Author: kevans
Date: Sat Feb 3 01:18:19 2018
New Revision: 328824
URL: https://svnweb.freebsd.org/changeset/base/328824
Log:
MFC r328491: MFV r328490: Update libfdt to github:f1879e1
Pulls in a patch, now upstreamed, from nwhitehorn to add limited read-only
support for older (v2 and v3) FDT blobs.
Modified:
stable/11/sys/contrib/libfdt/fdt.c
stable/11/sys/contrib/libfdt/fdt_overlay.c
stable/11/sys/contrib/libfdt/fdt_ro.c
stable/11/sys/contrib/libfdt/libfdt.h
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/contrib/libfdt/fdt.c
==============================================================================
--- stable/11/sys/contrib/libfdt/fdt.c Sat Feb 3 00:59:08 2018
(r328823)
+++ stable/11/sys/contrib/libfdt/fdt.c Sat Feb 3 01:18:19 2018
(r328824)
@@ -123,6 +123,9 @@ uint32_t fdt_next_tag(const void *fdt, int startoffset
/* skip-name offset, length and value */
offset += sizeof(struct fdt_property) - FDT_TAGSIZE
+ fdt32_to_cpu(*lenp);
+ if (fdt_version(fdt) < 0x10 && fdt32_to_cpu(*lenp) >= 8 &&
+ ((offset - fdt32_to_cpu(*lenp)) % 8) != 0)
+ offset += 4;
break;
case FDT_END:
Modified: stable/11/sys/contrib/libfdt/fdt_overlay.c
==============================================================================
--- stable/11/sys/contrib/libfdt/fdt_overlay.c Sat Feb 3 00:59:08 2018
(r328823)
+++ stable/11/sys/contrib/libfdt/fdt_overlay.c Sat Feb 3 01:18:19 2018
(r328824)
@@ -1,3 +1,54 @@
+/*
+ * 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"
#include <fdt.h>
Modified: stable/11/sys/contrib/libfdt/fdt_ro.c
==============================================================================
--- stable/11/sys/contrib/libfdt/fdt_ro.c Sat Feb 3 00:59:08 2018
(r328823)
+++ stable/11/sys/contrib/libfdt/fdt_ro.c Sat Feb 3 01:18:19 2018
(r328824)
@@ -58,9 +58,10 @@
static int fdt_nodename_eq_(const void *fdt, int offset,
const char *s, int len)
{
- const char *p = fdt_offset_ptr(fdt, offset + FDT_TAGSIZE, len+1);
+ int olen;
+ const char *p = fdt_get_name(fdt, offset, &olen);
- if (!p)
+ if (!p || olen < len)
/* short match */
return 0;
@@ -233,16 +234,34 @@ int fdt_path_offset(const void *fdt, const char *path)
const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
{
const struct fdt_node_header *nh = fdt_offset_ptr_(fdt, nodeoffset);
+ const char *nameptr;
int err;
if (((err = fdt_check_header(fdt)) != 0)
|| ((err = fdt_check_node_offset_(fdt, nodeoffset)) < 0))
goto fail;
+ nameptr = nh->name;
+
+ if (fdt_version(fdt) < 0x10) {
+ /*
+ * For old FDT versions, match the naming conventions of V16:
+ * give only the leaf name (after all /). The actual tree
+ * contents are loosely checked.
