Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c
index dfb3236..6fd9ec1 100644
--- a/scripts/dtc/libfdt/fdt_ro.c
+++ b/scripts/dtc/libfdt/fdt_ro.c
@@ -1,52 +1,7 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
/*
* libfdt - Flat Device Tree manipulation
* Copyright (C) 2006 David Gibson, IBM Corporation.
- *
- * 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"
@@ -76,60 +31,156 @@
return 0;
}
+const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
+{
+ uint32_t absoffset = stroffset + fdt_off_dt_strings(fdt);
+ size_t len;
+ int err;
+ const char *s, *n;
+
+ err = fdt_ro_probe_(fdt);
+ if (err != 0)
+ goto fail;
+
+ err = -FDT_ERR_BADOFFSET;
+ if (absoffset >= fdt_totalsize(fdt))
+ goto fail;
+ len = fdt_totalsize(fdt) - absoffset;
+
+ if (fdt_magic(fdt) == FDT_MAGIC) {
+ if (stroffset < 0)
+ goto fail;
+ if (fdt_version(fdt) >= 17) {
+ if (stroffset >= fdt_size_dt_strings(fdt))
+ goto fail;
+ if ((fdt_size_dt_strings(fdt) - stroffset) < len)
+ len = fdt_size_dt_strings(fdt) - stroffset;
+ }
+ } else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
+ if ((stroffset >= 0)
+ || (stroffset < -fdt_size_dt_strings(fdt)))
+ goto fail;
+ if ((-stroffset) < len)
+ len = -stroffset;
+ } else {
+ err = -FDT_ERR_INTERNAL;
+ goto fail;
+ }
+
+ s = (const char *)fdt + absoffset;
+ n = memchr(s, '\0', len);
+ if (!n) {
+ /* missing terminating NULL */
+ err = -FDT_ERR_TRUNCATED;
+ goto fail;
+ }
+
+ if (lenp)
+ *lenp = n - s;
+ return s;
+
+fail:
+ if (lenp)
+ *lenp = err;
+ return NULL;
+}
+
const char *fdt_string(const void *fdt, int stroffset)
{
- return (const char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
+ return fdt_get_string(fdt, stroffset, NULL);
}
static int fdt_string_eq_(const void *fdt, int stroffset,
const char *s, int len)
{
- const char *p = fdt_string(fdt, stroffset);
+ int slen;
+ const char *p = fdt_get_string(fdt, stroffset, &slen);
- return (strlen(p) == len) && (memcmp(p, s, len) == 0);
+ return p && (slen == len) && (memcmp(p, s, len) == 0);
}
-uint32_t fdt_get_max_phandle(const void *fdt)
+int fdt_find_max_phandle(const void *fdt, uint32_t *phandle)
{
- uint32_t max_phandle = 0;
- int offset;
+ uint32_t max = 0;
+ int offset = -1;
- for (offset = fdt_next_node(fdt, -1, NULL);;
- offset = fdt_next_node(fdt, offset, NULL)) {
- uint32_t phandle;
+ while (true) {
+ uint32_t value;
- if (offset == -FDT_ERR_NOTFOUND)
- return max_phandle;
+ offset = fdt_next_node(fdt, offset, NULL);
+ if (offset < 0) {
+ if (offset == -FDT_ERR_NOTFOUND)
+ break;
- if (offset < 0)
- return (uint32_t)-1;
+ return offset;
+ }
- phandle = fdt_get_phandle(fdt, offset);
- if (phandle == (uint32_t)-1)
- continue;
+ value = fdt_get_phandle(fdt, offset);
- if (phandle > max_phandle)
- max_phandle = phandle;
+ if (value > max)
+ max = value;
}
+ if (phandle)
+ *phandle = max;
+
return 0;
}
+int fdt_generate_phandle(const void *fdt, uint32_t *phandle)
+{
+ uint32_t max;
+ int err;
+
+ err = fdt_find_max_phandle(fdt, &max);
+ if (err < 0)
+ return err;
+
+ if (max == FDT_MAX_PHANDLE)
+ return -FDT_ERR_NOPHANDLES;
+
+ if (phandle)
+ *phandle = max + 1;
+
+ return 0;
+}
+
+static const struct fdt_reserve_entry *fdt_mem_rsv(const void *fdt, int n)
+{
+ int offset = n * sizeof(struct fdt_reserve_entry);
+ int absoffset = fdt_off_mem_rsvmap(fdt) + offset;
+
+ if (absoffset < fdt_off_mem_rsvmap(fdt))
+ return NULL;
+ if (absoffset > fdt_totalsize(fdt) - sizeof(struct fdt_reserve_entry))
+ return NULL;
+ return fdt_mem_rsv_(fdt, n);
+}
+
int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size)
{
- FDT_CHECK_HEADER(fdt);
- *address = fdt64_to_cpu(fdt_mem_rsv_(fdt, n)->address);
- *size = fdt64_to_cpu(fdt_mem_rsv_(fdt, n)->size);
+ const struct fdt_reserve_entry *re;
+
+ FDT_RO_PROBE(fdt);
+ re = fdt_mem_rsv(fdt, n);
+ if (!re)
+ return -FDT_ERR_BADOFFSET;
+
+ *address = fdt64_ld(&re->address);
+ *size = fdt64_ld(&re->size);
return 0;
}
int fdt_num_mem_rsv(const void *fdt)
{
- int i = 0;
+ int i;
+ const struct fdt_reserve_entry *re;
- while (fdt64_to_cpu(fdt_mem_rsv_(fdt, i)->size) != 0)
- i++;
- return i;
