END(3C)             UNIX Programmer's Manual              END(3C)

NAME
     end, etext, edata - last locations in program

SYNOPSIS
     extern char end;
     extern char etext;
     extern char edata;

HP-UX COMPATIBILITY
     Level:    HP-UX/RUN ONLY

     Origin:   System III

DESCRIPTION
     These names refer neither to routines nor to locations  with
     interesting  contents.   The  address  of _e_t_e_x_t is the first
     address above the program text, _e_d_a_t_a above the  initialized
     data  region,  and  _e_n_d above the uninitialized data region.
     Note   that   the   definition   of   each   of   these   is
     implementation-dependent.  See _H_A_R_D_W_A_R_E _D_E_P_E_N_D_E_N_C_I_E_S below.

     When execution begins, the program break coincides with _e_n_d,
     but  the  program  break  may  be  reset  by the routines of
     _b_r_k(2), _m_a_l_l_o_c(3C), standard input/output  (_s_t_d_i_o(3S)),  the
     profile  (-p) option of _c_c(1), and so on.  Thus, the current
     value of the program break should be determined by "sbrk(0)"
     (see _b_r_k(2)).

     These symbols are accessible from assembly language provided
     you  prefix  them  with  an  underscore  (i.e. __e_n_d, __e_t_e_x_t,
     __e_d_a_t_a).

HARDWARE DEPENDENCIES
     Series 500:
          _E_n_d is the lowest heap address available to  the  user.
          _E_t_e_x_t  is  the  lowest  available address in the D-data
          segment.  _E_d_a_t_a is the first available address  in  the
          I-data area.

          Use _m_e_m_a_l_l_c(2) instead of _m_a_l_l_o_c(3C) to set the program
          break.

          In C, these names must look like addresses.  Thus,  you
          would  write  &end instead of end to access the current
          value of _e_n_d.

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