libgo: Upgrade to Go 1.4.2 release.

From-SVN: r221245

18 files changed, 170 insertions, 66 deletions

diff --git a/libgo/MERGE b/libgo/MERGE
index 0e12671..260f8cf 100644
--- a/libgo/MERGE
+++ b/libgo/MERGE
@@ -1,4 +1,4 @@
-14854533dcc7
+883bc6ed0ea815293fe6309d66f967ea60630e87
 
-The first line of this file holds the Mercurial revision number of the
+The first line of this file holds the git revision number of the
 last merge done from the master library sources.
diff --git a/libgo/VERSION b/libgo/VERSION
index 40c8f5c..bcab27e 100644
--- a/libgo/VERSION
+++ b/libgo/VERSION
@@ -1 +1 @@
-go1.4
\ No newline at end of file
+go1.4.2
\ No newline at end of file
diff --git a/libgo/go/cmd/go/doc.go b/libgo/go/cmd/go/doc.go
index d0d8a8a..7191ee0 100644
--- a/libgo/go/cmd/go/doc.go
+++ b/libgo/go/cmd/go/doc.go
@@ -308,6 +308,7 @@ The generator is run in the package's source directory.
 Go generate accepts one specific flag:
 
 	-run=""
+		TODO: This flag is unimplemented.
 		if non-empty, specifies a regular expression to
 		select directives whose command matches the expression.
 
diff --git a/libgo/go/cmd/go/generate.go b/libgo/go/cmd/go/generate.go
index baf4d2b..3c0af87 100644
--- a/libgo/go/cmd/go/generate.go
+++ b/libgo/go/cmd/go/generate.go
@@ -106,6 +106,7 @@ The generator is run in the package's source directory.
 Go generate accepts one specific flag:
 
 	-run=""
+		TODO: This flag is unimplemented.
 		if non-empty, specifies a regular expression to
 		select directives whose command matches the expression.
 
@@ -255,6 +256,10 @@ func (g *Generator) split(line string) []string {
 	// Parse line, obeying quoted strings.
 	var words []string
 	line = line[len("//go:generate ") : len(line)-1] // Drop preamble and final newline.
+	// There may still be a carriage return.
+	if len(line) > 0 && line[len(line)-1] == '\r' {
+		line = line[:len(line)-1]
+	}
 	// One (possibly quoted) word per iteration.
 Words:
 	for {
diff --git a/libgo/go/cmd/go/generate_test.go b/libgo/go/cmd/go/generate_test.go
index 660ebab..2ec5486 100644
--- a/libgo/go/cmd/go/generate_test.go
+++ b/libgo/go/cmd/go/generate_test.go
@@ -40,9 +40,15 @@ func TestGenerateCommandParse(t *testing.T) {
 	}
 	g.setShorthand([]string{"-command", "yacc", "go", "tool", "yacc"})
 	for _, test := range splitTests {
+		// First with newlines.
 		got := g.split("//go:generate " + test.in + "\n")
 		if !reflect.DeepEqual(got, test.out) {
 			t.Errorf("split(%q): got %q expected %q", test.in, got, test.out)
 		}
+		// Then with CRLFs, thank you Windows.
+		got = g.split("//go:generate " + test.in + "\r\n")
+		if !reflect.DeepEqual(got, test.out) {
+			t.Errorf("split(%q): got %q expected %q", test.in, got, test.out)
+		}
 	}
 }
diff --git a/libgo/go/cmd/go/get.go b/libgo/go/cmd/go/get.go
index 86e1697..50e0ca9 100644
--- a/libgo/go/cmd/go/get.go
+++ b/libgo/go/cmd/go/get.go
@@ -290,7 +290,7 @@ func downloadPackage(p *Package) error {
 						}
 					}
 					if remote != repo {
-						return fmt.Errorf("%s is from %s, should be from %s", dir, remote, repo)
+						return fmt.Errorf("%s is a custom import path for %s, but %s is checked out from %s", rr.root, repo, dir, remote)
 					}
 				}
 			}
diff --git a/libgo/go/math/big/int.go b/libgo/go/math/big/int.go
index d22e39e..ade5c2f 100644
--- a/libgo/go/math/big/int.go
+++ b/libgo/go/math/big/int.go
@@ -887,7 +887,7 @@ func (z *Int) AndNot(x, y *Int) *Int {
 	}
 
