From 50f949d994c33ab23d63bdb9e8a438560ab0b4c4 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sat, 30 Nov 2019 21:07:22 +0100
Subject: Working userspace!

---
 src/kernel/interrupts/idt.asm | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'src/kernel/interrupts/idt.asm')

diff --git a/src/kernel/interrupts/idt.asm b/src/kernel/interrupts/idt.asm
index 90eab47..f30ead1 100644
--- a/src/kernel/interrupts/idt.asm
+++ b/src/kernel/interrupts/idt.asm
@@ -4,3 +4,38 @@ extern idtp
 idt_load:
     lidt [idtp]
     ret
+
+global idt_syscall
+extern syscall_handler
+idt_syscall:
+    push ds
+    push es
+    push fs
+    push gs
+    pushad
+
+    push ecx
+    push edx
+    push esi
+    push edi
+    push eax
+
+    mov ax, 0x10
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+
+    call syscall_handler
+
+    lea ebx, [5 * 4]
+    add esp, ebx
+
+    mov dword [esp + (7*4)], eax
+
+    popad
+    pop gs
+    pop fs
+    pop es
+    pop ds
+    iret
-- 
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