Attachment 151071 Details for Bug 196354 – dlopenable libthr

[patch] dlopenable libthr

1.patch (text/plain), 141.82 KB, created by Konstantin Belousov on 2014-12-29 15:46:01 UTC

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Creator: Konstantin Belousov

Created: 2014-12-29 15:46:01 UTC

Size: 141.82 KB

patch

obsolete

> contrib/jemalloc/include/jemalloc/internal/mutex.h |   1 +
> contrib/jemalloc/src/jemalloc.c                    |   7 +
> contrib/jemalloc/src/mutex.c                       |  23 +-
> lib/libc/Makefile                                  |   4 +
> lib/libc/compat-43/Symbol.map                      |   1 +
> lib/libc/compat-43/creat.c                         |  20 +-
> lib/libc/gen/Makefile.inc                          |   1 +
> lib/libc/gen/Symbol.map                            |  11 +
> lib/libc/gen/__pthread_mutex_init_calloc_cb_stub.c |  45 ++
> lib/libc/gen/dlfcn.c                               |   7 +
> lib/libc/gen/pause.c                               |  18 +-
> lib/libc/gen/raise.c                               |  20 +-
> lib/libc/gen/sleep.c                               |  19 +-
> lib/libc/gen/swapcontext.c                         |  55 ---
> lib/libc/gen/termios.c                             |  18 +-
> lib/libc/gen/usleep.c                              |  17 +-
> lib/libc/gen/wait.c                                |  20 +-
> lib/libc/gen/wait3.c                               |  21 +-
> lib/libc/gen/waitpid.c                             |  20 +-
> lib/libc/include/libc_private.h                    | 158 ++++++-
> lib/libc/stdlib/Symbol.map                         |   1 +
> lib/libc/stdlib/jemalloc/Symbol.map                |   1 +
> lib/libc/stdlib/system.c                           |  15 +-
> lib/libc/sys/Makefile.inc                          |  57 ++-
> lib/libc/sys/Symbol.map                            |   4 +
> lib/libc/sys/__error.c                             |  15 +-
> lib/libc/sys/accept.c                              |  50 +++
> lib/libc/sys/accept4.c                             |  50 +++
> lib/libc/sys/aio_suspend.c                         |  51 +++
> lib/libc/sys/close.c                               |  48 ++
> lib/libc/sys/connect.c                             |  50 +++
> lib/libc/sys/fcntl.c                               |  22 +-
> lib/libc/sys/fsync.c                               |  47 ++
> lib/libc/sys/interposing_table.c                   |  92 ++++
> lib/libc/sys/msync.c                               |  49 ++
> lib/libc/sys/nanosleep.c                           |  49 ++
> lib/libc/sys/open.c                                |  59 +++
> lib/libc/sys/openat.c                              |  59 +++
> lib/libc/sys/poll.c                                |  49 ++
> lib/libc/sys/pselect.c                             |  51 +++
> lib/libc/sys/read.c                                |  50 +++
> lib/libc/sys/readv.c                               |  50 +++
> lib/libc/sys/recvfrom.c                            |  53 +++
> lib/libc/sys/recvmsg.c                             |  50 +++
> lib/libc/sys/select.c                              |  49 ++
> lib/libc/sys/sendmsg.c                             |  50 +++
> lib/libc/sys/sendto.c                              |  53 +++
> lib/libc/sys/setcontext.c                          |  49 ++
> lib/libc/sys/sigaction.c                           |  49 ++
> lib/libc/sys/sigprocmask.c                         |  49 ++
> lib/libc/sys/sigsuspend.c                          |  49 ++
> lib/libc/sys/sigtimedwait.c                        |  51 +++
> lib/libc/sys/sigwait.c                             |  14 +-
> lib/libc/sys/sigwaitinfo.c                         |  49 ++
> lib/libc/sys/swapcontext.c                         |  46 ++
> lib/libc/sys/wait4.c                               |  49 ++
> lib/libc/sys/write.c                               |  50 +++
> lib/libc/sys/writev.c                              |  50 +++
> lib/libthr/Makefile                                |   1 -
> lib/libthr/pthread.map                             |  96 ----
> lib/libthr/sys/thr_error.c                         |   3 +-
> lib/libthr/thread/thr_create.c                     |   8 +-
> lib/libthr/thread/thr_init.c                       |  10 +-
> lib/libthr/thread/thr_printf.c                     |   1 +
> lib/libthr/thread/thr_private.h                    |  21 +-
> lib/libthr/thread/thr_sig.c                        | 170 +++----
> lib/libthr/thread/thr_syscalls.c                   | 491 ++++++++++-----------
> libexec/rtld-elf/Symbol.map                        |   1 +
> libexec/rtld-elf/rtld.c                            |  22 +
> libexec/rtld-elf/rtld.h                            |   1 +
> sys/sys/link_elf.h                                 |   1 +
> 71 files changed, 2411 insertions(+), 580 deletions(-)
>
>diff --git a/contrib/jemalloc/include/jemalloc/internal/mutex.h b/contrib/jemalloc/include/jemalloc/internal/mutex.h
>index 564d604..dcd9147 100644
>--- a/contrib/jemalloc/include/jemalloc/internal/mutex.h
>+++ b/contrib/jemalloc/include/jemalloc/internal/mutex.h
>@@ -49,6 +49,7 @@ bool	malloc_mutex_init(malloc_mutex_t *mutex);
> void	malloc_mutex_prefork(malloc_mutex_t *mutex);
> void	malloc_mutex_postfork_parent(malloc_mutex_t *mutex);
> void	malloc_mutex_postfork_child(malloc_mutex_t *mutex);
>+bool	malloc_mutex_first_thread(void);
> bool	mutex_boot(void);
> 
> #endif /* JEMALLOC_H_EXTERNS */
>diff --git a/contrib/jemalloc/src/jemalloc.c b/contrib/jemalloc/src/jemalloc.c
>index 9e5f2df..1ffa064 100644
>--- a/contrib/jemalloc/src/jemalloc.c
>+++ b/contrib/jemalloc/src/jemalloc.c
>@@ -2061,6 +2061,13 @@ jemalloc_postfork_child(void)
> 	ctl_postfork_child();
> }
> 
>+void
>+_malloc_first_thread(void)
>+{
>+
>+	(void)malloc_mutex_first_thread();
>+}
>+
> /******************************************************************************/
> /*
>  * The following functions are used for TLS allocation/deallocation in static
>diff --git a/contrib/jemalloc/src/mutex.c b/contrib/jemalloc/src/mutex.c
>index 6f5954e..0f90d05 100644
>--- a/contrib/jemalloc/src/mutex.c
>+++ b/contrib/jemalloc/src/mutex.c
>@@ -67,15 +67,15 @@ pthread_create(pthread_t *__restrict thread,
> JEMALLOC_EXPORT int	_pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
>     void *(calloc_cb)(size_t, size_t));
> 
>-__weak_reference(_pthread_mutex_init_calloc_cb_stub,
>-    _pthread_mutex_init_calloc_cb);
>-
>+#pragma weak _pthread_mutex_init_calloc_cb
> int
>-_pthread_mutex_init_calloc_cb_stub(pthread_mutex_t *mutex,
>+_pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
>     void *(calloc_cb)(size_t, size_t))
> {
> 
>-	return (0);
>+	return (((int (*)(pthread_mutex_t *, void *(*)(size_t, size_t)))
>+	    __libc_interposing[INTERPOS__pthread_mutex_init_calloc_cb])(
>+	   mutex, calloc_cb));
> }
> #endif
> 
>@@ -144,7 +144,7 @@ malloc_mutex_postfork_child(malloc_mutex_t *mutex)
> }
> 
> bool
>-mutex_boot(void)
>+malloc_mutex_first_thread(void)
> {
> 
> #ifdef JEMALLOC_MUTEX_INIT_CB
>@@ -158,3 +158,14 @@ mutex_boot(void)
> #endif
> 	return (false);
> }
>+
>+bool
>+mutex_boot(void)
>+{
>+
>+#ifndef JEMALLOC_MUTEX_INIT_CB
>+	return (malloc_mutex_first_thread());
>+#else
>+	return (false);
>+#endif
>+}
>diff --git a/lib/libc/Makefile b/lib/libc/Makefile
>index 9853d4b..906ace1 100644
>--- a/lib/libc/Makefile
>+++ b/lib/libc/Makefile
>@@ -156,6 +156,10 @@ libkern.${LIBC_ARCH}:: ${KMSRCS}
> 	cp -fp ${.ALLSRC} ${DESTDIR}/sys/libkern/${LIBC_ARCH}
> .endif
> 
>+.if ${MK_SYSCALL_COMPAT} != "no"
>+CFLAGS+=-DSYSCALL_COMPAT
>+.endif
>+
> .include <bsd.arch.inc.mk>
> 
> .include <bsd.lib.mk>
>diff --git a/lib/libc/compat-43/Symbol.map b/lib/libc/compat-43/Symbol.map
>index bd49f99..2827705 100644
>--- a/lib/libc/compat-43/Symbol.map
>+++ b/lib/libc/compat-43/Symbol.map
>@@ -28,4 +28,5 @@ FBSD_1.2 {
> FBSDprivate_1.0 {
> 	__creat;
> 	_creat;
>+	__libc_creat;
> };
>diff --git a/lib/libc/compat-43/creat.c b/lib/libc/compat-43/creat.c
>index fc3be06..5ee4531 100644
>--- a/lib/libc/compat-43/creat.c
>+++ b/lib/libc/compat-43/creat.c
>@@ -36,11 +36,23 @@ __FBSDID("$FreeBSD$");
> #include "namespace.h"
> #include <fcntl.h>
> #include "un-namespace.h"
>+#include "libc_private.h"
> 
>+__weak_reference(__libc_creat, __creat);
>+__weak_reference(__libc_creat, _creat);
>+
>+#pragma weak creat
> int
>-__creat(const char *path, mode_t mode)
>+creat(const char *path, mode_t mode)
> {
>-	return(_open(path, O_WRONLY|O_CREAT|O_TRUNC, mode));
>+
>+	return (((int (*)(const char *, mode_t))
>+	    __libc_interposing[INTERPOS_creat])(path, mode));
>+}
>+
>+int
>+__libc_creat(const char *path, mode_t mode)
>+{
>+
>+	return(__sys_open(path, O_WRONLY | O_CREAT | O_TRUNC, mode));
> }
>-__weak_reference(__creat, creat);
>-__weak_reference(__creat, _creat);
>diff --git a/lib/libc/gen/Makefile.inc b/lib/libc/gen/Makefile.inc
>index f64caf0..2232b79 100644
>--- a/lib/libc/gen/Makefile.inc
>+++ b/lib/libc/gen/Makefile.inc
>@@ -5,6 +5,7 @@
> .PATH: ${LIBC_SRCTOP}/${LIBC_ARCH}/gen ${LIBC_SRCTOP}/gen
> 
> SRCS+=	__getosreldate.c \
>+	__pthread_mutex_init_calloc_cb_stub.c \
> 	__xuname.c \
> 	_once_stub.c \
> 	_pthread_stubs.c \
>diff --git a/lib/libc/gen/Symbol.map b/lib/libc/gen/Symbol.map
>index 77413d6..d3a2c99 100644
>--- a/lib/libc/gen/Symbol.map
>+++ b/lib/libc/gen/Symbol.map
>@@ -487,6 +487,7 @@ FBSDprivate_1.0 {
> 	_rtld_atfork_post;
> 	_rtld_error;		/* for private use */
> 	_rtld_get_stack_prot;
>+	_rtld_is_dlopened;
> 	_rtld_thread_init;	/* for private use */
> 	__elf_phdr_match_addr;
> 	_err;
>@@ -532,6 +533,16 @@ FBSDprivate_1.0 {
> 	_libc_sem_post_compat;
> 	_libc_sem_getvalue_compat;
> 
>+	__libc_pause;
>+	__libc_raise;
>+	__libc_system;
>+	__libc_sleep;
>+	__libc_tcdrain;
>+	__libc_usleep;
>+	__libc_wait;
>+	__libc_wait3;
>+	__libc_waitpid;
>+
> 	__elf_aux_vector;
> 	__pthread_map_stacks_exec;
> 	__fillcontextx;
>diff --git a/lib/libc/gen/__pthread_mutex_init_calloc_cb_stub.c b/lib/libc/gen/__pthread_mutex_init_calloc_cb_stub.c
>new file mode 100644
>index 0000000..1c566ec
>--- /dev/null
>+++ b/lib/libc/gen/__pthread_mutex_init_calloc_cb_stub.c
>@@ -0,0 +1,45 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <pthread.h>
>+#include "libc_private.h"
>+
>+int
>+_pthread_mutex_init_calloc_cb_stub(pthread_mutex_t *mutex,
>+    void *(calloc_cb)(size_t, size_t))
>+{
>+
>+	return (0);
>+}
>diff --git a/lib/libc/gen/dlfcn.c b/lib/libc/gen/dlfcn.c
>index ad24bb4..5bdf4ab 100644
>--- a/lib/libc/gen/dlfcn.c
>+++ b/lib/libc/gen/dlfcn.c
>@@ -233,3 +233,10 @@ _rtld_get_stack_prot(void)
> 	return (PROT_EXEC | PROT_READ | PROT_WRITE);
> }
> 
>+#pragma weak _rtld_is_dlopened
>+int
>+_rtld_is_dlopened(void *arg)
>+{
>+
>+	return (0);
>+}
>diff --git a/lib/libc/gen/pause.c b/lib/libc/gen/pause.c
>index 51706cf..97fbb01 100644
>--- a/lib/libc/gen/pause.c
>+++ b/lib/libc/gen/pause.c
>@@ -38,11 +38,13 @@ __FBSDID("$FreeBSD$");
> #include <unistd.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
>+
> /*
>  * Backwards compatible pause.
