D173 - The module now carries a DT_INIT, because a loader may call one and ours pointed at the ELF header

obSCEne's module had no DT_INIT in 1,426 dynamic tags. It is linked with a stock ld and a linker script, and neither has any reason to emit one.

Kyty calls it, and does not check it exists:

// RuntimeLinker.cpp:1041 — StartModule
return run_ini_fini(program->dynamic_info->init_vaddr + program->base_vaddr, …);

// RuntimeLinker.cpp:93 — no guard
return reinterpret_cast<module_ini_fini_func_t>(addr)(args, argp, func);

With no tag, init_vaddr is zero, so Kyty calls base_vaddr + 0 and executes the ELF header - \x7fELF as machine code. That is the access violation at base + 2 this module produced there, and the reason obSCEne has never run on Kyty.

Every other loader declines to call it, and each says why

PS5PCEM's reason is the interesting one: "The executable's PS5 CRT entry calls its own DT_INIT routine. Calling that routine here as well runs global constructors twice."

So the console's own CRT is reported to call it. That is the argument for emitting one - not to satisfy Kyty, but because a module without it is a fault this project would otherwise meet first on hardware, where an iteration costs a manual copy rather than a rebuild.

Empty, and deliberately

obs_module_init returns zero and does nothing. The suite runs from the entry point, which is what every working loader calls; an initialiser that did work as well would do it twice wherever both are called. This exists so a loader that calls DT_INIT reaches a ret rather than the ELF header.

Omitted rather than zeroed

mkmodule looks the symbol up in .symtab and emits no tag when it is absent. A DT_INIT of zero is worse than none, because it is exactly what a loader that does not check will call - the fault this is fixing, reintroduced by the fix.

Measured, not assumed

Kyty still emits no report, which is a separate question and may finally be what D080 describes - but D080's reasoning could never have been tested before, because the module never reached the point where an output channel mattered.