[unix-history] / usr / src / man / man3 / end.3

.\"	@(#)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
.B extern end;
.B extern etext;
.B extern edata;
.fi
.SH DESCRIPTION
These names refer neither to routines nor to locations with interesting
contents.  The address of
.I etext
is the first address above the program text,
.I edata
above the initialized data region, and
.I end
above the uninitialized data region.
.PP
When execution begins, the program break coincides with
.I end,
but it is reset by the routines
.IR brk (2),
.IR malloc (3), 
standard input/output
.RI ( stdio (3S)),
the profile
.RB ( \-p )
option of 
.IR cc (1),
etc.
The current value of the program break is reliably returned by `sbrk(0)',
see
.IR brk (2).
.SH "SEE ALSO"
brk(2), malloc(3)
Commit	Line	Data
95f51977	1	.\" @(#)end.3 6.2 (Berkeley) 5/12/86
6f9bd087	2	.\"
95f51977	3	.TH END 3 "May 12, 1986"
6f9bd087 KM	4	.AT 3
	5	.SH NAME
	6	end, etext, edata \- last locations in program
	7	.SH SYNOPSIS
	8	.nf
	9	.B extern end;
	10	.B extern etext;
	11	.B extern edata;
	12	.fi
	13	.SH DESCRIPTION
23857c04 KM	14	These names refer neither to routines nor to locations with interesting
23857c04 KM	15	contents. The address of
6f9bd087 KM	16	.I etext
	17	is the first address above the program text,
	18	.I edata
	19	above the initialized data region, and
	20	.I end
	21	above the uninitialized data region.
	22	.PP
23857c04	23	When execution begins, the program break coincides with
6f9bd087	24	.I end,
23857c04	25	but it is reset by the routines
6f9bd087 KM	26	.IR brk (2),
	27	.IR malloc (3),
	28	standard input/output
a546532c	29	.RI ( stdio (3S)),
6f9bd087 KM	30	the profile
	31	.RB ( \-p )
	32	option of
	33	.IR cc (1),
	34	etc.
23857c04	35	The current value of the program break is reliably returned by `sbrk(0)',
6f9bd087 KM	36	see
	37	.IR brk (2).
	38	.SH "SEE ALSO"
	39	brk(2), malloc(3)