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/* Simulator watchpoint support.
Copyright (C) 1997-2021 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB, the GNU debugger.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <>. */
#ifndef SIM_WATCH_H
#define SIM_WATCH_H
typedef enum {
invalid_watchpoint = -1,
} watchpoint_type;
typedef struct _sim_watch_point sim_watch_point;
struct _sim_watch_point {
int ident;
watchpoint_type type;
int interrupt_nr; /* == nr_interrupts -> breakpoint */
int is_periodic;
int is_within;
unsigned long arg0;
unsigned long arg1;
sim_event *event;
sim_watch_point *next;
typedef struct _sim_watchpoints {
/* Pointer into the host's data structures specifying the
address/size of the program-counter */
/* FIXME: In the future this shall be generalized so that any of the
N processors M registers can be watched */
/* Pointer to the handler for interrupt watchpoints */
/* FIXME: can this be done better? */
/* NOTE: For the DATA arg, the handler is passed a (char**) pointer
that is an offset into the INTERRUPT_NAMES vector. Use
arithmetic to determine the interrupt-nr. */
sim_event_handler *interrupt_handler;
/* Pointer to a null terminated list of interrupt names */
/* FIXME: can this be done better? Look at the PPC's interrupt
mechanism and table for a rough idea of where it will go next */
int nr_interrupts;
const char **interrupt_names;
/* active watchpoints */
int last_point_nr;
sim_watch_point *points;
} sim_watchpoints;
/* Watch install handler. */
MODULE_INSTALL_FN sim_watchpoint_install;
#endif /* SIM_WATCH_H */