From f07a4c844da9f0ecae5bbee1ab94be56505f26f7 Mon Sep 17 00:00:00 2001
From: Thomas Bushnell <thomas@gnu.org>
Date: Tue, 25 Feb 1997 21:28:37 +0000
Subject: Initial source

---
 ddb/db_trap.c | 107 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 ddb/db_trap.c

(limited to 'ddb/db_trap.c')

diff --git a/ddb/db_trap.c b/ddb/db_trap.c
new file mode 100644
index 0000000..dbb5892
--- /dev/null
+++ b/ddb/db_trap.c
@@ -0,0 +1,107 @@
+/* 
+ * 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 "AS IS"
+ * 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 Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * 	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+
+#include "mach_kdb.h"
+#if MACH_KDB
+
+/*
+ * Trap entry point to kernel debugger.
+ */
+#include <mach/boolean.h>
+#include <machine/db_machdep.h>
+#include <ddb/db_command.h>
+#include <ddb/db_access.h>
+#include <ddb/db_break.h>
+#include <ddb/db_task_thread.h>
+
+
+
+extern jmp_buf_t *db_recover;
+
+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_task_trap(type, code, user_space)
+	int	  type, code;
+	boolean_t user_space;
+{
+	jmp_buf_t db_jmpbuf;
+	jmp_buf_t *prev;
+	boolean_t	bkpt;
+	boolean_t	watchpt;
+	void		db_init_default_thread();
+	void		db_check_breakpoint_valid();
+	task_t		task_space;
+
+	task_space = db_target_space(current_thread(), user_space);
+	bkpt = IS_BREAKPOINT_TRAP(type, code);
+	watchpt = IS_WATCHPOINT_TRAP(type, code);
+
+	db_init_default_thread();
+	db_check_breakpoint_valid();
+	if (db_stop_at_pc(&bkpt, task_space)) {
+	    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  ");
+	    else if (watchpt)
+		db_printf("Watchpoint at  ");
+	    else
+		db_printf("Stopped at  ");
+	    db_dot = PC_REGS(DDB_REGS);
+
+	    prev = db_recover;
+	    if (_setjmp(db_recover = &db_jmpbuf) == 0)
+		db_print_loc_and_inst(db_dot, task_space);
+	    else
+		db_printf("Trouble printing location %#X.\n", db_dot);
+	    db_recover = prev;
+
+	    db_command_loop();
+	}
+
+	db_restart_at_pc(watchpt, task_space);
+}
+
+void
+db_trap(type, code)
+	int	type, code;
+{
+	db_task_trap(type, code, !DB_VALID_KERN_ADDR(PC_REGS(DDB_REGS)));
+}
+
+#endif MACH_KDB
-- 
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