lkml.org 
[lkml]   [2007]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Kwatch: kernel watchpoints using CPU debug registers
On Wed, Feb 21, 2007 at 03:35:13PM -0500, Alan Stern wrote:
> Going back to something you mentioned earlier...
>
[...]
> On Fri, 9 Feb 2007, Roland McGrath wrote:
> There are two things I am uncertain about: vm86 mode and kprobes. I don't
> know anything about how either of them works. Judging from the current
> code, nothing much should be needed -- debug traps in vm86 mode are
> handled by calling handle_vm86_trap(), and kprobes puts itself at the
> start of the notify_die() chain so it can handle single-step traps.
> Eventually it will be necessary to check with someone who really
> understands the issues.

Yes, Kprobes needs to get notified first to handle single-step traps. So kwatch
getting notified secound should be fine.

Thanks
Prasanna
--
Prasanna S.P.
Linux Technology Center
India Software Labs, IBM Bangalore
Email: prasanna@in.ibm.com
Ph: 91-80-41776329
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-02-22 12:45    [W:0.181 / U:0.244 seconds]
©2003-2011 Jasper Spaans. Advertise on this site