diff --git a/lib/romlib/genvar.sh b/lib/romlib/genvar.sh
new file mode 100755
index 0000000..a3e2cdf
--- /dev/null
+++ b/lib/romlib/genvar.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+set -e
+
+output=jmpvar.s
+for i
+do
+	case $i in
+	-o)
+		output=$2
+		shift 2
+		;;
+	--)
+		shift
+		break
+		;;
+	-*)
+		echo usage: genvar.sh [-o output] file... >&2
+		;;
+	esac
+done
+
+tmp=`mktemp`
+trap "rm -f $tmp" EXIT INT QUIT
+
+nm -a "$@" |
+awk -v OFS="\n" '
+$3 == ".text" {print "\t.data",
+                     "\t.globl\tjmptbl",
+                     "\t.align\t4",
+                     "jmptbl:\t.quad\t0x" $1}' > $tmp
+
+mv $tmp $output