1 /* Definitions for frame address handler, for GDB, the GNU debugger.
3 Copyright (C) 2003-2019 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/>. */
22 /* Local non-gdb includes. */
23 #include "frame-base.h"
25 #include "gdb_obstack.h"
27 /* A default frame base implementations. If it wasn't for the old
28 DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS,
29 these could be combined into a single function. All architectures
30 really need to override this. */
33 default_frame_base_address (struct frame_info *this_frame, void **this_cache)
35 return get_frame_base (this_frame); /* sigh! */
39 default_frame_locals_address (struct frame_info *this_frame, void **this_cache)
41 return default_frame_base_address (this_frame, this_cache);
45 default_frame_args_address (struct frame_info *this_frame, void **this_cache)
47 return default_frame_base_address (this_frame, this_cache);
50 const struct frame_base default_frame_base = {
51 NULL, /* No parent. */
52 default_frame_base_address,
53 default_frame_locals_address,
54 default_frame_args_address
57 static struct gdbarch_data *frame_base_data;
59 struct frame_base_table_entry
61 frame_base_sniffer_ftype *sniffer;
62 struct frame_base_table_entry *next;
65 struct frame_base_table
67 struct frame_base_table_entry *head;
68 struct frame_base_table_entry **tail;
69 const struct frame_base *default_base;
73 frame_base_init (struct obstack *obstack)
75 struct frame_base_table *table
76 = OBSTACK_ZALLOC (obstack, struct frame_base_table);
78 table->tail = &table->head;
79 table->default_base = &default_frame_base;
84 frame_base_append_sniffer (struct gdbarch *gdbarch,
85 frame_base_sniffer_ftype *sniffer)
87 struct frame_base_table *table
88 = (struct frame_base_table *) gdbarch_data (gdbarch, frame_base_data);
91 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_base_table_entry);
92 (*table->tail)->sniffer = sniffer;
93 table->tail = &(*table->tail)->next;
97 frame_base_set_default (struct gdbarch *gdbarch,
98 const struct frame_base *default_base)
100 struct frame_base_table *table
101 = (struct frame_base_table *) gdbarch_data (gdbarch, frame_base_data);
103 table->default_base = default_base;
106 const struct frame_base *
107 frame_base_find_by_frame (struct frame_info *this_frame)
109 struct gdbarch *gdbarch = get_frame_arch (this_frame);
110 struct frame_base_table *table
111 = (struct frame_base_table *) gdbarch_data (gdbarch, frame_base_data);
112 struct frame_base_table_entry *entry;
114 for (entry = table->head; entry != NULL; entry = entry->next)
116 const struct frame_base *desc = NULL;
118 desc = entry->sniffer (this_frame);
122 return table->default_base;
126 _initialize_frame_base (void)
128 frame_base_data = gdbarch_data_register_pre_init (frame_base_init);