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