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SubjectRe: [PATCH v13 7/8] x86/vdso: Insert endbr32/endbr64 to vDSO
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On 9/25/2020 9:18 AM, Andy Lutomirski wrote:
> On Fri, Sep 25, 2020 at 7:58 AM Yu-cheng Yu <yu-cheng.yu@intel.com> wrote:
>>
>> From: "H.J. Lu" <hjl.tools@gmail.com>
>>
>> When Indirect Branch Tracking (IBT) is enabled, vDSO functions may be
>> called indirectly, and must have ENDBR32 or ENDBR64 as the first
>> instruction. The compiler must support -fcf-protection=branch so that it
>> can be used to compile vDSO.
>
> Acked-by: Andy Lutomirski <luto@kernel.org>
>

Thanks!

Yu-cheng

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