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, 76 deletions

diff --git a/lib/libc/thread/unithread_malloc_lock.c b/lib/libc/thread/unithread_malloc_lock.c
deleted file mode 100644
index d813bc708f2..00000000000
--- a/lib/libc/thread/unithread_malloc_lock.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*	$OpenBSD: unithread_malloc_lock.c,v 1.9 2015/04/07 01:27:07 guenther Exp $	*/
-
-#include <sys/time.h>
-#include "thread_private.h"
-
-WEAK_PROTOTYPE(_thread_malloc_lock);
-WEAK_PROTOTYPE(_thread_malloc_unlock);
-
-WEAK_ALIAS(_thread_malloc_lock);
-WEAK_ALIAS(_thread_malloc_unlock);
-
-WEAK_PROTOTYPE(_thread_atexit_lock);
-WEAK_PROTOTYPE(_thread_atexit_unlock);
-
-WEAK_ALIAS(_thread_atexit_lock);
-WEAK_ALIAS(_thread_atexit_unlock);
-
-WEAK_PROTOTYPE(_thread_atfork_lock);
-WEAK_PROTOTYPE(_thread_atfork_unlock);
-
-WEAK_ALIAS(_thread_atfork_lock);
-WEAK_ALIAS(_thread_atfork_unlock);
-
-WEAK_PROTOTYPE(_thread_arc4_lock);
-WEAK_PROTOTYPE(_thread_arc4_unlock);
-
-WEAK_ALIAS(_thread_arc4_lock);
-WEAK_ALIAS(_thread_arc4_unlock);
-
-void
-WEAK_NAME(_thread_malloc_lock)(void)
-{
-	return;
-}
-
-void
-WEAK_NAME(_thread_malloc_unlock)(void)
-{
-	return;
-}
-
-void
-WEAK_NAME(_thread_atexit_lock)(void)
-{
-	return;
-}
-
-void
-WEAK_NAME(_thread_atexit_unlock)(void)
-{
-	return;
-}
-
-void
-WEAK_NAME(_thread_atfork_lock)(void)
-{
-	return;
-}
-
-void
-WEAK_NAME(_thread_atfork_unlock)(void)
-{
-	return;
-}
-
-void
-WEAK_NAME(_thread_arc4_lock)(void)
-{
-	return;
-}
-
-void
-WEAK_NAME(_thread_arc4_unlock)(void)
-{
-	return;
-}