+++ /dev/null
-/*
- * Portable interface to the CPU cycle counter
- *
- * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
- * SPDX-License-Identifier: GPL-2.0
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * This file is part of mbed TLS (https://tls.mbed.org)
- */
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdio.h>
-#define mbedtls_printf printf
-#endif
-
-#if defined(MBEDTLS_TIMING_C)
-
-#include "mbedtls/timing.h"
-
-#if !defined(MBEDTLS_TIMING_ALT)
-
-#if !defined(unix) && !defined(__unix__) && !defined(__unix) && \
- !defined(__APPLE__) && !defined(_WIN32)
-#error "This module only works on Unix and Windows, see MBEDTLS_TIMING_C in config.h"
-#endif
-
-#ifndef asm
-#define asm __asm
-#endif
-
-#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
-
-#include <windows.h>
-#include <winbase.h>
-
-struct _hr_time
-{
- LARGE_INTEGER start;
-};
-
-#else
-
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <signal.h>
-#include <time.h>
-
-struct _hr_time
-{
- struct timeval start;
-};
-
-#endif /* _WIN32 && !EFIX64 && !EFI32 */
-
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- ( defined(_MSC_VER) && defined(_M_IX86) ) || defined(__WATCOMC__)
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long tsc;
- __asm rdtsc
- __asm mov [tsc], eax
- return( tsc );
-}
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- ( _MSC_VER && _M_IX86 ) || __WATCOMC__ */
-
-/* some versions of mingw-64 have 32-bit longs even on x84_64 */
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- defined(__GNUC__) && ( defined(__i386__) || ( \
- ( defined(__amd64__) || defined( __x86_64__) ) && __SIZEOF_LONG__ == 4 ) )
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long lo, hi;
- asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) );
- return( lo );
-}
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- __GNUC__ && __i386__ */
-
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- defined(__GNUC__) && ( defined(__amd64__) || defined(__x86_64__) )
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long lo, hi;
- asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) );
- return( lo | ( hi << 32 ) );
-}
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- __GNUC__ && ( __amd64__ || __x86_64__ ) */
-
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- defined(__GNUC__) && ( defined(__powerpc__) || defined(__ppc__) )
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long tbl, tbu0, tbu1;
-
- do
- {
- asm volatile( "mftbu %0" : "=r" (tbu0) );
- asm volatile( "mftb %0" : "=r" (tbl ) );
- asm volatile( "mftbu %0" : "=r" (tbu1) );
- }
- while( tbu0 != tbu1 );
-
- return( tbl );
-}
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- __GNUC__ && ( __powerpc__ || __ppc__ ) */
-
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- defined(__GNUC__) && defined(__sparc64__)
-
-#if defined(__OpenBSD__)
-#warning OpenBSD does not allow access to tick register using software version instead
-#else
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long tick;
- asm volatile( "rdpr %%tick, %0;" : "=&r" (tick) );
- return( tick );
-}
-#endif /* __OpenBSD__ */
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- __GNUC__ && __sparc64__ */
-
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- defined(__GNUC__) && defined(__sparc__) && !defined(__sparc64__)
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long tick;
- asm volatile( ".byte 0x83, 0x41, 0x00, 0x00" );
- asm volatile( "mov %%g1, %0" : "=r" (tick) );
- return( tick );
-}
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- __GNUC__ && __sparc__ && !__sparc64__ */
-
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- defined(__GNUC__) && defined(__alpha__)
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long cc;
- asm volatile( "rpcc %0" : "=r" (cc) );
- return( cc & 0xFFFFFFFF );
-}
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- __GNUC__ && __alpha__ */
-
-#if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
- defined(__GNUC__) && defined(__ia64__)
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- unsigned long itc;
- asm volatile( "mov %0 = ar.itc" : "=r" (itc) );
