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

Yu, Yu-cheng
2020-11-30T18:35:24Z

On 11/30/2020 10:26 AM, Nick Desaulniers wrote:
> (In response to https://lore.kernel.org/lkml/20201110162211.9207-2-yu-cheng.yu@intel.com/)
>
>> 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).
>

I have not built with LLVM, but think it probably will work as well. I
will test it.

>> 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.
>

I will add that to the document.

Thanks,
Yu-cheng