| 1 | /* $NetBSD: linux_sig_notalpha.c,v 1.39 2009/06/02 16:53:07 njoly 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 1.39 2009/06/02 16:53:07 njoly 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 | /* Not used on: alpha */ |
| 60 | |
| 61 | #if !defined(__amd64__) |
| 62 | /* |
| 63 | * The Linux signal() system call. I think that the signal() in the C |
| 64 | * library actually calls sigaction, so I doubt this one is ever used. |
| 65 | * But hey, it can't hurt having it here. The same restrictions as for |
| 66 | * sigaction() apply. |
| 67 | */ |
| 68 | int |
| 69 | linux_sys_signal(struct lwp *l, const struct linux_sys_signal_args *uap, register_t *retval) |
| 70 | { |
| 71 | /* { |
| 72 | syscallarg(int) signum; |
| 73 | syscallarg(linux_handler_t) handler; |
| 74 | } */ |
| 75 | struct sigaction nbsa, obsa; |
| 76 | int error, sig; |
| 77 | |
| 78 | *retval = -1; |
| 79 | sig = SCARG(uap, signum); |
| 80 | if (sig < 0 || sig >= LINUX__NSIG) |
| 81 | return (EINVAL); |
| 82 | |
| 83 | nbsa.sa_handler = SCARG(uap, handler); |
| 84 | sigemptyset(&nbsa.sa_mask); |
| 85 | nbsa.sa_flags = SA_RESETHAND | SA_NODEFER; |
| 86 | error = sigaction1(l, linux_to_native_signo[sig], |
| 87 | &nbsa, &obsa, NULL, 0); |
| 88 | if (error == 0) |
| 89 | *retval = (int)(long)obsa.sa_handler; /* XXXmanu cast */ |
| 90 | return (error); |
| 91 | } |
| 92 | |
| 93 | |
| 94 | /* ARGSUSED */ |
| 95 | int |
| 96 | linux_sys_siggetmask(struct lwp *l, const void *v, register_t *retval) |
| 97 | { |
| 98 | struct proc *p = l->l_proc; |
| 99 | sigset_t bss; |
| 100 | linux_old_sigset_t lss; |
| 101 | int error; |
| 102 | |
| 103 | mutex_enter(p->p_lock); |
| 104 | error = sigprocmask1(l, SIG_SETMASK, 0, &bss); |
| 105 | mutex_exit(p->p_lock); |
| 106 | if (error) |
| 107 | return (error); |
| 108 | native_to_linux_old_sigset(&lss, &bss); |
| 109 | *retval = lss; |
| 110 | return (0); |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * The following three functions fiddle with a process' signal mask. |
| 115 | * Convert the signal masks because of the different signal |
| 116 | * values for Linux. The need for this is the reason why |
| 117 | * they are here, and have not been mapped directly. |
| 118 | */ |
| 119 | int |
| 120 | linux_sys_sigsetmask(struct lwp *l, const struct linux_sys_sigsetmask_args *uap, register_t *retval) |
| 121 | { |
| 122 | /* { |
| 123 | syscallarg(linux_old_sigset_t) mask; |
| 124 | } */ |
| 125 | sigset_t nbss, obss; |
| 126 | linux_old_sigset_t nlss, olss; |
| 127 | struct proc *p = l->l_proc; |
| 128 | int error; |
| 129 | |
| 130 | nlss = SCARG(uap, mask); |
| 131 | linux_old_to_native_sigset(&nbss, &nlss); |
| 132 | mutex_enter(p->p_lock); |
| 133 | error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss); |
| 134 | mutex_exit(p->p_lock); |
| 135 | if (error) |
| 136 | return (error); |
| 137 | native_to_linux_old_sigset(&olss, &obss); |
| 138 | *retval = olss; |
| 139 | return (0); |
| 140 | } |
| 141 | |
| 142 | int |
| 143 | linux_sys_sigprocmask(struct lwp *l, const struct linux_sys_sigprocmask_args *uap, register_t *retval) |
| 144 | { |
| 145 | /* { |
| 146 | syscallarg(int) how; |
| 147 | syscallarg(const linux_old_sigset_t *) set; |
| 148 | syscallarg(linux_old_sigset_t *) oset; |
| 149 | } */ |
| 150 | |
| 151 | return(linux_sigprocmask1(l, SCARG(uap, how), |
| 152 | SCARG(uap, set), SCARG(uap, oset))); |
| 153 | } |
| 154 | #endif /* !__amd64__ */ |
| 155 | |
| 156 | /* |
| 157 | * The deprecated pause(2), which is really just an instance |
| 158 | * of sigsuspend(2). |
| 159 | */ |
| 160 | int |
| 161 | linux_sys_pause(struct lwp *l, const void *v, register_t *retval) |
| 162 | { |
| 163 | |
| 164 | return (sigsuspend1(l, 0)); |
| 165 | } |
| 166 | |
| 167 | |