| Rev | Line | |
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| [9] | 1 | .\" @(#)end.3 6.2 (Berkeley) 5/12/86
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| 2 | .\"
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| 3 | .TH END 3 "May 12, 1986"
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| 4 | .AT 3
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| 5 | .SH NAME
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| 6 | end, etext, edata \- last locations in program
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| 7 | .SH SYNOPSIS
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| 8 | .nf
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| 9 | .ft B
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| 10 | extern int etext;
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| 11 | extern int edata;
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| 12 | extern int end, _end;
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| 13 | .ft R
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| 14 | .fi
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| 15 | .SH DESCRIPTION
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| 16 | These names refer neither to routines nor to locations with interesting
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| 17 | contents. The address of
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| 18 | .B etext
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| 19 | is the first address above the program text,
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| 20 | .B edata
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| 21 | above the initialized data region, and
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| 22 | .B end
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| 23 | above the uninitialized data region.
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| 24 | .B _end
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| 25 | is the same as
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| 26 | .BR end ,
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| 27 | but in the implementers name space, i.e. for use in libraries.
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| 28 | .PP
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| 29 | When execution begins, the program break coincides with
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| 30 | .BR end ,
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| 31 | but it is reset by the routines
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| 32 | .BR brk (2),
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| 33 | .BR malloc (3),
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| 34 | standard input/output
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| 35 | .RB ( stdio (3)),
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| 36 | etc.
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| 37 | The current value of the program break is reliably returned by `sbrk(0)',
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| 38 | see
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| 39 | .BR brk (2).
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| 40 | .SH "SEE ALSO"
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| 41 | .BR brk (2),
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| 42 | .BR malloc (3).
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