sysdeps/unix/sysv/linux/powerpc/init-first.c

   1 /* Initialization code run first thing by the ELF startup code.  Linux/PowerPC.
   2    Copyright (C) 2007-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dl-vdso.h>
  20 #include <libc-vdso.h>
  21
  22 unsigned long long (*VDSO_SYMBOL(get_tbfreq)) (void) attribute_hidden;
  23 #if defined(__PPC64__) || defined(__powerpc64__)
  24 void *VDSO_SYMBOL(sigtramp_rt64) attribute_hidden;
  25 #else
  26 void *VDSO_SYMBOL(sigtramp32) attribute_hidden;
  27 void *VDSO_SYMBOL(sigtramp_rt32) attribute_hidden;
  28 #endif
  29
  30 static inline void
  31 __libc_vdso_platform_setup_arch (void)
  32 {
  33   VDSO_SYMBOL (get_tbfreq) = get_vdso_mangle_symbol (HAVE_GET_TBFREQ);
  34
  35   /* PPC64 uses only one signal trampoline symbol, while PPC32 will use
  36      two depending if SA_SIGINFO is used (__kernel_sigtramp_rt32) or not
  37      (__kernel_sigtramp32).
  38      There is no need to pointer mangle these symbol because they will
  39      used only for pointer comparison.  */
  40 #if defined(__PPC64__) || defined(__powerpc64__)
  41   VDSO_SYMBOL(sigtramp_rt64) =  get_vdso_symbol (HAVE_SIGTRAMP_RT64);
  42 #else
  43   VDSO_SYMBOL(sigtramp32) = get_vdso_symbol (HAVE_SIGTRAMP_32);
  44   VDSO_SYMBOL(sigtramp_rt32) = get_vdso_symbol (HAVE_SIGTRAMP_RT32);
  45 #endif
  46 }
  47
  48 #define VDSO_SETUP_ARCH __libc_vdso_platform_setup_arch
  49
  50 #include <sysdeps/unix/sysv/linux/init-first.c>