1 files changed, 17 insertions, 0 deletions
diff --git a/src/kernel/include/gdt.h b/src/kernel/include/gdt.h
new file mode 100644
index 0000000..a62d0db
--- /dev/null
+++ b/src/kernel/include/gdt.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+/*	The GDT is one of the x86's descriptor tables. It is used for memory segmentation.
+	Here, we don't use segmentation to separate processes from one another (this is done with paging).
+	We only use segmentation to make the difference between kernel mode (ring 3) and user mode (ring 0) */
+
+void gdt_init();
+
+#define K_CODE_SEGMENT 0x08
+#define K_DATA_SEGMENT 0x10
+#define U_CODE_SEGMENT 0x18
+#define U_DATA_SEGMENT 0x20
+
+/* vim: set ts=4 sw=4 tw=0 noet :*/