linux-kernel - Re: RFC: binutils PATCH: Set e_type to ET

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Message-ID: <52A766A4.7040202@zytor.com>
Date:	Tue, 10 Dec 2013 11:08:20 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"H.J. Lu" <hjl.tools@...il.com>
CC:	Binutils <binutils@...rceware.org>, Jiri Kosina <jkosina@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>,
	Josh Boyer <jwboyer@...hat.com>
Subject: Re: RFC: binutils PATCH: Set e_type to ET_EXEC for -pie -Ttext-segment=

On 12/10/2013 04:20 AM, H.J. Lu wrote:
> On Mon, Dec 9, 2013 at 8:57 PM, H. Peter Anvin <hpa@...or.com> wrote:
>> Where do the _32 and _32S relocations come from?  Are we mixing multiple things inside -pie?
> 
> They come from crt1.o and crtbegin.o.  -pie uses Scrt1.o and crtbeginS.o.
> 

OK, so this is fundamentally an issue with the gcc wrapper... there
isn't a way to get the relocatable crt files without telling the linker
to link PIE (except perhaps using some -Wl option, maybe "-Wl,-no-pie"?)

Either way, if the *only* goal is to get the file above a certain point,
like 4 GiB, then there is no reason not to randomize upward.

	-hpa




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