or1k: Linux Syscall Interface

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

sysdeps/unix/sysv/linux/or1k/sysdep.c

@@ -0,0 +1,34 @@
+/* OpenRISC wrapper for setting errno.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <errno.h>
+
+long int __syscall_error (long int err);
+hidden_proto (__syscall_error)
+
+/* This routine is jumped to by all the syscall handlers, to stash
+   an error number into errno.  */
+long int
+__syscall_error (long int err)
+{
+  __set_errno (- err);
+  return -1;
+}
+hidden_def (__syscall_error)