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 27 28 #ifndef UNIT_TEST_H_INCLUDED 29 #define UNIT_TEST_H_INCLUDED 30 31 #ifdef _KERNEL 32 #error "Random unit tests cannot be compiled into the kernel." 33 #endif 34 35 #include <sys/types.h> 36 #include <inttypes.h> 37 #include <stdint.h> 38 39 #if defined(clang) && __has_builtin(__builtin_readcyclecounter) 40 #define rdtsc __builtin_readcyclecounter 41 #else /* !clang */ 42 #if defined(__amd64__) || defined(__i386__) 43 static __inline uint64_t 44 rdtsc(void) 45 { 46 uint32_t low, high; 47 48 __asm __volatile("rdtsc" : "=a" (low), "=d" (high)); 49 return (low | ((uint64_t)high << 32)); 50 } 51 #else /* __amd64__ || __i386__ */ 52 #error "No rdtsc() implementation available." 53 #endif /* __amd64__ || __i386__ */ 54 #endif /* !clang */ 55 56 static __inline uint64_t 57 get_cyclecount(void) 58 { 59 60 return (rdtsc()); 61 } 62 63 #define HARVESTSIZE 2 64 #define RANDOM_BLOCKSIZE 16 65 66 enum random_entropy_source { 67 RANDOM_START = 0, 68 RANDOM_CACHED = 0, 69 ENTROPYSOURCE = 32 70 }; 71 72 struct harvest_event { 73 uintmax_t he_somecounter; /* fast counter for clock jitter */ 74 uint32_t he_entropy[HARVESTSIZE];/* some harvested entropy */ 75 uint8_t he_size; /* harvested entropy byte count */ 76 uint8_t he_destination; /* destination pool of this entropy */ 77 enum random_entropy_source he_source; /* origin of the entropy */ 78 void * he_next; /* next item on the list */ 79 }; 80 81 struct sysctl_ctx_list; 82 83 #define CTASSERT(x) _Static_assert(x, "compile-time assertion failed") 84 #define KASSERT(exp,msg) do { \ 85 if (!(exp)) { \ 86 printf msg; \ 87 exit(0); \ 88 } \ 89 } while (0) 90 91 #endif /* UNIT_TEST_H_INCLUDED */ 92