From 2fb3f208bd2e739a8968afb23d22e13b6660ca22 Mon Sep 17 00:00:00 2001
From: Ada Christine <adachristine18@gmail.com>
Date: Fri, 31 Jan 2025 00:48:54 +0000
Subject: spread around defs, x86 asm and bits libs

---
 boot/fake_syscall_entry.S | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

(limited to 'boot/fake_syscall_entry.S')

diff --git a/boot/fake_syscall_entry.S b/boot/fake_syscall_entry.S
index ff2428d..bc175c1 100644
--- a/boot/fake_syscall_entry.S
+++ b/boot/fake_syscall_entry.S
@@ -1,18 +1,27 @@
 .section .text
 
+.global fake_syscall_entry
+.global fake_syscall_return
+
 .extern fake_syscall_handler
 
-.global fake_syscall_entry
 fake_syscall_entry:
-	hlt
+	hlt;
 
-.global fake_syscall_return 
 fake_syscall_return:
 	cli
+fake_syscall_swap:
+	mov %cs, %rax
+	pushq %rax
+	pushq %rdx
+	mov %ds, %rax
+	pushq %rax
+	sub $16, %rsp
+	sgdt (%rsp)
+	mov %rsp, (%rsi)
 	mov %rdi, %rsp
 	lgdt (%rsp)
 	add $16, %rsp
-
 	movw (%rsp), %ds
 	movw (%rsp), %es
 	movw (%rsp), %fs
-- 
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