The --extlib and --extension features require runtime dynamic linking
of externally compiled libraries. Spike main must make all symbols
of libriscv available for those libraries.
the tool can parse the instruction name from spike debug log to help
dsp kernel designer check what instructions have been used
Signed-off-by: Jerry Shih <bignose1007@gmail.com>
rdcycle/rdinstret now have single-instruction granularity. Questionable
behavior when timer interrupts occurred around the same time as the compare
register is written should be fixed.