1/*- 2 * Copyright (c) 2013-2015 Mark R V Murray 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 30#ifndef UNIT_TEST_H_INCLUDED 31#define UNIT_TEST_H_INCLUDED 32 33#ifdef _KERNEL 34#error "Random unit tests cannot be compiled into the kernel." 35#endif 36 37#include <sys/types.h> 38#include <inttypes.h> 39#include <stdint.h> 40 41#if defined(clang) && __has_builtin(__builtin_readcyclecounter) 42#define rdtsc __builtin_readcyclecounter 43#else /* !clang */ 44#if defined(__amd64__) || defined(__i386__) 45static __inline uint64_t 46rdtsc(void) 47{ 48 uint32_t low, high; 49 50 __asm __volatile("rdtsc" : "=a" (low), "=d" (high)); 51 return (low | ((uint64_t)high << 32)); 52} 53#else /* __amd64__ || __i386__ */ 54#error "No rdtsc() implementation available." 55#endif /* __amd64__ || __i386__ */ 56#endif /* !clang */ 57 58static __inline uint64_t 59get_cyclecount(void) 60{ 61 62 return (rdtsc()); 63} 64 65#define HARVESTSIZE 2 66#define RANDOM_BLOCKSIZE 16 67 68enum random_entropy_source { 69 RANDOM_START = 0, 70 RANDOM_CACHED = 0, 71 ENTROPYSOURCE = 32 72}; 73 74struct harvest_event { 75 uintmax_t he_somecounter; /* fast counter for clock jitter */ 76 uint32_t he_entropy[HARVESTSIZE];/* some harvested entropy */ 77 u_int he_size; /* harvested entropy byte count */ 78 u_int he_bits; /* stats about the entropy */ 79 u_int he_destination; /* destination pool of this entropy */ 80 enum random_entropy_source he_source; /* origin of the entropy */ 81 void * he_next; /* next item on the list */ 82}; 83 84struct sysctl_ctx_list; 85 86#define CTASSERT(x) _Static_assert(x, "compile-time assertion failed") 87#define KASSERT(exp,msg) do { \ 88 if (!(exp)) { \ 89 printf msg; \ 90 exit(0); \ 91 } \ 92} while (0) 93 94#endif /* UNIT_TEST_H_INCLUDED */ 95