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NetBSD/sys/sys/systm.h

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/* $NetBSD: systm.h,v 1.291 2019/11/15 12:18:46 maxv 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 8.7 (Berkeley) 3/29/95
*/
#ifndef _SYS_SYSTM_H_
#define _SYS_SYSTM_H_
#if defined(_KERNEL_OPT)
#include "opt_ddb.h"
#include "opt_multiprocessor.h"
#include "opt_gprof.h"
#include "opt_kasan.h"
#include "opt_kcsan.h"
#include "opt_kleak.h"
#include "opt_kmsan.h"
#include "opt_wsdisplay_compat.h"
#endif
#if !defined(_KERNEL) && !defined(_STANDALONE)
#include <stdbool.h>
#endif
#include <machine/endian.h>
#include <sys/types.h>
#include <sys/stdarg.h>
#include <sys/device_if.h>
struct clockframe;
struct lwp;
struct proc;
struct sysent;
struct timeval;
struct tty;
struct uio;
struct vnode;
struct vmspace;
extern const char *panicstr; /* panic message */
extern int doing_shutdown; /* shutting down */
extern const char copyright[]; /* system copyright */
extern char machine[]; /* machine type */
extern char machine_arch[]; /* machine architecture */
extern const char osrelease[]; /* short system version */
extern const char ostype[]; /* system type */
extern const char kernel_ident[];/* kernel configuration ID */
extern const char version[]; /* system version */
extern const char buildinfo[]; /* information from build environment */
extern int autonicetime; /* time (in seconds) before autoniceval */
extern int autoniceval; /* proc priority after autonicetime */
extern int selwait; /* select timeout address */
extern int maxmem; /* max memory per process */
extern psize_t physmem; /* physical memory */
extern dev_t dumpdev; /* dump device */
extern dev_t dumpcdev; /* dump device (character equivalent) */
extern long dumplo; /* offset into dumpdev */
extern int dumpsize; /* size of dump in pages */
extern const char *dumpspec; /* how dump device was specified */
extern dev_t rootdev; /* root device */
extern struct vnode *rootvp; /* vnode equivalent to above */
extern device_t root_device; /* device equivalent to above */
extern const char *rootspec; /* how root device was specified */
extern int ncpu; /* number of CPUs configured */
extern int ncpuonline; /* number of CPUs online */
#if defined(_KERNEL)
extern bool mp_online; /* secondary processors are started */
#endif /* defined(_KERNEL) */
extern const char hexdigits[]; /* "0123456789abcdef" in subr_prf.c */
extern const char HEXDIGITS[]; /* "0123456789ABCDEF" in subr_prf.c */
/*
* These represent the swap pseudo-device (`sw'). This device
* is used by the swap pager to indirect through the routines
* in sys/vm/vm_swap.c.
*/
extern const dev_t swapdev; /* swapping device */
extern struct vnode *swapdev_vp;/* vnode equivalent to above */
extern const dev_t zerodev; /* /dev/zero */
#if defined(_KERNEL)
typedef int sy_call_t(struct lwp *, const 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; /* flags. see below */
sy_call_t *sy_call; /* implementing function */
uint32_t sy_entry; /* DTrace entry ID for systrace. */
uint32_t sy_return; /* DTrace return ID for systrace. */
} sysent[];
extern int nsysent;
extern const uint32_t sysent_nomodbits[];
#endif
#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
#define SYCALL_INDIRECT 0x0000002 /* indirect (ie syscall() or __syscall()) */
#define SYCALL_NARGS64_MASK 0x000f000 /* count of 64bit args */
#define SYCALL_RET_64 0x0010000 /* retval is a 64bit integer value */
#define SYCALL_ARG0_64 0x0020000
#define SYCALL_ARG1_64 0x0040000
#define SYCALL_ARG2_64 0x0080000
#define SYCALL_ARG3_64 0x0100000
#define SYCALL_ARG4_64 0x0200000
#define SYCALL_ARG5_64 0x0400000
#define SYCALL_ARG6_64 0x0800000
#define SYCALL_ARG7_64 0x1000000
#define SYCALL_NOSYS 0x2000000 /* permanent nosys in sysent[] */
#define SYCALL_ARG_PTR 0x4000000 /* at least one argument is a pointer */
#define SYCALL_RET_64_P(sy) ((sy)->sy_flags & SYCALL_RET_64)
#define SYCALL_ARG_64_P(sy, n) ((sy)->sy_flags & (SYCALL_ARG0_64 << (n)))
#define SYCALL_ARG_64_MASK(sy) (((sy)->sy_flags >> 17) & 0xff)
#define SYCALL_ARG_PTR_P(sy) ((sy)->sy_flags & SYCALL_ARG_PTR)
#define SYCALL_NARGS64(sy) (((sy)->sy_flags >> 12) & 0x0f)
#define SYCALL_NARGS64_VAL(n) ((n) << 12)
extern int boothowto; /* reboot flags, from console subsystem */
#define bootverbose (boothowto & AB_VERBOSE)
#define bootquiet (boothowto & AB_QUIET)
extern void (*v_putc)(int); /* Virtual console putc routine */
/*
* General function declarations.
