From: Keith Owens <kaos@ocs.com.au>
To: linux-kernel@vger.kernel.org
Subject: New module loader makes kernel debugging much harder
Date: Sat, 23 Nov 2002 13:20:10 +1100 [thread overview]
Message-ID: <13542.1038018010@ocs3.intra.ocs.com.au> (raw)
The new module loader makes kernel debugging much harder.
There is no section information available, which means ...
* ksymoops cannot decode oops in modules. Without section data, there
is no way to reliably determine where module symbols were loaded.
* kgdb cannot debug modules. gdb needs to know which modules are
loaded and where each section of each module starts.
* kdb cannot display the section for a symbol. Which means the user
cannot do
objdump -j <section_name> --adjust-vma=<start_address> module
to map the code to the original object and source.
The complete lack of kernel and module symbols (no /proc/ksyms) means
that ksymoops is now useless on 2.5 kernels. If you get an oops in a
kernel built without kksymoops, there is no way to decode the oops.
Big step backwards, Rusty.
next reply other threads:[~2002-11-23 2:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-23 2:20 Keith Owens [this message]
2002-11-23 2:35 ` New module loader makes kernel debugging much harder John Levon
2002-11-23 2:43 ` Keith Owens
2002-11-23 16:23 ` John Levon
2002-11-24 0:49 ` Keith Owens
2002-11-24 1:06 ` John Levon
2002-11-24 1:18 ` Keith Owens
2002-11-24 1:34 ` John Levon
2002-11-25 1:26 ` Rusty Russell
2002-11-23 4:22 ` Jamie Lokier
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