From a8ff66c3a02e2121ca3c3900ba02704f8ec156eb Mon Sep 17 00:00:00 2001
From: Lua MacDougall <lua@foxgirl.dev>
Date: Sat, 16 Apr 2022 23:30:54 -0700
Subject: [PATCH] fox32: fix stack overflow when initializing memory

---
 src/memory.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/memory.rs b/src/memory.rs
index f645f94..80f624c 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -23,8 +23,10 @@ struct MemoryInner {
 impl MemoryInner {
     pub fn new(rom: &[u8]) -> Self {
         let mut this = Self {
-            ram: Box::new([0u8; MEMORY_RAM_SIZE]),
-            rom: Box::new([0u8; MEMORY_ROM_SIZE]),
+            // HACK: allocate directly on the heap to avoid a stack overflow
+            //       at runtime while trying to move around a 64MB array
+            ram: unsafe { Box::from_raw(Box::into_raw(vec![0u8; MEMORY_RAM_SIZE].into_boxed_slice()) as *mut MemoryRam) },
+            rom: unsafe { Box::from_raw(Box::into_raw(vec![0u8; MEMORY_ROM_SIZE].into_boxed_slice()) as *mut MemoryRom) },
         };
         this.rom.as_mut_slice().write(rom).expect("failed to copy ROM to memory");
         this
@@ -107,4 +109,4 @@ impl Memory {
         self.write_8(address + 2, ((word & 0x00FF0000) >> 16) as u8);
         self.write_8(address + 3, ((word & 0xFF000000) >> 24) as u8);
     }
-}
\ No newline at end of file
+}