Re: How to run a hello world module

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Hi Chaitannya,

On Thu, Dec 9, 2010 at 5:51 PM, Chaitannya Mahatme <chaitannya@xxxxxxxxx> wrote:
>
> Hello everyone,
>
> I am trying to compile a hello world module given over here
>
> I have followed the following step.
>
> Downloaded Linux kernel 2.6.35-rc5
> extracted to directory /general/source/linux
> Complied the entire kernel.
> created a dir test in the linux folder.
> Created and complied a hello world module as mentioned there.
>
> when I run the insmod command, I get this error
>
> insmod: error inserting 'hello.ko': -1 Invalid module format
>
> What I have read is that the error is result of kernel mismatch. How do I
> sort out this error?

Are you running the 2.6.35-rc5 kernel?

If you run modinfo on the module, look for the vermagic string.

You can get most of the information about the kernel that you're
running by using

cat /proc/version

The kernel version, compiler version and stuff like SMP, PREEMPT
4KSTACKS etc all have to match with the vermagic info from your
module.

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/

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