nExtReloc++

				// set up addend for eventual relocation via outer symbol.
				rs := rs
				rs, off := FoldSubSymbolOffset(ldr, rs)
				xadd := r.Add() + off
				rst := ldr.SymType(rs)
				if rst != sym.SHOSTOBJ && rst != sym.SDYNIMPORT && rst != sym.SUNDEFEXT && ldr.SymSect(rs) == nil {
					st.err.Errorf(s, "missing section for relocation target %s", ldr.SymName(rs))
				}

				o = xadd
				if target.IsElf() {

			objabi.R_ADDRARM64:

			// set up addend for eventual relocation via outer symbol.
			rs, off := ld.FoldSubSymbolOffset(ldr, rs)
			xadd := r.Add() + off
			rst := ldr.SymType(rs)
			if rst != sym.SHOSTOBJ && rst != sym.SDYNIMPORT && ldr.SymSect(rs) == nil {
				ldr.Errorf(s, "missing section for %s", ldr.SymName(rs))
			}

			nExtReloc = 2 // need two ELF/Mach-O relocations. see elfreloc1/machoreloc1