db_command.c revision 1.133
1 /* $NetBSD: db_command.c,v 1.133 2009/07/19 02:37:33 rmind 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 1.133 2009/07/19 02:37:33 rmind 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_uvmhist.h" 72 #include "opt_ddbparam.h" 73 #include "opt_multiprocessor.h" 74 #include "arp.h" 75 #endif 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/reboot.h> 80 #include <sys/device.h> 81 #include <sys/lwp.h> 82 #include <sys/malloc.h> 83 #include <sys/mbuf.h> 84 #include <sys/namei.h> 85 #include <sys/pool.h> 86 #include <sys/proc.h> 87 #include <sys/vnode.h> 88 #include <sys/vmem.h> 89 #include <sys/lockdebug.h> 90 #include <sys/cpu.h> 91 #include <sys/buf.h> 92 #include <sys/module.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 /* 103 * Results of command search. 104 */ 105 #define CMD_EXACT 0 106 #define CMD_PREFIX 1 107 #define CMD_NONE 2 108 #define CMD_AMBIGUOUS 3 109 110 /* 111 * Exported global variables 112 */ 113 bool db_cmd_loop_done; 114 label_t *db_recover; 115 db_addr_t db_dot; 116 db_addr_t db_last_addr; 117 db_addr_t db_prev; 118 db_addr_t db_next; 119 120 121 /* 122 * New DDB api for adding and removing commands uses three lists, because 123 * we use two types of commands 124 * a) standard commands without subcommands -> reboot 125 * b) show commands which are subcommands of show command -> show aio_jobs 126 * c) if defined machine specific commands 127 * 128 * ddb_add_cmd, ddb_rem_cmd use type (DDB_SHOW_CMD||DDB_BASE_CMD)argument to 129 * add them to representativ lists. 130 */ 131 132 static const struct db_command db_command_table[]; 133 static const struct db_command db_show_cmds[]; 134 135 #ifdef DB_MACHINE_COMMANDS 136 static const struct db_command db_machine_command_table[]; 137 #endif 138 139 /* the global queue of all command tables */ 140 TAILQ_HEAD(db_cmd_tbl_en_head, db_cmd_tbl_en); 141 142 /* TAILQ entry used to register command tables */ 143 struct db_cmd_tbl_en { 144 const struct db_command *db_cmd; /* cmd table */ 145 TAILQ_ENTRY(db_cmd_tbl_en) db_cmd_next; 146 }; 147 148 /* head of base commands list */ 149 static struct db_cmd_tbl_en_head db_base_cmd_list = 150 TAILQ_HEAD_INITIALIZER(db_base_cmd_list); 151 static struct db_cmd_tbl_en db_base_cmd_builtins = 152 { .db_cmd = db_command_table }; 153 154 /* head of show commands list */ 155 static struct db_cmd_tbl_en_head db_show_cmd_list = 156 TAILQ_HEAD_INITIALIZER(db_show_cmd_list); 157 static struct db_cmd_tbl_en db_show_cmd_builtins = 158 { .db_cmd = db_show_cmds }; 159 160 /* head of machine commands list */ 161 static struct db_cmd_tbl_en_head db_mach_cmd_list = 162 TAILQ_HEAD_INITIALIZER(db_mach_cmd_list); 163 #ifdef DB_MACHINE_COMMANDS 164 static struct db_cmd_tbl_en db_mach_cmd_builtins = 165 { .db_cmd = db_machine_command_table }; 166 #endif 167 168 /* 169 * if 'ed' style: 'dot' is set at start of last item printed, 170 * and '+' points to next line. 171 * Otherwise: 'dot' points to next item, '..' points to last. 172 */ 173 static bool db_ed_style = true; 174 175 static void db_init_commands(void); 176 static int db_register_tbl_entry(uint8_t type, 177 struct db_cmd_tbl_en *list_ent); 178 static void db_cmd_list(const struct db_cmd_tbl_en_head *); 179 static int db_cmd_search(const char *, struct db_cmd_tbl_en_head *, 180 const struct db_command **); 181 static int db_cmd_search_table(const char *, const struct db_command *, 182 const struct db_command **); 183 static void db_cmd_search_failed(char *, int); 184 static const struct db_command *db_read_command(void); 185 static void db_command(const struct db_command **); 186 static void db_buf_print_cmd(db_expr_t, bool, db_expr_t, const char *); 187 static void db_event_print_cmd(db_expr_t, bool, db_expr_t, const char *); 188 static void db_fncall(db_expr_t, bool, db_expr_t, const char *); 189 static void db_help_print_cmd(db_expr_t, bool, db_expr_t, const char *); 190 static void db_lock_print_cmd(db_expr_t, bool, db_expr_t, const char *); 191 static void db_mount_print_cmd(db_expr_t, bool, db_expr_t, const char *); 192 static void db_mbuf_print_cmd(db_expr_t, bool, db_expr_t, const char *); 193 static void db_malloc_print_cmd(db_expr_t, bool, db_expr_t, const char *); 194 static void db_map_print_cmd(db_expr_t, bool, db_expr_t, const char *); 195 static void db_namecache_print_cmd(db_expr_t, bool, db_expr_t, 196 const char *); 197 static void db_object_print_cmd(db_expr_t, bool, db_expr_t, const char *); 198 static void db_page_print_cmd(db_expr_t, bool, db_expr_t, const char *); 199 static void db_show_all_pages(db_expr_t, bool, db_expr_t, const char *); 