From 874ad93f4dba11722ccfb02aa7a3533777d8e03e Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Wed, 29 Mar 2017 18:46:36 -0700
Subject: [PATCH] GBA Memory: Fix copy-on-write for ROM when executing in ROM

---
 src/gba/memory.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gba/memory.c b/src/gba/memory.c
index 69cdc8b28..a6280254e 100644
--- a/src/gba/memory.c
+++ b/src/gba/memory.c
@@ -1552,6 +1552,9 @@ void _pristineCow(struct GBA* gba) {
 	void* newRom = anonymousMemoryMap(SIZE_CART0);
 	memcpy(newRom, gba->memory.rom, gba->memory.romSize);
 	memset(((uint8_t*) newRom) + gba->memory.romSize, 0xFF, SIZE_CART0 - gba->memory.romSize);
+	if (gba->cpu->memory.activeRegion == gba->memory.rom) {
+		gba->cpu->memory.activeRegion = newRom;
+	}
 	if (gba->romVf) {
 #ifndef _3DS
 		gba->romVf->unmap(gba->romVf, gba->memory.rom, gba->memory.romSize);