"Finishing"--linux simple kernel module development

1. Linux kernel modules are not compiled into kernel files (zimage,bzimage), but are dynamically installed and uninstalled during runtime

2, the kernel module includes a few parts: main part design, compile kernel module, install uninstall NHMK, optional use (module declaration, MK parameter, symbol output)

3, simple example:

HELLO.C:

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>

Module_license ("Dual BSD/GPL");

static int hello_init (void)
{
PRINTK (kern_alert "hello_init \ n");
return 0;
}

static void Hello_exit (void)
{
PRINTK (Kern_alert "goodbye,kernel!\n");
}

Module_init (Hello_init);
Module_exit (Hello_exit);

Module_author ("APOLLO"); Author
Module_description ("This was a simple example\n"); Module description
Module_alias ("A Simple Example"); Alias

Makefile:

obj-m:=hello.o
PWD: = $ (shell pwd)

kdir:=/lib/modules/3.13.0-45-generic/build/

All
Make-c $ (Kdir) m=$ (PWD) modules
Clean
RM-RF *.mod.c *.mod.o *.ko *.o *.tmp_versions *.order *symvers

"Finishing"--linux simple kernel module development