200 static void db_pool_print_cmd(db_expr_t, bool, db_expr_t, const char *); 201 static void db_reboot_cmd(db_expr_t, bool, db_expr_t, const char *); 202 static void db_sifting_cmd(db_expr_t, bool, db_expr_t, const char *); 203 static void db_stack_trace_cmd(db_expr_t, bool, db_expr_t, const char *); 204 static void db_sync_cmd(db_expr_t, bool, db_expr_t, const char *); 205 static void db_whatis_cmd(db_expr_t, bool, db_expr_t, const char *); 206 static void db_uvmexp_print_cmd(db_expr_t, bool, db_expr_t, const char *); 207 #ifdef UVMHIST 208 static void db_uvmhist_print_cmd(db_expr_t, bool, db_expr_t, const char *); 209 #endif 210 static void db_vnode_print_cmd(db_expr_t, bool, db_expr_t, const char *); 211 static void db_vmem_print_cmd(db_expr_t, bool, db_expr_t, const char *); 212 213 static const struct db_command db_show_cmds[] = { 214 /*added from all sub cmds*/ 215 #ifdef _KERNEL /* XXX CRASH(8) */ 216 { DDB_ADD_CMD("callout", db_show_callout, 217 0 ,"List all used callout functions.",NULL,NULL) }, 218 #endif 219 { DDB_ADD_CMD("pages", db_show_all_pages, 220 0 ,"List all used memory pages.",NULL,NULL) }, 221 { DDB_ADD_CMD("procs", db_show_all_procs, 222 0 ,"List all processes.",NULL,NULL) }, 223 { DDB_ADD_CMD("pools", db_show_all_pools, 224 0 ,"Show all poolS",NULL,NULL) }, 225 #ifdef AIO 226 /*added from all sub cmds*/ 227 { DDB_ADD_CMD("aio_jobs", db_show_aio_jobs, 0, 228 "Show aio jobs",NULL,NULL) }, 229 #endif 230 { DDB_ADD_CMD("all", NULL, 231 CS_COMPAT, NULL,NULL,NULL) }, 232 #if defined(INET) && (NARP > 0) 233 { DDB_ADD_CMD("arptab", db_show_arptab, 0,NULL,NULL,NULL) }, 234 #endif 235 #ifdef _KERNEL 236 { DDB_ADD_CMD("breaks", db_listbreak_cmd, 0, 237 "Display all breaks.",NULL,NULL) }, 238 #endif 239 { DDB_ADD_CMD("buf", db_buf_print_cmd, 0, 240 "Print the struct buf at address.", "[/f] address",NULL) }, 241 { DDB_ADD_CMD("event", db_event_print_cmd, 0, 242 "Print all the non-zero evcnt(9) event counters.", "[/fitm]",NULL) }, 243 { DDB_ADD_CMD("files", db_show_files_cmd, 0, 244 "Print the files open by process at address", 245 "[/f] address", NULL) }, 246 { DDB_ADD_CMD("lock", db_lock_print_cmd, 0,NULL,NULL,NULL) }, 247 { DDB_ADD_CMD("malloc", db_malloc_print_cmd,0,NULL,NULL,NULL) }, 248 { DDB_ADD_CMD("map", db_map_print_cmd, 0, 249 "Print the vm_map at address.", "[/f] address",NULL) }, 250 { DDB_ADD_CMD("module", db_show_module_cmd, 0, 251 "Print kernel modules", NULL, NULL) }, 252 { DDB_ADD_CMD("mount", db_mount_print_cmd, 0, 253 "Print the mount structure at address.", "[/f] address",NULL) }, 254 #ifdef MQUEUE 255 { DDB_ADD_CMD("mqueue", db_show_mqueue_cmd, 0, 256 "Print the message queues", NULL, NULL) }, 257 #endif 258 { DDB_ADD_CMD("mbuf", db_mbuf_print_cmd, 0,NULL,NULL, 259 "-c prints all mbuf chains") }, 260 { DDB_ADD_CMD("ncache", db_namecache_print_cmd, 0, 261 "Dump the namecache list.", "address",NULL) }, 262 { DDB_ADD_CMD("object", db_object_print_cmd, 0, 263 "Print the vm_object at address.", "[/f] address",NULL) }, 264 { DDB_ADD_CMD("page", db_page_print_cmd, 0, 265 "Print the vm_page at address.", "[/f] address",NULL) }, 266 { DDB_ADD_CMD("pool", db_pool_print_cmd, 0, 267 "Print the pool at address.", "[/clp] address",NULL) }, 268 { DDB_ADD_CMD("registers", db_show_regs, 0, 269 "Display the register set.", "[/u]",NULL) }, 270 { DDB_ADD_CMD("sched_qs", db_show_sched_qs, 0, 271 "Print the state of the scheduler's run queues.", 272 NULL,NULL) }, 273 { DDB_ADD_CMD("uvmexp", db_uvmexp_print_cmd, 0, 274 "Print a selection of UVM counters and statistics.", 275 NULL,NULL) }, 276 #ifdef UVMHIST 277 { DDB_ADD_CMD("uvmhist", db_uvmhist_print_cmd, 0, 278 "Print the UVM history logs.", 279 NULL,NULL) }, 280 #endif 281 { DDB_ADD_CMD("vnode", db_vnode_print_cmd, 0, 282 "Print the vnode at address.", "[/f] address",NULL) }, 283 { DDB_ADD_CMD("vmem", db_vmem_print_cmd, 0, 284 "Print the vmem usage.", "[/a] address", NULL) }, 285 { DDB_ADD_CMD("vmems", db_show_all_vmems, 0, 286 "Show all vmems.", NULL, NULL) }, 287 #ifdef _KERNEL 288 { DDB_ADD_CMD("watches", db_listwatch_cmd, 0, 289 "Display all watchpoints.", NULL,NULL) }, 290 #endif 291 { DDB_ADD_CMD(NULL, NULL, 0,NULL,NULL,NULL) } 292 }; 293 294 /* arch/<arch>/<arch>/db_interface.c */ 295 #ifdef DB_MACHINE_COMMANDS 296 extern const struct db_command db_machine_command_table[]; 297 #endif 298 299 static const struct db_command db_command_table[] = { 300 { DDB_ADD_CMD("b", db_breakpoint_cmd, 0, 301 "Set a breakpoint at address", "[/u] address[,count].",NULL) }, 302 { DDB_ADD_CMD("break", db_breakpoint_cmd, 0, 303 "Set a breakpoint at address", "[/u] address[,count].",NULL) }, 304 { DDB_ADD_CMD("bt", db_stack_trace_cmd, 0, 305 "Show backtrace.", "See help trace.",NULL) }, 306 { DDB_ADD_CMD("c", db_continue_cmd, 0, 307 "Continue execution.", "[/c]",NULL) }, 308 { DDB_ADD_CMD("call", db_fncall, CS_OWN, 309 "Call the function", "address[(expression[,...])]",NULL) }, 310 #ifdef _KERNEL /* XXX CRASH(8) */ 311 { DDB_ADD_CMD("callout", db_show_callout, 0, NULL, 312 NULL,NULL ) }, 313 #endif 314 { DDB_ADD_CMD("continue", db_continue_cmd, 0, 315 "Continue execution.", "[/c]",NULL) }, 316 { DDB_ADD_CMD("d", db_delete_cmd, 0, 317 "Delete a breakpoint.", "address | #number",NULL) }, 318 { DDB_ADD_CMD("delete", db_delete_cmd, 0, 319 "Delete a breakpoint.", "address | #number",NULL) }, 320 { DDB_ADD_CMD("dmesg", db_dmesg, 0, 321 "Show kernel message buffer.", "[count]",NULL) }, 322 { DDB_ADD_CMD("dwatch", db_deletewatch_cmd, 0, 323 "Delete the watchpoint.", "address",NULL) }, 324 { DDB_ADD_CMD("examine", db_examine_cmd, CS_SET_DOT, 325 "Display the address locations.", 326 "[/modifier] address[,count]",NULL) }, 327 { DDB_ADD_CMD("exit", db_continue_cmd, 0, 328 "Continue execution.", "[/c]",NULL) }, 329 { DDB_ADD_CMD("help", db_help_print_cmd, CS_OWN|CS_NOREPEAT, 330 "Display help about commands", 331 "Use other commands as arguments.",NULL) }, 332 { DDB_ADD_CMD("kill", db_kill_proc, CS_OWN, 333 "Send a signal to the process","pid[,signal_number]", 334 " pid:\t\t\tthe process id (may need 0t prefix for decimal)\n" 335 " signal_number:\tthe signal to send") }, 336 #ifdef KGDB 337 { DDB_ADD_CMD("kgdb", db_kgdb_cmd, 0, NULL,NULL,NULL) }, 338 #endif 339 { DDB_ADD_CMD("machine",NULL,CS_MACH, 340 "Architecture specific functions.",NULL,NULL) }, 341 { DDB_ADD_CMD("match", db_trace_until_matching_cmd,0, 342 "Stop at the matching return instruction.","See help next",NULL) }, 343 { DDB_ADD_CMD("next", db_trace_until_matching_cmd,0, 344 "Stop at the matching return instruction.","[/p]",NULL) }, 345 { DDB_ADD_CMD("p", db_print_cmd, 0, 346 "Print address according to the format.", 347 "[/axzodurc] address [address ...]",NULL) }, 348 { DDB_ADD_CMD("print", db_print_cmd, 0, 349 "Print address according to the format.", 350 "[/axzodurc] address [address ...]",NULL) }, 351 { DDB_ADD_CMD("ps", db_show_all_procs, 0, 352 "Print all processes.","See show all procs",NULL) }, 353 { DDB_ADD_CMD("quit", db_continue_cmd, 0, 354 "Continue execution.", "[/c]",NULL) }, 355 { DDB_ADD_CMD("reboot", db_reboot_cmd, CS_OWN, 356 "Reboot","0x1 RB_ASKNAME, 0x2 RB_SINGLE, 0x4 RB_NOSYNC, 0x8 RB_HALT," 357 "0x40 RB_KDB, 0x100 RB_DUMP, 0x808 RB_POWERDOWN",NULL) }, 358 { DDB_ADD_CMD("s", db_single_step_cmd, 0, 359 "Single-step count times.","[/p] [,count]",NULL) }, 360 { DDB_ADD_CMD("search", db_search_cmd, CS_OWN|CS_SET_DOT, 361 "Search memory from address for value.", 362 "[/bhl] address value [mask] [,count]",NULL) }, 363 { DDB_ADD_CMD("set", db_set_cmd, CS_OWN, 364 "Set the named variable","$variable [=] expression",NULL) }, 365 { DDB_ADD_CMD("show", NULL, CS_SHOW, 366 "Show kernel stats.", NULL,NULL) }, 367 { DDB_ADD_CMD("sifting", db_sifting_cmd, CS_OWN, 368 "Search the symbol tables ","[/F] string",NULL) }, 369 { DDB_ADD_CMD("step", db_single_step_cmd, 0, 370 "Single-step count times.","[/p] [,count]",NULL) }, 371 { DDB_ADD_CMD("sync", db_sync_cmd, CS_OWN, 372 "Force a crash dump, and then reboot.",NULL,NULL) }, 373 { DDB_ADD_CMD("trace", db_stack_trace_cmd, 0, 374 "Stack trace from frame-address.", 375 "[/u[l]] [frame-address][,count]",NULL) }, 376 { DDB_ADD_CMD("until", db_trace_until_call_cmd,0, 377 "Stop at the next call or return instruction.","[/p]",NULL) }, 378 { DDB_ADD_CMD("w", db_write_cmd, CS_MORE|CS_SET_DOT, 379 "Write the expressions at succeeding locations.", 380 "[/bhl] address expression [expression ...]",NULL) }, 381 { DDB_ADD_CMD("watch", db_watchpoint_cmd, CS_MORE, 382 "Set a watchpoint for a region. ","address[,size]",NULL) }, 383 { DDB_ADD_CMD("whatis", db_whatis_cmd, 0, 384 "Describe what an address is", "address", NULL) }, 385 { DDB_ADD_CMD("write", db_write_cmd, CS_MORE|CS_SET_DOT, 386 "Write the expressions at succeeding locations.", 387 "[/bhl] address expression [expression ...]",NULL) }, 388 { DDB_ADD_CMD("x", db_examine_cmd, CS_SET_DOT, 389 "Display the address locations.", 390 "[/modifier] address[,count]",NULL) }, 391 { DDB_ADD_CMD(NULL, NULL, 0, NULL, NULL, NULL) } 392 }; 393 394 static const struct db_command *db_last_command = NULL; 395 #if defined(DDB_COMMANDONENTER) 396 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 397 #else /* defined(DDB_COMMANDONENTER) */ 398 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 399 #endif /* defined(DDB_COMMANDONENTER) */ 400 #define DB_LINE_SEP ';' 401 402 /* 403 * Execute commandlist after ddb start 404 * This function goes through the command list created from commands and ';' 405 */ 406 static void 407 db_execute_commandlist(const char *cmdlist) 408 { 409 const char *cmd = cmdlist; 410 const struct db_command *dummy = NULL; 411 412 while (*cmd != '\0') { 413 const char *ep = cmd; 414 415 while (*ep != '\0' && *ep != DB_LINE_SEP) { 416 ep++; 417 } 418 db_set_line(cmd, ep); 419 db_command(&dummy); 420 cmd = ep; 421 if (*cmd == DB_LINE_SEP) { 422 cmd++; 423 } 424 } 425 } 426 427 /* Initialize ddb command tables */ 428 void 429 db_init_commands(void) 430 { 431 static bool done = false; 432 433 if (done) return; 434 done = true; 435 436 /* register command tables */ 437 (void)db_register_tbl_entry(DDB_BASE_CMD, &db_base_cmd_builtins); 438 #ifdef DB_MACHINE_COMMANDS 439 (void)db_register_tbl_entry(DDB_MACH_CMD, &db_mach_cmd_builtins); 440 #endif 441 (void)db_register_tbl_entry(DDB_SHOW_CMD, &db_show_cmd_builtins); 442 } 443 444 445 /* 446 * Add command table to the specified list 447 * Arg: 448 * int type specifies type of command table DDB_SHOW_CMD|DDB_BASE_CMD|DDB_MAC_CMD 449 * *cmd_tbl poiter to static allocated db_command table 450 * 451 * Command table must be NULL terminated array of struct db_command 452 */ 453 int 454 db_register_tbl(uint8_t type, const struct db_command *cmd_tbl) 455 { 456 struct db_cmd_tbl_en *list_ent; 457 458 /* empty list - ignore */ 459 if (cmd_tbl->name == 0) 460 return 0; 461 462 /* force builtin commands to be registered first */ 463 db_init_commands(); 464 465 /* now create a list entry for this table */ 466 list_ent = db_zalloc(sizeof(*list_ent)); 467 if (list_ent == NULL) 468 return ENOMEM; 469 list_ent->db_cmd=cmd_tbl; 470 471 /* and register it */ 472 return db_register_tbl_entry(type, list_ent); 473 } 474 475 static int 476 db_register_tbl_entry(uint8_t type, struct db_cmd_tbl_en *list_ent) 477 { 478 struct db_cmd_tbl_en_head *list; 479 480 switch(type) { 481 case DDB_BASE_CMD: 482 list = &db_base_cmd_list; 483 break; 484 case DDB_SHOW_CMD: 485 list = &db_show_cmd_list; 486 break; 487 case DDB_MACH_CMD: 488 list = &db_mach_cmd_list; 489 break; 490 default: 491 return ENOENT; 492 } 493 494 TAILQ_INSERT_TAIL(list, list_ent, db_cmd_next); 495 496 return 0; 497 } 498 499 /* 500 * Remove command table specified with db_cmd address == cmd_tbl 501 */ 502 int 503 db_unregister_tbl(uint8_t type,const struct db_command *cmd_tbl) 504 { 505 struct db_cmd_tbl_en *list_ent; 506 struct db_cmd_tbl_en_head *list; 507 508 /* find list on which the entry should live */ 509 switch (type) { 510 case DDB_BASE_CMD: 511 list=&db_base_cmd_list; 512 break; 513 case DDB_SHOW_CMD: 514 list=&db_show_cmd_list; 515 break; 516 case DDB_MACH_CMD: 517 list=&db_mach_cmd_list; 518 break; 519 default: 520 return EINVAL; 521 } 522 523 TAILQ_FOREACH (list_ent, list, db_cmd_next) { 524 if (list_ent->db_cmd == cmd_tbl){ 525 TAILQ_REMOVE(list, 526 list_ent, db_cmd_next); 527 db_free(list_ent, sizeof(*list_ent)); 528 return 0; 529 } 530 } 531 return ENOENT; 532 } 533 534 /* This function is called from machine trap code. */ 535 void 536 db_command_loop(void) 537 { 538 label_t db_jmpbuf; 539 label_t *savejmp; 540 541 /* 542 * Initialize 'prev' and 'next' to dot. 543 */ 544 db_prev = db_dot; 545 db_next = db_dot; 546 547 db_cmd_loop_done = false; 548 549 /* Init default command tables add machine, base, 550 show command tables to the list */ 551 db_init_commands(); 552 553 /* save context for return from ddb */ 554 savejmp = db_recover; 555 db_recover = &db_jmpbuf; 556 (void) setjmp(&db_jmpbuf); 557 558 /* Execute default ddb start commands */ 559 db_execute_commandlist(db_cmd_on_enter); 560 561 (void) setjmp(&db_jmpbuf); 562 while (!db_cmd_loop_done) { 563 if (db_print_position() != 0) 564 db_printf("\n"); 565 db_output_line = 0; 566 (void) db_read_line(); 567 db_command(&db_last_command); 568 } 569 570 db_recover = savejmp; 571 } 572 573 /* 574 * Search command table for command prefix 575 */ 576 static int 577 db_cmd_search_table(const char *name, 578 const struct db_command *table, 579 const struct db_command **cmdp) 580 { 581 582 const struct db_command *cmd; 583 int result; 584 585 result = CMD_NONE; 586 *cmdp = NULL; 587 588 for (cmd = table; cmd->name != 0; cmd++) { 589 const char *lp; 590 const char *rp; 591 592 lp = name; 593 rp = cmd->name; 594 while (*lp != '\0' && *lp == *rp) { 595 rp++; 596 lp++; 597 } 598 599 if (*lp != '\0') /* mismatch or extra chars in name */ 600 continue; 601 602 if (*rp == '\0') { /* exact match */ 