bsd/kern/subr_xxx.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1982, 1986, 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)subr_xxx.c  8.1 (Berkeley) 6/10/93
  62  */
  63
  64 #include <sys/param.h>
  65 #include <sys/systm.h>
  66 #include <sys/kernel.h>
  67 #include <sys/conf.h>
  68 #include <sys/proc_internal.h>
  69 #include <sys/vnode.h>
  70 #include <sys/uio.h>
  71 #include <sys/sysproto.h>
  72
  73 #include <sys/signalvar.h>              /* for psignal() */
  74 #include <kern/debug.h>
  75
  76 #ifdef GPROF
  77 #include <sys/gmon.h>
  78 #endif
  79
  80 #if DEVELOPMENT || DEBUG
  81 bool send_sigsys = true;
  82 #else
  83 #define send_sigsys true
  84 #endif
  85
  86 /*
  87  * Unsupported device function (e.g. writing to read-only device).
  88  */
  89 int
  90 enodev(void)
  91 {
  92         return (ENODEV);
  93 }
  94
  95 /*
  96  * Unsupported strategy function.
  97  */
  98 void
  99 enodev_strat(void)
 100 {
 101         return;
 102 }
 103
 104 /*
 105  * Unconfigured device function; driver not configured.
 106  */
 107 int
 108 enxio(void)
 109 {
 110         return (ENXIO);
 111 }
 112
 113 /*
 114  * Unsupported ioctl function.
 115  */
 116 int
 117 enoioctl(void)
 118 {
 119         return (ENOTTY);
 120 }
 121
 122
 123 /*
 124  * Unsupported system function.
 125  * This is used for an otherwise-reasonable operation
 126  * that is not supported by the current system binary.
 127  */
 128 int
 129 enosys(void)
 130 {
 131         return (ENOSYS);
 132 }
 133
 134 /*
 135  * Return error for operation not supported
 136  * on a specific object or file type.
 137  *
 138  * XXX Name of this routine is wrong.
 139  */
 140 int
 141 eopnotsupp(void)
 142 {
 143         return (ENOTSUP);
 144 }
 145
 146 /*
 147  * Generic null operation, always returns success.
 148  */
 149 int
 150 nullop(void)
 151 {
 152         return (0);
 153 }
 154
 155
 156 /*
 157  * Null routine; placed in insignificant entries
 158  * in the bdevsw and cdevsw tables.
 159  */
 160 int
 161 nulldev(void)
 162 {
 163         return (0);
 164 }
 165
 166 /*
 167  * Null system calls. Not invalid, just not configured.
 168  */
 169 int
 170 errsys(void)
 171 {
 172         return(EINVAL);
 173 }
 174
 175 void
 176 nullsys(void)
 177 {
 178 }
 179
 180 /*
 181  * nonexistent system call-- signal process (may want to handle it)
 182  * flag error if process won't see signal immediately
 183  * Q: should we do that all the time ??
 184  */
 185 /* ARGSUSED */
 186 int
 187 nosys(__unused struct proc *p, __unused struct nosys_args *args, __unused int32_t *retval)
 188 {
 189         if (send_sigsys) {
 190                 psignal_uthread(current_thread(), SIGSYS);
 191         }
 192         return (ENOSYS);
 193 }
 194
 195 #ifdef  GPROF
 196 /*
 197  * Stub routine in case it is ever possible to free space.
 198  */
 199 void
 200 cfreemem(caddr_t cp, int size)
 201 {
 202         printf("freeing %p, size %d\n", cp, size);
 203 }
 204 #endif
 205
 206 #if !CRYPTO
 207 #include <crypto/rc4/rc4.h>
 208
 209 /* Stubs must be present in all configs for Unsupported KPI exports */
 210
 211 void
 212 rc4_init(struct rc4_state *state __unused, const u_char *key __unused, int keylen __unused)
 213 {
 214         panic("rc4_init: unsupported kernel configuration");
 215 }
 216
 217 void
 218 rc4_crypt(struct rc4_state *state __unused,
 219                   const u_char *inbuf __unused, u_char *outbuf __unused, int buflen __unused)
 220 {
 221         panic("rc4_crypt: unsupported kernel configuration");
 222 }
 223 #endif /* !CRYPTO */
 224