Record GDB 7.5 branch creation. Bump version number
[deliverable/binutils-gdb.git] / gdb / infrun.c
index 81b6f5cb4a2d85c24c3341cb48f506bb206e9843..11f981f9f2f3fe4be1b65ccf61f48cd6af1d0a25 100644 (file)
@@ -64,7 +64,7 @@ static void signals_info (char *, int);
 
 static void handle_command (char *, int);
 
-static void sig_print_info (enum target_signal);
+static void sig_print_info (enum gdb_signal);
 
 static void sig_print_header (void);
 
@@ -90,11 +90,11 @@ static int prepare_to_proceed (int);
 
 static void print_exited_reason (int exitstatus);
 
-static void print_signal_exited_reason (enum target_signal siggnal);
+static void print_signal_exited_reason (enum gdb_signal siggnal);
 
 static void print_no_history_reason (void);
 
-static void print_signal_received_reason (enum target_signal siggnal);
+static void print_signal_received_reason (enum gdb_signal siggnal);
 
 static void print_end_stepping_range_reason (void);
 
@@ -343,7 +343,7 @@ static unsigned char *signal_pass;
 void
 update_signals_program_target (void)
 {
-  target_program_signals ((int) TARGET_SIGNAL_LAST, signal_program);
+  target_program_signals ((int) GDB_SIGNAL_LAST, signal_program);
 }
 
 /* Value to pass to target_resume() to cause all threads to resume.  */
@@ -622,7 +622,7 @@ proceed_after_vfork_done (struct thread_info *thread,
       && is_running (thread->ptid)
       && !is_executing (thread->ptid)
       && !thread->stop_requested
-      && thread->suspend.stop_signal == TARGET_SIGNAL_0)
+      && thread->suspend.stop_signal == GDB_SIGNAL_0)
     {
       if (debug_infrun)
        fprintf_unfiltered (gdb_stdlog,
@@ -631,7 +631,7 @@ proceed_after_vfork_done (struct thread_info *thread,
 
       switch_to_thread (thread->ptid);
       clear_proceed_status ();
-      proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
+      proceed ((CORE_ADDR) -1, GDB_SIGNAL_DEFAULT, 0);
     }
 
   return 0;
@@ -1185,19 +1185,6 @@ infrun_inferior_exit (struct inferior *inf)
   remove_displaced_stepping_state (inf->pid);
 }
 
-/* Enum strings for "set|show displaced-stepping".  */
-
-static const char can_use_displaced_stepping_auto[] = "auto";
-static const char can_use_displaced_stepping_on[] = "on";
-static const char can_use_displaced_stepping_off[] = "off";
-static const char *const can_use_displaced_stepping_enum[] =
-{
-  can_use_displaced_stepping_auto,
-  can_use_displaced_stepping_on,
-  can_use_displaced_stepping_off,
-  NULL,
-};
-
 /* If ON, and the architecture supports it, GDB will use displaced
    stepping to step over breakpoints.  If OFF, or if the architecture
    doesn't support it, GDB will instead use the traditional
@@ -1206,15 +1193,14 @@ static const char *const can_use_displaced_stepping_enum[] =
    which of all-stop or non-stop mode is active --- displaced stepping
    in non-stop mode; hold-and-step in all-stop mode.  */
 
-static const char *can_use_displaced_stepping =
-  can_use_displaced_stepping_auto;
+static enum auto_boolean can_use_displaced_stepping = AUTO_BOOLEAN_AUTO;
 
 static void
 show_can_use_displaced_stepping (struct ui_file *file, int from_tty,
                                 struct cmd_list_element *c,
                                 const char *value)
 {
-  if (can_use_displaced_stepping == can_use_displaced_stepping_auto)
+  if (can_use_displaced_stepping == AUTO_BOOLEAN_AUTO)
     fprintf_filtered (file,
                      _("Debugger's willingness to use displaced stepping "
                        "to step over breakpoints is %s (currently %s).\n"),
@@ -1231,9 +1217,8 @@ show_can_use_displaced_stepping (struct ui_file *file, int from_tty,
 static int
 use_displaced_stepping (struct gdbarch *gdbarch)
 {
-  return (((can_use_displaced_stepping == can_use_displaced_stepping_auto
-           && non_stop)
-          || can_use_displaced_stepping == can_use_displaced_stepping_on)
+  return (((can_use_displaced_stepping == AUTO_BOOLEAN_AUTO && non_stop)
+          || can_use_displaced_stepping == AUTO_BOOLEAN_TRUE)
          && gdbarch_displaced_step_copy_insn_p (gdbarch)
          && !RECORD_IS_USED);
 }
@@ -1433,7 +1418,7 @@ displaced_step_restore (struct displaced_step_inferior_state *displaced,
 }
 
 static void
-displaced_step_fixup (ptid_t event_ptid, enum target_signal signal)
+displaced_step_fixup (ptid_t event_ptid, enum gdb_signal signal)
 {
   struct cleanup *old_cleanups;
   struct displaced_step_inferior_state *displaced
@@ -1453,7 +1438,7 @@ displaced_step_fixup (ptid_t event_ptid, enum target_signal signal)
   displaced_step_restore (displaced, displaced->step_ptid);
 
   /* Did the instruction complete successfully?  */
-  if (signal == TARGET_SIGNAL_TRAP)
+  if (signal == GDB_SIGNAL_TRAP)
     {
       /* Fix up the resulting state.  */
       gdbarch_displaced_step_fixup (displaced->step_gdbarch,
@@ -1524,9 +1509,9 @@ displaced_step_fixup (ptid_t event_ptid, enum target_signal signal)
 
          if (gdbarch_displaced_step_hw_singlestep (gdbarch,
                                                    displaced->step_closure))
-           target_resume (ptid, 1, TARGET_SIGNAL_0);
+           target_resume (ptid, 1, GDB_SIGNAL_0);
          else
-           target_resume (ptid, 0, TARGET_SIGNAL_0);
+           target_resume (ptid, 0, GDB_SIGNAL_0);
 
          /* Done, we're stepping a thread.  */
          break;
@@ -1548,8 +1533,8 @@ displaced_step_fixup (ptid_t event_ptid, enum target_signal signal)
                                "displaced: breakpoint is gone: %s, step(%d)\n",
                                target_pid_to_str (tp->ptid), step);
 
-         target_resume (ptid, step, TARGET_SIGNAL_0);
-         tp->suspend.stop_signal = TARGET_SIGNAL_0;
+         target_resume (ptid, step, GDB_SIGNAL_0);
+         tp->suspend.stop_signal = GDB_SIGNAL_0;
 
          /* This request was discarded.  See if there's any other
             thread waiting for its turn.  */
@@ -1705,7 +1690,7 @@ user_visible_resume_ptid (int step)
    STEP nonzero if we should step (zero to continue instead).
    SIG is the signal to give the inferior (zero for none).  */
 void
-resume (int step, enum target_signal sig)
+resume (int step, enum gdb_signal sig)
 {
   int should_resume = 1;
   struct cleanup *old_cleanups = make_cleanup (resume_cleanups, 0);
@@ -1773,7 +1758,7 @@ a command like `return' or `jump' to continue execution."));
   if (use_displaced_stepping (gdbarch)
       && (tp->control.trap_expected
          || (step && gdbarch_software_single_step_p (gdbarch)))
-      && sig == TARGET_SIGNAL_0
+      && sig == GDB_SIGNAL_0
       && !current_inferior ()->waiting_for_vfork_done)
     {
       struct displaced_step_inferior_state *displaced;
@@ -1829,7 +1814,7 @@ a command like `return' or `jump' to continue execution."));
      once we arrive back at the step-resume breakpoint, actually step
      over the breakpoint we originally wanted to step over.  */
   if (singlestep_breakpoints_inserted_p
-      && tp->control.trap_expected && sig != TARGET_SIGNAL_0)
+      && tp->control.trap_expected && sig != GDB_SIGNAL_0)
     {
       /* If we have nested signals or a pending signal is delivered
         immediately after a handler returns, might might already have
@@ -1925,7 +1910,7 @@ a command like `return' or `jump' to continue execution."));
 