- return( itc );
-}
-#endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
- __GNUC__ && __ia64__ */
-
-#if !defined(HAVE_HARDCLOCK) && defined(_MSC_VER) && \
- !defined(EFIX64) && !defined(EFI32)
-
-#define HAVE_HARDCLOCK
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- LARGE_INTEGER offset;
-
- QueryPerformanceCounter( &offset );
-
- return( (unsigned long)( offset.QuadPart ) );
-}
-#endif /* !HAVE_HARDCLOCK && _MSC_VER && !EFIX64 && !EFI32 */
-
-#if !defined(HAVE_HARDCLOCK)
-
-#define HAVE_HARDCLOCK
-
-static int hardclock_init = 0;
-static struct timeval tv_init;
-
-unsigned long mbedtls_timing_hardclock( void )
-{
- struct timeval tv_cur;
-
- if( hardclock_init == 0 )
- {
- gettimeofday( &tv_init, NULL );
- hardclock_init = 1;
- }
-
- gettimeofday( &tv_cur, NULL );
- return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000
- + ( tv_cur.tv_usec - tv_init.tv_usec ) );
-}
-#endif /* !HAVE_HARDCLOCK */
-
-volatile int mbedtls_timing_alarmed = 0;
-
-#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
-
-unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
-{
- unsigned long delta;
- LARGE_INTEGER offset, hfreq;
- struct _hr_time *t = (struct _hr_time *) val;
-
- QueryPerformanceCounter( &offset );
- QueryPerformanceFrequency( &hfreq );
-
- delta = (unsigned long)( ( 1000 *
- ( offset.QuadPart - t->start.QuadPart ) ) /
- hfreq.QuadPart );
-
- if( reset )
- QueryPerformanceCounter( &t->start );
-
- return( delta );
-}
-
-/* It's OK to use a global because alarm() is supposed to be global anyway */
-static DWORD alarmMs;
-
-static DWORD WINAPI TimerProc( LPVOID TimerContext )
-{
- ((void) TimerContext);
- Sleep( alarmMs );
- mbedtls_timing_alarmed = 1;
- return( TRUE );
-}
-
-void mbedtls_set_alarm( int seconds )
-{
- DWORD ThreadId;
-
- mbedtls_timing_alarmed = 0;
- alarmMs = seconds * 1000;
- CloseHandle( CreateThread( NULL, 0, TimerProc, NULL, 0, &ThreadId ) );
-}
-
-#else /* _WIN32 && !EFIX64 && !EFI32 */
-
-unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
-{
- unsigned long delta;
- struct timeval offset;
- struct _hr_time *t = (struct _hr_time *) val;
-
- gettimeofday( &offset, NULL );
-
- if( reset )
- {
- t->start.tv_sec = offset.tv_sec;
- t->start.tv_usec = offset.tv_usec;
- return( 0 );
- }
-
- delta = ( offset.tv_sec - t->start.tv_sec ) * 1000
- + ( offset.tv_usec - t->start.tv_usec ) / 1000;
-
- return( delta );
-}
-
-static void sighandler( int signum )
-{
- mbedtls_timing_alarmed = 1;
- signal( signum, sighandler );
-}
-
-void mbedtls_set_alarm( int seconds )
-{
- mbedtls_timing_alarmed = 0;
- signal( SIGALRM, sighandler );
- alarm( seconds );
-}
-
-#endif /* _WIN32 && !EFIX64 && !EFI32 */
-
-/*
- * Set delays to watch
- */
-void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms )
-{
- mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
-
- ctx->int_ms = int_ms;
- ctx->fin_ms = fin_ms;
-
- if( fin_ms != 0 )
- (void) mbedtls_timing_get_timer( &ctx->timer, 1 );
-}
-
-/*
- * Get number of delays expired
- */
-int mbedtls_timing_get_delay( void *data )
-{
- mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
- unsigned long elapsed_ms;
-
- if( ctx->fin_ms == 0 )
- return( -1 );
-
- elapsed_ms = mbedtls_timing_get_timer( &ctx->timer, 0 );
-
- if( elapsed_ms >= ctx->fin_ms )
- return( 2 );
-
- if( elapsed_ms >= ctx->int_ms )
- return( 1 );
-
- return( 0 );
-}
-
-#endif /* !MBEDTLS_TIMING_ALT */
-
-#if defined(MBEDTLS_SELF_TEST)
-
-/*
- * Busy-waits for the given number of milliseconds.
- * Used for testing mbedtls_timing_hardclock.
- */
-static void busy_msleep( unsigned long msec )
-{
- struct mbedtls_timing_hr_time hires;
- unsigned long i = 0; /* for busy-waiting */
- volatile unsigned long j; /* to prevent optimisation */
-
- (void) mbedtls_timing_get_timer( &hires, 1 );
-
- while( mbedtls_timing_get_timer( &hires, 0 ) < msec )
- i++;
-
- j = i;
- (void) j;
-}
-
-#define FAIL do \
-{ \
- if( verbose != 0 ) \
- mbedtls_printf( "failed\n" ); \
- \
- return( 1 ); \
-} while( 0 )
-
-/*
- * Checkup routine
- *
- * Warning: this is work in progress, some tests may not be reliable enough
- * yet! False positives may happen.
