From: Dave Jones <dave.jones@canonical.com>
Date: Sun, 10 Jan 2021 15:42:50 +0000 (+0000)
Subject: Use aligned access for _sha3 module on ARM.
X-Git-Tag: archive/raspbian/3.9.1-2+rpi1^2~4
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=45d5fe0550247bd6a4e8bf8dcbafa33b145df4a5;p=python3.9.git

Use aligned access for _sha3 module on ARM.


Gbp-Pq: Name arm-alignment.diff
---

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