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-rw-r--r--sim/common/sim-watch.c458
1 files changed, 458 insertions, 0 deletions
diff --git a/sim/common/sim-watch.c b/sim/common/sim-watch.c
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+++ b/sim/common/sim-watch.c
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+/* Generic simulator watchpoint support.
+ Copyright (C) 1997 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 2, 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
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+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, write to the Free Software Foundation, Inc.,
+59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "sim-main.h"
+#include "sim-options.h"
+
+#include "sim-assert.h"
+
+#include <ctype.h>
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+enum {
+ OPTION_WATCH_DELETE = OPTION_START,
+
+ OPTION_WATCH_INFO,
+ OPTION_WATCH_CLOCK,
+ OPTION_WATCH_CYCLES,
+ OPTION_WATCH_PC,
+
+ OPTION_WATCH_OP,
+};
+
+
+/* Break an option number into its op/int-nr */
+static watchpoint_type
+option_to_type (SIM_DESC sd,
+ int option)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ watchpoint_type type = ((option - OPTION_WATCH_OP)
+ / (watch->nr_interrupts + 1));
+ SIM_ASSERT (type >= 0 && type < nr_watchpoint_types);
+ return type;
+}
+
+static int
+option_to_interrupt_nr (SIM_DESC sd,
+ int option)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ int interrupt_nr = ((option - OPTION_WATCH_OP)
+ % (watch->nr_interrupts + 1));
+ return interrupt_nr;
+}
+
+static int
+type_to_option (SIM_DESC sd,
+ watchpoint_type type,
+ int interrupt_nr)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ return ((type * (watch->nr_interrupts + 1))
+ + interrupt_nr
+ + OPTION_WATCH_OP);
+}
+
+
+/* Delete one or more watchpoints. Fail if no watchpoints were found */
+
+static SIM_RC
+do_watchpoint_delete (SIM_DESC sd,
+ int ident,
+ watchpoint_type type)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ sim_watch_point **entry = &watch->points;
+ SIM_RC status = SIM_RC_FAIL;
+ while ((*entry) != NULL)
+ {
+ if ((*entry)->ident == ident
+ || (*entry)->type == type)
+ {
+ sim_watch_point *dead = (*entry);
+ (*entry) = (*entry)->next;
+ sim_events_deschedule (sd, dead->event);
+ zfree (dead);
+ status = SIM_RC_OK;
+ }
+ else
+ entry = &(*entry)->next;
+ }
+ return status;
+}
+
+static char *
+watchpoint_type_to_str (SIM_DESC sd,
+ watchpoint_type type)
+{
+ switch (type)
+ {
+ case pc_watchpoint:
+ return "pc";
+ case clock_watchpoint:
+ return "clock";
+ case cycles_watchpoint:
+ return "cycles";
+ case invalid_watchpoint:
+ case nr_watchpoint_types:
+ return "(invalid-type)";
+ }
+ return NULL;
+}
+
+static char *
+interrupt_nr_to_str (SIM_DESC sd,
+ int interrupt_nr)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ if (interrupt_nr < 0)
+ return "(invalid-interrupt)";
+ else if (interrupt_nr >= watch->nr_interrupts)
+ return "breakpoint";
+ else
+ return watch->interrupt_names[interrupt_nr];
+}
+
+
+static void
+do_watchpoint_info (SIM_DESC sd)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ sim_watch_point *point;
+ sim_io_printf (sd, "Watchpoints:\n");
+ for (point = watch->points; point != NULL; point = point->next)
+ {
+ sim_io_printf (sd, "%3d: watch %s %s ",
+ point->ident,
+ watchpoint_type_to_str (sd, point->type),
+ interrupt_nr_to_str (sd, point->interrupt_nr));
+ if (point->is_periodic)
+ sim_io_printf (sd, "+");
+ if (!point->is_within)
+ sim_io_printf (sd, "!");
+ sim_io_printf (sd, "0x%lx", point->arg0);
+ if (point->arg1 != point->arg0)
+ sim_io_printf (sd, ",0x%lx", point->arg1);
+ sim_io_printf (sd, "\n");
+ }
+}
+
+
+
+static sim_event_handler handle_watchpoint;
+
+static SIM_RC
+schedule_watchpoint (SIM_DESC sd,
