db_command.c revision 1.80
1 /* $NetBSD: db_command.c,v 1.80 2005/11/26 12:16:44 yamt Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /* 30 * Command dispatcher. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: db_command.c,v 1.80 2005/11/26 12:16:44 yamt Exp $"); 35 36 #include "opt_ddb.h" 37 #include "opt_kgdb.h" 38 #include "opt_inet.h" 39 #include "opt_ddbparam.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/reboot.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 #include <sys/namei.h> 47 #include <sys/pool.h> 48 #include <sys/proc.h> 49 #include <sys/vnode.h> 50 51 #include <machine/db_machdep.h> /* type definitions */ 52 53 #if defined(_KERNEL_OPT) 54 #include "opt_multiprocessor.h" 55 #endif 56 #ifdef MULTIPROCESSOR 57 #include <machine/cpu.h> 58 #endif 59 60 #include <ddb/db_lex.h> 61 #include <ddb/db_output.h> 62 #include <ddb/db_command.h> 63 #include <ddb/db_break.h> 64 #include <ddb/db_watch.h> 65 #include <ddb/db_run.h> 66 #include <ddb/db_variables.h> 67 #include <ddb/db_interface.h> 68 #include <ddb/db_sym.h> 69 #include <ddb/db_extern.h> 70 71 #include <uvm/uvm_extern.h> 72 #include <uvm/uvm_ddb.h> 73 74 #include "arp.h" 75 76 /* 77 * Results of command search. 78 */ 79 #define CMD_UNIQUE 0 80 #define CMD_FOUND 1 81 #define CMD_NONE 2 82 #define CMD_AMBIGUOUS 3 83 #define CMD_HELP 4 84 85 /* 86 * Exported global variables 87 */ 88 boolean_t db_cmd_loop_done; 89 label_t *db_recover; 90 db_addr_t db_dot; 91 db_addr_t db_last_addr; 92 db_addr_t db_prev; 93 db_addr_t db_next; 94 95 /* 96 * if 'ed' style: 'dot' is set at start of last item printed, 97 * and '+' points to next line. 98 * Otherwise: 'dot' points to next item, '..' points to last. 99 */ 100 static boolean_t db_ed_style = TRUE; 101 102 static void db_buf_print_cmd(db_expr_t, int, db_expr_t, const char *); 103 static void db_cmd_list(const struct db_command *); 104 static int db_cmd_search(const char *, const struct db_command *, 105 const struct db_command **); 106 static void db_command(const struct db_command **, 107 const struct db_command *); 108 static void db_event_print_cmd(db_expr_t, int, db_expr_t, const char *); 109 static void db_fncall(db_expr_t, int, db_expr_t, const char *); 110 static void db_malloc_print_cmd(db_expr_t, int, db_expr_t, const char *); 111 static void db_map_print_cmd(db_expr_t, int, db_expr_t, const char *); 112 static void db_namecache_print_cmd(db_expr_t, int, db_expr_t, const char *); 113 static void db_object_print_cmd(db_expr_t, int, db_expr_t, const char *); 114 static void db_page_print_cmd(db_expr_t, int, db_expr_t, const char *); 115 static void db_pool_print_cmd(db_expr_t, int, db_expr_t, const char *); 116 static void db_reboot_cmd(db_expr_t, int, db_expr_t, const char *); 117 static void db_sifting_cmd(db_expr_t, int, db_expr_t, const char *); 118 static void db_stack_trace_cmd(db_expr_t, int, db_expr_t, const char *); 119 static void db_sync_cmd(db_expr_t, int, db_expr_t, const char *); 120 static void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, const char *); 121 static void db_vnode_print_cmd(db_expr_t, int, db_expr_t, const char *); 122 static void db_mount_print_cmd(db_expr_t, int, db_expr_t, const char *); 123 124 /* 125 * 'show' commands 126 */ 127 128 static const struct db_command db_show_all_cmds[] = { 129 { "callout", db_show_callout, 0, NULL }, 130 { "procs", db_show_all_procs, 0, NULL }, 131 { NULL, NULL, 0, NULL } 132 }; 133 134 static const struct db_command db_show_cmds[] = { 135 { "all", NULL, 0, db_show_all_cmds }, 136 #if defined(INET) && (NARP > 0) 137 { "arptab", db_show_arptab, 0, NULL }, 138 #endif 139 { "breaks", db_listbreak_cmd, 0, NULL }, 140 { "buf", db_buf_print_cmd, 0, NULL }, 141 { "event", db_event_print_cmd, 0, NULL }, 142 { "malloc", db_malloc_print_cmd, 0, NULL }, 143 { "map", db_map_print_cmd, 0, NULL }, 144 { "mount", db_mount_print_cmd, 0, NULL }, 145 { "ncache", db_namecache_print_cmd, 0, NULL }, 146 { "object", db_object_print_cmd, 0, NULL }, 147 { "page", db_page_print_cmd, 0, NULL }, 148 { "pool", db_pool_print_cmd, 0, NULL }, 149 { "registers", db_show_regs, 0, NULL }, 150 { "sched_qs", db_show_sched_qs, 0, NULL }, 151 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 152 { "vnode", db_vnode_print_cmd, 0, NULL }, 153 { "watches", db_listwatch_cmd, 0, NULL }, 154 { NULL, NULL, 0, NULL } 155 }; 156 157 /* arch/<arch>/<arch>/db_interface.c */ 158 #ifdef DB_MACHINE_COMMANDS 159 extern const struct db_command db_machine_command_table[]; 160 #endif 161 162 static const struct db_command db_command_table[] = { 163 { "b", db_breakpoint_cmd, 0, NULL }, 164 { "break", db_breakpoint_cmd, 0, NULL }, 165 { "bt", db_stack_trace_cmd, 0, NULL }, 166 { "c", db_continue_cmd, 0, NULL }, 167 { "call", db_fncall, CS_OWN, NULL }, 168 { "callout", db_show_callout, 0, NULL }, 169 { "continue", db_continue_cmd, 0, NULL }, 170 { "d", db_delete_cmd, 0, NULL }, 171 { "delete", db_delete_cmd, 0, NULL }, 172 { "dmesg", db_dmesg, 0, NULL }, 173 { "dwatch", db_deletewatch_cmd, 0, NULL }, 174 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 175 { "kill", db_kill_proc, CS_OWN, NULL }, 176 #ifdef KGDB 177 { "kgdb", db_kgdb_cmd, 0, NULL }, 178 #endif 179 #ifdef DB_MACHINE_COMMANDS 180 { "machine", NULL, 0, db_machine_command_table }, 181 #endif 182 { "match", db_trace_until_matching_cmd,0, NULL }, 183 { "next", db_trace_until_matching_cmd,0, NULL }, 184 { "p", db_print_cmd, 0, NULL }, 185 { "print", db_print_cmd, 0, NULL }, 186 { "ps", db_show_all_procs, 0, NULL }, 187 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 188 { "s", db_single_step_cmd, 0, NULL }, 189 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 190 { "set", db_set_cmd, CS_OWN, NULL }, 191 { "show", NULL, 0, db_show_cmds }, 192 { "sifting", db_sifting_cmd, CS_OWN, NULL }, 193 { "step", db_single_step_cmd, 0, NULL }, 194 { "sync", db_sync_cmd, CS_OWN, NULL }, 195 { "trace", db_stack_trace_cmd, 0, NULL }, 196 { "until", db_trace_until_call_cmd,0, NULL }, 197 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 198 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 199 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 200 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 201 { NULL, NULL, 0, NULL } 202 }; 203 204 static const struct db_command *db_last_command = NULL; 205 #if defined(DDB_COMMANDONENTER) 206 const char *db_cmd_on_enter = ___STRING(DDB_COMMANDONENTER); 207 #endif /* defined(DDB_COMMANDONENTER) */ 208 #define DB_LINE_SEP ';' 209 210 /* 211 * Utility routine - discard tokens through end-of-line. 212 */ 213 void 214 db_skip_to_eol(void) 215 { 216 int t; 217 218 do { 219 t = db_read_token(); 220 } while (t != tEOL); 221 } 222 223 void 224 db_error(s) 225 const char *s; 226 { 227 228 if (s) 229 db_printf("%s", s); 230 db_flush_lex(); 231 longjmp(db_recover); 232 } 233 234 void 235 db_command_loop(void) 236 { 237 label_t db_jmpbuf; 238 label_t *savejmp; 239 240 /* 241 * Initialize 'prev' and 'next' to dot. 242 */ 243 db_prev = db_dot; 244 db_next = db_dot; 245 246 db_cmd_loop_done = 0; 247 248 savejmp = db_recover; 249 db_recover = &db_jmpbuf; 250 (void) setjmp(&db_jmpbuf); 251 252 #if defined(DDB_COMMANDONENTER) 253 if (db_cmd_on_enter != NULL) { 254 const struct db_command *dummy = NULL; 255 const char *cmd = db_cmd_on_enter; 256 257 while (*cmd != '\0') { 258 const char *ep = cmd; 