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frame.h revision 1.1 
      1 /*	$NetBSD: frame.h,v 1.1 1995/11/12 15:07:30 ragge Exp $ */
      2 /*
      3  * Copyright (c) 1995 Ludd, University of Lule}, Sweden.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed at Ludd, University of
     17  *      Lule}, Sweden and its contributors.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /*
     34  * Description of calls frame on stack. This is the
     35  * standard way of making procedure calls on vax systems.
     36  */
     37 struct callsframe {
     38 	unsigned int	ca_cond;	/* condition handler */
     39 	unsigned int	ca_maskpsw;	/* register mask and saved psw */
     40 	unsigned int	ca_ap;		/* argument pointer */
     41 	unsigned int	ca_fp;		/* frame pointer */
     42 	unsigned int	ca_pc;		/* program counter */
     43 	unsigned int	ca_argno;	/* argument count on stack */
     44 	unsigned int	ca_arg1;	/* first arg on stack */
     45 	/* This can be followed by more arguments */
     46 };
     47 
     48 /* Offset to beginning of calls frame from first arg */
     49 #define	FRAMEOFFSET(arg1) ((struct callsframe *)((unsigned int)&(arg1) - 24))
     50 
     51