+ sim_watch_point *point)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ switch (point->type)
+ {
+ case pc_watchpoint:
+ point->event = sim_events_watch_sim (sd,
+ watch->pc,
+ watch->sizeof_pc,
+ 0/* host-endian */,
+ point->is_within,
+ point->arg0, point->arg1,
+ /* PC in arg0..arg1 */
+ handle_watchpoint,
+ point);
+ return SIM_RC_OK;
+ case clock_watchpoint:
+ point->event = sim_events_watch_clock (sd,
+ point->arg0, /* ms time */
+ handle_watchpoint,
+ point);
+ return SIM_RC_OK;
+ case cycles_watchpoint:
+ point->event = sim_events_schedule (sd,
+ point->arg0, /* time */
+ handle_watchpoint,
+ point);
+ return SIM_RC_OK;
+ default:
+ sim_engine_abort (sd, NULL, NULL_CIA,
+ "handle_watchpoint - internal error - bad switch");
+ return SIM_RC_FAIL;
+ }
+ return SIM_RC_OK;
+}
+
+
+static void
+handle_watchpoint (SIM_DESC sd, void *data)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ sim_watch_point *point = (sim_watch_point *) data;
+ int interrupt_nr = point->interrupt_nr;
+
+ if (point->is_periodic)
+ /* reschedule this event before processing it */
+ schedule_watchpoint (sd, point);
+ else
+ do_watchpoint_delete (sd, point->ident, invalid_watchpoint);
+
+ if (point->interrupt_nr == watch->nr_interrupts)
+ sim_engine_halt (sd, NULL, NULL, NULL_CIA, sim_stopped, SIM_SIGINT);
+ else
+ watch->interrupt_handler (sd, &watch->interrupt_names[interrupt_nr]);
+}
+
+
+static SIM_RC
+do_watchpoint_create (SIM_DESC sd,
+ watchpoint_type type,
+ int opt,
+ char *arg)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ sim_watch_point **point;
+
+ /* create the watchpoint */
+ point = &watch->points;
+ while ((*point) != NULL)
+ point = &(*point)->next;
+ (*point) = ZALLOC (sim_watch_point);
+
+ /* fill in the details */
+ (*point)->ident = ++(watch->last_point_nr);
+ (*point)->type = option_to_type (sd, opt);
+ (*point)->interrupt_nr = option_to_interrupt_nr (sd, opt);
+ /* prefixes to arg - +== periodic, !==not or outside */
+ (*point)->is_within = 1;
+ while (1)
+ {
+ if (arg[0] == '+')
+ (*point)->is_periodic = 1;
+ else if (arg[0] == '!')
+ (*point)->is_within = 0;
+ else
+ break;
+ arg++;
+ }
+
+ (*point)->arg0 = strtoul (arg, &arg, 0);
+ if (arg[0] == ',')
+ (*point)->arg0 = strtoul (arg, NULL, 0);
+ else
+ (*point)->arg1 = (*point)->arg0;
+
+ /* schedule it */
+ schedule_watchpoint (sd, (*point));
+
+ return SIM_RC_OK;
+}
+
+
+static SIM_RC
+watchpoint_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
+ char *arg, int is_command)
+{
+ if (opt >= OPTION_WATCH_OP)
+ return do_watchpoint_create (sd, clock_watchpoint, opt, arg);
+ else
+ switch (opt)
+ {
+
+ case OPTION_WATCH_DELETE:
+ if (isdigit ((int) arg[0]))
+ {
+ int ident = strtol (arg, NULL, 0);
+ if (do_watchpoint_delete (sd, ident, invalid_watchpoint)
+ != SIM_RC_OK)
+ {
+ sim_io_eprintf (sd, "Watchpoint %d not found\n", ident);
+ return SIM_RC_FAIL;
+ }
+ return SIM_RC_OK;
+ }
+ else if (strcasecmp (arg, "all") == 0)
+ {
+ watchpoint_type type;
+ for (type = invalid_watchpoint + 1;
+ type < nr_watchpoint_types;
+ type++)
+ {
+ do_watchpoint_delete (sd, 0, type);
+ }
+ return SIM_RC_OK;
+ }
+ else if (strcasecmp (arg, "pc") == 0)
+ {
+ if (do_watchpoint_delete (sd, 0, pc_watchpoint)
+ != SIM_RC_OK)
+ {
+ sim_io_eprintf (sd, "No PC watchpoints found\n");
+ return SIM_RC_FAIL;
+ }
+ return SIM_RC_OK;
+ }
+ else if (strcasecmp (arg, "clock") == 0)
+ {
+ if (do_watchpoint_delete (sd, 0, clock_watchpoint) != SIM_RC_OK)
+ {
+ sim_io_eprintf (sd, "No CLOCK watchpoints found\n");
+ return SIM_RC_FAIL;
+ }
+ return SIM_RC_OK;
+ }
+ else if (strcasecmp (arg, "cycles") == 0)
+ {
+ if (do_watchpoint_delete (sd, 0, cycles_watchpoint) != SIM_RC_OK)
+ {
+ sim_io_eprintf (sd, "No CYCLES watchpoints found\n");
+ return SIM_RC_FAIL;
+ }
+ return SIM_RC_OK;
