From: Erwin Rol <mailinglists@erwinrol.com>
To: ptxdist@pengutronix.de
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Subject: Re: [ptxdist] 64bit kernel 32bit userspace
Date: Wed, 24 Jul 2013 12:37:33 +0200 [thread overview]
Message-ID: <51EFAE6D.9030202@erwinrol.com> (raw)
In-Reply-To: <20130724095707.GF1754@pengutronix.de>
Hey Uwe,
On 24-7-2013 11:57, Uwe Kleine-König wrote:
> Hi Erwin,
>
> On Wed, Jul 24, 2013 at 11:31:40AM +0200, Erwin Rol wrote:
>> is it possible to setup ptxdist to compile a 64bit kernel and 32bit
>> userspace. I didn't find a way to select two different compilers, one
>> for the kernel and one for the userspace programms.
> I would expect that the kernel does the right thing with a toolchain
> that defaults to 32bit. (i.e. passing -m64)
Does that really work, for a i686-X compiler? I thought that only worked
the other way around, a x86_64-X compiler with -m32 ?
> I wonder why you want such a mixed setup?!
To let kernel use the extra registers and MMU features of the X86_64
mode, but not to worry about userspace programs that aren't 64bit clean.
- Erwin
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prev parent reply other threads:[~2013-07-24 10:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-24 9:31 Erwin Rol
2013-07-24 9:57 ` Uwe Kleine-König
2013-07-24 10:32 ` Jürgen Beisert
2013-07-24 10:37 ` Erwin Rol [this message]
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