1 /* Shared library declarations for GDB, the GNU Debugger.
2 Copyright (C) 1990-2015 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. */
26 /* Forward declaration for target specific link map information. This
27 struct is opaque to all but the target specific file. */
32 /* The following fields of the structure come directly from the
33 dynamic linker's tables in the inferior, and are initialized by
36 struct so_list *next; /* next structure in linked list */
38 /* A pointer to target specific link map information. Often this
39 will be a copy of struct link_map from the user process, but
40 it need not be; it can be any collection of data needed to
41 traverse the dynamic linker's data structures. */
42 struct lm_info *lm_info;
44 /* Shared object file name, exactly as it appears in the
45 inferior's link map. This may be a relative path, or something
46 which needs to be looked up in LD_LIBRARY_PATH, etc. We use it
47 to tell which entries in the inferior's dynamic linker's link
48 map we've already loaded. */
49 char so_original_name[SO_NAME_MAX_PATH_SIZE];
51 /* Shared object file name, expanded to something GDB can open. */
52 char so_name[SO_NAME_MAX_PATH_SIZE];
54 /* Program space this shared library belongs to. */
55 struct program_space *pspace;
57 /* The following fields of the structure are built from
58 information gathered from the shared object file itself, and
59 are set when we actually add it to our symbol tables.
61 current_sos must initialize these fields to 0. */
64 char symbols_loaded; /* flag: symbols read in yet? */
66 /* objfile with symbols for a loaded library. Target memory is read from
67 ABFD. OBJFILE may be NULL either before symbols have been loaded, if
68 the file cannot be found or after the command "nosharedlibrary". */
69 struct objfile *objfile;
71 struct target_section *sections;
72 struct target_section *sections_end;
74 /* Record the range of addresses belonging to this shared library.
75 There may not be just one (e.g. if two segments are relocated
76 differently); but this is only used for "info sharedlibrary". */
77 CORE_ADDR addr_low, addr_high;
82 /* Adjust the section binding addresses by the base address at
83 which the object was actually mapped. */
84 void (*relocate_section_addresses) (struct so_list *so,
85 struct target_section *);
87 /* Free the link map info and any other private data structures
88 associated with a so_list entry. */
89 void (*free_so) (struct so_list *so);
91 /* Reset private data structures associated with SO.
92 This is called when SO is about to be reloaded.
93 It is also called before free_so when SO is about to be freed. */
94 void (*clear_so) (struct so_list *so);
96 /* Reset or free private data structures not associated with
98 void (*clear_solib) (void);
100 /* Target dependent code to run after child process fork. */
101 void (*solib_create_inferior_hook) (int from_tty);
103 /* Do additional symbol handling, lookup, etc. after symbols for a
104 shared object have been loaded in the usual way. This is
105 called to do any system specific symbol handling that might be
107 void (*special_symbol_handling) (void);
109 /* Construct a list of the currently loaded shared objects. This
110 list does not include an entry for the main executable file.
112 Note that we only gather information directly available from the
113 inferior --- we don't examine any of the shared library files
114 themselves. The declaration of `struct so_list' says which fields
115 we provide values for. */
116 struct so_list *(*current_sos) (void);
118 /* Find, open, and read the symbols for the main executable. If
119 FROM_TTYP dereferences to a non-zero integer, allow messages to
120 be printed. This parameter is a pointer rather than an int
121 because open_symbol_file_object is called via catch_errors and
122 catch_errors requires a pointer argument. */
123 int (*open_symbol_file_object) (void *from_ttyp);
125 /* Determine if PC lies in the dynamic symbol resolution code of
126 the run time loader. */
127 int (*in_dynsym_resolve_code) (CORE_ADDR pc);
129 /* Find and open shared library binary file. */
130 bfd *(*bfd_open) (char *pathname);
132 /* Optional extra hook for finding and opening a solib.
133 If TEMP_PATHNAME is non-NULL: If the file is successfully opened a
134 pointer to a malloc'd and realpath'd copy of SONAME is stored there,
135 otherwise NULL is stored there. */
136 int (*find_and_open_solib) (char *soname,
137 unsigned o_flags, char **temp_pathname);
139 /* Hook for looking up global symbols in a library-specific way. */
140 struct block_symbol (*lookup_lib_global_symbol)
141 (struct objfile *objfile,
143 const domain_enum domain);
145 /* Given two so_list objects, one from the GDB thread list
146 and another from the list returned by current_sos, return 1
147 if they represent the same library.
148 Falls back to using strcmp on so_original_name field when set
150 int (*same) (struct so_list *gdb, struct so_list *inferior);
152 /* Return whether a region of memory must be kept in a core file
153 for shared libraries loaded before "gcore" is used to be
154 handled correctly when the core file is loaded. This only
155 applies when the section would otherwise not be kept in the
156 core file (in particular, for readonly sections). */
157 int (*keep_data_in_core) (CORE_ADDR vaddr,
160 /* Enable or disable optional solib event breakpoints as
161 appropriate. This should be called whenever
162 stop_on_solib_events is changed. This pointer can be
163 NULL, in which case no enabling or disabling is necessary
165 void (*update_breakpoints) (void);
167 /* Target-specific processing of solib events that will be
168 performed before solib_add is called. This pointer can be
169 NULL, in which case no specific preprocessing is necessary
171 void (*handle_event) (void);
174 /* Free the memory associated with a (so_list *). */
175 void free_so (struct so_list *so);
177 /* Return address of first so_list entry in master shared object list. */
178 struct so_list *master_so_list (void);
180 /* Find main executable binary file. */
181 extern char *exec_file_find (char *in_pathname, int *fd);
183 /* Find shared library binary file. */
184 extern char *solib_find (char *in_pathname, int *fd);
186 /* Open BFD for shared library file. */
187 extern bfd *solib_bfd_fopen (char *pathname, int fd);
189 /* Find solib binary file and open it. */
190 extern bfd *solib_bfd_open (char *in_pathname);
192 /* FIXME: gdbarch needs to control this variable. */
193 extern struct target_so_ops *current_target_so_ops;
195 /* Handler for library-specific global symbol lookup in solib.c. */
196 struct block_symbol solib_global_lookup (struct objfile *objfile,
198 const domain_enum domain);