🚀 go-pugleaf

I'm trying to use the sunOS shared library system to get dynamic
linking to work with g++.  The basic operation works fine, but
static con(de)structors need to be called in the loaded code to
no surprise.  My attempt was to use the code from crt0, like this:

    typedef void (*func_ptr)();
    extern func_ptr __CTOR_LIST__[];
    func_ptr *p;
    for (p = __CTOR_LIST__ + 1; *p;) {
        (*p++) ();
    }

This should step through the array of function pointers placed in
__CTOR_LIST__ + 4  by the `collect2' program.

The problem is that the __CTOR_LIST__ I bind to is the one from
the *main* executable, not the dynamically loaded image.  This is strange,
given that the shared library shows only a defined __CTOR_LIST__, not an
undefined one, so presumably no further binding of that symbol would
occur.  I have verified that it does using gdb to look at the address
and contents of __CTOR_LIST__ in the loaded image *after* it has been
dynamically loaded.  Running `nm' on the shared library shows only the 
defined symbol.

Here's the makefile, which describes how I build the main program
and the part to be loaded:

prog: main.o
        g++-2.2.2 -o prog main.o -ldl -lg++-2_1

main.o: main.cc
        g++-2.2.2 -c -o main.o main.cc

lib.so.1.1: lib.o
        gcc-lib/sun4/2.2.2/ld -o lib.so.1.1 lib.o

lib.o: lib.cc
        g++-2.2.2 -fpic -c -o lib.o lib.cc

(The main program loads the file "lib.so.1.1" via the `dl' library
functions.)

So my questions are:
    (1) Why is this happening?
    (2) Has anyone gotten dynamic linking to work in a similar fashion?
    (3) What else lurks in this pool to bite me?

I should mention that if I call the magic functions (the compiler-generated
thunks of the form _GLOBAL$I$name and _GLOBAL$D$name) manually, all is
well and the loaded code's static con(de)structors are fine.  But a better
method than that should be possible.

Please respond via e-mail; I will post any solutions found if people
register interest in the problem.

-Tim Wagner
UC Berkeley CS Department
508-9 Evans
twagner@CS.Berkeley.EDU