Merge the sigaction() and sigprocmask() overloads/wrappers from libpthread

into libc, and move pthread_sigmask() as well (just a trivial wrapper).
This provides consistent handling of SIGTHR between single- and multi-threaded
programs and is a step in the merge of all the libpthread overloads, providing
some ASM and Makefile bits that the other wrappers will need.

ok deraadt@ millert@

43 files changed, 250 insertions, 149 deletions

diff --git a/lib/libc/Symbols.list b/lib/libc/Symbols.list
index 3c32bac4966..09da8af364b 100644
--- a/lib/libc/Symbols.list
+++ b/lib/libc/Symbols.list
@@ -364,6 +364,7 @@ pread
 preadv
 profil
 pselect
+pthread_sigmask
 ptrace
 pwrite
 pwritev
diff --git a/lib/libc/arch/alpha/SYS.h b/lib/libc/arch/alpha/SYS.h
index 41b3cee56d3..c1bb2bef372 100644
--- a/lib/libc/arch/alpha/SYS.h
+++ b/lib/libc/arch/alpha/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.12 2015/09/10 13:29:09 guenther Exp $	*/
+/*	$OpenBSD: SYS.h,v 1.13 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: SYS.h,v 1.4 1996/10/17 03:03:53 cgd Exp $	*/
 
 /*
@@ -132,7 +132,9 @@ __END(p,label);
 # define PSEUDO_NOERROR(x,y)	ALIAS(_thread_sys_,x) \
 				__PSEUDO_NOERROR(_thread_sys_,x,y); \
 				_END(x)
+# define SYSLEAF_HIDDEN(x,e)	__LEAF(_thread_sys_,x,e)
 # define SYSLEAF(x,e)		ALIAS(_thread_sys_,x) \
-				__LEAF(_thread_sys_,x,e)
-# define SYSEND(x)		__END(_thread_sys_,x); \
+				SYSLEAF_HIDDEN(x,e)
+# define SYSCALL_END_HIDDEN(x)	__END(_thread_sys_,x)
+# define SYSCALL_END(x)		SYSCALL_END_HIDDEN(x); \
 				_END(x)
diff --git a/lib/libc/arch/alpha/sys/sigpending.S b/lib/libc/arch/alpha/sys/sigpending.S
index 1accad82973..e1d73dff9c7 100644
--- a/lib/libc/arch/alpha/sys/sigpending.S
+++ b/lib/libc/arch/alpha/sys/sigpending.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigpending.S,v 1.5 2005/08/07 16:40:13 espie Exp $	*/
+/*	$OpenBSD: sigpending.S,v 1.6 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: sigpending.S,v 1.1 1995/02/10 17:50:40 cgd Exp $	*/
 
 /*
@@ -34,4 +34,4 @@ SYSCALL(sigpending)
 	stl	v0, 0(a0)
 	mov	zero, v0
 	RET
-SYSEND(sigpending)
+SYSCALL_END(sigpending)
diff --git a/lib/libc/arch/alpha/sys/sigprocmask.S b/lib/libc/arch/alpha/sys/sigprocmask.S
index 2f7d7bda2c7..d7f3659b19d 100644
--- a/lib/libc/arch/alpha/sys/sigprocmask.S
+++ b/lib/libc/arch/alpha/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.5 2005/08/07 16:40:13 espie Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.6 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: sigprocmask.S,v 1.2 1996/10/17 03:08:21 cgd Exp $	*/
 
 /*
@@ -30,7 +30,7 @@
 
 #include "SYS.h"
 
-SYSLEAF(sigprocmask, 3)
+SYSLEAF_HIDDEN(sigprocmask, 3)
 	mov	a2, a5			/* safe */
 	cmoveq	a1, 1, a0		/* if set == NULL, how = SIG_BLOCK */
 	beq	a1, Ldoit		/* and set = 0, and do it. */
@@ -41,4 +41,4 @@ Ldoit:	CALLSYS_ERROR(sigprocmask)
 Lret:	mov	zero, v0
 	RET
 
-SYSEND(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/alpha/sys/sigsuspend.S b/lib/libc/arch/alpha/sys/sigsuspend.S
index 61a81f51e39..f5201db29f6 100644
--- a/lib/libc/arch/alpha/sys/sigsuspend.S
+++ b/lib/libc/arch/alpha/sys/sigsuspend.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigsuspend.S,v 1.6 2005/08/07 16:40:13 espie Exp $	*/
+/*	$OpenBSD: sigsuspend.S,v 1.7 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: sigsuspend.S,v 1.2 1996/10/17 03:08:22 cgd Exp $	*/
 
 /*
@@ -35,4 +35,4 @@ SYSLEAF(sigsuspend, 1)
 	CALLSYS_ERROR(sigsuspend)
 	mov	zero, v0		/* shouldn't need; just in case... */
 	RET
-SYSEND(sigsuspend)
+SYSCALL_END(sigsuspend)
diff --git a/lib/libc/arch/amd64/SYS.h b/lib/libc/arch/amd64/SYS.h
index 9c13df11199..e9b6be457eb 100644
--- a/lib/libc/arch/amd64/SYS.h
+++ b/lib/libc/arch/amd64/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.16 2015/10/17 22:40:54 guenther Exp $	*/
+/*	$OpenBSD: SYS.h,v 1.17 2015/10/23 04:39:24 guenther Exp $	*/
 
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -114,6 +114,8 @@
 #define SYSCALL_NOERROR(x)						\
 	_SYSCALL_NOERROR(x,x)
 
+#define SYSCALL_HIDDEN(x)						\
+	_SYSCALL_HIDDEN(x,x)
 #define SYSCALL(x)							\
 	_SYSCALL(x,x)
 
diff --git a/lib/libc/arch/amd64/sys/sigprocmask.S b/lib/libc/arch/amd64/sys/sigprocmask.S
index c3c3acc3fd0..065088d6548 100644
--- a/lib/libc/arch/amd64/sys/sigprocmask.S
+++ b/lib/libc/arch/amd64/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.7 2015/10/17 22:40:54 guenther Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.8 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: sigprocmask.S,v 1.1 2001/06/19 00:25:06 fvdl Exp $	*/
 
 /*-
@@ -39,7 +39,7 @@
 
 #include "SYS.h"
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	testq	%rsi,%rsi		# check new sigset pointer
 	jnz	1f			# if not null, indirect
 	movl	$1,%edi			# SIG_BLOCK
@@ -60,4 +60,4 @@ out:
 #else
 	jmp	CERROR
 #endif
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/arm/SYS.h b/lib/libc/arch/arm/SYS.h
index 94824881eb2..9812bb3ebc6 100644
--- a/lib/libc/arch/arm/SYS.h
+++ b/lib/libc/arch/arm/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.13 2015/09/10 13:29:09 guenther Exp $	*/
+/*	$OpenBSD: SYS.h,v 1.14 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: SYS.h,v 1.8 2003/08/07 16:42:02 agc Exp $	*/
 
