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diff --git a/src/core/loader.lua b/src/core/loader.lua
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+-- Copyright (c) 2018-2021, OARC, Inc.
+-- All rights reserved.
+--
+-- This file is part of dnsjit.
+--
+-- dnsjit is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- dnsjit is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with dnsjit.  If not, see <http://www.gnu.org/licenses/>.
+
+-- dnsjit.core.loader
+-- Dynamic library loader
+--   local loader = require("dnsjit.core.loader")
+--   loader.load("example-input-zero/zero")
+--
+-- Module for loading dynamic libraries (.so) in more ways then LuaJIT can.
+-- This is mainly used in external modules.
+module(...,package.seeall)
+
+require("dnsjit.core.file")
+local ffi = require("ffi")
+local C = ffi.C
+
+local Loader = {}
+
+-- Search
+-- .B package.cpath
+-- for the given name and load the first found.
+-- If
+-- .B global
+-- is true (default true if not given) then the loaded symbols will also
+-- be available globally.
+-- Returns the loaded C library as per
+-- .BR ffi.load() .
+-- .br
+-- The
+-- .B ?
+-- in each path of
+-- .B package.cpath
+-- will be replace by the given name, so usually the ".so" part of the
+-- library does not need to be given.
+-- See
+-- .I package.cpath
+-- and
+-- .I package.loaders
+-- in Lua 5.1 for more information.
+function Loader.load(name, global)
+    if global ~= false then
+        global = true
+    end
+    for path in string.gmatch(package.cpath, "[^;]+") do
+        path = path:gsub("?", name)
+        if C.core_file_exists(path) == 0 then
+            return ffi.load(path, global)
+        end
+    end
+    return ffi.load(name)
+end
+
+return Loader