mirror of
https://github.com/GorgonMeducer/perf_counter.git
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47 lines
2.2 KiB
ArmAsm
47 lines
2.2 KiB
ArmAsm
;/****************************************************************************
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;* Copyright 2021 Gorgon Meducer (Email:embedded_zhuoran@hotmail.com) *
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;* *
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;* Licensed under the Apache License, Version 2.0 (the "License"); *
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;* you may not use this file except in compliance with the License. *
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;* 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, *
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;* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
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;* See the License for the specific language governing permissions and *
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;* limitations under the License. *
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;* *
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;****************************************************************************/
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PRESERVE8
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THUMB
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AREA |.text|, CODE, READONLY
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|$Sub$$SysTick_Handler| PROC
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EXPORT |$Sub$$SysTick_Handler|
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IMPORT user_code_insert_to_systick_handler
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IMPORT |$Super$$SysTick_Handler|
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push {r4, r5}
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push {r4, lr}
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LDR R0, =user_code_insert_to_systick_handler
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BLX R0
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pop {r4, r5}
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mov lr, r5
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pop {r4, r5}
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LDR R0, =|$Super$$SysTick_Handler|
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BX R0
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ENDP
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ALIGN
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AREA |.text|, CODE, READONLY
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__ensure_systick_wrapper PROC
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EXPORT __ensure_systick_wrapper
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NOP
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BX LR
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ENDP
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END |