bsd/sys/systm.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*-
  24  * Copyright (c) 1982, 1988, 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  * (c) UNIX System Laboratories, Inc.
  27  * All or some portions of this file are derived from material licensed
  28  * to the University of California by American Telephone and Telegraph
  29  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  30  * the permission of UNIX System Laboratories, Inc.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)systm.h     8.7 (Berkeley) 3/29/95
  61  */
  62
  63 /*
  64  * The `securelevel' variable controls the security level of the system.
  65  * It can only be decreased by process 1 (/sbin/init).
  66  *
  67  * Security levels are as follows:
  68  *   -1 permannently insecure mode - always run system in level 0 mode.
  69  *    0 insecure mode - immutable and append-only flags make be turned off.
  70  *      All devices may be read or written subject to permission modes.
  71  *    1 secure mode - immutable and append-only flags may not be changed;
  72  *      raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
  73  *      read-only.
  74  *    2 highly secure mode - same as (1) plus raw disks are always
  75  *      read-only whether mounted or not. This level precludes tampering
  76  *      with filesystems by unmounting them, but also inhibits running
  77  *      newfs while the system is secured.
  78  *
  79  * In normal operation, the system runs in level 0 mode while single user
  80  * and in level 1 mode while multiuser. If level 2 mode is desired while
  81  * running multiuser, it can be set in the multiuser startup script
  82  * (/etc/rc.local) using sysctl(1). If it is desired to run the system
  83  * in level 0 mode while multiuser, initialize the variable securelevel
  84  * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
  85  * zero as that would allow the vmunix binary to be patched to -1.
  86  * Without initialization, securelevel loads in the BSS area which only
  87  * comes into existence when the kernel is loaded and hence cannot be
  88  * patched by a stalking hacker.
  89  */
  90
  91 #ifndef _SYS_SYSTM_H_
  92 #define _SYS_SYSTM_H_
  93
  94 #include <sys/cdefs.h>
  95
  96 #include <sys/types.h>
  97 #include <sys/time.h>
  98 #include <sys/tty.h>
  99 #include <sys/vm.h>
 100 #include <sys/proc.h>
 101 #include <sys/linker_set.h>
 102 __BEGIN_DECLS
 103 #include <kern/thread.h>
 104 __END_DECLS
 105
 106 #define KERNEL_FUNNEL 1
 107 #define NETWORK_FUNNEL 2
 108
 109 extern int securelevel;         /* system security level */
 110 extern const char *panicstr;    /* panic message */
 111 extern char version[];          /* system version */
 112 extern char copyright[];        /* system copyright */
 113
 114 extern int nblkdev;             /* number of entries in bdevsw */
 115 extern int nchrdev;             /* number of entries in cdevsw */
 116
 117 extern dev_t rootdev;           /* root device */
 118 extern struct vnode *rootvp;    /* vnode equivalent to above */
 119
 120 extern struct sysent {          /* system call table */
 121         int16_t         sy_narg;        /* number of args */
 122         int8_t          sy_parallel;/* can execute in parallel */
 123         int8_t          sy_funnel;      /* funnel type */
 124         int32_t         (*sy_call)();   /* implementing function */
 125 } sysent[];
 126 extern int nsysent;
 127
 128 extern int      boothowto;      /* reboot flags, from console subsystem */
 129 extern int      show_space;
 130
 131 extern funnel_t * kernel_flock;
 132 extern funnel_t * network_flock;
 133
 134 #define SYSINIT(a,b,c,d,e)
 135 #define MALLOC_DEFINE(a,b,c)
 136
 137
 138 #define getenv_int(a,b) (*b = 0)
 139 #define KASSERT(exp,msg)
 140
 141 /*
 142  * General function declarations.
 143  */
 144 __BEGIN_DECLS
 145 int     nullop __P((void));
 146 int     enodev ();              /* avoid actual prototype for multiple use */
 147 void    enodev_strat();
 148 int     nulldev();
 149 int     enoioctl __P((void));
 150 int     enxio __P((void));
 151 int     eopnotsupp __P((void));
 152 int     einval __P((void));
 153 int     seltrue __P((dev_t dev, int which, struct proc *p));
 154 void    *hashinit __P((int count, int type, u_long *hashmask));
 155 int     nosys __P((struct proc *, void *, register_t *));
 156
 157 #ifdef __GNUC__
 158 volatile void   panic __P((const char *, ...));
 159 #else
 160 void    panic __P((const char *, ...));
 161 #endif
 162 void    tablefull __P((const char *));
 163 void    log __P((int, const char *, ...));
 164 void    kprintf __P((const char *, ...));
 165 void    ttyprintf __P((struct tty *, const char *, ...));
 166
 167 int     kvprintf __P((char const *, void (*)(int, void*), void *, int,
 168                       _BSD_VA_LIST_));
 169
 170 int     snprintf __P((char *, size_t, const char *, ...));
 171 int     sprintf __P((char *buf, const char *, ...));
 172 void    uprintf __P((const char *, ...));
 173 void    vprintf __P((const char *, _BSD_VA_LIST_));
 174 int     vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_));
 175 int     vsprintf __P((char *buf, const char *, _BSD_VA_LIST_));
 176
 177
 178 void    bcopy __P((const void *from, void *to, size_t len));
 179 void    ovbcopy __P((const void *from, void *to, size_t len));
 180 void    bzero __P((void *buf, size_t len));
 181
 182 int     copystr __P((void *kfaddr, void *kdaddr, size_t len, size_t *done));
 183 int     copyinstr __P((void *udaddr, void *kaddr, size_t len, size_t *done));
 184 int     copyoutstr __P((void *kaddr, void *udaddr, size_t len, size_t *done));
 185 int     copyin __P((void *udaddr, void *kaddr, size_t len));
 186 int     copyout __P((void *kaddr, void *udaddr, size_t len));
 187 int     copywithin __P((void *saddr, void *daddr, size_t len));
 188
 189 int     fubyte __P((void *base));
 190 #ifdef notdef
 191 int     fuibyte __P((void *base));
 192 #endif
 193 int     subyte __P((void *base, int byte));
 194 int     suibyte __P((void *base, int byte));
 195 long    fuword __P((void *base));
 196 long    fuiword __P((void *base));
 197 int     suword __P((void *base, long word));
 198 int     suiword __P((void *base, long word));
 199
 200 int     hzto __P((struct timeval *tv));
 201 typedef void (*timeout_fcn_t)(void *);
 202 void    timeout __P((void (*)(void *), void *arg, int ticks));
 203 void    untimeout __P((void (*)(void *), void *arg));
 204 void    realitexpire __P((void *));
 205
 206 void    bsd_hardclock __P((boolean_t usermode, caddr_t pc, int numticks));
 207 void    gatherstats __P((boolean_t usermode, caddr_t pc));
 208
 209 void    initclocks __P((void));
 210
 211 void    startprofclock __P((struct proc *));
 212 void    stopprofclock __P((struct proc *));
 213 void    setstatclockrate __P((int hzrate));
 214 void    set_fsblocksize __P((struct vnode *));
 215
 216 void addlog __P((const char *, ...));
 217 void printf __P((const char *, ...));
 218
 219 extern boolean_t    thread_funnel_switch(int oldfnl, int newfnl);
 220
 221 #include <libkern/libkern.h>
 222
 223 #ifdef DDB
 224 /* debugger entry points */
 225 int     Debugger __P((void));   /* in DDB only */
 226 #endif
 227
 228 __END_DECLS
 229
 230 #endif /* !_SYS_SYSTM_H_ */
 231