Two things are happening:
1)	function entry point histograms.
2)	program counter sampling.

Parts required:
	mcrt0  --  linked instead of crt0.
	mcount -- function the does the counting
	monitor -- function that arranges for the profile and writes out results
	profil -- syscall interface for pc sampling
	addupc -- keep pc samples
	prof -- C program that prints mon.out
