1/**************************************************************************/
2/*                                                                        */
3/*       Copyright (c) Microsoft Corporation. All rights reserved.        */
4/*                                                                        */
5/*       This software is licensed under the Microsoft Software License   */
6/*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
7/*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
8/*       and in the root directory of this software.                      */
9/*                                                                        */
10/**************************************************************************/
11
12
13/**************************************************************************/
14/**************************************************************************/
15/**                                                                       */
16/** ThreadX Component                                                     */
17/**                                                                       */
18/**   Thread                                                              */
19/**                                                                       */
20/**************************************************************************/
21/**************************************************************************/
22
23#ifdef TX_INCLUDE_USER_DEFINE_FILE
24#include "tx_user.h"
25#endif
26
27    EXTERN  _tx_execution_isr_enter
28    SECTION `.text`:CODE:NOROOT(2)
29    THUMB
30/**************************************************************************/
31/*                                                                        */
32/*  FUNCTION                                               RELEASE        */
33/*                                                                        */
34/*    _tx_thread_context_save                          Cortex-Mx/IAR      */
35/*                                                           6.3.0        */
36/*  AUTHOR                                                                */
37/*                                                                        */
38/*    Scott Larson, Microsoft Corporation                                 */
39/*                                                                        */
40/*  DESCRIPTION                                                           */
41/*                                                                        */
42/*    This function is only needed for legacy applications and it should  */
43/*    not be called in any new development on a Cortex-M.                 */
44/*                                                                        */
45/*  INPUT                                                                 */
46/*                                                                        */
47/*    None                                                                */
48/*                                                                        */
49/*  OUTPUT                                                                */
50/*                                                                        */
51/*    None                                                                */
52/*                                                                        */
53/*  CALLS                                                                 */
54/*                                                                        */
55/*    [_tx_execution_isr_enter]             Execution profiling ISR enter */
56/*                                                                        */
57/*  CALLED BY                                                             */
58/*                                                                        */
59/*    ISRs                                                                */
60/*                                                                        */
61/*  RELEASE HISTORY                                                       */
62/*                                                                        */
63/*    DATE              NAME                      DESCRIPTION             */
64/*                                                                        */
65/*  06-02-2021      Scott Larson            Initial Version 6.1.7         */
66/*  10-31-2023      Tiejun Zhou             Included tx_user.h,           */
67/*                                            resulting in version 6.3.0  */
68/*                                                                        */
69/**************************************************************************/
70// VOID   _tx_thread_context_save(VOID)
71// {
72    PUBLIC  _tx_thread_context_save
73_tx_thread_context_save:
74
75#if (defined(TX_ENABLE_EXECUTION_CHANGE_NOTIFY) || defined(TX_EXECUTION_PROFILE_ENABLE))
76    /* Call the ISR enter function to indicate an ISR is starting.  */
77    PUSH    {r0, lr}                                // Save return address
78    BL      _tx_execution_isr_enter                 // Call the ISR enter function
79    POP     {r0, lr}                                // Recover return address
80#endif
81
82    /* Context is already saved - just return.  */
83
84    BX      lr
85// }
86    END
87