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Date:   Tue, 20 Apr 2021 09:19:04 +0200
From:   Peter Zijlstra <>
To:     Sami Tolvanen <>
Cc:     X86 ML <>, Kees Cook <>,
        Josh Poimboeuf <>,
        Nathan Chancellor <>,
        Nick Desaulniers <>,
        Sedat Dilek <>,,
        LKML <>,
        clang-built-linux <>
Subject: Re: [PATCH 09/15] x86/alternatives: Use C int3 selftest but disable

On Mon, Apr 19, 2021 at 08:26:36AM -0700, Sami Tolvanen wrote:
> On Sat, Apr 17, 2021 at 4:37 AM Peter Zijlstra <> wrote:

> > The problem is that the call-site does not respect the regular calling
> > convention, so calling a regular C function is just asking for trouble,
> > which is why it ended up being asm, then we fully control the calling
> > convention.
> Ack. The problem here is that we can't declare an extern static
> function in C. How would you feel about making int3_magic a global
> instead to match the C declaration?

Works for me.

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