+ */
+ const char *leaf;
+ leaf = strrchr(nameptr, '/');
+ if (leaf == NULL) {
+ err = -FDT_ERR_BADSTRUCTURE;
+ goto fail;
+ }
+ nameptr = leaf+1;
+ }
+
if (len)
- *len = strlen(nh->name);
+ *len = strlen(nameptr);
- return nh->name;
+ return nameptr;
fail:
if (len)
@@ -268,9 +287,9 @@ int fdt_next_property_offset(const void *fdt, int offs
return nextprop_(fdt, offset);
}
-const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
- int offset,
- int *lenp)
+static const struct fdt_property *fdt_get_property_by_offset_(const void *fdt,
+ int offset,
+ int *lenp)
{
int err;
const struct fdt_property *prop;
@@ -289,23 +308,44 @@ const struct fdt_property *fdt_get_property_by_offset(
return prop;
}
-const struct fdt_property *fdt_get_property_namelen(const void *fdt,
- int offset,
- const char *name,
- int namelen, int *lenp)
+const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
+ int offset,
+ int *lenp)
{
+ /* Prior to version 16, properties may need realignment
+ * and this API does not work. fdt_getprop_*() will, however. */
+
+ if (fdt_version(fdt) < 0x10) {
+ if (lenp)
+ *lenp = -FDT_ERR_BADVERSION;
+ return NULL;
+ }
+
+ return fdt_get_property_by_offset_(fdt, offset, lenp);
+}
+
+static const struct fdt_property *fdt_get_property_namelen_(const void *fdt,
+ int offset,
+ const char *name,
+ int namelen,
+ int *lenp,
+ int *poffset)
+{
for (offset = fdt_first_property_offset(fdt, offset);
(offset >= 0);
(offset = fdt_next_property_offset(fdt, offset))) {
const struct fdt_property *prop;
- if (!(prop = fdt_get_property_by_offset(fdt, offset, lenp))) {
+ if (!(prop = fdt_get_property_by_offset_(fdt, offset, lenp))) {
offset = -FDT_ERR_INTERNAL;
break;
}
if (fdt_string_eq_(fdt, fdt32_to_cpu(prop->nameoff),
- name, namelen))
+ name, namelen)) {
+ if (poffset)
+ *poffset = offset;
return prop;
+ }
}
if (lenp)
@@ -313,6 +353,25 @@ const struct fdt_property *fdt_get_property_namelen(co
return NULL;
}
+
+const struct fdt_property *fdt_get_property_namelen(const void *fdt,
+ int offset,
+ const char *name,
+ int namelen, int *lenp)
+{
+ /* Prior to version 16, properties may need realignment
+ * and this API does not work. fdt_getprop_*() will, however. */
+ if (fdt_version(fdt) < 0x10) {
+ if (lenp)
+ *lenp = -FDT_ERR_BADVERSION;
+ return NULL;
+ }
+
+ return fdt_get_property_namelen_(fdt, offset, name, namelen, lenp,
+ NULL);
+}
+
+
const struct fdt_property *fdt_get_property(const void *fdt,
int nodeoffset,
const char *name, int *lenp)
@@ -324,12 +383,18 @@ const struct fdt_property *fdt_get_property(const void
const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
const char *name, int namelen, int *lenp)
{
+ int poffset;
const struct fdt_property *prop;
- prop = fdt_get_property_namelen(fdt, nodeoffset, name, namelen, lenp);
+ prop = fdt_get_property_namelen_(fdt, nodeoffset, name, namelen, lenp,
+ &poffset);
if (!prop)
return NULL;
+ /* Handle realignment */
+ if (fdt_version(fdt) < 0x10 && (poffset + sizeof(*prop)) % 8 &&
+ fdt32_to_cpu(prop->len) >= 8)
+ return prop->data + 4;
return prop->data;
}
@@ -338,11 +403,16 @@ const void *fdt_getprop_by_offset(const void *fdt, int
{
const struct fdt_property *prop;
- prop = fdt_get_property_by_offset(fdt, offset, lenp);
+ prop = fdt_get_property_by_offset_(fdt, offset, lenp);
if (!prop)
return NULL;
if (namep)
*namep = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
+
+ /* Handle realignment */
+ if (fdt_version(fdt) < 0x10 && (offset + sizeof(*prop)) % 8 &&
+ fdt32_to_cpu(prop->len) >= 8)
+ return prop->data + 4;
return prop->data;
}
Modified: stable/11/sys/contrib/libfdt/libfdt.h
==============================================================================
--- stable/11/sys/contrib/libfdt/libfdt.h Sat Feb 3 00:59:08 2018
(r328823)
+++ stable/11/sys/contrib/libfdt/libfdt.h Sat Feb 3 01:18:19 2018
(r328824)
@@ -54,7 +54,7 @@
#include <libfdt_env.h>
#include <fdt.h>
-#define FDT_FIRST_SUPPORTED_VERSION 0x10
+#define FDT_FIRST_SUPPORTED_VERSION 0x02
#define FDT_LAST_SUPPORTED_VERSION 0x11
/* Error codes: informative error codes */
@@ -526,6 +526,9 @@ int fdt_next_property_offset(const void *fdt, int offs
* fdt_property structure within the device tree blob at the given
* offset. If lenp is non-NULL, the length of the property value is
* also returned, in the integer pointed to by lenp.
+ *
+ * Note that this code only works on device tree versions >= 16. fdt_getprop()
+ * works on all versions.
*
* returns:
* pointer to the structure representing the property
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