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      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 #define	REGOFF	(BIAS - CC64FSZ)
     54 
     55 ENTRY(__builtin_saveregs)
     56 	stx	%i0, [%fp + REGOFF + 0x00]	! fr->fr_argd[0]
     57 	stx	%i1, [%fp + REGOFF + 0x08]	! fr->fr_argd[1]
     58 	stx	%i2, [%fp + REGOFF + 0x10]	! fr->fr_argd[2]
     59 	stx	%i3, [%fp + REGOFF + 0x18]	! fr->fr_argd[3]
     60 	stx	%i4, [%fp + REGOFF + 0x20]	! fr->fr_argd[4]
     61 	retl
     62 	 stx	%i5, [%fp + REGOFF + 0x28]	! fr->fr_argd[5]
     63