Index: llvm/lib/ObjectYAML/ELFYAML.cpp
--- llvm/lib/ObjectYAML/ELFYAML.cpp.orig
+++ llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -174,6 +174,7 @@ void ScalarEnumerationTraits<ELFYAML::ELF_NT>::enumera
   ECase(NT_OPENBSD_FPREGS);
   ECase(NT_OPENBSD_XFPREGS);
   ECase(NT_OPENBSD_WCOOKIE);
+  ECase(NT_OPENBSD_PACMASK);
   // AMD specific notes. (Code Object V2)
   ECase(NT_AMD_HSA_CODE_OBJECT_VERSION);
   ECase(NT_AMD_HSA_HSAIL);