 /*-
@@ -127,5 +127,7 @@
 	PSEUDO_HIDDEN(x,x)
 #define SYSCALL_END(x)							\
 	__END(x)
+#define SYSCALL_END_HIDDEN(x)						\
+	__END_HIDDEN(x)
 
 	.globl	CERROR
diff --git a/lib/libc/arch/arm/sys/sigprocmask.S b/lib/libc/arch/arm/sys/sigprocmask.S
index aab0d86434c..b0ca0387990 100644
--- a/lib/libc/arch/arm/sys/sigprocmask.S
+++ b/lib/libc/arch/arm/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.3 2015/09/10 13:29:09 guenther Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.4 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: sigprocmask.S,v 1.5 2003/08/07 16:42:05 agc Exp $	*/
 
 /*-
@@ -34,7 +34,7 @@
 
 #include "SYS.h"
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	teq	r1, #0x00000000
 	moveq	r0, #0x00000001
 	moveq	r1, #0x00000000
@@ -45,4 +45,4 @@ SYSENTRY(sigprocmask)
 	strne	r0, [r2]
 	mov	r0, #0x00000000
 	mov	r15, r14
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/hppa/sys/sigprocmask.S b/lib/libc/arch/hppa/sys/sigprocmask.S
index e463e827bb0..f173e24340c 100644
--- a/lib/libc/arch/hppa/sys/sigprocmask.S
+++ b/lib/libc/arch/hppa/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.13 2006/01/05 22:13:55 kettenis Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.14 2015/10/23 04:39:24 guenther Exp $	*/
 
 /*
  * Copyright (c) 1999 Michael Shalayeff
@@ -28,7 +28,7 @@
 
 #include "SYS.h"
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	/* just in case compiler forgot about this */
 	stw	arg2, HPPA_FRAME_ARG(2)(sp)
 
@@ -49,6 +49,6 @@ sigprocmask$call
 	stw	ret0, 0(arg2)
 	bv	r0(rp)
 	copy	r0, ret0
-SYSEXIT(sigprocmask)
+SYSEXIT_HIDDEN(sigprocmask)
 
 	.end
diff --git a/lib/libc/arch/hppa64/sys/sigprocmask.S b/lib/libc/arch/hppa64/sys/sigprocmask.S
index e68ff9d0629..eff082a7810 100644
--- a/lib/libc/arch/hppa64/sys/sigprocmask.S
+++ b/lib/libc/arch/hppa64/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.5 2011/08/16 18:58:45 kettenis Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.6 2015/10/23 04:39:24 guenther Exp $	*/
 
 /*
  * Copyright (c) 1999 Michael Shalayeff
@@ -28,7 +28,7 @@
 
 #include "SYS.h"
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	std	%arg2, HPPA_FRAME_ARG(2)(%sp)
 
 	comb,<>,n %r0, %arg1, sigprocmask$nblock
@@ -47,6 +47,6 @@ sigprocmask$call
 	stw	%ret0, 0(%arg2)
 	bv	%r0(%rp)
 	copy	%r0, %ret0
-SYSEXIT(sigprocmask)
+SYSEXIT_HIDDEN(sigprocmask)
 
 	.end
diff --git a/lib/libc/arch/i386/SYS.h b/lib/libc/arch/i386/SYS.h
index 2cb60bc11ac..7373a9796a9 100644
--- a/lib/libc/arch/i386/SYS.h
+++ b/lib/libc/arch/i386/SYS.h
@@ -29,7 +29,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$OpenBSD: SYS.h,v 1.23 2015/09/05 06:22:47 guenther Exp $
+ *	$OpenBSD: SYS.h,v 1.24 2015/10/23 04:39:24 guenther Exp $
  */
 
 #include <machine/asm.h>
@@ -160,5 +160,7 @@
 #define	RSYSCALL_HIDDEN(x)				\
 			PSEUDO_HIDDEN(x,x)
 #define	SYSCALL_END(x)	__END(x)
+#define	SYSCALL_END_HIDDEN(x)				\
+			__END_HIDDEN(x)
 
 	.globl	CERROR
diff --git a/lib/libc/arch/i386/sys/sigprocmask.S b/lib/libc/arch/i386/sys/sigprocmask.S
index 1c47261a171..2f7b31e2de9 100644
--- a/lib/libc/arch/i386/sys/sigprocmask.S
+++ b/lib/libc/arch/i386/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.10 2015/09/05 06:22:47 guenther Exp $ */
+/*	$OpenBSD: sigprocmask.S,v 1.11 2015/10/23 04:39:24 guenther Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -33,7 +33,7 @@
 
 #include "SYS.h"
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	movl	8(%esp),%ecx		# fetch new sigset pointer
 	testl	%ecx,%ecx		# check new sigset pointer
 	jnz	1f			# if not null, indirect
@@ -62,4 +62,4 @@ out:
 #else
 	jmp	CERROR
 #endif
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/m88k/SYS.h b/lib/libc/arch/m88k/SYS.h
index 5cf59fa3021..7e6f399ff87 100644
--- a/lib/libc/arch/m88k/SYS.h
+++ b/lib/libc/arch/m88k/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.21 2015/09/10 13:29:09 guenther Exp $*/
+/*	$OpenBSD: SYS.h,v 1.22 2015/10/23 04:39:24 guenther Exp $*/
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -143,9 +143,11 @@
 #define	RSYSCALL_HIDDEN(x)	__PSEUDO_HIDDEN(_thread_sys_,x,x)
 #define	PSEUDO(x,y)		__PSEUDO(_thread_sys_,x,y)
 #define	PSEUDO_NOERROR(x,y)	__PSEUDO_NOERROR(_thread_sys_,x,y)
-#define	SYSENTRY(x)		__ENTRY(_thread_sys_,x);		\
+#define	SYSENTRY_HIDDEN(x)	__ENTRY(_thread_sys_,x)
+#define	SYSENTRY(x)		SYSENTRY_HIDDEN(x);		\
 				__ALIAS(_thread_sys_,x)
-#define	SYSCALL_END(x)		__END(_thread_sys_,x); END(x)
+#define	SYSCALL_END_HIDDEN(x)	__END(_thread_sys_,x)
+#define	SYSCALL_END(x)		SYSCALL_END_HIDDEN(x); END(x)
 
 #define	ASMSTR		.asciz
 
diff --git a/lib/libc/arch/m88k/sys/sigprocmask.S b/lib/libc/arch/m88k/sys/sigprocmask.S
index b7a8e32ba3f..5ce01f22762 100644
--- a/lib/libc/arch/m88k/sys/sigprocmask.S
+++ b/lib/libc/arch/m88k/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.11 2015/09/10 13:29:09 guenther Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.12 2015/10/23 04:39:24 guenther Exp $	*/
 
