Vol. 3D 40-7

ENCLAVE EXITING EVENTS

(* Put the TCS LA into RBX for later use by ERESUME *)
RBX  CR_TCS_LA;

(* Put the AEP into RCX for later use by ERESUME *)
RCX  CR_TCS_PA.AEP;

(* Increment the SSA frame # *)
CR_TCS_PA.CSSA  CR_TCS_PA.CSSA + 1;

(* Restore XCR0 if needed *)
IF (CR4.OSXSAVE = 1)

THEN XCR0  CR_SAVE_XCR0; FI;

Un-suppress all code breakpoints that are outside ELRANGE

(* Update the thread context to show not in enclave mode *)
CR_ENCLAVE_MODE  0;

(* Assure consistent translations. *)
Flush linear context including TLBs and paging-structure caches

IF (CR_DBGOPTIN = 0)

THEN

Un-suppress all breakpoints that overlap ELRANGE
(* Clear suppressed breakpoint matches *)
Restore suppressed breakpoint matches
(* Restore TF *)
RFLAGS.TF  CR_SAVE_TF;
Un-suppress monitor trap flag;
Un-suppress branch recording facilities;
Un-suppress all suppressed performance monitoring activity;
Promote any sibling-thread counters that were demoted from AnyThread to MyThread during enclave 

entry back to AnyThread; 
FI;

IF the “monitor trap flag” VM-execution control is 1

THEN Pend MTF VM Exit at the end of exit; FI;

(* Clear low 12 bits of CR2 on #PF *)
IF (Exception code is #PF)

THEN CR2  CR2 & ~0xFFF; FI;

(* end_of_flow *)
(* Execution continues with normal event processing. *)