Remove cmd_cfunc_ftype

This removes cmd_cfunc_ftype and the non-const overload of add_cmd;
then fixes up the fallout.

For the most part this patch is straightforward.  There are a few
files (go32-nat.c, windows-nat.c, and gnu-nat.c) that I could not
compile; so I made a best effort there.

gdb/ChangeLog
2017-11-07  Tom Tromey  <tom@tromey.com>

	* go32-nat.c (go32_sysinfo, go32_sldt, go32_sgdt, go32_sidt)
	(go32_pde, go32_pte, go32_pte_for_address): Constify.
	* gnu-nat.c (_parse_bool_arg, show_thread_default_pause_cmd)
	(set_thread_default_pause_cmd, set_thread_default_run_cmd)
	(show_thread_default_run_cmd, set_thread_default_detach_sc_cmd)
	(parse_int_arg, show_thread_default_detach_sc_cmd)
	(set_signals_cmd, show_signals_cmd, set_sig_thread_cmd)
	(show_sig_thread_cmd, set_stopped_cmd, show_stopped_cmd)
	(set_exceptions_cmd, show_exceptions_cmd, set_task_pause_cmd)
	(show_task_pause_cmd, set_task_detach_sc_cmd)
	(show_task_detach_sc_cmd, set_task_exc_port_cmd)
	(set_noninvasive_cmd, set_thread_pause_cmd)
	(show_thread_pause_cmd, set_thread_run_cmd, show_thread_run_cmd)
	(set_thread_detach_sc_cmd, show_thread_detach_sc_cmd)
	(set_thread_exc_port_cmd, thread_takeover_sc_cmd): Constify.
	* windows-nat.c (display_selectors): Constify.
	* cli/cli-decode.h (struct cmd_list_element) <function>: Remove
	non-const "cfunc".
	* cli/cli-decode.c (set_cmd_cfunc): Remove non-const overload.
	(cmd_cfunc_eq): Likewise.
	(struct cmd_list_element): Likewise.
	(do_cfunc): Remove.
	(cli_user_command_p): Update.
	* command.h (add_cmd): Remove non-const overload.
	(cmd_cfunc_ftype): Remove typedef.
	(cmd_cfunc_eq): Remove non-const overload.
	* value.c (show_values): Constify.
	* thread.c (thread_apply_all_command): Constify.
	* symfile.c (load_command): Constify.
	* source.c (directory_command): Constify.
	* maint.c (maintenance_internal_error)
	(maintenance_demangler_warning, maintenance_space_display)
	(maintenance_print_architecture, maintenance_translate_address)
	(maintenance_info_selftests, maintenance_internal_warning):
	Constify.
	* breakpoint.c (disable_trace_command, enable_trace_command):
	Constify.
	* auto-load.c (info_auto_load_local_gdbinit, add_auto_load_dir):
	Constify.
	(add_auto_load_safe_path): Constify.
	* guile/scm-auto-load.c (info_auto_load_guile_scripts): Constify.
	* top.h (show_commands): Constify.
	* linux-thread-db.c (info_auto_load_libthread_db): Constify.
	* sparc64-tdep.c (adi_examine_command): Constify.
	(adi_assign_command): Constify.

18 files changed, 123 insertions, 134 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 94cee5f..a19e628 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,53 @@
 2017-11-07  Tom Tromey  <tom@tromey.com>
 
