Disable displaced stepping if trying it fails

[deliverable/binutils-gdb.git] / gdb / reggroups.c

diff --git a/gdb/reggroups.c b/gdb/reggroups.c
index 94f2a4810f4e388a509dfe7dbe40cb07a65f7938..745c5ea5de89e713ad00a43be7e449dbc337a4c1 100644 (file)
--- a/gdb/reggroups.c
+++ b/gdb/reggroups.c
@@ -1,6 +1,6 @@
 /* Register groupings for GDB, the GNU debugger.
 
-   Copyright (C) 2002-2014 Free Software Foundation, Inc.
+   Copyright (C) 2002-2015 Free Software Foundation, Inc.
 
    Contributed by Red Hat.
 
@@ -23,7 +23,6 @@
 #include "arch-utils.h"
 #include "reggroups.h"
 #include "gdbtypes.h"
-#include "gdb_assert.h"
 #include "regcache.h"
 #include "command.h"
 #include "gdbcmd.h"            /* For maintenanceprintlist.  */
@@ -39,7 +38,7 @@ struct reggroup
 struct reggroup *
 reggroup_new (const char *name, enum reggroup_type type)
 {
-  struct reggroup *group = XMALLOC (struct reggroup);
+  struct reggroup *group = XNEW (struct reggroup);
 
   group->name = name;
   group->type = type;
@@ -151,6 +150,35 @@ reggroup_next (struct gdbarch *gdbarch, struct reggroup *last)
   return NULL;
 }
 
+/* See reggroups.h.  */
+
+struct reggroup *
+reggroup_prev (struct gdbarch *gdbarch, struct reggroup *curr)
+{
+  struct reggroups *groups;
+  struct reggroup_el *el;
+  struct reggroup *prev;
+
+  /* Don't allow this function to be called during architecture
+     creation.  If there are no groups, use the default groups list.  */
+  groups = gdbarch_data (gdbarch, reggroups_data);
+  gdb_assert (groups != NULL);
+  if (groups->first == NULL)
+    groups = &default_groups;
+
+  prev = NULL;
+  for (el = groups->first; el != NULL; el = el->next)
+    {
+      gdb_assert (el->group != NULL);
+      if (el->group == curr)
+       return prev;
+      prev = el->group;
+    }
+  if (curr == NULL)
+    return prev;
+  return NULL;
+}
+
 /* Is REGNUM a member of REGGROUP?  */
 int
 default_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
@@ -277,13 +305,13 @@ _initialize_reggroup (void)
   reggroups_data = gdbarch_data_register_post_init (reggroups_init);
 
   /* The pre-defined list of groups.  */
-  add_group (&default_groups, general_reggroup, XMALLOC (struct reggroup_el));
-  add_group (&default_groups, float_reggroup, XMALLOC (struct reggroup_el));
-  add_group (&default_groups, system_reggroup, XMALLOC (struct reggroup_el));
-  add_group (&default_groups, vector_reggroup, XMALLOC (struct reggroup_el));
-  add_group (&default_groups, all_reggroup, XMALLOC (struct reggroup_el));
-  add_group (&default_groups, save_reggroup, XMALLOC (struct reggroup_el));
-  add_group (&default_groups, restore_reggroup, XMALLOC (struct reggroup_el));
+  add_group (&default_groups, general_reggroup, XNEW (struct reggroup_el));
+  add_group (&default_groups, float_reggroup, XNEW (struct reggroup_el));
+  add_group (&default_groups, system_reggroup, XNEW (struct reggroup_el));
+  add_group (&default_groups, vector_reggroup, XNEW (struct reggroup_el));
+  add_group (&default_groups, all_reggroup, XNEW (struct reggroup_el));
+  add_group (&default_groups, save_reggroup, XNEW (struct reggroup_el));
+  add_group (&default_groups, restore_reggroup, XNEW (struct reggroup_el));
 
   add_cmd ("reggroups", class_maintenance,
           maintenance_print_reggroups, _("\