Implement architecture-specific user probe address retrieval

xtoskrnl/mm/i686/pagemap.cc

@@ -173,6 +173,21 @@ MM::PageMap::GetPteOffset(IN PVOID Address)
     return ((((ULONG_PTR)(Address)) >> MM_PTI_SHIFT) & (PageMapInfo.Xpa ? 0x1FF : 0x3FF));
 }
 
+/**
+ * Retrieves the maximum valid memory address accessible to user-mode applications.
+ *
+ * @return This routine returns the user-mode probe address boundary.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+ULONG_PTR
+MM::PageMap::GetUserProbeAddress(VOID)
+{
+    /* Return user probe address */
+    return MM_USER_PROBE_ADDRESS;
+}
+
 /**
  * Gets the status of Extended Paging Address (XPA) mode.
  *