Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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55 lines
1.8 KiB
55 lines
1.8 KiB
/* Copyright (c) 2022, Google Inc. |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
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#include "internal.h" |
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#if defined(OPENSSL_ARM) && defined(OPENSSL_FREEBSD) && \ |
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!defined(OPENSSL_STATIC_ARMCAP) |
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#include <sys/auxv.h> |
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#include <sys/types.h> |
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#include <openssl/arm_arch.h> |
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#include <openssl/mem.h> |
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extern uint32_t OPENSSL_armcap_P; |
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void OPENSSL_cpuid_setup(void) { |
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unsigned long hwcap = 0, hwcap2 = 0; |
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// |elf_aux_info| may fail, in which case |hwcap| and |hwcap2| will be |
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// left at zero. The rest of this function will then gracefully report |
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// the features are absent. |
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elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap)); |
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elf_aux_info(AT_HWCAP2, &hwcap2, sizeof(hwcap2)); |
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// Matching OpenSSL, only report other features if NEON is present. |
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if (hwcap & HWCAP_NEON) { |
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OPENSSL_armcap_P |= ARMV7_NEON; |
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if (hwcap2 & HWCAP2_AES) { |
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OPENSSL_armcap_P |= ARMV8_AES; |
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} |
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if (hwcap2 & HWCAP2_PMULL) { |
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OPENSSL_armcap_P |= ARMV8_PMULL; |
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} |
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if (hwcap2 & HWCAP2_SHA1) { |
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OPENSSL_armcap_P |= ARMV8_SHA1; |
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} |
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if (hwcap2 & HWCAP2_SHA2) { |
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OPENSSL_armcap_P |= ARMV8_SHA256; |
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} |
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} |
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} |
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#endif // OPENSSL_ARM && OPENSSL_OPENBSD && !OPENSSL_STATIC_ARMCAP
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