1/* Shared library declarations for GDB, the GNU Debugger.
2   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
3   2001
4   Free Software Foundation, Inc.
5
6   This file is part of GDB.
7
8   This program is free software; you can redistribute it and/or modify
9   it under the terms of the GNU General Public License as published by
10   the Free Software Foundation; either version 2 of the License, or
11   (at your option) any later version.
12
13   This program is distributed in the hope that it will be useful,
14   but WITHOUT ANY WARRANTY; without even the implied warranty of
15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16   GNU General Public License for more details.
17
18   You should have received a copy of the GNU General Public License
19   along with this program; if not, write to the Free Software
20   Foundation, Inc., 59 Temple Place - Suite 330,
21   Boston, MA 02111-1307, USA.  */
22
23#ifndef SOLIST_H
24#define SOLIST_H
25
26#define SO_NAME_MAX_PATH_SIZE 512	/* FIXME: Should be dynamic */
27
28/* Forward declaration for target specific link map information.  This
29   struct is opaque to all but the target specific file.  */
30struct lm_info;
31
32struct so_list
33  {
34    /* The following fields of the structure come directly from the
35       dynamic linker's tables in the inferior, and are initialized by
36       current_sos.  */
37
38    struct so_list *next;	/* next structure in linked list */
39
40    /* A pointer to target specific link map information.  Often this
41       will be a copy of struct link_map from the user process, but
42       it need not be; it can be any collection of data needed to
43       traverse the dynamic linker's data structures. */
44    struct lm_info *lm_info;
45
46    /* Shared object file name, exactly as it appears in the
47       inferior's link map.  This may be a relative path, or something
48       which needs to be looked up in LD_LIBRARY_PATH, etc.  We use it
49       to tell which entries in the inferior's dynamic linker's link
50       map we've already loaded.  */
51    char so_original_name[SO_NAME_MAX_PATH_SIZE];
52
53    /* shared object file name, expanded to something GDB can open */
54    char so_name[SO_NAME_MAX_PATH_SIZE];
55
56    /* The following fields of the structure are built from
57       information gathered from the shared object file itself, and
58       are set when we actually add it to our symbol tables.
59
60       current_sos must initialize these fields to 0.  */
61
62    bfd *abfd;
63    char symbols_loaded;	/* flag: symbols read in yet? */
64    char from_tty;		/* flag: print msgs? */
65    struct objfile *objfile;	/* objfile for loaded lib */
66    struct section_table *sections;
67    struct section_table *sections_end;
68    struct section_table *textsection;
69  };
70
71struct target_so_ops
72  {
73    /* Adjust the section binding addresses by the base address at
74       which the object was actually mapped.  */
75    void (*relocate_section_addresses) (struct so_list *so,
76                                        struct section_table *);
77
78    /* Free the the link map info and any other private data
79       structures associated with a so_list entry.  */
80    void (*free_so) (struct so_list *so);
81
82    /* Reset or free private data structures not associated with
83       so_list entries.  */
84    void (*clear_solib) (void);
85
86    /* Target dependent code to run after child process fork.  */
87    void (*solib_create_inferior_hook) (void);
88
89    /* Do additional symbol handling, lookup, etc. after symbols
90       for a shared object have been loaded.  */
91    void (*special_symbol_handling) (void);
92
93    /* Construct a list of the currently loaded shared objects.  */
94    struct so_list *(*current_sos) (void);
95
96    /* Find, open, and read the symbols for the main executable.  */
97    int (*open_symbol_file_object) (void *from_ttyp);
98
99    /* Determine if PC lies in the dynamic symbol resolution code of
100       the run time loader */
101    int (*in_dynsym_resolve_code) (CORE_ADDR pc);
102
103    /* Extra hook for finding and opening a solib.  Convenience function
104       for remote debuggers finding host libs */
105    int (*find_and_open_solib) (char *soname,
106        unsigned o_flags, char **temp_pathname);
107
108  };
109
110void free_so (struct so_list *so);
111
112/* Find solib binary file and open it.  */
113extern int solib_open (char *in_pathname, char **found_pathname);
114
115/* FIXME: gdbarch needs to control this variable */
116extern struct target_so_ops *current_target_so_ops;
117
118#define TARGET_SO_RELOCATE_SECTION_ADDRESSES \
119  (current_target_so_ops->relocate_section_addresses)
120#define TARGET_SO_FREE_SO (current_target_so_ops->free_so)
121#define TARGET_SO_CLEAR_SOLIB (current_target_so_ops->clear_solib)
122#define TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK \
123  (current_target_so_ops->solib_create_inferior_hook)
124#define TARGET_SO_SPECIAL_SYMBOL_HANDLING \
125  (current_target_so_ops->special_symbol_handling)
126#define TARGET_SO_CURRENT_SOS (current_target_so_ops->current_sos)
127#define TARGET_SO_OPEN_SYMBOL_FILE_OBJECT \
128  (current_target_so_ops->open_symbol_file_object)
129#define TARGET_SO_IN_DYNSYM_RESOLVE_CODE \
130  (current_target_so_ops->in_dynsym_resolve_code)
131#define TARGET_SO_FIND_AND_OPEN_SOLIB \
132  (current_target_so_ops->find_and_open_solib)
133
134#endif
135