cgo: enable cgo on netbsd/386 and netbsd/amd64

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6261056

doc/progs/run

@@ -40,6 +40,11 @@ c_go_cgo="
 if [ "$goos" == "freebsd" ]; then
 	c_go_cgo="cgo3 cgo4"
 fi
+# cgo1 and cgo2 don't run on netbsd, srandom has a different signature
+# cgo3 and cgo4 don't run on netbsd, since cgo cannot handle stdout correctly
+if [ "$goos" == "netbsd" ]; then
+	c_go_cgo=""
+fi
 
 timeout="
 	timeout1

misc/cgo/stdio/stdio_netbsd.go

+// Copyright 2009 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.
+
+package stdio
+
+/*
+#include <stdio.h>
+
+extern FILE __sF[3];
+*/
+import "C"
+import "unsafe"
+
+var Stdout = (*File)(unsafe.Pointer(&C.__sF[1]))
+var Stderr = (*File)(unsafe.Pointer(&C.__sF[2]))

src/pkg/go/build/build.go

@@ -213,11 +213,13 @@ var Default Context = defaultContext()
 var cgoEnabled = map[string]bool{
 	"darwin/386":    true,
 	"darwin/amd64":  true,
+	"freebsd/386":   true,
+	"freebsd/amd64": true,
 	"linux/386":     true,
 	"linux/amd64":   true,
 	"linux/arm":     true,
-	"freebsd/386":   true,
-	"freebsd/amd64": true,
+	"netbsd/386":    true,
+	"netbsd/amd64":  true,
 	"windows/386":   true,
 	"windows/amd64": true,
 }

src/pkg/net/cgo_netbsd.go

+// Copyright 2011 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 netbsd
+
+package net
+
+/*
+#include <netdb.h>
+*/
+import "C"
+
+func cgoAddrInfoFlags() C.int {
+<<<<<<< local
+	return C.AI_CANONNAME
+=======
+	return C.AI_CANONNAME | C.AI_V4MAPPED | C.AI_ALL
+>>>>>>> other
+}

src/pkg/net/cgo_unix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux
+// +build darwin freebsd linux netbsd
 
 package net
 

src/pkg/os/user/lookup_unix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux
+// +build darwin freebsd linux netbsd
 // +build cgo
 
 package user

src/pkg/runtime/cgo/gcc_netbsd_386.c

+// Copyright 2009 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 <sys/types.h>
+#include <pthread.h>
+#include <signal.h>
+#include "libcgo.h"
+
+static void* threadentry(void*);
+
+static void
+xinitcgo(G *g)
+{
+	pthread_attr_t attr;
+	size_t size;
+
+	pthread_attr_init(&attr);
+	pthread_attr_getstacksize(&attr, &size);
+	g->stackguard = (uintptr)&attr - size + 4096;
+	pthread_attr_destroy(&attr);
+}
+
+void (*initcgo)(G*) = xinitcgo;
+
+void
+libcgo_sys_thread_start(ThreadStart *ts)
+{
+	pthread_attr_t attr;
+	sigset_t ign, oset;
+	pthread_t p;
+	size_t size;
+	int err;
+
+	sigfillset(&ign);
+	sigprocmask(SIG_SETMASK, &ign, &oset);
+
+	pthread_attr_init(&attr);
+	pthread_attr_getstacksize(&attr, &size);
+	ts->g->stackguard = size;
+	err = pthread_create(&p, &attr, threadentry, ts);
+
+	sigprocmask(SIG_SETMASK, &oset, nil);
+
+	if (err != 0) {
+		fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
+		abort();
+	}
+}
+
+static void*
+threadentry(void *v)
+{
+	ThreadStart ts;
+
+	ts = *(ThreadStart*)v;
+	free(v);
+
+	ts.g->stackbase = (uintptr)&ts;
+
+	/*
+	 * libcgo_sys_thread_start set stackguard to stack size;
+	 * change to actual guard pointer.
+	 */
+	ts.g->stackguard = (uintptr)&ts - ts.g->stackguard + 4096;
+
+	/*
+	 * Set specific keys.  On NetBSD/ELF, the thread local storage
+	 * is just before %gs:0.  Our dynamic 8.out's reserve 8 bytes
+	 * for the two words g and m at %gs:-8 and %gs:-4.
+	 */
+	asm volatile (
+		"movl %0, %%gs:-8\n"	// MOVL g, -8(GS)
+		"movl %1, %%gs:-4\n"	// MOVL m, -4(GS)
+		:: "r"(ts.g), "r"(ts.m)
+	);
+
+	crosscall_386(ts.fn);
+	return nil;
+}

src/pkg/runtime/cgo/gcc_netbsd_amd64.c

+// Copyright 2009 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 <sys/types.h>
+#include <pthread.h>
+#include <signal.h>
+#include "libcgo.h"
+
+static void* threadentry(void*);
+
+static void
+xinitcgo(G *g)
+{
+	pthread_attr_t attr;
+	size_t size;
+
+	pthread_attr_init(&attr);
+	pthread_attr_getstacksize(&attr, &size);
+	g->stackguard = (uintptr)&attr - size + 4096;
+	pthread_attr_destroy(&attr);
+}
+
+void (*initcgo)(G*) = xinitcgo;
+
+void
+libcgo_sys_thread_start(ThreadStart *ts)
+{
+	pthread_attr_t attr;
+	sigset_t ign, oset;
+	pthread_t p;
+	size_t size;
+	int err;
+
+	sigfillset(&ign);
+	sigprocmask(SIG_SETMASK, &ign, &oset);
+
+	pthread_attr_init(&attr);
+	pthread_attr_getstacksize(&attr, &size);
+
+	ts->g->stackguard = size;
+	err = pthread_create(&p, &attr, threadentry, ts);
+
+	sigprocmask(SIG_SETMASK, &oset, nil);
+
+	if (err != 0) {
+		fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
+		abort();
+	}
+}
+
+static void*
+threadentry(void *v)
+{
+	ThreadStart ts;
+
+	ts = *(ThreadStart*)v;
+	free(v);
+
+	ts.g->stackbase = (uintptr)&ts;
+
+	/*
+	 * libcgo_sys_thread_start set stackguard to stack size;
+	 * change to actual guard pointer.
+	 */
+	ts.g->stackguard = (uintptr)&ts - ts.g->stackguard + 4096;
+
+	/*
+	 * Set specific keys.  On NetBSD/ELF, the thread local storage
+	 * is just before %fs:0.  Our dynamic 6.out's reserve 16 bytes
+	 * for the two words g and m at %fs:-16 and %fs:-8.
+	 */
+	asm volatile (
+		"movq %0, %%fs:-16\n"	// MOVL g, -16(FS)
+		"movq %1, %%fs:-8\n"	// MOVL m, -8(FS)
+		:: "r"(ts.g), "r"(ts.m)
+	);
+	crosscall_amd64(ts.fn);
+	return nil;
+}