- */
-int mbedtls_timing_self_test( int verbose )
-{
- unsigned long cycles, ratio;
- unsigned long millisecs, secs;
- int hardfail;
- struct mbedtls_timing_hr_time hires;
- uint32_t a, b;
- mbedtls_timing_delay_context ctx;
-
- if( verbose != 0 )
- mbedtls_printf( " TIMING tests note: will take some time!\n" );
-
-
- if( verbose != 0 )
- mbedtls_printf( " TIMING test #1 (set_alarm / get_timer): " );
-
- for( secs = 1; secs <= 3; secs++ )
- {
- (void) mbedtls_timing_get_timer( &hires, 1 );
-
- mbedtls_set_alarm( (int) secs );
- while( !mbedtls_timing_alarmed )
- ;
-
- millisecs = mbedtls_timing_get_timer( &hires, 0 );
-
- /* For some reason on Windows it looks like alarm has an extra delay
- * (maybe related to creating a new thread). Allow some room here. */
- if( millisecs < 800 * secs || millisecs > 1200 * secs + 300 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed\n" );
-
- return( 1 );
- }
- }
-
- if( verbose != 0 )
- mbedtls_printf( "passed\n" );
-
- if( verbose != 0 )
- mbedtls_printf( " TIMING test #2 (set/get_delay ): " );
-
- for( a = 200; a <= 400; a += 200 )
- {
- for( b = 200; b <= 400; b += 200 )
- {
- mbedtls_timing_set_delay( &ctx, a, a + b );
-
- busy_msleep( a - a / 8 );
- if( mbedtls_timing_get_delay( &ctx ) != 0 )
- FAIL;
-
- busy_msleep( a / 4 );
- if( mbedtls_timing_get_delay( &ctx ) != 1 )
- FAIL;
-
- busy_msleep( b - a / 8 - b / 8 );
- if( mbedtls_timing_get_delay( &ctx ) != 1 )
- FAIL;
-
- busy_msleep( b / 4 );
- if( mbedtls_timing_get_delay( &ctx ) != 2 )
- FAIL;
- }
- }
-
- mbedtls_timing_set_delay( &ctx, 0, 0 );
- busy_msleep( 200 );
- if( mbedtls_timing_get_delay( &ctx ) != -1 )
- FAIL;
-
- if( verbose != 0 )
- mbedtls_printf( "passed\n" );
-
- if( verbose != 0 )
- mbedtls_printf( " TIMING test #3 (hardclock / get_timer): " );
-
- /*
- * Allow one failure for possible counter wrapping.
- * On a 4Ghz 32-bit machine the cycle counter wraps about once per second;
- * since the whole test is about 10ms, it shouldn't happen twice in a row.
- */
- hardfail = 0;
-
-hard_test:
- if( hardfail > 1 )
- {
- if( verbose != 0 )
- mbedtls_printf( "failed (ignored)\n" );
-
- goto hard_test_done;
- }
-
- /* Get a reference ratio cycles/ms */
- millisecs = 1;
- cycles = mbedtls_timing_hardclock();
- busy_msleep( millisecs );
- cycles = mbedtls_timing_hardclock() - cycles;
- ratio = cycles / millisecs;
-
- /* Check that the ratio is mostly constant */
- for( millisecs = 2; millisecs <= 4; millisecs++ )
- {
- cycles = mbedtls_timing_hardclock();
- busy_msleep( millisecs );
- cycles = mbedtls_timing_hardclock() - cycles;
-
- /* Allow variation up to 20% */
- if( cycles / millisecs < ratio - ratio / 5 ||
- cycles / millisecs > ratio + ratio / 5 )
- {
- hardfail++;
- goto hard_test;
- }
- }
-
- if( verbose != 0 )
- mbedtls_printf( "passed\n" );
-
-hard_test_done:
-
- if( verbose != 0 )
- mbedtls_printf( "\n" );
-
- return( 0 );
-}
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#endif /* MBEDTLS_TIMING_C */
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