Messages in this thread | | | Date | Sun, 29 Feb 2004 23:03:18 +0100 | From | Marc Giger <> | Subject | Re: kernel unaligned acc on Alpha |
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Hi Måns,
On Sun, 29 Feb 2004 22:24:45 +0100 mru@kth.se (Måns Rullgård) wrote:
> Marc Giger <gigerstyle@gmx.ch> writes: > > > Hi All, > > > > I have a lot of unaligned accesses in kernel space: > > > > kernel unaligned acc : 2191330 > > (pc=fffffffc002557d8,va=fffffffc00256059) > > > > It seems to be located in the networking part (iptables?) from the > > kernel. Can someone please help me how to find the location of these > > uac's? I already have recompiled the kernel with debugging enabled > > and tried to debug it with gdb. > > Find the matching function in System.map. Look for the entry with the > highest address less than or equal to the pc value.
The highest address in System.map is fffffc000076fab0 A _end
/proc/ksyms is more informative. It seems the function is in a module.
fffffffc00254800 ipt_unregister_table [ip_tables] fffffffc00256051 __insmod_ip_tables_S.rodata_L16 [ip_tables]
ipt_unregister_table is the most matching funtion, but makes no sense to me, since I don't load and unload it 2191330 times:-)
Do you have more tips how to find the right funtion in the modules?
> > > Another question: What's the meaning of va? > > It's the virtual memory address being accessed. The va value is > rather close to the pc, so I would guess that it is some static data > from the same source file as the function that is being accessed.
Thank you very much for your help!
Regards
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