guix/gnu/packages/patches/python-3-arm-alignment.patch

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
gnu: Python: Fix test failure on ARMv7. * gnu/packages/patches/python-3-arm-alignment.patch: New file. * gnu/local.mk (dist_patch_DATA): Adjust accordingly. * gnu/packages/python.scm (python-3.8)[source](patches): Add it when the current system is ARM. 2020-04-01 06:58:32 -04:00			`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`