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[Bug kprobes/4384] New: Problem in making kprobe modules portable across all the archtecture.
- From: "srinivasa at in dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 17 Apr 2007 12:26:51 -0000
- Subject: [Bug kprobes/4384] New: Problem in making kprobe modules portable across all the archtecture.
- Reply-to: sourceware-bugzilla at sourceware dot org
When data symbols are not present in kernel image, one has to add dot(".")
before function name, that he wants to probe in kprobe module on ppc64.
Hence kernel module may not become portable across all the architecture.
When data symbols are missing on ppc64,
====================
[root@llm27lp1 ~]# cat /proc/kallsyms | grep do_fork
c00000000006283c T .do_fork
==============================
kp.symbol_name = ".do_fork";
============================
But if data symbols were included, then it looks like this
================
llm27lp2:~ # cat /proc/kallsyms |grep do_fork
c00000000005de28 T .do_fork
c0000000005fbe88 D do_fork
======================
kp.symbol_name = ".do_fork";
===============================
Iam attaching patch here, which solves this problem. Please let me know your
comments on this.
Thanks
Srinivasa DS
--
Summary: Problem in making kprobe modules portable across all the
archtecture.
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: kprobes
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: srinivasa at in dot ibm dot com
CC: ananth at in dot ibm dot com,anil dot s dot
keshavamurthy at intel dot com,jkenisto at us dot ibm
dot com,prasanna at in dot ibm dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=4384
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