1 files changed, 86 insertions, 0 deletions
diff --git a/nptl/libc_pthread_init.c b/nptl/libc_pthread_init.c
new file mode 100644
index 0000000000..4d8d710cca
--- /dev/null
+++ b/nptl/libc_pthread_init.c
@@ -0,0 +1,86 @@
+/* Copyright (C) 2002-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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/>.  */
+
+#include <unistd.h>
+#include <list.h>
+#include <fork.h>
+#include <dl-sysdep.h>
+#include <tls.h>
+#include <string.h>
+#include <pthreadP.h>
+#include <bits/libc-lock.h>
+#include <sysdep.h>
+#include <ldsodefs.h>
+
+
+#ifdef TLS_MULTIPLE_THREADS_IN_TCB
+void
+#else
+extern int __libc_multiple_threads attribute_hidden;
+
+int *
+#endif
+__libc_pthread_init (ptr, reclaim, functions)
+     unsigned long int *ptr;
+     void (*reclaim) (void);
+     const struct pthread_functions *functions;
+{
+  /* Remember the pointer to the generation counter in libpthread.  */
+  __fork_generation_pointer = ptr;
+
+  /* Called by a child after fork.  */
+  __register_atfork (NULL, NULL, reclaim, NULL);
+
+#ifdef SHARED
+  /* Copy the function pointers into an array in libc.  This enables
+     access with just one memory reference but moreso, it prevents
+     hijacking the function pointers with just one pointer change.  We
+     "encrypt" the function pointers since we cannot write-protect the
+     array easily enough.  */
+  union ptrhack
+  {
+    struct pthread_functions pf;
+# define NPTRS (sizeof (struct pthread_functions) / sizeof (void *))
+    void *parr[NPTRS];
+  } __attribute__ ((may_alias)) const *src;
+  union ptrhack *dest;
+
+  src = (const void *) functions;
+  dest = (void *) &__libc_pthread_functions;
+
+  for (size_t cnt = 0; cnt < NPTRS; ++cnt)
+    {
+      void *p = src->parr[cnt];
+      PTR_MANGLE (p);
+      dest->parr[cnt] = p;
+    }
+  __libc_pthread_functions_init = 1;
+#endif
+
+#ifndef TLS_MULTIPLE_THREADS_IN_TCB
+  return &__libc_multiple_threads;
+#endif
+}
+
+#ifdef SHARED
+libc_freeres_fn (freeres_libptread)
+{
+  if (__libc_pthread_functions_init)
+    PTHFCT_CALL (ptr_freeres, ());
+}
+#endif