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end(5)
NAME
  end, etext, edata - Defines the last location of a program

SYNOPSIS
  extern end;
  extern etext;
  extern edata;



DESCRIPTION
  The external names end, etext, and edata are defined for all programs.
  They are not functions, but identifiers associated with the following
  addresses:

  etext
      The first address following the program text.

  edata
      The first address following the initialized data region.

  end The first address following the data region that is not initialized.

  The break value of the program is the first location beyond the data.	 When
  a program begins running, this location coincides with end.  However, many
  factors can change the break value, including:

    ·  The brk() function

    ·  The malloc() function

    ·  The standard I/O functions

    ·  The -p flag on the cc command

  Therefore, use sbrk(0), not end, to determine the break value of the
  program.

SEE ALSO
  Functions: brk(2), malloc(3)

  Commands: cc(1)