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
rdtsc(void)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
get_cyclecount(void)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