Current Path : /sys/compat/svr4/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/compat/svr4/svr4_signal.c |
/*- * Copyright (c) 1998 Mark Newton * Copyright (c) 1994 Christos Zoulas * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/compat/svr4/svr4_signal.c 225617 2011-09-16 13:58:51Z kmacy $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/filedesc.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/proc.h> #include <sys/signal.h> #include <sys/signalvar.h> #include <sys/syscallsubr.h> #include <sys/sysproto.h> #include <machine/cpu.h> #include <compat/svr4/svr4.h> #include <compat/svr4/svr4_types.h> #include <compat/svr4/svr4_signal.h> #include <compat/svr4/svr4_proto.h> #include <compat/svr4/svr4_util.h> #include <compat/svr4/svr4_ucontext.h> #define svr4_sigmask(n) (1 << (((n) - 1) & 31)) #define svr4_sigword(n) (((n) - 1) >> 5) #define svr4_sigemptyset(s) memset((s), 0, sizeof(*(s))) #define svr4_sigismember(s, n) ((s)->bits[svr4_sigword(n)] & svr4_sigmask(n)) #define svr4_sigaddset(s, n) ((s)->bits[svr4_sigword(n)] |= svr4_sigmask(n)) void svr4_to_bsd_sigaction(const struct svr4_sigaction *, struct sigaction *); void bsd_to_svr4_sigaction(const struct sigaction *, struct svr4_sigaction *); void svr4_sigfillset(svr4_sigset_t *); int bsd_to_svr4_sig[SVR4_NSIG] = { 0, SVR4_SIGHUP, SVR4_SIGINT, SVR4_SIGQUIT, SVR4_SIGILL, SVR4_SIGTRAP, SVR4_SIGABRT, SVR4_SIGEMT, SVR4_SIGFPE, SVR4_SIGKILL, SVR4_SIGBUS, SVR4_SIGSEGV, SVR4_SIGSYS, SVR4_SIGPIPE, SVR4_SIGALRM, SVR4_SIGTERM, SVR4_SIGURG, SVR4_SIGSTOP, SVR4_SIGTSTP, SVR4_SIGCONT, SVR4_SIGCHLD, SVR4_SIGTTIN, SVR4_SIGTTOU, SVR4_SIGIO, SVR4_SIGXCPU, SVR4_SIGXFSZ, SVR4_SIGVTALRM, SVR4_SIGPROF, SVR4_SIGWINCH, 0, /* SIGINFO */ SVR4_SIGUSR1, SVR4_SIGUSR2, }; int svr4_to_bsd_sig[SVR4_NSIG] = { 0, SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGEMT, SIGFPE, SIGKILL, SIGBUS, SIGSEGV, SIGSYS, SIGPIPE, SIGALRM, SIGTERM, SIGUSR1, SIGUSR2, SIGCHLD, 0, /* XXX NetBSD uses SIGPWR here, but we don't seem to have one */ SIGWINCH, SIGURG, SIGIO, SIGSTOP, SIGTSTP, SIGCONT, SIGTTIN, SIGTTOU, SIGVTALRM, SIGPROF, SIGXCPU, SIGXFSZ, }; void svr4_sigfillset(s) svr4_sigset_t *s; { int i; svr4_sigemptyset(s); for (i = 1; i < SVR4_NSIG; i++) if (svr4_to_bsd_sig[i] != 0) svr4_sigaddset(s, i); } void svr4_to_bsd_sigset(sss, bss) const svr4_sigset_t *sss; sigset_t *bss; { int i, newsig; SIGEMPTYSET(*bss); for (i = 1; i < SVR4_NSIG; i++) if (svr4_sigismember(sss, i)) { newsig = svr4_to_bsd_sig[i]; if (newsig) SIGADDSET(*bss, newsig); } } void bsd_to_svr4_sigset(bss, sss) const sigset_t *bss; svr4_sigset_t *sss; { int i, newsig; svr4_sigemptyset(sss); for (i = 1; i < SVR4_NSIG; i++) { if (SIGISMEMBER(*bss, i)) { newsig = bsd_to_svr4_sig[i]; if (newsig) svr4_sigaddset(sss, newsig); } } } /* * XXX: Only a subset of the flags is currently implemented. */ void svr4_to_bsd_sigaction(ssa, bsa) const struct svr4_sigaction *ssa; struct sigaction *bsa; { bsa->sa_handler = (sig_t) ssa->ssa_handler; svr4_to_bsd_sigset(&ssa->ssa_mask, &bsa->sa_mask); bsa->sa_flags = 0; if ((ssa->ssa_flags & SVR4_SA_ONSTACK) != 0) bsa->sa_flags |= SA_ONSTACK; if ((ssa->ssa_flags & SVR4_SA_RESETHAND) != 0) bsa->sa_flags |= SA_RESETHAND; if ((ssa->ssa_flags & SVR4_SA_RESTART) != 0) bsa->sa_flags |= SA_RESTART; if ((ssa->ssa_flags & SVR4_SA_SIGINFO) != 0) DPRINTF(("svr4_to_bsd_sigaction: SA_SIGINFO ignored\n")); if ((ssa->ssa_flags & SVR4_SA_NOCLDSTOP) != 0) bsa->sa_flags |= SA_NOCLDSTOP; if ((ssa->ssa_flags & SVR4_SA_NODEFER) != 0) bsa->sa_flags |= SA_NODEFER; if ((ssa->ssa_flags & SVR4_SA_NOCLDWAIT) != 0) bsa->sa_flags |= SA_NOCLDWAIT; if ((ssa->ssa_flags & ~SVR4_SA_ALLBITS) != 0) DPRINTF(("svr4_to_bsd_sigaction: extra bits ignored\n")); } void bsd_to_svr4_sigaction(bsa, ssa) const struct sigaction *bsa; struct svr4_sigaction *ssa; { ssa->ssa_handler = (svr4_sig_t) bsa->sa_handler; bsd_to_svr4_sigset(&bsa->sa_mask, &ssa->ssa_mask); ssa->ssa_flags = 0; if ((bsa->sa_flags & SA_ONSTACK) != 0) ssa->ssa_flags |= SVR4_SA_ONSTACK; if ((bsa->sa_flags & SA_RESETHAND) != 0) ssa->ssa_flags |= SVR4_SA_RESETHAND; if ((bsa->sa_flags & SA_RESTART) != 0) ssa->ssa_flags |= SVR4_SA_RESTART; if ((bsa->sa_flags & SA_NODEFER) != 0) ssa->ssa_flags |= SVR4_SA_NODEFER; if ((bsa->sa_flags & SA_NOCLDSTOP) != 0) ssa->ssa_flags |= SVR4_SA_NOCLDSTOP; } void svr4_to_bsd_sigaltstack(sss, bss) const struct svr4_sigaltstack *sss; struct sigaltstack *bss; { bss->ss_sp = sss->ss_sp; bss->ss_size = sss->ss_size; bss->ss_flags = 0; if ((sss->ss_flags & SVR4_SS_DISABLE) != 0) bss->ss_flags |= SS_DISABLE; if ((sss->ss_flags & SVR4_SS_ONSTACK) != 0) bss->ss_flags |= SS_ONSTACK; if ((sss->ss_flags & ~SVR4_SS_ALLBITS) != 0) /*XXX*/ uprintf("svr4_to_bsd_sigaltstack: extra bits ignored\n"); } void bsd_to_svr4_sigaltstack(bss, sss) const struct sigaltstack *bss; struct svr4_sigaltstack *sss; { sss->ss_sp = bss->ss_sp; sss->ss_size = bss->ss_size; sss->ss_flags = 0; if ((bss->ss_flags & SS_DISABLE) != 0) sss->ss_flags |= SVR4_SS_DISABLE; if ((bss->ss_flags & SS_ONSTACK) != 0) sss->ss_flags |= SVR4_SS_ONSTACK; } int svr4_sys_sigaction(td, uap) struct thread *td; struct svr4_sys_sigaction_args *uap; { struct svr4_sigaction isa; struct sigaction nbsa, obsa; struct sigaction *nbsap; int error; if (uap->signum < 0 || uap->signum >= SVR4_NSIG) return (EINVAL); DPRINTF(("@@@ svr4_sys_sigaction(%d, %d, %d)\n", td->td_proc->p_pid, uap->signum, SVR4_SVR42BSD_SIG(uap->signum))); if (uap->nsa != NULL) { if ((error = copyin(uap->nsa, &isa, sizeof(isa))) != 0) return (error); svr4_to_bsd_sigaction(&isa, &nbsa); nbsap = &nbsa; } else nbsap = NULL; #if defined(DEBUG_SVR4) { int i; for (i = 0; i < 4; i++) DPRINTF(("\tssa_mask[%d] = %lx\n", i, isa.ssa_mask.bits[i])); DPRINTF(("\tssa_handler = %p\n", isa.ssa_handler)); } #endif error = kern_sigaction(td, SVR4_SVR42BSD_SIG(uap->signum), nbsap, &obsa, 0); if (error == 0 && uap->osa != NULL) { bsd_to_svr4_sigaction(&obsa, &isa); error = copyout(&isa, uap->osa, sizeof(isa)); } return (error); } int svr4_sys_sigaltstack(td, uap) struct thread *td; struct svr4_sys_sigaltstack_args *uap; { struct svr4_sigaltstack sss; struct sigaltstack nbss, obss, *nbssp; int error; if (uap->nss != NULL) { if ((error = copyin(uap->nss, &sss, sizeof(sss))) != 0) return (error); svr4_to_bsd_sigaltstack(&sss, &nbss); nbssp = &nbss; } else nbssp = NULL; error = kern_sigaltstack(td, nbssp, &obss); if (error == 0 && uap->oss != NULL) { bsd_to_svr4_sigaltstack(&obss, &sss); error = copyout(&sss, uap->oss, sizeof(sss)); } return (error); } /* * Stolen from the ibcs2 one */ int svr4_sys_signal(td, uap) struct thread *td; struct svr4_sys_signal_args *uap; { struct proc *p; int signum; int error; p = td->td_proc; DPRINTF(("@@@ svr4_sys_signal(%d)\n", p->p_pid)); signum = SVR4_SIGNO(uap->signum); if (signum < 0 || signum >= SVR4_NSIG) { if (SVR4_SIGCALL(uap->signum) == SVR4_SIGNAL_MASK || SVR4_SIGCALL(uap->signum) == SVR4_SIGDEFER_MASK) td->td_retval[0] = (int)SVR4_SIG_ERR; return (EINVAL); } signum = SVR4_SVR42BSD_SIG(signum); switch (SVR4_SIGCALL(uap->signum)) { case SVR4_SIGDEFER_MASK: if (uap->handler == SVR4_SIG_HOLD) goto sighold; /* FALLTHROUGH */ case SVR4_SIGNAL_MASK: { struct sigaction nbsa, obsa; nbsa.sa_handler = (sig_t) uap->handler; SIGEMPTYSET(nbsa.sa_mask); nbsa.sa_flags = 0; if (signum != SIGALRM) nbsa.sa_flags = SA_RESTART; error = kern_sigaction(td, signum, &nbsa, &obsa, 0); if (error != 0) { DPRINTF(("signal: sigaction failed: %d\n", error)); td->td_retval[0] = (int)SVR4_SIG_ERR; return (error); } td->td_retval[0] = (int)obsa.sa_handler; return (0); } case SVR4_SIGHOLD_MASK: sighold: { sigset_t set; SIGEMPTYSET(set); SIGADDSET(set, signum); return (kern_sigprocmask(td, SIG_BLOCK, &set, NULL, 0)); } case SVR4_SIGRELSE_MASK: { sigset_t set; SIGEMPTYSET(set); SIGADDSET(set, signum); return (kern_sigprocmask(td, SIG_UNBLOCK, &set, NULL, 0)); } case SVR4_SIGIGNORE_MASK: { struct sigaction sa; sa.sa_handler = SIG_IGN; SIGEMPTYSET(sa.sa_mask); sa.sa_flags = 0; error = kern_sigaction(td, signum, &sa, NULL, 0); if (error != 0) DPRINTF(("sigignore: sigaction failed\n")); return (error); } case SVR4_SIGPAUSE_MASK: { sigset_t mask; PROC_LOCK(p); mask = td->td_sigmask; PROC_UNLOCK(p); SIGDELSET(mask, signum); return kern_sigsuspend(td, mask); } default: return (ENOSYS); } } int svr4_sys_sigprocmask(td, uap) struct