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[Bug kprobes/2945] cannot probe vgettimeofday on x86_64
- From: "jkenisto at us dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 16 Nov 2006 18:07:34 -0000
- Subject: [Bug kprobes/2945] cannot probe vgettimeofday on x86_64
- References: <20060720182952.2945.hunt@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From jkenisto at us dot ibm dot com 2006-11-16 18:07 -------
Further thoughts:
- vdso, not vtoc. (Haste and advanced age are a bad combo. :-})
- Since a kprobed instruction is copied into a kernel-space buffer and
single-stepped there, we do NOT want to allow kprobes on instructions that are
executed in user mode, such as on the vdso page.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2945
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