*/
void voidop(void);
int nullop(void *);
void* nullret(void);
int enodev(void);
int enosys(void);
int enoioctl(void);
int enxio(void);
int eopnotsupp(void);
enum hashtype {
HASH_LIST,
HASH_SLIST,
HASH_TAILQ,
HASH_PSLIST
};
#ifdef _KERNEL
#define COND_SET_VALUE(dst, src, allow) \
do { \
if (allow) \
dst = src; \
} while (/*CONSTCOND*/0);
bool get_expose_address(struct proc *);
void *hashinit(u_int, enum hashtype, bool, u_long *);
void hashdone(void *, enum hashtype, u_long);
int seltrue(dev_t, int, struct lwp *);
int sys_nosys(struct lwp *, const void *, register_t *);
int sys_nomodule(struct lwp *, const void *, register_t *);
void aprint_normal(const char *, ...) __printflike(1, 2);
void aprint_error(const char *, ...) __printflike(1, 2);
void aprint_naive(const char *, ...) __printflike(1, 2);
void aprint_verbose(const char *, ...) __printflike(1, 2);
void aprint_debug(const char *, ...) __printflike(1, 2);
void aprint_normal_dev(device_t, const char *, ...) __printflike(2, 3);
void aprint_error_dev(device_t, const char *, ...) __printflike(2, 3);
void aprint_naive_dev(device_t, const char *, ...) __printflike(2, 3);
void aprint_verbose_dev(device_t, const char *, ...) __printflike(2, 3);
void aprint_debug_dev(device_t, const char *, ...) __printflike(2, 3);
void device_printf(device_t, const char *fmt, ...) __printflike(2, 3);
struct ifnet;
void aprint_normal_ifnet(struct ifnet *, const char *, ...)
__printflike(2, 3);
void aprint_error_ifnet(struct ifnet *, const char *, ...)
__printflike(2, 3);
void aprint_naive_ifnet(struct ifnet *, const char *, ...)
__printflike(2, 3);
void aprint_verbose_ifnet(struct ifnet *, const char *, ...)
__printflike(2, 3);
void aprint_debug_ifnet(struct ifnet *, const char *, ...)
__printflike(2, 3);
int aprint_get_error_count(void);
void printf_tolog(const char *, ...) __printflike(1, 2);
void printf_nolog(const char *, ...) __printflike(1, 2);
void printf(const char *, ...) __printflike(1, 2);
int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
int vasprintf(char **, const char *, va_list) __printflike(2, 0);
void vprintf(const char *, va_list) __printflike(1, 0);
int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0);
void vprintf_flags(int, const char *, va_list) __printflike(2, 0);
void printf_flags(int, const char *, ...) __printflike(2, 3);
int humanize_number(char *, size_t, uint64_t, const char *, int);
void twiddle(void);
void banner(void);
#endif /* _KERNEL */
void panic(const char *, ...) __dead __printflike(1, 2);
void vpanic(const char *, va_list) __dead __printflike(1, 0);
void uprintf(const char *, ...) __printflike(1, 2);
void uprintf_locked(const char *, ...) __printflike(1, 2);
void ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
int format_bytes(char *, size_t, uint64_t);
void tablefull(const char *, const char *);
#if defined(_KERNEL) && defined(KASAN)
int kasan_kcopy(const void *, void *, size_t);
#define kcopy kasan_kcopy
#elif defined(_KERNEL) && defined(KCSAN)
int kcsan_kcopy(const void *, void *, size_t);
#define kcopy kcsan_kcopy
#elif defined(_KERNEL) && defined(KMSAN)
int kmsan_kcopy(const void *, void *, size_t);
#define kcopy kmsan_kcopy
#else
int kcopy(const void *, void *, size_t);
#endif
#ifdef _KERNEL
#define bcopy(src, dst, len) memcpy((dst), (src), (len))
#define bzero(src, len) memset((src), 0, (len))
#define bcmp(a, b, len) memcmp((a), (b), (len))
#endif /* KERNEL */
#if defined(_KERNEL) && defined(KASAN)
int kasan_copystr(const void *, void *, size_t, size_t *);
int kasan_copyinstr(const void *, void *, size_t, size_t *);
int kasan_copyoutstr(const void *, void *, size_t, size_t *);
int kasan_copyin(const void *, void *, size_t);
int copyout(const void *, void *, size_t);
