Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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56 lines
1.8 KiB
56 lines
1.8 KiB
2 years ago
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/* 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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