diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index d09cec1414e..d022604cc46 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-03e53c928ebaa15a915eb1e1b07f193d83fc2852
+d56717f8c434b3d6b753c027487681769e201e14
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/Makefile.am b/libgo/Makefile.am
index b7c3e1810dc..b4243e77ae8 100644
--- a/libgo/Makefile.am
+++ b/libgo/Makefile.am
@@ -736,6 +736,12 @@ s-epoll: Makefile
 	$(SHELL) $(srcdir)/mvifdiff.sh epoll.go.tmp epoll.go
 	$(STAMP) $@
 
+if LIBGO_IS_LINUX
+syscall_lib_clone_lo = syscall/clone_linux.lo
+else
+syscall_lib_clone_lo =
+endif
+
 libgo_go_objs = \
 	bufio.lo \
 	bytes.lo \
@@ -767,6 +773,7 @@ libgo_go_objs = \
 	strings/index.lo \
 	sync.lo \
 	syscall.lo \
+	$(syscall_lib_clone_lo) \
 	syscall/errno.lo \
 	syscall/signame.lo \
 	syscall/wait.lo \
@@ -2534,6 +2541,9 @@ syscall.lo.dep: $(srcdir)/go/syscall/*.go $(extra_go_files_syscall)
 	$(BUILDDEPS)
 syscall.lo:
 	$(BUILDPACKAGE)
+syscall/clone_linux.lo: go/syscall/clone_linux.c runtime.inc
+	@$(MKDIR_P) syscall
+	$(LTCOMPILE) -c -o $@ $<
 syscall/errno.lo: go/syscall/errno.c runtime.inc
 	@$(MKDIR_P) syscall
 	$(LTCOMPILE) -c -o $@ $<
diff --git a/libgo/Makefile.in b/libgo/Makefile.in
index e6571cd6d0c..5c824e5c0b3 100644
--- a/libgo/Makefile.in
+++ b/libgo/Makefile.in
@@ -168,21 +168,22 @@ libnetgo_a_DEPENDENCIES = netgo.o
 am_libnetgo_a_OBJECTS =
 libnetgo_a_OBJECTS = $(am_libnetgo_a_OBJECTS)
 LTLIBRARIES = $(toolexeclib_LTLIBRARIES)
-am__DEPENDENCIES_1 = bufio.lo bytes.lo bytes/index.lo context.lo \
+@LIBGO_IS_LINUX_TRUE@am__DEPENDENCIES_1 = syscall/clone_linux.lo
+am__DEPENDENCIES_2 = bufio.lo bytes.lo bytes/index.lo context.lo \
 	crypto.lo encoding.lo errors.lo expvar.lo flag.lo fmt.lo \
 	hash.lo html.lo image.lo io.lo log.lo math.lo mime.lo net.lo \
 	os.lo path.lo reflect-go.lo reflect/makefunc_ffi_c.lo \
 	regexp.lo runtime-go.lo sort.lo strconv.lo strings.lo \
-	strings/index.lo sync.lo syscall.lo syscall/errno.lo \
-	syscall/signame.lo syscall/wait.lo testing.lo time-go.lo \
-	unicode.lo archive/tar.lo archive/zip.lo compress/bzip2.lo \
-	compress/flate.lo compress/gzip.lo compress/lzw.lo \
-	compress/zlib.lo container/heap.lo container/list.lo \
-	container/ring.lo crypto/aes.lo crypto/cipher.lo crypto/des.lo \
-	crypto/dsa.lo crypto/ecdsa.lo crypto/elliptic.lo \
-	crypto/hmac.lo crypto/md5.lo crypto/rand.lo crypto/rc4.lo \
