NAME

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

SYNOPSIS

extern _etext;

extern _edata;
extern _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.

SEE ALSO

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

NOTE

When execution begins, the program break (the first location beyond the data) coincides with _end, but the program break may be reset by the routines brk( ), malloc( ), the standard input/output library (see stdio(3S)), 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) (see brk(2)).

References to end, etext, and edata, without a preceding underscore can be made by the user; if this case is detected the symbol will be aliased to the associated symbol which begins with the underscore.