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Disable stack overflow check for MPU ports (#1231)

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Disable stack overflow check for MPU ports

Stack overflow check is not straight forward to implement for MPU ports
because of the following reasons:
1. The context is stroed in TCB and as a result, pxTopOfStack member
   points to the context location in TCB.
2. System calls are executed on a separate privileged only stack.

It is still okay because an MPU region is used to protect task stack
which means task stack overflow will trigger an MPU fault.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
This commit is contained in:
Gaurav-Aggarwal-AWS 2025-02-24 21:54:15 +05:30 • committed by GitHub
parent 1a1ae36f9a
commit df0aa5a815
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23 changed files with 41 additions and 149 deletions
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5
portable/GCC/ARM_CM33/non_secure/portmacrocommon.h
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@ -217,11 +217,6 @@ extern void vClearInterruptMask( uint32_t ulMask ) /* __attribute__(( naked )) P
#error configSYSTEM_CALL_STACK_SIZE must be defined to the desired size of the system call stack in words for using MPU wrappers v2.
#endif
/* When MPU wrapper v2 is used, the task's context is stored in TCB and
* pxTopOfStack member of TCB points to the context location in TCB. We,
* therefore, need to read PSP to find the task's current top of stack. */
#define portGET_CURRENT_TOP_OF_STACK( pxCurrentTopOfStack ) { __asm volatile ( "mrs %0, psp" : "=r" ( pxCurrentTopOfStack ) ); }
/**
* @brief System call stack.
*/