From c6bdd600d790cdf690f4a2674175633210029963 Mon Sep 17 00:00:00 2001
From: manzerbredes <loic.guegan_secondary@yahoo.fr>
Date: Tue, 21 Jul 2015 12:19:25 +0400
Subject: [PATCH] Implement Gdt constructor

---
 kernel/GDT/gdt.cpp | 30 +++++++++++++++++++++---------
 kernel/GDT/gdt.hpp | 22 +++++++++++-----------
 2 files changed, 32 insertions(+), 20 deletions(-)

diff --git a/kernel/GDT/gdt.cpp b/kernel/GDT/gdt.cpp
index 00a7025..4e2c28c 100644
--- a/kernel/GDT/gdt.cpp
+++ b/kernel/GDT/gdt.cpp
@@ -3,17 +3,29 @@
 
 
 Gdt::Gdt(){
-	//Init desc 1 (0 conventional)
-	//Init desc 2 (code segment)
-	//Init desc 3 (data segment)
-	//Init desc 4 (stack segment)
-	
-	
+
+    //Init conventional segment
+    this->initGdtDesc(0x0,0x0,0x0,0x0, &m_Descriptors[0]);
+
+    //Init code segment
+    this->initGdtDesc(0x0,0xFFFFF,0x9A,0x0D, &m_Descriptors[1]);
+
+    //Init data segment
+    this->initGdtDesc(0x0,0xFFFFF,0x92,0x0D, &m_Descriptors[2]);
+
+    //Init stack segment
+    this->initGdtDesc(0x00B00000,0x00000500,0x96,0x0D, &m_Descriptors[3]);
+
+
+    //Init GDT Pointer
+    this->m_Pointer.size=4*sizeof(this->m_Descriptors);
+    this->m_Pointer.segment=0x00007E00;
+
 
 }
 
 Gdt::~Gdt(){
-	
+
 }
 
 void Gdt::initGdtDesc(u32 base, u32 limit, u8 access, u8 flags, gdtDescriptorStruct *Descriptor){
@@ -23,11 +35,11 @@ void Gdt::initGdtDesc(u32 base, u32 limit, u8 access, u8 flags, gdtDescriptorStr
 	Descriptor->access = access;
 	Descriptor->limit2 = (limit & 0xF0000 ) >> 16;
 	Descriptor->flags = flags & 0xFF;
-	Descriptor->base3 = (base & 0xFF000000) >> 24; 
+	Descriptor->base3 = (base & 0xFF000000) >> 24;
 }
 
 void Gdt::loadGdt(){
-	//Copy Gdt into memory
+	//Copy Gdt into memory and init registers
 }
 
 
diff --git a/kernel/GDT/gdt.hpp b/kernel/GDT/gdt.hpp
index d830e3f..f6caa3d 100644
--- a/kernel/GDT/gdt.hpp
+++ b/kernel/GDT/gdt.hpp
@@ -14,7 +14,7 @@ struct gdtDescriptorStruct{
 	u16 limit1;
 	u16 base1;
 	u8 base2;
-	u8 access : 4;
+	u8 access;
 	u8 limit2 : 4;
 	u8 flags : 4;
 	u8 base3;
@@ -25,30 +25,30 @@ typedef struct gdtPointerStruct gdtPointerStruct;
 typedef struct gdtDescriptorStruct gdtDescriptorStruct;
 
 
-//Gdt class 
+//Gdt class
 class Gdt{
-	
+
 	private:
-	
+
 		//Data members
-		gdtDescriptorStruct m_Descriptor[4];
+		gdtDescriptorStruct m_Descriptors[4];
 		gdtPointerStruct m_Pointer;
-		
+
 		//Methods
 		void initGdtDesc(u32 base, u32 limit, u8 access, u8 flags, gdtDescriptorStruct *Descriptor);
 
-	
+
 	public:
-		
+
 		//Constructor
 		Gdt();
-		
+
 		//Destructor
 		~Gdt();
-	
+
 		//Methods
 		void loadGdt();
-	
+
 };