+	* go32-nat.c (go32_sysinfo, go32_sldt, go32_sgdt, go32_sidt)
+	(go32_pde, go32_pte, go32_pte_for_address): Constify.
+	* gnu-nat.c (_parse_bool_arg, show_thread_default_pause_cmd)
+	(set_thread_default_pause_cmd, set_thread_default_run_cmd)
+	(show_thread_default_run_cmd, set_thread_default_detach_sc_cmd)
+	(parse_int_arg, show_thread_default_detach_sc_cmd)
+	(set_signals_cmd, show_signals_cmd, set_sig_thread_cmd)
+	(show_sig_thread_cmd, set_stopped_cmd, show_stopped_cmd)
+	(set_exceptions_cmd, show_exceptions_cmd, set_task_pause_cmd)
+	(show_task_pause_cmd, set_task_detach_sc_cmd)
+	(show_task_detach_sc_cmd, set_task_exc_port_cmd)
+	(set_noninvasive_cmd, set_thread_pause_cmd)
+	(show_thread_pause_cmd, set_thread_run_cmd, show_thread_run_cmd)
+	(set_thread_detach_sc_cmd, show_thread_detach_sc_cmd)
+	(set_thread_exc_port_cmd, thread_takeover_sc_cmd): Constify.
+	* windows-nat.c (display_selectors): Constify.
+	* cli/cli-decode.h (struct cmd_list_element) <function>: Remove
+	non-const "cfunc".
+	* cli/cli-decode.c (set_cmd_cfunc): Remove non-const overload.
+	(cmd_cfunc_eq): Likewise.
+	(struct cmd_list_element): Likewise.
+	(do_cfunc): Remove.
+	(cli_user_command_p): Update.
+	* command.h (add_cmd): Remove non-const overload.
+	(cmd_cfunc_ftype): Remove typedef.
+	(cmd_cfunc_eq): Remove non-const overload.
+	* value.c (show_values): Constify.
+	* thread.c (thread_apply_all_command): Constify.
+	* symfile.c (load_command): Constify.
+	* source.c (directory_command): Constify.
+	* maint.c (maintenance_internal_error)
+	(maintenance_demangler_warning, maintenance_space_display)
+	(maintenance_print_architecture, maintenance_translate_address)
+	(maintenance_info_selftests, maintenance_internal_warning):
+	Constify.
+	* breakpoint.c (disable_trace_command, enable_trace_command):
+	Constify.
+	* auto-load.c (info_auto_load_local_gdbinit, add_auto_load_dir):
+	Constify.
+	(add_auto_load_safe_path): Constify.
+	* guile/scm-auto-load.c (info_auto_load_guile_scripts): Constify.
+	* top.h (show_commands): Constify.
+	* linux-thread-db.c (info_auto_load_libthread_db): Constify.
+	* sparc64-tdep.c (adi_examine_command): Constify.
+	(adi_assign_command): Constify.
+
+2017-11-07  Tom Tromey  <tom@tromey.com>
+
 	* frame.h (info_locals_command, info_args_command): Constify.
 	* auto-load.h (auto_load_info_scripts): Constify.
 	* inferior.h (registers_info): Constify.
diff --git a/gdb/auto-load.c b/gdb/auto-load.c
index 47533da..63366df 100644
--- a/gdb/auto-load.c
+++ b/gdb/auto-load.c
@@ -301,7 +301,7 @@ show_auto_load_safe_path (struct ui_file *file, int from_tty,
    variable.  */
 
 static void
-add_auto_load_safe_path (char *args, int from_tty)
+add_auto_load_safe_path (const char *args, int from_tty)
 {
   char *s;
 
@@ -322,7 +322,7 @@ Use 'set auto-load safe-path /' for disabling the auto-load safe-path security.\
    variable.  */
 
 static void
-add_auto_load_dir (char *args, int from_tty)
+add_auto_load_dir (const char *args, int from_tty)
 {
   char *s;
 
@@ -1381,7 +1381,7 @@ info_auto_load_gdb_scripts (const char *pattern, int from_tty)
 /* Implement 'info auto-load local-gdbinit'.  */
 
 static void
-info_auto_load_local_gdbinit (char *args, int from_tty)
+info_auto_load_local_gdbinit (const char *args, int from_tty)
 {
   if (auto_load_local_gdbinit_pathname == NULL)
     printf_filtered (_("Local .gdbinit file was not found.\n"));
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 5645ecd..0d78141 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -226,10 +226,6 @@ static int is_hardware_watchpoint (const struct breakpoint *bpt);
 
 static void insert_breakpoint_locations (void);
 
-static void enable_trace_command (char *, int);
-
-static void disable_trace_command (char *, int);
-
 static void trace_pass_command (const char *, int);
 
 static void set_tracepoint_count (int num);
@@ -14928,7 +14924,7 @@ info_tracepoints_command (const char *args, int from_tty)
 /* The 'enable trace' command enables tracepoints.
    Not supported by all targets.  */
 static void
-enable_trace_command (char *args, int from_tty)
+enable_trace_command (const char *args, int from_tty)
 {
   enable_command (args, from_tty);
 }
@@ -14936,7 +14932,7 @@ enable_trace_command (char *args, int from_tty)
 /* The 'disable trace' command disables tracepoints.
    Not supported by all targets.  */
 static void
-disable_trace_command (char *args, int from_tty)
+disable_trace_command (const char *args, int from_tty)
 {
   disable_command (args, from_tty);
 }
diff --git a/gdb/cli/cli-decode.c b/gdb/cli/cli-decode.c
index 0c55526..459438e 100644
--- a/gdb/cli/cli-decode.c
+++ b/gdb/cli/cli-decode.c
@@ -101,22 +101,6 @@ print_help_for_command (struct cmd_list_element *c, const char *prefix,
    bounce function (unless cfunc / sfunc is NULL that is).  */
 
 static void
-do_cfunc (struct cmd_list_element *c, char *args, int from_tty)
-{
-  c->function.cfunc (args, from_tty);
-}
-
-static void
-set_cmd_cfunc (struct cmd_list_element *cmd, cmd_cfunc_ftype *cfunc)
-{
-  if (cfunc == NULL)
-    cmd->func = NULL;
-  else
-    cmd->func = do_cfunc;
-  cmd->function.cfunc = cfunc;
-}
-
-static void
 do_const_cfunc (struct cmd_list_element *c, char *args, int from_tty)
 {
   c->function.const_cfunc (args, from_tty);
@@ -149,12 +133,6 @@ set_cmd_sfunc (struct cmd_list_element *cmd, cmd_sfunc_ftype *sfunc)
 }
 
 int
-cmd_cfunc_eq (struct cmd_list_element *cmd, cmd_cfunc_ftype *cfunc)
-{
-  return cmd->func == do_cfunc && cmd->function.cfunc == cfunc;
-}
-
-int
 cmd_cfunc_eq (struct cmd_list_element *cmd, cmd_const_cfunc_ftype *cfunc)
 {
   return cmd->func == do_const_cfunc && cmd->function.const_cfunc == cfunc;
@@ -281,21 +259,12 @@ do_add_cmd (const char *name, enum command_class theclass,
 }
 
 struct cmd_list_element *
-add_cmd (const char *name, enum command_class theclass, cmd_cfunc_ftype *fun,
-	 const char *doc, struct cmd_list_element **list)
-{
-  cmd_list_element *result = do_add_cmd (name, theclass, doc, list);
-  set_cmd_cfunc (result, fun);
-  return result;
-}
-
-struct cmd_list_element *
 add_cmd (const char *name, enum command_class theclass,
 	 const char *doc, struct cmd_list_element **list)
 {
   cmd_list_element *result = do_add_cmd (name, theclass, doc, list);
   result->func = NULL;
-  result->function.cfunc = NULL; /* Ok.  */
+  result->function.const_cfunc = NULL;
   return result;
 }
 
@@ -1960,6 +1929,5 @@ int
 cli_user_command_p (struct cmd_list_element *cmd)
 {
   return (cmd->theclass == class_user
-	  && (cmd->func == do_cfunc || cmd->func == do_sfunc
-	      || cmd->func == do_const_cfunc));
+	  && (cmd->func == do_const_cfunc || cmd->func == do_sfunc));
 }
diff --git a/gdb/cli/cli-decode.h b/gdb/cli/cli-decode.h
index 76f3ca9..e3ac69b 100644
--- a/gdb/cli/cli-decode.h
+++ b/gdb/cli/cli-decode.h
@@ -113,8 +113,6 @@ struct cmd_list_element
     union
       {
 	/* If type is not_set_cmd, call it like this: */
-	cmd_cfunc_ftype *cfunc;
-	/* ... or like this.  */
 	cmd_const_cfunc_ftype *const_cfunc;
 	/* If type is set_cmd or show_cmd, first set the variables,
 	   and then call this: */
diff --git a/gdb/command.h b/gdb/command.h
index 258f7f7..cbcf523 100644
--- a/gdb/command.h
+++ b/gdb/command.h
@@ -116,7 +116,6 @@ var_types;
 /* This structure records one command'd definition.  */
 struct cmd_list_element;
 
-typedef void cmd_cfunc_ftype (char *args, int from_tty);
 typedef void cmd_const_cfunc_ftype (const char *args, int from_tty);
 
 /* This structure specifies notifications to be suppressed by a cli
@@ -136,11 +135,6 @@ extern struct cli_suppress_notification cli_suppress_notification;
 
 extern int valid_user_defined_cmd_name_p (const char *name);
 
-extern struct cmd_list_element *add_cmd (const char *, enum command_class,
-					 cmd_cfunc_ftype *fun,
-					 const char *,
-					 struct cmd_list_element **);
-
 /* Const-correct variant of the above.  */
 
 extern struct cmd_list_element *add_cmd (const char *, enum command_class,
@@ -213,8 +207,6 @@ extern void set_cmd_completer_handle_brkchars (struct cmd_list_element *,
 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
    around in cmd objects to test the value of the commands sfunc().  */
 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
-			 cmd_cfunc_ftype *cfun);
-extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
 			 cmd_const_cfunc_ftype *cfun);
 
 /* Each command object has a local context attached to it.  */
diff --git a/gdb/gnu-nat.c b/gdb/gnu-nat.c
index 609ba50..0d500ea 100644
--- a/gdb/gnu-nat.c
+++ b/gdb/gnu-nat.c
@@ -2742,7 +2742,7 @@ show_thread_default_cmd (const char *args, int from_tty)
 }
 
 static int
-parse_int_arg (char *args, char *cmd_prefix)
+parse_int_arg (const char *args, char *cmd_prefix)
 {
   if (args)
     {
@@ -2757,7 +2757,7 @@ parse_int_arg (char *args, char *cmd_prefix)
 }
 
 static int
-_parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix)
+_parse_bool_arg (const char *args, char *t_val, char *f_val, char *cmd_prefix)
 {
   if (!args || strcmp (args, t_val) == 0)
     return 1;
@@ -2818,13 +2818,13 @@ set_task_pause_cmd (int arg, int from_tty)
 }
 
 static void
-set_task_pause_cmd (char *args, int from_tty)
+set_task_pause_cmd (const char *args, int from_tty)
 {
   set_task_pause_cmd (parse_bool_arg (args, "set task pause"), from_tty);
 }
 
 static void
-show_task_pause_cmd (char *args, int from_tty)
+show_task_pause_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2836,14 +2836,14 @@ show_task_pause_cmd (char *args, int from_tty)
 }
 
 static void
-set_task_detach_sc_cmd (char *args, int from_tty)
+set_task_detach_sc_cmd (const char *args, int from_tty)
 {
   cur_inf ()->detach_sc = parse_int_arg (args,
 					 "set task detach-suspend-count");
 }
 
 static void
-show_task_detach_sc_cmd (char *args, int from_tty)
+show_task_detach_sc_cmd (const char *args, int from_tty)
 {
   check_empty (args, "show task detach-suspend-count");
   printf_unfiltered ("The inferior task will be left with a "
@@ -2853,7 +2853,7 @@ show_task_detach_sc_cmd (char *args, int from_tty)
 
 
 static void
-set_thread_default_pause_cmd (char *args, int from_tty)
+set_thread_default_pause_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2862,7 +2862,7 @@ set_thread_default_pause_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_default_pause_cmd (char *args, int from_tty)
+show_thread_default_pause_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
   int sc = inf->default_thread_pause_sc;
@@ -2874,7 +2874,7 @@ show_thread_default_pause_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_default_run_cmd (char *args, int from_tty)
+set_thread_default_run_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2883,7 +2883,7 @@ set_thread_default_run_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_default_run_cmd (char *args, int from_tty)
+show_thread_default_run_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2893,14 +2893,14 @@ show_thread_default_run_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_default_detach_sc_cmd (char *args, int from_tty)
+set_thread_default_detach_sc_cmd (const char *args, int from_tty)
 {
   cur_inf ()->default_thread_detach_sc =
     parse_int_arg (args, "set thread default detach-suspend-count");
 }
 
 static void
-show_thread_default_detach_sc_cmd (char *args, int from_tty)
+show_thread_default_detach_sc_cmd (const char *args, int from_tty)
 {
   check_empty (args, "show thread default detach-suspend-count");
   printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
@@ -2946,7 +2946,7 @@ steal_exc_port (struct proc *proc, mach_port_t name)
 }
 
 static void
-set_task_exc_port_cmd (char *args, int from_tty)
+set_task_exc_port_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2956,13 +2956,13 @@ set_task_exc_port_cmd (char *args, int from_tty)
 }
 
 static void
-set_stopped_cmd (char *args, int from_tty)
+set_stopped_cmd (const char *args, int from_tty)
 {
   cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped");
 }
 
 static void
-show_stopped_cmd (char *args, int from_tty)
+show_stopped_cmd (const char *args, int from_tty)
 {
   struct inf *inf = active_inf ();
 
@@ -2972,7 +2972,7 @@ show_stopped_cmd (char *args, int from_tty)
 }
 
 static void
-set_sig_thread_cmd (char *args, int from_tty)
+set_sig_thread_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -2990,7 +2990,7 @@ set_sig_thread_cmd (char *args, int from_tty)
 }
 
 static void
-show_sig_thread_cmd (char *args, int from_tty)
+show_sig_thread_cmd (const char *args, int from_tty)
 {
   struct inf *inf = active_inf ();
 
@@ -3016,13 +3016,13 @@ set_signals_cmd (int arg, int from_tty)
 }
 
 static void
-set_signals_cmd (char *args, int from_tty)
+set_signals_cmd (const char *args, int from_tty)
 {
   set_signals_cmd(parse_bool_arg (args, "set signals"), from_tty);
 }
 
 static void
-show_signals_cmd (char *args, int from_tty)
+show_signals_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -3045,13 +3045,13 @@ set_exceptions_cmd (int arg, int from_tty)
 }
 
 static void
-set_exceptions_cmd (char *args, int from_tty)
+set_exceptions_cmd (const char *args, int from_tty)
 {
   set_exceptions_cmd (parse_bool_arg (args, "set exceptions"), from_tty);
 }
 
 static void
-show_exceptions_cmd (char *args, int from_tty)
+show_exceptions_cmd (const char *args, int from_tty)
 {
   struct inf *inf = cur_inf ();
 
@@ -3099,7 +3099,7 @@ show_task_cmd (const char *args, int from_tty)
 
 
 static void
-set_noninvasive_cmd (char *args, int from_tty)
+set_noninvasive_cmd (const char *args, int from_tty)
 {
   /* Invert the sense of the arg for each component.  */
   int inv_arg = parse_bool_arg (args, "set noninvasive") ? 0 : 1;
@@ -3301,7 +3301,7 @@ This is the same as setting `task pause', `exceptions', and\n\
 
 
 static void
-set_thread_pause_cmd (char *args, int from_tty)
+set_thread_pause_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
   int old_sc = thread->pause_sc;
@@ -3314,7 +3314,7 @@ set_thread_pause_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_pause_cmd (char *args, int from_tty)
+show_thread_pause_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
   int sc = thread->pause_sc;
@@ -3327,7 +3327,7 @@ show_thread_pause_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_run_cmd (char *args, int from_tty)
+set_thread_run_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3335,7 +3335,7 @@ set_thread_run_cmd (char *args, int from_tty)
 }
 
 static void
-show_thread_run_cmd (char *args, int from_tty)
+show_thread_run_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3346,14 +3346,14 @@ show_thread_run_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_detach_sc_cmd (char *args, int from_tty)
+set_thread_detach_sc_cmd (const char *args, int from_tty)
 {
   cur_thread ()->detach_sc = parse_int_arg (args,
 					    "set thread detach-suspend-count");
 }
 
 static void
-show_thread_detach_sc_cmd (char *args, int from_tty)
+show_thread_detach_sc_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3365,7 +3365,7 @@ show_thread_detach_sc_cmd (char *args, int from_tty)
 }
 
 static void
-set_thread_exc_port_cmd (char *args, int from_tty)
+set_thread_exc_port_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
@@ -3389,7 +3389,7 @@ show_thread_cmd (char *args, int from_tty)
 #endif
 
 static void
-thread_takeover_sc_cmd (char *args, int from_tty)
+thread_takeover_sc_cmd (const char *args, int from_tty)
 {
   struct proc *thread = cur_thread ();
 
diff --git a/gdb/go32-nat.c b/gdb/go32-nat.c
index 6abd734..5bf262f 100644
--- a/gdb/go32-nat.c
+++ b/gdb/go32-nat.c
@@ -1061,7 +1061,7 @@ print_mem (unsigned long datum, const char *header, int in_pages_p)
 
 /* Display assorted information about the underlying OS.  */
 static void
-go32_sysinfo (char *arg, int from_tty)
+go32_sysinfo (const char *arg, int from_tty)
 {
   static const char test_pattern[] =
     "deadbeafdeadbeafdeadbeafdeadbeafdeadbeaf"
@@ -1658,7 +1658,7 @@ display_descriptor (unsigned type, unsigned long base_addr, int idx, int force)
 }
 
 static void
-go32_sldt (char *arg, int from_tty)
+go32_sldt (const char *arg, int from_tty)
 {
   struct dtr_reg gdtr;
   unsigned short ldtr = 0;
@@ -1731,7 +1731,7 @@ go32_sldt (char *arg, int from_tty)
 }
 
 static void
-go32_sgdt (char *arg, int from_tty)
+go32_sgdt (const char *arg, int from_tty)
 {
   struct dtr_reg gdtr;
   long gdt_entry = -1L;
@@ -1772,7 +1772,7 @@ go32_sgdt (char *arg, int from_tty)
 }
 
 static void
-go32_sidt (char *arg, int from_tty)
+go32_sidt (const char *arg, int from_tty)
 {
   struct dtr_reg idtr;
   long idt_entry = -1L;
@@ -1944,7 +1944,7 @@ display_ptable_entry (unsigned long entry, int is_dir, int force, unsigned off)
 }
 
 static void
-go32_pde (char *arg, int from_tty)
+go32_pde (const char *arg, int from_tty)
 {
   long pde_idx = -1, i;
 
@@ -1994,7 +1994,7 @@ display_page_table (long n, int force)
 }
 
 static void
-go32_pte (char *arg, int from_tty)
+go32_pte (const char *arg, int from_tty)
 {
   long pde_idx = -1L, i;
 
@@ -2021,7 +2021,7 @@ go32_pte (char *arg, int from_tty)
 }
 
 static void
-go32_pte_for_address (char *arg, int from_tty)
+go32_pte_for_address (const char *arg, int from_tty)
 {
   CORE_ADDR addr = 0, i;
 
diff --git a/gdb/guile/scm-auto-load.c b/gdb/guile/scm-auto-load.c
index 8a04e9c..29f7357 100644
--- a/gdb/guile/scm-auto-load.c
+++ b/gdb/guile/scm-auto-load.c
@@ -53,7 +53,7 @@ gdbscm_auto_load_enabled (const struct extension_language_defn *extlang)
 /* Wrapper for "info auto-load guile-scripts".  */
 
 static void
-info_auto_load_guile_scripts (char *pattern, int from_tty)
+info_auto_load_guile_scripts (const char *pattern, int from_tty)
 {
   auto_load_info_scripts (pattern, from_tty, &extension_language_guile);
 }
diff --git a/gdb/linux-thread-db.c b/gdb/linux-thread-db.c
index 453505b..1acb6ce0 100644
--- a/gdb/linux-thread-db.c
+++ b/gdb/linux-thread-db.c
@@ -1580,7 +1580,7 @@ info_auto_load_libthread_db_compare (const void *ap, const void *bp)
 /* Implement 'info auto-load libthread-db'.  */
 
 static void
-info_auto_load_libthread_db (char *args, int from_tty)
+info_auto_load_libthread_db (const char *args, int from_tty)
 {
   struct ui_out *uiout = current_uiout;
   const char *cs = args ? args : "";
diff --git a/gdb/maint.c b/gdb/maint.c
index 65a056b..94293d5 100644
--- a/gdb/maint.c
+++ b/gdb/maint.c
@@ -44,10 +44,6 @@
 #include "cli/cli-utils.h"
 #include "cli/cli-setshow.h"
 
-static void maintenance_internal_error (char *args, int from_tty);
-
-static void maintenance_space_display (char *, int);
-
 static void maintenance_do_deprecate (const char *, int);
 
 /* Set this to the maximum number of seconds to wait instead of waiting forever
@@ -98,7 +94,7 @@ maintenance_dump_me (const char *args, int from_tty)
    GDB.  */
 
 static void
-maintenance_internal_error (char *args, int from_tty)
+maintenance_internal_error (const char *args, int from_tty)
 {
   internal_error (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));
 }
@@ -109,7 +105,7 @@ maintenance_internal_error (char *args, int from_tty)
    GDB.  */
 
 static void
-maintenance_internal_warning (char *args, int from_tty)
+maintenance_internal_warning (const char *args, int from_tty)
 {
   internal_warning (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));
 }
@@ -118,7 +114,7 @@ maintenance_internal_warning (char *args, int from_tty)
    demangler problem is detected.  Allows testing of the mechanism.  */
 
 static void
-maintenance_demangler_warning (char *args, int from_tty)
+maintenance_demangler_warning (const char *args, int from_tty)
 {
   demangler_warning (__FILE__, __LINE__, "%s", (args == NULL ? "" : args));
 }
@@ -143,7 +139,7 @@ maintenance_time_display (const char *args, int from_tty)
 }
 
 static void
-maintenance_space_display (char *args, int from_tty)
+maintenance_space_display (const char *args, int from_tty)
 {
   if (args == NULL || *args == '\0')
     printf_unfiltered ("\"maintenance space\" takes a numeric argument.\n");
@@ -394,7 +390,7 @@ maintenance_print_statistics (const char *args, int from_tty)
 }
 
 static void
-maintenance_print_architecture (char *args, int from_tty)
+maintenance_print_architecture (const char *args, int from_tty)
 {
   struct gdbarch *gdbarch = get_current_arch ();
 
@@ -429,11 +425,11 @@ maintenance_print_command (const char *arg, int from_tty)
    or   maintenance translate-address <addr>.  */
 
 static void
-maintenance_translate_address (char *arg, int from_tty)
+maintenance_translate_address (const char *arg, int from_tty)
 {
   CORE_ADDR address;
   struct obj_section *sect;
-  char *p;
+  const char *p;
   struct bound_minimal_symbol sym;
   struct objfile *objfile;
 
@@ -449,12 +445,13 @@ maintenance_translate_address (char *arg, int from_tty)
 	p++;
       if (*p == '\000')		/* End of command?  */
 	error (_("Need to specify <section-name> and <address>"));
-      *p++ = '\000';
-      p = skip_spaces (p);
+
+      int arg_len = p - arg;
+      p = skip_spaces (p + 1);
 
       ALL_OBJSECTIONS (objfile, sect)
       {
-	if (strcmp (sect->the_bfd_section->name, arg) == 0)
+	if (strncmp (sect->the_bfd_section->name, arg, arg_len) == 0)
 	  break;
       }
 
@@ -946,7 +943,7 @@ maintenance_selftest (const char *args, int from_tty)
 }
 
 static void
-maintenance_info_selftests (char *arg, int from_tty)
+maintenance_info_selftests (const char *arg, int from_tty)
 {
   printf_filtered ("Registered selftests:\n");
   selftests::for_each_selftest ([] (const std::string &name) {
diff --git a/gdb/source.c b/gdb/source.c
index cefc612..b0bb482 100644
--- a/gdb/source.c
+++ b/gdb/source.c
@@ -411,7 +411,7 @@ init_source_path (void)
 /* Add zero or more directories to the front of the source path.  */
 
 static void
-directory_command (char *dirname, int from_tty)
+directory_command (const char *dirname, int from_tty)
 {
   dont_repeat ();
   /* FIXME, this goes to "delete dir"...  */
diff --git a/gdb/sparc64-tdep.c b/gdb/sparc64-tdep.c
index eade046..55aef13 100644
--- a/gdb/sparc64-tdep.c
+++ b/gdb/sparc64-tdep.c
@@ -452,7 +452,7 @@ do_assign (CORE_ADDR start, size_t bcnt, int version)
      adi (examine|x)/count <addr> */
 
 static void
-adi_examine_command (char *args, int from_tty)
+adi_examine_command (const char *args, int from_tty)
 {
   /* make sure program is active and adi is available */
   if (!target_has_execution)
@@ -464,7 +464,7 @@ adi_examine_command (char *args, int from_tty)
   pid_t pid = ptid_get_pid (inferior_ptid);
   sparc64_adi_info *proc = get_adi_info_proc (pid);
   int cnt = 1;
-  char *p = args;
+  const char *p = args;
   if (p && *p == '/')
     {
       p++;
@@ -487,7 +487,7 @@ adi_examine_command (char *args, int from_tty)
      adi (assign|a)/count <addr> = <version>  */
 
 static void
-adi_assign_command (char *args, int from_tty)
+adi_assign_command (const char *args, int from_tty)
 {
   /* make sure program is active and adi is available */
   if (!target_has_execution)
@@ -496,7 +496,7 @@ adi_assign_command (char *args, int from_tty)
   if (!adi_available ())
     error (_("No ADI information"));
 
-  char *exp = args;
+  const char *exp = args;
   if (exp == 0)
     error_no_arg (_("Usage: adi assign|a[/count] <addr> = <version>"));
 
@@ -507,7 +507,7 @@ adi_assign_command (char *args, int from_tty)
     error (_("Usage: adi assign|a[/count] <addr> = <version>"));
 
   size_t cnt = 1;
-  char *p = args;
+  const char *p = args;
   if (exp && *exp == '/')
     {
       p = exp + 1;
diff --git a/gdb/symfile.c b/gdb/symfile.c
index 8cc76e3..c29ab8e 100644
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -84,8 +84,6 @@ int readnow_symbol_files;	/* Read full symbols immediately.  */
 
