Could someone please answer a stupid question...

Question

I have the following bare-bones kernel module...

------------------------------------------------------ #ifndef __KERNEL__ #define __KERNEL__ #define MODULE #include

int init_module(void) { printk("Hello, World\n"); return 0; }

void cleanup_module(void) { printk("I'm outta here...\n"); }

#endif

------------------------------------------------------

I compile with...

[blah@localhost blah] gcc -O2 -Wall -D__KERNEL__ -DMODULE

-I/usr/src/linux/include/ -c blah.c

So far no problems. I should point out that this module is intended for another system, and the sources at /usr/src/linux match that of the target. When I move blah.o to the other system, I get this...

bash-2.05# /sbin/insmod blah.o blah.o: couldn't find the kernel version the module was compiled for

Sure... let's try that again...

bash-2.05# /sbin/insmod -f blah.o blah.o: couldn't find the kernel version the module was compiled for

Could someone shed some light?? TIA

Pat Kohli · Accepted Answer

");");Are you running this classic in X-Windows?  If so, your "Hello, World"message should appear in /var/log/messages.Are you wondering what you can do to make the kernel version message goaway?  Skip up to page 26, and try#define __NO_VERSION__// before#include I'm going to fire up the source for a simple driver which I was workingon, and let you know if I see anything else.I hope this works, one or the other, or both.- Patkohli at PS, I'm assuming that you are using Rubini and Corbet's O'Reilly book asan aid.  If so, what is yor impression?

Roger Larsson · Answer

This is taken from the computer you compile at... And does not match the targets.

You should/could set up a mirror of the target in some directory (like ~/target) and then compile with

gcc -nostdinc -I ~/target/include -nostdlib ...

/RogerL

jahurt · Answer

");");Sorry it's taken me this long to reply... I did get this to work,although I honestly don't know what I did differently to get this towork...I know... problem was that I never got this far... the module wouldcompile without complaint but wouldn't install, even with an '-f'Thanks, I'll give this a shot next time this comes up (and I have afeeling it will) :)I nearly wore that book out my senior year of college :)  Also good is"Understanding the Linux Kernel' by Bovet and Cesati, although it's abit more dated.

Could someone please answer a stupid question...

Join the Discussion

Didn't find your answer?