       /* Avoid confusing the next resume, if the next stop/resume
         happens to apply to another thread.  */
-      tp->suspend.stop_signal = TARGET_SIGNAL_0;
+      tp->suspend.stop_signal = GDB_SIGNAL_0;
 
       /* Advise target which signals may be handled silently.  If we have
         removed breakpoints because we are stepping over one (which can
@@ -1937,7 +1922,7 @@ a command like `return' or `jump' to continue execution."));
          && !use_displaced_stepping (gdbarch))
        target_pass_signals (0, NULL);
       else
-       target_pass_signals ((int) TARGET_SIGNAL_LAST, signal_pass);
+       target_pass_signals ((int) GDB_SIGNAL_LAST, signal_pass);
 
       target_resume (resume_ptid, step, sig);
     }
@@ -2043,10 +2028,10 @@ prepare_to_proceed (int step)
 
   /* Make sure we were stopped at a breakpoint.  */
   if (wait_status.kind != TARGET_WAITKIND_STOPPED
-      || (wait_status.value.sig != TARGET_SIGNAL_TRAP
-         && wait_status.value.sig != TARGET_SIGNAL_ILL
-         && wait_status.value.sig != TARGET_SIGNAL_SEGV
-         && wait_status.value.sig != TARGET_SIGNAL_EMT))
+      || (wait_status.value.sig != GDB_SIGNAL_TRAP
+         && wait_status.value.sig != GDB_SIGNAL_ILL
+         && wait_status.value.sig != GDB_SIGNAL_SEGV
+         && wait_status.value.sig != GDB_SIGNAL_EMT))
     {
       return 0;
     }
@@ -2110,7 +2095,7 @@ prepare_to_proceed (int step)
    You should call clear_proceed_status before calling proceed.  */
 
 void
-proceed (CORE_ADDR addr, enum target_signal siggnal, int step)
+proceed (CORE_ADDR addr, enum gdb_signal siggnal, int step)
 {
   struct regcache *regcache;
   struct gdbarch *gdbarch;
@@ -2238,17 +2223,17 @@ proceed (CORE_ADDR addr, enum target_signal siggnal, int step)
          if (last_thread)
            {
              tp->suspend.stop_signal = last_thread->suspend.stop_signal;
-             last_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+             last_thread->suspend.stop_signal = GDB_SIGNAL_0;
            }
        }
     }
 
-  if (siggnal != TARGET_SIGNAL_DEFAULT)
+  if (siggnal != GDB_SIGNAL_DEFAULT)
     tp->suspend.stop_signal = siggnal;
   /* If this signal should not be seen by program,
      give it zero.  Used for debugging signals.  */
   else if (!signal_program[tp->suspend.stop_signal])
-    tp->suspend.stop_signal = TARGET_SIGNAL_0;
+    tp->suspend.stop_signal = GDB_SIGNAL_0;
 
   annotate_starting ();
 
@@ -2393,7 +2378,6 @@ struct execution_control_state
   CORE_ADDR stop_func_start;
   CORE_ADDR stop_func_end;
   const char *stop_func_name;
-  int new_thread_event;
   int wait_some_more;
 };
 
@@ -2438,15 +2422,13 @@ infrun_thread_stop_requested_callback (struct thread_info *info, void *arg)
 
       old_chain = make_cleanup_restore_current_thread ();
 
-      switch_to_thread (info->ptid);
-
       /* Go through handle_inferior_event/normal_stop, so we always
         have consistent output as if the stop event had been
         reported.  */
       ecs->ptid = info->ptid;
       ecs->event_thread = find_thread_ptid (info->ptid);
       ecs->ws.kind = TARGET_WAITKIND_STOPPED;
-      ecs->ws.value.sig = TARGET_SIGNAL_0;
+      ecs->ws.value.sig = GDB_SIGNAL_0;
 
       handle_inferior_event (ecs);
 
@@ -2656,14 +2638,6 @@ prepare_for_detach (void)
       old_chain_2 = make_cleanup (finish_thread_state_cleanup,
                                  &minus_one_ptid);
 
-      /* In non-stop mode, each thread is handled individually.
-        Switch early, so the global state is set correctly for this
-        thread.  */
-      if (non_stop
-         && ecs->ws.kind != TARGET_WAITKIND_EXITED
-         && ecs->ws.kind != TARGET_WAITKIND_SIGNALLED)
-       context_switch (ecs->ptid);
-
       /* Now figure out what to do with the result of the result.  */
       handle_inferior_event (ecs);
 
@@ -2694,8 +2668,6 @@ void
 wait_for_inferior (void)
 {
   struct cleanup *old_cleanups;
-  struct execution_control_state ecss;
-  struct execution_control_state *ecs;
 
   if (debug_infrun)
     fprintf_unfiltered
@@ -2704,13 +2676,14 @@ wait_for_inferior (void)
   old_cleanups =
     make_cleanup (delete_step_thread_step_resume_breakpoint_cleanup, NULL);
 
-  ecs = &ecss;
-  memset (ecs, 0, sizeof (*ecs));
-
   while (1)
     {
+      struct execution_control_state ecss;
+      struct execution_control_state *ecs = &ecss;
       struct cleanup *old_chain;
 
+      memset (ecs, 0, sizeof (*ecs));
+
       overlay_cache_invalid = 1;
 
       if (deprecated_target_wait_hook)
@@ -2791,16 +2764,6 @@ fetch_inferior_event (void *client_data)
   if (debug_infrun)
     print_target_wait_results (waiton_ptid, ecs->ptid, &ecs->ws);
 
-  if (non_stop
-      && ecs->ws.kind != TARGET_WAITKIND_IGNORE
-      && ecs->ws.kind != TARGET_WAITKIND_NO_RESUMED
-      && ecs->ws.kind != TARGET_WAITKIND_EXITED
-      && ecs->ws.kind != TARGET_WAITKIND_SIGNALLED)
-    /* In non-stop mode, each thread is handled individually.  Switch
-       early, so the global state is set correctly for this
-       thread.  */
-    context_switch (ecs->ptid);
-
   /* If an error happens while handling the event, propagate GDB's
      knowledge of the executing state to the frontend/user running
      state.  */
@@ -2948,7 +2911,7 @@ adjust_pc_after_break (struct execution_control_state *ecs)
   if (ecs->ws.kind != TARGET_WAITKIND_STOPPED)
     return;
 
-  if (ecs->ws.value.sig != TARGET_SIGNAL_TRAP)
+  if (ecs->ws.value.sig != GDB_SIGNAL_TRAP)
     return;
 
   /* In reverse execution, when a breakpoint is hit, the instruction
@@ -3112,13 +3075,13 @@ handle_syscall_event (struct execution_control_state *ecs)
       if (!ecs->random_signal)
        {
          /* Catchpoint hit.  */
-         ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
+         ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_TRAP;
          return 0;
        }
     }
 
   /* If no catchpoint triggered for this, then keep going.  */
-  ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+  ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
   keep_going (ecs);
   return 1;
 }
@@ -3230,17 +3193,15 @@ handle_inferior_event (struct execution_control_state *ecs)
       return;
     }
 
-  /* If it's a new process, add it to the thread database.  */
-
-  ecs->new_thread_event = (!ptid_equal (ecs->ptid, inferior_ptid)
-                          && !ptid_equal (ecs->ptid, minus_one_ptid)
-                          && !in_thread_list (ecs->ptid));
-
   if (ecs->ws.kind != TARGET_WAITKIND_EXITED
-      && ecs->ws.kind != TARGET_WAITKIND_SIGNALLED && ecs->new_thread_event)
-    add_thread (ecs->ptid);
-
-  ecs->event_thread = find_thread_ptid (ecs->ptid);
+      && ecs->ws.kind != TARGET_WAITKIND_SIGNALLED
+      && !ptid_equal (ecs->ptid, minus_one_ptid))
+    {
+      ecs->event_thread = find_thread_ptid (ecs->ptid);
+      /* If it's a new thread, add it to the thread database.  */
+      if (ecs->event_thread == NULL)
+       ecs->event_thread = add_thread (ecs->ptid);
+    }
 
