From 808cf7c45e187c1889867ac83d047abfdf81c7a3 Mon Sep 17 00:00:00 2001
From: xuhuijie <xuhuijie2@huawei.com>
Date: Fri, 14 Aug 2020 17:41:59 +0800
Subject: [PATCH] build extra lipthreadcond so
performance degradation in multi-core scenarios, here is an
extra libpthreadcond.so using old version of the function. you can use it by
adding LD_PRELOAD=./libpthreadcond.so in front of your program (eg: 
LD_PRELOAD=./libpthreadcond.so ./test). use with-libpthreadcond to compile
it. warning:2.17 version does not meet the posix standard, you should pay
attention when using it.
https://sourceware.org/git/?p=glibc.git;a=commit;h=ed19993b5b0d05d62cc883571519a67dae481a14

---
 nptl_2_17/Makefile                           |   52 + 
 nptl_2_17/bits/pthreadtypes_2_17.h           |  121 ++
 nptl_2_17/bits/thread-shared-types_2_17.h    |  104 ++
 nptl_2_17/build_libpthreadcondso.sh          |    9 +  
 nptl_2_17/cancellation_2_17.c                |  104 ++
 nptl_2_17/cleanup_compat_2_17.c              |   50 + 
 nptl_2_17/libpthreadcond-aarch64.map         |    8 +  
 nptl_2_17/libpthreadcond-x86_64.map          |    8 +  
 nptl_2_17/pthreadP_2_17.h                    |  620 +++++++++
 nptl_2_17/pthread_2_17.h                     | 1173 ++++++++++++++++++
 nptl_2_17/pthread_cond_broadcast_2_17.c      |   94 ++
 nptl_2_17/pthread_cond_destroy_2_17.c        |   85 ++
 nptl_2_17/pthread_cond_init_2_17.c           |   50 + 
 nptl_2_17/pthread_cond_signal_2_17.c         |   82 ++
 nptl_2_17/pthread_cond_timedwait_2_17.c      |  268 ++++ 
 nptl_2_17/pthread_cond_wait_2_17.c           |  231 ++++ 
 nptl_2_17/pthread_condattr_getclock_2_17.c   |   28 + 
 nptl_2_17/pthread_condattr_getpshared_2_17.c |   28 + 
 nptl_2_17/pthread_condattr_init_2_17.c       |   34 + 
 nptl_2_17/pthread_condattr_setclock_2_17.c   |   45 + 
 nptl_2_17/pthread_mutex_cond_lock_2_17.c     |   21 + 
 nptl_2_17/pthread_mutex_lock_2_17.c          |  628 ++++++++++
 nptl_2_17/pthread_mutex_unlock_2_17.c        |  360 ++++++
 nptl_2_17/pthreadtypes_2_17.h                |  179 +++
 nptl_2_17/tpp_2_17.c                         |  195 +++
 nptl_2_17/unwind_2_17.c                      |  138 +++
 nptl_2_17/vars_2_17.c                        |   43 + 
 27 files changed, 4758 insertions(+)
 create mode 100644 nptl_2_17/Makefile
 create mode 100644 nptl_2_17/bits/pthreadtypes_2_17.h
 create mode 100644 nptl_2_17/bits/thread-shared-types_2_17.h
 create mode 100644 nptl_2_17/build_libpthreadcondso.sh
 create mode 100644 nptl_2_17/cancellation_2_17.c
 create mode 100644 nptl_2_17/cleanup_compat_2_17.c
 create mode 100644 nptl_2_17/libpthreadcond-aarch64.map
 create mode 100644 nptl_2_17/libpthreadcond-x86_64.map
 create mode 100644 nptl_2_17/pthreadP_2_17.h
 create mode 100644 nptl_2_17/pthread_2_17.h
 create mode 100644 nptl_2_17/pthread_cond_broadcast_2_17.c
 create mode 100644 nptl_2_17/pthread_cond_destroy_2_17.c
 create mode 100644 nptl_2_17/pthread_cond_init_2_17.c
 create mode 100644 nptl_2_17/pthread_cond_signal_2_17.c
 create mode 100644 nptl_2_17/pthread_cond_timedwait_2_17.c
 create mode 100644 nptl_2_17/pthread_cond_wait_2_17.c
 create mode 100644 nptl_2_17/pthread_condattr_getclock_2_17.c
 create mode 100644 nptl_2_17/pthread_condattr_getpshared_2_17.c
 create mode 100644 nptl_2_17/pthread_condattr_init_2_17.c
 create mode 100644 nptl_2_17/pthread_condattr_setclock_2_17.c
 create mode 100644 nptl_2_17/pthread_mutex_cond_lock_2_17.c
 create mode 100644 nptl_2_17/pthread_mutex_lock_2_17.c
 create mode 100644 nptl_2_17/pthread_mutex_unlock_2_17.c
 create mode 100644 nptl_2_17/pthreadtypes_2_17.h
 create mode 100644 nptl_2_17/tpp_2_17.c
 create mode 100644 nptl_2_17/unwind_2_17.c
 create mode 100644 nptl_2_17/vars_2_17.c


diff --git a/nptl_2_17/Makefile b/nptl_2_17/Makefile
new file mode 100644
index 00000000..4c30c5f1
--- /dev/null
+++ b/nptl_2_17/Makefile
@@ -0,0 +1,52 @@
+include libpthreadcond_config
+subdir=libpthreadcond
+objdir=../$(build_dir)/
+
+
+ifdef subdir
+.. := ../
+endif
+
+objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
+common-objpfx = $(objdir)/
+common-objdir = $(objdir)
+
+sysdep_dir := $(..)sysdeps
+export sysdep_dir := $(sysdep_dir)
+
+include $(common-objpfx)soversions.mk
+include $(common-objpfx)config.make
+
+uses-callbacks = -fexceptions 
+
+sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
+
++sysdep_dirs = $(sysdirs)        
++sysdep_dirs := $(objdir) $(+sysdep_dirs)
+
++sysdep-includes := $(foreach dir,$(+sysdep_dirs), $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
+
+compile_obj = vars_2_17.os pthread_cond_wait_2_17.os pthread_cond_timedwait_2_17.os pthread_cond_signal_2_17.os pthread_cond_broadcast_2_17.os pthread_cond_init_2_17.os pthread_cond_destroy_2_17.os cleanup_compat_2_17.os unwind_2_17.os cancellation_2_17.os pthread_mutex_cond_lock_2_17.os pthread_mutex_lock_2_17.os pthread_mutex_unlock_2_17.os pthread_condattr_getclock_2_17.os pthread_condattr_getpshared_2_17.os pthread_condattr_init_2_17.os pthread_condattr_setclock_2_17.os tpp_2_17.os
+compile_obj_dir = $(foreach n,$(compile_obj),../$(build_dir)/nptl/$(n))
+
+exist_obj = lowlevellock.os lll_timedlock_wait.os pthread_mutex_conf.os
+ifeq (x86_64, $(arch))
+exist_obj += elision-lock.os elision-unlock.os elision-timed.os elision-trylock.os
+endif
+
+exist_obj_dir = $(foreach n,$(exist_obj),../$(build_dir)/nptl/$(n))
+
+CFLAGS = -c -std=gnu11 -fgnu89-inline -g -O2 -Wall -Wwrite-strings -Wundef -Werror -fmerge-all-constants -frounding-math -fno-stack-protector -Wstrict-prototypes -Wold-style-definition -fmath-errno -fPIC -ftls-model=initial-exec -DPIC -DSHARED -DTOP_NAMESPACE=glibc
+
+Headers = -I../include -I../$(build_dir)/nptl $(+sysdep-includes) -I../nptl_2_17 -I../nptl -I../libio -I../. -D_LIBC_REENTRANT -include ../$(build_dir)/libc-modules.h -include include/libc-symbols.h
+
+all: libpthreadcond.so
+
+libpthreadcond.so : $(compile_obj) libpthreadcond_pic.a
+	gcc -shared -static-libgcc -Wl,-O1  -Wl,-z,defs -Wl,-dynamic-linker=/usr/local/lib/$(ld.so-version) -B../$(build_dir)/csu/ -Wl,--version-script=libpthreadcond-$(arch).map -Wl,-soname=libpthreadcond.so.0 -Wl,-z,combreloc -Wl,-z,relro -Wl,--hash-style=both -L../$(build_dir) -L../$(build_dir)/math -L../$(build_dir)/elf -L../$(build_dir)/dlfcn -L../$(build_dir)/nss -L../$(build_dir)/nis -L../$(build_dir)/rt -L../$(build_dir)/resolv -L../$(build_dir)/mathvec -L../$(build_dir)/support -L../$(build_dir)/crypt -L../$(build_dir)/nptl -Wl,-rpath-link=../$(build_dir):../$(build_dir)/math:../$(build_dir)/elf:../$(build_dir)/dlfcn:../$(build_dir)/nss:../$(build_dir)/nis:../$(build_dir)/rt:../$(build_dir)/resolv:../$(build_dir)/mathvec:../$(build_dir)/support:../$(build_dir)/crypt:../$(build_dir)/nptl -o ../$(build_dir)/nptl/libpthreadcond.so ../$(build_dir)/csu/abi-note.o -Wl,--whole-archive ../$(build_dir)/nptl/libpthreadcond_pic.a -Wl,--no-whole-archive -Wl,--start-group ../$(build_dir)/libc.so ../$(build_dir)/libc_nonshared.a -Wl,--as-needed ../$(build_dir)/elf/ld.so -Wl,--no-as-needed -Wl,--end-group
+
+libpthreadcond_pic.a : $(compile_obj_dir) $(exist_obj_dir) 
+	ar cruv ../$(build_dir)/nptl/$@ $^
+		    
+$(compile_obj) : %.os : %.c
+	gcc $< $(CFLAGS) $(Headers) -o ../$(build_dir)/nptl/$@ -MD -MP -MF ../$(build_dir)/nptl/$@.dt -MT ../$(build_dir)/nptl/$@
diff --git a/nptl_2_17/bits/pthreadtypes_2_17.h b/nptl_2_17/bits/pthreadtypes_2_17.h
new file mode 100644
index 00000000..f501ea4c
--- /dev/null
+++ b/nptl_2_17/bits/pthreadtypes_2_17.h
@@ -0,0 +1,121 @@
+/* Declaration of common pthread types for all architectures.
+   Copyright (C) 2017-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _BITS_PTHREADTYPES_COMMON_H
+# define _BITS_PTHREADTYPES_COMMON_H	1
+
+/* For internal mutex and condition variable definitions.  */
+#include <bits/thread-shared-types_2_17.h>
+
+/* Thread identifiers.  The structure of the attribute type is not
+   exposed on purpose.  */
+typedef unsigned long int pthread_t;
+
+
+/* Data structures for mutex handling.  The structure of the attribute
+   type is not exposed on purpose.  */
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
+  int __align;
+} pthread_mutexattr_t;
+
+
+/* Data structure for condition variable handling.  The structure of
+   the attribute type is not exposed on purpose.  */
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_CONDATTR_T];
+  int __align;
+} pthread_condattr_t;
+
+
+/* Keys for thread-specific data */
+typedef unsigned int pthread_key_t;
+
+
+/* Once-only execution */
+typedef int __ONCE_ALIGNMENT pthread_once_t;
+
+
+union pthread_attr_t
+{
+  char __size[__SIZEOF_PTHREAD_ATTR_T];
+  long int __align;
+};
+#ifndef __have_pthread_attr_t
+typedef union pthread_attr_t pthread_attr_t;
+# define __have_pthread_attr_t 1
+#endif
+
+
+typedef union
+{
+  struct __pthread_mutex_s __data;
+  char __size[__SIZEOF_PTHREAD_MUTEX_T];
+  long int __align;
+} pthread_mutex_t;
+
+
+typedef union
+{
+  struct __pthread_cond_s __data;
+  char __size[__SIZEOF_PTHREAD_COND_T];
+  __extension__ long long int __align;
+} pthread_cond_t;
+
+
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K
+/* Data structure for reader-writer lock variable handling.  The
+   structure of the attribute type is deliberately not exposed.  */
+typedef union
+{
+  struct __pthread_rwlock_arch_t __data;
+  char __size[__SIZEOF_PTHREAD_RWLOCK_T];
+  long int __align;
+} pthread_rwlock_t;
+
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
+  long int __align;
+} pthread_rwlockattr_t;
+#endif
+
+
+#ifdef __USE_XOPEN2K
+/* POSIX spinlock data type.  */
+typedef volatile int pthread_spinlock_t;
+
+
+/* POSIX barriers data type.  The structure of the type is
+   deliberately not exposed.  */
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_BARRIER_T];
+  long int __align;
+} pthread_barrier_t;
+
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
+  int __align;
+} pthread_barrierattr_t;
+#endif
+
+#endif
diff --git a/nptl_2_17/bits/thread-shared-types_2_17.h b/nptl_2_17/bits/thread-shared-types_2_17.h
new file mode 100644
index 00000000..50e86261
--- /dev/null
+++ b/nptl_2_17/bits/thread-shared-types_2_17.h
@@ -0,0 +1,104 @@
+/* Common threading primitives definitions for both POSIX and C11.
+   Copyright (C) 2017-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _THREAD_SHARED_TYPES_H
+#define _THREAD_SHARED_TYPES_H 1
+
+/* Arch-specific definitions.  Each architecture must define the following
+   macros to define the expected sizes of pthread data types:
+
+   __SIZEOF_PTHREAD_ATTR_T        - size of pthread_attr_t.
+   __SIZEOF_PTHREAD_MUTEX_T       - size of pthread_mutex_t.
+   __SIZEOF_PTHREAD_MUTEXATTR_T   - size of pthread_mutexattr_t.
+   __SIZEOF_PTHREAD_COND_T        - size of pthread_cond_t.
+   __SIZEOF_PTHREAD_CONDATTR_T    - size of pthread_condattr_t.
+   __SIZEOF_PTHREAD_RWLOCK_T      - size of pthread_rwlock_t.
+   __SIZEOF_PTHREAD_RWLOCKATTR_T  - size of pthread_rwlockattr_t.
+   __SIZEOF_PTHREAD_BARRIER_T     - size of pthread_barrier_t.
+   __SIZEOF_PTHREAD_BARRIERATTR_T - size of pthread_barrierattr_t.
+
+   The additional macro defines any constraint for the lock alignment
+   inside the thread structures:
+
+   __LOCK_ALIGNMENT - for internal lock/futex usage.
+
+   Same idea but for the once locking primitive:
+
+   __ONCE_ALIGNMENT - for pthread_once_t/once_flag definition.  */
+
+#include <bits/pthreadtypes-arch.h>
+
+
+/* Common definition of pthread_mutex_t. */
+
+typedef struct __pthread_internal_list
+{
+  struct __pthread_internal_list *__prev;
+  struct __pthread_internal_list *__next;
+} __pthread_list_t;
+
+typedef struct __pthread_internal_slist
+{
+  struct __pthread_internal_slist *__next;
+} __pthread_slist_t;
+
+/* Arch-specific mutex definitions.  A generic implementation is provided
+   by sysdeps/nptl/bits/struct_mutex.h.  If required, an architecture
+   can override it by defining:
+
+   1. struct __pthread_mutex_s (used on both pthread_mutex_t and mtx_t
+      definition).  It should contains at least the internal members
+      defined in the generic version.
+
+   2. __LOCK_ALIGNMENT for any extra attribute for internal lock used with
+      atomic operations.
+
+   3. The macro __PTHREAD_MUTEX_INITIALIZER used for static initialization.
+      It should initialize the mutex internal flag.  */
+
+#include <bits/struct_mutex.h>
+
+/* Arch-sepecific read-write lock definitions.  A generic implementation is
+   provided by struct_rwlock.h.  If required, an architecture can override it
+   by defining:
+
+   1. struct __pthread_rwlock_arch_t (used on pthread_rwlock_t definition).
+      It should contain at least the internal members defined in the
+      generic version.
+
+   2. The macro __PTHREAD_RWLOCK_INITIALIZER used for static initialization.
+      It should initialize the rwlock internal type.  */
+
+#include <bits/struct_rwlock.h>
+
+
+/* Common definition of pthread_cond_t. */
+
+struct __pthread_cond_s
+{
+    int __lock;
+    unsigned int __futex;
+    __extension__ unsigned long long int __total_seq;
+    __extension__ unsigned long long int __wakeup_seq;
+    __extension__ unsigned long long int __woken_seq;
+    void *__mutex;
+    unsigned int __nwaiters;
+    unsigned int __broadcast_seq; 
+};
+
+#endif /* _THREAD_SHARED_TYPES_H  */
diff --git a/nptl_2_17/build_libpthreadcondso.sh b/nptl_2_17/build_libpthreadcondso.sh
new file mode 100644
index 00000000..6997277b
--- /dev/null
+++ b/nptl_2_17/build_libpthreadcondso.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+build_arch=$1
+build_dir=$2
+config_dir=libpthreadcond_config
+
+echo arch=${build_arch} > ${config_dir}
+echo build_dir=${build_dir} >> ${config_dir}
+make
+rm -rf ${config_dir}
diff --git a/nptl_2_17/cancellation_2_17.c b/nptl_2_17/cancellation_2_17.c
new file mode 100644
index 00000000..644d83bf
--- /dev/null
+++ b/nptl_2_17/cancellation_2_17.c
@@ -0,0 +1,104 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+#include <setjmp.h>
+#include <stdlib.h>
+#include <futex-internal.h>
+
+
+/* The next two functions are similar to pthread_setcanceltype() but
+   more specialized for the use in the cancelable functions like write().
