862e0d2e1b
Fuchsia/Zircon recently added support for exposing arm64 CPU features; this CL uses the new system call to set OPENSSL_armcap_P. Change-Id: I045dc0b58117afe6dae315a82bf9acfd8d99be1a Reviewed-on: https://boringssl-review.googlesource.com/25865 Reviewed-by: David Benjamin <davidben@google.com> Commit-Queue: David Benjamin <davidben@google.com> CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* 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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