elf_loader

This repo just has a tiny generic-ish ELF loader written entirely in Nim.

It doesn't aim to replace glibc's dlfcn entirely, rather just act as a generic loader for various different ELF variants on the same system (e.g loading a Bionic-compiled shared object on desktop GNU/Linux), regardless of compatibility, though this'll probably require a lot more work.

It does not depend on C library functions, but its underlying code (like the Nim runtime and external dependencies) do. That's a long-term goal to fix.

roadmap

• map segments and stuff
• open glibc
• perform enough relocations to make it happy
• call .init_array
• basic calls like _exit work (calls that reach into glibc's internal state either don't work, or end up deadlocking, say, if they try messing with a futex)
• some calls like open work, but crash and/or cause UB if they try setting errno (probably TLS work is required)
• loading bionic shared objects on glibc linux
• Proper TLS initialization (glibc-style)