1end(3C)                  Standard C Library Functions                  end(3C)
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NAME

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

9       extern int _etext;
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12       extern int _edata;
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15       extern int _end;
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DESCRIPTION

19       These names refer neither to routines nor to locations with interesting
20       contents; only their addresses are meaningful.
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22       _etext    The address of _etext is the first location  after  the  last
23                 read-only loadable segment.
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26       _edata    The  address  of  _edata is the first location after the last
27                 read-write loadable segment.
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30       _end      If the address of _edata  is  greater  than  the  address  of
31                 _etext, the address of _end is same as the address of _edata.
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33                 If  the  address  of  _etext  is  greater than the address of
34                 _edata, the address of _end is set to the page boundary after
35                 the address pointed to by _etext.
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USAGE

39       When execution begins, the program break (the first location beyond the
40       data) coincides with _end, but the program break can be  reset  by  the
41       brk(2),   malloc(3C),   and  the  standard  input/output  library  (see
42       stdio(3C)), functions by the profile (-p) option of   cc,  and  so  on.
43       Thus,  the  current  value of the program break should be determined by
44       sbrk ((char *)0).
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47       References to end, etext, and edata,  without  a  preceding  underscore
48       will  be  aliased  to the associated symbol that begins with the under‐
49       score.
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SEE ALSO

52       brk(2), malloc(3C), stdio(3C)
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56SunOS 5.11                        31 Mar 2006                          end(3C)