| /* Copyright 2022 The BoringSSL Authors |
| * |
| * 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_NO_ASM) && 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> |
| |
| |
| 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 |
