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bsps/arm: Set MSP in ARMv7-M start code

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Set the Main Stack Pointer (MSP) to the ISR stack area end just in case
we run using the Process Stack Pointer (PSP).  This helps if
applications are started by a boot loader.
This commit is contained in:
Sebastian Huber
2021-04-16 07:50:21 +02:00
parent 51defd9274
commit 2a24f99d11
1 changed files with 8 additions and 0 deletions
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8
bsps/arm/shared/start/start.S
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@@ -553,6 +553,14 @@ _start:
#endif
ldr sp, =_ISR_Stack_area_end
/*
* Set the Main Stack Pointer (MSP) to the ISR stack area end just in
* case we run using the Process Stack Pointer (PSP).
*/
mov r0, sp
msr msp, r0
ldr lr, =bsp_start_hook_0_done + 1
b bsp_start_hook_0