ports/sysdeps/unix/sysv/linux/m68k/bits/m68k-vdso.h

   1 /* Resolve function pointers to VDSO functions.
   2    Copyright (C) 2010-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
   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    <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #ifndef _M68K_VDSO_H
  22 #define _M68K_VDSO_H
  23
  24 #ifdef SHARED
  25
  26 # ifdef IS_IN_rtld
  27 # define M68K_VDSO_SYMBOL(name) __rtld_##name
  28 # define STR_M68K_VDSO_SYMBOL(name) "__rtld_" #name
  29 # else
  30 # define M68K_VDSO_SYMBOL(name) name
  31 # define STR_M68K_VDSO_SYMBOL(name) #name
  32 # endif
  33
  34 # ifndef __ASSEMBLER__
  35
  36 /* We define __rtld_* copies for rtld.
  37    We need them visible in libc to initialize.  */
  38 #  if defined IS_IN_rtld || !defined NOT_IN_libc
  39 extern void *__rtld___vdso_read_tp;
  40 extern void *__rtld___vdso_atomic_cmpxchg_32;
  41 extern void *__rtld___vdso_atomic_barrier;
  42
  43 /* These stubs are meant to be invoked only from the assembly.  */
  44 extern void __vdso_read_tp_stub (void);
  45 extern void __vdso_atomic_cmpxchg_32_stub (void);
  46 extern void __vdso_atomic_barrier_stub (void);
  47 #  endif /* IS_IN_rtld || !NOT_IN_libc */
  48
  49 /* RTLD should only use its own copies.  */
  50 #  ifndef IS_IN_rtld
  51 extern void *__vdso_read_tp;
  52 extern void *__vdso_atomic_cmpxchg_32;
  53 extern void *__vdso_atomic_barrier;
  54 #  endif /* !IS_IN_rtld */
  55
  56 # endif /* !__ASSEMBLER__ */
  57
  58 #endif /* SHARED */
  59
  60 #endif /* _M68K_VDSO_H */