 	// x &^ (-y) == x &^ ^(y-1) == x & (y-1)
-	y1 := nat(nil).add(y.abs, natOne)
+	y1 := nat(nil).sub(y.abs, natOne)
 	z.abs = z.abs.and(x.abs, y1)
 	z.neg = false
 	return z
diff --git a/libgo/go/math/big/int_test.go b/libgo/go/math/big/int_test.go
index 6070cf3..2d762db 100644
--- a/libgo/go/math/big/int_test.go
+++ b/libgo/go/math/big/int_test.go
@@ -1201,6 +1201,7 @@ var bitwiseTests = []struct {
 	{"-0x01", "-0x01", "-0x01", "-0x01", "0x00", "0x00"},
 	{"0x07", "0x08", "0x00", "0x0f", "0x0f", "0x07"},
 	{"0x05", "0x0f", "0x05", "0x0f", "0x0a", "0x00"},
+	{"0xff", "-0x0a", "0xf6", "-0x01", "-0xf7", "0x09"},
 	{"0x013ff6", "0x9a4e", "0x1a46", "0x01bffe", "0x01a5b8", "0x0125b0"},
 	{"-0x013ff6", "0x9a4e", "0x800a", "-0x0125b2", "-0x01a5bc", "-0x01c000"},
 	{"-0x013ff6", "-0x9a4e", "-0x01bffe", "-0x1a46", "0x01a5b8", "0x8008"},
diff --git a/libgo/go/reflect/type.go b/libgo/go/reflect/type.go
index 1011354..5cbf7e5 100644
--- a/libgo/go/reflect/type.go
+++ b/libgo/go/reflect/type.go
@@ -248,12 +248,12 @@ const (
 // with a unique tag like `reflect:"array"` or `reflect:"ptr"`
 // so that code cannot convert from, say, *arrayType to *ptrType.
 type rtype struct {
-	kind       uint8   // enumeration for C
-	align      int8    // alignment of variable with this type
-	fieldAlign uint8   // alignment of struct field with this type
-	_          uint8   // unused/padding
+	kind       uint8 // enumeration for C
+	align      int8  // alignment of variable with this type
+	fieldAlign uint8 // alignment of struct field with this type
+	_          uint8 // unused/padding
 	size       uintptr
-	hash       uint32  // hash of type; avoids computation in hash tables
+	hash       uint32 // hash of type; avoids computation in hash tables
 
 	hashfn  uintptr // hash function code
 	equalfn uintptr // equality function code
@@ -1582,8 +1582,9 @@ func MapOf(key, elem Type) Type {
 
 // gcProg is a helper type for generatation of GC pointer info.
 type gcProg struct {
-	gc   []byte
-	size uintptr // size of type in bytes
+	gc     []byte
+	size   uintptr // size of type in bytes
+	hasPtr bool
 }
 
 func (gc *gcProg) append(v byte) {
@@ -1644,11 +1645,14 @@ func (gc *gcProg) appendWord(v byte) {
 	gc.gc[nptr/2] &= ^(3 << ((nptr%2)*4 + 2))
 	gc.gc[nptr/2] |= v << ((nptr%2)*4 + 2)
 	gc.size += ptrsize
+	if v == bitsPointer {
+		gc.hasPtr = true
+	}
 }
 
