help with insmod and rmmod

jaepi · 05-28-2007, 05:09 AM

a module i mean. it'll print hello world using the insmod command

Franklin52 · 05-28-2007, 05:31 AM

Try as root:

Code:

/sbin/insmod hello.ko

Regards

jaepi · 05-28-2007, 07:31 AM

im logged as root and i get this one:

Code:

[root@localhost dev-drive]# gcc -c hello.c
[root@localhost dev-drive]# /sbin/insmod ./hello.o
insmod: error inserting './hello.o': -1 Invalid module format

Franklin52 · 05-28-2007, 08:14 AM

Try:

Code:

/sbin/insmod hello.ko

not:

Code:

/sbin/insmod hello.o

Kernel 2.6 introduces a new file naming convention for kernel modules. Now the extension is .ko in place of the old .o

Regards

jaepi · 05-28-2007, 08:46 PM

i tried it and this is what i get

Code:

[root@localhost dev-drive]# gcc -c hello.c
[root@localhost dev-drive]# /sbin/insmod ./hello.ko
insmod: can't read './hello.ko': No such file or directory

jaepi · 05-28-2007, 08:46 PM

i tried it and this is what i get

Code:

[root@localhost dev-drive]# gcc -c hello.c
[root@localhost dev-drive]# /sbin/insmod ./hello.ko
insmod: can't read './hello.ko': No such file or directory

osor · 05-28-2007, 09:42 PM

Quote:

Originally Posted by jaepi

Code:

[root@localhost dev-drive]# gcc -c hello.c

I don’t think you can do just this anymore (even when you could, you needed many more arguments). I think the preferred method of making a module out of your source is to use the kernel’s own build system. Execute something like this from the directory containing hello.c (and no, you shouldn’t need to be root for it to compile):

Code:

$ make -C /lib/modules/$(uname -r)/build M=$PWD obj-m=hello.o

Of course, it would be much easier to create a Makefile that does this sort of thing for you.