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -35,7 +35,7 @@
 
 #include "SYS.h"
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	bcnd	ne0,%r3,1f		/* if new sigset pointer is null */
 	or	%r2,%r0,1		/* how = SIG_BLOCK and do it */
 	br	2f
@@ -50,4 +50,4 @@ SYSENTRY(sigprocmask)
 3:
 	jmp.n	%r1
 	 or	%r2,%r0,0
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/mips64/SYS.h b/lib/libc/arch/mips64/SYS.h
index 49b2269c97c..bc4bcfa9f45 100644
--- a/lib/libc/arch/mips64/SYS.h
+++ b/lib/libc/arch/mips64/SYS.h
@@ -29,7 +29,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *      $OpenBSD: SYS.h,v 1.10 2015/09/05 17:32:18 miod Exp $ 
+ *      $OpenBSD: SYS.h,v 1.11 2015/10/23 04:39:24 guenther Exp $ 
  */
 
 #include <sys/syscall.h>
@@ -78,8 +78,6 @@
 # define __END2(p,x)		__END2_HIDDEN(p,x);	\
 				.size x, . - x
 
-# define __CLABEL2(p,x)		_C_LABEL(p ## x)
-
 #define __PSEUDO_NOERROR(p,x,y)				\
 		__LEAF2(p,x, 0);			\
 			__DO_SYSCALL(y);		\
@@ -89,7 +87,7 @@
 #define __PSEUDO(p,x,y)   				\
 		__LEAF2(p,x,32);			\
 			PTR_SUBU sp,32;			\
-			SETUP_GP64(16,__CLABEL2(p,x));	\
+			SETUP_GP64(16,_HIDDEN(x));	\
 			__DO_SYSCALL(y);		\
 			bne	a3,zero,1f;		\
 			RESTORE_GP64;			\
@@ -103,7 +101,7 @@
 #define __PSEUDO_HIDDEN(p,x,y)   			\
 		LEAF(p ## x,32);			\
 			PTR_SUBU sp,32;			\
-			SETUP_GP64(16,__CLABEL2(p,x));	\
+			SETUP_GP64(16,_HIDDEN(x));	\
 			__DO_SYSCALL(y);		\
 			bne	a3,zero,1f;		\
 			RESTORE_GP64;			\
@@ -122,5 +120,7 @@
 #define PSEUDO_NOERROR(x,y)	__PSEUDO_NOERROR(_thread_sys_,x,y)
 
 #define	SYSLEAF(x, sz)		__LEAF2(_thread_sys_,x, sz)
-#define	SYSEND(x)		__END2(_thread_sys_,x)
+#define	SYSLEAF_HIDDEN(x, sz)	LEAF(_thread_sys_ ## x, sz)
+#define	SYSCALL_END(x)		__END2(_thread_sys_,x)
+#define	SYSCALL_END_HIDDEN(x)	__END2_HIDDEN(_thread_sys_,x)
 
diff --git a/lib/libc/arch/mips64/sys/sigpending.S b/lib/libc/arch/mips64/sys/sigpending.S
index 7d55fdcb507..f1217070fdd 100644
--- a/lib/libc/arch/mips64/sys/sigpending.S
+++ b/lib/libc/arch/mips64/sys/sigpending.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigpending.S,v 1.6 2015/10/04 06:34:35 guenther Exp $ */
+/*	$OpenBSD: sigpending.S,v 1.7 2015/10/23 04:39:24 guenther Exp $ */
 /*-
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -38,7 +38,7 @@ GPOFF= FRAMESZ-2*REGSZ
 
 SYSLEAF(sigpending, FRAMESZ)
 	PTR_SUBU sp, FRAMESZ
-	SETUP_GP64(GPOFF, sigpending)
+	SETUP_GP64(GPOFF, _HIDDEN(sigpending))
 	.set	reorder
 	li	v0, SYS_sigpending
 	syscall
@@ -53,4 +53,4 @@ SYSLEAF(sigpending, FRAMESZ)
 	RESTORE_GP64
 	PTR_ADDU sp, FRAMESZ
 	jr	t9
-SYSEND(sigpending)
+SYSCALL_END(sigpending)
diff --git a/lib/libc/arch/mips64/sys/sigprocmask.S b/lib/libc/arch/mips64/sys/sigprocmask.S
index d307ca62b1f..5b079a8a8ea 100644
--- a/lib/libc/arch/mips64/sys/sigprocmask.S
+++ b/lib/libc/arch/mips64/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.6 2015/09/05 06:22:47 guenther Exp $ */
+/*	$OpenBSD: sigprocmask.S,v 1.7 2015/10/23 04:39:24 guenther Exp $ */
 /*-
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -36,9 +36,9 @@
 FRAMESZ= MKFSIZ(1,1)
 GPOFF= FRAMESZ-2*REGSZ
 
-SYSLEAF(sigprocmask, FRAMESZ)
+SYSLEAF_HIDDEN(sigprocmask, FRAMESZ)
 	PTR_SUBU sp, FRAMESZ
-	SETUP_GP64(GPOFF, sigprocmask)
+	SETUP_GP64(GPOFF, _HIDDEN(sigprocmask))
 	.set	reorder
 	bne	a1, zero, .Lgotptr	# if new sigset pointer not null
 	li	a0, 1			# how = SIG_BLOCK
@@ -61,4 +61,4 @@ SYSLEAF(sigprocmask, FRAMESZ)
 	RESTORE_GP64
 	PTR_ADDU sp, FRAMESZ
 	jr	t9
-SYSEND(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/mips64/sys/sigsuspend.S b/lib/libc/arch/mips64/sys/sigsuspend.S
index d9801b2f2be..8fec33adb6e 100644
--- a/lib/libc/arch/mips64/sys/sigsuspend.S
+++ b/lib/libc/arch/mips64/sys/sigsuspend.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigsuspend.S,v 1.5 2011/04/04 12:42:39 guenther Exp $ */
+/*	$OpenBSD: sigsuspend.S,v 1.6 2015/10/23 04:39:24 guenther Exp $ */
 /*-
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -38,7 +38,7 @@ GPOFF= FRAMESZ-2*REGSZ
 
 SYSLEAF(sigsuspend, FRAMESZ)
 	PTR_SUBU sp, FRAMESZ
-	SETUP_GP64(GPOFF, sigsuspend)
+	SETUP_GP64(GPOFF, _HIDDEN(sigsuspend))
 	.set	reorder
 	lw	a0, 0(a0)		# indirect to mask arg
 	li	v0, SYS_sigsuspend
@@ -53,4 +53,4 @@ SYSLEAF(sigsuspend, FRAMESZ)
 	RESTORE_GP64
 	PTR_ADDU sp, FRAMESZ
 	jr	t9
-SYSEND(sigsuspend)
+SYSCALL_END(sigsuspend)
diff --git a/lib/libc/arch/powerpc/SYS.h b/lib/libc/arch/powerpc/SYS.h
index 837258efaa4..61036697b71 100644
--- a/lib/libc/arch/powerpc/SYS.h
+++ b/lib/libc/arch/powerpc/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.19 2015/09/05 06:22:47 guenther Exp $	*/
+/*	$OpenBSD: SYS.h,v 1.20 2015/10/23 04:39:24 guenther Exp $	*/
 /*-
  * Copyright (c) 1994
  *	Andrew Cagney.  All rights reserved.
@@ -86,10 +86,9 @@
 
