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diff --git a/qemu/dtc/tests/mangle-layout.c b/qemu/dtc/tests/mangle-layout.c
new file mode 100644
index 000000000..a76e51e31
--- /dev/null
+++ b/qemu/dtc/tests/mangle-layout.c
@@ -0,0 +1,164 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ *	Testcase/tool for rearranging blocks of a dtb
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <stdint.h>
+
+#include <libfdt.h>
+
+#include "tests.h"
+#include "testdata.h"
+
+struct bufstate {
+	char *buf;
+	int size;
+};
+
+static void expand_buf(struct bufstate *buf, int newsize)
+{
+	buf->buf = realloc(buf->buf, newsize);
+	if (!buf->buf)
+		CONFIG("Allocation failure");
+	buf->size = newsize;
+}
+
+static void new_header(struct bufstate *buf, int version, const void *fdt)
+{
+	int hdrsize;
+
+	if (version == 16)
+		hdrsize = FDT_V16_SIZE;
+	else if (version == 17)
+		hdrsize = FDT_V17_SIZE;
+	else
+		CONFIG("Bad version %d", version);
+
+	expand_buf(buf, hdrsize);
+	memset(buf->buf, 0, hdrsize);
+
+	fdt_set_magic(buf->buf, FDT_MAGIC);
+	fdt_set_version(buf->buf, version);
+	fdt_set_last_comp_version(buf->buf, 16);
+	fdt_set_boot_cpuid_phys(buf->buf, fdt_boot_cpuid_phys(fdt));
+}
+
+static void add_block(struct bufstate *buf, int version, char block, const void *fdt)
+{
+	int align, size, oldsize;
+	const void *src;
+	int offset;
+
+	switch (block) {
+	case 'm':
+		/* Memory reserve map */
+		align = 8;
+		src = (const char *)fdt + fdt_off_mem_rsvmap(fdt);
+		size = (fdt_num_mem_rsv(fdt) + 1)
+			* sizeof(struct fdt_reserve_entry);
+		break;
+
+	case 't':
+		/* Structure block */
+		align = 4;
+		src = (const char *)fdt + fdt_off_dt_struct(fdt);
+		size = fdt_size_dt_struct(fdt);
+		break;
+
+	case 's':
+		/* Strings block */
+		align = 1;
+		src = (const char *)fdt + fdt_off_dt_strings(fdt);
+		size = fdt_size_dt_strings(fdt);
+		break;
+	default:
+		CONFIG("Bad block '%c'", block);
+	}
+
+	oldsize = buf->size;
+	offset = ALIGN(oldsize, align);
+	expand_buf(buf, offset+size);
+	memset(buf->buf + oldsize, 0, offset - oldsize);
+
+	memcpy(buf->buf + offset, src, size);
+
+	switch (block) {
+	case 'm':
+		fdt_set_off_mem_rsvmap(buf->buf, offset);
+		break;
+
+	case 't':
+		fdt_set_off_dt_struct(buf->buf, offset);
+		if (version >= 17)
+			fdt_set_size_dt_struct(buf->buf, size);
+		break;
+
+	case 's':
+		fdt_set_off_dt_strings(buf->buf, offset);
+		fdt_set_size_dt_strings(buf->buf, size);
+		break;
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	void *fdt;
+	int version;
+	const char *blockorder;
+	struct bufstate buf = {NULL, 0};
+	int err;
+	const char *inname;
+	char outname[PATH_MAX];
+
+	test_init(argc, argv);
+	if (argc != 4)
+		CONFIG("Usage: %s <dtb file> <version> <block order>", argv[0]);
+
+	inname = argv[1];
+	fdt = load_blob(argv[1]);
+	version = atoi(argv[2]);
+	blockorder = argv[3];
+	sprintf(outname, "v%d.%s.%s", version, blockorder, inname);
+
+	if ((version != 16) && (version != 17))
+		CONFIG("Version must be 16 or 17");
+
+	if (fdt_version(fdt) < 17)
+		CONFIG("Input tree must be v17");
+
+	new_header(&buf, version, fdt);
+
+	while (*blockorder) {
+		add_block(&buf, version, *blockorder, fdt);
+		blockorder++;
+	}
+
+	fdt_set_totalsize(buf.buf, buf.size);
+
+	err = fdt_check_header(buf.buf);
+	if (err)
+		FAIL("Output tree fails check: %s", fdt_strerror(err));
+
+	save_blob(outname, buf.buf);
+
+	PASS();
+}