FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_command.c
1 /* $NetBSD: db_command.c,v 1.91 2006/11/16 01:32:44 christos 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@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 1.91 2006/11/16 01:32:44 christos 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/mbuf.h>
47 #include <sys/namei.h>
48 #include <sys/pool.h>
49 #include <sys/proc.h>
50 #include <sys/vnode.h>
51
52 #include <machine/db_machdep.h> /* type definitions */
53
54 #if defined(_KERNEL_OPT)
55 #include "opt_multiprocessor.h"
56 #endif
57 #ifdef MULTIPROCESSOR
58 #include <machine/cpu.h>
59 #endif
60
61 #include <ddb/db_lex.h>
62 #include <ddb/db_output.h>
63 #include <ddb/db_command.h>
64 #include <ddb/db_break.h>
65 #include <ddb/db_watch.h>
66 #include <ddb/db_run.h>
67 #include <ddb/db_variables.h>
68 #include <ddb/db_interface.h>
69 #include <ddb/db_sym.h>
70 #include <ddb/db_extern.h>
71
72 #include <uvm/uvm_extern.h>
73 #include <uvm/uvm_ddb.h>
74
75 #include "arp.h"
76
77 /*
78 * Results of command search.
79 */
80 #define CMD_UNIQUE 0
81 #define CMD_FOUND 1
82 #define CMD_NONE 2
83 #define CMD_AMBIGUOUS 3
84 #define CMD_HELP 4
85
86 /*
87 * Exported global variables
88 */
89 boolean_t db_cmd_loop_done;
90 label_t *db_recover;
91 db_addr_t db_dot;
92 db_addr_t db_last_addr;
93 db_addr_t db_prev;
94 db_addr_t db_next;
95
96 /*
97 * if 'ed' style: 'dot' is set at start of last item printed,
98 * and '+' points to next line.
99 * Otherwise: 'dot' points to next item, '..' points to last.
100 */
101 static boolean_t db_ed_style = TRUE;
102
103 static void db_buf_print_cmd(db_expr_t, int, db_expr_t, const char *);
104 static void db_cmd_list(const struct db_command *);
105 static int db_cmd_search(const char *, const struct db_command *,
106 const struct db_command **);
107 static void db_command(const struct db_command **,
108 const struct db_command *);
109 static void db_event_print_cmd(db_expr_t, int, db_expr_t, const char *);
110 static void db_fncall(db_expr_t, int, db_expr_t, const char *);
111 static void db_malloc_print_cmd(db_expr_t, int, db_expr_t, const char *);
112 static void db_map_print_cmd(db_expr_t, int, db_expr_t, const char *);
113 static void db_namecache_print_cmd(db_expr_t, int, db_expr_t, const char *);
114 static void db_object_print_cmd(db_expr_t, int, db_expr_t, const char *);
115 static void db_page_print_cmd(db_expr_t, int, db_expr_t, const char *);
116 static void db_show_all_pages(db_expr_t, int, db_expr_t, const char *);
117 static void db_pool_print_cmd(db_expr_t, int, db_expr_t, const char *);
118 static void db_reboot_cmd(db_expr_t, int, db_expr_t, const char *);
119 static void db_sifting_cmd(db_expr_t, int, db_expr_t, const char *);
120 static void db_stack_trace_cmd(db_expr_t, int, db_expr_t, const char *);
121 static void db_sync_cmd(db_expr_t, int, db_expr_t, const char *);
122 static void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, const char *);
123 static void db_vnode_print_cmd(db_expr_t, int, db_expr_t, const char *);
124 static void db_mount_print_cmd(db_expr_t, int, db_expr_t, const char *);
125 static void db_mbuf_print_cmd(db_expr_t, int, db_expr_t, const char *);
126
127 /*
128 * 'show' commands
129 */
130
131 static const struct db_command db_show_all_cmds[] = {
132 { "callout", db_show_callout, 0, NULL },
133 { "pages", db_show_all_pages, 0, NULL },
