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/************************************************************************************
* configs/stm32f4discovery/src/up_cxxinitialize.c
* arch/arm/src/board/up_cxxinitialize.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its 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.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <debug.h>
#include <nuttx/arch.h>
/************************************************************************************
* Definitions
************************************************************************************/
/* Debug ****************************************************************************/
/* Non-standard debug that may be enabled just for testing the static constructors */
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_CXX
#endif
#ifdef CONFIG_DEBUG_CXX
# define cxxdbg dbg
# define cxxlldbg lldbg
# ifdef CONFIG_DEBUG_VERBOSE
# define cxxvdbg vdbg
# define cxxllvdbg llvdbg
# else
# define cxxvdbg(x...)
# define cxxllvdbg(x...)
# endif
#else
# define cxxdbg(x...)
# define cxxlldbg(x...)
# define cxxvdbg(x...)
# define cxxllvdbg(x...)
#endif
/************************************************************************************
* Private Types
************************************************************************************/
/* This type defines one entry in initialization array */
typedef void (*initializer_t)(void);
/************************************************************************************
* External references
************************************************************************************/
/* _sinit and _einit are symbols exported by the linker script that mark the
* beginning and the end of the C++ initialization section.
*/
extern initializer_t _sinit;
extern initializer_t _einit;
/* _stext and _etext are symbols exported by the linker script that mark the
* beginning and the end of text.
*/
extern uint32_t _stext;
extern uint32_t _etext;
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/****************************************************************************
* Name: up_cxxinitialize
*
* Description:
* If C++ and C++ static constructors are supported, then this function
* must be provided by board-specific logic in order to perform
* initialization of the static C++ class instances.
*
* This function should then be called in the application-specific
* user_start logic in order to perform the C++ initialization. NOTE
* that no component of the core NuttX RTOS logic is involved; This
* function defintion only provides the 'contract' between application
* specific C++ code and platform-specific toolchain support
*
***************************************************************************/
__EXPORT void up_cxxinitialize(void)
{
initializer_t *initp;
cxxdbg("_sinit: %p _einit: %p _stext: %p _etext: %p\n",
&_sinit, &_einit, &_stext, &_etext);
/* Visit each entry in the initialzation table */
for (initp = &_sinit; initp != &_einit; initp++)
{
initializer_t initializer = *initp;
cxxdbg("initp: %p initializer: %p\n", initp, initializer);
/* Make sure that the address is non-NULL and lies in the text region
* defined by the linker script. Some toolchains may put NULL values
* or counts in the initialization table
*/
if ((void*)initializer > (void*)&_stext && (void*)initializer < (void*)&_etext)
{
cxxdbg("Calling %p\n", initializer);
initializer();
}
}
}
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