Improved build system

Added new entries to .gitignore
Moved away from source directory as central spot for all source code

kernel/memory/gdt/gdtc.h

@@ -0,0 +1,35 @@
+#pragma once
+#include <stdint.h>
+
+
+#define NULL_SEGMENT          0
+#define KERNEL_CODE_SEGMENT   1
+#define KERNEL_DATA_SEGMENT   2
+#define USER_CODE_SEGMENT     3
+#define USER_DATA_SEGMENT     4
+#define TASK_STATE_SEGMENT    5
+
+
+
+struct SegmentDescriptor {
+   unsigned short limit_low;
+   unsigned short base_low;
+   unsigned char base_middle;
+   unsigned char access;
+   unsigned char granularity;
+   unsigned char base_high;
+}__attribute__((packed));
+
+extern SegmentDescriptor GlobalDescriptorTable[6];
+
+struct GlobalDescriptorTableDescriptor{
+   unsigned short limit;
+   unsigned int base;
+}__attribute__((packed)) ;
+
+
+
+void add_descriptor(int which , unsigned long base, unsigned long limit, unsigned char access, unsigned char granularity );
+
+
+void initGDT();