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Date: Thu, 21 Mar 2013 17:00:02 +0100
From: Oleg Nesterov <oleg@redhat.com>
To: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Subject: Re: [PATCH] powerpc/uprobes: teach uprobes to ignore gdb breakpoints
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Cc: ppcdev <linuxppc-dev@lists.ozlabs.org>,
 Srikar Dronamraju <srikar@linux.vnet.ibm.com>, stable@vger.kernel.org
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On 03/21, Ananth N Mavinakayanahalli wrote:
?
> On Wed, Mar 20, 2013 at 05:07:28PM +0100, Oleg Nesterov wrote:
> > On 03/20, Ananth N Mavinakayanahalli wrote:
> > >
> > > On Wed, Mar 20, 2013 at 01:43:01PM +0100, Oleg Nesterov wrote:
> > > > On 03/20, Oleg Nesterov wrote:
> > > > >
> > > > IOW, if I wasn't clear... Lets forget about gdb/etc for the moment.
> > > > Suppose we apply the patch below. Will uprobes on powerpc work?
> > > >
> > > > If yes, then your patch should be fine. If not, we probably need more
> > > > changes.
> > >
> > > Yes, it will work fine.
> >
> > Even if this new insn is conditional?
>
> Yes.

But this can't be true. If it is conditional, it won't always generate a
trap, this means uprobe won't actually work.

Oleg.