Link a Library to a Kernel Modul
We have the structure:
|
|-Makefile
|-hello.c
|-hello_lib.c
|-hello_lib.h
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
clean:
rm -f *.o
rm -f *.ko
rm -fr .tmp_versions
rm -f Modules.symvers
rm -f *.a
rm -f *.mod.c
rm -f .*.cmd
Test it with:
insmod ./test.ko
Remove the module with:
rmmod test
Maybe you want this here:
insmod ./test.ko && rmmod test
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