1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/param.h> 33*0Sstevel@tonic-gate #include <sys/types.h> 34*0Sstevel@tonic-gate #include <sys/sysmacros.h> 35*0Sstevel@tonic-gate #include <sys/systm.h> 36*0Sstevel@tonic-gate #include <sys/errno.h> 37*0Sstevel@tonic-gate #include <sys/proc.h> 38*0Sstevel@tonic-gate #include <sys/fault.h> 39*0Sstevel@tonic-gate #include <sys/signal.h> 40*0Sstevel@tonic-gate #include <sys/siginfo.h> 41*0Sstevel@tonic-gate #include <sys/debug.h> 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate int 44*0Sstevel@tonic-gate sigaltstack(struct sigaltstack *ssp, struct sigaltstack *oss) 45*0Sstevel@tonic-gate { 46*0Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 47*0Sstevel@tonic-gate struct sigaltstack ss; 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate /* 50*0Sstevel@tonic-gate * User's oss and ss might be the same address, so copyin first and 51*0Sstevel@tonic-gate * save before copying out. 52*0Sstevel@tonic-gate */ 53*0Sstevel@tonic-gate if (ssp) { 54*0Sstevel@tonic-gate if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK) 55*0Sstevel@tonic-gate return (set_errno(EPERM)); 56*0Sstevel@tonic-gate if (copyin(ssp, &ss, sizeof (ss))) 57*0Sstevel@tonic-gate return (set_errno(EFAULT)); 58*0Sstevel@tonic-gate if (ss.ss_flags & ~SS_DISABLE) 59*0Sstevel@tonic-gate return (set_errno(EINVAL)); 60*0Sstevel@tonic-gate if (!(ss.ss_flags & SS_DISABLE) && ss.ss_size < MINSIGSTKSZ) 61*0Sstevel@tonic-gate return (set_errno(ENOMEM)); 62*0Sstevel@tonic-gate } 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate if (oss) { 65*0Sstevel@tonic-gate if (copyout(&lwp->lwp_sigaltstack, 66*0Sstevel@tonic-gate oss, sizeof (struct sigaltstack))) 67*0Sstevel@tonic-gate return (set_errno(EFAULT)); 68*0Sstevel@tonic-gate } 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate if (ssp) 71*0Sstevel@tonic-gate lwp->lwp_sigaltstack = ss; 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate return (0); 74*0Sstevel@tonic-gate } 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate #ifdef _LP64 77*0Sstevel@tonic-gate int 78*0Sstevel@tonic-gate sigaltstack32(struct sigaltstack32 *ssp, struct sigaltstack32 *oss) 79*0Sstevel@tonic-gate { 80*0Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread); 81*0Sstevel@tonic-gate struct sigaltstack *ss; 82*0Sstevel@tonic-gate struct sigaltstack32 ss32, oss32; 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate /* 85*0Sstevel@tonic-gate * User's oss and ss might be the same address, so copyin first and 86*0Sstevel@tonic-gate * save before copying out. 87*0Sstevel@tonic-gate */ 88*0Sstevel@tonic-gate if (ssp) { 89*0Sstevel@tonic-gate if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK) 90*0Sstevel@tonic-gate return (set_errno(EPERM)); 91*0Sstevel@tonic-gate if (copyin(ssp, &ss32, sizeof (ss32))) 92*0Sstevel@tonic-gate return (set_errno(EFAULT)); 93*0Sstevel@tonic-gate if (ss32.ss_flags & ~SS_DISABLE) 94*0Sstevel@tonic-gate return (set_errno(EINVAL)); 95*0Sstevel@tonic-gate if (!(ss32.ss_flags & SS_DISABLE) && ss32.ss_size < MINSIGSTKSZ) 96*0Sstevel@tonic-gate return (set_errno(ENOMEM)); 97*0Sstevel@tonic-gate } 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate if (oss) { 100*0Sstevel@tonic-gate /* 101*0Sstevel@tonic-gate * copy to ILP32 struct before copyout. 102*0Sstevel@tonic-gate */ 103*0Sstevel@tonic-gate ss = &lwp->lwp_sigaltstack; 104*0Sstevel@tonic-gate oss32.ss_sp = (caddr32_t)(uintptr_t)ss->ss_sp; 105*0Sstevel@tonic-gate oss32.ss_size = (size32_t)ss->ss_size; 106*0Sstevel@tonic-gate oss32.ss_flags = ss->ss_flags; 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate if (copyout(&oss32, oss, sizeof (oss32))) 109*0Sstevel@tonic-gate return (set_errno(EFAULT)); 110*0Sstevel@tonic-gate } 111*0Sstevel@tonic-gate 112*0Sstevel@tonic-gate if (ssp) { 113*0Sstevel@tonic-gate ss = &lwp->lwp_sigaltstack; 114*0Sstevel@tonic-gate ss->ss_sp = (void *)(uintptr_t)ss32.ss_sp; 115*0Sstevel@tonic-gate ss->ss_size = (size_t)ss32.ss_size; 116*0Sstevel@tonic-gate ss->ss_flags = ss32.ss_flags; 117*0Sstevel@tonic-gate } 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate return (0); 120*0Sstevel@tonic-gate } 121*0Sstevel@tonic-gate #endif /* _LP64 */ 122