/*- * Copyright (c) 1994-1995 Søren Schmidt * 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 * in this position and unchanged. * 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 withough 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. * * $Id: linux_signal.c,v 1.15 1999/05/06 18:44:26 peter Exp $ */ #include #include #include #include #include #include #include #include static sigset_t linux_to_bsd_sigset(linux_sigset_t mask) { int b, l; sigset_t new = 0; for (l = 1; l < LINUX_NSIG; l++) { if (mask & (1 << (l - 1))) { if ((b = linux_to_bsd_signal[l])) new |= (1 << (b - 1)); } } return new; } static linux_sigset_t bsd_to_linux_sigset(sigset_t mask) { int b, l; sigset_t new = 0; for (b = 1; b < NSIG; b++) { if (mask & (1 << (b - 1))) { if ((l = bsd_to_linux_signal[b])) new |= (1 << (l - 1)); } } return new; } static void linux_to_bsd_sigaction(linux_sigaction_t *lsa, struct sigaction *bsa) { bsa->sa_mask = linux_to_bsd_sigset(lsa->lsa_mask); bsa->sa_handler = lsa->lsa_handler; bsa->sa_flags = 0; if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP) bsa->sa_flags |= SA_NOCLDSTOP; if (lsa->lsa_flags & LINUX_SA_ONSTACK) bsa->sa_flags |= SA_ONSTACK; if (lsa->lsa_flags & LINUX_SA_RESTART) bsa->sa_flags |= SA_RESTART; if (lsa->lsa_flags & LINUX_SA_ONESHOT) bsa->sa_flags |= SA_RESETHAND; if (lsa->lsa_flags & LINUX_SA_NOMASK) bsa->sa_flags |= SA_NODEFER; } static void bsd_to_linux_sigaction(struct sigaction *bsa, linux_sigaction_t *lsa) { lsa->lsa_handler = bsa->sa_handler; lsa->lsa_restorer = NULL; /* unsupported */ lsa->lsa_mask = bsd_to_linux_sigset(bsa->sa_mask); lsa->lsa_flags = 0; if (bsa->sa_flags & SA_NOCLDSTOP) lsa->lsa_flags |= LINUX_SA_NOCLDSTOP; if (bsa->sa_flags & SA_ONSTACK) lsa->lsa_flags |= LINUX_SA_ONSTACK; if (bsa->sa_flags & SA_RESTART) lsa->lsa_flags |= LINUX_SA_RESTART; if (bsa->sa_flags & SA_RESETHAND) lsa->lsa_flags |= LINUX_SA_ONESHOT; if (bsa->sa_flags & SA_NODEFER) lsa->lsa_flags |= LINUX_SA_NOMASK; } int linux_sigaction(struct proc *p, struct linux_sigaction_args *args) { linux_sigaction_t linux_sa; struct sigaction *nsa = NULL, *osa = NULL, bsd_sa; struct sigaction_args sa; int error; caddr_t sg = stackgap_init(); #ifdef DEBUG printf("Linux-emul(%ld): sigaction(%d, %p, %p)\n", (long)p->p_pid, args->sig, (void *)args->nsa, (void *)args->osa); #endif if (args->sig <= 0 || args->sig >= LINUX_NSIG) return EINVAL; if (args->osa) osa = (struct sigaction *)stackgap_alloc(&sg, sizeof(struct sigaction)); if (args->nsa) { nsa = (struct sigaction *)stackgap_alloc(&sg, sizeof(struct sigaction)); error = copyin(args->nsa, &linux_sa, sizeof(linux_sigaction_t)); if (error) return error; linux_to_bsd_sigaction(&linux_sa, &bsd_sa); error = copyout(&bsd_sa, nsa, sizeof(struct sigaction)); if (error) return error; } sa.signum = linux_to_bsd_signal[args->sig]; sa.nsa = nsa; sa.osa = osa; error = sigaction(p, &sa); if (error) return error; if (args->osa) { error = copyin(osa, &bsd_sa, sizeof(struct sigaction)); if (error) return error; bsd_to_linux_sigaction(&bsd_sa, &linux_sa); error = copyout(&linux_sa, args->osa, sizeof(linux_sigaction_t)); if (error) return error; } return 0; } int linux_signal(struct proc *p, struct linux_signal_args *args) { caddr_t sg; struct sigaction_args sa_args; struct sigaction *osa, *nsa, tmpsa; int error; #ifdef DEBUG printf("Linux-emul(%ld): signal(%d, %p)\n", (long)p->p_pid, args->sig, (void *)args->handler); #endif if (args->sig <= 0 || args->sig >= LINUX_NSIG) return EINVAL; sg = stackgap_init(); nsa = stackgap_alloc(&sg, sizeof *nsa); osa = stackgap_alloc(&sg, sizeof *osa); tmpsa.sa_handler = args->handler; tmpsa.sa_mask = (sigset_t) 0; tmpsa.sa_flags = SA_RESETHAND | SA_NODEFER; if ((error = copyout(&tmpsa, nsa, sizeof tmpsa))) return error; sa_args.signum = linux_to_bsd_signal[args->sig]; sa_args.osa = osa; sa_args.nsa = nsa; if ((error = sigaction(p, &sa_args))) return error; if ((error = copyin(osa, &tmpsa, sizeof *osa))) return error; p->p_retval[0] = (int)tmpsa.sa_handler; return 0; } int linux_sigprocmask(struct proc *p, struct linux_sigprocmask_args *args) { int error, s; sigset_t mask; sigset_t omask; #ifdef DEBUG printf("Linux-emul(%d): sigprocmask(%d, *, *)\n", p->p_pid, args->how); #endif p->p_retval[0] = 0; if (args->omask != NULL) { omask = bsd_to_linux_sigset(p->p_sigmask); error = copyout(&omask, args->omask, sizeof(sigset_t)); if (error) return error; } if (!(args->mask)) return 0; error = copyin(args->mask, &mask, sizeof(linux_sigset_t)); if (error) return error; mask = linux_to_bsd_sigset(mask); s = splhigh(); switch (args->how) { case LINUX_SIG_BLOCK: p->p_sigmask |= (mask & ~sigcantmask); break; case LINUX_SIG_UNBLOCK: p->p_sigmask &= ~mask; break; case LINUX_SIG_SETMASK: p->p_sigmask = (mask & ~sigcantmask); break; default: error = EINVAL; break; } splx(s); return error; } int linux_siggetmask(struct proc *p, struct linux_siggetmask_args *args) { #ifdef DEBUG printf("Linux-emul(%d): siggetmask()\n", p->p_pid); #endif p->p_retval[0] = bsd_to_linux_sigset(p->p_sigmask); return 0; } int linux_sigsetmask(struct proc *p, struct linux_sigsetmask_args *args) { int s; sigset_t mask; #ifdef DEBUG printf("Linux-emul(%ld): sigsetmask(%08lx)\n", (long)p->p_pid, (unsigned long)args->mask); #endif p->p_retval[0] = bsd_to_linux_sigset(p->p_sigmask); mask = linux_to_bsd_sigset(args->mask); s = splhigh(); p->p_sigmask = mask & ~sigcantmask; splx(s); return 0; } int linux_sigpending(struct proc *p, struct linux_sigpending_args *args) { linux_sigset_t linux_sig; #ifdef DEBUG printf("Linux-emul(%d): sigpending(*)\n", p->p_pid); #endif linux_sig = bsd_to_linux_sigset(p->p_siglist & p->p_sigmask); return copyout(&linux_sig, args->mask, sizeof(linux_sig)); } /* * Linux has two extra args, restart and oldmask. We dont use these, * but it seems that "restart" is actually a context pointer that * enables the signal to happen with a different register set. */ int linux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args) { struct sigsuspend_args tmp; #ifdef DEBUG printf("Linux-emul(%ld): sigsuspend(%08lx)\n", (long)p->p_pid, (unsigned long)args->mask); #endif tmp.mask = linux_to_bsd_sigset(args->mask); return sigsuspend(p, &tmp); } int linux_pause(struct proc *p, struct linux_pause_args *args) { struct sigsuspend_args tmp; #ifdef DEBUG printf("Linux-emul(%d): pause()\n", p->p_pid); #endif tmp.mask = p->p_sigmask; return sigsuspend(p, &tmp); } int linux_kill(struct proc *p, struct linux_kill_args *args) { struct kill_args /* { int pid; int signum; } */ tmp; #ifdef DEBUG printf("Linux-emul(%d): kill(%d, %d)\n", p->p_pid, args->pid, args->signum); #endif if (args->signum < 0 || args->signum >= LINUX_NSIG) return EINVAL; tmp.pid = args->pid; tmp.signum = linux_to_bsd_signal[args->signum]; return kill(p, &tmp); }