1 /*-
2  * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  */
27 
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/module.h>
32 #include <sys/conf.h>
33 #include <sys/uio.h>
34 #include <sys/malloc.h>
35 #include <sys/sysctl.h>
36 
37 
38 static	int panic_type = 0;
39 
40 static int
41 sysctl_panic_type(SYSCTL_HANDLER_ARGS)
42 {
43         int error, value;
44 	volatile int i;
45 
46         /* Write out the old value. */
47         error = SYSCTL_OUT(req, &panic_type, sizeof(int));
48         if (error || req->newptr == NULL)
49                 return (error);
50 
51         /* Read in and verify the new value. */
52         error = SYSCTL_IN(req, &value, sizeof(int));
53         if (error)
54                 return (error);
55         if (value < 0)
56                 return (EINVAL);
57         panic_type = value;
58 
59 	if (panic_type == 1)
60 		panic("Test panic type 1");
61 
62 	if (panic_type == 2)
63 		i = *(int *)0;	/* Fatal trap */
64 
65         return (0);
66 }
67 
68 
69 SYSCTL_PROC(_debug, OID_AUTO, panic_type, CTLTYPE_INT|CTLFLAG_RW,
70 	&panic_type, 0, sysctl_panic_type, "I",
71 	"Test panic type");
72 
73 
74 static int
75 ptest_modevent(module_t mod, int what, void *arg)
76 {
77 	switch (what) {
78         case MOD_LOAD:
79 		return(0);
80         case MOD_UNLOAD:
81 		return (0);
82         default:
83 		break;
84 	}
85 
86 	return (0);
87 }
88 
89 moduledata_t ptest_mdata = {
90 	"ptest",
91 	ptest_modevent,
92 	NULL
93 };
94 
95 DECLARE_MODULE(ptest, ptest_mdata, SI_SUB_DRIVERS, SI_ORDER_ANY);
96 MODULE_VERSION(ptest, 1);
97