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