Provide crypto_cpu_caps_init() as a CPU capability detection entry point.

This can be overridden on a per-architecture basis. The default version
calls OPENSSL_cpuid_setup(), which will be eventually replaced/removed.

ok joshua@ tb@

3 files changed, 18 insertions, 5 deletions

diff --git a/src/lib/libcrypto/cryptlib.c b/src/lib/libcrypto/cryptlib.c
index fe15135ed9..60f14eba12 100644
--- a/src/lib/libcrypto/cryptlib.c
+++ b/src/lib/libcrypto/cryptlib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cryptlib.c,v 1.55 2024/10/17 14:09:29 jsing Exp $ */
+/* $OpenBSD: cryptlib.c,v 1.56 2024/10/17 14:27:57 jsing Exp $ */
 /* ====================================================================
  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
  *
@@ -124,6 +124,8 @@
 #include <openssl/opensslconf.h>
 #include <openssl/crypto.h>
 
+#include "cryptlib.h"
+#include "crypto_internal.h"
 #include "crypto_local.h"
 #include "x86_arch.h"
 
@@ -369,6 +371,14 @@ OPENSSL_cpuid_setup(void)
 }
 #endif
 
+#ifndef HAVE_CRYPTO_CPU_CAPS_INIT
+void
+crypto_cpu_caps_init(void)
+{
+        OPENSSL_cpuid_setup();
+}
+#endif
+
 uint64_t
 OPENSSL_cpu_caps(void)
 {
diff --git a/src/lib/libcrypto/crypto_init.c b/src/lib/libcrypto/crypto_init.c
index d2d06f87df..6016d1ae40 100644
--- a/src/lib/libcrypto/crypto_init.c
+++ b/src/lib/libcrypto/crypto_init.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: crypto_init.c,v 1.21 2024/04/10 14:51:02 beck Exp $ */
+/*      $OpenBSD: crypto_init.c,v 1.22 2024/10/17 14:27:57 jsing Exp $ */
 /*
  * Copyright (c) 2018 Bob Beck <beck@openbsd.org>
  *
@@ -27,7 +27,7 @@
 #include <openssl/objects.h>
 #include <openssl/x509v3.h>
 
-#include "cryptlib.h"
+#include "crypto_internal.h"
 #include "x509_issuer_cache.h"
 
 int OpenSSL_config(const char *);
@@ -48,7 +48,8 @@ OPENSSL_init_crypto_internal(void)
 {
         crypto_init_thread = pthread_self();
 
-        OPENSSL_cpuid_setup();
+        crypto_cpu_caps_init();
+
         ERR_load_crypto_strings();
 }
 
diff --git a/src/lib/libcrypto/crypto_internal.h b/src/lib/libcrypto/crypto_internal.h
index fc617472ad..2c2e63cc0d 100644
--- a/src/lib/libcrypto/crypto_internal.h
+++ b/src/lib/libcrypto/crypto_internal.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: crypto_internal.h,v 1.12 2024/09/06 09:57:32 tb Exp $ */
+/*      $OpenBSD: crypto_internal.h,v 1.13 2024/10/17 14:27:57 jsing Exp $ */
 /*
  * Copyright (c) 2023 Joel Sing <jsing@openbsd.org>
  *
@@ -220,6 +220,8 @@ crypto_ror_u64(uint64_t v, size_t shift)
 }
 #endif
 
+void crypto_cpu_caps_init(void);
+
 uint64_t crypto_cpu_caps_ia32(void);
 
 #endif