started reviving my fool os

1 files changed, 29 insertions, 0 deletions

diff --git a/userspace/crt0.S b/userspace/crt0.S
new file mode 100644
index 0000000..4c08f89
--- /dev/null
+++ b/userspace/crt0.S
@@ -0,0 +1,29 @@
+.global _start
+
+_start:
+
+pop %eax
+mov %eax, environ
+
+pop %eax
+#mov %eax, _impure_ptr
+
+#mov $61, %eax # write syscall
+#mov $1,%edx    # stdout
+#mov .hellostr,%ecx 
+#mov 9,%ebx       # string length
+#int $0x80
+
+call main
+
+push environ
+push %eax
+call _exit2
+
+# this should never be reached anyway!
+.wait:
+    hlt
+jmp .wait
+
+.hellostr:
+.ascii "Hello Ass"