[Sifive E21] Unregister existing vector handler and register a new one

HiFive Unmatched
1

Hi,

I’m using Sifive E21 single hart processor. I’m registering an ISR for I3C in the bootloader. After jumping to the actual firmware, I want to use a different handler for this. So, I want to un-register existing one and register the new handler. For this, I don’t see any existing functions in e21_sdk for unregistering vector handlers. Is there any way we could do this?

I tried directly registering the new handler without un-registering but it’s not working.

Thanks and Regards,
Kurra Aravind Kumar Goud.