/*
- * Copyright 1998-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1998-2021 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* https://www.openssl.org/source/license.html
*/
-#include "e_os.h"
+#include "internal/e_os.h"
#include "crypto/cryptlib.h"
#include <openssl/safestack.h>
-#if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
- defined(__x86_64) || defined(__x86_64__) || \
- defined(_M_AMD64) || defined(_M_X64)
-
-extern unsigned int OPENSSL_ia32cap_P[4];
-
-# if defined(OPENSSL_CPUID_OBJ)
-
-/*
- * Purpose of these minimalistic and character-type-agnostic subroutines
- * is to break dependency on MSVCRT (on Windows) and locale. This makes
- * OPENSSL_cpuid_setup safe to use as "constructor". "Character-type-
- * agnostic" means that they work with either wide or 8-bit characters,
- * exploiting the fact that first 127 characters can be simply casted
- * between the sets, while the rest would be simply rejected by ossl_is*
- * subroutines.
- */
-# ifdef _WIN32
-typedef WCHAR variant_char;
-
-static variant_char *ossl_getenv(const char *name)
-{
- /*
- * Since we pull only one environment variable, it's simpler to
- * to just ignore |name| and use equivalent wide-char L-literal.
- * As well as to ignore excessively long values...
- */
- static WCHAR value[48];
- DWORD len = GetEnvironmentVariableW(L"OPENSSL_ia32cap", value, 48);
-
- return (len > 0 && len < 48) ? value : NULL;
-}
-# else
-typedef char variant_char;
-# define ossl_getenv getenv
-# endif
-
-# include "crypto/ctype.h"
-
-static int todigit(variant_char c)
-{
- if (ossl_isdigit(c))
- return c - '0';
- else if (ossl_isxdigit(c))
- return ossl_tolower(c) - 'a' + 10;
-
- /* return largest base value to make caller terminate the loop */
- return 16;
-}
-
-static uint64_t ossl_strtouint64(const variant_char *str)
-{
- uint64_t ret = 0;
- unsigned int digit, base = 10;
-
- if (*str == '0') {
- base = 8, str++;
- if (ossl_tolower(*str) == 'x')
- base = 16, str++;
- }
-
- while((digit = todigit(*str++)) < base)
- ret = ret * base + digit;
-
- return ret;
-}
-
-static variant_char *ossl_strchr(const variant_char *str, char srch)
-{ variant_char c;
-
- while((c = *str)) {
- if (c == srch)
- return (variant_char *)str;
- str++;
- }
-
- return NULL;
-}
-
-# define OPENSSL_CPUID_SETUP
-typedef uint64_t IA32CAP;
-
-void OPENSSL_cpuid_setup(void)
-{
- static int trigger = 0;
- IA32CAP OPENSSL_ia32_cpuid(unsigned int *);
- IA32CAP vec;
- const variant_char *env;
-
- if (trigger)
- return;
-
- trigger = 1;
- if ((env = ossl_getenv("OPENSSL_ia32cap")) != NULL) {
- int off = (env[0] == '~') ? 1 : 0;
-
- vec = ossl_strtouint64(env + off);
-
- if (off) {
- IA32CAP mask = vec;
- vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P) & ~mask;
- if (mask & (1<<24)) {
- /*
- * User disables FXSR bit, mask even other capabilities
- * that operate exclusively on XMM, so we don't have to
- * double-check all the time. We mask PCLMULQDQ, AMD XOP,
- * AES-NI and AVX. Formally speaking we don't have to
- * do it in x86_64 case, but we can safely assume that
- * x86_64 users won't actually flip this flag.
- */
- vec &= ~((IA32CAP)(1<<1|1<<11|1<<25|1<<28) << 32);
- }
- } else if (env[0] == ':') {
- vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
- }
-
- if ((env = ossl_strchr(env, ':')) != NULL) {
- IA32CAP vecx;
-
- env++;
- off = (env[0] == '~') ? 1 : 0;
- vecx = ossl_strtouint64(env + off);
- if (off) {
- OPENSSL_ia32cap_P[2] &= ~(unsigned int)vecx;
- OPENSSL_ia32cap_P[3] &= ~(unsigned int)(vecx >> 32);
- } else {
- OPENSSL_ia32cap_P[2] = (unsigned int)vecx;
- OPENSSL_ia32cap_P[3] = (unsigned int)(vecx >> 32);
- }
- } else {
- OPENSSL_ia32cap_P[2] = 0;
- OPENSSL_ia32cap_P[3] = 0;
- }
- } else {
- vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
- }
-
- /*
- * |(1<<10) sets a reserved bit to signal that variable
- * was initialized already... This is to avoid interference
- * with cpuid snippets in ELF .init segment.
- */
- OPENSSL_ia32cap_P[0] = (unsigned int)vec | (1 << 10);
- OPENSSL_ia32cap_P[1] = (unsigned int)(vec >> 32);
-}
-# else
-unsigned int OPENSSL_ia32cap_P[4];
-# endif
-#endif
-#if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)
-void OPENSSL_cpuid_setup(void)
-{
-}
-#endif
-
#if defined(_WIN32)
# include <tchar.h>
# include <signal.h>
# if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
# ifdef OPENSSL_SYS_WIN_CORE
/* ONECORE is always NONGUI and NT >= 0x0601 */
-
- /*
- * TODO: (For non GUI and no std error cases)
- * Add event logging feature here.
- */
-
# if !defined(NDEBUG)
/*
* We are in a situation where we tried to report a critical
#endif
}
-#if !defined(OPENSSL_CPUID_OBJ)
-/*
- * The volatile is used to to ensure that the compiler generates code that reads
- * all values from the array and doesn't try to optimize this away. The standard
- * doesn't actually require this behavior if the original data pointed to is
- * not volatile, but compilers do this in practice anyway.
- *
- * There are also assembler versions of this function.
- */
-# undef CRYPTO_memcmp
-int CRYPTO_memcmp(const void * in_a, const void * in_b, size_t len)
-{
- size_t i;
- const volatile unsigned char *a = in_a;
- const volatile unsigned char *b = in_b;
- unsigned char x = 0;
-
- for (i = 0; i < len; i++)
- x |= a[i] ^ b[i];
-
- return x;
-}
-
-/*
- * For systems that don't provide an instruction counter register or equivalent.
- */
-uint32_t OPENSSL_rdtsc(void)
-{
- return 0;
-}
-
-size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
-{
- return 0;
-}
-
-size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
-{
- return 0;
-}
-#endif
-
#if defined(__TANDEM) && defined(OPENSSL_VPROC)
/*
* Define a VPROC function for HP NonStop build crypto library.
projects / thirdparty / openssl.git / blobdiff