When high exception vectors are not selected, the VBAR holds the exception base address for exceptions that are not taken to Monitor mode or to Hyp mode.

Bits	Name	Function
[31:5]	VBA	Bits[31:5] of the base address of the low exception vectors.
[4:0]	-	Reserved.

Consider using __get_VBAR and __set_VBAR for accessing this register.