gdb/solist.h

   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 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   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.
  11
  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.
  16
  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/>.  */
  19
  20 #ifndef SOLIST_H
  21 #define SOLIST_H
  22
  23 #define SO_NAME_MAX_PATH_SIZE 512       /* FIXME: Should be dynamic */
  24 /* For domain_enum domain.  */
  25 #include "symtab.h"
  26
  27 /* Forward declaration for target specific link map information.  This
  28    struct is opaque to all but the target specific file.  */
  29 struct lm_info;
  30
  31 struct so_list
  32   {
  33     /* The following fields of the structure come directly from the
  34        dynamic linker's tables in the inferior, and are initialized by
  35        current_sos.  */
  36
  37     struct so_list *next;       /* next structure in linked list */
  38
  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;
  44
  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];
  51
  52     /* shared object file name, expanded to something GDB can open */
  53     char so_name[SO_NAME_MAX_PATH_SIZE];
  54
  55     /* Program space this shared library belongs to.  */
  56     struct program_space *pspace;
  57
  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.
  61
  62        current_sos must initialize these fields to 0.  */
  63
  64     bfd *abfd;
  65     char symbols_loaded;        /* flag: symbols read in yet? */
  66     char from_tty;              /* flag: print msgs? */
  67     struct objfile *objfile;    /* objfile for loaded lib */
  68     struct target_section *sections;
  69     struct target_section *sections_end;
  70
  71     /* Record the range of addresses belonging to this shared library.
  72        There may not be just one (e.g. if two segments are relocated
  73        differently); but this is only used for "info sharedlibrary".  */
  74     CORE_ADDR addr_low, addr_high;
  75   };
  76
  77 struct target_so_ops
  78   {
  79     /* Adjust the section binding addresses by the base address at
  80        which the object was actually mapped.  */
  81     void (*relocate_section_addresses) (struct so_list *so,
  82                                         struct target_section *);
  83
  84     /* Free the the link map info and any other private data
  85        structures associated with a so_list entry.  */
  86     void (*free_so) (struct so_list *so);
  87
  88     /* Reset or free private data structures not associated with
  89        so_list entries.  */
  90     void (*clear_solib) (void);
  91
  92     /* Target dependent code to run after child process fork.  */
  93     void (*solib_create_inferior_hook) (void);
  94
  95     /* Do additional symbol handling, lookup, etc. after symbols
  96        for a shared object have been loaded.  */
  97     void (*special_symbol_handling) (void);
  98
  99     /* Construct a list of the currently loaded shared objects.  */
 100     struct so_list *(*current_sos) (void);
 101
 102     /* Find, open, and read the symbols for the main executable.  */
 103     int (*open_symbol_file_object) (void *from_ttyp);
 104
 105     /* Determine if PC lies in the dynamic symbol resolution code of
 106        the run time loader */
 107     int (*in_dynsym_resolve_code) (CORE_ADDR pc);
 108
 109     /* Find and open shared library binary file.  */
 110     bfd *(*bfd_open) (char *pathname);
 111
 112     /* Extra hook for finding and opening a solib.
 113        Convenience function for remote debuggers finding host libs.  */
 114     int (*find_and_open_solib) (char *soname,
 115         unsigned o_flags, char **temp_pathname);
 116
 117     /* Hook for looking up global symbols in a library-specific way.  */
 118     struct symbol * (*lookup_lib_global_symbol) (const struct objfile *objfile,
 119                                                  const char *name,
 120                                                  const char *linkage_name,
 121                                                  const domain_enum domain);
 122
 123     /* Given two so_list objects, one from the GDB thread list
 124        and another from the list returned by current_sos, return 1
 125        if they represent the same library.
 126        Falls back to using strcmp on so_original_name field when set
 127        to NULL.  */
 128     int (*same) (struct so_list *gdb, struct so_list *inferior);
 129   };
 130
 131 /* Free the memory associated with a (so_list *).  */
 132 void free_so (struct so_list *so);
 133
 134 /* Return address of first so_list entry in master shared object list.  */
 135 struct so_list *master_so_list (void);
 136
 137 /* Find shared library binary file.  */
 138 extern char *solib_find (char *in_pathname, int *fd);
 139
 140 /* Open BFD for shared library file.  */
 141 extern bfd *solib_bfd_fopen (char *pathname, int fd);
 142
 143 /* Find solib binary file and open it.  */
 144 extern bfd *solib_bfd_open (char *in_pathname);
 145
 146 /* FIXME: gdbarch needs to control this variable */
 147 extern struct target_so_ops *current_target_so_ops;
 148
 149 /* Handler for library-specific global symbol lookup in solib.c.  */
 150 struct symbol *solib_global_lookup (const struct objfile *objfile,
 151                                     const char *name,
 152                                     const char *linkage_name,
 153                                     const domain_enum domain);
 154
 155 #endif