linux-kernel - Re: [PATCH] broken TASK_SIZE for ia32

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Message-ID: <20120507001327.GC22082@ZenIV.linux.org.uk>
Date:	Mon, 7 May 2012 01:13:27 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	David Miller <davem@...emloft.net>
Cc:	hpa@...or.com, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org, ralf@...ux-mips.org
Subject: Re: [PATCH] broken TASK_SIZE for ia32_aout

On Sun, May 06, 2012 at 07:38:14PM -0400, David Miller wrote:
> From: Al Viro <viro@...IV.linux.org.uk>
> Date: Mon, 7 May 2012 00:32:34 +0100
> 
> > bit looks dubious.  What happens when 32bit task makes a 64bit syscall?
> > Do we really want to drop upper 32 bits of all arguments in the copy we
> > are building?
> 
> I basically never intended to support 32-bit tasks making 64-bit
> system calls except in extremely limited situations such as ptrace()
> so that a 32-bit gdb could debug 64-bit tasks.
> 
> Do we really have to support crap like this?

Hey, I'm all for getting rid of that...
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