linux-kernel - Re: [PATCH 15/17] tracing/uprobes: Add support for full argument access methods

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Message-ID: <20140102160218.6e9ee4a4@gandalf.local.home>
Date:	Thu, 2 Jan 2014 16:02:18 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Hyeoncheol Lee <cheol.lee@....com>,
	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Hemant Kumar <hkshaw@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 15/17] tracing/uprobes: Add support for full argument
 access methods

On Thu, 2 Jan 2014 15:58:27 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Mon, 16 Dec 2013 13:32:14 +0900
> Namhyung Kim <namhyung@...nel.org> wrote:
> 
> > From: Namhyung Kim <namhyung.kim@....com>
> > 
> > Enable to fetch other types of argument for the uprobes.  IOW, we can
> > access stack, memory, deref, bitfield and retval from uprobes now.
> > 
> > The format for the argument types are same as kprobes (but @SYMBOL
> > type is not supported for uprobes), i.e:
> > 
> >   @ADDR   : Fetch memory at ADDR
> >   $stackN : Fetch Nth entry of stack (N >= 0)
> >   $stack  : Fetch stack address
> >   $retval : Fetch return value
> >   +|-offs(FETCHARG) : Fetch memory at FETCHARG +|- offs address
> > 
> > Note that the retval only can be used with uretprobes.
> > 
> > Original-patch-by: Hyeoncheol Lee <cheol.lee@....com>
> 
> Where was the original patch posted? And can we get Hyeoncheol's SOB for
> this?
> 

Was this the other part of patch 11? Still should have Hyeoncheol's
signed-off-by. If you already had it on the original (before the split)
then we can add it here too, as he already signed off on the code that
this was based on.

-- Steve
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