topic How to register AEP to handle AEX？ in Intel® Software Guard Extensions (Intel® SGX)

How to register AEP to handle AEX？

shen_y_ — Mon, 06 Feb 2017 02:13:01 GMT

Hi,

When app is executing in the enclave, can it be interrupted by system clock interrupts?

How to register an AEP , which is used as an EENTER parameter, to handle interrupts that caused enclave AEX? I've noted the sgx_register_exception_handler() api , but it's used to handle exceptions and registered in enclave. That's not what I need.

Thanks

The uRTS automatically

Juan_d_Intel — Thu, 09 Feb 2017 16:03:17 GMT

The uRTS automatically registers (or provides) the AEP for each enclave call (ECALL).

If an AEX happens, such as a clock interrupt, after the interrupt is served the OS will return control to the AEP, which will then ERESUME into the enclave.

The sgx_register_exception_handler() API is to register a routine that will handle exceptions inside the enclave, for instance if an enclave executes an illegal instruction such as CPUID.