Example #1
0
/*! \brief Exports the keymap in scheme to a GLib GArray.
 *  \par Function Description
 *  This function converts the list of key sequence/action pairs
 *  returned by the scheme function \c dump-current-keymap into an
 *  array of C structures.
 *
 *  The returned value must be freed by caller.
 *
 *  \return A GArray with keymap data.
  */
GArray*
g_keys_dump_keymap (void)
{
  SCM dump_proc = scm_c_lookup ("dump-current-keymap");
  SCM scm_ret;
  GArray *ret = NULL;
  struct keyseq_action_t {
    gchar *keyseq, *action;
  };

  dump_proc = scm_variable_ref (dump_proc);
  g_return_val_if_fail (SCM_NFALSEP (scm_procedure_p (dump_proc)), NULL);

  scm_ret = scm_call_0 (dump_proc);
  g_return_val_if_fail (SCM_CONSP (scm_ret), NULL);

  ret = g_array_sized_new (FALSE,
                           FALSE,
                           sizeof (struct keyseq_action_t),
                           (guint)scm_ilength (scm_ret));
  for (; scm_ret != SCM_EOL; scm_ret = SCM_CDR (scm_ret)) {
    SCM scm_keymap_entry = SCM_CAR (scm_ret);
    struct keyseq_action_t keymap_entry;

    g_return_val_if_fail (SCM_CONSP (scm_keymap_entry) &&
                          scm_is_symbol (SCM_CAR (scm_keymap_entry)) &&
                          scm_is_string (SCM_CDR (scm_keymap_entry)), ret);
    keymap_entry.action = g_strdup (SCM_SYMBOL_CHARS (SCM_CAR (scm_keymap_entry)));
    keymap_entry.keyseq = g_strdup (SCM_STRING_CHARS (SCM_CDR (scm_keymap_entry)));
    ret = g_array_append_val (ret, keymap_entry);
  }

  return ret;
}
Example #2
0
/* places a single char in the input buffer.  */
static int 
sf_fill_input (SCM port)
{
  SCM p = SCM_PACK (SCM_STREAM (port));
  SCM ans;
  scm_t_port *pt;

  ans = scm_call_0 (SCM_SIMPLE_VECTOR_REF (p, 3)); /* get char.  */
  if (scm_is_false (ans) || SCM_EOF_OBJECT_P (ans))
    return EOF;
  SCM_ASSERT (SCM_CHARP (ans), ans, SCM_ARG1, "sf_fill_input");
  pt = SCM_PTAB_ENTRY (port);    

  if (pt->encoding == NULL)
    {
      scm_t_port *pt = SCM_PTAB_ENTRY (port);    
      
      *pt->read_buf = SCM_CHAR (ans);
      pt->read_pos = pt->read_buf;
      pt->read_end = pt->read_buf + 1;
      return *pt->read_buf;
    }
  else
    scm_ungetc_unlocked (SCM_CHAR (ans), port);
  return SCM_CHAR (ans);
}
Example #3
0
static SCM
game_run (SCM game_smob)
{
    Game *game = check_game (game_smob);

    if (scm_is_true (game->on_start)) {
	scm_call_0 (game->on_start);
    }

    al_start_timer (game->timer);
    game->last_update_time = al_get_time ();

    while (game->running) {
	game_process_event (game);

	if (game->redraw && al_is_event_queue_empty (game->event_queue)) {
	    game->redraw = false;
	    game_draw (game);
	}
    }

    game_destroy (game);

    return SCM_UNSPECIFIED;
}
Example #4
0
static SCM
scscm_call_0_body (void *argsp)
{
  SCM *args = argsp;

  return scm_call_0 (args[0]);
}
Example #5
0
static SCM dispatch_event(void *data) {
	SCM action = *((SCM *)data);
	scm_call_0(action);
	scm_gc_unprotect_object(action);
	scm_remember_upto_here_1(action);
	return SCM_BOOL_T;
	}
Example #6
0
/*! \brief Get the action position.
 * \par Function Description
 * Retrieves the current action position and stores it in \a x and \a
 * y, optionally snapping it to the grid if \a snap is true.  This
 * should be interpreted as the position that the user was pointing
 * with the mouse pointer when the current action was invoked.  If
 * there is no valid world position for the current action, returns
 * FALSE without modifying the output variables.
 *
 * This should be used by actions implemented in C to figure out where
 * on the schematic the user wants them to apply the action.
 *
 * See also the (gschem action) Scheme module.
 *
 * \param w_current    Current gschem toplevel structure.
 * \param x            Location to store x coordinate.
 * \param y            Location to store y coordinate.
 *
 * \return TRUE if current action position is set, FALSE otherwise.
 */
gboolean
g_action_get_position (gboolean snap, int *x, int *y)
{
  SCM s_action_position_proc;
  SCM s_point;
  GschemToplevel *w_current = g_current_window ();

  g_assert (w_current);

  /* Get the action-position procedure */
  s_action_position_proc =
    scm_variable_ref (scm_c_module_lookup (scm_c_resolve_module ("gschem action"),
                                           "action-position"));

  /* Retrieve the action position */
  s_point = scm_call_0 (s_action_position_proc);

  if (scm_is_false (s_point)) return FALSE;

  if (x) {
    *x = scm_to_int (scm_car (s_point));
    if (snap) {
      *x = snap_grid (w_current, *x);
    }
  }
  if (y) {
    *y = scm_to_int (scm_cdr (s_point));
    if (snap) {
      *y = snap_grid (w_current, *y);
    }
  }

  return TRUE;
}
Example #7
0
scm_t_bits
scm_dynstack_unwind_1 (scm_t_dynstack *dynstack)
{
  scm_t_bits tag;
  scm_t_bits *words;
  scm_t_dynstack_item_type type;

  tag = dynstack_pop (dynstack, &words);
  
  type = SCM_DYNSTACK_TAG_TYPE (tag);
  
  switch (type)
    {
    case SCM_DYNSTACK_TYPE_FRAME:
      break;

    case SCM_DYNSTACK_TYPE_UNWINDER:
      WINDER_PROC (words) (WINDER_DATA (words));
      clear_scm_t_bits (words, WINDER_WORDS);
      break;

    case SCM_DYNSTACK_TYPE_REWINDER:
      clear_scm_t_bits (words, WINDER_WORDS);
      break;

