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21479ded | 1 | /* Provide legacy r_debug and link_map support for SVR4-like native targets. |
e4cd0d6a | 2 | |
6aba47ca | 3 | Copyright (C) 2000, 2001, 2006, 2007 Free Software Foundation, Inc. |
21479ded KB |
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. */ | |
21479ded | 21 | |
21479ded KB |
22 | #include "defs.h" |
23 | #include "gdbcore.h" | |
24 | #include "solib-svr4.h" | |
25 | ||
26 | #ifdef HAVE_LINK_H | |
486363b6 KB |
27 | |
28 | #ifdef HAVE_NLIST_H | |
29 | /* nlist.h needs to be included before link.h on some older *BSD systems. */ | |
30 | #include <nlist.h> | |
31 | #endif | |
32 | ||
21479ded KB |
33 | #include <link.h> |
34 | ||
35 | /* Fetch (and possibly build) an appropriate link_map_offsets structure | |
36 | for native targets using struct definitions from link.h. */ | |
37 | ||
38 | static struct link_map_offsets * | |
39 | legacy_svr4_fetch_link_map_offsets (void) | |
40 | { | |
41 | static struct link_map_offsets lmo; | |
42 | static struct link_map_offsets *lmp = 0; | |
43 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
44 | static struct link_map_offsets lmo32; | |
45 | static struct link_map_offsets *lmp32 = 0; | |
46 | #endif | |
47 | ||
48 | #ifndef offsetof | |
49 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
50 | #endif | |
51 | #define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER)) | |
52 | ||
53 | if (lmp == 0) | |
54 | { | |
55 | lmp = &lmo; | |
56 | ||
d45fe813 | 57 | #ifdef HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS |
e4cd0d6a MK |
58 | lmo.r_version_offset = offsetof (struct r_debug, r_version); |
59 | lmo.r_version_size = fieldsize (struct r_debug, r_version); | |
21479ded | 60 | lmo.r_map_offset = offsetof (struct r_debug, r_map); |
e4cd0d6a | 61 | lmo.r_ldsomap_offset = -1; |
21479ded KB |
62 | |
63 | lmo.link_map_size = sizeof (struct link_map); | |
64 | ||
65 | lmo.l_addr_offset = offsetof (struct link_map, l_addr); | |
66 | lmo.l_addr_size = fieldsize (struct link_map, l_addr); | |
67 | ||
68 | lmo.l_next_offset = offsetof (struct link_map, l_next); | |
69 | lmo.l_next_size = fieldsize (struct link_map, l_next); | |
70 | ||
cc10cae3 AO |
71 | lmo.l_ld_offset = offsetof (struct link_map, l_ld); |
72 | lmo.l_ld_size = fieldsize (struct link_map, l_ld); | |
73 | ||
21479ded KB |
74 | lmo.l_prev_offset = offsetof (struct link_map, l_prev); |
75 | lmo.l_prev_size = fieldsize (struct link_map, l_prev); | |
76 | ||
77 | lmo.l_name_offset = offsetof (struct link_map, l_name); | |
78 | lmo.l_name_size = fieldsize (struct link_map, l_name); | |
d45fe813 KB |
79 | #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS) */ |
80 | #ifdef HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS | |
21479ded KB |
81 | lmo.link_map_size = sizeof (struct link_map); |
82 | ||
83 | lmo.l_addr_offset = offsetof (struct link_map, lm_addr); | |
84 | lmo.l_addr_size = fieldsize (struct link_map, lm_addr); | |
85 | ||
86 | lmo.l_next_offset = offsetof (struct link_map, lm_next); | |
87 | lmo.l_next_size = fieldsize (struct link_map, lm_next); | |
88 | ||
cc10cae3 AO |
89 | /* FIXME: Is this the right field name, or is it available at all? */ |
