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