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