-func (gc *gcProg) finalize() unsafe.Pointer {
+func (gc *gcProg) finalize() (unsafe.Pointer, bool) {
 	if gc.size == 0 {
-		return nil
+		return nil, false
 	}
 	ptrsize := unsafe.Sizeof(uintptr(0))
 	gc.align(ptrsize)
@@ -1663,7 +1667,7 @@ func (gc *gcProg) finalize() unsafe.Pointer {
 			gc.appendWord(extractGCWord(gc.gc, i))
 		}
 	}
-	return unsafe.Pointer(&gc.gc[0])
+	return unsafe.Pointer(&gc.gc[0]), gc.hasPtr
 }
 
 func extractGCWord(gc []byte, i uintptr) byte {
@@ -1708,10 +1712,6 @@ func bucketOf(ktyp, etyp *rtype) *rtype {
 	for i := 0; i < int(bucketSize*unsafe.Sizeof(uint8(0))/ptrsize); i++ {
 		gc.append(bitsScalar)
 	}
-	gc.append(bitsPointer) // overflow
-	if runtime.GOARCH == "amd64p32" {
-		gc.append(bitsScalar)
-	}
 	// keys
 	for i := 0; i < bucketSize; i++ {
 		gc.appendProg(ktyp)
@@ -1720,10 +1720,15 @@ func bucketOf(ktyp, etyp *rtype) *rtype {
 	for i := 0; i < bucketSize; i++ {
 		gc.appendProg(etyp)
 	}
+	// overflow
+	gc.append(bitsPointer)
+	if runtime.GOARCH == "amd64p32" {
+		gc.append(bitsScalar)
+	}
 
 	b := new(rtype)
 	b.size = gc.size
-	// b.gc[0] = gc.finalize()
+	// b.gc[0], _ = gc.finalize()
 	b.kind |= kindGCProg
 	s := "bucket(" + *ktyp.string + "," + *etyp.string + ")"
 	b.string = &s
diff --git a/libgo/go/runtime/crash_cgo_test.go b/libgo/go/runtime/crash_cgo_test.go
index 972eedc..29f90fa 100644
--- a/libgo/go/runtime/crash_cgo_test.go
+++ b/libgo/go/runtime/crash_cgo_test.go
@@ -7,6 +7,7 @@
 package runtime_test
 
 import (
+	"os/exec"
 	"runtime"
 	"strings"
 	"testing"
@@ -50,6 +51,30 @@ func TestCgoExternalThreadPanic(t *testing.T) {
 	}
 }
 
+func TestCgoExternalThreadSIGPROF(t *testing.T) {
+	// issue 9456.
+	switch runtime.GOOS {
+	case "plan9", "windows":
+		t.Skipf("no pthreads on %s", runtime.GOOS)
+	case "darwin":
+		// static constructor needs external linking, but we don't support
+		// external linking on OS X 10.6.
+		out, err := exec.Command("uname", "-r").Output()
+		if err != nil {
+			t.Fatalf("uname -r failed: %v", err)
+		}
+		// OS X 10.6 == Darwin 10.x
+		if strings.HasPrefix(string(out), "10.") {
+			t.Skipf("no external linking on OS X 10.6")
+		}
+	}
+	got := executeTest(t, cgoExternalThreadSIGPROFSource, nil)
+	want := "OK\n"
+	if got != want {
+		t.Fatalf("expected %q, but got %q", want, got)
+	}
+}
+
 const cgoSignalDeadlockSource = `
 package main
 
@@ -194,3 +219,46 @@ start(void)
 		printf("_beginthreadex failed\n");
 }
 `
+
+const cgoExternalThreadSIGPROFSource = `
+package main
+
+/*
+#include <stdint.h>
+#include <signal.h>
+#include <pthread.h>
+
+volatile int32_t spinlock;
+
+static void *thread1(void *p) {
+	(void)p;
+	while (spinlock == 0)
+		;
+	pthread_kill(pthread_self(), SIGPROF);
+	spinlock = 0;
+	return NULL;
+}
+__attribute__((constructor)) void issue9456() {
+	pthread_t tid;
+	pthread_create(&tid, 0, thread1, NULL);
+}
+*/
+import "C"
+
+import (
+	"runtime"
+	"sync/atomic"
+	"unsafe"
+)
+
+func main() {
+	// This test intends to test that sending SIGPROF to foreign threads
+	// before we make any cgo call will not abort the whole process, so
+	// we cannot make any cgo call here. See http://golang.org/issue/9456.
+	atomic.StoreInt32((*int32)(unsafe.Pointer(&C.spinlock)), 1)
+	for atomic.LoadInt32((*int32)(unsafe.Pointer(&C.spinlock))) == 1 {
+		runtime.Gosched()
+	}
+	println("OK")
+}
+`
diff --git a/libgo/go/runtime/hashmap.go b/libgo/go/runtime/hashmap.go
index b4e6244..791af8c 100644
--- a/libgo/go/runtime/hashmap.go
+++ b/libgo/go/runtime/hashmap.go
@@ -117,12 +117,12 @@ type hmap struct {
 
