1 /* Shared library declarations for GDB, the GNU Debugger.
2 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
3 2001, 2007, 2008, 2009, 2010 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/>. */
23 #define SO_NAME_MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */
24 /* For domain_enum domain. */
27 /* Forward declaration for target specific link map information. This
28 struct is opaque to all but the target specific file. */
33 /* The following fields of the structure come directly from the
34 dynamic linker's tables in the inferior, and are initialized by
37 struct so_list *next; /* next structure in linked list */
39 /* A pointer to target specific link map information. Often this
40 will be a copy of struct link_map from the user process, but
41 it need not be; it can be any collection of data needed to
42 traverse the dynamic linker's data structures. */
43 struct lm_info *lm_info;
45 /* Shared object file name, exactly as it appears in the
46 inferior's link map. This may be a relative path, or something
47 which needs to be looked up in LD_LIBRARY_PATH, etc. We use it
48 to tell which entries in the inferior's dynamic linker's link
49 map we've already loaded. */
50 char so_original_name[SO_NAME_MAX_PATH_SIZE];
52 /* shared object file name, expanded to something GDB can open */
53 char so_name[SO_NAME_MAX_PATH_SIZE];
55 /* Program space this shared library belongs to. */
56 struct program_space *pspace;
58 /* The following fields of the structure are built from
59 information gathered from the shared object file itself, and
60 are set when we actually add it to our symbol tables.
62 current_sos must initialize these fields to 0. */
65 char symbols_loaded; /* flag: symbols read in yet? */
66 struct objfile *objfile; /* objfile for loaded lib */
67 struct target_section *sections;
68 struct target_section *sections_end;
70 /* Record the range of addresses belonging to this shared library.
71 There may not be just one (e.g. if two segments are relocated
72 differently); but this is only used for "info sharedlibrary". */
73 CORE_ADDR addr_low, addr_high;
78 /* Adjust the section binding addresses by the base address at
79 which the object was actually mapped. */
80 void (*relocate_section_addresses) (struct so_list *so,
81 struct target_section *);
83 /* Free the the link map info and any other private data
84 structures associated with a so_list entry. */
85 void (*free_so) (struct so_list *so);
87 /* Reset or free private data structures not associated with
89 void (*clear_solib) (void);
91 /* Target dependent code to run after child process fork. */
92 void (*solib_create_inferior_hook) (int from_tty);
94 /* Do additional symbol handling, lookup, etc. after symbols
95 for a shared object have been loaded. */
96 void (*special_symbol_handling) (void);
98 /* Construct a list of the currently loaded shared objects. */
99 struct so_list *(*current_sos) (void);
101 /* Find, open, and read the symbols for the main executable. */
102 int (*open_symbol_file_object) (void *from_ttyp);
104 /* Determine if PC lies in the dynamic symbol resolution code of
105 the run time loader */
106 int (*in_dynsym_resolve_code) (CORE_ADDR pc);
108 /* Find and open shared library binary file. */
109 bfd *(*bfd_open) (char *pathname);
111 /* Extra hook for finding and opening a solib.
112 Convenience function for remote debuggers finding host libs. */
113 int (*find_and_open_solib) (char *soname,
114 unsigned o_flags, char **temp_pathname);
116 /* Hook for looking up global symbols in a library-specific way. */
117 struct symbol * (*lookup_lib_global_symbol) (const struct objfile *objfile,
119 const domain_enum domain);
121 /* Given two so_list objects, one from the GDB thread list
122 and another from the list returned by current_sos, return 1
123 if they represent the same library.
124 Falls back to using strcmp on so_original_name field when set
126 int (*same) (struct so_list *gdb, struct so_list *inferior);
128 /* Return whether a region of memory must be kept in a core file
129 for shared libraries loaded before "gcore" is used to be
130 handled correctly when the core file is loaded. This only
131 applies when the section would otherwise not be kept in the
132 core file (in particular, for readonly sections). */
133 int (*keep_data_in_core) (CORE_ADDR vaddr,
137 /* Free the memory associated with a (so_list *). */
138 void free_so (struct so_list *so);
140 /* Return address of first so_list entry in master shared object list. */
141 struct so_list *master_so_list (void);
143 /* Find shared library binary file. */
144 extern char *solib_find (char *in_pathname, int *fd);
146 /* Open BFD for shared library file. */
147 extern bfd *solib_bfd_fopen (char *pathname, int fd);
149 /* Find solib binary file and open it. */
150 extern bfd *solib_bfd_open (char *in_pathname);
152 /* FIXME: gdbarch needs to control this variable */
153 extern struct target_so_ops *current_target_so_ops;
155 /* Handler for library-specific global symbol lookup in solib.c. */
156 struct symbol *solib_global_lookup (const struct objfile *objfile,
158 const domain_enum domain);