[cc1352,cc26xx] fix unaligned access of ext address in radio.c (#4617)

This avoids misaligned memory access that was caused by the byte-aligned pointer being dereferenced as a uint64_t pointer.
2026-08-25 11:49:51 +00:00 · 2020-04-22 13:46:37 -07:00
parent 5632c271b8
commit c2f316fead
4 changed files with 83 additions and 12 deletions
@@ -0,0 +1,68 @@
+/*
+ *  Copyright (c) 2020, The OpenThread Authors.
+ *  All rights reserved.
+ *
+ *  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.
+ *  3. Neither the name of the copyright holder nor the
+ *     names of its contributors may be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ *  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 HOLDER 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.
+ */
+
+/**
+ * @file
+ *   This file includes macros for validating runtime conditions.
+ */
+
+#ifndef PLATFORM_UTILS_ENCODING_H
+#define PLATFORM_UTILS_ENCODING_H
+
+#include <stdint.h>
+
+/**
+ * Converts a 64-bit unsigned integer stored as a little-endian byte
+ * array to uint64_t.
+ *
+ * Allows for the array to be byte-aligned, so that loading the
+ * uint64_t value via this function avoids a processor exception due
+ * to unaligned access.
+ *
+ * @param[in]  aSource  The byte array.
+ *
+ * @returns The 64-bit value as a uint64_t.
+ *
+ */
+static inline uint64_t otEncodingReadUint64Le(const uint8_t *aSource)
+{
+    uint64_t value = 0;
+
+    value |= (uint64_t)aSource[0];
+    value |= ((uint64_t)aSource[1]) << 8;
+    value |= ((uint64_t)aSource[2]) << 16;
+    value |= ((uint64_t)aSource[3]) << 24;
+    value |= ((uint64_t)aSource[4]) << 32;
+    value |= ((uint64_t)aSource[5]) << 40;
+    value |= ((uint64_t)aSource[6]) << 48;
+    value |= ((uint64_t)aSource[7]) << 56;
+
+    return value;
+}
+
+#endif // PLATFORM_UTILS_ENCODING_H