Fix known issues which blow up the process after dlopen("libthr.so")

(or loading a dso linked to libthr.so into process which was not
linked against threading library).

MFC r276630:
Remove interposing, fix malloc, reinstall signal handlers wrappers on
libthr load.

MFC r276681:
Avoid calling internal libc function through PLT or accessing data
though GOT.

MFC r277032:
Reduce the size of the interposing table and amount of
cancellation-handling code in the libthr.

MFC note:
r276646 ("do not erronously export 'openat' symbol from rtld") is not
applicable to stable/10 yet, since PATHFDS support was not merged.

1 files changed, 5 insertions, 4 deletions

diff --git a/lib/libc/gen/pause.c b/lib/libc/gen/pause.c
index 51706cf..ef48c1c 100644
--- a/lib/libc/gen/pause.c
+++ b/lib/libc/gen/pause.c
@@ -33,10 +33,10 @@ static char sccsid[] = "@(#)pause.c	8.1 (Berkeley) 6/4/93";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include "namespace.h"
 #include <signal.h>
 #include <unistd.h>
-#include "un-namespace.h"
+
+#include "libc_private.h"
 
 /*
  * Backwards compatible pause.
@@ -46,9 +46,10 @@ __pause(void)
 {
 	sigset_t oset;
 
-	if (_sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
+	if (sigprocmask(SIG_BLOCK, NULL, &oset) == -1)
 		return (-1);
-	return (_sigsuspend(&oset));
+	return (sigsuspend(&oset));
 }
+
 __weak_reference(__pause, pause);
 __weak_reference(__pause, _pause);