diff -r e77dad242f4c -r 2a9ec03fe5a1 vendor/golang.org/x/sys/unix/syscall_linux_s390x.go
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/golang.org/x/sys/unix/syscall_linux_s390x.go	Sat Sep 29 18:09:54 2018 +0200
@@ -0,0 +1,324 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build s390x,linux
+
+package unix
+
+import (
+	"unsafe"
+)
+
+//sys	Dup2(oldfd int, newfd int) (err error)
+//sysnb	EpollCreate(size int) (fd int, err error)
+//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
+//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
+//sys	Fchown(fd int, uid int, gid int) (err error)
+//sys	Fstat(fd int, stat *Stat_t) (err error)
+//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
+//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
+//sys	Ftruncate(fd int, length int64) (err error)
+//sysnb	Getegid() (egid int)
+//sysnb	Geteuid() (euid int)
+//sysnb	Getgid() (gid int)
+//sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
+//sysnb	Getuid() (uid int)
+//sysnb	InotifyInit() (fd int, err error)
+//sys	Lchown(path string, uid int, gid int) (err error)
+//sys	Lstat(path string, stat *Stat_t) (err error)
+//sys	Pause() (err error)
+//sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
+//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
+//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
+//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
+//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
+//sys	Setfsgid(gid int) (err error)
+//sys	Setfsuid(uid int) (err error)
+//sysnb	Setregid(rgid int, egid int) (err error)
+//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
+//sysnb	Setresuid(ruid int, euid int, suid int) (err error)
+//sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
+//sysnb	Setreuid(ruid int, euid int) (err error)
+//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
+//sys	Stat(path string, stat *Stat_t) (err error)
+//sys	Statfs(path string, buf *Statfs_t) (err error)
+//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
+//sys	Truncate(path string, length int64) (err error)
+//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
+//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
+//sysnb	setgroups(n int, list *_Gid_t) (err error)
+
+//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
+//sysnb	Gettimeofday(tv *Timeval) (err error)
+
+func Time(t *Time_t) (tt Time_t, err error) {
+	var tv Timeval
+	err = Gettimeofday(&tv)
+	if err != nil {
+		return 0, err
+	}
+	if t != nil {
+		*t = Time_t(tv.Sec)
+	}
+	return Time_t(tv.Sec), nil
+}
+
+//sys	Utime(path string, buf *Utimbuf) (err error)
+//sys	utimes(path string, times *[2]Timeval) (err error)
+
+func setTimespec(sec, nsec int64) Timespec {
+	return Timespec{Sec: sec, Nsec: nsec}
+}
+
+func setTimeval(sec, usec int64) Timeval {
+	return Timeval{Sec: sec, Usec: usec}
+}
+
+//sysnb pipe2(p *[2]_C_int, flags int) (err error)
+
+func Pipe(p []int) (err error) {
+	if len(p) != 2 {
+		return EINVAL
+	}
+	var pp [2]_C_int
+	err = pipe2(&pp, 0) // pipe2 is the same as pipe when flags are set to 0.
+	p[0] = int(pp[0])
+	p[1] = int(pp[1])
+	return
+}
+
+func Pipe2(p []int, flags int) (err error) {
+	if len(p) != 2 {
+		return EINVAL
+	}
+	var pp [2]_C_int
+	err = pipe2(&pp, flags)
+	p[0] = int(pp[0])
+	p[1] = int(pp[1])
+	return
+}
+
+func Ioperm(from int, num int, on int) (err error) {
+	return ENOSYS
+}
+
+func Iopl(level int) (err error) {
+	return ENOSYS
+}
+
+func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr }
+
+func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc }
+
+func (iov *Iovec) SetLen(length int) {
+	iov.Len = uint64(length)
+}
+
+func (msghdr *Msghdr) SetControllen(length int) {
+	msghdr.Controllen = uint64(length)
+}
+
+func (cmsg *Cmsghdr) SetLen(length int) {
+	cmsg.Len = uint64(length)
+}
+
+// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
+// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
+func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
+	mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
+	r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
+	xaddr = uintptr(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// On s390x Linux, all the socket calls go through an extra indirection.
+// The arguments to the underlying system call (SYS_SOCKETCALL) are the
+// number below and a pointer to an array of uintptr.
+const (
+	// see linux/net.h
+	netSocket      = 1
+	netBind        = 2
+	netConnect     = 3
+	netListen      = 4
+	netAccept      = 5
+	netGetSockName = 6
+	netGetPeerName = 7
+	netSocketPair  = 8
+	netSend        = 9
+	netRecv        = 10
+	netSendTo      = 11
+	netRecvFrom    = 12
+	netShutdown    = 13
+	netSetSockOpt  = 14
+	netGetSockOpt  = 15
+	netSendMsg     = 16
+	netRecvMsg     = 17
+	netAccept4     = 18
+	netRecvMMsg    = 19
+	netSendMMsg    = 20
+)
+
+func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (int, error) {
+	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
+	fd, _, err := Syscall(SYS_SOCKETCALL, netAccept, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return 0, err
+	}
+	return int(fd), nil
+}
+
+func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) {
+	args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)}
+	fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return 0, err
+	}
+	return int(fd), nil
+}
+
+func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
+	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
+	_, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
+	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
+	_, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func socketpair(domain int, typ int, flags int, fd *[2]int32) error {
+	args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))}
+	_, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error {
+	args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
+	_, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error {
+	args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
+	_, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func socket(domain int, typ int, proto int) (int, error) {
+	args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)}
+	fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return 0, err
+	}
+	return int(fd), nil
+}
+
+func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error {
+	args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))}
+	_, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error {
+	args := [4]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val)}
+	_, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) {
+	var base uintptr
+	if len(p) > 0 {
+		base = uintptr(unsafe.Pointer(&p[0]))
+	}
+	args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))}
+	n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return 0, err
+	}
+	return int(n), nil
+}
+
+func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error {
+	var base uintptr
+	if len(p) > 0 {
+		base = uintptr(unsafe.Pointer(&p[0]))
+	}
+	args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)}
+	_, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func recvmsg(s int, msg *Msghdr, flags int) (int, error) {
+	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
+	n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return 0, err
+	}
+	return int(n), nil
+}
+
+func sendmsg(s int, msg *Msghdr, flags int) (int, error) {
+	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
+	n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return 0, err
+	}
+	return int(n), nil
+}
+
+func Listen(s int, n int) error {
+	args := [2]uintptr{uintptr(s), uintptr(n)}
+	_, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+func Shutdown(s, how int) error {
+	args := [2]uintptr{uintptr(s), uintptr(how)}
+	_, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0)
+	if err != 0 {
+		return err
+	}
+	return nil
+}
+
+//sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
+
+func Poll(fds []PollFd, timeout int) (n int, err error) {
+	if len(fds) == 0 {
+		return poll(nil, 0, timeout)
+	}
+	return poll(&fds[0], len(fds), timeout)
+}