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diff --git a/hurd/crash.defs b/hurd/crash.defs
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+/* MiG protocol for handling program crashes.
+   Copyright (C) 1992, 1994, 1995, 1996 Free Software Foundation, Inc.
+
+This file is part of the GNU Hurd.
+
+The GNU Hurd is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU Hurd 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU Hurd; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Written by Roland McGrath.  */
+
+subsystem crash 32000;
+
+#include <hurd/hurd_types.defs>
+
+/* Handle a crashing task, whose task control port is TASK.
+
+   FILE is a file port open for writing.  The caller will link it to "core"
+   (or whatever name) if the RPC returns success.
+
+   SIGNO, SIGCODE, and SIGERROR indicate the signal that killed the
+   process.  EXC is zero for a software signal; otherwise EXC, CODE, and
+   SUBCODE are the original Mach exception codes.
+
+   CTTYID_PORT is the process's ctty's identification port, for use
+   in sending stop signals to the process group.  */
+
+routine crash_dump_task (
+	crashserver: mach_port_t;
+	sreplyport reply: sreply_port_t;
+	task: task_t;
+	file: file_t;
+	signo: int; sigcode: integer_t; sigerror: int;
+	exc: natural_t; code: natural_t; subcode: natural_t;
+	cttyid_port: mach_port_send_t);