134 { "procs", db_show_all_procs, 0, NULL },
135 { "pools", db_show_all_pools, 0, NULL },
136 { NULL, NULL, 0, NULL }
137 };
138
139 static const struct db_command db_show_cmds[] = {
140 { "all", NULL, 0, db_show_all_cmds },
141 #if defined(INET) && (NARP > 0)
142 { "arptab", db_show_arptab, 0, NULL },
143 #endif
144 { "breaks", db_listbreak_cmd, 0, NULL },
145 { "buf", db_buf_print_cmd, 0, NULL },
146 { "event", db_event_print_cmd, 0, NULL },
147 { "malloc", db_malloc_print_cmd, 0, NULL },
148 { "map", db_map_print_cmd, 0, NULL },
149 { "mount", db_mount_print_cmd, 0, NULL },
150 { "mbuf", db_mbuf_print_cmd, 0, NULL },
151 { "ncache", db_namecache_print_cmd, 0, NULL },
152 { "object", db_object_print_cmd, 0, NULL },
153 { "page", db_page_print_cmd, 0, NULL },
154 { "pool", db_pool_print_cmd, 0, NULL },
155 { "registers", db_show_regs, 0, NULL },
156 { "sched_qs", db_show_sched_qs, 0, NULL },
157 { "uvmexp", db_uvmexp_print_cmd, 0, NULL },
158 { "vnode", db_vnode_print_cmd, 0, NULL },
159 { "watches", db_listwatch_cmd, 0, NULL },
160 { NULL, NULL, 0, NULL }
161 };
162
163 /* arch/<arch>/<arch>/db_interface.c */
164 #ifdef DB_MACHINE_COMMANDS
165 extern const struct db_command db_machine_command_table[];
166 #endif
167
168 static const struct db_command db_command_table[] = {
169 { "b", db_breakpoint_cmd, 0, NULL },
170 { "break", db_breakpoint_cmd, 0, NULL },
171 { "bt", db_stack_trace_cmd, 0, NULL },
172 { "c", db_continue_cmd, 0, NULL },
173 { "call", db_fncall, CS_OWN, NULL },
174 { "callout", db_show_callout, 0, NULL },
175 { "continue", db_continue_cmd, 0, NULL },
176 { "d", db_delete_cmd, 0, NULL },
177 { "delete", db_delete_cmd, 0, NULL },
178 { "dmesg", db_dmesg, 0, NULL },
179 { "dwatch", db_deletewatch_cmd, 0, NULL },
180 { "examine", db_examine_cmd, CS_SET_DOT, NULL },
181 { "kill", db_kill_proc, CS_OWN, NULL },
182 #ifdef KGDB
183 { "kgdb", db_kgdb_cmd, 0, NULL },
184 #endif
185 #ifdef DB_MACHINE_COMMANDS
186 { "machine", NULL, 0, db_machine_command_table },
187 #endif
188 { "match", db_trace_until_matching_cmd,0, NULL },
189 { "next", db_trace_until_matching_cmd,0, NULL },
190 { "p", db_print_cmd, 0, NULL },
191 { "print", db_print_cmd, 0, NULL },
192 { "ps", db_show_all_procs, 0, NULL },
193 { "reboot", db_reboot_cmd, CS_OWN, NULL },
194 { "s", db_single_step_cmd, 0, NULL },
195 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL },
196 { "set", db_set_cmd, CS_OWN, NULL },
197 { "show", NULL, 0, db_show_cmds },
198 { "sifting", db_sifting_cmd, CS_OWN, NULL },
199 { "step", db_single_step_cmd, 0, NULL },
200 { "sync", db_sync_cmd, CS_OWN, NULL },
201 { "trace", db_stack_trace_cmd, 0, NULL },
202 { "until", db_trace_until_call_cmd,0, NULL },
203 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL },
204 { "watch", db_watchpoint_cmd, CS_MORE, NULL },
205 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL },
206 { "x", db_examine_cmd, CS_SET_DOT, NULL },
207 { NULL, NULL, 0, NULL }
208 };
209
210 static const struct db_command *db_last_command = NULL;
211 #if defined(DDB_COMMANDONENTER)
212 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER);
213 #else /* defined(DDB_COMMANDONENTER) */
214 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = "";
215 #endif /* defined(DDB_COMMANDONENTER) */
216 #define DB_LINE_SEP ';'
217
218 /*
219 * Utility routine - discard tokens through end-of-line.
