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Re: [PATCH] Save and restore SSE registers in _dl_runtime_resolve.

From: Petr Baudis <pasky at suse dot cz>
To: Richard Henderson <rth at twiddle dot net>
Cc: Joe Damato <ice799 at gmail dot com>, libc-alpha at sourceware dot org
Date: Tue, 11 May 2010 22:36:34 +0200
Subject: Re: [PATCH] Save and restore SSE registers in _dl_runtime_resolve.
References: <1273595172-25494-1-git-send-email-ice799@gmail.com><4BE992A1.7030509@twiddle.net>

On Tue, May 11, 2010 at 10:23:45AM -0700, Richard Henderson wrote:
> On 05/11/2010 09:26 AM, Joe Damato wrote:
> > Hi,
> > 
> > It seems that _dl_runtime_resolve should be saving and restoring the
> > SSE registers to comply with the amd64 ABI, unless I am reading it
> > incorrectly (and I very well could be).
> 
> We only need to do that if the dynamic linker clobbers
> those registers, and it should not.

Can we be sure, with modern gcc and auto-parallelization? Or are we
taking some countermeasures against this that I'm not seeing?

				Petr "Pasky" Baudis

Follow-Ups:
- Re: [PATCH] Save and restore SSE registers in _dl_runtime_resolve.
  - From: Jakub Jelinek

References:
- [PATCH] Save and restore SSE registers in _dl_runtime_resolve.
  - From: Joe Damato
- Re: [PATCH] Save and restore SSE registers in _dl_runtime_resolve.
  - From: Richard Henderson

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