>  */
> int
>-__pause(void)
>+__libc_pause(void)
> {
> 	sigset_t oset;
> 
>@@ -50,5 +52,15 @@ __pause(void)
> 		return (-1);
> 	return (_sigsuspend(&oset));
> }
>-__weak_reference(__pause, pause);
>-__weak_reference(__pause, _pause);
>+
>+#pragma weak pause
>+int
>+pause(void)
>+{
>+
>+	return (((int (*)(void))
>+	    __libc_interposing[INTERPOS_pause])());
>+}
>+
>+__weak_reference(__libc_pause, __pause);
>+__weak_reference(__libc_pause, _pause);
>diff --git a/lib/libc/gen/raise.c b/lib/libc/gen/raise.c
>index b3d0aae..d605639 100644
>--- a/lib/libc/gen/raise.c
>+++ b/lib/libc/gen/raise.c
>@@ -36,11 +36,23 @@ __FBSDID("$FreeBSD$");
> #include <signal.h>
> #include <unistd.h>
> 
>-__weak_reference(__raise, raise);
>-__weak_reference(__raise, _raise);
>+#include "libc_private.h"
> 
>+__weak_reference(__libc_raise, __raise);
>+__weak_reference(__libc_raise, _raise);
>+
>+#pragma weak raise
> int
>-__raise(int s)
>+raise(int s)
> {
>-	return(kill(getpid(), s));
>+
>+	return (((int (*)(int))
>+	    __libc_interposing[INTERPOS_raise])(s));
>+}
>+
>+int
>+__libc_raise(int s)
>+{
>+
>+	return (kill(getpid(), s));
> }
>diff --git a/lib/libc/gen/sleep.c b/lib/libc/gen/sleep.c
>index b807c2d..f558e36 100644
>--- a/lib/libc/gen/sleep.c
>+++ b/lib/libc/gen/sleep.c
>@@ -40,8 +40,19 @@ __FBSDID("$FreeBSD$");
> #include <unistd.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
>+
>+#pragma weak sleep
>+unsigned int
>+sleep(unsigned int seconds)
>+{
>+
>+	return (((unsigned int (*)(unsigned int))
>+	    __libc_interposing[INTERPOS_sleep])(seconds));
>+}
>+
> unsigned int
>-__sleep(unsigned int seconds)
>+__libc_sleep(unsigned int seconds)
> {
> 	struct timespec time_to_sleep;
> 	struct timespec time_remaining;
>@@ -51,7 +62,7 @@ __sleep(unsigned int seconds)
> 	 * the maximum value for a time_t is >= INT_MAX.
> 	 */
> 	if (seconds > INT_MAX)
>-		return (seconds - INT_MAX + __sleep(INT_MAX));
>+		return (seconds - INT_MAX + __libc_sleep(INT_MAX));
> 
> 	time_to_sleep.tv_sec = seconds;
> 	time_to_sleep.tv_nsec = 0;
>@@ -63,5 +74,5 @@ __sleep(unsigned int seconds)
> 		(time_remaining.tv_nsec != 0)); /* round up */
> }
> 
>-__weak_reference(__sleep, sleep);
>-__weak_reference(__sleep, _sleep);
>+__weak_reference(__libc_sleep, __sleep);
>+__weak_reference(__libc_sleep, _sleep);
>diff --git a/lib/libc/gen/swapcontext.c b/lib/libc/gen/swapcontext.c
>deleted file mode 100644
>index c34cb23..0000000
>--- a/lib/libc/gen/swapcontext.c
>+++ /dev/null
>@@ -1,55 +0,0 @@
>-/*
>- * Copyright (c) 2001 Daniel M. Eischen <deischen@freebsd.org>
>- * All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- * 1. Redistributions of source code must retain the above copyright
>- *    notice, this list of conditions and the following disclaimer.
>- * 2. Neither the name of the author nor the names of its contributors
>- *    may be used to endorse or promote products derived from this software
>- *    without specific prior written permission.
>- *
>- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
>- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>- * SUCH DAMAGE.
>- */
>-
>-#include <sys/cdefs.h>
>-__FBSDID("$FreeBSD$");
>-
>-#include <sys/param.h>
>-#include <sys/signal.h>
>-#include <sys/ucontext.h>
>-
>-#include <errno.h>
>-#include <stddef.h>
>-
>-__weak_reference(__swapcontext, swapcontext);
>-
>-int
>-__swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
>-{
>-	int ret;
>-
>-	if ((oucp == NULL) || (ucp == NULL)) {
>-		errno = EINVAL;
>-		return (-1);
>-	}
>-	oucp->uc_flags &= ~UCF_SWAPPED;
>-	ret = getcontext(oucp);
>-	if ((ret == 0) && !(oucp->uc_flags & UCF_SWAPPED)) {
>-		oucp->uc_flags |= UCF_SWAPPED;
>-		ret = setcontext(ucp);
>-	}
>-	return (ret);
>-}
>diff --git a/lib/libc/gen/termios.c b/lib/libc/gen/termios.c
>index 7e9f169..f8b7354 100644
>--- a/lib/libc/gen/termios.c
>+++ b/lib/libc/gen/termios.c
>@@ -46,6 +46,8 @@ __FBSDID("$FreeBSD$");
> #include <unistd.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
>+
> int
> tcgetattr(int fd, struct termios *t)
> {
>@@ -208,13 +210,23 @@ tcsendbreak(int fd, int len __unused)
> }
> 
> int
>-__tcdrain(int fd)
>+__libc_tcdrain(int fd)
> {
>+
> 	return (_ioctl(fd, TIOCDRAIN, 0));
> }
> 
>-__weak_reference(__tcdrain, tcdrain);
>-__weak_reference(__tcdrain, _tcdrain);
>+#pragma weak tcdrain
>+int
>+tcdrain(int fd)
>+{
>+
>+	return (((int (*)(int))
>+	    __libc_interposing[INTERPOS_tcdrain])(fd));
>+}
>+
>+__weak_reference(__libc_tcdrain, __tcdrain);
>+__weak_reference(__libc_tcdrain, _tcdrain);
> 
> int
> tcflush(int fd, int which)
>diff --git a/lib/libc/gen/usleep.c b/lib/libc/gen/usleep.c
>index 7d6559b..1d58b98 100644
>--- a/lib/libc/gen/usleep.c
>+++ b/lib/libc/gen/usleep.c
>@@ -38,8 +38,19 @@ __FBSDID("$FreeBSD$");
> #include <unistd.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
>+
>+#pragma weak usleep
>+int
>+usleep(useconds_t useconds)
>+{
>+
>+	return (((int (*)(useconds_t))
>+	    __libc_interposing[INTERPOS_usleep])(useconds));
>+}
>+
> int
>-__usleep(useconds_t useconds)
>+__libc_usleep(useconds_t useconds)
> {
> 	struct timespec time_to_sleep;
> 
>@@ -48,5 +59,5 @@ __usleep(useconds_t useconds)
> 	return (_nanosleep(&time_to_sleep, NULL));
> }
> 
>-__weak_reference(__usleep, usleep);
>-__weak_reference(__usleep, _usleep);
>+__weak_reference(__libc_usleep, __usleep);
>+__weak_reference(__libc_usleep, _usleep);
>diff --git a/lib/libc/gen/wait.c b/lib/libc/gen/wait.c
>index 2169b9d..dc1351d 100644
>--- a/lib/libc/gen/wait.c
>+++ b/lib/libc/gen/wait.c
>@@ -40,11 +40,23 @@ __FBSDID("$FreeBSD$");
> #include <sys/resource.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
>+
>+#pragma weak wait
> pid_t
>-__wait(int *istat)
>+wait(int *istat)
> {
>-	return (_wait4(WAIT_ANY, istat, 0, (struct rusage *)0));
>+
>+	return (((pid_t (*)(int *))
>+	    __libc_interposing[INTERPOS_wait])(istat));
>+}
>+
>+pid_t
>+__libc_wait(int *istat)
>+{
>+
>+	return (__sys_wait4(WAIT_ANY, istat, 0, NULL));
> }
> 
>-__weak_reference(__wait, wait);
>-__weak_reference(__wait, _wait);
>+__weak_reference(__libc_wait, __wait);
>+__weak_reference(__libc_wait, _wait);
>diff --git a/lib/libc/gen/wait3.c b/lib/libc/gen/wait3.c
>index 6098773..2e116be 100644
>--- a/lib/libc/gen/wait3.c
>+++ b/lib/libc/gen/wait3.c
>@@ -40,11 +40,22 @@ __FBSDID("$FreeBSD$");
> #include <sys/resource.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
>+
>+#pragma weak wait3
>+pid_t
>+wait3(int *istat, int options, struct rusage *rup)
>+{
>+
>+	return (((pid_t (*)(int *, int, struct rusage *))
>+	    __libc_interposing[INTERPOS_wait3])(istat, options, rup));
>+}
>+
>+__weak_reference(__libc_wait3, __wait3);
>+
> pid_t
>-wait3(istat, options, rup)
>-	int *istat;
>-	int options;
>-	struct rusage *rup;
>+__libc_wait3(int *istat, int options, struct rusage *rup)
> {
>-	return (_wait4(WAIT_ANY, istat, options, rup));
>+
>+	return (__sys_wait4(WAIT_ANY, istat, options, rup));
> }
>diff --git a/lib/libc/gen/waitpid.c b/lib/libc/gen/waitpid.c
>index b001837..27e920f 100644
>--- a/lib/libc/gen/waitpid.c
>+++ b/lib/libc/gen/waitpid.c
>@@ -40,11 +40,23 @@ __FBSDID("$FreeBSD$");
> #include <sys/resource.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
>+
>+#pragma weak waitpid
> pid_t
>-__waitpid(pid_t pid, int *istat, int options)
>+waitpid(pid_t pid, int *istat, int options)
> {
>-	return (_wait4(pid, istat, options, (struct rusage *)0));
>+
>+	return (((pid_t (*)(pid_t, int *, int))
>+	    __libc_interposing[INTERPOS_waitpid])(pid, istat, options));
>+}
>+
>+pid_t
>+__libc_waitpid(pid_t pid, int *istat, int options)
>+{
>+
>+	return (__sys_wait4(pid, istat, options, NULL));
> }
> 
>-__weak_reference(__waitpid, waitpid);
>-__weak_reference(__waitpid, _waitpid);
>+__weak_reference(__libc_waitpid, __waitpid);
>+__weak_reference(__libc_waitpid, _waitpid);
>diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h
>index 40a5f72..2b505a8 100644
>--- a/lib/libc/include/libc_private.h
>+++ b/lib/libc/include/libc_private.h
>@@ -173,6 +173,60 @@ typedef pthread_func_t pthread_func_entry_t[2];
> 
> extern pthread_func_entry_t __thr_jtable[];
> 
>+extern int *(*__error_selector)(void);
>+int	_pthread_mutex_init_calloc_cb_stub(pthread_mutex_t *mutex,
>+	    void *(calloc_cb)(__size_t, __size_t));
>+
>+typedef int (*interpos_func_t)(void);
>+interpos_func_t *__libc_interposing_slot(int interposno);
>+extern interpos_func_t __libc_interposing[];
>+
>+enum {
>+	INTERPOS_accept,
>+	INTERPOS_accept4,
>+	INTERPOS_aio_suspend,
>+	INTERPOS_close,
>+	INTERPOS_connect,
>+	INTERPOS_creat,
>+	INTERPOS_fcntl,
>+	INTERPOS_fsync,
>+	INTERPOS_msync,
>+	INTERPOS_nanosleep,
>+	INTERPOS_open,
>+	INTERPOS_openat,
>+	INTERPOS_poll,
>+	INTERPOS_pselect,
>+	INTERPOS_raise,
>+	INTERPOS_recvfrom,
>+	INTERPOS_recvmsg,
>+	INTERPOS_select,
>+	INTERPOS_sendmsg,
>+	INTERPOS_sendto,
>+	INTERPOS_setcontext,
>+	INTERPOS_sigaction,
>+	INTERPOS_sigprocmask,
>+	INTERPOS_sigsuspend,
>+	INTERPOS_sigwait,
>+	INTERPOS_sigtimedwait,
>+	INTERPOS_sigwaitinfo,
>+	INTERPOS_swapcontext,
>+	INTERPOS_system,
>+	INTERPOS_sleep,
>+	INTERPOS_tcdrain,
>+	INTERPOS_usleep,
>+	INTERPOS_pause,
>+	INTERPOS_read,
>+	INTERPOS_readv,
>+	INTERPOS_wait,
>+	INTERPOS_wait3,
>+	INTERPOS_wait4,
>+	INTERPOS_waitpid,
>+	INTERPOS_write,
>+	INTERPOS_writev,
>+	INTERPOS__pthread_mutex_init_calloc_cb,
>+	INTERPOS_MAX
>+};
>+
> /*
>  * yplib internal interfaces
>  */
>@@ -215,42 +269,106 @@ void _malloc_thread_cleanup(void);
> void _malloc_prefork(void);
> void _malloc_postfork(void);
> 
>+void _malloc_first_thread(void);
>+
> /*
>  * Function to clean up streams, called from abort() and exit().
>  */
>-extern void (*__cleanup)(void) __hidden;
>+void (*__cleanup)(void) __hidden;
> 
> /*
>  * Get kern.osreldate to detect ABI revisions.  Explicitly
>  * ignores value of $OSVERSION and caches result.  Prototypes
>  * for the wrapped "new" pad-less syscalls are here for now.
