Re: (kernel 2.6.9) insmod: -1 Invalid module format
From: Randy.Dunlap (rddunlap_at_osdl.org)
Date: 12/03/04
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Date: Thu, 02 Dec 2004 21:13:27 -0800 To: Stephane Coulombe Bisson <stephcoul@aei.ca>
Stephane Coulombe Bisson wrote:
> Hi,
>
> I'm new to Linux module dev, I copied a very simple module from a book
> (http://lwn.net/Kernel/LDD2/ch02.lwn) and I can't insert it into the
> kernel.
>
> I found hundreds of bug reports about it on google without any solution.
> I must be doing something wrong...
>
> /*----------mymodule.c-----------*/
> #define MODULE
> #include <linux/module.h>
> int init_module(void)
> { printk("<1>Hello, world\n"); return 0; }
> void cleanup_module(void)
> { printk("<1>Goodbye cruel world\n"); }
> /*----------EOF-----------*/
>
> # gcc -c mymodule.c
> # insmod mymodule.o
> insmod: error inserting 'mymodule.o': -1 Invalid module format
a. You need to use more than 'gcc -c module.c' to build a module
for Linux 2.6.x. See current linux/Documentation/kbuild/*.txt .
b. You load a module file named "mymodule.ko" for Linux 2.6.x,
not "mymodule.o".
c. Make sure that you are using current module-init-tools package.
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