$OpenBSD: patch-src_syscall_mksyscall_pl,v 1.1 2021/03/02 17:56:41 jsing Exp $

Index: src/syscall/mksyscall.pl
--- src/syscall/mksyscall.pl.orig
+++ src/syscall/mksyscall.pl
@@ -185,6 +185,10 @@ while(<>) {
 			if (!$libc) {
 				push @args, "0";
 			}
+			if($libc && $arm && @args % 2) {
+				# arm abi specifies 64 bit argument must be 64 bit aligned.
+				push @args, "0"
+			}
 			if($_32bit eq "big-endian") {
 				push @args, "uintptr($name>>32)", "uintptr($name)";
 			} elsif($_32bit eq "little-endian") {
