systm.h revision 1858
11541Srgrimes/*- 21541Srgrimes * Copyright (c) 1982, 1988, 1991, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * (c) UNIX System Laboratories, Inc. 51541Srgrimes * All or some portions of this file are derived from material licensed 61541Srgrimes * to the University of California by American Telephone and Telegraph 71541Srgrimes * Co. or Unix System Laboratories, Inc. and are reproduced herein with 81541Srgrimes * the permission of UNIX System Laboratories, Inc. 91541Srgrimes * 101541Srgrimes * Redistribution and use in source and binary forms, with or without 111541Srgrimes * modification, are permitted provided that the following conditions 121541Srgrimes * are met: 131541Srgrimes * 1. Redistributions of source code must retain the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer. 151541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161541Srgrimes * notice, this list of conditions and the following disclaimer in the 171541Srgrimes * documentation and/or other materials provided with the distribution. 181541Srgrimes * 3. All advertising materials mentioning features or use of this software 191541Srgrimes * must display the following acknowledgement: 201541Srgrimes * This product includes software developed by the University of 211541Srgrimes * California, Berkeley and its contributors. 221541Srgrimes * 4. Neither the name of the University nor the names of its contributors 231541Srgrimes * may be used to endorse or promote products derived from this software 241541Srgrimes * without specific prior written permission. 251541Srgrimes * 261541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 271541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 281541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 291541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 301541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 311541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 321541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 331541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 341541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 351541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 361541Srgrimes * SUCH DAMAGE. 371541Srgrimes * 381541Srgrimes * @(#)systm.h 8.4 (Berkeley) 2/23/94 391858Sdg * $Id: systm.h,v 1.4 1994/08/04 06:15:10 davidg Exp $ 401541Srgrimes */ 411541Srgrimes 421549Srgrimes#include <machine/cpufunc.h> 431549Srgrimes 441541Srgrimes/* 451541Srgrimes * The `securelevel' variable controls the security level of the system. 461541Srgrimes * It can only be decreased by process 1 (/sbin/init). 471541Srgrimes * 481541Srgrimes * Security levels are as follows: 491541Srgrimes * -1 permannently insecure mode - always run system in level 0 mode. 501541Srgrimes * 0 insecure mode - immutable and append-only flags make be turned off. 511541Srgrimes * All devices may be read or written subject to permission modes. 521541Srgrimes * 1 secure mode - immutable and append-only flags may not be changed; 531541Srgrimes * raw disks of mounted filesystems, /dev/mem, and /dev/kmem are 541541Srgrimes * read-only. 551541Srgrimes * 2 highly secure mode - same as (1) plus raw disks are always 561541Srgrimes * read-only whether mounted or not. This level precludes tampering 571541Srgrimes * with filesystems by unmounting them, but also inhibits running 581541Srgrimes * newfs while the system is secured. 591541Srgrimes * 601541Srgrimes * In normal operation, the system runs in level 0 mode while single user 611541Srgrimes * and in level 1 mode while multiuser. If level 2 mode is desired while 621541Srgrimes * running multiuser, it can be set in the multiuser startup script 631541Srgrimes * (/etc/rc.local) using sysctl(1). If it is desired to run the system 641541Srgrimes * in level 0 mode while multiuser, initialize the variable securelevel 651541Srgrimes * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to 661858Sdg * zero as that would allow the kernel binary to be patched to -1. 671541Srgrimes * Without initialization, securelevel loads in the BSS area which only 681541Srgrimes * comes into existence when the kernel is loaded and hence cannot be 691541Srgrimes * patched by a stalking hacker. 