sim/common/sim-watch.h

   1 /* Simulator watchpoint support.
   2    Copyright (C) 1997 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 2, or (at your option)
  10 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 along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21
  22 #ifndef SIM_WATCH_H
  23 #define SIM_WATCH_H
  24
  25 typedef enum {
  26   invalid_watchpoint = -1,
  27   pc_watchpoint,
  28   clock_watchpoint,
  29   cycles_watchpoint,
  30   nr_watchpoint_types,
  31 } watchpoint_type;
  32
  33 typedef struct _sim_watch_point sim_watch_point;
  34 struct _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
  47 typedef 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   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.  */
  76 MODULE_INSTALL_FN sim_watchpoint_install;
  77
  78 #endif /* SIM_WATCH_H */