Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 85 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/gettimeofday.c b/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/gettimeofday.c
new file mode 100644
index 0000000000..6f09fa20d3
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/powerpc/gettimeofday.c
@@ -0,0 +1,85 @@
+/* Copyright (C) 2005-2017 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>
+
+#ifdef SHARED
+
+# 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)