Grant to allow passing data to scheme handler

arch/x86_64/src/context.rs

@@ -43,6 +43,10 @@ impl Context {
         }
     }
 
+    pub fn get_page_table(&self) -> usize {
+        self.cr3
+    }
+
     pub fn set_page_table(&mut self, address: usize) {
         self.cr3 = address;
     }