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Annotation of sys/arch/sparc/include/frame.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: frame.h,v 1.3 2003/06/02 23:27:54 millert Exp $       */
                      2: /*     $NetBSD: frame.h,v 1.2 1994/11/20 20:53:07 deraadt Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1992, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This software was developed by the Computer Systems Engineering group
                      9:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
                     10:  * contributed to Berkeley.
                     11:  *
                     12:  * All advertising materials mentioning features or use of this software
                     13:  * must display the following acknowledgement:
                     14:  *     This product includes software developed by the University of
                     15:  *     California, Lawrence Berkeley Laboratory.
                     16:  *
                     17:  * Redistribution and use in source and binary forms, with or without
                     18:  * modification, are permitted provided that the following conditions
                     19:  * are met:
                     20:  * 1. Redistributions of source code must retain the above copyright
                     21:  *    notice, this list of conditions and the following disclaimer.
                     22:  * 2. Redistributions in binary form must reproduce the above copyright
                     23:  *    notice, this list of conditions and the following disclaimer in the
                     24:  *    documentation and/or other materials provided with the distribution.
                     25:  * 3. Neither the name of the University nor the names of its contributors
                     26:  *    may be used to endorse or promote products derived from this software
                     27:  *    without specific prior written permission.
                     28:  *
                     29:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     30:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     31:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     32:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     33:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     34:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     35:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     36:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     37:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     38:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     39:  * SUCH DAMAGE.
                     40:  *
                     41:  *     @(#)frame.h     8.1 (Berkeley) 6/11/93
                     42:  */
                     43:
                     44: /*
                     45:  * Sparc stack frame format.
                     46:  *
                     47:  * Note that the contents of each stack frame may be held only in
                     48:  * machine register windows.  In order to get an accurate picture
                     49:  * of the frame, you must first force the kernel to write any such
                     50:  * windows to the stack.
                     51:  */
                     52: struct frame {
                     53:        int     fr_local[8];    /* space to save locals (%l0..%l7) */
                     54:        int     fr_arg[6];      /* space to save arguments (%i0..%i5) */
                     55:        struct  frame *fr_fp;   /* space to save frame pointer (%i6) */
                     56:        int     fr_pc;          /* space to save return pc (%i7) */
                     57:        /*
                     58:         * SunOS reserves another 8 words here; this is pointless
                     59:         * but we do it for compatibility.
                     60:         */
                     61:        int     fr_xxx;         /* `structure return pointer' (unused) */
                     62:        int     fr_argd[6];     /* `arg dump area' (lunacy) */
                     63:        int     fr_argx[1];     /* arg extension (args 7..n; variable size) */
                     64: };