Compatibility with Linux 6.5 and later about sgx-step HOT 5 CLOSED

It also compiles and loads on 6.2, 6.5 and 6.7, and it works on 6.5 (for my use-case, single-stepping was not tested, only page table manipulation).

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Relevant kernel commits:

• torvalds/linux@0d940a9
• torvalds/linux@1687d8a

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thanks for the report! I'll try to look into this next week. It looks like some of the symbols are not exported (anymore) for reference in kernel modules.

Likely will need to replace the call with pte_offset_kernel and apic->read/write probably.. (even better may be to not rely on kernel helper functions but implement the page-table walk logic manually instead..)

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@Danacus I implemented a quick fix on the branch referenced above. I don't have access to a recent Linux kernel atm but I think this should do the job. Can you test and let me know if it compiles/loads/works?

For refernce: this compiles and loads for me on Linux 5.15 and 6.2.0 (didn't test running it though!)

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fix should be good, merged this upstream

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