    case SCM_DYNSTACK_TYPE_WITH_FLUID:
      scm_swap_fluid (WITH_FLUID_FLUID (words),
                      WITH_FLUID_VALUE_BOX (words),
                      SCM_I_CURRENT_THREAD->dynamic_state);
      clear_scm_t_bits (words, WITH_FLUID_WORDS);
      break;

    case SCM_DYNSTACK_TYPE_PROMPT:
      /* we could invalidate the prompt */
      clear_scm_t_bits (words, PROMPT_WORDS);
      break;

    case SCM_DYNSTACK_TYPE_DYNWIND:
      {
        SCM proc = DYNWIND_LEAVE (words);
        clear_scm_t_bits (words, DYNWIND_WORDS);
        scm_call_0 (proc);
      }
      break;

    case SCM_DYNSTACK_TYPE_DYNAMIC_STATE:
      scm_variable_set_x (DYNAMIC_STATE_STATE_BOX (words),
                          scm_set_current_dynamic_state
                          (scm_variable_ref (DYNAMIC_STATE_STATE_BOX (words))));
      clear_scm_t_bits (words, DYNAMIC_STATE_WORDS);
      break;

    case SCM_DYNSTACK_TYPE_NONE:
    default:
      abort ();
    }

  return tag;
}
Example #8
0
/********************************************************************
 * update_report_list
 *
 * this procedure does the real work of displaying a sorted list of
 * available custom reports
 ********************************************************************/
static void
update_report_list(GtkListStore *store, CustomReportDialog *crd)
{
    SCM get_rpt_guids = scm_c_eval_string("gnc:custom-report-template-guids");
    SCM template_menu_name = scm_c_eval_string("gnc:report-template-menu-name/report-guid");
    SCM rpt_guids;
    int i;
    GtkTreeIter iter;
    GtkTreeModel *model = GTK_TREE_MODEL (store);
    gboolean valid_iter;

    gtk_tree_sortable_set_sort_column_id(GTK_TREE_SORTABLE(store), COL_NAME, GTK_SORT_ASCENDING);

    crd->reportlist = scm_call_0(get_rpt_guids);
    rpt_guids = crd->reportlist;

    /* Empty current liststore */
    valid_iter = gtk_tree_model_get_iter_first (model, &iter);
    while (valid_iter)
    {
        GValue value = { 0, };
        GncGUID *row_guid;
        g_value_init ( &value, G_TYPE_POINTER);
        gtk_tree_model_get_value (model, &iter, COL_NUM, &value);
        row_guid = (GncGUID *) g_value_get_pointer (&value);
        guid_free (row_guid);
        g_value_unset (&value);
        valid_iter = gtk_tree_model_iter_next (model, &iter);
    }
    gtk_list_store_clear(store);

    if (scm_is_list(rpt_guids))
    {
        /* for all the report guids in the list, store them, with a reference,
        	 in the gtkliststore */
        for (i = 0; !scm_is_null(rpt_guids); i++)
        {
            GncGUID *guid = guid_malloc ();
            gchar *guid_str = scm_to_utf8_string (SCM_CAR(rpt_guids));
            gchar *name = gnc_scm_to_utf8_string (scm_call_2(template_menu_name, SCM_CAR(rpt_guids), SCM_BOOL_F));

            if (string_to_guid (guid_str, guid))
            {
                gtk_list_store_append(store, &iter);
                gtk_list_store_set(store, &iter,
                                   COL_NAME, name,
                                   COL_NUM, guid,
                                   -1);
            }
            g_free (name);
            g_free (guid_str);

            rpt_guids = SCM_CDR(rpt_guids);
        }
    }
}
Example #9
0
static void
game_draw (Game *game)
{
    al_clear_to_color (al_map_rgb(0, 0, 0));

    if (scm_is_true (game->on_draw))
	scm_call_0 (game->on_draw);

    al_flip_display ();
}
int main( ){

	SCM func;
	scm_init_guile();
	scm_c_primitive_load( "helloworld.scm" );
	func = scm_variable_ref( scm_c_lookup( "hello_world" ) );
	scm_call_0( func );

	return 0;
}
Example #11
0
void
scm_dynstack_wind_1 (scm_t_dynstack *dynstack, scm_t_bits *item)
{
  scm_t_bits tag = SCM_DYNSTACK_TAG (item);
  scm_t_dynstack_item_type type = SCM_DYNSTACK_TAG_TYPE (tag);
  scm_t_bits flags = SCM_DYNSTACK_TAG_FLAGS (tag);
  size_t len = SCM_DYNSTACK_TAG_LEN (tag);
  
  switch (type)
    {
    case SCM_DYNSTACK_TYPE_FRAME:
      if (!(flags & SCM_F_DYNSTACK_FRAME_REWINDABLE))
        scm_misc_error ("scm_dynstack_wind_1",
                        "cannot invoke continuation from this context",
                        SCM_EOL);
      break;

    case SCM_DYNSTACK_TYPE_UNWINDER:
      break;

    case SCM_DYNSTACK_TYPE_REWINDER:
      WINDER_PROC (item) (WINDER_DATA (item));
      break;

    case SCM_DYNSTACK_TYPE_WITH_FLUID:
      scm_swap_fluid (WITH_FLUID_FLUID (item),
                      WITH_FLUID_VALUE_BOX (item),
                      SCM_I_CURRENT_THREAD->dynamic_state);
      break;

    case SCM_DYNSTACK_TYPE_PROMPT:
      /* see vm_reinstate_partial_continuation */
      break;

    case SCM_DYNSTACK_TYPE_DYNWIND:
      scm_call_0 (DYNWIND_ENTER (item));
      break;

    case SCM_DYNSTACK_TYPE_DYNAMIC_STATE:
      scm_variable_set_x (DYNAMIC_STATE_STATE_BOX (item),
                          scm_set_current_dynamic_state
                          (scm_variable_ref (DYNAMIC_STATE_STATE_BOX (item))));
      break;

    case SCM_DYNSTACK_TYPE_NONE:
    default:
      abort ();
    }

  {
    scm_t_bits *words = push_dynstack_entry (dynstack, type, flags, len);

    copy_scm_t_bits (words, item, len);
  }
}
Example #12
0
static int 
sf_close (SCM port)
{
  SCM p = SCM_PACK (SCM_STREAM (port));
  SCM f = SCM_SIMPLE_VECTOR_REF (p, 4);
  if (scm_is_false (f))
    return 0;
  f = scm_call_0 (f);
  errno = 0;
  return scm_is_false (f) ? EOF : 0;
}
Example #13
0
static void
call_scm_hook (GHook *hook, gpointer data)
{
    GncScmDangler *scm = hook->data;

