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

   1 /* Initialization code run first thing by the ELF startup code.  Linux/PowerPC.
   2    Copyright (C) 2007-2019 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 int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
  23   attribute_hidden;
  24 int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
  25 int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *);
  26 unsigned long long (*VDSO_SYMBOL(get_tbfreq)) (void);
  27 int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *);
  28 time_t (*VDSO_SYMBOL(time)) (time_t *);
  29
  30 #if defined(__PPC64__) || defined(__powerpc64__)
  31 void *VDSO_SYMBOL(sigtramp_rt64);
  32 #else
  33 void *VDSO_SYMBOL(sigtramp32);
  34 void *VDSO_SYMBOL(sigtramp_rt32);
  35 #endif
  36
  37 static inline void
  38 _libc_vdso_platform_setup (void)
  39 {
  40   PREPARE_VERSION_KNOWN (linux2615, LINUX_2_6_15);
  41
  42   void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
  43   PTR_MANGLE (p);
  44   VDSO_SYMBOL (gettimeofday) = p;
  45
  46   p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2615);
  47   PTR_MANGLE (p);
  48   VDSO_SYMBOL (clock_gettime) = p;
  49
  50   p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2615);
  51   PTR_MANGLE (p);
  52   VDSO_SYMBOL (clock_getres) = p;
  53
  54   p = _dl_vdso_vsym ("__kernel_get_tbfreq", &linux2615);
  55   PTR_MANGLE (p);
  56   VDSO_SYMBOL (get_tbfreq) = p;
  57
  58   p = _dl_vdso_vsym ("__kernel_getcpu", &linux2615);
  59   PTR_MANGLE (p);
  60   VDSO_SYMBOL (getcpu) = p;
  61
  62   p = _dl_vdso_vsym ("__kernel_time", &linux2615);
  63   PTR_MANGLE (p);
  64   VDSO_SYMBOL (time) = p;
  65
  66   /* PPC64 uses only one signal trampoline symbol, while PPC32 will use
  67      two depending if SA_SIGINFO is used (__kernel_sigtramp_rt32) or not
  68      (__kernel_sigtramp32).
  69      There is no need to pointer mangle these symbol because they will
  70      used only for pointer comparison.  */
  71 #if defined(__PPC64__) || defined(__powerpc64__)
  72   VDSO_SYMBOL(sigtramp_rt64) = _dl_vdso_vsym ("__kernel_sigtramp_rt64",
  73                                               &linux2615);
  74 #else
  75   VDSO_SYMBOL(sigtramp32) = _dl_vdso_vsym ("__kernel_sigtramp32", &linux2615);
  76   VDSO_SYMBOL(sigtramp_rt32) = _dl_vdso_vsym ("__kernel_sigtramp_rt32",
  77                                               &linux2615);
  78 #endif
  79 }
  80
  81 #define VDSO_SETUP _libc_vdso_platform_setup
  82
  83 #include <csu/init-first.c>