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gccollect.h

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    Josef Gajdusek authored and Damien George committed
    As user_init() is not a true main functions, the stack pointer captured within
    is not pointing at the base of the stack. This caused gc_collect being called
    with sp being higher than stack_end, causing integer overflow and crashing as
    gc tried to scan almost the entire address space.
    28076f3d
    History
    gccollect.h 1.56 KiB
    /*
     * This file is part of the Micro Python project, http://micropython.org/
     *
     * The MIT License (MIT)
     *
     * Copyright (c) 2014 Damien P. George
     *
     * Permission is hereby granted, free of charge, to any person obtaining a copy
     * of this software and associated documentation files (the "Software"), to deal
     * in the Software without restriction, including without limitation the rights
     * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     * copies of the Software, and to permit persons to whom the Software is
     * furnished to do so, subject to the following conditions:
     *
     * The above copyright notice and this permission notice shall be included in
     * all copies or substantial portions of the Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     * THE SOFTWARE.
     */
    
    extern uint32_t _text_start;
    extern uint32_t _text_end;
    extern uint32_t _irom0_text_start;
    extern uint32_t _irom0_text_end;
    extern uint32_t _data_start;
    extern uint32_t _data_end;
    extern uint32_t _rodata_start;
    extern uint32_t _rodata_end;
    extern uint32_t _bss_start;
    extern uint32_t _bss_end;
    extern uint32_t _heap_start;
    extern uint32_t _heap_end;
    
    void gc_collect(void);