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author | Ulrich Drepper <drepper@redhat.com> | 2009-05-31 23:45:33 -0700 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2009-05-31 23:45:33 -0700 |
commit | 74414708355a922a514d5c76183eca6931c4488a (patch) | |
tree | 60dd084df2e9f02464f66b0da2068f4561856458 /sysdeps/x86_64/dl-irel.h | |
parent | 963cb6fcb47ca212c0c57cc57bd7510f6549579c (diff) | |
download | glibc-74414708355a922a514d5c76183eca6931c4488a.zip glibc-74414708355a922a514d5c76183eca6931c4488a.tar.gz glibc-74414708355a922a514d5c76183eca6931c4488a.tar.bz2 |
Finish IFUNC support for x86 and x86-64.
Add support for the IRELAIVE relocation and IFUNC in static executables.
Diffstat (limited to 'sysdeps/x86_64/dl-irel.h')
-rw-r--r-- | sysdeps/x86_64/dl-irel.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sysdeps/x86_64/dl-irel.h b/sysdeps/x86_64/dl-irel.h new file mode 100644 index 0000000..442ab71 --- /dev/null +++ b/sysdeps/x86_64/dl-irel.h @@ -0,0 +1,44 @@ +/* Machine-dependent ELF indirect relocation inline functions. + x86-64 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 <unistd.h> + +#define ELF_MACHINE_IRELA 1 + +static inline void +__attribute ((always_inline)) +elf_irela (const Elf64_Rela *reloc) +{ + Elf64_Addr *const reloc_addr = (void *) reloc->r_offset; + const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info); + + if (__builtin_expect (r_type == R_X86_64_IRELATIVE, 1)) + { + Elf64_Addr value = ((Elf64_Addr (*) (void)) reloc->r_addend) (); + *reloc_addr = value; + } + else + _exit (-1); +} + +#endif /* dl-irel.h */ |