1 files changed, 79 insertions, 0 deletions
diff --git a/sys/ddb/db_trap.c b/sys/ddb/db_trap.c
new file mode 100644
index 0000000..abfa770
--- /dev/null
+++ b/sys/ddb/db_trap.c
@@ -0,0 +1,79 @@
+/* 
+ * 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.
+ *
+ *	$Id: db_trap.c,v 1.2 1993/10/16 16:47:28 rgrimes Exp $
+ */
+
+/*
+ * 	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+
+/*
+ * Trap entry point to kernel debugger.
+ */
+#include "param.h"
+#include "systm.h"
+#include "proc.h"
+#include "ddb/ddb.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;
+
+void
+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);
+}