#define copystr kasan_copystr
#define copyinstr kasan_copyinstr
#define copyoutstr kasan_copyoutstr
#define copyin kasan_copyin
#elif defined(_KERNEL) && defined(KCSAN)
int kcsan_copystr(const void *, void *, size_t, size_t *);
int kcsan_copyinstr(const void *, void *, size_t, size_t *);
int kcsan_copyoutstr(const void *, void *, size_t, size_t *);
int kcsan_copyin(const void *, void *, size_t);
int kcsan_copyout(const void *, void *, size_t);
#define copystr kcsan_copystr
#define copyinstr kcsan_copyinstr
#define copyoutstr kcsan_copyoutstr
#define copyin kcsan_copyin
#define copyout kcsan_copyout
#elif defined(_KERNEL) && defined(KMSAN)
int kmsan_copystr(const void *, void *, size_t, size_t *);
int kmsan_copyinstr(const void *, void *, size_t, size_t *);
int kmsan_copyoutstr(const void *, void *, size_t, size_t *);
int kmsan_copyin(const void *, void *, size_t);
int kmsan_copyout(const void *, void *, size_t);
#define copystr kmsan_copystr
#define copyinstr kmsan_copyinstr
#define copyoutstr kmsan_copyoutstr
#define copyin kmsan_copyin
#define copyout kmsan_copyout
#else
int copystr(const void *, void *, size_t, size_t *);
int copyinstr(const void *, void *, size_t, size_t *);
int copyoutstr(const void *, void *, size_t, size_t *);
int copyin(const void *, void *, size_t);
int copyout(const void *, void *, size_t);
#endif
#ifdef KLEAK
#define copyout kleak_copyout
#define copyoutstr kleak_copyoutstr
int kleak_copyout(const void *, void *, size_t);
int kleak_copyoutstr(const void *, void *, size_t, size_t *);
void kleak_fill_area(void *, size_t);
void kleak_fill_stack(void);
#else
#define kleak_fill_area(a, b) __nothing
#define kleak_fill_stack() __nothing
#endif
#ifdef _KERNEL
typedef int (*copyin_t)(const void *, void *, size_t);
typedef int (*copyout_t)(const void *, void *, size_t);
#endif
int copyin_proc(struct proc *, const void *, void *, size_t);
int copyout_proc(struct proc *, const void *, void *, size_t);
int copyin_pid(pid_t, const void *, void *, size_t);
int copyin_vmspace(struct vmspace *, const void *, void *, size_t);
int copyout_vmspace(struct vmspace *, const void *, void *, size_t);
int ioctl_copyin(int ioctlflags, const void *src, void *dst, size_t len);
int ioctl_copyout(int ioctlflags, const void *src, void *dst, size_t len);
int ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
#ifdef _LP64
int ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
#endif
int ucas_ptr(volatile void *, void *, void *, void *);
int ucas_int(volatile unsigned int *, unsigned int, unsigned int,
unsigned int *);
int ufetch_8(const uint8_t *, uint8_t *);
int ufetch_16(const uint16_t *, uint16_t *);
int ufetch_32(const uint32_t *, uint32_t *);
#ifdef _LP64
int ufetch_64(const uint64_t *, uint64_t *);
#endif
int ufetch_char(const unsigned char *, unsigned char *);
int ufetch_short(const unsigned short *, unsigned short *);
int ufetch_int(const unsigned int *, unsigned int *);
int ufetch_long(const unsigned long *, unsigned long *);
int ufetch_ptr(const void **, void **);
int ustore_8(uint8_t *, uint8_t);
int ustore_16(uint16_t *, uint16_t);
int ustore_32(uint32_t *, uint32_t);
#ifdef _LP64
int ustore_64(uint64_t *, uint64_t);
#endif
int ustore_char(unsigned char *, unsigned char);
int ustore_short(unsigned short *, unsigned short);
int ustore_int(unsigned int *, unsigned int);
int ustore_long(unsigned long *, unsigned long);
int ustore_ptr(void **, void *);
#ifdef __UCAS_PRIVATE
#if defined(KASAN)
int kasan__ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
#ifdef __HAVE_UCAS_MP
int kasan__ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
#endif /* __HAVE_UCAS_MP */
#ifdef _LP64
int kasan__ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
