man(1) Manual page archive

     END(3)                                                     END(3)

          end, etext, edata - last locations in program

          extern end;
          extern etext;
          extern edata;

          These names refer neither to routines nor to locations with
          interesting contents.  The address of etext is the first
          address above the program text, edata above the initialized
          data region, and end above the uninitialized data region.

          When execution begins, the program break coincides with end,
          but it is reset by the routines brk(2), malloc(3), standard
          input/output (stdio(3)), the profile (-p) option of cc(1),
          etc.  The current value of the program break is reliably
          returned by `sbrk(0)', see brk(2).

          brk(2), malloc(3)