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Date:      Wed, 22 Nov 2000 07:47:03 +0000 (GMT)
From:      Doug Rabson <dfr@nlsystems.com>
To:        John Baldwin <jhb@freebsd.org>
Cc:        Daniel Eischen <eischen@vigrid.com>, Jonathan Lemon <jlemon@flugsvamp.com>, arch@freebsd.org
Subject:   Re: Thread-specific data and KSEs
Message-ID:  <Pine.BSF.4.21.0011220745130.247-100000@salmon.nlsystems.com>
In-Reply-To: <XFMail.001121171923.jhb@FreeBSD.org>

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On Tue, 21 Nov 2000, John Baldwin wrote:

> Well, %gs would cover x86 and k64.  I think ia64 has several application
> registers that are available for OS use and we could steal one of those.  I'm
> not sure about the alpha though.

On ia64, we already use r13 (defined by the ABI as the 'thread
pointer') to point at per-cpu locals. In user-mode, r13 should also be
reserved.

-- 
Doug Rabson				Mail:  dfr@nlsystems.com
					Phone: +44 20 8348 6160




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