]>
Commit | Line | Data |
---|---|---|
494cca16 AC |
1 | /* Definitions for frame unwinder, for GDB, the GNU debugger. |
2 | ||
6aba47ca | 3 | Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc. |
494cca16 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 | |
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 | |
197e01b6 EZ |
19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
494cca16 AC |
21 | |
22 | #include "defs.h" | |
23 | #include "frame.h" | |
24 | #include "frame-unwind.h" | |
25 | #include "gdb_assert.h" | |
26 | #include "dummy-frame.h" | |
41fe5eb3 | 27 | #include "gdb_obstack.h" |
494cca16 AC |
28 | |
29 | static struct gdbarch_data *frame_unwind_data; | |
30 | ||
41fe5eb3 | 31 | struct frame_unwind_table_entry |
494cca16 | 32 | { |
41fe5eb3 | 33 | frame_unwind_sniffer_ftype *sniffer; |
82417da5 | 34 | const struct frame_unwind *unwinder; |
41fe5eb3 | 35 | struct frame_unwind_table_entry *next; |
494cca16 AC |
36 | }; |
37 | ||
41fe5eb3 | 38 | struct frame_unwind_table |
494cca16 | 39 | { |
fb2be677 AC |
40 | struct frame_unwind_table_entry *list; |
41 | /* The head of the OSABI part of the search list. */ | |
42 | struct frame_unwind_table_entry **osabi_head; | |
41fe5eb3 | 43 | }; |
494cca16 AC |
44 | |
45 | static void * | |
41fe5eb3 | 46 | frame_unwind_init (struct obstack *obstack) |
494cca16 | 47 | { |
41fe5eb3 AC |
48 | struct frame_unwind_table *table |
49 | = OBSTACK_ZALLOC (obstack, struct frame_unwind_table); | |
fb2be677 AC |
50 | /* Start the table out with a few default sniffers. OSABI code |
51 | can't override this. */ | |
52 | table->list = OBSTACK_ZALLOC (obstack, struct frame_unwind_table_entry); | |
d67ec5db | 53 | table->list->unwinder = dummy_frame_unwind; |
fb2be677 AC |
54 | /* The insertion point for OSABI sniffers. */ |
55 | table->osabi_head = &table->list->next; | |
494cca16 AC |
56 | return table; |
57 | } | |
58 | ||
e8a89fe2 AC |
59 | void |
60 | frame_unwind_append_sniffer (struct gdbarch *gdbarch, | |
61 | frame_unwind_sniffer_ftype *sniffer) | |
494cca16 | 62 | { |
41fe5eb3 | 63 | struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data); |
fb2be677 AC |
64 | struct frame_unwind_table_entry **ip; |
65 | ||
66 | /* Find the end of the list and insert the new entry there. */ | |
67 | for (ip = table->osabi_head; (*ip) != NULL; ip = &(*ip)->next); | |
68 | (*ip) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry); | |
69 | (*ip)->sniffer = sniffer; | |
e8a89fe2 AC |
70 | } |
71 | ||
82417da5 | 72 | void |
fb2be677 | 73 | frame_unwind_prepend_unwinder (struct gdbarch *gdbarch, |
82417da5 AC |
74 | const struct frame_unwind *unwinder) |
75 | { | |
76 | struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data); | |
fb2be677 AC |
77 | struct frame_unwind_table_entry *entry; |
78 | ||
79 | /* Insert the new entry at the start of the list. */ | |
80 | entry = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry); | |
81 | entry->unwinder = unwinder; | |
82 | entry->next = (*table->osabi_head); | |
83 | (*table->osabi_head) = entry; | |
82417da5 AC |
84 | } |
85 | ||
e8a89fe2 | 86 | const struct frame_unwind * |
82417da5 | 87 | frame_unwind_find_by_frame (struct frame_info *next_frame, void **this_cache) |
e8a89fe2 AC |
88 | { |
89 | int i; | |
90 | struct gdbarch *gdbarch = get_frame_arch (next_frame); | |
91 | struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data); | |
41fe5eb3 | 92 | struct frame_unwind_table_entry *entry; |
fb2be677 | 93 | for (entry = table->list; entry != NULL; entry = entry->next) |
494cca16 | 94 | { |
82417da5 AC |
95 | if (entry->sniffer != NULL) |
96 | { | |
97 | const struct frame_unwind *desc = NULL; | |
98 | desc = entry->sniffer (next_frame); | |
99 | if (desc != NULL) | |
100 | return desc; | |
101 | } | |
102 | if (entry->unwinder != NULL) | |
103 | { | |
104 | if (entry->unwinder->sniffer (entry->unwinder, next_frame, | |
105 | this_cache)) | |
106 | return entry->unwinder; | |
107 | } | |
494cca16 | 108 | } |
e2e0b3e5 | 109 | internal_error (__FILE__, __LINE__, _("frame_unwind_find_by_frame failed")); |
494cca16 AC |
110 | } |
111 | ||
b9362cc7 AC |
112 | extern initialize_file_ftype _initialize_frame_unwind; /* -Wmissing-prototypes */ |
113 | ||
494cca16 AC |
114 | void |
115 | _initialize_frame_unwind (void) | |
116 | { | |
41fe5eb3 | 117 | frame_unwind_data = gdbarch_data_register_pre_init (frame_unwind_init); |
494cca16 | 118 | } |