Added the Global Descriptor Table.

2020-06-19 12:08:17 -05:00
parent b409b3e9d2
commit 84f64badaf
6 changed files with 102 additions and 5 deletions
@@ -0,0 +1,22 @@
+#ifndef GDT_H
+#define GDT_H
+
+struct gdt {
+	unsigned short size;
+	unsigned int address;
+} __attribute__((packed));
+
+struct gdt_entry
+{
+    unsigned short limit_low;
+    unsigned short base_low;
+    unsigned char base_middle;
+    unsigned char access;
+    unsigned char granularity;
+    unsigned char base_high;
+} __attribute__((packed));
+
+void gdt_install();
+void load_gdt(struct gdt *);
+void gdt_set_gate(unsigned long, unsigned long, unsigned char, unsigned char, struct gdt_entry*);
+#endif
@@ -1,5 +1,4 @@
 #ifndef KERNEL_H
 #define KERNEL_H
-
-int strlen(char*);
+void kmain();
 #endif