From: Fred Fish <fnf@specifix.com>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: gdb-patches@sources.redhat.com
Subject: Re: [PATCH] Fix PPC scan_prologue for code generated with -mno-update
Date: Fri, 16 Feb 2007 14:01:00 -0000 [thread overview]
Message-ID: <200702160701.30925.fnf@specifix.com> (raw)
In-Reply-To: <200702160822.l1G8MYL8026770@brahms.sibelius.xs4all.nl>
On Friday 16 February 2007, 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?
Good question.
Originally the problem popped up in an environment where the user was
using stabs debugging format with a pretty ancient compiler.
I distilled the problem down to a simple test case and compiled it
without debugging info, after I figured out the problem was an issue
with the prologue scanner.
Perhaps this has uncovered another bug related to how the DWARF info
is used. It's certainly worth investigating.
However I believe the patch is still beneficial, for the cases where
the debug format is something other than DWARF or there is no debug
info.
-Fred
next prev parent reply other threads:[~2007-02-16 14:01 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
2007-02-16 14:01 ` Fred Fish [this message]
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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