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Re: Hitachi djprobe mechanism
- From: Masami Hiramatsu <hiramatu at sdl dot hitachi dot co dot jp>
- To: Roland McGrath <roland at redhat dot com>
- Cc: Richard J Moore <richardj_moore at uk dot ibm dot com>, SystemTAP <systemtap at sources dot redhat dot com>, sugita at sdl dot hitachi dot co dot jp, Satoshi Oshima <soshima at redhat dot com>
- Date: Tue, 26 Jul 2005 16:08:14 +0900
- Subject: Re: Hitachi djprobe mechanism
- References: <20050721225156.EDBB9180A00@magilla.sf.frob.com>
Hi, Roland
Roland McGrath wrote:
They posted here, and the basic techniques are the same as the published
"kerninst" work.
I think Kerninst is similar in effect to djprobe. both of them copy
original code to a buffer and jump to the buffer.
However I think that the most unique feature of djprobe is use of
"bypass" route to safely insert code on SMP.
I cannot find SMP safety mechanism like "bypass" in kerninst papers
yet.
Please let me know if you knew it.
best regards,
--
Masami HIRAMATSU
2nd Research Dept.
Hitachi, Ltd., Systems Development Laboratory
E-mail: hiramatu@sdl.hitachi.co.jp