/* $NetBSD: svr4_32_signal.c,v 1.28.10.2 2017/08/09 13:03:18 martin Exp $ */ /*- * Copyright (c) 1994, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas and by Charles M. Hannum. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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 __KERNEL_RCSID(0, "$NetBSD: svr4_32_signal.c,v 1.28.10.2 2017/08/09 13:03:18 martin Exp $"); #if defined(_KERNEL_OPT) #include "opt_compat_svr4.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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)) static inline void svr4_32_sigfillset(svr4_32_sigset_t *); void svr4_32_to_native_sigaction(const struct svr4_32_sigaction *, struct sigaction *); void native_to_svr4_32_sigaction(const struct sigaction *, struct svr4_32_sigaction *); #ifndef COMPAT_SVR4 const int native_to_svr4_signo[NSIG] = { 0, /* 0 */ SVR4_SIGHUP, /* 1 */ SVR4_SIGINT, /* 2 */ SVR4_SIGQUIT, /* 3 */ SVR4_SIGILL, /* 4 */ SVR4_SIGTRAP, /* 5 */ SVR4_SIGABRT, /* 6 */ SVR4_SIGEMT, /* 7 */ SVR4_SIGFPE, /* 8 */ SVR4_SIGKILL, /* 9 */ SVR4_SIGBUS, /* 10 */ SVR4_SIGSEGV, /* 11 */ SVR4_SIGSYS, /* 12 */ SVR4_SIGPIPE, /* 13 */ SVR4_SIGALRM, /* 14 */ SVR4_SIGTERM, /* 15 */ SVR4_SIGURG, /* 16 */ SVR4_SIGSTOP, /* 17 */ SVR4_SIGTSTP, /* 18 */ SVR4_SIGCONT, /* 19 */ SVR4_SIGCHLD, /* 20 */ SVR4_SIGTTIN, /* 21 */ SVR4_SIGTTOU, /* 22 */ SVR4_SIGIO, /* 23 */ SVR4_SIGXCPU, /* 24 */ SVR4_SIGXFSZ, /* 25 */ SVR4_SIGVTALRM, /* 26 */ SVR4_SIGPROF, /* 27 */ SVR4_SIGWINCH, /* 28 */ 0, /* 29 SIGINFO */ SVR4_SIGUSR1, /* 30 */ SVR4_SIGUSR2, /* 31 */ SVR4_SIGPWR, /* 32 */ SVR4_SIGRTMIN + 0, /* 33 */ SVR4_SIGRTMIN + 1, /* 34 */ SVR4_SIGRTMIN + 2, /* 35 */ SVR4_SIGRTMIN + 3, /* 36 */ SVR4_SIGRTMIN + 4, /* 37 */ SVR4_SIGRTMIN + 5, /* 38 */ SVR4_SIGRTMIN + 6, /* 39 */ SVR4_SIGRTMIN + 7, /* 40 */ SVR4_SIGRTMIN + 8, /* 41 */ SVR4_SIGRTMIN + 9, /* 42 */ SVR4_SIGRTMIN + 10, /* 43 */ SVR4_SIGRTMIN + 11, /* 44 */ SVR4_SIGRTMIN + 12, /* 45 */ SVR4_SIGRTMIN + 13, /* 46 */ SVR4_SIGRTMIN + 14, /* 47 */ SVR4_SIGRTMIN + 15, /* 48 */ SVR4_SIGRTMIN + 16, /* 49 */ SVR4_SIGRTMIN + 17, /* 50 */ SVR4_SIGRTMIN + 18, /* 51 */ SVR4_SIGRTMIN + 19, /* 52 */ SVR4_SIGRTMIN + 20, /* 53 */ SVR4_SIGRTMIN + 21, /* 54 */ SVR4_SIGRTMIN + 22, /* 55 */ SVR4_SIGRTMIN + 23, /* 56 */ SVR4_SIGRTMIN + 24, /* 57 */ SVR4_SIGRTMIN + 25, /* 58 */ SVR4_SIGRTMIN + 26, /* 59 */ SVR4_SIGRTMIN + 27, /* 60 */ SVR4_SIGRTMIN + 28, /* 61 */ SVR4_SIGRTMIN + 29, /* 62 */ SVR4_SIGRTMIN + 30, /* 63 */ }; const int svr4_to_native_signo[SVR4_NSIG] = { 0, /* 0 */ SIGHUP, /* 1 */ SIGINT, /* 2 */ SIGQUIT, /* 3 */ SIGILL, /* 4 */ SIGTRAP, /* 5 */ SIGABRT, /* 6 */ SIGEMT, /* 7 */ SIGFPE, /* 8 */ SIGKILL, /* 9 */ SIGBUS, /* 10 */ SIGSEGV, /* 11 */ SIGSYS, /* 12 */ SIGPIPE, /* 13 */ SIGALRM, /* 14 */ SIGTERM, /* 15 */ SIGUSR1, /* 16 */ SIGUSR2, /* 17 */ SIGCHLD, /* 18 */ SIGPWR, /* 19 */ SIGWINCH, /* 20 */ SIGURG, /* 21 */ SIGIO, /* 22 */ SIGSTOP, /* 23 */ SIGTSTP, /* 24 */ SIGCONT, /* 25 */ SIGTTIN, /* 26 */ SIGTTOU, /* 27 */ SIGVTALRM, /* 28 */ SIGPROF, /* 29 */ SIGXCPU, /* 30 */ SIGXFSZ, /* 31 */ SIGRTMIN + 0, /* 32 */ SIGRTMIN + 1, /* 33 */ SIGRTMIN + 2, /* 34 */ SIGRTMIN + 3, /* 35 */ SIGRTMIN + 4, /* 36 */ SIGRTMIN + 5, /* 37 */ SIGRTMIN + 6, /* 38 */ SIGRTMIN + 7, /* 39 */ SIGRTMIN + 8, /* 40 */ SIGRTMIN + 9, /* 41 */ SIGRTMIN + 10, /* 42 */ SIGRTMIN + 11, /* 43 */ SIGRTMIN + 12, /* 44 */ SIGRTMIN + 13, /* 45 */ SIGRTMIN + 14, /* 46 */ SIGRTMIN + 15, /* 47 */ SIGRTMIN + 16, /* 48 */ SIGRTMIN + 17, /* 49 */ SIGRTMIN + 18, /* 50 */ SIGRTMIN + 19, /* 51 */ SIGRTMIN + 20, /* 52 */ SIGRTMIN + 21, /* 53 */ SIGRTMIN + 22, /* 54 */ SIGRTMIN + 23, /* 55 */ SIGRTMIN + 24, /* 56 */ SIGRTMIN + 25, /* 57 */ SIGRTMIN + 26, /* 58 */ SIGRTMIN + 27, /* 59 */ SIGRTMIN + 28, /* 60 */ SIGRTMIN + 29, /* 61 */ SIGRTMIN + 30, /* 62 */ 0, /* 63 */ }; #endif static int svr4_32_decode_signum(int signum, int *native_signo, int *sigcall) { if (SVR4_SIGNO(signum) >= SVR4_NSIG) return EINVAL; if (native_signo) *native_signo = svr4_to_native_signo[SVR4_SIGNO(signum)]; if (sigcall) *sigcall = SVR4_SIGCALL(signum); return 0; } static inline void svr4_32_sigfillset(svr4_32_sigset_t *s) { int i; svr4_sigemptyset(s); for (i = 1; i < SVR4_NSIG; i++) if (svr4_to_native_signo[i] != 0) svr4_sigaddset(s, i); } void svr4_32_to_native_sigset(const svr4_32_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_native_signo[i]; if (newsig) sigaddset(bss, newsig); } } } void native_to_svr4_32_sigset(const sigset_t *bss, svr4_32_sigset_t *sss) { int i, newsig; svr4_sigemptyset(sss); for (i = 1; i < NSIG; i++) { if (sigismember(bss, i)) { newsig = native_to_svr4_signo[i]; if (newsig) svr4_sigaddset(sss, newsig); } } } /* * XXX: Only a subset of the flags is currently implemented. */ void svr4_32_to_native_sigaction(const struct svr4_32_sigaction *ssa, struct sigaction *bsa) { bsa->sa_handler = NETBSD32PTR64(ssa->svr4_32_sa_handler); svr4_32_to_native_sigset(&ssa->svr4_32_sa_mask, &bsa->sa_mask); bsa->sa_flags = 0; if ((ssa->svr4_32_sa_flags & SVR4_SA_ONSTACK) != 0) bsa->sa_flags |= SA_ONSTACK; if ((ssa->svr4_32_sa_flags & SVR4_SA_RESETHAND) != 0) bsa->sa_flags |= SA_RESETHAND; if ((ssa->svr4_32_sa_flags & SVR4_SA_RESTART) != 0) bsa->sa_flags |= SA_RESTART; if ((ssa->svr4_32_sa_flags & SVR4_SA_SIGINFO) != 0) { DPRINTF(("svr4_to_native_sigaction: SA_SIGINFO ignored\n")); } if ((ssa->svr4_32_sa_flags & SVR4_SA_NODEFER) != 0) bsa->sa_flags |= SA_NODEFER; if ((ssa->svr4_32_sa_flags & SVR4_SA_NOCLDWAIT) != 0) bsa->sa_flags |= SA_NOCLDWAIT; if ((ssa->svr4_32_sa_flags & SVR4_SA_NOCLDSTOP) != 0) bsa->sa_flags |= SA_NOCLDSTOP; if ((ssa->svr4_32_sa_flags & ~SVR4_SA_ALLBITS) != 0) { DPRINTF(("svr4_32_to_native_sigaction: extra bits %x ignored\n", ssa->svr4_32_sa_flags & ~SVR4_SA_ALLBITS)); } } void native_to_svr4_32_sigaction(const struct