This content has not been validated; it was AI-generated following the x86-64 ISA Documentation generation process to maintain high quality. However, as no human has verified this data, errors may exist. If the accuracy of this data is critical, please consult the Intel SDM. The model used to generate this is gemma4:31b

ENCLSELDB

Loads a data value from a memory location into a register, specifically used within the Enclave Page Cache (EPC) to retrieve encrypted data.

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 operating in CPL 3 and is specifically designed for use within Intel SGX enclaves. It SHALL only be executed inside an enclave; executing this instruction outside of an enclave context results in a general protection fault (#GP).

The memory operand MUST be a valid address within the Enclave Page Cache (EPC). If the memory access violates the enclave's access control or the address is not mapped to the EPC, the instruction SHALL trigger a page fault or a general protection fault. Failure to ensure the memory operand is aligned to the size of the data being loaded MAY result in alignment check exceptions depending on the CR0.AC setting.