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>

crypto/CMakeLists.txt

@@ -263,9 +263,11 @@ add_library(
   cipher_extra/tls_cbc.c
   conf/conf.c
   cpu_aarch64_apple.c
+  cpu_aarch64_freebsd.c
   cpu_aarch64_fuchsia.c
   cpu_aarch64_linux.c
   cpu_aarch64_win.c
+  cpu_arm_freebsd.c
   cpu_arm_linux.c
   cpu_arm.c
   cpu_intel.c

crypto/cpu_aarch64_freebsd.c

@@ -0,0 +1,59 @@
+/* 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_AARCH64) && defined(OPENSSL_FREEBSD) && \
+    !defined(OPENSSL_STATIC_ARMCAP)
+
+#include <machine/armreg.h>
+#include <sys/types.h>
+
+#include <openssl/arm_arch.h>
+
+extern uint32_t OPENSSL_armcap_P;
+
+// ID_AA64ISAR0_*_VAL are defined starting FreeBSD 13.0. When FreeBSD
+// 12.x is out of support, these compatibility macros can be removed.
+
+#ifndef ID_AA64ISAR0_AES_VAL
+#define ID_AA64ISAR0_AES_VAL ID_AA64ISAR0_AES
+#endif
+#ifndef ID_AA64ISAR0_SHA1_VAL
+#define ID_AA64ISAR0_SHA1_VAL ID_AA64ISAR0_SHA1
+#endif
+#ifndef ID_AA64ISAR0_SHA2_VAL
+#define ID_AA64ISAR0_SHA2_VAL ID_AA64ISAR0_SHA2
+#endif
+
+void OPENSSL_cpuid_setup(void) {
+  uint64_t id_aa64isar0 = READ_SPECIALREG(id_aa64isar0_el1);
+
+  OPENSSL_armcap_P |= ARMV7_NEON;
+
+  if (ID_AA64ISAR0_AES_VAL(id_aa64isar0) >= ID_AA64ISAR0_AES_BASE) {
+    OPENSSL_armcap_P |= ARMV8_AES;
+  }
+  if (ID_AA64ISAR0_AES_VAL(id_aa64isar0) >= ID_AA64ISAR0_AES_PMULL) {
+    OPENSSL_armcap_P |= ARMV8_PMULL;
+  }
+  if (ID_AA64ISAR0_SHA1_VAL(id_aa64isar0) >= ID_AA64ISAR0_SHA1_BASE) {
+    OPENSSL_armcap_P |= ARMV8_SHA1;
+  }
+  if (ID_AA64ISAR0_SHA2_VAL(id_aa64isar0) >= ID_AA64ISAR0_SHA2_BASE) {
+    OPENSSL_armcap_P |= ARMV8_SHA256;
+  }
+}
+
+#endif  // OPENSSL_AARCH64 && OPENSSL_FREEBSD && !OPENSSL_STATIC_ARMCAP

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