The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/ibcs2/ibcs2_isc.c

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    1 /*-
    2  * Copyright (c) 1994 Søren 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 without 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 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/10.1/sys/i386/ibcs2/ibcs2_isc.c 230132 2012-01-15 13:23:18Z uqs $");
   33 
   34 #include <sys/param.h>
   35 #include <sys/lock.h>
   36 #include <sys/mutex.h>
   37 #include <sys/systm.h>
   38 #include <sys/sysent.h>
   39 #include <sys/proc.h>
   40 
   41 #include <machine/cpu.h>
   42 
   43 #include <i386/ibcs2/ibcs2_types.h>
   44 #include <i386/ibcs2/ibcs2_signal.h>
   45 #include <i386/ibcs2/ibcs2_proto.h>
   46 #include <i386/ibcs2/ibcs2_isc_syscall.h>
   47 
   48 extern struct sysent isc_sysent[];
   49 
   50 int
   51 ibcs2_isc(struct thread *td, struct ibcs2_isc_args *uap)
   52 {
   53         struct trapframe *tf = td->td_frame;
   54         struct sysent *callp;
   55         u_int code;
   56         int error;
   57 
   58         code = (tf->tf_eax & 0xffffff00) >> 8;
   59         callp = &isc_sysent[code];
   60 
   61         if (code < IBCS2_ISC_MAXSYSCALL)
   62                 error = (*callp->sy_call)(td, (void *)uap);
   63         else
   64                 error = ENOSYS;
   65         return (error);
   66 }

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