libgo: update to go1.7rc3

    
    Reviewed-on: https://go-review.googlesource.com/25150


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@238662 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 25 insertions, 0 deletions

diff --git a/libgo/go/internal/syscall/unix/getentropy_openbsd.go b/libgo/go/internal/syscall/unix/getentropy_openbsd.go
new file mode 100644
index 000000000000..d5caa8095a68
--- /dev/null
+++ b/libgo/go/internal/syscall/unix/getentropy_openbsd.go
@@ -0,0 +1,25 @@
+// 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.
+
+package unix
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// getentropy(2)'s syscall number, from /usr/src/sys/kern/syscalls.master
+const entropyTrap uintptr = 7
+
+// GetEntropy calls the OpenBSD getentropy system call.
+func GetEntropy(p []byte) error {
+	_, _, errno := syscall.Syscall(entropyTrap,
+		uintptr(unsafe.Pointer(&p[0])),
+		uintptr(len(p)),
+		0)
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}