debugging kernel modules

Wolfgang has a nice tutorial on this:
http://www.denx.de/doc/TQM8xxL/debugging.html

But here's the question - is there any way to dump the
module load addresses, after the fact?  'insmod -m'
works well if you always remember to use it to load
the module.  FreeBSD has 'kldstat' which dumps module
address information at any time.  Is there anything
similar to kldstat for linux?  If not, any comments on
how hard it would be to write one?

-Brian


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apropos modules -> lsmod; man lsmod -> ksyms;
man ksyms -> "ksyms -m"

Does this help?

Brian Kuschak wrote:

Wolfgang has a nice tutorial on this:
http://www.denx.de/doc/TQM8xxL/debugging.html

But here's the question - is there any way to dump the
module load addresses, after the fact?  'insmod -m'
works well if you always remember to use it to load
the module.  FreeBSD has 'kldstat' which dumps module
address information at any time.  Is there anything
similar to kldstat for linux?  If not, any comments on
how hard it would be to write one?

-Brian

--
Dan.Taylor@atlp.com

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Thanks Dan, I think that's it.  With a little bit of
scripting I should be able to make it work nicely.

--- "Daniel L. Taylor" <Dan.Taylor@atlp.com> wrote:

apropos modules -> lsmod; man lsmod -> ksyms;
man ksyms -> "ksyms -m"

Does this help?

Brian Kuschak wrote:

quoted

Wolfgang has a nice tutorial on this:
http://www.denx.de/doc/TQM8xxL/debugging.html

But here's the question - is there any way to dump

the

quoted

module load addresses, after the fact?  'insmod

-m'

quoted

works well if you always remember to use it to

load

quoted

the module.  FreeBSD has 'kldstat' which dumps

module

quoted

address information at any time.  Is there

anything

quoted

similar to kldstat for linux?  If not, any

comments on

quoted

how hard it would be to write one?

-Brian

--
Dan.Taylor@atlp.com

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Brian Kuschak wrote:

But here's the question - is there any way to dump the
module load addresses, after the fact?  'insmod -m'

If necessary, it also works without tools.

The linux kernel has the symbol module_list, which contains a linked
list of all modules. You can follow the linked list until you find your
module. Take the address of the struct module list entry (!) and add
(size_of_struct+4). Then you get to the start address of your module.

E.g.:
&struct module = 0xc100b000
size_of_struct = 0x60

=> .text = 0xc1000064


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