1 /* $NetBSD: linux_sig_notalpha.c,v 1.41 2021/11/25 03:08:04 ryo Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: linux_sig_notalpha.c,v 1.41 2021/11/25 03:08:04 ryo Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/proc.h> 42 #include <sys/filedesc.h> 43 #include <sys/mount.h> 44 #include <sys/kernel.h> 45 #include <sys/signal.h> 46 #include <sys/signalvar.h> 47 48 #include <sys/syscallargs.h> 49 50 #include <compat/linux/common/linux_types.h> 51 #include <compat/linux/common/linux_signal.h> 52 #include <compat/linux/common/linux_util.h> 53 #include <compat/linux/common/linux_ipc.h> 54 #include <compat/linux/common/linux_sem.h> 55 56 #include <compat/linux/linux_syscallargs.h> 57 58 /* Used on: arm, i386, m68k, mips, sparc, sparc64 */ 59 /* Partly used on: aarch64, amd64 */ 60 /* Not used on: alpha */ 61 62 #if !defined(__aarch64__) && !defined(__amd64__) 63 /* 64 * The Linux signal() system call. I think that the signal() in the C 65 * library actually calls sigaction, so I doubt this one is ever used. 66 * But hey, it can't hurt having it here. The same restrictions as for 67 * sigaction() apply. 68 */ 69 int 70 linux_sys_signal(struct lwp *l, const struct linux_sys_signal_args *uap, register_t *retval) 71 { 72 /* { 73 syscallarg(int) signum; 74 syscallarg(linux_handler_t) handler; 75 } */ 76 struct sigaction nbsa, obsa; 77 int error, sig; 78 79 *retval = -1; 80 sig = SCARG(uap, signum); 81 if (sig < 0 || sig >= LINUX__NSIG) 82 return (EINVAL); 83 84 nbsa.sa_handler = SCARG(uap, handler); 85 sigemptyset(&nbsa.sa_mask); 86 nbsa.sa_flags = SA_RESETHAND | SA_NODEFER; 87 error = sigaction1(l, linux_to_native_signo[sig], 88 &nbsa, &obsa, NULL, 0); 89 if (error == 0) 90 *retval = (int)(long)obsa.sa_handler; /* XXXmanu cast */ 91 return (error); 92 } 93 94 95 /* ARGSUSED */ 96 int 97 linux_sys_siggetmask(struct lwp *l, const void *v, register_t *retval) 98 { 99 struct proc *p = l->l_proc; 100 sigset_t bss; 101 linux_old_sigset_t lss; 102 int error; 103 104 mutex_enter(p->p_lock); 105 error = sigprocmask1(l, SIG_SETMASK, 0, &bss); 106 mutex_exit(p->p_lock); 107 if (error) 108 return (error); 109 native_to_linux_old_sigset(&lss, &bss); 110 *retval = lss; 111 return (0); 112 } 113 114 /* 115 * The following three functions fiddle with a process' signal mask. 116 * Convert the signal masks because of the different signal 117 * values for Linux. The need for this is the reason why 118 * they are here, and have not been mapped directly. 119 */ 120 int 121 linux_sys_sigsetmask(struct lwp *l, const struct linux_sys_sigsetmask_args *uap, register_t *retval) 122 { 123 /* { 124 syscallarg(linux_old_sigset_t) mask; 125 } */ 126 sigset_t nbss, obss; 127 linux_old_sigset_t nlss, olss; 128 struct proc *p = l->l_proc; 129 int error; 130 131 nlss = SCARG(uap, mask); 132 linux_old_to_native_sigset(&nbss, &nlss); 133 mutex_enter(p->p_lock); 134 error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss); 135 mutex_exit(p->p_lock); 136 if (error) 137 return (error); 138 native_to_linux_old_sigset(&olss, &obss); 139 *retval = olss; 140 return (0); 141 } 142 143 int 144 linux_sys_sigprocmask(struct lwp *l, const struct linux_sys_sigprocmask_args *uap, register_t *retval) 145 { 146 /* { 147 syscallarg(int) how; 148 syscallarg(const linux_old_sigset_t *) set; 149 syscallarg(linux_old_sigset_t *) oset; 150 } */ 151 152 return(linux_sigprocmask1(l, SCARG(uap, how), 153 SCARG(uap, set), SCARG(uap, oset))); 154 } 155 #endif /* !__amd64__ */ 156 157 /* 158 * The deprecated pause(2), which is really just an instance 159 * of sigsuspend(2). 160 */ 161 int 162 linux_sys_pause(struct lwp *l, const void *v, register_t *retval) 163 { 164 165 return (sigsuspend1(l, 0)); 166 } 167 168
Indexes created Sat Sep 20 22:09:52 GMT 2025