>  */
>-extern int __getosreldate(void);
>+int __getosreldate(void);
> #include <sys/_types.h>
>-/* Without pad */
>-extern __off_t	__sys_lseek(int, __off_t, int);
>-extern int	__sys_ftruncate(int, __off_t);
>-extern int	__sys_truncate(const char *, __off_t);
>-extern __ssize_t __sys_pread(int, void *, __size_t, __off_t);
>-extern __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t);
>-extern void *	__sys_mmap(void *, __size_t, int, int, int, __off_t);
>+#include <sys/_sigset.h>
> 
> /* With pad */
>-extern __off_t	__sys_freebsd6_lseek(int, int, __off_t, int);
>-extern int	__sys_freebsd6_ftruncate(int, int, __off_t);
>-extern int	__sys_freebsd6_truncate(const char *, int, __off_t);
>-extern __ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t);
>-extern __ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t);
>-extern void *	__sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t);
>-
>-/* Without back-compat translation */
>-extern int	__sys_fcntl(int, int, ...);
>+__off_t	__sys_freebsd6_lseek(int, int, __off_t, int);
>+int	__sys_freebsd6_ftruncate(int, int, __off_t);
>+int	__sys_freebsd6_truncate(const char *, int, __off_t);
>+__ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t);
>+__ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t);
>+void *	__sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t);
> 
>+struct aiocb;
>+struct fd_set;
>+struct iovec;
>+struct msghdr;
>+struct pollfd;
>+struct rusage;
>+struct sigaction;
>+struct sockaddr;
> struct timespec;
> struct timeval;
> struct timezone;
>-int	__sys_gettimeofday(struct timeval *, struct timezone *);
>-int	__sys_clock_gettime(__clockid_t, struct timespec *ts);
>+struct __siginfo;
>+struct __ucontext;
>+int		__sys_aio_suspend(const struct aiocb * const[], int,
>+		    const struct timespec *);
>+int		__sys_accept(int, struct sockaddr *, __socklen_t *);
>+int		__sys_accept4(int, struct sockaddr *, __socklen_t *, int);
>+int		__sys_clock_gettime(__clockid_t, struct timespec *ts);
>+int		__sys_close(int);
>+int		__sys_connect(int, const struct sockaddr *, __socklen_t);
>+int		__sys_fcntl(int, int, ...);
>+int		__sys_fsync(int);
>+int		__sys_ftruncate(int, __off_t);
>+int		__sys_gettimeofday(struct timeval *, struct timezone *);
>+__off_t		__sys_lseek(int, __off_t, int);
>+void	       *__sys_mmap(void *, __size_t, int, int, int, __off_t);
>+int		__sys_msync(void *, __size_t, int);
>+int		__sys_nanosleep(const struct timespec *, struct timespec *);
>+int		__sys_open(const char *, int, ...);
>+int		__sys_openat(int, const char *, int, ...);
>+int		__sys_pselect(int, struct fd_set *, struct fd_set *,
>+		    struct fd_set *, const struct timespec *,
>+		    const __sigset_t *);
>+int		__sys_poll(struct pollfd *, unsigned, int);
>+__ssize_t	__sys_pread(int, void *, __size_t, __off_t);
>+__ssize_t	__sys_pwrite(int, const void *, __size_t, __off_t);
>+__ssize_t	__sys_read(int, void *, __size_t);
>+__ssize_t	__sys_readv(int, const struct iovec *, int);
>+__ssize_t	__sys_recv(int, void *, __size_t, int);
>+__ssize_t	__sys_recvfrom(int, void *, __size_t, int, struct sockaddr *,
>+		    __socklen_t *);
>+__ssize_t	__sys_recvmsg(int, struct msghdr *, int);
>+int		__sys_select(int, struct fd_set *, struct fd_set *,
>+		    struct fd_set *, struct timeval *);
>+__ssize_t	__sys_sendmsg(int, const struct msghdr *, int);
>+__ssize_t	__sys_sendto(int, const void *, __size_t, int,
>+		    const struct sockaddr *, __socklen_t);
>+int		__sys_setcontext(const struct __ucontext *);
>+int		__sys_sigaction(int, const struct sigaction *,
>+		    struct sigaction *);
>+int		__sys_sigprocmask(int, const __sigset_t *, __sigset_t *);
>+int		__sys_sigsuspend(const __sigset_t *);
>+int		__sys_sigtimedwait(const __sigset_t *, struct __siginfo *,
>+		    const struct timespec *);
>+int		__sys_sigwait(const __sigset_t *, int *);
>+int		__sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
>+int		__sys_swapcontext(struct __ucontext *,
>+		    const struct __ucontext *);
>+int		__sys_truncate(const char *, __off_t);
>+__pid_t		__sys_wait4(__pid_t, int *, int, struct rusage *);
>+__ssize_t	__sys_write(int, const void *, __size_t);
>+__ssize_t	__sys_writev(int, const struct iovec *, int);
>+
>+int		__libc_creat(const char *path, __mode_t mode);
>+int		__libc_pause(void);
>+int		__libc_raise(int);
>+int		__libc_sigwait(const __sigset_t * __restrict,
>+		    int * restrict sig);
>+int		__libc_system(const char *);
>+unsigned int	__libc_sleep(unsigned int);
>+int		__libc_tcdrain(int);
>+int		__libc_usleep(__useconds_t);
>+__pid_t		__libc_wait(int *);
>+__pid_t		__libc_wait3(int *, int, struct rusage *);
>+__pid_t		__libc_waitpid(__pid_t, int *, int);
>+int		__fcntl_compat(int fd, int cmd, ...);
> 
> /* execve() with PATH processing to implement posix_spawnp() */
> int _execvpe(const char *, char * const *, char * const *);
>diff --git a/lib/libc/stdlib/Symbol.map b/lib/libc/stdlib/Symbol.map
>index 8355f9a..39eab7d 100644
>--- a/lib/libc/stdlib/Symbol.map
>+++ b/lib/libc/stdlib/Symbol.map
>@@ -118,4 +118,5 @@ FBSD_1.4 {
> FBSDprivate_1.0 {
> 	__system;
> 	_system;
>+	__libc_system;
> };
>diff --git a/lib/libc/stdlib/jemalloc/Symbol.map b/lib/libc/stdlib/jemalloc/Symbol.map
>index 35a5dad..132664a 100644
>--- a/lib/libc/stdlib/jemalloc/Symbol.map
>+++ b/lib/libc/stdlib/jemalloc/Symbol.map
>@@ -55,4 +55,5 @@ FBSDprivate_1.0 {
> 	_malloc_thread_cleanup;
> 	_malloc_prefork;
> 	_malloc_postfork;
>+	_malloc_first_thread;
> };
>diff --git a/lib/libc/stdlib/system.c b/lib/libc/stdlib/system.c
>index e018e6f..bd9ea5a 100644
>--- a/lib/libc/stdlib/system.c
>+++ b/lib/libc/stdlib/system.c
>@@ -46,8 +46,17 @@ __FBSDID("$FreeBSD$");
> #include "un-namespace.h"
> #include "libc_private.h"
> 
>+#pragma weak system
> int
>-__system(const char *command)
>+system(const char *command)
>+{
>+
>+	return (((int (*)(const char *))
>+	    __libc_interposing[INTERPOS_system])(command));
>+}
>+
>+int
>+__libc_system(const char *command)
> {
> 	pid_t pid, savedpid;
> 	int pstat;
>@@ -95,5 +104,5 @@ __system(const char *command)
> 	return(pid == -1 ? -1 : pstat);
> }
> 
>-__weak_reference(__system, system);
>-__weak_reference(__system, _system);
>+__weak_reference(__libc_system, __system);
>+__weak_reference(__libc_system, _system);
>diff --git a/lib/libc/sys/Makefile.inc b/lib/libc/sys/Makefile.inc
>index c14b351..ffc5a39 100644
>--- a/lib/libc/sys/Makefile.inc
>+++ b/lib/libc/sys/Makefile.inc
>@@ -20,17 +20,60 @@ NOASM+=  clock_gettime.o gettimeofday.o
> PSEUDO+= _clock_gettime.o _gettimeofday.o
> 
> # Sources common to both syscall interfaces:
>-SRCS+=	stack_protector.c stack_protector_compat.c __error.c
>+SRCS+=	\
>+	stack_protector.c \
>+	stack_protector_compat.c \
>+	__error.c \
>+	interposing_table.c
>+
> .if ${MK_SYSCALL_COMPAT} != "no"
>-SYSCALL_COMPAT_SRCS=	fcntl.c ftruncate.c lseek.c mmap.c pread.c \
>-	pwrite.c truncate.c
>+SYSCALL_COMPAT_SRCS= \
>+	ftruncate.c \
>+	lseek.c \
>+	mmap.c \
>+	pread.c \
>+	pwrite.c \
>+	truncate.c
> SRCS+=	${SYSCALL_COMPAT_SRCS}
> NOASM+=	${SYSCALL_COMPAT_SRCS:S/.c/.o/}
>-PSEUDO+= _fcntl.o
> .endif
>-SRCS+= sigwait.c
>-NOASM+= sigwait.o
>-PSEUDO+= _sigwait.o
>+
>+INTERPOSED = \
>+	accept \
>+	accept4 \
>+	aio_suspend \
>+	close \
>+	connect \
>+	fcntl \
>+	fsync \
>+	msync \
>+	nanosleep \
>+	open \
>+	openat \
>+	poll \
>+	pselect \
>+	read \
>+	readv \
>+	recvfrom \
>+	recvmsg \
>+	select \
>+	sendmsg \
>+	sendto \
>+	setcontext \
>+	sigaction \
>+	sigprocmask \
>+	sigsuspend \
>+	sigtimedwait \
>+	sigwait \
>+	sigwaitinfo \
>+	swapcontext \
>+	wait4 \
>+	write \
>+	writev
>+
>+SRCS+=	${INTERPOSED:S/$/.c/}
>+NOASM+=	${INTERPOSED:S/$/.o/}
>+PSEUDO+=	${INTERPOSED:C/^.*$/_&.o/}
> 
> # Add machine dependent asm sources:
> SRCS+=${MDASM}
>diff --git a/lib/libc/sys/Symbol.map b/lib/libc/sys/Symbol.map
>index 448bcce..1c1254e 100644
>--- a/lib/libc/sys/Symbol.map
>+++ b/lib/libc/sys/Symbol.map
>@@ -1046,9 +1046,13 @@ FBSDprivate_1.0 {
> 	__sys_wait6;
> 	_write;
> 	__sys_write;
>+	__write_p;
> 	_writev;
> 	__sys_writev;
> 	__error_unthreaded;
>+	__error_selector;
> 	nlm_syscall;
> 	gssd_syscall;
>+	__libc_interposing_slot;
>+	__libc_sigwait;
> };
>diff --git a/lib/libc/sys/__error.c b/lib/libc/sys/__error.c
>index c3f59f8..329d124 100644
>--- a/lib/libc/sys/__error.c
>+++ b/lib/libc/sys/__error.c
>@@ -32,14 +32,17 @@ __FBSDID("$FreeBSD$");
> 
> extern int errno;
> 
>-/*
>- * Declare a weak reference in case the application is not linked
>- * with libpthread.
>- */
>-__weak_reference(__error_unthreaded, __error);
>-
> int *
> __error_unthreaded(void)
> {
> 	return(&errno);
> }
>+
>+int *(*__error_selector)(void) = __error_unthreaded;
>+
>+int *
>+__error(void)
>+{
>+
>+	return (__error_selector());
>+}
>diff --git a/lib/libc/sys/accept.c b/lib/libc/sys/accept.c
>new file mode 100644
>index 0000000..38e32f2
>--- /dev/null
>+++ b/lib/libc/sys/accept.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <sys/socket.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_accept, __accept);
>+
>+#pragma weak accept
>+int
>+accept(int s, struct sockaddr *addr, socklen_t *addrlen)
>+{
>+
>+	return (((int (*)(int, struct sockaddr *, socklen_t *))
>+	    __libc_interposing[INTERPOS_accept])(s, addr, addrlen));
>+}
>diff --git a/lib/libc/sys/accept4.c b/lib/libc/sys/accept4.c
>new file mode 100644
>index 0000000..2907b04
>--- /dev/null
>+++ b/lib/libc/sys/accept4.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <sys/socket.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_accept4, __accept4);
>+
>+#pragma weak accept4
>+int
>+accept4(int s, struct sockaddr *addr, socklen_t *addrlen, int flags)
>+{
>+
>+	return (((int (*)(int, struct sockaddr *, socklen_t *, int))
>+	    __libc_interposing[INTERPOS_accept4])(s, addr, addrlen, flags));
>+}
>diff --git a/lib/libc/sys/aio_suspend.c b/lib/libc/sys/aio_suspend.c
>new file mode 100644
>index 0000000..020edf8
>--- /dev/null
>+++ b/lib/libc/sys/aio_suspend.c
>@@ -0,0 +1,51 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/aio.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_aio_suspend, __aio_suspend);
>+
>+#pragma weak aio_suspend
>+int
>+aio_suspend(const struct aiocb * const iocbs[], int niocb,
>+    const struct timespec *timeout)
>+{
>+
>+	return (((int (*)(const struct aiocb * const[], int,
>+	    const struct timespec *))
>+	    __libc_interposing[INTERPOS_aio_suspend])(iocbs, niocb, timeout));
>+}
>diff --git a/lib/libc/sys/close.c b/lib/libc/sys/close.c
>new file mode 100644
>index 0000000..02e74c6
>--- /dev/null
>+++ b/lib/libc/sys/close.c
>@@ -0,0 +1,48 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/fcntl.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_close, __close);
>+
>+#pragma weak close
>+int
>+close(int fd)
>+{
>+
>+	return (((int (*)(int))__libc_interposing[INTERPOS_close])(fd));
>+}
>diff --git a/lib/libc/sys/connect.c b/lib/libc/sys/connect.c
>new file mode 100644
>index 0000000..7969142
>--- /dev/null
>+++ b/lib/libc/sys/connect.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <sys/socket.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_connect, __connect);
>+
>+#pragma weak connect
>+int
>+connect(int s, const struct sockaddr *addr, socklen_t addrlen)
>+{
>+
>+	return (((int (*)(int, const struct sockaddr *, socklen_t))
>+	    __libc_interposing[INTERPOS_connect])(s, addr, addrlen));
>+}
>diff --git a/lib/libc/sys/fcntl.c b/lib/libc/sys/fcntl.c
>index 480cc40..4cb887b 100644
>--- a/lib/libc/sys/fcntl.c
>+++ b/lib/libc/sys/fcntl.c
>@@ -34,7 +34,23 @@ __FBSDID("$FreeBSD$");
> #include <sys/syscall.h>
> #include "libc_private.h"
> 
>-__weak_reference(__fcntl_compat, fcntl);
>+#pragma weak fcntl
>+int
>+fcntl(int fd, int cmd, ...)
>+{
>+	va_list args;
>+	long arg;
>+
>+	va_start(args, cmd);
>+	arg = va_arg(args, long);
>+	va_end(args);
>+
>+	return (((int (*)(int, int, ...))
>+	    __libc_interposing[INTERPOS_fcntl])(fd, cmd, arg));
>+}
>+
>+#ifdef SYSCALL_COMPAT
>+__weak_reference(__fcntl_compat, __fcntl);
> 
> int
> __fcntl_compat(int fd, int cmd, ...)
>@@ -87,3 +103,7 @@ __fcntl_compat(int fd, int cmd, ...)
> 		return (__sys_fcntl(fd, cmd, arg));
> 	}
> }
>+#else
>+__weak_reference(__sys_fcntl, __fcntl_compat);
>+__weak_reference(__sys_fcntl, __fcntl);
>+#endif
>diff --git a/lib/libc/sys/fsync.c b/lib/libc/sys/fsync.c
>new file mode 100644
>index 0000000..3fff428
>--- /dev/null
>+++ b/lib/libc/sys/fsync.c
>@@ -0,0 +1,47 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/fcntl.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_fsync, __fsync);
>+
>+int
>+fsync(int fd)
>+{
>+
>+	return (((int (*)(int))__libc_interposing[INTERPOS_fsync])(fd));
>+}
>diff --git a/lib/libc/sys/interposing_table.c b/lib/libc/sys/interposing_table.c
>new file mode 100644
>index 0000000..c6d5c28
>--- /dev/null
>+++ b/lib/libc/sys/interposing_table.c
>@@ -0,0 +1,92 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include "libc_private.h"
>+
>+#define	SLOT(a, b) \
>+	[INTERPOS_##a] = (interpos_func_t)b
>+interpos_func_t __libc_interposing[INTERPOS_MAX] = {
>+	SLOT(accept, __sys_accept),
>+	SLOT(accept4, __sys_accept4),
>+	SLOT(aio_suspend, __sys_aio_suspend),
>+	SLOT(close, __sys_close),
>+	SLOT(connect, __sys_connect),
>+	SLOT(creat, __libc_creat),
>+	SLOT(fcntl, __fcntl_compat),
>+	SLOT(fsync, __sys_fsync),
>+	SLOT(msync, __sys_msync),
>+	SLOT(nanosleep, __sys_nanosleep),
>+	SLOT(open, __sys_open),
>+	SLOT(openat, __sys_openat),
>+	SLOT(poll, __sys_poll),
>+	SLOT(pselect, __sys_pselect),
>+	SLOT(raise, __libc_raise),
>+	SLOT(read, __sys_read),
>+	SLOT(readv, __sys_readv),
>+	SLOT(recvfrom, __sys_recvfrom),
>+	SLOT(recvmsg, __sys_recvmsg),
>+	SLOT(select, __sys_select),
>+	SLOT(sendmsg, __sys_sendmsg),
>+	SLOT(sendto, __sys_sendto),
>+	SLOT(setcontext, __sys_setcontext),
>+	SLOT(sigaction, __sys_sigaction),
>+	SLOT(sigprocmask, __sys_sigprocmask),
>+	SLOT(sigsuspend, __sys_sigsuspend),
>+	SLOT(sigwait, __libc_sigwait),
>+	SLOT(sigtimedwait, __sys_sigtimedwait),
>+	SLOT(sigwaitinfo, __sys_sigwaitinfo),
>+	SLOT(swapcontext, __sys_swapcontext),
>+	SLOT(system, __libc_system),
>+	SLOT(sleep, __libc_sleep),
>+	SLOT(tcdrain, __libc_tcdrain),
>+	SLOT(usleep, __libc_usleep),
>+	SLOT(pause, __libc_pause),
>+	SLOT(wait, __libc_wait),
>+	SLOT(wait3, __libc_wait3),
>+	SLOT(wait4, __sys_wait4),
>+	SLOT(waitpid, __libc_waitpid),
>+	SLOT(write, __sys_write),
>+	SLOT(writev, __sys_writev),
>+	SLOT(_pthread_mutex_init_calloc_cb, _pthread_mutex_init_calloc_cb_stub),
>+};
>+#undef SLOT
>+
>+interpos_func_t *
>+__libc_interposing_slot(int interposno)
>+{
>+
>+	return (&__libc_interposing[interposno]);
>+}
>diff --git a/lib/libc/sys/msync.c b/lib/libc/sys/msync.c
>new file mode 100644
>index 0000000..3c6879f
>--- /dev/null
>+++ b/lib/libc/sys/msync.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/fcntl.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_msync, __msync);
>+
>+#pragma weak msync
>+int
>+msync(void *addr, size_t len, int flags)
>+{
>+
>+	return (((int (*)(void *, size_t, int))
>+	    __libc_interposing[INTERPOS_msync])(addr, len, flags));
>+}
>diff --git a/lib/libc/sys/nanosleep.c b/lib/libc/sys/nanosleep.c
>new file mode 100644
>index 0000000..412b05e
>--- /dev/null
>+++ b/lib/libc/sys/nanosleep.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <time.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_nanosleep, __nanosleep);
>+
>+#pragma weak nanosleep
>+int
>+nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
>+{
>+
>+	return (((int (*)(const struct timespec *, struct timespec *))
>+	    __libc_interposing[INTERPOS_nanosleep])(rqtp, rmtp));
>+}
>diff --git a/lib/libc/sys/open.c b/lib/libc/sys/open.c
>new file mode 100644
>index 0000000..57c0324
>--- /dev/null
>+++ b/lib/libc/sys/open.c
>@@ -0,0 +1,59 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/fcntl.h>
>+#include <stdarg.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_open, __open);
>+
>+#pragma weak open
>+int
>+open(const char *path, int flags, ...)
>+{
>+	va_list ap;
>+	int mode;
>+
>+	if ((flags & O_CREAT) != 0) {
>+		va_start(ap, flags);
>+		mode = va_arg(ap, int);
>+		va_end(ap);
>+	} else {
>+		mode = 0;
>+	}
>+	return (((int (*)(const char *, int, ...))
>+	    __libc_interposing[INTERPOS_open])(path, flags, mode));
>+}
>diff --git a/lib/libc/sys/openat.c b/lib/libc/sys/openat.c
>new file mode 100644
>index 0000000..e72e7ed
>--- /dev/null
>+++ b/lib/libc/sys/openat.c
>@@ -0,0 +1,59 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/fcntl.h>
>+#include <stdarg.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_openat, __openat);
>+
>+#pragma weak openat
>+int
>+openat(int fd, const char *path, int flags, ...)
>+{
>+	va_list ap;
>+	int mode;
>+
>+	if ((flags & O_CREAT) != 0) {
>+		va_start(ap, flags);
>+		mode = va_arg(ap, int);
>+		va_end(ap);
>+	} else {
>+		mode = 0;
>+	}
>+	return (((int (*)(int, const char *, int, ...))
>+	    __libc_interposing[INTERPOS_openat])(fd, path, flags, mode));
>+}
>diff --git a/lib/libc/sys/poll.c b/lib/libc/sys/poll.c
>new file mode 100644
>index 0000000..43c17d2
>--- /dev/null
>+++ b/lib/libc/sys/poll.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/poll.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_poll, __poll);
>+
>+#pragma weak poll
>+int
>+poll(struct pollfd pfd[], nfds_t nfds, int timeout)
>+{
>+
>+	return (((int (*)(struct pollfd *, nfds_t, int))
>+	    __libc_interposing[INTERPOS_poll])(pfd, nfds, timeout));
>+}
>diff --git a/lib/libc/sys/pselect.c b/lib/libc/sys/pselect.c
>new file mode 100644
>index 0000000..a623a7d
>--- /dev/null
>+++ b/lib/libc/sys/pselect.c
>@@ -0,0 +1,51 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/select.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_pselect, __pselect);
>+
>+#pragma weak pselect
>+int
>+pselect(int n, fd_set *rs, fd_set *ws, fd_set *es, const struct timespec *t,
>+    const sigset_t *s)
>+{
>+
>+	return (((int (*)(int, fd_set *, fd_set *, fd_set *,
>+	    const struct timespec *, const sigset_t *))
>+	    __libc_interposing[INTERPOS_pselect])(n, rs, ws, es, t, s));
>+}
>diff --git a/lib/libc/sys/read.c b/lib/libc/sys/read.c
>new file mode 100644
>index 0000000..ab30189
>--- /dev/null
>+++ b/lib/libc/sys/read.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <unistd.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_read, __read);
>+
>+#pragma weak read
>+ssize_t
>+read(int fd, void *buf, size_t nbytes)
>+{
>+
>+	return (((ssize_t (*)(int, void *, size_t))
>+	    __libc_interposing[INTERPOS_read])(fd, buf, nbytes));
>+}
>diff --git a/lib/libc/sys/readv.c b/lib/libc/sys/readv.c
>new file mode 100644
>index 0000000..8c82040
>--- /dev/null
>+++ b/lib/libc/sys/readv.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <unistd.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_readv, __readv);
>+
>+#pragma weak readv
>+ssize_t
>+readv(int fd, const struct iovec *iov, int iovcnt)
>+{
>+
>+	return (((ssize_t (*)(int, const struct iovec *, int))
>+	    __libc_interposing[INTERPOS_readv])(fd, iov, iovcnt));
>+}
>diff --git a/lib/libc/sys/recvfrom.c b/lib/libc/sys/recvfrom.c
>new file mode 100644
>index 0000000..aa6ef3f
>--- /dev/null
>+++ b/lib/libc/sys/recvfrom.c
>@@ -0,0 +1,53 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <sys/socket.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_recvfrom, __recvfrom);
>+
>+#pragma weak recvfrom
>+ssize_t
>+recvfrom(int s, void *buf, size_t len, int flags,
>+    struct sockaddr * __restrict from, socklen_t * __restrict fromlen)
>+{
>+
>+	return (((ssize_t (*)(int, void *, size_t, int,
>+	    struct sockaddr *, socklen_t *))
>+	    __libc_interposing[INTERPOS_recvfrom])(s, buf, len, flags,
>+	   from, fromlen));
>+}
>diff --git a/lib/libc/sys/recvmsg.c b/lib/libc/sys/recvmsg.c
>new file mode 100644
>index 0000000..282ede9
>--- /dev/null
>+++ b/lib/libc/sys/recvmsg.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <sys/socket.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_recvmsg, __recvmsg);
>+
>+#pragma weak recvmsg
>+ssize_t
>+recvmsg(int s, struct msghdr *msg, int flags)
>+{
>+
>+	return (((int (*)(int, struct msghdr *, int))
>+	    __libc_interposing[INTERPOS_recvmsg])(s, msg, flags));
>+}
>diff --git a/lib/libc/sys/select.c b/lib/libc/sys/select.c
>new file mode 100644
>index 0000000..3990496
>--- /dev/null
>+++ b/lib/libc/sys/select.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/select.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_select, __select);
>+
>+#pragma weak select
>+int
>+select(int n, fd_set *rs, fd_set *ws, fd_set *es, struct timeval *t)
>+{
>+
>+	return (((int (*)(int, fd_set *, fd_set *, fd_set *, struct timeval *))
>+	    __libc_interposing[INTERPOS_select])(n, rs, ws, es, t));
>+}
>diff --git a/lib/libc/sys/sendmsg.c b/lib/libc/sys/sendmsg.c
>new file mode 100644
>index 0000000..7944643
>--- /dev/null
>+++ b/lib/libc/sys/sendmsg.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <sys/socket.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_sendmsg, __sendmsg);
>+
>+#pragma weak sendmsg
>+ssize_t
>+sendmsg(int s, const struct msghdr *msg, int flags)
>+{
>+
>+	return (((int (*)(int, const struct msghdr *, int))
>+	    __libc_interposing[INTERPOS_sendmsg])(s, msg, flags));
>+}
>diff --git a/lib/libc/sys/sendto.c b/lib/libc/sys/sendto.c
>new file mode 100644
>index 0000000..ecf98ee
>--- /dev/null
>+++ b/lib/libc/sys/sendto.c
>@@ -0,0 +1,53 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <sys/socket.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_sendto, __sendto);
>+
>+#pragma weak sendto
>+ssize_t
>+sendto(int s, const void *msg, size_t len, int flags,
>+    const struct sockaddr *to, socklen_t tolen)
>+{
>+
>+	return (((ssize_t (*)(int, const void *, size_t, int,
>+	    const struct sockaddr *, socklen_t))
>+	    __libc_interposing[INTERPOS_sendto])(s, msg, len, flags,
>+	    to, tolen));
>+}
>diff --git a/lib/libc/sys/setcontext.c b/lib/libc/sys/setcontext.c
>new file mode 100644
>index 0000000..a2e73b8
>--- /dev/null
>+++ b/lib/libc/sys/setcontext.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <ucontext.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_setcontext, __setcontext);
>+
>+#pragma weak setcontext
>+int
>+setcontext(const ucontext_t *uc)
>+{
>+
>+	return (((int (*)(const ucontext_t *))
>+	    __libc_interposing[INTERPOS_setcontext])(uc));
>+}
>diff --git a/lib/libc/sys/sigaction.c b/lib/libc/sys/sigaction.c
>new file mode 100644
>index 0000000..7645538
>--- /dev/null
>+++ b/lib/libc/sys/sigaction.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <signal.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_sigaction, __sigaction);
>+
>+#pragma weak sigaction
>+int
>+sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
>+{
>+
>+	return (((int (*)(int, const struct sigaction *, struct sigaction *))
>+	    __libc_interposing[INTERPOS_sigaction])(sig, act, oact));
>+}
>diff --git a/lib/libc/sys/sigprocmask.c b/lib/libc/sys/sigprocmask.c
>new file mode 100644
>index 0000000..40dba95
>--- /dev/null
>+++ b/lib/libc/sys/sigprocmask.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <signal.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_sigprocmask, __sigprocmask);
>+
>+#pragma weak sigprocmask
>+int
>+sigprocmask(int how, const sigset_t *set, sigset_t *oset)
>+{
>+
>+	return (((int (*)(int, const sigset_t *, sigset_t *))
>+	    __libc_interposing[INTERPOS_sigprocmask])(how, set, oset));
>+}
>diff --git a/lib/libc/sys/sigsuspend.c b/lib/libc/sys/sigsuspend.c
>new file mode 100644
>index 0000000..6e47368
>--- /dev/null
>+++ b/lib/libc/sys/sigsuspend.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <signal.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_sigsuspend, __sigsuspend);
>+
>+#pragma weak sigsuspend
>+int
>+sigsuspend(const sigset_t *set)
>+{
>+
>+	return (((int (*)(const sigset_t *))
>+	    __libc_interposing[INTERPOS_sigsuspend])(set));
>+}
>diff --git a/lib/libc/sys/sigtimedwait.c b/lib/libc/sys/sigtimedwait.c
>new file mode 100644
>index 0000000..4e06719
>--- /dev/null
>+++ b/lib/libc/sys/sigtimedwait.c
>@@ -0,0 +1,51 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <signal.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_sigtimedwait, __sigtimedwait);
>+
>+#pragma weak sigtimedwait
>+int
>+sigtimedwait(const sigset_t * __restrict set, siginfo_t * __restrict info,
>+    const struct timespec * __restrict t)
>+{
>+
>+	return (((int (*)(const sigset_t *, siginfo_t *,
>+	    const struct timespec *))
>+	    __libc_interposing[INTERPOS_sigtimedwait])(set, info, t));
>+}
>diff --git a/lib/libc/sys/sigwait.c b/lib/libc/sys/sigwait.c
>index 2fdffdd..b21cabd 100644
>--- a/lib/libc/sys/sigwait.c
>+++ b/lib/libc/sys/sigwait.c
>@@ -28,13 +28,21 @@ __FBSDID("$FreeBSD$");
> 
> #include <errno.h>
> #include <signal.h>
>+#include "libc_private.h"
> 
>-int __sys_sigwait(const sigset_t * restrict, int * restrict);
>+__weak_reference(__libc_sigwait, __sigwait);
> 
>-__weak_reference(__sigwait, sigwait);
>+#pragma weak sigwait
>+int
>+sigwait(const sigset_t *set, int *sig)
>+{
>+
>+	return (((int (*)(const sigset_t *, int *))
>+	    __libc_interposing[INTERPOS_sigwait])(set, sig));
>+}
> 
> int
>-__sigwait(const sigset_t * restrict set, int * restrict sig)
>+__libc_sigwait(const sigset_t *set, int *sig)
> {
> 	int ret;
> 
>diff --git a/lib/libc/sys/sigwaitinfo.c b/lib/libc/sys/sigwaitinfo.c
>new file mode 100644
>index 0000000..b9cdc79
>--- /dev/null
>+++ b/lib/libc/sys/sigwaitinfo.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <signal.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_sigwaitinfo, __sigwaitinfo);
>+
>+#pragma weak sigwaitinfo
>+int
>+sigwaitinfo(const sigset_t * __restrict set, siginfo_t * __restrict info)
>+{
>+
>+	return (((int (*)(const sigset_t *, siginfo_t *))
>+	    __libc_interposing[INTERPOS_sigwaitinfo])(set, info));
>+}
>diff --git a/lib/libc/sys/swapcontext.c b/lib/libc/sys/swapcontext.c
>new file mode 100644
>index 0000000..e4d5a49
>--- /dev/null
>+++ b/lib/libc/sys/swapcontext.c
>@@ -0,0 +1,46 @@
>+/*
>+ * Copyright (c) 2001 Daniel M. Eischen <deischen@freebsd.org>
>+ * All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Neither the name of the author nor the names of its contributors
>+ *    may be used to endorse or promote products derived from this software
>+ *    without specific prior written permission.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
>+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>+ * SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/param.h>
>+#include <sys/signal.h>
>+#include <sys/ucontext.h>
>+#include <errno.h>
>+#include <stddef.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_swapcontext, __swapcontext);
>+
>+#pragma weak swapcontext
>+int
>+swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
>+{
>+
>+	return (((int (*)(ucontext_t *, const ucontext_t *))
>+	    __libc_interposing[INTERPOS_swapcontext])(oucp, ucp));
>+}
>diff --git a/lib/libc/sys/wait4.c b/lib/libc/sys/wait4.c
>new file mode 100644
>index 0000000..a5dbd0f
>--- /dev/null
>+++ b/lib/libc/sys/wait4.c
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/wait.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_wait4, __wait4);
>+
>+#pragma weak wait4
>+pid_t
>+wait4(pid_t pid, int *status, int options, struct rusage *ru)
>+{
>+
>+	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
>+	    __libc_interposing[INTERPOS_wait4])(pid, status, options, ru));
>+}
>diff --git a/lib/libc/sys/write.c b/lib/libc/sys/write.c
>new file mode 100644
>index 0000000..ffb1aa5
>--- /dev/null
>+++ b/lib/libc/sys/write.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <unistd.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_write, __write);
>+
>+#pragma weak write
>+ssize_t
>+write(int fd, const void *buf, size_t nbytes)
>+{
>+
>+	return (((ssize_t (*)(int, const void *, size_t))
>+	    __libc_interposing[INTERPOS_write])(fd, buf, nbytes));
>+}
>diff --git a/lib/libc/sys/writev.c b/lib/libc/sys/writev.c
>new file mode 100644
>index 0000000..6be74b3
>--- /dev/null
>+++ b/lib/libc/sys/writev.c
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>+ * All rights reserved.
>+ *
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer as
>+ *    the first lines of this file unmodified other than the possible
>+ *    addition of one or more copyright notices.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice(s), this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
>+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
>+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
>+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
>+#include <sys/types.h>
>+#include <sys/syscall.h>
>+#include <unistd.h>
>+#include "libc_private.h"
>+
>+__weak_reference(__sys_writev, __writev);
>+
>+#pragma weak writev
>+ssize_t
>+writev(int fd, const struct iovec *iov, int iovcnt)
>+{
>+
>+	return (((ssize_t (*)(int, const struct iovec *, int))
>+	    __libc_interposing[INTERPOS_writev])(fd, iov, iovcnt));
>+}
>diff --git a/lib/libthr/Makefile b/lib/libthr/Makefile
>index 5cbd0aa..08d5052 100644
>--- a/lib/libthr/Makefile
>+++ b/lib/libthr/Makefile
>@@ -40,7 +40,6 @@ MAN=	libthr.3
> 
> # enable extra internal consistancy checks
> CFLAGS+=-D_PTHREADS_INVARIANTS
>-#CFLAGS+=-g
> 
> PRECIOUSLIB=
> 
>diff --git a/lib/libthr/pthread.map b/lib/libthr/pthread.map
>index bbbd930..0903989 100644
>--- a/lib/libthr/pthread.map
>+++ b/lib/libthr/pthread.map
>@@ -6,22 +6,6 @@
>  * Use the same naming scheme as libc.
>  */
> FBSD_1.0 {
>-	__error;
>-	accept;
>-	aio_suspend;
>-	close;
>-	connect;
>-	creat;
>-	execve;
>-	fcntl;
>-	fork;
>-	fsync;
>-	msync;
>-	nanosleep;
>-	open;
>-	pause;
>-	poll;
>-	pselect;
> 	pthread_atfork;
> 	pthread_barrier_destroy;
> 	pthread_barrier_init;
>@@ -139,30 +123,6 @@ FBSD_1.0 {
> 	pthread_testcancel;
> 	pthread_timedjoin_np;
> 	pthread_yield;
>-	raise;
>-	read;
>-	readv;
>-	recvfrom;
>-	recvmsg;
>-	select;
>-	sendmsg;
>-	sendto;
>-	sigaction;
>-	sigprocmask;
>-	sigsuspend;
>-	sigwait;
>-	sigwaitinfo;
>-	sigtimedwait;
>-	sleep;
>-	system;
>-	tcdrain;
>-	usleep;
>-	wait;
>-	wait3;
>-	wait4;
>-	waitpid;
>-	write;
>-	writev;
> };
> 
> /*
>@@ -170,28 +130,6 @@ FBSD_1.0 {
>  * These are not part of our application ABI.
>  */
> FBSDprivate_1.0 {
>-	___creat;
>-	___pause;
>-	___pselect;
>-	___sigwait;
>-	___sleep;
>-	___system;
>-	___tcdrain;
>-	___usleep;
>-	___wait;
>-	___waitpid;
>-	__accept;
>-	__accept4;
>-	__aio_suspend;
>-	__close;
>-	__connect;
>-	__fcntl;
>-	__fsync;
>-	__msync;
>-	__nanosleep;
>-	__open;
>-	__openat;
>-	__poll;
> 	__pthread_cond_timedwait;
> 	__pthread_cond_wait;
> 	__pthread_cxa_finalize;
>@@ -199,21 +137,6 @@ FBSDprivate_1.0 {
> 	__pthread_mutex_lock;
> 	__pthread_mutex_timedlock;
> 	__pthread_mutex_trylock;
>-	__read;
>-	__readv;
>-	__recvfrom;
>-	__recvmsg;
>-	__select;
>-	__sendmsg;
>-	__sendto;
>-	__sigsuspend;
>-	__sigtimedwait;
>-	__sigwaitinfo;
>-	__wait3;
>-	__wait4;
>-	__write;
>-	__writev;
>-	_fork;
> 	_pthread_atfork;
> 	_pthread_barrier_destroy;
> 	_pthread_barrier_init;
>@@ -345,18 +268,6 @@ FBSDprivate_1.0 {
> 	_pthread_testcancel;
> 	_pthread_timedjoin_np;
> 	_pthread_yield;
>-	_raise;
>-	_setcontext;
>-	_sigaction;
>-	_sigprocmask;
>-	_sigsuspend;
>-	_sigtimedwait;
>-	_sigwait;
>-	_sigwaitinfo;
>-	_spinlock;
>-	_spinlock_debug;
>-	_spinunlock;
>-	_swapcontext;
> 
> 	/* Debugger needs these. */
> 	_libthr_debug;
>@@ -404,12 +315,5 @@ FBSD_1.1 {
> };
> 
> FBSD_1.2 {
>-	openat;
> 	pthread_getthreadid_np;
>-	setcontext;
>-	swapcontext;
>-};
>-
>-FBSD_1.3 {
>-	accept4;
> };
>diff --git a/lib/libthr/sys/thr_error.c b/lib/libthr/sys/thr_error.c
>index 45295c5..852588a 100644
>--- a/lib/libthr/sys/thr_error.c
>+++ b/lib/libthr/sys/thr_error.c
>@@ -42,8 +42,9 @@
> #undef errno
> extern	int	errno;
> 
>+__weak_reference(__error_threaded, __error);
> int *
>-__error(void)
>+__error_threaded(void)
> {
> 	struct pthread *curthread;
> 
>diff --git a/lib/libthr/thread/thr_create.c b/lib/libthr/thread/thr_create.c
>index a41b33f..df3509d 100644
>--- a/lib/libthr/thread/thr_create.c
>+++ b/lib/libthr/thread/thr_create.c
>@@ -40,6 +40,7 @@
> #include <pthread_np.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
> #include "thr_private.h"
> 
> static int  create_stack(struct pthread_attr *pattr);
>@@ -66,8 +67,11 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
> 	/*
> 	 * Tell libc and others now they need lock to protect their data.
> 	 */
>-	if (_thr_isthreaded() == 0 && _thr_setthreaded(1))
>-		return (EAGAIN);
>+	if (_thr_isthreaded() == 0) {
>+		_malloc_first_thread();
>+		if (_thr_setthreaded(1))
>+			return (EAGAIN);
>+	}
> 
> 	curthread = _get_curthread();
> 	if ((new_thread = _thr_alloc(curthread)) == NULL)
>diff --git a/lib/libthr/thread/thr_init.c b/lib/libthr/thread/thr_init.c
>index 6d6a532..9a1a67a 100644
>--- a/lib/libthr/thread/thr_init.c
>+++ b/lib/libthr/thread/thr_init.c
>@@ -37,6 +37,7 @@
> #include <sys/types.h>
> #include <sys/signalvar.h>
> #include <sys/ioctl.h>
>+#include <sys/link_elf.h>
> #include <sys/resource.h>
> #include <sys/sysctl.h>
> #include <sys/ttycom.h>
>@@ -302,7 +303,7 @@ _thread_init_hack(void)
> void
> _libpthread_init(struct pthread *curthread)
> {
>-	int fd, first = 0;
>+	int fd, first, dlopened;
> 
> 	/* Check if this function has already been called: */
> 	if ((_thr_initial != NULL) && (curthread == NULL))
>@@ -316,6 +317,7 @@ _libpthread_init(struct pthread *curthread)
> 	if (sizeof(jmp_table) != (sizeof(pthread_func_t) * PJT_MAX * 2))
> 		PANIC("Thread jump table not properly initialized");
> 	memcpy(__thr_jtable, jmp_table, sizeof(jmp_table));
>+	__thr_interpose_libc();
> 
> 	/*
> 	 * Check for the special case of this process running as
>@@ -349,7 +351,10 @@ _libpthread_init(struct pthread *curthread)
> 		if (curthread == NULL)
> 			PANIC("Can't allocate initial thread");
> 		init_main_thread(curthread);
>+	} else {
>+		first = 0;
> 	}
>+		
> 	/*
> 	 * Add the thread to the thread list queue.