 #define ALIAS(x,y)		WEAK_ALIAS(y,_CONCAT(x,y));
 		
+#define PREFIX_HIDDEN(x)	PSEUDO_PREFIX(_thread_sys_,x,x)
 #define PREFIX(x)		ALIAS(_thread_sys_,x) \
-				PSEUDO_PREFIX(_thread_sys_,x,x)
-#define PREFIX2(x,y)		ALIAS(_thread_sys_,x) \
-				PSEUDO_PREFIX(_thread_sys_,x,y)
+				PREFIX_HIDDEN(x)
 #define	PSEUDO_NOERROR(x,y)	ALIAS(_thread_sys_,x) \
 				PSEUDO_PREFIX(_thread_sys_,x,y) ; \
 				sc ; \
@@ -106,5 +105,6 @@
 
 #define RSYSCALL(x)		PSEUDO(x,x)
 #define RSYSCALL_HIDDEN(x)	PSEUDO_HIDDEN(x,x)
+#define SYSCALL_END_HIDDEN(x)	__END_HIDDEN(_thread_sys_,x)
 #define SYSCALL_END(x)		__END(_thread_sys_,x)
 
diff --git a/lib/libc/arch/powerpc/sys/sigprocmask.S b/lib/libc/arch/powerpc/sys/sigprocmask.S
index 5ec4fc00d1c..2d43827bb82 100644
--- a/lib/libc/arch/powerpc/sys/sigprocmask.S
+++ b/lib/libc/arch/powerpc/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/* $OpenBSD: sigprocmask.S,v 1.9 2015/09/05 06:22:47 guenther Exp $ */
+/* $OpenBSD: sigprocmask.S,v 1.10 2015/10/23 04:39:24 guenther Exp $ */
 
 /*
  * Copyright (c) 1996 Dale Rahn
@@ -30,7 +30,7 @@
 #include "SYS.h"
 
 	.text
-PREFIX(sigprocmask)
+PREFIX_HIDDEN(sigprocmask)
 	stwu	1, -16(1)
 	stw	5, 12(1)
 	
@@ -60,4 +60,4 @@ PREFIX(sigprocmask)
 	li	3, 0
 	addi	1, 1, 16
 	blr
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/sh/SYS.h b/lib/libc/arch/sh/SYS.h
index ea6ad7b7b01..c3b95350399 100644
--- a/lib/libc/arch/sh/SYS.h
+++ b/lib/libc/arch/sh/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.8 2015/09/10 13:29:09 guenther Exp $	*/
+/*	$OpenBSD: SYS.h,v 1.9 2015/10/23 04:39:24 guenther Exp $	*/
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -159,5 +159,6 @@
 #define RSYSCALL(x)			PSEUDO(x,x)
 #define RSYSCALL_HIDDEN(x)		PSEUDO_HIDDEN(x,x)
 #define SYSCALL_END(x)			__END(x)
+#define SYSCALL_END_HIDDEN(x)		__END_HIDDEN(x)
 
 	.globl	CERROR
diff --git a/lib/libc/arch/sh/sys/sigprocmask.S b/lib/libc/arch/sh/sys/sigprocmask.S
index 381050fd82d..f4d807a87ee 100644
--- a/lib/libc/arch/sh/sys/sigprocmask.S
+++ b/lib/libc/arch/sh/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.2 2015/09/10 13:29:09 guenther Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.3 2015/10/23 04:39:24 guenther Exp $	*/
 /*	$NetBSD: sigprocmask.S,v 1.6 2003/08/07 16:42:21 agc Exp $	*/
 
 /*-
@@ -37,7 +37,7 @@
 
 #include "SYS.h"
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	mov	r5, r2			/* fetch new sigset pointer */
 	tst	r2, r2			/* check new sigset pointer */
 	bf	1f			/* if not null, indirect */
@@ -63,4 +63,4 @@ SYSENTRY(sigprocmask)
 	.align	2
 LSYS_sigprocmask:
 	.long	SYS_sigprocmask
-SYSCALL_END(sigpending)
+SYSCALL_END_HIDDEN(sigpending)
diff --git a/lib/libc/arch/sparc/SYS.h b/lib/libc/arch/sparc/SYS.h
index 68227774a9f..1e22754c186 100644
--- a/lib/libc/arch/sparc/SYS.h
+++ b/lib/libc/arch/sparc/SYS.h
@@ -30,7 +30,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$OpenBSD: SYS.h,v 1.19 2015/09/10 13:29:09 guenther Exp $
+ *	$OpenBSD: SYS.h,v 1.20 2015/10/23 04:39:25 guenther Exp $
  */
 
 #include "DEFS.h"
@@ -109,6 +109,8 @@
 # define PSEUDO(x,y)		__PSEUDO(_thread_sys_,x,y)
 # define PSEUDO_NOERROR(x,y)	__PSEUDO_NOERROR(_thread_sys_,x,y)
 # define SYSENTRY(x)		__ENTRY(_thread_sys_,x)
+# define SYSENTRY_HIDDEN(x)	__ENTRY_HIDDEN(_thread_sys_,x)
 # define SYSCALL_END(x)		__END(_thread_sys_,x)
+# define SYSCALL_END_HIDDEN(x)	__END_HIDDEN(_thread_sys_,x)
 