 /* Functions this file defines.  */
 
-static void load_command (char *, int);
-
 static void symbol_file_add_main_1 (const char *args, symfile_add_flags add_flags,
 				    objfile_flags flags);
 
@@ -1791,7 +1789,7 @@ find_sym_fns (bfd *abfd)
 /* This function runs the load command of our current target.  */
 
 static void
-load_command (char *arg, int from_tty)
+load_command (const char *arg, int from_tty)
 {
   struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
 
@@ -1804,7 +1802,7 @@ load_command (char *arg, int from_tty)
 
   if (arg == NULL)
     {
-      char *parg;
+      const char *parg;
       int count = 0;
 
       parg = arg = get_exec_file (1);
@@ -1821,7 +1819,7 @@ load_command (char *arg, int from_tty)
 	  /* We need to quote this string so buildargv can pull it apart.  */
 	  char *temp = (char *) xmalloc (strlen (arg) + count + 1 );
 	  char *ptemp = temp;
-	  char *prev;
+	  const char *prev;
 
 	  make_cleanup (xfree, temp);
 
diff --git a/gdb/thread.c b/gdb/thread.c
index 7309302..1e81a61 100644
--- a/gdb/thread.c
+++ b/gdb/thread.c
@@ -60,7 +60,6 @@ static int highest_thread_num;
    spawned new threads we haven't heard of yet.  */
 static int threads_executing;
 
-static void thread_apply_all_command (char *, int);
 static int thread_alive (struct thread_info *);
 
 /* RAII type used to increase / decrease the refcount of each thread
@@ -1652,7 +1651,7 @@ tp_array_compar (const thread_info *a, const thread_info *b)
    thread apply all p x/i $pc   Apply x/i $pc cmd to all threads.  */
 
 static void
-thread_apply_all_command (char *cmd, int from_tty)
+thread_apply_all_command (const char *cmd, int from_tty)
 {
   tp_array_compar_ascending = false;
   if (cmd != NULL
@@ -1667,10 +1666,6 @@ thread_apply_all_command (char *cmd, int from_tty)
 
   update_thread_list ();
 
-  /* Save a copy of the command in case it is clobbered by
-     execute_command.  */
-  std::string saved_cmd = cmd;
-
   int tc = live_threads_count ();
   if (tc != 0)
     {
@@ -1708,10 +1703,11 @@ thread_apply_all_command (char *cmd, int from_tty)
 	    printf_filtered (_("\nThread %s (%s):\n"),
 			     print_thread_id (thr),
 			     target_pid_to_str (inferior_ptid));
-	    execute_command (cmd, from_tty);
 
-	    /* Restore exact command used previously.  */
-	    strcpy (cmd, saved_cmd.c_str ());
+	    /* Use a copy of the command in case it is clobbered by
+	       execute_command.  */
+	    std::string copy = cmd;
+	    execute_command (&copy[0], from_tty);
 	  }
     }
 }
diff --git a/gdb/top.h b/gdb/top.h
index 66f72df..d265d6b 100644
--- a/gdb/top.h
+++ b/gdb/top.h
@@ -281,7 +281,7 @@ extern char *lim_at_start;
 
 extern void gdb_add_history (const char *);
 
-extern void show_commands (char *args, int from_tty);
+extern void show_commands (const char *args, int from_tty);
 
 extern void set_history (const char *, int);
 
diff --git a/gdb/value.c b/gdb/value.c
index d8d40c2..5225e4e 100644
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -880,10 +880,6 @@ value_contents_eq (const struct value *val1, LONGEST offset1,
 				 length * TARGET_CHAR_BIT);
 }
 
-/* Prototypes for local functions.  */
-
-static void show_values (char *, int);
-
 
 /* The value-history records all the values printed
    by print commands during this session.  Each chunk
@@ -1963,7 +1959,7 @@ access_value_history (int num)
 }
 
 static void
-show_values (char *num_exp, int from_tty)
+show_values (const char *num_exp, int from_tty)
 {
   int i;
   struct value *val;
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index b7ff5cc..dc6dbdd 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -1020,7 +1020,7 @@ display_selector (HANDLE thread, DWORD sel)
 }
 
 static void
-display_selectors (char * args, int from_tty)
+display_selectors (const char * args, int from_tty)
 {
   if (!current_thread)
     {