> 	 */
>@@ -361,7 +366,8 @@ _libpthread_init(struct pthread *curthread)
> 
> 	if (first) {
> 		_thr_initial = curthread;
>-		_thr_signal_init();
>+		dlopened = _rtld_is_dlopened(&_thread_autoinit_dummy_decl) != 0;
>+		_thr_signal_init(dlopened);
> 		if (_thread_event_mask & TD_CREATE)
> 			_thr_report_creation(curthread, curthread);
> 		/*
>diff --git a/lib/libthr/thread/thr_printf.c b/lib/libthr/thread/thr_printf.c
>index 7d32ae7..a64b446 100644
>--- a/lib/libthr/thread/thr_printf.c
>+++ b/lib/libthr/thread/thr_printf.c
>@@ -31,6 +31,7 @@
> #include <unistd.h>
> #include <pthread.h>
> 
>+#include "libc_private.h"
> #include "thr_private.h"
> 
> static void	pchar(int fd, char c);
>diff --git a/lib/libthr/thread/thr_private.h b/lib/libthr/thread/thr_private.h
>index c6651cd..cebf7c6 100644
>--- a/lib/libthr/thread/thr_private.h
>+++ b/lib/libthr/thread/thr_private.h
>@@ -763,7 +763,7 @@ void	_thr_cancel_leave(struct pthread *, int) __hidden;
> void	_thr_testcancel(struct pthread *) __hidden;
> void	_thr_signal_block(struct pthread *) __hidden;
> void	_thr_signal_unblock(struct pthread *) __hidden;
>-void	_thr_signal_init(void) __hidden;
>+void	_thr_signal_init(int) __hidden;
> void	_thr_signal_deinit(void) __hidden;
> int	_thr_send_sig(struct pthread *, int sig) __hidden;
> void	_thr_list_init(void) __hidden;
>@@ -839,7 +839,6 @@ int     __sys_close(int);
> int	__sys_fork(void);
> pid_t	__sys_getpid(void);
> ssize_t __sys_read(int, void *, size_t);
>-ssize_t __sys_write(int, const void *, size_t);
> void	__sys_exit(int);
> #endif
> 
>@@ -906,12 +905,30 @@ int	_sleepq_remove(struct sleepqueue *, struct pthread *) __hidden;
> void	_sleepq_drop(struct sleepqueue *,
> 		void (*cb)(struct pthread *, void *arg), void *) __hidden;
> 
>+int	_pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
>+	    void *(calloc_cb)(size_t, size_t));
>+
> struct dl_phdr_info;
> void __pthread_cxa_finalize(struct dl_phdr_info *phdr_info);
> void _thr_tsd_unload(struct dl_phdr_info *phdr_info) __hidden;
> void _thr_sigact_unload(struct dl_phdr_info *phdr_info) __hidden;
> void _thr_stack_fix_protection(struct pthread *thrd);
> 
>+int *__error_threaded(void);
>+void __thr_interpose_libc(void) __hidden;
>+int __thr_pause(void) __hidden;
>+int __thr_raise(int sig);
>+int __thr_setcontext(const ucontext_t *ucp);
>+int __thr_sigaction(int sig, const struct sigaction *act,
>+    struct sigaction *oact) __hidden;
>+int __thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset);
>+int __thr_sigsuspend(const sigset_t * set);
>+int __thr_sigtimedwait(const sigset_t *set, siginfo_t *info,
>+    const struct timespec * timeout);
>+int __thr_sigwait(const sigset_t *set, int *sig);
>+int __thr_sigwaitinfo(const sigset_t *set, siginfo_t *info);
>+int __thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp);
>+
> __END_DECLS
> 
> #endif  /* !_THR_PRIVATE_H */
>diff --git a/lib/libthr/thread/thr_sig.c b/lib/libthr/thread/thr_sig.c
>index 57c9406..1ec64f0 100644
>--- a/lib/libthr/thread/thr_sig.c
>+++ b/lib/libthr/thread/thr_sig.c
>@@ -38,6 +38,7 @@
> #include "un-namespace.h"
> #include "libc_private.h"
> 
>+#include "libc_private.h"
> #include "thr_private.h"
> 
> /* #define DEBUG_SIGNAL */
>@@ -54,24 +55,23 @@ struct usigaction {
> 
> static struct usigaction _thr_sigact[_SIG_MAXSIG];
> 
>+static inline struct usigaction *
>+__libc_sigaction_slot(int signo)
>+{
>+
>+	return (&_thr_sigact[signo - 1]);
>+}
>+
> static void thr_sighandler(int, siginfo_t *, void *);
> static void handle_signal(struct sigaction *, int, siginfo_t *, ucontext_t *);
> static void check_deferred_signal(struct pthread *);
> static void check_suspend(struct pthread *);
> static void check_cancel(struct pthread *curthread, ucontext_t *ucp);
> 
>-int	___pause(void);
>-int	_raise(int);
>-int	__sigtimedwait(const sigset_t *set, siginfo_t *info,
>-	const struct timespec * timeout);
> int	_sigtimedwait(const sigset_t *set, siginfo_t *info,
> 	const struct timespec * timeout);
>-int	__sigwaitinfo(const sigset_t *set, siginfo_t *info);
> int	_sigwaitinfo(const sigset_t *set, siginfo_t *info);
>-int	___sigwait(const sigset_t *set, int *sig);
> int	_sigwait(const sigset_t *set, int *sig);
>-int	__sigsuspend(const sigset_t *sigmask);
>-int	_sigaction(int, const struct sigaction *, struct sigaction *);
> int	_setcontext(const ucontext_t *);
> int	_swapcontext(ucontext_t *, const ucontext_t *);
> 
>@@ -143,8 +143,8 @@ sigcancel_handler(int sig __unused,
> 	errno = err;
> }
> 
>-typedef void (*ohandler)(int sig, int code,
>-	struct sigcontext *scp, char *addr, __sighandler_t *catcher);
>+typedef void (*ohandler)(int sig, int code, struct sigcontext *scp,
>+    char *addr, __sighandler_t *catcher);
> 
> /*
>  * The signal handler wrapper is entered with all signal masked.
>@@ -152,15 +152,19 @@ typedef void (*ohandler)(int sig, int code,
> static void
> thr_sighandler(int sig, siginfo_t *info, void *_ucp)
> {
>-	struct pthread *curthread = _get_curthread();
>-	ucontext_t *ucp = _ucp;
>+	struct pthread *curthread;
>+	ucontext_t *ucp;
> 	struct sigaction act;
>+	struct usigaction *usa;
> 	int err;
> 
> 	err = errno;
>-	_thr_rwl_rdlock(&_thr_sigact[sig-1].lock);
>-	act = _thr_sigact[sig-1].sigact;
>-	_thr_rwl_unlock(&_thr_sigact[sig-1].lock);
>+	curthread = _get_curthread();
>+	ucp = _ucp;
>+	usa = __libc_sigaction_slot(sig);
>+	_thr_rwl_rdlock(&usa->lock);
>+	act = usa->sigact;
>+	_thr_rwl_unlock(&usa->lock);
> 	errno = err;
> 	curthread->deferred_run = 0;
> 
>@@ -234,12 +238,12 @@ handle_signal(struct sigaction *actp, int sig, siginfo_t *info, ucontext_t *ucp)
> 	 * so after setjmps() returns once more, the user code may need to
> 	 * re-set cancel_enable flag by calling pthread_setcancelstate().
> 	 */
>-	if ((actp->sa_flags & SA_SIGINFO) != 0)
>-		(*(sigfunc))(sig, info, ucp);
>-	else {
>-		((ohandler)(*sigfunc))(
>-			sig, info->si_code, (struct sigcontext *)ucp,
>-			info->si_addr, (__sighandler_t *)sigfunc);
>+	if ((actp->sa_flags & SA_SIGINFO) != 0) {
>+		sigfunc(sig, info, ucp);
>+	} else {
>+		((ohandler)sigfunc)(sig, info->si_code,
>+		    (struct sigcontext *)ucp, info->si_addr,
>+		    (__sighandler_t *)sigfunc);
> 	}
> 	err = errno;
> 
>@@ -395,9 +399,34 @@ check_suspend(struct pthread *curthread)
> }
> 
> void
>-_thr_signal_init(void)
>+_thr_signal_init(int dlopened)
> {
>-	struct sigaction act;
>+	struct sigaction act, nact, oact;
>+	struct usigaction *usa;
>+	sigset_t oldset;
>+	int sig, error;
>+
>+	if (dlopened) {
>+		__sys_sigprocmask(SIG_SETMASK, &_thr_maskset, &oldset);
>+		for (sig = 1; sig <= _SIG_MAXSIG; sig++) {
>+			if (sig == SIGCANCEL)
>+				continue;
>+			error = __sys_sigaction(sig, NULL, &oact);
>+			if (error == -1 || oact.sa_handler == SIG_DFL ||
>+			    oact.sa_handler == SIG_IGN)
>+				continue;
>+			usa = __libc_sigaction_slot(sig);
>+			usa->sigact = oact;
>+			nact = oact;
>+			remove_thr_signals(&usa->sigact.sa_mask);
>+			nact.sa_flags &= ~SA_NODEFER;
>+			nact.sa_flags |= SA_SIGINFO;
>+			nact.sa_sigaction = thr_sighandler;
>+			nact.sa_mask = _thr_maskset;
>+			(void)__sys_sigaction(sig, &nact, NULL);
>+		}
>+		__sys_sigprocmask(SIG_SETMASK, &oldset, NULL);
>+	}
> 
> 	/* Install SIGCANCEL handler. */
> 	SIGFILLSET(act.sa_mask);
>@@ -418,18 +447,20 @@ _thr_sigact_unload(struct dl_phdr_info *phdr_info)
> 	struct pthread *curthread = _get_curthread();
> 	struct urwlock *rwlp;
> 	struct sigaction *actp;
>+	struct usigaction *usa;
> 	struct sigaction kact;
> 	void (*handler)(int);
> 	int sig;
>  
> 	_thr_signal_block(curthread);
> 	for (sig = 1; sig <= _SIG_MAXSIG; sig++) {
>-		actp = &_thr_sigact[sig-1].sigact;
>+		usa = __libc_sigaction_slot(sig);
>+		actp = &usa->sigact;
> retry:
> 		handler = actp->sa_handler;
> 		if (handler != SIG_DFL && handler != SIG_IGN &&
> 		    __elf_phdr_match_addr(phdr_info, handler)) {
>-			rwlp = &_thr_sigact[sig-1].lock;
>+			rwlp = &usa->lock;
> 			_thr_rwl_wrlock(rwlp);
> 			if (handler != actp->sa_handler) {
> 				_thr_rwl_unlock(rwlp);
>@@ -455,7 +486,7 @@ _thr_signal_prefork(void)
> 	int i;
> 
> 	for (i = 1; i <= _SIG_MAXSIG; ++i)
>-		_thr_rwl_rdlock(&_thr_sigact[i-1].lock);
>+		_thr_rwl_rdlock(&__libc_sigaction_slot(i)->lock);
> }
> 
> void
>@@ -464,7 +495,7 @@ _thr_signal_postfork(void)
> 	int i;
> 
> 	for (i = 1; i <= _SIG_MAXSIG; ++i)
>-		_thr_rwl_unlock(&_thr_sigact[i-1].lock);
>+		_thr_rwl_unlock(&__libc_sigaction_slot(i)->lock);
> }
> 
> void
>@@ -472,8 +503,10 @@ _thr_signal_postfork_child(void)
> {
> 	int i;
> 
>-	for (i = 1; i <= _SIG_MAXSIG; ++i)
>-		bzero(&_thr_sigact[i-1].lock, sizeof(struct urwlock));
>+	for (i = 1; i <= _SIG_MAXSIG; ++i) {
>+		bzero(&__libc_sigaction_slot(i) -> lock,
>+		    sizeof(struct urwlock));
>+	}
> }
> 
> void
>@@ -481,84 +514,81 @@ _thr_signal_deinit(void)
> {
> }
> 
>-__weak_reference(___pause, pause);
>-
> int
>-___pause(void)
>+__thr_pause(void)
> {
> 	sigset_t oset;
> 
> 	if (_sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
> 		return (-1);
>-	return (__sigsuspend(&oset));
>+	return (__thr_sigsuspend(&oset));
> }
> 
>-__weak_reference(_raise, raise);
>-
> int
>-_raise(int sig)
>+__thr_raise(int sig)
> {
>-	return _thr_send_sig(_get_curthread(), sig);
>-}
> 
>-__weak_reference(_sigaction, sigaction);
>+	return (_thr_send_sig(_get_curthread(), sig));
>+}
> 
> int
>-_sigaction(int sig, const struct sigaction * act, struct sigaction * oact)
>+__thr_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
> {
> 	struct sigaction newact, oldact, oldact2;
> 	sigset_t oldset;
>-	int ret = 0, err = 0;
>+	struct usigaction *usa;
>+	int ret, err;
> 
> 	if (!_SIG_VALID(sig) || sig == SIGCANCEL) {
> 		errno = EINVAL;
> 		return (-1);
> 	}
> 
>-	if (act)
>-		newact = *act;
>+	ret = 0;
>+	err = 0;
>+	usa = __libc_sigaction_slot(sig);
> 
> 	__sys_sigprocmask(SIG_SETMASK, &_thr_maskset, &oldset);
>-	_thr_rwl_wrlock(&_thr_sigact[sig-1].lock);
>+	_thr_rwl_wrlock(&usa->lock);
>  
> 	if (act != NULL) {
>-		oldact2 = _thr_sigact[sig-1].sigact;
>+		oldact2 = usa->sigact;
>+		newact = *act;
> 
>  		/*
> 		 * if a new sig handler is SIG_DFL or SIG_IGN,
>-		 * don't remove old handler from _thr_sigact[],
>+		 * don't remove old handler from __libc_sigact[],
> 		 * so deferred signals still can use the handlers,
> 		 * multiple threads invoking sigaction itself is
> 		 * a race condition, so it is not a problem.
> 		 */
> 		if (newact.sa_handler != SIG_DFL &&
> 		    newact.sa_handler != SIG_IGN) {
>-			_thr_sigact[sig-1].sigact = newact;
>-			remove_thr_signals(
>-				&_thr_sigact[sig-1].sigact.sa_mask);
>+			usa->sigact = newact;
>+			remove_thr_signals(&usa->sigact.sa_mask);
> 			newact.sa_flags &= ~SA_NODEFER;
> 			newact.sa_flags |= SA_SIGINFO;
> 			newact.sa_sigaction = thr_sighandler;
> 			newact.sa_mask = _thr_maskset; /* mask all signals */
> 		}
>-		if ((ret = __sys_sigaction(sig, &newact, &oldact))) {
>+		ret = __sys_sigaction(sig, &newact, &oldact);
>+		if (ret == -1) {
> 			err = errno;
>-			_thr_sigact[sig-1].sigact = oldact2;
>+			usa->sigact = oldact2;
> 		}
> 	} else if (oact != NULL) {
> 		ret = __sys_sigaction(sig, NULL, &oldact);
> 		err = errno;
> 	}
> 
>-	if (oldact.sa_handler != SIG_DFL &&
>-	    oldact.sa_handler != SIG_IGN) {
>+	if (oldact.sa_handler != SIG_DFL && oldact.sa_handler != SIG_IGN) {
> 		if (act != NULL)
> 			oldact = oldact2;
> 		else if (oact != NULL)
>-			oldact = _thr_sigact[sig-1].sigact;
>+			oldact = usa->sigact;
> 	}
> 
>-	_thr_rwl_unlock(&_thr_sigact[sig-1].lock);
>+	_thr_rwl_unlock(&usa->lock);
> 	__sys_sigprocmask(SIG_SETMASK, &oldset, NULL);
> 
> 	if (ret == 0) {
>@@ -570,10 +600,8 @@ _sigaction(int sig, const struct sigaction * act, struct sigaction * oact)
> 	return (ret);
> }
> 
>-__weak_reference(_sigprocmask, sigprocmask);
>-
> int
>-_sigprocmask(int how, const sigset_t *set, sigset_t *oset)
>+__thr_sigprocmask(int how, const sigset_t *set, sigset_t *oset)
> {
> 	const sigset_t *p = set;
> 	sigset_t newset;
>@@ -598,8 +626,6 @@ _pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
> 	return (0);
> }
> 
>-__weak_reference(__sigsuspend, sigsuspend);
>-
> int
> _sigsuspend(const sigset_t * set)
> {
>@@ -609,7 +635,7 @@ _sigsuspend(const sigset_t * set)
> }
> 
> int
>-__sigsuspend(const sigset_t * set)
>+__thr_sigsuspend(const sigset_t * set)
> {
> 	struct pthread *curthread;
> 	sigset_t newset;
>@@ -633,10 +659,6 @@ __sigsuspend(const sigset_t * set)
> 	return (ret);
> }
> 
>-__weak_reference(___sigwait, sigwait);
>-__weak_reference(__sigtimedwait, sigtimedwait);
>-__weak_reference(__sigwaitinfo, sigwaitinfo);
>-
> int
> _sigtimedwait(const sigset_t *set, siginfo_t *info,
> 	const struct timespec * timeout)
>@@ -653,8 +675,8 @@ _sigtimedwait(const sigset_t *set, siginfo_t *info,
>  *   it is not canceled.
