1 /* Shared library declarations for GDB, the GNU Debugger.
2 Copyright (C) 1990-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #define SO_NAME_MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */
23 /* For domain_enum domain. */
27 #define ALL_SO_LIBS(so) \
28 for (so = so_list_head; \
32 /* Base class for target-specific link map information. */
40 /* The following fields of the structure come directly from the
41 dynamic linker's tables in the inferior, and are initialized by
44 struct so_list *next; /* next structure in linked list */
46 /* A pointer to target specific link map information. Often this
47 will be a copy of struct link_map from the user process, but
48 it need not be; it can be any collection of data needed to
49 traverse the dynamic linker's data structures. */
50 lm_info_base *lm_info;
52 /* Shared object file name, exactly as it appears in the
53 inferior's link map. This may be a relative path, or something
54 which needs to be looked up in LD_LIBRARY_PATH, etc. We use it
55 to tell which entries in the inferior's dynamic linker's link
56 map we've already loaded. */
57 char so_original_name[SO_NAME_MAX_PATH_SIZE];
59 /* Shared object file name, expanded to something GDB can open. */
60 char so_name[SO_NAME_MAX_PATH_SIZE];
62 /* Program space this shared library belongs to. */
63 struct program_space *pspace;
65 /* The following fields of the structure are built from
66 information gathered from the shared object file itself, and
67 are set when we actually add it to our symbol tables.
69 current_sos must initialize these fields to 0. */
72 char symbols_loaded; /* flag: symbols read in yet? */
74 /* objfile with symbols for a loaded library. Target memory is read from
75 ABFD. OBJFILE may be NULL either before symbols have been loaded, if
76 the file cannot be found or after the command "nosharedlibrary". */
77 struct objfile *objfile;
79 struct target_section *sections;
80 struct target_section *sections_end;
82 /* Record the range of addresses belonging to this shared library.
83 There may not be just one (e.g. if two segments are relocated
84 differently). This is used for "info sharedlibrary" and
85 the MI command "-file-list-shared-libraries". The latter has a format
86 that supports outputting multiple segments once the related code
88 CORE_ADDR addr_low, addr_high;
93 /* Adjust the section binding addresses by the base address at
94 which the object was actually mapped. */
95 void (*relocate_section_addresses) (struct so_list *so,
96 struct target_section *);
98 /* Free the link map info and any other private data structures
99 associated with a so_list entry. */
100 void (*free_so) (struct so_list *so);
102 /* Reset private data structures associated with SO.
103 This is called when SO is about to be reloaded.
104 It is also called before free_so when SO is about to be freed. */
105 void (*clear_so) (struct so_list *so);
107 /* Reset or free private data structures not associated with
109 void (*clear_solib) (void);
111 /* Target dependent code to run after child process fork. */
112 void (*solib_create_inferior_hook) (int from_tty);
114 /* Construct a list of the currently loaded shared objects. This
115 list does not include an entry for the main executable file.
117 Note that we only gather information directly available from the
118 inferior --- we don't examine any of the shared library files
119 themselves. The declaration of `struct so_list' says which fields
120 we provide values for. */
121 struct so_list *(*current_sos) (void);
123 /* Find, open, and read the symbols for the main executable. If
124 FROM_TTY is non-zero, allow messages to be printed. */
125 int (*open_symbol_file_object) (int from_ttyp);
127 /* Determine if PC lies in the dynamic symbol resolution code of
128 the run time loader. */
129 int (*in_dynsym_resolve_code) (CORE_ADDR pc);
131 /* Find and open shared library binary file. */
132 gdb_bfd_ref_ptr (*bfd_open) (char *pathname);
134 /* Optional extra hook for finding and opening a solib.
135 If TEMP_PATHNAME is non-NULL: If the file is successfully opened a
136 pointer to a malloc'd and realpath'd copy of SONAME is stored there,
137 otherwise NULL is stored there. */
138 int (*find_and_open_solib) (const char *soname,
140 gdb::unique_xmalloc_ptr<char> *temp_pathname);
142 /* Hook for looking up global symbols in a library-specific way. */
143 struct block_symbol (*lookup_lib_global_symbol)
144 (struct objfile *objfile,
146 const domain_enum domain);
148 /* Given two so_list objects, one from the GDB thread list
149 and another from the list returned by current_sos, return 1
150 if they represent the same library.
151 Falls back to using strcmp on so_original_name field when set
153 int (*same) (struct so_list *gdb, struct so_list *inferior);
155 /* Return whether a region of memory must be kept in a core file
156 for shared libraries loaded before "gcore" is used to be
157 handled correctly when the core file is loaded. This only
158 applies when the section would otherwise not be kept in the
159 core file (in particular, for readonly sections). */
160 int (*keep_data_in_core) (CORE_ADDR vaddr,
163 /* Enable or disable optional solib event breakpoints as
164 appropriate. This should be called whenever
165 stop_on_solib_events is changed. This pointer can be
166 NULL, in which case no enabling or disabling is necessary
168 void (*update_breakpoints) (void);
170 /* Target-specific processing of solib events that will be
171 performed before solib_add is called. This pointer can be
172 NULL, in which case no specific preprocessing is necessary
174 void (*handle_event) (void);
177 /* Free the memory associated with a (so_list *). */
178 void free_so (struct so_list *so);
180 /* A deleter that calls free_so. */
183 void operator() (struct so_list *so) const
189 /* A unique pointer to a so_list. */
190 typedef std::unique_ptr<so_list, so_deleter> so_list_up;
192 /* Return address of first so_list entry in master shared object list. */
193 struct so_list *master_so_list (void);
195 /* Find main executable binary file. */
196 extern gdb::unique_xmalloc_ptr<char> exec_file_find (const char *in_pathname,
199 /* Find shared library binary file. */
200 extern gdb::unique_xmalloc_ptr<char> solib_find (const char *in_pathname,
203 /* Open BFD for shared library file. */
204 extern gdb_bfd_ref_ptr solib_bfd_fopen (const char *pathname, int fd);
206 /* Find solib binary file and open it. */
207 extern gdb_bfd_ref_ptr solib_bfd_open (char *in_pathname);
209 /* FIXME: gdbarch needs to control this variable. */
210 extern struct target_so_ops *current_target_so_ops;
212 /* Handler for library-specific global symbol lookup in solib.c. */
213 struct block_symbol solib_global_lookup (struct objfile *objfile,
215 const domain_enum domain);