    ENTER("hook %p, data %p, cbarg %p", hook, data, hook->data);

    scm_call_0 (scm->proc);

    LEAVE("");
}
Example #14
0
/*! \brief Re-poll a scheme procedure for symbols.
 *  \par Function Description
 *  Calls a Scheme procedure to obtain a list of available symbols,
 *  and updates the source with the new list
 *
 *  Private function used only in s_clib.c.
 */
static void refresh_scm (CLibSource *source)
{
  SCM symlist;
  SCM symname;
  CLibSymbol *symbol;
  char *tmp;

  g_return_if_fail (source != NULL);
  g_return_if_fail (source->type == CLIB_SCM);

  /* Clear the current symbol list */
  g_list_foreach (source->symbols, (GFunc) free_symbol, NULL);
  g_list_free (source->symbols);
  source->symbols = NULL;

  symlist = scm_call_0 (source->list_fn);

  if (scm_is_false (scm_list_p (symlist))) {
    s_log_message (_("Failed to scan library [%1$s]: Scheme function returned non-list."),
		   source->name);
    return;
  }

  while (!scm_is_null (symlist)) {
    symname = SCM_CAR (symlist);
    if (!scm_is_string (symname)) {
      s_log_message (_("Non-string symbol name while scanning library [%1$s]"),
		     source->name);
    } else {
      symbol = g_new0 (CLibSymbol, 1);
      symbol->source = source;

      /* Need to make sure that the correct free() function is called
       * on strings allocated by Guile. */
      tmp = scm_to_utf8_string (symname);
      symbol->name = g_strdup(tmp);
      free (tmp);

      /* Prepend because it's faster and it doesn't matter what order we
       * add them. */
      source->symbols = g_list_prepend (source->symbols, symbol);
    }

    symlist = SCM_CDR (symlist);
  }

  /* Now sort the list of symbols by name. */
  source->symbols = g_list_sort (source->symbols,
				 (GCompareFunc) compare_symbol_name);

  s_clib_flush_search_cache();
  s_clib_flush_symbol_cache();
}
Example #15
0
static void
sf_flush (SCM port)
{
  scm_t_port *pt = SCM_PTAB_ENTRY (port);
  SCM stream = SCM_PACK (pt->stream);

  SCM f = SCM_SIMPLE_VECTOR_REF (stream, 2);

  if (scm_is_true (f))
    scm_call_0 (f);

}
Example #16
0
static int 
sf_input_waiting (SCM port)
{
  SCM p = SCM_PACK (SCM_STREAM (port));
  if (SCM_SIMPLE_VECTOR_LENGTH (p) >= 6)
    {
      SCM f = SCM_SIMPLE_VECTOR_REF (p, 5);
      if (scm_is_true (f))
	return scm_to_int (scm_call_0 (f));
    }
  /* Default is such that char-ready? for soft ports returns #t, as it
     did before this extension was implemented. */
  return 1;
}
Example #17
0
void
start_command_key (Keys_t * key)
{
  if (key->command == NULL)
    {
#ifdef GUILE_FLAG
      if (key->function != 0)
	{
	  scm_call_0 (key->function);
	}
#endif
      return;
    }

  run_command (key->command);
}
Example #18
0
static void
game_update (Game *game)
{
    float time = al_get_time();
    float dt = time - game->last_update_time;

    game->redraw = true;
    game->last_update_time = time;
    game->time_accumulator += dt;

    while (game->time_accumulator >= game->timestep) {
        game->time_accumulator -= game->timestep;
        if (scm_is_true (game->on_update)) {
            scm_call_0 (game->on_update);
        }
    }
}
Example #19
0
int handle_key_press_event(void *data, xcb_connection_t *c, xcb_key_press_event_t *event)
{
    xcb_keycode_t keycode = event->detail;
    xcb_keysym_t keysym = xcb_key_symbols_get_keysym(wm_conf.key_syms, keycode, 0);
    fprintf(stderr, "key press: keycode %u, keysym %u, state %u\n", keycode, keysym, event->state);
    /* search key bindings */
    SCM key_proc = SCM_UNDEFINED;
    keybinding_t *binding = keybinding_list;
    while (binding) {
        if (binding->keysym == keysym && binding->mod_mask == event->state) {
            key_proc = binding->scm_proc;
        }
        binding = binding->next;
    }

    if (key_proc != SCM_UNDEFINED)
        scm_call_0(key_proc);

    return 0;
}
Example #20
0
SCM
clear_image (SCM image_smob)
{
  int area;
  struct image *image;

  scm_assert_smob_type (image_tag, image_smob);

  image = (struct image *) SCM_SMOB_DATA (image_smob);
  area = image->width * image->height;
  memset (image->pixels, 0, area);

  /* Invoke the image's update function.
   */
  if (scm_is_true (image->update_func))
    scm_call_0 (image->update_func);

  scm_remember_upto_here_1 (image_smob);

  return SCM_UNSPECIFIED;
}
Example #21
0
static SCM
eval (SCM x, SCM env)
{
  SCM mx;
  SCM proc = SCM_UNDEFINED, args = SCM_EOL;
  unsigned int argc;

 loop:
  SCM_TICK;
  
  mx = SCM_MEMOIZED_ARGS (x);
  switch (SCM_I_INUM (SCM_CAR (x)))
    {
    case SCM_M_SEQ:
      eval (CAR (mx), env);
      x = CDR (mx);
      goto loop;

    case SCM_M_IF:
      if (scm_is_true (EVAL1 (CAR (mx), env)))
        x = CADR (mx);
      else
        x = CDDR (mx);
      goto loop;

    case SCM_M_LET:
      {
        SCM inits = CAR (mx);
        SCM new_env;
        int i;

        new_env = make_env (VECTOR_LENGTH (inits), SCM_UNDEFINED, env);
        for (i = 0; i < VECTOR_LENGTH (inits); i++)
          env_set (new_env, 0, i, EVAL1 (VECTOR_REF (inits, i), env));
        env = new_env;
        x = CDR (mx);
        goto loop;
      }
          
    case SCM_M_LAMBDA:
      RETURN_BOOT_CLOSURE (mx, env);

    case SCM_M_CAPTURE_ENV:
      {
        SCM locs = CAR (mx);
        SCM new_env;
        int i;

