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-rw-r--r--gnu/packages/patches/python-3-arm-alignment.patch21
1 files changed, 21 insertions, 0 deletions
diff --git a/gnu/packages/patches/python-3-arm-alignment.patch b/gnu/packages/patches/python-3-arm-alignment.patch
new file mode 100644
index 0000000000..065c1a7bb2
--- /dev/null
+++ b/gnu/packages/patches/python-3-arm-alignment.patch
@@ -0,0 +1,21 @@
+Ensure memory accesses in the sha3 module are aligned on ARM as it causes
+problems when running 32-bit code on a 64-bit kernel.
+
+Patch taken from upstream bug report:
+https://bugs.python.org/issue36515
+
+--- 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
++#endif
++
+ /* mangle names */
+ #define KeccakF1600_FastLoop_Absorb _PySHA3_KeccakF1600_FastLoop_Absorb
+ #define Keccak_HashFinal _PySHA3_Keccak_HashFinal