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GETSECEXITAC

GETSECEXITAC is used to exit the Enclave Dynamic Memory Management (EDMM) state. It clears the internal state associated with the current enclave's dynamic memory management and returns the processor to a state where further dynamic memory operations are disallowed until another GETSEC operation is performed.

The table after the description covers what the source and destinations can be.

DO NOT support LOCK

This instruction is only available when the processor is executing in 64-bit mode. It SHALL only be executed within an enclave; if executed outside of an enclave, it will result in a general protection fault (#GP).

To avoid unexpected #GP exceptions, the software MUST verify that the processor supports the SGX (Software Guard Extensions) feature and that the current execution context is within a valid enclave prior to invoking this instruction.