/* $OpenBSD: systm.h,v 1.74 2008/05/16 17:45:37 thib Exp $ */ /* $NetBSD: systm.h,v 1.50 1996/06/09 04:55:09 briggs Exp $ */ /*- * 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. 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 8.4 (Berkeley) 2/23/94 */ #ifndef __SYSTM_H__ #define __SYSTM_H__ #include #include /* * 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 permanently insecure mode - always run system in level 0 mode. * 0 insecure mode - immutable and append-only flags may 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. */ extern int securelevel; /* system security level */ extern const char *panicstr; /* panic message */ extern const char version[]; /* system version */ extern const char copyright[]; /* system copyright */ extern const char ostype[]; extern const char osversion[]; extern const char osrelease[]; extern int cold; /* cold start flag initialized in locore */ extern int ncpus; /* number of CPUs */ extern int nblkdev; /* number of entries in bdevsw */ extern int nchrdev; /* number of entries in cdevsw */ extern int selwait; /* select timeout address */ #ifdef MULTIPROCESSOR #define curpriority (curcpu()->ci_schedstate.spc_curpriority) #else extern u_char curpriority; /* priority of current process */ #endif extern int maxmem; /* max memory per process */ extern int physmem; /* physical memory */ extern dev_t dumpdev; /* dump device */ extern long dumplo; /* offset into dumpdev */ extern dev_t rootdev; /* root device */ extern struct vnode *rootvp; /* vnode equivalent to above */ extern dev_t swapdev; /* swapping device */ extern struct vnode *swapdev_vp;/* vnode equivalent to above */ struct proc; typedef int sy_call_t(struct proc *, void *, register_t *); extern struct sysent { /* system call table */ short sy_narg; /* number of args */ short sy_argsize; /* total size of arguments */ int sy_flags; sy_call_t *sy_call; /* implementing function */ } sysent[]; #define SY_MPSAFE 0x01 #define SY_NOLOCK 0x02 #if _BYTE_ORDER == _BIG_ENDIAN #define SCARG(p, k) ((p)->k.be.datum) /* get arg from args pointer */ #elif _BYTE_ORDER == _LITTLE_ENDIAN #define SCARG(p, k) ((p)->k.le.datum) /* get arg from args pointer */ #else #error "what byte order is this machine?" #endif #if defined(_KERNEL) && defined(SYSCALL_DEBUG) void scdebug_call(struct proc *p, register_t code, register_t retval[]); void scdebug_ret(struct proc *p, register_t code, int error, register_t retval[]); #endif /* _KERNEL && SYSCALL_DEBUG */ extern int boothowto; /* reboot flags, from console subsystem */ extern void (*v_putc)(int); /* Virtual console putc routine */ /* * General function declarations. */ int nullop(void *); int enodev(void); int enosys(void); int enoioctl(void); int enxio(void); int eopnotsupp(void *); int lkmenodev(void); struct vnodeopv_desc; void vfs_opv_init_explicit(struct vnodeopv_desc *); void vfs_opv_init_default(struct vnodeopv_desc *); void vfs_op_init(void); int seltrue(dev_t dev, int which, struct proc *); void *hashinit(int, int, int, u_long *); int sys_nosys(struct proc *, void *, register_t *); void panic(const char *, ...) __attribute__((__noreturn__,__format__(__kprintf__,1,2))); void __assert(const char *, const char *, int, const char *) __attribute__((__noreturn__)); int printf(const char *, ...) __attribute__((__format__(__kprintf__,1,2))); void uprintf(const char *, ...) __attribute__((__format__(__kprintf__,1,2))); int vprintf(const char *, va_list); int vsnprintf(char *, size_t, const char *, va_list); int snprintf(char *buf, size_t, const char *, ...) __attribute__((__format__(__kprintf__,3,4))); struct tty; void ttyprintf(struct tty *, const char *, ...) __attribute__((__format__(__kprintf__,2,3))); void splassert_fail(int, int, const char *); extern int splassert_ctl; void tablefull(const char *); int kcopy(const void *, void *, size_t) __attribute__ ((__bounded__(__buffer__,1,3))) __attribute__ ((__bounded__(__buffer__,2,3))); void bcopy(const void *, void *, size_t) __attribute__ ((__bounded__(__buffer__,1,3))) __attribute__ ((__bounded__(__buffer__,2,3))); void ovbcopy(const void *, void *, size_t) __attribute__ ((__bounded__(__buffer__,1,3))) __attribute__ ((__bounded__(__buffer__,2,3))); void bzero(void *, size_t) __attribute__ ((__bounded__(__buffer__,1,2))); int