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git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15079 87f5fb63-7c3d-0410-a384-fd976d0f7a62
94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
/*
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* $Id: amiga_callhooka.c,v 1.3 2006-01-08 12:04:22 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2006 by Olaf Barthel <olsen (at) sourcery.han.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if (defined(__GNUC__) && !defined(__PPC__))
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/****************************************************************************/
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asm("
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h_Entry = 8
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.text
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.even
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|---------------------------------------------------------------------------
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| new hook standard
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| use struct Hook (with minnode at the top)
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| *** register calling convention: ***
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| A0 - pointer to hook itself
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| A1 - pointer to parameter packed ('message')
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| A2 - Hook specific address data ('object,' e.g, gadget )
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| *** C conventions: ***
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| Note that parameters are in unusual register order: a0, a2, a1.
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| This is to provide a performance boost for assembly language
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| programming (the object in a2 is most frequently untouched).
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| It is also no problem in 'register direct' C function parameters.
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| calling through a hook
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| CallHook( hook, object, msgid, p1, p2, ... );
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| CallHookA( hook, object, msgpkt );
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| using a C function: CFunction( hook, object, message );
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| hook.h_Entry = HookEntry;
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| hook.h_SubEntry = CFunction;
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|---------------------------------------------------------------------------
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| C calling hook interface for prepared message packet
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.globl _CallHookA
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_CallHookA:
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moveml a2/a6,sp@-
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moveal sp@(12),a0
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moveal sp@(16),a2
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moveal sp@(20),a1
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pea callhooka_return
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movel a0@(h_Entry),sp@-
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rts
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callhooka_return:
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moveml sp@+,a2/a6
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rts
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");
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/****************************************************************************/
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#endif /* __GNUC__ && !__PPC__ */
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