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Annotation of sys/arch/m68k/m68k/support.s, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: support.s,v 1.3 2006/02/22 22:16:07 miod Exp $        */
        !             2: /*     $NetBSD: support.s,v 1.1 1997/03/16 10:47:33 thorpej Exp $      */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1988 University of Utah.
        !             6:  * Copyright (c) 1980, 1990, 1993
        !             7:  *     The Regents of the University of California.  All rights reserved.
        !             8:  *
        !             9:  * This code is derived from software contributed to Berkeley by
        !            10:  * the Systems Programming Group of the University of Utah Computer
        !            11:  * Science Department.
        !            12:  *
        !            13:  * Redistribution and use in source and binary forms, with or without
        !            14:  * modification, are permitted provided that the following conditions
        !            15:  * are met:
        !            16:  * 1. Redistributions of source code must retain the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer.
        !            18:  * 2. Redistributions in binary form must reproduce the above copyright
        !            19:  *    notice, this list of conditions and the following disclaimer in the
        !            20:  *    documentation and/or other materials provided with the distribution.
        !            21:  * 3. Neither the name of the University nor the names of its contributors
        !            22:  *    may be used to endorse or promote products derived from this software
        !            23:  *    without specific prior written permission.
        !            24:  *
        !            25:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            26:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            27:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            28:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            29:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            30:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            31:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            32:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            33:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            34:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            35:  * SUCH DAMAGE.
        !            36:  *
        !            37:  * from: Utah $Hdr: locore.s 1.66 92/12/22$
        !            38:  *
        !            39:  *     @(#)locore.s    8.6 (Berkeley) 5/27/94
        !            40:  */
        !            41:
        !            42: /*
        !            43:  * Miscellaneous support routines common to all m68k ports.
        !            44:  */
        !            45:
        !            46: /*
        !            47:  * NOTICE: This is not a standalone file.  To use it, #include it in
        !            48:  * your port's locore.s, like so:
        !            49:  *
        !            50:  *     #include <m68k/m68k/support.s>
        !            51:  */
        !            52:
        !            53: /*
        !            54:  * non-local gotos
        !            55:  */
        !            56: ENTRY(setjmp)
        !            57:        movl    sp@(4),a0       | savearea pointer
        !            58:        moveml  #0xFCFC,a0@     | save d2-d7/a2-a7
        !            59:        movl    sp@,a0@(48)     | and return address
        !            60:        moveq   #0,d0           | return 0
        !            61:        rts
        !            62:
        !            63: ENTRY(longjmp)
        !            64:        movl    sp@(4),a0
        !            65:        moveml  a0@+,#0xFCFC
        !            66:        movl    a0@,sp@
        !            67:        moveq   #1,d0
        !            68:        rts