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From: Will Deacon <will.deacon@arm.com>
To: "Wang, Yalin" <Yalin.Wang@sonymobile.com>
Cc: "'linux-mmc@vger.kernel.org'" <linux-mmc@vger.kernel.org>,
	"'linux-arch-owner@vger.kernel.org'"
	<linux-arch-owner@vger.kernel.org>
Subject: Re: how to creat watchpoint  in kernel for data access debug
Date: Wed, 4 Jun 2014 19:01:39 +0100	[thread overview]
Message-ID: <20140604180139.GD27881@arm.com> (raw)
In-Reply-To: <35FD53F367049845BC99AC72306C23D1029A27656A2F@CNBJMBX05.corpusers.net>

On Wed, Jun 04, 2014 at 04:05:03AM +0100, Wang, Yalin wrote:
> Hi  Will,
> 
> Thanks for your proposal,
> The patch google made is just like
> The one I tried before ,
> Then the problems come :
> After register the perf_event callback,
> In the callback function ,
> In google's patch , it is  function crbug_345917_handler( ),
> It just call panic( ) ,
> But My callback function will do some check ,
> Sometimes, I want to bypass this time's breakpoint,
> Problems is that I don't know how to bypass it,
> If I return directly in the callback function ,
> The breakpoint will trap again and again endless ..

Take a look at enable_single_step, which uses mismatch breakpoints to try
and do the step.

Will

  reply	other threads:[~2014-06-04 18:01 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-23  2:50 (unknown), Wang, Yalin
2014-05-23  2:51 ` how to creat watchpoint in kernel for data access debug Wang, Yalin
2014-05-23 13:45   ` Will Deacon
2014-05-24  3:48     ` Wang, Yalin
2014-06-03 16:45       ` Will Deacon
2014-06-04  3:05         ` Wang, Yalin
2014-06-04 18:01           ` Will Deacon [this message]
2014-06-05  3:40             ` Wang, Yalin
2014-06-16 12:55               ` Will Deacon

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