https://lists.busybox.net/pipermail/busybox/2024-September/090899.html
[PATCH] libbb/sha: add missing sha-NI guard
Andre Przywara andre.przywara at arm.com
Tue Sep 10 13:32:46 UTC 2024

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The ENABLE_SHA1_HWACCEL Kconfig symbol is meant to be archicture
agnostic, so can be enabled regardless of whether your build
architecture provides hardware acceleration or not. At the moment only
x86 implements this, so every piece of optimised code should be guarded
by both ENABLE_SHA1_HWACCEL and (__x86_64__ || __i386__). This is missing
at one place, so compiling for arm64 breaks when ENABLE_SHA1_HWACCEL is
enabled.

--- a/libbb/hash_md5_sha.c
+++ b/libbb/hash_md5_sha.c
@@ -1313,7 +1313,9 @@ unsigned FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
 	hash_size = 8;
 	if (ctx->process_block == sha1_process_block64
 #if ENABLE_SHA1_HWACCEL
+# if defined(__GNUC__) && defined(__x86_64__)
 	 || ctx->process_block == sha1_process_block64_shaNI
+# endif
 #endif
 	) {
 		hash_size = 5;