diff options
Diffstat (limited to 'sys/sys/systm.h')
| -rw-r--r-- | sys/sys/systm.h | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/sys/sys/systm.h b/sys/sys/systm.h new file mode 100644 index 0000000..5dec672 --- /dev/null +++ b/sys/sys/systm.h @@ -0,0 +1,409 @@ +/* $OpenBSD: systm.h,v 1.145 2020/03/20 03:37:08 cheloha 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 <sys/queue.h> +#include <sys/stdarg.h> + +/* + * 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 *faultstr; /* fault 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 db_active; /* running currently inside ddb(4) */ + +extern int ncpus; /* number of CPUs used */ +extern int ncpusfound; /* number of CPUs found */ +extern int nblkdev; /* number of entries in bdevsw */ +extern int nchrdev; /* number of entries in cdevsw */ + +extern int selwait; /* select timeout address */ +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 u_char bootduid[8]; /* boot device disklabel uid */ +extern u_char rootduid[8]; /* root device disklabel uid */ +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; +struct process; +#define curproc curcpu()->ci_curproc + +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_NOLOCK 0x01 + +#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, const register_t retval[]); +void scdebug_ret(struct proc *p, register_t code, int error, + const 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 *); + +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 *); +int selfalse(dev_t dev, int which, struct proc *); +void *hashinit(int, int, int, u_long *); +void hashfree(void *, int, int); +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) + __attribute__((__format__(__kprintf__,1,0))); +int vsnprintf(char *, size_t, const char *, va_list) + __attribute__((__format__(__kprintf__,3,0))); +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 assertwaitok(void); + +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 bzero(void *, size_t) + __attribute__ ((__bounded__(__buffer__,1,2))); +void explicit_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); +int copyin32(const uint32_t *, uint32_t *); + +struct arc4random_ctx; +void arc4random_buf(void *, size_t) + __attribute__ ((__bounded__(__buffer__,1,2))); +struct arc4random_ctx *arc4random_ctx_new(void); +void arc4random_ctx_free(struct arc4random_ctx *); +void arc4random_ctx_buf(struct arc4random_ctx *, void *, size_t); +u_int32_t arc4random(void); +u_int32_t arc4random_uniform(u_int32_t); + +struct timeval; +struct timespec; +int tvtohz(const struct timeval *); +int tstohz(const struct timespec *); +void realitexpire(void *); + +struct clockframe; +void hardclock(struct clockframe *); +void statclock(struct clockframe *); + +void initclocks(void); +void inittodr(time_t); +void resettodr(void); +void cpu_initclocks(void); + +void startprofclock(struct process *); +void stopprofclock(struct process *); +void setstatclockrate(int); + +void start_periodic_resettodr(void); +void stop_periodic_resettodr(void); + +struct sleep_state; +void sleep_setup(struct sleep_state *, const volatile void *, int, + const char *); +void sleep_setup_timeout(struct sleep_state *, int); +void sleep_setup_signal(struct sleep_state *); +void sleep_finish(struct sleep_state *, int); +int sleep_finish_timeout(struct sleep_state *); +int sleep_finish_signal(struct sleep_state *); +int sleep_finish_all(struct sleep_state *, int); +void sleep_queue_init(void); + +struct cond; +void cond_init(struct cond *); +void cond_wait(struct cond *, const char *); +void cond_signal(struct cond *); + +#define INFSLP UINT64_MAX +#define MAXTSLP (UINT64_MAX - 