1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2012 by Delphix. All rights reserved. 24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 25 * Copyright 2017 RackTop Systems. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/types.h> 30 #include <sys/varargs.h> 31 #include <sys/systm.h> 32 #include <sys/cmn_err.h> 33 #include <sys/log.h> 34 35 #include <fakekernel.h> 36 37 void abort(void) __NORETURN; 38 39 char *volatile panicstr; 40 va_list panicargs; 41 char panicbuf[512]; 42 43 volatile int aok; 44 45 static const int 46 ce_flags[CE_IGNORE] = { SL_NOTE, SL_NOTE, SL_WARN, SL_FATAL }; 47 static const char 48 ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; 49 static const char 50 ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; 51 52 53 /* 54 * This function is just a stub, exported NODIRECT so that 55 * comsumers like fksmbd can provide their own. 56 * (One that actually prints the messages.) 57 * 58 * It's used by fakekernel_cprintf() below. 59 * The flags are SL_... from strlog.h 60 */ 61 /* ARGSUSED */ 62 void 63 fakekernel_putlog(char *msg, size_t len, int flags) 64 { 65 } 66 67 /* 68 * fakekernel_cprintf() corresponds to os/printf.c:cprintf() 69 * This formats the message and calls fakekernel_putlog(). 70 * It's exported NODIRECT to allow replacment. 71 * The flags are SL_... from strlog.h 72 */ 73 void 74 fakekernel_cprintf(const char *fmt, va_list adx, int flags, 75 const char *prefix, const char *suffix) 76 { 77 size_t bufsize = LOG_MSGSIZE; 78 char buf[LOG_MSGSIZE]; 79 char *bufp = buf; 80 char *msgp, *bufend; 81 size_t len; 82 83 if (strchr("^!?", fmt[0]) != NULL) { 84 if (fmt[0] == '^') 85 flags |= SL_CONSONLY; 86 else if (fmt[0] == '!') 87 flags |= SL_LOGONLY; 88 fmt++; 89 } 90 91 bufend = bufp + bufsize; 92 msgp = bufp; 93 msgp += snprintf(msgp, bufend - msgp, "[fake_kernel] "); 94 msgp += snprintf(msgp, bufend - msgp, prefix); 95 msgp += vsnprintf(msgp, bufend - msgp, fmt, adx); 96 msgp += snprintf(msgp, bufend - msgp, suffix); 97 len = msgp - bufp; 98 99 fakekernel_putlog(bufp, len, flags); 100 } 101 102 /* 103 * "User-level crash dump", if you will. 104 */ 105 void 106 vpanic(const char *fmt, va_list adx) 107 { 108 va_list tmpargs; 109 110 panicstr = (char *)fmt; 111 va_copy(panicargs, adx); 112 113 va_copy(tmpargs, adx); 114 fakekernel_cprintf(fmt, tmpargs, SL_FATAL, "fatal: ", "\n"); 115 116 /* Call libc`assfail() so that mdb ::status works */ 117 (void) vsnprintf(panicbuf, sizeof (panicbuf), fmt, adx); 118 assfail(panicbuf, "(panic)", 0); 119 120 abort(); /* avoid "noreturn" warnings */ 121 } 122 123 void 124 panic(const char *fmt, ...) 125 { 126 va_list adx; 127 128 va_start(adx, fmt); 129 vpanic(fmt, adx); 130 va_end(adx); 131 } 132 133 void 134 fm_panic(const char *fmt, ...) 135 { 136 va_list adx; 137 138 va_start(adx, fmt); 139 vpanic(fmt, adx); 140 va_end(adx); 141 } 142 143 void 144 vcmn_err(int ce, const char *fmt, va_list adx) 145 { 146 147 if (ce == CE_PANIC) 148 vpanic(fmt, adx); 149 if (ce >= CE_IGNORE) 150 return; 151 152 fakekernel_cprintf(fmt, adx, ce_flags[ce] | SL_CONSOLE, 153 ce_prefix[ce], ce_suffix[ce]); 154 } 155 156 /*PRINTFLIKE2*/ 157 void 158 cmn_err(int ce, const char *fmt, ...) 159 { 160 va_list adx; 161 162 va_start(adx, fmt); 163 vcmn_err(ce, fmt, adx); 164 va_end(adx); 165 } 166