Implemented GDT initialisation

2022-12-24 10:28:41 +00:00
parent 0c0830cca7
commit 26853c32c8
10 changed files with 129 additions and 3 deletions
--- a/arch/x86_64/gdt_load.S
+++ b/arch/x86_64/gdt_load.S
@@ -0,0 +1,28 @@
+.section .text
+
+.global gdt_load
+.type gdt_load, @function
+
+gdt_load:
+	pushq %rbp
+	movq %rsp, %rbp
+
+	lgdt (%rdi)
+
+	mov $0x10, %ax
+	mov %ax, %ss
+	mov %ax, %ds
+	mov %ax, %es
+	mov %ax, %fs
+	mov %ax, %gs
+
+	movabsq $(gdt_load2), %rax
+
+	push $0x08
+	push %rax
+
+	lretq
+
+gdt_load2:
+	popq %rbp
+	ret