From 633d6abbec381a6b42b7a2c560384de8488fb8d2 Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Sat, 25 Jan 2025 08:55:08 +1100
Subject: [PATCH] DS: Try to fix crash when generating 64x64x64 world

---
 src/Platform_NDS.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Platform_NDS.c b/src/Platform_NDS.c
index b78628377..feca34e2d 100644
--- a/src/Platform_NDS.c
+++ b/src/Platform_NDS.c
@@ -585,6 +585,14 @@ void Platform_Init(void) {
 	Platform_Log1("Running in %c mode with NDS wifi", dsiMode ? "DSi" : "DS");
 #endif
 
+	// By default, the "heap limit" is calculated in `sbrk` based on current
+	//  stack pointer value - however this does not reliably in ClassiCube's 
+	//  case as e.g. map gen and bitmap decoding use much more stack space
+	// So to avoid having the stack overlapping the heap when more stack space
+	//  is used, manually reduce the heap limit by 32 kb
+	extern char* fake_heap_end;
+	fake_heap_end -= 32768;
+
 	InitFilesystem();
     InitNetworking();
 	cpuStartTiming(1);