From: Daniel Jacobowitz <dan@debian.org>
To: "H . J . Lu" <hjl@lucon.org>
Cc: Ulrich Drepper <drepper@redhat.com>,
GNU libc hacker <libc-hacker@sources.redhat.com>,
linux-mips@oss.sgi.com
Subject: Re: thread-ready ABIs
Date: Fri, 18 Jan 2002 16:23:25 -0500 [thread overview]
Message-ID: <20020118162325.A19122@nevyn.them.org> (raw)
In-Reply-To: <20020118101908.C23887@lucon.org>
On Fri, Jan 18, 2002 at 10:19:08AM -0800, H . J . Lu wrote:
> > MIPS: Who feels responsible? Andreas, HJ?
> >
>
> I don't see there are any registers we can use without breaking ABI.
> On the other hand, can we change the mips kernel to save k0 or k1 for
> user space?
No, there are no free registers and $k0/$k1 are needed by the kernel
for exceptions. The only way I can see to do this would be to change
the ABI.
There are none available; the least used that I see is $v1, but $v1 is
used to return half of a double precision return value. We would have
to steal one of the existing call-saved or call-clobbered registers.
--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer
next prev parent reply other threads:[~2002-01-18 22:23 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <m3elkoa5dw.fsf@myware.mynet>
2002-01-18 18:19 ` thread-ready ABIs H . J . Lu
2002-01-18 18:31 ` Ulrich Drepper
2002-01-18 19:08 ` H . J . Lu
2002-01-18 19:20 ` Ulrich Drepper
2002-01-19 12:14 ` Dominic Sweetman
2002-01-19 12:14 ` Dominic Sweetman
2002-01-20 0:14 ` Ralf Baechle
2002-01-18 20:03 ` Maciej W. Rozycki
2002-01-18 20:20 ` Ulrich Drepper
2002-01-18 20:50 ` Maciej W. Rozycki
2002-01-18 21:02 ` Ulrich Drepper
2002-01-18 21:35 ` Maciej W. Rozycki
2002-01-18 21:44 ` Ulrich Drepper
2002-01-18 22:17 ` Maciej W. Rozycki
2002-01-18 21:23 ` Daniel Jacobowitz [this message]
2002-01-19 0:35 ` Kevin D. Kissell
2002-01-19 0:35 ` Kevin D. Kissell
2002-01-19 4:11 ` H . J . Lu
2002-01-19 12:27 ` Dominic Sweetman
2002-01-19 19:42 ` H . J . Lu
2002-01-21 13:27 ` Maciej W. Rozycki
2002-01-19 22:21 ` Kevin D. Kissell
2002-01-19 22:21 ` Kevin D. Kissell
2002-01-20 10:38 ` Machida Hiroyuki
2002-01-20 11:58 ` Kevin D. Kissell
2002-01-20 11:58 ` Kevin D. Kissell
2002-01-20 13:16 ` Machida Hiroyuki
2002-01-22 6:27 ` patches for test-and-set without ll/sc (Re: thread-ready ABIs) Machida Hiroyuki
2002-01-22 6:37 ` Ulrich Drepper
2002-01-22 6:46 ` Machida Hiroyuki
2002-01-22 6:56 ` Ulrich Drepper
2002-01-24 9:56 ` Andreas Jaeger
2002-01-24 9:56 ` Andreas Jaeger
2002-01-20 19:19 ` thread-ready ABIs H . J . Lu
2002-01-21 9:39 ` Kevin D. Kissell
2002-01-21 9:39 ` Kevin D. Kissell
2002-01-21 13:56 ` Maciej W. Rozycki
2002-01-21 18:24 ` H . J . Lu
2002-01-21 18:36 ` Ulrich Drepper
2002-01-21 18:52 ` H . J . Lu
2002-01-21 18:58 ` H . J . Lu
2002-01-21 18:59 ` Daniel Jacobowitz
2002-01-21 19:05 ` H . J . Lu
2002-01-21 19:09 ` Daniel Jacobowitz
2002-01-21 19:18 ` H . J . Lu
2002-01-21 21:04 ` Kevin D. Kissell
2002-01-21 21:04 ` Kevin D. Kissell
2002-01-21 19:30 ` Geoff Keating
2002-01-21 21:07 ` Ulrich Drepper
2002-01-21 13:43 ` Maciej W. Rozycki
2002-01-20 0:24 ` Ralf Baechle
2002-01-21 23:22 ` Ulrich Drepper
2002-01-21 23:57 ` Kevin D. Kissell
2002-01-21 23:57 ` Kevin D. Kissell
2002-01-22 0:16 ` Ulrich Drepper
2002-01-22 0:16 ` Ulrich Drepper
2002-01-22 9:37 ` Dominic Sweetman
2002-01-22 9:37 ` Dominic Sweetman
2002-01-22 17:41 ` Ulrich Drepper
2002-01-22 17:41 ` Ulrich Drepper
2002-01-22 9:59 ` Dominic Sweetman
2002-01-22 9:59 ` Dominic Sweetman
2002-01-22 12:18 ` Kevin D. Kissell
2002-01-22 12:18 ` Kevin D. Kissell
2002-01-22 15:21 ` Daniel Jacobowitz
2002-01-22 15:44 ` Dominic Sweetman
2002-01-22 21:44 ` Tommy S. Christensen
2002-01-22 21:53 ` Kevin D. Kissell
2002-01-22 21:53 ` Kevin D. Kissell
2002-01-22 23:13 ` Kevin D. Kissell
2002-01-22 23:13 ` Kevin D. Kissell
2002-01-23 1:12 ` Jason Gunthorpe
2002-01-22 16:05 ` Kevin D. Kissell
2002-01-22 16:05 ` Kevin D. Kissell
2002-01-22 16:34 ` Daniel Jacobowitz
2002-01-22 17:08 ` Kevin D. Kissell
2002-01-22 17:08 ` Kevin D. Kissell
2002-01-22 17:13 ` Daniel Jacobowitz
2002-01-22 17:34 ` Kevin D. Kissell
2002-01-22 17:34 ` Kevin D. Kissell
2002-01-22 17:37 ` Daniel Jacobowitz
2002-01-22 17:47 ` Kevin D. Kissell
2002-01-22 17:47 ` Kevin D. Kissell
2002-01-22 17:57 ` Daniel Jacobowitz
2002-01-22 18:18 ` Kevin D. Kissell
2002-01-22 18:18 ` Kevin D. Kissell
2002-01-27 20:24 ` Alan Cox
2002-01-27 20:24 ` Alan Cox
2002-01-28 8:50 ` Kevin D. Kissell
2002-01-28 8:50 ` Kevin D. Kissell
2002-01-22 1:39 ` Richard Henderson
2002-01-18 21:24 Justin Carlson
2002-01-18 21:31 ` Ulrich Drepper
2002-01-18 21:42 ` Maciej W. Rozycki
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