RE: [PATCH v15 01/26] Documentation/x86: Add CET description

[Nick Desaulniers]

(In response to https://lore.kernel.org/lkml/20201110162211.9207-2-yu-cheng.yu@xxxxxxxxx/)

> These need to be enabled to build a CET-enabled kernel, and Binutils v2.31
> and GCC v8.1 or later are required to build a CET kernel.

What about LLVM? Surely CrOS might be of interest to ship this on (we ship the
equivalent for aarch64 on Android).

> An application's CET capability is marked in its ELF header and can be
> verified from the following command output, in the NT_GNU_PROPERTY_TYPE_0
> field:
>
>     readelf -n <application> | grep SHSTK
>         properties: x86 feature: IBT, SHSTK

Same for llvm-readelf.