V2.0.0-perview supports Intel Linux SGX SDK 2.21 or later

[yangfh2004]

The V2.0.0 preview only supports Intel's SGX SDK 2.17.1, which does not support Ubuntu 22.04. We are looking forward to supporting newer versions of Intel's SGX SDK so that we have supports to the latest kernel, tool chains and DCAP drivers.

We are experimenting with the support on version 2.21 on our fork

The helloworld demo compiled OK but have issues with a segmentation fault on TCS initiation while it creates and memset a new piece of memory inside the enclave for a new TCS. We haven't digged into the root cause but it seems that there might be some difference in memory management in the newer version.

The same segmentation fault happens in all modes, including HW and SIM with or without optimization libraries. Since the memset function is provided by Intel, I don't believe the root cause is the fast or regular memset.

Where it crashes in the SIM mode, it will also crash in the HW mode at the same line of code.

Where it crashes the enclave with regular memset

Where it crashes the enclave with fast memset

[yangfh2004]

@volcano0dr please take a look at our fork branch and your suggestions are welcome, thanks.

[yangfh2004]

I see the typedef struct _thread_data_t has changes and would result different mapping in into the rust struct, which I believe might be the root cause of the problem.

[yangfh2004]

I fixed it by updating the Tds struct in the global data

[yangfh2004]

Still have some problems with heap allocation since the EDMM is missing. Please review our fork and leave comments so that we can improve, thanks!

[ClawSeven]

Hi, @yangfh2004, you could update the intel sgx sdk version with this script.