92df1b8f6f
on the SYF_MPSAFE flag in the wrapper system calls for the ISC and Xenix system call vectors. Approved by: re (scottl)
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/*-
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* Copyright (c) 1994 Søren Schmidt
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* Copyright (c) 1994 Sean Eric Fagan
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* Copyright (c) 1995 Steven Wallace
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* 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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <sys/sysent.h>
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#include <sys/proc.h>
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#include <machine/cpu.h>
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#include <i386/ibcs2/ibcs2_types.h>
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#include <i386/ibcs2/ibcs2_signal.h>
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#include <i386/ibcs2/ibcs2_proto.h>
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#include <i386/ibcs2/ibcs2_isc_syscall.h>
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extern struct sysent isc_sysent[];
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int
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ibcs2_isc(struct thread *td, struct ibcs2_isc_args *uap)
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{
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struct trapframe *tf = td->td_frame;
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struct sysent *callp;
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u_int code;
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int error;
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code = (tf->tf_eax & 0xffffff00) >> 8;
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callp = &isc_sysent[code];
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if (code < IBCS2_ISC_MAXSYSCALL) {
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if ((callp->sy_narg & SYF_MPSAFE) == 0)
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mtx_lock(&Giant);
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error = (*callp->sy_call)(td, (void *)uap);
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if ((callp->sy_narg & SYF_MPSAFE) == 0)
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mtx_unlock(&Giant);
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} else
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error = ENOSYS;
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return (error);
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}
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