1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 24 25 /* 26 * Copyright 1994-2003 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <sys/sysmacros.h> 35 #include <sys/systm.h> 36 #include <sys/errno.h> 37 #include <sys/proc.h> 38 #include <sys/fault.h> 39 #include <sys/signal.h> 40 #include <sys/schedctl.h> 41 #include <sys/debug.h> 42 43 int64_t 44 lwp_sigmask(int how, uint_t bits0, uint_t bits1) 45 { 46 kthread_t *t = curthread; 47 proc_t *p = ttoproc(t); 48 rval_t rv; 49 50 mutex_enter(&p->p_lock); 51 schedctl_finish_sigblock(t); 52 53 bits0 &= (FILLSET0 & ~CANTMASK0); 54 bits1 &= (FILLSET1 & ~CANTMASK1); 55 56 rv.r_val1 = t->t_hold.__sigbits[0]; 57 rv.r_val2 = t->t_hold.__sigbits[1]; 58 59 switch (how) { 60 case SIG_BLOCK: 61 t->t_hold.__sigbits[0] |= bits0; 62 t->t_hold.__sigbits[1] |= bits1; 63 break; 64 case SIG_UNBLOCK: 65 t->t_hold.__sigbits[0] &= ~bits0; 66 t->t_hold.__sigbits[1] &= ~bits1; 67 if (sigcheck(p, t)) 68 t->t_sig_check = 1; 69 break; 70 case SIG_SETMASK: 71 t->t_hold.__sigbits[0] = bits0; 72 t->t_hold.__sigbits[1] = bits1; 73 if (sigcheck(p, t)) 74 t->t_sig_check = 1; 75 break; 76 } 77 78 mutex_exit(&p->p_lock); 79 return (rv.r_vals); 80 } 81 82 /* 83 * This system call is no longer called from libc. 84 * It exists solely for the benefit of statically-linked 85 * binaries from the past. It should be eliminated. 86 */ 87 int 88 sigprocmask(int how, sigset_t *setp, sigset_t *osetp) 89 { 90 sigset_t set; 91 k_sigset_t kset; 92 rval_t rv; 93 94 /* 95 * User's oset and set might be the same address, so copyin first and 96 * save before copying out. 97 */ 98 if (setp) { 99 switch (how) { 100 case SIG_BLOCK: 101 case SIG_UNBLOCK: 102 case SIG_SETMASK: 103 break; 104 default: 105 return (set_errno(EINVAL)); 106 } 107 if (copyin((caddr_t)setp, (caddr_t)&set, sizeof (sigset_t))) 108 return (set_errno(EFAULT)); 109 sigutok(&set, &kset); 110 } else { 111 /* none of SIG_BLOCK, SIG_UNBLOCK, SIG_SETMASK equals 0 */ 112 how = 0; 113 sigemptyset(&kset); 114 } 115 116 rv.r_vals = lwp_sigmask(how, kset.__sigbits[0], kset.__sigbits[1]); 117 118 if (osetp) { 119 kset.__sigbits[0] = rv.r_val1; 120 kset.__sigbits[1] = rv.r_val2; 121 sigktou(&kset, &set); 122 if (copyout((caddr_t)&set, (caddr_t)osetp, sizeof (sigset_t))) 123 return (set_errno(EFAULT)); 124 } 125 126 return (0); 127 } 128