linux-kernel - Re: [PATCH] binfmt_elf: fix PIE load with randomization disabled

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Message-ID: <52A6389E.90404@zytor.com>
Date:	Mon, 09 Dec 2013 13:39:42 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"H.J. Lu" <hjl.tools@...il.com>, Jiri Kosina <jkosina@...e.cz>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Josh Boyer <jwboyer@...hat.com>
Subject: Re: [PATCH] binfmt_elf: fix PIE load with randomization disabled

On 12/09/2013 01:03 PM, H.J. Lu wrote:
> 
> No, please don't do that.  Normally, PIE has zero load address and kernel
> can load it anywhere.  There are multiple reasons why PIE has non-zero
> load address.  Saying you need to load a program above 4GB under x86-64,
> you can't do that with normal dynamic executable.  PIE with non-zero load
> address is the only way to do that on x86-64.
> 

Why does it have to be PIE?

	-hpa


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