reggroups: Convert reggroups from post_init to pre_init

Currently the reggroups gdbarch_data cannot be manipulated until after
the gdbarch is completely initialized.  This is usually done when the
object init depends on architecture specific fields.  In the case of
reggroups it only depends on the obstack being available.

Coverting this to pre_init allows using reggroups during gdbarch
initialization.  This is needed to allow registering arbitrary reggroups
during gdbarch initializations.

gdb/ChangeLog:

yyyy-mm-dd  Stafford Horne  <shorne@gmail.com>

	* reggroups.c (reggroups_init): Change to depend only on
	obstack rather than gdbarch.
	(reggroup_add): Remove logic for forcing premature init.
	(_initialize_reggroup): Set `reggroups_data` with
	gdbarch_data_register_pre_init() rather than
	gdbarch_data_register_post_init().

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1e753cd3f7029fe075f843c3f5560c1ccd37668c..79f5357d5481c5bd47e2d1bca9a601a32da721b9 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+2017-12-27  Stafford Horne  <shorne@gmail.com>
+
+       * reggroups.c (reggroups_init): Change to depend only on
+       obstack rather than gdbarch.
+       (reggroup_add): Remove logic for forcing premature init.
+       (_initialize_reggroup): Set `reggroups_data` with
+       gdbarch_data_register_pre_init() rather than
+       gdbarch_data_register_post_init().
+
 2017-12-27  Stafford Horne  <shorne@gmail.com>
 
        * infcmd.c (_initialize_infcmd): Add help for info reg $reggroup

diff --git a/gdb/reggroups.c b/gdb/reggroups.c
index 2ecd0b494f7086eb98fcdb921157b669f2ff779a..5d5e33f2a3574db3ec553f5bbf1b48cdc9734be0 100644 (file)
--- a/gdb/reggroups.c
+++ b/gdb/reggroups.c
@@ -26,6 +26,7 @@
 #include "regcache.h"
 #include "command.h"
 #include "gdbcmd.h"            /* For maintenanceprintlist.  */
+#include "gdb_obstack.h"
 
 /* Individual register groups.  */
 
@@ -76,10 +77,9 @@ struct reggroups
 static struct gdbarch_data *reggroups_data;
 
 static void *
-reggroups_init (struct gdbarch *gdbarch)
+reggroups_init (struct obstack *obstack)
 {
-  struct reggroups *groups = GDBARCH_OBSTACK_ZALLOC (gdbarch,
-                                                    struct reggroups);
+  struct reggroups *groups = OBSTACK_ZALLOC (obstack, struct reggroups);
 
   groups->last = &groups->first;
   return groups;
@@ -105,13 +105,6 @@ reggroup_add (struct gdbarch *gdbarch, struct reggroup *group)
   struct reggroups *groups
     = (struct reggroups *) gdbarch_data (gdbarch, reggroups_data);
 
-  if (groups == NULL)
-    {
-      /* ULGH, called during architecture initialization.  Patch
-         things up.  */
-      groups = (struct reggroups *) reggroups_init (gdbarch);
-      deprecated_set_gdbarch_data (gdbarch, reggroups_data, groups);
-    }
   add_group (groups, group,
             GDBARCH_OBSTACK_ZALLOC (gdbarch, struct reggroup_el));
 }
@@ -298,7 +291,7 @@ struct reggroup *const restore_reggroup = &restore_group;
 void
 _initialize_reggroup (void)
 {
-  reggroups_data = gdbarch_data_register_post_init (reggroups_init);
+  reggroups_data = gdbarch_data_register_pre_init (reggroups_init);
 
   /* The pre-defined list of groups.  */
   add_group (&default_groups, general_reggroup, XNEW (struct reggroup_el));