/**************************************************************************** * apps/platform/sama5d3x-ek/src/sam_cxxinitialize.c * * Copyright (C) 2013, 2016 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #if defined(CONFIG_HAVE_CXX) && defined(CONFIG_HAVE_CXXINITIALIZE) /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Debug ********************************************************************/ /* Non-standard debug that may be enabled just for testing the static * constructors. */ #ifdef CONFIG_DEBUG_CXX # define cxxinfo info #else # define cxxinfo(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; /**************************************************************************** * 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 definition only provides the 'contract' between application * specific C++ code and platform-specific toolchain support. * ****************************************************************************/ void up_cxxinitialize(void) { initializer_t *initp; cxxinfo("_sinit: %p _einit: %p _stext: %p _etext: %p\n", &_sinit, &_einit, &_stext, &_etext); /* Visit each entry in the initialization table */ for (initp = &_sinit; initp != &_einit; initp++) { initializer_t initializer = *initp; cxxinfo("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) { cxxinfo("Calling %p\n", initializer); initializer(); } } } #endif /* CONFIG_HAVE_CXX && CONFIG_HAVE_CXXINITIALIZE */