 // A bucket for a Go map.
 type bmap struct {
-	tophash  [bucketCnt]uint8
-	overflow *bmap
+	tophash [bucketCnt]uint8
 	// Followed by bucketCnt keys and then bucketCnt values.
 	// NOTE: packing all the keys together and then all the values together makes the
 	// code a bit more complicated than alternating key/value/key/value/... but it allows
 	// us to eliminate padding which would be needed for, e.g., map[int64]int8.
+	// Followed by an overflow pointer.
 }
 
 // A hash iteration structure.
@@ -149,6 +149,13 @@ func evacuated(b *bmap) bool {
 	return h > empty && h < minTopHash
 }
 
+func (b *bmap) overflow(t *maptype) *bmap {
+	return *(**bmap)(add(unsafe.Pointer(b), uintptr(t.bucketsize)-regSize))
+}
+func (b *bmap) setoverflow(t *maptype, ovf *bmap) {
+	*(**bmap)(add(unsafe.Pointer(b), uintptr(t.bucketsize)-regSize)) = ovf
+}
+
 func makemap(t *maptype, hint int64) *hmap {
 	if sz := unsafe.Sizeof(hmap{}); sz > 48 || sz != uintptr(t.hmap.size) {
 		gothrow("bad hmap size")
@@ -275,7 +282,7 @@ func mapaccess1(t *maptype, h *hmap, key unsafe.Pointer) unsafe.Pointer {
 				return v
 			}
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero)
 		}
@@ -323,7 +330,7 @@ func mapaccess2(t *maptype, h *hmap, key unsafe.Pointer) (unsafe.Pointer, bool)
 				return v, true
 			}
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero), false
 		}
@@ -366,7 +373,7 @@ func mapaccessK(t *maptype, h *hmap, key unsafe.Pointer) (unsafe.Pointer, unsafe
 				return k, v
 			}
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return nil, nil
 		}
@@ -437,10 +444,11 @@ again:
 			memmove(v2, val, uintptr(t.elem.size))
 			return
 		}
-		if b.overflow == nil {
+		ovf := b.overflow(t)
+		if ovf == nil {
 			break
 		}
-		b = b.overflow
+		b = ovf
 	}
 