bcmp(const void *, const void *, size_t); void *memcpy(void *, const void *, size_t) __attribute__ ((__bounded__(__buffer__,1,3))) __attribute__ ((__bounded__(__buffer__,2,3))); void *memmove(void *, const void *, size_t) __attribute__ ((__bounded__(__buffer__,1,3))) __attribute__ ((__bounded__(__buffer__,2,3))); void *memset(void *, int, size_t) __attribute__ ((__bounded__(__buffer__,1,3))); int copystr(const void *, void *, size_t, size_t *) __attribute__ ((__bounded__(__string__,2,3))); int copyinstr(const void *, void *, size_t, size_t *) __attribute__ ((__bounded__(__string__,2,3))); int copyoutstr(const void *, void *, size_t, size_t *); int copyin(const void *, void *, size_t) __attribute__ ((__bounded__(__buffer__,2,3))); int copyout(const void *, void *, size_t); struct timeval; int hzto(struct timeval *); int tvtohz(struct timeval *); void realitexpire(void *); struct clockframe; void hardclock(struct clockframe *); void softclock(void); void statclock(struct clockframe *); void initclocks(void); void inittodr(time_t); void resettodr(void); void cpu_initclocks(void); void startprofclock(struct proc *); void stopprofclock(struct proc *); void setstatclockrate(int); void wdog_register(void *, int (*)(void *, int)); /* * Startup/shutdown hooks. Startup hooks are functions running after * the scheduler has started but before any threads have been created * or root has been mounted. The shutdown hooks are functions to be run * with all interrupts disabled immediately before the system is * halted or rebooted. */ struct hook_desc { TAILQ_ENTRY(hook_desc) hd_list; void (*hd_fn)(void *); void *hd_arg; }; TAILQ_HEAD(hook_desc_head, hook_desc); extern struct hook_desc_head shutdownhook_list, startuphook_list, mountroothook_list; void *hook_establish(struct hook_desc_head *, int, void (*)(void *), void *); void hook_disestablish(struct hook_desc_head *, void *); void dohooks(struct hook_desc_head *, int); #define HOOK_REMOVE 0x01 #define HOOK_FREE 0x02 #define startuphook_establish(fn, arg) \ hook_establish(&startuphook_list, 1, (fn), (arg)) #define startuphook_disestablish(vhook) \ hook_disestablish(&startuphook_list, (vhook)) #define dostartuphooks() dohooks(&startuphook_list, HOOK_REMOVE|HOOK_FREE) #define shutdownhook_establish(fn, arg) \ hook_establish(&shutdownhook_list, 0, (fn), (arg)) #define shutdownhook_disestablish(vhook) \ hook_disestablish(&shutdownhook_list, (vhook)) #define doshutdownhooks() dohooks(&shutdownhook_list, HOOK_REMOVE) #define mountroothook_establish(fn, arg) \ hook_establish(&mountroothook_list, 0, (fn), (arg)) #define mountroothook_disestablish(vhook) \ hook_disestablish(&mountroothook_list, (vhook)) #define domountroothooks() dohooks(&mountroothook_list, HOOK_REMOVE|HOOK_FREE) /* * Power management hooks. */ void *powerhook_establish(void (*)(int, void *), void *); void powerhook_disestablish(void *); void dopowerhooks(int); #define PWR_RESUME 0 #define PWR_SUSPEND 1 #define PWR_STANDBY 2 struct uio; int uiomove(void *, int, struct uio *); #if defined(_KERNEL) int setjmp(label_t *); void longjmp(label_t *); #endif void consinit(void); void cpu_startup(void); void cpu_configure(void); void diskconf(void); #ifdef GPROF void kmstartup(void); #endif int nfs_mountroot(void); int dk_mountroot(void); extern int (*mountroot)(void); #include #if defined(DDB) || defined(KGDB) /* debugger entry points */ void Debugger(void); /* in DDB only */ int read_symtab_from_file(struct proc *,struct vnode *,const char *); #endif #ifdef BOOT_CONFIG void user_config(void); #endif #if defined(MULTIPROCESSOR) void _kernel_lock_init(void); void _kernel_lock(void); void _kernel_unlock(void); void _kernel_proc_lock(struct proc *); void _kernel_proc_unlock(struct proc *); #define KERNEL_LOCK_INIT() _kernel_lock_init() #define KERNEL_LOCK() _kernel_lock() #define KERNEL_UNLOCK() _kernel_unlock() #define KERNEL_PROC_LOCK(p) _kernel_proc_lock((p)) #define KERNEL_PROC_UNLOCK(p) _kernel_proc_unlock((p)) #else /* ! MULTIPROCESSOR */ #define KERNEL_LOCK_INIT() /* nothing */ #define KERNEL_LOCK() /* nothing */ #define KERNEL_UNLOCK() /* nothing */ #define KERNEL_PROC_LOCK(p) /* nothing */ #define KERNEL_PROC_UNLOCK(p) /* nothing */ #endif /* MULTIPROCESSOR */ #endif /* __SYSTM_H__ */