220 */
221 void
222 db_skip_to_eol(void)
223 {
224 int t;
225
226 do {
227 t = db_read_token();
228 } while (t != tEOL);
229 }
230
231 void
232 db_error(const char *s)
233 {
234
235 if (s)
236 db_printf("%s", s);
237 db_flush_lex();
238 longjmp(db_recover);
239 }
240
241 static void
242 db_execute_commandlist(const char *cmdlist)
243 {
244 const char *cmd = cmdlist;
245 const struct db_command *dummy = NULL;
246
247 while (*cmd != '\0') {
248 const char *ep = cmd;
249
250 while (*ep != '\0' && *ep != DB_LINE_SEP) {
251 ep++;
252 }
253 db_set_line(cmd, ep);
254 db_command(&dummy, db_command_table);
255 cmd = ep;
256 if (*cmd == DB_LINE_SEP) {
257 cmd++;
258 }
259 }
260 }
261
262 void
263 db_command_loop(void)
264 {
265 label_t db_jmpbuf;
266 label_t *savejmp;
267
268 /*
269 * Initialize 'prev' and 'next' to dot.
270 */
271 db_prev = db_dot;
272 db_next = db_dot;
273
274 db_cmd_loop_done = 0;
275
276 savejmp = db_recover;
277 db_recover = &db_jmpbuf;
278 (void) setjmp(&db_jmpbuf);
279
280 db_execute_commandlist(db_cmd_on_enter);
281
282 while (!db_cmd_loop_done) {
283 if (db_print_position() != 0)
284 db_printf("\n");
285 db_output_line = 0;
286
287
288 #ifdef MULTIPROCESSOR
289 db_printf("db{%ld}> ", (long)cpu_number());
290 #else
291 db_printf("db> ");
292 #endif
293 (void) db_read_line();
294
295 db_command(&db_last_command, db_command_table);
296 }
297
298 db_recover = savejmp;
299 }
300
301 /*
302 * Search for command prefix.
303 */
304 static int
305 db_cmd_search(const char *name, const struct db_command *table,
306 const struct db_command **cmdp)
307 {
308 const struct db_command *cmd;
309 int result = CMD_NONE;
310
311 for (cmd = table; cmd->name != 0; cmd++) {
312 const char *lp;
313 const char *rp;
314 int c;
315
316 lp = name;
317 rp = cmd->name;
318 while ((c = *lp) == *rp) {
319 if (c == 0) {
320 /* complete match */
321 *cmdp = cmd;
322 return (CMD_UNIQUE);
323 }
324 lp++;
325 rp++;
326 }
327 if (c == 0) {
328 /* end of name, not end of command -
329 partial match */
330 if (result == CMD_FOUND) {
331 result = CMD_AMBIGUOUS;
332 /* but keep looking for a full match -
333 this lets us match single letters */
334 } else {
335 *cmdp = cmd;
336 result = CMD_FOUND;
337 }
338 }
339 }
340 if (result == CMD_NONE) {
341 /* check for 'help' */
342 if (name[0] == 'h' && name[1] == 'e'
343 && name[2] == 'l' && name[3] == 'p')
344 result = CMD_HELP;
345 }
346 return (result);
347 }
348
349 static void
350 db_cmd_list(const struct db_command *table)
351 {
352 int i, j, w, columns, lines, width=0, numcmds;
353 const char *p;
354
355 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) {
356 w = strlen(table[numcmds].name);
357 if (w > width)
358 width = w;
359 }
360 width = DB_NEXT_TAB(width);
361
362 columns = db_max_width / width;
363 if (columns == 0)
364 columns = 1;
365 lines = (numcmds + columns - 1) / columns;
366 for (i = 0; i < lines; i++) {
367 for (j = 0; j < columns; j++) {
368 p = table[j * lines + i].name;
369 if (p)
370 db_printf("%s", p);
371 if (j * lines + i + lines >= numcmds) {
372 db_putchar('\n');
373 break;
374 }
375 if (p) {
376 w = strlen(p);
377 while (w < width) {
378 w = DB_NEXT_TAB(w);
379 db_putchar('\t');
380 }
381 }
382 }
383 }
384 }
385
386 static void
387 db_command(const struct db_command **last_cmdp,
388 const struct db_command *cmd_table)
389 {
390 const struct db_command *cmd;
391 int t;
392 char modif[TOK_STRING_SIZE];
393 db_expr_t addr, count;
394 boolean_t have_addr = FALSE;
395 int result;
396 static db_expr_t last_count = 0;
397
398 cmd = NULL; /* XXX gcc */
399
400 t = db_read_token();
401 if ((t == tEOL) || (t == tCOMMA)) {
402 /*
403 * An empty line repeats last command, at 'next'.
