| // Recursion depth should be equal or greater than the RSB size, but not |
| // excessively high because of the possibility of stack overflow. |
| constexpr size_t kRecursionDepth = 64; |
| |
| // Modular function pointers that provide different functionality in the |
| // same-address-space and cross-address-space version. We use this design, |
| // because the same-address-space version works everywhere including on systems |
| // that do not allow forced pinning of processes to cores (e.g. MacOS), the |
| // cross-address-space version is Linux only. |
| extern void (*return_true_base_case)(); |
| extern void (*return_false_base_case)(); |
| |
| // Global variables used to avoid passing parameters through recursive function |
| // calls. Since we flush whole stack frames from the cache, it is important not |
| // to store on stack any data that might be affected by being flushed from |
| // cache. |
| extern size_t current_offset; |
| extern const std::array<BigByte, 256> *oracle_ptr; |
| |
| bool ReturnsFalse(int counter); |
| char Ret2specLeakByte(); |