+   They do not need to check parameters etc.  These functions must be
+   AS-safe, with the exception of the actual cancellation, because they
+   are called by wrappers around AS-safe functions like write().*/
+int
+attribute_hidden
+__pthread_enable_asynccancel (void)
+{
+  struct pthread *self = THREAD_SELF;
+  int oldval = THREAD_GETMEM (self, cancelhandling);
+
+  while (1)
+    {
+      int newval = oldval | CANCELTYPE_BITMASK;
+
+      if (newval == oldval)
+	break;
+
+      int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, newval,
+					      oldval);
+      if (__glibc_likely (curval == oldval))
+	{
+	  if (CANCEL_ENABLED_AND_CANCELED_AND_ASYNCHRONOUS (newval))
+	    {
+	      THREAD_SETMEM (self, result, PTHREAD_CANCELED);
+	      __do_cancel ();
+	    }
+
+	  break;
+	}
+
+      /* Prepare the next round.  */
+      oldval = curval;
+    }
+
+  return oldval;
+}
+
+/* See the comment for __pthread_enable_asynccancel regarding
+   the AS-safety of this function.  */
+void
+attribute_hidden
+__pthread_disable_asynccancel (int oldtype)
+{
+  /* If asynchronous cancellation was enabled before we do not have
+     anything to do.  */
+  if (oldtype & CANCELTYPE_BITMASK)
+    return;
+
+  struct pthread *self = THREAD_SELF;
+  int newval;
+
+  int oldval = THREAD_GETMEM (self, cancelhandling);
+
+  while (1)
+    {
+      newval = oldval & ~CANCELTYPE_BITMASK;
+
+      int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, newval,
+					      oldval);
+      if (__glibc_likely (curval == oldval))
+	break;
+
+      /* Prepare the next round.  */
+      oldval = curval;
+    }
+
+  /* We cannot return when we are being canceled.  Upon return the
+     thread might be things which would have to be undone.  The
+     following loop should loop until the cancellation signal is
+     delivered.  */
+  while (__builtin_expect ((newval & (CANCELING_BITMASK | CANCELED_BITMASK))
+			   == CANCELING_BITMASK, 0))
+    {
+      futex_wait_simple ((unsigned int *) &self->cancelhandling, newval,
+			 FUTEX_PRIVATE);
+      newval = THREAD_GETMEM (self, cancelhandling);
+    }
+}
diff --git a/nptl_2_17/cleanup_compat_2_17.c b/nptl_2_17/cleanup_compat_2_17.c
new file mode 100644
index 00000000..ccc55836
--- /dev/null
+++ b/nptl_2_17/cleanup_compat_2_17.c
@@ -0,0 +1,50 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include "pthreadP_2_17.h"
+
+
+void
+_pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
+		       void (*routine) (void *), void *arg)
+{
+  struct pthread *self = THREAD_SELF;
+
+  buffer->__routine = routine;
+  buffer->__arg = arg;
+  buffer->__prev = THREAD_GETMEM (self, cleanup);
+
+  THREAD_SETMEM (self, cleanup, buffer);
+}
+strong_alias (_pthread_cleanup_push, __pthread_cleanup_push)
+
+
+void
+_pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer, int execute)
+{
+  struct pthread *self __attribute ((unused)) = THREAD_SELF;
+
+  THREAD_SETMEM (self, cleanup, buffer->__prev);
+
+  /* If necessary call the cleanup routine after we removed the
+     current cleanup block from the list.  */
+  if (execute)
+    buffer->__routine (buffer->__arg);
+}
+strong_alias (_pthread_cleanup_pop, __pthread_cleanup_pop)
diff --git a/nptl_2_17/libpthreadcond-aarch64.map b/nptl_2_17/libpthreadcond-aarch64.map
new file mode 100644
index 00000000..d970af06
--- /dev/null
+++ b/nptl_2_17/libpthreadcond-aarch64.map
@@ -0,0 +1,8 @@
+GLIBC_2.17 {
+  global:
+    pthread_cond_init; pthread_cond_destroy;
+    pthread_cond_signal; pthread_cond_broadcast;
+    pthread_cond_wait; pthread_cond_timedwait;
+  local:
+    *;
+};
diff --git a/nptl_2_17/libpthreadcond-x86_64.map b/nptl_2_17/libpthreadcond-x86_64.map
new file mode 100644
index 00000000..d7f23322
--- /dev/null
+++ b/nptl_2_17/libpthreadcond-x86_64.map
@@ -0,0 +1,8 @@
+GLIBC_2.3.2 {
+  global:
+    pthread_cond_init; pthread_cond_destroy;
+    pthread_cond_signal; pthread_cond_broadcast;
+    pthread_cond_wait; pthread_cond_timedwait;
+  local:
+    *;
+};
diff --git a/nptl_2_17/pthreadP_2_17.h b/nptl_2_17/pthreadP_2_17.h
new file mode 100644
index 00000000..e195221a
--- /dev/null
+++ b/nptl_2_17/pthreadP_2_17.h
@@ -0,0 +1,620 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _PTHREADP_H
+#define _PTHREADP_H	1
+
+#include <pthread_2_17.h>
+#include <setjmp.h>
+#include <stdbool.h>
+#include <sys/syscall.h>
+#include "descr.h"
+#include <tls.h>
+#include <lowlevellock.h>
+#include <stackinfo.h>
+#include <internaltypes.h>
+#include <pthread-functions.h>
+#include <atomic.h>
+#include <kernel-features.h>
+#include <errno.h>
+#include <internal-signals.h>
+#include "pthread_mutex_conf.h"
+
+
+/* Atomic operations on TLS memory.  */
+#ifndef THREAD_ATOMIC_CMPXCHG_VAL
+# define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
+  atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
+#endif
+
+#ifndef THREAD_ATOMIC_BIT_SET
+# define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
+  atomic_bit_set (&(descr)->member, bit)
+#endif
+
+
+static inline short max_adaptive_count (void)
+{
+#if HAVE_TUNABLES
+  return __mutex_aconf.spin_count;
+#else
+  return DEFAULT_ADAPTIVE_COUNT;
+#endif
+}
+
+
+/* Magic cookie representing robust mutex with dead owner.  */
+#define PTHREAD_MUTEX_INCONSISTENT	INT_MAX
+/* Magic cookie representing not recoverable robust mutex.  */
+#define PTHREAD_MUTEX_NOTRECOVERABLE	(INT_MAX - 1)
+
+#define COND_NWAITERS_SHIFT    1
+
+/* Internal mutex type value.  */
+enum
+{
+  PTHREAD_MUTEX_KIND_MASK_NP = 3,
+
+  PTHREAD_MUTEX_ELISION_NP    = 256,
+  PTHREAD_MUTEX_NO_ELISION_NP = 512,
+
+  PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,
+  PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
+  = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,
+  PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
+  = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
+  PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
+  = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
+  PTHREAD_MUTEX_PRIO_INHERIT_NP = 32,
+  PTHREAD_MUTEX_PI_NORMAL_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL,
+  PTHREAD_MUTEX_PI_RECURSIVE_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
+  PTHREAD_MUTEX_PI_ERRORCHECK_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
+  PTHREAD_MUTEX_PI_ADAPTIVE_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
+  PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP,
+  PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP,
+  PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
+  PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
+  = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
+  PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
+  PTHREAD_MUTEX_PP_NORMAL_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
+  PTHREAD_MUTEX_PP_RECURSIVE_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
+  PTHREAD_MUTEX_PP_ERRORCHECK_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
+  PTHREAD_MUTEX_PP_ADAPTIVE_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
+  PTHREAD_MUTEX_ELISION_FLAGS_NP
+  = PTHREAD_MUTEX_ELISION_NP | PTHREAD_MUTEX_NO_ELISION_NP,
+
+  PTHREAD_MUTEX_TIMED_ELISION_NP =
+	  PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_ELISION_NP,
+  PTHREAD_MUTEX_TIMED_NO_ELISION_NP =
+	  PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_NO_ELISION_NP,
+};
+#define PTHREAD_MUTEX_PSHARED_BIT 128
+
+/* See concurrency notes regarding __kind in struct __pthread_mutex_s
+   in sysdeps/nptl/bits/thread-shared-types.h.  */
+#define PTHREAD_MUTEX_TYPE(m) \
+  (atomic_load_relaxed (&((m)->__data.__kind)) & 127)
+/* Don't include NO_ELISION, as that type is always the same
+   as the underlying lock type.  */
+#define PTHREAD_MUTEX_TYPE_ELISION(m) \
+  (atomic_load_relaxed (&((m)->__data.__kind))	\
+   & (127 | PTHREAD_MUTEX_ELISION_NP))
+
+#if LLL_PRIVATE == 0 && LLL_SHARED == 128
+# define PTHREAD_MUTEX_PSHARED(m) \
+  (atomic_load_relaxed (&((m)->__data.__kind)) & 128)
+#else
+# define PTHREAD_MUTEX_PSHARED(m) \
+  ((atomic_load_relaxed (&((m)->__data.__kind)) & 128)	\
+   ? LLL_SHARED : LLL_PRIVATE)
+#endif
+
+/* The kernel when waking robust mutexes on exit never uses
+   FUTEX_PRIVATE_FLAG FUTEX_WAKE.  */
+#define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED
+
+/* Ceiling in __data.__lock.  __data.__lock is signed, so don't
+   use the MSB bit in there, but in the mask also include that bit,
+   so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
+   masking if the value is then shifted down by
+   PTHREAD_MUTEX_PRIO_CEILING_SHIFT.  */
+#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT	19
+#define PTHREAD_MUTEX_PRIO_CEILING_MASK		0xfff80000
+
+
+/* Flags in mutex attr.  */
+#define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT	28
+#define PTHREAD_MUTEXATTR_PROTOCOL_MASK		0x30000000
+#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT	12
+#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK	0x00fff000
+#define PTHREAD_MUTEXATTR_FLAG_ROBUST		0x40000000
+#define PTHREAD_MUTEXATTR_FLAG_PSHARED		0x80000000
+#define PTHREAD_MUTEXATTR_FLAG_BITS \
+  (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
+   | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
+
+
+/* For the following, see pthread_rwlock_common.c.  */
+#define PTHREAD_RWLOCK_WRPHASE		1
+#define PTHREAD_RWLOCK_WRLOCKED		2
+#define PTHREAD_RWLOCK_RWAITING		4
+#define PTHREAD_RWLOCK_READER_SHIFT	3
+#define PTHREAD_RWLOCK_READER_OVERFLOW	((unsigned int) 1 \
+					 << (sizeof (unsigned int) * 8 - 1))
+#define PTHREAD_RWLOCK_WRHANDOVER	((unsigned int) 1 \
+					 << (sizeof (unsigned int) * 8 - 1))
+#define PTHREAD_RWLOCK_FUTEX_USED	2
+
+
+/* Bits used in robust mutex implementation.  */
+#define FUTEX_WAITERS		0x80000000
+#define FUTEX_OWNER_DIED	0x40000000
+#define FUTEX_TID_MASK		0x3fffffff
+
+
+/* pthread_once definitions.  See __pthread_once for how these are used.  */
+#define __PTHREAD_ONCE_INPROGRESS	1
+#define __PTHREAD_ONCE_DONE		2
+#define __PTHREAD_ONCE_FORK_GEN_INCR	4
+
+/* Attribute to indicate thread creation was issued from C11 thrd_create.  */
+#define ATTR_C11_THREAD ((void*)(uintptr_t)-1)
+
+#if 0
+/* Condition variable definitions.  See __pthread_cond_wait_common.
+   Need to be defined here so there is one place from which
+   nptl_lock_constants can grab them.  */
+#define __PTHREAD_COND_CLOCK_MONOTONIC_MASK 2
+#define __PTHREAD_COND_SHARED_MASK 1
+#endif
+
+/* Internal variables.  */
+
+
+/* Default pthread attributes.  */
+extern struct pthread_attr __default_pthread_attr attribute_hidden;
+extern int __default_pthread_attr_lock attribute_hidden;
+
+/* Size and alignment of static TLS block.  */
+extern size_t __static_tls_size attribute_hidden;
+extern size_t __static_tls_align_m1 attribute_hidden;
+
+/* Flag whether the machine is SMP or not.  */
+extern int __is_smp attribute_hidden;
+
+/* Thread descriptor handling.  */
+extern list_t __stack_user;
+hidden_proto (__stack_user)
+
+/* Attribute handling.  */
+extern struct pthread_attr *__attr_list attribute_hidden;
+extern int __attr_list_lock attribute_hidden;
+
+/* Concurrency handling.  */
+extern int __concurrency_level attribute_hidden;
+
+/* Thread-local data key handling.  */
+extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
+hidden_proto (__pthread_keys)
+
+/* Number of threads running.  */
+extern unsigned int __nptl_nthreads attribute_hidden;
+
+#ifndef __ASSUME_SET_ROBUST_LIST
+/* Negative if we do not have the system call and we can use it.  */
+extern int __set_robust_list_avail attribute_hidden;
+#endif
+
+/* Thread Priority Protection.  */
+extern int __sched_fifo_min_prio attribute_hidden;
+extern int __sched_fifo_max_prio attribute_hidden;
+extern void __init_sched_fifo_prio (void) attribute_hidden;
+extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
+     attribute_hidden;
+extern int __pthread_current_priority (void) attribute_hidden;
+
+/* The library can run in debugging mode where it performs a lot more
+   tests.  */
+extern int __pthread_debug attribute_hidden;
+/** For now disable debugging support.  */
+#if 0
+# define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
+# define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
+# define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
+#else
+# define DEBUGGING_P 0
+/* Simplified test.  This will not catch all invalid descriptors but
+   is better than nothing.  And if the test triggers the thread
+   descriptor is guaranteed to be invalid.  */
+# define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
+# define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
+#endif
+
+
+/* Cancellation test.  */
+#define CANCELLATION_P(self) \
+  do {									      \
+    int cancelhandling = THREAD_GETMEM (self, cancelhandling);		      \
+    if (CANCEL_ENABLED_AND_CANCELED (cancelhandling))			      \
+      {									      \
+	THREAD_SETMEM (self, result, PTHREAD_CANCELED);			      \
+	__do_cancel ();							      \
+      }									      \
+  } while (0)
+
+
+extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
+     __cleanup_fct_attribute __attribute ((__noreturn__))
+     ;
+extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
+     __cleanup_fct_attribute __attribute ((__noreturn__))
+#ifndef SHARED
+     weak_function
+#endif
+     ;
+extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
+     __cleanup_fct_attribute;
+extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
+     __cleanup_fct_attribute;
+hidden_proto (__pthread_unwind)
+hidden_proto (__pthread_unwind_next)
+hidden_proto (__pthread_register_cancel)
+hidden_proto (__pthread_unregister_cancel)
+# ifdef SHARED
+extern void attribute_hidden pthread_cancel_init (void);
+# endif
+extern void __nptl_unwind_freeres (void) attribute_hidden;
+
+/* Called when a thread reacts on a cancellation request.  */
+static inline void
+__attribute ((noreturn, always_inline))
+__do_cancel (void)
+{
+  struct pthread *self = THREAD_SELF;
+
+  /* Make sure we get no more cancellations.  */
+  THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
+
+  __pthread_unwind ((__pthread_unwind_buf_t *)
+		    THREAD_GETMEM (self, cleanup_jmp_buf));
+}
+
+
+/* Internal prototypes.  */
+
+/* Thread list handling.  */
+extern struct pthread *__find_in_stack_list (struct pthread *pd)
+     attribute_hidden;
+
+/* Deallocate a thread's stack after optionally making sure the thread
+   descriptor is still valid.  */
+extern void __free_tcb (struct pthread *pd) attribute_hidden;
+
+/* Free allocated stack.  */
+extern void __deallocate_stack (struct pthread *pd) attribute_hidden;
+
+/* Mark all the stacks except for the current one as available.  This
+   function also re-initializes the lock for the stack cache.  */
+extern void __reclaim_stacks (void) attribute_hidden;
+
+/* Make all threads's stacks executable.  */
+extern int __make_stacks_executable (void **stack_endp) attribute_hidden;
+
+/* longjmp handling.  */
+extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
+hidden_proto (__pthread_cleanup_upto)
+
+
+/* Functions with versioned interfaces.  */
+extern int __pthread_create_2_1 (pthread_t *newthread,
+				 const pthread_attr_t *attr,
+				 void *(*start_routine) (void *), void *arg);
+extern int __pthread_create_2_0 (pthread_t *newthread,
+				 const pthread_attr_t *attr,
+				 void *(*start_routine) (void *), void *arg);
+extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
+extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
+
+
+/* Event handlers for libthread_db interface.  */
+extern void __nptl_create_event (void);
+extern void __nptl_death_event (void);
+hidden_proto (__nptl_create_event)
+hidden_proto (__nptl_death_event)
+
+/* Register the generation counter in the libpthread with the libc.  */
+#ifdef TLS_MULTIPLE_THREADS_IN_TCB
+extern void __libc_pthread_init (unsigned long int *ptr,
+				 void (*reclaim) (void),
+				 const struct pthread_functions *functions);
+#else
+extern int *__libc_pthread_init (unsigned long int *ptr,
+				 void (*reclaim) (void),
+				 const struct pthread_functions *functions);
+
+/* Variable set to a nonzero value either if more than one thread runs or ran,
+   or if a single-threaded process is trying to cancel itself.  See
+   nptl/descr.h for more context on the single-threaded process case.  */
+extern int __pthread_multiple_threads attribute_hidden;
+/* Pointer to the corresponding variable in libc.  */
+extern int *__libc_multiple_threads_ptr attribute_hidden;
+#endif
+
+extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
+
+extern size_t __pthread_get_minstack (const pthread_attr_t *attr);
+
+/* Namespace save aliases.  */
+extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
+				    struct sched_param *param);
+extern int __pthread_setschedparam (pthread_t thread_id, int policy,
+				    const struct sched_param *param);
+extern int __pthread_setcancelstate (int state, int *oldstate);
+extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
+				 const pthread_mutexattr_t *__mutexattr);
+extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
+extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_timedlock (pthread_mutex_t *__mutex,
+     const struct timespec *__abstime);
+extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
+     attribute_hidden;
+extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t *__mutex)
+     attribute_hidden;
+extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
+					   int __decr) attribute_hidden;
+extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
+extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
+extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
+extern int __pthread_attr_destroy (pthread_attr_t *attr);
+extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
+					  int *detachstate);
+extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
+					  int detachstate);
+extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
+					   int *inherit);
+extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
+extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
+					 struct sched_param *param);
+extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
+					 const struct sched_param *param);
+extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
+					  int *policy);
+extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
+extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
+extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
+extern int __pthread_attr_getstackaddr (const pthread_attr_t *__restrict
+					__attr, void **__restrict __stackaddr);
+extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
+					void *__stackaddr);
+extern int __pthread_attr_getstacksize (const pthread_attr_t *__restrict
+					__attr,
+					size_t *__restrict __stacksize);
+extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
+					size_t __stacksize);
+extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr,
+				    void **__restrict __stackaddr,
+				    size_t *__restrict __stacksize);
+extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
+				    size_t __stacksize);
+extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
+				  const pthread_rwlockattr_t *__restrict
+				  __attr);
+extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
+extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
+extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
+extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
+extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
+extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
+extern int __pthread_cond_broadcast (pthread_cond_t *cond);
+extern int __pthread_cond_destroy (pthread_cond_t *cond);
+extern int __pthread_cond_init (pthread_cond_t *cond,
+				const pthread_condattr_t *cond_attr);
+extern int __pthread_cond_signal (pthread_cond_t *cond);
+extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
+extern int __pthread_cond_timedwait (pthread_cond_t *cond,
+				     pthread_mutex_t *mutex,
+				     const struct timespec *abstime);
+extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
+extern int __pthread_condattr_init (pthread_condattr_t *attr);
+extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
+extern int __pthread_key_delete (pthread_key_t key);
+extern void *__pthread_getspecific (pthread_key_t key);
+extern int __pthread_setspecific (pthread_key_t key, const void *value);
+extern int __pthread_once (pthread_once_t *once_control,
+			   void (*init_routine) (void));
+extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
+			     void (*child) (void));
+extern pthread_t __pthread_self (void);
+extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
+extern int __pthread_detach (pthread_t th);
+extern int __pthread_cancel (pthread_t th);
+extern int __pthread_kill (pthread_t threadid, int signo);
+extern void __pthread_exit (void *value) __attribute__ ((__noreturn__));
+extern int __pthread_join (pthread_t threadid, void **thread_return);
+extern int __pthread_setcanceltype (int type, int *oldtype);
+extern int __pthread_enable_asynccancel (void) attribute_hidden;
+extern void __pthread_disable_asynccancel (int oldtype) attribute_hidden;
+extern void __pthread_testcancel (void);
+extern int __pthread_clockjoin_ex (pthread_t, void **, clockid_t,
+				   const struct timespec *, bool)
+  attribute_hidden;
+
+
+hidden_proto (__pthread_mutex_init)
+hidden_proto (__pthread_mutex_destroy)
+hidden_proto (__pthread_mutex_lock)
+hidden_proto (__pthread_mutex_trylock)
+hidden_proto (__pthread_mutex_unlock)
+hidden_proto (__pthread_rwlock_rdlock)
+hidden_proto (__pthread_rwlock_wrlock)
+hidden_proto (__pthread_rwlock_unlock)
+hidden_proto (__pthread_key_create)
+hidden_proto (__pthread_getspecific)
+hidden_proto (__pthread_setspecific)
+hidden_proto (__pthread_once)
+hidden_proto (__pthread_setcancelstate)
+hidden_proto (__pthread_testcancel)
+hidden_proto (__pthread_mutexattr_init)
+hidden_proto (__pthread_mutexattr_settype)
+
+extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
+extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
+extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
+				    const pthread_condattr_t *cond_attr);
+extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
+extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
+					 pthread_mutex_t *mutex,
+					 const struct timespec *abstime);
+extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
+				    pthread_mutex_t *mutex);
+
+extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
+				     cpu_set_t *cpuset);
+
