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__) 45 static __inline uint64_t 46 rdtsc(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 58 static __inline uint64_t 59 get_cyclecount(void) 60 { 61 62 return (rdtsc()); 63 } 64 65 #define HARVESTSIZE 2 66 #define RANDOM_BLOCKSIZE 16 67 68 enum random_entropy_source { 69 RANDOM_START = 0, 70 RANDOM_CACHED = 0, 71 ENTROPYSOURCE = 32 72 }; 73 74 struct harvest_event { 75 uintmax_t he_somecounter; /* fast counter for clock jitter */ 76 uint32_t he_entropy[HARVESTSIZE];/* some harvested entropy */ 77 uint8_t he_size; /* harvested entropy byte count */ 78 uint8_t he_destination; /* destination pool of this entropy */ 79 enum random_entropy_source he_source; /* origin of the entropy */ 80 void * he_next; /* next item on the list */ 81 }; 82 83 struct sysctl_ctx_list; 84 85 #define CTASSERT(x) _Static_assert(x, "compile-time assertion failed") 86 #define KASSERT(exp,msg) do { \ 87 if (!(exp)) { \ 88 printf msg; \ 89 exit(0); \ 90 } \ 91 } while (0) 92 93 #endif /* UNIT_TEST_H_INCLUDED */ 94