Cortex M33 Usage Fault

Kernel
1

Im getting a Usage Fault Accessing a virtual function (from the base class) .
S-Domain Exception from handler Mode
The SCB Fault Status Reg is 0.
If I access a base class function, it works fine.
It all seems very arm specific but are there any settings in FreeRTOS
that would affect or help me debug this problem.

thanks

2

Are the classes implemented in different security domains? You need to be careful about cross domain function calls.

3

Are you using MPU? Can you set configENABLE_MPU to 0 just for testing?

4

The intention is not to use any different security domains EnableTrustZone is 0 and FreeRTOS Secure is 1

5

Thanks. What about MPU?