+/* Special versions which use non-exported functions.  */
+extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
+				    void (*routine) (void *), void *arg)
+     attribute_hidden;
+
+/* Replace cleanup macros defined in <pthread.h> with internal
+   versions that don't depend on unwind info and better support
+   cancellation.  */
+# undef pthread_cleanup_push
+# define pthread_cleanup_push(routine,arg)              \
+  { struct _pthread_cleanup_buffer _buffer;             \
+  __pthread_cleanup_push (&_buffer, (routine), (arg));
+
+extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
+				   int execute) attribute_hidden;
+# undef pthread_cleanup_pop
+# define pthread_cleanup_pop(execute)                   \
+  __pthread_cleanup_pop (&_buffer, (execute)); }
+
+extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
+					  void (*routine) (void *), void *arg);
+extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
+					   int execute);
+
+/* Old cleanup interfaces, still used in libc.so.  */
+extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
+				   void (*routine) (void *), void *arg);
+extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
+				  int execute);
+extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
+					 void (*routine) (void *), void *arg);
+extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
+					  int execute);
+
+extern void __nptl_deallocate_tsd (void) attribute_hidden;
+
+extern void __nptl_setxid_error (struct xid_command *cmdp, int error)
+  attribute_hidden;
+extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
+#ifndef SHARED
+extern void __nptl_set_robust (struct pthread *self);
+#endif
+
+extern void __nptl_stacks_freeres (void) attribute_hidden;
+extern void __shm_directory_freeres (void) attribute_hidden;
+
+extern void __wait_lookup_done (void) attribute_hidden;
+
+#ifdef SHARED
+# define PTHREAD_STATIC_FN_REQUIRE(name)
+#else
+# define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
+#endif
+
+/* Test if the mutex is suitable for the FUTEX_WAIT_REQUEUE_PI operation.  */
+#if (defined lll_futex_wait_requeue_pi \
+		     && defined __ASSUME_REQUEUE_PI)
+# define USE_REQUEUE_PI(mut) \
+	   ((mut) && (mut) != (void *) ~0l \
+	        && (((mut)->__data.__kind \
+				         & (PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP)) \
+					         == PTHREAD_MUTEX_PRIO_INHERIT_NP))
+#else
+# define USE_REQUEUE_PI(mut) 0
+#endif
+
+/* Returns 0 if POL is a valid scheduling policy.  */
+static inline int
+check_sched_policy_attr (int pol)
+{
+  if (pol == SCHED_OTHER || pol == SCHED_FIFO || pol == SCHED_RR)
+    return 0;
+
+  return EINVAL;
+}
+
+/* Returns 0 if PR is within the accepted range of priority values for
+   the scheduling policy POL or EINVAL otherwise.  */
+static inline int
+check_sched_priority_attr (int pr, int pol)
+{
+  int min = __sched_get_priority_min (pol);
+  int max = __sched_get_priority_max (pol);
+
+  if (min >= 0 && max >= 0 && pr >= min && pr <= max)
+    return 0;
+
+  return EINVAL;
+}
+
+/* Returns 0 if ST is a valid stack size for a thread stack and EINVAL
+   otherwise.  */
+static inline int
+check_stacksize_attr (size_t st)
+{
+  if (st >= PTHREAD_STACK_MIN)
+    return 0;
+
+  return EINVAL;
+}
+
+#define ASSERT_TYPE_SIZE(type, size) 					\
+  _Static_assert (sizeof (type) == size,				\
+		  "sizeof (" #type ") != " #size)
+
+#define ASSERT_PTHREAD_INTERNAL_SIZE(type, internal) 			\
+  _Static_assert (sizeof ((type) { { 0 } }).__size >= sizeof (internal),\
+		  "sizeof (" #type ".__size) < sizeof (" #internal ")")
+
+#define ASSERT_PTHREAD_STRING(x) __STRING (x)
+#define ASSERT_PTHREAD_INTERNAL_OFFSET(type, member, offset)		\
+  _Static_assert (offsetof (type, member) == offset,			\
+		  "offset of " #member " field of " #type " != "	\
+		  ASSERT_PTHREAD_STRING (offset))
+#define ASSERT_PTHREAD_INTERNAL_MEMBER_SIZE(type, member, mtype)	\
+  _Static_assert (sizeof (((type) { 0 }).member) != 8,	\
+		  "sizeof (" #type "." #member ") != sizeof (" #mtype "))")
+
+#endif	/* pthreadP.h */
diff --git a/nptl_2_17/pthread_2_17.h b/nptl_2_17/pthread_2_17.h
new file mode 100644
index 00000000..3954770a
--- /dev/null
+++ b/nptl_2_17/pthread_2_17.h
@@ -0,0 +1,1173 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _PTHREAD_H
+#define _PTHREAD_H	1
+
+#include <features.h>
+#include <sched.h>
+#include <time.h>
+
+#include <bits/endian.h>
+#include <bits/pthreadtypes_2_17.h>
+#include <bits/setjmp.h>
+#include <bits/wordsize.h>
+#include <bits/types/struct_timespec.h>
+
+
+/* Detach state.  */
+enum
+{
+  PTHREAD_CREATE_JOINABLE,
+#define PTHREAD_CREATE_JOINABLE	PTHREAD_CREATE_JOINABLE
+  PTHREAD_CREATE_DETACHED
+#define PTHREAD_CREATE_DETACHED	PTHREAD_CREATE_DETACHED
+};
+
+
+/* Mutex types.  */
+enum
+{
+  PTHREAD_MUTEX_TIMED_NP,
+  PTHREAD_MUTEX_RECURSIVE_NP,
+  PTHREAD_MUTEX_ERRORCHECK_NP,
+  PTHREAD_MUTEX_ADAPTIVE_NP
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
+  ,
+  PTHREAD_MUTEX_NORMAL = PTHREAD_MUTEX_TIMED_NP,
+  PTHREAD_MUTEX_RECURSIVE = PTHREAD_MUTEX_RECURSIVE_NP,
+  PTHREAD_MUTEX_ERRORCHECK = PTHREAD_MUTEX_ERRORCHECK_NP,
+  PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL
+#endif
+#ifdef __USE_GNU
+  /* For compatibility.  */
+  , PTHREAD_MUTEX_FAST_NP = PTHREAD_MUTEX_TIMED_NP
+#endif
+};
+
+
+#ifdef __USE_XOPEN2K
+/* Robust mutex or not flags.  */
+enum
+{
+  PTHREAD_MUTEX_STALLED,
+  PTHREAD_MUTEX_STALLED_NP = PTHREAD_MUTEX_STALLED,
+  PTHREAD_MUTEX_ROBUST,
+  PTHREAD_MUTEX_ROBUST_NP = PTHREAD_MUTEX_ROBUST
+};
+#endif
+
+
+#if defined __USE_POSIX199506 || defined __USE_UNIX98
+/* Mutex protocols.  */
+enum
+{
+  PTHREAD_PRIO_NONE,
+  PTHREAD_PRIO_INHERIT,
+  PTHREAD_PRIO_PROTECT
+};
+#endif
+
+
+#define PTHREAD_MUTEX_INITIALIZER \
+ { {  __PTHREAD_MUTEX_INITIALIZER (PTHREAD_MUTEX_TIMED_NP) } }
+#ifdef __USE_GNU
+# define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
+ { {  __PTHREAD_MUTEX_INITIALIZER (PTHREAD_MUTEX_RECURSIVE_NP) } }
+# define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \
+ { {  __PTHREAD_MUTEX_INITIALIZER (PTHREAD_MUTEX_ERRORCHECK_NP) } }
+# define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
+ { {  __PTHREAD_MUTEX_INITIALIZER (PTHREAD_MUTEX_ADAPTIVE_NP) } }
+#endif
+
+
+/* Read-write lock types.  */
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K
+enum
+{
+  PTHREAD_RWLOCK_PREFER_READER_NP,
+  PTHREAD_RWLOCK_PREFER_WRITER_NP,
+  PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
+  PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_READER_NP
+};
+
+
+/* Read-write lock initializers.  */
+# define PTHREAD_RWLOCK_INITIALIZER \
+  { { __PTHREAD_RWLOCK_INITIALIZER (PTHREAD_RWLOCK_DEFAULT_NP) } }
+# ifdef __USE_GNU
+#  define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \
+  { { __PTHREAD_RWLOCK_INITIALIZER (PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP) } }
+# endif
+#endif  /* Unix98 or XOpen2K */
+
+
+/* Scheduler inheritance.  */
+enum
+{
+  PTHREAD_INHERIT_SCHED,
+#define PTHREAD_INHERIT_SCHED   PTHREAD_INHERIT_SCHED
+  PTHREAD_EXPLICIT_SCHED
+#define PTHREAD_EXPLICIT_SCHED  PTHREAD_EXPLICIT_SCHED
+};
+
+
+/* Scope handling.  */
+enum
+{
+  PTHREAD_SCOPE_SYSTEM,
+#define PTHREAD_SCOPE_SYSTEM    PTHREAD_SCOPE_SYSTEM
+  PTHREAD_SCOPE_PROCESS
+#define PTHREAD_SCOPE_PROCESS   PTHREAD_SCOPE_PROCESS
+};
+
+
+/* Process shared or private flag.  */
+enum
+{
+  PTHREAD_PROCESS_PRIVATE,
+#define PTHREAD_PROCESS_PRIVATE PTHREAD_PROCESS_PRIVATE
+  PTHREAD_PROCESS_SHARED
+#define PTHREAD_PROCESS_SHARED  PTHREAD_PROCESS_SHARED
+};
+
+
+
+/* Conditional variable handling.  */
+#define PTHREAD_COND_INITIALIZER { { 0, 0, 0, 0, 0, (void *) 0, 0, 0 } }
+
+
+/* Cleanup buffers */
+struct _pthread_cleanup_buffer
+{
+  void (*__routine) (void *);             /* Function to call.  */
+  void *__arg;                            /* Its argument.  */
+  int __canceltype;                       /* Saved cancellation type. */
+  struct _pthread_cleanup_buffer *__prev; /* Chaining of cleanup functions.  */
+};
+
+/* Cancellation */
+enum
+{
+  PTHREAD_CANCEL_ENABLE,
+#define PTHREAD_CANCEL_ENABLE   PTHREAD_CANCEL_ENABLE
+  PTHREAD_CANCEL_DISABLE
+#define PTHREAD_CANCEL_DISABLE  PTHREAD_CANCEL_DISABLE
+};
+enum
+{
+  PTHREAD_CANCEL_DEFERRED,
+#define PTHREAD_CANCEL_DEFERRED	PTHREAD_CANCEL_DEFERRED
+  PTHREAD_CANCEL_ASYNCHRONOUS
+#define PTHREAD_CANCEL_ASYNCHRONOUS	PTHREAD_CANCEL_ASYNCHRONOUS
+};
+#define PTHREAD_CANCELED ((void *) -1)
+
+
+/* Single execution handling.  */
+#define PTHREAD_ONCE_INIT 0
+
+
+#ifdef __USE_XOPEN2K
+/* Value returned by 'pthread_barrier_wait' for one of the threads after
+   the required number of threads have called this function.
+   -1 is distinct from 0 and all errno constants */
+# define PTHREAD_BARRIER_SERIAL_THREAD -1
+#endif
+
+
+__BEGIN_DECLS
+
+/* Create a new thread, starting with execution of START-ROUTINE
+   getting passed ARG.  Creation attributed come from ATTR.  The new
+   handle is stored in *NEWTHREAD.  */
+extern int pthread_create (pthread_t *__restrict __newthread,
+			   const pthread_attr_t *__restrict __attr,
+			   void *(*__start_routine) (void *),
+			   void *__restrict __arg) __THROWNL __nonnull ((1, 3));
+
+/* Terminate calling thread.
+
+   The registered cleanup handlers are called via exception handling
+   so we cannot mark this function with __THROW.*/
+extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__));
+
+/* Make calling thread wait for termination of the thread TH.  The
+   exit status of the thread is stored in *THREAD_RETURN, if THREAD_RETURN
+   is not NULL.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int pthread_join (pthread_t __th, void **__thread_return);
+
+#ifdef __USE_GNU
+/* Check whether thread TH has terminated.  If yes return the status of
+   the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL.  */
+extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW;
+
+/* Make calling thread wait for termination of the thread TH, but only
+   until TIMEOUT.  The exit status of the thread is stored in
+   *THREAD_RETURN, if THREAD_RETURN is not NULL.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return,
+				 const struct timespec *__abstime);
+
+/* Make calling thread wait for termination of the thread TH, but only
+   until TIMEOUT measured against the clock specified by CLOCKID.  The
+   exit status of the thread is stored in *THREAD_RETURN, if
+   THREAD_RETURN is not NULL.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int pthread_clockjoin_np (pthread_t __th, void **__thread_return,
+                                 clockid_t __clockid,
+				 const struct timespec *__abstime);
+#endif
+
+/* Indicate that the thread TH is never to be joined with PTHREAD_JOIN.
+   The resources of TH will therefore be freed immediately when it
+   terminates, instead of waiting for another thread to perform PTHREAD_JOIN
+   on it.  */
+extern int pthread_detach (pthread_t __th) __THROW;
+
+
+/* Obtain the identifier of the current thread.  */
+extern pthread_t pthread_self (void) __THROW __attribute__ ((__const__));
+
+/* Compare two thread identifiers.  */
+extern int pthread_equal (pthread_t __thread1, pthread_t __thread2)
+  __THROW __attribute__ ((__const__));
+
+
+/* Thread attribute handling.  */
+
+/* Initialize thread attribute *ATTR with default attributes
+   (detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER,
+    no user-provided stack).  */
+extern int pthread_attr_init (pthread_attr_t *__attr) __THROW __nonnull ((1));
+
+/* Destroy thread attribute *ATTR.  */
+extern int pthread_attr_destroy (pthread_attr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Get detach state attribute.  */
+extern int pthread_attr_getdetachstate (const pthread_attr_t *__attr,
+					int *__detachstate)
+     __THROW __nonnull ((1, 2));
+
+/* Set detach state attribute.  */
+extern int pthread_attr_setdetachstate (pthread_attr_t *__attr,
+					int __detachstate)
+     __THROW __nonnull ((1));
+
+
+/* Get the size of the guard area created for stack overflow protection.  */
+extern int pthread_attr_getguardsize (const pthread_attr_t *__attr,
+				      size_t *__guardsize)
+     __THROW __nonnull ((1, 2));
+
+/* Set the size of the guard area created for stack overflow protection.  */
+extern int pthread_attr_setguardsize (pthread_attr_t *__attr,
+				      size_t __guardsize)
+     __THROW __nonnull ((1));
+
+
+/* Return in *PARAM the scheduling parameters of *ATTR.  */
+extern int pthread_attr_getschedparam (const pthread_attr_t *__restrict __attr,
+				       struct sched_param *__restrict __param)
+     __THROW __nonnull ((1, 2));
+
+/* Set scheduling parameters (priority, etc) in *ATTR according to PARAM.  */
+extern int pthread_attr_setschedparam (pthread_attr_t *__restrict __attr,
+				       const struct sched_param *__restrict
+				       __param) __THROW __nonnull ((1, 2));
+
+/* Return in *POLICY the scheduling policy of *ATTR.  */
+extern int pthread_attr_getschedpolicy (const pthread_attr_t *__restrict
+					__attr, int *__restrict __policy)
+     __THROW __nonnull ((1, 2));
+
+/* Set scheduling policy in *ATTR according to POLICY.  */
+extern int pthread_attr_setschedpolicy (pthread_attr_t *__attr, int __policy)
+     __THROW __nonnull ((1));
+
+/* Return in *INHERIT the scheduling inheritance mode of *ATTR.  */
+extern int pthread_attr_getinheritsched (const pthread_attr_t *__restrict
+					 __attr, int *__restrict __inherit)
+     __THROW __nonnull ((1, 2));
+
+/* Set scheduling inheritance mode in *ATTR according to INHERIT.  */
+extern int pthread_attr_setinheritsched (pthread_attr_t *__attr,
+					 int __inherit)
+     __THROW __nonnull ((1));
+
+
+/* Return in *SCOPE the scheduling contention scope of *ATTR.  */
+extern int pthread_attr_getscope (const pthread_attr_t *__restrict __attr,
+				  int *__restrict __scope)
+     __THROW __nonnull ((1, 2));
+
+/* Set scheduling contention scope in *ATTR according to SCOPE.  */
+extern int pthread_attr_setscope (pthread_attr_t *__attr, int __scope)
+     __THROW __nonnull ((1));
+
+/* Return the previously set address for the stack.  */
+extern int pthread_attr_getstackaddr (const pthread_attr_t *__restrict
+				      __attr, void **__restrict __stackaddr)
+     __THROW __nonnull ((1, 2)) __attribute_deprecated__;
+
+/* Set the starting address of the stack of the thread to be created.
+   Depending on whether the stack grows up or down the value must either
+   be higher or lower than all the address in the memory block.  The
+   minimal size of the block must be PTHREAD_STACK_MIN.  */
+extern int pthread_attr_setstackaddr (pthread_attr_t *__attr,
+				      void *__stackaddr)
+     __THROW __nonnull ((1)) __attribute_deprecated__;
+
+/* Return the currently used minimal stack size.  */
+extern int pthread_attr_getstacksize (const pthread_attr_t *__restrict
+				      __attr, size_t *__restrict __stacksize)
+     __THROW __nonnull ((1, 2));
+
+/* Add information about the minimum stack size needed for the thread
+   to be started.  This size must never be less than PTHREAD_STACK_MIN
+   and must also not exceed the system limits.  */
+extern int pthread_attr_setstacksize (pthread_attr_t *__attr,
+				      size_t __stacksize)
+     __THROW __nonnull ((1));
+
+#ifdef __USE_XOPEN2K
+/* Return the previously set address for the stack.  */
+extern int pthread_attr_getstack (const pthread_attr_t *__restrict __attr,
+				  void **__restrict __stackaddr,
+				  size_t *__restrict __stacksize)
+     __THROW __nonnull ((1, 2, 3));
+
+/* The following two interfaces are intended to replace the last two.  They
+   require setting the address as well as the size since only setting the
+   address will make the implementation on some architectures impossible.  */
+extern int pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
+				  size_t __stacksize) __THROW __nonnull ((1));
+#endif
+
+#ifdef __USE_GNU
+/* Thread created with attribute ATTR will be limited to run only on
+   the processors represented in CPUSET.  */
+extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr,
+					size_t __cpusetsize,
+					const cpu_set_t *__cpuset)
+     __THROW __nonnull ((1, 3));
+
+/* Get bit set in CPUSET representing the processors threads created with
+   ATTR can run on.  */
+extern int pthread_attr_getaffinity_np (const pthread_attr_t *__attr,
+					size_t __cpusetsize,
+					cpu_set_t *__cpuset)
+     __THROW __nonnull ((1, 3));
+
+/* Get the default attributes used by pthread_create in this process.  */
+extern int pthread_getattr_default_np (pthread_attr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Set the default attributes to be used by pthread_create in this
+   process.  */
+extern int pthread_setattr_default_np (const pthread_attr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Initialize thread attribute *ATTR with attributes corresponding to the
+   already running thread TH.  It shall be called on uninitialized ATTR
+   and destroyed with pthread_attr_destroy when no longer needed.  */
+extern int pthread_getattr_np (pthread_t __th, pthread_attr_t *__attr)
+     __THROW __nonnull ((2));
+#endif
+
+
+/* Functions for scheduling control.  */
+
+/* Set the scheduling parameters for TARGET_THREAD according to POLICY
+   and *PARAM.  */
+extern int pthread_setschedparam (pthread_t __target_thread, int __policy,
+				  const struct sched_param *__param)
+     __THROW __nonnull ((3));
+
+/* Return in *POLICY and *PARAM the scheduling parameters for TARGET_THREAD. */
+extern int pthread_getschedparam (pthread_t __target_thread,
+				  int *__restrict __policy,
+				  struct sched_param *__restrict __param)
+     __THROW __nonnull ((2, 3));
+
+/* Set the scheduling priority for TARGET_THREAD.  */
+extern int pthread_setschedprio (pthread_t __target_thread, int __prio)
+     __THROW;
+
+
+#ifdef __USE_GNU
+/* Get thread name visible in the kernel and its interfaces.  */
+extern int pthread_getname_np (pthread_t __target_thread, char *__buf,
+			       size_t __buflen)
+     __THROW __nonnull ((2));
+
+/* Set thread name visible in the kernel and its interfaces.  */
+extern int pthread_setname_np (pthread_t __target_thread, const char *__name)
+     __THROW __nonnull ((2));
+#endif
+
+
+#ifdef __USE_UNIX98
+/* Determine level of concurrency.  */
+extern int pthread_getconcurrency (void) __THROW;
+
+/* Set new concurrency level to LEVEL.  */
+extern int pthread_setconcurrency (int __level) __THROW;
+#endif
+
+#ifdef __USE_GNU
+/* Yield the processor to another thread or process.
+   This function is similar to the POSIX `sched_yield' function but
+   might be differently implemented in the case of a m-on-n thread
+   implementation.  */
+extern int pthread_yield (void) __THROW;
+
+
+/* Limit specified thread TH to run only on the processors represented
+   in CPUSET.  */
+extern int pthread_setaffinity_np (pthread_t __th, size_t __cpusetsize,
+				   const cpu_set_t *__cpuset)
+     __THROW __nonnull ((3));
+
+/* Get bit set in CPUSET representing the processors TH can run on.  */
+extern int pthread_getaffinity_np (pthread_t __th, size_t __cpusetsize,
+				   cpu_set_t *__cpuset)
+     __THROW __nonnull ((3));
+#endif
+
+
+/* Functions for handling initialization.  */
+
+/* Guarantee that the initialization function INIT_ROUTINE will be called
+   only once, even if pthread_once is executed several times with the
+   same ONCE_CONTROL argument. ONCE_CONTROL must point to a static or
+   extern variable initialized to PTHREAD_ONCE_INIT.
+
+   The initialization functions might throw exception which is why
+   this function is not marked with __THROW.  */
+extern int pthread_once (pthread_once_t *__once_control,
+			 void (*__init_routine) (void)) __nonnull ((1, 2));
+
+
+/* Functions for handling cancellation.
+
+   Note that these functions are explicitly not marked to not throw an
+   exception in C++ code.  If cancellation is implemented by unwinding
+   this is necessary to have the compiler generate the unwind information.  */
+
+/* Set cancelability state of current thread to STATE, returning old
+   state in *OLDSTATE if OLDSTATE is not NULL.  */
+extern int pthread_setcancelstate (int __state, int *__oldstate);
+
+/* Set cancellation state of current thread to TYPE, returning the old
+   type in *OLDTYPE if OLDTYPE is not NULL.  */
+extern int pthread_setcanceltype (int __type, int *__oldtype);
+
+/* Cancel THREAD immediately or at the next possibility.  */
+extern int pthread_cancel (pthread_t __th);
+
+/* Test for pending cancellation for the current thread and terminate
+   the thread as per pthread_exit(PTHREAD_CANCELED) if it has been
+   cancelled.  */
+extern void pthread_testcancel (void);
+
+
+/* Cancellation handling with integration into exception handling.  */
+
+typedef struct
+{
+  struct
+  {
+    __jmp_buf __cancel_jmp_buf;
+    int __mask_was_saved;
+  } __cancel_jmp_buf[1];
+  void *__pad[4];
+} __pthread_unwind_buf_t __attribute__ ((__aligned__));
+
+/* No special attributes by default.  */
+#ifndef __cleanup_fct_attribute
+# define __cleanup_fct_attribute
+#endif
+
+
+/* Structure to hold the cleanup handler information.  */
+struct __pthread_cleanup_frame
+{
+  void (*__cancel_routine) (void *);
+  void *__cancel_arg;
+  int __do_it;
+  int __cancel_type;
+};
+
+#if defined __GNUC__ && defined __EXCEPTIONS
+# ifdef __cplusplus
+/* Class to handle cancellation handler invocation.  */
+class __pthread_cleanup_class
+{
+  void (*__cancel_routine) (void *);
+  void *__cancel_arg;
+  int __do_it;
+  int __cancel_type;
+
+ public:
+  __pthread_cleanup_class (void (*__fct) (void *), void *__arg)
+    : __cancel_routine (__fct), __cancel_arg (__arg), __do_it (1) { }
+  ~__pthread_cleanup_class () { if (__do_it) __cancel_routine (__cancel_arg); }
+  void __setdoit (int __newval) { __do_it = __newval; }
+  void __defer () { pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED,
+					   &__cancel_type); }
+  void __restore () const { pthread_setcanceltype (__cancel_type, 0); }
+};
+
+/* Install a cleanup handler: ROUTINE will be called with arguments ARG
+   when the thread is canceled or calls pthread_exit.  ROUTINE will also
+   be called with arguments ARG when the matching pthread_cleanup_pop
+   is executed with non-zero EXECUTE argument.
+
+   pthread_cleanup_push and pthread_cleanup_pop are macros and must always
+   be used in matching pairs at the same nesting level of braces.  */
+#  define pthread_cleanup_push(routine, arg) \
+  do {									      \
+    __pthread_cleanup_class __clframe (routine, arg)
+
+/* Remove a cleanup handler installed by the matching pthread_cleanup_push.
