[Bug runtime/6646] SystemTap scripts fail with an Oops on x86

["ananth at in dot ibm dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From ananth at in dot ibm dot com  2008-06-19 03:07 -------
Re: comment #13, with --ignore-dwarf --ignore-vmlinux --kmap=/proc/kallsyms, the
script is able to resolve the probe address correctly, but it still crashes 'cos
of the incorrect modules_op address.

[ananth@jataayu ~]$ stap -vv -k --ignore-dwarf --ignore-vmlinux
--kmap=/proc/kallsyms current-parent.stp
...
Pass 1: parsed user script and 42 library script(s) in 600usr/10sys/628real ms.
probe sys_open@?:-1 kernel pc=0xc04678b0
Pass 2: analyzed script: 1 probe(s), 3 function(s), 1 embed(s), 0 global(s) in
90usr/70sys/1902real ms.
probe_1365 locks nothing
dwfl_module_getsym: name is modules_op, st_value is c11d1580

Re comment #14, I don't understand that. We don't see the problem with distro
shipped kernels: a printf in dwfl_module_getsym() shows st_value has the correct
(relocated?) address => runtime already gets the correct address from libdwfl;
in the failing case, this is the 'unrelocated' address shown above.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6646

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