adtools/clib2

*
*    $Id: stdlib_swapstack.asm,v 1.3 2006-01-08 12:04:26 obarthel Exp $
*
*    :ts=8
*
*    Portable ISO 'C' (1994) runtime library for the Amiga computer
*    Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
*    All rights reserved.
*
*    Redistribution and use in source and binary forms, with or without
*    modification, are permitted provided that the following conditions
*    are met:
*
*      - Redistributions of source code must retain the above copyright
*        notice, this list of conditions and the following disclaimer.
*
*      - Neither the name of Olaf Barthel nor the names of contributors
*        may be used to endorse or promote products derived from this
*        software without specific prior written permission.
*
*    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
*    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
*    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
*    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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*    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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*

    include    "exec/macros.i"

    section    text,code

_LVOStackSwap equ -732

    xref    _SysBase

    xdef    ___swap_stack_and_call

___swap_stack_and_call:

    movem.l    d2/a2/a3/a6,-(sp)

    move.l    _SysBase,a6

    move.l    20(sp),a2
    move.l    24(sp),a3

    move.l    a2,a0
    jsr    _LVOStackSwap(a6)

    jsr    (a3)
    move.l    d0,d2

    move.l    a2,a0
    jsr    _LVOStackSwap(a6)

    move.l    d2,d0

    movem.l    (sp)+,d2/a2/a3/a6
    rts

    end