FreeBSD/Linux Kernel Cross Reference
sys/bsd/sys/systm.h

     /*
      * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
    /*-
     * Copyright (c) 1982, 1988, 1991, 1993
     *      The Regents of the University of California.  All rights reserved.
     * (c) UNIX System Laboratories, Inc.
     * All or some portions of this file are derived from material licensed
     * to the University of California by American Telephone and Telegraph
     * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     * the permission of UNIX System Laboratories, Inc.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)systm.h     8.7 (Berkeley) 3/29/95
     */
     
    /*
     * The `securelevel' variable controls the security level of the system.
     * It can only be decreased by process 1 (/sbin/init).
     *
     * Security levels are as follows:
     *   -1 permannently insecure mode - always run system in level 0 mode.
     *    0 insecure mode - immutable and append-only flags make be turned off.
     *      All devices may be read or written subject to permission modes.
     *    1 secure mode - immutable and append-only flags may not be changed;
     *      raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
     *      read-only.
     *    2 highly secure mode - same as (1) plus raw disks are always
     *      read-only whether mounted or not. This level precludes tampering 
     *      with filesystems by unmounting them, but also inhibits running
     *      newfs while the system is secured.
     *
     * In normal operation, the system runs in level 0 mode while single user
     * and in level 1 mode while multiuser. If level 2 mode is desired while
     * running multiuser, it can be set in the multiuser startup script
     * (/etc/rc.local) using sysctl(1). If it is desired to run the system
     * in level 0 mode while multiuser, initialize the variable securelevel
     * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
     * zero as that would allow the vmunix binary to be patched to -1.
     * Without initialization, securelevel loads in the BSS area which only
     * comes into existence when the kernel is loaded and hence cannot be
     * patched by a stalking hacker.
     */
    
    #ifndef _SYS_SYSTM_H_
    #define _SYS_SYSTM_H_
    
    #include <sys/appleapiopts.h>
    #include <sys/cdefs.h>
    #include <sys/types.h>
   #include <sys/time.h>
   #include <sys/tty.h>
   #include <sys/vm.h>
   #include <sys/proc.h>
   #include <sys/linker_set.h>
   __BEGIN_DECLS
   #include <kern/thread.h>
   __END_DECLS
   
   #ifdef __APPLE_API_PRIVATE
   extern int securelevel;         /* system security level */
   extern const char *panicstr;    /* panic message */
   extern char version[];          /* system version */
   extern char copyright[];        /* system copyright */
   
   
   extern struct sysent {          /* system call table */
           int16_t         sy_narg;        /* number of args */
           int8_t          sy_parallel;/* can execute in parallel */
           int8_t          sy_funnel;      /* funnel type */
           int32_t         (*sy_call)();   /* implementing function */
   } sysent[];
   extern int nsysent;
   
   extern int      boothowto;      /* reboot flags, from console subsystem */
   extern int      show_space;
   
   extern int nblkdev;             /* number of entries in bdevsw */
   extern int nchrdev;             /* number of entries in cdevsw */
   extern dev_t rootdev;           /* root device */
   extern struct vnode *rootvp;    /* vnode equivalent to above */
   #endif /* __APPLE_API_PRIVATE */
   
   #ifdef __APPLE_API_UNSTABLE
   #define NO_FUNNEL 0
   #define KERNEL_FUNNEL 1
   #define NETWORK_FUNNEL 2
   
   extern funnel_t * kernel_flock;
   extern funnel_t * network_flock;
   #endif /* __APPLE_API_UNSTABLE */
   
   #define SYSINIT(a,b,c,d,e)
   #define MALLOC_DEFINE(a,b,c)
   
   #define getenv_int(a,b) (*b = 0)
   #define KASSERT(exp,msg)
   
   /*
    * General function declarations.
    */
   __BEGIN_DECLS
   int     nullop __P((void));
   int     enodev ();              /* avoid actual prototype for multiple use */
   void    enodev_strat();
   int     nulldev();
   int     enoioctl __P((void));
   int     enxio __P((void));
   int     eopnotsupp __P((void));
   int     einval __P((void));
   
   #ifdef __APPLE_API_UNSTABLE
   int     seltrue __P((dev_t dev, int which, struct proc *p));
   #endif /* __APPLE_API_UNSTABLE */
   
   void    *hashinit __P((int count, int type, u_long *hashmask));
   int     nosys __P((struct proc *, void *, register_t *));
   
   #ifdef __GNUC__
   volatile void   panic __P((const char *, ...));
   #else
   void    panic __P((const char *, ...));
   #endif
   void    tablefull __P((const char *));
   void    log __P((int, const char *, ...));
   void    kprintf __P((const char *, ...));
   void    ttyprintf __P((struct tty *, const char *, ...));
   
   int     kvprintf __P((char const *, void (*)(int, void*), void *, int,
                         _BSD_VA_LIST_));
   
   int     snprintf __P((char *, size_t, const char *, ...));
   int     sprintf __P((char *buf, const char *, ...));
   void    uprintf __P((const char *, ...));
   void    vprintf __P((const char *, _BSD_VA_LIST_));
   int     vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_));
   int     vsprintf __P((char *buf, const char *, _BSD_VA_LIST_));
   
   void    bcopy __P((const void *from, void *to, size_t len));
   void    ovbcopy __P((const void *from, void *to, size_t len));
   void    bzero __P((void *buf, size_t len));
   
   int     copystr __P((void *kfaddr, void *kdaddr, size_t len, size_t *done));
   int     copyinstr __P((void *udaddr, void *kaddr, size_t len, size_t *done));
   int     copyoutstr __P((void *kaddr, void *udaddr, size_t len, size_t *done));
   int     copyin __P((void *udaddr, void *kaddr, size_t len));
   int     copyout __P((void *kaddr, void *udaddr, size_t len));
   int     copywithin __P((void *saddr, void *daddr, size_t len));
   
   int     fubyte __P((void *base));
   #ifdef notdef
   int     fuibyte __P((void *base));
   #endif
   int     subyte __P((void *base, int byte));
   int     suibyte __P((void *base, int byte));
   long    fuword __P((void *base));
   long    fuiword __P((void *base));
   int     suword __P((void *base, long word));
   int     suiword __P((void *base, long word));
   
   #ifdef __APPLE_API_UNSTABLE
   int     hzto __P((struct timeval *tv));
   typedef void (*timeout_fcn_t)(void *);
   void    timeout __P((void (*)(void *), void *arg, int ticks));
   void    untimeout __P((void (*)(void *), void *arg));
   void    realitexpire __P((void *));
   #endif /* __APPLE_API_UNSTABLE */
   
   #ifdef __APPLE_API_PRIVATE
   void    bsd_hardclock __P((boolean_t usermode, caddr_t pc, int numticks));
   void    gatherstats __P((boolean_t usermode, caddr_t pc));
   
   void    initclocks __P((void));
   
   void    startprofclock __P((struct proc *));
   void    stopprofclock __P((struct proc *));
   void    setstatclockrate __P((int hzrate));
   #ifdef DDB
   /* debugger entry points */
   int     Debugger __P((void));   /* in DDB only */
   #endif
   
   void    set_fsblocksize __P((struct vnode *));
   #endif /* __APPLE_API_PRIVATE */
   
   void addlog __P((const char *, ...));
   void printf __P((const char *, ...));
   
   extern boolean_t    thread_funnel_switch(int oldfnl, int newfnl);
   
   #include <libkern/libkern.h>
   
   __END_DECLS
   
   #endif /* !_SYS_SYSTM_H_ */
   

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