1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/gdt.h b/kernel/gdt.h
index 9ae366c..9e5a6a5 100644
--- a/kernel/gdt.h
+++ b/kernel/gdt.h
@@ -1,3 +1,15 @@
 #pragma once
 
+enum {
+	SEG_null,
+	// order dictated by SYSENTER
+	SEG_r0code,
+	SEG_r0data,
+	SEG_r3code,
+	SEG_r3data,
+	SEG_TSS,
+
+	SEG_end
+};
+
 void gdt_init();