NetBSD/sys/kern/kern_xxx.c

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/* $NetBSD: kern_xxx.c,v 1.49 2002/06/19 23:35:35 eeh Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
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* @(#)kern_xxx.c 8.3 (Berkeley) 2/14/95
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*/
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#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_xxx.c,v 1.49 2002/06/19 23:35:35 eeh Exp $");
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#include "opt_syscall_debug.h"
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#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/reboot.h>
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#include <sys/sysctl.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
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/* ARGSUSED */
int
sys_reboot(p, v, retval)
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struct proc *p;
void *v;
register_t *retval;
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{
struct sys_reboot_args /* {
syscallarg(int) opt;
syscallarg(char *) bootstr;
} */ *uap = v;
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int error;
char *bootstr, bs[128];
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if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
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return (error);
/*
* Only use the boot string if RB_STRING is set.
*/
if ((SCARG(uap, opt) & RB_STRING) &&
(error = copyinstr(SCARG(uap, bootstr), bs, sizeof(bs), 0)) == 0)
bootstr = bs;
else
bootstr = NULL;
/*
* Not all ports use the bootstr currently.
*/
cpu_reboot(SCARG(uap, opt), bootstr);
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return (0);
}
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#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 */
#if 0
int scdebug = SCDEBUG_CALLS|SCDEBUG_RETURNS|SCDEBUG_SHOWARGS;
#else
int scdebug = SCDEBUG_CALLS|SCDEBUG_RETURNS|SCDEBUG_SHOWARGS|SCDEBUG_ALL;
#endif
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void
scdebug_call(p, code, args)
struct proc *p;
register_t code, args[];
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{
const struct sysent *sy;
const struct emul *em;
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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;
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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 (%ld)", (long)code);
else {
printf("%ld call: %s", (long)code, em->e_syscallnames[code]);
if (scdebug & SCDEBUG_SHOWARGS) {
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printf("(");
for (i = 0; i < sy->sy_narg; i++)
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printf("%s0x%lx", i == 0 ? "" : ", ",
(long)args[i]);
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printf(")");
}
}
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printf("\n");
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}
void
scdebug_ret(p, code, error, retval)
struct proc *p;
register_t code;
int error;
register_t retval[];
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{
const struct sysent *sy;
const 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;
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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 (%ld)", (long)code);
else
printf("%ld ret: err = %d, rv = 0x%lx,0x%lx", (long)code,
error, (long)retval[0], (long)retval[1]);
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printf("\n");
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}
#endif /* SYSCALL_DEBUG */