343 lines
12 KiB
C
343 lines
12 KiB
C
/* $NetBSD: systm.h,v 1.112 2000/07/04 15:33:28 jdolecek Exp $ */
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/*-
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* Copyright (c) 1982, 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)systm.h 8.7 (Berkeley) 3/29/95
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*/
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/*
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* The `securelevel' variable controls the security level of the system.
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* It can only be decreased by process 1 (/sbin/init).
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*
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* Security levels are as follows:
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* -1 permanently insecure mode - always run system in level 0 mode.
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* 0 insecure mode - immutable and append-only flags may be turned off.
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* All devices may be read or written subject to permission modes.
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* 1 secure mode - immutable and append-only flags may not be changed;
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* raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
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* read-only.
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* 2 highly secure mode - same as (1) plus raw disks are always
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* read-only whether mounted or not. This level precludes tampering
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* with filesystems by unmounting them, but also inhibits running
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* newfs while the system is secured.
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*
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* In normal operation, the system runs in level 0 mode while single user
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* and in level 1 mode while multiuser. If level 2 mode is desired while
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* running multiuser, it can be set in the multiuser startup script
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* (/etc/rc.local) using sysctl(8). If it is desired to run the system
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* in level 0 mode while multiuser, initialize the variable securelevel
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* in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
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* zero as that would allow the vmunix binary to be patched to -1.
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* Without initialization, securelevel loads in the BSS area which only
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* comes into existence when the kernel is loaded and hence cannot be
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* patched by a stalking hacker.
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*/
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#ifndef _SYS_SYSTM_H_
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#define _SYS_SYSTM_H_
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#if defined(_KERNEL) && !defined(_LKM)
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#include "opt_ddb.h"
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#endif
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#include <machine/endian.h>
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struct clockframe;
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struct device;
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struct proc;
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struct timeval;
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struct tty;
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struct uio;
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struct vnode;
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extern int securelevel; /* system security level */
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extern const char *panicstr; /* panic message */
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extern int doing_shutdown; /* shutting down */
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extern char copyright[]; /* system copyright */
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extern char cpu_model[]; /* machine/cpu model name */
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extern char machine[]; /* machine type */
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extern char machine_arch[]; /* machine architecture */
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extern char osrelease[]; /* short system version */
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extern char ostype[]; /* system type */
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extern char version[]; /* system version */
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extern int autonicetime; /* time (in seconds) before autoniceval */
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extern int autoniceval; /* proc priority after autonicetime */
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extern int nblkdev; /* number of entries in bdevsw */
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extern int nchrdev; /* number of entries in cdevsw */
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extern int selwait; /* select timeout address */
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extern int maxmem; /* max memory per process */
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extern int physmem; /* physical memory */
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extern dev_t dumpdev; /* dump device */
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extern long dumplo; /* offset into dumpdev */
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extern int dumpsize; /* size of dump in pages */
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extern const char *dumpspec; /* how dump device was specified */
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extern dev_t rootdev; /* root device */
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extern struct vnode *rootvp; /* vnode equivalent to above */
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extern struct device *root_device; /* device equivalent to above */
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extern const char *rootspec; /* how root device was specified */
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/*
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* These represent the swap pseudo-device (`sw'). This device
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* is used by the swap pager to indirect through the routines
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* in sys/vm/vm_swap.c.
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*/
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extern dev_t swapdev; /* swapping device */
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extern struct vnode *swapdev_vp;/* vnode equivalent to above */
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typedef int sy_call_t __P((struct proc *, void *, register_t *));
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extern struct sysent { /* system call table */
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short sy_narg; /* number of args */
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short sy_argsize; /* total size of arguments */
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sy_call_t *sy_call; /* implementing function */
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} sysent[];
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extern int nsysent;
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#if BYTE_ORDER == BIG_ENDIAN
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#define SCARG(p,k) ((p)->k.be.datum) /* get arg from args pointer */
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#elif BYTE_ORDER == LITTLE_ENDIAN
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#define SCARG(p,k) ((p)->k.le.datum) /* get arg from args pointer */
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#else
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#error "what byte order is this machine?"
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#endif
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extern int boothowto; /* reboot flags, from console subsystem */
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extern void (*v_putc) __P((int)); /* Virtual console putc routine */
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extern void _insque __P((void *, void *));
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extern void _remque __P((void *));
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/* casts to keep lint happy, but it should be happy with void * */
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#define insque(q,p) _insque(q, p)
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#define remque(q) _remque(q)
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/*
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* General function declarations.
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*/
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int nullop __P((void *));
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int enodev __P((void));
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int enosys __P((void));
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int enoioctl __P((void));
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int enxio __P((void));
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int eopnotsupp __P((void));
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#if defined(LKM) || defined(_LKM)
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int lkmenodev __P((void));
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#endif
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int seltrue __P((dev_t dev, int events, struct proc *p));
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void *hashinit __P((int count, int type, int flags, u_long *hashmask));
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void hashdone __P((void *hashtbl, int type));
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int sys_nosys __P((struct proc *, void *, register_t *));
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void printf __P((const char *, ...))
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__kprintf_attribute__((__format__(__kprintf__,1,2)));
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int sprintf __P((char *buf, const char *, ...))
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__attribute__((__format__(__printf__,2,3)));
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int snprintf __P((char *buf, size_t, const char *, ...))
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__attribute__((__format__(__printf__,3,4)));
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void vprintf __P((const char *, _BSD_VA_LIST_));
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int vsprintf __P((char *buf, const char *, _BSD_VA_LIST_));
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int vsnprintf __P((char *buf, size_t, const char *, _BSD_VA_LIST_));
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void panic __P((const char *, ...))
