RE: Intercept System call using Kernel module is 2.6 kernel

       x=3Dmitesh_func();=20
       printf("mitesh_func returned %d\n",x);

The first thing would be to change your user-space program
to print the error number from errno after your "system call".

        x=3Dmitesh_func();=20
        printf("mitesh_func returned %d, errno=3D%d\n",x,errno);

Or you can use perror() -- look it up.

Clive
 =20


4) I verify from the system logs that when I insmod the kernel module I
get all the print statements. I verified from the logs  that the address
of the sys_call_table is correctly passed and from /proc/kallsysms I can
see that my function mitesh_func has been defined and has the address as
indicated in the logs.=20

The problem is that when I execute my user app I expect to see two
things:=20
 a) I should see a message in the log "Executing mitesh_func..." and=20
 b) A return value of 2=20

However I get an error value -1 returned.=20

Any help and ideas are highly appreciated. =20

Thank you in advance,=20
Mitesh=20