xref: /freebsd/sys/ddb/db_command.c (revision 9f915a92c799be0097f3376d799ddbdbc5a03912)
1dd3cb568SWarner Losh /*-
25b81b6b3SRodney W. Grimes  * Mach Operating System
35b81b6b3SRodney W. Grimes  * Copyright (c) 1991,1990 Carnegie Mellon University
45b81b6b3SRodney W. Grimes  * All Rights Reserved.
55b81b6b3SRodney W. Grimes  *
65b81b6b3SRodney W. Grimes  * Permission to use, copy, modify and distribute this software and its
75b81b6b3SRodney W. Grimes  * documentation is hereby granted, provided that both the copyright
85b81b6b3SRodney W. Grimes  * notice and this permission notice appear in all copies of the
95b81b6b3SRodney W. Grimes  * software, derivative works or modified versions, and any portions
105b81b6b3SRodney W. Grimes  * thereof, and that both notices appear in supporting documentation.
115b81b6b3SRodney W. Grimes  *
125b81b6b3SRodney W. Grimes  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
135b81b6b3SRodney W. Grimes  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
145b81b6b3SRodney W. Grimes  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
155b81b6b3SRodney W. Grimes  *
165b81b6b3SRodney W. Grimes  * Carnegie Mellon requests users of this software to return to
175b81b6b3SRodney W. Grimes  *
185b81b6b3SRodney W. Grimes  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
195b81b6b3SRodney W. Grimes  *  School of Computer Science
205b81b6b3SRodney W. Grimes  *  Carnegie Mellon University
215b81b6b3SRodney W. Grimes  *  Pittsburgh PA 15213-3890
225b81b6b3SRodney W. Grimes  *
235b81b6b3SRodney W. Grimes  * any improvements or extensions that they make and grant Carnegie the
245b81b6b3SRodney W. Grimes  * rights to redistribute these changes.
255b81b6b3SRodney W. Grimes  */
265b81b6b3SRodney W. Grimes /*
275b81b6b3SRodney W. Grimes  *	Author: David B. Golub, Carnegie Mellon University
285b81b6b3SRodney W. Grimes  *	Date:	7/90
295b81b6b3SRodney W. Grimes  */
305b81b6b3SRodney W. Grimes /*
315b81b6b3SRodney W. Grimes  * Command dispatcher.
325b81b6b3SRodney W. Grimes  */
33753960f7SDavid E. O'Brien 
34753960f7SDavid E. O'Brien #include <sys/cdefs.h>
35753960f7SDavid E. O'Brien __FBSDID("$FreeBSD$");
36753960f7SDavid E. O'Brien 
37f540b106SGarrett Wollman #include <sys/param.h>
380ec81012SJohn Polstra #include <sys/linker_set.h>
3919d2c78fSDima Dorfman #include <sys/lock.h>
4037224cd3SMarcel Moolenaar #include <sys/kdb.h>
4119d2c78fSDima Dorfman #include <sys/mutex.h>
4219d2c78fSDima Dorfman #include <sys/proc.h>
43ad146781SPaul Traina #include <sys/reboot.h>
4419d2c78fSDima Dorfman #include <sys/signalvar.h>
45f540b106SGarrett Wollman #include <sys/systm.h>
46ce9edcf5SPoul-Henning Kamp #include <sys/cons.h>
47299cceefSMarcel Moolenaar #include <sys/conf.h>
4874cc032bSPoul-Henning Kamp #include <sys/watchdog.h>
4939297ba4SSam Leffler #include <sys/kernel.h>
503000820aSPoul-Henning Kamp 
515ccbc3ccSBruce Evans #include <ddb/ddb.h>
52058284fcSBruce Evans #include <ddb/db_command.h>
535b81b6b3SRodney W. Grimes #include <ddb/db_lex.h>
545b81b6b3SRodney W. Grimes #include <ddb/db_output.h>
555b81b6b3SRodney W. Grimes 
5626502503SMarcel Moolenaar #include <machine/cpu.h>
570b1ae809SJulian Elischer #include <machine/setjmp.h>
585b81b6b3SRodney W. Grimes 
595b81b6b3SRodney W. Grimes /*
605b81b6b3SRodney W. Grimes  * Exported global variables
615b81b6b3SRodney W. Grimes  */
62cd508278SPedro F. Giffuni bool		db_cmd_loop_done;
635b81b6b3SRodney W. Grimes db_addr_t	db_dot;
645b81b6b3SRodney W. Grimes db_addr_t	db_last_addr;
655b81b6b3SRodney W. Grimes db_addr_t	db_prev;
665b81b6b3SRodney W. Grimes db_addr_t	db_next;
67f41325dbSPeter Wemm 
68299cceefSMarcel Moolenaar static db_cmdfcn_t	db_dump;
69f73a856dSPoul-Henning Kamp static db_cmdfcn_t	db_fncall;
70f3be7cb3SMarcel Moolenaar static db_cmdfcn_t	db_gdb;
71e4b732cfSBruce Evans static db_cmdfcn_t	db_halt;
7219d2c78fSDima Dorfman static db_cmdfcn_t	db_kill;
735370c3b6SPeter Wemm static db_cmdfcn_t	db_reset;
74fd32d93bSMarcel Moolenaar static db_cmdfcn_t	db_stack_trace;
75a7ad956bSRobert Watson static db_cmdfcn_t	db_stack_trace_all;
7674cc032bSPoul-Henning Kamp static db_cmdfcn_t	db_watchdog;
77ad146781SPaul Traina 
78cec9a4bfSDavid E. O'Brien /*
79cec9a4bfSDavid E. O'Brien  * 'show' commands
80cec9a4bfSDavid E. O'Brien  */
81cec9a4bfSDavid E. O'Brien 
82cec9a4bfSDavid E. O'Brien static struct command db_show_all_cmds[] = {
837fb88858SPedro F. Giffuni 	{ "trace",	db_stack_trace_all,	0,	NULL },
84cec9a4bfSDavid E. O'Brien };
8539297ba4SSam Leffler struct command_table db_show_all_table =
8639297ba4SSam Leffler     LIST_HEAD_INITIALIZER(db_show_all_table);
87e1e31c0eSJohn Baldwin 
88cec9a4bfSDavid E. O'Brien static struct command db_show_cmds[] = {
89e1e31c0eSJohn Baldwin 	{ "all",	0,			0,	&db_show_all_table },
907fb88858SPedro F. Giffuni 	{ "registers",	db_show_regs,		0,	NULL },
917fb88858SPedro F. Giffuni 	{ "breaks",	db_listbreak_cmd, 	0,	NULL },
927fb88858SPedro F. Giffuni 	{ "threads",	db_show_threads,	0,	NULL },
93cec9a4bfSDavid E. O'Brien };
9439297ba4SSam Leffler struct command_table db_show_table = LIST_HEAD_INITIALIZER(db_show_table);
95cec9a4bfSDavid E. O'Brien 
9639297ba4SSam Leffler static struct command db_cmds[] = {
977fb88858SPedro F. Giffuni 	{ "print",	db_print_cmd,		0,	NULL },
987fb88858SPedro F. Giffuni 	{ "p",		db_print_cmd,		0,	NULL },
997fb88858SPedro F. Giffuni 	{ "examine",	db_examine_cmd,		CS_SET_DOT, NULL },