404 * Only a count repeats the last command with the new count.
405 */
406 cmd = *last_cmdp;
407 addr = (db_expr_t)db_next;
408 if (t == tCOMMA) {
409 if (!db_expression(&count)) {
410 db_printf("Count missing\n");
411 db_flush_lex();
412 return;
413 }
414 } else
415 count = last_count;
416 have_addr = FALSE;
417 modif[0] = '\0';
418 db_skip_to_eol();
419 } else if (t == tEXCL) {
420 db_fncall(0, 0, 0, NULL);
421 return;
422 } else if (t != tIDENT) {
423 db_printf("?\n");
424 db_flush_lex();
425 return;
426 } else {
427 /*
428 * Search for command
429 */
430 while (cmd_table) {
431 result = db_cmd_search(db_tok_string, cmd_table, &cmd);
432 switch (result) {
433 case CMD_NONE:
434 db_printf("No such command\n");
435 db_flush_lex();
436 return;
437 case CMD_AMBIGUOUS:
438 db_printf("Ambiguous\n");
439 db_flush_lex();
440 return;
441 case CMD_HELP:
442 db_cmd_list(cmd_table);
443 db_flush_lex();
444 return;
445 default:
446 break;
447 }
448 if ((cmd_table = cmd->more) != 0) {
449 t = db_read_token();
450 if (t != tIDENT) {
451 db_cmd_list(cmd_table);
452 db_flush_lex();
453 return;
454 }
455 }
456 }
457
458 if ((cmd->flag & CS_OWN) == 0) {
459 /*
460 * Standard syntax:
461 * command [/modifier] [addr] [,count]
462 */
463 t = db_read_token();
464 if (t == tSLASH) {
465 t = db_read_token();
466 if (t != tIDENT) {
467 db_printf("Bad modifier\n");
468 db_flush_lex();
469 return;
470 }
471 strlcpy(modif, db_tok_string, sizeof(modif));
472 } else {
473 db_unread_token(t);
474 modif[0] = '\0';
475 }
476
477 if (db_expression(&addr)) {
478 db_dot = (db_addr_t) addr;
479 db_last_addr = db_dot;
480 have_addr = TRUE;
481 } else {
482 addr = (db_expr_t) db_dot;
483 have_addr = FALSE;
484 }
485 t = db_read_token();
486 if (t == tCOMMA) {
487 if (!db_expression(&count)) {
488 db_printf("Count missing\n");
489 db_flush_lex();
490 return;
491 }
492 } else {
493 db_unread_token(t);
494 count = -1;
495 }
496 if ((cmd->flag & CS_MORE) == 0) {
497 db_skip_to_eol();
498 }
499 }
500 }
501 *last_cmdp = cmd;
502 last_count = count;
503 if (cmd != 0) {
504 /*
505 * Execute the command.
506 */
507 (*cmd->fcn)(addr, have_addr, count, modif);
508
509 if (cmd->flag & CS_SET_DOT) {
510 /*
511 * If command changes dot, set dot to
512 * previous address displayed (if 'ed' style).
513 */
514 if (db_ed_style)
515 db_dot = db_prev;
516 else
517 db_dot = db_next;
518 } else {
519 /*
520 * If command does not change dot,
521 * set 'next' location to be the same.