>  */
> int
>-__sigtimedwait(const sigset_t *set, siginfo_t *info,
>-	const struct timespec * timeout)
>+__thr_sigtimedwait(const sigset_t *set, siginfo_t *info,
>+    const struct timespec * timeout)
> {
> 	struct pthread	*curthread = _get_curthread();
> 	sigset_t newset;
>@@ -681,7 +703,7 @@ _sigwaitinfo(const sigset_t *set, siginfo_t *info)
>  *   it is not canceled.
>  */ 
> int
>-__sigwaitinfo(const sigset_t *set, siginfo_t *info)
>+__thr_sigwaitinfo(const sigset_t *set, siginfo_t *info)
> {
> 	struct pthread	*curthread = _get_curthread();
> 	sigset_t newset;
>@@ -707,7 +729,7 @@ _sigwait(const sigset_t *set, int *sig)
>  *   it is not canceled.
>  */ 
> int
>-___sigwait(const sigset_t *set, int *sig)
>+__thr_sigwait(const sigset_t *set, int *sig)
> {
> 	struct pthread	*curthread = _get_curthread();
> 	sigset_t newset;
>@@ -721,9 +743,8 @@ ___sigwait(const sigset_t *set, int *sig)
> 	return (ret);
> }
> 
>-__weak_reference(_setcontext, setcontext);
> int
>-_setcontext(const ucontext_t *ucp)
>+__thr_setcontext(const ucontext_t *ucp)
> {
> 	ucontext_t uc;
> 
>@@ -735,12 +756,11 @@ _setcontext(const ucontext_t *ucp)
> 		return __sys_setcontext(ucp);
> 	(void) memcpy(&uc, ucp, sizeof(uc));
> 	SIGDELSET(uc.uc_sigmask, SIGCANCEL);
>-	return __sys_setcontext(&uc);
>+	return (__sys_setcontext(&uc));
> }
> 
>-__weak_reference(_swapcontext, swapcontext);
> int
>-_swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
>+__thr_swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
> {
> 	ucontext_t uc;
> 
>@@ -753,5 +773,5 @@ _swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
> 		SIGDELSET(uc.uc_sigmask, SIGCANCEL);
> 		ucp = &uc;
> 	}
>-	return __sys_swapcontext(oucp, ucp);
>+	return (__sys_swapcontext(oucp, ucp));
> }
>diff --git a/lib/libthr/thread/thr_syscalls.c b/lib/libthr/thread/thr_syscalls.c
>index 7a08302..325a3e5 100644
>--- a/lib/libthr/thread/thr_syscalls.c
>+++ b/lib/libthr/thread/thr_syscalls.c
>@@ -1,9 +1,13 @@
> /*
>+ * Copyright (c) 2014 The FreeBSD Foundation.
>  * Copyright (C) 2005 David Xu <davidxu@freebsd.org>.
>  * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>.
>  * Copyright (C) 2000 Jason Evans <jasone@freebsd.org>.
>  * All rights reserved.
>  * 
>+ * Portions of this software were developed by Konstantin Belousov
>+ * under sponsorship from the FreeBSD Foundation.
>+ *
>  * Redistribution and use in source and binary forms, with or without
>  * modification, are permitted provided that the following conditions
>  * are met:
>@@ -27,8 +31,6 @@
>  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
>  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
>  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>- *
>- * $FreeBSD$
>  */
> 
> /*
>@@ -61,6 +63,9 @@
>  *
>  */
> 
>+#include <sys/cdefs.h>
>+__FBSDID("$FreeBSD$");
>+
> #include "namespace.h"
> #include <sys/types.h>
> #include <sys/mman.h>
>@@ -87,85 +92,19 @@
> #include <pthread.h>
> #include "un-namespace.h"
> 
>+#include "libc_private.h"
> #include "thr_private.h"
> 
>-extern int	__creat(const char *, mode_t);
>-extern int	__pselect(int, fd_set *, fd_set *, fd_set *,
>-			const struct timespec *, const sigset_t *);
>-extern unsigned	__sleep(unsigned int);
>-extern int	__system(const char *);
>-extern int	__tcdrain(int);
>-extern int	__usleep(useconds_t);
>-extern pid_t	__wait(int *);
>-extern pid_t	__waitpid(pid_t, int *, int);
>-extern int	__sys_aio_suspend(const struct aiocb * const[], int,
>-			const struct timespec *);
>-extern int	__sys_accept(int, struct sockaddr *, socklen_t *);
>-extern int	__sys_accept4(int, struct sockaddr *, socklen_t *, int);
>-extern int	__sys_connect(int, const struct sockaddr *, socklen_t);
>-extern int	__sys_fsync(int);
>-extern int	__sys_msync(void *, size_t, int);
>-extern int	__sys_pselect(int, fd_set *, fd_set *, fd_set *,
>-			const struct timespec *, const sigset_t *);
>-extern int	__sys_poll(struct pollfd *, unsigned, int);
>-extern ssize_t	__sys_recv(int, void *, size_t, int);
>-extern ssize_t	__sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
>-extern ssize_t	__sys_recvmsg(int, struct msghdr *, int);
>-extern int	__sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
>-extern int	__sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *,
>-			off_t *, int);
>-extern ssize_t	__sys_sendmsg(int, const struct msghdr *, int);
>-extern ssize_t	__sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t);
>-extern ssize_t	__sys_readv(int, const struct iovec *, int);
>-extern pid_t	__sys_wait4(pid_t, int *, int, struct rusage *);
>-extern ssize_t	__sys_writev(int, const struct iovec *, int);
>-
>-int	___creat(const char *, mode_t);
>-int	___pselect(int, fd_set *, fd_set *, fd_set *, 
>-		const struct timespec *, const sigset_t *);
>-unsigned	___sleep(unsigned);
>-int	___system(const char *);
>-int	___tcdrain(int);
>-int	___usleep(useconds_t useconds);
>-pid_t	___wait(int *);
>-pid_t	___waitpid(pid_t, int *, int);
>-int	__accept(int, struct sockaddr *, socklen_t *);
>-int	__accept4(int, struct sockaddr *, socklen_t *, int);
>-int	__aio_suspend(const struct aiocb * const iocbs[], int,
>-		const struct timespec *);
>-int	__close(int);
>-int	__connect(int, const struct sockaddr *, socklen_t);
>-int	__fcntl(int, int,...);
> #ifdef SYSCALL_COMPAT
>-extern int __fcntl_compat(int, int,...);
>+extern int __fcntl_compat(int, int, ...);
> #endif
>-int	__fsync(int);
>-int	__msync(void *, size_t, int);
>-int	__nanosleep(const struct timespec *, struct timespec *);
>-int	__open(const char *, int,...);
>-int	__openat(int, const char *, int,...);
>-int	__poll(struct pollfd *, unsigned int, int);
>-ssize_t	__read(int, void *buf, size_t);
>-ssize_t	__readv(int, const struct iovec *, int);
>-ssize_t	__recvfrom(int, void *, size_t, int f, struct sockaddr *, socklen_t *);
>-ssize_t	__recvmsg(int, struct msghdr *, int);
>-int	__select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
>-ssize_t	__sendmsg(int, const struct msghdr *, int);
>-ssize_t	__sendto(int, const void *, size_t, int,
>-		const struct sockaddr *, socklen_t);
>-pid_t	__wait3(int *, int, struct rusage *);
>-pid_t	__wait4(pid_t, int *, int, struct rusage *);
>-ssize_t	__write(int, const void *, size_t);
>-ssize_t	__writev(int, const struct iovec *, int);
>-
>-__weak_reference(__accept, accept);
> 
> /*
>  * Cancellation behavior:
>  *   If thread is canceled, no socket is created.
>  */
>-int
>-__accept(int s, struct sockaddr *addr, socklen_t *addrlen)
>+static int
>+__thr_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
> {
> 	struct pthread *curthread;
> 	int ret;
>@@ -178,14 +117,12 @@ __accept(int s, struct sockaddr *addr, socklen_t *addrlen)
>  	return (ret);
> }
> 
>-__weak_reference(__accept4, accept4);
>-
> /*
>  * Cancellation behavior:
>  *   If thread is canceled, no socket is created.
>  */
>-int
>-__accept4(int s, struct sockaddr *addr, socklen_t *addrlen, int flags)
>+static int
>+__thr_accept4(int s, struct sockaddr *addr, socklen_t *addrlen, int flags)
> {
> 	struct pthread *curthread;
> 	int ret;
>@@ -198,15 +135,14 @@ __accept4(int s, struct sockaddr *addr, socklen_t *addrlen, int flags)
>  	return (ret);
> }
> 
>-__weak_reference(__aio_suspend, aio_suspend);
>-
>-int
>-__aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
>+static int
>+__thr_aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
>     timespec *timeout)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_aio_suspend(iocbs, niocb, timeout);
> 	_thr_cancel_leave(curthread, 1);
>@@ -214,8 +150,6 @@ __aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
> 	return (ret);
> }
> 
>-__weak_reference(__close, close);
>-
> /*
>  * Cancellation behavior:
>  *   According to manual of close(), the file descriptor is always deleted.
>@@ -223,12 +157,13 @@ __weak_reference(__close, close);
>  *   descriptor is always deleted despite whether the thread is canceled
>  *   or not.
>  */
>-int
>-__close(int fd)
>+static int
>+__thr_close(int fd)
> {
>-	struct pthread	*curthread = _get_curthread();
>-	int	ret;
>+	struct pthread *curthread;
>+	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter2(curthread, 0);
> 	ret = __sys_close(fd);
> 	_thr_cancel_leave(curthread, 1);
>@@ -236,18 +171,17 @@ __close(int fd)
> 	return (ret);
> }
> 
>-__weak_reference(__connect, connect);
>-
> /*
>  * Cancellation behavior:
>  *   If the thread is canceled, connection is not made.
>  */
>-int
>-__connect(int fd, const struct sockaddr *name, socklen_t namelen)
>+static int
>+__thr_connect(int fd, const struct sockaddr *name, socklen_t namelen)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_connect(fd, name, namelen);
> 	_thr_cancel_leave(curthread, ret == -1);
>@@ -255,27 +189,25 @@ __connect(int fd, const struct sockaddr *name, socklen_t namelen)
>  	return (ret);
> }
> 
>-__weak_reference(___creat, creat);
> 
> /*
>  * Cancellation behavior:
>  *   If thread is canceled, file is not created.
>  */
>-int
>-___creat(const char *path, mode_t mode)
>+static int
>+__thr_creat(const char *path, mode_t mode)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = __creat(path, mode);
>+	ret = __libc_creat(path, mode);
> 	_thr_cancel_leave(curthread, ret == -1);
> 	
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__fcntl, fcntl);
>-
> /*
>  * Cancellation behavior:
>  *   According to specification, only F_SETLKW is a cancellation point.
>@@ -283,13 +215,14 @@ __weak_reference(__fcntl, fcntl);
>  *   is failure, this means the function does not generate side effect
>  *   if it is canceled.
>  */
>-int
>-__fcntl(int fd, int cmd,...)
>+static int
>+__thr_fcntl(int fd, int cmd, ...)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int	ret;
>+	struct pthread *curthread;
>+	int ret;
> 	va_list	ap;
> 
>+	curthread = _get_curthread();
> 	va_start(ap, cmd);
> 	if (cmd == F_OSETLKW || cmd == F_SETLKW) {
> 		_thr_cancel_enter(curthread);
>@@ -311,18 +244,17 @@ __fcntl(int fd, int cmd,...)
> 	return (ret);
> }
> 
>-__weak_reference(__fsync, fsync);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled after system call.
>  */
>-int
>-__fsync(int fd)
>+static int
>+__thr_fsync(int fd)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int	ret;
>+	struct pthread *curthread;
>+	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter2(curthread, 0);
> 	ret = __sys_fsync(fd);
> 	_thr_cancel_leave(curthread, 1);
>@@ -330,34 +262,32 @@ __fsync(int fd)
> 	return (ret);
> }
> 
>-__weak_reference(__msync, msync);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled after system call.
>  */
>-int
>-__msync(void *addr, size_t len, int flags)
>+static int
>+__thr_msync(void *addr, size_t len, int flags)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int	ret;
>+	struct pthread *curthread;
>+	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter2(curthread, 0);
> 	ret = __sys_msync(addr, len, flags);
> 	_thr_cancel_leave(curthread, 1);
> 
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__nanosleep, nanosleep);
>-
>-int
>-__nanosleep(const struct timespec *time_to_sleep,
>+static int
>+__thr_nanosleep(const struct timespec *time_to_sleep,
>     struct timespec *time_remaining)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int		ret;
>+	struct pthread *curthread;
>+	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_nanosleep(time_to_sleep, time_remaining);
> 	_thr_cancel_leave(curthread, 1);
>@@ -365,99 +295,97 @@ __nanosleep(const struct timespec *time_to_sleep,
> 	return (ret);
> }
> 
>-__weak_reference(__open, open);
>-
> /*
>  * Cancellation behavior:
>  *   If the thread is canceled, file is not opened.
>  */
>-int
>-__open(const char *path, int flags,...)
>+static int
>+__thr_open(const char *path, int flags,...)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int	ret;
>-	int	mode = 0;
>+	struct pthread *curthread;
>+	int mode, ret;
> 	va_list	ap;
> 
> 	/* Check if the file is being created: */
>-	if (flags & O_CREAT) {
>+	if ((flags & O_CREAT) != 0) {
> 		/* Get the creation mode: */
> 		va_start(ap, flags);
> 		mode = va_arg(ap, int);
> 		va_end(ap);
>+	} else {
>+		mode = 0;
> 	}
> 	
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_open(path, flags, mode);
> 	_thr_cancel_leave(curthread, ret == -1);
> 
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__openat, openat);
>-
> /*
>  * Cancellation behavior:
>  *   If the thread is canceled, file is not opened.