#ifdef __HAVE_UCAS_MP
int kasan__ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
#endif /* __HAVE_UCAS_MP */
#endif /* _LP64 */
#define _ucas_32 kasan__ucas_32
#define _ucas_32_mp kasan__ucas_32_mp
#define _ucas_64 kasan__ucas_64
#define _ucas_64_mp kasan__ucas_64_mp
#elif defined(KMSAN)
int kmsan__ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
#ifdef __HAVE_UCAS_MP
int kmsan__ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
#endif /* __HAVE_UCAS_MP */
#ifdef _LP64
int kmsan__ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
#ifdef __HAVE_UCAS_MP
int kmsan__ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
#endif /* __HAVE_UCAS_MP */
#endif /* _LP64 */
#define _ucas_32 kmsan__ucas_32
#define _ucas_32_mp kmsan__ucas_32_mp
#define _ucas_64 kmsan__ucas_64
#define _ucas_64_mp kmsan__ucas_64_mp
#else
int _ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
#ifdef __HAVE_UCAS_MP
int _ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *);
#endif /* __HAVE_UCAS_MP */
#ifdef _LP64
int _ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
#ifdef __HAVE_UCAS_MP
int _ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *);
#endif /* __HAVE_UCAS_MP */
#endif /* _LP64 */
#endif
#endif /* __UCAS_PRIVATE */
#ifdef __UFETCHSTORE_PRIVATE
#if defined(KASAN)
int kasan__ufetch_8(const uint8_t *, uint8_t *);
int kasan__ufetch_16(const uint16_t *, uint16_t *);
int kasan__ufetch_32(const uint32_t *, uint32_t *);
#ifdef _LP64
int kasan__ufetch_64(const uint64_t *, uint64_t *);
#endif
int _ustore_8(uint8_t *, uint8_t);
int _ustore_16(uint16_t *, uint16_t);
int _ustore_32(uint32_t *, uint32_t);
#ifdef _LP64
int _ustore_64(uint64_t *, uint64_t);
#endif
#define _ufetch_8 kasan__ufetch_8
#define _ufetch_16 kasan__ufetch_16
#define _ufetch_32 kasan__ufetch_32
#define _ufetch_64 kasan__ufetch_64
#elif defined(KMSAN)
int kmsan__ufetch_8(const uint8_t *, uint8_t *);
int kmsan__ufetch_16(const uint16_t *, uint16_t *);
int kmsan__ufetch_32(const uint32_t *, uint32_t *);
#ifdef _LP64
int kmsan__ufetch_64(const uint64_t *, uint64_t *);
#endif
int kmsan__ustore_8(uint8_t *, uint8_t);
int kmsan__ustore_16(uint16_t *, uint16_t);
int kmsan__ustore_32(uint32_t *, uint32_t);
#ifdef _LP64
int kmsan__ustore_64(uint64_t *, uint64_t);
#endif
#define _ufetch_8 kmsan__ufetch_8
#define _ufetch_16 kmsan__ufetch_16
#define _ufetch_32 kmsan__ufetch_32
#define _ufetch_64 kmsan__ufetch_64
#define _ustore_8 kmsan__ustore_8
#define _ustore_16 kmsan__ustore_16
#define _ustore_32 kmsan__ustore_32
#define _ustore_64 kmsan__ustore_64
#else
int _ufetch_8(const uint8_t *, uint8_t *);
int _ufetch_16(const uint16_t *, uint16_t *);
int _ufetch_32(const uint32_t *, uint32_t *);
#ifdef _LP64
int _ufetch_64(const uint64_t *, uint64_t *);
#endif
int _ustore_8(uint8_t *, uint8_t);
int _ustore_16(uint16_t *, uint16_t);
int _ustore_32(uint32_t *, uint32_t);
#ifdef _LP64
int _ustore_64(uint64_t *, uint64_t);
#endif
#endif
#endif /* __UFETCHSTORE_PRIVATE */
void hardclock(struct clockframe *);
void softclock(void *);
void statclock(struct clockframe *);
#ifdef NTP
void ntp_init(void);
#ifdef PPS_SYNC
struct timespec;
void hardpps(struct timespec *, long);
#endif /* PPS_SYNC */
#else
void ntp_init(void); /* also provides adjtime() functionality */
#endif /* NTP */
void ssp_init(void);
void initclocks(void);
void inittodr(time_t);
void resettodr(void);
void cpu_initclocks(void);
void setrootfstime(time_t);
void startprofclock(struct proc *);
void stopprofclock(struct proc *);
void proftick(struct clockframe *);
void setstatclockrate(int);
/*
* Critical polling hooks. Functions to be run while the kernel stays
* elevated IPL for a "long" time. (watchdogs).