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#ifdef __KPRINTF_ATTRIBUTE__
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__kprintf_attribute__((__noreturn__,__format__(__kprintf__,1,2)));
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#else
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__attribute__((__noreturn__));
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#endif
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void uprintf __P((const char *, ...))
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__kprintf_attribute__((__format__(__kprintf__,1,2)));
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void ttyprintf __P((struct tty *, const char *, ...))
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__kprintf_attribute__((__format__(__kprintf__,2,3)));
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char *bitmask_snprintf __P((u_quad_t, const char *, char *, size_t));
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int humanize_number __P((char *, size_t, u_int64_t, const char *, int));
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int format_bytes __P((char *, size_t, u_int64_t));
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void tablefull __P((const char *, const char *));
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int kcopy __P((const void *, void *, size_t));
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#define bcopy(src, dst, len) memcpy(dst, src, len)
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#define bzero(src, len) memset(src, 0, len)
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#define bcmp(a, b, len) memcmp(a, b, len)
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int copystr __P((const void *, void *, size_t, size_t *));
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int copyinstr __P((const void *, void *, size_t, size_t *));
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int copyoutstr __P((const void *, void *, size_t, size_t *));
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int copyin __P((const void *, void *, size_t));
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int copyout __P((const void *, void *, size_t));
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int subyte __P((void *, int));
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int suibyte __P((void *, int));
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int susword __P((void *, short));
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int suisword __P((void *, short));
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int suswintr __P((void *, short));
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int suword __P((void *, long));
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int suiword __P((void *, long));
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int fubyte __P((const void *));
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int fuibyte __P((const void *));
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int fusword __P((const void *));
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int fuisword __P((const void *));
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int fuswintr __P((const void *));
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long fuword __P((const void *));
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long fuiword __P((const void *));
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int hzto __P((struct timeval *tv));
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void realitexpire __P((void *));
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void hardclock __P((struct clockframe *frame));
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void softclock __P((void));
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void statclock __P((struct clockframe *frame));
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#ifdef NTP
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void hardupdate __P((long offset));
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#ifdef PPS_SYNC
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void hardpps __P((struct timeval *, long));
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#endif
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#endif
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void initclocks __P((void));
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void inittodr __P((time_t));
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void resettodr __P((void));
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void cpu_initclocks __P((void));
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void startprofclock __P((struct proc *));
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void stopprofclock __P((struct proc *));
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void setstatclockrate __P((int hzrate));
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/*
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* Shutdown hooks. Functions to be run with all interrupts disabled
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* immediately before the system is halted or rebooted.
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*/
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void *shutdownhook_establish __P((void (*)(void *), void *));
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void shutdownhook_disestablish __P((void *));
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void doshutdownhooks __P((void));
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/*
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* Power managment hooks.
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*/
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void *powerhook_establish __P((void (*)(int, void *), void *));
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void powerhook_disestablish __P((void *));
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void dopowerhooks __P((int));
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#define PWR_RESUME 0
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#define PWR_SUSPEND 1
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#define PWR_STANDBY 2
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/*
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* Mountroot hooks. Device drivers establish these to be executed
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* just before (*mountroot)() if the passed device is selected
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* as the root device.
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*/
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void *mountroothook_establish __P((void (*)(struct device *),
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struct device *));
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void mountroothook_disestablish __P((void *));
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void mountroothook_destroy __P((void));
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void domountroothook __P((void));
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/*
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* Exec hooks. Subsystems may want to do cleanup when a process
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* execs.
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*/
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void *exechook_establish __P((void (*)(struct proc *, void *), void *));
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void exechook_disestablish __P((void *));
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void doexechooks __P((struct proc *));
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int uiomove __P((void *, int, struct uio *));
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#ifdef _KERNEL
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caddr_t allocsys __P((caddr_t, caddr_t (*)(caddr_t)));
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#define ALLOCSYS(base, name, type, num) \
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(name) = (type *)(base); (base) = (caddr_t)ALIGN((name)+(num))
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#endif
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#ifdef _KERNEL
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int setjmp __P((label_t *));
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void longjmp __P((label_t *));
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#endif
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void consinit __P((void));
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void cpu_startup __P((void));
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void cpu_configure __P((void));
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void cpu_rootconf __P((void));
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void cpu_dumpconf __P((void));
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#ifdef GPROF
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void kmstartup __P((void));
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#endif
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#ifdef _KERNEL
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#include <lib/libkern/libkern.h>
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#endif
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#ifdef _KERNEL
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#if defined(DDB) || defined(_SUN3_) || defined(_SUN3X_)
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/* note that cpu_Debugger() is always available on sun3/sun3x */
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void cpu_Debugger __P((void));
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#define Debugger cpu_Debugger
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#endif
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#ifdef DDB
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/*
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* Enter debugger(s) from console attention if enabled
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*/
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extern int db_fromconsole; /* XXX ddb/ddbvar.h */
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#define console_debugger() if (db_fromconsole) Debugger()
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#else
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#define console_debugger() do {} while (0) /* NOP */
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#endif
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#endif /* _KERNEL */
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#ifdef SYSCALL_DEBUG
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void scdebug_call __P((struct proc *, register_t, register_t[]));
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void scdebug_ret __P((struct proc *, register_t, int, register_t[]));
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#endif /* SYSCALL_DEBUG */
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#endif /* !_SYS_SYSTM_H_ */
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