From cc368de1a0cf148409cc4b55cf6e616114ebf76d Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Wed, 21 Feb 2018 20:03:56 +0000
Subject: memory: LOG_ERROR when falling off end of page table

---
 src/core/memory.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/core')

diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index cc1ed16b6..ce62666d7 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -118,6 +118,11 @@ boost::optional<T> ReadSpecial(VAddr addr);
 
 template <typename T>
 T Read(const VAddr vaddr) {
+    if ((vaddr >> PAGE_BITS) >= PAGE_TABLE_NUM_ENTRIES) {
+        LOG_ERROR(HW_Memory, "Read%lu after page table @ 0x%016" PRIX64, sizeof(T) * 8, vaddr);
+        return 0;
+    }
+
     const PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
     switch (type) {
     case PageType::Unmapped:
@@ -146,6 +151,12 @@ bool WriteSpecial(VAddr addr, const T data);
 
 template <typename T>
 void Write(const VAddr vaddr, const T data) {
+    if ((vaddr >> PAGE_BITS) >= PAGE_TABLE_NUM_ENTRIES) {
+        LOG_ERROR(HW_Memory, "Write%lu after page table 0x%08X @ 0x%016" PRIX64, sizeof(data) * 8,
+                  (u32)data, vaddr);
+        return;
+    }
+
     const PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
     switch (type) {
     case PageType::Unmapped:
-- 
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