From 58e7cc77d08fd3fb73a8ffd16e397fb93e1b1d94 Mon Sep 17 00:00:00 2001
From: Philipp Oppermann <dev@phil-opp.com>
Date: Wed, 28 Dec 2016 16:22:02 +0100
Subject: [PATCH] Data segment descriptors are not needed in 64-bit mode

---
 src/arch/x86_64/boot.asm | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/src/arch/x86_64/boot.asm b/src/arch/x86_64/boot.asm
index a9d7a6bb..b4ff26f1 100644
--- a/src/arch/x86_64/boot.asm
+++ b/src/arch/x86_64/boot.asm
@@ -29,12 +29,6 @@ start:
     ; load the 64-bit GDT
     lgdt [gdt64.pointer]
 
-    ; update selectors
-    mov ax, gdt64.data
-    mov ss, ax
-    mov ds, ax
-    mov es, ax
-
     jmp gdt64.code:long_mode_start
 
 set_up_page_tables:
@@ -202,9 +196,7 @@ section .rodata
 gdt64:
     dq 0 ; zero entry
 .code: equ $ - gdt64 ; new
-    dq (1<<44) | (1<<47) | (1<<41) | (1<<43) | (1<<53) ; code segment
-.data: equ $ - gdt64 ; new
-    dq (1<<44) | (1<<47) | (1<<41) ; data segment
+    dq (1<<44) | (1<<47) | (1<<43) | (1<<53) ; code segment
 .pointer:
     dw $ - gdt64 - 1
     dq gdt64