--- Gnu-Mach/kern/syscall_subr.h	2020/09/02 04:36:56	1.1
+++ Gnu-Mach/kern/syscall_subr.h	2020/09/02 04:45:10	1.1.1.3
@@ -1,35 +1,41 @@
-/* 
+/*
  * Mach Operating System
  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  * All Rights Reserved.
- * 
+ *
  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.
- * 
+ *
  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- * 
+ *
  * Carnegie Mellon requests users of this software to return to
- * 
+ *
  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  *  School of Computer Science
  *  Carnegie Mellon University
  *  Pittsburgh PA 15213-3890
- * 
+ *
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
 
+#include <sys/types.h>
+#include <mach/mach_types.h>
+#include <kern/kern_types.h>
+
 #ifndef	_KERN_SYSCALL_SUBR_H_
 #define _KERN_SYSCALL_SUBR_H_
 
-extern int	swtch();
-extern int	swtch_pri();
-extern int	thread_switch();
-extern void	thread_depress_timeout();
+extern int	swtch(void);
+extern int	swtch_pri(int);
+extern int	thread_switch(mach_port_t, int, mach_msg_timeout_t);
+extern void	thread_depress_timeout(thread_t);
+extern kern_return_t thread_depress_abort(thread_t);
+extern void	mach_print(const char *);
 
-#endif	_KERN_SYSCALL_SUBR_H_
+#endif	/* _KERN_SYSCALL_SUBR_H_ */