diff --git a/tools/versioner/platforms/crtbegin.map.txt b/tools/versioner/platforms/crtbegin.map.txt
new file mode 100644
index 0000000..2c08da6
--- /dev/null
+++ b/tools/versioner/platforms/crtbegin.map.txt
@@ -0,0 +1,7 @@
+# This file lists the libc functions are included in `crtbegin.o` and not
+# exported by `libc.so`.
+
+CRTBEGIN {
+  global:
+    atexit;  # arm64 x86 x86_64 mips mips64
+};
diff --git a/tools/versioner/platforms/libc.map.txt b/tools/versioner/platforms/libc.map.txt
new file mode 120000
index 0000000..8527b2e
--- /dev/null
+++ b/tools/versioner/platforms/libc.map.txt
@@ -0,0 +1 @@
+../../../libc/libc.map.txt
\ No newline at end of file