Hello,
I noticed that trace-status MI command reports incorrect start-time and 
stop-time, sometimes even negative. Investigation showed that gdbserver 
reports start-time and stop-time in decimal format, while gdb tries to 
interpret it as hex adn then broke it during type conversion. I think 
keeping decimal format for communication is useful because itis 
human-readable in remote log, so the attached patch fixes this problem 
on the gdb side.

Please consider applying it.

Thank you,
Dmitry