| // Copyright 2022 The BoringSSL Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "internal.h" |
| |
| #if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_ARM) && \ |
| defined(OPENSSL_FREEBSD) && !defined(OPENSSL_STATIC_ARMCAP) |
| #include <sys/auxv.h> |
| #include <sys/types.h> |
| |
| #include <openssl/mem.h> |
| |
| |
| 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 |
