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[Bug kprobes/2152] jprobe variant to run handler instead of probed function
- From: "anil dot s dot keshavamurthy at intel dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 16 Jan 2006 17:26:29 -0000
- Subject: [Bug kprobes/2152] jprobe variant to run handler instead of probed function
- References: <20060113232600.2152.jkenisto@us.ibm.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From anil dot s dot keshavamurthy at intel dot com 2006-01-16 17:26 -------
> Probably just calling "return" instead of "jprobe_return" from the jprobe
> handler would do the trick ?
You can't do that(at least in the current design) as jprobe_handler are
executed with preempt disabled and current_kprobe set to this probe. Hence
jprobe_handler() _must_ execute jprobe_return(), so that Kprobe code can
reverse the preempt count and clear current_kprobe.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2152
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