problem with insmod

problem with insmod

[Arrigo Benedetti]

First of all I would like to thank everyone in this list who has 
answered my questions so far, especially Ben...

Now I'm trying to write and and install a kernel module on 2.6, YDL 4.0. 
I compiled the example module by
Alessandro Rubin at http://www.linux.it/~rubini/docs/modules26/src.tar.gz
When I try to load it with insmod I get:

[root@localhost root]#  insmod empty.ko
insmod: error inserting '/home/arrigo/linux/modules/src/empty.ko': -1 
Invalid module format

After some research I found that to load a module on the 2.6 kernel one 
should insmod from module-init-tools 
<ftp://ftp.it.kernel.org/pub/linux/utils/kernel/module-init-tools/>,
not the default insmod from the modutils package that comes with YDL.
So I compile and install module-init-tools, but I get the same error.
Does anyone know what's going on?

Thanks
-Arrigo

Re: problem with insmod

[evilninja]

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Arrigo Benedetti schrieb:
> After some research I found that to load a module on the 2.6 kernel one

yes, http://www.linux.org.uk/~davej/docs/post-halloween-2.6.txt is a good
start for 2.4 -> 2.6 upgrades.

> So I compile and install module-init-tools, but I get the same error.
> Does anyone know what's going on?

hm, are you sure the new "insmod" and "modprobe" are the *right* ones?
the PATH  variable will help here or try to specify the exact path on the
cmd line. here i have:

evil@prinz:~$ /sbin/modprobe -V
module-init-tools version 3.1-pre6
vil@prinz:~$ file /sbin/modprobe*
/sbin/modprobe:           ELF 32-bit LSB executable, Intel 80386, [...]
/sbin/modprobe.Lmodutils: symbolic link to `insmod'
/sbin/modprobe.modutils:  symbolic link to `insmod.modutils'

Christian.
- --
BOFH excuse #391:

We already sent around a notice about that.
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Re: problem with insmod

[Arrigo Benedetti]

evilninja wrote:

>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>Arrigo Benedetti schrieb:
>  
>
>>After some research I found that to load a module on the 2.6 kernel one
>>    
>>
>
>yes, http://www.linux.org.uk/~davej/docs/post-halloween-2.6.txt is a good
>start for 2.4 -> 2.6 upgrades.
>
>  
>
>>So I compile and install module-init-tools, but I get the same error.
>>Does anyone know what's going on?
>>    
>>
>
>hm, are you sure the new "insmod" and "modprobe" are the *right* ones?
>the PATH  variable will help here or try to specify the exact path on the
>cmd line. here i have:
>
>evil@prinz:~$ /sbin/modprobe -V
>module-init-tools version 3.1-pre6
>vil@prinz:~$ file /sbin/modprobe*
>/sbin/modprobe:           ELF 32-bit LSB executable, Intel 80386, [...]
>/sbin/modprobe.Lmodutils: symbolic link to `insmod'
>/sbin/modprobe.modutils:  symbolic link to `insmod.modutils'
>
>  
>

Yes, I have verified that. Someone has also suggested to check that the 
compiler used to build the module
is the same compiler that build the kernel. The Makefile is below and it 
seems that this is also ok.

-Arrigo

ifndef KERNELRELEASE
   
     LINUX ?= /usr/src/linux-2.6
     PWD := $(shell pwd)
     all:
	     $(MAKE) -C $(LINUX) SUBDIRS=$(PWD) modules
     clean:
	     rm -f *.o *.ko *~ core .depend *.mod.c *.cmd    
   
   else
     obj-m := empty.o

   endif

Re: problem with insmod

[evilninja]

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Arrigo Benedetti schrieb:
> Yes, I have verified that. Someone has also suggested to check that the
> compiler used to build the module
> is the same compiler that build the kernel. The Makefile is below and it
> seems that this is also ok.

hm, i've built module-init-tools from source too once, but now your distro
of choice will hat a binary package too, i think. maybe you can go with
this package to get modules in 2.6 running and can go on with the
debugging of your compiled version afterwards. (maybe "strace modprobe"
will help here...? or is the module itself not proper compiled? (make
mrproper)...)

just my 2¢....
- --
BOFH excuse #16:

somebody was calculating pi on the server
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