Add support for arm/aarch64 on FreeBSD
Change-Id: Ib3495ddedec533b78884100ff2ff76f7370e7dc6
Bug: 505
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/54105
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
diff --git a/crypto/cpu_arm_freebsd.c b/crypto/cpu_arm_freebsd.c
new file mode 100644
index 0000000..dcc7920
--- /dev/null
+++ b/crypto/cpu_arm_freebsd.c
@@ -0,0 +1,55 @@
+/* Copyright (c) 2022, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include "internal.h"
+
+#if defined(OPENSSL_ARM) && defined(OPENSSL_FREEBSD) && \
+ !defined(OPENSSL_STATIC_ARMCAP)
+#include <sys/auxv.h>
+#include <sys/types.h>
+
+#include <openssl/arm_arch.h>
+#include <openssl/mem.h>
+
+extern uint32_t OPENSSL_armcap_P;
+
+void OPENSSL_cpuid_setup(void) {
+ unsigned long hwcap = 0, hwcap2 = 0;
+
+ // |elf_aux_info| may fail, in which case |hwcap| and |hwcap2| will be
+ // left at zero. The rest of this function will then gracefully report
+ // the features are absent.
+ elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
+ elf_aux_info(AT_HWCAP2, &hwcap2, sizeof(hwcap2));
+
+ // Matching OpenSSL, only report other features if NEON is present.
+ if (hwcap & HWCAP_NEON) {
+ OPENSSL_armcap_P |= ARMV7_NEON;
+
+ if (hwcap2 & HWCAP2_AES) {
+ OPENSSL_armcap_P |= ARMV8_AES;
+ }
+ if (hwcap2 & HWCAP2_PMULL) {
+ OPENSSL_armcap_P |= ARMV8_PMULL;
+ }
+ if (hwcap2 & HWCAP2_SHA1) {
+ OPENSSL_armcap_P |= ARMV8_SHA1;
+ }
+ if (hwcap2 & HWCAP2_SHA2) {
+ OPENSSL_armcap_P |= ARMV8_SHA256;
+ }
+ }
+}
+
+#endif // OPENSSL_ARM && OPENSSL_OPENBSD && !OPENSSL_STATIC_ARMCAP
