1/* Simulator watchpoint support.
2   Copyright (C) 1997, 2007, 2008, 2009, 2010, 2011
3   Free Software Foundation, Inc.
4   Contributed by Cygnus Support.
5
6This file is part of GDB, the GNU debugger.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 3 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
20
21
22#ifndef SIM_WATCH_H
23#define SIM_WATCH_H
24
25typedef enum {
26  invalid_watchpoint = -1,
27  pc_watchpoint,
28  clock_watchpoint,
29  cycles_watchpoint,
30  nr_watchpoint_types,
31} watchpoint_type;
32
33typedef struct _sim_watch_point sim_watch_point;
34struct _sim_watch_point {
35  int ident;
36  watchpoint_type type;
37  int interrupt_nr; /* == nr_interrupts -> breakpoint */
38  int is_periodic;
39  int is_within;
40  unsigned long arg0;
41  unsigned long arg1;
42  sim_event *event;
43  sim_watch_point *next;
44};
45
46
47typedef struct _sim_watchpoints {
48
49  /* Pointer into the host's data structures specifying the
50     address/size of the program-counter */
51  /* FIXME: In the future this shall be generalized so that any of the
52     N processors M registers can be watched */
53  void *pc;
54  int sizeof_pc;
55
56  /* Pointer to the handler for interrupt watchpoints */
57  /* FIXME: can this be done better? */
58  /* NOTE: For the DATA arg, the handler is passed a (char**) pointer
59     that is an offset into the INTERRUPT_NAMES vector.  Use
60     arithmetic to determine the interrupt-nr. */
61  sim_event_handler *interrupt_handler;
62
63  /* Pointer to a null terminated list of interrupt names */
64  /* FIXME: can this be done better?  Look at the PPC's interrupt
65     mechanism and table for a rough idea of where it will go next */
66  int nr_interrupts;
67  const char **interrupt_names;
68
69  /* active watchpoints */
70  int last_point_nr;
71  sim_watch_point *points;
72
73} sim_watchpoints;
74
75/* Watch install handler.  */
76MODULE_INSTALL_FN sim_watchpoint_install;
77
78#endif /* SIM_WATCH_H */
79