Made the interrupt entry also safe the registers DS to GS.

This may be removed in the future for speed purposes.

arch/x86/include/asm/stddef.h

@@ -70,6 +70,18 @@ typedef unsigned int wint_t;
  * All the interrupt handler routines use this type for their only parameter.
  */
 struct state {
+	/// GS register
+	unsigned short gs;
+	unsigned short __gs;
+	/// FS register
+	unsigned short fs;
+	unsigned short __fs;
+	/// ES register
+	unsigned short es;
+	unsigned short __es;
+	/// ds register
+	unsigned short ds;
+	unsigned short __ds;
 	/// EDI register
 	unsigned int edi;
 	/// ESI register

arch/x86/kernel/entry.asm

@@ -767,13 +767,22 @@ extern irq_handler
 
 common_stub:
     pusha
+    push ds
+    push es
+    push fs
+    push gs
 
     ; use the same handler for interrupts and exceptions
     push esp
     call irq_handler
     add esp, 4
 
+    pop gs
+    pop fs
+    pop es
+    pop gs
     popa
+
     add esp, 8
     iret