CamilStaps-s4498062-Assignment-2/ex2/hello-cr4.c


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

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Camil Staps");
MODULE_DESCRIPTION("A Simple Hello World module");

static int __init hello_init(void) {
    unsigned long long result;
    __asm__("movq %%cr4, %%rax\n" : "=a"(result));
    printk(KERN_INFO "Hello world! CR4 = %11x\n", result);
    return 0;
}

static void __exit hello_cleanup(void) {
    printk(KERN_INFO "Cleaning up module.\n");
}

module_init(hello_init);
module_exit(hello_cleanup);