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

static int pid_mem = 1;

struct gdt_entries
{
	int first, second;
};

static void print_gdt(void)
{
	struct desc_ptr gdt_p;
	int gdt_size, off;
	struct gdt_entries *gdt_base;
	struct gdt_entries gdt_entry;

	store_gdt(&gdt_p);
	gdt_size = gdt_p.size+1;
	gdt_base = (struct gdt_entries*) gdt_p.address;

	for(off=0; off<gdt_size; off++)
	{
		gdt_entry = *(gdt_base+off);
		printk(KERN_INFO "GDT Entry #%d : %.8x %.8x\n", off, gdt_entry.first, gdt_entry.second);
	}
}

static int mm_exp_load(void) 
{
	struct task_struct *task;
	printk(KERN_INFO "\nPID to lookup : %d\n", pid_mem);

	print_gdt();

	return 0;
}

static void mm_exp_unload(void)
{
}

module_init(mm_exp_load);
module_exit(mm_exp_unload);
module_param(pid_mem, int, 0);