text: /* ----------------------------------------------------------------------------
   * Copyright (c) Huawei Technologies Co., Ltd. 2013-2020. All rights reserved.
   * Description:  Exception Implementation
   * Author: Huawei LiteOS Team
   * Create: 2020-06-24
   * 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.
   * --------------------------------------------------------------------------- */
  /* ----------------------------------------------------------------------------
   * Notice of Export Control Law
   * ===============================================
   * Huawei LiteOS may be subject to applicable export control laws and regulations, which might
   * include those applicable to Huawei LiteOS of U.S. and the country in which you are located.
   * Import, export and usage of Huawei LiteOS in any manner by you shall be in compliance with such
   * applicable export control laws and regulations.
   * --------------------------------------------------------------------------- */
  #include "los_exc.h"
  #include "los_printf_pri.h"
  #include "los_task_pri.h"
  
  VOID LOS_Panic(const CHAR *fmt, ...)
  {
      va_list ap;
      va_start(ap, fmt);
      UartVprintf(fmt, ap);
      va_end(ap);
      ArchHaltCpu();
  }
  
  VOID LOS_BackTrace(VOID)
  {
      LosTaskCB *runTask = OsCurrTaskGet();
      PrintExcInfo("runTask->taskName = %s\n", runTask->taskName);
      PrintExcInfo("runTask->taskId = %u\n", runTask->taskId);
      ArchBackTrace();
  }
  
  VOID LOS_TaskBackTrace(UINT32 taskID)
  {
      LosTaskCB *taskCB = NULL;
  
      if (taskID >= g_taskMaxNum) {
          PRINT_ERR("\r\nTask PID is invalid!\n");
          return;
      }
      taskCB = OS_TCB_FROM_TID(taskID);
      if ((taskCB->taskStatus & OS_TASK_STATUS_UNUSED) ||
          (taskCB->taskEntry == NULL) ||
          (taskCB->taskName == NULL)) {
          PRINT_ERR("\r\nThe task is not created!\n");
          return;
      }
      PRINTK("TaskName = %s\n", taskCB->taskName);
      PRINTK("TaskId = 0x%x\n", taskCB->taskId);
      ArchBackTraceWithSp(taskCB->stackPointer);
  }
  
  #ifdef __GNUC__
  /* stack protector */
  VOID __stack_chk_fail(VOID)
  {
      /* __builtin_return_address is a builtin function, building in gcc */
      LOS_Panic("stack-protector: Kernel stack is corrupted in: %p\n",
                __builtin_return_address(0));
  }
  #endif
  