linux-kernel - Re: [PATCH] FDPIC: Ignore the loader's PT_GNU

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Message-ID: <24530.1247050900@redhat.com>
Date:	Wed, 08 Jul 2009 12:01:40 +0100
From:	David Howells <dhowells@...hat.com>
To:	Pavel Machek <pavel@....cz>
Cc:	dhowells@...hat.com, vapier.adi@...il.com,
	rgetz@...ckfin.uclinux.org, lethal@...ux-sh.org, gerg@...inux.org,
	uclinux-dist-devel@...ckfin.uclinux.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] FDPIC: Ignore the loader's PT_GNU_STACK when calculating the stack size

Pavel Machek <pavel@....cz> wrote:

> The patch seems wrong to me; loader needs the stack, too, right?
> 
> What about making sure that the loader specifies reasonable stack
> size, instead?

The loader doesn't need its own stack, unless it _is_ the executable.  It uses
the executable's stack.  The problem is that the executable and the loader can
both specify the stack size for NOMMU, but which one do we pick, or do we
consider both.

David
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