>  */
>-int
>-__openat(int fd, const char *path, int flags, ...)
>+static int
>+__thr_openat(int fd, const char *path, int flags, ...)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int	ret;
>-	int	mode = 0;
>+	struct pthread *curthread;
>+	int mode, ret;
> 	va_list	ap;
> 
> 	
> 	/* Check if the file is being created: */
>-	if (flags & O_CREAT) {
>+	if ((flags & O_CREAT) != 0) {
> 		/* Get the creation mode: */
> 		va_start(ap, flags);
> 		mode = va_arg(ap, int);
> 		va_end(ap);
>+	} else {
>+		mode = 0;
> 	}
> 	
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_openat(fd, path, flags, mode);
> 	_thr_cancel_leave(curthread, ret == -1);
> 
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__poll, poll);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call returns something,
>  *   the thread is not canceled.
>  */
>-int
>-__poll(struct pollfd *fds, unsigned int nfds, int timeout)
>+static int
>+__thr_poll(struct pollfd *fds, unsigned int nfds, int timeout)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_poll(fds, nfds, timeout);
> 	_thr_cancel_leave(curthread, ret == -1);
> 
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(___pselect, pselect);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call returns something,
>  *   the thread is not canceled.
>  */
>-int 
>-___pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds, 
>+static int
>+__thr_pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds, 
> 	const struct timespec *timo, const sigset_t *mask)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_pselect(count, rfds, wfds, efds, timo, mask);
> 	_thr_cancel_leave(curthread, ret == -1);
>@@ -465,321 +393,352 @@ ___pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
> 	return (ret);
> }
> 
>-__weak_reference(__read, read);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call got some data, 
>  *   the thread is not canceled.
>  */
>-ssize_t
>-__read(int fd, void *buf, size_t nbytes)
>+static ssize_t
>+__thr_read(int fd, void *buf, size_t nbytes)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t	ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_read(fd, buf, nbytes);
> 	_thr_cancel_leave(curthread, ret == -1);
> 
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__readv, readv);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call got some data, 
>  *   the thread is not canceled.
>  */
>-ssize_t
>-__readv(int fd, const struct iovec *iov, int iovcnt)
>+static ssize_t
>+__thr_readv(int fd, const struct iovec *iov, int iovcnt)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_readv(fd, iov, iovcnt);
> 	_thr_cancel_leave(curthread, ret == -1);
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__recvfrom, recvfrom);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call got some data, 
>  *   the thread is not canceled.
>  */
>-ssize_t
>-__recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from,
>+static ssize_t
>+__thr_recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from,
>     socklen_t *fl)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_recvfrom(s, b, l, f, from, fl);
> 	_thr_cancel_leave(curthread, ret == -1);
> 	return (ret);
> }
> 
>-__weak_reference(__recvmsg, recvmsg);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call got some data, 
>  *   the thread is not canceled.
>  */
>-ssize_t
>-__recvmsg(int s, struct msghdr *m, int f)
>+static ssize_t
>+__thr_recvmsg(int s, struct msghdr *m, int f)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_recvmsg(s, m, f);
> 	_thr_cancel_leave(curthread, ret == -1);
> 	return (ret);
> }
> 
>-__weak_reference(__select, select);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call returns something,
>  *   the thread is not canceled.
>  */
>-int 
>-__select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
>+static int 
>+__thr_select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
> 	struct timeval *timeout)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
> 	_thr_cancel_leave(curthread, ret == -1);
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__sendmsg, sendmsg);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call sent
>  *   data, the thread is not canceled.
>  */
>-ssize_t
>-__sendmsg(int s, const struct msghdr *m, int f)
>+static ssize_t
>+__thr_sendmsg(int s, const struct msghdr *m, int f)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_sendmsg(s, m, f);
> 	_thr_cancel_leave(curthread, ret <= 0);
> 	return (ret);
> }
> 
>-__weak_reference(__sendto, sendto);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call sent some
>  *   data, the thread is not canceled.
>  */
>-ssize_t
>-__sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t,
>+static ssize_t
>+__thr_sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t,
>     socklen_t tl)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_sendto(s, m, l, f, t, tl);
> 	_thr_cancel_leave(curthread, ret <= 0);
> 	return (ret);
> }
> 
>-__weak_reference(___sleep, sleep);
>-
>-unsigned int
>-___sleep(unsigned int seconds)
>+static unsigned int
>+__thr_sleep(unsigned int seconds)
> {
>-	struct pthread *curthread = _get_curthread();
>-	unsigned int	ret;
>+	struct pthread *curthread;
>+	unsigned int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = __sleep(seconds);
>+	ret = __libc_sleep(seconds);
> 	_thr_cancel_leave(curthread, 1);
>-	
> 	return (ret);
> }
> 
>-__weak_reference(___system, system);
>-
>-int
>-___system(const char *string)
>+static int
>+__thr_system(const char *string)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int	ret;
>+	struct pthread *curthread;
>+	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = __system(string);
>+	ret = __libc_system(string);
> 	_thr_cancel_leave(curthread, 1);
>-	
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(___tcdrain, tcdrain);
>-
> /*
>  * Cancellation behavior:
>  *   If thread is canceled, the system call is not completed,
>  *   this means not all bytes were drained.
>  */
>-int
>-___tcdrain(int fd)
>+static int
>+__thr_tcdrain(int fd)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int	ret;
>+	struct pthread *curthread;
>+	int ret;
> 	
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = __tcdrain(fd);
>+	ret = __libc_tcdrain(fd);
> 	_thr_cancel_leave(curthread, ret == -1);
> 	return (ret);
> }
> 
>-__weak_reference(___usleep, usleep);
>-
>-int
>-___usleep(useconds_t useconds)
>+static int
>+__thr_usleep(useconds_t useconds)
> {
>-	struct pthread *curthread = _get_curthread();
>-	int		ret;
>+	struct pthread *curthread;
>+	int ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = __usleep(useconds);
>+	ret = __libc_usleep(useconds);
> 	_thr_cancel_leave(curthread, 1);
>-	
> 	return (ret);
> }
> 
>-__weak_reference(___wait, wait);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call returns
>  *   a child pid, the thread is not canceled.
>  */
>-pid_t
>-___wait(int *istat)
>+static pid_t
>+__thr_wait(int *istat)
> {
>-	struct pthread *curthread = _get_curthread();
>-	pid_t	ret;
>+	struct pthread *curthread;
>+	pid_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = __wait(istat);
>+	ret = __libc_wait(istat);
> 	_thr_cancel_leave(curthread, ret <= 0);
>-
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__wait3, wait3);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call returns
>  *   a child pid, the thread is not canceled.
>  */
>-pid_t
>-__wait3(int *status, int options, struct rusage *rusage)
>+static pid_t
>+__thr_wait3(int *status, int options, struct rusage *rusage)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	pid_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = _wait4(WAIT_ANY, status, options, rusage);
>+	ret = __libc_wait3(status, options, rusage);
> 	_thr_cancel_leave(curthread, ret <= 0);
>-
> 	return (ret);
> }
> 
>-__weak_reference(__wait4, wait4);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call returns
>  *   a child pid, the thread is not canceled.
>  */
>-pid_t
>-__wait4(pid_t pid, int *status, int options, struct rusage *rusage)
>+static pid_t
>+__thr_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	pid_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_wait4(pid, status, options, rusage);
> 	_thr_cancel_leave(curthread, ret <= 0);
>-
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(___waitpid, waitpid);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the system call returns
>  *   a child pid, the thread is not canceled.
>  */
>-pid_t
>-___waitpid(pid_t wpid, int *status, int options)
>+static pid_t
>+__thr_waitpid(pid_t wpid, int *status, int options)
> {
>-	struct pthread *curthread = _get_curthread();
>-	pid_t	ret;
>+	struct pthread *curthread;
>+	pid_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
>-	ret = __waitpid(wpid, status, options);
>+	ret = __libc_waitpid(wpid, status, options);
> 	_thr_cancel_leave(curthread, ret <= 0);
>-	
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__write, write);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the thread wrote some data,
>  *   it is not canceled.
>  */
>-ssize_t
>-__write(int fd, const void *buf, size_t nbytes)
>+static ssize_t
>+__thr_write(int fd, const void *buf, size_t nbytes)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t	ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_write(fd, buf, nbytes);
> 	_thr_cancel_leave(curthread, (ret <= 0));
>-	return ret;
>+	return (ret);
> }
> 
>-__weak_reference(__writev, writev);
>-
> /*
>  * Cancellation behavior:
>  *   Thread may be canceled at start, but if the thread wrote some data,
>  *   it is not canceled.
>  */
>-ssize_t
>-__writev(int fd, const struct iovec *iov, int iovcnt)
>+static ssize_t
>+__thr_writev(int fd, const struct iovec *iov, int iovcnt)
> {
>-	struct pthread *curthread = _get_curthread();
>+	struct pthread *curthread;
> 	ssize_t ret;
> 
>+	curthread = _get_curthread();
> 	_thr_cancel_enter(curthread);
> 	ret = __sys_writev(fd, iov, iovcnt);
> 	_thr_cancel_leave(curthread, (ret <= 0));
>-	return ret;
>+	return (ret);
>+}
>+
>+void
>+__thr_interpose_libc(void)
>+{
>+
>+	__error_selector = __error_threaded;
>+#define	SLOT(name)					\
>+	*(__libc_interposing_slot(INTERPOS_##name)) =	\
>+	    (interpos_func_t)__thr_##name;
>+	SLOT(accept);
>+	SLOT(accept4);
>+	SLOT(aio_suspend);
>+	SLOT(close);
>+	SLOT(connect);
>+	SLOT(creat);
>+	SLOT(fcntl);
>+	SLOT(fsync);
>+	SLOT(msync);
>+	SLOT(nanosleep);
>+	SLOT(open);
>+	SLOT(openat);
>+	SLOT(poll);
>+	SLOT(pselect);
>+	SLOT(raise);
>+	SLOT(read);
>+	SLOT(readv);
>+	SLOT(recvfrom);
>+	SLOT(recvmsg);
>+	SLOT(select);
>+	SLOT(sendmsg);
>+	SLOT(sendto);
>+	SLOT(setcontext);
>+	SLOT(sigaction);
>+	SLOT(sigprocmask);
>+	SLOT(sigsuspend);
>+	SLOT(sigwait);
>+	SLOT(sigtimedwait);
>+	SLOT(sigwaitinfo);
>+	SLOT(swapcontext);
>+	SLOT(system);
>+	SLOT(sleep);
>+	SLOT(tcdrain);
>+	SLOT(usleep);
>+	SLOT(pause);
>+	SLOT(wait);
>+	SLOT(wait3);
>+	SLOT(wait4);
>+	SLOT(waitpid);
>+	SLOT(write);
>+	SLOT(writev);
>+#undef SLOT
>+	*(__libc_interposing_slot(
>+	    INTERPOS__pthread_mutex_init_calloc_cb)) =
>+	    (interpos_func_t)_pthread_mutex_init_calloc_cb;
> }
>diff --git a/libexec/rtld-elf/Symbol.map b/libexec/rtld-elf/Symbol.map
>index 5ea7d7e..4adc2ad 100644
>--- a/libexec/rtld-elf/Symbol.map
>+++ b/libexec/rtld-elf/Symbol.map
>@@ -30,5 +30,6 @@ FBSDprivate_1.0 {
>     _rtld_atfork_post;
>     _rtld_addr_phdr;
>     _rtld_get_stack_prot;
>+    _rtld_is_dlopened;
>     _r_debug_postinit;
> };
>diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c
>index 6bbb10c..1550da1 100644
>--- a/libexec/rtld-elf/rtld.c
>+++ b/libexec/rtld-elf/rtld.c
>@@ -2222,6 +2222,7 @@ do_load_object(int fd, const char *name, char *path, struct stat *sbp,
> 	return (NULL);
>     }
> 
>+    obj->dlopened = (flags & RTLD_LO_DLOPEN) != 0;
>     *obj_tail = obj;
>     obj_tail = &obj->next;
>     obj_count++;
>@@ -4884,6 +4885,27 @@ _rtld_get_stack_prot(void)
> 	return (stack_prot);
> }
> 
>+int
>+_rtld_is_dlopened(void *arg)
>+{
>+	Obj_Entry *obj;
>+	RtldLockState lockstate;
>+	int res;
>+
>+	rlock_acquire(rtld_bind_lock, &lockstate);
>+	obj = dlcheck(arg);
>+	if (obj == NULL)
>+		obj = obj_from_addr(arg);
>+	if (obj == NULL) {
>+		_rtld_error("No shared object contains address");
>+		lock_release(rtld_bind_lock, &lockstate);
>+		return (-1);
>+	}
>+	res = obj->dlopened ? 1 : 0;
>+	lock_release(rtld_bind_lock, &lockstate);
>+	return (res);
>+}
>+
> static void
> map_stacks_exec(RtldLockState *lockstate)
> {
>diff --git a/libexec/rtld-elf/rtld.h b/libexec/rtld-elf/rtld.h
>index ace229f..e539117 100644
>--- a/libexec/rtld-elf/rtld.h
>+++ b/libexec/rtld-elf/rtld.h
>@@ -275,6 +275,7 @@ typedef struct Struct_Obj_Entry {
>     bool crt_no_init : 1;	/* Object' crt does not call _init/_fini */
>     bool valid_hash_sysv : 1;	/* A valid System V hash hash tag is available */
>     bool valid_hash_gnu : 1;	/* A valid GNU hash tag is available */
>+    bool dlopened : 1;		/* dlopen()-ed (vs. load statically) */
> 
>     struct link_map linkmap;	/* For GDB and dlinfo() */
>     Objlist dldags;		/* Object belongs to these dlopened DAGs (%) */
>diff --git a/sys/sys/link_elf.h b/sys/sys/link_elf.h
>index 35fe68e..c228f1d 100644
>--- a/sys/sys/link_elf.h
>+++ b/sys/sys/link_elf.h
>@@ -94,6 +94,7 @@ typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
> extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
> int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
> int _rtld_get_stack_prot(void);
>+int _rtld_is_dlopened(void *);
> 
> #ifdef __ARM_EABI__
> void * dl_unwind_find_exidx(const void *, int *);

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Attachments on bug 196354: 151071 | 151127