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Diffstat (limited to 'src/syscall/sockcmsg_dragonfly.go')
-rw-r--r--src/syscall/sockcmsg_dragonfly.go16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/syscall/sockcmsg_dragonfly.go b/src/syscall/sockcmsg_dragonfly.go
new file mode 100644
index 0000000..d217d9e
--- /dev/null
+++ b/src/syscall/sockcmsg_dragonfly.go
@@ -0,0 +1,16 @@
+// Copyright 2019 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 syscall
+
+// Round the length of a raw sockaddr up to align it properly.
+func cmsgAlignOf(salen int) int {
+ salign := sizeofPtr
+ if sizeofPtr == 8 && !supportsABI(_dragonflyABIChangeVersion) {
+ // 64-bit Dragonfly before the September 2019 ABI changes still requires
+ // 32-bit aligned access to network subsystem.
+ salign = 4
+ }
+ return (salen + salign - 1) & ^(salign - 1)
+}