cr0.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/system.h>

int init_module(void)
{
	int cr0 = native_read_cr0();
	printk(KERN_INFO "cr0 before: %x\n", cr0);
	cr0 = cr0 >> 1;
	cr0 = cr0 << 1;
	native_write_cr0(cr0);
	cr0 = native_read_cr0();
	printk(KERN_INFO "cr0 after: %x\n", cr0);
	return 0;
}

void cleanup_module(void)
{
	printk(KERN_INFO "cr0 unloaded\n");
}

MODULE_LICENSE("GPL");