522 */
523 db_next = db_dot;
524 }
525 }
526 }
527
528 /*ARGSUSED*/
529 static void
530 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count,
531 const char *modif)
532 {
533 boolean_t full = FALSE;
534
535 if (modif[0] == 'f')
536 full = TRUE;
537
538 if (have_addr == FALSE)
539 addr = (db_expr_t)(intptr_t) kernel_map;
540
541 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf);
542 }
543
544 /*ARGSUSED*/
545 static void
546 db_malloc_print_cmd(db_expr_t addr, int have_addr,
547 db_expr_t count, const char *modif)
548 {
549
550 #ifdef MALLOC_DEBUG
551 if (!have_addr)
552 addr = 0;
553
554 debug_malloc_printit(db_printf, (vaddr_t) addr);
555 #else
556 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n");
557 #endif /* MALLOC_DEBUG */
558 }
559
560 /*ARGSUSED*/
561 static void
562 db_object_print_cmd(db_expr_t addr, int have_addr,
563 db_expr_t count, const char *modif)
564 {
565 boolean_t full = FALSE;
566
567 if (modif[0] == 'f')
568 full = TRUE;
569
570 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full,
571 db_printf);
572 }
573
574 /*ARGSUSED*/
575 static void
576 db_page_print_cmd(db_expr_t addr, int have_addr,
577 db_expr_t count, const char *modif)
578 {
579 boolean_t full = FALSE;
580
581 if (modif[0] == 'f')
582 full = TRUE;
583
584 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf);
585 }
586
587 /*ARGSUSED*/
588 static void
589 db_show_all_pages(db_expr_t addr, int have_addr,
590 db_expr_t count, const char *modif)
591 {
592
593 uvm_page_printall(db_printf);
594 }
595
596 /*ARGSUSED*/
597 static void
598 db_buf_print_cmd(db_expr_t addr, int have_addr,
599 db_expr_t count, const char *modif)
600 {
601 boolean_t full = FALSE;
602
603 if (modif[0] == 'f')
604 full = TRUE;
605
606 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf);
607 }
608
609 /*ARGSUSED*/
610 static void
611 db_event_print_cmd(db_expr_t addr, int have_addr,
612 db_expr_t count, const char *modif)
613 {
614 boolean_t full = FALSE;
615
616 if (modif[0] == 'f')
617 full = TRUE;
618
619 event_print(full, db_printf);
620 }
621
622 /*ARGSUSED*/
623 static void
624 db_vnode_print_cmd(db_expr_t addr, int have_addr,
625 db_expr_t count, const char *modif)
626 {
627 boolean_t full = FALSE;
628
629 if (modif[0] == 'f')
630 full = TRUE;
631
632 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf);
633 }
634
635 static void
636 db_mount_print_cmd(db_expr_t addr, int have_addr,
637 db_expr_t count, const char *modif)
638 {
639 boolean_t full = FALSE;
640
641 if (modif[0] == 'f')
642 full = TRUE;
643
644 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf);
645 }
646
647 /*ARGSUSED*/
648 static void
649 db_mbuf_print_cmd(db_expr_t addr, int have_addr,
650 db_expr_t count, const char *modif)
651 {
652
653 m_print((const struct mbuf *)(intptr_t) addr, modif, db_printf);
654 }
655
656 /*ARGSUSED*/
657 static void
658 db_pool_print_cmd(db_expr_t addr, int have_addr,
659 db_expr_t count, const char *modif)
660 {
661
662 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf);
663 }
664
665 /*ARGSUSED*/
666 static void
667 db_namecache_print_cmd(db_expr_t addr, int have_addr,
668 db_expr_t count, const char *modif)
669 {
670
671 namecache_print((struct vnode *)(intptr_t) addr, db_printf);
672 }
673
674 /*ARGSUSED*/
675 static void
676 db_uvmexp_print_cmd(db_expr_t addr, int have_addr,
677 db_expr_t count, const char *modif)
