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| author | Andrea Fioraldi <andreafioraldi@gmail.com> | 2019-08-27 21:10:51 +0200 |
|---|---|---|
| committer | Andrea Fioraldi <andreafioraldi@gmail.com> | 2019-08-27 21:10:51 +0200 |
| commit | c5e0b29a22a126a90942fd31a85fcfe8486fa67c (patch) | |
| tree | a5422ba34ef88274169e933731404e0fa8e0b4cd /unicorn_mode/patches | |
| parent | bec9b307db299b586c2574031d3cc1a491dc00c3 (diff) | |
| download | afl++-c5e0b29a22a126a90942fd31a85fcfe8486fa67c.tar.gz | |
neverzero for unicorn_mode
Diffstat (limited to 'unicorn_mode/patches')
| -rw-r--r-- | unicorn_mode/patches/afl-unicorn-cpu-inl.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/unicorn_mode/patches/afl-unicorn-cpu-inl.h b/unicorn_mode/patches/afl-unicorn-cpu-inl.h index 892c3f72..ed422725 100644 --- a/unicorn_mode/patches/afl-unicorn-cpu-inl.h +++ b/unicorn_mode/patches/afl-unicorn-cpu-inl.h @@ -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; } |