1 files changed, 106 insertions, 0 deletions
diff --git a/sys/ddb/db_trap.c b/sys/ddb/db_trap.c
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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_trap.c,v $
+ * Revision 1.1  1992/03/25  21:45:31  pace
+ * Initial revision
+ *
+ * Revision 2.5  91/02/05  17:07:16  mrt
+ * 	Changed to new Mach copyright
+ * 	[91/01/31  16:19:35  mrt]
+ * 
+ * Revision 2.4  91/01/08  15:09:17  rpd
+ * 	Changed db_stop_at_pc's arguments.
+ * 	Print db_inst_count, db_load_count, db_store_count.
+ * 	[90/11/27            rpd]
+ * 
+ * Revision 2.3  90/10/25  14:44:11  rwd
+ * 	From rpd.
+ * 	[90/10/19  17:03:17  rwd]
+ * 
+ * 	Generalized the watchpoint support.
+ * 	[90/10/16            rwd]
+ * 	Added watchpoint support.
+ * 	[90/10/16            rpd]
+ * 
+ * Revision 2.2  90/08/27  21:52:52  dbg
+ * 	Assign to db_dot before calling the print function.
+ * 	[90/08/20            af]
+ * 	Reduce lint.
+ * 	[90/08/07            dbg]
+ * 	Created.
+ * 	[90/07/25            dbg]
+ * 
+ */
+/*
+ * 	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+
+/*
+ * Trap entry point to kernel debugger.
+ */
+#include "param.h"
+#include "proc.h"
+#include <ddb/db_command.h>
+#include <ddb/db_break.h>
+
+extern void		db_restart_at_pc();
+extern boolean_t	db_stop_at_pc();
+
+extern int		db_inst_count;
+extern int		db_load_count;
+extern int		db_store_count;
+
+db_trap(type, code)
+	int	type, code;
+{
+	boolean_t	bkpt;
+	boolean_t	watchpt;
+
+	bkpt = IS_BREAKPOINT_TRAP(type, code);
+	watchpt = IS_WATCHPOINT_TRAP(type, code);
+
+	if (db_stop_at_pc(&bkpt)) {
+	    if (db_inst_count) {
+		db_printf("After %d instructions (%d loads, %d stores),\n",
+			  db_inst_count, db_load_count, db_store_count);
+	    }
+	    if (bkpt)
+		db_printf("Breakpoint at\t");
+	    else if (watchpt)
+		db_printf("Watchpoint at\t");
+	    else
+		db_printf("Stopped at\t");
+	    db_dot = PC_REGS(DDB_REGS);
+	    db_print_loc_and_inst(db_dot);
+
+	    db_command_loop();
+	}
+
+	db_restart_at_pc(watchpt);
+}