Re: searching exported symbols from modules

From: Keith Owens
Date: Fri Apr 21 2006 - 03:33:34 EST


"Antti Halonen" (on Wed, 19 Apr 2006 16:08:37 +0300) wrote:
>
>Hi Dick,
>
>Thanks for your response.
>
>> `insmod` (or modprobe) does all this automatically. Anything that's
>> 'extern' will get resolved. You don't do anything special. You can
>> also use `depmod` to verify that you won't have any problems loading.
>> `man depmod`.
>
>Yes, I know insmod and herein the problem lies. I have a module where
>I want to use functions provided by another module, _if_ it is present,
>otherwise use modules internal functions.

symbol_get() and symbol_put(). See include/linux/module.h. If
symbol_get() returns NULL then the symbol does not exist.

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