NAME    [Toc]    [Back]

       end, etext, edata - Defines the last location of a program

SYNOPSIS    [Toc]    [Back]

       extern end; extern etext; extern edata;

DESCRIPTION    [Toc]    [Back]

       The external names end, etext, and edata are  defined  for
       all  programs.   They  are  not functions, but identifiers
       associated with the following addresses: The first address
       following  the  program text.  The first address following
       the initialized data region.  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    [Toc]    [Back]

       Functions: brk(2), malloc(3)

       Commands: cc(1)



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