linux-kernel - Re: [PATCH] x86, relocs: move ELF relocation handling to C

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Message-ID: <CAOJsxLHW6JE81hBWM2UEWbCLQtyhRok0YWtF=CRPBjTbfYagXw@mail.gmail.com>
Date:	Wed, 12 Jun 2013 09:27:57 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86 maintainers <x86@...nel.org>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Matt Fleming <matt.fleming@...el.com>,
	Alexander Duyck <alexander.h.duyck@...el.com>
Subject: Re: [PATCH] x86, relocs: move ELF relocation handling to C

Hello Kees,

On Tue, Jun 11, 2013 at 9:58 PM, Kees Cook <keescook@...omium.org> wrote:
> Moves the relocation handling into C, after decompression. This requires
> that the decompressed size is passed to the decompression routine as
> well so that relocations can be found. Only kernels that need relocation
> support will use the code.
>
> Based on work by Neill Clift and Michael Davidson.
>
> Signed-off-by: Kees Cook <keescook@...omium.org>

How does the kernel benefit from this? Are there problems with the current
assembly code? Are you planning to improve the relocation code?

                        Pekka
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