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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990 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 
+ * 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 the
+ * rights to redistribute these changes.
+ */
+/*
+ * HISTORY
+ * $Log: db_variables.h,v $
+ * Revision 1.1  1992/03/25  21:45:35  pace
+ * Initial revision
+ *
+ * Revision 2.3  91/02/05  17:07:23  mrt
+ * 	Changed to new Mach copyright
+ * 	[91/01/31  16:19:54  mrt]
+ * 
+ * Revision 2.2  90/08/27  21:53:40  dbg
+ * 	Modularized typedef name.  Documented the calling sequence of
+ * 	the (optional) access function of a variable.  Now the valuep
+ * 	field can be made opaque, eg be an offset that fcn() resolves.
+ * 	[90/08/20            af]
+ * 
+ * 	Created.
+ * 	[90/07/25            dbg]
+ * 
+ */
+/*
+ * 	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+
+#ifndef	_DB_VARIABLES_H_
+#define	_DB_VARIABLES_H_
+
+/*
+ * Debugger variables.
+ */
+struct db_variable {
+	char	*name;		/* Name of variable */
+	int	*valuep;	/* value of variable */
+				/* function to call when reading/writing */
+	int	(*fcn)(/* db_variable *vp, db_expr_t *valuep, int op */);
+#define DB_VAR_GET	0
+#define DB_VAR_SET	1
+};
+#define	FCN_NULL	((int (*)())0)
+
+extern struct db_variable	db_vars[];	/* debugger variables */
+extern struct db_variable	*db_evars;
+extern struct db_variable	db_regs[];	/* machine registers */
+extern struct db_variable	*db_eregs;
+
+#endif	/* _DB_VARIABLES_H_ */