Index: src/Unwind-sjlj.c
===================================================================
--- src/Unwind-sjlj.c
+++ src/Unwind-sjlj.c
@@ -465,4 +465,18 @@
   return 0;
 }
 
+#if !defined(__APPLE__)
+static __thread struct _Unwind_FunctionContext *stack = NULL;
+
+_LIBUNWIND_HIDDEN
+struct _Unwind_FunctionContext *__Unwind_SjLj_GetTopOfFunctionStack() {
+  return stack;
+}
+
+_LIBUNWIND_HIDDEN
+void __Unwind_SjLj_SetTopOfFunctionStack(struct _Unwind_FunctionContext *fc) {
+  stack = fc;
+}
+#endif // !defined(__APPLE__)
+
 #endif // defined(_LIBUNWIND_BUILD_SJLJ_APIS)