library/stdlib_swapstack.c
/*
* $Id: stdlib_swapstack.c,v 1.4 2006-01-08 12:04:26 obarthel Exp $
*
* :ts=4
*
* 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
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _STDLIB_HEADERS_H
#include "stdlib_headers.h"
#endif /* _STDLIB_HEADERS_H */
/****************************************************************************/
#if defined(__GNUC__)
/****************************************************************************/
#if defined(SMALL_DATA)
#define A4(x) "a4@(" #x ":W)"
#elif defined(SMALL_DATA32)
#define A4(x) "a4@(" #x ":L)"
#else
#define A4(x) #x
#endif /* SMALL_DATA */
/****************************************************************************/
#ifndef __PPC__
/****************************************************************************/
asm(" \n\
.text \n\
.even \n\
\n\
_LVOStackSwap = -732 \n\
\n\
.globl _SysBase \n\
.globl ___swap_stack_and_call \n\
\n\
___swap_stack_and_call: \n\
\n\
moveml d2/a2/a3/a6,sp@- \n\
movel sp@(20),a2 \n\
movel sp@(24),a3 \n\
movel "A4(_SysBase)",a6 \n\
\n\
movel a2,a0 \n\
jsr a6@(_LVOStackSwap:W) \n\
\n\
jsr a3@ \n\
movel d0,d2 \n\
\n\
movel a2,a0 \n\
jsr a6@(_LVOStackSwap:W) \n\
\n\
movel d2,d0 \n\
\n\
moveml sp@+,d2/a2/a3/a6 \n\
\n\
rts \n\
\n\
");
/****************************************************************************/
#else
/****************************************************************************/
/* Swap the current stack configuration out, call a function provided,
swap the stack configuration back and return. */
int
__swap_stack_and_call(struct StackSwapStruct * stk,APTR function)
{
register int result;
StackSwap(stk);
result = ((int (*)(void))function)();
StackSwap(stk);
return(result);
}
/****************************************************************************/
#endif /* __PPC__ */
/****************************************************************************/
#endif /* __GNUC__ */