mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
458 lines
12 KiB
C
458 lines
12 KiB
C
/* Generic simulator watchpoint support.
|
|
Copyright (C) 1997, 2007, 2008, 2009 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
|
|
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, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#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;
|
|
}
|