PSARC 2009/595 delete ssig system call trap

6896743 The ancient SVR3 ssig() system call trap should be deleted

5 files changed, 6 insertions, 194 deletions

diff --git a/usr/src/uts/common/Makefile.files b/usr/src/uts/common/Makefile.files
index 3aa180f583..aa1b921b69 100644
--- a/usr/src/uts/common/Makefile.files
+++ b/usr/src/uts/common/Makefile.files
@@ -310,7 +310,6 @@ GENUNIX_OBJS +=	\
 		sock_conf.o	\
 		space.o		\
 		sscanf.o	\
-		ssig.o		\
 		stat.o		\
 		statfs.o	\
 		statvfs.o	\
diff --git a/usr/src/uts/common/os/sysent.c b/usr/src/uts/common/os/sysent.c
index e69eb3c1a8..c80048ade0 100644
--- a/usr/src/uts/common/os/sysent.c
+++ b/usr/src/uts/common/os/sysent.c
@@ -109,7 +109,6 @@ int	setpgrp();
 int	setuid();
 uintptr_t	shmsys();
 uint64_t	sidsys();
-int	ssig();
 int	sigprocmask();
 int	sigsuspend();
 int	sigaltstack();
@@ -486,7 +485,7 @@ struct sysent sysent[NSYSCALL] =
 	/* 45 */ SYSENT_LOADABLE(),			/* (was proc lock) */
 	/* 46 */ SYSENT_CI("setgid",		setgid,		1),
 	/* 47 */ SYSENT_2CI("getgid",		getgid,		0),
-	/* 48 */ SYSENT_CI("sig",		ssig,		2),
+	/* 48 */ SYSENT_LOADABLE(),			/* (was ssig) */
 	/* 49 */ SYSENT_LOADABLE(),			/* msgsys */
 	/* 50 */ IF_x86(
 			SYSENT_CI("sysi86",	sysi86,		4),
@@ -889,7 +888,7 @@ struct sysent sysent32[NSYSCALL] =
 	/* 45 */ SYSENT_LOADABLE32(),			/* (was proc lock) */
 	/* 46 */ SYSENT_CI("setgid",		setgid,		1),
 	/* 47 */ SYSENT_2CI("getgid",		getgid,		0),
-	/* 48 */ SYSENT_CI("sig",		ssig,		2),
+	/* 48 */ SYSENT_LOADABLE32(),			/* (was ssig) */
 	/* 49 */ SYSENT_LOADABLE32(),			/* msgsys */
 	/* 50 */ IF_386_ABI(
 			SYSENT_CI("sysi86",	sysi86,		4),
diff --git a/usr/src/uts/common/sys/iso/signal_iso.h b/usr/src/uts/common/sys/iso/signal_iso.h
index 7c499794fa..1222e85ea0 100644
--- a/usr/src/uts/common/sys/iso/signal_iso.h
+++ b/usr/src/uts/common/sys/iso/signal_iso.h
@@ -2,9 +2,8 @@
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
@@ -19,15 +18,15 @@
  *
  * CDDL HEADER END
  */
+
 /*
- * Copyright 1993-2003 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
 /*	  All Rights Reserved  	*/
 
-
 /*
  * An application should not include this header directly.  Instead it
  * should be included only through the inclusion of other Sun headers.
@@ -43,8 +42,6 @@
 #ifndef _SYS_SIGNAL_ISO_H
 #define	_SYS_SIGNAL_ISO_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI" /* SVr4.0 11.44 */
-
 #include <sys/unistd.h>		/* needed for _SC_SIGRT_MIN/MAX */
 
 #ifdef	__cplusplus
@@ -133,13 +130,6 @@ typedef	SIG_FUNC_TYP *SIG_TYP;
 #define	SIG_UNBLOCK	2
 #define	SIG_SETMASK	3
 
