bsd/sys/systm.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  26 /*-
  27  * Copyright (c) 1982, 1988, 1991, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  * (c) UNIX System Laboratories, Inc.
  30  * All or some portions of this file are derived from material licensed
  31  * to the University of California by American Telephone and Telegraph
  32  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  33  * the permission of UNIX System Laboratories, Inc.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)systm.h     8.7 (Berkeley) 3/29/95
  64  */
  65
  66 /*
  67  * The `securelevel' variable controls the security level of the system.
  68  * It can only be decreased by process 1 (/sbin/init).
  69  *
  70  * Security levels are as follows:
  71  *   -1 permannently insecure mode - always run system in level 0 mode.
  72  *    0 insecure mode - immutable and append-only flags make be turned off.
  73  *      All devices may be read or written subject to permission modes.
  74  *    1 secure mode - immutable and append-only flags may not be changed;
  75  *      raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
  76  *      read-only.
  77  *    2 highly secure mode - same as (1) plus raw disks are always
  78  *      read-only whether mounted or not. This level precludes tampering
  79  *      with filesystems by unmounting them, but also inhibits running
  80  *      newfs while the system is secured.
  81  *
  82  * In normal operation, the system runs in level 0 mode while single user
  83  * and in level 1 mode while multiuser. If level 2 mode is desired while
  84  * running multiuser, it can be set in the multiuser startup script
  85  * (/etc/rc.local) using sysctl(1). If it is desired to run the system
  86  * in level 0 mode while multiuser, initialize the variable securelevel
  87  * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
  88  * zero as that would allow the vmunix binary to be patched to -1.
  89  * Without initialization, securelevel loads in the BSS area which only
  90  * comes into existence when the kernel is loaded and hence cannot be
  91  * patched by a stalking hacker.
  92  */
  93
  94 #ifndef _SYS_SYSTM_H_
  95 #define _SYS_SYSTM_H_
  96
  97 #include <sys/appleapiopts.h>
  98 #include <sys/cdefs.h>
  99 #include <sys/types.h>
 100 #include <sys/time.h>
 101 #include <sys/tty.h>
 102 #include <sys/vm.h>
 103 #include <sys/proc.h>
 104 #include <sys/linker_set.h>
 105 __BEGIN_DECLS
 106 #include <kern/thread.h>
 107 __END_DECLS
 108
 109 #ifdef __APPLE_API_PRIVATE
 110 extern int securelevel;         /* system security level */
 111 extern const char *panicstr;    /* panic message */
 112 extern char version[];          /* system version */
 113 extern char copyright[];        /* system copyright */
 114
 115
 116 extern struct sysent {          /* system call table */
 117         int16_t         sy_narg;        /* number of args */
 118         int8_t          sy_parallel;/* can execute in parallel */
 119         int8_t          sy_funnel;      /* funnel type */
 120         int32_t         (*sy_call)();   /* implementing function */
 121 } sysent[];
 122 extern int nsysent;
 123
 124 extern int      boothowto;      /* reboot flags, from console subsystem */
 125 extern int      show_space;
 126
 127 extern int nblkdev;             /* number of entries in bdevsw */
 128 extern int nchrdev;             /* number of entries in cdevsw */
 129 extern dev_t rootdev;           /* root device */
 130 extern struct vnode *rootvp;    /* vnode equivalent to above */
 131 #endif /* __APPLE_API_PRIVATE */
 132
 133 #ifdef __APPLE_API_UNSTABLE
 134 #define NO_FUNNEL 0
 135 #define KERNEL_FUNNEL 1
 136 #define NETWORK_FUNNEL 2
 137
 138 extern funnel_t * kernel_flock;
 139 extern funnel_t * network_flock;
 140 #endif /* __APPLE_API_UNSTABLE */
 141
 142 #define SYSINIT(a,b,c,d,e)
 143 #define MALLOC_DEFINE(a,b,c)
 144
 145 #define getenv_int(a,b) (*b = 0)
 146 #define KASSERT(exp,msg)
 147
 148 /*
 149  * General function declarations.
