We only need the ELF loader for init, and possibly a few other modules. The bulk of loading executables is going to be done by userspace, so we only need the basics here.
Spent an embarrassing amount of time trying to figure out why there was a page fault with "reserved bits set". Turns out, I had set the NX bit without enabling it.
Without KVM, qemu inserts an invalid 12-GiB reserved entry at the end of the physical address space, making the kernel reserve way more space than necessary for the page bitmap (and overwriting the page directory pages).
