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1 | /* Provide legacy r_debug and link_map support for SVR4-like native targets. |
2 | Copyright 2000, 2001 | |
3 | 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 | #define _SYSCALL32 /* for Sparc64 cross Sparc32 */ | |
23 | #include "defs.h" | |
24 | #include "gdbcore.h" | |
25 | #include "solib-svr4.h" | |
26 | ||
27 | #ifdef HAVE_LINK_H | |
28 | #include <link.h> | |
29 | ||
30 | /* Fetch (and possibly build) an appropriate link_map_offsets structure | |
31 | for native targets using struct definitions from link.h. */ | |
32 | ||
33 | static struct link_map_offsets * | |
34 | legacy_svr4_fetch_link_map_offsets (void) | |
35 | { | |
36 | static struct link_map_offsets lmo; | |
37 | static struct link_map_offsets *lmp = 0; | |
38 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
39 | static struct link_map_offsets lmo32; | |
40 | static struct link_map_offsets *lmp32 = 0; | |
41 | #endif | |
42 | ||
43 | #ifndef offsetof | |
44 | #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) | |
45 | #endif | |
46 | #define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER)) | |
47 | ||
48 | if (lmp == 0) | |
49 | { | |
50 | lmp = &lmo; | |
51 | ||
52 | #ifdef SVR4_SHARED_LIBS | |
53 | lmo.r_debug_size = sizeof (struct r_debug); | |
54 | ||
55 | lmo.r_map_offset = offsetof (struct r_debug, r_map); | |
56 | lmo.r_map_size = fieldsize (struct r_debug, r_map); | |
57 | ||
58 | lmo.link_map_size = sizeof (struct link_map); | |
59 | ||
60 | lmo.l_addr_offset = offsetof (struct link_map, l_addr); | |
61 | lmo.l_addr_size = fieldsize (struct link_map, l_addr); | |
62 | ||
63 | lmo.l_next_offset = offsetof (struct link_map, l_next); | |
64 | lmo.l_next_size = fieldsize (struct link_map, l_next); | |
65 | ||
66 | lmo.l_prev_offset = offsetof (struct link_map, l_prev); | |
67 | lmo.l_prev_size = fieldsize (struct link_map, l_prev); | |
68 | ||
69 | lmo.l_name_offset = offsetof (struct link_map, l_name); | |
70 | lmo.l_name_size = fieldsize (struct link_map, l_name); | |
71 | #else /* !SVR4_SHARED_LIBS */ | |
72 | lmo.link_map_size = sizeof (struct link_map); | |
73 | ||
74 | lmo.l_addr_offset = offsetof (struct link_map, lm_addr); | |
75 | lmo.l_addr_size = fieldsize (struct link_map, lm_addr); | |
76 | ||
77 | lmo.l_next_offset = offsetof (struct link_map, lm_next); | |
78 | lmo.l_next_size = fieldsize (struct link_map, lm_next); | |
79 | ||
80 | lmo.l_name_offset = offsetof (struct link_map, lm_name); | |
81 | lmo.l_name_size = fieldsize (struct link_map, lm_name); | |
82 | #endif /* SVR4_SHARED_LIBS */ | |
83 | } | |
84 | ||
85 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
86 | if (lmp32 == 0) | |
87 | { | |
88 | lmp32 = &lmo32; | |
89 | ||
90 | lmo32.r_debug_size = sizeof (struct r_debug32); | |
91 | ||
92 | lmo32.r_map_offset = offsetof (struct r_debug32, r_map); | |
93 | lmo32.r_map_size = fieldsize (struct r_debug32, r_map); | |
94 | ||
95 | lmo32.link_map_size = sizeof (struct link_map32); | |
96 | ||
97 | lmo32.l_addr_offset = offsetof (struct link_map32, l_addr); | |
98 | lmo32.l_addr_size = fieldsize (struct link_map32, l_addr); | |
99 | ||
100 | lmo32.l_next_offset = offsetof (struct link_map32, l_next); | |
101 | lmo32.l_next_size = fieldsize (struct link_map32, l_next); | |
102 | ||
103 | lmo32.l_prev_offset = offsetof (struct link_map32, l_prev); | |
104 | lmo32.l_prev_size = fieldsize (struct link_map32, l_prev); | |
105 | ||
106 | lmo32.l_name_offset = offsetof (struct link_map32, l_name); | |
107 | lmo32.l_name_size = fieldsize (struct link_map32, l_name); | |
108 | } | |
109 | #endif /* defined (HAVE_STRUCT_LINK_MAP32) */ | |
110 | ||
111 | #if defined (HAVE_STRUCT_LINK_MAP32) | |
112 | if (bfd_get_arch_size (exec_bfd) == 32) | |
113 | return lmp32; | |
114 | else | |
115 | #endif | |
116 | return lmp; | |
117 | } | |
118 | ||
119 | #endif /* HAVE_LINK_H */ | |
120 | ||
121 | void | |
122 | _initialize_svr4_lm (void) | |
123 | { | |
124 | #ifdef HAVE_LINK_H | |
125 | legacy_svr4_fetch_link_map_offsets_hook = legacy_svr4_fetch_link_map_offsets; | |
126 | #endif /* HAVE_LINK_H */ | |
127 | } |