1 /* Shared library declarations for GDB, the GNU Debugger. 2 3 Copyright (C) 1992-2023 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 SOLIB_H 21 #define SOLIB_H 22 23 /* Forward decl's for prototypes */ 24 struct so_list; 25 struct target_ops; 26 struct target_so_ops; 27 struct program_space; 28 29 #include "gdb_bfd.h" 30 #include "symfile-add-flags.h" 31 32 /* Value of the 'set debug solib' configuration variable. */ 33 34 extern bool debug_solib; 35 36 /* Print an "solib" debug statement. */ 37 38 #define solib_debug_printf(fmt, ...) \ 39 debug_prefixed_printf_cond (debug_solib, "solib", fmt, ##__VA_ARGS__) 40 41 #define SOLIB_SCOPED_DEBUG_START_END(fmt, ...) \ 42 scoped_debug_start_end (debug_solib, "solib", fmt, ##__VA_ARGS__) 43 44 /* Called when we free all symtabs, to free the shared library information 45 as well. */ 46 47 extern void clear_solib (void); 48 49 /* Called to add symbols from a shared library to gdb's symbol table. */ 50 51 extern void solib_add (const char *, int, int); 52 extern bool solib_read_symbols (struct so_list *, symfile_add_flags); 53 54 /* Function to be called when the inferior starts up, to discover the 55 names of shared libraries that are dynamically linked, the base 56 addresses to which they are linked, and sufficient information to 57 read in their symbols at a later time. */ 58 59 extern void solib_create_inferior_hook (int from_tty); 60 61 /* If ADDR lies in a shared library, return its name. */ 62 63 extern const char *solib_name_from_address (struct program_space *, CORE_ADDR); 64 65 /* Return true if ADDR lies within SOLIB. */ 66 67 extern bool solib_contains_address_p (const struct so_list *, CORE_ADDR); 68 69 /* Return whether the data starting at VADDR, size SIZE, must be kept 70 in a core file for shared libraries loaded before "gcore" is used 71 to be handled correctly when the core file is loaded. This only 72 applies when the section would otherwise not be kept in the core 73 file (in particular, for readonly sections). */ 74 75 extern bool solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size); 76 77 /* Return true if PC lies in the dynamic symbol resolution code of the 78 run time loader. */ 79 80 extern bool in_solib_dynsym_resolve_code (CORE_ADDR); 81 82 /* Discard symbols that were auto-loaded from shared libraries. */ 83 84 extern void no_shared_libraries (const char *ignored, int from_tty); 85 86 /* Synchronize GDB's shared object list with inferior's. 87 88 Extract the list of currently loaded shared objects from the 89 inferior, and compare it with the list of shared objects in the 90 current program space's list of shared libraries. Edit 91 so_list_head to bring it in sync with the inferior's new list. 92 93 If we notice that the inferior has unloaded some shared objects, 94 free any symbolic info GDB had read about those shared objects. 95 96 Don't load symbolic info for any new shared objects; just add them 97 to the list, and leave their symbols_loaded flag clear. 98 99 If FROM_TTY is non-null, feel free to print messages about what 100 we're doing. */ 101 102 extern void update_solib_list (int from_tty); 103 104 /* Return true if NAME is the libpthread shared library. */ 105 106 extern bool libpthread_name_p (const char *name); 107 108 /* Look up symbol from both symbol table and dynamic string table. */ 109 110 extern CORE_ADDR gdb_bfd_lookup_symbol (bfd *abfd, 111 int (*match_sym) (const asymbol *, 112 const void *), 113 const void *data); 114 115 /* Look up symbol from symbol table. */ 116 117 extern CORE_ADDR gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, 118 int (*match_sym) 119 (const asymbol *, 120 const void *), 121 const void *data); 122 123 /* Scan for DESIRED_DYNTAG in .dynamic section of ABFD. If DESIRED_DYNTAG is 124 found, 1 is returned and the corresponding PTR and PTR_ADDR are set. */ 125 126 extern int gdb_bfd_scan_elf_dyntag (const int desired_dyntag, bfd *abfd, 127 CORE_ADDR *ptr, CORE_ADDR *ptr_addr); 128 129 /* If FILENAME refers to an ELF shared object then attempt to return the 130 string referred to by its DT_SONAME tag. */ 131 132 extern gdb::unique_xmalloc_ptr<char> gdb_bfd_read_elf_soname 133 (const char *filename); 134 135 /* Enable or disable optional solib event breakpoints as appropriate. */ 136 137 extern void update_solib_breakpoints (void); 138 139 /* Handle an solib event by calling solib_add. */ 140 141 extern void handle_solib_event (void); 142 143 /* Associate SONAME with BUILD_ID in ABFD's registry so that it can be 144 retrieved with get_cbfd_soname_build_id. */ 145 146 extern void set_cbfd_soname_build_id (gdb_bfd_ref_ptr abfd, 147 const char *soname, 148 const bfd_build_id *build_id); 149 150 /* If SONAME had a build-id associated with it in ABFD's registry by a 151 previous call to set_cbfd_soname_build_id then return the build-id 152 as a NULL-terminated hex string. */ 153 154 extern gdb::unique_xmalloc_ptr<char> get_cbfd_soname_build_id 155 (gdb_bfd_ref_ptr abfd, const char *soname); 156 157 #endif /* SOLIB_H */ 158