 	// did not find mapping for key.  Allocate new cell & add entry.
@@ -455,7 +463,7 @@ again:
 			memstats.next_gc = memstats.heap_alloc
 		}
 		newb := (*bmap)(newobject(t.bucket))
-		b.overflow = newb
+		b.setoverflow(t, newb)
 		inserti = &newb.tophash[0]
 		insertk = add(unsafe.Pointer(newb), dataOffset)
 		insertv = add(insertk, bucketCnt*uintptr(t.keysize))
@@ -525,7 +533,7 @@ func mapdelete(t *maptype, h *hmap, key unsafe.Pointer) {
 			h.count--
 			return
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return
 		}
@@ -720,7 +728,7 @@ next:
 			return
 		}
 	}
-	b = b.overflow
+	b = b.overflow(t)
 	i = 0
 	goto next
 }
@@ -778,7 +786,7 @@ func evacuate(t *maptype, h *hmap, oldbucket uintptr) {
 		yk := add(unsafe.Pointer(y), dataOffset)
 		xv := add(xk, bucketCnt*uintptr(t.keysize))
 		yv := add(yk, bucketCnt*uintptr(t.keysize))
-		for ; b != nil; b = b.overflow {
+		for ; b != nil; b = b.overflow(t) {
 			k := add(unsafe.Pointer(b), dataOffset)
 			v := add(k, bucketCnt*uintptr(t.keysize))
 			for i := 0; i < bucketCnt; i, k, v = i+1, add(k, uintptr(t.keysize)), add(v, uintptr(t.valuesize)) {
@@ -828,7 +836,7 @@ func evacuate(t *maptype, h *hmap, oldbucket uintptr) {
 							memstats.next_gc = memstats.heap_alloc
 						}
 						newx := (*bmap)(newobject(t.bucket))
-						x.overflow = newx
+						x.setoverflow(t, newx)
 						x = newx
 						xi = 0
 						xk = add(unsafe.Pointer(x), dataOffset)
@@ -855,7 +863,7 @@ func evacuate(t *maptype, h *hmap, oldbucket uintptr) {
 							memstats.next_gc = memstats.heap_alloc
 						}
 						newy := (*bmap)(newobject(t.bucket))
-						y.overflow = newy
+						y.setoverflow(t, newy)
 						y = newy
 						yi = 0
 						yk = add(unsafe.Pointer(y), dataOffset)
@@ -881,7 +889,6 @@ func evacuate(t *maptype, h *hmap, oldbucket uintptr) {
 		// Unlink the overflow buckets & clear key/value to help GC.
 		if h.flags&oldIterator == 0 {
 			b = (*bmap)(add(h.oldbuckets, oldbucket*uintptr(t.bucketsize)))
-			b.overflow = nil
 			memclr(add(unsafe.Pointer(b), dataOffset), uintptr(t.bucketsize)-dataOffset)
 		}
 	}
diff --git a/libgo/go/runtime/hashmap_fast.go b/libgo/go/runtime/hashmap_fast.go
index 8e21e02..afa6ecc 100644
--- a/libgo/go/runtime/hashmap_fast.go
+++ b/libgo/go/runtime/hashmap_fast.go
@@ -43,7 +43,7 @@ func mapaccess1_fast32(t *maptype, h *hmap, key uint32) unsafe.Pointer {
 			}
 			return add(unsafe.Pointer(b), dataOffset+bucketCnt*4+i*uintptr(t.valuesize))
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero)
 		}
@@ -85,7 +85,7 @@ func mapaccess2_fast32(t *maptype, h *hmap, key uint32) (unsafe.Pointer, bool) {
 			}
 			return add(unsafe.Pointer(b), dataOffset+bucketCnt*4+i*uintptr(t.valuesize)), true
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero), false
 		}
@@ -127,7 +127,7 @@ func mapaccess1_fast64(t *maptype, h *hmap, key uint64) unsafe.Pointer {
 			}
 			return add(unsafe.Pointer(b), dataOffset+bucketCnt*8+i*uintptr(t.valuesize))
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero)
 		}
@@ -169,7 +169,7 @@ func mapaccess2_fast64(t *maptype, h *hmap, key uint64) (unsafe.Pointer, bool) {
 			}
 			return add(unsafe.Pointer(b), dataOffset+bucketCnt*8+i*uintptr(t.valuesize)), true
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero), false
 		}
@@ -271,7 +271,7 @@ dohash:
 				return add(unsafe.Pointer(b), dataOffset+bucketCnt*2*ptrSize+i*uintptr(t.valuesize))
 			}
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero)
 		}
@@ -371,7 +371,7 @@ dohash:
 				return add(unsafe.Pointer(b), dataOffset+bucketCnt*2*ptrSize+i*uintptr(t.valuesize)), true
 			}
 		}
-		b = b.overflow
+		b = b.overflow(t)
 		if b == nil {
 			return unsafe.Pointer(t.elem.zero), false
 		}
diff --git a/libgo/go/runtime/mprof.go b/libgo/go/runtime/mprof.go
index d409c6c..f4da45f 100644
--- a/libgo/go/runtime/mprof.go
+++ b/libgo/go/runtime/mprof.go
@@ -575,20 +575,16 @@ func saveg(pc, sp uintptr, gp *g, r *StackRecord) {
 // If all is true, Stack formats stack traces of all other goroutines
 // into buf after the trace for the current goroutine.
 func Stack(buf []byte, all bool) int {
-	mp := acquirem()
-	gp := mp.curg
 	if all {
 		semacquire(&worldsema, false)
-		mp.gcing = 1
-		releasem(mp)
+		gp := getg()
+		gp.m.gcing = 1
 		onM(stoptheworld)
-		if mp != acquirem() {
-			gothrow("Stack: rescheduled")
-		}
 	}
 