        new_env = make_env (VECTOR_LENGTH (locs), SCM_BOOL_F, env);
        for (i = 0; i < VECTOR_LENGTH (locs); i++)
          {
            SCM loc = VECTOR_REF (locs, i);
            int depth, width;

            depth = SCM_I_INUM (CAR (loc));
            width = SCM_I_INUM (CDR (loc));
            env_set (new_env, 0, i, env_ref (env, depth, width));
          }

        env = new_env;
        x = CDR (mx);
        goto loop;
      }

    case SCM_M_QUOTE:
      return mx;

    case SCM_M_CAPTURE_MODULE:
      return eval (mx, scm_current_module ());

    case SCM_M_APPLY:
      /* Evaluate the procedure to be applied.  */
      proc = EVAL1 (CAR (mx), env);
      /* Evaluate the argument holding the list of arguments */
      args = EVAL1 (CADR (mx), env);
          
    apply_proc:
      /* Go here to tail-apply a procedure.  PROC is the procedure and
       * ARGS is the list of arguments. */
      if (BOOT_CLOSURE_P (proc))
        {
          prepare_boot_closure_env_for_apply (proc, args, &x, &env);
          goto loop;
        }
      else
        return scm_apply_0 (proc, args);

    case SCM_M_CALL:
      /* Evaluate the procedure to be applied.  */
      proc = EVAL1 (CAR (mx), env);
      argc = scm_ilength (CDR (mx));
      mx = CDR (mx);

      if (BOOT_CLOSURE_P (proc))
        {
          prepare_boot_closure_env_for_eval (proc, argc, mx, &x, &env);
          goto loop;
        }
      else
        {
	  SCM *argv;
	  unsigned int i;

	  argv = alloca (argc * sizeof (SCM));
	  for (i = 0; i < argc; i++, mx = CDR (mx))
	    argv[i] = EVAL1 (CAR (mx), env);

	  return scm_call_n (proc, argv, argc);
        }

    case SCM_M_CONT:
      return scm_i_call_with_current_continuation (EVAL1 (mx, env));

    case SCM_M_CALL_WITH_VALUES:
      {
        SCM producer;
        SCM v;

        producer = EVAL1 (CAR (mx), env);
        /* `proc' is the consumer.  */
        proc = EVAL1 (CDR (mx), env);
        v = scm_call_0 (producer);
        if (SCM_VALUESP (v))
          args = scm_struct_ref (v, SCM_INUM0);
        else
          args = scm_list_1 (v);
        goto apply_proc;
      }

    case SCM_M_LEXICAL_REF:
      {
        SCM pos;
        int depth, width;

        pos = mx;
        depth = SCM_I_INUM (CAR (pos));
        width = SCM_I_INUM (CDR (pos));

        return env_ref (env, depth, width);
      }

    case SCM_M_LEXICAL_SET:
      {
        SCM pos;
        int depth, width;
        SCM val = EVAL1 (CDR (mx), env);

        pos = CAR (mx);
        depth = SCM_I_INUM (CAR (pos));
        width = SCM_I_INUM (CDR (pos));

        env_set (env, depth, width, val);

        return SCM_UNSPECIFIED;
      }

    case SCM_M_BOX_REF:
      {
        SCM box = mx;

        return scm_variable_ref (EVAL1 (box, env));
      }

    case SCM_M_BOX_SET:
      {
        SCM box = CAR (mx), val = CDR (mx);

        return scm_variable_set_x (EVAL1 (box, env), EVAL1 (val, env));
      }

    case SCM_M_RESOLVE:
      if (SCM_VARIABLEP (mx))
        return mx;
      else
        {
          SCM var;

          var = scm_sys_resolve_variable (mx, env_tail (env));
          scm_set_cdr_x (x, var);

          return var;
        }

    case SCM_M_CALL_WITH_PROMPT:
      {
        struct scm_vm *vp;
        SCM k, handler, res;
        scm_i_jmp_buf registers;
        scm_t_ptrdiff saved_stack_depth;

        k = EVAL1 (CAR (mx), env);
        handler = EVAL1 (CDDR (mx), env);
        vp = scm_the_vm ();

        saved_stack_depth = vp->stack_top - vp->sp;

        /* Push the prompt onto the dynamic stack. */
        scm_dynstack_push_prompt (&SCM_I_CURRENT_THREAD->dynstack,
                                  SCM_F_DYNSTACK_PROMPT_ESCAPE_ONLY,
                                  k,
                                  vp->stack_top - vp->fp,
                                  saved_stack_depth,
                                  vp->ip,
                                  &registers);

        if (SCM_I_SETJMP (registers))
          {
            /* The prompt exited nonlocally. */
            scm_gc_after_nonlocal_exit ();
            proc = handler;
            args = scm_i_prompt_pop_abort_args_x (vp, saved_stack_depth);
            goto apply_proc;
          }
        
        res = scm_call_0 (eval (CADR (mx), env));
        scm_dynstack_pop (&SCM_I_CURRENT_THREAD->dynstack);
        return res;
      }

    default:
      abort ();
    }
}
void
SCMFunctor::operator()()
{
  scm_call_0(func);
}
Example #23
0
static SCM
load_thunk_from_memory (char *data, size_t len, int is_read_only)
#define FUNC_NAME "load-thunk-from-memory"
{
  Elf_Ehdr *header;
  Elf_Phdr *ph;
  const char *err_msg = 0;
  size_t n, alignment = 8;
  int i;
  int dynamic_segment = -1;
  SCM init = SCM_BOOL_F, entry = SCM_BOOL_F;
  char *frame_maps = 0;

  if (len < sizeof *header)
    ABORT ("object file too small");

  header = (Elf_Ehdr*) data;
  
  if ((err_msg = check_elf_header (header)))
    goto cleanup;

  if (header->e_phnum == 0)
    ABORT ("no loadable segments");
  n = header->e_phnum;

  if (len < header->e_phoff + n * sizeof (Elf_Phdr))
    ABORT ("object file too small");

  ph = (Elf_Phdr*) (data + header->e_phoff);

