From 8bf63bfb5d6a96979671002bfa8d2a715212d993 Mon Sep 17 00:00:00 2001
From: Paul Pan <i@0x7f.app>
Date: Mon, 17 Jun 2024 00:43:42 +0800
Subject: [PATCH] fix: root: pass a valid cptr

---
 root/root.S | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/root/root.S b/root/root.S
index 095fa72..452adef 100644
--- a/root/root.S
+++ b/root/root.S
@@ -10,8 +10,11 @@ _start:
 	la	t0, msg
 .loop:
 	lb	a2, 0(t0)
-	beqz	a2, _start	# print forever
-	syscall (1<<12 | 1), 1	# see uapi/syscall.rs
+	beqz	a2, _start
+	# see uapi/syscall.rs
+	# msg: label = DebugPutChar, length = 3
+	# ptr: self-referential to cspace, just to create a valid cptr
+	syscall (1<<12 | 3), 0x0202020202020202
 	addi	t0, t0, 1
 	j	.loop