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/*
* File : crt_init.c
* This file is part of Device File System in RT-Thread RTOS
* COPYRIGHT (C) 2008-2015, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2014-12-03 Bernard Add copyright header.
* 2014-12-29 Bernard Add cplusplus initialization for ARMCC.
* 2016-06-28 Bernard Add _init/_fini routines for GCC.
* 2016-10-02 Bernard Add WEAK for cplusplus_system_init routine.
*/
#include <rtthread.h>
#ifdef __CC_ARM
extern void $Super$$__cpp_initialize__aeabi_(void);
/* we need to change the cpp_initialize order */
void $Sub$$__cpp_initialize__aeabi_(void)
{
/* empty */
}
#elif defined(__GNUC__) && !defined(__CS_SOURCERYGXX_MAJ__)
/* The _init()/_fini() routines has been defined in codesourcery g++ lite */
void _init()
{
}
void _fini()
{
}
RT_WEAK void *__dso_handle = 0;
#endif
RT_WEAK
int cplusplus_system_init(void)
{
#if defined(__GNUC__) && !defined(__CC_ARM)
typedef void (*pfunc) ();
extern pfunc __ctors_start__[];
extern pfunc __ctors_end__[];
pfunc *p;
for (p = __ctors_start__; p < __ctors_end__; p++)
(*p)();
#elif defined(__CC_ARM)
/* If there is no SHT$$INIT_ARRAY, calling
* $Super$$__cpp_initialize__aeabi_() will cause fault. At least until Keil5.12
* the problem still exists. So we have to initialize the C++ runtime by ourself.
*/
typedef void PROC();
extern const unsigned long SHT$$INIT_ARRAY$$Base[];
extern const unsigned long SHT$$INIT_ARRAY$$Limit[];
const unsigned long *base = SHT$$INIT_ARRAY$$Base;
const unsigned long *lim = SHT$$INIT_ARRAY$$Limit;
for (; base != lim; base++)
{
PROC *proc = (PROC*)((const char*)base + *base);
(*proc)();
}
#endif
return 0;
}
INIT_COMPONENT_EXPORT(cplusplus_system_init);
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