Implement dynamic loader (dlopen, dlsym, dlclose)

[pbalduino]

Goal

Add dynamic linking support to load shared libraries at runtime.

Context

No dynamic loader exists. All programs are statically linked.

Definition of Done

• [ ] dlopen() - Load shared library
• [ ] dlsym() - Resolve symbol
• [ ] dlclose() - Unload library
• [ ] dlerror() - Get error string
• [ ] ELF shared library format support
• [ ] Relocation processing
• [ ] Symbol resolution and binding
• [ ] Lazy binding support
• [ ] Library search paths (LD_LIBRARY_PATH)

Dependencies

Required

• #193 - Minimal libc ✅
• ELF loader enhancements

Priority

Low - Future work

Estimated Time

16+ weeks part-time (substantial kernel work)