*/
void *critpollhook_establish(void (*)(void *), void *);
void critpollhook_disestablish(void *);
void docritpollhooks(void);
/*
* Shutdown hooks. Functions to be run with all interrupts disabled
* immediately before the system is halted or rebooted.
*/
void *shutdownhook_establish(void (*)(void *), void *);
void shutdownhook_disestablish(void *);
void doshutdownhooks(void);
/*
* Power management hooks.
*/
void *powerhook_establish(const char *, void (*)(int, void *), void *);
void powerhook_disestablish(void *);
void dopowerhooks(int);
#define PWR_RESUME 0
#define PWR_SUSPEND 1
#define PWR_STANDBY 2
#define PWR_SOFTRESUME 3
#define PWR_SOFTSUSPEND 4
#define PWR_SOFTSTANDBY 5
#define PWR_NAMES \
"resume", /* 0 */ \
"suspend", /* 1 */ \
"standby", /* 2 */ \
"softresume", /* 3 */ \
"softsuspend", /* 4 */ \
"softstandby" /* 5 */
/*
* Mountroot hooks (and mountroot declaration). Device drivers establish
* these to be executed just before (*mountroot)() if the passed device is
* selected as the root device.
*/
#define ROOT_FSTYPE_ANY "?"
extern const char *rootfstype;
void *mountroothook_establish(void (*)(device_t), device_t);
void mountroothook_disestablish(void *);
void mountroothook_destroy(void);
void domountroothook(device_t);
/*
* Exec hooks. Subsystems may want to do cleanup when a process
* execs.
*/
void *exechook_establish(void (*)(struct proc *, void *), void *);
void exechook_disestablish(void *);
void doexechooks(struct proc *);
/*
* Exit hooks. Subsystems may want to do cleanup when a process exits.
*/
void *exithook_establish(void (*)(struct proc *, void *), void *);
void exithook_disestablish(void *);
void doexithooks(struct proc *);
/*
* Fork hooks. Subsystems may want to do special processing when a process
* forks.
*/
void *forkhook_establish(void (*)(struct proc *, struct proc *));
void forkhook_disestablish(void *);
void doforkhooks(struct proc *, struct proc *);
/*
* kernel syscall tracing/debugging hooks.
*/
#ifdef _KERNEL
bool trace_is_enabled(struct proc *);
int trace_enter(register_t, const struct sysent *, const void *);
void trace_exit(register_t, const struct sysent *, const void *,
register_t [], int);
#endif
int uiomove(void *, size_t, struct uio *);
int uiomove_frombuf(void *, size_t, struct uio *);
#ifdef _KERNEL
int setjmp(label_t *) __returns_twice;
void longjmp(label_t *) __dead;
#endif
void consinit(void);
void cpu_startup(void);
void cpu_configure(void);
void cpu_bootconf(void);
void cpu_rootconf(void);
void cpu_dumpconf(void);
#ifdef GPROF
void kmstartup(void);
#endif
void machdep_init(void);
#ifdef _KERNEL
#include <lib/libkern/libkern.h>
/*
* Stuff to handle debugger magic key sequences.
