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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

  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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