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Annotation of sys/lib/libkern/arch/sparc/saveregs.S, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: saveregs.S,v 1.3 2003/06/02 23:28:09 millert Exp $    */
                      2: /*     $NetBSD: saveregs.S,v 1.2 1994/10/26 06:40:07 cgd 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:  * Redistribution and use in source and binary forms, with or without
                     13:  * modification, are permitted provided that the following conditions
                     14:  * are met:
                     15:  * 1. Redistributions of source code must retain the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer.
                     17:  * 2. Redistributions in binary form must reproduce the above copyright
                     18:  *    notice, this list of conditions and the following disclaimer in the
                     19:  *    documentation and/or other materials provided with the distribution.
                     20:  * 3. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  *
                     36:  * Header: saveregs.s,v 1.1 91/07/06 17:22:33 torek Exp
                     37:  */
                     38:
                     39: /*
                     40:  * Save register arguments in caller's `arg dump' area, so that
                     41:  * stdarg functions work.
                     42:  *
                     43:  * This really should be done with a pointer to the arg dump area;
                     44:  * our caller should allocate that area, not our caller's caller.
                     45:  * But then, they did not let me invent the calling sequence....
                     46:  *
                     47:  * We assume the caller has executed a `save' instruction.
                     48:  */
                     49: #include "DEFS.h"
                     50:
                     51: ENTRY(__builtin_saveregs)
                     52:        st      %i0, [%fp + 0x44]       ! fr->fr_argd[0]
                     53:        st      %i1, [%fp + 0x48]       ! fr->fr_argd[1]
                     54:        st      %i2, [%fp + 0x4c]       ! fr->fr_argd[2]
                     55:        st      %i3, [%fp + 0x50]       ! fr->fr_argd[3]
                     56:        st      %i4, [%fp + 0x54]       ! fr->fr_argd[4]
                     57:        retl
                     58:        st      %i5, [%fp + 0x58]       ! fr->fr_argd[5]