Auto merge of #101442 - joboet:null_check_tcs, r=thomcc

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Check if TCS is a null pointer on SGX

The `EENTER` instruction only checks if the TCS is aligned, not if it zero. Saying the address returned is a `NonNull<u8>` (for which `Tcs` is a type alias) is unsound. As well-behaved runners will not put the TCS at address zero, so the definition of `Tcs` is correct. However, `std` should check the address before casting it to a `NonNull`.

ping `@jethrogb` `@raoulstrackx`
`@rustbot` label I-unsound

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bors 2022-09-11 22:19:24 +00:00

parent d928f0c86c 1e705619d5

commit de9cac81e0

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