  /* Check that the segment table is sane.  */
  for (i = 0; i < n; i++)
    {
      if (ph[i].p_filesz != ph[i].p_memsz)
        ABORT ("expected p_filesz == p_memsz");

      if (!ph[i].p_flags)
        ABORT ("expected nonzero segment flags");

      if (ph[i].p_align < alignment)
        {
          if (ph[i].p_align % alignment)
            ABORT ("expected new alignment to be multiple of old");
          alignment = ph[i].p_align;
        }

      if (ph[i].p_type == PT_DYNAMIC)
        {
          if (dynamic_segment >= 0)
            ABORT ("expected only one PT_DYNAMIC segment");
          dynamic_segment = i;
          continue;
        }

      if (ph[i].p_type != PT_LOAD)
        ABORT ("unknown segment type");

      if (i == 0)
        {
          if (ph[i].p_vaddr != 0)
            ABORT ("first loadable vaddr is not 0");
        }
      else
        {
          if (ph[i].p_vaddr < ph[i-1].p_vaddr + ph[i-1].p_memsz)
            ABORT ("overlapping segments");

          if (ph[i].p_offset + ph[i].p_filesz > len)
            ABORT ("segment beyond end of byte array");
        }
    }

  if (dynamic_segment < 0)
    ABORT ("no PT_DYNAMIC segment");

  if (!IS_ALIGNED ((scm_t_uintptr) data, alignment))
    ABORT ("incorrectly aligned base");

  /* Allow writes to writable pages.  */
  if (is_read_only)
    {
#ifdef HAVE_SYS_MMAN_H
      for (i = 0; i < n; i++)
        {
          if (ph[i].p_type != PT_LOAD)
            continue;
          if (ph[i].p_flags == PF_R)
            continue;
          if (ph[i].p_align != 4096)
            continue;

          if (mprotect (data + ph[i].p_vaddr,
                        ph[i].p_memsz,
                        segment_flags_to_prot (ph[i].p_flags)))
            goto cleanup;
        }
#else
      ABORT ("expected writable pages");
#endif
    }

  if ((err_msg = process_dynamic_segment (data, &ph[dynamic_segment],
                                          &init, &entry, &frame_maps)))
    goto cleanup;

  if (scm_is_true (init))
    scm_call_0 (init);

  register_elf (data, len, frame_maps);

  /* Finally!  Return the thunk.  */
  return entry;

 cleanup:
  {
    if (errno)
      SCM_SYSERROR;
    scm_misc_error (FUNC_NAME, err_msg ? err_msg : "error loading ELF file",
                    SCM_EOL);
  }
}
static void
update_display_lists(gnc_column_view_edit * view)
{
    SCM   get_names = scm_c_eval_string("gnc:all-report-template-names");
    SCM   template_menu_name = scm_c_eval_string("gnc:report-template-menu-name/report-guid");
    SCM   report_menu_name = scm_c_eval_string("gnc:report-menu-name");
    SCM   names = scm_call_0(get_names);
    SCM   contents =
        gnc_option_db_lookup_option(view->odb, "__general", "report-list",
                                    SCM_BOOL_F);
    SCM   this_report;
    SCM   selection;
    const gchar *name;
    int   row, i, id;
    GtkListStore *store;
    GtkTreeIter iter;
    GtkTreePath *path;
    GtkTreeSelection *tree_selection;


    /* Update the list of available reports (left selection box). */
    row = view->available_selected;

    if (scm_is_list(view->available_list) && !scm_is_null (view->available_list))
    {
        row = MIN (row, scm_ilength (view->available_list) - 1);
        selection = scm_list_ref (view->available_list, scm_int2num (row));
    }
    else
    {
        selection = SCM_UNDEFINED;
    }

    scm_gc_unprotect_object(view->available_list);
    view->available_list = names;
    scm_gc_protect_object(view->available_list);

    store = GTK_LIST_STORE(gtk_tree_view_get_model(view->available));
    gtk_list_store_clear(store);

    if (scm_is_list(names))
    {
        for (i = 0; !scm_is_null(names); names = SCM_CDR(names), i++)
        {
            char * str;

            if (scm_is_equal (SCM_CAR(names), selection))
                row = i;
            scm_dynwind_begin (0); 
            str = scm_to_locale_string (scm_call_2(template_menu_name, SCM_CAR(names),
                                          SCM_BOOL_F));
            name = _(g_strdup (str));
            scm_dynwind_free (str); 
            scm_dynwind_end (); 
            gtk_list_store_append(store, &iter);
            gtk_list_store_set(store, &iter,
                               AVAILABLE_COL_NAME, name,
                               AVAILABLE_COL_ROW, i,
                               -1);
        }

    }

    tree_selection = gtk_tree_view_get_selection(view->available);
    path = gtk_tree_path_new_from_indices(row, -1);
    gtk_tree_selection_select_path(tree_selection, path);
    gtk_tree_path_free(path);


    /* Update the list of selected reports (right selection box). */
    row = view->contents_selected;

    if (scm_is_list(view->contents_list) && !scm_is_null (view->contents_list))
    {
        row = MIN (row, scm_ilength (view->contents_list) - 1);
        selection = scm_list_ref (view->contents_list, scm_int2num (row));
    }
    else
    {
        selection = SCM_UNDEFINED;
    }

    scm_gc_unprotect_object(view->contents_list);
    view->contents_list = contents;
    scm_gc_protect_object(view->contents_list);

    store = GTK_LIST_STORE(gtk_tree_view_get_model(view->contents));
    gtk_list_store_clear(store);
    if (scm_is_list(contents))
    {
        for (i = 0; !scm_is_null(contents); contents = SCM_CDR(contents), i++)
        {
            char * str;

            if (scm_is_equal (SCM_CAR(contents), selection))
                row = i;

            id = scm_num2int(SCM_CAAR(contents), SCM_ARG1, G_STRFUNC);
            this_report = gnc_report_find(id);
            scm_dynwind_begin (0); 
            str = scm_to_locale_string (scm_call_1(report_menu_name, this_report));
            name = _(g_strdup (str));
            scm_dynwind_free (str); 
            scm_dynwind_end (); 

            gtk_list_store_append(store, &iter);
            gtk_list_store_set
            (store, &iter,
             CONTENTS_COL_NAME, name,
             CONTENTS_COL_ROW, i,
             CONTENTS_COL_REPORT_COLS, scm_num2int(SCM_CADR(SCM_CAR(contents)),
                                                   SCM_ARG1, G_STRFUNC),
             CONTENTS_COL_REPORT_ROWS, scm_num2int(SCM_CADDR(SCM_CAR(contents)),
                                                   SCM_ARG1, G_STRFUNC),
             -1);
        }
    }

