646 lines
14 KiB
C
646 lines
14 KiB
C
/* $NetBSD: svr4_signal.c,v 1.20 1996/01/04 22:23:06 jtc Exp $ */
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/*
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.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/malloc.h>
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#include <sys/syscallargs.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_syscallargs.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_ucontext.h>
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#define sigemptyset(s) bzero((s), sizeof(*(s)))
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#define sigismember(s, n) (*(s) & sigmask(n))
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#define sigaddset(s, n) (*(s) |= sigmask(n))
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#define svr4_sigmask(n) (1 << (((n) - 1) & (32 - 1)))
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#define svr4_sigword(n) (((n) - 1) >> 5)
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#define svr4_sigemptyset(s) bzero((s), sizeof(*(s)))
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#define svr4_sigismember(s, n) ((s)->bits[svr4_sigword(n)] & svr4_sigmask(n))
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#define svr4_sigaddset(s, n) ((s)->bits[svr4_sigword(n)] |= svr4_sigmask(n))
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static inline int
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svr4_sigfillset(s)
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svr4_sigset_t *s;
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{
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int i;
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svr4_sigemptyset(s);
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for (i = 1; i < SVR4_NSIG; i++)
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svr4_sigaddset(s, i);
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}
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int bsd_to_svr4_sig[] = {
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0,
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SVR4_SIGHUP,
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SVR4_SIGINT,
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SVR4_SIGQUIT,
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SVR4_SIGILL,
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SVR4_SIGTRAP,
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SVR4_SIGABRT,
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SVR4_SIGEMT,
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SVR4_SIGFPE,
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SVR4_SIGKILL,
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SVR4_SIGBUS,
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SVR4_SIGSEGV,
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SVR4_SIGSYS,
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SVR4_SIGPIPE,
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SVR4_SIGALRM,
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SVR4_SIGTERM,
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SVR4_SIGURG,
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SVR4_SIGSTOP,
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SVR4_SIGTSTP,
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SVR4_SIGCONT,
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SVR4_SIGCHLD,
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SVR4_SIGTTIN,
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SVR4_SIGTTOU,
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SVR4_SIGIO,
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SVR4_SIGXCPU,
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SVR4_SIGXFSZ,
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SVR4_SIGVTALRM,
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SVR4_SIGPROF,
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SVR4_SIGWINCH,
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0,
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SVR4_SIGUSR1,
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SVR4_SIGUSR2,
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};
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int svr4_to_bsd_sig[] = {
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0,
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SIGHUP,
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SIGINT,
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SIGQUIT,
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SIGILL,
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SIGTRAP,
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SIGABRT,
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SIGEMT,
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SIGFPE,
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SIGKILL,
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SIGBUS,
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SIGSEGV,
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SIGSYS,
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SIGPIPE,
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SIGALRM,
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SIGTERM,
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SIGUSR1,
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SIGUSR2,
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SIGCHLD,
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0,
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SIGWINCH,
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SIGURG,
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SIGIO,
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SIGSTOP,
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SIGTSTP,
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SIGCONT,
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SIGTTIN,
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SIGTTOU,
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SIGVTALRM,
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SIGPROF,
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SIGXCPU,
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SIGXFSZ,
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};
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void
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svr4_to_bsd_sigset(sss, bss)
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const svr4_sigset_t *sss;
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sigset_t *bss;
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{
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int i, newsig;
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sigemptyset(bss);
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for (i = 1; i < SVR4_NSIG; i++) {
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if (svr4_sigismember(sss, i)) {
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newsig = svr4_to_bsd_sig[i];
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if (newsig)
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sigaddset(bss, newsig);
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}
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}
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}
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void
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bsd_to_svr4_sigset(bss, sss)
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const sigset_t *bss;
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svr4_sigset_t *sss;
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{
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int i, newsig;
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svr4_sigemptyset(sss);
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for (i = 1; i < NSIG; i++) {
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if (sigismember(bss, i)) {
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newsig = bsd_to_svr4_sig[i];
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if (newsig)
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svr4_sigaddset(sss, newsig);
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}
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}
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}
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/*
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* XXX: Only a subset of the flags is currently implemented.
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*/
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void
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svr4_to_bsd_sigaction(ssa, bsa)
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const struct svr4_sigaction *ssa;
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struct sigaction *bsa;
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{
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bsa->sa_handler = ssa->sa_handler;
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svr4_to_bsd_sigset(&ssa->sa_mask, &bsa->sa_mask);
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bsa->sa_flags = 0;
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if ((ssa->sa_flags & SVR4_SA_ONSTACK) != 0)
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bsa->sa_flags |= SA_ONSTACK;
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if ((ssa->sa_flags & SVR4_SA_RESTART) != 0)
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bsa->sa_flags |= SA_RESTART;
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if ((ssa->sa_flags & SVR4_SA_RESETHAND) != 0)
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bsa->sa_flags |= SA_RESETHAND;
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if ((ssa->sa_flags & SVR4_SA_NOCLDSTOP) != 0)
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bsa->sa_flags |= SA_NOCLDSTOP;
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if ((ssa->sa_flags & SVR4_SA_NODEFER) != 0)
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bsa->sa_flags |= SA_NODEFER;
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}
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void
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bsd_to_svr4_sigaction(bsa, ssa)
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const struct sigaction *bsa;
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struct svr4_sigaction *ssa;
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{
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ssa->sa_handler = bsa->sa_handler;
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bsd_to_svr4_sigset(&bsa->sa_mask, &ssa->sa_mask);
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ssa->sa_flags = 0;
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if ((bsa->sa_flags & SA_ONSTACK) != 0)
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ssa->sa_flags |= SA_ONSTACK;
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if ((bsa->sa_flags & SA_RESETHAND) != 0)
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ssa->sa_flags |= SA_RESETHAND;
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if ((bsa->sa_flags & SA_RESTART) != 0)
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ssa->sa_flags |= SA_RESTART;
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if ((bsa->sa_flags & SA_NODEFER) != 0)
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ssa->sa_flags |= SA_NODEFER;
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if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
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ssa->sa_flags |= SA_NOCLDSTOP;
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}
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void
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svr4_to_bsd_sigaltstack(sss, bss)
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const struct svr4_sigaltstack *sss;
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struct sigaltstack *bss;
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{
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bss->ss_sp = sss->ss_sp;
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bss->ss_size = sss->ss_size;
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bss->ss_flags = 0;
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if ((sss->ss_flags & SVR4_SS_DISABLE) != 0)
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bss->ss_flags |= SS_DISABLE;
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if ((sss->ss_flags & SVR4_SS_ONSTACK) != 0)
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bss->ss_flags |= SS_ONSTACK;
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}
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void
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bsd_to_svr4_sigaltstack(bss, sss)
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const struct sigaltstack *bss;
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struct svr4_sigaltstack *sss;
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{
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sss->ss_sp = bss->ss_sp;
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sss->ss_size = bss->ss_size;
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sss->ss_flags = 0;
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if ((bss->ss_flags & SS_DISABLE) != 0)
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sss->ss_flags |= SVR4_SS_DISABLE;
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if ((bss->ss_flags & SS_ONSTACK) != 0)
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sss->ss_flags |= SVR4_SS_ONSTACK;
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}
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int
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svr4_sys_sigaction(p, v, retval)
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register 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 svr4_sys_sigaction_args /* {
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syscallarg(int) signum;
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syscallarg(struct svr4_sigaction *) nsa;
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syscallarg(struct svr4_sigaction *) osa;
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} */ *uap = v;
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struct svr4_sigaction *nssa, *ossa, tmpssa;
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struct sigaction *nbsa, *obsa, tmpbsa;
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struct sys_sigaction_args sa;
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caddr_t sg;
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int error;
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sg = stackgap_init(p->p_emul);
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nssa = SCARG(uap, nsa);
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ossa = SCARG(uap, osa);
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if (ossa != NULL)
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obsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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else
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obsa = NULL;
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if (nssa != NULL) {
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nbsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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if ((error = copyin(nssa, &tmpssa, sizeof(tmpssa))) != 0)
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return error;
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svr4_to_bsd_sigaction(&tmpssa, &tmpbsa);
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if ((error = copyout(&tmpbsa, nbsa, sizeof(tmpbsa))) != 0)
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return error;
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} else
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nbsa = NULL;
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SCARG(&sa, signum) = svr4_to_bsd_sig[SCARG(uap, signum)];
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SCARG(&sa, nsa) = nbsa;
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SCARG(&sa, osa) = obsa;
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if ((error = sys_sigaction(p, &sa, retval)) != 0)
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return error;
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if (ossa != NULL) {
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if ((error = copyin(obsa, &tmpbsa, sizeof(tmpbsa))) != 0)
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return error;
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bsd_to_svr4_sigaction(&tmpbsa, &tmpssa);
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if ((error = copyout(&tmpssa, ossa, sizeof(tmpssa))) != 0)
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return error;
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}
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return 0;
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}
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int
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svr4_sys_sigaltstack(p, v, retval)
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register 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 svr4_sys_sigaltstack_args /* {
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syscallarg(struct svr4_sigaltstack *) nss;
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syscallarg(struct svr4_sigaltstack *) oss;
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} */ *uap = v;
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struct svr4_sigaltstack *nsss, *osss, tmpsss;
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struct sigaltstack *nbss, *obss, tmpbss;
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struct sys_sigaltstack_args sa;
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caddr_t sg;
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int error;
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sg = stackgap_init(p->p_emul);
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nsss = SCARG(uap, nss);
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osss = SCARG(uap, oss);
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if (osss != NULL)
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obss = stackgap_alloc(&sg, sizeof(struct sigaltstack));
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else
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obss = NULL;
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if (nsss != NULL) {
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nbss = stackgap_alloc(&sg, sizeof(struct sigaltstack));
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if ((error = copyin(nsss, &tmpsss, sizeof(tmpsss))) != 0)
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return error;
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svr4_to_bsd_sigaltstack(&tmpsss, &tmpbss);
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if ((error = copyout(&tmpbss, nbss, sizeof(tmpbss))) != 0)
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return error;
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} else
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nbss = NULL;
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SCARG(&sa, nss) = nbss;
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SCARG(&sa, oss) = obss;
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if ((error = sys_sigaltstack(p, &sa, retval)) != 0)
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return error;
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if (obss != NULL) {
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if ((error = copyin(obss, &tmpbss, sizeof(tmpbss))) != 0)
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return error;
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bsd_to_svr4_sigaltstack(&tmpbss, &tmpsss);
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if ((error = copyout(&tmpsss, osss, sizeof(tmpsss))) != 0)
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return error;
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}
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return 0;
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}
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/*
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* Stolen from the ibcs2 one
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*/
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int
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svr4_sys_signal(p, v, retval)
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register 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 svr4_sys_signal_args /* {
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syscallarg(int) signum;
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syscallarg(svr4_sig_t) handler;
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} */ *uap = v;
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int signum = svr4_to_bsd_sig[SVR4_SIGNO(SCARG(uap, signum))];
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int error;
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caddr_t sg = stackgap_init(p->p_emul);
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if (signum <= 0 || signum >= SVR4_NSIG) {
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if (SVR4_SIGCALL(SCARG(uap, signum)) == SVR4_SIGNAL_MASK ||
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SVR4_SIGCALL(SCARG(uap, signum)) == SVR4_SIGDEFER_MASK)
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*retval = (int)SVR4_SIG_ERR;
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return EINVAL;
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}
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switch (SVR4_SIGCALL(SCARG(uap, signum))) {
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case SVR4_SIGDEFER_MASK:
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/*
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* sigset is identical to signal() except
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* that SIG_HOLD is allowed as
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* an action.
