nx_nxasm_main.nx

nxasm_main.nx -- CLI driver for nxasm_v2 + elf_writer. Usage: nxasm <input.s> > <output.elf> Reads input.s via sys_read_file, assembles to RV64 machine bytes via nxasm_v2.assemble(), wraps in a static Linux ELF via elf_writer.write_elf(), writes to stdout. Single-step asm+link. For programs whose entire link is a single .s file (the common case for nxc.nx output today), this replaces the entire `gcc-as + ld` chain in verify.sh. Exit codes: 0 success 1 no args 2 read failed 3 assemble failed (negative byte count) 4 write failed Together with nxld_main (which handles multi-object link), these two tools cover every gcc-as + ld invocation we need.