Read information for last unexpected abort (data or prefetch)
=> R0 = 7 (reason code)
<= R0 = /preserved/
R1 = 32-bit PC for last abort
R2 = 32-bit PSR for last abort
R3 = fault address for last abort
The fault address is the same as the 32-bit PC for a prefetch abort, but is the address that caused the abort for a data abort.
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