cpu_arm_linux.h | Explore in Territory

/* Copyright (c) 2018, 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. */

#ifndef OPENSSL_HEADER_CRYPTO_CPU_ARM_LINUX_H
#define OPENSSL_HEADER_CRYPTO_CPU_ARM_LINUX_H

#include <openssl/base.h>

#include <string.h>

#include "internal.h"

#if defined(__cplusplus)
extern "C" {
#endif


// The cpuinfo parser lives in a header file so it may be accessible from
// cross-platform fuzzers without adding code to those platforms normally.

#define HWCAP_NEON …

// See /usr/include/asm/hwcap.h on an ARM installation for the source of
// these values.
#define HWCAP2_AES …
#define HWCAP2_PMULL …
#define HWCAP2_SHA1 …
#define HWCAP2_SHA2 …

STRING_PIECE;

static int STRING_PIECE_equals(const STRING_PIECE *a, const char *b) { … }

// STRING_PIECE_split finds the first occurence of |sep| in |in| and, if found,
// sets |*out_left| and |*out_right| to |in| split before and after it. It
// returns one if |sep| was found and zero otherwise.
static int STRING_PIECE_split(STRING_PIECE *out_left, STRING_PIECE *out_right,
                              const STRING_PIECE *in, char sep) { … }

// STRING_PIECE_get_delimited reads a |sep|-delimited entry from |s|, writing it
// to |out| and updating |s| to point beyond it. It returns one on success and
// zero if |s| is empty. If |s| is has no copies of |sep| and is non-empty, it
// reads the entire string to |out|.
static int STRING_PIECE_get_delimited(STRING_PIECE *s, STRING_PIECE *out, char sep) { … }

// STRING_PIECE_trim removes leading and trailing whitespace from |s|.
static void STRING_PIECE_trim(STRING_PIECE *s) { … }

// extract_cpuinfo_field extracts a /proc/cpuinfo field named |field| from
// |in|. If found, it sets |*out| to the value and returns one. Otherwise, it
// returns zero.
static int extract_cpuinfo_field(STRING_PIECE *out, const STRING_PIECE *in,
                                 const char *field) { … }

// has_list_item treats |list| as a space-separated list of items and returns
// one if |item| is contained in |list| and zero otherwise.
static int has_list_item(const STRING_PIECE *list, const char *item) { … }

// crypto_get_arm_hwcap2_from_cpuinfo returns an equivalent ARM |AT_HWCAP2|
// value from |cpuinfo|.
static unsigned long crypto_get_arm_hwcap2_from_cpuinfo(
    const STRING_PIECE *cpuinfo) { … }


#if defined(__cplusplus)
}  // extern C
#endif

#endif  // OPENSSL_HEADER_CRYPTO_CPU_ARM_LINUX_H
chromium/third_party/boringssl/src/crypto/cpu_arm_linux.h
