C++ (Cpp) svr4_fetch_objfile_link_map Examples

Example #1

File: ppc-linux-tdep.c Project: Drakey83/steamlink-sdk

/* Hook into inferior_created, solib_loaded, and solib_unloaded observers
   to track whether we've loaded a version of libspe2 (as static or dynamic
   library) that provides the __spe_current_active_context variable.  */
static void
ppc_linux_spe_context_lookup (struct objfile *objfile)
{
  struct bound_minimal_symbol sym;

  if (!objfile)
    {
      spe_context_objfile = NULL;
      spe_context_lm_addr = 0;
      spe_context_offset = 0;
      spe_context_cache_ptid = minus_one_ptid;
      spe_context_cache_address = 0;
      return;
    }

  sym = lookup_minimal_symbol ("__spe_current_active_context", NULL, objfile);
  if (sym.minsym)
    {
      spe_context_objfile = objfile;
      spe_context_lm_addr = svr4_fetch_objfile_link_map (objfile);
      spe_context_offset = BMSYMBOL_VALUE_ADDRESS (sym);
      spe_context_cache_ptid = minus_one_ptid;
      spe_context_cache_address = 0;
      return;
    }
}

Example #2

File: fbsd-threads.c Project: ele7enxxh/dtrace-pf

CORE_ADDR
fbsd_thread_get_local_address(ptid_t ptid, struct objfile *objfile,
                              CORE_ADDR offset)
{
  td_thrhandle_t th;
  void *address;
  CORE_ADDR lm;
  void *lm2;
  int ret, is_library = (objfile->flags & OBJF_SHARED);

  if (IS_THREAD (ptid))
    {
      if (!td_thr_tls_get_addr_p)
        error ("Cannot find thread-local interface in thread_db library.");

      /* Get the address of the link map for this objfile. */
      lm = svr4_fetch_objfile_link_map (objfile);

      /* Couldn't find link map. Bail out. */
      if (!lm)
        {
          if (is_library)
            error ("Cannot find shared library `%s' link_map in dynamic"
                   " linker's module list", objfile->name);
          else
            error ("Cannot find executable file `%s' link_map in dynamic"
                   " linker's module list", objfile->name);
        }

      ret = td_ta_map_id2thr_p (thread_agent, GET_THREAD(ptid), &th);

      /* get the address of the variable. */
      store_typed_address(&lm2, builtin_type_void_data_ptr, lm);
      ret = td_thr_tls_get_addr_p (&th, lm2, offset, &address);

      if (ret != TD_OK)
        {
          if (is_library)
            error ("Cannot find thread-local storage for thread %ld, "
                   "shared library %s:\n%s",
                   (long) GET_THREAD (ptid),
                   objfile->name, thread_db_err_str (ret));
          else
            error ("Cannot find thread-local storage for thread %ld, "
                   "executable file %s:\n%s",
                   (long) GET_THREAD (ptid),
                   objfile->name, thread_db_err_str (ret));
        }

      /* Cast assuming host == target. */
      return extract_typed_address(&address, builtin_type_void_data_ptr);
    }
  return (0);
}