From: Christoph Hellwig <hch@lst.de>
To: Christoph Hellwig <hch@infradead.org>,
Roland McGrath <roland@redhat.com>,
Christoph Hellwig <hch@lst.de>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: utrace comments
Date: Mon, 30 Apr 2007 11:22:00 +0200 [thread overview]
Message-ID: <20070430092200.GA15773@lst.de> (raw)
In-Reply-To: <20070430091808.GA11345@flint.arm.linux.org.uk>
On Mon, Apr 30, 2007 at 10:18:09AM +0100, Russell King wrote:
> Roland's idea of single-stepping is that it *must* be supported by
> hardware for utrace to use it. There are a number of architectures
> which can only do single-stepping by modifying the text of the
> program being single stepped. ARM is one such example.
>
> As such, even when utrace is complete, some architectures will never
> support in-kernel single step with utrace. I believe Roland's idea
> is to have single step supported on these via some vapourware userspace
> library.
Does the current arm ptrace code support single stepping in kernelspace?
If yes we absolutely need to continue to support it.
> I'd also like to see utrace become *optional*
> for architectures to support, rather than as it currently stands as
> a *mandatory* requirement when merged.
No way we'd keep both the old ptrace mess and utrace in the same tree.
next prev parent reply other threads:[~2007-04-30 9:22 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-27 16:51 utrace comments Christoph Hellwig
2006-12-05 9:51 ` Roland McGrath
2006-12-06 21:58 ` Christoph Hellwig
2007-04-30 4:02 ` Roland McGrath
2007-04-30 9:08 ` Christoph Hellwig
2007-04-30 9:18 ` Russell King
2007-04-30 9:22 ` Christoph Hellwig [this message]
2007-04-30 9:33 ` Russell King
2007-04-30 9:45 ` Russell King
2007-04-30 10:32 ` Christoph Hellwig
2007-04-30 10:18 ` Christoph Hellwig
2007-06-22 2:40 ` Roland McGrath
2007-05-10 8:49 ` Roland McGrath
2007-04-30 9:11 ` condingstyle, was " Christoph Hellwig
2007-04-30 17:09 ` Andrew Morton
2007-04-30 18:19 ` Jan Engelhardt
2007-04-30 18:39 ` Daniel Hazelton
2007-04-30 18:42 ` Satyam Sharma
2007-04-30 22:18 ` Stefan Richter
2007-05-01 9:00 ` Geert Uytterhoeven
2007-05-01 13:11 ` Scott Preece
2007-05-01 14:16 ` David Woodhouse
2007-05-01 15:00 ` John Anthony Kazos Jr.
2007-05-01 16:07 ` David Howells
2007-05-02 2:18 ` Eric W. Biederman
2007-05-02 9:32 ` David Howells
2007-05-02 11:55 ` Eric W. Biederman
2007-05-02 12:05 ` David Howells
2007-05-01 20:12 ` Satyam Sharma
2007-05-01 15:05 ` Randy Dunlap
2007-05-01 15:06 ` David Woodhouse
2007-05-01 20:44 ` Satyam Sharma
2007-05-01 15:07 ` Geert Uytterhoeven
2007-05-01 15:11 ` David Woodhouse
2007-05-01 16:15 ` Stuart MacDonald
2007-04-30 21:34 ` Luck, Tony
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