+ }
+ sim_io_eprintf (sd, "Unknown watchpoint type `%s'\n", arg);
+ return SIM_RC_FAIL;
+
+ case OPTION_WATCH_INFO:
+ {
+ do_watchpoint_info (sd);
+ return SIM_RC_OK;
+ }
+
+ default:
+ sim_io_eprintf (sd, "Unknown watch option %d\n", opt);
+ return SIM_RC_FAIL;
+
+ }
+
+}
+
+
+static SIM_RC
+sim_watchpoint_init (SIM_DESC sd)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ sim_watch_point *point;
+ /* NOTE: Do not need to de-schedule any previous watchpoints as
+ sim-events has already done this */
+ /* schedule any watchpoints enabled by command line options */
+ for (point = watch->points; point != NULL; point = point->next)
+ {
+ schedule_watchpoint (sd, point);
+ }
+ return SIM_RC_OK;
+}
+
+
+static const OPTION watchpoint_options[] =
+{
+ { {"watch-delete", required_argument, NULL, OPTION_WATCH_DELETE },
+ '\0', "IDENT|all|pc|cycles|clock", "Delete a watchpoint",
+ watchpoint_option_handler },
+
+ { {"watch-info", no_argument, NULL, OPTION_WATCH_INFO },
+ '\0', NULL, "List scheduled watchpoints",
+ watchpoint_option_handler },
+
+ { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
+};
+
+static char *default_interrupt_names[] = { "int", 0, };
+
+
+
+SIM_RC
+sim_watchpoint_install (SIM_DESC sd)
+{
+ sim_watchpoints *watch = STATE_WATCHPOINTS (sd);
+ SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
+ /* the basic command set */
+ sim_module_add_init_fn (sd, sim_watchpoint_init);
+ sim_add_option_table (sd, NULL, watchpoint_options);
+ /* fill in some details */
+ if (watch->interrupt_names == NULL)
+ watch->interrupt_names = default_interrupt_names;
+ watch->nr_interrupts = 0;
+ while (watch->interrupt_names[watch->nr_interrupts] != NULL)
+ watch->nr_interrupts++;
+ /* generate more advansed commands */
+ {
+ OPTION *int_options = NZALLOC (OPTION, 1 + (watch->nr_interrupts + 1) * nr_watchpoint_types);
+ int interrupt_nr;
+ for (interrupt_nr = 0; interrupt_nr <= watch->nr_interrupts; interrupt_nr++)
+ {
+ watchpoint_type type;
+ for (type = 0; type < nr_watchpoint_types; type++)
+ {
+ char *name;
+ int nr = interrupt_nr * nr_watchpoint_types + type;
+ OPTION *option = &int_options[nr];
+ asprintf (&name, "watch-%s-%s",
+ watchpoint_type_to_str (sd, type),
+ interrupt_nr_to_str (sd, interrupt_nr));
+ option->opt.name = name;
+ option->opt.has_arg = required_argument;
+ option->opt.val = type_to_option (sd, type, interrupt_nr);
+ option->doc = "";
+ option->doc_name = "";
+ option->handler = watchpoint_option_handler;
+ }
+ }
+ /* adjust first few entries so that they contain real
+ documentation, the first entry includes a list of actions. */
+ {
+ char *prefix =
+ "Watch the simulator, take ACTION in COUNT cycles (`+' for every COUNT cycles), ACTION is";
+ char *doc;
+ int len = strlen (prefix) + 1;
+ for (interrupt_nr = 0; interrupt_nr <= watch->nr_interrupts; interrupt_nr++)
+ len += strlen (interrupt_nr_to_str (sd, interrupt_nr)) + 1;
+ doc = NZALLOC (char, len);
+ strcpy (doc, prefix);
+ for (interrupt_nr = 0; interrupt_nr <= watch->nr_interrupts; interrupt_nr++)
+ {
+ strcat (doc, " ");
+ strcat (doc, interrupt_nr_to_str (sd, interrupt_nr));
+ }
+ int_options[0].doc_name = "watch-cycles-ACTION";
+ int_options[0].arg = "[+]COUNT";
+ int_options[0].doc = doc;
+ }
+ int_options[1].doc_name = "watch-pc-ACTION";
+ int_options[1].arg = "[!]ADDRESS";
+ int_options[1].doc =
+ "Watch the PC, take ACTION when matches ADDRESS (in range ADDRESS,ADDRESS), `!' negates test";
+ int_options[2].doc_name = "watch-clock-ACTION";
+ int_options[2].arg = "[+]MILLISECONDS";
+ int_options[2].doc =
+ "Watch the clock, take ACTION after MILLISECONDS (`+' for every MILLISECONDS)";
+
+ sim_add_option_table (sd, NULL, int_options);
+ }
+ return SIM_RC_OK;
+}
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