1007fb88858SPedro F. Giffuni 	{ "x",		db_examine_cmd,		CS_SET_DOT, NULL },
1017fb88858SPedro F. Giffuni 	{ "search",	db_search_cmd,		CS_OWN|CS_SET_DOT, NULL },
1027fb88858SPedro F. Giffuni 	{ "set",	db_set_cmd,		CS_OWN,	NULL },
1037fb88858SPedro F. Giffuni 	{ "write",	db_write_cmd,		CS_MORE|CS_SET_DOT, NULL },
1047fb88858SPedro F. Giffuni 	{ "w",		db_write_cmd,		CS_MORE|CS_SET_DOT, NULL },
1057fb88858SPedro F. Giffuni 	{ "delete",	db_delete_cmd,		0,	NULL },
1067fb88858SPedro F. Giffuni 	{ "d",		db_delete_cmd,		0,	NULL },
1077fb88858SPedro F. Giffuni 	{ "dump",	db_dump,		0,	NULL },
1087fb88858SPedro F. Giffuni 	{ "break",	db_breakpoint_cmd,	0,	NULL },
1097fb88858SPedro F. Giffuni 	{ "b",		db_breakpoint_cmd,	0,	NULL },
1107fb88858SPedro F. Giffuni 	{ "dwatch",	db_deletewatch_cmd,	0,	NULL },
1117fb88858SPedro F. Giffuni 	{ "watch",	db_watchpoint_cmd,	CS_MORE,NULL },
1127fb88858SPedro F. Giffuni 	{ "dhwatch",	db_deletehwatch_cmd,	0,      NULL },
1137fb88858SPedro F. Giffuni 	{ "hwatch",	db_hwatchpoint_cmd,	0,      NULL },
1147fb88858SPedro F. Giffuni 	{ "step",	db_single_step_cmd,	0,	NULL },
1157fb88858SPedro F. Giffuni 	{ "s",		db_single_step_cmd,	0,	NULL },
1167fb88858SPedro F. Giffuni 	{ "continue",	db_continue_cmd,	0,	NULL },
1177fb88858SPedro F. Giffuni 	{ "c",		db_continue_cmd,	0,	NULL },
1187fb88858SPedro F. Giffuni 	{ "until",	db_trace_until_call_cmd,0,	NULL },
1197fb88858SPedro F. Giffuni 	{ "next",	db_trace_until_matching_cmd,0,	NULL },
1207fb88858SPedro F. Giffuni 	{ "match",	db_trace_until_matching_cmd,0,	NULL },
1217fb88858SPedro F. Giffuni 	{ "trace",	db_stack_trace,		CS_OWN,	NULL },
1227fb88858SPedro F. Giffuni 	{ "t",		db_stack_trace,		CS_OWN,	NULL },
12339297ba4SSam Leffler 	/* XXX alias for all trace */
1247fb88858SPedro F. Giffuni 	{ "alltrace",	db_stack_trace_all,	0,	NULL },
1257fb88858SPedro F. Giffuni 	{ "where",	db_stack_trace,		CS_OWN,	NULL },
1267fb88858SPedro F. Giffuni 	{ "bt",		db_stack_trace,		CS_OWN,	NULL },
1277fb88858SPedro F. Giffuni 	{ "call",	db_fncall,		CS_OWN,	NULL },
128e1e31c0eSJohn Baldwin 	{ "show",	0,			0,	&db_show_table },
1297fb88858SPedro F. Giffuni 	{ "ps",		db_ps,			0,	NULL },
1307fb88858SPedro F. Giffuni 	{ "gdb",	db_gdb,			0,	NULL },
1317fb88858SPedro F. Giffuni 	{ "halt",	db_halt,		0,	NULL },
1327fb88858SPedro F. Giffuni 	{ "reboot",	db_reset,		0,	NULL },
1337fb88858SPedro F. Giffuni 	{ "reset",	db_reset,		0,	NULL },
1347fb88858SPedro F. Giffuni 	{ "kill",	db_kill,		CS_OWN,	NULL },
1357fb88858SPedro F. Giffuni 	{ "watchdog",	db_watchdog,		CS_OWN,	NULL },
1367fb88858SPedro F. Giffuni 	{ "thread",	db_set_thread,		CS_OWN,	NULL },
1377fb88858SPedro F. Giffuni 	{ "run",	db_run_cmd,		CS_OWN,	NULL },
1387fb88858SPedro F. Giffuni 	{ "script",	db_script_cmd,		CS_OWN,	NULL },
1397fb88858SPedro F. Giffuni 	{ "scripts",	db_scripts_cmd,		0,	NULL },
1407fb88858SPedro F. Giffuni 	{ "unscript",	db_unscript_cmd,	CS_OWN,	NULL },
1417fb88858SPedro F. Giffuni 	{ "capture",	db_capture_cmd,		CS_OWN,	NULL },
1427fb88858SPedro F. Giffuni 	{ "textdump",	db_textdump_cmd,	CS_OWN, NULL },
1437fb88858SPedro F. Giffuni 	{ "findstack",	db_findstack_cmd,	0,	NULL },
144cec9a4bfSDavid E. O'Brien };
14539297ba4SSam Leffler struct command_table db_cmd_table = LIST_HEAD_INITIALIZER(db_cmd_table);
146e1e31c0eSJohn Baldwin 
147*9f915a92SPedro F. Giffuni static struct command	*db_last_command = NULL;
1486337f4efSBruce Evans 
1495b81b6b3SRodney W. Grimes /*
1505b81b6b3SRodney W. Grimes  * if 'ed' style: 'dot' is set at start of last item printed,
1515b81b6b3SRodney W. Grimes  * and '+' points to next line.
1525b81b6b3SRodney W. Grimes  * Otherwise: 'dot' points to next item, '..' points to last.
1535b81b6b3SRodney W. Grimes  */
154cd508278SPedro F. Giffuni static bool	db_ed_style = true;
1555b81b6b3SRodney W. Grimes 
1565b81b6b3SRodney W. Grimes /*
1575b81b6b3SRodney W. Grimes  * Utility routine - discard tokens through end-of-line.
1585b81b6b3SRodney W. Grimes  */
1595b81b6b3SRodney W. Grimes void
160a41dd031SPedro F. Giffuni db_skip_to_eol(void)
1615b81b6b3SRodney W. Grimes {
1625b81b6b3SRodney W. Grimes 	int	t;
1635b81b6b3SRodney W. Grimes 	do {
1645b81b6b3SRodney W. Grimes 	    t = db_read_token();
1655b81b6b3SRodney W. Grimes 	} while (t != tEOL);
1665b81b6b3SRodney W. Grimes }
1675b81b6b3SRodney W. Grimes 
1685b81b6b3SRodney W. Grimes /*
1695b81b6b3SRodney W. Grimes  * Results of command search.
1705b81b6b3SRodney W. Grimes  */
1715b81b6b3SRodney W. Grimes #define	CMD_UNIQUE	0
1725b81b6b3SRodney W. Grimes #define	CMD_FOUND	1
1735b81b6b3SRodney W. Grimes #define	CMD_NONE	2
1745b81b6b3SRodney W. Grimes #define	CMD_AMBIGUOUS	3
1755b81b6b3SRodney W. Grimes #define	CMD_HELP	4
1765b81b6b3SRodney W. Grimes 
177e1e31c0eSJohn Baldwin static void	db_cmd_match(char *name, struct command *cmd,
178e1e31c0eSJohn Baldwin 		    struct command **cmdp, int *resultp);
179e1e31c0eSJohn Baldwin static void	db_cmd_list(struct command_table *table);
180e1e31c0eSJohn Baldwin static int	db_cmd_search(char *name, struct command_table *table,
181e1e31c0eSJohn Baldwin 		    struct command **cmdp);
18214e10f99SAlfred Perlstein static void	db_command(struct command **last_cmdp,
183c9b0cc3bSRobert Watson 		    struct command_table *cmd_table, int dopager);
184058284fcSBruce Evans 
1855b81b6b3SRodney W. Grimes /*
18639297ba4SSam Leffler  * Initialize the command lists from the static tables.
