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[Bug uprobes/6879] does not currently support probing instruction first byte 0x65
- From: "jkenisto at us dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 11 Sep 2008 23:23:29 -0000
- Subject: [Bug uprobes/6879] does not currently support probing instruction first byte 0x65
- References: <20080911211902.6879.fche@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From jkenisto at us dot ibm dot com 2008-09-11 23:23 -------
Created an attachment (id=2944)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=2944&action=view)
Enable probing of instructions with the 0x65 (gs:) prefix
Here's a patch that changes i386, x86_64, and x86 uprobes so that they don't
reject probes on instructions with the 0x65 prefix. I haven't tested it.
Frank, could you give it a try?
I scanned a disassembly of libc on my i686 system and verified that none of the
other segment prefixes are used, but I haven't done an exhaustive search for
all possible opcodes.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6879
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