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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 29 #include <sys/param.h> 30 #include <sys/types.h> 31 #include <sys/sysmacros.h> 32 #include <sys/systm.h> 33 #include <sys/errno.h> 34 #include <sys/proc.h> 35 #include <sys/fault.h> 36 #include <sys/signal.h> 37 #include <sys/schedctl.h> 38 #include <sys/debug.h> 39 40 int64_t 41 lwp_sigmask(int how, uint_t bits0, uint_t bits1) 42 { 43 kthread_t *t = curthread; 44 proc_t *p = ttoproc(t); 45 rval_t rv; 46 47 /* 48 * We don't need to acquire p->p_lock here; 49 * we are manipulating thread-private data. 50 */ 51 52 schedctl_finish_sigblock(t); 53 54 bits0 &= (FILLSET0 & ~CANTMASK0); 55 bits1 &= (FILLSET1 & ~CANTMASK1); 56 57 rv.r_val1 = t->t_hold.__sigbits[0]; 58 rv.r_val2 = t->t_hold.__sigbits[1]; 59 60 switch (how) { 61 case SIG_BLOCK: 62 t->t_hold.__sigbits[0] |= bits0; 63 t->t_hold.__sigbits[1] |= bits1; 64 break; 65 case SIG_UNBLOCK: 66 t->t_hold.__sigbits[0] &= ~bits0; 67 t->t_hold.__sigbits[1] &= ~bits1; 68 if (sigcheck(p, t)) 69 t->t_sig_check = 1; 70 break; 71 case SIG_SETMASK: 72 t->t_hold.__sigbits[0] = bits0; 73 t->t_hold.__sigbits[1] = bits1; 74 if (sigcheck(p, t)) 75 t->t_sig_check = 1; 76 break; 77 } 78 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