603 *cmdp = cmd; 604 return (CMD_EXACT); 605 } 606 607 /* prefix match: end of name, not end of command */ 608 if (result == CMD_NONE) { 609 result = CMD_PREFIX; 610 *cmdp = cmd; 611 } 612 else if (result == CMD_PREFIX) { 613 result = CMD_AMBIGUOUS; 614 *cmdp = NULL; 615 } 616 } 617 618 return (result); 619 } 620 621 622 /* 623 * Search list of command tables for command 624 */ 625 static int 626 db_cmd_search(const char *name, 627 struct db_cmd_tbl_en_head *list_head, 628 const struct db_command **cmdp) 629 { 630 struct db_cmd_tbl_en *list_ent; 631 const struct db_command *found_command; 632 bool accept_prefix_match; 633 int result; 634 635 result = CMD_NONE; 636 found_command = NULL; 637 accept_prefix_match = true; 638 639 TAILQ_FOREACH(list_ent, list_head, db_cmd_next) { 640 const struct db_command *cmd; 641 int found; 642 643 found = db_cmd_search_table(name, list_ent->db_cmd, &cmd); 644 if (found == CMD_EXACT) { 645 result = CMD_EXACT; 646 found_command = cmd; 647 break; 648 } 649 650 if (found == CMD_PREFIX) { 651 if (accept_prefix_match) { 652 /* 653 * Continue search, but note current result 654 * in case we won't find anything else. 655 */ 656 accept_prefix_match = false; 657 result = CMD_PREFIX; 658 found_command = cmd; 659 } else { 660 /* 661 * Watch out for globally ambiguous 662 * prefix match that is not locally 663 * ambiguous - with one match in one 664 * table and another match(es) in 665 * another table. 666 */ 667 result = CMD_AMBIGUOUS; 668 found_command = NULL; 669 } 670 } 671 else if (found == CMD_AMBIGUOUS) { 672 accept_prefix_match = false; 673 result = CMD_AMBIGUOUS; 674 found_command = NULL; 675 } 676 } 677 678 *cmdp = found_command; 679 return result; 680 } 681 682 static void 683 db_cmd_search_failed(char *name, int search_result) 684 { 685 if (search_result == CMD_NONE) 686 db_printf("No such command: %s\n", name); 687 else 688 db_printf("Ambiguous command: %s\n", name); 689 } 690 691 692 /* 693 * List commands to the console. 694 */ 695 static void 696 db_cmd_list(const struct db_cmd_tbl_en_head *list) 697 { 698 699 struct db_cmd_tbl_en *list_ent; 700 const struct db_command *table; 701 size_t i, j, w, columns, lines, numcmds, width=0; 702 const char *p; 703 704 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 705 table = list_ent->db_cmd; 706 for (i = 0; table[i].name != NULL; i++) { 707 w = strlen(table[i].name); 708 if (w > width) 709 width = w; 710 } 711 } 712 713 width = DB_NEXT_TAB(width); 714 715 columns = db_max_width / width; 716 if (columns == 0) 717 columns = 1; 718 719 TAILQ_FOREACH(list_ent,list,db_cmd_next) { 720 table = list_ent->db_cmd; 721 722 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) 723 ; 724 lines = (numcmds + columns - 1) / columns; 725 726 for (i = 0; i < lines; i++) { 727 for (j = 0; j < columns; j++) { 728 p = table[j * lines + i].name; 729 if (p) 730 db_printf("%s", p); 731 if (j * lines + i + lines >= numcmds) { 732 db_putchar('\n'); 733 break; 734 } 735 if (p) { 736 w = strlen(p); 737 while (w < width) { 738 w = DB_NEXT_TAB(w); 739 db_putchar('\t'); 740 } 741 } 742 } 743 } 744 } 745 return; 746 } 747 748 /* 749 * Read complete command with all subcommands, starting with current 750 * db_tok_string. If subcommand is missing, print the list of all 751 * subcommands. If command/subcommand is not found, print an error 752 * message. Returns pointer to "leaf" command or NULL. 753 */ 754 static const struct db_command * 755 db_read_command(void) 756 { 757 const struct db_command *command; 758 struct db_cmd_tbl_en_head *list; 759 int found; 760 int t; 761 762 list = &db_base_cmd_list; 763 do { 764 found = db_cmd_search(db_tok_string, list, &command); 765 if (command == NULL) { 766 db_cmd_search_failed(db_tok_string, found); 767 db_flush_lex(); 768 return NULL; 769 } 770 771 if (command->flag == CS_SHOW) 772 list = &db_show_cmd_list; 773 else if (command->flag == CS_MACH) 774 list = &db_mach_cmd_list; 775 else if (command->flag == CS_COMPAT) 776 /* same list */; 777 else 778 break; /* expect no more subcommands */ 779 780 t = db_read_token(); /* read subcommand */ 781 if (t != tIDENT) { 782 /* if none given - just print all of them */ 783 db_cmd_list(list); 784 db_flush_lex(); 785 return NULL; 786 } 787 } while (list != NULL); 788 789 return command; 790 } 791 792 /* 793 * Parse command line and execute apropriate function. 794 */ 795 static void 796 db_command(const struct db_command **last_cmdp) 797 { 798 const struct db_command *command; 799 static db_expr_t last_count = 0; 800 db_expr_t addr, count; 801 char modif[TOK_STRING_SIZE]; 802 803 int t; 804 bool have_addr = false; 805 806 command = NULL; 807 808 t = db_read_token(); 809 if ((t == tEOL) || (t == tCOMMA)) { 810 /* 811 * An empty line repeats last command, at 'next'. 