Annotation of sys/ddb/db_trap.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: db_trap.c,v 1.13 2007/06/04 17:03:04 miod 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 <uvm/uvm_extern.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: #include <ddb/db_interface.h>
51:
52: void
53: db_trap(int type, int 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: /*
77: * Just in case we do not have any usable console driver,
78: * give the user a traceback.
79: */
80: if (cold) {
81: db_stack_trace_print(db_dot, 0, 10 /* arbitrary */, "",
82: db_printf);
83: }
84:
85: if (panicstr != NULL) {
86: if (db_print_position() != 0)
87: db_printf("\n");
88: db_printf("RUN AT LEAST 'trace' AND 'ps' AND INCLUDE "
89: "OUTPUT WHEN REPORTING THIS PANIC!\n");
90: db_printf("DO NOT EVEN BOTHER REPORTING THIS WITHOUT "
91: "INCLUDING THAT INFORMATION!\n");
92: }
93:
94: db_command_loop();
95: }
96:
97: db_restart_at_pc(DDB_REGS, watchpt);
98: }
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