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, 74 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/m68k/init-first.c b/REORG.TODO/sysdeps/unix/sysv/linux/m68k/init-first.c
new file mode 100644
index 0000000000..227dead30e
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/m68k/init-first.c
@@ -0,0 +1,74 @@
+/* Initialization code run first thing by the ELF startup code.  Linux/m68k.
+   Copyright (C) 2010-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
+
+   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/>.  */
+
+/* Note: linking in vDSO to a static binary requires changes to
+   the main GLIBC proper.  Not yet implemented.  */
+#ifdef SHARED
+
+#include <dl-vdso.h>
+#include <m68k-vdso.h>
+
+static inline void
+_libc_vdso_platform_setup (void)
+{
+  void *p;
+
+  PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
+
+  /* It may happen that rtld didn't initialize the vDSO, so fallback
+     to the syscall implementations if _dl_vdso_vsym returns NULL.
+     This may happen when a static executable dlopen's a dynamic library.
+     This really is nothing more than a workaround for rtld/csu
+     deficiency.  Ideally, init code would setup the vDSO for static
+     binaries too.  */
+
+  p = _dl_vdso_vsym ("__kernel_read_tp", &linux26);
+  if (p != NULL)
+    {
+      __vdso_read_tp = p;
+      __rtld___vdso_read_tp = p;
+    }
+  else
+    assert (__vdso_read_tp == (void *) __vdso_read_tp_stub);
+
+  p = _dl_vdso_vsym ("__kernel_atomic_cmpxchg_32", &linux26);
+  if (p != NULL)
+    {
+      __vdso_atomic_cmpxchg_32 = p;
+      __rtld___vdso_atomic_cmpxchg_32 = p;
+    }
+  else
+    assert (__vdso_atomic_cmpxchg_32
+	    == (void *) __vdso_atomic_cmpxchg_32_stub);
+
+  p = _dl_vdso_vsym ("__kernel_atomic_barrier", &linux26);
+  if (p != NULL)
+    {
+      __vdso_atomic_barrier = p;
+      __rtld___vdso_atomic_barrier = p;
+    }
+  else
+    assert (__vdso_atomic_barrier == (void *) __vdso_atomic_barrier_stub);
+}
+
+#define VDSO_SETUP _libc_vdso_platform_setup
+
+#endif /* SHARED */
+
+#include <csu/init-first.c>