 150  */
 151 __BEGIN_DECLS
 152 int     nullop __P((void));
 153 int     enodev ();              /* avoid actual prototype for multiple use */
 154 void    enodev_strat();
 155 int     nulldev();
 156 int     enoioctl __P((void));
 157 int     enxio __P((void));
 158 int     eopnotsupp __P((void));
 159 int     einval __P((void));
 160
 161 #ifdef __APPLE_API_UNSTABLE
 162 int     seltrue __P((dev_t dev, int which, struct proc *p));
 163 #endif /* __APPLE_API_UNSTABLE */
 164
 165 void    *hashinit __P((int count, int type, u_long *hashmask));
 166 int     nosys __P((struct proc *, void *, register_t *));
 167
 168 #ifdef __GNUC__
 169 volatile void   panic __P((const char *, ...));
 170 #else
 171 void    panic __P((const char *, ...));
 172 #endif
 173 void    tablefull __P((const char *));
 174 void    log __P((int, const char *, ...));
 175 void    kprintf __P((const char *, ...));
 176 void    ttyprintf __P((struct tty *, const char *, ...));
 177
 178 int     kvprintf __P((char const *, void (*)(int, void*), void *, int,
 179                       _BSD_VA_LIST_));
 180
 181 int     snprintf __P((char *, size_t, const char *, ...));
 182 int     sprintf __P((char *buf, const char *, ...));
 183 void    uprintf __P((const char *, ...));
 184 void    vprintf __P((const char *, _BSD_VA_LIST_));
 185 int     vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_));
 186 int     vsprintf __P((char *buf, const char *, _BSD_VA_LIST_));
 187
 188 void    bcopy __P((const void *from, void *to, size_t len));
 189 void    ovbcopy __P((const void *from, void *to, size_t len));
 190 void    bzero __P((void *buf, size_t len));
 191
 192 int     copystr __P((void *kfaddr, void *kdaddr, size_t len, size_t *done));
 193 int     copyinstr __P((void *udaddr, void *kaddr, size_t len, size_t *done));
 194 int     copyoutstr __P((void *kaddr, void *udaddr, size_t len, size_t *done));
 195 int     copyin __P((void *udaddr, void *kaddr, size_t len));
 196 int     copyout __P((void *kaddr, void *udaddr, size_t len));
 197 int     copywithin __P((void *saddr, void *daddr, size_t len));
 198
 199 int     fubyte __P((void *base));
 200 #ifdef notdef
 201 int     fuibyte __P((void *base));
 202 #endif
 203 int     subyte __P((void *base, int byte));
 204 int     suibyte __P((void *base, int byte));
 205 long    fuword __P((void *base));
 206 long    fuiword __P((void *base));
 207 int     suword __P((void *base, long word));
 208 int     suiword __P((void *base, long word));
 209
 210 #ifdef __APPLE_API_UNSTABLE
 211 int     hzto __P((struct timeval *tv));
 212 typedef void (*timeout_fcn_t)(void *);
 213 void    timeout __P((void (*)(void *), void *arg, int ticks));
 214 void    untimeout __P((void (*)(void *), void *arg));
 215 void    realitexpire __P((void *));
 216 #endif /* __APPLE_API_UNSTABLE */
 217
 218 #ifdef __APPLE_API_PRIVATE
 219 void    bsd_hardclock __P((boolean_t usermode, caddr_t pc, int numticks));
 220 void    gatherstats __P((boolean_t usermode, caddr_t pc));
 221
 222 void    initclocks __P((void));
 223
 224 void    startprofclock __P((struct proc *));
 225 void    stopprofclock __P((struct proc *));
 226 void    setstatclockrate __P((int hzrate));
 227 #ifdef DDB
 228 /* debugger entry points */
 229 int     Debugger __P((void));   /* in DDB only */
 230 #endif
 231
 232 void    set_fsblocksize __P((struct vnode *));
 233 #endif /* __APPLE_API_PRIVATE */
 234
 235 void addlog __P((const char *, ...));
 236 void printf __P((const char *, ...));
 237
 238 extern boolean_t    thread_funnel_switch(int oldfnl, int newfnl);
 239
 240 #include <libkern/libkern.h>
 241
 242 __END_DECLS
 243
 244 #endif /* !_SYS_SYSTM_H_ */
 245