Bug 751585: Don't enforce ASLR for binary components on XP, because system DLLs don't have ASLR and trigger false positives. r=bsmedberg,ehsan

toolkit/xre/nsWindowsDllBlocklist.cpp

@@ -191,6 +191,18 @@ private:
   void* mRealView;
 };
 
+bool
+IsVistaOrLater()
+{
+  OSVERSIONINFO info;
+
+  ZeroMemory(&info, sizeof(OSVERSIONINFO));
+  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+  GetVersionEx(&info);
+
+  return info.dwMajorVersion >= 6;
+}
+
 bool
 CheckASLR(const wchar_t* path)
 {
@@ -454,7 +466,7 @@ continue_loading:
       return STATUS_DLL_NOT_FOUND;
     }
 
-    if (!CheckASLR(full_fname)) {
+    if (IsVistaOrLater() && !CheckASLR(full_fname)) {
       printf_stderr("LdrLoadDll: Blocking load of '%s'.  XPCOM components must support ASLR.\n", dllName);
       return STATUS_DLL_NOT_FOUND;
     }