sysdeps/x86_64/dl-irel.h

   1 /* Machine-dependent ELF indirect relocation inline functions.
   2    x86-64 version.
   3    Copyright (C) 2009 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _DL_IREL_H
  22 #define _DL_IREL_H
  23
  24 #include <stdio.h>
  25 #include <unistd.h>
  26
  27 #define ELF_MACHINE_IRELA       1
  28
  29 static inline void
  30 __attribute ((always_inline))
  31 elf_irela (const Elf64_Rela *reloc)
  32 {
  33   Elf64_Addr *const reloc_addr = (void *) reloc->r_offset;
  34   const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
  35
  36   if (__builtin_expect (r_type == R_X86_64_IRELATIVE, 1))
  37     {
  38       Elf64_Addr value = ((Elf64_Addr (*) (void)) reloc->r_addend) ();
  39       *reloc_addr = value;
  40     }
  41   else
  42     __libc_fatal ("unexpected reloc type in static binary");
  43 }
  44
  45 #endif /* dl-irel.h */