 	n := 0
 	if len(buf) > 0 {
+		gp := getg()
 		sp := getcallersp(unsafe.Pointer(&buf))
 		pc := getcallerpc(unsafe.Pointer(&buf))
 		onM(func() {
@@ -605,11 +601,11 @@ func Stack(buf []byte, all bool) int {
 	}
 
 	if all {
-		mp.gcing = 0
+		gp := getg()
+		gp.m.gcing = 0
 		semrelease(&worldsema)
 		onM(starttheworld)
 	}
-	releasem(mp)
 	return n
 }
 
diff --git a/libgo/go/runtime/os_plan9.go b/libgo/go/runtime/os_plan9.go
index 20e47bf..10e5531 100644
--- a/libgo/go/runtime/os_plan9.go
+++ b/libgo/go/runtime/os_plan9.go
@@ -6,6 +6,8 @@ package runtime
 
 import "unsafe"
 
+const _SIGPROF = 0 // dummy value for badsignal
+
 func pread(fd int32, buf unsafe.Pointer, nbytes int32, offset int64) int32
 func pwrite(fd int32, buf unsafe.Pointer, nbytes int32, offset int64) int32
 func seek(fd int32, offset int64, whence int32) int64
diff --git a/libgo/go/runtime/sigqueue.go b/libgo/go/runtime/sigqueue.go
index 2d9c24d..fed4560 100644
--- a/libgo/go/runtime/sigqueue.go
+++ b/libgo/go/runtime/sigqueue.go
@@ -154,6 +154,15 @@ func signal_disable(s uint32) {
 // This runs on a foreign stack, without an m or a g.  No stack split.
 //go:nosplit
 func badsignal(sig uintptr) {
+	// Some external libraries, for example, OpenBLAS, create worker threads in
+	// a global constructor. If we're doing cpu profiling, and the SIGPROF signal
+	// comes to one of the foreign threads before we make our first cgo call, the
+	// call to cgocallback below will bring down the whole process.
+	// It's better to miss a few SIGPROF signals than to abort in this case.
+	// See http://golang.org/issue/9456.
+	if _SIGPROF != 0 && sig == _SIGPROF && needextram != 0 {
+		return
+	}
 	cgocallback(unsafe.Pointer(funcPC(sigsend)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
 }
 
diff --git a/libgo/go/runtime/syscall_windows.go b/libgo/go/runtime/syscall_windows.go
index efbcab5..51004b7 100644
--- a/libgo/go/runtime/syscall_windows.go
+++ b/libgo/go/runtime/syscall_windows.go
@@ -8,6 +8,8 @@ import (
 	"unsafe"
 )
 
+const _SIGPROF = 0 // dummy value for badsignal
+
 type callbacks struct {
 	lock mutex
 	ctxt [cb_max]*wincallbackcontext
@@ -52,11 +54,13 @@ func compileCallback(fn eface, cleanstack bool) (code uintptr) {
 		panic("compilecallback: output parameter size is wrong")
 	}
 	argsize := uintptr(0)
-	for _, t := range (*[1024](*_type))(unsafe.Pointer(&ft.in[0]))[:len(ft.in)] {
-		if (*t).size > uintptrSize {
-			panic("compilecallback: input parameter size is wrong")
+	if len(ft.in) > 0 {
+		for _, t := range (*[1024](*_type))(unsafe.Pointer(&ft.in[0]))[:len(ft.in)] {
+			if (*t).size > uintptrSize {
+				panic("compilecallback: input parameter size is wrong")
+			}
+			argsize += uintptrSize
 		}
-		argsize += uintptrSize
 	}
 
