reimplements the gdt

kernel/kmain.c

@@ -1,10 +1,24 @@
 #include <stdio.h>
+#include <stdint.h>
 
 #include <kernel/tty.h>
 #include <kernel/serial.h>
+#include <kernel/x86/gdt.h>
+
+uint64_t gdt[5];
 
 void kmain(void)
 {
+	gdt[0] = create_descriptor(0, 0, 0); // null
+	gdt[1] = create_descriptor(0, 0x000FFFFF, (GDT_CODE_PL0));
+	gdt[2] = create_descriptor(0, 0x000FFFFF, (GDT_DATA_PL0));
+	gdt[3] = create_descriptor(0, 0x000FFFFF, (GDT_CODE_PL3));
+	gdt[4] = create_descriptor(0, 0x000FFFFF, (GDT_DATA_PL3));
+
+	setGdt((sizeof(uint64_t) * 5) - 1, &(gdt[0]));
+	reloadSegments();
+	
+
 	terminal_initialize();
 	serial_initialize();