You can use thunks/trampolines. lld can make them for some architectures, presumably also for x86_64. Though I don't know why it didn't in your case.
But, like the large code model it can be expensive to add trampolines, both in icache performance and just execution if a trampoline is in a particularly hot path.
This is what my next post will explore. I ran into some issues with the GOT that I'll have to explore solutions for.
I'm writing this for myself mostly. The whole idea for code models when you have thunks feels unnecessary.
Does the linker have access to the same hotness information that the compiler uses during PGO? Well -- presumably it could, even if it doesn't now. But it would be like a heuristic with a hotness threshold? Do linkers "do" heuristics?