43 lines
888 B
Groff
43 lines
888 B
Groff
.\" @(#)end.3 6.2 (Berkeley) 5/12/86
|
|
.\"
|
|
.TH END 3 "May 12, 1986"
|
|
.AT 3
|
|
.SH NAME
|
|
end, etext, edata \- last locations in program
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.ft B
|
|
extern int etext;
|
|
extern int edata;
|
|
extern int end, _end;
|
|
.ft R
|
|
.fi
|
|
.SH DESCRIPTION
|
|
These names refer neither to routines nor to locations with interesting
|
|
contents. The address of
|
|
.B etext
|
|
is the first address above the program text,
|
|
.B edata
|
|
above the initialized data region, and
|
|
.B end
|
|
above the uninitialized data region.
|
|
.B _end
|
|
is the same as
|
|
.BR end ,
|
|
but in the implementers name space, i.e. for use in libraries.
|
|
.PP
|
|
When execution begins, the program break coincides with
|
|
.BR end ,
|
|
but it is reset by the routines
|
|
.BR brk (2),
|
|
.BR malloc (3),
|
|
standard input/output
|
|
.RB ( stdio (3)),
|
|
etc.
|
|
The current value of the program break is reliably returned by `sbrk(0)',
|
|
see
|
|
.BR brk (2).
|
|
.SH "SEE ALSO"
|
|
.BR brk (2),
|
|
.BR malloc (3).
|