Re: Module support

[Jyunji Kondo <j-kondo@xxxxxxxxxxxxxxx>]

> >Currently we are planning following procedure.
> >
> >  1. Extract symbols for debugging modules from
> >     dump file by using a new lcrash option or a
> >     dedicated command.
> 
> Which symbols do you like to extract from the dump?

For example,

  - __insmod_'MODULE NAME'_O'FULL PASS NAME OF MODULE FILE'_...
  - __insmod_'MODULE NAME'_S.text_...
  - __insmod_'MODULE NAME'_S.rodata_...
  - __insmod_'MODULE NAME'_S.data_...

I think there are enough informations to resolve all of loaded
modules' symbols.

> As far as I know, the Linux system stores only information
> about exported kernel symbols (ksyms). Usually only some
> symbols of kernel modules are exported. Hence, your method
> will likely miss the majority of symbol information for modules.

If above-mentioned symbols are retrieved from the dump and written to
a file in /proc/ksyms format, The ksymoops command produces modules'
symbols (include which have unexported attribute) with using this file
and merges them into System.map.

Jyunji Kondo