OpenSolaris Launch

1 files changed, 121 insertions, 0 deletions

diff --git a/usr/src/uts/common/syscall/sigaltstack.c b/usr/src/uts/common/syscall/sigaltstack.c
new file mode 100644
index 0000000000..4c310390b3
--- /dev/null
+++ b/usr/src/uts/common/syscall/sigaltstack.c
@@ -0,0 +1,121 @@
+/*
+ * 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.
+ *
+ * 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 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/sysmacros.h>
+#include <sys/systm.h>
+#include <sys/errno.h>
+#include <sys/proc.h>
+#include <sys/fault.h>
+#include <sys/signal.h>
+#include <sys/siginfo.h>
+#include <sys/debug.h>
+
+int
+sigaltstack(struct sigaltstack *ssp, struct sigaltstack *oss)
+{
+	klwp_t *lwp = ttolwp(curthread);
+	struct sigaltstack ss;
+
+	/*
+	 * User's oss and ss might be the same address, so copyin first and
+	 * save before copying out.
+	 */
+	if (ssp) {
+		if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK)
+			return (set_errno(EPERM));
+		if (copyin(ssp, &ss, sizeof (ss)))
+			return (set_errno(EFAULT));
+		if (ss.ss_flags & ~SS_DISABLE)
+			return (set_errno(EINVAL));
+		if (!(ss.ss_flags & SS_DISABLE) && ss.ss_size < MINSIGSTKSZ)
+			return (set_errno(ENOMEM));
+	}
+
+	if (oss) {
+		if (copyout(&lwp->lwp_sigaltstack,
+		    oss, sizeof (struct sigaltstack)))
+			return (set_errno(EFAULT));
+	}
+
+	if (ssp)
+		lwp->lwp_sigaltstack = ss;
+
+	return (0);
+}
+
+#ifdef _LP64
+int
+sigaltstack32(struct sigaltstack32 *ssp, struct sigaltstack32 *oss)
+{
+	klwp_t *lwp = ttolwp(curthread);
+	struct sigaltstack   *ss;
+	struct sigaltstack32 ss32, oss32;
+
+	/*
+	 * User's oss and ss might be the same address, so copyin first and
+	 * save before copying out.
+	 */
+	if (ssp) {
+		if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK)
+			return (set_errno(EPERM));
+		if (copyin(ssp, &ss32, sizeof (ss32)))
+			return (set_errno(EFAULT));
+		if (ss32.ss_flags & ~SS_DISABLE)
+			return (set_errno(EINVAL));
+		if (!(ss32.ss_flags & SS_DISABLE) && ss32.ss_size < MINSIGSTKSZ)
+			return (set_errno(ENOMEM));
+	}
+
+	if (oss) {
+		/*
+		 * copy to ILP32 struct before copyout.
+		 */
+		ss = &lwp->lwp_sigaltstack;
+		oss32.ss_sp    = (caddr32_t)(uintptr_t)ss->ss_sp;
+		oss32.ss_size  = (size32_t)ss->ss_size;
+		oss32.ss_flags = ss->ss_flags;
+
+		if (copyout(&oss32, oss, sizeof (oss32)))
+			return (set_errno(EFAULT));
+	}
+
+	if (ssp) {
+		ss = &lwp->lwp_sigaltstack;
+		ss->ss_sp = (void *)(uintptr_t)ss32.ss_sp;
+		ss->ss_size = (size_t)ss32.ss_size;
+		ss->ss_flags = ss32.ss_flags;
+	}
+
+	return (0);
+}
+#endif /* _LP64 */