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da62e633 AC |
1 | /* Definitions for frame address handler, for GDB, the GNU debugger. |
2 | ||
213516ef | 3 | Copyright (C) 2003-2023 Free Software Foundation, Inc. |
da62e633 AC |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
da62e633 AC |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
da62e633 AC |
19 | |
20 | #include "defs.h" | |
21 | #include "frame-base.h" | |
22 | #include "frame.h" | |
bf31fd38 | 23 | #include "gdbsupport/gdb_obstack.h" |
0d12e84c | 24 | #include "gdbarch.h" |
da62e633 AC |
25 | |
26 | /* A default frame base implementations. If it wasn't for the old | |
42efa47a AC |
27 | DEPRECATED_FRAME_LOCALS_ADDRESS and DEPRECATED_FRAME_ARGS_ADDRESS, |
28 | these could be combined into a single function. All architectures | |
29 | really need to override this. */ | |
da62e633 AC |
30 | |
31 | static CORE_ADDR | |
bd2b40ac | 32 | default_frame_base_address (frame_info_ptr this_frame, void **this_cache) |
da62e633 | 33 | { |
da62e633 AC |
34 | return get_frame_base (this_frame); /* sigh! */ |
35 | } | |
36 | ||
37 | static CORE_ADDR | |
bd2b40ac | 38 | default_frame_locals_address (frame_info_ptr this_frame, void **this_cache) |
da62e633 | 39 | { |
669fac23 | 40 | return default_frame_base_address (this_frame, this_cache); |
da62e633 AC |
41 | } |
42 | ||
43 | static CORE_ADDR | |
bd2b40ac | 44 | default_frame_args_address (frame_info_ptr this_frame, void **this_cache) |
da62e633 | 45 | { |
669fac23 | 46 | return default_frame_base_address (this_frame, this_cache); |
da62e633 AC |
47 | } |
48 | ||
49 | const struct frame_base default_frame_base = { | |
50 | NULL, /* No parent. */ | |
51 | default_frame_base_address, | |
52 | default_frame_locals_address, | |
53 | default_frame_args_address | |
54 | }; | |
55 | ||
0cad6aec AC |
56 | struct frame_base_table_entry |
57 | { | |
58 | frame_base_sniffer_ftype *sniffer; | |
59 | struct frame_base_table_entry *next; | |
60 | }; | |
61 | ||
da62e633 AC |
62 | struct frame_base_table |
63 | { | |
cb275538 TT |
64 | struct frame_base_table_entry *head = nullptr; |
65 | struct frame_base_table_entry **tail = &head; | |
66 | const struct frame_base *default_base = &default_frame_base; | |
da62e633 AC |
67 | }; |
68 | ||
cb275538 | 69 | static const registry<gdbarch>::key<struct frame_base_table> frame_base_data; |
bb9bcb69 | 70 | |
cb275538 TT |
71 | static struct frame_base_table * |
72 | get_frame_base_table (struct gdbarch *gdbarch) | |
73 | { | |
74 | struct frame_base_table *table = frame_base_data.get (gdbarch); | |
75 | if (table == nullptr) | |
76 | table = frame_base_data.emplace (gdbarch); | |
da62e633 AC |
77 | return table; |
78 | } | |
79 | ||
e8a89fe2 AC |
80 | void |
81 | frame_base_append_sniffer (struct gdbarch *gdbarch, | |
82 | frame_base_sniffer_ftype *sniffer) | |
83 | { | |
cb275538 | 84 | struct frame_base_table *table = get_frame_base_table (gdbarch); |
bb9bcb69 | 85 | |
3e43a32a MS |
86 | (*table->tail) |
87 | = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_base_table_entry); | |
0cad6aec AC |
88 | (*table->tail)->sniffer = sniffer; |
89 | table->tail = &(*table->tail)->next; | |
da62e633 AC |
90 | } |
91 | ||
92 | void | |
93 | frame_base_set_default (struct gdbarch *gdbarch, | |
94 | const struct frame_base *default_base) | |
95 | { | |
cb275538 | 96 | struct frame_base_table *table = get_frame_base_table (gdbarch); |
bb9bcb69 | 97 | |
da62e633 AC |
98 | table->default_base = default_base; |
99 | } | |
100 | ||
101 | const struct frame_base * | |
bd2b40ac | 102 | frame_base_find_by_frame (frame_info_ptr this_frame) |
da62e633 | 103 | { |
669fac23 | 104 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
cb275538 | 105 | struct frame_base_table *table = get_frame_base_table (gdbarch); |
0cad6aec AC |
106 | struct frame_base_table_entry *entry; |
107 | ||
108 | for (entry = table->head; entry != NULL; entry = entry->next) | |
da62e633 | 109 | { |
e8a89fe2 | 110 | const struct frame_base *desc = NULL; |
bb9bcb69 | 111 | |
669fac23 | 112 | desc = entry->sniffer (this_frame); |
da62e633 AC |
113 | if (desc != NULL) |
114 | return desc; | |
115 | } | |
116 | return table->default_base; | |
117 | } |