 	lock(&cbs.lock)
diff --git a/libgo/go/syscall/route_openbsd.go b/libgo/go/syscall/route_openbsd.go
index 19f902d..e508640 100644
--- a/libgo/go/syscall/route_openbsd.go
+++ b/libgo/go/syscall/route_openbsd.go
@@ -12,16 +12,16 @@ func (any *anyMessage) toRoutingMessage(b []byte) RoutingMessage {
 	switch any.Type {
 	case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE:
 		p := (*RouteMessage)(unsafe.Pointer(any))
-		return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]}
+		return &RouteMessage{Header: p.Header, Data: b[p.Header.Hdrlen:any.Msglen]}
 	case RTM_IFINFO:
 		p := (*InterfaceMessage)(unsafe.Pointer(any))
-		return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]}
+		return &InterfaceMessage{Header: p.Header, Data: b[p.Header.Hdrlen:any.Msglen]}
 	case RTM_IFANNOUNCE:
 		p := (*InterfaceAnnounceMessage)(unsafe.Pointer(any))
 		return &InterfaceAnnounceMessage{Header: p.Header}
 	case RTM_NEWADDR, RTM_DELADDR:
 		p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
-		return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
+		return &InterfaceAddrMessage{Header: p.Header, Data: b[p.Header.Hdrlen:any.Msglen]}
 	}
 	return nil
 }
diff --git a/libgo/merge.sh b/libgo/merge.sh
index 6b9e5bb..c79f759 100755
--- a/libgo/merge.sh
+++ b/libgo/merge.sh
@@ -40,12 +40,14 @@ repository=$1
 old_rev=`sed 1q MERGE`
 
 rm -rf ${OLDDIR}
-hg clone -r ${old_rev} ${repository} ${OLDDIR}
+git clone ${repository} ${OLDDIR}
+(cd ${OLDDIR} && git checkout ${old_rev})
 
 rm -rf ${NEWDIR}
-hg clone -u ${rev} ${repository} ${NEWDIR}
+git clone ${repository} ${NEWDIR}
+(cd ${NEWDIR} && git checkout ${rev})
 
-new_rev=`cd ${NEWDIR} && hg log -r ${rev} | sed 1q | sed -e 's/.*://'`
+new_rev=`cd ${NEWDIR} && git log | sed 1q | sed -e 's/commit //'`
 
 merge() {
   name=$1
@@ -69,7 +71,7 @@ merge() {
   elif test -f ${old}; then
     # The file exists in the old version.
     if ! test -f ${libgo}; then
-      echo "merge.sh: $name: skipping: exists in old and new hg, but not in libgo"
+      echo "merge.sh: $name: skipping: exists in old and new git, but not in libgo"
       continue
     fi
     if cmp -s ${old} ${libgo}; then
@@ -160,11 +162,10 @@ done
   if ! test -d ${oldtd}; then
     continue
   fi
-  (cd ${oldtd} && hg status -A .) | while read f; do
-    if test "`basename $f`" = ".hgignore"; then
+  (cd ${oldtd} && git ls-files .) | while read f; do
+    if test "`basename $f`" = ".gitignore"; then
       continue
     fi
-    f=`echo $f | sed -e 's/^..//'`
     name=$d/$f
     oldfile=${oldtd}/$f
     newfile=${newtd}/$f
@@ -189,11 +190,10 @@ for c in $cmdlist; do
     if ! test -d ${oldtd}; then
       continue
     fi
-    (cd ${oldtd} && hg status -A .) | while read f; do
-      if test "`basename $f`" = ".hgignore"; then
+    (cd ${oldtd} && git ls-files .) | while read f; do
+      if test "`basename $f`" = ".gitignore"; then
         continue
       fi
-      f=`echo $f | sed -e 's/^..//'`
       name=$d/$f
       oldfile=${oldtd}/$f
       newfile=${newtd}/$f