syscall: use correct cmsg alignment for netbsd/arm64

netbsd/arm64 requires 128-bit alignment for cmsgs. Re-submit of CL 258437 which was dropped due to #41718. Change-Id: I898043d79f513bebe1a5eb931e7ebd8e291a5aec Reviewed-on: https://go-review.googlesource.com/c/go/+/258677 Trust: Tobias Klauser <[email protected]> Trust: Benny Siegert <[email protected]> Run-TryBot: Tobias Klauser <[email protected]> TryBot-Result: Go Bot <[email protected]> Reviewed-by: Benny Siegert <[email protected]>
cloudflare · Oct 1, 2020 · 069aef4 · 069aef4
1 parent 9b1518a
commit 069aef4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/syscall/sockcmsg_unix_other.go b/src/syscall/sockcmsg_unix_other.go
@@ -32,6 +32,10 @@ func cmsgAlignOf(salen int) int {
  if runtime.GOARCH == "arm" {
  salign = 8
  }
+ // NetBSD aarch64 requires 128-bit alignment.
+ if runtime.GOOS == "netbsd" && runtime.GOARCH == "arm64" {
+ salign = 16
+ }
  }
 
  return (salen + salign - 1) & ^(salign - 1)