18739297ba4SSam Leffler  */
18893d4804bSJohn Baldwin void
18993d4804bSJohn Baldwin db_command_init(void)
19039297ba4SSam Leffler {
19139297ba4SSam Leffler #define	N(a)	(sizeof(a) / sizeof(a[0]))
19239297ba4SSam Leffler 	int i;
19339297ba4SSam Leffler 
19439297ba4SSam Leffler 	for (i = 0; i < N(db_cmds); i++)
19539297ba4SSam Leffler 		db_command_register(&db_cmd_table, &db_cmds[i]);
19639297ba4SSam Leffler 	for (i = 0; i < N(db_show_cmds); i++)
19739297ba4SSam Leffler 		db_command_register(&db_show_table, &db_show_cmds[i]);
19839297ba4SSam Leffler 	for (i = 0; i < N(db_show_all_cmds); i++)
19939297ba4SSam Leffler 		db_command_register(&db_show_all_table, &db_show_all_cmds[i]);
20039297ba4SSam Leffler #undef N
20139297ba4SSam Leffler }
20239297ba4SSam Leffler 
20339297ba4SSam Leffler /*
20439297ba4SSam Leffler  * Register a command.
20539297ba4SSam Leffler  */
20639297ba4SSam Leffler void
20739297ba4SSam Leffler db_command_register(struct command_table *list, struct command *cmd)
20839297ba4SSam Leffler {
20939297ba4SSam Leffler 	struct command *c, *last;
21039297ba4SSam Leffler 
21139297ba4SSam Leffler 	last = NULL;
21239297ba4SSam Leffler 	LIST_FOREACH(c, list, next) {
21339297ba4SSam Leffler 		int n = strcmp(cmd->name, c->name);
21439297ba4SSam Leffler 
21539297ba4SSam Leffler 		/* Check that the command is not already present. */
21639297ba4SSam Leffler 		if (n == 0) {
21739297ba4SSam Leffler 			printf("%s: Warning, the command \"%s\" already exists;"
21839297ba4SSam Leffler 			     " ignoring request\n", __func__, cmd->name);
21939297ba4SSam Leffler 			return;
22039297ba4SSam Leffler 		}
22139297ba4SSam Leffler 		if (n < 0) {
22239297ba4SSam Leffler 			/* NB: keep list sorted lexicographically */
22339297ba4SSam Leffler 			LIST_INSERT_BEFORE(c, cmd, next);
22439297ba4SSam Leffler 			return;
22539297ba4SSam Leffler 		}
22639297ba4SSam Leffler 		last = c;
22739297ba4SSam Leffler 	}
22839297ba4SSam Leffler 	if (last == NULL)
22939297ba4SSam Leffler 		LIST_INSERT_HEAD(list, cmd, next);
23039297ba4SSam Leffler 	else
23139297ba4SSam Leffler 		LIST_INSERT_AFTER(last, cmd, next);
23239297ba4SSam Leffler }
23339297ba4SSam Leffler 
23439297ba4SSam Leffler /*
23539297ba4SSam Leffler  * Remove a command previously registered with db_command_register.
23639297ba4SSam Leffler  */
23739297ba4SSam Leffler void
23839297ba4SSam Leffler db_command_unregister(struct command_table *list, struct command *cmd)
23939297ba4SSam Leffler {
24039297ba4SSam Leffler 	struct command *c;
24139297ba4SSam Leffler 
24239297ba4SSam Leffler 	LIST_FOREACH(c, list, next) {
24339297ba4SSam Leffler 		if (cmd == c) {
24439297ba4SSam Leffler 			LIST_REMOVE(cmd, next);
24539297ba4SSam Leffler 			return;
24639297ba4SSam Leffler 		}
24739297ba4SSam Leffler 	}
24839297ba4SSam Leffler 	/* NB: intentionally quiet */
24939297ba4SSam Leffler }
25039297ba4SSam Leffler 
25139297ba4SSam Leffler /*
252e1e31c0eSJohn Baldwin  * Helper function to match a single command.
2535b81b6b3SRodney W. Grimes  */
254e1e31c0eSJohn Baldwin static void
255a41dd031SPedro F. Giffuni db_cmd_match(char *name, struct command *cmd, struct command **cmdp,
256a41dd031SPedro F. Giffuni     int *resultp)
257e1e31c0eSJohn Baldwin {
258e1e31c0eSJohn Baldwin 	char *lp, *rp;
259e1e31c0eSJohn Baldwin 	int c;
2605b81b6b3SRodney W. Grimes 
2615b81b6b3SRodney W. Grimes 	lp = name;
2625b81b6b3SRodney W. Grimes 	rp = cmd->name;
2635b81b6b3SRodney W. Grimes 	while ((c = *lp) == *rp) {
2645b81b6b3SRodney W. Grimes 		if (c == 0) {
2655b81b6b3SRodney W. Grimes 			/* complete match */
2665b81b6b3SRodney W. Grimes 			*cmdp = cmd;
267e1e31c0eSJohn Baldwin 			*resultp = CMD_UNIQUE;
268e1e31c0eSJohn Baldwin 			return;
2695b81b6b3SRodney W. Grimes 		}
2705b81b6b3SRodney W. Grimes 		lp++;
2715b81b6b3SRodney W. Grimes 		rp++;
2725b81b6b3SRodney W. Grimes 	}
2735b81b6b3SRodney W. Grimes 	if (c == 0) {
2745b81b6b3SRodney W. Grimes 		/* end of name, not end of command -
2755b81b6b3SRodney W. Grimes 		   partial match */
276e1e31c0eSJohn Baldwin 		if (*resultp == CMD_FOUND) {
277e1e31c0eSJohn Baldwin 			*resultp = CMD_AMBIGUOUS;
2785b81b6b3SRodney W. Grimes 			/* but keep looking for a full match -
2795b81b6b3SRodney W. Grimes 			   this lets us match single letters */
280e1e31c0eSJohn Baldwin 		} else {
2815b81b6b3SRodney W. Grimes 			*cmdp = cmd;
282e1e31c0eSJohn Baldwin 			*resultp = CMD_FOUND;
2835b81b6b3SRodney W. Grimes 		}
2845b81b6b3SRodney W. Grimes 	}
2855b81b6b3SRodney W. Grimes }
2866337f4efSBruce Evans 
287e1e31c0eSJohn Baldwin /*
288e1e31c0eSJohn Baldwin  * Search for command prefix.
