diff --git a/src/util/functions.c b/src/util/functions.c
new file mode 100644
index 0000000..ac189bd
--- /dev/null
+++ b/src/util/functions.c
@@ -0,0 +1,14 @@
+#include "functions.h"
+#include <stddef.h>
+
+void* ax__reverse_list(void* l)
+{
+    void* next;
+    void* rev = NULL;
+    for (void** list = l; list != NULL; list = next) {
+        next = *list;
+        *list = rev;
+        rev = list;
+    }
+    return rev;
+}
diff --git a/src/util/functions.h b/src/util/functions.h
new file mode 100644
index 0000000..a48f374
--- /dev/null
+++ b/src/util/functions.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void* ax__reverse_list(void* list);