One could always use ``caddr_t'', which is what the Berkeley <sys/types.h> defines for ``core address type''. -- In-Real-Life: Chris Torek, Univ of MD Comp Sci (301) 454-7690 UUCP: {seismo,allegra,brl-bmd}!umcp-cs!chris CSNet: chris at umcp-cs ARPA: chris at maryland