/* ----------------------------------------------------------------------------
 * Copyright (c) Huawei Technologies Co., Ltd. 2013-2019. All rights reserved.
 * Description: LiteOS Cpp Support Implementation
 * Author: Huawei LiteOS Team
 * Create: 2013-01-01
 * 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 of the copyright holder 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 HOLDER 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.
 * --------------------------------------------------------------------------- */

#include "los_cppsupport_pri.h"
#include "los_printf.h"

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */

typedef VOID (*InitFunc)(VOID);

/*-------------------------------------------
*`LITE_OS_SEC_TEXT_MINOR`、`UINTPTR`等。
*在`LOS_CppSystemInit`函数中，它遍历了一个初始化函数的数组，
*并依次调用这些初始化函数。根据传入的`flag`参数，
*它会在特定的位置执行初始化函数。
*--------------------------------------------*/
LITE_OS_SEC_TEXT_MINOR INT32 LOS_CppSystemInit(UINTPTR initArrayStart, UINTPTR initArrayEnd, INT32 flag)
{
    UINTPTR fastEnd    = (UINTPTR)&__fast_end;
    UINTPTR *start     = (UINTPTR *)initArrayStart;
    InitFunc initFunc   = NULL;

#ifdef LOSCFG_AARCH64
    __register_frame(__EH_FRAME_BEGIN__);
#endif
    
    for (; start != (UINTPTR *)initArrayEnd; ++start) {
        if ((flag == BEFORE_SCATTER) && ((UINTPTR)*start > fastEnd)) {
            continue;
        } else if ((flag == AFTER_SCATTER) && ((UINTPTR)*start <= fastEnd)) {
            continue;
        }

        initFunc = (InitFunc)(*start);
        initFunc();
    }

    return 0;
}

#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */