = false; 1124 1125 if (modif[0] == 'f') 1126 full = true; 1127 1128 vfs_vnode_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1129 #endif 1130 } 1131 1132 /*ARGSUSED*/ 1133 static void 1134 db_vnode_lock_print_cmd(db_expr_t addr, bool have_addr, 1135 db_expr_t count, const char *modif) 1136 { 1137 #ifdef _KERNEL /* XXX CRASH(8) */ 1138 bool full = false; 1139 1140 if (modif[0] == 'f') 1141 full = true; 1142 1143 vfs_vnode_lock_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1144 #endif 1145 } 1146 1147 /*ARGSUSED*/ 1148 static void 1149 db_vmem_print_cmd(db_expr_t addr, bool have_addr, 1150 db_expr_t count, const char *modif) 1151 { 1152 1153 #ifdef _KERNEL /* XXX CRASH(8) */ 1154 vmem_print((uintptr_t) addr, modif, db_printf); 1155 #endif 1156 } 1157 1158 static void 1159 db_mount_print_cmd(db_expr_t addr, bool have_addr, 1160 db_expr_t count, const char *modif) 1161 { 1162 #ifdef _KERNEL /* XXX CRASH(8) */ 1163 bool full = false; 1164 1165 if (modif[0] == 'f') 1166 full = true; 1167 1168 vfs_mount_print((struct mount *)(uintptr_t) addr, full, db_printf); 1169 #endif 1170 } 1171 1172 /*ARGSUSED*/ 1173 static void 1174 db_mbuf_print_cmd(db_expr_t addr, bool have_addr, 1175 db_expr_t count, const char *modif) 1176 { 1177 1178 #ifdef _KERNEL /* XXX CRASH(8) */ 1179 m_print((const struct mbuf *)(uintptr_t) addr, modif, db_printf); 1180 #endif 1181 } 1182 1183 /*ARGSUSED*/ 1184 static void 1185 db_pool_print_cmd(db_expr_t addr, bool have_addr, 1186 db_expr_t count, const char *modif) 1187 { 1188 1189 #ifdef _KERNEL /* XXX CRASH(8) */ 1190 pool_printit((struct pool *)(uintptr_t) addr, modif, db_printf); 1191 #endif 1192 } 1193 1194 /*ARGSUSED*/ 1195 static void 1196 db_namecache_print_cmd(db_expr_t addr, bool have_addr, 1197 db_expr_t count, const char *modif) 1198 { 1199 1200 #ifdef _KERNEL /* XXX CRASH(8) */ 1201 namecache_print((struct vnode *)(uintptr_t) addr, db_printf); 1202 #endif 1203 } 1204 1205 /*ARGSUSED*/ 1206 static void 1207 db_uvmexp_print_cmd(db_expr_t addr, bool have_addr, 1208 db_expr_t count, const char *modif) 1209 { 1210 1211 #ifdef _KERNEL /* XXX CRASH(8) */ 1212 uvmexp_print(db_printf); 1213 #endif 1214 } 1215 1216 /*ARGSUSED */ 1217 static void 1218 db_socket_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 1219 const char *modif) 1220 { 1221 1222 #ifdef _KERNEL /* XXX CRASH(8) */ 1223 socket_print(modif, db_printf); 1224 #endif 1225 } 1226 1227 #ifdef KERNHIST 1228 /*ARGSUSED*/ 1229 static void 1230 db_kernhist_print_cmd(db_expr_t addr, bool have_addr, 1231 db_expr_t count, const char *modif) 1232 { 1233 1234 kernhist_print((void *)(uintptr_t)addr, db_printf); 1235 } 1236 #endif 1237 1238 /*ARGSUSED*/ 1239 static void 1240 db_lock_print_cmd(db_expr_t addr, bool have_addr, 1241 db_expr_t count, const char *modif) 1242 { 1243 1244 #ifdef _KERNEL /* XXX CRASH(8) */ 1245 lockdebug_lock_print(have_addr ? (void *)(uintptr_t)addr : NULL, 1246 db_printf); 1247 #endif 1248 } 1249 1250 static void 1251 db_show_all_locks(db_expr_t addr, bool have_addr, 1252 db_expr_t count, const char *modif) 1253 { 1254 1255 #ifdef _KERNEL /* XXX CRASH(8) */ 1256 lockdebug_show_all_locks(db_printf, modif); 1257 #endif 1258 } 1259 1260 static void 1261 db_show_lockstats(db_expr_t addr, bool have_addr, 1262 db_expr_t count, const char *modif) 1263 { 1264 1265 #ifdef _KERNEL /* XXX CRASH(8) */ 1266 lockdebug_show_lockstats(db_printf); 1267 #endif 1268 } 1269 1270 /* 1271 * Call random function: 1272 * !expr(arg,arg,arg) 1273 */ 1274 /*ARGSUSED*/ 1275 static void 1276 db_fncall(db_expr_t addr, bool have_addr, 1277 db_expr_t count, const char *modif) 1278 { 1279 #ifdef _KERNEL 1280 db_expr_t fn_addr; 1281 #define MAXARGS 11 1282 db_expr_t args[MAXARGS]; 1283 int nargs = 0; 1284 db_expr_t retval; 1285 db_expr_t (*func)(db_expr_t, ...); 1286 int t; 1287 1288 if (!db_expression(&fn_addr)) { 1289 db_printf("Bad function\n"); 1290 db_flush_lex(); 1291 return; 1292 } 1293 func = (db_expr_t (*)(db_expr_t, ...))