812 * Only a count repeats the last command with the new count. 813 */ 814 command = *last_cmdp; 815 816 if (!command) 817 return; 818 819 addr = (db_expr_t)db_next; 820 if (t == tCOMMA) { 821 if (!db_expression(&count)) { 822 db_printf("Count missing\n"); 823 db_flush_lex(); 824 return; 825 } 826 } else 827 count = last_count; 828 have_addr = false; 829 modif[0] = '\0'; 830 db_skip_to_eol(); 831 832 } else if (t == tEXCL) { 833 db_fncall(0, 0, 0, NULL); 834 return; 835 836 } else if (t != tIDENT) { 837 db_printf("?\n"); 838 db_flush_lex(); 839 return; 840 841 } else { 842 843 command = db_read_command(); 844 if (command == NULL) 845 return; 846 847 if ((command->flag & CS_OWN) == 0) { 848 849 /* 850 * Standard syntax: 851 * command [/modifier] [addr] [,count] 852 */ 853 t = db_read_token(); /* get modifier */ 854 if (t == tSLASH) { 855 t = db_read_token(); 856 if (t != tIDENT) { 857 db_printf("Bad modifier\n"); 858 db_flush_lex(); 859 return; 860 } 861 /* save modifier */ 862 strlcpy(modif, db_tok_string, sizeof(modif)); 863 864 } else { 865 db_unread_token(t); 866 modif[0] = '\0'; 867 } 868 869 if (db_expression(&addr)) { /*get address*/ 870 db_dot = (db_addr_t) addr; 871 db_last_addr = db_dot; 872 have_addr = true; 873 } else { 874 addr = (db_expr_t) db_dot; 875 have_addr = false; 876 } 877 878 t = db_read_token(); 879 if (t == tCOMMA) { /*Get count*/ 880 if (!db_expression(&count)) { 881 db_printf("Count missing\n"); 882 db_flush_lex(); 883 return; 884 } 885 } else { 886 db_unread_token(t); 887 count = -1; 888 } 889 if ((command->flag & CS_MORE) == 0) { 890 db_skip_to_eol(); 891 } 892 } 893 } 894 895 if (command != NULL && command->flag & CS_NOREPEAT) { 896 *last_cmdp = NULL; 897 last_count = 0; 898 } else { 899 *last_cmdp = command; 900 last_count = count; 901 } 902 903 904 if (command != NULL) { 905 /* 906 * Execute the command. 907 */ 908 if (command->fcn != NULL) 909 (*command->fcn)(addr, have_addr, count, modif); 910 911 if (command->flag & CS_SET_DOT) { 912 /* 913 * If command changes dot, set dot to 914 * previous address displayed (if 'ed' style). 915 */ 916 if (db_ed_style) 917 db_dot = db_prev; 918 else 919 db_dot = db_next; 920 } else { 921 /* 922 * If command does not change dot, 923 * set 'next' location to be the same. 924 */ 925 db_next = db_dot; 926 } 927 } 928 } 929 930 /* 931 * Print help for commands 932 */ 933 static void 934 db_help_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 935 const char *modif) 936 { 937 const struct db_command *command; 938 int t; 939 940 t = db_read_token(); 941 942 /* is there another command after the "help"? */ 943 if (t != tIDENT) { 944 /* print base commands */ 945 db_cmd_list(&db_base_cmd_list); 946 return; 947 } 948 949 command = db_read_command(); 950 if (command == NULL) 951 return; 952 953 #ifdef DDB_VERBOSE_HELP 954 db_printf("Command: %s\n", command->name); 955 if (command->cmd_descr != NULL) 956 db_printf(" Description: %s\n", command->cmd_descr); 957 if (command->cmd_arg != NULL) 958 db_printf(" Arguments: %s\n", command->cmd_arg); 959 if (command->cmd_arg_help != NULL) 960 db_printf(" Arguments description:\n%s\n", 961 command->cmd_arg_help); 962 if ((command->cmd_arg == NULL) && (command->cmd_descr == NULL)) 963 db_printf(" No help message.\n"); 964 #endif 965 966 db_skip_to_eol(); 967 } 968 969 /*ARGSUSED*/ 970 static void 971 db_map_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 972 const char *modif) 973 { 974 bool full = false; 975 976 if (modif[0] == 'f') 977 full = true; 978 979 if (have_addr == false) 980 addr = (db_expr_t)(uintptr_t)db_read_ptr("kernel_map"); 981 982 #ifdef _KERNEL 983 uvm_map_printit((struct vm_map *)(uintptr_t) addr, full, db_printf); 984 #endif /* XXX CRASH(8) */ 985 } 986 987 /*ARGSUSED*/ 988 static void 989 db_malloc_print_cmd(db_expr_t addr, bool have_addr, 990 db_expr_t count, const char *modif) 991 { 992 993 #ifdef MALLOC_DEBUG 994 if (!have_addr) 995 addr = 0; 996 997 debug_malloc_printit(db_printf, (vaddr_t) addr); 998 #else 999 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 1000 #endif /* MALLOC_DEBUG */ 1001 } 1002 1003 /*ARGSUSED*/ 1004 static void 1005 db_object_print_cmd(db_expr_t addr, bool have_addr, 1006 db_expr_t count, const char *modif) 1007 { 1008 bool full = false; 1009 1010 if (modif[0] == 'f') 1011 full = true; 1012 1013 #ifdef _KERNEL /* XXX CRASH(8) */ 1014 uvm_object_printit((struct uvm_object *)(uintptr_t) addr, full, 1015 db_printf); 1016 #endif 1017 } 