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da62e633 AC |
1 | /* Definitions for frame address handler, for GDB, the GNU debugger. |
2 | ||
3 | Copyright 2003 Free Software Foundation, Inc. | |
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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "frame-base.h" | |
24 | #include "frame.h" | |
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 | |
32 | default_frame_base_address (struct frame_info *next_frame, void **this_cache) | |
33 | { | |
34 | struct frame_info *this_frame = get_prev_frame (next_frame); | |
35 | return get_frame_base (this_frame); /* sigh! */ | |
36 | } | |
37 | ||
38 | static CORE_ADDR | |
39 | default_frame_locals_address (struct frame_info *next_frame, void **this_cache) | |
40 | { | |
42efa47a AC |
41 | if (DEPRECATED_FRAME_LOCALS_ADDRESS_P ()) |
42 | { | |
43 | /* This is bad. The computation of per-frame locals address | |
44 | should use a per-frame frame-base. */ | |
45 | struct frame_info *this_frame = get_prev_frame (next_frame); | |
46 | return DEPRECATED_FRAME_LOCALS_ADDRESS (this_frame); | |
47 | } | |
48 | return default_frame_base_address (next_frame, this_cache); | |
da62e633 AC |
49 | } |
50 | ||
51 | static CORE_ADDR | |
52 | default_frame_args_address (struct frame_info *next_frame, void **this_cache) | |
53 | { | |
42efa47a AC |
54 | if (DEPRECATED_FRAME_ARGS_ADDRESS_P ()) |
55 | { | |
56 | struct frame_info *this_frame = get_prev_frame (next_frame); | |
57 | return DEPRECATED_FRAME_ARGS_ADDRESS (this_frame); | |
58 | } | |
59 | return default_frame_base_address (next_frame, this_cache); | |
da62e633 AC |
60 | } |
61 | ||
62 | const struct frame_base default_frame_base = { | |
63 | NULL, /* No parent. */ | |
64 | default_frame_base_address, | |
65 | default_frame_locals_address, | |
66 | default_frame_args_address | |
67 | }; | |
68 | ||
69 | static struct gdbarch_data *frame_base_data; | |
70 | ||
71 | struct frame_base_table | |
72 | { | |
e8a89fe2 | 73 | frame_base_sniffer_ftype **sniffer; |
da62e633 AC |
74 | const struct frame_base *default_base; |
75 | int nr; | |
76 | }; | |
77 | ||
78 | static void * | |
79 | frame_base_init (struct gdbarch *gdbarch) | |
80 | { | |
81 | struct frame_base_table *table = XCALLOC (1, struct frame_base_table); | |
82 | table->default_base = &default_frame_base; | |
83 | return table; | |
84 | } | |
85 | ||
da62e633 AC |
86 | static struct frame_base_table * |
87 | frame_base_table (struct gdbarch *gdbarch) | |
88 | { | |
89 | struct frame_base_table *table = gdbarch_data (gdbarch, frame_base_data); | |
90 | if (table == NULL) | |
91 | { | |
92 | /* ULGH, called during architecture initialization. Patch | |
93 | things up. */ | |
94 | table = frame_base_init (gdbarch); | |
95 | set_gdbarch_data (gdbarch, frame_base_data, table); | |
96 | } | |
97 | return table; | |
98 | } | |
99 | ||
100 | /* Append a predicate to the end of the table. */ | |
101 | static void | |
336d1bba | 102 | append_predicate (struct frame_base_table *table, |
e8a89fe2 | 103 | frame_base_sniffer_ftype *sniffer) |
da62e633 | 104 | { |
e8a89fe2 AC |
105 | table->sniffer = xrealloc (table->sniffer, |
106 | ((table->nr + 1) | |
107 | * sizeof (frame_base_sniffer_ftype *))); | |
e8a89fe2 | 108 | table->sniffer[table->nr] = sniffer; |
da62e633 AC |
109 | table->nr++; |
110 | } | |
111 | ||
e8a89fe2 AC |
112 | void |
113 | frame_base_append_sniffer (struct gdbarch *gdbarch, | |
114 | frame_base_sniffer_ftype *sniffer) | |
115 | { | |
116 | struct frame_base_table *table = frame_base_table (gdbarch); | |
336d1bba | 117 | append_predicate (table, sniffer); |
da62e633 AC |
118 | } |
119 | ||
120 | void | |
121 | frame_base_set_default (struct gdbarch *gdbarch, | |
122 | const struct frame_base *default_base) | |
123 | { | |
124 | struct frame_base_table *table = frame_base_table (gdbarch); | |
125 | table->default_base = default_base; | |
126 | } | |
127 | ||
128 | const struct frame_base * | |
e8a89fe2 | 129 | frame_base_find_by_frame (struct frame_info *next_frame) |
da62e633 | 130 | { |
e8a89fe2 | 131 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
da62e633 | 132 | struct frame_base_table *table = frame_base_table (gdbarch); |
e8a89fe2 | 133 | int i; |
da62e633 AC |
134 | for (i = 0; i < table->nr; i++) |
135 | { | |
e8a89fe2 | 136 | const struct frame_base *desc = NULL; |
336d1bba | 137 | desc = table->sniffer[i] (next_frame); |
da62e633 AC |
138 | if (desc != NULL) |
139 | return desc; | |
140 | } | |
141 | return table->default_base; | |
142 | } | |
143 | ||
a78f21af | 144 | extern initialize_file_ftype _initialize_frame_base; /* -Wmissing-prototypes */ |
b9362cc7 | 145 | |
da62e633 AC |
146 | void |
147 | _initialize_frame_base (void) | |
148 | { | |
fcc1c85c | 149 | frame_base_data = register_gdbarch_data (frame_base_init); |
da62e633 | 150 | } |