289e1e31c0eSJohn Baldwin  */
290e1e31c0eSJohn Baldwin static int
291a41dd031SPedro F. Giffuni db_cmd_search(char *name, struct command_table *table, struct command **cmdp)
292e1e31c0eSJohn Baldwin {
293e1e31c0eSJohn Baldwin 	struct command	*cmd;
294e1e31c0eSJohn Baldwin 	int		result = CMD_NONE;
295e1e31c0eSJohn Baldwin 
29639297ba4SSam Leffler 	LIST_FOREACH(cmd, table, next) {
297e1e31c0eSJohn Baldwin 		db_cmd_match(name,cmd,cmdp,&result);
298e1e31c0eSJohn Baldwin 		if (result == CMD_UNIQUE)
29939297ba4SSam Leffler 			break;
3006337f4efSBruce Evans 	}
30139297ba4SSam Leffler 
3025b81b6b3SRodney W. Grimes 	if (result == CMD_NONE) {
3035b81b6b3SRodney W. Grimes 		/* check for 'help' */
3045b81b6b3SRodney W. Grimes 		if (name[0] == 'h' && name[1] == 'e'
3055b81b6b3SRodney W. Grimes 		    && name[2] == 'l' && name[3] == 'p')
3065b81b6b3SRodney W. Grimes 			result = CMD_HELP;
3075b81b6b3SRodney W. Grimes 	}
3085b81b6b3SRodney W. Grimes 	return (result);
3095b81b6b3SRodney W. Grimes }
3105b81b6b3SRodney W. Grimes 
311f73a856dSPoul-Henning Kamp static void
312a41dd031SPedro F. Giffuni db_cmd_list(struct command_table *table)
3135b81b6b3SRodney W. Grimes {
3140a95ab74SPedro F. Giffuni 	struct command	*cmd;
3155b81b6b3SRodney W. Grimes 
31639297ba4SSam Leffler 	LIST_FOREACH(cmd, table, next) {
317527be4f2SJohn-Mark Gurney 		db_printf("%-16s", cmd->name);
318527be4f2SJohn-Mark Gurney 		db_end_line(16);
3195b81b6b3SRodney W. Grimes 	}
3205b81b6b3SRodney W. Grimes }
3215b81b6b3SRodney W. Grimes 
322f73a856dSPoul-Henning Kamp static void
323a41dd031SPedro F. Giffuni db_command(struct command **last_cmdp, struct command_table *cmd_table,
324a41dd031SPedro F. Giffuni     int dopager)
3255b81b6b3SRodney W. Grimes {
32639297ba4SSam Leffler 	struct command	*cmd = NULL;
3275b81b6b3SRodney W. Grimes 	int		t;
3285b81b6b3SRodney W. Grimes 	char		modif[TOK_STRING_SIZE];
3295b81b6b3SRodney W. Grimes 	db_expr_t	addr, count;
330cd508278SPedro F. Giffuni 	bool		have_addr = false;
3315b81b6b3SRodney W. Grimes 	int		result;
3325b81b6b3SRodney W. Grimes 
3335b81b6b3SRodney W. Grimes 	t = db_read_token();
3345b81b6b3SRodney W. Grimes 	if (t == tEOL) {
3355b81b6b3SRodney W. Grimes 	    /* empty line repeats last command, at 'next' */
3365b81b6b3SRodney W. Grimes 	    cmd = *last_cmdp;
3375b81b6b3SRodney W. Grimes 	    addr = (db_expr_t)db_next;
3382b490bc7SPedro F. Giffuni 	    have_addr = false;
3395b81b6b3SRodney W. Grimes 	    count = 1;
3405b81b6b3SRodney W. Grimes 	    modif[0] = '\0';
3415b81b6b3SRodney W. Grimes 	}
3425b81b6b3SRodney W. Grimes 	else if (t == tEXCL) {
343cd508278SPedro F. Giffuni 	    db_fncall((db_expr_t)0, (bool)false, (db_expr_t)0, (char *)0);
3445b81b6b3SRodney W. Grimes 	    return;
3455b81b6b3SRodney W. Grimes 	}
3465b81b6b3SRodney W. Grimes 	else if (t != tIDENT) {
3475b81b6b3SRodney W. Grimes 	    db_printf("?\n");
3485b81b6b3SRodney W. Grimes 	    db_flush_lex();
3495b81b6b3SRodney W. Grimes 	    return;
3505b81b6b3SRodney W. Grimes 	}
3515b81b6b3SRodney W. Grimes 	else {
3525b81b6b3SRodney W. Grimes 	    /*
3535b81b6b3SRodney W. Grimes 	     * Search for command
3545b81b6b3SRodney W. Grimes 	     */
3555b81b6b3SRodney W. Grimes 	    while (cmd_table) {
3565b81b6b3SRodney W. Grimes 		result = db_cmd_search(db_tok_string,
3575b81b6b3SRodney W. Grimes 				       cmd_table,
3585b81b6b3SRodney W. Grimes 				       &cmd);
3595b81b6b3SRodney W. Grimes 		switch (result) {
3605b81b6b3SRodney W. Grimes 		    case CMD_NONE:
3615b81b6b3SRodney W. Grimes 			db_printf("No such command\n");
3625b81b6b3SRodney W. Grimes 			db_flush_lex();
3635b81b6b3SRodney W. Grimes 			return;
3645b81b6b3SRodney W. Grimes 		    case CMD_AMBIGUOUS:
3655b81b6b3SRodney W. Grimes 			db_printf("Ambiguous\n");
3665b81b6b3SRodney W. Grimes 			db_flush_lex();
3675b81b6b3SRodney W. Grimes 			return;
3685b81b6b3SRodney W. Grimes 		    case CMD_HELP:
369e1e31c0eSJohn Baldwin 			db_cmd_list(cmd_table);
3705b81b6b3SRodney W. Grimes 			db_flush_lex();
3715b81b6b3SRodney W. Grimes 			return;
3725b81b6b3SRodney W. Grimes 		    default:
3735b81b6b3SRodney W. Grimes 			break;
3745b81b6b3SRodney W. Grimes 		}
375e1e31c0eSJohn Baldwin 		if ((cmd_table = cmd->more) != NULL) {
3765b81b6b3SRodney W. Grimes 		    t = db_read_token();
3775b81b6b3SRodney W. Grimes 		    if (t != tIDENT) {
378e1e31c0eSJohn Baldwin 			db_cmd_list(cmd_table);
3795b81b6b3SRodney W. Grimes 			db_flush_lex();
3805b81b6b3SRodney W. Grimes 			return;
3815b81b6b3SRodney W. Grimes 		    }
3825b81b6b3SRodney W. Grimes 		}
3835b81b6b3SRodney W. Grimes 	    }
3845b81b6b3SRodney W. Grimes 
3855b81b6b3SRodney W. Grimes 	    if ((cmd->flag & CS_OWN) == 0) {
3865b81b6b3SRodney W. Grimes 		/*
3875b81b6b3SRodney W. Grimes 		 * Standard syntax:
3885b81b6b3SRodney W. Grimes 		 * command [/modifier] [addr] [,count]
3895b81b6b3SRodney W. Grimes 		 */
3905b81b6b3SRodney W. Grimes 		t = db_read_token();
3915b81b6b3SRodney W. Grimes 		if (t == tSLASH) {
3925b81b6b3SRodney W. Grimes 		    t = db_read_token();
3935b81b6b3SRodney W. Grimes 		    if (t != tIDENT) {
3945b81b6b3SRodney W. Grimes 			db_printf("Bad modifier\n");
3955b81b6b3SRodney W. Grimes 			db_flush_lex();
3965b81b6b3SRodney W. Grimes 			return;
3975b81b6b3SRodney W. Grimes 		    }
3985b81b6b3SRodney W. Grimes 		    db_strcpy(modif, db_tok_string);
3995b81b6b3SRodney W. Grimes 		}
4005b81b6b3SRodney W. Grimes 		else {
4015b81b6b3SRodney W. Grimes 		    db_unread_token(t);
4025b81b6b3SRodney W. Grimes 		    modif[0] = '\0';
4035b81b6b3SRodney W. Grimes 		}
4045b81b6b3SRodney W. Grimes 
4055b81b6b3SRodney W. Grimes 		if (db_expression(&addr)) {
4065b81b6b3SRodney W. Grimes 		    db_dot = (db_addr_t) addr;
4075b81b6b3SRodney W. Grimes 		    db_last_addr = db_dot;
4082b490bc7SPedro F. Giffuni 		    have_addr = true;
4095b81b6b3SRodney W. Grimes 		}
4105b81b6b3SRodney W. Grimes 		else {
4115b81b6b3SRodney W. Grimes 		    addr = (db_expr_t) db_dot;
4122b490bc7SPedro F. Giffuni 		    have_addr = false;
4135b81b6b3SRodney W. Grimes 		}
4145b81b6b3SRodney W. Grimes 		t = db_read_token();
4155b81b6b3SRodney W. Grimes 		if (t == tCOMMA) {
4165b81b6b3SRodney W. Grimes 		    if (!db_expression(&count)) {
4175b81b6b3SRodney W. Grimes 			db_printf("Count missing\n");
4185b81b6b3SRodney W. Grimes 			db_flush_lex();
4195b81b6b3SRodney W. Grimes 			return;
4205b81b6b3SRodney W. Grimes 		    }
4215b81b6b3SRodney W. Grimes 		}
4225b81b6b3SRodney W. Grimes 		else {
4235b81b6b3SRodney W. Grimes 		    db_unread_token(t);
4245b81b6b3SRodney W. Grimes 		    count = -1;
4255b81b6b3SRodney W. Grimes 		}
4265b81b6b3SRodney W. Grimes 		if ((cmd->flag & CS_MORE) == 0) {
4275b81b6b3SRodney W. Grimes 		    db_skip_to_eol();
4285b81b6b3SRodney W. Grimes 		}
4295b81b6b3SRodney W. Grimes 	    }
4305b81b6b3SRodney W. Grimes 	}
4315b81b6b3SRodney W. Grimes 	*last_cmdp = cmd;
432*9f915a92SPedro F. Giffuni 	if (cmd != NULL) {
4335b81b6b3SRodney W. Grimes 	    /*
4345b81b6b3SRodney W. Grimes 	     * Execute the command.