   /* Dependent on valid ECS->EVENT_THREAD.  */
   adjust_pc_after_break (ecs);
@@ -3261,9 +3222,9 @@ handle_inferior_event (struct execution_control_state *ecs)
      for architectures like SPARC that place call dummies on the
      stack.  */
   if (ecs->ws.kind == TARGET_WAITKIND_STOPPED
-      && (ecs->ws.value.sig == TARGET_SIGNAL_ILL
-         || ecs->ws.value.sig == TARGET_SIGNAL_SEGV
-         || ecs->ws.value.sig == TARGET_SIGNAL_EMT))
+      && (ecs->ws.value.sig == GDB_SIGNAL_ILL
+         || ecs->ws.value.sig == GDB_SIGNAL_SEGV
+         || ecs->ws.value.sig == GDB_SIGNAL_EMT))
     {
       struct regcache *regcache = get_thread_regcache (ecs->ptid);
 
@@ -3273,7 +3234,7 @@ handle_inferior_event (struct execution_control_state *ecs)
          if (debug_infrun)
            fprintf_unfiltered (gdb_stdlog,
                                "infrun: Treating signal as SIGTRAP\n");
-         ecs->ws.value.sig = TARGET_SIGNAL_TRAP;
+         ecs->ws.value.sig = GDB_SIGNAL_TRAP;
        }
     }
 
@@ -3358,7 +3319,7 @@ handle_inferior_event (struct execution_control_state *ecs)
          if (!ecs->random_signal)
            {
              /* A catchpoint triggered.  */
-             ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
+             ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_TRAP;
              goto process_event_stop_test;
            }
 
@@ -3366,7 +3327,7 @@ handle_inferior_event (struct execution_control_state *ecs)
             gdb of events.  This allows the user to get control
             and place breakpoints in initializer routines for
             dynamically loaded objects (among other things).  */
-         ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+         ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
          if (stop_on_solib_events)
            {
              /* Make sure we print "Stopped due to solib-event" in
@@ -3384,12 +3345,15 @@ handle_inferior_event (struct execution_control_state *ecs)
         we're attaching or setting up a remote connection.  */
       if (stop_soon == STOP_QUIETLY || stop_soon == NO_STOP_QUIETLY)
        {
+         if (!ptid_equal (ecs->ptid, inferior_ptid))
+           context_switch (ecs->ptid);
+
          /* Loading of shared libraries might have changed breakpoint
             addresses.  Make sure new breakpoints are inserted.  */
          if (stop_soon == NO_STOP_QUIETLY
              && !breakpoints_always_inserted_mode ())
            insert_breakpoints ();
-         resume (0, TARGET_SIGNAL_0);
+         resume (0, GDB_SIGNAL_0);
          prepare_to_wait (ecs);
          return;
        }
@@ -3399,7 +3363,10 @@ handle_inferior_event (struct execution_control_state *ecs)
     case TARGET_WAITKIND_SPURIOUS:
       if (debug_infrun)
         fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SPURIOUS\n");
-      resume (0, TARGET_SIGNAL_0);
+      if (!ptid_equal (ecs->ptid, inferior_ptid)
+         && !ptid_equal (ecs->ptid, minus_one_ptid))
+       context_switch (ecs->ptid);
+      resume (0, GDB_SIGNAL_0);
       prepare_to_wait (ecs);
       return;
 
@@ -3481,7 +3448,7 @@ handle_inferior_event (struct execution_control_state *ecs)
               has been done.  Perform cleanup for parent process here.  Note
               that this operation also cleans up the child process for vfork,
               because their pages are shared.  */
-           displaced_step_fixup (ecs->ptid, TARGET_SIGNAL_TRAP);
+           displaced_step_fixup (ecs->ptid, GDB_SIGNAL_TRAP);
 
            if (ecs->ws.kind == TARGET_WAITKIND_FORKED)
              {
@@ -3515,10 +3482,7 @@ handle_inferior_event (struct execution_control_state *ecs)
       }
 
       if (!ptid_equal (ecs->ptid, inferior_ptid))
-       {
-         context_switch (ecs->ptid);
-         reinit_frame_cache ();
-       }
+       context_switch (ecs->ptid);
 
       /* Immediately detach breakpoints from the child before there's
         any chance of letting the user delete breakpoints from the
@@ -3575,7 +3539,7 @@ handle_inferior_event (struct execution_control_state *ecs)
          int follow_child
            = (follow_fork_mode_string == follow_fork_mode_child);
 
-         ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+         ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
 
          should_resume = follow_fork ();
 
@@ -3609,7 +3573,7 @@ handle_inferior_event (struct execution_control_state *ecs)
            stop_stepping (ecs);
          return;
        }
-      ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
+      ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_TRAP;
       goto process_event_stop_test;
 
     case TARGET_WAITKIND_VFORK_DONE:
@@ -3635,10 +3599,7 @@ handle_inferior_event (struct execution_control_state *ecs)
         fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_EXECD\n");
 
       if (!ptid_equal (ecs->ptid, inferior_ptid))
-       {
-         context_switch (ecs->ptid);
-         reinit_frame_cache ();
-       }
+       context_switch (ecs->ptid);
 
       singlestep_breakpoints_inserted_p = 0;
       cancel_single_step_breakpoints ();
@@ -3667,11 +3628,11 @@ handle_inferior_event (struct execution_control_state *ecs)
       /* If no catchpoint triggered for this, then keep going.  */
       if (ecs->random_signal)
        {
-         ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+         ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
          keep_going (ecs);
          return;
        }
-      ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
+      ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_TRAP;
       goto process_event_stop_test;
 
       /* Be careful not to try to gather much state about a thread
@@ -3714,30 +3675,6 @@ handle_inferior_event (struct execution_control_state *ecs)
       return;
     }
 
-  if (ecs->new_thread_event)
-    {
-      if (non_stop)
-       /* Non-stop assumes that the target handles adding new threads
-          to the thread list.  */
-       internal_error (__FILE__, __LINE__,
-                       "targets should add new threads to the thread "
-                       "list themselves in non-stop mode.");
-
-      /* We may want to consider not doing a resume here in order to
-        give the user a chance to play with the new thread.  It might
-        be good to make that a user-settable option.  */
-
-      /* At this point, all threads are stopped (happens automatically
-        in either the OS or the native code).  Therefore we need to
-        continue all threads in order to make progress.  */
-
-      if (!ptid_equal (ecs->ptid, inferior_ptid))
-       context_switch (ecs->ptid);
-      target_resume (RESUME_ALL, 0, TARGET_SIGNAL_0);
-      prepare_to_wait (ecs);
-      return;
-    }
-
   if (ecs->ws.kind == TARGET_WAITKIND_STOPPED)
     {
       /* Do we need to clean up the state of a thread that has
@@ -3751,8 +3688,8 @@ handle_inferior_event (struct execution_control_state *ecs)
         SIG0 (generic unsignaled stop).  */
 
       if (ecs->event_thread->stop_requested
-         && ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
-       ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+         && ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
+       ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
     }
 
   stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
@@ -3796,13 +3733,15 @@ handle_inferior_event (struct execution_control_state *ecs)
       /* We've either finished single-stepping past the single-step
          breakpoint, or stopped for some other reason.  It would be nice if
          we could tell, but we can't reliably.  */
-      if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
+      if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
        {
          if (debug_infrun)
            fprintf_unfiltered (gdb_stdlog,
                                "infrun: stepping_past_"
                                "singlestep_breakpoint\n");
          /* Pull the single step breakpoints out of the target.  */
+         if (!ptid_equal (ecs->ptid, inferior_ptid))
+           context_switch (ecs->ptid);
          remove_single_step_breakpoints ();
          singlestep_breakpoints_inserted_p = 0;
 
@@ -3813,7 +3752,7 @@ handle_inferior_event (struct execution_control_state *ecs)
          if (deprecated_context_hook)
            deprecated_context_hook (pid_to_thread_id (ecs->ptid));
 
-         resume (1, TARGET_SIGNAL_0);
+         resume (1, GDB_SIGNAL_0);
          prepare_to_wait (ecs);
          return;
        }
@@ -3826,7 +3765,7 @@ handle_inferior_event (struct execution_control_state *ecs)
 
       /* If we stopped for some other reason than single-stepping, ignore
         the fact that we were supposed to switch back.  */
-      if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
+      if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
        {
          if (debug_infrun)
            fprintf_unfiltered (gdb_stdlog,
@@ -3835,20 +3774,20 @@ handle_inferior_event (struct execution_control_state *ecs)
          /* Pull the single step breakpoints out of the target.  */
          if (singlestep_breakpoints_inserted_p)
            {
+             if (!ptid_equal (ecs->ptid, inferior_ptid))
+               context_switch (ecs->ptid);
              remove_single_step_breakpoints ();
              singlestep_breakpoints_inserted_p = 0;
            }
 
          ecs->event_thread->control.trap_expected = 0;
 
-         /* Note: We do not call context_switch at this point, as the
-            context is already set up for stepping the original thread.  */
-         switch_to_thread (deferred_step_ptid);
+         context_switch (deferred_step_ptid);
          deferred_step_ptid = null_ptid;
          /* Suppress spurious "Switching to ..." message.  */
          previous_inferior_ptid = inferior_ptid;
 
-         resume (1, TARGET_SIGNAL_0);
+         resume (1, GDB_SIGNAL_0);
          prepare_to_wait (ecs);
          return;
        }
@@ -3860,7 +3799,7 @@ handle_inferior_event (struct execution_control_state *ecs)
      another thread.  If so, then step that thread past the breakpoint,
      and continue it.  */
 
-  if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
+  if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
     {
       int thread_hop_needed = 0;
       struct address_space *aspace = 
@@ -3916,7 +3855,7 @@ handle_inferior_event (struct execution_control_state *ecs)
 
             if (new_singlestep_pc != singlestep_pc)
               {
-                enum target_signal stop_signal;
+                enum gdb_signal stop_signal;
 
                 if (debug_infrun)
                   fprintf_unfiltered (gdb_stdlog, "infrun: unexpected thread,"
@@ -3927,7 +3866,7 @@ handle_inferior_event (struct execution_control_state *ecs)
                    the context we want to use.  Just fudge our
                    state and continue.  */
                  stop_signal = ecs->event_thread->suspend.stop_signal;
-                 ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+                 ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
                  ecs->ptid = singlestep_ptid;
                  ecs->event_thread = find_thread_ptid (ecs->ptid);
                  ecs->event_thread->suspend.stop_signal = stop_signal;
@@ -4073,7 +4012,7 @@ handle_inferior_event (struct execution_control_state *ecs)
        }
        /* Single step */
       hw_step = maybe_software_singlestep (gdbarch, stop_pc);
-      target_resume (ecs->ptid, hw_step, TARGET_SIGNAL_0);
+      target_resume (ecs->ptid, hw_step, GDB_SIGNAL_0);
       waiton_ptid = ecs->ptid;
       if (target_have_steppable_watchpoint)
        infwait_state = infwait_step_watch_state;
@@ -4115,15 +4054,22 @@ handle_inferior_event (struct execution_control_state *ecs)
         skip_inline_frames call would break things.  Fortunately
         that's an extremely unlikely scenario.  */
       if (!pc_at_non_inline_function (aspace, stop_pc, &ecs->ws)
-          && !(ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
-               && ecs->event_thread->control.trap_expected
-               && pc_at_non_inline_function (aspace,
-                                             ecs->event_thread->prev_pc,
+         && !(ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
+              && ecs->event_thread->control.trap_expected
+              && pc_at_non_inline_function (aspace,
+                                            ecs->event_thread->prev_pc,
                                             &ecs->ws)))
-       skip_inline_frames (ecs->ptid);
+       {
+         skip_inline_frames (ecs->ptid);
+
+         /* Re-fetch current thread's frame in case that invalidated
+            the frame cache.  */
+         frame = get_current_frame ();
+         gdbarch = get_frame_arch (frame);
+       }
     }
 
-  if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+  if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
       && ecs->event_thread->control.trap_expected
       && gdbarch_single_step_through_delay_p (gdbarch)
       && currently_stepping (ecs->event_thread))
@@ -4167,11 +4113,11 @@ handle_inferior_event (struct execution_control_state *ecs)
      3) set ecs->random_signal to 1, and the decision between 1 and 2
      will be made according to the signal handling tables.  */
 
-  if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+  if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
       || stop_soon == STOP_QUIETLY || stop_soon == STOP_QUIETLY_NO_SIGSTOP
       || stop_soon == STOP_QUIETLY_REMOTE)
     {
-      if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+      if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
          && stop_after_trap)
        {
           if (debug_infrun)
@@ -4205,19 +4151,19 @@ handle_inferior_event (struct execution_control_state *ecs)
         signal, so this is no exception.
 
         Also consider that the attach is complete when we see a
-        TARGET_SIGNAL_0.  In non-stop mode, GDB will explicitly tell
+        GDB_SIGNAL_0.  In non-stop mode, GDB will explicitly tell
         the target to stop all threads of the inferior, in case the
         low level attach operation doesn't stop them implicitly.  If
         they weren't stopped implicitly, then the stub will report a
-        TARGET_SIGNAL_0, meaning: stopped for no particular reason
+        GDB_SIGNAL_0, meaning: stopped for no particular reason
         other than GDB's request.  */
       if (stop_soon == STOP_QUIETLY_NO_SIGSTOP
-         && (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_STOP
-             || ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
-             || ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_0))
+         && (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_STOP
+             || ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
+             || ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_0))
        {
          stop_stepping (ecs);
-         ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+         ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
          return;
        }
 
@@ -4240,7 +4186,7 @@ handle_inferior_event (struct execution_control_state *ecs)
         set.  */
 
       if (debug_infrun
-         && ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+         && ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
          && !bpstat_explains_signal (ecs->event_thread->control.stop_bpstat)
          && stopped_by_watchpoint)
        fprintf_unfiltered (gdb_stdlog,
@@ -4267,7 +4213,7 @@ handle_inferior_event (struct execution_control_state *ecs)
          be necessary for call dummies on a non-executable stack on
          SPARC.  */
 
-      if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
+      if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP)
        ecs->random_signal
          = !(bpstat_explains_signal (ecs->event_thread->control.stop_bpstat)
              || stopped_by_watchpoint
@@ -4280,7 +4226,7 @@ handle_inferior_event (struct execution_control_state *ecs)
          ecs->random_signal = !bpstat_explains_signal
                                     (ecs->event_thread->control.stop_bpstat);
          if (!ecs->random_signal)
-           ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
+           ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_TRAP;
        }
     }
 
@@ -4338,7 +4284,7 @@ process_event_stop_test:
 
       /* Clear the signal if it should not be passed.  */
       if (signal_program[ecs->event_thread->suspend.stop_signal] == 0)
-       ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+       ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
 
       if (ecs->event_thread->prev_pc == stop_pc
          && ecs->event_thread->control.trap_expected
@@ -4368,7 +4314,7 @@ process_event_stop_test:
        }
 
       if (ecs->event_thread->control.step_range_end != 0
-         && ecs->event_thread->suspend.stop_signal != TARGET_SIGNAL_0
+         && ecs->event_thread->suspend.stop_signal != GDB_SIGNAL_0
          && (ecs->event_thread->control.step_range_start <= stop_pc
              && stop_pc < ecs->event_thread->control.step_range_end)
          && frame_id_eq (get_stack_frame_id (frame),
@@ -4402,107 +4348,116 @@ process_event_stop_test:
         (leaving the inferior at the step-resume-breakpoint without
         actually executing it).  Either way continue until the
         breakpoint is really hit.  */
-      keep_going (ecs);
-      return;
     }
+  else
+    {
+      /* Handle cases caused by hitting a breakpoint.  */
 
-  /* Handle cases caused by hitting a breakpoint.  */
-  {
-    CORE_ADDR jmp_buf_pc;
-    struct bpstat_what what;
-
-    what = bpstat_what (ecs->event_thread->control.stop_bpstat);
-
-    if (what.call_dummy)
-      {
-       stop_stack_dummy = what.call_dummy;
-      }
+      CORE_ADDR jmp_buf_pc;
+      struct bpstat_what what;
 
-    /* If we hit an internal event that triggers symbol changes, the
-       current frame will be invalidated within bpstat_what (e.g., if
-       we hit an internal solib event).  Re-fetch it.  */
-    frame = get_current_frame ();
-    gdbarch = get_frame_arch (frame);
+      what = bpstat_what (ecs->event_thread->control.stop_bpstat);
 
-    switch (what.main_action)
-      {
-      case BPSTAT_WHAT_SET_LONGJMP_RESUME:
-       /* If we hit the breakpoint at longjmp while stepping, we
-          install a momentary breakpoint at the target of the
-          jmp_buf.  */
+      if (what.call_dummy)
+       {
+         stop_stack_dummy = what.call_dummy;
+       }
 
-       if (debug_infrun)
-         fprintf_unfiltered (gdb_stdlog,
-                             "infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME\n");
+      /* If we hit an internal event that triggers symbol changes, the
+        current frame will be invalidated within bpstat_what (e.g.,
+        if we hit an internal solib event).  Re-fetch it.  */
+      frame = get_current_frame ();
+      gdbarch = get_frame_arch (frame);
 
-       ecs->event_thread->stepping_over_breakpoint = 1;
+      switch (what.main_action)
+       {
+       case BPSTAT_WHAT_SET_LONGJMP_RESUME:
+         /* If we hit the breakpoint at longjmp while stepping, we
+            install a momentary breakpoint at the target of the
+            jmp_buf.  */
 
-       if (what.is_longjmp)
-         {
-           struct value *arg_value;
-
-           /* If we set the longjmp breakpoint via a SystemTap probe,
-              then use it to extract the arguments.  The destination
-              PC is the third argument to the probe.  */
-           arg_value = probe_safe_evaluate_at_pc (frame, 2);
-           if (arg_value)
-             jmp_buf_pc = value_as_address (arg_value);
-           else if (!gdbarch_get_longjmp_target_p (gdbarch)
-                    || !gdbarch_get_longjmp_target (gdbarch,
-                                                    frame, &jmp_buf_pc))
-             {
-               if (debug_infrun)
-                 fprintf_unfiltered (gdb_stdlog,
-                                     "infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME "
-                                     "(!gdbarch_get_longjmp_target)\n");
-               keep_going (ecs);
-               return;
-             }
+         if (debug_infrun)
+           fprintf_unfiltered (gdb_stdlog,
+                               "infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME\n");
 
-           /* We're going to replace the current step-resume breakpoint
-              with a longjmp-resume breakpoint.  */
-           delete_step_resume_breakpoint (ecs->event_thread);
+         ecs->event_thread->stepping_over_breakpoint = 1;
 
-           /* Insert a breakpoint at resume address.  */
-           insert_longjmp_resume_breakpoint (gdbarch, jmp_buf_pc);
-         }
-       else
-         check_exception_resume (ecs, frame);
-       keep_going (ecs);
-       return;
+         if (what.is_longjmp)
+           {
+             struct value *arg_value;
+
+             /* If we set the longjmp breakpoint via a SystemTap
+                probe, then use it to extract the arguments.  The
+                destination PC is the third argument to the
+                probe.  */
+             arg_value = probe_safe_evaluate_at_pc (frame, 2);
+             if (arg_value)
+               jmp_buf_pc = value_as_address (arg_value);
+             else if (!gdbarch_get_longjmp_target_p (gdbarch)
+                      || !gdbarch_get_longjmp_target (gdbarch,
+                                                      frame, &jmp_buf_pc))
+               {
+                 if (debug_infrun)
+                   fprintf_unfiltered (gdb_stdlog,
+                                       "infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME "
+                                       "(!gdbarch_get_longjmp_target)\n");
+                 keep_going (ecs);
+                 return;
+               }
 
-      case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME:
-        if (debug_infrun)
-         fprintf_unfiltered (gdb_stdlog,
-                             "infrun: BPSTAT_WHAT_CLEAR_LONGJMP_RESUME\n");
+             /* Insert a breakpoint at resume address.  */
+             insert_longjmp_resume_breakpoint (gdbarch, jmp_buf_pc);
+           }
+         else
+           check_exception_resume (ecs, frame);
+         keep_going (ecs);
+         return;
 
-       if (what.is_longjmp)
-         {
-           gdb_assert (ecs->event_thread->control.step_resume_breakpoint
-                       != NULL);
-           delete_step_resume_breakpoint (ecs->event_thread);
-         }
-       else
+       case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME:
          {
+           struct frame_info *init_frame;
+
            /* There are several cases to consider.
 
               1. The initiating frame no longer exists.  In this case
-              we must stop, because the exception has gone too far.
+              we must stop, because the exception or longjmp has gone
+              too far.
 
               2. The initiating frame exists, and is the same as the
-              current frame.  We stop, because the exception has been
-              caught.
+              current frame.  We stop, because the exception or
+              longjmp has been caught.
 
               3. The initiating frame exists and is different from
-              the current frame.  This means the exception has been
-              caught beneath the initiating frame, so keep going.  */
-           struct frame_info *init_frame
-             = frame_find_by_id (ecs->event_thread->initiating_frame);
+              the current frame.  This means the exception or longjmp
+              has been caught beneath the initiating frame, so keep
+              going.
+
+              4. longjmp breakpoint has been placed just to protect
+              against stale dummy frames and user is not interested
+              in stopping around longjmps.  */
+
+           if (debug_infrun)
+             fprintf_unfiltered (gdb_stdlog,
+                                 "infrun: BPSTAT_WHAT_CLEAR_LONGJMP_RESUME\n");
 
            gdb_assert (ecs->event_thread->control.exception_resume_breakpoint
                        != NULL);
            delete_exception_resume_breakpoint (ecs->event_thread);
 
+           if (what.is_longjmp)
+             {
+               check_longjmp_breakpoint_for_call_dummy (ecs->event_thread->num);
+
+               if (!frame_id_p (ecs->event_thread->initiating_frame))
+                 {
+                   /* Case 4.  */
+                   keep_going (ecs);
+                   return;
+                 }
+             }
+
+           init_frame = frame_find_by_id (ecs->event_thread->initiating_frame);
+
            if (init_frame)
              {
                struct frame_id current_id
@@ -4523,97 +4478,97 @@ process_event_stop_test:
            /* For Cases 1 and 2, remove the step-resume breakpoint,
               if it exists.  */
            delete_step_resume_breakpoint (ecs->event_thread);
+
+           ecs->event_thread->control.stop_step = 1;
+           print_end_stepping_range_reason ();
+           stop_stepping (ecs);
          }
+         return;
 
-       ecs->event_thread->control.stop_step = 1;
-       print_end_stepping_range_reason ();
-       stop_stepping (ecs);
-       return;
-
-      case BPSTAT_WHAT_SINGLE:
-        if (debug_infrun)
-         fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_SINGLE\n");
-       ecs->event_thread->stepping_over_breakpoint = 1;
-       /* Still need to check other stuff, at least the case
-          where we are stepping and step out of the right range.  */
-       break;
+       case BPSTAT_WHAT_SINGLE:
+         if (debug_infrun)
+           fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_SINGLE\n");
+         ecs->event_thread->stepping_over_breakpoint = 1;
+         /* Still need to check other stuff, at least the case where
+            we are stepping and step out of the right range.  */
+         break;
 
-      case BPSTAT_WHAT_STEP_RESUME:
-        if (debug_infrun)
-         fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STEP_RESUME\n");
+       case BPSTAT_WHAT_STEP_RESUME:
+         if (debug_infrun)
+           fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STEP_RESUME\n");
 
-       delete_step_resume_breakpoint (ecs->event_thread);
-       if (ecs->event_thread->control.proceed_to_finish
-           && execution_direction == EXEC_REVERSE)
-         {
-           struct thread_info *tp = ecs->event_thread;
-
-           /* We are finishing a function in reverse, and just hit
-              the step-resume breakpoint at the start address of the
-              function, and we're almost there -- just need to back
-              up by one more single-step, which should take us back
-              to the function call.  */
-           tp->control.step_range_start = tp->control.step_range_end = 1;
-           keep_going (ecs);
-           return;
-         }
-       fill_in_stop_func (gdbarch, ecs);
-       if (stop_pc == ecs->stop_func_start
-           && execution_direction == EXEC_REVERSE)
-         {
-           /* We are stepping over a function call in reverse, and
-              just hit the step-resume breakpoint at the start
-              address of the function.  Go back to single-stepping,
-              which should take us back to the function call.  */
-           ecs->event_thread->stepping_over_breakpoint = 1;
-           keep_going (ecs);
-           return;
-         }
-       break;
+         delete_step_resume_breakpoint (ecs->event_thread);
+         if (ecs->event_thread->control.proceed_to_finish
+             && execution_direction == EXEC_REVERSE)
+           {
+             struct thread_info *tp = ecs->event_thread;
+
+             /* We are finishing a function in reverse, and just hit
+                the step-resume breakpoint at the start address of
+                the function, and we're almost there -- just need to
+                back up by one more single-step, which should take us
+                back to the function call.  */
+             tp->control.step_range_start = tp->control.step_range_end = 1;
+             keep_going (ecs);
+             return;
+           }
+         fill_in_stop_func (gdbarch, ecs);
+         if (stop_pc == ecs->stop_func_start
+             && execution_direction == EXEC_REVERSE)
+           {
+             /* We are stepping over a function call in reverse, and
+                just hit the step-resume breakpoint at the start
+                address of the function.  Go back to single-stepping,
+                which should take us back to the function call.  */
+             ecs->event_thread->stepping_over_breakpoint = 1;
+             keep_going (ecs);
+             return;
+           }
+         break;
 
-      case BPSTAT_WHAT_STOP_NOISY:
-        if (debug_infrun)
-         fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_NOISY\n");
-       stop_print_frame = 1;
+       case BPSTAT_WHAT_STOP_NOISY:
+         if (debug_infrun)
+           fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_NOISY\n");
+         stop_print_frame = 1;
 
-       /* We are about to nuke the step_resume_breakpointt via the
-          cleanup chain, so no need to worry about it here.  */
+         /* We are about to nuke the step_resume_breakpointt via the
+            cleanup chain, so no need to worry about it here.  */
 
-       stop_stepping (ecs);
-       return;
+         stop_stepping (ecs);
+         return;
 
-      case BPSTAT_WHAT_STOP_SILENT:
-        if (debug_infrun)
-         fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_SILENT\n");
-       stop_print_frame = 0;
+       case BPSTAT_WHAT_STOP_SILENT:
+         if (debug_infrun)
+           fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_SILENT\n");
+         stop_print_frame = 0;
 
-       /* We are about to nuke the step_resume_breakpoin via the
-          cleanup chain, so no need to worry about it here.  */
+         /* We are about to nuke the step_resume_breakpoin via the
+            cleanup chain, so no need to worry about it here.  */
 
-       stop_stepping (ecs);
-       return;
+         stop_stepping (ecs);
+         return;
 
-      case BPSTAT_WHAT_HP_STEP_RESUME:
-        if (debug_infrun)
-         fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_HP_STEP_RESUME\n");
+       case BPSTAT_WHAT_HP_STEP_RESUME:
+         if (debug_infrun)
+           fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_HP_STEP_RESUME\n");
 
-       delete_step_resume_breakpoint (ecs->event_thread);
-       if (ecs->event_thread->step_after_step_resume_breakpoint)
-         {
-           /* Back when the step-resume breakpoint was inserted, we
-              were trying to single-step off a breakpoint.  Go back
-              to doing that.  */
-           ecs->event_thread->step_after_step_resume_breakpoint = 0;
-           ecs->event_thread->stepping_over_breakpoint = 1;
-           keep_going (ecs);
-           return;
-         }
-       break;
+         delete_step_resume_breakpoint (ecs->event_thread);
+         if (ecs->event_thread->step_after_step_resume_breakpoint)
+           {
+             /* Back when the step-resume breakpoint was inserted, we
+                were trying to single-step off a breakpoint.  Go back
+                to doing that.  */
+             ecs->event_thread->step_after_step_resume_breakpoint = 0;
+             ecs->event_thread->stepping_over_breakpoint = 1;
+             keep_going (ecs);
+             return;
+           }
+         break;
 
-      case BPSTAT_WHAT_KEEP_CHECKING:
-       break;
-      }
-  }
+       case BPSTAT_WHAT_KEEP_CHECKING:
+         break;
+       }
+    }
 
   /* We come here if we hit a breakpoint but should not
      stop for it.  Possibly we also were stepping
@@ -4635,7 +4590,7 @@ process_event_stop_test:
             breakpoint, and we simply need to step over that breakpoint
             to get it going again, do that first.  */
          if ((ecs->event_thread->control.trap_expected
-              && ecs->event_thread->suspend.stop_signal != TARGET_SIGNAL_TRAP)
+              && ecs->event_thread->suspend.stop_signal != GDB_SIGNAL_TRAP)
              || ecs->event_thread->stepping_over_breakpoint)
            {
              keep_going (ecs);
@@ -5497,17 +5452,17 @@ insert_step_resume_breakpoint_at_caller (struct frame_info *next_frame)
 static void
 insert_longjmp_resume_breakpoint (struct gdbarch *gdbarch, CORE_ADDR pc)
 {
-  /* There should never be more than one step-resume or longjmp-resume
-     breakpoint per thread, so we should never be setting a new
+  /* There should never be more than one longjmp-resume breakpoint per
+     thread, so we should never be setting a new
      longjmp_resume_breakpoint when one is already active.  */
-  gdb_assert (inferior_thread ()->control.step_resume_breakpoint == NULL);
+  gdb_assert (inferior_thread ()->control.exception_resume_breakpoint == NULL);
 
   if (debug_infrun)
     fprintf_unfiltered (gdb_stdlog,
                        "infrun: inserting longjmp-resume breakpoint at %s\n",
                        paddress (gdbarch, pc));
 
-  inferior_thread ()->control.step_resume_breakpoint =
+  inferior_thread ()->control.exception_resume_breakpoint =
     set_momentary_breakpoint_at_pc (gdbarch, pc, bp_longjmp_resume);
 }
 
@@ -5685,7 +5640,7 @@ keep_going (struct execution_control_state *ecs)
      inferior and not return to debugger.  */
 
   if (ecs->event_thread->control.trap_expected
-      && ecs->event_thread->suspend.stop_signal != TARGET_SIGNAL_TRAP)
+      && ecs->event_thread->suspend.stop_signal != GDB_SIGNAL_TRAP)
     {
       /* We took a signal (which we are supposed to pass through to
         the inferior, else we'd not get here) and we haven't yet
@@ -5753,9 +5708,9 @@ keep_going (struct execution_control_state *ecs)
          simulator; the simulator then delivers the hardware
          equivalent of a SIGNAL_TRAP to the program being debugged.  */
 
-      if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+      if (ecs->event_thread->suspend.stop_signal == GDB_SIGNAL_TRAP
          && !signal_program[ecs->event_thread->suspend.stop_signal])
-       ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
+       ecs->event_thread->suspend.stop_signal = GDB_SIGNAL_0;
 
       discard_cleanups (old_cleanups);
       resume (currently_stepping (ecs->event_thread),
@@ -5806,7 +5761,7 @@ print_end_stepping_range_reason (void)
 /* The inferior was terminated by a signal, print why it stopped.  */
 
 static void
-print_signal_exited_reason (enum target_signal siggnal)
+print_signal_exited_reason (enum gdb_signal siggnal)
 {
   struct ui_out *uiout = current_uiout;
 
@@ -5817,12 +5772,12 @@ print_signal_exited_reason (enum target_signal siggnal)
   ui_out_text (uiout, "\nProgram terminated with signal ");
   annotate_signal_name ();
   ui_out_field_string (uiout, "signal-name",
-                      target_signal_to_name (siggnal));
+                      gdb_signal_to_name (siggnal));
   annotate_signal_name_end ();
   ui_out_text (uiout, ", ");
   annotate_signal_string ();
   ui_out_field_string (uiout, "signal-meaning",
-                      target_signal_to_string (siggnal));
+                      gdb_signal_to_string (siggnal));
   annotate_signal_string_end ();
   ui_out_text (uiout, ".\n");
   ui_out_text (uiout, "The program no longer exists.\n");
@@ -5870,13 +5825,13 @@ print_exited_reason (int exitstatus)
    tells us to print about it.  */
 
 static void
-print_signal_received_reason (enum target_signal siggnal)
+print_signal_received_reason (enum gdb_signal siggnal)
 {
   struct ui_out *uiout = current_uiout;
 
   annotate_signal ();
 
-  if (siggnal == TARGET_SIGNAL_0 && !ui_out_is_mi_like_p (uiout))
+  if (siggnal == GDB_SIGNAL_0 && !ui_out_is_mi_like_p (uiout))
     {
       struct thread_info *t = inferior_thread ();
 
@@ -5894,12 +5849,12 @@ print_signal_received_reason (enum target_signal siggnal)
        ui_out_field_string
          (uiout, "reason", async_reason_lookup (EXEC_ASYNC_SIGNAL_RECEIVED));
       ui_out_field_string (uiout, "signal-name",
-                          target_signal_to_name (siggnal));
+                          gdb_signal_to_name (siggnal));
       annotate_signal_name_end ();
       ui_out_text (uiout, ", ");
       annotate_signal_string ();
       ui_out_field_string (uiout, "signal-meaning",
-                          target_signal_to_string (siggnal));
+                          gdb_signal_to_string (siggnal));
       annotate_signal_string_end ();
     }
   ui_out_text (uiout, ".\n");
@@ -6209,7 +6164,7 @@ signal_cache_update (int signo)
 {
   if (signo == -1)
     {
-      for (signo = 0; signo < (int) TARGET_SIGNAL_LAST; signo++)
+      for (signo = 0; signo < (int) GDB_SIGNAL_LAST; signo++)
        signal_cache_update (signo);
 
       return;
@@ -6258,9 +6213,9 @@ sig_print_header (void)
 }
 
 static void
-sig_print_info (enum target_signal oursig)
+sig_print_info (enum gdb_signal oursig)
 {
-  const char *name = target_signal_to_name (oursig);
+  const char *name = gdb_signal_to_name (oursig);
   int name_padding = 13 - strlen (name);
 
   if (name_padding <= 0)
@@ -6271,7 +6226,7 @@ sig_print_info (enum target_signal oursig)
   printf_filtered ("%s\t", signal_stop[oursig] ? "Yes" : "No");
   printf_filtered ("%s\t", signal_print[oursig] ? "Yes" : "No");
   printf_filtered ("%s\t\t", signal_program[oursig] ? "Yes" : "No");
-  printf_filtered ("%s\n", target_signal_to_string (oursig));
+  printf_filtered ("%s\n", gdb_signal_to_string (oursig));
 }
 
 /* Specify how various signals in the inferior should be handled.  */
@@ -6282,7 +6237,7 @@ handle_command (char *args, int from_tty)
   char **argv;
   int digits, wordlen;
   int sigfirst, signum, siglast;
-  enum target_signal oursig;
+  enum gdb_signal oursig;
   int allsigs;
   int nsigs;
   unsigned char *sigs;
@@ -6295,7 +6250,7 @@ handle_command (char *args, int from_tty)
 
   /* Allocate and zero an array of flags for which signals to handle.  */
 
-  nsigs = (int) TARGET_SIGNAL_LAST;
+  nsigs = (int) GDB_SIGNAL_LAST;
   sigs = (unsigned char *) alloca (nsigs);
   memset (sigs, 0, nsigs);
 
@@ -6369,11 +6324,11 @@ handle_command (char *args, int from_tty)
             SIGHUP, SIGINT, SIGALRM, etc. will work right anyway.  */
 
          sigfirst = siglast = (int)
-           target_signal_from_command (atoi (*argv));
+           gdb_signal_from_command (atoi (*argv));
          if ((*argv)[digits] == '-')
            {
              siglast = (int)
-               target_signal_from_command (atoi ((*argv) + digits + 1));
+               gdb_signal_from_command (atoi ((*argv) + digits + 1));
            }
          if (sigfirst > siglast)
            {
@@ -6385,8 +6340,8 @@ handle_command (char *args, int from_tty)
        }
       else
        {
-         oursig = target_signal_from_name (*argv);
-         if (oursig != TARGET_SIGNAL_UNKNOWN)
+         oursig = gdb_signal_from_name (*argv);
+         if (oursig != GDB_SIGNAL_UNKNOWN)
            {
              sigfirst = siglast = (int) oursig;
            }
@@ -6402,15 +6357,15 @@ handle_command (char *args, int from_tty)
 
       for (signum = sigfirst; signum >= 0 && signum <= siglast; signum++)
        {
-         switch ((enum target_signal) signum)
+         switch ((enum gdb_signal) signum)
            {
-           case TARGET_SIGNAL_TRAP:
-           case TARGET_SIGNAL_INT:
+           case GDB_SIGNAL_TRAP:
+           case GDB_SIGNAL_INT:
              if (!allsigs && !sigs[signum])
                {
                  if (query (_("%s is used by the debugger.\n\
 Are you sure you want to change it? "),
-                            target_signal_to_name ((enum target_signal) signum)))
+                            gdb_signal_to_name ((enum gdb_signal) signum)))
                    {
                      sigs[signum] = 1;
                    }
@@ -6421,9 +6376,9 @@ Are you sure you want to change it? "),
                    }
                }
              break;
-           case TARGET_SIGNAL_0:
-           case TARGET_SIGNAL_DEFAULT:
-           case TARGET_SIGNAL_UNKNOWN:
+           case GDB_SIGNAL_0:
+           case GDB_SIGNAL_DEFAULT:
+           case GDB_SIGNAL_UNKNOWN:
              /* Make sure that "all" doesn't print these.  */
              break;
            default:
@@ -6439,8 +6394,8 @@ Are you sure you want to change it? "),
     if (sigs[signum])
       {
        signal_cache_update (-1);
-       target_pass_signals ((int) TARGET_SIGNAL_LAST, signal_pass);
-       target_program_signals ((int) TARGET_SIGNAL_LAST, signal_program);
+       target_pass_signals ((int) GDB_SIGNAL_LAST, signal_pass);
+       target_program_signals ((int) GDB_SIGNAL_LAST, signal_program);
 
        if (from_tty)
          {
@@ -6480,9 +6435,9 @@ xdb_handle_command (char *args, int from_tty)
       if (argBuf)
        {
          int validFlag = 1;
-         enum target_signal oursig;
+         enum gdb_signal oursig;
 
-         oursig = target_signal_from_name (argv[0]);
+         oursig = gdb_signal_from_name (argv[0]);
          memset (argBuf, 0, bufLen);
          if (strcmp (argv[1], "Q") == 0)
            sprintf (argBuf, "%s %s", argv[0], "noprint");
@@ -6523,11 +6478,11 @@ xdb_handle_command (char *args, int from_tty)
   do_cleanups (old_chain);
 }
 
-enum target_signal
-target_signal_from_command (int num)
+enum gdb_signal
+gdb_signal_from_command (int num)
 {
   if (num >= 1 && num <= 15)
-    return (enum target_signal) num;
+    return (enum gdb_signal) num;
   error (_("Only signals 1-15 are valid as numeric signals.\n\
 Use \"info signals\" for a list of symbolic signals."));
 }
@@ -6540,19 +6495,19 @@ Use \"info signals\" for a list of symbolic signals."));
 static void
 signals_info (char *signum_exp, int from_tty)
 {
-  enum target_signal oursig;
+  enum gdb_signal oursig;
 
   sig_print_header ();
 
   if (signum_exp)
     {
       /* First see if this is a symbol name.  */
-      oursig = target_signal_from_name (signum_exp);
-      if (oursig == TARGET_SIGNAL_UNKNOWN)
+      oursig = gdb_signal_from_name (signum_exp);
+      if (oursig == GDB_SIGNAL_UNKNOWN)
        {
          /* No, try numeric.  */
          oursig =
-           target_signal_from_command (parse_and_eval_long (signum_exp));
+           gdb_signal_from_command (parse_and_eval_long (signum_exp));
        }
       sig_print_info (oursig);
       return;
@@ -6560,14 +6515,14 @@ signals_info (char *signum_exp, int from_tty)
 
   printf_filtered ("\n");
   /* These ugly casts brought to you by the native VAX compiler.  */
-  for (oursig = TARGET_SIGNAL_FIRST;
-       (int) oursig < (int) TARGET_SIGNAL_LAST;
-       oursig = (enum target_signal) ((int) oursig + 1))
+  for (oursig = GDB_SIGNAL_FIRST;
+       (int) oursig < (int) GDB_SIGNAL_LAST;
+       oursig = (enum gdb_signal) ((int) oursig + 1))
     {
       QUIT;
 
