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END(3C)								       END(3C)

NAME
       end, _end, etext, _etext, edata, _edata - last locations in program

SYNOPSIS
       extern int _etext;

       extern int _edata;

       extern int _end;

DESCRIPTION
       These names refer neither to routines nor to locations with interesting
       contents; only their addresses are meaningful.

       _etext
		 The address of _etext is the first location  after  the  last
		 read-only loadable segment.

       _edata
		 The  address  of  _edata is the first location after the last
		 read-write loadable segment.

       _end
		 If the address of _edata  is  greater	than  the  address  of
		 _etext, the address of _end is same as the address of _edata.

		 If  the  address  of  _etext  is  greater than the address of
		 _edata, the address of _end is set to the page boundary after
		 the address pointed to by _etext.

USAGE
       When execution begins, the program break (the first location beyond the
       data) coincides with _end, but the program break can be	reset  by  the
       brk(2),	 malloc(3C),   and  the	 standard  input/output	 library  (see
       stdio(3C)), functions by the profile (-p) option of   cc,  and  so  on.
       Thus,  the  current  value of the program break should be determined by
       sbrk ((char *)0).

       References to end, etext, and edata,  without  a	 preceding  underscore
       will  be	 aliased  to the associated symbol that begins with the underÔÇÉ
       score.

SEE ALSO
       brk(2), malloc(3C), stdio(3C)

				 Mar 31, 2006			       END(3C)
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