    tree_selection = gtk_tree_view_get_selection(view->contents);
    path = gtk_tree_path_new_from_indices(row, -1);
    gtk_tree_selection_select_path(tree_selection, path);
    //  gtk_tree_view_scroll_to_cell(view->contents, path, NULL, TRUE, 0.5, 0.0);
    gtk_tree_path_free(path);
}
Example #25
0
/*
 * f_suite
 */
void f_suite ( bool keypress )
{

    if (debug)
        printf("\nDEBUT f_suite\n");

    if (display == NULL) exit(1);
    unsigned int i = 0;
    if (cpy == NULL) exit(1);
    strcpy(suite,cpy);
    cpy[0] = '\0';
//	suite[strlen(suite)]='\0';

    for(i=0; i < mod_key.nombre; i++)
    {
        if (mod_key.key[i].pressed)
        {
            if (debug)
                printf("  MODE\n");
            nbchar = sizeof(char) * (strlen(suite) + strlen(cpy) + strlen( XKeysymToString( XKeycodeToKeysym( display, mod_key.key[i].key, 1))) + 1 );
            resize();
            strcat(cpy, XKeysymToString( XKeycodeToKeysym( display, mod_key.key[i].key, 1)) );
            strcat(cpy," ");
        }
    }

    strcat(cpy, suite);
    if (debug)
        printf("\tsuite = |%s|\nCPY = |%s|\n",suite,cpy);

//on suprime le charactère espace de fin
    if (strlen(suite) > 0)
        suite[strlen(suite) -1 ] = '\0';
    if (strlen(cpy) > 0)
        cpy[strlen(cpy) -1 ] = '\0';

    if ( keypress )
    {
        if ( (verbose) && (strcmp(cpy,"") != 0) )
            printf("(roclick_KP \"%s\")\n",cpy);

        for(i=0; i<nb_scheme_KP; i++)
        {
// si la combinaison actuelle a été défini sur KeyPress
            if ( (strlen(cpy) > 0) && (strcmp( cpy, scheme_KP[i].scheme)== 0) )
            {
                scm_call_0 (scheme_KP[i].fonction);
            }
// si la combinaison actuelle a été défini sur KeyPress avec le mod "all"
            if ( (strlen(scheme_KP[i].scheme) > 3) && (strlen(suite) > 0) && (strncmp( scheme_KP[i].scheme, "all", 3) == 0) && (strcmp( suite, &scheme_KP[i].scheme[4]) == 0) )
            {
                scm_call_0 (scheme_KP[i].fonction);
            }
        }
    }
    else
    {
        if ( (verbose) && (strcmp(cpy,"") != 0) )
            printf("(roclick_KR \"%s\")\n",cpy);

        for(i=0; i<nb_scheme_KR; i++)
        {
// si la combinaison actuelle a été défini sur KeyRelease
            if ( (strlen(cpy) > 0) && (strcmp( cpy, scheme_KR[i].scheme) == 0) )
            {
                scm_call_0 (scheme_KR[i].fonction);
            }
// si la combinaison actuelle a été défini sur KeyRelease avec le mod "all"
            if ( (strlen(scheme_KR[i].scheme) > 3) && (strlen(suite) > 0) && (strncmp( scheme_KR[i].scheme, "all", 3) == 0) && (strcmp( suite, &scheme_KR[i].scheme[4]) == 0) )
            {
                scm_call_0 (scheme_KR[i].fonction);
            }
        }
    }

    if (debug)
        printf("  strlen(suite) = %i\n",(int)strlen(suite));
    if (strlen(suite) > 0)
        suite[strlen(suite)] = ' ';
    if (debug)
        printf("FIN f_suite\n\n");
}
Example #26
0
static SCM
eval (SCM x, SCM env)
{
  SCM mx;
  SCM proc = SCM_UNDEFINED, args = SCM_EOL;
  unsigned int argc;

 loop:
  SCM_TICK;
  if (!SCM_MEMOIZED_P (x))
    abort ();
  
  mx = SCM_MEMOIZED_ARGS (x);
  switch (SCM_MEMOIZED_TAG (x))
    {
    case SCM_M_SEQ:
      eval (CAR (mx), env);
      x = CDR (mx);
      goto loop;

    case SCM_M_IF:
      if (scm_is_true (EVAL1 (CAR (mx), env)))
        x = CADR (mx);
      else
        x = CDDR (mx);
      goto loop;

    case SCM_M_LET:
      {
        SCM inits = CAR (mx);
        SCM new_env = CAPTURE_ENV (env);
        for (; scm_is_pair (inits); inits = CDR (inits))
          new_env = scm_cons (EVAL1 (CAR (inits), env),
                              new_env);
        env = new_env;
        x = CDR (mx);
        goto loop;
      }
          
    case SCM_M_LAMBDA:
      RETURN_BOOT_CLOSURE (mx, CAPTURE_ENV (env));

    case SCM_M_QUOTE:
      return mx;

    case SCM_M_DEFINE:
      scm_define (CAR (mx), EVAL1 (CDR (mx), env));
      return SCM_UNSPECIFIED;

    case SCM_M_DYNWIND:
      {
        SCM in, out, res;
        scm_i_thread *t = SCM_I_CURRENT_THREAD;
        in = EVAL1 (CAR (mx), env);
        out = EVAL1 (CDDR (mx), env);
        scm_call_0 (in);
        scm_dynstack_push_dynwind (&t->dynstack, in, out);
        res = eval (CADR (mx), env);
        scm_dynstack_pop (&t->dynstack);
        scm_call_0 (out);
        return res;
      }

    case SCM_M_WITH_FLUIDS:
      {
        long i, len;
        SCM *fluidv, *valuesv, walk, res;
        scm_i_thread *thread = SCM_I_CURRENT_THREAD;

        len = scm_ilength (CAR (mx));
        fluidv = alloca (sizeof (SCM)*len);
        for (i = 0, walk = CAR (mx); i < len; i++, walk = CDR (walk))
          fluidv[i] = EVAL1 (CAR (walk), env);
        valuesv = alloca (sizeof (SCM)*len);
        for (i = 0, walk = CADR (mx); i < len; i++, walk = CDR (walk))
          valuesv[i] = EVAL1 (CAR (walk), env);
        
        scm_dynstack_push_fluids (&thread->dynstack, len, fluidv, valuesv,
                                  thread->dynamic_state);
        res = eval (CDDR (mx), env);
        scm_dynstack_unwind_fluids (&thread->dynstack, thread->dynamic_state);
        
        return res;
      }

    case SCM_M_APPLY:
      /* Evaluate the procedure to be applied.  */
      proc = EVAL1 (CAR (mx), env);
      /* Evaluate the argument holding the list of arguments */
      args = EVAL1 (CADR (mx), env);
          
