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, 2011 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 67 /* objfile with symbols for a loaded library. Target memory is read from 68 ABFD. OBJFILE may be NULL either before symbols have been loaded, if 69 the file cannot be found or after the command "nosharedlibrary". */ 70 struct objfile *objfile; 71 72 struct target_section *sections; 73 struct target_section *sections_end; 74 75 /* Record the range of addresses belonging to this shared library. 76 There may not be just one (e.g. if two segments are relocated 77 differently); but this is only used for "info sharedlibrary". */ 78 CORE_ADDR addr_low, addr_high; 79 }; 80 81 struct target_so_ops 82 { 83 /* Adjust the section binding addresses by the base address at 84 which the object was actually mapped. */ 85 void (*relocate_section_addresses) (struct so_list *so, 86 struct target_section *); 87 88 /* Free the link map info and any other private data structures 89 associated with a so_list entry. */ 90 void (*free_so) (struct so_list *so); 91 92 /* Reset or free private data structures not associated with 93 so_list entries. */ 94 void (*clear_solib) (void); 95 96 /* Target dependent code to run after child process fork. */ 97 void (*solib_create_inferior_hook) (int from_tty); 98 99 /* Do additional symbol handling, lookup, etc. after symbols 100 for a shared object have been loaded. */ 101 void (*special_symbol_handling) (void); 102 103 /* Construct a list of the currently loaded shared objects. */ 104 struct so_list *(*current_sos) (void); 105 106 /* Find, open, and read the symbols for the main executable. */ 107 int (*open_symbol_file_object) (void *from_ttyp); 108 109 /* Determine if PC lies in the dynamic symbol resolution code of 110 the run time loader. */ 111 int (*in_dynsym_resolve_code) (CORE_ADDR pc); 112 113 /* Find and open shared library binary file. */ 114 bfd *(*bfd_open) (char *pathname); 115 116 /* Extra hook for finding and opening a solib. 117 Convenience function for remote debuggers finding host libs. */ 118 int (*find_and_open_solib) (char *soname, 119 unsigned o_flags, char **temp_pathname); 120 121 /* Hook for looking up global symbols in a library-specific way. */ 122 struct symbol * (*lookup_lib_global_symbol) (const struct objfile *objfile, 123 const char *name, 124 const domain_enum domain); 125 126 /* Given two so_list objects, one from the GDB thread list 127 and another from the list returned by current_sos, return 1 128 if they represent the same library. 129 Falls back to using strcmp on so_original_name field when set 130 to NULL. */ 131 int (*same) (struct so_list *gdb, struct so_list *inferior); 132 133 /* Return whether a region of memory must be kept in a core file 134 for shared libraries loaded before "gcore" is used to be 135 handled correctly when the core file is loaded. This only 136 applies when the section would otherwise not be kept in the 137 core file (in particular, for readonly sections). */ 138 int (*keep_data_in_core) (CORE_ADDR vaddr, 139 unsigned long size); 140 }; 141 142 /* Free the memory associated with a (so_list *). */ 143 void free_so (struct so_list *so); 144 145 /* Return address of first so_list entry in master shared object list. */ 146 struct so_list *master_so_list (void); 147 148 /* Find shared library binary file. */ 149 extern char *solib_find (char *in_pathname, int *fd); 150 151 /* Open BFD for shared library file. */ 152 extern bfd *solib_bfd_fopen (char *pathname, int fd); 153 154 /* Find solib binary file and open it. */ 155 extern bfd *solib_bfd_open (char *in_pathname); 156 157 /* FIXME: gdbarch needs to control this variable. */ 158 extern struct target_so_ops *current_target_so_ops; 159 160 /* Handler for library-specific global symbol lookup in solib.c. */ 161 struct symbol *solib_global_lookup (const struct objfile *objfile, 162 const char *name, 163 const domain_enum domain); 164 165 #endif 166