17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5f841f6adSraf * Common Development and Distribution License (the "License"). 6f841f6adSraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21e8031f0aSraf 227c478bd9Sstevel@tonic-gate /* 23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 287c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 317c478bd9Sstevel@tonic-gate 32*7257d1b4Sraf #include "lint.h" 337c478bd9Sstevel@tonic-gate #include <sys/types.h> 347c478bd9Sstevel@tonic-gate #include <sys/ucontext.h> 357c478bd9Sstevel@tonic-gate #include <signal.h> 367c478bd9Sstevel@tonic-gate #include <errno.h> 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate int 39e8031f0aSraf sigstack(struct sigstack *nss, struct sigstack *oss) 407c478bd9Sstevel@tonic-gate { 417c478bd9Sstevel@tonic-gate struct sigaltstack nalt; 427c478bd9Sstevel@tonic-gate struct sigaltstack oalt; 437c478bd9Sstevel@tonic-gate struct sigaltstack *naltp; 447c478bd9Sstevel@tonic-gate 457c478bd9Sstevel@tonic-gate if (nss) { 467c478bd9Sstevel@tonic-gate /* Assumes stack growth is down */ 477c478bd9Sstevel@tonic-gate nalt.ss_sp = (char *)nss->ss_sp - SIGSTKSZ; 487c478bd9Sstevel@tonic-gate nalt.ss_size = SIGSTKSZ; 497c478bd9Sstevel@tonic-gate nalt.ss_flags = 0; 507c478bd9Sstevel@tonic-gate naltp = &nalt; 517c478bd9Sstevel@tonic-gate } else 527c478bd9Sstevel@tonic-gate naltp = (struct sigaltstack *)0; 537c478bd9Sstevel@tonic-gate 547c478bd9Sstevel@tonic-gate if (sigaltstack(naltp, &oalt) < 0) 557c478bd9Sstevel@tonic-gate return (-1); 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate if (oss) { 587c478bd9Sstevel@tonic-gate /* Assumes stack growth is down */ 597c478bd9Sstevel@tonic-gate oss->ss_sp = (char *)oalt.ss_sp + oalt.ss_size; 607c478bd9Sstevel@tonic-gate oss->ss_onstack = ((oalt.ss_flags & SS_ONSTACK) != 0); 617c478bd9Sstevel@tonic-gate } 627c478bd9Sstevel@tonic-gate return (0); 637c478bd9Sstevel@tonic-gate } 64