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BX to non secure code region in the secure world

dnjsdnwja

I am wondering the behavior of Cortex-M33 if BX (not BXNS) is used to branch to non-secure code region.

Based on the reference manual of ARMv8-M, it seems a UsageFault will be caused. However, I am wondering whether it would be a Secure UsageFault or Non-Secure UsageFault.

Thanks in advance.