From 1e5994b9268b2cbf9081f4af7655e9d99fc94fcb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 10 Jul 2018 16:14:38 +0200
Subject: [PATCH] [tree] Fix memove32

---
 poincare/src/tree_pool.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/poincare/src/tree_pool.cpp b/poincare/src/tree_pool.cpp
index a23188271..54838b660 100644
--- a/poincare/src/tree_pool.cpp
+++ b/poincare/src/tree_pool.cpp
@@ -23,7 +23,8 @@ TreeNode * TreePool::node(int identifier) const {
 }
 
 static void memmove32(uint32_t * dst, uint32_t * src, size_t len) {
-  if (dst > src) {
+  if (src < dst && dst < src + len) {
+    /* Copy backwards to avoid overwrites */
     src += len;
     dst += len;
     while (len--) {