glibc/sysdeps/hppa/dl-symaddr.c

/* Get the symbol address.  HPPA version.
   Copyright (C) 1999-2017 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, see
   <http://www.gnu.org/licenses/>.  */

#include <ldsodefs.h>
#include <dl-machine.h>

void *
_dl_symbol_address (struct link_map *map, const ElfW(Sym) *ref)
{
  /* Find the "ip" from the "map" and symbol "ref" */
  Elf32_Addr value = (map ? map->l_addr : 0) + ref->st_value;

  /* On hppa, we have to return the pointer to function descriptor.
     This involves an "| 2" to inform $$dyncall that this is a plabel32  */
  if (ELFW(ST_TYPE) (ref->st_info) == STT_FUNC){
    return (void *)((unsigned long)_dl_make_fptr (map, ref, value) | 2);
  }
  else
    return (void *) value;
}
rtld_hidden_def (_dl_symbol_address)