X86 LINUX Driver “Hello world!” example

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Source:

#include <linux/init.h>#include <linux/module.h>MODULE_LICENSE("Dual BSD/GPL");static int mmap_init(void){printk(KERN_ALERT"Hello world!\n");return 0;}static void mmap_exit(void){printk(KERN_ALERT"Bye World!\n");}module_init(mmap_init);module_exit(mmap_exit);

Makefile:

#obj-$(CONFIG_MMP_TEST)+= mmap.oobj-m := mmap.o  KERNELDR := /usr/src/linux-headers-2.6.32-38-generic/PWD := $(shell pwd)  modules:  $(MAKE) -C $(KERNELDR) M=$(PWD) modules  moduels_install:  $(MAKE) -C $(KERNELDR) M=$(PWD) modules_install  clean:  rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions