1 /* Provide legacy r_debug and link_map support for SVR4-like native targets.
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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. */
24 #include "solib-svr4.h"
29 /* nlist.h needs to be included before link.h on some older *BSD systems. */
35 /* Fetch (and possibly build) an appropriate link_map_offsets structure
36 for native targets using struct definitions from link.h. */
38 static struct link_map_offsets *
39 legacy_svr4_fetch_link_map_offsets (void)
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;
49 #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
51 #define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER))
57 #ifdef HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS
58 lmo.r_debug_size = sizeof (struct r_debug);
60 lmo.r_map_offset = offsetof (struct r_debug, r_map);
61 lmo.r_map_size = fieldsize (struct r_debug, r_map);
63 lmo.link_map_size = sizeof (struct link_map);
65 lmo.l_addr_offset = offsetof (struct link_map, l_addr);
66 lmo.l_addr_size = fieldsize (struct link_map, l_addr);
68 lmo.l_next_offset = offsetof (struct link_map, l_next);
69 lmo.l_next_size = fieldsize (struct link_map, l_next);
71 lmo.l_prev_offset = offsetof (struct link_map, l_prev);
72 lmo.l_prev_size = fieldsize (struct link_map, l_prev);
74 lmo.l_name_offset = offsetof (struct link_map, l_name);
75 lmo.l_name_size = fieldsize (struct link_map, l_name);
76 #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS) */
77 #ifdef HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS
78 lmo.link_map_size = sizeof (struct link_map);
80 lmo.l_addr_offset = offsetof (struct link_map, lm_addr);
81 lmo.l_addr_size = fieldsize (struct link_map, lm_addr);
83 lmo.l_next_offset = offsetof (struct link_map, lm_next);
84 lmo.l_next_size = fieldsize (struct link_map, lm_next);
86 lmo.l_name_offset = offsetof (struct link_map, lm_name);
87 lmo.l_name_size = fieldsize (struct link_map, lm_name);
88 #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS) */
89 #if HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS
90 lmo.link_map_size = sizeof (struct so_map);
92 lmo.l_addr_offset = offsetof (struct so_map, som_addr);
93 lmo.l_addr_size = fieldsize (struct so_map, som_addr);
95 lmo.l_next_offset = offsetof (struct so_map, som_next);
96 lmo.l_next_size = fieldsize (struct so_map, som_next);
98 lmo.l_name_offset = offsetof (struct so_map, som_path);
99 lmo.l_name_size = fieldsize (struct so_map, som_path);
100 #endif /* HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS */
101 #endif /* HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS */
102 #endif /* HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS */
105 #if defined (HAVE_STRUCT_LINK_MAP32)
110 lmo32.r_debug_size = sizeof (struct r_debug32);
112 lmo32.r_map_offset = offsetof (struct r_debug32, r_map);
113 lmo32.r_map_size = fieldsize (struct r_debug32, r_map);
115 lmo32.link_map_size = sizeof (struct link_map32);
117 lmo32.l_addr_offset = offsetof (struct link_map32, l_addr);
118 lmo32.l_addr_size = fieldsize (struct link_map32, l_addr);
120 lmo32.l_next_offset = offsetof (struct link_map32, l_next);
121 lmo32.l_next_size = fieldsize (struct link_map32, l_next);
123 lmo32.l_prev_offset = offsetof (struct link_map32, l_prev);
124 lmo32.l_prev_size = fieldsize (struct link_map32, l_prev);
126 lmo32.l_name_offset = offsetof (struct link_map32, l_name);
127 lmo32.l_name_size = fieldsize (struct link_map32, l_name);
129 #endif /* defined (HAVE_STRUCT_LINK_MAP32) */
131 #if defined (HAVE_STRUCT_LINK_MAP32)
132 if (exec_bfd != NULL)
134 if (bfd_get_arch_size (exec_bfd) == 32)
137 if (TARGET_PTR_BIT == 32)
143 #endif /* HAVE_LINK_H */
145 extern initialize_file_ftype _initialize_svr4_lm; /* -Wmissing-prototypes */
148 _initialize_svr4_lm (void)
151 legacy_svr4_fetch_link_map_offsets_hook = legacy_svr4_fetch_link_map_offsets;
152 #endif /* HAVE_LINK_H */