Re: [PATCH v5 08/13] selftests/sgx: Handle relocations in test enclave

[Jo Van Bulck]

On 01.09.23 01:13, Huang, Kai wrote:
> > encl_body:
> >      /* snipped */
> >      lea    encl_op_array(%rip), %rcx
> >      lea    __encl_base(%rip), %rax
> >      add    (%rcx,%rdx,8),%rax
> >      jmp    *%rax
>
> call *%rax
>
> ?
>
> >      ret

Good catch, but this is indeed the code as generated with gcc -Os (for 
readability). It seems the compiler choose a JMP over a CALL (as the 
stack is untouched and the callee can immediately return to the caller).

Somehow, the compiler still emits a RET after the JMP (which is not 
supposed to return here) though. I agree this is unnecessarily confusing 
and can simply remove the RET from the commit message.

Best,
Jo