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