🚀 go-pugleaf

Dunno about yours, my compiler does all sorts of housekeeping
and command line parsing before calling main:.  The return from
main: falls into exit: and sets errno, closes open files and
then gracefully quits.  Returning from main() and calling exit()
have the same effect.  From main(), 'return 0;' and 'exit(0);'
are identical.  exit() is a function call and its argument is
stacked.  The exit() routine itself ignores the stack and takes
its argument from a register as if 'return' was encountered or
main() simply fell to the closing '}' brace.  exit() resets the
stack pointer as it was when the program was first executed.

-- 
Joe Wright  alpha@waggen.twuug.com