linux-kernel - Re: [PATCH] Linux Kernel Markers

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Message-ID: <45101DBA.7000901@google.com>
Date:	Tue, 19 Sep 2006 09:41:30 -0700
From:	Martin Bligh <mbligh@...gle.com>
To:	Andrew Morton <akpm@...l.org>
CC:	"Frank Ch. Eigler" <fche@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Paul Mundt <lethal@...ux-sh.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Jes Sorensen <jes@....com>, Tom Zanussi <zanussi@...ibm.com>,
	Richard J Moore <richardj_moore@...ibm.com>,
	Michel Dagenais <michel.dagenais@...ymtl.ca>,
	Christoph Hellwig <hch@...radead.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	William Cohen <wcohen@...hat.com>, ltt-dev@...fik.org,
	systemtap@...rces.redhat.com, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] Linux Kernel Markers

Andrew Morton wrote:
> On Tue, 19 Sep 2006 09:04:43 -0700
> Martin Bligh <mbligh@...gle.com> wrote:
> 
> 
>>It seems like all we'd need to do
>>is "list all references to function, freeze kernel, update all
>>references, continue"
> 
> 
> "overwrite first 5 bytes of old function with `jmp new_function'".

Yes, that's simple. but slower, as you have a double jump. Probably
a damned sight faster than int3 though.

M.
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