// originally tried to generate it via unix/linux/types.go with "type
// fileHandle C.struct_file_handle" but that generated empty structs
// for mips64 and mips64le. Instead, hard code it for now (it's the
// same everywhere else) until the mips64 generator issue is fixed.
type fileHandle struct {
	Bytes uint32
	Type  int32
}

// FileHandle represents the C struct file_handle used by

}

func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
	if length <= 0 {
		return nil, EINVAL
	}

	// Set __MAP_64 by default
	flags |= __MAP_64

	// Map the requested memory.
	addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset)
	if errno != nil {
		return nil, errno
	}

	// Slice memory layout

		}
	case "386":
		return []string{"-m32"}
	case "arm":
		return []string{"-marm"} // not thumb
	case "s390":
		return []string{"-m31"}
	case "s390x":
		return []string{"-m64"}
	case "mips64", "mips64le":
		if gomips64 == "hardfloat" {
			return []string{"-mabi=64", "-mhard-float"}
		} else if gomips64 == "softfloat" {
			return []string{"-mabi=64", "-msoft-float"}
		}
	case "mips", "mipsle":

		return false
	}
	// Internally linking cgo is incomplete on some architectures.
	// https://golang.org/issue/10373
	// https://golang.org/issue/14449
	if goarch == "loong64" || goarch == "mips64" || goarch == "mips64le" || goarch == "mips" || goarch == "mipsle" || goarch == "riscv64" {
		return false
	}
	if goos == "aix" {
		// linkmode=internal isn't supported.
		return false
	}
	return true

		"amd64":   {"GOAMD64", "v1", "v2", "v3", "v4"},
		"arm":     {"GOARM", "5", "6", "7", "7,softfloat"},
		"arm64":   {"GOARM64", "v8.0", "v8.1"},
		"loong64": {},
		"mips":    {"GOMIPS", "hardfloat", "softfloat"},
		"mips64":  {"GOMIPS64", "hardfloat", "softfloat"},
		"ppc64":   {"GOPPC64", "power8", "power9", "power10"},
		"ppc64le": {"GOPPC64", "power8", "power9", "power10"},
		"ppc64x":  {}, // A pseudo-arch representing both ppc64 and ppc64le

		return sz <= 16 || (sz < 1024 && disjoint(dst, sz, src, sz))
	case "386", "arm64":
		return sz <= 8
	case "s390x", "ppc64", "ppc64le":
		return sz <= 8 || disjoint(dst, sz, src, sz)
	case "arm", "loong64", "mips", "mips64", "mipsle", "mips64le":
		return sz <= 4
	}
	return false
}
func IsInlinableMemmove(dst, src *Value, sz int64, c *Config) bool {
	return isInlinableMemmove(dst, src, sz, c)
}