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/* 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) */
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