/* Do relocations for ELF dynamic linking.
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.  */

/* This file may be included twice, to define both
   `elf_dynamic_do_rel' and `elf_dynamic_do_rela'.  */

#ifdef DO_RELA
#define elf_dynamic_do_rel	elf_dynamic_do_rela
#define	Elf32_Rel		Elf32_Rela
#define elf_machine_rel		elf_machine_rela
#endif


/* Perform the relocations in MAP on the running program image as specified
   by RELTAG, SZTAG.  *RESOLVE is called to resolve symbol values; it
   modifies its argument pointer to point to the defining symbol, and
   returns the base load address of the defining object.  */

static inline void
elf_dynamic_do_rel (struct link_map *map,
		    int reltag, int sztag, 
		    Elf32_Addr (*resolve) (const Elf32_Sym **))
{
  const Elf32_Sym *const symtab
    = (const Elf32_Sym *) map->l_info[DT_SYMTAB]->d_un.d_ptr;
  const Elf32_Rel *r = (const Elf32_Rel *) map->l_info[reltag]->d_un.d_ptr;
  const Elf32_Rel *end = &r[map->l_info[sztag]->d_un.d_val / sizeof *r];

  for (; r < end; ++r)
    {
      const Elf32_Sym *definer = &symtab[ELF32_R_SYM (r->r_info)];
      Elf32_Addr loadbase;

      if (ELF32_R_SYM (r->r_info) == STN_UNDEF)
	loadbase = 0;		/* This value will not be consulted.  */
      else
	{
	  if (resolve)
	    loadbase = (*resolve) (&definer);
	  else
	    {
	      assert (definer->st_shndx != SHN_UNDEF);
	      loadbase = map->l_addr;
	    }
	}
      elf_machine_rel (map, r, loadbase, definer);
    }
}

#undef elf_dynamic_do_rel
#undef Elf32_Rel
#undef elf_machine_rel