1018 1019 /*ARGSUSED*/ 1020 static void 1021 db_page_print_cmd(db_expr_t addr, bool have_addr, 1022 db_expr_t count, const char *modif) 1023 { 1024 bool full = false; 1025 1026 if (modif[0] == 'f') 1027 full = true; 1028 1029 #ifdef _KERNEL /* XXX CRASH(8) */ 1030 uvm_page_printit((struct vm_page *)(uintptr_t) addr, full, db_printf); 1031 #endif 1032 } 1033 1034 /*ARGSUSED*/ 1035 static void 1036 db_show_all_pages(db_expr_t addr, bool have_addr, 1037 db_expr_t count, const char *modif) 1038 { 1039 1040 #ifdef _KERNEL /* XXX CRASH(8) */ 1041 uvm_page_printall(db_printf); 1042 #endif 1043 } 1044 1045 /*ARGSUSED*/ 1046 static void 1047 db_buf_print_cmd(db_expr_t addr, bool have_addr, 1048 db_expr_t count, const char *modif) 1049 { 1050 bool full = false; 1051 1052 if (modif[0] == 'f') 1053 full = true; 1054 1055 #ifdef _KERNEL /* XXX CRASH(8) */ 1056 vfs_buf_print((struct buf *)(uintptr_t) addr, full, db_printf); 1057 #endif 1058 } 1059 1060 /*ARGSUSED*/ 1061 static void 1062 db_event_print_cmd(db_expr_t addr, bool have_addr, 1063 db_expr_t count, const char *modif) 1064 { 1065 bool showzero = false; 1066 bool showall = true; 1067 bool showintr = false; 1068 bool showtrap = false; 1069 bool showmisc = false; 1070 struct evcnt ev, *evp; 1071 char buf[80]; 1072 int i; 1073 1074 i = 0; 1075 while (modif[i]) { 1076 switch (modif[i]) { 1077 case 'f': 1078 showzero = true; 1079 break; 1080 case 'i': 1081 showintr = true; 1082 showall = false; 1083 break; 1084 case 't': 1085 showtrap = true; 1086 showall = false; 1087 break; 1088 case 'm': 1089 showmisc = true; 1090 showall = false; 1091 break; 1092 } 1093 i++; 1094 } 1095 1096 if (showall) 1097 showmisc = showintr = showtrap = true; 1098 1099 evp = (struct evcnt *)db_read_ptr("allevents"); 1100 while (evp != NULL) { 1101 db_read_bytes((db_addr_t)evp, sizeof(ev), (char *)&ev); 1102 evp = ev.ev_list.tqe_next; 1103 if (ev.ev_count == 0 && !showzero) 1104 continue; 1105 if (ev.ev_type == EVCNT_TYPE_INTR && !showintr) 1106 continue; 1107 if (ev.ev_type == EVCNT_TYPE_TRAP && !showtrap) 1108 continue; 1109 if (ev.ev_type == EVCNT_TYPE_MISC && !showmisc) 1110 continue; 1111 db_read_bytes((db_addr_t)ev.ev_group, ev.ev_grouplen + 1, buf); 1112 db_printf("evcnt type %d: %s ", ev.ev_type, buf); 1113 db_read_bytes((db_addr_t)ev.ev_name, ev.ev_namelen + 1, buf); 1114 db_printf("%s = %lld\n", buf, (long long)ev.ev_count); 1115 } 1116 } 1117 1118 /*ARGSUSED*/ 1119 static void 1120 db_vnode_print_cmd(db_expr_t addr, bool have_addr, 1121 db_expr_t count, const char *modif) 1122 { 1123 bool full = false; 1124 1125 if (modif[0] == 'f') 1126 full = true; 1127 1128 #ifdef _KERNEL /* XXX CRASH(8) */ 1129 vfs_vnode_print((struct vnode *)(uintptr_t) addr, full, db_printf); 1130 #endif 1131 } 1132 1133 /*ARGSUSED*/ 1134 static void 1135 db_vmem_print_cmd(db_expr_t addr, bool have_addr, 1136 db_expr_t count, const char *modif) 1137 { 1138 1139 #ifdef _KERNEL /* XXX CRASH(8) */ 1140 vmem_print((uintptr_t) addr, modif, db_printf); 1141 #endif 1142 } 1143 1144 static void 1145 db_mount_print_cmd(db_expr_t addr, bool have_addr, 1146 db_expr_t count, const char *modif) 1147 { 1148 bool full = false; 1149 1150 if (modif[0] == 'f') 1151 full = true; 1152 1153 #ifdef _KERNEL /* XXX CRASH(8) */ 1154 vfs_mount_print((struct mount *)(uintptr_t) addr, full, db_printf); 1155 #endif 1156 } 1157 1158 /*ARGSUSED*/ 1159 static void 1160 db_mbuf_print_cmd(db_expr_t addr, bool have_addr, 1161 db_expr_t count, const char *modif) 1162 { 1163 1164 #ifdef _KERNEL /* XXX CRASH(8) */ 1165 m_print((const struct mbuf *)(uintptr_t) addr, modif, db_printf); 1166 #endif 1167 } 1168 1169 /*ARGSUSED*/ 1170 static void 1171 db_pool_print_cmd(db_expr_t addr, bool have_addr, 1172 db_expr_t count, const char *modif) 1173 { 1174 1175 #ifdef _KERNEL /* XXX CRASH(8) */ 1176 pool_printit((struct pool *)(uintptr_t) addr, modif, db_printf); 1177 #endif 1178 } 1179 1180 /*ARGSUSED*/ 1181 static void 1182 db_namecache_print_cmd(db_expr_t addr, bool have_addr, 1183 db_expr_t count, const char *modif) 1184 { 1185 1186 #ifdef _KERNEL /* XXX CRASH(8) */ 1187 namecache_print((struct vnode *)(uintptr_t) addr, db_printf); 1188 #endif 1189 } 1190 1191 /*ARGSUSED*/ 1192 static void 1193 db_uvmexp_print_cmd(db_expr_t addr, bool have_addr, 1194 db_expr_t count, const char *modif) 1195 { 1196 1197 #ifdef _KERNEL /* XXX CRASH(8) */ 1198 uvmexp_print(db_printf); 1199 #endif 1200 } 1201 1202 #ifdef UVMHIST 1203 /*ARGSUSED*/ 1204 static void 1205 db_uvmhist_print_cmd(db_expr_t addr, bool have_addr, 1206 db_expr_t count, const char *modif) 1207 { 1208 1209 uvmhist_print(db_printf); 1210 } 