+ for (i = 0; (re = fdt_mem_rsv(fdt, i)) != NULL; i++) {
+ if (fdt64_ld(&re->size) == 0)
+ return i;
+ }
+ return -FDT_ERR_TRUNCATED;
}
static int nextprop_(const void *fdt, int offset)
@@ -161,7 +212,7 @@
{
int depth;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
for (depth = 0;
(offset >= 0) && (depth >= 0);
@@ -187,7 +238,7 @@
const char *p = path;
int offset = 0;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
/* see if we have an alias */
if (*path != '/') {
@@ -237,7 +288,7 @@
const char *nameptr;
int err;
- if (((err = fdt_check_header(fdt)) != 0)
+ if (((err = fdt_ro_probe_(fdt)) != 0)
|| ((err = fdt_check_node_offset_(fdt, nodeoffset)) < 0))
goto fail;
@@ -303,7 +354,7 @@
prop = fdt_offset_ptr_(fdt, offset);
if (lenp)
- *lenp = fdt32_to_cpu(prop->len);
+ *lenp = fdt32_ld(&prop->len);
return prop;
}
@@ -340,7 +391,7 @@
offset = -FDT_ERR_INTERNAL;
break;
}
- if (fdt_string_eq_(fdt, fdt32_to_cpu(prop->nameoff),
+ if (fdt_string_eq_(fdt, fdt32_ld(&prop->nameoff),
name, namelen)) {
if (poffset)
*poffset = offset;
@@ -393,7 +444,7 @@
/* Handle realignment */
if (fdt_version(fdt) < 0x10 && (poffset + sizeof(*prop)) % 8 &&
- fdt32_to_cpu(prop->len) >= 8)
+ fdt32_ld(&prop->len) >= 8)
return prop->data + 4;
return prop->data;
}
@@ -406,12 +457,22 @@
prop = fdt_get_property_by_offset_(fdt, offset, lenp);
if (!prop)
return NULL;
- if (namep)
- *namep = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
+ if (namep) {
+ const char *name;
+ int namelen;
+ name = fdt_get_string(fdt, fdt32_ld(&prop->nameoff),
+ &namelen);
+ if (!name) {
+ if (lenp)
+ *lenp = namelen;
+ return NULL;
+ }
+ *namep = name;
+ }
/* Handle realignment */
if (fdt_version(fdt) < 0x10 && (offset + sizeof(*prop)) % 8 &&
- fdt32_to_cpu(prop->len) >= 8)
+ fdt32_ld(&prop->len) >= 8)
return prop->data + 4;
return prop->data;
}
@@ -436,7 +497,7 @@
return 0;
}
- return fdt32_to_cpu(*php);
+ return fdt32_ld(php);
}
const char *fdt_get_alias_namelen(const void *fdt,
@@ -462,7 +523,7 @@
int offset, depth, namelen;
const char *name;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
if (buflen < 2)
return -FDT_ERR_NOSPACE;
@@ -514,7 +575,7 @@
int offset, depth;
int supernodeoffset = -FDT_ERR_INTERNAL;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
if (supernodedepth < 0)
return -FDT_ERR_NOTFOUND;
@@ -573,7 +634,7 @@
const void *val;
int len;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
/* FIXME: The algorithm here is pretty horrible: we scan each
* property of a node in fdt_getprop(), then if that didn't
@@ -599,7 +660,7 @@
if ((phandle == 0) || (phandle == -1))
return -FDT_ERR_BADPHANDLE;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
/* FIXME: The algorithm here is pretty horrible: we
* potentially scan each property of a node in
@@ -752,7 +813,7 @@
{
int offset, err;
- FDT_CHECK_HEADER(fdt);
+ FDT_RO_PROBE(fdt);
/* FIXME: The algorithm here is pretty horrible: we scan each
* property of a node in fdt_node_check_compatible(), then if
@@ -771,3 +832,66 @@
return offset; /* error from fdt_next_node() */
}
+
+int fdt_check_full(const void *fdt, size_t bufsize)
+{
+ int err;
+ int num_memrsv;
+ int offset, nextoffset = 0;
+ uint32_t tag;
+ unsigned depth = 0;
+ const void *prop;
+ const char *propname;
+
+ if (bufsize < FDT_V1_SIZE)
+ return -FDT_ERR_TRUNCATED;
+ err = fdt_check_header(fdt);
+ if (err != 0)
+ return err;
+ if (bufsize < fdt_totalsize(fdt))
+ return -FDT_ERR_TRUNCATED;
+
+ num_memrsv = fdt_num_mem_rsv(fdt);
+ if (num_memrsv < 0)
+ return num_memrsv;
+
+ while (1) {
+ offset = nextoffset;
+ tag = fdt_next_tag(fdt, offset, &nextoffset);
+
+ if (nextoffset < 0)
+ return nextoffset;
+
+ switch (tag) {
+ case FDT_NOP:
+ break;
+
+ case FDT_END:
+ if (depth != 0)
+ return -FDT_ERR_BADSTRUCTURE;
+ return 0;
+
+ case FDT_BEGIN_NODE:
+ depth++;
+ if (depth > INT_MAX)
+ return -FDT_ERR_BADSTRUCTURE;
+ break;
+
+ case FDT_END_NODE:
+ if (depth == 0)
+ return -FDT_ERR_BADSTRUCTURE;
+ depth--;
+ break;
+
+ case FDT_PROP:
+ prop = fdt_getprop_by_offset(fdt, offset, &propname,
+ &err);
+ if (!prop)
+ return err;
+ break;
+
+ default:
+ return -FDT_ERR_INTERNAL;
+ }
+ }
+}