-#define	SIGNO_MASK	0xFF
-#define	SIGDEFER	0x100
-#define	SIGHOLD		0x200
-#define	SIGRELSE	0x400
-#define	SIGIGNORE	0x800
-#define	SIGPAUSE	0x1000
-
 #ifdef	__cplusplus
 }
 #endif
diff --git a/usr/src/uts/common/sys/syscall.h b/usr/src/uts/common/sys/syscall.h
index 7c75f50424..41a95c33d2 100644
--- a/usr/src/uts/common/sys/syscall.h
+++ b/usr/src/uts/common/sys/syscall.h
@@ -104,17 +104,6 @@ extern "C" {
 #define	SYS_plock	45
 #define	SYS_setgid	46
 #define	SYS_getgid	47
-#define	SYS_signal	48
-	/*
-	 * subcodes:
-	 *	signal(sig, f) :: signal(sig, f)    ((sig&SIGNO_MASK) == sig)
-	 *	sigset(sig, f) :: signal(sig|SIGDEFER, f)
-	 *	sighold(sig)   :: signal(sig|SIGHOLD)
-	 *	sigrelse(sig)  :: signal(sig|SIGRELSE)
-	 *	sigignore(sig) :: signal(sig|SIGIGNORE)
-	 *	sigpause(sig)  :: signal(sig|SIGPAUSE)
-	 *	see <sys/signal.h>
-	 */
 #define	SYS_msgsys	49
 	/*
 	 * subcodes:
diff --git a/usr/src/uts/common/syscall/ssig.c b/usr/src/uts/common/syscall/ssig.c
deleted file mode 100644
index 45e3953bb3..0000000000
--- a/usr/src/uts/common/syscall/ssig.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-
-/*
- * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
-/*	  All Rights Reserved	*/
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/sysmacros.h>
-#include <sys/systm.h>
-#include <sys/user.h>
-#include <sys/errno.h>
-#include <sys/proc.h>
-#include <sys/fault.h>
-#include <sys/procset.h>
-#include <sys/signal.h>
-#include <sys/schedctl.h>
-#include <sys/debug.h>
-
-
-/*
- * ssig() is the old common entry for signal, sigset, sighold,
- * sigrelse, sigignore and sigpause.
- *
- * All of these interfaces have been reimplemented in libc using
- * calls to sigaction, sigsuspend and sigprocmask.
- *
- * This kernel interface is no longer called by any application
- * that is dynamically linked with libc.  It exists solely for
- * the benefit of really old statically-linked applications.
- * It should be removed from the system.
- */
-
-int
-ssig(int signo, void (*func)())
-{
-	int sig;
-	struct proc *p;
-	int flags;
-	int retval = 0;
-	int sigcld_look = 0;
-
-	sig = signo & SIGNO_MASK;
-
-	if (sig <= 0 || sig >= NSIG || sigismember(&cantmask, sig))
-		return (set_errno(EINVAL));
-
-	p = ttoproc(curthread);
-	mutex_enter(&p->p_lock);
-	schedctl_finish_sigblock(curthread);
-	switch (signo & ~SIGNO_MASK) {
-
-	case SIGHOLD:	/* sighold */
-		sigaddset(&curthread->t_hold, sig);
-		mutex_exit(&p->p_lock);
-		return (0);
-
-	case SIGRELSE:	/* sigrelse */
-		sigdelset(&curthread->t_hold, sig);
-		curthread->t_sig_check = 1;	/* so ISSIG will see release */
-		mutex_exit(&p->p_lock);
-		return (0);
-
-	case SIGPAUSE:	/* sigpause */
-		sigdelset(&curthread->t_hold, sig);
-		curthread->t_sig_check = 1;	/* so ISSIG will see release */
-		/* pause() */
-		while (cv_wait_sig_swap(&curthread->t_delay_cv, &p->p_lock))
-			;
-		mutex_exit(&p->p_lock);
-		return (set_errno(EINTR));
-
-	case SIGIGNORE:	/* signore */
-		sigdelset(&curthread->t_hold, sig);
-		curthread->t_sig_check = 1;	/* so ISSIG will see release */
-		func = SIG_IGN;
-		flags = 0;
-		break;
-
-	case SIGDEFER:		/* sigset */
-		if (sigismember(&curthread->t_hold, sig))
-			retval = (int)SIG_HOLD;
-		else
-			retval = (int)(uintptr_t)PTOU(curproc)->u_signal[sig-1];
-		if (func == SIG_HOLD) {
-			sigaddset(&curthread->t_hold, sig);
-			mutex_exit(&p->p_lock);
-			return (retval);
-		}
-
-#if defined(__sparc)
-		/*
-		 * Check alignment of handler
-		 */
-		if (func != SIG_IGN && func != SIG_DFL &&
-		    ((uintptr_t)func & 0x3) != 0) {
-			mutex_exit(&p->p_lock);
-			return (set_errno(EINVAL));
-		}
-#endif
-		sigdelset(&curthread->t_hold, sig);
-		curthread->t_sig_check = 1;	/* so post_syscall sees it */
-		flags = 0;
-		break;
-
-	case 0:	/* signal */
-#if defined(__sparc)
-		/*
-		 * Check alignment of handler
-		 */
-		if (func != SIG_IGN && func != SIG_DFL &&
-		    ((uintptr_t)func & 0x3) != 0) {
-			mutex_exit(&p->p_lock);
-			return (set_errno(EINVAL));
-		}
-#endif
-		retval = (int)(uintptr_t)PTOU(curproc)->u_signal[sig-1];
-		flags = SA_RESETHAND|SA_NODEFER;
-		break;
-
-	default:		/* error */
-		mutex_exit(&p->p_lock);
-		return (set_errno(EINVAL));
-	}
-
-	if (sigismember(&stopdefault, sig))
-		flags |= SA_RESTART;
-	else if (sig == SIGCLD) {
-		flags |= SA_NOCLDSTOP;
-		if (func == SIG_IGN)
-			flags |= SA_NOCLDWAIT;
-		sigcld_look = 1;
-	}
-
-	setsigact(sig, func, nullsmask, flags);
-	mutex_exit(&p->p_lock);
-
-	if (sigcld_look)
-		sigcld_repost();
-
-	return (retval);
-}