+   If EXECUTE is non-zero, the handler function is called. */
+#  define pthread_cleanup_pop(execute) \
+    __clframe.__setdoit (execute);					      \
+  } while (0)
+
+#  ifdef __USE_GNU
+/* Install a cleanup handler as pthread_cleanup_push does, but also
+   saves the current cancellation type and sets it to deferred
+   cancellation.  */
+#   define pthread_cleanup_push_defer_np(routine, arg) \
+  do {									      \
+    __pthread_cleanup_class __clframe (routine, arg);			      \
+    __clframe.__defer ()
+
+/* Remove a cleanup handler as pthread_cleanup_pop does, but also
+   restores the cancellation type that was in effect when the matching
+   pthread_cleanup_push_defer was called.  */
+#   define pthread_cleanup_pop_restore_np(execute) \
+    __clframe.__restore ();						      \
+    __clframe.__setdoit (execute);					      \
+  } while (0)
+#  endif
+# else
+/* Function called to call the cleanup handler.  As an extern inline
+   function the compiler is free to decide inlining the change when
+   needed or fall back on the copy which must exist somewhere
+   else.  */
+__extern_inline void
+__pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame)
+{
+  if (__frame->__do_it)
+    __frame->__cancel_routine (__frame->__cancel_arg);
+}
+
+/* Install a cleanup handler: ROUTINE will be called with arguments ARG
+   when the thread is canceled or calls pthread_exit.  ROUTINE will also
+   be called with arguments ARG when the matching pthread_cleanup_pop
+   is executed with non-zero EXECUTE argument.
+
+   pthread_cleanup_push and pthread_cleanup_pop are macros and must always
+   be used in matching pairs at the same nesting level of braces.  */
+#  define pthread_cleanup_push(routine, arg) \
+  do {									      \
+    struct __pthread_cleanup_frame __clframe				      \
+      __attribute__ ((__cleanup__ (__pthread_cleanup_routine)))		      \
+      = { .__cancel_routine = (routine), .__cancel_arg = (arg),	 	      \
+	  .__do_it = 1 };
+
+/* Remove a cleanup handler installed by the matching pthread_cleanup_push.
+   If EXECUTE is non-zero, the handler function is called. */
+#  define pthread_cleanup_pop(execute) \
+    __clframe.__do_it = (execute);					      \
+  } while (0)
+
+#  ifdef __USE_GNU
+/* Install a cleanup handler as pthread_cleanup_push does, but also
+   saves the current cancellation type and sets it to deferred
+   cancellation.  */
+#   define pthread_cleanup_push_defer_np(routine, arg) \
+  do {									      \
+    struct __pthread_cleanup_frame __clframe				      \
+      __attribute__ ((__cleanup__ (__pthread_cleanup_routine)))		      \
+      = { .__cancel_routine = (routine), .__cancel_arg = (arg),		      \
+	  .__do_it = 1 };						      \
+    (void) pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED,		      \
+				  &__clframe.__cancel_type)
+
+/* Remove a cleanup handler as pthread_cleanup_pop does, but also
+   restores the cancellation type that was in effect when the matching
+   pthread_cleanup_push_defer was called.  */
+#   define pthread_cleanup_pop_restore_np(execute) \
+    (void) pthread_setcanceltype (__clframe.__cancel_type, NULL);	      \
+    __clframe.__do_it = (execute);					      \
+  } while (0)
+#  endif
+# endif
+#else
+/* Install a cleanup handler: ROUTINE will be called with arguments ARG
+   when the thread is canceled or calls pthread_exit.  ROUTINE will also
+   be called with arguments ARG when the matching pthread_cleanup_pop
+   is executed with non-zero EXECUTE argument.
+
+   pthread_cleanup_push and pthread_cleanup_pop are macros and must always
+   be used in matching pairs at the same nesting level of braces.  */
+# define pthread_cleanup_push(routine, arg) \
+  do {									      \
+    __pthread_unwind_buf_t __cancel_buf;				      \
+    void (*__cancel_routine) (void *) = (routine);			      \
+    void *__cancel_arg = (arg);						      \
+    int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *)     \
+					__cancel_buf.__cancel_jmp_buf, 0);    \
+    if (__glibc_unlikely (__not_first_call))				      \
+      {									      \
+	__cancel_routine (__cancel_arg);				      \
+	__pthread_unwind_next (&__cancel_buf);				      \
+	/* NOTREACHED */						      \
+      }									      \
+									      \
+    __pthread_register_cancel (&__cancel_buf);				      \
+    do {
+extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
+     __cleanup_fct_attribute;
+
+/* Remove a cleanup handler installed by the matching pthread_cleanup_push.
+   If EXECUTE is non-zero, the handler function is called. */
+# define pthread_cleanup_pop(execute) \
+      do { } while (0);/* Empty to allow label before pthread_cleanup_pop.  */\
+    } while (0);							      \
+    __pthread_unregister_cancel (&__cancel_buf);			      \
+    if (execute)							      \
+      __cancel_routine (__cancel_arg);					      \
+  } while (0)
+extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
+  __cleanup_fct_attribute;
+
+# ifdef __USE_GNU
+/* Install a cleanup handler as pthread_cleanup_push does, but also
+   saves the current cancellation type and sets it to deferred
+   cancellation.  */
+#  define pthread_cleanup_push_defer_np(routine, arg) \
+  do {									      \
+    __pthread_unwind_buf_t __cancel_buf;				      \
+    void (*__cancel_routine) (void *) = (routine);			      \
+    void *__cancel_arg = (arg);						      \
+    int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *)     \
+					__cancel_buf.__cancel_jmp_buf, 0);    \
+    if (__glibc_unlikely (__not_first_call))				      \
+      {									      \
+	__cancel_routine (__cancel_arg);				      \
+	__pthread_unwind_next (&__cancel_buf);				      \
+	/* NOTREACHED */						      \
+      }									      \
+									      \
+    __pthread_register_cancel_defer (&__cancel_buf);			      \
+    do {
+extern void __pthread_register_cancel_defer (__pthread_unwind_buf_t *__buf)
+     __cleanup_fct_attribute;
+
+/* Remove a cleanup handler as pthread_cleanup_pop does, but also
+   restores the cancellation type that was in effect when the matching
+   pthread_cleanup_push_defer was called.  */
+#  define pthread_cleanup_pop_restore_np(execute) \
+      do { } while (0);/* Empty to allow label before pthread_cleanup_pop.  */\
+    } while (0);							      \
+    __pthread_unregister_cancel_restore (&__cancel_buf);		      \
+    if (execute)							      \
+      __cancel_routine (__cancel_arg);					      \
+  } while (0)
+extern void __pthread_unregister_cancel_restore (__pthread_unwind_buf_t *__buf)
+  __cleanup_fct_attribute;
+# endif
+
+/* Internal interface to initiate cleanup.  */
+extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
+     __cleanup_fct_attribute __attribute__ ((__noreturn__))
+# ifndef SHARED
+     __attribute__ ((__weak__))
+# endif
+     ;
+#endif
+
+/* Function used in the macros.  */
+struct __jmp_buf_tag;
+extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROWNL;
+
+
+/* Mutex handling.  */
+
+/* Initialize a mutex.  */
+extern int pthread_mutex_init (pthread_mutex_t *__mutex,
+			       const pthread_mutexattr_t *__mutexattr)
+     __THROW __nonnull ((1));
+
+/* Destroy a mutex.  */
+extern int pthread_mutex_destroy (pthread_mutex_t *__mutex)
+     __THROW __nonnull ((1));
+
+/* Try locking a mutex.  */
+extern int pthread_mutex_trylock (pthread_mutex_t *__mutex)
+     __THROWNL __nonnull ((1));
+
+/* Lock a mutex.  */
+extern int pthread_mutex_lock (pthread_mutex_t *__mutex)
+     __THROWNL __nonnull ((1));
+
+#ifdef __USE_XOPEN2K
+/* Wait until lock becomes available, or specified time passes. */
+extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex,
+				    const struct timespec *__restrict
+				    __abstime) __THROWNL __nonnull ((1, 2));
+#endif
+
+#ifdef __USE_GNU
+extern int pthread_mutex_clocklock (pthread_mutex_t *__restrict __mutex,
+				    clockid_t __clockid,
+				    const struct timespec *__restrict
+				    __abstime) __THROWNL __nonnull ((1, 3));
+#endif
+
+/* Unlock a mutex.  */
+extern int pthread_mutex_unlock (pthread_mutex_t *__mutex)
+     __THROWNL __nonnull ((1));
+
+
+/* Get the priority ceiling of MUTEX.  */
+extern int pthread_mutex_getprioceiling (const pthread_mutex_t *
+					 __restrict __mutex,
+					 int *__restrict __prioceiling)
+     __THROW __nonnull ((1, 2));
+
+/* Set the priority ceiling of MUTEX to PRIOCEILING, return old
+   priority ceiling value in *OLD_CEILING.  */
+extern int pthread_mutex_setprioceiling (pthread_mutex_t *__restrict __mutex,
+					 int __prioceiling,
+					 int *__restrict __old_ceiling)
+     __THROW __nonnull ((1, 3));
+
+
+#ifdef __USE_XOPEN2K8
+/* Declare the state protected by MUTEX as consistent.  */
+extern int pthread_mutex_consistent (pthread_mutex_t *__mutex)
+     __THROW __nonnull ((1));
+# ifdef __USE_GNU
+extern int pthread_mutex_consistent_np (pthread_mutex_t *__mutex)
+     __THROW __nonnull ((1));
+# endif
+#endif
+
+
+/* Functions for handling mutex attributes.  */
+
+/* Initialize mutex attribute object ATTR with default attributes
+   (kind is PTHREAD_MUTEX_TIMED_NP).  */
+extern int pthread_mutexattr_init (pthread_mutexattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Destroy mutex attribute object ATTR.  */
+extern int pthread_mutexattr_destroy (pthread_mutexattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Get the process-shared flag of the mutex attribute ATTR.  */
+extern int pthread_mutexattr_getpshared (const pthread_mutexattr_t *
+					 __restrict __attr,
+					 int *__restrict __pshared)
+     __THROW __nonnull ((1, 2));
+
+/* Set the process-shared flag of the mutex attribute ATTR.  */
+extern int pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr,
+					 int __pshared)
+     __THROW __nonnull ((1));
+
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
+/* Return in *KIND the mutex kind attribute in *ATTR.  */
+extern int pthread_mutexattr_gettype (const pthread_mutexattr_t *__restrict
+				      __attr, int *__restrict __kind)
+     __THROW __nonnull ((1, 2));
+
+/* Set the mutex kind attribute in *ATTR to KIND (either PTHREAD_MUTEX_NORMAL,
+   PTHREAD_MUTEX_RECURSIVE, PTHREAD_MUTEX_ERRORCHECK, or
+   PTHREAD_MUTEX_DEFAULT).  */
+extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind)
+     __THROW __nonnull ((1));
+#endif
+
+/* Return in *PROTOCOL the mutex protocol attribute in *ATTR.  */
+extern int pthread_mutexattr_getprotocol (const pthread_mutexattr_t *
+					  __restrict __attr,
+					  int *__restrict __protocol)
+     __THROW __nonnull ((1, 2));
+
+/* Set the mutex protocol attribute in *ATTR to PROTOCOL (either
+   PTHREAD_PRIO_NONE, PTHREAD_PRIO_INHERIT, or PTHREAD_PRIO_PROTECT).  */
+extern int pthread_mutexattr_setprotocol (pthread_mutexattr_t *__attr,
+					  int __protocol)
+     __THROW __nonnull ((1));
+
+/* Return in *PRIOCEILING the mutex prioceiling attribute in *ATTR.  */
+extern int pthread_mutexattr_getprioceiling (const pthread_mutexattr_t *
+					     __restrict __attr,
+					     int *__restrict __prioceiling)
+     __THROW __nonnull ((1, 2));
+
+/* Set the mutex prioceiling attribute in *ATTR to PRIOCEILING.  */
+extern int pthread_mutexattr_setprioceiling (pthread_mutexattr_t *__attr,
+					     int __prioceiling)
+     __THROW __nonnull ((1));
+
+#ifdef __USE_XOPEN2K
+/* Get the robustness flag of the mutex attribute ATTR.  */
+extern int pthread_mutexattr_getrobust (const pthread_mutexattr_t *__attr,
+					int *__robustness)
+     __THROW __nonnull ((1, 2));
+# ifdef __USE_GNU
+extern int pthread_mutexattr_getrobust_np (const pthread_mutexattr_t *__attr,
+					   int *__robustness)
+     __THROW __nonnull ((1, 2));
+# endif
+
+/* Set the robustness flag of the mutex attribute ATTR.  */
+extern int pthread_mutexattr_setrobust (pthread_mutexattr_t *__attr,
+					int __robustness)
+     __THROW __nonnull ((1));
+# ifdef __USE_GNU
+extern int pthread_mutexattr_setrobust_np (pthread_mutexattr_t *__attr,
+					   int __robustness)
+     __THROW __nonnull ((1));
+# endif
+#endif
+
+
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K
+/* Functions for handling read-write locks.  */
+
+/* Initialize read-write lock RWLOCK using attributes ATTR, or use
+   the default values if later is NULL.  */
+extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
+				const pthread_rwlockattr_t *__restrict
+				__attr) __THROW __nonnull ((1));
+
+/* Destroy read-write lock RWLOCK.  */
+extern int pthread_rwlock_destroy (pthread_rwlock_t *__rwlock)
+     __THROW __nonnull ((1));
+
+/* Acquire read lock for RWLOCK.  */
+extern int pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock)
+     __THROWNL __nonnull ((1));
+
+/* Try to acquire read lock for RWLOCK.  */
+extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock)
+  __THROWNL __nonnull ((1));
+
+# ifdef __USE_XOPEN2K
+/* Try to acquire read lock for RWLOCK or return after specfied time.  */
+extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock,
+				       const struct timespec *__restrict
+				       __abstime) __THROWNL __nonnull ((1, 2));
+# endif
+
+# ifdef __USE_GNU
+extern int pthread_rwlock_clockrdlock (pthread_rwlock_t *__restrict __rwlock,
+				       clockid_t __clockid,
+				       const struct timespec *__restrict
+				       __abstime) __THROWNL __nonnull ((1, 3));
+# endif
+
+/* Acquire write lock for RWLOCK.  */
+extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock)
+     __THROWNL __nonnull ((1));
+
+/* Try to acquire write lock for RWLOCK.  */
+extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock)
+     __THROWNL __nonnull ((1));
+
+# ifdef __USE_XOPEN2K
+/* Try to acquire write lock for RWLOCK or return after specfied time.  */
+extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock,
+				       const struct timespec *__restrict
+				       __abstime) __THROWNL __nonnull ((1, 2));
+# endif
+
+# ifdef __USE_GNU
+extern int pthread_rwlock_clockwrlock (pthread_rwlock_t *__restrict __rwlock,
+				       clockid_t __clockid,
+				       const struct timespec *__restrict
+				       __abstime) __THROWNL __nonnull ((1, 3));
+# endif
+
+/* Unlock RWLOCK.  */
+extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock)
+     __THROWNL __nonnull ((1));
+
+
+/* Functions for handling read-write lock attributes.  */
+
+/* Initialize attribute object ATTR with default values.  */
+extern int pthread_rwlockattr_init (pthread_rwlockattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Destroy attribute object ATTR.  */
+extern int pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Return current setting of process-shared attribute of ATTR in PSHARED.  */
+extern int pthread_rwlockattr_getpshared (const pthread_rwlockattr_t *
+					  __restrict __attr,
+					  int *__restrict __pshared)
+     __THROW __nonnull ((1, 2));
+
+/* Set process-shared attribute of ATTR to PSHARED.  */
+extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t *__attr,
+					  int __pshared)
+     __THROW __nonnull ((1));
+
+/* Return current setting of reader/writer preference.  */
+extern int pthread_rwlockattr_getkind_np (const pthread_rwlockattr_t *
+					  __restrict __attr,
+					  int *__restrict __pref)
+     __THROW __nonnull ((1, 2));
+
+/* Set reader/write preference.  */
+extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr,
+					  int __pref) __THROW __nonnull ((1));
+#endif
+
+
+/* Functions for handling conditional variables.  */
+
+/* Initialize condition variable COND using attributes ATTR, or use
+   the default values if later is NULL.  */
+extern int pthread_cond_init (pthread_cond_t *__restrict __cond,
+			      const pthread_condattr_t *__restrict __cond_attr)
+     __THROW __nonnull ((1));
+
+/* Destroy condition variable COND.  */
+extern int pthread_cond_destroy (pthread_cond_t *__cond)
+     __THROW __nonnull ((1));
+
+/* Wake up one thread waiting for condition variable COND.  */
+extern int pthread_cond_signal (pthread_cond_t *__cond)
+     __THROWNL __nonnull ((1));
+
+/* Wake up all threads waiting for condition variables COND.  */
+extern int pthread_cond_broadcast (pthread_cond_t *__cond)
+     __THROWNL __nonnull ((1));
+
+/* Wait for condition variable COND to be signaled or broadcast.
+   MUTEX is assumed to be locked before.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int pthread_cond_wait (pthread_cond_t *__restrict __cond,
+			      pthread_mutex_t *__restrict __mutex)
+     __nonnull ((1, 2));
+
+/* Wait for condition variable COND to be signaled or broadcast until
+   ABSTIME.  MUTEX is assumed to be locked before.  ABSTIME is an
+   absolute time specification; zero is the beginning of the epoch
+   (00:00:00 GMT, January 1, 1970).
+
+   This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond,
+				   pthread_mutex_t *__restrict __mutex,
+				   const struct timespec *__restrict __abstime)
+     __nonnull ((1, 2, 3));
+
+# ifdef __USE_GNU
+/* Wait for condition variable COND to be signaled or broadcast until
+   ABSTIME measured by the specified clock. MUTEX is assumed to be
+   locked before. CLOCK is the clock to use. ABSTIME is an absolute
+   time specification against CLOCK's epoch.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW. */
+extern int pthread_cond_clockwait (pthread_cond_t *__restrict __cond,
+				   pthread_mutex_t *__restrict __mutex,
+				   __clockid_t __clock_id,
+				   const struct timespec *__restrict __abstime)
+     __nonnull ((1, 2, 4));
+# endif
+
+/* Functions for handling condition variable attributes.  */
+
+/* Initialize condition variable attribute ATTR.  */
+extern int pthread_condattr_init (pthread_condattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Destroy condition variable attribute ATTR.  */
+extern int pthread_condattr_destroy (pthread_condattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Get the process-shared flag of the condition variable attribute ATTR.  */
+extern int pthread_condattr_getpshared (const pthread_condattr_t *
+					__restrict __attr,
+					int *__restrict __pshared)
+     __THROW __nonnull ((1, 2));
+
+/* Set the process-shared flag of the condition variable attribute ATTR.  */
+extern int pthread_condattr_setpshared (pthread_condattr_t *__attr,
+					int __pshared) __THROW __nonnull ((1));
+
+#ifdef __USE_XOPEN2K
+/* Get the clock selected for the condition variable attribute ATTR.  */
+extern int pthread_condattr_getclock (const pthread_condattr_t *
+				      __restrict __attr,
+				      __clockid_t *__restrict __clock_id)
+     __THROW __nonnull ((1, 2));
+
+/* Set the clock selected for the condition variable attribute ATTR.  */
+extern int pthread_condattr_setclock (pthread_condattr_t *__attr,
+				      __clockid_t __clock_id)
+     __THROW __nonnull ((1));
+#endif
+
+
+#ifdef __USE_XOPEN2K
+/* Functions to handle spinlocks.  */
+
+/* Initialize the spinlock LOCK.  If PSHARED is nonzero the spinlock can
+   be shared between different processes.  */
+extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared)
+     __THROW __nonnull ((1));
+
+/* Destroy the spinlock LOCK.  */
+extern int pthread_spin_destroy (pthread_spinlock_t *__lock)
+     __THROW __nonnull ((1));
+
+/* Wait until spinlock LOCK is retrieved.  */
+extern int pthread_spin_lock (pthread_spinlock_t *__lock)
+     __THROWNL __nonnull ((1));
+
+/* Try to lock spinlock LOCK.  */
+extern int pthread_spin_trylock (pthread_spinlock_t *__lock)
+     __THROWNL __nonnull ((1));
+
+/* Release spinlock LOCK.  */
+extern int pthread_spin_unlock (pthread_spinlock_t *__lock)
+     __THROWNL __nonnull ((1));
+
+
+/* Functions to handle barriers.  */
+
+/* Initialize BARRIER with the attributes in ATTR.  The barrier is
+   opened when COUNT waiters arrived.  */
+extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier,
+				 const pthread_barrierattr_t *__restrict
+				 __attr, unsigned int __count)
+     __THROW __nonnull ((1));
+
+/* Destroy a previously dynamically initialized barrier BARRIER.  */
+extern int pthread_barrier_destroy (pthread_barrier_t *__barrier)
+     __THROW __nonnull ((1));
+
+/* Wait on barrier BARRIER.  */
+extern int pthread_barrier_wait (pthread_barrier_t *__barrier)
+     __THROWNL __nonnull ((1));
+
+
+/* Initialize barrier attribute ATTR.  */
+extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Destroy previously dynamically initialized barrier attribute ATTR.  */
+extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Get the process-shared flag of the barrier attribute ATTR.  */
+extern int pthread_barrierattr_getpshared (const pthread_barrierattr_t *
+					   __restrict __attr,
+					   int *__restrict __pshared)
+     __THROW __nonnull ((1, 2));
+
+/* Set the process-shared flag of the barrier attribute ATTR.  */
+extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr,
+					   int __pshared)
+     __THROW __nonnull ((1));
+#endif
+
+
+/* Functions for handling thread-specific data.  */
+
+/* Create a key value identifying a location in the thread-specific
+   data area.  Each thread maintains a distinct thread-specific data
+   area.  DESTR_FUNCTION, if non-NULL, is called with the value
+   associated to that key when the key is destroyed.
