From: Daniel Jacobowitz <drow@false.org>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: fnf@specifix.com, gdb-patches@sources.redhat.com
Subject: Re: [PATCH] Fix PPC scan_prologue for code generated with -mno-update
Date: Fri, 16 Feb 2007 12:00:00 -0000 [thread overview]
Message-ID: <20070216120024.GA29018@caradoc.them.org> (raw)
In-Reply-To: <200702160822.l1G8MYL8026770@brahms.sibelius.xs4all.nl>
On Fri, Feb 16, 2007 at 09:22:34AM +0100, Mark Kettenis wrote:
> Looks reasonable to me. However there's one thing I don't understand.
> Presuming you're using DWARF2 debug info, why does improving the
> prologue scanner make such a big difference?
Because we still haven't hooked up the DWARF2 unwinder for PowerPC;
I believe this is because of the (now long-ago fixed) botch on CFI
register numbering for lr. The last message I recall is:
http://sourceware.org/ml/gdb-patches/2006-05/msg00341.html
I think all that we need is a way to check the recorded LR column
and adjust register numbering based on that.
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2007-02-16 12:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200702151807.06227.fnf@specifix.com>
2007-02-16 8:22 ` Mark Kettenis
2007-02-16 12:00 ` Daniel Jacobowitz [this message]
2007-02-16 14:01 ` Fred Fish
2007-02-16 16:47 ` Fred Fish
2007-02-27 17:11 ` Daniel Jacobowitz
2007-02-27 17:31 ` Fred Fish
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