abi.cpp

//   Copyright 2016-2023 Jean-Francois Poilpret
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.
 
#include "defines.h"
 
// Interesting and complete description here (C++ wise, not AVR specific)
// https://itanium-cxx-abi.github.io/cxx-abi/abi.html
// Default GCC 11.1.0 ABI header
// https://gcc.gnu.org/onlinedocs/gcc-11.1.0/libstdc++/api/a00026.html
namespace __cxxabiv1
{
    typedef int __guard;
 
    void* __dso_handle = nullptr;
 
    extern "C"
    {
        // https://itanium-cxx-abi.github.io/cxx-abi/abi.html#guards
        // https://itanium-cxx-abi.github.io/cxx-abi/abi.html#once-ctor
        int __cxa_guard_acquire(__guard* g UNUSED)
        {
            return 0;
        }
 
        void __cxa_guard_release(__guard* g UNUSED) {}
 
        void __cxa_guard_abort(__guard* g UNUSED) {}
 
        // https://itanium-cxx-abi.github.io/cxx-abi/abi.html#pure-virtual
        void __cxa_pure_virtual(void) {}
 
        // https://itanium-cxx-abi.github.io/cxx-abi/abi.html#dso-dtor
        int __cxa_atexit(void (*destructor)(void*) UNUSED, void* arg UNUSED, void* dso UNUSED)
        {
            return 0;
        }
 
        void __cxa_finalize(void* f UNUSED) {}
    }
}