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1.1 root 1: /*
2: * Mach Operating System
3: * Copyright (c) 1991,1990 Carnegie Mellon University
4: * All Rights Reserved.
5: *
6: * Permission to use, copy, modify and distribute this software and its
7: * documentation is hereby granted, provided that both the copyright
8: * notice and this permission notice appear in all copies of the
9: * software, derivative works or modified versions, and any portions
10: * thereof, and that both notices appear in supporting documentation.
11: *
12: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15: *
16: * Carnegie Mellon requests users of this software to return to
17: *
18: * Software Distribution Coordinator or [email protected]
19: * School of Computer Science
20: * Carnegie Mellon University
21: * Pittsburgh PA 15213-3890
22: *
23: * any improvements or extensions that they make and grant Carnegie the
24: * rights to redistribute these changes.
25: */
26: /*
1.1.1.3 ! root 27: * db_trap.c,v 1.2 1993/05/20 03:39:34 cgd Exp
! 28: *
1.1 root 29: * HISTORY
1.1.1.3 ! root 30: * db_trap.c,v
! 31: * Revision 1.2 1993/05/20 03:39:34 cgd
! 32: * add explicit rcs id
! 33: *
! 34: * Revision 1.1.1.1 1993/03/21 09:46:27 cgd
1.1.1.2 root 35: * initial import of 386bsd-0.1 sources
36: *
1.1 root 37: * Revision 1.1 1992/03/25 21:45:31 pace
38: * Initial revision
39: *
40: * Revision 2.5 91/02/05 17:07:16 mrt
41: * Changed to new Mach copyright
42: * [91/01/31 16:19:35 mrt]
43: *
44: * Revision 2.4 91/01/08 15:09:17 rpd
45: * Changed db_stop_at_pc's arguments.
46: * Print db_inst_count, db_load_count, db_store_count.
47: * [90/11/27 rpd]
48: *
49: * Revision 2.3 90/10/25 14:44:11 rwd
50: * From rpd.
51: * [90/10/19 17:03:17 rwd]
52: *
53: * Generalized the watchpoint support.
54: * [90/10/16 rwd]
55: * Added watchpoint support.
56: * [90/10/16 rpd]
57: *
58: * Revision 2.2 90/08/27 21:52:52 dbg
59: * Assign to db_dot before calling the print function.
60: * [90/08/20 af]
61: * Reduce lint.
62: * [90/08/07 dbg]
63: * Created.
64: * [90/07/25 dbg]
65: *
66: */
67: /*
68: * Author: David B. Golub, Carnegie Mellon University
69: * Date: 7/90
70: */
71:
72: /*
73: * Trap entry point to kernel debugger.
74: */
75: #include "param.h"
76: #include "proc.h"
77: #include <ddb/db_command.h>
78: #include <ddb/db_break.h>
79:
80: extern void db_restart_at_pc();
81: extern boolean_t db_stop_at_pc();
82:
83: extern int db_inst_count;
84: extern int db_load_count;
85: extern int db_store_count;
86:
87: db_trap(type, code)
88: int type, code;
89: {
90: boolean_t bkpt;
91: boolean_t watchpt;
92:
93: bkpt = IS_BREAKPOINT_TRAP(type, code);
94: watchpt = IS_WATCHPOINT_TRAP(type, code);
95:
96: if (db_stop_at_pc(&bkpt)) {
97: if (db_inst_count) {
98: db_printf("After %d instructions (%d loads, %d stores),\n",
99: db_inst_count, db_load_count, db_store_count);
100: }
101: if (bkpt)
102: db_printf("Breakpoint at\t");
103: else if (watchpt)
104: db_printf("Watchpoint at\t");
105: else
106: db_printf("Stopped at\t");
107: db_dot = PC_REGS(DDB_REGS);
108: db_print_loc_and_inst(db_dot);
109:
110: db_command_loop();
111: }
112:
113: db_restart_at_pc(watchpt);
114: }
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