Description :
Implement the execution routines for constructor and
destructor functions.

The ctors and dtors are constructor and destructor initialization functions.
Following GCC, these are data sections containing function pointers.
The sections are sorted into a order which allows for the relative ordering
of the functions.

The following is a sample linker map, illustrating the sections:
---------------------------------------------------------------------
.ctors 00106284 00000020
.ctors 00106284 00000004 ctordtor.o
__CTOR_LIST__ 00106284 00000004
.ctors 00106288 00000004 test2.o
.ctors.00050 0010628c 00000004 test2.o
.ctors.65202 00106290 00000004 test2a.o
.ctors.65435 00106294 00000004 test2.o
.ctors.65461 00106298 00000004 test2.o
.ctors.65532 0010629c 00000004 test2a.o
.ctors.65536 001062a0 00000004 ctordtor.o
__CTOR_END__ 001062a0 00000004
----------------------------------------------------------------------