Hello Module - Compilation creates Modules.symvers

Hi All,

I just tried to compile the Hello.c Module as stated in the "Linus Kernel Module Programming Guide" and i'm getting the follwing output.

linux-toej:/home/raj/program # make
make -C /lib/modules/2.6.16.21-0.25-smp/build M=/home/raj/program modules
make[1]: Entering directory `/usr/src/linux-2.6.16.21-0.25-obj/i386/smp'
make -C ../../../linux-2.6.16.21-0.25 O=../linux-2.6.16.21-0.25-obj/i386/smp modules
Building modules, stage 2.
MODPOST
make[1]: Leaving directory `/usr/src/linux-2.6.16.21-0.25-obj/i386/smp'


Instead of creating hello.ko I have 2 files namely 'Modules.symvers' , '.tmp_versions'

DIR command is shown below:


linux-toej:/home/raj/program # dir
total 8
-rw-r--r-- 1 root root 190 2006-11-13 19:05 hello.c
-rw-r--r-- 1 root root 190 2006-11-13 19:12 Makefile
-rw-r--r-- 1 root root 0 2006-11-13 19:40 Modules.symvers
drwxr-xr-x 2 root root 48 2006-11-14 19:57 .tmp_versions



Please help me to compile this module. Seems I messed up something with the Kernel source.

Thanks a lot,

Raj

Are u using, exactly the same Makefile that the Guide says?
Do you have your kernel sources properly installed?

Best Regards

Here is the code i'm trying to compile.

hello-1.c
#include <linux/module.h> /* Needed by all modules */
#include <linux/kernel.h> /* Needed for KERN_INFO */
int init_module(void)
{
printk(KERN_INFO "Hello world 1.\n");
/*
* A non 0 return means init_module failed; module can't be loaded.
*/
return 0;
}
void cleanup_module(void)
{
printk(KERN_INFO "Goodbye world 1.\n");
}



Makefile:
obj−m += hello-1.o
all:
make -C /lib/modules/$(shell uname -r)/build M=/home/raj/program modules
clean:
make −C /lib/modules/$(shell uname -r)/build M=/home/raj/program clean

~

hey guy ...
I am using fedora core 6.0 . I am trying to compile a kernel hello world program .. buts its not compiling .. its giving lots of error . Can any one please tell me how to compile a kernel program .
but the same program is compiling in 2.4 kernel .


Here is my code ....
/************************************************** *******************************/
#define __KERNEL__

#define MODULE


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/config.h>

MODULE_LICENSE("GPL");

int int_module()
{
printk(KERN_INFO"\n hello world \n");
}

void cleanup_module()
{
printk(KERN_INFO "\n Goodbye kernel\n");
}
/************************************************** *************************************/


And i am compiling by this command ....

gcc -c -I /usr/src/kernels/2.6.18-1.2798.fc6-i686/include/linux hello.c

Can any one please tell me .whats worng in my progam ....

Regards,
dinesh