90 | lmo.l_ld_offset = offsetof (struct link_map, lm_ld); | |
91 | lmo.l_ld_size = fieldsize (struct link_map, lm_ld); | |
92 | ||
21479ded KB |
93 | lmo.l_name_offset = offsetof (struct link_map, lm_name); |
94 | lmo.l_name_size = fieldsize (struct link_map, lm_name); | |
d45fe813 KB |
95 | #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS) */ |
96 | #if HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS | |
97 | lmo.link_map_size = sizeof (struct so_map); | |
98 | ||
99 | lmo.l_addr_offset = offsetof (struct so_map, som_addr); | |
100 | lmo.l_addr_size = fieldsize (struct so_map, som_addr); | |
101 | ||
102 | lmo.l_next_offset = offsetof (struct so_map, som_next); | |
103 | lmo.l_next_size = fieldsize (struct so_map, som_next); | |
104 | ||
105 | lmo.l_name_offset = offsetof (struct so_map, som_path); | |
106 | lmo.l_name_size = fieldsize (struct so_map, som_path); | |
cc10cae3 AO |
107 | |
108 | /* FIXME: Is the address of the dynamic table available? */ | |
109 | lmo.l_ld_offset = 0; | |
110 | lmo.l_ld_size = 0; | |
d45fe813 KB |
111 | #endif /* HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS */ |
112 | #endif /* HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS */ | |
113 | #endif /* HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS */ | |
21479ded KB |
114 | } |
115 | ||
116 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
117 | if (lmp32 == 0) | |
118 | { | |
119 | lmp32 = &lmo32; | |
120 | ||
e4cd0d6a MK |
121 | lmo32.r_version_offset = offsetof (struct r_debug32, r_version); |
122 | lmo32.r_version_size = fieldsize (struct r_debug32, r_version); | |
21479ded | 123 | lmo32.r_map_offset = offsetof (struct r_debug32, r_map); |
e4cd0d6a | 124 | lmo32.r_ldsomap_offset = -1; |
21479ded KB |
125 | |
126 | lmo32.link_map_size = sizeof (struct link_map32); | |
127 | ||
128 | lmo32.l_addr_offset = offsetof (struct link_map32, l_addr); | |
129 | lmo32.l_addr_size = fieldsize (struct link_map32, l_addr); | |
130 | ||
131 | lmo32.l_next_offset = offsetof (struct link_map32, l_next); | |
132 | lmo32.l_next_size = fieldsize (struct link_map32, l_next); | |
133 | ||
134 | lmo32.l_prev_offset = offsetof (struct link_map32, l_prev); | |
135 | lmo32.l_prev_size = fieldsize (struct link_map32, l_prev); | |
136 | ||
137 | lmo32.l_name_offset = offsetof (struct link_map32, l_name); | |
138 | lmo32.l_name_size = fieldsize (struct link_map32, l_name); | |
139 | } | |
140 | #endif /* defined (HAVE_STRUCT_LINK_MAP32) */ | |
141 | ||
142 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
d0e1d48e MS |
143 | if (exec_bfd != NULL) |
144 | { | |
145 | if (bfd_get_arch_size (exec_bfd) == 32) | |
146 | return lmp32; | |
147 | } | |
78b29b40 | 148 | if (TARGET_PTR_BIT == 32) |
21479ded | 149 | return lmp32; |
21479ded | 150 | #endif |
78b29b40 | 151 | return lmp; |
21479ded KB |
152 | } |
153 | ||
154 | #endif /* HAVE_LINK_H */ | |
155 | ||
a78f21af AC |
156 | extern initialize_file_ftype _initialize_svr4_lm; /* -Wmissing-prototypes */ |
157 | ||
21479ded KB |
158 | void |
159 | _initialize_svr4_lm (void) | |
160 | { | |
161 | #ifdef HAVE_LINK_H | |
162 | legacy_svr4_fetch_link_map_offsets_hook = legacy_svr4_fetch_link_map_offsets; | |
163 | #endif /* HAVE_LINK_H */ | |
164 | } |