4355b81b6b3SRodney W. Grimes 	     */
436c9b0cc3bSRobert Watson 	    if (dopager)
43719e9205aSJohn Baldwin 		db_enable_pager();
438c9b0cc3bSRobert Watson 	    else
439c9b0cc3bSRobert Watson 		db_disable_pager();
4405b81b6b3SRodney W. Grimes 	    (*cmd->fcn)(addr, have_addr, count, modif);
441c9b0cc3bSRobert Watson 	    if (dopager)
44219e9205aSJohn Baldwin 		db_disable_pager();
4435b81b6b3SRodney W. Grimes 
4445b81b6b3SRodney W. Grimes 	    if (cmd->flag & CS_SET_DOT) {
4455b81b6b3SRodney W. Grimes 		/*
4465b81b6b3SRodney W. Grimes 		 * If command changes dot, set dot to
4475b81b6b3SRodney W. Grimes 		 * previous address displayed (if 'ed' style).
4485b81b6b3SRodney W. Grimes 		 */
4495b81b6b3SRodney W. Grimes 		if (db_ed_style) {
4505b81b6b3SRodney W. Grimes 		    db_dot = db_prev;
4515b81b6b3SRodney W. Grimes 		}
4525b81b6b3SRodney W. Grimes 		else {
4535b81b6b3SRodney W. Grimes 		    db_dot = db_next;
4545b81b6b3SRodney W. Grimes 		}
4555b81b6b3SRodney W. Grimes 	    }
4565b81b6b3SRodney W. Grimes 	    else {
4575b81b6b3SRodney W. Grimes 		/*
4585b81b6b3SRodney W. Grimes 		 * If command does not change dot,
4595b81b6b3SRodney W. Grimes 		 * set 'next' location to be the same.
4605b81b6b3SRodney W. Grimes 		 */
4615b81b6b3SRodney W. Grimes 		db_next = db_dot;
4625b81b6b3SRodney W. Grimes 	    }
4635b81b6b3SRodney W. Grimes 	}
4645b81b6b3SRodney W. Grimes }
4655b81b6b3SRodney W. Grimes 
4665b81b6b3SRodney W. Grimes /*
467b7aa38c1SBruce Evans  * At least one non-optional command must be implemented using
468b7aa38c1SBruce Evans  * DB_COMMAND() so that db_cmd_set gets created.  Here is one.
469b7aa38c1SBruce Evans  */
470b7aa38c1SBruce Evans DB_COMMAND(panic, db_panic)
4713eac4884SPoul-Henning Kamp {
47215cc91d3SJohn Baldwin 	db_disable_pager();
473edf8a815SDavid Greenman 	panic("from debugger");
4743eac4884SPoul-Henning Kamp }
4753eac4884SPoul-Henning Kamp 
4763eac4884SPoul-Henning Kamp void
477a41dd031SPedro F. Giffuni db_command_loop(void)
4785b81b6b3SRodney W. Grimes {
4795b81b6b3SRodney W. Grimes 	/*
4805b81b6b3SRodney W. Grimes 	 * Initialize 'prev' and 'next' to dot.
4815b81b6b3SRodney W. Grimes 	 */
4825b81b6b3SRodney W. Grimes 	db_prev = db_dot;
4835b81b6b3SRodney W. Grimes 	db_next = db_dot;
4845b81b6b3SRodney W. Grimes 
4855b81b6b3SRodney W. Grimes 	db_cmd_loop_done = 0;
4865b81b6b3SRodney W. Grimes 	while (!db_cmd_loop_done) {
4875b81b6b3SRodney W. Grimes 	    if (db_print_position() != 0)
4885b81b6b3SRodney W. Grimes 		db_printf("\n");
4895b81b6b3SRodney W. Grimes 
4905b81b6b3SRodney W. Grimes 	    db_printf("db> ");
4915b81b6b3SRodney W. Grimes 	    (void) db_read_line();
4925b81b6b3SRodney W. Grimes 
49339297ba4SSam Leffler 	    db_command(&db_last_command, &db_cmd_table, /* dopager */ 1);
4945b81b6b3SRodney W. Grimes 	}
4955b81b6b3SRodney W. Grimes }
4965b81b6b3SRodney W. Grimes 
497c9b0cc3bSRobert Watson /*
498c9b0cc3bSRobert Watson  * Execute a command on behalf of a script.  The caller is responsible for
499c9b0cc3bSRobert Watson  * making sure that the command string is < DB_MAXLINE or it will be
500c9b0cc3bSRobert Watson  * truncated.
501c9b0cc3bSRobert Watson  *
502c9b0cc3bSRobert Watson  * XXXRW: Runs by injecting faked input into DDB input stream; it would be
503c9b0cc3bSRobert Watson  * nicer to use an alternative approach that didn't mess with the previous
504c9b0cc3bSRobert Watson  * command buffer.
