linux-kernel - Re: [PATCH v8 7/7] kprobes: Add arm64 case in kprobe example module

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Date:	Wed, 12 Aug 2015 17:22:18 +0100
From:	Steve Capper <steve.capper@...aro.org>
To:	David Long <dave.long@...aro.org>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	Sandeepa Prabhu <sandeepa.s.prabhu@...il.com>,
	William Cohen <wcohen@...hat.com>,
	"Jon Medhurst (Tixy)" <tixy@...aro.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	David Miller <davem@...emloft.net>,
	Mark Brown <broonie@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 7/7] kprobes: Add arm64 case in kprobe example module

On 11 August 2015 at 01:52, David Long <dave.long@...aro.org> wrote:
> From: Sandeepa Prabhu <sandeepa.s.prabhu@...il.com>
>
> Add info prints in sample kprobe handlers for ARM64
>
> Signed-off-by: Sandeepa Prabhu <sandeepa.s.prabhu@...il.com>
> ---
>  samples/kprobes/kprobe_example.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

I'm not going through this series backwards, but I did run the kprobe
sample modules first, and nothing happened... (i.e. nothing fired).

The kernel usage of do_fork (which is used as an example by the sample
code) has been changed by:
3033f14a clone: support passing tls argument via C rather than pt_regs magic

Now everything appears to go through _do_fork rather than do_fork.

I'll send a fixup shortly, but if anyone else is running these modules
and worrying about a lack of events... worry less :-).

Cheers,
--
Steve
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