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 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  * $FreeBSD$
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/sysent.h>
   35 #include <sys/proc.h>
   36 
   37 #include <machine/cpu.h>
   38 
   39 #include <i386/ibcs2/ibcs2_types.h>
   40 #include <i386/ibcs2/ibcs2_signal.h>
   41 #include <i386/ibcs2/ibcs2_proto.h>
   42 #include <i386/ibcs2/ibcs2_isc_syscall.h>
   43 
   44 extern struct sysent isc_sysent[];
   45 
   46 int
   47 ibcs2_isc(struct proc *p, struct ibcs2_isc_args *uap)
   48 {
   49         struct trapframe *tf = p->p_md.md_regs;
   50         struct sysent *callp;
   51         u_int code;             
   52 
   53         code = (tf->tf_eax & 0xffffff00) >> 8;
   54         callp = &isc_sysent[code];
   55 
   56         if(code < IBCS2_ISC_MAXSYSCALL)
   57           return((*callp->sy_call)(p, (void *)uap));
   58         else
   59           return ENOSYS;
   60 }

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