+   DESTR_FUNCTION is not called if the value associated is NULL when
+   the key is destroyed.  */
+extern int pthread_key_create (pthread_key_t *__key,
+			       void (*__destr_function) (void *))
+     __THROW __nonnull ((1));
+
+/* Destroy KEY.  */
+extern int pthread_key_delete (pthread_key_t __key) __THROW;
+
+/* Return current value of the thread-specific data slot identified by KEY.  */
+extern void *pthread_getspecific (pthread_key_t __key) __THROW;
+
+/* Store POINTER in the thread-specific data slot identified by KEY. */
+extern int pthread_setspecific (pthread_key_t __key,
+				const void *__pointer) __THROW ;
+
+
+#ifdef __USE_XOPEN2K
+/* Get ID of CPU-time clock for thread THREAD_ID.  */
+extern int pthread_getcpuclockid (pthread_t __thread_id,
+				  __clockid_t *__clock_id)
+     __THROW __nonnull ((2));
+#endif
+
+
+/* Install handlers to be called when a new process is created with FORK.
+   The PREPARE handler is called in the parent process just before performing
+   FORK. The PARENT handler is called in the parent process just after FORK.
+   The CHILD handler is called in the child process.  Each of the three
+   handlers can be NULL, meaning that no handler needs to be called at that
+   point.
+   PTHREAD_ATFORK can be called several times, in which case the PREPARE
+   handlers are called in LIFO order (last added with PTHREAD_ATFORK,
+   first called before FORK), and the PARENT and CHILD handlers are called
+   in FIFO (first added, first called).  */
+
+extern int pthread_atfork (void (*__prepare) (void),
+			   void (*__parent) (void),
+			   void (*__child) (void)) __THROW;
+
+
+#ifdef __USE_EXTERN_INLINES
+/* Optimizations.  */
+__extern_inline int
+__NTH (pthread_equal (pthread_t __thread1, pthread_t __thread2))
+{
+  return __thread1 == __thread2;
+}
+#endif
+
+__END_DECLS
+
+#endif	/* pthread.h */
diff --git a/nptl_2_17/pthread_cond_broadcast_2_17.c b/nptl_2_17/pthread_cond_broadcast_2_17.c
new file mode 100644
index 00000000..e1d5f332
--- /dev/null
+++ b/nptl_2_17/pthread_cond_broadcast_2_17.c
@@ -0,0 +1,94 @@
+/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <pthread_2_17.h>
+#include <pthreadP_2_17.h>
+#include <endian.h>
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <stap-probe.h>
+#include <atomic.h>
+
+#include <shlib-compat.h>
+
+#include <kernel-features.h>
+
+int
+__pthread_cond_broadcast (pthread_cond_t *cond)
+{
+  LIBC_PROBE (cond_broadcast, 1, cond);
+
+  int pshared = (cond->__data.__mutex == (void *) ~0l)
+	                 ? LLL_SHARED : LLL_PRIVATE;
+    /* Make sure we are alone.  */
+    lll_lock (cond->__data.__lock, pshared);
+
+  /* Are there any waiters to be woken?  */
+  if (cond->__data.__total_seq > cond->__data.__wakeup_seq)
+
+    {
+      /* Yes.  Mark them all as woken.  */
+      cond->__data.__wakeup_seq = cond->__data.__total_seq;
+      cond->__data.__woken_seq = cond->__data.__total_seq;
+      cond->__data.__futex = (unsigned int) cond->__data.__total_seq * 2;
+      int futex_val = cond->__data.__futex;
+      /* Signal that a broadcast happened.  */
+      ++cond->__data.__broadcast_seq;
+
+      /* We are done.  */
+      lll_unlock (cond->__data.__lock, pshared);
+
+      /* Wake everybody.  */
+      pthread_mutex_t *mut = (pthread_mutex_t *) cond->__data.__mutex;
+
+      /* Do not use requeue for pshared condvars.  */
+      if (mut == (void *) ~0l
+         || PTHREAD_MUTEX_PSHARED (mut) & PTHREAD_MUTEX_PSHARED_BIT)
+       goto wake_all;
+
+#if (defined lll_futex_cmp_requeue_pi \
+     && defined __ASSUME_REQUEUE_PI)
+      if (USE_REQUEUE_PI (mut))
+       {
+         if (lll_futex_cmp_requeue_pi (&cond->__data.__futex, 1, INT_MAX,
+                                       &mut->__data.__lock, futex_val,
+                                       LLL_PRIVATE) == 0)
+           return 0;
+       }
+      else
+#endif
+       /* lll_futex_requeue returns 0 for success and non-zero
+          for errors.  */
+       if (!__builtin_expect (lll_futex_requeue (&cond->__data.__futex, 1,
+                                                 INT_MAX, &mut->__data.__lock,
+                                                 futex_val, LLL_PRIVATE), 0))
+         return 0;
+
+wake_all:
+      lll_futex_wake (&cond->__data.__futex, INT_MAX, pshared);
+      return 0;    
+    }
+  /* We are done.  */
+  lll_unlock (cond->__data.__lock, pshared);
+
+  return 0;
+}
+
+versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast,
+		  GLIBC_2_3_2);
diff --git a/nptl_2_17/pthread_cond_destroy_2_17.c b/nptl_2_17/pthread_cond_destroy_2_17.c
new file mode 100644
index 00000000..62c8ae72
--- /dev/null
+++ b/nptl_2_17/pthread_cond_destroy_2_17.c
@@ -0,0 +1,85 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+#include <errno.h>
+#include <shlib-compat.h>
+#include <stap-probe.h>
+int
+__pthread_cond_destroy (pthread_cond_t *cond)
+{
+  int pshared = (cond->__data.__mutex == (void *) ~0l)
+	                 ? LLL_SHARED : LLL_PRIVATE;
+
+      	LIBC_PROBE (cond_destroy, 1, cond);
+
+  /* Make sure we are alone.  */
+  lll_lock (cond->__data.__lock, pshared);
+
+  if (cond->__data.__total_seq > cond->__data.__wakeup_seq)
+    {
+      /* If there are still some waiters which have not been
+        woken up, this is an application bug.  */
+      lll_unlock (cond->__data.__lock, pshared);
+      return EBUSY;
+    }
+
+  /* Tell pthread_cond_*wait that this condvar is being destroyed.  */
+  cond->__data.__total_seq = -1ULL;
+
+  /* If there are waiters which have been already signalled or
+     broadcasted, but still are using the pthread_cond_t structure,
+     pthread_cond_destroy needs to wait for them.  */
+  unsigned int nwaiters = cond->__data.__nwaiters;
+
+  if (nwaiters >= (1 << COND_NWAITERS_SHIFT))
+
+    {
+      /* Wake everybody on the associated mutex in case there are
+        threads that have been requeued to it.
+        Without this, pthread_cond_destroy could block potentially
+        for a long time or forever, as it would depend on other
+        thread's using the mutex.
+        When all threads waiting on the mutex are woken up, pthread_cond_wait
+        only waits for threads to acquire and release the internal
+        condvar lock.  */
+      if (cond->__data.__mutex != NULL
+         && cond->__data.__mutex != (void *) ~0l)
+       {
+         pthread_mutex_t *mut = (pthread_mutex_t *) cond->__data.__mutex;
+         lll_futex_wake (&mut->__data.__lock, INT_MAX,
+                         PTHREAD_MUTEX_PSHARED (mut));
+       }
+
+      do
+       {
+         lll_unlock (cond->__data.__lock, pshared);
+
+         lll_futex_wait (&cond->__data.__nwaiters, nwaiters, pshared);
+
+         lll_lock (cond->__data.__lock, pshared);
+
+         nwaiters = cond->__data.__nwaiters;
+       }
+      while (nwaiters >= (1 << COND_NWAITERS_SHIFT));    
+    }
+  
+  return 0;
+}
+versioned_symbol (libpthread, __pthread_cond_destroy,
+		  pthread_cond_destroy, GLIBC_2_3_2);
diff --git a/nptl_2_17/pthread_cond_init_2_17.c b/nptl_2_17/pthread_cond_init_2_17.c
new file mode 100644
index 00000000..7acaa86b
--- /dev/null
+++ b/nptl_2_17/pthread_cond_init_2_17.c
@@ -0,0 +1,50 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+#include <shlib-compat.h>
+#include <stap-probe.h>
+
+
+int
+__pthread_cond_init (pthread_cond_t *cond, const pthread_condattr_t *cond_attr)
+{
+  ASSERT_TYPE_SIZE (pthread_cond_t, __SIZEOF_PTHREAD_COND_T);
+
+  struct pthread_condattr *icond_attr = (struct pthread_condattr *) cond_attr;
+
+  cond->__data.__lock = LLL_LOCK_INITIALIZER;
+    cond->__data.__futex = 0;
+      cond->__data.__nwaiters = (icond_attr != NULL
+		                                  ? ((icond_attr->value >> 1)
+							                                 & ((1 << COND_NWAITERS_SHIFT) - 1))
+						                              : CLOCK_REALTIME);
+        cond->__data.__total_seq = 0;
+	  cond->__data.__wakeup_seq = 0;
+	    cond->__data.__woken_seq = 0;
+	      cond->__data.__mutex = (icond_attr == NULL || (icond_attr->value & 1) == 0
+			                               ? NULL : (void *) ~0l);
+	        cond->__data.__broadcast_seq = 0;
+
+
+  LIBC_PROBE (cond_init, 2, cond, cond_attr);
+
+  return 0;
+}
+versioned_symbol (libpthread, __pthread_cond_init,
+		  pthread_cond_init, GLIBC_2_3_2);
diff --git a/nptl_2_17/pthread_cond_signal_2_17.c b/nptl_2_17/pthread_cond_signal_2_17.c
new file mode 100644
index 00000000..a8053d33
--- /dev/null
+++ b/nptl_2_17/pthread_cond_signal_2_17.c
@@ -0,0 +1,82 @@
+/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <pthread_2_17.h>
+#include <pthreadP_2_17.h>
+#include <endian.h>
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+
+#include <shlib-compat.h>
+#include <kernel-features.h>
+#include <stap-probe.h>
+
+
+int
+__pthread_cond_signal (pthread_cond_t *cond)
+{
+  int pshared = (cond->__data.__mutex == (void *) ~0l)
+               ? LLL_SHARED : LLL_PRIVATE;
+      
+	LIBC_PROBE (cond_signal, 1, cond);
+
+  /* Make sure we are alone.  */
+  lll_lock (cond->__data.__lock, pshared);
+
+  /* Are there any waiters to be woken?  */
+  if (cond->__data.__total_seq > cond->__data.__wakeup_seq)
+    {
+      /* Yes.  Mark one of them as woken.  */
+      ++cond->__data.__wakeup_seq;
+      ++cond->__data.__futex;
+
+#if (defined lll_futex_cmp_requeue_pi \
+     && defined __ASSUME_REQUEUE_PI)
+      pthread_mutex_t *mut = cond->__data.__mutex;
+
+      if (USE_REQUEUE_PI (mut)
+       /* This can only really fail with a ENOSYS, since nobody can modify
+          futex while we have the cond_lock.  */
+         && lll_futex_cmp_requeue_pi (&cond->__data.__futex, 1, 0,
+                                      &mut->__data.__lock,
+                                      cond->__data.__futex, pshared) == 0)
+       {
+         lll_unlock (cond->__data.__lock, pshared);
+         return 0;
+       }
+      else
+#endif
+       /* Wake one.  */
+       if (! __builtin_expect (lll_futex_wake_unlock (&cond->__data.__futex,
+                                                      1, 1,
+                                                      &cond->__data.__lock,
+                                                      pshared), 0))
+         return 0;
+
+      /* Fallback if neither of them work.  */
+      lll_futex_wake (&cond->__data.__futex, 1, pshared);
+    }
+/* We are done.  */
+  lll_unlock (cond->__data.__lock, pshared);
+
+  return 0;
+}
+
+versioned_symbol (libpthread, __pthread_cond_signal, pthread_cond_signal,
+		  GLIBC_2_3_2);
diff --git a/nptl_2_17/pthread_cond_timedwait_2_17.c b/nptl_2_17/pthread_cond_timedwait_2_17.c
new file mode 100644
index 00000000..965d51a1
--- /dev/null
+++ b/nptl_2_17/pthread_cond_timedwait_2_17.c
@@ -0,0 +1,268 @@
+/* Copyright (C) 2003-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
+
+   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 <pthread_2_17.h>
+#include <pthreadP_2_17.h>
+#include <endian.h>
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <sys/time.h>
+#include <kernel-features.h>
+
+#include <shlib-compat.h>
+
+#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
+# undef INTERNAL_VSYSCALL
+# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
+# undef INLINE_VSYSCALL
+# define INLINE_VSYSCALL INLINE_SYSCALL
+#else
+# include <libc-vdso.h>
+#endif
+
+/* Cleanup handler, defined in pthread_cond_wait.c.  */
+extern void __condvar_cleanup (void *arg)
+     __attribute__ ((visibility ("hidden")));
+
+struct _condvar_cleanup_buffer
+{
+  int oldtype;
+  pthread_cond_t *cond;
+  pthread_mutex_t *mutex;
+  unsigned int bc_seq;
+};
+
+int
+__pthread_cond_timedwait (pthread_cond_t *cond, pthread_mutex_t *mutex,
+                          const struct timespec *abstime)
+{
+  struct _pthread_cleanup_buffer buffer;
+  struct _condvar_cleanup_buffer cbuffer;
+  int result = 0;
+
+  /* Catch invalid parameters.  */
+  if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+    return EINVAL;
+
+  int pshared = (cond->__data.__mutex == (void *) ~0l)
+                ? LLL_SHARED : LLL_PRIVATE;
+
+#if (defined lll_futex_timed_wait_requeue_pi \
+     && defined __ASSUME_REQUEUE_PI)
+  int pi_flag = 0;
+#endif
+
+  /* Make sure we are alone.  */
+  lll_lock (cond->__data.__lock, pshared);
+
+  /* Now we can release the mutex.  */
+  int err = __pthread_mutex_unlock_usercnt (mutex, 0);
+  if (err)
+    {
+      lll_unlock (cond->__data.__lock, pshared);
+      return err;
+    }
+
+  /* We have one new user of the condvar.  */
+  ++cond->__data.__total_seq;
+  ++cond->__data.__futex;
+  cond->__data.__nwaiters += 1 << COND_NWAITERS_SHIFT;
+
+  /* Work around the fact that the kernel rejects negative timeout values
+     despite them being valid.  */
+  if (__glibc_unlikely (abstime->tv_sec < 0))
+    goto timeout;
+
+  /* Remember the mutex we are using here.  If there is already a
+     different address store this is a bad user bug.  Do not store
+     anything for pshared condvars.  */
+  if (cond->__data.__mutex != (void *) ~0l)
+    cond->__data.__mutex = mutex;
+
+  /* Prepare structure passed to cancellation handler.  */
+  cbuffer.cond = cond;
+  cbuffer.mutex = mutex;
+
+  /* Before we block we enable cancellation.  Therefore we have to
+     install a cancellation handler.  */
+  __pthread_cleanup_push (&buffer, __condvar_cleanup, &cbuffer);
+
+  /* The current values of the wakeup counter.  The "woken" counter
+     must exceed this value.  */
+  unsigned long long int val;
+  unsigned long long int seq;
+  val = seq = cond->__data.__wakeup_seq;
+  /* Remember the broadcast counter.  */
+  cbuffer.bc_seq = cond->__data.__broadcast_seq;
+
+  while (1)
+    {
+#if (!defined __ASSUME_FUTEX_CLOCK_REALTIME \
+     || !defined lll_futex_timed_wait_bitset)
+      struct timespec rt;
+      {
+# ifdef __NR_clock_gettime
+        INTERNAL_SYSCALL_DECL (err);
+        (void) INTERNAL_VSYSCALL (clock_gettime, err, 2,
+                                  (cond->__data.__nwaiters
+                                   & ((1 << COND_NWAITERS_SHIFT) - 1)),
+                                  &rt);
+        /* Convert the absolute timeout value to a relative timeout.  */
+        rt.tv_sec = abstime->tv_sec - rt.tv_sec;
+        rt.tv_nsec = abstime->tv_nsec - rt.tv_nsec;
+# else
+        /* Get the current time.  So far we support only one clock.  */
+        struct timeval tv;
+        (void) __gettimeofday (&tv, NULL);
+
+        /* Convert the absolute timeout value to a relative timeout.  */
+        rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+        rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+# endif
+      }
+      if (rt.tv_nsec < 0)
+        {
+          rt.tv_nsec += 1000000000;
+          --rt.tv_sec;
+        }
+      /* Did we already time out?  */
+      if (__glibc_unlikely (rt.tv_sec < 0))
+        {
+          if (cbuffer.bc_seq != cond->__data.__broadcast_seq)
+            goto bc_out;
+
+          goto timeout;
+        }
+#endif
+
+      unsigned int futex_val = cond->__data.__futex;
+
+      /* Prepare to wait.  Release the condvar futex.  */
+      lll_unlock (cond->__data.__lock, pshared);
+
+      /* Enable asynchronous cancellation.  Required by the standard.  */
+      cbuffer.oldtype = __pthread_enable_asynccancel ();
+
+/* REQUEUE_PI was implemented after FUTEX_CLOCK_REALTIME, so it is sufficient
+   to check just the former.  */
+#if (defined lll_futex_timed_wait_requeue_pi \
+     && defined __ASSUME_REQUEUE_PI)
+      /* If pi_flag remained 1 then it means that we had the lock and the mutex
+         but a spurious waker raced ahead of us.  Give back the mutex before
+         going into wait again.  */
+      if (pi_flag)
+        {
+          __pthread_mutex_cond_lock_adjust (mutex);
+          __pthread_mutex_unlock_usercnt (mutex, 0);
+        }
+      pi_flag = USE_REQUEUE_PI (mutex);
+
+      if (pi_flag)
+        {
+          unsigned int clockbit = (cond->__data.__nwaiters & 1
+                                   ? 0 : FUTEX_CLOCK_REALTIME);
+          err = lll_futex_timed_wait_requeue_pi (&cond->__data.__futex,
+                                                 futex_val, abstime, clockbit,
+                                                 &mutex->__data.__lock,
+                                                 pshared);
+          pi_flag = (err == 0);
+        }
+      else
+#endif
+
+        {
+#if (!defined __ASSUME_FUTEX_CLOCK_REALTIME \
+     || !defined lll_futex_timed_wait_bitset)
+          /* Wait until woken by signal or broadcast.  */
+          err = lll_futex_timed_wait (&cond->__data.__futex,
+                                      futex_val, &rt, pshared);
+#else
+          unsigned int clockbit = (cond->__data.__nwaiters & 1
+                                   ? 0 : FUTEX_CLOCK_REALTIME);
+          err = lll_futex_timed_wait_bitset (&cond->__data.__futex, futex_val,
+                                             abstime, clockbit, pshared);
+#endif
+        }
+
+      /* Disable asynchronous cancellation.  */
+      __pthread_disable_asynccancel (cbuffer.oldtype);
+
+      /* We are going to look at shared data again, so get the lock.  */
+      lll_lock (cond->__data.__lock, pshared);
+
+      /* If a broadcast happened, we are done.  */
+      if (cbuffer.bc_seq != cond->__data.__broadcast_seq)
+        goto bc_out;
+
+      /* Check whether we are eligible for wakeup.  */
+      val = cond->__data.__wakeup_seq;
+      if (val != seq && cond->__data.__woken_seq != val)
+        break;
+
+      /* Not woken yet.  Maybe the time expired?  */
+      if (__glibc_unlikely (err == -ETIMEDOUT))
+        {
+        timeout:
+          /* Yep.  Adjust the counters.  */
+          ++cond->__data.__wakeup_seq;
+          ++cond->__data.__futex;
+
+          /* The error value.  */
+          result = ETIMEDOUT;
+          break;
+        }
+    }
+
+  /* Another thread woken up.  */
+  ++cond->__data.__woken_seq;
+
+ bc_out:
+
+  cond->__data.__nwaiters -= 1 << COND_NWAITERS_SHIFT;
+
+  /* If pthread_cond_destroy was called on this variable already,
+     notify the pthread_cond_destroy caller all waiters have left
+     and it can be successfully destroyed.  */
+  if (cond->__data.__total_seq == -1ULL
+      && cond->__data.__nwaiters < (1 << COND_NWAITERS_SHIFT))
+    lll_futex_wake (&cond->__data.__nwaiters, 1, pshared);
+
+  /* We are done with the condvar.  */
+  lll_unlock (cond->__data.__lock, pshared);
+
