// specific work like setting up the elf headers/dynamic relocations, etc.
	// The phases are called "Asmb" and "Asmb2". Asmb2 needs to be defined for
	// every architecture, but only if architecture has an Asmb function will
	// it be used for assembly.  Otherwise a generic assembly Asmb function is
	// used.
	Asmb  func(*Link, *loader.Loader)
	Asmb2 func(*Link, *loader.Loader)

	AADDC
	AADDE
	AADDW
	ADIVW
	ADIVWU
	ADIVD
	ADIVDU
	AMODW
	AMODWU
	AMODD
	AMODDU
	AMULLW
	AMULLD
	AMULHD
	AMULHDU
	AMLGR
	ASUB
	ASUBC
	ASUBV
	ASUBE
	ASUBW
	ANEG
	ANEGW

	// integer moves
	AMOVWBR
	AMOVB
	AMOVBZ
	AMOVH
	AMOVHBR
	AMOVHZ
	AMOVW
	AMOVWZ
	AMOVD
	AMOVDBR

	// conditional moves
	AMOVDEQ

	"openbsd":   true,
	"solaris":   true,
}

var KnownArch = map[string]bool{
	"386":         true,
	"amd64":       true,
	"amd64p32":    true, // legacy; don't remove
	"arm":         true,
	"armbe":       true,
	"arm64":       true,
	"arm64be":     true,
	"ppc64":       true,
	"ppc64le":     true,
	"mips":        true,
	"mipsle":      true,
	"mips64":      true,
	"mips64le":    true,

			opset(AADDMEV, r0)
			opset(AADDMEVCC, r0)
			opset(AADDZE, r0)
			opset(AADDZECC, r0)
			opset(AADDZEV, r0)
			opset(AADDZEVCC, r0)
			opset(ASUBME, r0)
			opset(ASUBMECC, r0)
			opset(ASUBMEV, r0)
			opset(ASUBMEVCC, r0)
			opset(ASUBZE, r0)
			opset(ASUBZECC, r0)
			opset(ASUBZEV, r0)
			opset(ASUBZEVCC, r0)

		case AADDC:
			opset(AADDCCC, r0)

		case ABEQ:

	// that was profiled. E.g. an amd64 host can profile a 386 program.
	switch runtime.GOARCH {
	case "386":
		arch = macho.Cpu386
	case "amd64", "amd64p32":
		arch = macho.CpuAmd64
	case "arm", "armbe", "arm64", "arm64be":
		arch = macho.CpuArm
	case "ppc":
		arch = macho.CpuPpc
	case "ppc64", "ppc64le":
		arch = macho.CpuPpc64
	default:

			// statically in the 'reloc' phase, or externally
			// linking, in which case the relocation will be
			// prepared in the 'reloc' phase and passed to the
			// external linker in the 'asmb' phase.
			if ldr.SymType(s) != sym.SDATA && ldr.SymType(s) != sym.SRODATA {
				break
			}
		}

		if target.IsElf() {
			// Generate R_X86_64_RELATIVE relocations for best

					p.Mark |= LABEL | SYNC
				}
			}

		case ALWAR,
			ALBAR,
			ASTBCCC,
			ASTWCCC,
			AEIEIO,
			AICBI,
			AISYNC,
			ATLBIE,
			ATLBIEL,
			ASLBIA,
			ASLBIE,
			ASLBMFEE,
			ASLBMFEV,
			ASLBMTE,
			ADCBF,
			ADCBI,
			ADCBST,
			ADCBT,
			ADCBTST,
			ADCBZ,
			ASYNC,
			ATLBSYNC,
			APTESYNC,
			ALWSYNC,
			ATW,
			AWORD,

			opset(ARISBGNZ, r)
			opset(ARISBHG, r)
			opset(ARISBLG, r)
			opset(ARISBHGZ, r)
			opset(ARISBLGZ, r)
		case ACSG:
			opset(ACS, r)
		case ASUB:
			opset(ASUBC, r)
			opset(ASUBE, r)
			opset(ASUBW, r)
		case ANEG:
			opset(ANEGW, r)
		case AFMOVD:
			opset(AFMOVS, r)
		case AMOVDBR:
			opset(AMOVWBR, r)
		case ACMP:
			opset(ACMPW, r)
		case ACMPU:

	case "archive":
		return true

	case "c-archive":
		switch goos {
		case "aix", "darwin", "ios", "windows":
			return true
		case "linux":
			switch goarch {
			case "386", "amd64", "arm", "armbe", "arm64", "arm64be", "loong64", "ppc64le", "riscv64", "s390x":
				// linux/ppc64 not supported because it does
				// not support external linking mode yet.
				return true
			default:

			// statically in the 'reloc' phase, or externally
			// linking, in which case the relocation will be
			// prepared in the 'reloc' phase and passed to the
			// external linker in the 'asmb' phase.
			if ldr.SymType(s) != sym.SDATA && ldr.SymType(s) != sym.SRODATA {
				break
			}
		}

		if target.IsElf() {
			// Generate R_AARCH64_RELATIVE relocations for best