11/3/71 SYS BREAK (II)
NAME break -- set program break
SYNOPSIS sys break; addr / break = 17.
DESCRIPTION break sets the system's idea of the highest loca-
tion used by the program to addr. Locations
greater than addr and below the stack pointer are
not swapped and are thus liable to unexpected
modification.
If the argument is 0 or higher than the stack
pointer the entire 4K word user core area is
swapped.
When a program begins execution via exec the
break is set at the highest location defined by
the program and data storage areas. Ordinarily,
therefore, only programs with growing data areas
need to use break.
FILES --
SEE ALSO exec
DIAGNOSTICS none; strange addresses cause the break to be set
to include all of core.
BUGS --
OWNER ken, dmr