+  /* The cancellation handling is back to normal, remove the handler.  */
+  __pthread_cleanup_pop (&buffer, 0);
+
+  /* Get the mutex before returning.  */
+#if (defined lll_futex_timed_wait_requeue_pi \
+     && defined __ASSUME_REQUEUE_PI)
+  if (pi_flag)
+    {
+      __pthread_mutex_cond_lock_adjust (mutex);
+      err = 0;
+    }
+  else
+#endif
+    err = __pthread_mutex_cond_lock (mutex);
+
+  return err ?: result;
+}
+
+versioned_symbol (libpthread, __pthread_cond_timedwait, pthread_cond_timedwait,
+                  GLIBC_2_3_2);
diff --git a/nptl_2_17/pthread_cond_wait_2_17.c b/nptl_2_17/pthread_cond_wait_2_17.c
new file mode 100644
index 00000000..ecd404ad
--- /dev/null
+++ b/nptl_2_17/pthread_cond_wait_2_17.c
@@ -0,0 +1,231 @@
+/* Copyright (C) 2003-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
+
+   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 <pthread_2_17.h>
+#include <pthreadP_2_17.h>
+#include <endian.h>
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <kernel-features.h>
+#include <shlib-compat.h>
+#include <stap-probe.h>
+
+struct _condvar_cleanup_buffer
+{
+  int oldtype;  
+  pthread_cond_t *cond;
+  pthread_mutex_t *mutex;
+  unsigned int bc_seq;
+};
+
+void
+__attribute__ ((visibility ("hidden")))
+__condvar_cleanup (void *arg)
+{
+  struct _condvar_cleanup_buffer *cbuffer =
+	      (struct _condvar_cleanup_buffer *) arg;
+    unsigned int destroying;
+      int pshared = (cbuffer->cond->__data.__mutex == (void *) ~0l)
+	                     ? LLL_SHARED : LLL_PRIVATE;
+
+      /* We are going to modify shared data.  */
+      lll_lock (cbuffer->cond->__data.__lock, pshared);
+
+  if (cbuffer->bc_seq == cbuffer->cond->__data.__broadcast_seq)    
+    {
+          /* This thread is not waiting anymore.  Adjust the sequence counters
+	   *         appropriately.  We do not increment WAKEUP_SEQ if this would
+	   *                 bump it over the value of TOTAL_SEQ.  This can happen if a thread
+	   *                         was woken and then canceled.  */
+	          if (cbuffer->cond->__data.__wakeup_seq
+				           < cbuffer->cond->__data.__total_seq)
+	{
+	  ++cbuffer->cond->__data.__wakeup_seq;
+          ++cbuffer->cond->__data.__futex;
+	}
+	++cbuffer->cond->__data.__woken_seq;    
+     }
+
+  cbuffer->cond->__data.__nwaiters -= 1 << COND_NWAITERS_SHIFT;
+
+  /* If pthread_cond_destroy was called on this variable already,
+   *      notify the pthread_cond_destroy caller all waiters have left
+   *           and it can be successfully destroyed.  */
+  destroying = 0;
+  if (cbuffer->cond->__data.__total_seq == -1ULL
+		      && cbuffer->cond->__data.__nwaiters < (1 << COND_NWAITERS_SHIFT))  
+    {
+    lll_futex_wake (&cbuffer->cond->__data.__nwaiters, 1, pshared);
+      destroying = 1;
+    }
+
+  /* We are done.  */
+  lll_unlock (cbuffer->cond->__data.__lock, pshared);
+
+    /* Wake everybody to make sure no condvar signal gets lost.  */
+    if (! destroying)
+	    lll_futex_wake (&cbuffer->cond->__data.__futex, INT_MAX, pshared);
+
+	      /* Get the mutex before returning unless asynchronous cancellation
+	       *      is in effect.  We don't try to get the mutex if we already own it.  */
+	      if (!(USE_REQUEUE_PI (cbuffer->mutex))
+			            || ((cbuffer->mutex->__data.__lock & FUTEX_TID_MASK)
+					             != THREAD_GETMEM (THREAD_SELF, tid)))
+	  {
+		      __pthread_mutex_cond_lock (cbuffer->mutex);
+		        }
+  else
+      __pthread_mutex_cond_lock_adjust (cbuffer->mutex);
+}
+
+int
+__pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex)
+{
+struct _pthread_cleanup_buffer buffer;
+  struct _condvar_cleanup_buffer cbuffer;
+  int err;
+  int pshared = (cond->__data.__mutex == (void *) ~0l)
+	                 ? LLL_SHARED : LLL_PRIVATE;
+
+#if (defined lll_futex_wait_requeue_pi \
+		     && defined __ASSUME_REQUEUE_PI)
+    int pi_flag = 0;
+#endif
+
+  LIBC_PROBE (cond_wait, 2, cond, mutex);
+  /* Make sure we are alone.  */
+    lll_lock (cond->__data.__lock, pshared);
+
+      /* Now we can release the mutex.  */
+  err = __pthread_mutex_unlock_usercnt (mutex, 0);
+  if (__glibc_unlikely (err))
+    {
+      lll_unlock (cond->__data.__lock, pshared);
+      return err;
+    }
+  /* We have one new user of the condvar.  */
+    ++cond->__data.__total_seq;
+      ++cond->__data.__futex;
+        cond->__data.__nwaiters += 1 << COND_NWAITERS_SHIFT;
+
+	  /* Remember the mutex we are using here.  If there is already a
+	   *      different address store this is a bad user bug.  Do not store
+	   *           anything for pshared condvars.  */
+	  if (cond->__data.__mutex != (void *) ~0l)
+		      cond->__data.__mutex = mutex;
+
+	    /* Prepare structure passed to cancellation handler.  */
+	    cbuffer.cond = cond;
+	      cbuffer.mutex = mutex;
+
+	        /* Before we block we enable cancellation.  Therefore we have to
+		 *      install a cancellation handler.  */
+	        __pthread_cleanup_push (&buffer, __condvar_cleanup, &cbuffer);
+
+		  /* The current values of the wakeup counter.  The "woken" counter
+		   *      must exceed this value.  */
+		  unsigned long long int val;
+		    unsigned long long int seq;
+		      val = seq = cond->__data.__wakeup_seq;
+		        /* Remember the broadcast counter.  */
+		        cbuffer.bc_seq = cond->__data.__broadcast_seq;
+
+  do
+    {
+      unsigned int futex_val = cond->__data.__futex;
+      /* Prepare to wait.  Release the condvar futex.  */
+      lll_unlock (cond->__data.__lock, pshared);
+
+      /* Enable asynchronous cancellation.  Required by the standard.  */
+      cbuffer.oldtype = __pthread_enable_asynccancel ();
+
+#if (defined lll_futex_wait_requeue_pi \
+     && defined __ASSUME_REQUEUE_PI)
+      /* If pi_flag remained 1 then it means that we had the lock and the mutex
+        but a spurious waker raced ahead of us.  Give back the mutex before
+        going into wait again.  */
+      if (pi_flag) 
+	{
+         __pthread_mutex_cond_lock_adjust (mutex);
+         __pthread_mutex_unlock_usercnt (mutex, 0);	
+	}
+      pi_flag = USE_REQUEUE_PI (mutex);
+ 
+      if (pi_flag)
+	{
+         err = lll_futex_wait_requeue_pi (&cond->__data.__futex,
+                                          futex_val, &mutex->__data.__lock,
+                                          pshared);
+
+         pi_flag = (err == 0);
+    }
+      else
+#endif
+         /* Wait until woken by signal or broadcast.  */
+       lll_futex_wait (&cond->__data.__futex, futex_val, pshared);
+
+      /* Disable asynchronous cancellation.  */
+      __pthread_disable_asynccancel (cbuffer.oldtype);
+
+      /* We are going to look at shared data again, so get the lock.  */
+      lll_lock (cond->__data.__lock, pshared);
+
+      /* If a broadcast happened, we are done.  */
+      if (cbuffer.bc_seq != cond->__data.__broadcast_seq)
+       goto bc_out;
+
+      /* Check whether we are eligible for wakeup.  */
+      val = cond->__data.__wakeup_seq;
+    }
+  while (val == seq || cond->__data.__woken_seq == val);
+
+  /* Another thread woken up.  */
+  ++cond->__data.__woken_seq;
+
+bc_out:
+  cond->__data.__nwaiters -= 1 << COND_NWAITERS_SHIFT;
+
+  /* If pthread_cond_destroy was called on this varaible already,
+     notify the pthread_cond_destroy caller all waiters have left
+     and it can be successfully destroyed.  */
+  if (cond->__data.__total_seq == -1ULL
+      && cond->__data.__nwaiters < (1 << COND_NWAITERS_SHIFT))
+    lll_futex_wake (&cond->__data.__nwaiters, 1, pshared);
+
+  /* We are done with the condvar.  */
+  lll_unlock (cond->__data.__lock, pshared);
+
+  /* The cancellation handling is back to normal, remove the handler.  */
+  __pthread_cleanup_pop (&buffer, 0);
+
+  /* Get the mutex before returning.  Not needed for PI.  */
+#if (defined lll_futex_wait_requeue_pi \
+     && defined __ASSUME_REQUEUE_PI)
+  if (pi_flag)
+    {
+      __pthread_mutex_cond_lock_adjust (mutex);
+      return 0;
+    }
+  else
+#endif
+    return __pthread_mutex_cond_lock (mutex);
+}
+
+versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait,
+		  GLIBC_2_3_2);
diff --git a/nptl_2_17/pthread_condattr_getclock_2_17.c b/nptl_2_17/pthread_condattr_getclock_2_17.c
new file mode 100644
index 00000000..e07b349e
--- /dev/null
+++ b/nptl_2_17/pthread_condattr_getclock_2_17.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+
+
+int
+pthread_condattr_getclock (const pthread_condattr_t *attr, clockid_t *clock_id)
+{
+  *clock_id = (((((const struct pthread_condattr *) attr)->value) >> 1)
+	       & ((1 << COND_NWAITERS_SHIFT) - 1));
+  return 0;
+}
diff --git a/nptl_2_17/pthread_condattr_getpshared_2_17.c b/nptl_2_17/pthread_condattr_getpshared_2_17.c
new file mode 100644
index 00000000..8f4fe2bf
--- /dev/null
+++ b/nptl_2_17/pthread_condattr_getpshared_2_17.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+
+
+int
+pthread_condattr_getpshared (const pthread_condattr_t *attr, int *pshared)
+{
+  *pshared = ((const struct pthread_condattr *) attr)->value & 1;
+
+  return 0;
+}
diff --git a/nptl_2_17/pthread_condattr_init_2_17.c b/nptl_2_17/pthread_condattr_init_2_17.c
new file mode 100644
index 00000000..d90ba1e8
--- /dev/null
+++ b/nptl_2_17/pthread_condattr_init_2_17.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+#include "pthreadP_2_17.h"
+
+
+int
+__pthread_condattr_init (pthread_condattr_t *attr)
+{
+  ASSERT_TYPE_SIZE (pthread_condattr_t, __SIZEOF_PTHREAD_CONDATTR_T);
+  ASSERT_PTHREAD_INTERNAL_SIZE (pthread_condattr_t,
+				struct pthread_condattr);
+
+  memset (attr, '\0', sizeof (*attr));
+
+  return 0;
+}
+strong_alias (__pthread_condattr_init, pthread_condattr_init)
diff --git a/nptl_2_17/pthread_condattr_setclock_2_17.c b/nptl_2_17/pthread_condattr_setclock_2_17.c
new file mode 100644
index 00000000..5d91f17b
--- /dev/null
+++ b/nptl_2_17/pthread_condattr_setclock_2_17.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <time.h>
+#include <sysdep.h>
+#include "pthreadP_2_17.h"
+
+
+int
+pthread_condattr_setclock (pthread_condattr_t *attr, clockid_t clock_id)
+{
+  /* Only a few clocks are allowed.  */
+  if (clock_id != CLOCK_MONOTONIC && clock_id != CLOCK_REALTIME)
+    /* If more clocks are allowed some day the storing of the clock ID
+       in the pthread_cond_t structure needs to be adjusted.  */
+    return EINVAL;
+
+  /* Make sure the value fits in the bits we reserved.  */
+  assert (clock_id < (1 << COND_NWAITERS_SHIFT));
+
+  int *valuep = &((struct pthread_condattr *) attr)->value;
+
+  *valuep = ((*valuep & ~(((1 << COND_NWAITERS_SHIFT) - 1) << 1))
+	     | (clock_id << 1));
+
+  return 0;
+}
diff --git a/nptl_2_17/pthread_mutex_cond_lock_2_17.c b/nptl_2_17/pthread_mutex_cond_lock_2_17.c
new file mode 100644
index 00000000..2f077130
--- /dev/null
+++ b/nptl_2_17/pthread_mutex_cond_lock_2_17.c
@@ -0,0 +1,21 @@
+#include <pthreadP.h>
+
+#define LLL_MUTEX_LOCK(mutex) \
+  lll_cond_lock ((mutex)->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex))
+
+/* Not actually elided so far. Needed? */
+#define LLL_MUTEX_LOCK_ELISION(mutex)  \
+  ({ lll_cond_lock ((mutex)->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex)); 0; })
+
+#define LLL_MUTEX_TRYLOCK(mutex) \
+  lll_cond_trylock ((mutex)->__data.__lock)
+#define LLL_MUTEX_TRYLOCK_ELISION(mutex) LLL_MUTEX_TRYLOCK(mutex)
+
+/* We need to assume that there are other threads blocked on the futex.
+   See __pthread_mutex_lock_full for further details.  */
+#define LLL_ROBUST_MUTEX_LOCK_MODIFIER FUTEX_WAITERS
+#define __pthread_mutex_lock  __pthread_mutex_cond_lock
+#define __pthread_mutex_lock_full __pthread_mutex_cond_lock_full
+#define NO_INCR
+
+#include <nptl/pthread_mutex_lock.c>
diff --git a/nptl_2_17/pthread_mutex_lock_2_17.c b/nptl_2_17/pthread_mutex_lock_2_17.c
new file mode 100644
index 00000000..73ee0842
--- /dev/null
+++ b/nptl_2_17/pthread_mutex_lock_2_17.c
@@ -0,0 +1,628 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <not-cancel.h>
+#include <atomic.h>
+#include <futex-internal.h>
+#include <stap-probe.h>
+
+#ifndef lll_lock_elision
+#define lll_lock_elision(lock, try_lock, private)	({ \
+      lll_lock (lock, private); 0; })
+#endif
+
+#ifndef lll_trylock_elision
+#define lll_trylock_elision(a,t) lll_trylock(a)
+#endif
+
+/* Some of the following definitions differ when pthread_mutex_cond_lock.c
+   includes this file.  */
+#ifndef LLL_MUTEX_LOCK
+# define LLL_MUTEX_LOCK(mutex) \
+  lll_lock ((mutex)->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex))
+# define LLL_MUTEX_TRYLOCK(mutex) \
+  lll_trylock ((mutex)->__data.__lock)
+# define LLL_ROBUST_MUTEX_LOCK_MODIFIER 0
+# define LLL_MUTEX_LOCK_ELISION(mutex) \
+  lll_lock_elision ((mutex)->__data.__lock, (mutex)->__data.__elision, \
+		   PTHREAD_MUTEX_PSHARED (mutex))
+# define LLL_MUTEX_TRYLOCK_ELISION(mutex) \
+  lll_trylock_elision((mutex)->__data.__lock, (mutex)->__data.__elision, \
+		   PTHREAD_MUTEX_PSHARED (mutex))
+#endif
+
+#ifndef FORCE_ELISION
+#define FORCE_ELISION(m, s)
+#endif
+
+static int __pthread_mutex_lock_full (pthread_mutex_t *mutex)
+     __attribute_noinline__;
+
+int
+__pthread_mutex_lock (pthread_mutex_t *mutex)
+{
+  /* See concurrency notes regarding mutex type which is loaded from __kind
+     in struct __pthread_mutex_s in sysdeps/nptl/bits/thread-shared-types.h.  */
+  unsigned int type = PTHREAD_MUTEX_TYPE_ELISION (mutex);
+
+  LIBC_PROBE (mutex_entry, 1, mutex);
+
+  if (__builtin_expect (type & ~(PTHREAD_MUTEX_KIND_MASK_NP
+				 | PTHREAD_MUTEX_ELISION_FLAGS_NP), 0))
+    return __pthread_mutex_lock_full (mutex);
+
+  if (__glibc_likely (type == PTHREAD_MUTEX_TIMED_NP))
+    {
+      FORCE_ELISION (mutex, goto elision);
+    simple:
+      /* Normal mutex.  */
+      LLL_MUTEX_LOCK (mutex);
+      assert (mutex->__data.__owner == 0);
+    }
+#ifdef HAVE_ELISION
+  else if (__glibc_likely (type == PTHREAD_MUTEX_TIMED_ELISION_NP))
+    {
+  elision: __attribute__((unused))
+      /* This case can never happen on a system without elision,
+         as the mutex type initialization functions will not
+	 allow to set the elision flags.  */
+      /* Don't record owner or users for elision case.  This is a
+         tail call.  */
+      return LLL_MUTEX_LOCK_ELISION (mutex);
+    }
+#endif
+  else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex)
+			     == PTHREAD_MUTEX_RECURSIVE_NP, 1))
+    {
+      /* Recursive mutex.  */
+      pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
+
+      /* Check whether we already hold the mutex.  */
+      if (mutex->__data.__owner == id)
+	{
+	  /* Just bump the counter.  */
+	  if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+	    /* Overflow of the counter.  */
+	    return EAGAIN;
+
+	  ++mutex->__data.__count;
+
+	  return 0;
+	}
+
+      /* We have to get the mutex.  */
+      LLL_MUTEX_LOCK (mutex);
+
+      assert (mutex->__data.__owner == 0);
+      mutex->__data.__count = 1;
+    }
+  else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex)
+			  == PTHREAD_MUTEX_ADAPTIVE_NP, 1))
+    {
+      if (! __is_smp)
+	goto simple;
+
+      if (LLL_MUTEX_TRYLOCK (mutex) != 0)
+	{
+	  int cnt = 0;
+	  int max_cnt = MIN (DEFAULT_ADAPTIVE_COUNT,
+			     mutex->__data.__spins * 2 + 10);
+	  do
+	    {
+	      if (cnt++ >= max_cnt)
+		{
+		  LLL_MUTEX_LOCK (mutex);
+		  break;
+		}
+	      atomic_spin_nop ();
+	    }
+	  while (LLL_MUTEX_TRYLOCK (mutex) != 0);
+
+	  mutex->__data.__spins += (cnt - mutex->__data.__spins) / 8;
+	}
+      assert (mutex->__data.__owner == 0);
+    }
+  else
+    {
+      pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
+      assert (PTHREAD_MUTEX_TYPE (mutex) == PTHREAD_MUTEX_ERRORCHECK_NP);
+      /* Check whether we already hold the mutex.  */
+      if (__glibc_unlikely (mutex->__data.__owner == id))
+	return EDEADLK;
+      goto simple;
+    }
+
+  pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
+
+  /* Record the ownership.  */
+  mutex->__data.__owner = id;
+#ifndef NO_INCR
+  ++mutex->__data.__nusers;
+#endif
+
+  LIBC_PROBE (mutex_acquired, 1, mutex);
+
+  return 0;
+}
+
+static int
+__pthread_mutex_lock_full (pthread_mutex_t *mutex)
+{
+  int oldval;
+  pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
+
+  switch (PTHREAD_MUTEX_TYPE (mutex))
+    {
+    case PTHREAD_MUTEX_ROBUST_RECURSIVE_NP:
+    case PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_ROBUST_NORMAL_NP:
+    case PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP:
+      THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+		     &mutex->__data.__list.__next);
+      /* We need to set op_pending before starting the operation.  Also
+	 see comments at ENQUEUE_MUTEX.  */
+      __asm ("" ::: "memory");
+
+      oldval = mutex->__data.__lock;
+      /* This is set to FUTEX_WAITERS iff we might have shared the
+	 FUTEX_WAITERS flag with other threads, and therefore need to keep it
+	 set to avoid lost wake-ups.  We have the same requirement in the
+	 simple mutex algorithm.
+	 We start with value zero for a normal mutex, and FUTEX_WAITERS if we
+	 are building the special case mutexes for use from within condition
+	 variables.  */
+      unsigned int assume_other_futex_waiters = LLL_ROBUST_MUTEX_LOCK_MODIFIER;
+      while (1)
+	{
+	  /* Try to acquire the lock through a CAS from 0 (not acquired) to
+	     our TID | assume_other_futex_waiters.  */
+	  if (__glibc_likely (oldval == 0))
+	    {
+	      oldval
+	        = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+	            id | assume_other_futex_waiters, 0);
+	      if (__glibc_likely (oldval == 0))
+		break;
+	    }
+
+	  if ((oldval & FUTEX_OWNER_DIED) != 0)
+	    {
+	      /* The previous owner died.  Try locking the mutex.  */
+	      int newval = id;
+#ifdef NO_INCR
+	      /* We are not taking assume_other_futex_waiters into accoount
+		 here simply because we'll set FUTEX_WAITERS anyway.  */
+	      newval |= FUTEX_WAITERS;
+#else
+	      newval |= (oldval & FUTEX_WAITERS) | assume_other_futex_waiters;
+#endif
+
+	      newval
+		= atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+						       newval, oldval);
+
+	      if (newval != oldval)
+		{
+		  oldval = newval;
+		  continue;
+		}
+
+	      /* We got the mutex.  */
+	      mutex->__data.__count = 1;
+	      /* But it is inconsistent unless marked otherwise.  */
+	      mutex->__data.__owner = PTHREAD_MUTEX_INCONSISTENT;
+
+	      /* We must not enqueue the mutex before we have acquired it.
