41-68 Vol. 3D

SGX INSTRUCTION REFERENCES

(* Check consistency of FS & GS Limit *)
IF ( (TMP_SECS.ATTRIBUTES.MODE64BIT is 0) and ((DS:RCX.FSLIMIT & FFFH ≠ FFFH) or (DS:RCX.GSLIMIT & FFFH ≠ FFFH)) )

THEN #GP(0); FI;

(* Clear PENDING/MODIFIED flags to mark accept operation complete *)
EPCM(DS:RCX).PENDING  0;
EPCM(DS:RCX).MODIFIED  0;
EPCM(DS:RCX).PR  0;

(* Clear EAX and ZF to indicate successful completion *)
RFLAGS.ZF  0;
RAX  0;

DONE:
RFLAGS.CF,PF,AF,OF,SF  0;

Flags Affected

Sets ZF if page cannot be accepted, otherwise cleared. Clears CF, PF, AF, OF, SF

Protected Mode Exceptions

#GP(0)

If a memory operand effective address is outside the DS segment limit.
If a memory operand is not properly aligned.
If a memory operand is locked.

#PF(error code)

If a page fault occurs in accessing memory operands.
If a memory operand is not an EPC page.
If EPC page has incorrect page type or security attributes.

64-Bit Mode Exceptions

#GP(0)

If a memory operand is non-canonical form.
If a memory operand is not properly aligned.
If a memory operand is locked.

#PF(error code)

If a page fault occurs in accessing memory operands.
If a memory operand is not an EPC page.
If EPC page has incorrect page type or security attributes.