insmod hello.ko: -1 Invalid module format ("vermagic" and "uname -r" are the same!)

courteous · 01-13-2011, 06:02 AM

I'm having trouble loading a simple hello.ko module.

Module's vermagic and uname -r are the same, yet

Code:

sudo insmod hello.ko

still returns

Code:

-1 Invalid module format

Aquarius_Girl · 01-13-2011, 06:21 AM

Have you compiled the module successfully through make?

courteous · 01-13-2011, 06:52 AM

This is the make's output:

Code:

blaise@blaise-E520 ~/Documents/seminar/module $ make
make -C /lib/modules/2.6.35.10/build M=/home/blaise/Documents/seminar/module modules
make[1]: Entering directory `/usr/src/linux-2.6.35.10'
  CC [M]  /home/blaise/Documents/seminar/module/hello.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /home/blaise/Documents/seminar/module/hello.mod.o
  LD [M]  /home/blaise/Documents/seminar/module/hello.ko
make[1]: Leaving directory `/usr/src/linux-2.6.35.10'

These files are in the directory:

Code:

hello.c  hello.ko  hello.mod.c	hello.mod.o  hello.o  Makefile	Module.markers	modules.order  Module.symvers

I'm a novice, so you should tell if this is "successful".

Aquarius_Girl · 01-13-2011, 07:50 AM

and your Makefile is exactly as follows? and you have done a 'make clean' too before doing a 'make' again?

Code:

obj-m += hello.o

all:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

courteous · 01-13-2011, 08:01 AM

Yes, Makefile is exactly the same (source: cyberciti.biz).

Now, I've also tried running make clean before make: error "Invalid module format" persists.

Aquarius_Girl · 01-13-2011, 11:18 PM

Well, I have tested the same code here, and it works fine for me, except the fact sudo insmod hello.ko says command not found coz. insmod must be in /sbin. So su worked for me!

arm_8051 · 02-16-2011, 03:29 AM

hi,

can u paste the code here.

Aquarius_Girl · 02-16-2011, 03:37 AM

May I know to whom you are talking to here?

arm_8051 · 02-16-2011, 11:09 PM

hi,

sorry Anisha Kaul,i'm talking to courteous.