linux-kernel - Re: [RFC, PATCH] Fixup COMPAT_VDSO to work with CONFIG

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Date:	Fri, 16 Mar 2007 00:41:38 -0800
From:	Zachary Amsden <zach@...are.com>
To:	Jan Beulich <jbeulich@...ell.com>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>, Ingo Molnar <mingo@...e.hu>,
	Virtualization Mailing List <virtualization@...ts.osdl.org>,
	Andrew Morton <akpm@...l.org>,
	Linus Torvalds <torvalds@...l.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Chris Wright <chrisw@...s-sol.org>, Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [RFC, PATCH] Fixup COMPAT_VDSO to work with	CONFIG_PARAVIRT

Jan Beulich wrote:
>> So I guess the right thing to do is relocate the dynamic stuff via
>> PT_DYNAMIC, and relocate the symtab if its present.
>>     
>
> Symtab should also be deduced from program headers.
>   

Learning more all the time..

> I'm actually surprised this got re-implemented from scratch, when my patch
> already had both variants (one just #ifdef-ed out), and was tested in both
> forms (actually, I first implemented the ELF form, and only after seeing the
> bloat it added to the sources I came up her than with the second variant, which in
> the end unfortunately didn't add significantly less bloat to the Makefile.
>   

This wasn't re-implemented from scratch - I did this in another lifetime:

http://lists.xensource.com/archives/html/xen-devel/2005-08/msg00284.html

Either way of doing things is fine with me - I would just prefer that if 
it has to get down and dirty, we do it in source rather than hidden in a 
makefile.  But just a personal preference.

Zach
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