diff --git a/src/arch/amd64/boot.S b/src/arch/amd64/boot.S
index 9771fe2..36e4bc6 100644
--- a/src/arch/amd64/boot.S
+++ b/src/arch/amd64/boot.S
@@ -116,7 +116,7 @@ start:
 	bits 64
 code64:
 	call amd64_shim
-	push rax
+	mov rdi, rax
 	call kmain
 	cli
 halt:
diff --git a/src/kmain.c b/src/kmain.c
index b9ceb77..381ceb9 100644
--- a/src/kmain.c
+++ b/src/kmain.c
@@ -1,7 +1,9 @@
-void kmain() {
+#include <lib.h>
+#include <serial.h>
+void kmain(void *info) {
+	char buf[20];
 	*(char*)0xB8000 = 'c';
 	*(char*)(0xB8002 + 0x20'0000) = 'd';
-	while(1) {
-		__asm("cli; hlt");
-	}
+	itoa((long)info, buf, 10);
+	serial_out_str(buf);
 }