ibcs2_isc.c revision 21673 
1/*-
2 * Copyright (c) 1994 S�ren Schmidt
3 * Copyright (c) 1994 Sean Eric Fagan
4 * Copyright (c) 1995 Steven Wallace
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer
12 *    in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 *    derived from this software withough specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 *	$FreeBSD: head/sys/i386/ibcs2/ibcs2_isc.c 21673 1997-01-14 07:20:47Z jkh $
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/sysent.h>
36#include <sys/proc.h>
37
38#include <machine/cpu.h>
39#include <machine/psl.h>
40#include <machine/reg.h>
41
42#include <i386/ibcs2/ibcs2_types.h>
43#include <i386/ibcs2/ibcs2_signal.h>
44#include <i386/ibcs2/ibcs2_util.h>
45#include <i386/ibcs2/ibcs2_proto.h>
46#include <i386/ibcs2/ibcs2_isc_syscall.h>
47
48extern struct sysent isc_sysent[];
49
50int
51ibcs2_isc(struct proc *p, struct ibcs2_isc_args *uap, int *retval)
52{
53	struct trapframe *tf = (struct trapframe *)p->p_md.md_regs;
54        struct sysent *callp;
55        u_int code;
56
57	code = (tf->tf_eax & 0xffffff00) >> 8;
58	callp = &isc_sysent[code];
59
60	if(code < IBCS2_ISC_MAXSYSCALL)
61	  return((*callp->sy_call)(p, (void *)uap, retval));
62	else
63	  return ENOSYS;
64}
65