func archrelocvariant(*ld.Target, *loader.Loader, loader.Reloc, sym.RelocVariant, loader.Sym, int64, []byte) int64 {
	log.Fatalf("archrelocvariant")
	return -1
}

func extreloc(target *ld.Target, ldr *loader.Loader, r loader.Reloc, s loader.Sym) (loader.ExtReloc, bool) {
	switch r.Type() {
	case objabi.R_RISCV_JAL, objabi.R_RISCV_JAL_TRAMP:
		return ld.ExtrelocSimple(ldr, r), true

				}
			}

			return val, nExtReloc, isOk

		case objabi.R_CALLARM64:
			nExtReloc = 1
			return val, nExtReloc, isOk

		case objabi.R_ARM64_TLS_LE:
			nExtReloc = 1
			return val, nExtReloc, isOk

		case objabi.R_ARM64_TLS_IE:
			nExtReloc = 2 // need two ELF relocations. see elfreloc1
			return val, nExtReloc, isOk

		case objabi.R_ADDR:

		}

		// Compute external relocations on the go, and pass to Machoreloc1
		// to stream out.
		relocs := ldr.Relocs(s)
		for ri := 0; ri < relocs.Count(); ri++ {
			r := relocs.At(ri)
			rr, ok := extreloc(ctxt, ldr, s, r)
			if !ok {
				continue
			}
			if rr.Xsym == 0 {
				ldr.Errorf(s, "missing xsym in relocation")
				continue
			}
			if !ldr.AttrReachable(rr.Xsym) {

		case macho.LoadCmdDysymtab:
			err = machoUpdateLoadCommand(reader, linkseg, linkoffset, &macho.DysymtabCmd{}, "Tocoffset", "Modtaboff", "Extrefsymoff", "Indirectsymoff", "Extreloff", "Locreloff")
		case LC_CODE_SIGNATURE, LC_SEGMENT_SPLIT_INFO, LC_FUNCTION_STARTS, LC_DATA_IN_CODE, LC_DYLIB_CODE_SIGN_DRS,
			LC_DYLD_EXPORTS_TRIE, LC_DYLD_CHAINED_FIXUPS: