Subversion Repositories hf-risc

/* Variable initialization.  MIPS version.

   Copyright (C) 2001, 2002, 2003, 2005 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 Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#include <ldsodefs.h>

#ifdef SHARED

void

_dl_var_init (void *array[])

{

  /* It has to match "variables" below. */

  enum

    {

      DL_PAGESIZE = 0

    };

  GLRO(dl_pagesize) = *((size_t *) array[DL_PAGESIZE]);

}

#else

#include <bits/libc-lock.h>

__libc_lock_define_initialized_recursive (static, _dl_static_lock)

static void *variables[] =

{

  &GLRO(dl_pagesize)

};

static void

_dl_unprotect_relro (struct link_map *l)

{

  ElfW(Addr) start = ((l->l_addr + l->l_relro_addr)

                      & ~(GLRO(dl_pagesize) - 1));

  ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size)

                    & ~(GLRO(dl_pagesize) - 1));

  if (start != end)

    __mprotect ((void *) start, end - start, PROT_READ | PROT_WRITE);

}

void

_dl_static_init (struct link_map *l)

{

  struct link_map *rtld_map = l;

  struct r_scope_elem **scope;

  const ElfW(Sym) *ref = NULL;

  lookup_t loadbase;

  void (*f) (void *[]);

  size_t i;

  __libc_lock_lock_recursive (_dl_static_lock);

  loadbase = _dl_lookup_symbol_x ("_dl_var_init", l, &ref, l->l_local_scope,

                                  NULL, 0, 1, NULL);

  for (scope = l->l_local_scope; *scope != NULL; scope++)

    for (i = 0; i < (*scope)->r_nlist; i++)

      if ((*scope)->r_list[i] == loadbase)

        {

          rtld_map = (*scope)->r_list[i];

          break;

        }

  if (ref != NULL)

    {

      f = (void (*) (void *[])) DL_SYMBOL_ADDRESS (loadbase, ref);

      _dl_unprotect_relro (rtld_map);

      f (variables);

      _dl_protect_relro (rtld_map);

    }

  __libc_lock_unlock_recursive (_dl_static_lock);

}

#endif