From 0cc2b0fc9f12e222d4da00926e14c90c0bf891b3 Mon Sep 17 00:00:00 2001
From: DrChat <arkolbed@gmail.com>
Date: Wed, 14 Feb 2018 21:58:05 -0600
Subject: [PATCH] [Core] Protect the last 64kb of memory

---
 src/xenia/memory.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/xenia/memory.cc b/src/xenia/memory.cc
index 5461f027a..87f135682 100644
--- a/src/xenia/memory.cc
+++ b/src/xenia/memory.cc
@@ -171,12 +171,14 @@ bool Memory::Initialize() {
   heaps_.vE0000000.Initialize(virtual_membase_, 0xE0000000, 0x1FD00000, 4096,
                               &heaps_.physical);
 
-  // Protect the first 64kb of memory.
+  // Protect the first and last 64kb of memory.
   heaps_.v00000000.AllocFixed(
-      0x00000000, 64 * 1024, 64 * 1024,
+      0x00000000, 0x10000, 0x10000,
       kMemoryAllocationReserve | kMemoryAllocationCommit,
       !FLAGS_protect_zero ? kMemoryProtectRead | kMemoryProtectWrite
                           : kMemoryProtectNoAccess);
+  heaps_.physical.AllocFixed(0x1FFF0000, 0x10000, 0x10000,
+                             kMemoryAllocationReserve, kMemoryProtectNoAccess);
 
   // GPU writeback.
   // 0xC... is physical, 0x7F... is virtual. We may need to overlay these.