| /* Copyright (C) 2005-2018 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #if defined SHARED && !defined __powerpc64__ |
| # define __gettimeofday __redirect___gettimeofday |
| #else |
| # define __redirect___gettimeofday __gettimeofday |
| #endif |
| |
| #include <sys/time.h> |
| |
| #if defined(SHARED) && !defined(__clang__) |
| |
| # include <dl-vdso.h> |
| # include <libc-vdso.h> |
| # include <dl-machine.h> |
| |
| # ifndef __powerpc64__ |
| # undef __gettimeofday |
| |
| int |
| __gettimeofday_vsyscall (struct timeval *tv, struct timezone *tz) |
| { |
| return INLINE_VSYSCALL (gettimeofday, 2, tv, tz); |
| } |
| |
| /* __GI___gettimeofday is defined as hidden and for ppc32 it enables the |
| compiler make a local call (symbol@local) for internal GLIBC usage. It |
| means the PLT won't be used and the ifunc resolver will be called directly. |
| For ppc64 a call to a function in another translation unit might use a |
| different toc pointer thus disallowing direct branchess and making internal |
| ifuncs calls safe. */ |
| # undef libc_hidden_def |
| # define libc_hidden_def(name) \ |
| __hidden_ver1 (__gettimeofday_vsyscall, __GI___gettimeofday, \ |
| __gettimeofday_vsyscall); |
| |
| # endif /* !__powerpc64__ */ |
| |
| static int |
| __gettimeofday_syscall (struct timeval *tv, struct timezone *tz) |
| { |
| return INLINE_SYSCALL (gettimeofday, 2, tv, tz); |
| } |
| |
| # define INIT_ARCH() \ |
| PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565); \ |
| void *vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615); |
| |
| /* If the vDSO is not available we fall back syscall. */ |
| libc_ifunc_hidden (__redirect___gettimeofday, __gettimeofday, |
| vdso_gettimeofday |
| ? VDSO_IFUNC_RET (vdso_gettimeofday) |
| : (void *) __gettimeofday_syscall); |
| libc_hidden_def (__gettimeofday) |
| |
| #else |
| |
| # include <sysdep.h> |
| # include <errno.h> |
| |
| int |
| __gettimeofday (struct timeval *tv, struct timezone *tz) |
| { |
| return INLINE_SYSCALL (gettimeofday, 2, tv, tz); |
| } |
| libc_hidden_def (__gettimeofday) |
| |
| #endif |
| weak_alias (__gettimeofday, gettimeofday) |
| libc_hidden_weak (gettimeofday) |