From 3a41ecabd4a351753a379d6754031b0cf4cf6bca Mon Sep 17 00:00:00 2001
From: Dave Jones <dave.jones@canonical.com>
Date: Mon, 19 Oct 2020 10:51:18 +0100
Subject: [PATCH] Use aligned access for _sha3 module on ARM.

Gbp-Pq: Name arm-alignment.diff
---
 Modules/_sha3/sha3module.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Modules/_sha3/sha3module.c b/Modules/_sha3/sha3module.c
index c826b42..392ae53 100644
--- a/Modules/_sha3/sha3module.c
+++ b/Modules/_sha3/sha3module.c
@@ -64,6 +64,12 @@
 #define PLATFORM_BYTE_ORDER IS_BIG_ENDIAN
 #endif
 
+/* Bus error on 32-bit ARM due to un-aligned memory accesses; 64-bit ARM
+ * doesn't complain but un-aligned memory accesses are sub-optimal */
+#if defined(__arm__) || defined(__aarch64__)
+#define NO_MISALIGNED_ACCESSES 1
+#endif
+
 /* mangle names */
 #define KeccakF1600_FastLoop_Absorb _PySHA3_KeccakF1600_FastLoop_Absorb
 #define Keccak_HashFinal _PySHA3_Keccak_HashFinal
-- 
2.30.2