unit_test.h

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    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 */

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FreeBSD/Linux Kernel Cross Reference sys/dev/random/unit_test.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/random/unit_test.h