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