+		 Also see comments at ENQUEUE_MUTEX.  */
+	      __asm ("" ::: "memory");
+	      ENQUEUE_MUTEX (mutex);
+	      /* We need to clear op_pending after we enqueue the mutex.  */
+	      __asm ("" ::: "memory");
+	      THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+	      /* Note that we deliberately exit here.  If we fall
+		 through to the end of the function __nusers would be
+		 incremented which is not correct because the old
+		 owner has to be discounted.  If we are not supposed
+		 to increment __nusers we actually have to decrement
+		 it here.  */
+#ifdef NO_INCR
+	      --mutex->__data.__nusers;
+#endif
+
+	      return EOWNERDEAD;
+	    }
+
+	  /* Check whether we already hold the mutex.  */
+	  if (__glibc_unlikely ((oldval & FUTEX_TID_MASK) == id))
+	    {
+	      int kind = PTHREAD_MUTEX_TYPE (mutex);
+	      if (kind == PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP)
+		{
+		  /* We do not need to ensure ordering wrt another memory
+		     access.  Also see comments at ENQUEUE_MUTEX. */
+		  THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+				 NULL);
+		  return EDEADLK;
+		}
+
+	      if (kind == PTHREAD_MUTEX_ROBUST_RECURSIVE_NP)
+		{
+		  /* We do not need to ensure ordering wrt another memory
+		     access.  */
+		  THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+				 NULL);
+
+		  /* Just bump the counter.  */
+		  if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+		    /* Overflow of the counter.  */
+		    return EAGAIN;
+
+		  ++mutex->__data.__count;
+
+		  return 0;
+		}
+	    }
+
+	  /* We cannot acquire the mutex nor has its owner died.  Thus, try
+	     to block using futexes.  Set FUTEX_WAITERS if necessary so that
+	     other threads are aware that there are potentially threads
+	     blocked on the futex.  Restart if oldval changed in the
+	     meantime.  */
+	  if ((oldval & FUTEX_WAITERS) == 0)
+	    {
+	      if (atomic_compare_and_exchange_bool_acq (&mutex->__data.__lock,
+							oldval | FUTEX_WAITERS,
+							oldval)
+		  != 0)
+		{
+		  oldval = mutex->__data.__lock;
+		  continue;
+		}
+	      oldval |= FUTEX_WAITERS;
+	    }
+
+	  /* It is now possible that we share the FUTEX_WAITERS flag with
+	     another thread; therefore, update assume_other_futex_waiters so
+	     that we do not forget about this when handling other cases
+	     above and thus do not cause lost wake-ups.  */
+	  assume_other_futex_waiters |= FUTEX_WAITERS;
+
+	  /* Block using the futex and reload current lock value.  */
+	  lll_futex_wait (&mutex->__data.__lock, oldval,
+			  PTHREAD_ROBUST_MUTEX_PSHARED (mutex));
+	  oldval = mutex->__data.__lock;
+	}
+
+      /* We have acquired the mutex; check if it is still consistent.  */
+      if (__builtin_expect (mutex->__data.__owner
+			    == PTHREAD_MUTEX_NOTRECOVERABLE, 0))
+	{
+	  /* This mutex is now not recoverable.  */
+	  mutex->__data.__count = 0;
+	  int private = PTHREAD_ROBUST_MUTEX_PSHARED (mutex);
+	  lll_unlock (mutex->__data.__lock, private);
+	  /* FIXME This violates the mutex destruction requirements.  See
+	     __pthread_mutex_unlock_full.  */
+	  THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+	  return ENOTRECOVERABLE;
+	}
+
+      mutex->__data.__count = 1;
+      /* We must not enqueue the mutex before we have acquired it.
+	 Also see comments at ENQUEUE_MUTEX.  */
+      __asm ("" ::: "memory");
+      ENQUEUE_MUTEX (mutex);
+      /* We need to clear op_pending after we enqueue the mutex.  */
+      __asm ("" ::: "memory");
+      THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+      break;
+
+    /* The PI support requires the Linux futex system call.  If that's not
+       available, pthread_mutex_init should never have allowed the type to
+       be set.  So it will get the default case for an invalid type.  */
+#ifdef __NR_futex
+    case PTHREAD_MUTEX_PI_RECURSIVE_NP:
+    case PTHREAD_MUTEX_PI_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PI_NORMAL_NP:
+    case PTHREAD_MUTEX_PI_ADAPTIVE_NP:
+    case PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP:
+    case PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP:
+    case PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP:
+      {
+	int kind, robust;
+	{
+	  /* See concurrency notes regarding __kind in struct __pthread_mutex_s
+	     in sysdeps/nptl/bits/thread-shared-types.h.  */
+	  int mutex_kind = atomic_load_relaxed (&(mutex->__data.__kind));
+	  kind = mutex_kind & PTHREAD_MUTEX_KIND_MASK_NP;
+	  robust = mutex_kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP;
+	}
+
+	if (robust)
+	  {
+	    /* Note: robust PI futexes are signaled by setting bit 0.  */
+	    THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+			   (void *) (((uintptr_t) &mutex->__data.__list.__next)
+				     | 1));
+	    /* We need to set op_pending before starting the operation.  Also
+	       see comments at ENQUEUE_MUTEX.  */
+	    __asm ("" ::: "memory");
+	  }
+
+	oldval = mutex->__data.__lock;
+
+	/* Check whether we already hold the mutex.  */
+	if (__glibc_unlikely ((oldval & FUTEX_TID_MASK) == id))
+	  {
+	    if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+	      {
+		/* We do not need to ensure ordering wrt another memory
+		   access.  */
+		THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+		return EDEADLK;
+	      }
+
+	    if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+	      {
+		/* We do not need to ensure ordering wrt another memory
+		   access.  */
+		THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+		/* Just bump the counter.  */
+		if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+		  /* Overflow of the counter.  */
+		  return EAGAIN;
+
+		++mutex->__data.__count;
+
+		return 0;
+	      }
+	  }
+
+	int newval = id;
+# ifdef NO_INCR
+	newval |= FUTEX_WAITERS;
+# endif
+	oldval = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+						      newval, 0);
+
+	if (oldval != 0)
+	  {
+	    /* The mutex is locked.  The kernel will now take care of
+	       everything.  */
+	    int private = (robust
+			   ? PTHREAD_ROBUST_MUTEX_PSHARED (mutex)
+			   : PTHREAD_MUTEX_PSHARED (mutex));
+	    int e = futex_lock_pi ((unsigned int *) &mutex->__data.__lock,
+				   NULL, private);
+	    if (e == ESRCH || e == EDEADLK)
+	      {
+		assert (e != EDEADLK
+			|| (kind != PTHREAD_MUTEX_ERRORCHECK_NP
+			    && kind != PTHREAD_MUTEX_RECURSIVE_NP));
+		/* ESRCH can happen only for non-robust PI mutexes where
+		   the owner of the lock died.  */
+		assert (e != ESRCH || !robust);
+
+		/* Delay the thread indefinitely.  */
+		while (1)
+		  lll_timedwait (&(int){0}, 0, 0 /* ignored */, NULL,
+				 private);
+	      }
+
+	    oldval = mutex->__data.__lock;
+
+	    assert (robust || (oldval & FUTEX_OWNER_DIED) == 0);
+	  }
+
+	if (__glibc_unlikely (oldval & FUTEX_OWNER_DIED))
+	  {
+	    atomic_and (&mutex->__data.__lock, ~FUTEX_OWNER_DIED);
+
+	    /* We got the mutex.  */
+	    mutex->__data.__count = 1;
+	    /* But it is inconsistent unless marked otherwise.  */
+	    mutex->__data.__owner = PTHREAD_MUTEX_INCONSISTENT;
+
+	    /* We must not enqueue the mutex before we have acquired it.
+	       Also see comments at ENQUEUE_MUTEX.  */
+	    __asm ("" ::: "memory");
+	    ENQUEUE_MUTEX_PI (mutex);
+	    /* We need to clear op_pending after we enqueue the mutex.  */
+	    __asm ("" ::: "memory");
+	    THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+	    /* Note that we deliberately exit here.  If we fall
+	       through to the end of the function __nusers would be
+	       incremented which is not correct because the old owner
+	       has to be discounted.  If we are not supposed to
+	       increment __nusers we actually have to decrement it here.  */
+# ifdef NO_INCR
+	    --mutex->__data.__nusers;
+# endif
+
+	    return EOWNERDEAD;
+	  }
+
+	if (robust
+	    && __builtin_expect (mutex->__data.__owner
+				 == PTHREAD_MUTEX_NOTRECOVERABLE, 0))
+	  {
+	    /* This mutex is now not recoverable.  */
+	    mutex->__data.__count = 0;
+
+	    futex_unlock_pi ((unsigned int *) &mutex->__data.__lock,
+			     PTHREAD_ROBUST_MUTEX_PSHARED (mutex));
+
+	    /* To the kernel, this will be visible after the kernel has
+	       acquired the mutex in the syscall.  */
+	    THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+	    return ENOTRECOVERABLE;
+	  }
+
+	mutex->__data.__count = 1;
+	if (robust)
+	  {
+	    /* We must not enqueue the mutex before we have acquired it.
+	       Also see comments at ENQUEUE_MUTEX.  */
+	    __asm ("" ::: "memory");
+	    ENQUEUE_MUTEX_PI (mutex);
+	    /* We need to clear op_pending after we enqueue the mutex.  */
+	    __asm ("" ::: "memory");
+	    THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+	  }
+      }
+      break;
+#endif  /* __NR_futex.  */
+
+    case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+    case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PP_NORMAL_NP:
+    case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+      {
+	/* See concurrency notes regarding __kind in struct __pthread_mutex_s
+	   in sysdeps/nptl/bits/thread-shared-types.h.  */
+	int kind = atomic_load_relaxed (&(mutex->__data.__kind))
+	  & PTHREAD_MUTEX_KIND_MASK_NP;
+
+	oldval = mutex->__data.__lock;
+
+	/* Check whether we already hold the mutex.  */
+	if (mutex->__data.__owner == id)
+	  {
+	    if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+	      return EDEADLK;
+
+	    if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+	      {
+		/* Just bump the counter.  */
+		if (__glibc_unlikely (mutex->__data.__count + 1 == 0))
+		  /* Overflow of the counter.  */
+		  return EAGAIN;
+
+		++mutex->__data.__count;
+
+		return 0;
+	      }
+	  }
+
+	int oldprio = -1, ceilval;
+	do
+	  {
+	    int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+			  >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+	    if (__pthread_current_priority () > ceiling)
+	      {
+		if (oldprio != -1)
+		  __pthread_tpp_change_priority (oldprio, -1);
+		return EINVAL;
+	      }
+
+	    int retval = __pthread_tpp_change_priority (oldprio, ceiling);
+	    if (retval)
+	      return retval;
+
+	    ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+	    oldprio = ceiling;
+
+	    oldval
+	      = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+#ifdef NO_INCR
+						     ceilval | 2,
+#else
+						     ceilval | 1,
+#endif
+						     ceilval);
+
+	    if (oldval == ceilval)
+	      break;
+
+	    do
+	      {
+		oldval
+		  = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+							 ceilval | 2,
+							 ceilval | 1);
+
+		if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
+		  break;
+
+		if (oldval != ceilval)
+		  lll_futex_wait (&mutex->__data.__lock, ceilval | 2,
+				  PTHREAD_MUTEX_PSHARED (mutex));
+	      }
+	    while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+							ceilval | 2, ceilval)
+		   != ceilval);
+	  }
+	while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
+
+	assert (mutex->__data.__owner == 0);
+	mutex->__data.__count = 1;
+      }
+      break;
+
+    default:
+      /* Correct code cannot set any other type.  */
+      return EINVAL;
+    }
+
+  /* Record the ownership.  */
+  mutex->__data.__owner = id;
+#ifndef NO_INCR
+  ++mutex->__data.__nusers;
+#endif
+
+  LIBC_PROBE (mutex_acquired, 1, mutex);
+
+  return 0;
+}
+#ifndef __pthread_mutex_lock
+weak_alias (__pthread_mutex_lock, pthread_mutex_lock)
+hidden_def (__pthread_mutex_lock)
+#endif
+
+
+#ifdef NO_INCR
+void
+__pthread_mutex_cond_lock_adjust (pthread_mutex_t *mutex)
+{
+  /* See concurrency notes regarding __kind in struct __pthread_mutex_s
+     in sysdeps/nptl/bits/thread-shared-types.h.  */
+  int mutex_kind = atomic_load_relaxed (&(mutex->__data.__kind));
+  assert ((mutex_kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) != 0);
+  assert ((mutex_kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0);
+  assert ((mutex_kind & PTHREAD_MUTEX_PSHARED_BIT) == 0);
+
+  /* Record the ownership.  */
+  pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
+  mutex->__data.__owner = id;
+
+  if (mutex_kind == PTHREAD_MUTEX_PI_RECURSIVE_NP)
+    ++mutex->__data.__count;
+}
+#endif
diff --git a/nptl_2_17/pthread_mutex_unlock_2_17.c b/nptl_2_17/pthread_mutex_unlock_2_17.c
new file mode 100644
index 00000000..18ba158e
--- /dev/null
+++ b/nptl_2_17/pthread_mutex_unlock_2_17.c
@@ -0,0 +1,360 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <lowlevellock.h>
+#include <stap-probe.h>
+#include <futex-internal.h>
+
+#ifndef lll_unlock_elision
+#define lll_unlock_elision(a,b,c) ({ lll_unlock (a,c); 0; })
+#endif
+
+static int
+__pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
+     __attribute_noinline__;
+
+int
+attribute_hidden
+__pthread_mutex_unlock_usercnt (pthread_mutex_t *mutex, int decr)
+{
+  /* See concurrency notes regarding mutex type which is loaded from __kind
+     in struct __pthread_mutex_s in sysdeps/nptl/bits/thread-shared-types.h.  */
+  int type = PTHREAD_MUTEX_TYPE_ELISION (mutex);
+  if (__builtin_expect (type
+			& ~(PTHREAD_MUTEX_KIND_MASK_NP
+			    |PTHREAD_MUTEX_ELISION_FLAGS_NP), 0))
+    return __pthread_mutex_unlock_full (mutex, decr);
+
+  if (__builtin_expect (type, PTHREAD_MUTEX_TIMED_NP)
+      == PTHREAD_MUTEX_TIMED_NP)
+    {
+      /* Always reset the owner field.  */
+    normal:
+      mutex->__data.__owner = 0;
+      if (decr)
+	/* One less user.  */
+	--mutex->__data.__nusers;
+
+      /* Unlock.  */
+      lll_unlock (mutex->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex));
+
+      LIBC_PROBE (mutex_release, 1, mutex);
+
+      return 0;
+    }
+  else if (__glibc_likely (type == PTHREAD_MUTEX_TIMED_ELISION_NP))
+    {
+      /* Don't reset the owner/users fields for elision.  */
+      return lll_unlock_elision (mutex->__data.__lock, mutex->__data.__elision,
+				      PTHREAD_MUTEX_PSHARED (mutex));
+    }
+  else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex)
+			      == PTHREAD_MUTEX_RECURSIVE_NP, 1))
+    {
+      /* Recursive mutex.  */
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+	return EPERM;
+
+      if (--mutex->__data.__count != 0)
+	/* We still hold the mutex.  */
+	return 0;
+      goto normal;
+    }
+  else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex)
+			      == PTHREAD_MUTEX_ADAPTIVE_NP, 1))
+    goto normal;
+  else
+    {
+      /* Error checking mutex.  */
+      assert (type == PTHREAD_MUTEX_ERRORCHECK_NP);
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)
+	  || ! lll_islocked (mutex->__data.__lock))
+	return EPERM;
+      goto normal;
+    }
+}
+
+
+static int
+__pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
+{
+  int newowner = 0;
+  int private;
+
+  switch (PTHREAD_MUTEX_TYPE (mutex))
+    {
+    case PTHREAD_MUTEX_ROBUST_RECURSIVE_NP:
+      /* Recursive mutex.  */
+      if ((mutex->__data.__lock & FUTEX_TID_MASK)
+	  == THREAD_GETMEM (THREAD_SELF, tid)
+	  && __builtin_expect (mutex->__data.__owner
+			       == PTHREAD_MUTEX_INCONSISTENT, 0))
+	{
+	  if (--mutex->__data.__count != 0)
+	    /* We still hold the mutex.  */
+	    return ENOTRECOVERABLE;
+
+	  goto notrecoverable;
+	}
+
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+	return EPERM;
+
+      if (--mutex->__data.__count != 0)
+	/* We still hold the mutex.  */
+	return 0;
+
+      goto robust;
+
+    case PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_ROBUST_NORMAL_NP:
+    case PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP:
+      if ((mutex->__data.__lock & FUTEX_TID_MASK)
+	  != THREAD_GETMEM (THREAD_SELF, tid)
+	  || ! lll_islocked (mutex->__data.__lock))
+	return EPERM;
+
+      /* If the previous owner died and the caller did not succeed in
+	 making the state consistent, mark the mutex as unrecoverable
+	 and make all waiters.  */
+      if (__builtin_expect (mutex->__data.__owner
+			    == PTHREAD_MUTEX_INCONSISTENT, 0))
+      notrecoverable:
+	newowner = PTHREAD_MUTEX_NOTRECOVERABLE;
+
+    robust:
+      /* Remove mutex from the list.  */
+      THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+		     &mutex->__data.__list.__next);
+      /* We must set op_pending before we dequeue the mutex.  Also see
+	 comments at ENQUEUE_MUTEX.  */
+      __asm ("" ::: "memory");
+      DEQUEUE_MUTEX (mutex);
+
+      mutex->__data.__owner = newowner;
+      if (decr)
+	/* One less user.  */
+	--mutex->__data.__nusers;
+
+      /* Unlock by setting the lock to 0 (not acquired); if the lock had
+	 FUTEX_WAITERS set previously, then wake any waiters.
+         The unlock operation must be the last access to the mutex to not
+         violate the mutex destruction requirements (see __lll_unlock).  */
+      private = PTHREAD_ROBUST_MUTEX_PSHARED (mutex);
+      if (__glibc_unlikely ((atomic_exchange_rel (&mutex->__data.__lock, 0)
+			     & FUTEX_WAITERS) != 0))
+	lll_futex_wake (&mutex->__data.__lock, 1, private);
+
+      /* We must clear op_pending after we release the mutex.
+	 FIXME However, this violates the mutex destruction requirements
+	 because another thread could acquire the mutex, destroy it, and
+	 reuse the memory for something else; then, if this thread crashes,
+	 and the memory happens to have a value equal to the TID, the kernel
+	 will believe it is still related to the mutex (which has been
+	 destroyed already) and will modify some other random object.  */
+      __asm ("" ::: "memory");
+      THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+      break;
+
+    /* The PI support requires the Linux futex system call.  If that's not
+       available, pthread_mutex_init should never have allowed the type to
+       be set.  So it will get the default case for an invalid type.  */
+#ifdef __NR_futex
+    case PTHREAD_MUTEX_PI_RECURSIVE_NP:
+      /* Recursive mutex.  */
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+	return EPERM;
+
+      if (--mutex->__data.__count != 0)
+	/* We still hold the mutex.  */
+	return 0;
+      goto continue_pi_non_robust;
+
+    case PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP:
+      /* Recursive mutex.  */
+      if ((mutex->__data.__lock & FUTEX_TID_MASK)
+	  == THREAD_GETMEM (THREAD_SELF, tid)
+	  && __builtin_expect (mutex->__data.__owner
+			       == PTHREAD_MUTEX_INCONSISTENT, 0))
+	{
+	  if (--mutex->__data.__count != 0)
+	    /* We still hold the mutex.  */
+	    return ENOTRECOVERABLE;
+
+	  goto pi_notrecoverable;
+	}
+
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+	return EPERM;
+
+      if (--mutex->__data.__count != 0)
+	/* We still hold the mutex.  */
+	return 0;
+
+      goto continue_pi_robust;
+
+    case PTHREAD_MUTEX_PI_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PI_NORMAL_NP:
+    case PTHREAD_MUTEX_PI_ADAPTIVE_NP:
+    case PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP:
+    case PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP:
+      if ((mutex->__data.__lock & FUTEX_TID_MASK)
+	  != THREAD_GETMEM (THREAD_SELF, tid)
+	  || ! lll_islocked (mutex->__data.__lock))
+	return EPERM;
+
+      /* If the previous owner died and the caller did not succeed in
+	 making the state consistent, mark the mutex as unrecoverable
+	 and make all waiters.  */
+      /* See concurrency notes regarding __kind in struct __pthread_mutex_s
+	 in sysdeps/nptl/bits/thread-shared-types.h.  */
+      if ((atomic_load_relaxed (&(mutex->__data.__kind))
+	   & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0
+	  && __builtin_expect (mutex->__data.__owner
+			       == PTHREAD_MUTEX_INCONSISTENT, 0))
+      pi_notrecoverable:
+       newowner = PTHREAD_MUTEX_NOTRECOVERABLE;
+
+      /* See concurrency notes regarding __kind in struct __pthread_mutex_s
+	 in sysdeps/nptl/bits/thread-shared-types.h.  */
+      if ((atomic_load_relaxed (&(mutex->__data.__kind))
+	   & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0)
+	{
+	continue_pi_robust:
+	  /* Remove mutex from the list.
