011d4d5f44
* struct sigacts gets a new sigact_sigdesc structure, which has the sigaction and the trampoline/version. Version 0 means "legacy kernel provided trampoline". Other versions are coordinated with machine- dependent code in libc. * sigaction1() grows two more arguments -- the trampoline pointer and the trampoline version. * A new __sigaction_sigtramp() system call is provided to register a trampoline along with a signal handler. * The handler is no longer passed to sensig() functions. Instead, sendsig() looks up the handler by peeking in the sigacts for the process getting the signal (since it has to look in there for the trampoline anyway). * Native sendsig() functions now select the appropriate trampoline and its arguments based on the trampoline version in the sigacts. Changes to libc to use the new facility will be checked in later. Kernel version not bumped; we will ride the 1.6C bump made recently.
178 lines
5.0 KiB
C
178 lines
5.0 KiB
C
/* $NetBSD: linux_sig_notalpha.c,v 1.26 2002/07/04 23:32:11 thorpej Exp $ */
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/*-
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* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Frank van der Linden and Eric Haszlakiewicz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_sig_notalpha.c,v 1.26 2002/07/04 23:32:11 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/filedesc.h>
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#include <sys/mount.h>
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#include <sys/kernel.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/syscallargs.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/linux_syscallargs.h>
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/* Used on: arm, i386, m68k, mips, sparc, sparc64 */
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/* Not used on: alpha */
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/*
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* The Linux signal() system call. I think that the signal() in the C
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* library actually calls sigaction, so I doubt this one is ever used.
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* But hey, it can't hurt having it here. The same restrictions as for
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* sigaction() apply.
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*/
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int
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linux_sys_signal(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_signal_args /* {
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syscallarg(int) signum;
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syscallarg(linux_handler_t) handler;
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} */ *uap = v;
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struct sigaction nbsa, obsa;
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int error, sig;
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*retval = -1;
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sig = SCARG(uap, signum);
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if (sig < 0 || sig >= LINUX__NSIG)
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return (EINVAL);
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nbsa.sa_handler = SCARG(uap, handler);
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sigemptyset(&nbsa.sa_mask);
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nbsa.sa_flags = SA_RESETHAND | SA_NODEFER;
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error = sigaction1(p, linux_to_native_signo[sig],
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&nbsa, &obsa, NULL, 0);
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if (error == 0)
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*retval = (int)obsa.sa_handler;
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return (error);
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}
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/* ARGSUSED */
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int
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linux_sys_siggetmask(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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sigset_t bss;
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linux_old_sigset_t lss;
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int error;
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error = sigprocmask1(p, SIG_SETMASK, 0, &bss);
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if (error)
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return (error);
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native_to_linux_old_sigset(&lss, &bss);
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return (0);
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}
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/*
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* The following three functions fiddle with a process' signal mask.
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* Convert the signal masks because of the different signal
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* values for Linux. The need for this is the reason why
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* they are here, and have not been mapped directly.
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*/
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int
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linux_sys_sigsetmask(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_sigsetmask_args /* {
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syscallarg(linux_old_sigset_t) mask;
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} */ *uap = v;
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sigset_t nbss, obss;
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linux_old_sigset_t nlss, olss;
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int error;
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nlss = SCARG(uap, mask);
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linux_old_to_native_sigset(&nbss, &nlss);
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error = sigprocmask1(p, SIG_SETMASK, &nbss, &obss);
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if (error)
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return (error);
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native_to_linux_old_sigset(&olss, &obss);
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*retval = olss;
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return (0);
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}
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int
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linux_sys_sigprocmask(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_sigprocmask_args /* {
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syscallarg(int) how;
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syscallarg(const linux_old_sigset_t *) set;
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syscallarg(linux_old_sigset_t *) oset;
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} */ *uap = v;
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return(linux_sigprocmask1(p, SCARG(uap, how),
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SCARG(uap, set), SCARG(uap, oset)));
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}
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/*
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* The deprecated pause(2), which is really just an instance
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* of sigsuspend(2).
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*/
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int
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linux_sys_pause(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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return (sigsuspend1(p, 0));
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}
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