Change meaning of get_processor_timestamp

Now let it return 0 if we have no hardware timestamp, and add
OS::get_high_resolution_clock for best available clock.

This is mainly because it's confusing for get_processor_timestamp to return
something that is not a processor timestamp and because it simplifies adding
cycles/byte output if we know that something is or is not a cycle counter.

Also adds Windows SEH version of run_cpu_instruction_probe. Untested, uncompiled.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/rng/stateful_rng/stateful_rng.cpp b/src/lib/rng/stateful_rng/stateful_rng.cpp
index 81fe89cca..df33a2f54 100644
--- a/src/lib/rng/stateful_rng/stateful_rng.cpp
+++ b/src/lib/rng/stateful_rng/stateful_rng.cpp
@@ -40,7 +40,7 @@ void Stateful_RNG::randomize_with_ts_input(uint8_t output[], size_t output_len)
    {
    uint8_t additional_input[24] = { 0 };
    store_le(OS::get_system_timestamp_ns(), additional_input);
-   store_le(OS::get_processor_timestamp(), additional_input + 8);
+   store_le(OS::get_high_resolution_clock(), additional_input + 8);
    store_le(m_last_pid, additional_input + 16);
    store_le(static_cast<uint32_t>(m_reseed_counter), additional_input + 20);