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*/
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if (SCARG(uap, handler) == SVR4_SIG_HOLD) {
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struct sys_sigprocmask_args sa;
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SCARG(&sa, how) = SIG_BLOCK;
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SCARG(&sa, mask) = sigmask(signum);
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return sys_sigprocmask(p, &sa, retval);
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}
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/* FALLTHROUGH */
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case SVR4_SIGNAL_MASK:
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{
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struct sys_sigaction_args sa_args;
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struct sigaction *nbsa, *obsa, sa;
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nbsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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obsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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SCARG(&sa_args, signum) = signum;
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SCARG(&sa_args, nsa) = nbsa;
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SCARG(&sa_args, osa) = obsa;
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sa.sa_handler = SCARG(uap, handler);
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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#if 0
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if (signum != SIGALRM)
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sa.sa_flags = SA_RESTART;
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#endif
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if ((error = copyout(&sa, nbsa, sizeof(sa))) != 0)
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return error;
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if ((error = sys_sigaction(p, &sa_args, retval)) != 0) {
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DPRINTF(("signal: sigaction failed: %d\n",
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error));
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*retval = (int)SVR4_SIG_ERR;
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return error;
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}
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if ((error = copyin(obsa, &sa, sizeof(sa))) != 0)
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return error;
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*retval = (int)sa.sa_handler;
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return 0;
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}
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case SVR4_SIGHOLD_MASK:
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{
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struct sys_sigprocmask_args sa;
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SCARG(&sa, how) = SIG_BLOCK;
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SCARG(&sa, mask) = sigmask(signum);
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return sys_sigprocmask(p, &sa, retval);
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}
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case SVR4_SIGRELSE_MASK:
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{
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struct sys_sigprocmask_args sa;
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SCARG(&sa, how) = SIG_UNBLOCK;
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SCARG(&sa, mask) = sigmask(signum);
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return sys_sigprocmask(p, &sa, retval);
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}
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case SVR4_SIGIGNORE_MASK:
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{
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struct sys_sigaction_args sa_args;
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struct sigaction *bsa, sa;
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bsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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SCARG(&sa_args, signum) = signum;
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SCARG(&sa_args, nsa) = bsa;
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SCARG(&sa_args, osa) = NULL;
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sa.sa_handler = SIG_IGN;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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if ((error = copyout(&sa, bsa, sizeof(sa))) != 0)
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return error;
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if ((error = sys_sigaction(p, &sa_args, retval)) != 0) {
