1 /* Definitions for frame address handler, for GDB, the GNU debugger.
3 Copyright (C) 2003, 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "frame-base.h"
23 #include "gdb_obstack.h"
25 /* A default frame base implementations. If it wasn't for the old
26 DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS,
27 these could be combined into a single function. All architectures
28 really need to override this. */
31 default_frame_base_address (struct frame_info *this_frame, void **this_cache)
33 return get_frame_base (this_frame); /* sigh! */
37 default_frame_locals_address (struct frame_info *this_frame, void **this_cache)
39 return default_frame_base_address (this_frame, this_cache);
43 default_frame_args_address (struct frame_info *this_frame, void **this_cache)
45 return default_frame_base_address (this_frame, this_cache);
48 const struct frame_base default_frame_base = {
49 NULL, /* No parent. */
50 default_frame_base_address,
51 default_frame_locals_address,
52 default_frame_args_address
55 static struct gdbarch_data *frame_base_data;
57 struct frame_base_table_entry
59 frame_base_sniffer_ftype *sniffer;
60 struct frame_base_table_entry *next;
63 struct frame_base_table
65 struct frame_base_table_entry *head;
66 struct frame_base_table_entry **tail;
67 const struct frame_base *default_base;
71 frame_base_init (struct obstack *obstack)
73 struct frame_base_table *table
74 = OBSTACK_ZALLOC (obstack, struct frame_base_table);
75 table->tail = &table->head;
76 table->default_base = &default_frame_base;
81 frame_base_append_sniffer (struct gdbarch *gdbarch,
82 frame_base_sniffer_ftype *sniffer)
84 struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data);
85 (*table->tail) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_base_table_entry);
86 (*table->tail)->sniffer = sniffer;
87 table->tail = &(*table->tail)->next;
91 frame_base_set_default (struct gdbarch *gdbarch,
92 const struct frame_base *default_base)
94 struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data);
95 table->default_base = default_base;
98 const struct frame_base *
99 frame_base_find_by_frame (struct frame_info *this_frame)
101 struct gdbarch *gdbarch = get_frame_arch (this_frame);
102 struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data);
103 struct frame_base_table_entry *entry;
105 for (entry = table->head; entry != NULL; entry = entry->next)
107 const struct frame_base *desc = NULL;
108 desc = entry->sniffer (this_frame);
112 return table->default_base;
115 extern initialize_file_ftype _initialize_frame_base; /* -Wmissing-prototypes */
118 _initialize_frame_base (void)
120 frame_base_data = gdbarch_data_register_pre_init (frame_base_init);