1 files changed, 114 insertions, 0 deletions
diff --git a/dtc/tests/value-labels.c b/dtc/tests/value-labels.c
new file mode 100644
index 000000000..e3183574d
--- /dev/null
+++ b/dtc/tests/value-labels.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ * libfdt - Flat Device Tree manipulation
+ *	Test labels within values
+ * Copyright (C) 2008 David Gibson, IBM Corporation.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+
+#include <dlfcn.h>
+
+#include <libfdt.h>
+
+#include "tests.h"
+#include "testdata.h"
+
+struct val_label {
+	const char *labelname;
+	int propoff;
+};
+
+static struct val_label labels1[] = {
+	{ "start1", 0 },
+	{ "mid1", 2 },
+	{ "end1", -1 },
+};
+
+static struct val_label labels2[] = {
+	{ "start2", 0 },
+	{ "innerstart2", 0 },
+	{ "innermid2", 4 },
+	{ "innerend2", -1 },
+	{ "end2", -1 },
+};
+
+static struct val_label labels3[] = {
+	{ "start3", 0 },
+	{ "innerstart3", 0 },
+	{ "innermid3", 1 },
+	{ "innerend3", -1 },
+	{ "end3", -1 },
+};
+
+static void check_prop_labels(void *sohandle, void *fdt, const char *name,
+			      const struct val_label* labels, int n)
+{
+	const struct fdt_property *prop;
+	const char *p;
+	int len;
+	int i;
+
+	prop = fdt_get_property(fdt, 0, name, &len);
+	if (!prop)
+		FAIL("Couldn't locate property \"%s\"", name);
+
+	p = dlsym(sohandle, name);
+	if (!p)
+		FAIL("Couldn't locate label symbol \"%s\"", name);
+
+	if (p != (const char *)prop)
+		FAIL("Label \"%s\" does not point to correct property", name);
+
+	for (i = 0; i < n; i++) {
+		int off = labels[i].propoff;
+
+		if (off == -1)
+			off = len;
+
+		p = dlsym(sohandle, labels[i].labelname);
+		if (!p)
+			FAIL("Couldn't locate label symbol \"%s\"", name);
+
+		if ((p - prop->data) != off)
+			FAIL("Label \"%s\" points to offset %ld instead of %d"
+			     "in property \"%s\"", labels[i].labelname,
+			     (long)(p - prop->data), off, name);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	void *sohandle;
+	void *fdt;
+	int err;
+
+	test_init(argc, argv);
+	if (argc != 2)
+		CONFIG("Usage: %s <so file>", argv[0]);
+
+	sohandle = dlopen(argv[1], RTLD_NOW);
+	if (!sohandle)
+		FAIL("Couldn't dlopen() %s", argv[1]);
+
+	fdt = dlsym(sohandle, "dt_blob_start");
+	if (!fdt)
+		FAIL("Couldn't locate \"dt_blob_start\" symbol in %s",
+		     argv[1]);
+
+	err = fdt_check_header(fdt);
+	if (err != 0)
+		FAIL("%s contains invalid tree: %s", argv[1],
+		     fdt_strerror(err));
+
+
+	check_prop_labels(sohandle, fdt, "prop1", labels1, ARRAY_SIZE(labels1));
+	check_prop_labels(sohandle, fdt, "prop2", labels2, ARRAY_SIZE(labels2));
+	check_prop_labels(sohandle, fdt, "prop3", labels3, ARRAY_SIZE(labels3));
+
+	PASS();
+}