db_trap.c revision 1.7 
1/*	$OpenBSD: db_trap.c,v 1.7 2001/08/18 18:50:59 art Exp $	*/
2/*	$NetBSD: db_trap.c,v 1.9 1996/02/05 01:57:18 christos Exp $	*/
3
4/*
5 * Mach Operating System
6 * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University
7 * All Rights Reserved.
8 *
9 * Permission to use, copy, modify and distribute this software and its
10 * documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie Mellon
27 * the rights to redistribute these changes.
28 *
29 * 	Author: David B. Golub, Carnegie Mellon University
30 *	Date:	7/90
31 */
32
33/*
34 * Trap entry point to kernel debugger.
35 */
36#include <sys/param.h>
37#include <sys/proc.h>
38#include <sys/systm.h>
39
40#include <vm/vm.h>
41
42#include <machine/db_machdep.h>
43
44#include <ddb/db_run.h>
45#include <ddb/db_command.h>
46#include <ddb/db_break.h>
47#include <ddb/db_output.h>
48#include <ddb/db_sym.h>
49#include <ddb/db_extern.h>
50
51void
52db_trap(type, code)
53	int	type, code;
54{
55	boolean_t	bkpt;
56	boolean_t	watchpt;
57
58	bkpt = IS_BREAKPOINT_TRAP(type, code);
59	watchpt = IS_WATCHPOINT_TRAP(type, code);
60
61	if (db_stop_at_pc(DDB_REGS, &bkpt)) {
62		if (db_inst_count) {
63			db_printf("After %d instructions ", db_inst_count);
64			db_printf("(%d loads, %d stores),\n", db_load_count,
65			    db_store_count);
66		}
67		if (bkpt)
68			db_printf("Breakpoint at\t");
69		else if (watchpt)
70			db_printf("Watchpoint at\t");
71		else
72			db_printf("Stopped at\t");
73		db_dot = PC_REGS(DDB_REGS);
74		db_print_loc_and_inst(db_dot);
75
76		if (panicstr != NULL) {
77			if (db_print_position() != 0)
78				db_printf("\n");
79			db_printf("\n\n**********************************\n");
80			db_printf("RUN AT LEAST 'trace' AND 'ps' AND INCLUDE "
81			    "THE OUTPUT WHEN REPORTING THIS PANIC!\n");
82			db_printf("DO NOT EVEN BOTHER REPORTING THIS WITHOUT "
83			    "INCLUDING THAT INFORMATION!\n");
84			db_printf("DON'T WASTE OUR TIME!\n");
85			db_printf("**********************************\n\n");
86		}
87
88		db_command_loop();
89	}
90
91	db_restart_at_pc(DDB_REGS, watchpt);
92}
93