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SubjectRe: [PATCH v29 00/20] Intel SGX foundations
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On 5/7/20 11:06 AM, Dr. Greg wrote:
> On Wed, May 06, 2020 at 09:39:55AM -0700, Jordan Hand wrote:
>
> Good afternoon, I hope the week is going well for everyone.
>
>> On 4/21/20 2:52 PM, Jarkko Sakkinen wrote:
>>> Make the vDSO callable directly from C by preserving RBX and taking leaf
>>> from RCX.
>
>> Tested with the Open Enclave SDK on top of Intel PSW. Specifically built
>> the Intel PSW with changes to support /dev/sgx mapping[1] new in v29.
>>
>> Tested-by: Jordan Hand <jorhand@linux.microsoft.com>
>>
>> [1] https://github.com/intel/linux-sgx/pull/530
>
> Did you re-wire your SDK to convert all your ECALL and exception
> handling to the new VDSO architecture?
>

No. We have many users of our SDK who rely on the out-of-tree driver and
will for the foreseeable future. I aim to support both in-tree and
out-of-tree with minimal code diff.

>
> Failures in enclave loading and initialization demonstrate themselves
> pretty clearly and are in the domain of the PSW being used. If there
> are going to be subtle SGX application operability issues that need to
> be found they will be in the new ECALL and exception handling
> mechanisms.

Fair enough, no I have not tested those mechanisms. Apologies, I should
have removed that line from the quoted text.

-Jordan

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