1) + +struct mutex; +struct rwlock; +void wakeup_n(const volatile void *, int); +void wakeup(const volatile void *); +#define wakeup_one(c) wakeup_n((c), 1) +int tsleep(const volatile void *, int, const char *, int); +int tsleep_nsec(const volatile void *, int, const char *, uint64_t); +int msleep(const volatile void *, struct mutex *, int, const char*, int); +int msleep_nsec(const volatile void *, struct mutex *, int, const char*, + uint64_t); +int rwsleep(const volatile void *, struct rwlock *, int, const char *, int); +int rwsleep_nsec(const volatile void *, struct rwlock *, int, const char *, + uint64_t); +void yield(void); + +void wdog_register(int (*)(void *, int), void *); +void wdog_shutdown(void *); + +/* + * Startup hooks are functions running after the scheduler has started + * but before any threads have been created or root has been mounted. + */ + +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 startuphook_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) + +struct uio; +int uiomove(void *, size_t, struct uio *); + +#if defined(_KERNEL) + +#include <sys/rwlock.h> + +extern struct rwlock netlock; + +#define NET_LOCK() NET_WLOCK() +#define NET_UNLOCK() NET_WUNLOCK() +#define NET_ASSERT_UNLOCKED() NET_ASSERT_WUNLOCKED() + + +#define NET_WLOCK() do { rw_enter_write(&netlock); } while (0) +#define NET_WUNLOCK() do { rw_exit_write(&netlock); } while (0) + +#define NET_ASSERT_WLOCKED() \ +do { \ + int _s = rw_status(&netlock); \ + if ((splassert_ctl > 0) && (_s != RW_WRITE)) \ + splassert_fail(RW_WRITE, _s, __func__); \ +} while (0) + +#define NET_ASSERT_WUNLOCKED() \ +do { \ + int _s = rw_status(&netlock); \ + if ((splassert_ctl > 0) && (_s == RW_WRITE)) \ + splassert_fail(0, RW_WRITE, __func__); \ +} while (0) + +#define NET_RLOCK() do { rw_enter_read(&netlock); } while (0) +#define NET_RUNLOCK() do { rw_exit_read(&netlock); } while (0) + +#define NET_ASSERT_LOCKED() \ +do { \ + int _s = rw_status(&netlock); \ + if ((splassert_ctl > 0) && (_s != RW_WRITE && _s != RW_READ)) \ + splassert_fail(RW_READ, _s, __func__); \ +} while (0) + +__returns_twice int setjmp(label_t *); +__dead void longjmp(label_t *); +#endif + +void consinit(void); + +void cpu_startup(void); +void cpu_configure(void); +void diskconf(void); + +int nfs_mountroot(void); +int dk_mountroot(void); +extern int (*mountroot)(void); + +#include <lib/libkern/libkern.h> + +#define bzero(b, n) __builtin_bzero((b), (n)) +#define memcmp(b1, b2, n) __builtin_memcmp((b1), (b2), (n)) +#define memcpy(d, s, n) __builtin_memcpy((d), (s), (n)) +#define memset(b, c, n) __builtin_memset((b), (c), (n)) +#if (defined(__GNUC__) && __GNUC__ >= 4) +#define memmove(d, s, n) __builtin_memmove((d), (s), (n)) +#endif +#if !defined(__clang__) && (defined(__GNUC__) && __GNUC__ >= 4) +#define bcmp(b1, b2, n) __builtin_bcmp((b1), (b2), (n)) +#define bcopy(s, d, n) __builtin_bcopy((s), (d), (n)) +#endif + +#if defined(DDB) +/* debugger entry points */ +void db_enter(void); /* in DDB only */ +#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); +int _kernel_lock_held(void); + +#define KERNEL_LOCK_INIT() _kernel_lock_init() +#define KERNEL_LOCK() _kernel_lock() +#define KERNEL_UNLOCK() _kernel_unlock() +#define KERNEL_ASSERT_LOCKED() KASSERT(_kernel_lock_held()) +#define KERNEL_ASSERT_UNLOCKED() KASSERT(!_kernel_lock_held()) + +#else /* ! MULTIPROCESSOR */ + +#define KERNEL_LOCK_INIT() /* nothing */ +#define KERNEL_LOCK() /* nothing */ +#define KERNEL_UNLOCK() /* nothing */ +#define KERNEL_ASSERT_LOCKED() /* nothing */ +#define KERNEL_ASSERT_UNLOCKED() /* nothing */ + +#endif /* MULTIPROCESSOR */ + +#endif /* __SYSTM_H__ */ |