164 lines
4.7 KiB
C
164 lines
4.7 KiB
C
/* $NetBSD: kern_xxx.c,v 1.56 2005/12/11 12:24:29 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 8.3 (Berkeley) 2/14/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_xxx.c,v 1.56 2005/12/11 12:24:29 christos Exp $");
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#include "opt_syscall_debug.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/reboot.h>
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#include <sys/syscall.h>
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#include <sys/sysctl.h>
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#include <sys/mount.h>
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#include <sys/sa.h>
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#include <sys/syscallargs.h>
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/* ARGSUSED */
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int
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sys_reboot(struct lwp *l, 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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syscallarg(char *) bootstr;
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} */ *uap = v;
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struct proc *p = l->l_proc;
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int error;
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char *bootstr, bs[128];
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if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
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return (error);
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/*
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* Only use the boot string if RB_STRING is set.
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*/
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if ((SCARG(uap, opt) & RB_STRING) &&
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(error = copyinstr(SCARG(uap, bootstr), bs, sizeof(bs), 0)) == 0)
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bootstr = bs;
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else
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bootstr = NULL;
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/*
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* Not all ports use the bootstr currently.
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*/
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cpu_reboot(SCARG(uap, opt), bootstr);
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return (0);
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}
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#ifdef SYSCALL_DEBUG
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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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#if 0
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int scdebug = SCDEBUG_CALLS|SCDEBUG_RETURNS|SCDEBUG_SHOWARGS;
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#else
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int scdebug = SCDEBUG_CALLS|SCDEBUG_RETURNS|SCDEBUG_SHOWARGS|SCDEBUG_ALL;
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#endif
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void
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scdebug_call(struct lwp *l, register_t code, register_t args[])
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{
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struct proc *p = l->l_proc;
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const struct sysent *sy;
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const struct emul *em;
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int i;
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if (!(scdebug & SCDEBUG_CALLS))
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return;
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em = p->p_emul;
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sy = &em->e_sysent[code];
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if (!(scdebug & SCDEBUG_ALL || code < 0
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#ifndef __HAVE_MINIMAL_EMUL
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|| code >= em->e_nsysent
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#endif
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|| sy->sy_call == sys_nosys))
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return;
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printf("proc %d (%s): %s num ", p->p_pid, p->p_comm, em->e_name);
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if (code < 0
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#ifndef __HAVE_MINIMAL_EMUL
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|| code >= em->e_nsysent
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#endif
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)
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printf("OUT OF RANGE (%ld)", (long)code);
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else {
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printf("%ld call: %s", (long)code, em->e_syscallnames[code]);
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if (scdebug & SCDEBUG_SHOWARGS) {
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printf("(");
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for (i = 0; i < sy->sy_argsize/sizeof(register_t); i++)
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printf("%s0x%lx", i == 0 ? "" : ", ",
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(long)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 lwp *l, register_t code, int error, register_t retval[])
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{
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struct proc *p = l->l_proc;
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const struct sysent *sy;
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const struct emul *em;
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if (!(scdebug & SCDEBUG_RETURNS))
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return;
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em = p->p_emul;
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sy = &em->e_sysent[code];
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if (!(scdebug & SCDEBUG_ALL || code < 0
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#ifndef __HAVE_MINIMAL_EMUL
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|| code >= em->e_nsysent
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#endif
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|| sy->sy_call == sys_nosys))
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return;
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printf("proc %d (%s): %s num ", p->p_pid, p->p_comm, em->e_name);
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if (code < 0
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#ifndef __HAVE_MINIMAL_EMUL
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|| code >= em->e_nsysent
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#endif
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)
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printf("OUT OF RANGE (%ld)", (long)code);
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else
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printf("%ld ret: err = %d, rv = 0x%lx,0x%lx", (long)code,
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error, (long)retval[0], (long)retval[1]);
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printf("\n");
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}
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#endif /* SYSCALL_DEBUG */
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