154 lines
5.6 KiB
C
154 lines
5.6 KiB
C
/****************************************************************************
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* apps/platform/saml21-xplained/src/sam_cxxinitialize.c
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*
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* Copyright (C) 2014, 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#if defined(CONFIG_HAVE_CXX) && defined(CONFIG_HAVE_CXXINITIALIZE)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Debug ********************************************************************/
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/* Non-standard debug that may be enabled just for testing the static
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* constructors.
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*/
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#ifndef CONFIG_DEBUG
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# undef CONFIG_DEBUG_CXX
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#endif
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#ifdef CONFIG_DEBUG_CXX
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# define cxxdbg dbg
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# define cxxlldbg lldbg
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# ifdef CONFIG_DEBUG_VERBOSE
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# define cxxvdbg vdbg
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# define cxxllvdbg llvdbg
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# else
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# define cxxvdbg(x...)
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# define cxxllvdbg(x...)
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# endif
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#else
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# define cxxdbg(x...)
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# define cxxlldbg(x...)
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# define cxxvdbg(x...)
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# define cxxllvdbg(x...)
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This type defines one entry in initialization array */
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typedef void (*initializer_t)(void);
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/****************************************************************************
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* External References
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****************************************************************************/
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/* _sinit and _einit are symbols exported by the linker script that mark the
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* beginning and the end of the C++ initialization section.
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*/
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extern initializer_t _sinit;
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extern initializer_t _einit;
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/* _stext and _etext are symbols exported by the linker script that mark the
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* beginning and the end of text.
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*/
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extern uint32_t _stext;
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extern uint32_t _etext;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_cxxinitialize
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*
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* Description:
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* If C++ and C++ static constructors are supported, then this function
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* must be provided by board-specific logic in order to perform
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* initialization of the static C++ class instances.
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*
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* This function should then be called in the application-specific
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* user_start logic in order to perform the C++ initialization. NOTE
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* that no component of the core NuttX RTOS logic is involved; this
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* function definition only provides the 'contract' between application
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* specific C++ code and platform-specific toolchain support.
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*
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****************************************************************************/
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void up_cxxinitialize(void)
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{
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initializer_t *initp;
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cxxdbg("_sinit: %p _einit: %p _stext: %p _etext: %p\n",
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&_sinit, &_einit, &_stext, &_etext);
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/* Visit each entry in the initialization table */
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for (initp = &_sinit; initp != &_einit; initp++)
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{
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initializer_t initializer = *initp;
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cxxdbg("initp: %p initializer: %p\n", initp, initializer);
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/* Make sure that the address is non-NULL and lies in the text region
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* defined by the linker script. Some toolchains may put NULL values
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* or counts in the initialization table.
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*/
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if ((void *)initializer > (void *)&_stext &&
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(void *)initializer < (void *)&_etext)
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{
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cxxdbg("Calling %p\n", initializer);
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initializer();
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}
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}
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}
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#endif /* CONFIG_HAVE_CXX && CONFIG_HAVE_CXXINITIALIZE */
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