linux-kernel - Re: [PATCH] objtool,x86: Verify poke_int3

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Message-ID: <87eeowbrto.fsf@nanos.tec.linutronix.de>
Date:   Mon, 27 Jul 2020 22:56:03 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     peterz@...radead.org, Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, mbenes@...e.cz
Subject: Re: [PATCH] objtool,x86: Verify poke_int3_handler() is self contained

peterz@...radead.org writes:
> Abuse the SMAP rules to ensure poke_int3_handler() doesn't call out to
> anything.

Yuck. Isn't that what noinstr is for or am I missing something?

Thanks,

        tglx