Index

ERET

Exception Return using the ELR and SPSR for the current Exception level. When executed, the PE restores PSTATE from the SPSR, and branches to the address held in the ELR.

The PE checks the SPSR for the current Exception level for an illegal return event. See Illegal return events from AArch64 state.

ERET is UNDEFINED at EL0.

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 1 0 1 0 1 1 0 1 0 0 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0
A M Rn op4

ERET

if PSTATE.EL == EL0 then UNDEFINED;

Operation

AArch64.CheckForERetTrap(FALSE, TRUE);
bits(64) target = ELR_ELx[];

AArch64.ExceptionReturn(target, SPSR_ELx[]);