linux-kernel - Re: [PATCH] ld.so on FC7 is mmap'ing shared libraries right in over guest memory.

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Message-Id: <1186670916.4521.1.camel@laptopd505.fenrus.org>
Date:	Thu, 09 Aug 2007 07:48:36 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	ron minnich <rminnich@...il.com>, lguest <lguest@...abs.org>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ld.so on FC7 is mmap'ing shared libraries right in
	over guest memory.

On Thu, 2007-08-09 at 21:07 +1000, Rusty Russell wrote:
> From: Ronald G. Minnich <rminnich@...il.com>
> 
> [ FC7 maps shared libraries very low, where the launcher maps guest's
> physical memory.  Quick fix is to link Launcher static, real fix is for
> 2.6.24. ]
> 
> -static is a simple fix. I expect this problem will be more common than we
> like, as different distro's make different "improvements" to ld.so


this description is incorrect; it's not an ld.so change that causes the
low mapping.

It's a command line option to the prelink program (which is in most
distributions) that makes it use the entire address space, not just the
higher bits....



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