155 lines
4.3 KiB
C
155 lines
4.3 KiB
C
/* $OpenBSD: kern_xxx.c,v 1.41 2022/12/05 23:18:37 deraadt Exp $ */
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/* $NetBSD: kern_xxx.c,v 1.32 1996/04/22 01:38:41 christos Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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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. 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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* @(#)kern_xxx.c 8.2 (Berkeley) 11/14/93
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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int rebooting = 0;
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int
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sys_reboot(struct proc *p, void *v, register_t *retval)
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{
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struct sys_reboot_args /* {
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syscallarg(int) opt;
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} */ *uap = v;
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int error;
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if ((error = suser(p)) != 0)
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return (error);
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#ifdef MULTIPROCESSOR
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sched_stop_secondary_cpus();
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KASSERT(CPU_IS_PRIMARY(curcpu()));
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#endif
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reboot(SCARG(uap, opt));
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/* NOTREACHED */
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return (0);
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}
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__dead void
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reboot(int howto)
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{
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KASSERT((howto & RB_NOSYNC) || curproc != NULL);
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stop_periodic_resettodr();
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rebooting = 1;
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boot(howto);
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/* NOTREACHED */
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}
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#if !defined(NO_PROPOLICE) && !defined(_RET_PROTECTOR)
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void __stack_smash_handler(char [], int __attribute__((unused)));
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void
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__stack_smash_handler(char func[], int damaged)
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{
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panic("smashed stack in %s", func);
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}
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#endif
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#ifdef SYSCALL_DEBUG
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#include <sys/proc.h>
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#include <sys/syscall.h>
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#define SCDEBUG_CALLS 0x0001 /* show calls */
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#define SCDEBUG_RETURNS 0x0002 /* show returns */
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#define SCDEBUG_ALL 0x0004 /* even syscalls that are implemented */
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#define SCDEBUG_SHOWARGS 0x0008 /* show arguments to calls */
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int scdebug = SCDEBUG_CALLS|SCDEBUG_RETURNS|SCDEBUG_SHOWARGS;
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extern const char *const syscallnames[];
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void
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scdebug_call(struct proc *p, register_t code, const register_t args[])
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{
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struct process *pr;
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int i;
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if (!(scdebug & SCDEBUG_CALLS))
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return;
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if (!(scdebug & SCDEBUG_ALL || code < 0 || code >= SYS_MAXSYSCALL ||
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sysent[code].sy_call == sys_nosys))
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return;
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pr = p->p_p;
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printf("proc %d (%s): num ", pr->ps_pid, pr->ps_comm);
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if (code < 0 || code >= SYS_MAXSYSCALL)
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printf("OUT OF RANGE (%ld)", code);
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else {
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printf("%ld call: %s", code, syscallnames[code]);
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if (scdebug & SCDEBUG_SHOWARGS) {
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printf("(");
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for (i = 0; i < sysent[code].sy_argsize / sizeof(register_t);
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i++)
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printf("%s0x%lx", i == 0 ? "" : ", ", args[i]);
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printf(")");
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}
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}
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printf("\n");
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}
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void
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scdebug_ret(struct proc *p, register_t code, int error,
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const register_t retval[])
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{
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struct process *pr;
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if (!(scdebug & SCDEBUG_RETURNS))
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return;
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if (!(scdebug & SCDEBUG_ALL || code < 0 || code >= SYS_MAXSYSCALL ||
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sysent[code].sy_call == sys_nosys))
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return;
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pr = p->p_p;
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printf("proc %d (%s): num ", pr->ps_pid, pr->ps_comm);
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if (code < 0 || code >= SYS_MAXSYSCALL)
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printf("OUT OF RANGE (%ld)", code);
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else if (code == SYS_lseek)
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printf("%ld ret: err = %d, rv = 0x%llx", code,
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error, *(off_t *)retval);
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else
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printf("%ld ret: err = %d, rv = 0x%lx", code,
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error, *retval);
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printf("\n");
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}
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#endif /* SYSCALL_DEBUG */
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