fdt: Sync up to the latest libfdt
Bring over the fdt from this commit:
430419c (origin/master) tests: fix some python warnings
adding in the 'assumptions' series designed to reduce code size.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/scripts/dtc/libfdt/fdt_overlay.c b/scripts/dtc/libfdt/fdt_overlay.c
index bf75388..be71873 100644
--- a/scripts/dtc/libfdt/fdt_overlay.c
+++ b/scripts/dtc/libfdt/fdt_overlay.c
@@ -1,53 +1,8 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
/*
* libfdt - Flat Device Tree manipulation
* Copyright (C) 2016 Free Electrons
* Copyright (C) 2016 NextThing Co.
- *
- * libfdt is dual licensed: you can use it either under the terms of
- * the GPL, or the BSD license, at your option.
- *
- * a) This library 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 2 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 General Public License for more details.
- *
- * You should have received a copy of the GNU 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
- *
- * Alternatively,
- *
- * b) Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * 1. Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the following
- * disclaimer.
- * 2. Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "libfdt_env.h"
@@ -93,11 +48,11 @@
* @pathp: pointer which receives the path of the target (or NULL)
*
* overlay_get_target() retrieves the target offset in the base
- * device tree of a fragment, no matter how the actual targetting is
+ * device tree of a fragment, no matter how the actual targeting is
* done (through a phandle or a path)
*
* returns:
- * the targetted node offset in the base device tree
+ * the targeted node offset in the base device tree
* Negative error code on error
*/
static int overlay_get_target(const void *fdt, const void *fdto,
@@ -697,7 +652,7 @@
int len = 0, namelen;
const char *name;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
for (;;) {
name = fdt_get_name(fdt, nodeoffset, &namelen);
@@ -778,26 +733,36 @@
/* keep end marker to avoid strlen() */
e = path + path_len;
- /* format: /<fragment-name>/__overlay__/<relative-subnode-path> */
-
if (*path != '/')
return -FDT_ERR_BADVALUE;
/* get fragment name first */
s = strchr(path + 1, '/');
- if (!s)
- return -FDT_ERR_BADOVERLAY;
+ if (!s) {
+ /* Symbol refers to something that won't end
+ * up in the target tree */
+ continue;
+ }
frag_name = path + 1;
frag_name_len = s - path - 1;
/* verify format; safe since "s" lies in \0 terminated prop */
len = sizeof("/__overlay__/") - 1;
- if ((e - s) < len || memcmp(s, "/__overlay__/", len))
- return -FDT_ERR_BADOVERLAY;
-
- rel_path = s + len;
- rel_path_len = e - rel_path;
+ if ((e - s) > len && (memcmp(s, "/__overlay__/", len) == 0)) {
+ /* /<fragment-name>/__overlay__/<relative-subnode-path> */
+ rel_path = s + len;
+ rel_path_len = e - rel_path;
+ } else if ((e - s) == len
+ && (memcmp(s, "/__overlay__", len - 1) == 0)) {
+ /* /<fragment-name>/__overlay__ */
+ rel_path = "";
+ rel_path_len = 0;
+ } else {
+ /* Symbol refers to something that won't end
+ * up in the target tree */
+ continue;
+ }
/* find the fragment index in which the symbol lies */
ret = fdt_subnode_offset_namelen(fdto, 0, frag_name,
@@ -863,11 +828,15 @@
int fdt_overlay_apply(void *fdt, void *fdto)
{
- uint32_t delta = fdt_get_max_phandle(fdt);
+ uint32_t delta;
int ret;
- FDT_CHECK_HEADER(fdt);
- FDT_CHECK_HEADER(fdto);
+ FDT_RO_PROBE(fdt);
+ FDT_RO_PROBE(fdto);
+
+ ret = fdt_find_max_phandle(fdt, &delta);
+ if (ret)
+ goto err;
ret = overlay_adjust_local_phandles(fdto, delta);
if (ret)