linux-kernel - Re: [PATCH tracing/kprobes v2 1/5] tracing/kprobes: Rename special variables syntax

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Date:	Mon, 05 Oct 2009 17:34:24 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
CC:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	lkml <linux-kernel@...r.kernel.org>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Christoph Hellwig <hch@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	"Frank Ch. Eigler" <fche@...hat.com>
Subject: Re: [PATCH tracing/kprobes v2 1/5] tracing/kprobes: Rename special
 variables syntax

Frederic Weisbecker wrote:
> On Mon, Oct 05, 2009 at 05:11:05PM -0400, Masami Hiramatsu wrote:
>> Frederic Weisbecker wrote:
>>> Hmm, the problem is that %1, %2, etc. is not very self-explainable.
>>>
>>> May be %arg1, %arg2, etc.. But would that sound confusing since we
>>> have % for registers?
>>
>> As I sent right now, how about %argumentN ? it will not conflict with
>> register names...
>>
>
> There are archs that have %arg0 %arg1, ... as register names?
>
> Well, arg(n) looks shorter but I won't personnally mind if
> we eventually chose %argumentN. It's also clear, self-explainable
> and it won't collide.

Hmm, one idea hits me, how about this? :)
- %register
- %%spvars (%%retval, %%arg0)

Thank you,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

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