Re: [PATCH v13 7/8] x86/vdso: Insert endbr32/endbr64 to vDSO
From: Andy Lutomirski <luto@kernel.org>
Date: 2020-09-25 16:18:57
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On Fri, Sep 25, 2020 at 7:58 AM Yu-cheng Yu [off-list ref] wrote:
From: "H.J. Lu" <redacted> 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>