gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / target-dcache.c

diff --git a/gdb/target-dcache.c b/gdb/target-dcache.c
index 6b7986a4124eb6e27dd94a2353f1c2455e6c3989..0226d6727808810c861af6d5d1d78d5fa65e7fe7 100644 (file)
--- a/gdb/target-dcache.c
+++ b/gdb/target-dcache.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992-2013 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -23,24 +23,16 @@
 /* The target dcache is kept per-address-space.  This key lets us
    associate the cache with the address space.  */
 
-static const struct address_space_data *target_dcache_aspace_key;
-
-/* Clean up dcache, represented by ARG, which is associated with
-   ASPACE.  */
-
-static void
-target_dcache_cleanup (struct address_space *aspace, void *arg)
-{
-  dcache_free (arg);
-}
+static const struct address_space_key<DCACHE, dcache_deleter>
+  target_dcache_aspace_key;
 
 /* Target dcache is initialized or not.  */
 
 int
 target_dcache_init_p (void)
 {
-  DCACHE *dcache = address_space_data (current_program_space->aspace,
-                                      target_dcache_aspace_key);
+  DCACHE *dcache
+    = target_dcache_aspace_key.get (current_program_space->aspace);
 
   return (dcache != NULL);
 }
@@ -50,8 +42,8 @@ target_dcache_init_p (void)
 void
 target_dcache_invalidate (void)
 {
-  DCACHE *dcache = address_space_data (current_program_space->aspace,
-                                      target_dcache_aspace_key);
+  DCACHE *dcache
+    = target_dcache_aspace_key.get (current_program_space->aspace);
 
   if (dcache != NULL)
     dcache_invalidate (dcache);
@@ -63,10 +55,7 @@ target_dcache_invalidate (void)
 DCACHE *
 target_dcache_get (void)
 {
-  DCACHE *dcache = address_space_data (current_program_space->aspace,
-                                      target_dcache_aspace_key);
-
-  return dcache;
+  return target_dcache_aspace_key.get (current_program_space->aspace);
 }
 
 /* Return the target dcache.  If it is not initialized yet, initialize
@@ -75,21 +64,20 @@ target_dcache_get (void)
 DCACHE *
 target_dcache_get_or_init (void)
 {
-  DCACHE *dcache = address_space_data (current_program_space->aspace,
-                                      target_dcache_aspace_key);
+  DCACHE *dcache
+    = target_dcache_aspace_key.get (current_program_space->aspace);
 
   if (dcache == NULL)
     {
       dcache = dcache_init ();
-      set_address_space_data (current_program_space->aspace,
-                             target_dcache_aspace_key, dcache);
+      target_dcache_aspace_key.set (current_program_space->aspace, dcache);
     }
 
   return dcache;
 }
 
 /* The option sets this.  */
-static int stack_cache_enabled_1 = 1;
+static bool stack_cache_enabled_1 = true;
 /* And set_stack_cache updates this.
    The reason for the separation is so that we don't flush the cache for
    on->on transitions.  */
@@ -101,7 +89,7 @@ static int stack_cache_enabled = 1;
    except cleanliness.  */
 
 static void
-set_stack_cache (char *args, int from_tty, struct cmd_list_element *c)
+set_stack_cache (const char *args, int from_tty, struct cmd_list_element *c)
 {
   if (stack_cache_enabled != stack_cache_enabled_1)
     target_dcache_invalidate ();
@@ -124,11 +112,49 @@ stack_cache_enabled_p (void)
   return stack_cache_enabled;
 }
 
-/* -Wmissing-prototypes */
-extern initialize_file_ftype _initialize_target_dcache;
+/* The option sets this.  */
+
+static bool code_cache_enabled_1 = true;
 
+/* And set_code_cache updates this.
+   The reason for the separation is so that we don't flush the cache for
+   on->on transitions.  */
+static int code_cache_enabled = 1;
+
+/* This is called *after* the code-cache has been set.
+   Flush the cache for off->on and on->off transitions.
+   There's no real need to flush the cache for on->off transitions,
+   except cleanliness.  */
+
+static void
+set_code_cache (const char *args, int from_tty, struct cmd_list_element *c)
+{
+  if (code_cache_enabled != code_cache_enabled_1)
+    target_dcache_invalidate ();
+
+  code_cache_enabled = code_cache_enabled_1;
+}
+
+/* Show option "code-cache".  */
+
+static void
+show_code_cache (struct ui_file *file, int from_tty,
+                struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Cache use for code accesses is %s.\n"), value);
+}
+
+/* Return true if "code cache" is enabled, otherwise, return false.  */
+
+int
+code_cache_enabled_p (void)
+{
+  return code_cache_enabled;
+}
+
+void _initialize_target_dcache ();
 void
-_initialize_target_dcache (void)
+_initialize_target_dcache ()
 {
   add_setshow_boolean_cmd ("stack-cache", class_support,
                           &stack_cache_enabled_1, _("\
@@ -141,7 +167,15 @@ By default, caching for stack access is on."),
                           show_stack_cache,
                           &setlist, &showlist);
 
-  target_dcache_aspace_key
-    = register_address_space_data_with_cleanup (NULL,
-                                               target_dcache_cleanup);
+  add_setshow_boolean_cmd ("code-cache", class_support,
+                          &code_cache_enabled_1, _("\
+Set cache use for code segment access."), _("\
+Show cache use for code segment access."), _("\
+When on, use the target memory cache for all code segment accesses,\n\
+regardless of any configured memory regions.  This improves remote\n\
+performance significantly.  By default, caching for code segment\n\
+access is on."),
+                          set_code_cache,
+                          show_code_cache,
+                          &setlist, &showlist);
 }