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841288ec53
* elf/dl-init.c (_dl_init): We don't need to call constructors recursively. Fold _dl_init_rec in _dl_init and optimize a bit more.
112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/* Return the next shared object initializer function not yet run.
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Copyright (C) 1995, 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stddef.h>
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#include <ldsodefs.h>
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/* Type of the initializer. */
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typedef void (*init_t) (int, char **, char **);
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void
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internal_function
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_dl_init (struct link_map *main_map, int argc, char **argv, char **env)
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{
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struct r_debug *r;
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unsigned int i;
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/* Notify the debugger we have added some objects. We need to call
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_dl_debug_initialize in a static program in case dynamic linking has
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not been used before. */
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r = _dl_debug_initialize (0);
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r->r_state = RT_ADD;
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_dl_debug_state ();
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/* Stupid users forces the ELF specification to be changed. It now
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says that the dynamic loader is responsible for determining the
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order in which the constructors have to run. The constructors
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for all dependencies of an object must run before the constructor
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for the object itself. Circular dependencies are left unspecified.
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This is highly questionable since it puts the burden on the dynamic
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loader which has to find the dependencies at runtime instead of
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letting the user do it right. Stupidity rules! */
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i = main_map->l_searchlist.r_nlist;
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while (i-- > 0)
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{
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struct link_map *l = main_map->l_initfini[i];
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init_t init;
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if (l->l_init_called)
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/* This object is all done. */
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continue;
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/* Avoid handling this constructor again in case we have a circular
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dependency. */
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l->l_init_called = 1;
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/* Check for object which constructors we do not run here. */
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if (l->l_name[0] == '\0' && l->l_type == lt_executable)
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continue;
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/* Are there any constructors? */
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if (l->l_info[DT_INIT] == NULL && l->l_info[DT_INIT_ARRAY] == NULL)
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continue;
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/* Print a debug message if wanted. */
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if (_dl_debug_impcalls)
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_dl_debug_message (1, "\ncalling init: ",
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l->l_name[0] ? l->l_name : _dl_argv[0],
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"\n\n", NULL);
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/* Now run the local constructors. There are two forms of them:
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- the one named by DT_INIT
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- the others in the DT_INIT_ARRAY.
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*/
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if (l->l_info[DT_INIT] != NULL)
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{
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init = (init_t) (l->l_addr + l->l_info[DT_INIT]->d_un.d_ptr);
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/* Call the function. */
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init (argc, argv, env);
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}
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/* Next see whether there is an array with initialiazation functions. */
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if (l->l_info[DT_INIT_ARRAY] != NULL)
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{
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unsigned int j;
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unsigned int jm;
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ElfW(Addr) *addrs;
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jm = l->l_info[DT_INIT_ARRAYSZ]->d_un.d_val / sizeof (ElfW(Addr));
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addrs = (ElfW(Addr) *) (l->l_info[DT_INIT_ARRAY]->d_un.d_ptr
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+ l->l_addr);
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for (j = 0; j < jm; ++j)
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((init_t) addrs[j]) (argc, argv, env);
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}
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}
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/* Notify the debugger all new objects are now ready to go. */
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r->r_state = RT_CONSISTENT;
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_dl_debug_state ();
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}
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