-      if (oursig != TARGET_SIGNAL_UNKNOWN
-         && oursig != TARGET_SIGNAL_DEFAULT && oursig != TARGET_SIGNAL_0)
+      if (oursig != GDB_SIGNAL_UNKNOWN
+         && oursig != GDB_SIGNAL_DEFAULT && oursig != GDB_SIGNAL_0)
        sig_print_info (oursig);
     }
 
@@ -6682,7 +6637,9 @@ siginfo_make_value (struct gdbarch *gdbarch, struct internalvar *var,
 struct infcall_suspend_state
 {
   struct thread_suspend_state thread_suspend;
+#if 0 /* Currently unused and empty structures are not valid C.  */
   struct inferior_suspend_state inferior_suspend;
+#endif
 
   /* Other fields:  */
   CORE_ADDR stop_pc;
@@ -6736,11 +6693,13 @@ save_infcall_suspend_state (void)
     }
 
   inf_state->thread_suspend = tp->suspend;
+#if 0 /* Currently unused and empty structures are not valid C.  */
   inf_state->inferior_suspend = inf->suspend;
+#endif
 
   /* run_inferior_call will not use the signal due to its `proceed' call with
-     TARGET_SIGNAL_0 anyway.  */
-  tp->suspend.stop_signal = TARGET_SIGNAL_0;
+     GDB_SIGNAL_0 anyway.  */
+  tp->suspend.stop_signal = GDB_SIGNAL_0;
 
   inf_state->stop_pc = stop_pc;
 
@@ -6760,7 +6719,9 @@ restore_infcall_suspend_state (struct infcall_suspend_state *inf_state)
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
 
   tp->suspend = inf_state->thread_suspend;
+#if 0 /* Currently unused and empty structures are not valid C.  */
   inf->suspend = inf_state->inferior_suspend;
+#endif
 
   stop_pc = inf_state->stop_pc;
 
@@ -7182,7 +7143,7 @@ leave it stopped or free to run as needed."),
                           &setlist,
                           &showlist);
 
-  numsigs = (int) TARGET_SIGNAL_LAST;
+  numsigs = (int) GDB_SIGNAL_LAST;
   signal_stop = (unsigned char *) xmalloc (sizeof (signal_stop[0]) * numsigs);
   signal_print = (unsigned char *)
     xmalloc (sizeof (signal_print[0]) * numsigs);
@@ -7199,39 +7160,39 @@ leave it stopped or free to run as needed."),
 
   /* Signals caused by debugger's own actions
      should not be given to the program afterwards.  */
-  signal_program[TARGET_SIGNAL_TRAP] = 0;
-  signal_program[TARGET_SIGNAL_INT] = 0;
+  signal_program[GDB_SIGNAL_TRAP] = 0;
+  signal_program[GDB_SIGNAL_INT] = 0;
 
   /* Signals that are not errors should not normally enter the debugger.  */
-  signal_stop[TARGET_SIGNAL_ALRM] = 0;
-  signal_print[TARGET_SIGNAL_ALRM] = 0;
-  signal_stop[TARGET_SIGNAL_VTALRM] = 0;
-  signal_print[TARGET_SIGNAL_VTALRM] = 0;
-  signal_stop[TARGET_SIGNAL_PROF] = 0;
-  signal_print[TARGET_SIGNAL_PROF] = 0;
-  signal_stop[TARGET_SIGNAL_CHLD] = 0;
-  signal_print[TARGET_SIGNAL_CHLD] = 0;
-  signal_stop[TARGET_SIGNAL_IO] = 0;
-  signal_print[TARGET_SIGNAL_IO] = 0;
-  signal_stop[TARGET_SIGNAL_POLL] = 0;
-  signal_print[TARGET_SIGNAL_POLL] = 0;
-  signal_stop[TARGET_SIGNAL_URG] = 0;
-  signal_print[TARGET_SIGNAL_URG] = 0;
-  signal_stop[TARGET_SIGNAL_WINCH] = 0;
-  signal_print[TARGET_SIGNAL_WINCH] = 0;
-  signal_stop[TARGET_SIGNAL_PRIO] = 0;
-  signal_print[TARGET_SIGNAL_PRIO] = 0;
+  signal_stop[GDB_SIGNAL_ALRM] = 0;
+  signal_print[GDB_SIGNAL_ALRM] = 0;
+  signal_stop[GDB_SIGNAL_VTALRM] = 0;
+  signal_print[GDB_SIGNAL_VTALRM] = 0;
+  signal_stop[GDB_SIGNAL_PROF] = 0;
+  signal_print[GDB_SIGNAL_PROF] = 0;
+  signal_stop[GDB_SIGNAL_CHLD] = 0;
+  signal_print[GDB_SIGNAL_CHLD] = 0;
+  signal_stop[GDB_SIGNAL_IO] = 0;
+  signal_print[GDB_SIGNAL_IO] = 0;
+  signal_stop[GDB_SIGNAL_POLL] = 0;
+  signal_print[GDB_SIGNAL_POLL] = 0;
+  signal_stop[GDB_SIGNAL_URG] = 0;
+  signal_print[GDB_SIGNAL_URG] = 0;
+  signal_stop[GDB_SIGNAL_WINCH] = 0;
+  signal_print[GDB_SIGNAL_WINCH] = 0;
+  signal_stop[GDB_SIGNAL_PRIO] = 0;
+  signal_print[GDB_SIGNAL_PRIO] = 0;
 
   /* These signals are used internally by user-level thread
      implementations.  (See signal(5) on Solaris.)  Like the above
      signals, a healthy program receives and handles them as part of
      its normal operation.  */
-  signal_stop[TARGET_SIGNAL_LWP] = 0;
-  signal_print[TARGET_SIGNAL_LWP] = 0;
-  signal_stop[TARGET_SIGNAL_WAITING] = 0;
-  signal_print[TARGET_SIGNAL_WAITING] = 0;
-  signal_stop[TARGET_SIGNAL_CANCEL] = 0;
-  signal_print[TARGET_SIGNAL_CANCEL] = 0;
+  signal_stop[GDB_SIGNAL_LWP] = 0;
+  signal_print[GDB_SIGNAL_LWP] = 0;
+  signal_stop[GDB_SIGNAL_WAITING] = 0;
+  signal_print[GDB_SIGNAL_WAITING] = 0;
+  signal_stop[GDB_SIGNAL_CANCEL] = 0;
+  signal_print[GDB_SIGNAL_CANCEL] = 0;
 
   /* Update cached state.  */
   signal_cache_update (-1);
@@ -7320,9 +7281,8 @@ function is skipped and the step command stops at a different source line."),
                           show_step_stop_if_no_debug,
                           &setlist, &showlist);
 
-  add_setshow_enum_cmd ("displaced-stepping", class_run,
-                       can_use_displaced_stepping_enum,
-                       &can_use_displaced_stepping, _("\
+  add_setshow_auto_boolean_cmd ("displaced-stepping", class_run,
+                               &can_use_displaced_stepping, _("\
 Set debugger's willingness to use displaced stepping."), _("\
 Show debugger's willingness to use displaced stepping."), _("\
 If on, gdb will use displaced stepping to step over breakpoints if it is\n\
@@ -7331,9 +7291,9 @@ stepping to step over breakpoints, even if such is supported by the target\n\
 architecture.  If auto (which is the default), gdb will use displaced stepping\n\
 if the target architecture supports it and non-stop mode is active, but will not\n\
 use it in all-stop mode (see help set non-stop)."),
-                       NULL,
-                       show_can_use_displaced_stepping,
-                       &setlist, &showlist);
+                               NULL,
+                               show_can_use_displaced_stepping,
+                               &setlist, &showlist);
 
   add_setshow_enum_cmd ("exec-direction", class_run, exec_direction_names,
                        &exec_direction, _("Set direction of execution.\n\
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