1 | /*- |
2 | * Copyright (c) 2000, 2002, 2006, 2007, 2009, 2013 The NetBSD Foundation, Inc. |
3 | * All rights reserved. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * |
14 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
15 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
16 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
17 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
18 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
19 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
20 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
21 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
22 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
23 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
24 | * POSSIBILITY OF SUCH DAMAGE. |
25 | */ |
26 | |
27 | #include <sys/cdefs.h> |
28 | __KERNEL_RCSID(0, "$NetBSD: db_panic.c,v 1.3 2014/01/22 15:20:40 christos Exp $" ); |
29 | |
30 | #include <sys/types.h> |
31 | #include <sys/cpu.h> |
32 | |
33 | #include <ddb/ddbvar.h> |
34 | #include <ddb/ddb.h> |
35 | |
36 | /* |
37 | * db_panic: Called by panic(). May print a stack trace; may enter the |
38 | * kernel debugger; may just return so that panic() will continue to |
39 | * halt or reboot the system. |
40 | */ |
41 | void db_panic(void) |
42 | { |
43 | |
44 | if (db_onpanic == 1) |
45 | Debugger(); |
46 | else if (db_onpanic >= 0) { |
47 | static int intrace = 0; |
48 | |
49 | if (intrace == 0) { |
50 | intrace = 1; |
51 | printf("cpu%u: Begin traceback...\n" , |
52 | cpu_index(curcpu())); |
53 | db_stack_trace_print( |
54 | (db_expr_t)(intptr_t)__builtin_frame_address(0), |
55 | true, 65535, "" , printf); |
56 | printf("cpu%u: End traceback...\n" , |
57 | cpu_index(curcpu())); |
58 | intrace = 0; |
59 | } else |
60 | printf("Faulted in mid-traceback; aborting...\n" ); |
61 | if (db_onpanic == 2) |
62 | Debugger(); |
63 | } |
64 | return; |
65 | } |
66 | |