-	crypto/rsa.lo crypto/sha1.lo crypto/sha256.lo crypto/sha512.lo \
-	crypto/subtle.lo crypto/tls.lo crypto/x509.lo \
+	strings/index.lo sync.lo syscall.lo $(am__DEPENDENCIES_1) \
+	syscall/errno.lo syscall/signame.lo syscall/wait.lo testing.lo \
+	time-go.lo unicode.lo archive/tar.lo archive/zip.lo \
+	compress/bzip2.lo compress/flate.lo compress/gzip.lo \
+	compress/lzw.lo compress/zlib.lo container/heap.lo \
+	container/list.lo container/ring.lo crypto/aes.lo \
+	crypto/cipher.lo crypto/des.lo crypto/dsa.lo crypto/ecdsa.lo \
+	crypto/elliptic.lo crypto/hmac.lo crypto/md5.lo crypto/rand.lo \
+	crypto/rc4.lo crypto/rsa.lo crypto/sha1.lo crypto/sha256.lo \
+	crypto/sha512.lo crypto/subtle.lo crypto/tls.lo crypto/x509.lo \
 	crypto/x509/pkix.lo database/sql.lo database/sql/driver.lo \
 	debug/dwarf.lo debug/elf.lo debug/gosym.lo debug/macho.lo \
 	debug/pe.lo debug/plan9obj.lo encoding/ascii85.lo \
@@ -217,12 +218,12 @@ am__DEPENDENCIES_1 = bufio.lo bytes.lo bytes/index.lo context.lo \
 	text/scanner.lo text/tabwriter.lo text/template.lo \
 	text/template/parse.lo testing/iotest.lo testing/quick.lo \
 	unicode/utf16.lo unicode/utf8.lo
-am__DEPENDENCIES_2 =
-am__DEPENDENCIES_3 = $(am__DEPENDENCIES_1) \
-	../libbacktrace/libbacktrace.la $(am__DEPENDENCIES_2) \
-	$(am__DEPENDENCIES_2) $(am__DEPENDENCIES_2) \
-	$(am__DEPENDENCIES_2) $(am__DEPENDENCIES_2)
-libgo_llgo_la_DEPENDENCIES = $(am__DEPENDENCIES_3)
+am__DEPENDENCIES_3 =
+am__DEPENDENCIES_4 = $(am__DEPENDENCIES_2) \
+	../libbacktrace/libbacktrace.la $(am__DEPENDENCIES_3) \
+	$(am__DEPENDENCIES_3) $(am__DEPENDENCIES_3) \
+	$(am__DEPENDENCIES_3) $(am__DEPENDENCIES_3)
+libgo_llgo_la_DEPENDENCIES = $(am__DEPENDENCIES_4)
 @HAVE_SYS_MMAN_H_FALSE@am__objects_1 = mem_posix_memalign.lo
 @HAVE_SYS_MMAN_H_TRUE@am__objects_1 = mem.lo
 @LIBGO_IS_LINUX_FALSE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = netpoll_kqueue.lo
@@ -272,7 +273,7 @@ libgo_llgo_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(libgo_llgo_la_LDFLAGS) $(LDFLAGS) -o $@
 @GOC_IS_LLGO_TRUE@am_libgo_llgo_la_rpath = -rpath $(toolexeclibdir)
-libgo_la_DEPENDENCIES = $(am__DEPENDENCIES_3)
+libgo_la_DEPENDENCIES = $(am__DEPENDENCIES_4)
 am_libgo_la_OBJECTS = $(am__objects_6)
 libgo_la_OBJECTS = $(am_libgo_la_OBJECTS)
 libgo_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
@@ -948,6 +949,8 @@ SYSINFO_FLAGS = \
 	$(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(OSCFLAGS) -O
 
