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1 | /* Definitions for frame address handler, for GDB, the GNU debugger. |
2 | ||
6aba47ca | 3 | Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc. |
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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 |
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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/>. */ |
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19 | |
20 | #include "defs.h" | |
21 | #include "frame-base.h" | |
22 | #include "frame.h" | |
0cad6aec | 23 | #include "gdb_obstack.h" |
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24 | |
25 | /* A default frame base implementations. If it wasn't for the old | |
42efa47a AC |
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. */ | |
da62e633 AC |
29 | |
30 | static CORE_ADDR | |
31 | default_frame_base_address (struct frame_info *next_frame, void **this_cache) | |
32 | { | |
33 | struct frame_info *this_frame = get_prev_frame (next_frame); | |
34 | return get_frame_base (this_frame); /* sigh! */ | |
35 | } | |
36 | ||
37 | static CORE_ADDR | |
38 | default_frame_locals_address (struct frame_info *next_frame, void **this_cache) | |
39 | { | |
42efa47a | 40 | return default_frame_base_address (next_frame, this_cache); |
da62e633 AC |
41 | } |
42 | ||
43 | static CORE_ADDR | |
44 | default_frame_args_address (struct frame_info *next_frame, void **this_cache) | |
45 | { | |
42efa47a | 46 | return default_frame_base_address (next_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 | ||
56 | static struct gdbarch_data *frame_base_data; | |
57 | ||
0cad6aec AC |
58 | struct frame_base_table_entry |
59 | { | |
60 | frame_base_sniffer_ftype *sniffer; | |
61 | struct frame_base_table_entry *next; | |
62 | }; | |
63 | ||
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64 | struct frame_base_table |
65 | { | |
0cad6aec AC |
66 | struct frame_base_table_entry *head; |
67 | struct frame_base_table_entry **tail; | |
da62e633 | 68 | const struct frame_base *default_base; |
da62e633 AC |
69 | }; |
70 | ||
71 | static void * | |
0cad6aec | 72 | frame_base_init (struct obstack *obstack) |
da62e633 | 73 | { |
0cad6aec AC |
74 | struct frame_base_table *table |
75 | = OBSTACK_ZALLOC (obstack, struct frame_base_table); | |
76 | table->tail = &table->head; | |
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77 | table->default_base = &default_frame_base; |
78 | return table; | |
79 | } | |
80 | ||
e8a89fe2 AC |
81 | void |
82 | frame_base_append_sniffer (struct gdbarch *gdbarch, | |
83 | frame_base_sniffer_ftype *sniffer) | |
84 | { | |
0cad6aec AC |
85 | struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data); |
86 | (*table->tail) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_base_table_entry); | |
87 | (*table->tail)->sniffer = sniffer; | |
88 | table->tail = &(*table->tail)->next; | |
da62e633 AC |
89 | } |
90 | ||
91 | void | |
92 | frame_base_set_default (struct gdbarch *gdbarch, | |
93 | const struct frame_base *default_base) | |
94 | { | |
0cad6aec | 95 | struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data); |
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96 | table->default_base = default_base; |
97 | } | |
98 | ||
99 | const struct frame_base * | |
e8a89fe2 | 100 | frame_base_find_by_frame (struct frame_info *next_frame) |
da62e633 | 101 | { |
e8a89fe2 | 102 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
0cad6aec AC |
103 | struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data); |
104 | struct frame_base_table_entry *entry; | |
105 | ||
106 | for (entry = table->head; entry != NULL; entry = entry->next) | |
da62e633 | 107 | { |
e8a89fe2 | 108 | const struct frame_base *desc = NULL; |
0cad6aec | 109 | desc = entry->sniffer (next_frame); |
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110 | if (desc != NULL) |
111 | return desc; | |
112 | } | |
113 | return table->default_base; | |
114 | } | |
115 | ||
a78f21af | 116 | extern initialize_file_ftype _initialize_frame_base; /* -Wmissing-prototypes */ |
b9362cc7 | 117 | |
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118 | void |
119 | _initialize_frame_base (void) | |
120 | { | |
0cad6aec | 121 | frame_base_data = gdbarch_data_register_pre_init (frame_base_init); |
da62e633 | 122 | } |