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DPRINTF(("sigignore: sigaction failed\n"));
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return error;
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}
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return 0;
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}
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case SVR4_SIGPAUSE_MASK:
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{
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struct sys_sigsuspend_args sa;
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SCARG(&sa, mask) = p->p_sigmask & ~sigmask(signum);
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return sys_sigsuspend(p, &sa, retval);
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}
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default:
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return ENOSYS;
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}
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}
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int
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svr4_sys_sigprocmask(p, v, retval)
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register 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 svr4_sys_sigprocmask_args /* {
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syscallarg(int) how;
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syscallarg(svr4_sigset_t *) set;
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syscallarg(svr4_sigset_t *) oset;
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} */ *uap = v;
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svr4_sigset_t sss;
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|
sigset_t bss;
|
|
int error = 0;
|
|
|
|
if (SCARG(uap, oset) != NULL) {
|
|
/* Fix the return value first if needed */
|
|
bsd_to_svr4_sigset(&p->p_sigmask, &sss);
|
|
if ((error = copyout(&sss, SCARG(uap, oset), sizeof(sss))) != 0)
|
|
return error;
|
|
}
|
|
|
|
if (SCARG(uap, set) == NULL)
|
|
/* Just examine */
|
|
return 0;
|
|
|
|
if ((error = copyin(SCARG(uap, set), &sss, sizeof(sss))) != 0)
|
|
return error;
|
|
|
|
svr4_to_bsd_sigset(&sss, &bss);
|
|
|
|
(void) splhigh();
|
|
|
|
switch (SCARG(uap, how)) {
|
|
case SVR4_SIG_BLOCK:
|
|
p->p_sigmask |= bss & ~sigcantmask;
|
|
break;
|
|
|
|
case SVR4_SIG_UNBLOCK:
|
|
p->p_sigmask &= ~bss;
|
|
break;
|
|
|
|
case SVR4_SIG_SETMASK:
|
|
p->p_sigmask = bss & ~sigcantmask;
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
(void) spl0();
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
svr4_sys_sigpending(p, v, retval)
|
|
register struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct svr4_sys_sigpending_args /* {
|
|
syscallarg(int) what;
|
|
syscallarg(svr4_sigset_t *) mask;
|
|
} */ *uap = v;
|
|
sigset_t bss;
|
|
svr4_sigset_t sss;
|
|
|
|
switch (SCARG(uap, what)) {
|
|
case 1: /* sigpending */
|
|
if (SCARG(uap, mask) == NULL)
|
|
return 0;
|
|
bss = p->p_siglist & p->p_sigmask;
|
|
bsd_to_svr4_sigset(&bss, &sss);
|
|
break;
|
|
|
|
case 2: /* sigfillset */
|
|
svr4_sigfillset(&sss);
|
|
break;
|
|
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
return copyout(&sss, SCARG(uap, mask), sizeof(sss));
|
|
}
|
|
|
|
int
|
|
svr4_sys_sigsuspend(p, v, retval)
|
|
register struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct svr4_sys_sigsuspend_args /* {
|
|
syscallarg(svr4_sigset_t *) ss;
|
|
} */ *uap = v;
|
|
svr4_sigset_t sss;
|
|
sigset_t bss;
|
|
struct sys_sigsuspend_args sa;
|
|
int error;
|
|
|
|
if ((error = copyin(SCARG(uap, ss), &sss, sizeof(sss))) != 0)
|
|
return error;
|
|
|
|
svr4_to_bsd_sigset(&sss, &bss);
|
|
|
|
SCARG(&sa, mask) = bss;
|
|
return sys_sigsuspend(p, &sa, retval);
|
|
}
|
|
|
|
int
|
|
svr4_sys_kill(p, v, retval)
|
|
register struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct svr4_sys_kill_args /* {
|
|
syscallarg(int) pid;
|
|
syscallarg(int) signum;
|
|
} */ *uap = v;
|
|
struct sys_kill_args ka;
|
|
|
|
SCARG(&ka, pid) = SCARG(uap, pid);
|
|
SCARG(&ka, signum) = svr4_to_bsd_sig[SCARG(uap, signum)];
|
|
return sys_kill(p, &ka, retval);
|
|
}
|
|
|
|
int
|
|
svr4_sys_context(p, v, retval)
|
|
register struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct svr4_sys_context_args /* {
|
|
syscallarg(int) func;
|
|
syscallarg(struct svr4_ucontext *) uc;
|
|
} */ *uap = v;
|
|
struct svr4_ucontext uc;
|
|
int error;
|
|
*retval = 0;
|
|
|
|
switch (SCARG(uap, func)) {
|
|
case 0:
|
|
DPRINTF(("getcontext(%x)\n", SCARG(uap, uc)));
|
|
svr4_getcontext(p, &uc, p->p_sigmask,
|
|
p->p_sigacts->ps_sigstk.ss_flags & SS_ONSTACK);
|
|
return copyout(&uc, SCARG(uap, uc), sizeof(uc));
|
|
|
|
case 1:
|
|
DPRINTF(("setcontext(%x)\n", SCARG(uap, uc)));
|
|
if ((error = copyin(SCARG(uap, uc), &uc, sizeof(uc))) != 0)
|
|
return error;
|
|
return svr4_setcontext(p, &uc);
|
|
|
|
default:
|
|
DPRINTF(("context(%d, %x)\n", SCARG(uap, func),
|
|
SCARG(uap, uc)));
|
|
return ENOSYS;
|
|
}
|
|
return 0;
|
|
}
|