+@LIBGO_IS_LINUX_FALSE@syscall_lib_clone_lo = 
+@LIBGO_IS_LINUX_TRUE@syscall_lib_clone_lo = syscall/clone_linux.lo
 libgo_go_objs = \
 	bufio.lo \
 	bytes.lo \
@@ -979,6 +982,7 @@ libgo_go_objs = \
 	strings/index.lo \
 	sync.lo \
 	syscall.lo \
+	$(syscall_lib_clone_lo) \
 	syscall/errno.lo \
 	syscall/signame.lo \
 	syscall/wait.lo \
@@ -5109,6 +5113,9 @@ syscall.lo.dep: $(srcdir)/go/syscall/*.go $(extra_go_files_syscall)
 	$(BUILDDEPS)
 syscall.lo:
 	$(BUILDPACKAGE)
+syscall/clone_linux.lo: go/syscall/clone_linux.c runtime.inc
+	@$(MKDIR_P) syscall
+	$(LTCOMPILE) -c -o $@ $<
 syscall/errno.lo: go/syscall/errno.c runtime.inc
 	@$(MKDIR_P) syscall
 	$(LTCOMPILE) -c -o $@ $<
diff --git a/libgo/go/internal/syscall/unix/getrandom_linux_sparc.go b/libgo/go/internal/syscall/unix/getrandom_linux_sparcx.go
similarity index 100%
rename from libgo/go/internal/syscall/unix/getrandom_linux_sparc.go
rename to libgo/go/internal/syscall/unix/getrandom_linux_sparcx.go
diff --git a/libgo/go/syscall/clone_linux.c b/libgo/go/syscall/clone_linux.c
new file mode 100644
index 00000000000..a1a15ea05d8
--- /dev/null
+++ b/libgo/go/syscall/clone_linux.c
@@ -0,0 +1,100 @@
+/* clone_linux.c -- consistent wrapper around Linux clone syscall
+
+   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.  */
+
+#include <errno.h>
+#include <asm/ptrace.h>
+#include <sys/syscall.h>
+
+#include "runtime.h"
+
+long rawClone (unsigned long flags, void *child_stack, void *ptid, void *ctid, struct pt_regs *regs) __asm__ (GOSYM_PREFIX "syscall.rawClone");
+
+long
+rawClone (unsigned long flags, void *child_stack, void *ptid, void *ctid, struct pt_regs *regs)
+{
+#if defined(__arc__) || defined(__aarch64__) || defined(__arm__) || defined(__mips__) || defined(__hppa__) || defined(__powerpc__) || defined(__score__) || defined(__i386__) || defined(__xtensa__)
+  // CLONE_BACKWARDS
+  return syscall(__NR_clone, flags, child_stack, ptid, regs, ctid);
+#elif defined(__s390__) || defined(__cris__)
+  // CLONE_BACKWARDS2
+  return syscall(__NR_clone, child_stack, flags, ptid, ctid, regs);
+#elif defined(__microblaze__)
+  // CLONE_BACKWARDS3
+  return syscall(__NR_clone, flags, child_stack, 0, ptid, ctid, regs);
+#elif defined(__sparc__)
+
+  /* SPARC has a unique return value convention:
+
+     Parent -->  %o0 == child's  pid, %o1 == 0
+     Child  -->  %o0 == parent's pid, %o1 == 1
+
+     Translate this to look like a normal clone.  */
+
+# if defined(__arch64__)
+
+#  define SYSCALL_STRING						\
+	"ta	0x6d;"							\
+	"bcc,pt	%%xcc, 1f;"						\
+	" mov	0, %%g1;"						\
+	"sub	%%g0, %%o0, %%o0;"					\
+	"mov	1, %%g1;"						\
+	"1:"
+
+#  define SYSCALL_CLOBBERS						\
+	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",			\
+	"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",		\
+	"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",		\
+	"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",		\
+	"f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46",		\
+	"f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",		\
+	"cc", "memory"
+
+# else /* __arch64__ */
+
+#  define SYSCALL_STRING						\
+	"ta	0x10;"							\
+	"bcc	1f;"							\
+	" mov	0, %%g1;"						\
+	"sub	%%g0, %%o0, %%o0;"					\
+	"mov	1, %%g1;"						\
+	"1:"
+
+#  define SYSCALL_CLOBBERS						\
+	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",			\
+	"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",		\
+	"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",		\
+	"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",		\
+	"cc", "memory"
+
+# endif /* __arch64__ */
+
+  register long o0 __asm__ ("o0") = (long)flags;
+  register long o1 __asm__ ("o1") = (long)child_stack;
+  register long o2 __asm__ ("o2") = (long)ptid;
+  register long o3 __asm__ ("o3") = (long)ctid;
+  register long o4 __asm__ ("o4") = (long)regs;
+  register long g1 __asm__ ("g1") = __NR_clone;
+
+  __asm __volatile (SYSCALL_STRING :
+		    "=r" (g1), "=r" (o0), "=r" (o1) :
+		    "0" (g1), "1" (o0), "2" (o1),
+		    "r" (o2), "r" (o3), "r" (o4) :
+		    SYSCALL_CLOBBERS);
+
+  if (__builtin_expect(g1 != 0, 0))
+    {
+      errno = -o0;
+      o0 = -1L;
+    }
+  else
+    o0 &= (o1 - 1);
+
+  return o0;
+
+#else
+  return syscall(__NR_clone, flags, child_stack, ptid, ctid, regs);
+#endif
+}
diff --git a/libgo/go/syscall/exec_linux.go b/libgo/go/syscall/exec_linux.go
index 581a9886dcf..83d9c1ca2db 100644
--- a/libgo/go/syscall/exec_linux.go
+++ b/libgo/go/syscall/exec_linux.go
@@ -7,7 +7,6 @@
 package syscall
 