505c9b0cc3bSRobert Watson  */
506c9b0cc3bSRobert Watson void
507c9b0cc3bSRobert Watson db_command_script(const char *command)
508c9b0cc3bSRobert Watson {
509c9b0cc3bSRobert Watson 	db_prev = db_next = db_dot;
510c9b0cc3bSRobert Watson 	db_inject_line(command);
51139297ba4SSam Leffler 	db_command(&db_last_command, &db_cmd_table, /* dopager */ 0);
512c9b0cc3bSRobert Watson }
513c9b0cc3bSRobert Watson 
5145b81b6b3SRodney W. Grimes void
515a41dd031SPedro F. Giffuni db_error(const char *s)
5165b81b6b3SRodney W. Grimes {
5175b81b6b3SRodney W. Grimes 	if (s)
51858d9a059SKris Kennaway 	    db_printf("%s", s);
5195b81b6b3SRodney W. Grimes 	db_flush_lex();
52037224cd3SMarcel Moolenaar 	kdb_reenter();
5215b81b6b3SRodney W. Grimes }
5225b81b6b3SRodney W. Grimes 
523299cceefSMarcel Moolenaar static void
524cd508278SPedro F. Giffuni db_dump(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4)
525299cceefSMarcel Moolenaar {
526299cceefSMarcel Moolenaar 	int error;
527299cceefSMarcel Moolenaar 
52821d748a9SAlfred Perlstein 	if (textdump_pending) {
52921d748a9SAlfred Perlstein 		db_printf("textdump_pending set.\n"
53021d748a9SAlfred Perlstein 		    "run \"textdump unset\" first or \"textdump dump\" for a textdump.\n");
53121d748a9SAlfred Perlstein 		return;
53221d748a9SAlfred Perlstein 	}
5332b490bc7SPedro F. Giffuni 	error = doadump(false);
534299cceefSMarcel Moolenaar 	if (error) {
535299cceefSMarcel Moolenaar 		db_printf("Cannot dump: ");
536299cceefSMarcel Moolenaar 		switch (error) {
537299cceefSMarcel Moolenaar 		case EBUSY:
538299cceefSMarcel Moolenaar 			db_printf("debugger got invoked while dumping.\n");
539299cceefSMarcel Moolenaar 			break;
540299cceefSMarcel Moolenaar 		case ENXIO:
541299cceefSMarcel Moolenaar 			db_printf("no dump device specified.\n");
542299cceefSMarcel Moolenaar 			break;
543299cceefSMarcel Moolenaar 		default:
544299cceefSMarcel Moolenaar 			db_printf("unknown error (error=%d).\n", error);
545299cceefSMarcel Moolenaar 			break;
546299cceefSMarcel Moolenaar 		}
547299cceefSMarcel Moolenaar 	}
548299cceefSMarcel Moolenaar }
5495b81b6b3SRodney W. Grimes 
5505b81b6b3SRodney W. Grimes /*
5515b81b6b3SRodney W. Grimes  * Call random function:
5525b81b6b3SRodney W. Grimes  * !expr(arg,arg,arg)
5535b81b6b3SRodney W. Grimes  */
554a2aeb24eSMarcel Moolenaar 
555a2aeb24eSMarcel Moolenaar /* The generic implementation supports a maximum of 10 arguments. */
556a2aeb24eSMarcel Moolenaar typedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t,
557a2aeb24eSMarcel Moolenaar     db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t);
558a2aeb24eSMarcel Moolenaar 
559a2aeb24eSMarcel Moolenaar static __inline int
560a2aeb24eSMarcel Moolenaar db_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[])
561a2aeb24eSMarcel Moolenaar {
562a2aeb24eSMarcel Moolenaar 	__db_f *f = (__db_f *)addr;
563a2aeb24eSMarcel Moolenaar 
564a2aeb24eSMarcel Moolenaar 	if (nargs > 10) {
565a2aeb24eSMarcel Moolenaar 		db_printf("Too many arguments (max 10)\n");
566a2aeb24eSMarcel Moolenaar 		return (0);
567a2aeb24eSMarcel Moolenaar 	}
568a2aeb24eSMarcel Moolenaar 	*rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5],
569a2aeb24eSMarcel Moolenaar 	    args[6], args[7], args[8], args[9]);
570a2aeb24eSMarcel Moolenaar 	return (1);
571a2aeb24eSMarcel Moolenaar }
572a2aeb24eSMarcel Moolenaar 
573f73a856dSPoul-Henning Kamp static void
574cd508278SPedro F. Giffuni db_fncall(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
5755b81b6b3SRodney W. Grimes {
5765b81b6b3SRodney W. Grimes 	db_expr_t	fn_addr;
577a2aeb24eSMarcel Moolenaar 	db_expr_t	args[DB_MAXARGS];
5785b81b6b3SRodney W. Grimes 	int		nargs = 0;
5795b81b6b3SRodney W. Grimes 	db_expr_t	retval;
5805b81b6b3SRodney W. Grimes 	int		t;
5815b81b6b3SRodney W. Grimes 
5825b81b6b3SRodney W. Grimes 	if (!db_expression(&fn_addr)) {
5835b81b6b3SRodney W. Grimes 	    db_printf("Bad function\n");
5845b81b6b3SRodney W. Grimes 	    db_flush_lex();
5855b81b6b3SRodney W. Grimes 	    return;
5865b81b6b3SRodney W. Grimes 	}
5875b81b6b3SRodney W. Grimes 
5885b81b6b3SRodney W. Grimes 	t = db_read_token();
5895b81b6b3SRodney W. Grimes 	if (t == tLPAREN) {
5905b81b6b3SRodney W. Grimes 	    if (db_expression(&args[0])) {
5915b81b6b3SRodney W. Grimes 		nargs++;
5925b81b6b3SRodney W. Grimes 		while ((t = db_read_token()) == tCOMMA) {
593a2aeb24eSMarcel Moolenaar 		    if (nargs == DB_MAXARGS) {
594a2aeb24eSMarcel Moolenaar 			db_printf("Too many arguments (max %d)\n", DB_MAXARGS);
5955b81b6b3SRodney W. Grimes 			db_flush_lex();
5965b81b6b3SRodney W. Grimes 			return;
5975b81b6b3SRodney W. Grimes 		    }
5985b81b6b3SRodney W. Grimes 		    if (!db_expression(&args[nargs])) {
5995b81b6b3SRodney W. Grimes 			db_printf("Argument missing\n");
6005b81b6b3SRodney W. Grimes 			db_flush_lex();
6015b81b6b3SRodney W. Grimes 			return;
6025b81b6b3SRodney W. Grimes 		    }
6035b81b6b3SRodney W. Grimes 		    nargs++;
6045b81b6b3SRodney W. Grimes 		}
6055b81b6b3SRodney W. Grimes 		db_unread_token(t);
6065b81b6b3SRodney W. Grimes 	    }
6075b81b6b3SRodney W. Grimes 	    if (db_read_token() != tRPAREN) {
6085b81b6b3SRodney W. Grimes 		db_printf("?\n");
6095b81b6b3SRodney W. Grimes 		db_flush_lex();
6105b81b6b3SRodney W. Grimes 		return;
6115b81b6b3SRodney W. Grimes 	    }
6125b81b6b3SRodney W. Grimes 	}
6135b81b6b3SRodney W. Grimes 	db_skip_to_eol();
61415cc91d3SJohn Baldwin 	db_disable_pager();
6155b81b6b3SRodney W. Grimes 
616a2aeb24eSMarcel Moolenaar 	if (DB_CALL(fn_addr, &retval, nargs, args))
617a2aeb24eSMarcel Moolenaar 		db_printf("= %#lr\n", (long)retval);
6185b81b6b3SRodney W. Grimes }
619ad146781SPaul Traina 
6205370c3b6SPeter Wemm static void
621cd508278SPedro F. Giffuni db_halt(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4)
622e4b732cfSBruce Evans {
623e4b732cfSBruce Evans 
624e4b732cfSBruce Evans 	cpu_halt();
625e4b732cfSBruce Evans }
626e4b732cfSBruce Evans 
627e4b732cfSBruce Evans static void
628cd508278SPedro F. Giffuni db_kill(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
62919d2c78fSDima Dorfman {
63019d2c78fSDima Dorfman 	db_expr_t old_radix, pid, sig;
63119d2c78fSDima Dorfman 	struct proc *p;
63219d2c78fSDima Dorfman 
63319d2c78fSDima Dorfman #define	DB_ERROR(f)	do { db_printf f; db_flush_lex(); goto out; } while (0)
63419d2c78fSDima Dorfman 
63519d2c78fSDima Dorfman 	/*
63619d2c78fSDima Dorfman 	 * PIDs and signal numbers are typically represented in base
63719d2c78fSDima Dorfman 	 * 10, so make that the default here.  It can, of course, be
63819d2c78fSDima Dorfman 	 * overridden by specifying a prefix.
