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109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/*
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* crtbegin.c
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*
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* :ts=4
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*
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* Handles global constructors and destructors for the OS4 GCC build.
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*
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
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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(__amigaos4__)
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/****************************************************************************/
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#ifndef EXEC_TYPES_H
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#include <exec/types.h>
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#endif /* EXEC_TYPES_H */
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/****************************************************************************/
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/*
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* Dummy constructor and destructor array. The linker script will put these at the
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* very beginning of section ".ctors" and ".dtors". crtend.o contains a similar entry
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* with a NULL pointer entry and is put at the end of the sections. This way, the init
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* code can find the global constructor/destructor pointers.
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*
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* WARNING:
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* This hack does not work correctly with GCC 5 and higher. The optimizer
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* will see a one element array and act appropriately. The current workaround
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* is to use -fno-aggressive-loop-optimizations when compiling this file.
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*/
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static void (*__CTOR_LIST__[1]) (void) __attribute__(( used, section(".ctors"), aligned(sizeof(void (*)(void))) ));
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static void (*__DTOR_LIST__[1]) (void) __attribute__(( used, section(".dtors"), aligned(sizeof(void (*)(void))) ));
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/****************************************************************************/
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void _init(void);
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void _fini(void);
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/****************************************************************************/
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void
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_init(void)
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{
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extern void shared_obj_init(void);
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int num_ctors,i;
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int j;
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/* The shared objects need to be set up before any local
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constructors are invoked. */
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shared_obj_init();
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for(i = 1, num_ctors = 0 ; __CTOR_LIST__[i] != NULL ; i++)
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num_ctors++;
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for(j = 0 ; j < num_ctors ; j++)
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__CTOR_LIST__[num_ctors - j]();
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}
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/****************************************************************************/
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void
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_fini(void)
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{
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extern void shared_obj_exit(void);
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int num_dtors,i;
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static int j;
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for(i = 1, num_dtors = 0 ; __DTOR_LIST__[i] != NULL ; i++)
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num_dtors++;
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while(j++ < num_dtors)
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__DTOR_LIST__[j]();
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/* The shared objects need to be cleaned up after all local
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destructors have been invoked. */
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shared_obj_exit();
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}
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/****************************************************************************/
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#endif /*__amigaos4__ */
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