saveregs.S revision 1.1 
1/*	$NetBSD: saveregs.S,v 1.1 2005/12/20 19:28:50 christos Exp $	*/
2
3/*
4 * Copyright (c) 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * from: Header: saveregs.s,v 1.1 91/07/06 17:22:33 torek Exp
36 */
37
38#include <machine/asm.h>
39#if defined(LIBC_SCCS) && !defined(lint)
40	RCSID("$NetBSD: saveregs.S,v 1.1 2005/12/20 19:28:50 christos Exp $")
41#endif /* LIBC_SCCS and not lint */
42
43/*
44 * Save register arguments in caller's `arg dump' area, so that
45 * stdarg functions work.
46 *
47 * This really should be done with a pointer to the arg dump area;
48 * our caller should allocate that area, not our caller's caller.
49 * But then, they did not let me invent the calling sequence....
50 *
51 * We assume the caller has executed a `save' instruction.
52 */
53
54ENTRY(__builtin_saveregs)
55	st	%i0, [%fp + 0x44]	! fr->fr_argd[0]
56	st	%i1, [%fp + 0x48]	! fr->fr_argd[1]
57	st	%i2, [%fp + 0x4c]	! fr->fr_argd[2]
58	st	%i3, [%fp + 0x50]	! fr->fr_argd[3]
59	st	%i4, [%fp + 0x54]	! fr->fr_argd[4]
60	retl
61	st	%i5, [%fp + 0x58]	! fr->fr_argd[5]
62