 	.globl	_C_LABEL(__cerror)
diff --git a/lib/libc/arch/sparc/sys/sigprocmask.S b/lib/libc/arch/sparc/sys/sigprocmask.S
index 5e0e9233b52..7122af5f842 100644
--- a/lib/libc/arch/sparc/sys/sigprocmask.S
+++ b/lib/libc/arch/sparc/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.6 2015/09/10 13:29:09 guenther Exp $ */
+/*	$OpenBSD: sigprocmask.S,v 1.7 2015/10/23 04:39:25 guenther Exp $ */
 /*
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -37,7 +37,7 @@
 /*
  * sigprocmask(int how, sigset_t *set, sigset_t *oset)
  */
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	tst	%o1		! set == NULL?
 	bne,a	1f		! if not,
 	 ld	[%o1], %o1	!    replace it in %o1 with *set
@@ -55,4 +55,4 @@ SYSENTRY(sigprocmask)
 3:
 	retl			! in any case, return 0
 	 clr	%o0
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/sparc64/SYS.h b/lib/libc/arch/sparc64/SYS.h
index 30cb179ce19..85c48829f8c 100644
--- a/lib/libc/arch/sparc64/SYS.h
+++ b/lib/libc/arch/sparc64/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.14 2015/09/05 06:22:47 guenther Exp $	*/
+/*	$OpenBSD: SYS.h,v 1.15 2015/10/23 04:39:25 guenther Exp $	*/
 /*-
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -160,13 +160,13 @@
 /*
  * SYSENTRY is for functions that pretend to be syscalls.
  */
-#define __SYSENTRY(p,x) __ENTRY(p,x)
-
 #define	SYSCALL(x)		__SYSCALL(_thread_sys_,x)
 #define	RSYSCALL(x)		__RSYSCALL(_thread_sys_,x)
 #define	RSYSCALL_HIDDEN(x)	__RSYSCALL_HIDDEN(_thread_sys_,x)
 #define	RSYSCALL_NOERROR(x,y)	__RSYSCALL_NOERROR(_thread_sys_,x,y)
 #define	PSEUDO(x,y)		__PSEUDO(_thread_sys_,x,y)
 #define	PSEUDO_NOERROR(x,y)	__PSEUDO_NOERROR(_thread_sys_,x,y)
-#define	SYSENTRY(x)		__SYSENTRY(_thread_sys_,x)
+#define	SYSENTRY(x)		__ENTRY(_thread_sys_,x)
+#define	SYSENTRY_HIDDEN(x)	__ENTRY_HIDDEN(_thread_sys_,x)
 #define	SYSCALL_END(x)		__END(_thread_sys_,x)
+#define	SYSCALL_END_HIDDEN(x)	__END_HIDDEN(_thread_sys_,x)
diff --git a/lib/libc/arch/sparc64/sys/sigprocmask.S b/lib/libc/arch/sparc64/sys/sigprocmask.S
index e59f98fd72d..3d3fa865c0f 100644
--- a/lib/libc/arch/sparc64/sys/sigprocmask.S
+++ b/lib/libc/arch/sparc64/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.3 2015/09/05 06:22:47 guenther Exp $	*/
+/*	$OpenBSD: sigprocmask.S,v 1.4 2015/10/23 04:39:25 guenther Exp $	*/
 /*
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -39,7 +39,7 @@
 /*
  * sigprocmask(int how, sigset_t *set, sigset_t *oset)
  */
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	brnz,a	%o1, 1f		/* if (set != NULL) */
 	 ld	[%o1], %o1	/*    replace it in %o1 with *set */
 /*	clr	%o1		 * else block no signals ... */
@@ -56,4 +56,4 @@ SYSENTRY(sigprocmask)
 3:
 	retl			/* in any case, return 0 */
 	 clr	%o0
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/arch/vax/SYS.h b/lib/libc/arch/vax/SYS.h
index 763345190d6..036ee5a4090 100644
--- a/lib/libc/arch/vax/SYS.h
+++ b/lib/libc/arch/vax/SYS.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: SYS.h,v 1.19 2015/09/10 13:29:09 guenther Exp $ */
+/*	$OpenBSD: SYS.h,v 1.20 2015/10/23 04:39:25 guenther Exp $ */
 /*	$NetBSD: SYS.h,v 1.4 1997/05/02 18:15:32 kleink Exp $ */
 
 /*
@@ -68,7 +68,8 @@
  */
 #define	SYSCALL(x)		__ALIAS(_thread_sys_,x)		\
 				__SYSCALL(_thread_sys_,x,x)
-#define	SYSCALL_END(x)		__END(_thread_sys_,x); END(x)
+#define	SYSCALL_END_HIDDEN(x)	__END(_thread_sys_,x)
+#define	SYSCALL_END(x)		SYSCALL_END_HIDDEN(x); END(x)
 #define	RSYSCALL(x)		__ALIAS(_thread_sys_,x)		\
 				__PSEUDO(_thread_sys_,x,x);	\
 				END(x)
@@ -79,8 +80,9 @@
 #define	PSEUDO_NOERROR(x,y)	__ALIAS(_thread_sys_,x)		\
 				__PSEUDO_NOERROR(_thread_sys_,x,y); \
 				END(x)
+#define	SYSENTRY_HIDDEN(x)	__ENTRY(_thread_sys_,x)
 #define	SYSENTRY(x)		__ALIAS(_thread_sys_,x)		\
-				__ENTRY(_thread_sys_,x)
+				SYSENTRY_HIDDEN(x)
 #define	SYSNAME(x)		_CAT(__thread_sys_,x)
 
 	.globl	_C_LABEL(__cerror)
diff --git a/lib/libc/arch/vax/sys/sigprocmask.S b/lib/libc/arch/vax/sys/sigprocmask.S
index be39d69a021..3771cd02b4e 100644
--- a/lib/libc/arch/vax/sys/sigprocmask.S
+++ b/lib/libc/arch/vax/sys/sigprocmask.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigprocmask.S,v 1.10 2015/09/10 13:29:09 guenther Exp $ */
+/*	$OpenBSD: sigprocmask.S,v 1.11 2015/10/23 04:39:25 guenther Exp $ */
 /*
  * Copyright (c) 1989, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -31,7 +31,7 @@
 #include "SYS.h"
 
 
-SYSENTRY(sigprocmask)
+SYSENTRY_HIDDEN(sigprocmask)
 	tstl	8(%ap)			# check new sigset pointer
 	bneq	1f			# if not null, indirect
 /*	movl	$0,8(%ap)		# null mask pointer: block empty set */
@@ -48,4 +48,4 @@ SYSENTRY(sigprocmask)
 	ret
 4:
 	jmp	_C_LABEL(__cerror)
-SYSCALL_END(sigprocmask)
+SYSCALL_END_HIDDEN(sigprocmask)
diff --git a/lib/libc/compat-43/sigcompat.c b/lib/libc/compat-43/sigcompat.c
index 4e82ef5bd35..c4f2407d22b 100644
--- a/lib/libc/compat-43/sigcompat.c
+++ b/lib/libc/compat-43/sigcompat.c
@@ -39,7 +39,7 @@ sigvec(int signo, struct sigvec *sv, struct sigvec *osv)
 		nsv = *sv;
 		nsv.sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
 	}
-	ret = sigaction(signo, sv ? (struct sigaction *)&nsv : NULL,
+	ret = WRAP(sigaction)(signo, sv ? (struct sigaction *)&nsv : NULL,
 	    (struct sigaction *)osv);
 	if (ret == 0 && osv)
 		osv->sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
@@ -51,7 +51,8 @@ sigsetmask(int mask)
 {
 	int omask, n;
 
-	n = sigprocmask(SIG_SETMASK, (sigset_t *) &mask, (sigset_t *) &omask);
+	n = WRAP(sigprocmask)(SIG_SETMASK, (sigset_t *) &mask,
+	    (sigset_t *) &omask);
 	if (n)
 		return (n);
 	return (omask);
@@ -63,7 +64,8 @@ sigblock(int mask)
 {
 	int omask, n;
 
