1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* 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.
*
* $FreeBSD$
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*/
/*
* Trap entry point to kernel debugger.
*/
#include <sys/param.h>
#include <ddb/ddb.h>
#include <ddb/db_command.h>
#include <setjmp.h>
extern jmp_buf db_jmpbuf;
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);
if (setjmp(db_jmpbuf) == 0)
db_print_loc_and_inst(db_dot);
db_command_loop();
}
db_restart_at_pc(watchpt);
}
|
