sim/common/sim-watch.h

   1 /* Simulator watchpoint support.
   2    Copyright (C) 1997-2021 Free Software Foundation, Inc.
   3    Contributed by Cygnus Support.
   4
   5 This file is part of GDB, the GNU debugger.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #ifndef SIM_WATCH_H
  22 #define SIM_WATCH_H
  23
  24 typedef enum {
  25   invalid_watchpoint = -1,
  26   pc_watchpoint,
  27   clock_watchpoint,
  28   cycles_watchpoint,
  29   nr_watchpoint_types,
  30 } watchpoint_type;
  31
  32 typedef struct _sim_watch_point sim_watch_point;
  33 struct _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
  46 typedef 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
  53   /* Pointer to the handler for interrupt watchpoints */
  54   /* FIXME: can this be done better? */
  55   /* NOTE: For the DATA arg, the handler is passed a (char**) pointer
  56      that is an offset into the INTERRUPT_NAMES vector.  Use
  57      arithmetic to determine the interrupt-nr. */
  58   sim_event_handler *interrupt_handler;
  59
  60   /* Pointer to a null terminated list of interrupt names */
  61   /* FIXME: can this be done better?  Look at the PPC's interrupt
  62      mechanism and table for a rough idea of where it will go next */
  63   int nr_interrupts;
  64   const char **interrupt_names;
  65
  66   /* active watchpoints */
  67   int last_point_nr;
  68   sim_watch_point *points;
  69
  70 } sim_watchpoints;
  71
  72 /* Watch install handler.  */
  73 MODULE_INSTALL_FN sim_watchpoint_install;
  74
  75 #endif /* SIM_WATCH_H */