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85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/****************************************************************************
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* arch/arm/src/common/arm_exit.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <debug.h>
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#include <sched.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.h>
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#include "task/task.h"
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#include "sched/sched.h"
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#include "group/group.h"
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#include "irq/irq.h"
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#include "arm_internal.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_exit
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*
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* Description:
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* This function causes the currently executing task to cease
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* to exist. This is a special case of task_delete() where the task to
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* be deleted is the currently executing task. It is more complex because
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* a context switch must be perform to the next ready to run task.
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*
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****************************************************************************/
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void up_exit(int status)
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{
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/* Destroy the task at the head of the ready to run list. */
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nxtask_exit();
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/* Update g_running_tasks */
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#ifdef CONFIG_ARCH_ARMV6M
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/* ARMV6M syscal may trigger hard fault， We use
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* running_task != NULL to determine whether it is
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* a context for restoration.
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*/
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g_running_tasks[this_cpu()] = NULL;
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#else
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g_running_tasks[this_cpu()] = this_task();
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#endif
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/* Then switch contexts */
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arm_fullcontextrestore();
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/* arm_fullcontextrestore() should not return but could if the software
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* interrupts are disabled.
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*/
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PANIC();
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}
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