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diff --git a/contrib/gdb/gdb/gnu-nat.h b/contrib/gdb/gdb/gnu-nat.h
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+++ b/contrib/gdb/gdb/gnu-nat.h
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+/* Common things used by the various *gnu-nat.c files
+   Copyright 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef __GNU_NAT_H__
+#define __GNU_NAT_H__
+
+#include <unistd.h>
+#include <mach.h>
+
+struct inf;
+
+extern struct inf *current_inferior;
+
+/* Converts a GDB pid to a struct proc.  */
+struct proc *inf_tid_to_thread (struct inf *inf, int tid);
+
+/* Makes sure that INF's thread list is synced with the actual process.  */
+int inf_update_procs (struct inf *inf);
+
+/* A proc is either a thread, or the task (there can only be one task proc
+   because it always has the same TID, PROC_TID_TASK).  */
+struct proc
+  {
+    thread_t port;		/* The task or thread port.  */
+    int tid;			/* The GDB pid (actually a thread id).  */
+    int num;			/* An id number for threads, to print.  */
+
+    mach_port_t saved_exc_port;	/* The task/thread's real exception port.  */
+    mach_port_t exc_port;	/* Our replacement, which for.  */
+
+    int sc;			/* Desired suspend count.   */
+    int cur_sc;			/* Implemented suspend count.  */
+    int run_sc;			/* Default sc when the program is running. */
+    int pause_sc;		/* Default sc when gdb has control. */
+    int resume_sc;		/* Sc resulting from the last resume. */
+    int detach_sc;		/* SC to leave around when detaching
+				   from program. */
+
+    thread_state_data_t state;	/* Registers, &c. */
+    int state_valid:1;		/* True if STATE is up to date. */
+    int state_changed:1;
+
+    int aborted:1;		/* True if thread_abort has been called.  */
+    int dead:1;			/* We happen to know it's actually dead. */
+
+    /* Bit mask of registers fetched by gdb.  This is used when we re-fetch
+       STATE after aborting the thread, to detect that gdb may have out-of-date
+       information.  */
+    unsigned long fetched_regs;
+
+    struct inf *inf;		/* Where we come from.  */
+
+    struct proc *next;
+  };
+
+/* The task has a thread entry with this TID.  */
+#define PROC_TID_TASK 	(-1)
+
+#define proc_is_task(proc) ((proc)->tid == PROC_TID_TASK)
+#define proc_is_thread(proc) ((proc)->tid != PROC_TID_TASK)
+
+extern int __proc_pid (struct proc *proc);
+
+/* Make sure that the state field in PROC is up to date, and return a
+   pointer to it, or 0 if something is wrong.  If WILL_MODIFY is true,
+   makes sure that the thread is stopped and aborted first, and sets
+   the state_changed field in PROC to true.  */
+extern thread_state_t proc_get_state (struct proc *proc, int will_modify);
+
+/* Return printable description of proc.  */
+extern char *proc_string (struct proc *proc);
+
+#define proc_debug(_proc, msg, args...) \
+  do { struct proc *__proc = (_proc); \
+       debug ("{proc %d/%d %p}: " msg, \
+	      __proc_pid (__proc), __proc->tid, __proc , ##args); } while (0)
+
+extern int gnu_debug_flag;
+
+#define debug(msg, args...) \
+ do { if (gnu_debug_flag) \
+        fprintf_unfiltered (gdb_stdlog, "%s:%d: " msg "\r\n", __FILE__ , __LINE__ , ##args); } while (0)
+
+#endif /* __GNU_NAT_H__ */