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53482be09c
Enable revo C++ support: 1. Set USE_CXX to enable compliation and linkage of C++ source code 2. Disables rtti and exceptions 3. operator new and delete call pios malloc/free 4. Static constructor invocation supported 5. Additional methods, compile options, and need to have main as a cpp to solve various link issues when using static constructors but to avoid adding unnecessary libs. 6. Upgrade arm tools
90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
/**
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******************************************************************************
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* @addtogroup PIOS PIOS Core hardware abstraction layer
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* @{
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*
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* @file mini_cpp.cpp
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2014.
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* @brief CPP support methods
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <pios.h>
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// _init is called by __libc_init_array during invocation of static constructors
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// __libc_init_array calls _init, which is defined in crti.o. _init calls functions that are in .init section.
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// If you don't have meaningful stuff in .init section, just define an empty _init function.
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extern "C" int _init(void)
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{
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return 0;
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}
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// operator new
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void *operator new(size_t size) throw()
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{
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return pios_malloc(size);
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}
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// operator delete
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void operator delete(void *p) throw()
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{
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pios_free(p);
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}
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// The function __aeabi_atexit() handles the static destructors. This can be empty
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// because we have no operating system to return to, hence the static destructors
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// will never be called.
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extern "C" int __aeabi_atexit(__attribute__((unused)) void *object, __attribute__((unused)) void (*destructor)(void *), __attribute__((unused)) void *dso_handle)
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{
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return 0;
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}
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// see https://answers.launchpad.net/gcc-arm-embedded/+question/221105
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// and https://answers.launchpad.net/gcc-arm-embedded/+question/224709
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__extension__ typedef int __guard __attribute__((mode(__DI__)));
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extern "C" int __cxa_atexit(void (*f)(void *), void *p, void *d);
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extern "C" int __cxa_guard_acquire(__guard *);
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extern "C" void __cxa_guard_release(__guard *);
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extern "C" void __cxa_guard_abort(__guard *);
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extern "C" void __cxa_pure_virtual(void);
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int __cxa_guard_acquire(__attribute__((unused)) __guard *g)
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{
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return !*(char *)(g);
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};
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void __cxa_guard_release(__attribute__((unused)) __guard *g)
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{
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*(char *)g = 1;
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};
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void __cxa_guard_abort(__attribute__((unused)) __guard *) {};
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void __cxa_pure_virtual(void)
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{
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while (1) {
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;
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}
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}
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int __cxa_atexit(__attribute__((unused)) void (*f)(void *), __attribute__((unused)) void *p, __attribute__((unused)) void *d)
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{
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return 0;
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};
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/**
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* @}
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*/
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