63919d2c78fSDima Dorfman 	 */
64019d2c78fSDima Dorfman 	old_radix = db_radix;
64119d2c78fSDima Dorfman 	db_radix = 10;
64219d2c78fSDima Dorfman 	/* Retrieve arguments. */
64319d2c78fSDima Dorfman 	if (!db_expression(&sig))
64419d2c78fSDima Dorfman 		DB_ERROR(("Missing signal number\n"));
64519d2c78fSDima Dorfman 	if (!db_expression(&pid))
64619d2c78fSDima Dorfman 		DB_ERROR(("Missing process ID\n"));
64719d2c78fSDima Dorfman 	db_skip_to_eol();
648a29af74bSKonstantin Belousov 	if (!_SIG_VALID(sig))
64919d2c78fSDima Dorfman 		DB_ERROR(("Signal number out of range\n"));
65019d2c78fSDima Dorfman 
65119d2c78fSDima Dorfman 	/*
65219d2c78fSDima Dorfman 	 * Find the process in question.  allproc_lock is not needed
65319d2c78fSDima Dorfman 	 * since we're in DDB.
65419d2c78fSDima Dorfman 	 */
65519d2c78fSDima Dorfman 	/* sx_slock(&allproc_lock); */
656f67af5c9SXin LI 	FOREACH_PROC_IN_SYSTEM(p)
65719d2c78fSDima Dorfman 	    if (p->p_pid == pid)
65819d2c78fSDima Dorfman 		    break;
65919d2c78fSDima Dorfman 	/* sx_sunlock(&allproc_lock); */
66019d2c78fSDima Dorfman 	if (p == NULL)
661e30e3e9eSMatt Jacob 		DB_ERROR(("Can't find process with pid %ld\n", (long) pid));
66219d2c78fSDima Dorfman 
66319d2c78fSDima Dorfman 	/* If it's already locked, bail; otherwise, do the deed. */
66419d2c78fSDima Dorfman 	if (PROC_TRYLOCK(p) == 0)
665e30e3e9eSMatt Jacob 		DB_ERROR(("Can't lock process with pid %ld\n", (long) pid));
66619d2c78fSDima Dorfman 	else {
667a3de221dSKonstantin Belousov 		pksignal(p, sig, NULL);
66819d2c78fSDima Dorfman 		PROC_UNLOCK(p);
66919d2c78fSDima Dorfman 	}
67019d2c78fSDima Dorfman 
67119d2c78fSDima Dorfman out:
67219d2c78fSDima Dorfman 	db_radix = old_radix;
67319d2c78fSDima Dorfman #undef DB_ERROR
67419d2c78fSDima Dorfman }
67519d2c78fSDima Dorfman 
6760f59fbc3SBjoern A. Zeeb /*
6770f59fbc3SBjoern A. Zeeb  * Reboot.  In case there is an additional argument, take it as delay in
6780f59fbc3SBjoern A. Zeeb  * seconds.  Default to 15s if we cannot parse it and make sure we will
6790f59fbc3SBjoern A. Zeeb  * never wait longer than 1 week.  Some code is similar to
6800f59fbc3SBjoern A. Zeeb  * kern_shutdown.c:shutdown_panic().
6810f59fbc3SBjoern A. Zeeb  */
6820f59fbc3SBjoern A. Zeeb #ifndef	DB_RESET_MAXDELAY
6830f59fbc3SBjoern A. Zeeb #define	DB_RESET_MAXDELAY	(3600 * 24 * 7)
6840f59fbc3SBjoern A. Zeeb #endif
6850f59fbc3SBjoern A. Zeeb 
68619d2c78fSDima Dorfman static void
687cd508278SPedro F. Giffuni db_reset(db_expr_t addr, bool have_addr, db_expr_t count __unused,
6880f59fbc3SBjoern A. Zeeb     char *modif __unused)
6895370c3b6SPeter Wemm {
6900f59fbc3SBjoern A. Zeeb 	int delay, loop;
6910f59fbc3SBjoern A. Zeeb 
6920f59fbc3SBjoern A. Zeeb 	if (have_addr) {
6930f59fbc3SBjoern A. Zeeb 		delay = (int)db_hex2dec(addr);
6940f59fbc3SBjoern A. Zeeb 
6950f59fbc3SBjoern A. Zeeb 		/* If we parse to fail, use 15s. */
6960f59fbc3SBjoern A. Zeeb 		if (delay == -1)
6970f59fbc3SBjoern A. Zeeb 			delay = 15;
6980f59fbc3SBjoern A. Zeeb 
6990f59fbc3SBjoern A. Zeeb 		/* Cap at one week. */
7000f59fbc3SBjoern A. Zeeb 		if ((uintmax_t)delay > (uintmax_t)DB_RESET_MAXDELAY)
7010f59fbc3SBjoern A. Zeeb 			delay = DB_RESET_MAXDELAY;
7020f59fbc3SBjoern A. Zeeb 
7030f59fbc3SBjoern A. Zeeb 		db_printf("Automatic reboot in %d seconds - "
7040f59fbc3SBjoern A. Zeeb 		    "press a key on the console to abort\n", delay);
7050f59fbc3SBjoern A. Zeeb 		for (loop = delay * 10; loop > 0; --loop) {
7060f59fbc3SBjoern A. Zeeb 			DELAY(1000 * 100); /* 1/10th second */
7070f59fbc3SBjoern A. Zeeb 			/* Did user type a key? */
7080f59fbc3SBjoern A. Zeeb 			if (cncheckc() != -1)
7090f59fbc3SBjoern A. Zeeb 				return;
7100f59fbc3SBjoern A. Zeeb 		}
7110f59fbc3SBjoern A. Zeeb 	}
7125370c3b6SPeter Wemm 
7135370c3b6SPeter Wemm 	cpu_reset();
7145370c3b6SPeter Wemm }
71574cc032bSPoul-Henning Kamp 
71674cc032bSPoul-Henning Kamp static void
717cd508278SPedro F. Giffuni db_watchdog(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
71874cc032bSPoul-Henning Kamp {
7198b927d7bSAttilio Rao 	db_expr_t old_radix, tout;
7208b927d7bSAttilio Rao 	int err, i;
7218b927d7bSAttilio Rao 
7228b927d7bSAttilio Rao 	old_radix = db_radix;
7238b927d7bSAttilio Rao 	db_radix = 10;
7248b927d7bSAttilio Rao 	err = db_expression(&tout);
7258b927d7bSAttilio Rao 	db_skip_to_eol();
7268b927d7bSAttilio Rao 	db_radix = old_radix;
7278b927d7bSAttilio Rao 
7288b927d7bSAttilio Rao 	/* If no argument is provided the watchdog will just be disabled. */
7298b927d7bSAttilio Rao 	if (err == 0) {
7308b927d7bSAttilio Rao 		db_printf("No argument provided, disabling watchdog\n");
7318b927d7bSAttilio Rao 		tout = 0;
7328b927d7bSAttilio Rao 	} else if ((tout & WD_INTERVAL) == WD_TO_NEVER) {
7338b927d7bSAttilio Rao 		db_error("Out of range watchdog interval\n");
7348b927d7bSAttilio Rao 		return;
7358b927d7bSAttilio Rao 	}
7368b927d7bSAttilio Rao 	EVENTHANDLER_INVOKE(watchdog_list, tout, &i);
73774cc032bSPoul-Henning Kamp }
738f3be7cb3SMarcel Moolenaar 
739f3be7cb3SMarcel Moolenaar static void
740cd508278SPedro F. Giffuni db_gdb(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
741f3be7cb3SMarcel Moolenaar {
742f3be7cb3SMarcel Moolenaar 
7433a5d3671SMatthew D Fleming 	if (kdb_dbbe_select("gdb") != 0) {
744f3be7cb3SMarcel Moolenaar 		db_printf("The remote GDB backend could not be selected.\n");
7453a5d3671SMatthew D Fleming 		return;
7463a5d3671SMatthew D Fleming 	}
7473a5d3671SMatthew D Fleming 	/*
7483a5d3671SMatthew D Fleming 	 * Mark that we are done in the debugger.  kdb_trap()
7493a5d3671SMatthew D Fleming 	 * should re-enter with the new backend.
7503a5d3671SMatthew D Fleming 	 */
7513a5d3671SMatthew D Fleming 	db_cmd_loop_done = 1;
7523a5d3671SMatthew D Fleming 	db_printf("(ctrl-c will return control to ddb)\n");
753f3be7cb3SMarcel Moolenaar }
754fd32d93bSMarcel Moolenaar 
755fd32d93bSMarcel Moolenaar static void
756cd508278SPedro F. Giffuni db_stack_trace(db_expr_t tid, bool hastid, db_expr_t count, char *modif)
757fd32d93bSMarcel Moolenaar {
758fd32d93bSMarcel Moolenaar 	struct thread *td;
759fd32d93bSMarcel Moolenaar 	db_expr_t radix;
760a13aca1aSRobert Watson 	pid_t pid;
761fd32d93bSMarcel Moolenaar 	int t;
762fd32d93bSMarcel Moolenaar 
763fd32d93bSMarcel Moolenaar 	/*
764fd32d93bSMarcel Moolenaar 	 * We parse our own arguments. We don't like the default radix.
765fd32d93bSMarcel Moolenaar 	 */
766fd32d93bSMarcel Moolenaar 	radix = db_radix;
767fd32d93bSMarcel Moolenaar 	db_radix = 10;
768fd32d93bSMarcel Moolenaar 	hastid = db_expression(&tid);
769fd32d93bSMarcel Moolenaar 	t = db_read_token();
770fd32d93bSMarcel Moolenaar 	if (t == tCOMMA) {
771fd32d93bSMarcel Moolenaar 		if (!db_expression(&count)) {
772fd32d93bSMarcel Moolenaar 			db_printf("Count missing\n");
773fd32d93bSMarcel Moolenaar 			db_flush_lex();
774fd32d93bSMarcel Moolenaar 			return;
775fd32d93bSMarcel Moolenaar 		}
776fd32d93bSMarcel Moolenaar 	} else {
777fd32d93bSMarcel Moolenaar 		db_unread_token(t);
778fd32d93bSMarcel Moolenaar 		count = -1;
779fd32d93bSMarcel Moolenaar 	}
780fd32d93bSMarcel Moolenaar 	db_skip_to_eol();
781fd32d93bSMarcel Moolenaar 	db_radix = radix;
782fd32d93bSMarcel Moolenaar 
783fd32d93bSMarcel Moolenaar 	if (hastid) {
784fd32d93bSMarcel Moolenaar 		td = kdb_thr_lookup((lwpid_t)tid);
785fd32d93bSMarcel Moolenaar 		if (td == NULL)
786fd32d93bSMarcel Moolenaar 			td = kdb_thr_from_pid((pid_t)tid);
787fd32d93bSMarcel Moolenaar 		if (td == NULL) {
788fd32d93bSMarcel Moolenaar 			db_printf("Thread %d not found\n", (int)tid);
789fd32d93bSMarcel Moolenaar 			return;
790fd32d93bSMarcel Moolenaar 		}
791fd32d93bSMarcel Moolenaar 	} else
792fd32d93bSMarcel Moolenaar 		td = kdb_thread;
793a13aca1aSRobert Watson 	if (td->td_proc != NULL)
794a13aca1aSRobert Watson 		pid = td->td_proc->p_pid;
795a13aca1aSRobert Watson 	else
796a13aca1aSRobert Watson 		pid = -1;
797a13aca1aSRobert Watson 	db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td);
798fd32d93bSMarcel Moolenaar 	db_trace_thread(td, count);
799fd32d93bSMarcel Moolenaar }
800a7ad956bSRobert Watson 
801a7ad956bSRobert Watson static void
802cd508278SPedro F. Giffuni db_stack_trace_all(db_expr_t dummy, bool dummy2, db_expr_t dummy3,
803a7ad956bSRobert Watson     char *dummy4)
804a7ad956bSRobert Watson {
805a7ad956bSRobert Watson 	struct proc *p;
806a7ad956bSRobert Watson 	struct thread *td;
8079641e389SKonstantin Belousov 	jmp_buf jb;
8089641e389SKonstantin Belousov 	void *prev_jb;
809a7ad956bSRobert Watson 
810f67af5c9SXin LI 	FOREACH_PROC_IN_SYSTEM(p) {
8119641e389SKonstantin Belousov 		prev_jb = kdb_jmpbuf(jb);
8129641e389SKonstantin Belousov 		if (setjmp(jb) == 0) {
813a7ad956bSRobert Watson 			FOREACH_THREAD_IN_PROC(p, td) {
814a7ad956bSRobert Watson 				db_printf("\nTracing command %s pid %d tid %ld td %p\n",
815a7ad956bSRobert Watson 					  p->p_comm, p->p_pid, (long)td->td_tid, td);
816a7ad956bSRobert Watson 				db_trace_thread(td, -1);
8179641e389SKonstantin Belousov 				if (db_pager_quit) {
8189641e389SKonstantin Belousov 					kdb_jmpbuf(prev_jb);
819da927f93SOlivier Houchard 					return;
820a7ad956bSRobert Watson 				}
821a7ad956bSRobert Watson 			}
822a7ad956bSRobert Watson 		}
8239641e389SKonstantin Belousov 		kdb_jmpbuf(prev_jb);
8249641e389SKonstantin Belousov 	}
8259641e389SKonstantin Belousov }
8260f59fbc3SBjoern A. Zeeb 
8270f59fbc3SBjoern A. Zeeb /*
8280f59fbc3SBjoern A. Zeeb  * Take the parsed expression value from the command line that was parsed
8290f59fbc3SBjoern A. Zeeb  * as a hexadecimal value and convert it as if the expression was parsed
8300f59fbc3SBjoern A. Zeeb  * as a decimal value.  Returns -1 if the expression was not a valid
8310f59fbc3SBjoern A. Zeeb  * decimal value.
8320f59fbc3SBjoern A. Zeeb  */
8330f59fbc3SBjoern A. Zeeb db_expr_t
8340f59fbc3SBjoern A. Zeeb db_hex2dec(db_expr_t expr)
8350f59fbc3SBjoern A. Zeeb {
8360f59fbc3SBjoern A. Zeeb 	uintptr_t x, y;
8370f59fbc3SBjoern A. Zeeb 	db_expr_t val;
8380f59fbc3SBjoern A. Zeeb 
8390f59fbc3SBjoern A. Zeeb 	y = 1;
8400f59fbc3SBjoern A. Zeeb 	val = 0;
8410f59fbc3SBjoern A. Zeeb 	x = expr;
8420f59fbc3SBjoern A. Zeeb 	while (x != 0) {
8430f59fbc3SBjoern A. Zeeb 		if (x % 16 > 9)
8440f59fbc3SBjoern A. Zeeb 			return (-1);
8450f59fbc3SBjoern A. Zeeb 		val += (x % 16) * (y);
8460f59fbc3SBjoern A. Zeeb 		x >>= 4;
8470f59fbc3SBjoern A. Zeeb 		y *= 10;
8480f59fbc3SBjoern A. Zeeb 	}
8490f59fbc3SBjoern A. Zeeb 	return (val);
8500f59fbc3SBjoern A. Zeeb }
851