| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #if !defined(__STDC_FORMAT_MACROS) |
| #define __STDC_FORMAT_MACROS |
| #endif |
| |
| #include <openssl/cpu.h> |
| |
| |
| #if !defined(OPENSSL_NO_ASM) && (defined(OPENSSL_X86) || defined(OPENSSL_X86_64)) |
| |
| #include <stdio.h> |
| #include <inttypes.h> |
| |
| /* This value must be explicitly initialised to zero in order to work around a |
| * bug in libtool or the linker on OS X. |
| * |
| * If not initialised then it becomes a "common symbol". When put into an |
| * archive, linking on OS X will fail to resolve common symbols. By |
| * initialising it to zero, it becomes a "data symbol", which isn't so |
| * affected. */ |
| uint32_t OPENSSL_ia32cap_P[4] = {0}; |
| |
| /* OPENSSL_ia32_cpuid is defined in cpu-x86_64-asm.pl. */ |
| extern uint64_t OPENSSL_ia32_cpuid(uint32_t*); |
| |
| /* handle_cpu_env applies the value from |in| to the CPUID values in |out[0]| |
| * and |out[1]|. See the comment in |OPENSSL_cpuid_setup| about this. */ |
| static void handle_cpu_env(uint32_t *out, const char *in) { |
| const int invert = in[0] == '~'; |
| uint64_t v; |
| |
| if (!sscanf(in + invert, "%" PRIi64, &v)) { |
| return; |
| } |
| |
| if (invert) { |
| out[0] &= ~v; |
| out[1] &= ~(v >> 32); |
| } else { |
| out[0] = v; |
| out[1] = v >> 32; |
| } |
| } |
| |
| void OPENSSL_cpuid_setup(void) { |
| const char *env1, *env2; |
| |
| #if defined(OPENSSL_X86_64) |
| OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P); |
| #else |
| uint64_t vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P); |
| /* 1<<10 sets a reserved bit to indicate that the variable |
| * was already initialised. */ |
| OPENSSL_ia32cap_P[0] = ((uint32_t)vec) | (1 << 10); |
| OPENSSL_ia32cap_P[1] = vec >> 32; |
| #endif |
| |
| env1 = getenv("OPENSSL_ia32cap"); |
| if (env1 == NULL) { |
| return; |
| } |
| |
| /* OPENSSL_ia32cap can contain zero, one or two values, separated with a ':'. |
| * Each value is a 64-bit, unsigned value which may start with "0x" to |
| * indicate a hex value. Prior to the 64-bit value, a '~' may be given. |
| * |
| * If '~' isn't present, then the value is taken as the result of the CPUID. |
| * Otherwise the value is inverted and ANDed with the probed CPUID result. |
| * |
| * The first value determines OPENSSL_ia32cap_P[0] and [1]. The second [2] |
| * and [3]. */ |
| |
| handle_cpu_env(&OPENSSL_ia32cap_P[0], env1); |
| env2 = strchr(env1, ':'); |
| if (env2 != NULL) { |
| handle_cpu_env(&OPENSSL_ia32cap_P[2], env2 + 1); |
| } |
| } |
| |
| #endif /* !OPENSSL_NO_ASM && (OPENSSL_X86 || OPENSSL_X86_64) */ |