-	n = sigprocmask(SIG_BLOCK, (sigset_t *) &mask, (sigset_t *) &omask);
+	n = WRAP(sigprocmask)(SIG_BLOCK, (sigset_t *) &mask,
+	    (sigset_t *) &omask);
 	if (n)
 		return (n);
 	return (omask);
diff --git a/lib/libc/gen/posix_spawn.c b/lib/libc/gen/posix_spawn.c
index dd175e6582f..27e6d741069 100644
--- a/lib/libc/gen/posix_spawn.c
+++ b/lib/libc/gen/posix_spawn.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: posix_spawn.c,v 1.7 2015/09/10 18:13:46 guenther Exp $	*/
+/*	$OpenBSD: posix_spawn.c,v 1.8 2015/10/23 04:39:24 guenther Exp $	*/
 /*-
  * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
  * All rights reserved.
@@ -119,12 +119,13 @@ process_spawnattr(const posix_spawnattr_t sa)
 
 	/* Set signal masks/defaults */
 	if (sa->sa_flags & POSIX_SPAWN_SETSIGMASK) {
-		sigprocmask(SIG_SETMASK, &sa->sa_sigmask, NULL);
+		WRAP(sigprocmask)(SIG_SETMASK, &sa->sa_sigmask, NULL);
 	}
 
 	if (sa->sa_flags & POSIX_SPAWN_SETSIGDEF) {
 		for (i = 1; i < _NSIG; i++) {
-			if (sigismember(&sa->sa_sigdefault, i))
+			/* silently ignore attempts to alter SIGTHR */
+			if (sigismember(&sa->sa_sigdefault, i) && i != SIGTHR)
 				if (sigaction(i, &sigact, NULL) != 0)
 					return (errno);
 		}
diff --git a/lib/libc/gen/siginterrupt.c b/lib/libc/gen/siginterrupt.c
index ed23687b697..b6725a6d7b6 100644
--- a/lib/libc/gen/siginterrupt.c
+++ b/lib/libc/gen/siginterrupt.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: siginterrupt.c,v 1.7 2015/09/09 16:10:03 guenther Exp $ */
+/*	$OpenBSD: siginterrupt.c,v 1.8 2015/10/23 04:39:24 guenther Exp $ */
 /*
  * Copyright (c) 1989, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -40,7 +40,7 @@ siginterrupt(int sig, int flag)
 	struct sigaction sa;
 	int ret;
 
-	if ((ret = sigaction(sig, (struct sigaction *)0, &sa)) < 0)
+	if ((ret = WRAP(sigaction)(sig, NULL, &sa)) < 0)
 		return (ret);
 	if (flag) {
 		sigaddset(&__sigintr, sig);
@@ -49,5 +49,5 @@ siginterrupt(int sig, int flag)
 		sigdelset(&__sigintr, sig);
 		sa.sa_flags |= SA_RESTART;
 	}
-	return (sigaction(sig, &sa, (struct sigaction *)0));
+	return (sigaction(sig, &sa, NULL));
 }
diff --git a/lib/libc/gen/signal.c b/lib/libc/gen/signal.c
index 03a6fa3d5a2..0ca411bca64 100644
--- a/lib/libc/gen/signal.c
+++ b/lib/libc/gen/signal.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: signal.c,v 1.8 2015/09/09 16:10:03 guenther Exp $ */
+/*	$OpenBSD: signal.c,v 1.9 2015/10/23 04:39:24 guenther Exp $ */
 /*
  * Copyright (c) 1985, 1989, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -47,7 +47,7 @@ signal(int s, sig_t a)
 	sa.sa_flags = 0;
 	if (!sigismember(&__sigintr, s))
 		sa.sa_flags |= SA_RESTART;
-	if (sigaction(s, &sa, &osa) < 0)
+	if (WRAP(sigaction)(s, &sa, &osa) < 0)
 		return (SIG_ERR);
 	return (osa.sa_handler);
 }
diff --git a/lib/libc/hidden/signal.h b/lib/libc/hidden/signal.h
index 53b4998f9d9..10bb3e41884 100644
--- a/lib/libc/hidden/signal.h
+++ b/lib/libc/hidden/signal.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: signal.h,v 1.7 2015/09/19 04:02:21 guenther Exp $	*/
+/*	$OpenBSD: signal.h,v 1.8 2015/10/23 04:39:24 guenther Exp $	*/
 /*
  * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
  *
@@ -33,9 +33,9 @@ PROTO_DEPRECATED(bsd_signal);
 PROTO_NORMAL(kill);             /* wrap to ban SIGTHR? */
 PROTO_DEPRECATED(killpg);
 PROTO_DEPRECATED(psignal);
-/*PROTO_NORMAL(pthread_sigmask);*/
+PROTO_DEPRECATED(pthread_sigmask);
 PROTO_NORMAL(raise);
-/*PROTO_WRAP(sigaction);	wrap to hide SIGTHR */
+PROTO_WRAP(sigaction);
 PROTO_NORMAL(sigaddset);
 PROTO_NORMAL(sigaltstack);
 PROTO_NORMAL(sigblock);
@@ -46,8 +46,8 @@ PROTO_DEPRECATED(siginterrupt);
 PROTO_NORMAL(sigismember);
 PROTO_NORMAL(signal);
 PROTO_DEPRECATED(sigpause);
-/*PROTO_NORMAL(sigpending);	wrap to hide SIGTHR */
-/*PROTO_WRAP(sigprocmask);	wrap to hide SIGTHR */
+PROTO_NORMAL(sigpending);
+PROTO_WRAP(sigprocmask);
 PROTO_NORMAL(sigreturn);
 PROTO_NORMAL(sigsetmask);
 /*PROTO_CANCEL(sigsuspend);	wrap to hide SIGTHR */
diff --git a/lib/libc/include/namespace.h b/lib/libc/include/namespace.h
index cfdb95ad023..569668d0acf 100644
--- a/lib/libc/include/namespace.h
+++ b/lib/libc/include/namespace.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: namespace.h,v 1.7 2015/09/11 09:18:27 guenther Exp $	*/
+/*	$OpenBSD: namespace.h,v 1.8 2015/10/23 04:39:24 guenther Exp $	*/
 
 #ifndef _LIBC_NAMESPACE_H_
 #define _LIBC_NAMESPACE_H_
@@ -69,7 +69,7 @@
  *
  *   WRAP(x)
  *	This expands to the internal, hidden name of a non-cancellation
- *	wrapper: _libc_x_wrap.  ex: WRAP(sigpending)(set)
+ *	wrapper: _libc_x_wrap.  ex: WRAP(sigprocmask)(set)
  *
  *
  * In order to actually set up the desired asm labels, we use these in
@@ -91,8 +91,9 @@
  *	ex: PROTO_CANCEL(wait4)
  *
  *   PROTO_WRAP(x)		Functions that have wrappers for other reasons
- *	This makes gcc convert use of x to use _libc_x_wrap instead.
- *	ex: PROTO_WRAP(setlogin)
+ *	Like PROTO_NORMAL(x), but also declares _libc_x_wrap.  Internal
+ *	calls that want the wrapper's processing should invoke WRAP(x)(...)
+ *	ex: PROTO_WRAP(sigaction)
  *
  *
  * Finally, to create the expected aliases, we use these in the .c files
@@ -144,7 +145,7 @@
 #define	PROTO_STD_DEPRECATED(x)	typeof(x) x __attribute__((deprecated))
 #define	PROTO_DEPRECATED(x)	typeof(x) x __attribute__((deprecated, weak))
 #define	PROTO_CANCEL(x)		PROTO_NORMAL(x), CANCEL(x)
-#define	PROTO_WRAP(x)		__dso_hidden typeof(x) x asm(WRAP_STRING(x))
+#define	PROTO_WRAP(x)		PROTO_NORMAL(x), WRAP(x)
 
