On Fri, Dec 14, 2018 at 01:57:24PM -0800, Sean Christopherson wrote: > __vdso_sgx_enter_enclave() gets another rewrite, this time to strip > it down to the bare minimum and explicitly break compliance with the > x86-64 ABI. Feedback from v4 revealed that __vdso_sgx_enter_enclave() > would need to save (a lot) more than just the non-volatile GPRs to be > compliant with the x86-64 ABI, at which point breaking from the ABI > completely became much more palatable. > > The non-standard ABI also solves the question of "which GPRs should be > marshalled to/from the enclave" by getting out of the way entirely and > letting userspace have free reign (except for RSP, which has a big ol' > DO NOT TOUCH sign on it). Can you share a reference, or is this better documented in the accompanied patches? /Jarkko
