David Benjamin
9bb8f779a7
This header used to supply CPU capability constants and things like __ARM_MAX_ARCH__. The latter is now part of asm_base.h, automatically included by everything, and assembly files no longer do capability checks. The immediate motivation was that there were a few misspelled includes that used "openssl/arm_arch.h" instead of <openssl/arm_arch.h> (see https://boringssl-review.googlesource.com/c/boringssl/+/76247), but given we can just remove them anyway, may as well clear this out. This now also means we don't pollute another prefix in the global namespace (though external callers shouldn't have been using this header anyway). I've kept the header around, but a no-op, because some bindings libraries have explicitly listed the header and it's probably not worth the trouble to clear those out. Bug: 42290548 Change-Id: I24f36cd48b0e3b6498ecbdc70fecc36961a8b9fe Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/76248 Auto-Submit: David Benjamin <davidben@google.com> Reviewed-by: Bob Beck <bbe@google.com> Commit-Queue: Bob Beck <bbe@google.com>
61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
// Copyright 2016 The BoringSSL Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "internal.h"
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#if defined(OPENSSL_AARCH64) && defined(OPENSSL_LINUX) && \
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!defined(OPENSSL_STATIC_ARMCAP) && !defined(OPENSSL_NO_ASM)
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#include <sys/auxv.h>
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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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static const unsigned long kSHA512 = 1 << 21;
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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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if (hwcap & kSHA512) {
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OPENSSL_armcap_P |= ARMV8_SHA512;
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}
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}
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#endif // OPENSSL_AARCH64 && OPENSSL_LINUX && !OPENSSL_STATIC_ARMCAP
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