linux-hardening - Re: [PATCH v5 09/15] x86: Use an opaque type for functions not callable from C

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Message-ID: <20211014145211.573579e6@gandalf.local.home>
Date:   Thu, 14 Oct 2021 14:52:11 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Borislav Petkov <bp@...en8.de>,
        Sami Tolvanen <samitolvanen@...gle.com>, x86@...nel.org,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH v5 09/15] x86: Use an opaque type for functions not
 callable from C

On Thu, 14 Oct 2021 11:47:01 -0700
Kees Cook <keescook@...omium.org> wrote:

> On Thu, Oct 14, 2021 at 07:31:26PM +0200, Borislav Petkov wrote:
> > On Thu, Oct 14, 2021 at 09:07:57AM -0700, Kees Cook wrote:
> > Looking at the changelog, DECLARE_ASM_FUNC_SYMBOL, makes a lot more
> > sense to me even if it doesn't specify the aspect that it is not called
> > by C but who cares - it is generic enough.  
> 
> Around we go. :) Josh[1] and Steven[2] explicitly disagreed with
> that name, leading to the current name[3]. Do you want it to be
> DECLARE_ASM_FUNC_SYMBOL() over those objections?

Just note, that I was fine with the original name, but was against the
version Josh suggested ;-)

> 
> I'd really like to finish this shed -- I need to take the bikes in from
> the rain. :P

Back to black it is!

-- Steve