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neverzero for unicorn_mode

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This commit is contained in:
Andrea Fioraldi
2019-08-27 21:10:51 +02:00
parent bec9b307db
commit c5e0b29a22
3 changed files with 17 additions and 3 deletions
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16
unicorn_mode/patches/afl-unicorn-cpu-inl.h
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@ -241,7 +241,21 @@ static inline void afl_maybe_log(unsigned long cur_loc) {
// DEBUG
//printf("cur_loc = 0x%lx\n", cur_loc);
afl_area_ptr[cur_loc ^ prev_loc]++;
register uintptr_t afl_idx = cur_loc ^ prev_loc;
#if (defined(__x86_64__) || defined(__i386__)) && defined(AFL_QEMU_NOT_ZERO)
asm volatile (
"incb (%0, %1, 1)\n"
"seto %%al\n"
"addb %%al, (%0, %1, 1)\n"
: /* no out */
: "r" (afl_area_ptr), "r" (afl_idx)
: "memory", "eax"
);
#else
afl_area_ptr[afl_idx]++;
#endif
prev_loc = cur_loc >> 1;
}