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@

1 files changed, 0 insertions, 49 deletions

diff --git a/lib/libc/thread/unithread_mutex.c b/lib/libc/thread/unithread_mutex.c
deleted file mode 100644
index 44009de7c01..00000000000
--- a/lib/libc/thread/unithread_mutex.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/* $OpenBSD: unithread_mutex.c,v 1.1 2007/06/05 18:11:48 kurt Exp $ */
-
-/*
- * Copyright (c) 2007 Kurt Miller <kurt@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.
- */
-
-#include <sys/types.h>
-#include "thread_private.h"
-
-WEAK_PROTOTYPE(_thread_mutex_lock);
-WEAK_PROTOTYPE(_thread_mutex_unlock);
-WEAK_PROTOTYPE(_thread_mutex_destroy);
-
-WEAK_ALIAS(_thread_mutex_lock);
-WEAK_ALIAS(_thread_mutex_unlock);
-WEAK_ALIAS(_thread_mutex_destroy);
-
-/* ARGSUSED */
-void
-WEAK_NAME(_thread_mutex_lock)(void **mutex)
-{
-	return;
-}
-
-/* ARGSUSED */
-void
-WEAK_NAME(_thread_mutex_unlock)(void **mutex)
-{
-	return;
-}
-
-/* ARGSUSED */
-void
-WEAK_NAME(_thread_mutex_destroy)(void **mutex)
-{
-	return;
-}