linux-hardening - Re: [RFC PATCH 00/17] objtool: add base support for arm64

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Message-ID: <YAlkOFwkb6/hFm1Q@hirez.programming.kicks-ass.net>
Date:   Thu, 21 Jan 2021 12:23:36 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     Julien Thierry <jthierry@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Mark Brown <broonie@...nel.org>,
        linux-efi <linux-efi@...r.kernel.org>,
        linux-hardening@...r.kernel.org
Subject: Re: [RFC PATCH 00/17] objtool: add base support for arm64

On Thu, Jan 21, 2021 at 12:08:23PM +0100, Ard Biesheuvel wrote:
> On Thu, 21 Jan 2021 at 11:26, Julien Thierry <jthierry@...hat.com> wrote:

> > I'm not familiar with toolcahin code models, but would this approach be
> > able to validate assembly code (either inline or in assembly files?)
> >
> 
> No, it would not. But those files are part of the code base, and can
> be reviewed and audited.

x86 has a long history if failing at exactly that.