thread *td; struct svr4_sys_sigprocmask_args *uap; { svr4_sigset_t sss; sigset_t oss, nss; sigset_t *nssp; int error; if (uap->set != NULL) { if ((error = copyin(uap->set, &sss, sizeof(sss))) != 0) return error; svr4_to_bsd_sigset(&sss, &nss); nssp = &nss; } else nssp = NULL; /* SVR/4 sigprocmask flag values are the same as the FreeBSD values. */ error = kern_sigprocmask(td, uap->how, nssp, &oss, 0); if (error == 0 && uap->oset != NULL) { bsd_to_svr4_sigset(&oss, &sss); error = copyout(&sss, uap->oset, sizeof(sss)); } return (error); } int svr4_sys_sigpending(td, uap) struct thread *td; struct svr4_sys_sigpending_args *uap; { struct proc *p; sigset_t bss; svr4_sigset_t sss; p = td->td_proc; DPRINTF(("@@@ svr4_sys_sigpending(%d)\n", p->p_pid)); switch (uap->what) { case 1: /* sigpending */ if (uap->mask == NULL) return 0; PROC_LOCK(p); bss = p->p_siglist; SIGSETOR(bss, td->td_siglist); SIGSETAND(bss, td->td_sigmask); PROC_UNLOCK(p); bsd_to_svr4_sigset(&bss, &sss); break; case 2: /* sigfillset */ svr4_sigfillset(&sss); #if defined(DEBUG_SVR4) { int i; for (i = 0; i < 4; i++) DPRINTF(("new sigset[%d] = %lx\n", i, (long)sss.bits[i])); } #endif break; default: return EINVAL; } return copyout(&sss, uap->mask, sizeof(sss)); } int svr4_sys_sigsuspend(td, uap) struct thread *td; struct svr4_sys_sigsuspend_args *uap; { svr4_sigset_t sss; sigset_t bss; int error; if ((error = copyin(uap->ss, &sss, sizeof(sss))) != 0) return error; svr4_to_bsd_sigset(&sss, &bss); return kern_sigsuspend(td, bss); } int svr4_sys_kill(td, uap) struct thread *td; struct svr4_sys_kill_args *uap; { struct kill_args ka; if (uap->signum < 0 || uap->signum >= SVR4_NSIG) return (EINVAL); ka.pid = uap->pid; ka.signum = SVR4_SVR42BSD_SIG(uap->signum); return sys_kill(td, &ka); } int svr4_sys_context(td, uap) struct thread *td; struct svr4_sys_context_args *uap; { struct svr4_ucontext uc; int error, onstack; switch (uap->func) { case 0: DPRINTF(("getcontext(%p)\n", uap->uc)); PROC_LOCK(td->td_proc); onstack = sigonstack(cpu_getstack(td)); PROC_UNLOCK(td->td_proc); svr4_getcontext(td, &uc, &td->td_sigmask, onstack); return copyout(&uc, uap->uc, sizeof(uc)); case 1: DPRINTF(("setcontext(%p)\n", uap->uc)); if ((error = copyin(uap->uc, &uc, sizeof(uc))) != 0) return error; DPRINTF(("uc_flags = %lx\n", uc.uc_flags)); #if defined(DEBUG_SVR4) { int i; for (i = 0; i < 4; i++) DPRINTF(("uc_sigmask[%d] = %lx\n", i, uc.uc_sigmask.bits[i])); } #endif return svr4_setcontext(td, &uc); default: DPRINTF(("context(%d, %p)\n", uap->func, uap->uc)); return ENOSYS; } return 0; } int svr4_sys_pause(td, uap) struct thread *td; struct svr4_sys_pause_args *uap; { sigset_t mask; PROC_LOCK(td->td_proc); mask = td->td_sigmask; PROC_UNLOCK(td->td_proc); return kern_sigsuspend(td, mask); }