linux-kernel - Re: [PATCH] perf: Add DWARF register lookup for SH

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Message-ID: <20100712064126.GA3716@linux-sh.org>
Date:	Mon, 12 Jul 2010 15:41:26 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ian Munsie <imunsie@...ibm.com>,
	Masami Hiramatsu <mhiramat@...hat.com>
Subject: Re: [PATCH] perf: Add DWARF register lookup for SH

On Mon, Jul 12, 2010 at 07:23:44AM +0100, Matt Fleming wrote:
> On Mon, 12 Jul 2010 10:54:43 +0900, Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote:
> > Matt Fleming wrote:
> > > Implement get_arch_regstr() for SH so that, given a DWARF register
> > > number, the corresponding symbolic name of that register can be looked
> > > up.
> > 
> > OK, the patch itself looks good, but I don't know whether SH kernel
> > supports KPROBE_EVENT which is required for perf-probe. Or, SH kernel
> > repository already has it?
> 
> No, SH doesn't support KPROBE_EVENT yet. It's on my list of things to
> do. However, this patch also stops the "DWARF register mappings have not
> been defined" warning when building perf.

It does now, by virtue of HAVE_REGS_AND_STACK_ACCESS_API. The initial
support for this was checked in on June 14th, so you should be able to
use it already as long as you're working with current HEAD.
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