END(3-SysV)         RISC/os Reference Manual          END(3-SysV)



NAME
     end, etext, edata - last locations in program
     eprol, _ftext, _fdata, _fbss - first locations in program
     _procedure_table, _procedure_table_size,
     _procedure_string_table - runtime procedure table

SYNOPSIS
     #include <syms.h>
     extern END;
     extern ETEXT;
     extern EDATA;
     extern eprol;
     extern FTEXT;
     extern FDATA;
     extern FBSS;
     extern PROCEDURETABLE;
     extern PROCEDURETABLESIZE;
     extern PROCEDURESTRINGTABLE;

DESCRIPTION
     These names refer neither to routines nor to locations with
     interesting contents except for PROCEDURETABLE and
     PROCEDURESTRINGTABLE. Except for eprol these are all
     names of loader defined symbols.  The address of ETEXT is
     the first address above the program text, EDATA is above
     the initialized data region, END is above the uninitialized
     data region, and eprol is the first instruction of the
     user's program that follows the runtime startup routine.

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

     The loader defined symbols PROCEDURETABLE,
     PROCEDURETABLESIZE and PROCEDURESTRINGTABLE refer to
     the data structures of the runtime procedure table.  Since
     these are loader defined symbols the data structures are
     build by ld(1) only if they are referenced.  See the include
     file <sym.h> for the definition of the runtime procedure
     table and see the include file <exception.h> for its uses.

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










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