linux-kernel - RE: [PATCH] x86: Remove a.out support

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Message-ID: <4880a8eeb54d486ca7d3247821dbc8a9@AcuMS.aculab.com>
Date:   Thu, 17 Mar 2022 02:08:31 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'James Jones' <linux@...innocuous.com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>
CC:     Borislav Petkov <bp@...en8.de>,
        the arch/x86 maintainers <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] x86: Remove a.out support

From: James Jones
> Sent: 17 March 2022 02:05
> 
> On 3/16/22 3:30 PM, Kees Cook wrote:
> > On Wed, Mar 16, 2022 at 01:38:31PM +0100, Arnd Bergmann wrote:
> >> is in the end, but it's likely easier than a standalone a.out loader
> >> in user space, or a conversion to ELF format.
> >
> > Yeah, the exec format is really simple. The only tricky bit was preparing
> > the stack and making sure everything landed in the right place for text
> > and data. James, can you try this? aln and mac run for me, but I'm not
> > actually exercising them beyond dumping argument lists, etc:
> >
> > https://github.com/kees/kernel-tools/tree/trunk/a.out
> 
> Yes, works perfectly, thank you. I like the idea of using this much
> better than getting emailed every time someone wants to delete the a.out
> code again. Consider my use case withdrawn. I've already pushed an
> update to my jaguar-sdk project to use this tool instead.

Just every time the someone wants to delete the associated
system calls :-)

	David

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