linux-kernel - Re: Link lib to a kernel module

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Message-ID: <20061025123004.GB86838@server.idefix.loc>
Date:	Wed, 25 Oct 2006 14:30:05 +0200
From:	Matthias Fechner <idefix@...hner.net>
To:	linux-kernel@...r.kernel.org
Subject: Re: Link lib to a kernel module

Hello Dipti,

* Dipti Ranjan Tarai <dipti@...omedia.soft.net> [25-10-06 11:16]:
> Now in mod2 call test_export() of mod1, compile it and load the module u 
> can able to access test_export().

thx for that hint, but I want one module :)

I was now successfull with the following code:
hello_lib.h:
int printHello(int);

hello_lib.c
int printHello(int count)
{
   int i;
      
   for(i=0;i<=count;i++)
   {
      printk("Hello World\n");
   }
		        
   return 0;
}
			   
hello.c:
#include <linux/kernel.h>
#include <linux/module.h>
#include "hello_lib.h"
			   
MODULE_LICENSE("GPL");
			   
int init_module(void)
{
    printk("call function\n");
    printHello(5);
    return 0;
}
				    
void cleanup_module(void)
{
    printk(KERN_INFO "remove module\n");
    return;
}
					  
Makefile:
KDIR    := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

obj-m += test.o
test-y := hello.o libhello_lib.a

all:
    gcc -I/usr/include -c -o hello_lib.o hello_lib.c
    rm -f libhello_lib.a
    ar cru libhello_lib.a hello_lib.o
    $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules KBUILD_VERBOSE=1
				      

Best regards,
Matthias

-- 

"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the universe trying to
produce bigger and better idiots. So far, the universe is winning." --
Rich Cook
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