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/* Return the next shared object initializer function not yet run.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <stddef.h>
#include <link.h>
Elf32_Addr
_dl_init_next (void)
{
struct link_map *l;
Elf32_Addr init;
Elf32_Addr next_init (struct link_map *l)
{
if (l->l_init_called)
/* This object is all done. */
return 0;
if (l->l_init_running)
{
/* This object's initializer was just running.
Now mark it as having run, so this object
will be skipped in the future. */
l->l_init_called = 1;
l->l_init_running = 0;
return 0;
}
if (l->l_info[DT_NEEDED])
{
/* Find each dependency in order, and see if it
needs to run an initializer. */
const char *strtab
= ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);
const Elf32_Dyn *d;
for (d = l->l_ld; d->d_tag != DT_NULL; ++d)
if (d->d_tag == DT_NEEDED)
{
struct link_map *needed
= _dl_map_object (l, strtab + d->d_un.d_val);
Elf32_Addr init;
--needed->l_opencount;
init = next_init (needed); /* Recurse on this dependency. */
if (init != 0)
return init;
}
}
if (l->l_info[DT_INIT] &&
!(l->l_name[0] == '\0' && l->l_type == lt_executable))
{
/* Run this object's initializer. */
l->l_init_running = 1;
return l->l_addr + l->l_info[DT_INIT]->d_un.d_ptr;
}
/* No initializer for this object.
Mark it so we will skip it in the future. */
l->l_init_called = 1;
return 0;
}
/* Look for the first initializer not yet called. */
l = _dl_loaded;
do
{
init = next_init (l);
l = l->l_next;
}
while (init == 0 && l);
return init;
}
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