+	     Note: robust PI futexes are signaled by setting bit 0.  */
+	  THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+			 (void *) (((uintptr_t) &mutex->__data.__list.__next)
+				   | 1));
+	  /* We must set op_pending before we dequeue the mutex.  Also see
+	     comments at ENQUEUE_MUTEX.  */
+	  __asm ("" ::: "memory");
+	  DEQUEUE_MUTEX (mutex);
+	}
+
+    continue_pi_non_robust:
+      mutex->__data.__owner = newowner;
+      if (decr)
+	/* One less user.  */
+	--mutex->__data.__nusers;
+
+      /* Unlock.  Load all necessary mutex data before releasing the mutex
+	 to not violate the mutex destruction requirements (see
+	 lll_unlock).  */
+      /* See concurrency notes regarding __kind in struct __pthread_mutex_s
+	 in sysdeps/nptl/bits/thread-shared-types.h.  */
+      int robust = atomic_load_relaxed (&(mutex->__data.__kind))
+	& PTHREAD_MUTEX_ROBUST_NORMAL_NP;
+      private = (robust
+		 ? PTHREAD_ROBUST_MUTEX_PSHARED (mutex)
+		 : PTHREAD_MUTEX_PSHARED (mutex));
+      /* Unlock the mutex using a CAS unless there are futex waiters or our
+	 TID is not the value of __lock anymore, in which case we let the
+	 kernel take care of the situation.  Use release MO in the CAS to
+	 synchronize with acquire MO in lock acquisitions.  */
+      int l = atomic_load_relaxed (&mutex->__data.__lock);
+      do
+	{
+	  if (((l & FUTEX_WAITERS) != 0)
+	      || (l != THREAD_GETMEM (THREAD_SELF, tid)))
+	    {
+	      futex_unlock_pi ((unsigned int *) &mutex->__data.__lock,
+			       private);
+	      break;
+	    }
+	}
+      while (!atomic_compare_exchange_weak_release (&mutex->__data.__lock,
+						    &l, 0));
+
+      /* This happens after the kernel releases the mutex but violates the
+	 mutex destruction requirements; see comments in the code handling
+	 PTHREAD_MUTEX_ROBUST_NORMAL_NP.  */
+      THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+      break;
+#endif  /* __NR_futex.  */
+
+    case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+      /* Recursive mutex.  */
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+	return EPERM;
+
+      if (--mutex->__data.__count != 0)
+	/* We still hold the mutex.  */
+	return 0;
+      goto pp;
+
+    case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+      /* Error checking mutex.  */
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)
+	  || (mutex->__data.__lock & ~ PTHREAD_MUTEX_PRIO_CEILING_MASK) == 0)
+	return EPERM;
+      /* FALLTHROUGH */
+
+    case PTHREAD_MUTEX_PP_NORMAL_NP:
+    case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+      /* Always reset the owner field.  */
+    pp:
+      mutex->__data.__owner = 0;
+
+      if (decr)
+	/* One less user.  */
+	--mutex->__data.__nusers;
+
+      /* Unlock.  Use release MO in the CAS to synchronize with acquire MO in
+	 lock acquisitions.  */
+      int newval;
+      int oldval = atomic_load_relaxed (&mutex->__data.__lock);
+      do
+	{
+	  newval = oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK;
+	}
+      while (!atomic_compare_exchange_weak_release (&mutex->__data.__lock,
+						    &oldval, newval));
+
+      if ((oldval & ~PTHREAD_MUTEX_PRIO_CEILING_MASK) > 1)
+	lll_futex_wake (&mutex->__data.__lock, 1,
+			PTHREAD_MUTEX_PSHARED (mutex));
+
+      int oldprio = newval >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+      LIBC_PROBE (mutex_release, 1, mutex);
+
+      return __pthread_tpp_change_priority (oldprio, -1);
+
+    default:
+      /* Correct code cannot set any other type.  */
+      return EINVAL;
+    }
+
+  LIBC_PROBE (mutex_release, 1, mutex);
+  return 0;
+}
+
+
+int
+__pthread_mutex_unlock (pthread_mutex_t *mutex)
+{
+  return __pthread_mutex_unlock_usercnt (mutex, 1);
+}
+weak_alias (__pthread_mutex_unlock, pthread_mutex_unlock)
+hidden_def (__pthread_mutex_unlock)
diff --git a/nptl_2_17/pthreadtypes_2_17.h b/nptl_2_17/pthreadtypes_2_17.h
new file mode 100644
index 00000000..0483e44a
--- /dev/null
+++ b/nptl_2_17/pthreadtypes_2_17.h
@@ -0,0 +1,179 @@
+/* Copyright (C) 2002-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _INTERNALTYPES_H
+#define _INTERNALTYPES_H	1
+
+#include <stdint.h>
+#include <atomic.h>
+#include <endian.h>
+
+
+struct pthread_attr
+{
+  /* Scheduler parameters and priority.  */
+  struct sched_param schedparam;
+  int schedpolicy;
+  /* Various flags like detachstate, scope, etc.  */
+  int flags;
+  /* Size of guard area.  */
+  size_t guardsize;
+  /* Stack handling.  */
+  void *stackaddr;
+  size_t stacksize;
+  /* Affinity map.  */
+  cpu_set_t *cpuset;
+  size_t cpusetsize;
+};
+
+#define ATTR_FLAG_DETACHSTATE		0x0001
+#define ATTR_FLAG_NOTINHERITSCHED	0x0002
+#define ATTR_FLAG_SCOPEPROCESS		0x0004
+#define ATTR_FLAG_STACKADDR		0x0008
+#define ATTR_FLAG_OLDATTR		0x0010
+#define ATTR_FLAG_SCHED_SET		0x0020
+#define ATTR_FLAG_POLICY_SET		0x0040
+
+
+/* Mutex attribute data structure.  */
+struct pthread_mutexattr
+{
+  /* Identifier for the kind of mutex.
+
+     Bit 31 is set if the mutex is to be shared between processes.
+
+     Bit 0 to 30 contain one of the PTHREAD_MUTEX_ values to identify
+     the type of the mutex.  */
+  int mutexkind;
+};
+
+
+/* Conditional variable attribute data structure.  */
+struct pthread_condattr
+{
+  /* Combination of values:
+
+     Bit 0                : flag whether conditional variable will be
+                            sharable between processes.
+     Bit 1-COND_CLOCK_BITS: Clock ID.  COND_CLOCK_BITS is the number of bits
+                            needed to represent the ID of the clock.  */
+  int value;
+};
+#define COND_CLOCK_BITS	1
+#define COND_NWAITERS_SHIFT    1
+
+/* Read-write lock variable attribute data structure.  */
+struct pthread_rwlockattr
+{
+  int lockkind;
+  int pshared;
+};
+
+
+/* Barrier data structure.  See pthread_barrier_wait for a description
+   of how these fields are used.  */
+struct pthread_barrier
+{
+  unsigned int in;
+  unsigned int current_round;
+  unsigned int count;
+  int shared;
+  unsigned int out;
+};
+/* See pthread_barrier_wait for a description.  */
+#define BARRIER_IN_THRESHOLD (UINT_MAX/2)
+
+
+/* Barrier variable attribute data structure.  */
+struct pthread_barrierattr
+{
+  int pshared;
+};
+
+
+/* Thread-local data handling.  */
+struct pthread_key_struct
+{
+  /* Sequence numbers.  Even numbers indicated vacant entries.  Note
+     that zero is even.  We use uintptr_t to not require padding on
+     32- and 64-bit machines.  On 64-bit machines it helps to avoid
+     wrapping, too.  */
+  uintptr_t seq;
+
+  /* Destructor for the data.  */
+  void (*destr) (void *);
+};
+
+/* Check whether an entry is unused.  */
+#define KEY_UNUSED(p) (((p) & 1) == 0)
+/* Check whether a key is usable.  We cannot reuse an allocated key if
+   the sequence counter would overflow after the next destroy call.
+   This would mean that we potentially free memory for a key with the
+   same sequence.  This is *very* unlikely to happen, A program would
+   have to create and destroy a key 2^31 times (on 32-bit platforms,
+   on 64-bit platforms that would be 2^63).  If it should happen we
+   simply don't use this specific key anymore.  */
+#define KEY_USABLE(p) (((uintptr_t) (p)) < ((uintptr_t) ((p) + 2)))
+
+
+/* Handling of read-write lock data.  */
+// XXX For now there is only one flag.  Maybe more in future.
+#define RWLOCK_RECURSIVE(rwlock) ((rwlock)->__data.__flags != 0)
+
+
+/* Semaphore variable structure.  */
+struct new_sem
+{
+#if __HAVE_64B_ATOMICS
+  /* The data field holds both value (in the least-significant 32 bits) and
+     nwaiters.  */
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+#  define SEM_VALUE_OFFSET 0
+# elif __BYTE_ORDER == __BIG_ENDIAN
+#  define SEM_VALUE_OFFSET 1
+# else
+# error Unsupported byte order.
+# endif
+# define SEM_NWAITERS_SHIFT 32
+# define SEM_VALUE_MASK (~(unsigned int)0)
+  uint64_t data;
+  int private;
+  int pad;
+#else
+# define SEM_VALUE_SHIFT 1
+# define SEM_NWAITERS_MASK ((unsigned int)1)
+  unsigned int value;
+  int private;
+  int pad;
+  unsigned int nwaiters;
+#endif
+};
+
+struct old_sem
+{
+  unsigned int value;
+};
+
+
+/* Compatibility type for old conditional variable interfaces.  */
+typedef struct
+{
+  pthread_cond_t *cond;
+} pthread_cond_2_0_t;
+
+#endif	/* internaltypes.h */
diff --git a/nptl_2_17/tpp_2_17.c b/nptl_2_17/tpp_2_17.c
new file mode 100644
index 00000000..56357ea3
--- /dev/null
+++ b/nptl_2_17/tpp_2_17.c
@@ -0,0 +1,195 @@
+/* Thread Priority Protect helpers.
+   Copyright (C) 2006-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <atomic.h>
+#include <errno.h>
+#include <pthreadP.h>
+#include <sched.h>
+#include <stdlib.h>
+#include <atomic.h>
+
+
+int __sched_fifo_min_prio = -1;
+int __sched_fifo_max_prio = -1;
+
+/* We only want to initialize __sched_fifo_min_prio and __sched_fifo_max_prio
+   once.  The standard solution would be similar to pthread_once, but then
+   readers would need to use an acquire fence.  In this specific case,
+   initialization is comprised of just idempotent writes to two variables
+   that have an initial value of -1.  Therefore, we can treat each variable as
+   a separate, at-least-once initialized value.  This enables using just
+   relaxed MO loads and stores, but requires that consumers check for
+   initialization of each value that is to be used; see
+   __pthread_tpp_change_priority for an example.
+ */
+void
+__init_sched_fifo_prio (void)
+{
+  atomic_store_relaxed (&__sched_fifo_max_prio,
+			__sched_get_priority_max (SCHED_FIFO));
+  atomic_store_relaxed (&__sched_fifo_min_prio,
+			__sched_get_priority_min (SCHED_FIFO));
+}
+
+int
+__pthread_tpp_change_priority (int previous_prio, int new_prio)
+{
+  struct pthread *self = THREAD_SELF;
+  struct priority_protection_data *tpp = THREAD_GETMEM (self, tpp);
+  int fifo_min_prio = atomic_load_relaxed (&__sched_fifo_min_prio);
+  int fifo_max_prio = atomic_load_relaxed (&__sched_fifo_max_prio);
+
+  if (tpp == NULL)
+    {
+      /* See __init_sched_fifo_prio.  We need both the min and max prio,
+         so need to check both, and run initialization if either one is
+         not initialized.  The memory model's write-read coherence rule
+         makes this work.  */
+      if (fifo_min_prio == -1 || fifo_max_prio == -1)
+	{
+	  __init_sched_fifo_prio ();
+	  fifo_min_prio = atomic_load_relaxed (&__sched_fifo_min_prio);
+	  fifo_max_prio = atomic_load_relaxed (&__sched_fifo_max_prio);
+	}
+
+      size_t size = sizeof *tpp;
+      size += (fifo_max_prio - fifo_min_prio + 1)
+	      * sizeof (tpp->priomap[0]);
+      tpp = calloc (size, 1);
+      if (tpp == NULL)
+	return ENOMEM;
+      tpp->priomax = fifo_min_prio - 1;
+      THREAD_SETMEM (self, tpp, tpp);
+    }
+
+  assert (new_prio == -1
+	  || (new_prio >= fifo_min_prio
+	      && new_prio <= fifo_max_prio));
+  assert (previous_prio == -1
+	  || (previous_prio >= fifo_min_prio
+	      && previous_prio <= fifo_max_prio));
+
+  int priomax = tpp->priomax;
+  int newpriomax = priomax;
+  if (new_prio != -1)
+    {
+      if (tpp->priomap[new_prio - fifo_min_prio] + 1 == 0)
+	return EAGAIN;
+      ++tpp->priomap[new_prio - fifo_min_prio];
+      if (new_prio > priomax)
+	newpriomax = new_prio;
+    }
+
+  if (previous_prio != -1)
+    {
+      if (--tpp->priomap[previous_prio - fifo_min_prio] == 0
+	  && priomax == previous_prio
+	  && previous_prio > new_prio)
+	{
+	  int i;
+	  for (i = previous_prio - 1; i >= fifo_min_prio; --i)
+	    if (tpp->priomap[i - fifo_min_prio])
+	      break;
+	  newpriomax = i;
+	}
+    }
+
+  if (priomax == newpriomax)
+    return 0;
+
+  /* See CREATE THREAD NOTES in nptl/pthread_create.c.  */
+  lll_lock (self->lock, LLL_PRIVATE);
+
+  tpp->priomax = newpriomax;
+
+  int result = 0;
+
+  if ((self->flags & ATTR_FLAG_SCHED_SET) == 0)
+    {
+      if (__sched_getparam (self->tid, &self->schedparam) != 0)
+	result = errno;
+      else
+	self->flags |= ATTR_FLAG_SCHED_SET;
+    }
+
+  if ((self->flags & ATTR_FLAG_POLICY_SET) == 0)
+    {
+      self->schedpolicy = __sched_getscheduler (self->tid);
+      if (self->schedpolicy == -1)
+	result = errno;
+      else
+	self->flags |= ATTR_FLAG_POLICY_SET;
+    }
+
+  if (result == 0)
+    {
+      struct sched_param sp = self->schedparam;
+      if (sp.sched_priority < newpriomax || sp.sched_priority < priomax)
+	{
+	  if (sp.sched_priority < newpriomax)
+	    sp.sched_priority = newpriomax;
+
+	  if (__sched_setscheduler (self->tid, self->schedpolicy, &sp) < 0)
+	    result = errno;
+	}
+    }
+
+  lll_unlock (self->lock, LLL_PRIVATE);
+
+  return result;
+}
+
+int
+__pthread_current_priority (void)
+{
+  struct pthread *self = THREAD_SELF;
+  if ((self->flags & (ATTR_FLAG_POLICY_SET | ATTR_FLAG_SCHED_SET))
+      == (ATTR_FLAG_POLICY_SET | ATTR_FLAG_SCHED_SET))
+    return self->schedparam.sched_priority;
+
+  int result = 0;
+
+  /* See CREATE THREAD NOTES in nptl/pthread_create.c.  */
+  lll_lock (self->lock, LLL_PRIVATE);
+
+  if ((self->flags & ATTR_FLAG_SCHED_SET) == 0)
+    {
+      if (__sched_getparam (self->tid, &self->schedparam) != 0)
+	result = -1;
+      else
+	self->flags |= ATTR_FLAG_SCHED_SET;
+    }
+
+  if ((self->flags & ATTR_FLAG_POLICY_SET) == 0)
+    {
+      self->schedpolicy = __sched_getscheduler (self->tid);
+      if (self->schedpolicy == -1)
+	result = -1;
+      else
+	self->flags |= ATTR_FLAG_POLICY_SET;
+    }
+
+  if (result != -1)
+    result = self->schedparam.sched_priority;
+
+  lll_unlock (self->lock, LLL_PRIVATE);
+
+  return result;
+}
diff --git a/nptl_2_17/unwind_2_17.c b/nptl_2_17/unwind_2_17.c
new file mode 100644
index 00000000..1534540c
--- /dev/null
+++ b/nptl_2_17/unwind_2_17.c
@@ -0,0 +1,138 @@
+/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>
+   and Richard Henderson <rth@redhat.com>, 2003.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include "pthreadP_2_17.h"
+#include <setjmp.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <jmpbuf-unwind.h>
+
+#ifdef _STACK_GROWS_DOWN
+# define FRAME_LEFT(frame, other, adj) \
+  ((uintptr_t) frame - adj >= (uintptr_t) other - adj)
+#elif _STACK_GROWS_UP
+# define FRAME_LEFT(frame, other, adj) \
+  ((uintptr_t) frame - adj <= (uintptr_t) other - adj)
+#else
+# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
+#endif
+
+static _Unwind_Reason_Code
+unwind_stop (int version, _Unwind_Action actions,
+	     _Unwind_Exception_Class exc_class,
+	     struct _Unwind_Exception *exc_obj,
+	     struct _Unwind_Context *context, void *stop_parameter)
+{
+  struct pthread_unwind_buf *buf = stop_parameter;
+  struct pthread *self = THREAD_SELF;
+  struct _pthread_cleanup_buffer *curp = THREAD_GETMEM (self, cleanup);
+  int do_longjump = 0;
+
+  /* Adjust all pointers used in comparisons, so that top of thread's
+     stack is at the top of address space.  Without that, things break
+     if stack is allocated above the main stack.  */
+  uintptr_t adj = (uintptr_t) self->stackblock + self->stackblock_size;
+
+  /* Do longjmp if we're at "end of stack", aka "end of unwind data".
+     We assume there are only C frame without unwind data in between
+     here and the jmp_buf target.  Otherwise simply note that the CFA
+     of a function is NOT within it's stack frame; it's the SP of the
+     previous frame.  */
+  if ((actions & _UA_END_OF_STACK)
+      || ! _JMPBUF_CFA_UNWINDS_ADJ (buf->cancel_jmp_buf[0].jmp_buf, context,
+				    adj))
+    do_longjump = 1;
+
+  if (__glibc_unlikely (curp != NULL))
+    {
+      /* Handle the compatibility stuff.  Execute all handlers
+	 registered with the old method which would be unwound by this
+	 step.  */
+      struct _pthread_cleanup_buffer *oldp = buf->priv.data.cleanup;
+      void *cfa = (void *) (_Unwind_Ptr) _Unwind_GetCFA (context);
+
+      if (curp != oldp && (do_longjump || FRAME_LEFT (cfa, curp, adj)))
+	{
+	  do
+	    {
+	      /* Pointer to the next element.  */
+	      struct _pthread_cleanup_buffer *nextp = curp->__prev;
+
+	      /* Call the handler.  */
+	      curp->__routine (curp->__arg);
+
+	      /* To the next.  */
+	      curp = nextp;
+	    }
+	  while (curp != oldp
+		 && (do_longjump || FRAME_LEFT (cfa, curp, adj)));
+
+	  /* Mark the current element as handled.  */
+	  THREAD_SETMEM (self, cleanup, curp);
+	}
+    }
+
+  if (do_longjump)
+    __libc_unwind_longjmp ((struct __jmp_buf_tag *) buf->cancel_jmp_buf, 1);
+
+  return _URC_NO_REASON;
+}
+
+
+static void
+unwind_cleanup (_Unwind_Reason_Code reason, struct _Unwind_Exception *exc)
+{
+  /* When we get here a C++ catch block didn't rethrow the object.  We
+     cannot handle this case and therefore abort.  */
+  __libc_fatal ("FATAL: exception not rethrown\n");
+}
+
+
+void
+__cleanup_fct_attribute __attribute ((noreturn))
+__pthread_unwind (__pthread_unwind_buf_t *buf)
+{
+  struct pthread_unwind_buf *ibuf = (struct pthread_unwind_buf *) buf;
+  struct pthread *self = THREAD_SELF;
+
+  /* This is not a catchable exception, so don't provide any details about
+     the exception type.  We do need to initialize the field though.  */
+  THREAD_SETMEM (self, exc.exception_class, 0);
+  THREAD_SETMEM (self, exc.exception_cleanup, &unwind_cleanup);
+
+  _Unwind_ForcedUnwind (&self->exc, unwind_stop, ibuf);
+  /* NOTREACHED */
+
+  /* We better do not get here.  */
+  abort ();
+}
+hidden_def (__pthread_unwind)
+
+
+void
+__cleanup_fct_attribute __attribute ((noreturn))
+__pthread_unwind_next (__pthread_unwind_buf_t *buf)
+{
+  struct pthread_unwind_buf *ibuf = (struct pthread_unwind_buf *) buf;
+
+  __pthread_unwind ((__pthread_unwind_buf_t *) ibuf->priv.data.prev);
+}
+hidden_def (__pthread_unwind_next)
diff --git a/nptl_2_17/vars_2_17.c b/nptl_2_17/vars_2_17.c
new file mode 100644
index 00000000..295d7e33
--- /dev/null
+++ b/nptl_2_17/vars_2_17.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 2004-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <pthreadP_2_17.h>
+#include <stdlib.h>
+#include <tls.h>
+#include <unistd.h>
+
+/* Default thread attributes for the case when the user does not
+   provide any.  */
+struct pthread_attr __default_pthread_attr attribute_hidden;
+
+/* Mutex protecting __default_pthread_attr.  */
+int __default_pthread_attr_lock = LLL_LOCK_INITIALIZER;
+
+/* Flag whether the machine is SMP or not.  */
+int __is_smp attribute_hidden;
+
+#ifndef TLS_MULTIPLE_THREADS_IN_TCB
+/* Variable set to a nonzero value either if more than one thread runs or ran,
+   or if a single-threaded process is trying to cancel itself.  See
+   nptl/descr.h for more context on the single-threaded process case.  */
+int __pthread_multiple_threads attribute_hidden;
+#endif
+
+/* Table of the key information.  */
+struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX]
+  __attribute__ ((nocommon));
+hidden_data_def (__pthread_keys)
-- 
2.23.0

