From 62d7fa83e831e84ea851d97b5c957146880ad69a Mon Sep 17 00:00:00 2001
From: Fabian Imhof <fabian.imhof@ost.ch>
Date: Thu, 10 Apr 2025 10:28:46 +0000
Subject: move context_switch function into cpp code

---
 arch/x86_64/src/boot/boot.s | 30 ------------------------------
 1 file changed, 30 deletions(-)

(limited to 'arch/x86_64/src/boot')

diff --git a/arch/x86_64/src/boot/boot.s b/arch/x86_64/src/boot/boot.s
index 139fd1a..7932045 100644
--- a/arch/x86_64/src/boot/boot.s
+++ b/arch/x86_64/src/boot/boot.s
@@ -352,36 +352,6 @@ prepare_page_maps:
 .section .boot_text, "ax", @progbits
 .code64
 
-test_function:
-    cli
-    ret
-
-.global context_switch
-context_switch:
-    // ring 3 data with bottom 2 bits set for ring 3
-	mov $((4 * 16) | 3), %rax
-    mov %rax, %ds
-    mov %rax, %es
-    mov %rax, %fs
-    mov %rax, %gs
-    // SS is handled by iret https://wiki.osdev.org/Getting_to_Ring_3
-
-	// set up the stack frame iret expects
-	mov %rsp, %rax
-    // user data selector
-	push $((4 * 16) | 3)
-    // current rsp
-	push %rax
-    // push eflags
-	pushf
-    // push code selector (ring 3 code with bottom 2 bits set for ring 3)
-	push $((3 * 16) | 3)
-    // push instruction address to return to
-    lea [test_function], %rax
-	push %rax
-
-	iretq
-
 _transition_to_long_mode:
     xor %rax, %rax
     mov %rax, %ss
-- 
cgit v1.2.3