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diff --git a/nuttx/arch/arm/src/armv7-m/up_switchcontext.S b/nuttx/arch/arm/src/armv7-m/up_switchcontext.S
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-/************************************************************************************
- * arch/arm/src/armv7-m/up_switchcontext.S
- *
- * Copyright (C) 2009-2011 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * 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 NuttX 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 OWNER 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.
- *
- ************************************************************************************/
-
-/************************************************************************************
- * Included Files
- ************************************************************************************/
-
-#include <nuttx/config.h>
-#include <arch/irq.h>
-
-#include "nvic.h"
-#include "svcall.h"
-
-/************************************************************************************
- * Pre-processor Definitions
- ************************************************************************************/
-
-/************************************************************************************
- * Global Symbols
- ************************************************************************************/
-
- .syntax unified
- .thumb
- .file "up_switchcontext.S"
-
-/************************************************************************************
- * Macros
- ************************************************************************************/
-
-/************************************************************************************
- * Public Functions
- ************************************************************************************/
-
-/************************************************************************************
- * Name: up_switchcontext
- *
- * Description:
- * Save the current thread context and restore the specified context.
- * Full prototype is:
- *
- * void up_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
- *
- * Return:
- * None
- *
- ************************************************************************************/
-
- .thumb_func
- .globl up_switchcontext
- .type up_switchcontext, function
-up_switchcontext:
-
- /* Perform the System call with R0=1, R1=saveregs, R2=restoreregs */
-
- mov r2, r1 /* R2: restoreregs */
- mov r1, r0 /* R1: saveregs */
- mov r0, #SYS_switch_context /* R0: context switch */
- svc 0 /* Force synchronous SVCall (or Hard Fault) */
-
- /* This call should not return */
-
- bx lr /* Unnecessary ... will not return */
- .size up_switchcontext, .-up_switchcontext
- .end
-