1/* Handle shared libraries for GDB, the GNU Debugger.
2
3   Copyright (C) 2000, 2004, 2006, 2007 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 3 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, see <http://www.gnu.org/licenses/>.  */
19
20#ifndef SOLIB_SVR4_H
21#define SOLIB_SVR4_H
22
23struct objfile;
24struct target_so_ops;
25
26extern struct target_so_ops svr4_so_ops;
27
28/* Critical offsets and sizes which describe struct r_debug and
29   struct link_map on SVR4-like targets.  All offsets and sizes are
30   in bytes unless otherwise specified.  */
31
32struct link_map_offsets
33  {
34    /* Offset and size of r_debug.r_version.  */
35    int r_version_offset, r_version_size;
36
37    /* Offset of r_debug.r_map.  */
38    int r_map_offset;
39
40    /* Offset of r_debug.r_ldsomap.  */
41    int r_ldsomap_offset;
42
43    /* Size of struct link_map (or equivalent), or at least enough of it
44       to be able to obtain the fields below.  */
45    int link_map_size;
46
47    /* Offset to l_addr field in struct link_map.  */
48    int l_addr_offset;
49
50    /* Offset to l_ld field in struct link_map.  */
51    int l_ld_offset;
52
53    /* Offset to l_next field in struct link_map.  */
54    int l_next_offset;
55
56    /* Offset to l_prev field in struct link_map.  */
57    int l_prev_offset;
58
59    /* Offset to l_name field in struct link_map.  */
60    int l_name_offset;
61  };
62
63/* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
64   a <arch>_gdbarch_init() function.  It is used to establish an
65   architecture specific link_map_offsets fetcher for the architecture
66   being defined.  */
67
68extern void set_solib_svr4_fetch_link_map_offsets
69  (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
70
71/* This function is called by thread_db.c.  Return the address of the
72   link map for the given objfile.  */
73extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
74
75/* legacy_svr4_fetch_link_map_offsets_hook is a pointer to a function
76   which is used to fetch link map offsets.  It will only be set
77   by solib-legacy.c, if at all.  */
78extern struct link_map_offsets *(*legacy_svr4_fetch_link_map_offsets_hook) (void);
79
80/* Fetch (and possibly build) an appropriate `struct link_map_offsets'
81   for ILP32 and LP64 SVR4 systems.  */
82extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void);
83extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void);
84
85/* Return 1 if PC lies in the dynamic symbol resolution code of the
86   SVR4 run time loader.  */
87int svr4_in_dynsym_resolve_code (CORE_ADDR pc);
88
89#endif /* solib-svr4.h */
90