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4aa8335612
The decoder API is now suitable to be made public. decoder.h is the sole entry point for the decoder and it has been moved to `include/` Signed-off-by: Ronald Caesar <github43132@proton.me>
82 lines
1.6 KiB
C
82 lines
1.6 KiB
C
#include "bal_decoder.h"
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#include <stdio.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <string.h>
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#include <stdint.h>
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#include <time.h>
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static uint32_t rng_state = 0x87654321;
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/*
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* Seeding function to set the initial state.
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*/
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static void
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fast_srand (uint32_t seed)
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{
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if (seed == 0)
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{
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seed = 0x87654321;
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}
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rng_state = seed;
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}
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/*
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* Xorshift32 Algorithm
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*/
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static inline uint32_t
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fast_rand (void)
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{
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uint32_t x = rng_state;
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x ^= x << 13;
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x ^= x >> 17;
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x ^= x << 5;
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rng_state = x;
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return x;
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}
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int
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main (void)
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{
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printf("Starting Decoder Fuzzer Test...\n");
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fast_srand((uint32_t)time(0));
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int failed = 0;
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int passed = 0;
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for (size_t i = 0; i < 10000000; ++i)
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{
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uint32_t random_instruction = fast_rand();
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const bal_decoder_instruction_metadata_t *meta
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= bal_decoder_arm64_decode(random_instruction);
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if (NULL != meta)
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{
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if ((random_instruction & meta->mask) != meta->expected)
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{
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printf("[FAIL] %s, 0x%08x & 0x%08x != 0x%08x",
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meta->name,
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random_instruction,
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meta->mask,
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meta->expected);
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++failed;
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continue;
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}
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++passed;
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}
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}
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if (failed > 0)
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{
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printf("FAILED %d tests. \n", failed);
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return 1;
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}
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if (passed > 0)
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{
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printf("Decoded %d instructions successfully\n", passed);
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return 0;
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}
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else
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{
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printf("[ERROR] No tests passed or failed. Ballistic's decoding logic is flawed\n");
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}
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}
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