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author | px4dev <px4@purgatory.org> | 2012-10-27 21:42:27 -0700 |
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committer | px4dev <px4@purgatory.org> | 2012-10-27 21:42:27 -0700 |
commit | f04c522f4f26284ba322122904ee57627ce4ccf7 (patch) | |
tree | 223744f04abf265421f3d592eb5462ee2b359d42 /apps | |
parent | 9184753f177ff0ade1b1af60215906938c81c3e3 (diff) | |
download | px4-firmware-f04c522f4f26284ba322122904ee57627ce4ccf7.tar.gz px4-firmware-f04c522f4f26284ba322122904ee57627ce4ccf7.tar.bz2 px4-firmware-f04c522f4f26284ba322122904ee57627ce4ccf7.zip |
Get us a bit closer to having c++ static constructors working.
Diffstat (limited to 'apps')
-rw-r--r-- | apps/systemlib/Makefile | 3 | ||||
-rw-r--r-- | apps/systemlib/up_cxxinitialize.c | 153 |
2 files changed, 155 insertions, 1 deletions
diff --git a/apps/systemlib/Makefile b/apps/systemlib/Makefile index 4bc7033e7..5778c552e 100644 --- a/apps/systemlib/Makefile +++ b/apps/systemlib/Makefile @@ -42,7 +42,8 @@ CSRCS = err.c \ bson/tinybson.c \ conversions.c \ cpuload.c \ - getopt_long.c + getopt_long.c \ + up_cxxinitialize.c # ppm_decode.c \ diff --git a/apps/systemlib/up_cxxinitialize.c b/apps/systemlib/up_cxxinitialize.c new file mode 100644 index 000000000..c500b37e9 --- /dev/null +++ b/apps/systemlib/up_cxxinitialize.c @@ -0,0 +1,153 @@ +/************************************************************************************ + * 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> + +//#include <arch/stm32/chip.h> +//#include "chip.h" + +/************************************************************************************ + * Definitions + ************************************************************************************/ +/* Debug ****************************************************************************/ +/* Non-standard debug that may be enabled just for testing the static constructors */ + +#ifndef CONFIG_DEBUG +# undef CONFIG_DEBUG_CXX +#endif + +#define CONFIG_DEBUG_CXX +#define CONFIG_DEBUG_VERBOSE + +#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(); + } + } +} |