1  /* Machine-dependent ELF indirect relocation inline functions.
       2     i386 version.
       3     Copyright (C) 2009-2023 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, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #ifndef _DL_IREL_H
      21  #define _DL_IREL_H
      22  
      23  #include <stdio.h>
      24  #include <unistd.h>
      25  
      26  #define ELF_MACHINE_IREL	1
      27  
      28  static inline Elf32_Addr
      29  __attribute ((always_inline))
      30  elf_ifunc_invoke (Elf32_Addr addr)
      31  {
      32    return ((Elf32_Addr (*) (void)) (addr)) ();
      33  }
      34  
      35  static inline void
      36  __attribute ((always_inline))
      37  elf_irel (const Elf32_Rel *reloc)
      38  {
      39    Elf32_Addr *const reloc_addr = (void *) reloc->r_offset;
      40    const unsigned long int r_type = ELF32_R_TYPE (reloc->r_info);
      41  
      42    if (__glibc_likely (r_type == R_386_IRELATIVE))
      43      {
      44        Elf32_Addr value = elf_ifunc_invoke(*reloc_addr);
      45        *reloc_addr = value;
      46      }
      47    else
      48      __libc_fatal ("Unexpected reloc type in static binary.\n");
      49  }
      50  
      51  #endif /* dl-irel.h */