1 /* Provide legacy r_debug and link_map support for SVR4-like native targets.
3 Copyright (C) 2000, 2001, 2006, 2007 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., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, 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_version_offset
= offsetof (struct r_debug
, r_version
);
59 lmo
.r_version_size
= fieldsize (struct r_debug
, r_version
);
60 lmo
.r_map_offset
= offsetof (struct r_debug
, r_map
);
61 lmo
.r_ldsomap_offset
= -1;
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_ld_offset
= offsetof (struct link_map
, l_ld
);
72 lmo
.l_ld_size
= fieldsize (struct link_map
, l_ld
);
74 lmo
.l_prev_offset
= offsetof (struct link_map
, l_prev
);
75 lmo
.l_prev_size
= fieldsize (struct link_map
, l_prev
);
77 lmo
.l_name_offset
= offsetof (struct link_map
, l_name
);
78 lmo
.l_name_size
= fieldsize (struct link_map
, l_name
);
79 #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS) */
80 #ifdef HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS
81 lmo
.link_map_size
= sizeof (struct link_map
);
83 lmo
.l_addr_offset
= offsetof (struct link_map
, lm_addr
);
84 lmo
.l_addr_size
= fieldsize (struct link_map
, lm_addr
);
86 lmo
.l_next_offset
= offsetof (struct link_map
, lm_next
);
87 lmo
.l_next_size
= fieldsize (struct link_map
, lm_next
);
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
);
93 lmo
.l_name_offset
= offsetof (struct link_map
, lm_name
);
94 lmo
.l_name_size
= fieldsize (struct link_map
, lm_name
);
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
);
99 lmo
.l_addr_offset
= offsetof (struct so_map
, som_addr
);
100 lmo
.l_addr_size
= fieldsize (struct so_map
, som_addr
);
102 lmo
.l_next_offset
= offsetof (struct so_map
, som_next
);
103 lmo
.l_next_size
= fieldsize (struct so_map
, som_next
);
105 lmo
.l_name_offset
= offsetof (struct so_map
, som_path
);
106 lmo
.l_name_size
= fieldsize (struct so_map
, som_path
);
108 /* FIXME: Is the address of the dynamic table available? */
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 */
116 #if defined (HAVE_STRUCT_LINK_MAP32)
121 lmo32
.r_version_offset
= offsetof (struct r_debug32
, r_version
);
122 lmo32
.r_version_size
= fieldsize (struct r_debug32
, r_version
);
123 lmo32
.r_map_offset
= offsetof (struct r_debug32
, r_map
);
124 lmo32
.r_ldsomap_offset
= -1;
126 lmo32
.link_map_size
= sizeof (struct link_map32
);
128 lmo32
.l_addr_offset
= offsetof (struct link_map32
, l_addr
);
129 lmo32
.l_addr_size
= fieldsize (struct link_map32
, l_addr
);
131 lmo32
.l_next_offset
= offsetof (struct link_map32
, l_next
);
132 lmo32
.l_next_size
= fieldsize (struct link_map32
, l_next
);
134 lmo32
.l_prev_offset
= offsetof (struct link_map32
, l_prev
);
135 lmo32
.l_prev_size
= fieldsize (struct link_map32
, l_prev
);
137 lmo32
.l_name_offset
= offsetof (struct link_map32
, l_name
);
138 lmo32
.l_name_size
= fieldsize (struct link_map32
, l_name
);
140 #endif /* defined (HAVE_STRUCT_LINK_MAP32) */
142 #if defined (HAVE_STRUCT_LINK_MAP32)
143 if (exec_bfd
!= NULL
)
145 if (bfd_get_arch_size (exec_bfd
) == 32)
148 if (TARGET_PTR_BIT
== 32)
154 #endif /* HAVE_LINK_H */
156 extern initialize_file_ftype _initialize_svr4_lm
; /* -Wmissing-prototypes */
159 _initialize_svr4_lm (void)
162 legacy_svr4_fetch_link_map_offsets_hook
= legacy_svr4_fetch_link_map_offsets
;
163 #endif /* HAVE_LINK_H */