1 /* $NetBSD: panic.c,v 1.1 2011/02/18 01:07:20 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: panic.c,v 1.1 2011/02/18 01:07:20 jmcneill Exp $"); 30 31 #include <sys/module.h> 32 33 MODULE(MODULE_CLASS_MISC, panic, NULL); 34 35 static void 36 panic_dopanic(void) 37 { 38 /* just call panic */ 39 panic("oops"); 40 } 41 42 static void 43 panic_donullptr(void) 44 { 45 /* null ptr dereference */ 46 *(int *)NULL = 1; 47 } 48 49 static const struct { 50 const char *name; 51 void (*func)(void); 52 } panic_howto[] = { 53 { "panic", panic_dopanic }, 54 { "nullptr", panic_donullptr }, 55 }; 56 57 static int 58 panic_modcmd(modcmd_t cmd, void *opaque) 59 { 60 if (cmd == MODULE_CMD_INIT) { 61 prop_dictionary_t props = opaque; 62 const char *how = NULL; 63 unsigned int i; 64 65 if (props) 66 prop_dictionary_get_cstring_nocopy(props, "how", &how); 67 if (how == NULL) 68 how = "panic"; 69 70 for (i = 0; i < __arraycount(panic_howto); i++) { 71 if (strcmp(how, panic_howto[i].name) == 0) { 72 panic_howto[i].func(); 73 break; 74 } 75 } 76 if (i == __arraycount(panic_howto)) 77 printf("%s: no how '%s'\n", __func__, how); 78 else 79 printf("%s: how '%s' didn't panic?\n", __func__, how); 80 81 return EINVAL; 82 } 83 84 return ENOTTY; 85 } 86