finished gdt mechanisms

2026-04-10 21:05:46 +00:00
parent c4bed9000d
commit d3d8b973c0
14 changed files with 256 additions and 2 deletions
--- a/src/OSDev_18/include/kernel/gdt.h
+++ b/src/OSDev_18/include/kernel/gdt.h
@@ -0,0 +1,26 @@
+#ifndef KERNEL_GDT_H
+#define KERNEL_GDT_H
+
+#include <libc/stdint.h>
+
+#define GDT_NULL_SELECTOR 0x00
+#define GDT_CODE_SELECTOR 0x08
+#define GDT_DATA_SELECTOR 0x10
+
+struct GdtEntry {
+    uint16_t limit_low;
+    uint16_t base_low;
+    uint8_t base_middle;
+    uint8_t access;
+    uint8_t granularity;
+    uint8_t base_high;
+} __attribute__((packed));
+
+struct GdtDescriptor {
+    uint16_t size;
+    uint32_t offset;
+} __attribute__((packed));
+
+void gdtInitialize(void);
+
+#endif