1211 #endif 1212 1213 /*ARGSUSED*/ 1214 static void 1215 db_lock_print_cmd(db_expr_t addr, bool have_addr, 1216 db_expr_t count, const char *modif) 1217 { 1218 1219 #ifdef _KERNEL /* XXX CRASH(8) */ 1220 lockdebug_lock_print((void *)(uintptr_t)addr, db_printf); 1221 #endif 1222 } 1223 1224 /* 1225 * Call random function: 1226 * !expr(arg,arg,arg) 1227 */ 1228 /*ARGSUSED*/ 1229 static void 1230 db_fncall(db_expr_t addr, bool have_addr, 1231 db_expr_t count, const char *modif) 1232 { 1233 #ifdef _KERNEL 1234 db_expr_t fn_addr; 1235 #define MAXARGS 11 1236 db_expr_t args[MAXARGS]; 1237 int nargs = 0; 1238 db_expr_t retval; 1239 db_expr_t (*func)(db_expr_t, ...); 1240 int t; 1241 1242 if (!db_expression(&fn_addr)) { 1243 db_printf("Bad function\n"); 1244 db_flush_lex(); 1245 return; 1246 } 1247 func = (db_expr_t (*)(db_expr_t, ...))(uintptr_t) fn_addr; 1248 1249 t = db_read_token(); 1250 if (t == tLPAREN) { 1251 if (db_expression(&args[0])) { 1252 nargs++; 1253 while ((t = db_read_token()) == tCOMMA) { 1254 if (nargs == MAXARGS) { 1255 db_printf("Too many arguments\n"); 1256 db_flush_lex(); 1257 return; 1258 } 1259 if (!db_expression(&args[nargs])) { 1260 db_printf("Argument missing\n"); 1261 db_flush_lex(); 1262 return; 1263 } 1264 nargs++; 1265 } 1266 db_unread_token(t); 1267 } 1268 if (db_read_token() != tRPAREN) { 1269 db_printf("?\n"); 1270 db_flush_lex(); 1271 return; 1272 } 1273 } 1274 db_skip_to_eol(); 1275 1276 while (nargs < MAXARGS) { 1277 args[nargs++] = 0; 1278 } 1279 1280 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 1281 args[5], args[6], args[7], args[8], args[9]); 1282 db_printf("%s\n", db_num_to_str(retval)); 1283 #else /* _KERNEL */ 1284 db_printf("This command can only be used in-kernel.\n"); 1285 #endif /* _KERNEL */ 1286 } 1287 1288 static void 1289 db_reboot_cmd(db_expr_t addr, bool have_addr, 1290 db_expr_t count, const char *modif) 1291 { 1292 #ifdef _KERNEL 1293 db_expr_t bootflags; 1294 1295 /* Flags, default to RB_AUTOBOOT */ 1296 if (!db_expression(&bootflags)) 1297 bootflags = (db_expr_t)RB_AUTOBOOT; 1298 if (db_read_token() != tEOL) { 1299 db_error("?\n"); 1300 /*NOTREACHED*/ 1301 } 1302 /* 1303 * We are leaving DDB, never to return upward. 1304 * Clear db_recover so that we can debug faults in functions 1305 * called from cpu_reboot. 1306 */ 1307 db_recover = 0; 1308 cpu_reboot((int)bootflags, NULL); 1309 #else /* _KERNEL */ 1310 db_printf("This command can only be used in-kernel.\n"); 1311 #endif /* _KERNEL */ 1312 } 1313 1314 static void 1315 db_sifting_cmd(db_expr_t addr, bool have_addr, 1316 db_expr_t count, const char *modif) 1317 { 1318 int mode, t; 1319 1320 t = db_read_token(); 1321 if (t == tSLASH) { 1322 t = db_read_token(); 1323 if (t != tIDENT) { 1324 bad_modifier: 1325 db_printf("Bad modifier\n"); 1326 db_flush_lex(); 1327 return; 1328 } 1329 if (!strcmp(db_tok_string, "F")) 1330 mode = 'F'; 1331 else 1332 goto bad_modifier; 1333 t = db_read_token(); 1334 } else 1335 mode = 0; 1336 1337 if (t == tIDENT) 1338 db_sifting(db_tok_string, mode); 1339 else { 1340 db_printf("Bad argument (non-string)\n"); 1341 db_flush_lex(); 1342 } 1343 } 1344 1345 static void 1346 db_stack_trace_cmd(db_expr_t addr, bool have_addr, db_expr_t count, const char *modif) 1347 { 1348 register const char *cp = modif; 1349 register char c; 1350 void (*pr)(const char *, ...); 1351 1352 pr = db_printf; 1353 while ((c = *cp++) != 0) 1354 if (c == 'l') 1355 pr = (void (*)(const char *, ...))printf; 1356 1357 if (count == -1) 1358 count = 65535; 1359 1360 db_stack_trace_print(addr, have_addr, count, modif, pr); 1361 } 1362 1363 static void 1364 db_sync_cmd(db_expr_t addr, bool have_addr, 1365 db_expr_t count, const char *modif) 1366 { 1367 #ifdef _KERNEL 1368 /* 1369 * We are leaving DDB, never to return upward. 1370 * Clear db_recover so that we can debug faults in functions 1371 * called from cpu_reboot. 1372 */ 1373 db_recover = 0; 1374 panicstr = "dump forced via kernel debugger"; 1375 cpu_reboot(RB_DUMP, NULL); 1376 #else /* _KERNEL */ 1377 db_printf("This command can only be used in-kernel.\n"); 1378 #endif /* _KERNEL */ 1379 } 1380 1381 /* 1382 * Describe what an address is 1383 */ 1384 void 1385 db_whatis_cmd(db_expr_t address, bool have_addr, 1386 db_expr_t count, const char *modif) 1387 { 1388 const uintptr_t addr = (uintptr_t)address; 1389 1390 db_lwp_whatis(addr, db_printf); 1391 #ifdef _KERNEL /* XXX CRASH(8) */ 1392 pool_whatis(addr, db_printf); 1393 vmem_whatis(addr, db_printf); 1394 uvm_whatis(addr, db_printf); 1395 module_whatis(addr, db_printf); 1396 #endif 1397 } 1398
Indexes created Mon Sep 22 10:09:38 GMT 2025