Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 458 insertions, 0 deletions

diff --git a/sim/common/sim-watch.c b/sim/common/sim-watch.c
new file mode 100644
index 0000000..75c9ad1
--- /dev/null
+++ b/sim/common/sim-watch.c
@@ -0,0 +1,458 @@
+/* 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;
+}