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 3 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, see <http://www.gnu.org/licenses/>. */
22 #include "solib-svr4.h"
27 /* nlist.h needs to be included before link.h on some older *BSD systems. */
33 /* Fetch (and possibly build) an appropriate link_map_offsets structure
34 for native targets using struct definitions from link.h. */
36 static struct link_map_offsets
*
37 legacy_svr4_fetch_link_map_offsets (void)
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;
47 #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
49 #define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER))
55 #ifdef HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS
56 lmo
.r_version_offset
= offsetof (struct r_debug
, r_version
);
57 lmo
.r_version_size
= fieldsize (struct r_debug
, r_version
);
58 lmo
.r_map_offset
= offsetof (struct r_debug
, r_map
);
59 lmo
.r_ldsomap_offset
= -1;
61 lmo
.link_map_size
= sizeof (struct link_map
);
63 lmo
.l_addr_offset
= offsetof (struct link_map
, l_addr
);
64 lmo
.l_next_offset
= offsetof (struct link_map
, l_next
);
65 lmo
.l_ld_offset
= offsetof (struct link_map
, l_ld
);
66 lmo
.l_prev_offset
= offsetof (struct link_map
, l_prev
);
67 lmo
.l_name_offset
= offsetof (struct link_map
, l_name
);
68 #else /* !defined(HAVE_STRUCT_LINK_MAP_WITH_L_MEMBERS) */
69 #ifdef HAVE_STRUCT_LINK_MAP_WITH_LM_MEMBERS
70 lmo
.link_map_size
= sizeof (struct link_map
);
72 lmo
.l_addr_offset
= offsetof (struct link_map
, lm_addr
);
73 lmo
.l_next_offset
= offsetof (struct link_map
, lm_next
);
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
);
76 lmo
.l_name_offset
= offsetof (struct link_map
, lm_name
);
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
);
81 lmo
.l_addr_offset
= offsetof (struct so_map
, som_addr
);
82 lmo
.l_next_offset
= offsetof (struct so_map
, som_next
);
83 lmo
.l_name_offset
= offsetof (struct so_map
, som_path
);
84 /* FIXME: Is the address of the dynamic table available? */
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 */
91 #if defined (HAVE_STRUCT_LINK_MAP32)
96 lmo32
.r_version_offset
= offsetof (struct r_debug32
, r_version
);
97 lmo32
.r_version_size
= fieldsize (struct r_debug32
, r_version
);
98 lmo32
.r_map_offset
= offsetof (struct r_debug32
, r_map
);
99 lmo32
.r_ldsomap_offset
= -1;
101 lmo32
.link_map_size
= sizeof (struct link_map32
);
103 lmo32
.l_addr_offset
= offsetof (struct link_map32
, l_addr
);
104 lmo32
.l_next_offset
= offsetof (struct link_map32
, l_next
);
105 lmo32
.l_prev_offset
= offsetof (struct link_map32
, l_prev
);
106 lmo32
.l_name_offset
= offsetof (struct link_map32
, l_name
);
108 #endif /* defined (HAVE_STRUCT_LINK_MAP32) */
110 #if defined (HAVE_STRUCT_LINK_MAP32)
111 if (exec_bfd
!= NULL
)
113 if (bfd_get_arch_size (exec_bfd
) == 32)
116 if (gdbarch_ptr_bit (current_gdbarch
) == 32)
122 #endif /* HAVE_LINK_H */
124 extern initialize_file_ftype _initialize_svr4_lm
; /* -Wmissing-prototypes */
127 _initialize_svr4_lm (void)
130 legacy_svr4_fetch_link_map_offsets_hook
= legacy_svr4_fetch_link_map_offsets
;
131 #endif /* HAVE_LINK_H */