mirror of
https://github.com/adtools/clib2.git
synced 2025-12-08 14:59:05 +00:00
91bcdea2a2
git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14685 87f5fb63-7c3d-0410-a384-fd976d0f7a62
150 lines
6.3 KiB
C
150 lines
6.3 KiB
C
/*
|
|
* $Id: stdlib_swapstack.c,v 1.1.1.1 2004-07-26 16:32:11 obarthel Exp $
|
|
*
|
|
* :ts=4
|
|
*
|
|
* Portable ISO 'C' (1994) runtime library for the Amiga computer
|
|
* Copyright (c) 2002-2004 by Olaf Barthel <olsen@sourcery.han.de>
|
|
* 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
|
|
|
|
/****************************************************************************/
|
|
|
|
__asm(" \n\
|
|
\n\
|
|
.text \n\
|
|
.align 2 \n\
|
|
\n\
|
|
.set MainInterface, 632 \n\
|
|
.set IExec_StackSwap, 272 \n\
|
|
\n\
|
|
.globl SysBase \n\
|
|
.globl __swap_stack_and_call \n\
|
|
\n\
|
|
__swap_stack_and_call: \n\
|
|
stwu r1, -32(r1) # Make a stack frame \n\
|
|
mflr r0 \n\
|
|
stw r0, 36(r1) \n\
|
|
stmw r29, 8(r1) # Get us three GPRs \n\
|
|
# r29 will store IExec \n\
|
|
mr r4, r31 # Backup ptr to function to call \n\
|
|
mr r3, r30 # Backup ptr to StackSwapStruct \n\
|
|
\n\
|
|
lis r3, SysBase@ha # Retrieve sysbase pointer \n\
|
|
lwz r3, SysBase@l(r3) \n\
|
|
lwz r29, MainInterface(r3) # Get IExec \n\
|
|
\n\
|
|
addi r3, r29, IExec_StackSwap # StackSwap entry \n\
|
|
mr r4, r30 # StackSwap struct in r4 \n\
|
|
mtlr r3 \n\
|
|
blrl # IExec->StackSwap(r4) \n\
|
|
\n\
|
|
mtlr r31 # Call payload \n\
|
|
blrl \n\
|
|
\n\
|
|
addi r3, r29, IExec_StackSwap # Revert to old stack \n\
|
|
mr r4, r30 \n\
|
|
mtlr r3 \n\
|
|
blrl \n\
|
|
\n\
|
|
lmw r29, 8(r1) # Restore registers \n\
|
|
lwz r0, 36(r1) \n\
|
|
mtlr r0 \n\
|
|
addi r1, r1, 32 # Clean up stack \n\
|
|
\n\
|
|
blr \n\
|
|
\n\
|
|
");
|
|
|
|
/****************************************************************************/
|
|
|
|
#endif /* __PPC__ */
|
|
|
|
/****************************************************************************/
|
|
|
|
#endif /* __GNUC__ */
|