etext(5) [osf1 man page]

end(5)								File Formats Manual							    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 follow-
       ing 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

       Functions: brk(2), malloc(3)

       Commands: cc(1)

																	    end(5)

end(3C) 						   Standard C Library Functions 						   end(3C)

NAME

       end, _end, etext, _etext, edata, _edata - last locations in program

SYNOPSIS

       extern int _etext;

       extern int _edata;

       extern int _end;

DESCRIPTION

       These names refer neither to routines nor to locations with interesting contents; only their addresses are meaningful.

       _etext	       The address of _etext is the first location after the program text.

       _edata	       The address of _edata is the first location after the initialized data region.

       _end	       The address of _end is the first location after the uninitialized data region.

USAGE

       When  execution	begins,  the program break (the first location beyond the data) coincides with _end, but the program break may be reset by
       the  brk(2), malloc(3C), and the standard input/output library (see stdio(3C)), functions by the profile (-p) option of	cc(1B), and so on.
       Thus, the current value of the program break should be determined by sbrk ((char *)0).

       References  to  end,  etext, and edata, without a preceding underscore will be aliased to the associated symbol that begins with the under-
       score.

SEE ALSO

       cc(1B), brk(2), malloc(3C), stdio(3C)

SunOS 5.10							    1 Sep 2003								   end(3C)