gdb/solib.h

   1 /* Shared library declarations for GDB, the GNU Debugger.
   2
   3    Copyright (C) 1992-2022 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 /* Called when we free all symtabs, to free the shared library information
  33    as well.  */
  34
  35 extern void clear_solib (void);
  36
  37 /* Called to add symbols from a shared library to gdb's symbol table.  */
  38
  39 extern void solib_add (const char *, int, int);
  40 extern bool solib_read_symbols (struct so_list *, symfile_add_flags);
  41
  42 /* Function to be called when the inferior starts up, to discover the
  43    names of shared libraries that are dynamically linked, the base
  44    addresses to which they are linked, and sufficient information to
  45    read in their symbols at a later time.  */
  46
  47 extern void solib_create_inferior_hook (int from_tty);
  48
  49 /* If ADDR lies in a shared library, return its name.  */
  50
  51 extern char *solib_name_from_address (struct program_space *, CORE_ADDR);
  52
  53 /* Return true if ADDR lies within SOLIB.  */
  54
  55 extern bool solib_contains_address_p (const struct so_list *, CORE_ADDR);
  56
  57 /* Return whether the data starting at VADDR, size SIZE, must be kept
  58    in a core file for shared libraries loaded before "gcore" is used
  59    to be handled correctly when the core file is loaded.  This only
  60    applies when the section would otherwise not be kept in the core
  61    file (in particular, for readonly sections).  */
  62
  63 extern bool solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size);
  64
  65 /* Return true if PC lies in the dynamic symbol resolution code of the
  66    run time loader.  */
  67
  68 extern bool in_solib_dynsym_resolve_code (CORE_ADDR);
  69
  70 /* Discard symbols that were auto-loaded from shared libraries.  */
  71
  72 extern void no_shared_libraries (const char *ignored, int from_tty);
  73
  74 /* Set the solib operations for GDBARCH to NEW_OPS.  */
  75
  76 extern void set_solib_ops (struct gdbarch *gdbarch,
  77                            const struct target_so_ops *new_ops);
  78
  79 /* Synchronize GDB's shared object list with inferior's.
  80
  81    Extract the list of currently loaded shared objects from the
  82    inferior, and compare it with the list of shared objects in the
  83    current program space's list of shared libraries.  Edit
  84    so_list_head to bring it in sync with the inferior's new list.
  85
  86    If we notice that the inferior has unloaded some shared objects,
  87    free any symbolic info GDB had read about those shared objects.
  88
  89    Don't load symbolic info for any new shared objects; just add them
  90    to the list, and leave their symbols_loaded flag clear.
  91
  92    If FROM_TTY is non-null, feel free to print messages about what
  93    we're doing.  */
  94
  95 extern void update_solib_list (int from_tty);
  96
  97 /* Return true if NAME is the libpthread shared library.  */
  98
  99 extern bool libpthread_name_p (const char *name);
 100
 101 /* Look up symbol from both symbol table and dynamic string table.  */
 102
 103 extern CORE_ADDR gdb_bfd_lookup_symbol (bfd *abfd,
 104                                         int (*match_sym) (const asymbol *,
 105                                                           const void *),
 106                                         const void *data);
 107
 108 /* Look up symbol from symbol table.  */
 109
 110 extern CORE_ADDR gdb_bfd_lookup_symbol_from_symtab (bfd *abfd,
 111                                                     int (*match_sym)
 112                                                       (const asymbol *,
 113                                                        const void *),
 114                                                     const void *data);
 115
 116 /* Scan for DESIRED_DYNTAG in .dynamic section of ABFD.  If DESIRED_DYNTAG is
 117    found, 1 is returned and the corresponding PTR and PTR_ADDR are set.  */
 118
 119 extern int gdb_bfd_scan_elf_dyntag (const int desired_dyntag, bfd *abfd,
 120                                     CORE_ADDR *ptr, CORE_ADDR *ptr_addr);
 121
 122 /* If FILENAME refers to an ELF shared object then attempt to return the
 123    string referred to by its DT_SONAME tag.   */
 124
 125 extern gdb::unique_xmalloc_ptr<char> gdb_bfd_read_elf_soname
 126   (const char *filename);
 127
 128 /* Enable or disable optional solib event breakpoints as appropriate.  */
 129
 130 extern void update_solib_breakpoints (void);
 131
 132 /* Handle an solib event by calling solib_add.  */
 133
 134 extern void handle_solib_event (void);
 135
 136 /* Associate SONAME with BUILD_ID in ABFD's registry so that it can be
 137    retrieved with get_cbfd_soname_build_id.  */
 138
 139 extern void set_cbfd_soname_build_id (gdb_bfd_ref_ptr abfd,
 140                                       const char *soname,
 141                                       const bfd_build_id *build_id);
 142
 143 /* If SONAME had a build-id associated with it in ABFD's registry by a
 144    previous call to set_cbfd_soname_build_id then return the build-id
 145    as a NULL-terminated hex string.  */
 146
 147 extern gdb::unique_xmalloc_ptr<char> get_cbfd_soname_build_id
 148   (gdb_bfd_ref_ptr abfd, const char *soname);
 149
 150 #endif /* SOLIB_H */