    apply_proc:
      /* Go here to tail-apply a procedure.  PROC is the procedure and
       * ARGS is the list of arguments. */
      if (BOOT_CLOSURE_P (proc))
        {
          prepare_boot_closure_env_for_apply (proc, args, &x, &env);
          goto loop;
        }
      else
        return scm_call_with_vm (scm_the_vm (), proc, args);

    case SCM_M_CALL:
      /* Evaluate the procedure to be applied.  */
      proc = EVAL1 (CAR (mx), env);
      argc = SCM_I_INUM (CADR (mx));
      mx = CDDR (mx);

      if (BOOT_CLOSURE_P (proc))
        {
          prepare_boot_closure_env_for_eval (proc, argc, mx, &x, &env);
          goto loop;
        }
      else
        {
	  SCM *argv;
	  unsigned int i;

	  argv = alloca (argc * sizeof (SCM));
	  for (i = 0; i < argc; i++, mx = CDR (mx))
	    argv[i] = EVAL1 (CAR (mx), env);

	  return scm_c_vm_run (scm_the_vm (), proc, argv, argc);
        }

    case SCM_M_CONT:
      return scm_i_call_with_current_continuation (EVAL1 (mx, env));

    case SCM_M_CALL_WITH_VALUES:
      {
        SCM producer;
        SCM v;

        producer = EVAL1 (CAR (mx), env);
        /* `proc' is the consumer.  */
        proc = EVAL1 (CDR (mx), env);
        v = scm_call_with_vm (scm_the_vm (), producer, SCM_EOL);
        if (SCM_VALUESP (v))
          args = scm_struct_ref (v, SCM_INUM0);
        else
          args = scm_list_1 (v);
        goto apply_proc;
      }

    case SCM_M_LEXICAL_REF:
      {
        int n;
        SCM ret;
        for (n = SCM_I_INUM (mx); n; n--)
          env = CDR (env);
        ret = CAR (env);
        if (SCM_UNLIKELY (SCM_UNBNDP (ret)))
          /* we don't know what variable, though, because we don't have its
             name */
          error_used_before_defined ();
        return ret;
      }

    case SCM_M_LEXICAL_SET:
      {
        int n;
        SCM val = EVAL1 (CDR (mx), env);
        for (n = SCM_I_INUM (CAR (mx)); n; n--)
          env = CDR (env);
        SCM_SETCAR (env, val);
        return SCM_UNSPECIFIED;
      }

    case SCM_M_TOPLEVEL_REF:
      if (SCM_VARIABLEP (mx))
        return SCM_VARIABLE_REF (mx);
      else
        {
          while (scm_is_pair (env))
            env = CDR (env);
          return SCM_VARIABLE_REF
            (scm_memoize_variable_access_x (x, CAPTURE_ENV (env)));
        }

    case SCM_M_TOPLEVEL_SET:
      {
        SCM var = CAR (mx);
        SCM val = EVAL1 (CDR (mx), env);
        if (SCM_VARIABLEP (var))
          {
            SCM_VARIABLE_SET (var, val);
            return SCM_UNSPECIFIED;
          }
        else
          {
            while (scm_is_pair (env))
              env = CDR (env);
            SCM_VARIABLE_SET
              (scm_memoize_variable_access_x (x, CAPTURE_ENV (env)),
               val);
            return SCM_UNSPECIFIED;
          }
      }

    case SCM_M_MODULE_REF:
      if (SCM_VARIABLEP (mx))
        return SCM_VARIABLE_REF (mx);
      else
        return SCM_VARIABLE_REF
          (scm_memoize_variable_access_x (x, SCM_BOOL_F));

    case SCM_M_MODULE_SET:
      if (SCM_VARIABLEP (CDR (mx)))
        {
          SCM_VARIABLE_SET (CDR (mx), EVAL1 (CAR (mx), env));
          return SCM_UNSPECIFIED;
        }
      else
        {
          SCM_VARIABLE_SET
            (scm_memoize_variable_access_x (x, SCM_BOOL_F),
             EVAL1 (CAR (mx), env));
          return SCM_UNSPECIFIED;
        }

    case SCM_M_PROMPT:
      {
        SCM vm, k, res;
        scm_i_jmp_buf registers;
        /* We need the handler after nonlocal return to the setjmp, so
           make sure it is volatile.  */
        volatile SCM handler;

        k = EVAL1 (CAR (mx), env);
        handler = EVAL1 (CDDR (mx), env);
        vm = scm_the_vm ();

        /* Push the prompt onto the dynamic stack. */
        scm_dynstack_push_prompt (&SCM_I_CURRENT_THREAD->dynstack,
                                  SCM_F_DYNSTACK_PROMPT_ESCAPE_ONLY,
                                  k,
                                  SCM_VM_DATA (vm)->fp,
                                  SCM_VM_DATA (vm)->sp,
                                  SCM_VM_DATA (vm)->ip,
                                  &registers);

        if (SCM_I_SETJMP (registers))
          {
            /* The prompt exited nonlocally. */
            proc = handler;
            args = scm_i_prompt_pop_abort_args_x (scm_the_vm ());
            goto apply_proc;
          }
        
        res = eval (CADR (mx), env);
        scm_dynstack_pop (&SCM_I_CURRENT_THREAD->dynstack);
        return res;
      }

    default:
      abort ();
    }
}
Example #27
0
File: objcodes.c Project: ijp/guile
static SCM
load_thunk_from_fd_using_mmap (int fd)
#define FUNC_NAME "load-thunk-from-disk"
{
  Elf_Ehdr header;
  Elf_Phdr *ph;
  const char *err_msg = 0;
  char *base = 0;
  size_t n;
  int i;
  int start_segment = -1;
  int prev_segment = -1;
  int dynamic_segment = -1;
  SCM init = SCM_BOOL_F, entry = SCM_BOOL_F;

  if (full_read (fd, &header, sizeof header) != sizeof header)
    ABORT ("object file too small");

  if ((err_msg = check_elf_header (&header)))
    goto cleanup;

  if (lseek (fd, header.e_phoff, SEEK_SET) == (off_t) -1)
    goto cleanup;
  
  n = header.e_phnum;
  ph = scm_gc_malloc_pointerless (n * sizeof (Elf_Phdr), "segment headers");

  if (full_read (fd, ph, n * sizeof (Elf_Phdr)) != n * sizeof (Elf_Phdr))
    ABORT ("failed to read program headers");
      