 #define	DEF_STRONG(x)		__strong_alias(x, HIDDEN(x))
 #define	DEF_WEAK(x)		__weak_alias(x, HIDDEN(x))
diff --git a/lib/libc/stdlib/abort.c b/lib/libc/stdlib/abort.c
index 903bfa78e18..710cd7da478 100644
--- a/lib/libc/stdlib/abort.c
+++ b/lib/libc/stdlib/abort.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: abort.c,v 1.18 2015/09/13 08:31:47 guenther Exp $ */
+/*	$OpenBSD: abort.c,v 1.19 2015/10/23 04:39:24 guenther Exp $ */
 /*
  * Copyright (c) 1985 Regents of the University of California.
  * All rights reserved.
@@ -34,7 +34,6 @@
 #include "thread_private.h"
 #include "atexit.h"
 
-int	_thread_sys_sigprocmask(int, const sigset_t *, sigset_t *);
 
 void
 abort(void)
@@ -48,7 +47,7 @@ abort(void)
 	 * any errors -- X311J doesn't allow abort to return anyway.
 	 */
 	sigdelset(&mask, SIGABRT);
-	(void)_thread_sys_sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+	(void)sigprocmask(SIG_SETMASK, &mask, NULL);
 
 	(void)raise(SIGABRT);
 
@@ -57,7 +56,7 @@ abort(void)
 	 * it again, only harder.
 	 */
 	(void)signal(SIGABRT, SIG_DFL);
-	(void)_thread_sys_sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+	(void)sigprocmask(SIG_SETMASK, &mask, NULL);
 	(void)raise(SIGABRT);
 	_exit(1);
 }
diff --git a/lib/libc/sys/Makefile.inc b/lib/libc/sys/Makefile.inc
index 6a8dbaf7b3d..9fa5eb947d2 100644
--- a/lib/libc/sys/Makefile.inc
+++ b/lib/libc/sys/Makefile.inc
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile.inc,v 1.134 2015/10/23 00:52:49 deraadt Exp $
+#	$OpenBSD: Makefile.inc,v 1.135 2015/10/23 04:39:24 guenther Exp $
 #	$NetBSD: Makefile.inc,v 1.35 1995/10/16 23:49:07 jtc Exp $
 #	@(#)Makefile.inc	8.1 (Berkeley) 6/17/93
 
@@ -11,7 +11,8 @@ SRCS+=	Ovfork.S brk.S cerror.S fork.S \
 	sigsuspend.S syscall.S tfork_thread.S
 
 # glue to offer userland wrappers for some syscalls
-SRCS+=	posix_madvise.c w_fork.c
+SRCS+=	posix_madvise.c pthread_sigmask.c \
+	w_fork.c w_sigaction.c w_sigprocmask.c
 
 # glue to provide compatibility between GCC 1.X and 2.X and for compat
 # with old syscall interfaces.
@@ -54,7 +55,7 @@ ASM=	__get_tcb.o __getcwd.o __semctl.o __set_tcb.o __syscall.o \
 	setpgid.o setpriority.o setregid.o setresgid.o setresuid.o \
 	setreuid.o setrlimit.o setrtable.o setsid.o setsockopt.o \
 	settimeofday.o setuid.o shmat.o shmctl.o shmdt.o \
-	shmget.o shutdown.o sigaction.o sigaltstack.o socket.o \
+	shmget.o shutdown.o sigaltstack.o socket.o \
 	socketpair.o stat.o statfs.o swapctl.o symlink.o symlinkat.o \
 	sync.o sysarch.o sysctl.o umask.o unlink.o unlinkat.o \
 	unmount.o utimensat.o utimes.o utrace.o wait4.o write.o writev.o
@@ -81,7 +82,13 @@ PPSEUDO_NOERR=${PSEUDO_NOERR:.o=.po}
 SPSEUDO_NOERR=${PSEUDO_NOERR:.o=.so}
 DPSEUDO_NOERR=${PSEUDO_NOERR:.o=.do}
 
-OBJS+=	${ASM} ${PSEUDO} ${PSEUDO_NOERR}
+HIDDEN= sigaction.o
+GHIDDEN=${HIDDEN:.o=.go}
+PHIDDEN=${HIDDEN:.o=.po}
+SHIDDEN=${HIDDEN:.o=.so}
+DHIDDEN=${HIDDEN:.o=.do}
+
+OBJS+=	${ASM} ${PSEUDO} ${PSEUDO_NOERR} ${HIDDEN}
 
 SYS_DEP =  ${LIBCSRCDIR}/arch/${MACHINE_CPU}/SYS.h /usr/include/sys/syscall.h
 
@@ -100,6 +107,9 @@ GENERATE.pseudo=\
 GENERATE.pseudo_noerr=\
 	echo creating ${.TARGET} && \
 	printf '\#include "SYS.h"\nPSEUDO_NOERROR(${.PREFIX},${.PREFIX:S/_//})\n'
+GENERATE.rsyscall_hidden=\
+	echo creating ${.TARGET} && \
+	printf '\#include "SYS.h"\nRSYSCALL_HIDDEN(${.PREFIX:S/_//})\n'
 
 # ...and one of these to control how it's compiled
 FINISH=	${COMPILE.S} ${CFLAGS:M-[ID]*} ${AINC} -x assembler-with-cpp -
@@ -128,6 +138,12 @@ ${SPSEUDO_NOERR}: ${SYS_DEP} ; @${GENERATE.pseudo_noerr} | ${FINISH.so}
 ${DPSEUDO_NOERR}: ${SYS_DEP} ; @${GENERATE.pseudo_noerr} | ${FINISH.do}
 ${PSEUDO_NOERR}:  ${SYS_DEP} ; @${GENERATE.pseudo_noerr} | ${FINISH.o}
 
+${GHIDDEN}: ${SYS_DEP} ; @${GENERATE.rsyscall_hidden} | ${FINISH.go}
+${PHIDDEN}: ${SYS_DEP} ; @${GENERATE.rsyscall_hidden} | ${FINISH.po}
+${SHIDDEN}: ${SYS_DEP} ; @${GENERATE.rsyscall_hidden} | ${FINISH.so}
+${DHIDDEN}: ${SYS_DEP} ; @${GENERATE.rsyscall_hidden} | ${FINISH.do}
+${HIDDEN}:  ${SYS_DEP} ; @${GENERATE.rsyscall_hidden} | ${FINISH.o}
+
 
