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Message-ID: <56558826.1060202@ladisch.de>
Date: Wed, 25 Nov 2015 11:06:30 +0100
From: Clemens Ladisch <clemens@...isch.de>
To: Mathias Krause <minipli@...glemail.com>,
kernel-hardening@...ts.openwall.com
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Kees Cook <keescook@...omium.org>, Andy Lutomirski <luto@...capital.net>,
Ingo Molnar <mingo@...hat.com>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>, x86-ml <x86@...nel.org>,
Arnd Bergmann <arnd@...db.de>, Michael Ellerman <mpe@...erman.id.au>,
linux-arch@...r.kernel.org, PaX Team <pageexec@...email.hu>,
Emese Revfy <re.emese@...il.com>
Subject: Re: [PATCH 0/2] introduce post-init read-only
memory
Mathias Krause wrote:
> [...]
> So, prior extending the usage of the __read_only annotation some
> toolchain support is needed. Maybe a gcc plugin that'll warn/error on
> code that writes to such a variable but is not __init itself.
Or mark them as "const". This would require the initialization code to
cast it away, probably with a helper macro.
Regards,
Clemens
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