linux-kernel - Re: [PATCH 1/2] Define the EF_AS_NO_RANDOM e

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Message-ID: <873b618l50.wl@betelheise.deep.net>
Date:	Wed, 24 Jan 2007 00:54:03 +0300
From:	Samium Gromoff <_deepfire@...lingofgreen.ru>
To:	Jakub Jelinek <jakub@...hat.com>
Cc:	Samium Gromoff <_deepfire@...lingofgreen.ru>,
	Alan <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] Define the EF_AS_NO_RANDOM e_flag bit

At Tue, 23 Jan 2007 16:16:12 -0500,
Jakub Jelinek wrote:
> 
> On Wed, Jan 24, 2007 at 12:06:45AM +0300, Samium Gromoff wrote:
> > Should we introduce per-arch asm/elf.h files to hold the relevant flag definitions then?
> 
> On some architectures there are no bits left.  On others you'd need to go
> through whomever maintains the relevant psABI to get a bit officially
> allocated.  Really, it is very bad idea to use e_flags for this.

Currently arch_align_stack() and mmap_base() perform randomisation only on x86
and x86_64, so it is only two architectures anyway...

> If all you care about is running setuid LISP programs, you'd much better put
> your energy into fixing the buggy ELF dumper in it.
> 
> 	Jakub

regards, Samium Gromoff
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