From: Segher Boessenkool <segher@kernel.crashing.org>
To: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
Cc: Steve Munroe <sjmunroe@us.ibm.com>,
linuxppc-dev list <linuxppc-dev@ozlabs.org>,
Paul Mackerras <paulus@samba.org>,
Anton Blanchard <anton@samba.org>
Subject: Re: Saving to 32 bits of GPRs in signal context
Date: Tue, 29 May 2007 16:31:57 +0200 [thread overview]
Message-ID: <fa5963726f06ede0d02002123d22fe2b@kernel.crashing.org> (raw)
In-Reply-To: <OF462E078D.FFB634FD-ON422572EA.004D1E28-422572EA.004DB265@de.ibm.com>
> > We don't need another ABI change to powerpc32 (still recovering=20
> from the
> > -msecure-plt ABI change) and WE DONT NEED a 3rd ABI.
> >
> > ABI changes ripple everywhere (not just GCC/GLIBC) including all=20
> debuggers
> > and performance tools. Believe me you really don't want this.
>
> Fully agreed. =A0This may have gotten lost in the discussion thread, =
but=20
> what
> Ben originally proposed was *not* an ABI change, for exactly that=20
> reason.
> We simply want to allow strictly local use of 64-bit registers for
> performance optimization purposes, while still fully complying with
> the 32-bit ABI.
Some stuff gets added to the user version of the signal
frame; is that not an ABI change? Quite possibly a
(supposedly) compatible change, but a change anyway.
Segher
next prev parent reply other threads:[~2007-05-29 14:32 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-29 7:24 Saving to 32 bits of GPRs in signal context Benjamin Herrenschmidt
2007-05-29 7:52 ` Dan Malek
2007-05-29 8:05 ` Benjamin Herrenschmidt
2007-05-29 9:26 ` Gabriel Paubert
2007-05-29 9:44 ` Benjamin Herrenschmidt
2007-05-29 13:12 ` Segher Boessenkool
2007-05-29 14:00 ` Steve Munroe
2007-05-29 14:08 ` Ulrich Weigand
2007-05-29 14:17 ` Kumar Gala
2007-05-29 14:38 ` Segher Boessenkool
2007-05-29 19:04 ` Becky Bruce
2007-05-30 10:04 ` Christoph Hellwig
2007-05-30 12:13 ` Kumar Gala
2007-05-30 12:30 ` Segher Boessenkool
2007-05-29 14:31 ` Segher Boessenkool [this message]
2007-05-29 14:51 ` Steve Munroe
2007-05-29 21:44 ` Benjamin Herrenschmidt
2007-05-29 23:16 ` Steve Munroe
2007-05-29 23:19 ` Benjamin Herrenschmidt
2007-05-30 7:34 ` Hiroyuki Machida
2007-05-30 11:40 ` Segher Boessenkool
2007-05-30 11:48 ` Benjamin Herrenschmidt
2007-05-30 3:37 ` Paul Mackerras
2007-05-30 5:32 ` Kumar Gala
2007-05-30 11:44 ` Benjamin Herrenschmidt
2007-05-30 12:15 ` Kumar Gala
2007-05-30 12:48 ` Hiroyuki Machida
2007-05-30 12:58 ` Benjamin Herrenschmidt
2007-05-30 18:09 ` Steve Munroe
2007-05-30 21:02 ` Gabriel Paubert
2007-05-30 21:41 ` Steve Munroe
2007-05-30 12:01 ` Segher Boessenkool
2007-05-30 11:59 ` Segher Boessenkool
2007-05-30 12:01 ` Benjamin Herrenschmidt
2007-05-30 12:07 ` Segher Boessenkool
2007-05-30 12:09 ` Benjamin Herrenschmidt
2007-05-30 12:36 ` Segher Boessenkool
2007-05-29 14:28 ` Segher Boessenkool
2007-05-29 21:37 ` Benjamin Herrenschmidt
2007-05-29 21:38 ` Benjamin Herrenschmidt
2007-05-29 13:04 ` Segher Boessenkool
2007-05-29 14:28 ` Arnd Bergmann
2007-05-29 14:43 ` Segher Boessenkool
2007-05-29 15:54 ` Geert Uytterhoeven
2007-05-29 18:48 ` Arnd Bergmann
2007-05-29 21:27 ` Benjamin Herrenschmidt
2007-05-29 21:45 ` Felix Domke
2007-05-30 11:23 ` Benjamin Herrenschmidt
2007-05-30 11:52 ` Felix Domke
2007-05-30 13:14 ` Segher Boessenkool
2007-05-30 11:54 ` Segher Boessenkool
2007-05-30 12:07 ` Felix Domke
2007-05-31 5:39 ` Benjamin Herrenschmidt
2007-05-29 13:10 ` Kumar Gala
2007-05-29 21:32 ` Benjamin Herrenschmidt
2007-05-29 23:46 ` Olof Johansson
2007-05-30 0:43 ` Kumar Gala
2007-05-30 2:54 ` Steve Munroe
2007-05-30 5:31 ` Kumar Gala
2007-05-30 19:47 ` Steve Munroe
2007-05-30 20:52 ` Olof Johansson
2007-05-30 21:33 ` Steve Munroe
2007-05-29 13:53 ` Ulrich Weigand
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