From: Roland McGrath <roland@redhat.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>,
Kernel development list <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] hwbkpt: Hardware breakpoints (was Kwatch)
Date: Tue, 6 Mar 2007 19:49:31 -0800 (PST) [thread overview]
Message-ID: <20070307034932.09F5A1801C4@magilla.sf.frob.com> (raw)
In-Reply-To: Alan Stern's message of Tuesday, 6 March 2007 10:23:53 -0500 <Pine.LNX.4.44L0.0703061015100.3401-100000@iolanthe.rowland.org>
> > Yeah, I guess that's right. It should still return NOTIFY_STOP when
> > args->err has no other bits set, so notifiers aren't called with zero.
>
> In practice that might not work. On my machine, at least, reads of DR6
> return ones in all the reserved bit positions.
Does that mean asm("mov %1,%%dr6; mov %%dr6,%0" : "=r" (mask) : "r" (0));
puts in mask the set of reserved bits? We could collect that value at CPU
startup and mask it off args->err, then OR it back into vdr6.
Thanks,
Roland
next prev parent reply other threads:[~2007-03-07 3:49 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070207025008.1B11118005D@magilla.sf.frob.com>
2007-02-07 19:22 ` [PATCH] Kwatch: kernel watchpoints using CPU debug registers Alan Stern
2007-02-07 22:08 ` Bob Copeland
2007-02-09 10:21 ` Roland McGrath
2007-02-09 15:54 ` Alan Stern
2007-02-09 23:31 ` Roland McGrath
2007-02-10 4:32 ` Alan Stern
2007-02-18 3:03 ` Roland McGrath
2007-02-21 20:35 ` Alan Stern
2007-02-22 11:43 ` S. P. Prasanna
2007-02-23 2:19 ` Roland McGrath
2007-02-23 16:55 ` Alan Stern
2007-02-24 0:08 ` Roland McGrath
2007-03-02 17:19 ` [RFC] hwbkpt: Hardware breakpoints (was Kwatch) Alan Stern
2007-03-05 7:01 ` Roland McGrath
2007-03-05 13:36 ` Christoph Hellwig
2007-03-05 16:16 ` Alan Stern
2007-03-05 16:49 ` Christoph Hellwig
2007-03-05 22:04 ` Roland McGrath
2007-03-05 17:25 ` Alan Stern
2007-03-06 3:13 ` Roland McGrath
2007-03-06 15:23 ` Alan Stern
2007-03-07 3:49 ` Roland McGrath [this message]
2007-03-07 19:11 ` Alan Stern
2007-03-09 6:52 ` Roland McGrath
2007-03-09 18:40 ` Alan Stern
2007-03-13 8:00 ` Roland McGrath
2007-03-13 13:07 ` Alan Cox
2007-03-13 18:56 ` Alan Stern
2007-03-14 3:00 ` Roland McGrath
2007-03-14 19:11 ` Alan Stern
2007-03-28 21:39 ` Roland McGrath
2007-03-29 21:35 ` Alan Stern
2007-04-13 21:09 ` Alan Stern
2007-05-11 15:25 ` Alan Stern
2007-05-13 10:39 ` Roland McGrath
2007-05-14 15:42 ` Alan Stern
2007-05-14 21:25 ` Roland McGrath
2007-05-16 19:03 ` Alan Stern
2007-05-23 8:47 ` Roland McGrath
2007-06-01 19:39 ` Alan Stern
2007-06-14 6:48 ` Roland McGrath
2007-06-19 20:35 ` Alan Stern
2007-06-25 10:52 ` Roland McGrath
2007-06-25 15:36 ` Alan Stern
2007-06-26 20:49 ` Roland McGrath
2007-06-27 3:26 ` Alan Stern
2007-06-27 21:04 ` Roland McGrath
2007-06-29 3:00 ` Alan Stern
2007-07-11 6:59 ` Roland McGrath
2007-06-28 3:02 ` Roland McGrath
2007-06-25 11:32 ` Roland McGrath
2007-06-25 15:37 ` Alan Stern
2007-06-25 20:51 ` Alan Stern
2007-06-26 18:17 ` Roland McGrath
2007-06-27 2:43 ` Alan Stern
2007-05-17 20:39 ` Alan Stern
2007-03-16 21:07 ` Alan Stern
2007-03-22 19:44 ` Alan Stern
[not found] <20070628023100.E46AB4D05E6@magilla.localdomain>
2007-06-29 3:36 ` Alan Stern
2007-07-06 20:48 ` Alan Stern
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