glibc/sysdeps/i386/dl-irel.h
Jakub Jelinek 0212596218 libc part of prelink IFUNC support.
The dl-lookup.c changes are needed for prelink (support in prelink
checked into SVN, tested for both i?86 and x86-64), dl-irel.h just
something I discovered by code inspection.
2009-06-15 07:46:53 -07:00

46 lines
1.5 KiB
C

/* Machine-dependent ELF indirect relocation inline functions.
i386 version.
Copyright (C) 2009 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. */
#ifndef _DL_IREL_H
#define _DL_IREL_H
#include <stdio.h>
#include <unistd.h>
#define ELF_MACHINE_IREL 1
static inline void
__attribute ((always_inline))
elf_irel (const Elf32_Rel *reloc)
{
Elf32_Addr *const reloc_addr = (void *) reloc->r_offset;
const unsigned long int r_type = ELF32_R_TYPE (reloc->r_info);
if (__builtin_expect (r_type == R_386_IRELATIVE, 1))
{
Elf32_Addr value = ((Elf32_Addr (*) (void)) (*reloc_addr)) ();
*reloc_addr = value;
}
else
__libc_fatal ("unexpected reloc type in static binary");
}
#endif /* dl-irel.h */