90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/* Return the next shared object initializer function not yet run.
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Copyright (C) 1995 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
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <stddef.h>
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#include <link.h>
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Elf32_Addr
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_dl_init_next (void)
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{
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struct link_map *l;
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Elf32_Addr init;
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Elf32_Addr next_init (struct link_map *l)
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{
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if (l->l_init_called)
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/* This object is all done. */
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return 0;
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if (l->l_init_running)
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{
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/* This object's initializer was just running.
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Now mark it as having run, so this object
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will be skipped in the future. */
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l->l_init_called = 1;
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l->l_init_running = 0;
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return 0;
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}
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if (l->l_info[DT_NEEDED])
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{
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/* Find each dependency in order, and see if it
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needs to run an initializer. */
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const char *strtab
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= ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);
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const Elf32_Dyn *d;
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for (d = l->l_ld; d->d_tag != DT_NULL; ++d)
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if (d->d_tag == DT_NEEDED)
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{
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struct link_map *needed
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= _dl_map_object (l, strtab + d->d_un.d_val);
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Elf32_Addr init;
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--needed->l_opencount;
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init = next_init (needed); /* Recurse on this dependency. */
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if (init != 0)
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return init;
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}
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}
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if (l->l_info[DT_INIT] &&
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!(l->l_name[0] == '\0' && l->l_type == lt_executable))
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{
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/* Run this object's initializer. */
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l->l_init_running = 1;
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return l->l_addr + l->l_info[DT_INIT]->d_un.d_ptr;
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}
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/* No initializer for this object.
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Mark it so we will skip it in the future. */
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l->l_init_called = 1;
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return 0;
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}
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/* Look for the first initializer not yet called. */
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l = _dl_loaded;
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do
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{
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init = next_init (l);
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l = l->l_next;
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}
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while (init == 0 && l);
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return init;
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}
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