 MAN+=	__get_tcb.2 __thrsigdivert.2 __thrsleep.2 _exit.2 accept.2 \
 	access.2 acct.2 adjfreq.2 adjtime.2 bind.2 brk.2 chdir.2 \
diff --git a/lib/libc/sys/pthread_sigmask.c b/lib/libc/sys/pthread_sigmask.c
new file mode 100644
index 00000000000..19dfd56a253
--- /dev/null
+++ b/lib/libc/sys/pthread_sigmask.c
@@ -0,0 +1,26 @@
+/*	$OpenBSD: pthread_sigmask.c,v 1.1 2015/10/23 04:39:24 guenther Exp $ */
+/*
+ * Copyright (c) 2005 Ted Unangst <tedu@openbsd.org>
+ * All Rights Reserved.
+ *
+ * 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 <signal.h>
+#include <errno.h>
+
+int
+pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
+{
+	return (WRAP(sigprocmask)(how, set, oset) ? errno : 0);
+}
diff --git a/lib/libc/sys/w_sigaction.c b/lib/libc/sys/w_sigaction.c
new file mode 100644
index 00000000000..263365b8aa2
--- /dev/null
+++ b/lib/libc/sys/w_sigaction.c
@@ -0,0 +1,41 @@
+/*	$OpenBSD: w_sigaction.c,v 1.1 2015/10/23 04:39:24 guenther Exp $ */
+/*
+ * Copyright (c) 2005 Ted Unangst <tedu@openbsd.org>
+ * All Rights Reserved.
+ *
+ * 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.
+ */
+/*
+ * signals
+ */
+
+#include <signal.h>
+#include <errno.h>
+
+int
+WRAP(sigaction)(int sig, const struct sigaction *act, struct sigaction *oact)
+{
+	struct sigaction sa;
+
+	if (sig == SIGTHR) {
+		errno = EINVAL;
+		return (-1);
+	}
+	if (act != NULL && sigismember(&act->sa_mask, SIGTHR)) {
+		sa = *act;
+		sigdelset(&sa.sa_mask, SIGTHR);
+		act = &sa;
+	}
+	return (sigaction(sig, act, oact));
+}
+DEF_WRAP(sigaction);
diff --git a/lib/libc/sys/w_sigprocmask.c b/lib/libc/sys/w_sigprocmask.c
new file mode 100644
index 00000000000..1b4b843570e
--- /dev/null
+++ b/lib/libc/sys/w_sigprocmask.c
@@ -0,0 +1,37 @@
+/*	$OpenBSD: w_sigprocmask.c,v 1.1 2015/10/23 04:39:24 guenther Exp $ */
+/*
+ * Copyright (c) 2005 Ted Unangst <tedu@openbsd.org>
+ * All Rights Reserved.
+ *
+ * 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.
+ */
+/*
+ * signals
+ */
+
+#include <signal.h>
+#include <errno.h>
+
+int
+WRAP(sigprocmask)(int how, const sigset_t *set, sigset_t *oset)
+{
+	sigset_t s;
+
+	if (set != NULL && how != SIG_UNBLOCK && sigismember(set, SIGTHR)) {
+		s = *set;
+		sigdelset(&s, SIGTHR);
+		set = &s;
+	}
+	return (sigprocmask(how, set, oset));
+}
+DEF_WRAP(sigprocmask);
diff --git a/lib/librthread/rthread.c b/lib/librthread/rthread.c
index c0c692d021b..944e56f8bf6 100644
--- a/lib/librthread/rthread.c
+++ b/lib/librthread/rthread.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rthread.c,v 1.84 2015/10/18 08:02:58 guenther Exp $ */
+/*	$OpenBSD: rthread.c,v 1.85 2015/10/23 04:39:24 guenther Exp $ */
 /*
  * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
  * All Rights Reserved.
@@ -220,7 +220,7 @@ _rthread_init(void)
 	sa.sa_handler = sigthr_handler;
 	_thread_sys_sigaction(SIGTHR, &sa, NULL);
 	sigaddset(&sa.sa_mask, SIGTHR);
-	sigprocmask(SIG_UNBLOCK, &sa.sa_mask, NULL);
+	_thread_sys_sigprocmask(SIG_UNBLOCK, &sa.sa_mask, NULL);
 
 	return (0);
 }
@@ -757,8 +757,6 @@ static void *__libc_overrides[] __used = {
 	&select,
 	&sendmsg,
 	&sendto,
-	&sigaction,
-	&sigprocmask,
 	&sigsuspend,
 	&vfork,
 	&wait4,
diff --git a/lib/librthread/rthread_sig.c b/lib/librthread/rthread_sig.c
index 3c5ec8a59c1..3fbf9b4c200 100644
--- a/lib/librthread/rthread_sig.c
+++ b/lib/librthread/rthread_sig.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rthread_sig.c,v 1.16 2014/11/16 05:24:25 guenther Exp $ */
+/*	$OpenBSD: rthread_sig.c,v 1.17 2015/10/23 04:39:24 guenther Exp $ */
 /*
  * Copyright (c) 2005 Ted Unangst <tedu@openbsd.org>
  * All Rights Reserved.
@@ -27,25 +27,6 @@
 #include "rthread.h"
 
 int
-pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
-{
-	return (sigprocmask(how, set, oset) ? errno : 0);
-}
-
-int
-sigprocmask(int how, const sigset_t *set, sigset_t *oset)
-{
-	sigset_t s;
-
-	if (set != NULL && how != SIG_UNBLOCK && sigismember(set, SIGTHR)) {
-		s = *set;
-		sigdelset(&s, SIGTHR);
-		set = &s;
-	}
-	return (_thread_sys_sigprocmask(how, set, oset));
-}
-
-int
 sigwait(const sigset_t *set, int *sig)
 {
 	pthread_t self = pthread_self();
@@ -94,20 +75,3 @@ sigtimedwait(const sigset_t *set, siginfo_t *info,
 	return (ret);
 }
 #endif
-
-int
-sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
-{
-	struct sigaction sa;
-
-	if (sig == SIGTHR) {
-		errno = EINVAL;
-		return (-1);
-	}
-	if (act != NULL && sigismember(&act->sa_mask, SIGTHR)) {
-		sa = *act;
-		sigdelset(&sa.sa_mask, SIGTHR);
-		act = &sa;
-	}
-	return (_thread_sys_sigaction(sig, act, oact));
-}
diff --git a/lib/librthread/shlib_version b/lib/librthread/shlib_version
index 0aab0406bf8..a5757c1bcc6 100644
--- a/lib/librthread/shlib_version
+++ b/lib/librthread/shlib_version
@@ -1,2 +1,2 @@
-major=19
+major=20
 minor=0