| /* Copyright (c) 2016, 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 <openssl/cpu.h> | |
| #if defined(OPENSSL_AARCH64) && !defined(OPENSSL_STATIC_ARMCAP) | |
| #include <sys/auxv.h> | |
| #include <openssl/arm_arch.h> | |
| #include "internal.h" | |
| extern uint32_t OPENSSL_armcap_P; | |
| void OPENSSL_cpuid_setup(void) { | |
| unsigned long hwcap = getauxval(AT_HWCAP); | |
| // See /usr/include/asm/hwcap.h on an aarch64 installation for the source of | |
| // these values. | |
| static const unsigned long kNEON = 1 << 1; | |
| static const unsigned long kAES = 1 << 3; | |
| static const unsigned long kPMULL = 1 << 4; | |
| static const unsigned long kSHA1 = 1 << 5; | |
| static const unsigned long kSHA256 = 1 << 6; | |
| if ((hwcap & kNEON) == 0) { | |
| // Matching OpenSSL, if NEON is missing, don't report other features | |
| // either. | |
| return; | |
| } | |
| OPENSSL_armcap_P |= ARMV7_NEON; | |
| if (hwcap & kAES) { | |
| OPENSSL_armcap_P |= ARMV8_AES; | |
| } | |
| if (hwcap & kPMULL) { | |
| OPENSSL_armcap_P |= ARMV8_PMULL; | |
| } | |
| if (hwcap & kSHA1) { | |
| OPENSSL_armcap_P |= ARMV8_SHA1; | |
| } | |
| if (hwcap & kSHA256) { | |
| OPENSSL_armcap_P |= ARMV8_SHA256; | |
| } | |
| } | |
| #endif // OPENSSL_AARCH64 && !OPENSSL_STATIC_ARMCAP |