Merge glibc-ports into ports/ directory.glibc-2.16-ports-merge

1 files changed, 73 insertions, 0 deletions

diff --git a/ports/sysdeps/unix/sysv/linux/m68k/init-first.c b/ports/sysdeps/unix/sysv/linux/m68k/init-first.c
new file mode 100644
index 0000000000..ec311ec427
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/m68k/init-first.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 2010 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 <bits/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 <sysdeps/unix/sysv/linux/init-first.c>