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SVC instruction execution inside the hard fault handler

Hello everyone,

Processor : Arm Cortex-m4

For an experiment, I purposely triggering hard fault exception, by making T-bit in Execution Program Status Register to 0. The program execution control reaches hard fault handler.

Inside the hard fault handler I was triggering SVC instruction using "__asm volatile ("SVC #0");". After executing this line, system goes reset. 

May I know the reason.