| Sergey A. Osokin | d66bba9 | 2022-10-12 08:24:45 -0400 | [diff] [blame] | 1 | /* Copyright (c) 2022, Google Inc. |
| 2 | * |
| 3 | * Permission to use, copy, modify, and/or distribute this software for any |
| 4 | * purpose with or without fee is hereby granted, provided that the above |
| 5 | * copyright notice and this permission notice appear in all copies. |
| 6 | * |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 10 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| 12 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 13 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| 14 | |
| 15 | #include "internal.h" |
| 16 | |
| 17 | #if defined(OPENSSL_ARM) && defined(OPENSSL_FREEBSD) && \ |
| 18 | !defined(OPENSSL_STATIC_ARMCAP) |
| 19 | #include <sys/auxv.h> |
| 20 | #include <sys/types.h> |
| 21 | |
| 22 | #include <openssl/arm_arch.h> |
| 23 | #include <openssl/mem.h> |
| 24 | |
| Sergey A. Osokin | d66bba9 | 2022-10-12 08:24:45 -0400 | [diff] [blame] | 25 | |
| 26 | void OPENSSL_cpuid_setup(void) { |
| 27 | unsigned long hwcap = 0, hwcap2 = 0; |
| 28 | |
| 29 | // |elf_aux_info| may fail, in which case |hwcap| and |hwcap2| will be |
| 30 | // left at zero. The rest of this function will then gracefully report |
| 31 | // the features are absent. |
| 32 | elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap)); |
| 33 | elf_aux_info(AT_HWCAP2, &hwcap2, sizeof(hwcap2)); |
| 34 | |
| 35 | // Matching OpenSSL, only report other features if NEON is present. |
| 36 | if (hwcap & HWCAP_NEON) { |
| 37 | OPENSSL_armcap_P |= ARMV7_NEON; |
| 38 | |
| 39 | if (hwcap2 & HWCAP2_AES) { |
| 40 | OPENSSL_armcap_P |= ARMV8_AES; |
| 41 | } |
| 42 | if (hwcap2 & HWCAP2_PMULL) { |
| 43 | OPENSSL_armcap_P |= ARMV8_PMULL; |
| 44 | } |
| 45 | if (hwcap2 & HWCAP2_SHA1) { |
| 46 | OPENSSL_armcap_P |= ARMV8_SHA1; |
| 47 | } |
| 48 | if (hwcap2 & HWCAP2_SHA2) { |
| 49 | OPENSSL_armcap_P |= ARMV8_SHA256; |
| 50 | } |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | #endif // OPENSSL_ARM && OPENSSL_OPENBSD && !OPENSSL_STATIC_ARMCAP |
