bsd/sys/systm.h

   1 /*
   2  * Copyright (c) 2000-2004 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/appleapiopts.h>
  95 #include <sys/cdefs.h>
  96 #include <sys/types.h>
  97 #include <sys/time.h>
  98 #include <sys/ioctl.h>
  99 #include <sys/malloc.h>
 100 #ifdef BSD_KERNEL_PRIVATE
 101 #include <sys/tty.h>
 102 #include <sys/vm.h>
 103 #include <sys/linker_set.h>
 104 #endif
 105 #include <sys/proc.h>
 106 __BEGIN_DECLS
 107 #ifdef KERNEL
 108 #include <libkern/libkern.h>
 109 #endif
 110 #include <kern/thread.h>
 111 #include <kern/debug.h>
 112 __END_DECLS
 113
 114 #ifdef BSD_KERNEL_PRIVATE
 115 extern char version[];          /* system version */
 116 extern char copyright[];        /* system copyright */
 117
 118
 119 extern int      boothowto;      /* reboot flags, from console subsystem */
 120 extern int      show_space;
 121
 122 extern int nblkdev;             /* number of entries in bdevsw */
 123 extern int nchrdev;             /* number of entries in cdevsw */
 124 #endif /* BSD_KERNEL_PRIVATE */
 125
 126 #ifdef KERNEL_PRIVATE
 127 #define NO_FUNNEL 0
 128 #define KERNEL_FUNNEL 1
 129
 130 extern int securelevel;         /* system security level */
 131 extern dev_t rootdev;           /* root device */
 132 extern struct vnode *rootvp;    /* vnode equivalent to above */
 133 extern funnel_t * kernel_flock;
 134
 135 #endif /* KERNEL_PRIVATE */
 136
 137 #define SYSINIT(a,b,c,d,e)
 138 #define MALLOC_DEFINE(a,b,c)
 139
 140 #define getenv_int(a,b) (*b = 0)
 141 #define KASSERT(exp,msg)
 142
 143 /*
 144  * General function declarations.
 145  */
 146 __BEGIN_DECLS
 147 int     nullop(void);
 148 int     nulldev(void);
 149 int     enoioctl(void);
 150 int     enxio(void);
 151 int     eopnotsupp(void);
 152 int     einval(void);
 153
 154 #ifdef BSD_KERNEL_PRIVATE
 155 int     seltrue(dev_t dev, int which, struct proc *p);
 156 void    ttyprintf(struct tty *, const char *, ...);
 157 void    realitexpire(void *);
 158 int     hzto(struct timeval *tv);
 159 #endif /* __APPLE_API_UNSTABLE */
 160
 161 void    *hashinit(int count, int type, u_long *hashmask);
 162
 163 void    tablefull(const char *);
 164
 165 int     kvprintf(char const *, void (*)(int, void*), void *, int,
 166                       __darwin_va_list);
 167
 168 void    uprintf(const char *, ...);
 169
 170
 171 void    ovbcopy(const void *from, void *to, size_t len);
 172 int     copywithin(void *saddr, void *daddr, size_t len);
 173
 174 int     fubyte(user_addr_t addr);
 175 int     fuibyte(user_addr_t addr);
 176 int     subyte(user_addr_t addr, int byte);
 177 int     suibyte(user_addr_t addr, int byte);
 178 long   fuword(user_addr_t addr);
 179 long   fuiword(user_addr_t addr);
 180 int    suword(user_addr_t addr, long word);
 181 int    suiword(user_addr_t addr, long word);
 182 int64_t fulong(user_addr_t addr);
 183 int     sulong(user_addr_t addr, int64_t longword);
 184 uint64_t fuulong(user_addr_t addr);
 185 int     suulong(user_addr_t addr, uint64_t ulongword);
 186 #define fusize(_a)      ((user_size_t)fulong(_a))
 187 #define susize(_a, _s)  sulong((_a), (_s))
 188 #define fuptr(a)        ((user_addr_t)fulong(_a)
 189 #define suptr(_a, _p)   sulong((_a), (_p))
 190 int     useracc(user_addr_t addr, user_size_t len,int prot);
 191
 192 typedef void (*timeout_fcn_t)(void *);
 193 #ifdef KERNEL_PRIVATE
 194 void    timeout(void (*)(void *), void *arg, int ticks);
 195 void    untimeout(void (*)(void *), void *arg);
 196 #endif /* KERNEL_PRIVATE */
 197 void    bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
 198 void    bsd_untimeout(void (*)(void *), void *arg);
 199
 200 void    set_fsblocksize(struct vnode *);
 201
 202 #ifdef BSD_KERNEL_PRIVATE
 203 int     vslock(user_addr_t addr, user_size_t len);
 204 int     vsunlock(user_addr_t addr, user_size_t len, int dirtied);
 205 int     clone_system_shared_regions(int shared_regions_active,
 206                                     int chain_regions,
 207                                     int base_vnode);
 208
 209 extern kern_return_t bsd_exception(int, exception_data_type_t codes[], int);
 210 extern void     bsdinit_task(void);
 211 void    bsd_hardclock(boolean_t usermode, caddr_t pc, int numticks);
 212 void    gatherstats(boolean_t usermode, caddr_t pc);
 213
 214 void    initclocks(void);
 215
 216 void    startprofclock(struct proc *);
 217 void    stopprofclock(struct proc *);
 218 void    setstatclockrate(int hzrate);
 219
 220 struct time_value;
 221 void    get_procrustime(struct time_value *tv);
 222
 223 void    load_init_program(struct proc *p);
 224 #endif /* BSD_KERNEL_PRIVATE */
 225
 226
 227 __END_DECLS
 228
 229 #endif /* !_SYS_SYSTM_H_ */
 230