259 260 while (*ep != '\0' && *ep != DB_LINE_SEP) { 261 ep++; 262 } 263 db_set_line(cmd, ep); 264 db_command(&dummy, db_command_table); 265 cmd = ep; 266 if (*cmd == DB_LINE_SEP) { 267 cmd++; 268 } 269 } 270 } 271 #endif /* defined(DDB_COMMANDONENTER) */ 272 273 while (!db_cmd_loop_done) { 274 if (db_print_position() != 0) 275 db_printf("\n"); 276 db_output_line = 0; 277 278 279 #ifdef MULTIPROCESSOR 280 db_printf("db{%ld}> ", (long)cpu_number()); 281 #else 282 db_printf("db> "); 283 #endif 284 (void) db_read_line(); 285 286 db_command(&db_last_command, db_command_table); 287 } 288 289 db_recover = savejmp; 290 } 291 292 /* 293 * Search for command prefix. 294 */ 295 static int 296 db_cmd_search(const char *name, const struct db_command *table, 297 const struct db_command **cmdp) 298 { 299 const struct db_command *cmd; 300 int result = CMD_NONE; 301 302 for (cmd = table; cmd->name != 0; cmd++) { 303 const char *lp; 304 const char *rp; 305 int c; 306 307 lp = name; 308 rp = cmd->name; 309 while ((c = *lp) == *rp) { 310 if (c == 0) { 311 /* complete match */ 312 *cmdp = cmd; 313 return (CMD_UNIQUE); 314 } 315 lp++; 316 rp++; 317 } 318 if (c == 0) { 319 /* end of name, not end of command - 320 partial match */ 321 if (result == CMD_FOUND) { 322 result = CMD_AMBIGUOUS; 323 /* but keep looking for a full match - 324 this lets us match single letters */ 325 } else { 326 *cmdp = cmd; 327 result = CMD_FOUND; 328 } 329 } 330 } 331 if (result == CMD_NONE) { 332 /* check for 'help' */ 333 if (name[0] == 'h' && name[1] == 'e' 334 && name[2] == 'l' && name[3] == 'p') 335 result = CMD_HELP; 336 } 337 return (result); 338 } 339 340 static void 341 db_cmd_list(const struct db_command *table) 342 { 343 int i, j, w, columns, lines, width=0, numcmds; 344 const char *p; 345 346 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 347 w = strlen(table[numcmds].name); 348 if (w > width) 349 width = w; 350 } 351 width = DB_NEXT_TAB(width); 352 353 columns = db_max_width / width; 354 if (columns == 0) 355 columns = 1; 356 lines = (numcmds + columns - 1) / columns; 357 for (i = 0; i < lines; i++) { 358 for (j = 0; j < columns; j++) { 359 p = table[j * lines + i].name; 360 if (p) 361 db_printf("%s", p); 362 if (j * lines + i + lines >= numcmds) { 363 db_putchar('\n'); 364 break; 365 } 366 w = strlen(p); 367 while (w < width) { 368 w = DB_NEXT_TAB(w); 369 db_putchar('\t'); 370 } 371 } 372 } 373 } 374 375 static void 376 db_command(const struct db_command **last_cmdp, 377 const struct db_command *cmd_table) 378 { 379 const struct db_command *cmd; 380 int t; 381 char modif[TOK_STRING_SIZE]; 382 db_expr_t addr, count; 383 boolean_t have_addr = FALSE; 384 int result; 385 386 static db_expr_t last_count = 0; 387 388 t = db_read_token(); 389 if ((t == tEOL) || (t == tCOMMA)) { 390 /* 391 * An empty line repeats last command, at 'next'. 392 * Only a count repeats the last command with the new count. 393 */ 394 cmd = *last_cmdp; 395 addr = (db_expr_t)db_next; 396 if (t == tCOMMA) { 397 if (!db_expression(&count)) { 398 db_printf("Count missing\n"); 399 db_flush_lex(); 400 return; 401 } 402 } else 403 count = last_count; 404 have_addr = FALSE; 405 modif[0] = '\0'; 406 db_skip_to_eol(); 407 } else if (t == tEXCL) { 408 db_fncall(0, 0, 0, NULL); 409 return; 410 } else if (t != tIDENT) { 411 db_printf("?