678 {
679
680 uvmexp_print(db_printf);
681 }
682
683 /*
684 * Call random function:
685 * !expr(arg,arg,arg)
686 */
687 /*ARGSUSED*/
688 static void
689 db_fncall(db_expr_t addr, int have_addr,
690 db_expr_t count, const char *modif)
691 {
692 db_expr_t fn_addr;
693 #define MAXARGS 11
694 db_expr_t args[MAXARGS];
695 int nargs = 0;
696 db_expr_t retval;
697 db_expr_t (*func)(db_expr_t, ...);
698 int t;
699
700 if (!db_expression(&fn_addr)) {
701 db_printf("Bad function\n");
702 db_flush_lex();
703 return;
704 }
705 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr;
706
707 t = db_read_token();
708 if (t == tLPAREN) {
709 if (db_expression(&args[0])) {
710 nargs++;
711 while ((t = db_read_token()) == tCOMMA) {
712 if (nargs == MAXARGS) {
713 db_printf("Too many arguments\n");
714 db_flush_lex();
715 return;
716 }
717 if (!db_expression(&args[nargs])) {
718 db_printf("Argument missing\n");
719 db_flush_lex();
720 return;
721 }
722 nargs++;
723 }
724 db_unread_token(t);
725 }
726 if (db_read_token() != tRPAREN) {
727 db_printf("?\n");
728 db_flush_lex();
729 return;
730 }
731 }
732 db_skip_to_eol();
733
734 while (nargs < MAXARGS) {
735 args[nargs++] = 0;
736 }
737
738 retval = (*func)(args[0], args[1], args[2], args[3], args[4],
739 args[5], args[6], args[7], args[8], args[9]);
740 db_printf("%s\n", db_num_to_str(retval));
741 }
742
743 static void
744 db_reboot_cmd(db_expr_t addr, int have_addr,
745 db_expr_t count, const char *modif)
746 {
747 db_expr_t bootflags;
748
749 /* Flags, default to RB_AUTOBOOT */
750 if (!db_expression(&bootflags))
751 bootflags = (db_expr_t)RB_AUTOBOOT;
752 if (db_read_token() != tEOL) {
753 db_error("?\n");
754 /*NOTREACHED*/
755 }
756 /*
757 * We are leaving DDB, never to return upward.
758 * Clear db_recover so that we can debug faults in functions
759 * called from cpu_reboot.
760 */
761 db_recover = 0;
762 cpu_reboot((int)bootflags, NULL);
763 }
764
765 static void
766 db_sifting_cmd(db_expr_t addr, int have_addr,
767 db_expr_t count, const char *modif)
768 {
769 int mode, t;
770
771 t = db_read_token();
772 if (t == tSLASH) {
773 t = db_read_token();
774 if (t != tIDENT) {
775 bad_modifier:
776 db_printf("Bad modifier\n");
777 db_flush_lex();
778 return;
779 }
780 if (!strcmp(db_tok_string, "F"))
781 mode = 'F';
782 else
783 goto bad_modifier;
784 t = db_read_token();
785 } else
786 mode = 0;
787
788 if (t == tIDENT)
789 db_sifting(db_tok_string, mode);
790 else {
791 db_printf("Bad argument (non-string)\n");
792 db_flush_lex();
793 }
794 }
795
796 static void
797 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif)
798 {
799 register const char *cp = modif;
800 register char c;
801 void (*pr)(const char *, ...);
802
803 pr = db_printf;
804 while ((c = *cp++) != 0)
805 if (c == 'l')
806 pr = printf;
807
808 if (count == -1)
809 count = 65535;
810
811 db_stack_trace_print(addr, have_addr, count, modif, pr);
812 }
813
814 static void
815 db_sync_cmd(db_expr_t addr, int have_addr,
816 db_expr_t count, const char *modif)
817 {
818
819 /*
820 * We are leaving DDB, never to return upward.
821 * Clear db_recover so that we can debug faults in functions
822 * called from cpu_reboot.
823 */
824 db_recover = 0;
825 cpu_reboot(RB_DUMP, NULL);
826 }
Cache object: fae55bae69deedd585e34d9ea74b2826
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