1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 2000-2017 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/>. */
28 extern struct target_so_ops svr4_so_ops;
30 /* Link map info to include in an allocated so_list entry. */
32 struct lm_info_svr4 : public lm_info_base
34 /* Amount by which addresses in the binary should be relocated to
35 match the inferior. The direct inferior value is L_ADDR_INFERIOR.
36 When prelinking is involved and the prelink base address changes,
37 we may need a different offset - the recomputed offset is in L_ADDR.
38 It is commonly the same value. It is cached as we want to warn about
39 the difference and compute it only once. L_ADDR is valid
41 CORE_ADDR l_addr = 0, l_addr_inferior = 0;
42 bool l_addr_p = false;
44 /* The target location of lm. */
45 CORE_ADDR lm_addr = 0;
47 /* Values read in from inferior's fields of the same name. */
48 CORE_ADDR l_ld = 0, l_next = 0, l_prev = 0, l_name = 0;
51 /* Critical offsets and sizes which describe struct r_debug and
52 struct link_map on SVR4-like targets. All offsets and sizes are
53 in bytes unless otherwise specified. */
55 struct link_map_offsets
57 /* Offset and size of r_debug.r_version. */
58 int r_version_offset, r_version_size;
60 /* Offset of r_debug.r_map. */
63 /* Offset of r_debug.r_brk. */
66 /* Offset of r_debug.r_ldsomap. */
69 /* Size of struct link_map (or equivalent), or at least enough of it
70 to be able to obtain the fields below. */
73 /* Offset to l_addr field in struct link_map. */
76 /* Offset to l_ld field in struct link_map. */
79 /* Offset to l_next field in struct link_map. */
82 /* Offset to l_prev field in struct link_map. */
85 /* Offset to l_name field in struct link_map. */
89 /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
90 a <arch>_gdbarch_init() function. It is used to establish an
91 architecture specific link_map_offsets fetcher for the architecture
94 extern void set_solib_svr4_fetch_link_map_offsets
95 (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
97 /* This function is called by thread_db.c. Return the address of the
98 link map for the given objfile. */
99 extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
101 /* Fetch (and possibly build) an appropriate `struct link_map_offsets'
102 for ILP32 and LP64 SVR4 systems. */
103 extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void);
104 extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void);
106 /* Return 1 if PC lies in the dynamic symbol resolution code of the
107 SVR4 run time loader. */
108 int svr4_in_dynsym_resolve_code (CORE_ADDR pc);
110 #endif /* solib-svr4.h */