Date: Tue, 12 Jul 2016 23:08:53 +0100 From: Russell King - ARM Linux <linux@...linux.org.uk> To: Kees Cook <keescook@...omium.org> Cc: Emese Revfy <re.emese@...il.com>, "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, PaX Team <pageexec@...email.hu>, Brad Spengler <spender@...ecurity.net>, Michal Marek <mmarek@...e.com>, LKML <linux-kernel@...r.kernel.org>, Masahiro Yamada <yamada.masahiro@...ionext.com>, linux-kbuild <linux-kbuild@...r.kernel.org>, minipli@...linux.so, Catalin Marinas <catalin.marinas@....com>, Rasmus Villemoes <linux@...musvillemoes.dk>, David Brown <david.brown@...aro.org>, "benh@...nel.crashing.org" <benh@...nel.crashing.org>, Thomas Gleixner <tglx@...utronix.de>, Andrew Morton <akpm@...ux-foundation.org>, Jeff Layton <jlayton@...chiereds.net>, Arnd Bergmann <arnd@...db.de>, Sam Ravnborg <sam@...nborg.org>, Karsten Keil <isdn@...ux-pingi.de> Subject: Re: [PATCH v2 1/3] Add the initify gcc plugin On Tue, Jul 12, 2016 at 03:45:56PM -0400, Kees Cook wrote: > On Mon, Jul 4, 2016 at 7:40 PM, Emese Revfy <re.emese@...il.com> wrote: > > If a function is called by __init and __exit functions as well then > > the plugin moves it to the __exit section. This causes false positive > > section mismatch errors/warnings that I don't know how to handle yet. > > Should the mismatch checker be updated to recognize this case? Without > the plugin, I assume these kinds of functions would only ever be > marked for __exit? If so, should the plugin strip the __init marking > and only add __exit? That sounds like a problem for architectures that still discard the __exit section at link time to reduce the size of the linked kernel image - though, obviously, if using the plugin results in a smaller kernel image _with_ the exit sections, then there's a net benefit size-wise. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.
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