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/* $OpenBSD: kern_xxx.c,v 1.15 2010/01/09 02:44:17 kettenis Exp $ */
/* $NetBSD: kern_xxx.c,v 1.32 1996/04/22 01:38:41 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*
* @(#)kern_xxx.c 8.2 (Berkeley) 11/14/93
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <net/if.h>
/* ARGSUSED */
int
sys_reboot(struct proc *p, void *v, register_t *retval)
{
struct sys_reboot_args /* {
syscallarg(int) opt;
} */ *uap = v;
CPU_INFO_ITERATOR cii;
struct cpu_info *ci;
int error;
if ((error = suser(p, 0)) != 0)
return (error);
/*
* Make sure this thread only runs on the primary cpu.
*/
CPU_INFO_FOREACH(cii, ci) {
if (CPU_IS_PRIMARY(ci)) {
sched_peg_curproc(ci);
break;
}
}
/*
* Make sure we stop the secondary CPUs.
*/
CPU_INFO_FOREACH(cii, ci) {
struct schedstate_percpu *spc = &ci->ci_schedstate;
if (CPU_IS_PRIMARY(ci))
continue;
atomic_setbits_int(&spc->spc_schedflags, SPCF_SHOULDHALT);
}
CPU_INFO_FOREACH(cii, ci) {
struct schedstate_percpu *spc = &ci->ci_schedstate;
struct sleep_state sls;
if (CPU_IS_PRIMARY(ci))
continue;
while ((spc->spc_schedflags & SPCF_HALTED) == 0) {
sleep_setup(&sls, spc, PZERO, "schedstate");
sleep_finish(&sls,
(spc->spc_schedflags & SPCF_HALTED) == 0);
}
}
if_downall();
boot(SCARG(uap, opt));
atomic_clearbits_int(&p->p_flag, P_CPUPEG); /* XXX */
return (0);
}
#if !defined(NO_PROPOLICE)
void __stack_smash_handler(char [], int __attribute__((unused)));
void
__stack_smash_handler(char func[], int damaged)
{
panic("smashed stack in %s", func);
}
#endif
#ifdef SYSCALL_DEBUG
#define SCDEBUG_CALLS 0x0001 /* show calls */
#define SCDEBUG_RETURNS 0x0002 /* show returns */
#define SCDEBUG_ALL 0x0004 /* even syscalls that are implemented */
#define SCDEBUG_SHOWARGS 0x0008 /* show arguments to calls */
int scdebug = SCDEBUG_CALLS|SCDEBUG_RETURNS|SCDEBUG_SHOWARGS;
void
scdebug_call(struct proc *p, register_t code, register_t args[])
{
struct sysent *sy;
struct emul *em;
int i;
if (!(scdebug & SCDEBUG_CALLS))
return;
em = p->p_emul;
sy = &em->e_sysent[code];
if (!(scdebug & SCDEBUG_ALL || code < 0 || code >= em->e_nsysent ||
sy->sy_call == sys_nosys))
return;
printf("proc %d (%s): %s num ", p->p_pid, p->p_comm, em->e_name);
if (code < 0 || code >= em->e_nsysent)
printf("OUT OF RANGE (%d)", code);
else {
printf("%d call: %s", code, em->e_syscallnames[code]);
if (scdebug & SCDEBUG_SHOWARGS) {
printf("(");
for (i = 0; i < sy->sy_argsize / sizeof(register_t);
i++)
printf("%s0x%lx", i == 0 ? "" : ", ",
(long)args[i]);
printf(")");
}
}
printf("\n");
}
void
scdebug_ret(struct proc *p, register_t code, int error, register_t retval[])
{
struct sysent *sy;
struct emul *em;
if (!(scdebug & SCDEBUG_RETURNS))
return;
em = p->p_emul;
sy = &em->e_sysent[code];
if (!(scdebug & SCDEBUG_ALL || code < 0 || code >= em->e_nsysent ||
sy->sy_call == sys_nosys))
return;
printf("proc %d (%s): %s num ", p->p_pid, p->p_comm, em->e_name);
if (code < 0 || code >= em->e_nsysent)
printf("OUT OF RANGE (%d)", code);
else
printf("%d ret: err = %d, rv = 0x%lx,0x%lx", code,
error, (long)retval[0], (long)retval[1]);
printf("\n");
}
#endif /* SYSCALL_DEBUG */
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