bsd/sys/systm.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  24 /*-
  25  * Copyright (c) 1982, 1988, 1991, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  * (c) UNIX System Laboratories, Inc.
  28  * All or some portions of this file are derived from material licensed
  29  * to the University of California by American Telephone and Telegraph
  30  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  31  * the permission of UNIX System Laboratories, Inc.
  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  *      @(#)systm.h     8.7 (Berkeley) 3/29/95
  62  */
  63
  64 /*
  65  * The `securelevel' variable controls the security level of the system.
  66  * It can only be decreased by process 1 (/sbin/init).
  67  *
  68  * Security levels are as follows:
  69  *   -1 permannently insecure mode - always run system in level 0 mode.
  70  *    0 insecure mode - immutable and append-only flags make be turned off.
  71  *      All devices may be read or written subject to permission modes.
  72  *    1 secure mode - immutable and append-only flags may not be changed;
  73  *      raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
  74  *      read-only.
  75  *    2 highly secure mode - same as (1) plus raw disks are always
  76  *      read-only whether mounted or not. This level precludes tampering
  77  *      with filesystems by unmounting them, but also inhibits running
  78  *      newfs while the system is secured.
  79  *
  80  * In normal operation, the system runs in level 0 mode while single user
  81  * and in level 1 mode while multiuser. If level 2 mode is desired while
  82  * running multiuser, it can be set in the multiuser startup script
  83  * (/etc/rc.local) using sysctl(1). If it is desired to run the system
  84  * in level 0 mode while multiuser, initialize the variable securelevel
  85  * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
  86  * zero as that would allow the vmunix binary to be patched to -1.
  87  * Without initialization, securelevel loads in the BSS area which only
  88  * comes into existence when the kernel is loaded and hence cannot be
  89  * patched by a stalking hacker.
  90  */
  91
  92 #ifndef _SYS_SYSTM_H_
  93 #define _SYS_SYSTM_H_
  94
  95 #include <sys/appleapiopts.h>
  96 #include <sys/cdefs.h>
  97 #include <sys/types.h>
  98 #include <sys/time.h>
  99 #include <sys/ioctl.h>
 100 #include <sys/malloc.h>
 101 #ifdef BSD_KERNEL_PRIVATE
 102 #include <sys/tty.h>
 103 #include <sys/vm.h>
 104 #include <sys/linker_set.h>
 105 #endif
 106 #include <sys/proc.h>
 107 __BEGIN_DECLS
 108 #ifdef KERNEL
 109 #include <libkern/libkern.h>
 110 #endif
 111 #include <kern/thread.h>
 112 #include <kern/debug.h>
 113 __END_DECLS
 114
 115 #ifdef BSD_KERNEL_PRIVATE
 116 extern char version[];          /* system version */
 117 extern char copyright[];        /* system copyright */
 118
 119
 120 extern int      boothowto;      /* reboot flags, from console subsystem */
 121 extern int      show_space;
 122
 123 extern int nblkdev;             /* number of entries in bdevsw */
 124 extern int nchrdev;             /* number of entries in cdevsw */
 125 #endif /* BSD_KERNEL_PRIVATE */
 126
 127 #ifdef KERNEL_PRIVATE
 128 #define NO_FUNNEL 0
 129 #define KERNEL_FUNNEL 1
 130
 131 extern int securelevel;         /* system security level */
 132 extern dev_t rootdev;           /* root device */
 133 extern struct vnode *rootvp;    /* vnode equivalent to above */
 134 extern funnel_t * kernel_flock;
 135
 136 #endif /* KERNEL_PRIVATE */
 137
 138 #define SYSINIT(a,b,c,d,e)
 139 #define MALLOC_DEFINE(a,b,c)
 140
 141 #define getenv_int(a,b) (*b = 0)
 142 #define KASSERT(exp,msg)
 143
 144 /*
 145  * General function declarations.
 146  */
 147 __BEGIN_DECLS
 148 int     nullop(void);
 149 int     nulldev(void);
 150 int     enoioctl(void);
 151 int     enxio(void);
 152 int     eopnotsupp(void);
 153 int     einval(void);
 154
 155 #ifdef BSD_KERNEL_PRIVATE
 156 int     seltrue(dev_t dev, int which, struct proc *p);
 157 void    ttyprintf(struct tty *, const char *, ...);
 158 void    realitexpire(void *);
 159 int     hzto(struct timeval *tv);
 160 #endif /* __APPLE_API_UNSTABLE */
 161
 162 void    *hashinit(int count, int type, u_long *hashmask);
 163
 164 void    tablefull(const char *);
 165
 166 int     kvprintf(char const *, void (*)(int, void*), void *, int,
 167                       __darwin_va_list);
 168
 169 void    uprintf(const char *, ...);
 170
 171
 172 void    ovbcopy(const void *from, void *to, size_t len);
 173 int     copywithin(void *saddr, void *daddr, size_t len);
 174
 175 int     fubyte(user_addr_t addr);
 176 int     fuibyte(user_addr_t addr);
 177 int     subyte(user_addr_t addr, int byte);
 178 int     suibyte(user_addr_t addr, int byte);
 179 long   fuword(user_addr_t addr);
 180 long   fuiword(user_addr_t addr);
 181 int    suword(user_addr_t addr, long word);
 182 int    suiword(user_addr_t addr, long word);
 183 int64_t fulong(user_addr_t addr);
 184 int     sulong(user_addr_t addr, int64_t longword);
 185 uint64_t fuulong(user_addr_t addr);
 186 int     suulong(user_addr_t addr, uint64_t ulongword);
 187 #define fusize(_a)      ((user_size_t)fulong(_a))
 188 #define susize(_a, _s)  sulong((_a), (_s))
 189 #define fuptr(a)        ((user_addr_t)fulong(_a)
 190 #define suptr(_a, _p)   sulong((_a), (_p))
 191 int     useracc(user_addr_t addr, user_size_t len,int prot);
 192
 193 typedef void (*timeout_fcn_t)(void *);
 194 #ifdef KERNEL_PRIVATE
 195 void    timeout(void (*)(void *), void *arg, int ticks);
 196 void    untimeout(void (*)(void *), void *arg);
 197 #endif /* KERNEL_PRIVATE */
 198 void    bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
 199 void    bsd_untimeout(void (*)(void *), void *arg);
 200
 201 void    set_fsblocksize(struct vnode *);
 202
 203 #ifdef BSD_KERNEL_PRIVATE
 204 int     vslock(user_addr_t addr, user_size_t len);
 205 int     vsunlock(user_addr_t addr, user_size_t len, int dirtied);
 206 int     clone_system_shared_regions(int shared_regions_active,
 207                                     int chain_regions,
 208                                     int base_vnode);
 209
 210 extern kern_return_t bsd_exception(int, exception_data_type_t codes[], int);
 211 extern void     bsdinit_task(void);
 212 void    bsd_hardclock(boolean_t usermode, caddr_t pc, int numticks);
 213 void    gatherstats(boolean_t usermode, caddr_t pc);
 214
 215 void    initclocks(void);
 216
 217 void    startprofclock(struct proc *);
 218 void    stopprofclock(struct proc *);
 219 void    setstatclockrate(int hzrate);
 220
 221 struct time_value;
 222 void    get_procrustime(struct time_value *tv);
 223
 224 void    load_init_program(struct proc *p);
 225 #endif /* BSD_KERNEL_PRIVATE */
 226
 227
 228 __END_DECLS
 229
 230 #endif /* !_SYS_SYSTM_H_ */
 231