Use a Thread Information Block in both single and multi-threaded programs.

This stores errno, the cancelation flags, and related bits for each thread
and is allocated by ld.so or libc.a.  This is an ABI break from 5.9-stable!

Make libpthread dlopen'able by moving the cancelation wrappers into libc
and doing locking and fork/errno handling via callbacks that libpthread
registers when it first initializes.  'errno' *must* be declared via
<errno.h> now!

Clean up libpthread's symbol exports like libc.

On powerpc, offset the TIB/TCB/TLS data from the register per the ELF spec.

Testing by various, particularly sthen@ and patrick@
ok kettenis@

6 files changed, 95 insertions, 5 deletions

diff --git a/lib/libc/hidden/sys/mman.h b/lib/libc/hidden/sys/mman.h
index b01a4a9deff..655bf571ca5 100644
--- a/lib/libc/hidden/sys/mman.h
+++ b/lib/libc/hidden/sys/mman.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mman.h,v 1.2 2015/09/12 15:01:33 guenther Exp $	*/
+/*	$OpenBSD: mman.h,v 1.3 2016/05/07 19:05:22 guenther Exp $	*/
 /*
  * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
  *
@@ -28,7 +28,7 @@ PROTO_NORMAL(mlockall);
 PROTO_NORMAL(mmap);
 PROTO_NORMAL(mprotect);
 PROTO_NORMAL(mquery);
-/*PROTO_CANCEL(msync);*/
+PROTO_CANCEL(msync);
 PROTO_NORMAL(munlock);
 PROTO_NORMAL(munlockall);
 PROTO_NORMAL(munmap);
diff --git a/lib/libc/hidden/sys/msg.h b/lib/libc/hidden/sys/msg.h
new file mode 100644
index 00000000000..8208c739f6d
--- /dev/null
+++ b/lib/libc/hidden/sys/msg.h
@@ -0,0 +1,28 @@
+/*	$OpenBSD: msg.h,v 1.1 2016/05/07 19:05:22 guenther Exp $	*/
+/*
+ * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _LIBC_SYS_MSG_H_
+#define _LIBC_SYS_MSG_H_
+
+#include_next <sys/msg.h>
+
+PROTO_NORMAL(msgctl);
+PROTO_NORMAL(msgget);
+PROTO_CANCEL(msgrcv);
+PROTO_CANCEL(msgsnd);
+
+#endif /* !_LIBC_SYS_MSG_H_ */
diff --git a/lib/libc/hidden/sys/select.h b/lib/libc/hidden/sys/select.h
new file mode 100644
index 00000000000..f67f3e5ee7e
--- /dev/null
+++ b/lib/libc/hidden/sys/select.h
@@ -0,0 +1,27 @@
+/*	$OpenBSD: select.h,v 1.1 2016/05/07 19:05:22 guenther Exp $	*/
+/*
+ * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+/*	$OpenBSD: select.h,v 1.1 2016/05/07 19:05:22 guenther Exp $	*/
+
+#ifndef _LIBC_SYS_SELECT_H_
+#define	_LIBC_SYS_SELECT_H_
+
+#include_next <sys/select.h>
+
+PROTO_CANCEL(select);
+PROTO_CANCEL(pselect);
+
+#endif /* !_LIBC_SYS_SELECT_H_ */
diff --git a/lib/libc/hidden/sys/socket.h b/lib/libc/hidden/sys/socket.h
index d262e0f3bac..2d8b3e4f120 100644
--- a/lib/libc/hidden/sys/socket.h
+++ b/lib/libc/hidden/sys/socket.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: socket.h,v 1.3 2015/10/04 07:17:27 guenther Exp $	*/
+/*	$OpenBSD: socket.h,v 1.4 2016/05/07 19:05:22 guenther Exp $	*/
 /*
  * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
  *
@@ -20,7 +20,10 @@
 
 #include_next <sys/socket.h>
 
+PROTO_CANCEL(accept);
+PROTO_CANCEL(accept4);
 PROTO_NORMAL(bind);
+PROTO_CANCEL(connect);
 PROTO_DEPRECATED(getpeereid);
 PROTO_NORMAL(getpeername);
 PROTO_NORMAL(getrtable);
@@ -28,7 +31,11 @@ PROTO_NORMAL(getsockname);
 PROTO_NORMAL(getsockopt);
 PROTO_NORMAL(listen);
 PROTO_NORMAL(recv);
+PROTO_CANCEL(recvfrom);
+PROTO_CANCEL(recvmsg);
 PROTO_NORMAL(send);
+PROTO_CANCEL(sendmsg);
+PROTO_CANCEL(sendto);
 PROTO_NORMAL(setrtable);
 PROTO_NORMAL(setsockopt);
 PROTO_NORMAL(shutdown);
diff --git a/lib/libc/hidden/sys/uio.h b/lib/libc/hidden/sys/uio.h
new file mode 100644
index 00000000000..8db874ed537
--- /dev/null
+++ b/lib/libc/hidden/sys/uio.h
@@ -0,0 +1,28 @@
+/*	$OpenBSD: uio.h,v 1.1 2016/05/07 19:05:22 guenther Exp $	*/
+/*
+ * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _LIBC_SYS_UIO_H_
+#define	_LIBC_SYS_UIO_H_
+
+#include_next <sys/uio.h>
+
+PROTO_CANCEL(preadv);
+PROTO_CANCEL(pwritev);
+PROTO_CANCEL(readv);
+PROTO_CANCEL(writev);
+
+#endif /* !_LIBC_SYS_UIO_H_ */
diff --git a/lib/libc/hidden/sys/wait.h b/lib/libc/hidden/sys/wait.h
index 4fdf0be1690..b73d383220b 100644
--- a/lib/libc/hidden/sys/wait.h
+++ b/lib/libc/hidden/sys/wait.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wait.h,v 1.1 2015/10/25 19:15:56 guenther Exp $	*/
+/*	$OpenBSD: wait.h,v 1.2 2016/05/07 19:05:22 guenther Exp $	*/
 /*
  * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
  *
@@ -23,6 +23,6 @@
 PROTO_DEPRECATED(wait);
 PROTO_NORMAL(waitpid);
 PROTO_DEPRECATED(wait3);
-/*PROTO_CANCEL(wait4);*/
+PROTO_CANCEL(wait4);
 
 #endif /* !_LIBC_SYS_WAIT_H_ */