linux-kernel - Re: [RFC][PATCH] objtool: WARN about ENDBR instructions

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Message-ID: <20210210160945.73n5zhlfcii5t637@treble>
Date:   Wed, 10 Feb 2021 10:09:45 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
        yu-cheng.yu@...el.com
Subject: Re: [RFC][PATCH] objtool: WARN about ENDBR instructions

On Wed, Feb 10, 2021 at 09:39:53AM +0100, Peter Zijlstra wrote:
> 
> 
> Given all the ENDBR fun we recently had, do we want the below? Until
> someone comes and fixes up kprobes/ftrace/livepatch etc.. having them is
> a giant pain and we'd better warn about it.

Meh...

Is there a point in doing this, now that we killed it with
-fcf-protection=none?

That said, the patch is nicely small and localized.

-- 
Josh