(uintptr_t) fn_addr; 1294 1295 t = db_read_token(); 1296 if (t == tLPAREN) { 1297 if (db_expression(&args[0])) { 1298 nargs++; 1299 while ((t = db_read_token()) == tCOMMA) { 1300 if (nargs == MAXARGS) { 1301 db_printf("Too many arguments\n"); 1302 db_flush_lex(); 1303 return; 1304 } 1305 if (!db_expression(&args[nargs])) { 1306 db_printf("Argument missing\n"); 1307 db_flush_lex(); 1308 return; 1309 } 1310 nargs++; 1311 } 1312 db_unread_token(t); 1313 } 1314 if (db_read_token() != tRPAREN) { 1315 db_printf("?\n"); 1316 db_flush_lex(); 1317 return; 1318 } 1319 } 1320 db_skip_to_eol(); 1321 1322 while (nargs < MAXARGS) { 1323 args[nargs++] = 0; 1324 } 1325 1326 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 1327 args[5], args[6], args[7], args[8], args[9]); 1328 db_printf("%s\n", db_num_to_str(retval)); 1329 #else /* _KERNEL */ 1330 db_printf("This command can only be used in-kernel.\n"); 1331 #endif /* _KERNEL */ 1332 } 1333 1334 static void 1335 db_reboot_cmd(db_expr_t addr, bool have_addr, 1336 db_expr_t count, const char *modif) 1337 { 1338 #ifdef _KERNEL 1339 db_expr_t bootflags; 1340 1341 /* Flags, default to RB_AUTOBOOT */ 1342 if (!db_expression(&bootflags)) 1343 bootflags = (db_expr_t)RB_AUTOBOOT; 1344 if (db_read_token() != tEOL) { 1345 db_error("?\n"); 1346 /*NOTREACHED*/ 1347 } 1348 /* 1349 * We are leaving DDB, never to return upward. 1350 * Clear db_recover so that we can debug faults in functions 1351 * called from cpu_reboot. 1352 */ 1353 db_recover = 0; 1354 panicstr = "reboot forced via kernel debugger"; 1355 cpu_reboot((int)bootflags, NULL); 1356 #else /* _KERNEL */ 1357 db_printf("This command can only be used in-kernel.\n"); 1358 #endif /* _KERNEL */ 1359 } 1360 1361 static void 1362 db_sifting_cmd(db_expr_t addr, bool have_addr, 1363 db_expr_t count, const char *modif) 1364 { 1365 int mode, t; 1366 1367 t = db_read_token(); 1368 if (t == tSLASH) { 1369 t = db_read_token(); 1370 if (t != tIDENT) { 1371 bad_modifier: 1372 db_printf("Bad modifier\n"); 1373 db_flush_lex(); 1374 return; 1375 } 1376 if (!strcmp(db_tok_string, "F")) 1377 mode = 'F'; 1378 else 1379 goto bad_modifier; 1380 t = db_read_token(); 1381 } else 1382 mode = 0; 1383 1384 if (t == tIDENT) 1385 db_sifting(db_tok_string, mode); 1386 else { 1387 db_printf("Bad argument (non-string)\n"); 1388 db_flush_lex(); 1389 } 1390 } 1391 1392 static void 1393 db_stack_trace_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) 1394 { 1395 register const char *cp = modif; 1396 register char c; 1397 void (*pr)(const char *, ...); 1398 1399 pr = db_printf; 1400 while ((c = *cp++) != 0) 1401 if (c == 'l') 1402 pr = (void (*)(const char *, ...))printf; 1403 1404 if (count == -1) 1405 count = 65535; 1406 1407 db_stack_trace_print(addr, have_addr, count, modif, pr); 1408 } 1409 1410 static void 1411 db_sync_cmd(db_expr_t addr, bool have_addr, 1412 db_expr_t count, const char *modif) 1413 { 1414 #ifdef _KERNEL 1415 /* 1416 * We are leaving DDB, never to return upward. 1417 * Clear db_recover so that we can debug faults in functions 1418 * called from cpu_reboot. 1419 */ 1420 db_recover = 0; 1421 panicstr = "dump forced via kernel debugger"; 1422 cpu_reboot(RB_DUMP, NULL); 1423 #else /* _KERNEL */ 1424 db_printf("This command can only be used in-kernel.\n"); 1425 #endif /* _KERNEL */ 1426 } 1427 1428 /* 1429 * Describe what an address is 1430 */ 1431 void 1432 db_whatis_cmd(db_expr_t address, bool have_addr, 1433 db_expr_t count, const char *modif) 1434 { 1435 const uintptr_t addr = (uintptr_t)address; 1436 1437 db_lwp_whatis(addr, db_printf); 1438 #ifdef _KERNEL /* XXX CRASH(8) */ 1439 pool_whatis(addr, db_printf); 1440 vmem_whatis(addr, db_printf); 1441 uvm_whatis(addr, db_printf); 1442 module_whatis(addr, db_printf); 1443 #endif 1444 } 1445
Indexes created Tue Sep 30 11:09:46 GMT 2025