701541Srgrimes */ 711541Srgrimesextern int securelevel; /* system security level */ 721541Srgrimesextern const char *panicstr; /* panic message */ 731541Srgrimesextern char version[]; /* system version */ 741541Srgrimesextern char copyright[]; /* system copyright */ 751541Srgrimes 761541Srgrimesextern int nblkdev; /* number of entries in bdevsw */ 771541Srgrimesextern int nchrdev; /* number of entries in cdevsw */ 781541Srgrimesextern int nswdev; /* number of swap devices */ 791541Srgrimesextern int nswap; /* size of swap space */ 801541Srgrimes 811541Srgrimesextern int selwait; /* select timeout address */ 821541Srgrimes 831541Srgrimesextern u_char curpriority; /* priority of current process */ 841541Srgrimes 851541Srgrimesextern int maxmem; /* max memory per process */ 861541Srgrimesextern int physmem; /* physical memory */ 871541Srgrimes 881541Srgrimesextern dev_t dumpdev; /* dump device */ 891541Srgrimesextern long dumplo; /* offset into dumpdev */ 901541Srgrimes 911541Srgrimesextern dev_t rootdev; /* root device */ 921541Srgrimesextern struct vnode *rootvp; /* vnode equivalent to above */ 931541Srgrimes 941541Srgrimesextern dev_t swapdev; /* swapping device */ 951541Srgrimesextern struct vnode *swapdev_vp;/* vnode equivalent to above */ 961541Srgrimes 971541Srgrimesextern struct sysent { /* system call table */ 981541Srgrimes int sy_narg; /* number of arguments */ 991541Srgrimes int (*sy_call)(); /* implementing function */ 1001541Srgrimes} sysent[]; 1011541Srgrimes 1021541Srgrimesextern int boothowto; /* reboot flags, from console subsystem */ 1031541Srgrimes 1041541Srgrimes/* 1051541Srgrimes * General function declarations. 1061541Srgrimes */ 1071541Srgrimesint nullop __P((void)); 1081541Srgrimesint enodev __P((void)); 1091541Srgrimesint enoioctl __P((void)); 1101541Srgrimesint enxio __P((void)); 1111541Srgrimesint eopnotsupp __P((void)); 1121541Srgrimesint seltrue __P((dev_t dev, int which, struct proc *p)); 1131541Srgrimesvoid *hashinit __P((int count, int type, u_long *hashmask)); 1141541Srgrimes 1151541Srgrimes#ifdef __GNUC__ 1161541Srgrimesvolatile void panic __P((const char *, ...)); 1171541Srgrimes#else 1181541Srgrimesvoid panic __P((const char *, ...)); 1191541Srgrimes#endif 1201541Srgrimesvoid tablefull __P((const char *)); 1211541Srgrimesvoid addlog __P((const char *, ...)); 1221541Srgrimesvoid log __P((int, const char *, ...)); 1231541Srgrimesvoid printf __P((const char *, ...)); 1241541Srgrimesint sprintf __P((char *buf, const char *, ...)); 1251541Srgrimesvoid ttyprintf __P((struct tty *, const char *, ...)); 1261541Srgrimes 1271541Srgrimesvoid bcopy __P((const void *from, void *to, u_int len)); 1281541Srgrimesvoid ovbcopy __P((const void *from, void *to, u_int len)); 1291541Srgrimesvoid bzero __P((void *buf, u_int len)); 1301541Srgrimes 1311541Srgrimesint copystr __P((void *kfaddr, void *kdaddr, u_int len, u_int *done)); 1321541Srgrimesint copyinstr __P((void *udaddr, void *kaddr, u_int len, u_int *done)); 1331541Srgrimesint copyoutstr __P((void *kaddr, void *udaddr, u_int len, u_int *done)); 1341541Srgrimesint copyin __P((void *udaddr, void *kaddr, u_int len)); 1351541Srgrimesint copyout __P((void *kaddr, void *udaddr, u_int len)); 1361541Srgrimes 1371541Srgrimesint fubyte __P((void *base)); 1381541Srgrimes#ifdef notdef 1391541Srgrimesint fuibyte __P((void *base)); 1401541Srgrimes#endif 1411541Srgrimesint subyte __P((void *base, int byte)); 1421541Srgrimesint suibyte __P((void *base, int byte)); 1431541Srgrimesint fuword __P((void *base)); 1441541Srgrimesint fuiword __P((void *base)); 1451541Srgrimesint suword __P((void *base, int word)); 1461541Srgrimesint suiword __P((void *base, int word)); 1471541Srgrimes 1481541Srgrimesint hzto __P((struct timeval *tv)); 1491549Srgrimestypedef void (*timeout_func_t)(void *); 1501541Srgrimesvoid timeout __P((void (*func)(void *), void *arg, int ticks)); 1511541Srgrimesvoid untimeout __P((void (*func)(void *), void *arg)); 1521541Srgrimesvoid realitexpire __P((void *)); 1531541Srgrimes 1541541Srgrimesstruct clockframe; 1551541Srgrimesvoid hardclock __P((struct clockframe *frame)); 1561541Srgrimesvoid softclock __P((void)); 1571541Srgrimesvoid statclock __P((struct clockframe *frame)); 1581541Srgrimes 1591541Srgrimesvoid initclocks __P((void)); 1601541Srgrimes 1611541Srgrimesvoid startprofclock __P((struct proc *)); 1621541Srgrimesvoid stopprofclock __P((struct proc *)); 1631541Srgrimesvoid setstatclockrate __P((int hzrate)); 1641541Srgrimes 1651541Srgrimes#include <libkern/libkern.h> 166