*/
#define CNS_LEN 128
#define CNS_MAGIC_VAL(x) ((x)&0x1ff)
#define CNS_MAGIC_NEXT(x) (((x)>>9)&0x7f)
#define CNS_TERM 0x7f /* End of sequence */
typedef struct cnm_state {
int cnm_state;
u_short *cnm_magic;
} cnm_state_t;
/* Override db_console() in MD headers */
#ifndef cn_trap
#define cn_trap() console_debugger()
#endif
#ifndef cn_isconsole
#ifndef WSDISPLAY_MULTICONS
#define cn_isconsole(d) (cn_tab != NULL && (d) == cn_tab->cn_dev)
#else
bool wsdisplay_cn_isconsole(dev_t);
#define cn_isconsole(d) wsdisplay_cn_isconsole(d)
#endif
#endif
void cn_init_magic(cnm_state_t *);
void cn_destroy_magic(cnm_state_t *);
int cn_set_magic(const char *);
int cn_get_magic(char *, size_t);
/* This should be called for each byte read */
#ifndef cn_check_magic
#define cn_check_magic(d, k, s) \
do { \
if (cn_isconsole(d)) { \
int _v = (s).cnm_magic[(s).cnm_state]; \
if ((k) == CNS_MAGIC_VAL(_v)) { \
(s).cnm_state = CNS_MAGIC_NEXT(_v); \
if ((s).cnm_state == CNS_TERM) { \
cn_trap(); \
(s).cnm_state = 0; \
} \
} else { \
(s).cnm_state = 0; \
} \
} \
} while (/* CONSTCOND */ 0)
#endif
/* Encode out-of-band events this way when passing to cn_check_magic() */
#define CNC_BREAK 0x100
#if defined(DDB) || defined(sun3) || defined(sun2)
/* note that cpu_Debugger() is always available on sun[23] */
void cpu_Debugger(void);
#define Debugger cpu_Debugger
#endif
#ifdef DDB
/*
* Enter debugger(s) from console attention if enabled
*/
extern int db_fromconsole; /* XXX ddb/ddbvar.h */
#define console_debugger() if (db_fromconsole) Debugger()
#elif defined(Debugger)
#define console_debugger() Debugger()
#else
#define console_debugger() do {} while (/* CONSTCOND */ 0) /* NOP */
#endif
/* For SYSCALL_DEBUG */
void scdebug_init(void);
void scdebug_call(register_t, const register_t[]);
void scdebug_ret(register_t, int, const register_t[]);
void kernel_lock_init(void);
void _kernel_lock(int);
void _kernel_unlock(int, int *);
bool _kernel_locked_p(void);
void kernconfig_lock_init(void);
void kernconfig_lock(void);
void kernconfig_unlock(void);
bool kernconfig_is_held(void);
#endif
#if defined(MULTIPROCESSOR) || defined(_MODULE)
#define KERNEL_LOCK(count, lwp) \
do { \
if ((count) != 0) \
_kernel_lock((count)); \
} while (/* CONSTCOND */ 0)
#define KERNEL_UNLOCK(all, lwp, p) _kernel_unlock((all), (p))
#define KERNEL_LOCKED_P() _kernel_locked_p()
#else
#define KERNEL_LOCK(count, lwp) do {(void)(count); (void)(lwp);} while (/* CONSTCOND */ 0) /*NOP*/
#define KERNEL_UNLOCK(all, lwp, ptr) do {(void)(all); (void)(lwp); (void)(ptr);} while (/* CONSTCOND */ 0) /*NOP*/
#define KERNEL_LOCKED_P() (true)
#endif
#define KERNEL_UNLOCK_LAST(l) KERNEL_UNLOCK(-1, (l), NULL)
#define KERNEL_UNLOCK_ALL(l, p) KERNEL_UNLOCK(0, (l), (p))
#define KERNEL_UNLOCK_ONE(l) KERNEL_UNLOCK(1, (l), NULL)
#ifdef _KERNEL
/* Preemption control. */
void kpreempt_disable(void);
void kpreempt_enable(void);
bool kpreempt_disabled(void);
vaddr_t calc_cache_size(vsize_t , int, int);
#endif
void assert_sleepable(void);
#if defined(DEBUG)
#define ASSERT_SLEEPABLE() assert_sleepable()
#else /* defined(DEBUG) */
#define ASSERT_SLEEPABLE() do {} while (0)
#endif /* defined(DEBUG) */
#endif /* !_SYS_SYSTM_H_ */
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