nx_elf_writer.nx

nx_elf_writer.nx -- sovereign ELF64 binary writer. Pure NishiLang. Takes an exit-code integer; writes a complete static-linked x86_64 ELF binary to a file descriptor. No as. No ld. No gcc. No libc. The output is bytes that Linux execve loads and runs. Today: smallest credible binary -- `_start: mov rdi, N; mov rax, 231; syscall` (exit_group with code N). Total ELF size: 134 bytes. Tomorrow (L19b): take an IR snapshot (nxc2 --target ir > foo.ir), read it, emit the corresponding x86_64 bytes. That closes the "nxc2 emits ELF directly" loop without adding more C to nxc2. Cardinal alignment: feedback-nishilang-mission-displace-cuda-directx-via-patent-clean- absorption: every new substrate file is .nx. This file replaces the temptation to add an ELF emitter to x86_64.c. genealogy_id: elf_specification_v1_2 + linux_kernel_load_elf + sysv_abi lineage_id: sovereign_elf_emit_q10