  for (i = 0; i < n; i++)
    {
      if (!ph[i].p_memsz)
        continue;

      if (ph[i].p_filesz != ph[i].p_memsz)
        ABORT ("expected p_filesz == p_memsz");
      
      if (!ph[i].p_flags)
        ABORT ("expected nonzero segment flags");

      if (ph[i].p_type == PT_DYNAMIC)
        {
          if (dynamic_segment >= 0)
            ABORT ("expected only one PT_DYNAMIC segment");
          dynamic_segment = i;
        }

      if (start_segment < 0)
        {
          if (!base && ph[i].p_vaddr)
            ABORT ("first loadable vaddr is not 0");
            
          start_segment = prev_segment = i;
          continue;
        }

      if (ph[i].p_flags == ph[start_segment].p_flags)
        {
          if (ph[i].p_vaddr - ph[prev_segment].p_vaddr 
              != ph[i].p_offset - ph[prev_segment].p_offset)
            ABORT ("coalesced segments not contiguous");

          prev_segment = i;
          continue;
        }

      /* Otherwise we have a new kind of segment.  Map previous
         segments.  */
      if (map_segments (fd, &base, &ph[start_segment], &ph[prev_segment]))
        goto cleanup;

      /* Open a new set of segments.  */
      start_segment = prev_segment = i;
    }

  /* Map last segments.  */
  if (start_segment < 0)
    ABORT ("no loadable segments");

  if (map_segments (fd, &base, &ph[start_segment], &ph[prev_segment]))
    goto cleanup;

  if (dynamic_segment < 0)
    ABORT ("no PT_DYNAMIC segment");

  if ((err_msg = process_dynamic_segment (base, &ph[dynamic_segment],
                                          &init, &entry)))
    goto cleanup;

  if (scm_is_true (init))
    scm_call_0 (init);

  /* Finally!  Return the thunk.  */
  return entry;

  /* FIXME: munmap on error? */
 cleanup:
  {
    int errno_save = errno;
    (void) close (fd);
    errno = errno_save;
    if (errno)
      SCM_SYSERROR;
    scm_misc_error (FUNC_NAME, err_msg ? err_msg : "error loading ELF file",
                    SCM_EOL);
  }
}
Example #28
0
File: objcodes.c Project: ijp/guile
static SCM
load_thunk_from_memory (char *data, size_t len)
#define FUNC_NAME "load-thunk-from-memory"
{
  Elf_Ehdr header;
  Elf_Phdr *ph;
  const char *err_msg = 0;
  char *base = 0;
  size_t n, memsz = 0, alignment = 8;
  int i;
  int first_loadable = -1;
  int start_segment = -1;
  int prev_segment = -1;
  int dynamic_segment = -1;
  SCM init = SCM_BOOL_F, entry = SCM_BOOL_F;

  if (len < sizeof header)
    ABORT ("object file too small");

  memcpy (&header, data, sizeof header);

  if ((err_msg = check_elf_header (&header)))
    goto cleanup;

  n = header.e_phnum;
  if (len < header.e_phoff + n * sizeof (Elf_Phdr))
    goto cleanup;
  ph = (Elf_Phdr*) (data + header.e_phoff);

  for (i = 0; i < n; i++)
    {
      if (!ph[i].p_memsz)
        continue;

      if (ph[i].p_filesz != ph[i].p_memsz)
        ABORT ("expected p_filesz == p_memsz");

      if (!ph[i].p_flags)
        ABORT ("expected nonzero segment flags");

      if (ph[i].p_align < alignment)
        {
          if (ph[i].p_align % alignment)
            ABORT ("expected new alignment to be multiple of old");
          alignment = ph[i].p_align;
        }

      if (ph[i].p_type == PT_DYNAMIC)
        {
          if (dynamic_segment >= 0)
            ABORT ("expected only one PT_DYNAMIC segment");
          dynamic_segment = i;
        }

      if (first_loadable < 0)
        {
          if (ph[i].p_vaddr)
            ABORT ("first loadable vaddr is not 0");

          first_loadable = i;
        }

      if (ph[i].p_vaddr < memsz)
        ABORT ("overlapping segments");

      if (ph[i].p_offset + ph[i].p_filesz > len)
        ABORT ("segment beyond end of byte array");

      memsz = ph[i].p_vaddr + ph[i].p_memsz;
    }

  if (first_loadable < 0)
    ABORT ("no loadable segments");

  if (dynamic_segment < 0)
    ABORT ("no PT_DYNAMIC segment");

  /* Now copy segments.  */

  /* We leak this memory, as we leak the memory mappings in
     load_thunk_from_fd_using_mmap.

     If the file is has an alignment of 8, use the standard malloc.
     (FIXME to ensure alignment on non-GNU malloc.)  Otherwise use
     posix_memalign.  We only use mprotect if the aligment is 4096.  */
  if (alignment == 8)
    {
      base = malloc (memsz);
      if (!base)
        goto cleanup;
    }
  else
    if ((errno = posix_memalign ((void **) &base, alignment, memsz)))
      goto cleanup;

  memset (base, 0, memsz);

  for (i = 0; i < n; i++)
    {
      if (!ph[i].p_memsz)
        continue;

      memcpy (base + ph[i].p_vaddr,
              data + ph[i].p_offset,
              ph[i].p_memsz);

      if (start_segment < 0)
        {
          start_segment = prev_segment = i;
          continue;
        }

      if (ph[i].p_flags == ph[start_segment].p_flags)
        {
          prev_segment = i;
          continue;
        }

      if (alignment == 4096)
        if (mprotect_segments (base, &ph[start_segment], &ph[prev_segment]))
          goto cleanup;

      /* Open a new set of segments.  */
      start_segment = prev_segment = i;
    }

  /* Mprotect the last segments.  */
  if (alignment == 4096)
    if (mprotect_segments (base, &ph[start_segment], &ph[prev_segment]))
      goto cleanup;

  if ((err_msg = process_dynamic_segment (base, &ph[dynamic_segment],
                                          &init, &entry)))
    goto cleanup;

  if (scm_is_true (init))
    scm_call_0 (init);

  /* Finally!  Return the thunk.  */
  return entry;

 cleanup:
  {
    if (errno)
      SCM_SYSERROR;
    scm_misc_error (FUNC_NAME, err_msg ? err_msg : "error loading ELF file",
                    SCM_EOL);
  }
}