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From: Andi Kleen <andi@firstfloor.org>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: jdike@addtoit.com, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org,
	user-mode-linux-devel@lists.sourceforge.net
Subject: Re: uml and -regparm=3
Date: Wed, 09 Jan 2008 22:12:43 +0100	[thread overview]
Message-ID: <p734pdmput0.fsf@bingen.suse.de> (raw)
In-Reply-To: <E1JCi3M-0006hO-7i@pomaz-ex.szeredi.hu> (Miklos Szeredi's message of "Wed\, 09 Jan 2008 22\:01\:36 +0100")

Miklos Szeredi <miklos@szeredi.hu> writes:

> FASTCALL is defined empty in -mm, but UML is not compiled with
> -mregparm=3 and so this breaks things (I noticed problems with
> rwsem_down_write_failed).
>
> Tried recompiling UML with -mregparm=3, but that resulted in a strange
> failure immediately after startup:
>
> |%G�%@: Invalid argument
>
> What's up?

UML links with glibc and that does not use -mregparm. 

You can only use -mregparm in user space if you recompile
all libraries too.

-Andi

  reply	other threads:[~2008-01-09 21:12 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-09 21:01 uml and -regparm=3 Miklos Szeredi
2008-01-09 21:12 ` Andi Kleen [this message]
2008-01-09 21:20   ` Miklos Szeredi
2008-01-09 21:32     ` Andi Kleen
2008-01-09 21:50       ` Miklos Szeredi
2008-01-10  2:14         ` Jeff Dike
2008-01-10  2:37           ` Andi Kleen
2008-01-10  2:45             ` H. Peter Anvin
2008-01-09 21:33     ` Adrian Bunk
2008-01-09 22:01 ` linux-os (Dick Johnson)
2008-01-10  7:32 ` Ingo Molnar
2008-01-10  9:05   ` Miklos Szeredi
2008-01-10  9:35     ` Ingo Molnar

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