\n"); 412 db_flush_lex(); 413 return; 414 } else { 415 /* 416 * Search for command 417 */ 418 while (cmd_table) { 419 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 420 switch (result) { 421 case CMD_NONE: 422 db_printf("No such command\n"); 423 db_flush_lex(); 424 return; 425 case CMD_AMBIGUOUS: 426 db_printf("Ambiguous\n"); 427 db_flush_lex(); 428 return; 429 case CMD_HELP: 430 db_cmd_list(cmd_table); 431 db_flush_lex(); 432 return; 433 default: 434 break; 435 } 436 if ((cmd_table = cmd->more) != 0) { 437 t = db_read_token(); 438 if (t != tIDENT) { 439 db_cmd_list(cmd_table); 440 db_flush_lex(); 441 return; 442 } 443 } 444 } 445 446 if ((cmd->flag & CS_OWN) == 0) { 447 /* 448 * Standard syntax: 449 * command [/modifier] [addr] [,count] 450 */ 451 t = db_read_token(); 452 if (t == tSLASH) { 453 t = db_read_token(); 454 if (t != tIDENT) { 455 db_printf("Bad modifier\n"); 456 db_flush_lex(); 457 return; 458 } 459 strlcpy(modif, db_tok_string, sizeof(modif)); 460 } else { 461 db_unread_token(t); 462 modif[0] = '\0'; 463 } 464 465 if (db_expression(&addr)) { 466 db_dot = (db_addr_t) addr; 467 db_last_addr = db_dot; 468 have_addr = TRUE; 469 } else { 470 addr = (db_expr_t) db_dot; 471 have_addr = FALSE; 472 } 473 t = db_read_token(); 474 if (t == tCOMMA) { 475 if (!db_expression(&count)) { 476 db_printf("Count missing\n"); 477 db_flush_lex(); 478 return; 479 } 480 } else { 481 db_unread_token(t); 482 count = -1; 483 } 484 if ((cmd->flag & CS_MORE) == 0) { 485 db_skip_to_eol(); 486 } 487 } 488 } 489 *last_cmdp = cmd; 490 last_count = count; 491 if (cmd != 0) { 492 /* 493 * Execute the command. 494 */ 495 (*cmd->fcn)(addr, have_addr, count, modif); 496 497 if (cmd->flag & CS_SET_DOT) { 498 /* 499 * If command changes dot, set dot to 500 * previous address displayed (if 'ed' style). 501 */ 502 if (db_ed_style) 503 db_dot = db_prev; 504 else 505 db_dot = db_next; 506 } else { 507 /* 508 * If command does not change dot, 509 * set 'next' location to be the same. 510 */ 511 db_next = db_dot; 512 } 513 } 514 } 515 516 /*ARGSUSED*/ 517 static void 518 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 519 { 520 boolean_t full = FALSE; 521 522 if (modif[0] == 'f') 523 full = TRUE; 524 525 if (have_addr == FALSE) 526 addr = (db_expr_t)(intptr_t) kernel_map; 527 528 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 529 } 530 531 /*ARGSUSED*/ 532 static void 533 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 534 { 535 536 #ifdef MALLOC_DEBUG 537 if (!have_addr) 538 addr = 0; 539 540 debug_malloc_printit(db_printf, (vaddr_t) addr); 541 #else 542 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 543 #endif /* MALLOC_DEBUG */ 544 } 545 546 /*ARGSUSED*/ 547 static void 548 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 549 { 550 boolean_t full = FALSE; 551 552 if (modif[0] == 'f') 553 full = TRUE; 554 555 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 556 db_printf); 557 } 558 559 /*ARGSUSED*/ 560 static void 561 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 562 { 563 boolean_t full = FALSE; 564 565 if (modif[0] == 'f') 566 full = TRUE; 567 568 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 569 } 570 571 /*ARGSUSED*/ 572 static void 573 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 574 { 575 boolean_t full = FALSE; 576 577 if (modif[0] == 'f') 578 full = TRUE; 579 580 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 581 } 582 583 /*ARGSUSED*/ 584 static void 585 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 586 { 587 boolean_t full = FALSE; 588 589 if (modif[0] == 'f') 590 full = TRUE; 591 592 event_print(full, db_printf); 593 } 594 595 /*ARGSUSED*/ 596 static void 597 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 598 { 599 boolean_t full = FALSE; 600 601 if (modif[0] == 'f') 602 full = TRUE; 603 604 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 605 } 606 607 static void 608 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 609 { 610 boolean_t full = FALSE; 611 612 if (modif[0] == 'f') 613 full = TRUE; 614 615 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 616 } 617 618 /*ARGSUSED*/ 619 static void 620 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 621 { 622 623 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 624 } 625 626 /*ARGSUSED*/ 627 static void 628 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 629 const char *modif) 630 { 631 632 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 633 } 634 635 /*ARGSUSED*/ 636 static void 637 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 638 { 639 640 uvmexp_print(db_printf); 641 } 642 643 /* 644 * Call random function: 645 * !expr(arg,arg,arg) 646 */ 647 /*ARGSUSED*/ 648 static void 649 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 650 { 651 db_expr_t fn_addr; 652 #define MAXARGS 11 653 db_expr_t args[MAXARGS]; 654 int nargs = 0; 655 db_expr_t retval; 656 db_expr_t (*func)(db_expr_t, ...); 657 int t; 658 659 if (!db_expression(&fn_addr)) { 660 db_printf("Bad function\n"); 661 db_flush_lex(); 662 return; 663 } 664 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 665 666 t = db_read_token(); 667 if (t == tLPAREN) { 668 if (db_expression(&args[0])) { 669 nargs++; 670 while ((t = db_read_token()) == tCOMMA) { 671 if (nargs == MAXARGS) { 672 db_printf("Too many arguments\n"); 673 db_flush_lex(); 674 return; 675 } 676 if (!db_expression(&args[nargs])) { 677 db_printf("Argument missing\n"); 678 db_flush_lex(); 679 return; 680 } 681 nargs++; 682 } 683 db_unread_token(t); 684 } 685 if (db_read_token() != tRPAREN) { 686 db_printf("?\n"); 687 db_flush_lex(); 688 return; 689 } 690 } 691 db_skip_to_eol(); 692 693 while (nargs < MAXARGS) { 694 args[nargs++] = 0; 695 } 696 697 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 698 args[5], args[6], args[7], args[8], args[9]); 699 db_printf("%s\n", db_num_to_str(retval)); 700 } 701 702 static void 703 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 704 { 705 db_expr_t bootflags; 706 707 /* Flags, default to RB_AUTOBOOT */ 708 if (!db_expression(&bootflags)) 709 bootflags = (db_expr_t)RB_AUTOBOOT; 710 if (db_read_token() != tEOL) { 711 db_error("?\n"); 712 /*NOTREACHED*/ 713 } 714 /* 715 * We are leaving DDB, never to return upward. 716 * Clear db_recover so that we can debug faults in functions 717 * called from cpu_reboot. 718 */ 719 db_recover = 0; 720 cpu_reboot((int)bootflags, NULL); 721 } 722 723 static void 724 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 725 { 726 int mode, t; 727 728 t = db_read_token(); 729 if (t == tSLASH) { 730 t = db_read_token(); 731 if (t != tIDENT) { 732 bad_modifier: 733 db_printf("Bad modifier\n"); 734 db_flush_lex(); 735 return; 736 } 737 if (!strcmp(db_tok_string, "F")) 738 mode = 'F'; 739 else 740 goto bad_modifier; 741 t = db_read_token(); 742 } else 743 mode = 0; 744 745 if (t == tIDENT) 746 db_sifting(db_tok_string, mode); 747 else { 748 db_printf("Bad argument (non-string)\n"); 749 db_flush_lex(); 750 } 751 } 752 753 static void 754 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 755 { 756 register const char *cp = modif; 757 register char c; 758 void (*pr)(const char *, ...); 759 760 pr = db_printf; 761 while ((c = *cp++) != 0) 762 if (c == 'l') 763 pr = printf; 764 765 if (count == -1) 766 count = 65535; 767 768 db_stack_trace_print(addr, have_addr, count, modif, pr); 769 } 770 771 static void 772 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 773 { 774 775 /* 776 * We are leaving DDB, never to return upward. 777 * Clear db_recover so that we can debug faults in functions 778 * called from cpu_reboot. 779 */ 780 db_recover = 0; 781 cpu_reboot(RB_DUMP, NULL); 782 } 783
Indexes created Tue Sep 30 07:10:03 GMT 2025