 import (
-	"runtime"
 	"unsafe"
 )
 
@@ -49,6 +48,9 @@ type SysProcAttr struct {
 func runtime_BeforeFork()
 func runtime_AfterFork()
 
+// Implemented in clone_linux.c
+func rawClone(flags _C_ulong, child_stack *byte, ptid *Pid_t, ctid *Pid_t, regs unsafe.Pointer) _C_long
+
 // Fork, dup fd onto 0..len(fd), and exec(argv0, argvv, envv) in child.
 // If a dup or exec fails, write the errno error to pipe.
 // (Pipe is close-on-exec so if exec succeeds, it will be closed.)
@@ -64,6 +66,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
 	// declarations require heap allocation (e.g., err1).
 	var (
 		r1     uintptr
+		r2     _C_long
 		err1   Errno
 		err2   Errno
 		nextfd int
@@ -98,20 +101,16 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
 	// About to call fork.
 	// No more allocation or calls of non-assembly functions.
 	runtime_BeforeFork()
-	if runtime.GOARCH == "s390x" || runtime.GOARCH == "s390" {
-		r1, _, err1 = RawSyscall6(SYS_CLONE, 0, uintptr(SIGCHLD)|sys.Cloneflags, 0, 0, 0, 0)
-	} else {
-		r1, _, err1 = RawSyscall6(SYS_CLONE, uintptr(SIGCHLD)|sys.Cloneflags, 0, 0, 0, 0, 0)
-	}
-	if err1 != 0 {
+	r2 = rawClone(_C_ulong(uintptr(SIGCHLD)|sys.Cloneflags), nil, nil, nil, unsafe.Pointer(nil))
+	if r2 < 0 {
 		runtime_AfterFork()
-		return 0, err1
+		return 0, GetErrno()
 	}
 
-	if r1 != 0 {
+	if r2 != 0 {
 		// parent; return PID
 		runtime_AfterFork()
-		pid = int(r1)
+		pid = int(r2)
 
 		if sys.UidMappings != nil || sys.GidMappings != nil {
 			Close(p[0])
diff --git a/libgo/mksysinfo.sh b/libgo/mksysinfo.sh
index eeac94a3ecf..f79b5cfd7d8 100755
--- a/libgo/mksysinfo.sh
+++ b/libgo/mksysinfo.sh
@@ -349,8 +349,10 @@ fi
 sizeof_long=`grep '^const ___SIZEOF_LONG__ = ' gen-sysinfo.go | sed -e 's/.*= //'`
 if test "$sizeof_long" = "4"; then
   echo "type _C_long int32" >> ${OUT}
+  echo "type _C_ulong uint32" >> ${OUT}
 elif test "$sizeof_long" = "8"; then
   echo "type _C_long int64" >> ${OUT}
+  echo "type _C_ulong uint64" >> ${OUT}
 else
   echo 1>&2 "mksysinfo.sh: could not determine size of long (got $sizeof_long)"
   exit 1