From 32c6ed4e358652ac64972541740eb0e34bf58690 Mon Sep 17 00:00:00 2001
From: Gwilym Inzani <email@gwilym.dev>
Date: Tue, 4 Jun 2024 21:39:58 +0100
Subject: [PATCH] Ensure the frame pointer is always 0

---
 agb/src/entrypoint.s | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/agb/src/entrypoint.s b/agb/src/entrypoint.s
index 45ebe74d..9f2ea49a 100644
--- a/agb/src/entrypoint.s
+++ b/agb/src/entrypoint.s
@@ -80,8 +80,12 @@ CommonInit:
     ldr r0, =0
     mov r1, r0
 
+    @ ensure the frame pointer is zero so that stack traces are guaranteed to terminate
+    mov r7, r0
+
     @ load main and branch
     ldr r2, =main
+    mov lr, pc
     bx  r2
 
     @ loop if we end up here