[Buildroot] building kernel modules
Roman Chertov
rchertov at cs.ucsb.edu
Wed Nov 11 19:52:43 UTC 2009
Daniel Mack wrote:
> On Tue, Nov 10, 2009 at 09:18:33AM -0800, Roman Chertov wrote:
>> Turns out it was a division of a long that was causing that. After I
>> changed the long to a uint32_t then the problem went away. Now, I have
>> to figure out why I cannot insert the module.
>>
>> musec_can: unknown relocation: 40
>> insmod: can't insert
>> '/proj/tools/can_driver/musec_can/src/musec_can.ko': invalid module format
This was due to a kernel bug
http://lkml.indiana.edu/hypermail/linux/kernel/0903.3/02813.html
The patch provided in the link fixed the problem for me.
>>
>> Modules built during the kernel built work fine. I guess I have to
>> figure out what linker setting I am missing.
>
> See dmesg for more of the reason. There's a comprehensive guideline I
> can point you to, just in case that differs from what you did:
>
> http://lwn.net/Articles/21823/
>
>>> After all, what you're seeing is an effect that has to do with your
>>> code, the kernel and gcc. And not with buildroot :)
>> True. I was just hoping that somebody would give me a starting point as
>> I new to cross compiling :) Thanks for the help.
>
> No problem :)
>
> Daniel
>
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