/* 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.
#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. */
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,