NetBSD/sys/kern/kern_stub.c

209 lines
6.3 KiB
C

/* $NetBSD: kern_stub.c,v 1.5 2007/12/20 23:03:09 dsl Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1982, 1986, 1991, 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.
*
* @(#)subr_xxx.c 8.3 (Berkeley) 3/29/95
*/
/*
* Stubs for system calls and facilities not included in the system.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_stub.c,v 1.5 2007/12/20 23:03:09 dsl Exp $");
#include "opt_ptrace.h"
#include "opt_ktrace.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/syscallargs.h>
#include <sys/ktrace.h>
/*
* Nonexistent system call-- signal process (may want to handle it). Flag
* error in case process won't see signal immediately (blocked or ignored).
*/
#ifndef PTRACE
__weak_alias(sys_ptrace,sys_nosys);
#endif /* PTRACE */
/*
* ktrace stubs. ktruser() goes to enosys as we want to fail the syscall,
* but not kill the process: utrace() is a debugging feature.
*/
#ifndef KTRACE
__weak_alias(ktr_csw,nullop); /* Probes */
__weak_alias(ktr_emul,nullop);
__weak_alias(ktr_geniov,nullop);
__weak_alias(ktr_genio,nullop);
__weak_alias(ktr_mibio,nullop);
__weak_alias(ktr_namei,nullop);
__weak_alias(ktr_namei2,nullop);
__weak_alias(ktr_psig,nullop);
__weak_alias(ktr_syscall,nullop);
__weak_alias(ktr_sysret,nullop);
__weak_alias(ktr_kuser,nullop);
__weak_alias(ktr_mmsg,nullop);
__weak_alias(ktr_mib,nullop);
__weak_alias(ktr_mool,nullop);
__weak_alias(ktr_execarg,nullop);
__weak_alias(ktr_execenv,nullop);
__weak_alias(sys_fktrace,sys_nosys); /* Syscalls */
__weak_alias(sys_ktrace,sys_nosys);
__weak_alias(sys_utrace,sys_nosys);
int ktrace_on; /* Misc */
__weak_alias(ktruser,enosys);
__weak_alias(ktr_point,nullop);
#endif /* KTRACE */
/*
* Scheduler activations system calls. These need to remain until libc's
* major version is bumped.
*/
__strong_alias(sys_sa_register,sys_nosys);
__strong_alias(sys_sa_stacks,sys_nosys);
__strong_alias(sys_sa_enable,sys_nosys);
__strong_alias(sys_sa_setconcurrency,sys_nosys);
__strong_alias(sys_sa_yield,sys_nosys);
__strong_alias(sys_sa_preempt,sys_nosys);
__strong_alias(sys_sa_unblockyield,sys_nosys);
/* ARGSUSED */
int
sys_nosys(struct lwp *l, const void *v, register_t *retval)
{
mutex_enter(&proclist_mutex);
psignal(l->l_proc, SIGSYS);
mutex_exit(&proclist_mutex);
return ENOSYS;
}
/*
* Unsupported device function (e.g. writing to read-only device).
*/
int
enodev(void)
{
return (ENODEV);
}
/*
* Unconfigured device function; driver not configured.
*/
int
enxio(void)
{
return (ENXIO);
}
/*
* Unsupported ioctl function.
*/
int
enoioctl(void)
{
return (ENOTTY);
}
/*
* Unsupported system function.
* This is used for an otherwise-reasonable operation
* that is not supported by the current system binary.
*/
int
enosys(void)
{
return (ENOSYS);
}
/*
* Return error for operation not supported
* on a specific object or file type.
*/
int
eopnotsupp(void)
{
return (EOPNOTSUPP);
}
/*
* Generic null operation, always returns success.
*/
/*ARGSUSED*/
int
nullop(void *v)
{
return (0);
}