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 /* The following fields of the structure are built from 56 information gathered from the shared object file itself, and 57 are set when we actually add it to our symbol tables. 58 59 current_sos must initialize these fields to 0. */ 60 61 bfd *abfd; 62 char symbols_loaded; /* flag: symbols read in yet? */ 63 char from_tty; /* flag: print msgs? */ 64 struct objfile *objfile; /* objfile for loaded lib */ 65 struct target_section *sections; 66 struct target_section *sections_end; 67 68 /* Record the range of addresses belonging to this shared library. 69 There may not be just one (e.g. if two segments are relocated 70 differently); but this is only used for "info sharedlibrary". */ 71 CORE_ADDR addr_low, addr_high; 72 }; 73 74 struct target_so_ops 75 { 76 /* Adjust the section binding addresses by the base address at 77 which the object was actually mapped. */ 78 void (*relocate_section_addresses) (struct so_list *so, 79 struct target_section *); 80 81 /* Free the the link map info and any other private data 82 structures associated with a so_list entry. */ 83 void (*free_so) (struct so_list *so); 84 85 /* Reset or free private data structures not associated with 86 so_list entries. */ 87 void (*clear_solib) (void); 88 89 /* Target dependent code to run after child process fork. */ 90 void (*solib_create_inferior_hook) (void); 91 92 /* Do additional symbol handling, lookup, etc. after symbols 93 for a shared object have been loaded. */ 94 void (*special_symbol_handling) (void); 95 96 /* Construct a list of the currently loaded shared objects. */ 97 struct so_list *(*current_sos) (void); 98 99 /* Find, open, and read the symbols for the main executable. */ 100 int (*open_symbol_file_object) (void *from_ttyp); 101 102 /* Determine if PC lies in the dynamic symbol resolution code of 103 the run time loader */ 104 int (*in_dynsym_resolve_code) (CORE_ADDR pc); 105 106 /* Find and open shared library binary file. */ 107 bfd *(*bfd_open) (char *pathname); 108 109 /* Extra hook for finding and opening a solib. 110 Convenience function for remote debuggers finding host libs. */ 111 int (*find_and_open_solib) (char *soname, 112 unsigned o_flags, char **temp_pathname); 113 114 /* Hook for looking up global symbols in a library-specific way. */ 115 struct symbol * (*lookup_lib_global_symbol) (const struct objfile *objfile, 116 const char *name, 117 const char *linkage_name, 118 const domain_enum domain); 119 120 /* Given two so_list objects, one from the GDB thread list 121 and another from the list returned by current_sos, return 1 122 if they represent the same library. 123 Falls back to using strcmp on so_original_name field when set 124 to NULL. */ 125 int (*same) (struct so_list *gdb, struct so_list *inferior); 126 }; 127 128 /* Free the memory associated with a (so_list *). */ 129 void free_so (struct so_list *so); 130 131 /* Return address of first so_list entry in master shared object list. */ 132 struct so_list *master_so_list (void); 133 134 /* Find shared library binary file. */ 135 extern char *solib_find (char *in_pathname, int *fd); 136 137 /* Open BFD for shared library file. */ 138 extern bfd *solib_bfd_fopen (char *pathname, int fd); 139 140 /* Find solib binary file and open it. */ 141 extern bfd *solib_bfd_open (char *in_pathname); 142 143 /* FIXME: gdbarch needs to control this variable */ 144 extern struct target_so_ops *current_target_so_ops; 145 146 /* Handler for library-specific global symbol lookup in solib.c. */ 147 struct symbol *solib_global_lookup (const struct objfile *objfile, 148 const char *name, 149 const char *linkage_name, 150 const domain_enum domain); 151 152 #endif 153