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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 | |
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/>. */ |
21479ded | 19 | |
21479ded KB |
20 | #include "defs.h" |
21 | #include "gdbcore.h" | |
22 | #include "solib-svr4.h" | |
23 | ||
24 | #ifdef HAVE_LINK_H | |
486363b6 KB |
25 | |
26 | #ifdef HAVE_NLIST_H | |
27 | /* nlist.h needs to be included before link.h on some older *BSD systems. */ | |
28 | #include <nlist.h> | |
29 | #endif | |
30 | ||
21479ded KB |
31 | #include <link.h> |
32 | ||
33 | /* Fetch (and possibly build) an appropriate link_map_offsets structure | |
34 | for native targets using struct definitions from link.h. */ | |
35 | ||
36 | static struct link_map_offsets * | |
37 | legacy_svr4_fetch_link_map_offsets (void) | |
38 | { | |
39 | static struct link_map_offsets lmo; | |
40 | static struct link_map_offsets *lmp = 0; | |
41 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
42 | static struct link_map_offsets lmo32; | |
43 | static struct link_map_offsets *lmp32 = 0; | |
44 | #endif | |
45 | ||
46 | #ifndef offsetof | |
47 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
48 | #endif | |
49 | #define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER)) | |
50 | ||
51 | if (lmp == 0) | |
52 | { | |
53 | lmp = &lmo; | |
54 | ||
d45fe813 | 55 | #ifdef HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS |
e4cd0d6a MK |
56 | lmo.r_version_offset = offsetof (struct r_debug, r_version); |
57 | lmo.r_version_size = fieldsize (struct r_debug, r_version); | |
21479ded | 58 | lmo.r_map_offset = offsetof (struct r_debug, r_map); |
e4cd0d6a | 59 | lmo.r_ldsomap_offset = -1; |
21479ded KB |
60 | |
61 | lmo.link_map_size = sizeof (struct link_map); | |
62 | ||
63 | lmo.l_addr_offset = offsetof (struct link_map, l_addr); | |
21479ded | 64 | lmo.l_next_offset = offsetof (struct link_map, l_next); |
cc10cae3 | 65 | lmo.l_ld_offset = offsetof (struct link_map, l_ld); |
21479ded | 66 | lmo.l_prev_offset = offsetof (struct link_map, l_prev); |
21479ded | 67 | lmo.l_name_offset = offsetof (struct link_map, l_name); |
d45fe813 KB |
68 | #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS) */ |
69 | #ifdef HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS | |
21479ded KB |
70 | lmo.link_map_size = sizeof (struct link_map); |
71 | ||
72 | lmo.l_addr_offset = offsetof (struct link_map, lm_addr); | |
21479ded | 73 | lmo.l_next_offset = offsetof (struct link_map, lm_next); |
cc10cae3 AO |
74 | /* FIXME: Is this the right field name, or is it available at all? */ |
75 | lmo.l_ld_offset = offsetof (struct link_map, lm_ld); | |
21479ded | 76 | lmo.l_name_offset = offsetof (struct link_map, lm_name); |
d45fe813 KB |
77 | #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS) */ |
78 | #if HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS | |
79 | lmo.link_map_size = sizeof (struct so_map); | |
80 | ||
81 | lmo.l_addr_offset = offsetof (struct so_map, som_addr); | |
d45fe813 | 82 | lmo.l_next_offset = offsetof (struct so_map, som_next); |
d45fe813 | 83 | lmo.l_name_offset = offsetof (struct so_map, som_path); |
cc10cae3 | 84 | /* FIXME: Is the address of the dynamic table available? */ |
cfaefc65 | 85 | lmo.l_ld_offset = -1; |
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86 | #endif /* HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS */ |
87 | #endif /* HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS */ | |
88 | #endif /* HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS */ | |
21479ded KB |
89 | } |
90 | ||
91 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
92 | if (lmp32 == 0) | |
93 | { | |
94 | lmp32 = &lmo32; | |
95 | ||
e4cd0d6a MK |
96 | lmo32.r_version_offset = offsetof (struct r_debug32, r_version); |
97 | lmo32.r_version_size = fieldsize (struct r_debug32, r_version); | |
21479ded | 98 | lmo32.r_map_offset = offsetof (struct r_debug32, r_map); |
e4cd0d6a | 99 | lmo32.r_ldsomap_offset = -1; |
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100 | |
101 | lmo32.link_map_size = sizeof (struct link_map32); | |
102 | ||
103 | lmo32.l_addr_offset = offsetof (struct link_map32, l_addr); | |
21479ded | 104 | lmo32.l_next_offset = offsetof (struct link_map32, l_next); |
21479ded | 105 | lmo32.l_prev_offset = offsetof (struct link_map32, l_prev); |
21479ded | 106 | lmo32.l_name_offset = offsetof (struct link_map32, l_name); |
21479ded KB |
107 | } |
108 | #endif /* defined (HAVE_STRUCT_LINK_MAP32) */ | |
109 | ||
110 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
d0e1d48e MS |
111 | if (exec_bfd != NULL) |
112 | { | |
113 | if (bfd_get_arch_size (exec_bfd) == 32) | |
114 | return lmp32; | |
115 | } | |
819844ad | 116 | if (gdbarch_ptr_bit (current_gdbarch) == 32) |
21479ded | 117 | return lmp32; |
21479ded | 118 | #endif |
78b29b40 | 119 | return lmp; |
21479ded KB |
120 | } |
121 | ||
122 | #endif /* HAVE_LINK_H */ | |
123 | ||
a78f21af AC |
124 | extern initialize_file_ftype _initialize_svr4_lm; /* -Wmissing-prototypes */ |
125 | ||
21479ded KB |
126 | void |
127 | _initialize_svr4_lm (void) | |
128 | { | |
129 | #ifdef HAVE_LINK_H | |
130 | legacy_svr4_fetch_link_map_offsets_hook = legacy_svr4_fetch_link_map_offsets; | |
131 | #endif /* HAVE_LINK_H */ | |
132 | } |