test: add minimal module for verification testing

[firefly-linux-kernel-4.4.55.git] / lib / test_module.c

diff --git a/lib/test_module.c b/lib/test_module.c
new file mode 100644 (file)
index 0000000..319b66f
--- /dev/null
+++ b/lib/test_module.c
@@ -0,0 +1,33 @@
+/*
+ * This module emits "Hello, world" on printk when loaded.
+ *
+ * It is designed to be used for basic evaluation of the module loading
+ * subsystem (for example when validating module signing/verification). It
+ * lacks any extra dependencies, and will not normally be loaded by the
+ * system unless explicitly requested by name.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+
+static int __init test_module_init(void)
+{
+       pr_warn("Hello, world\n");
+
+       return 0;
+}
+
+module_init(test_module_init);
+
+static void __exit test_module_exit(void)
+{
+       pr_warn("Goodbye\n");
+}
+
+module_exit(test_module_exit);
+
+MODULE_AUTHOR("Kees Cook <keescook@chromium.org>");
+MODULE_LICENSE("GPL");