From e9407b091b34d93014b89660601da62f13df37aa Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 1 Dec 2019 15:47:35 +0100
Subject: Semi-working C-based userspace syscalls

---
 src/userspace/start.asm | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 src/userspace/start.asm

(limited to 'src/userspace/start.asm')

diff --git a/src/userspace/start.asm b/src/userspace/start.asm
new file mode 100644
index 0000000..498f5f5
--- /dev/null
+++ b/src/userspace/start.asm
@@ -0,0 +1,22 @@
+bits 32
+section .start_section
+    dd _start
+
+section .text
+    global _start
+    extern user_main
+    _start:
+        mov esp, ebp
+        call user_main
+
+    global syscall
+    syscall:
+        mov eax, 1
+        lea edi, [ebp+welcome]
+        mov esi, welcome_sz
+        int 0x80
+        ret
+
+section .data
+        welcome db "Welcome to the userspace", 0x0A, 0x0A
+        welcome_sz equ $ - welcome
\ No newline at end of file
-- 
cgit v1.2.3