linux-kernel - Re: missing kretprobes support on avr32 and sparc64

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Message-ID: <51006.172.21.0.12.1175420843.squirrel@pat.norway.atmel.com>
Date:	Sun, 1 Apr 2007 11:47:23 +0200 (CEST)
From:	Håvard Skinnemoen <hskinnemoen@...el.com>
To:	"Christoph Hellwig" <hch@....de>
Cc:	hskinnemoen@...el.com, davem@...emloft.net,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: missing kretprobes support on avr32 and sparc64

On Sat, March 31, 2007 15:15, Christoph Hellwig wrote:
> Currently all avr32 and sparc64 don't support kretprobes unlike all
> other kprobes supporting architectures.  This is not nice from the
> user interface point of view and from the ugly ifdefs point of view.
> Is there a reason these ports can't support kretprobes or was this
> simply an oversight / lazyness?

Lazyness on my part, I guess. It shouldn't be too hard to implement on
avr32; It looks like the generic code sets a breakpoint on function entry,
so all I have to do is to set a breakpoint on the return address. And
handle the breakpoint somehow. I'll try to implement it when I get back to
work in about a week.

Haavard

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