sigaction *bsa, struct svr4_32_sigaction *ssa) { NETBSD32PTR32(ssa->svr4_32_sa_handler, bsa->sa_handler); native_to_svr4_32_sigset(&bsa->sa_mask, &ssa->svr4_32_sa_mask); ssa->svr4_32_sa_flags = 0; if ((bsa->sa_flags & SA_ONSTACK) != 0) ssa->svr4_32_sa_flags |= SVR4_SA_ONSTACK; if ((bsa->sa_flags & SA_RESETHAND) != 0) ssa->svr4_32_sa_flags |= SVR4_SA_RESETHAND; if ((bsa->sa_flags & SA_RESTART) != 0) ssa->svr4_32_sa_flags |= SVR4_SA_RESTART; if ((bsa->sa_flags & SA_NODEFER) != 0) ssa->svr4_32_sa_flags |= SVR4_SA_NODEFER; if ((bsa->sa_flags & SA_NOCLDSTOP) != 0) ssa->svr4_32_sa_flags |= SVR4_SA_NOCLDSTOP; } int svr4_32_sys_sigaction(struct lwp *l, const struct svr4_32_sys_sigaction_args *uap, register_t *retval) { /* { syscallarg(int) signum; syscallarg(const struct svr4_32_sigaction *) nsa; syscallarg(struct svr4_32_sigaction *) osa; } */ struct svr4_32_sigaction nssa, ossa; struct sigaction nbsa, obsa; int native_signo; int error; if (SCARG_P32(uap, nsa)) { error = copyin(SCARG_P32(uap, nsa), &nssa, sizeof(nssa)); if (error) return (error); svr4_32_to_native_sigaction(&nssa, &nbsa); } error = svr4_32_decode_signum(SCARG(uap, signum), &native_signo, NULL); if (error) return error; error = sigaction1(l, native_signo, SCARG_P32(uap, nsa) ? &nbsa : 0, SCARG_P32(uap, osa) ? &obsa : 0, NULL, 0); if (error) return (error); if (SCARG_P32(uap, osa)) { native_to_svr4_32_sigaction(&obsa, &ossa); error = copyout(&ossa, SCARG_P32(uap, osa), sizeof(ossa)); if (error) return (error); } return (0); } int svr4_32_sys_sigaltstack(struct lwp *l, const struct svr4_32_sys_sigaltstack_args *uap, register_t *retval) { /* { syscallarg(const struct svr4_32_sigaltstack_tp) nss; syscallarg(struct svr4_32_sigaltstack_tp) oss; } */ compat_sigaltstack(uap, svr4_32_sigaltstack, SVR4_SS_ONSTACK, SVR4_SS_DISABLE); } /* * Stolen from the ibcs2 one */ int svr4_32_sys_signal(struct lwp *l, const struct svr4_32_sys_signal_args *uap, register_t *retval) { /* { syscallarg(int) signum; syscallarg(svr4_32_sig_t) handler; } */ struct proc *p = l->l_proc; int native_signo, sigcall; struct sigaction nbsa, obsa; sigset_t ss; int error; error = svr4_32_decode_signum(SCARG(uap, signum), &native_signo, &sigcall); if (error) return error; switch (sigcall) { case SVR4_SIGDEFER_MASK: if (SCARG(uap, handler) == SVR4_SIG_HOLD) goto sighold; /* FALLTHROUGH */ case SVR4_SIGNAL_MASK: nbsa.sa_handler = (sig_t)SCARG(uap, handler); sigemptyset(&nbsa.sa_mask); nbsa.sa_flags = 0; error = sigaction1(l, native_signo, &nbsa, &obsa, NULL, 0); if (error) return error; *retval = (u_int)(u_long)obsa.sa_handler; return 0; case SVR4_SIGHOLD_MASK: sighold: sigemptyset(&ss); sigaddset(&ss, native_signo); mutex_enter(p->p_lock); error = sigprocmask1(l, SIG_BLOCK, &ss, 0); mutex_exit(p->p_lock); return error; case SVR4_SIGRELSE_MASK: sigemptyset(&ss); sigaddset(&ss, native_signo); mutex_enter(p->p_lock); error = sigprocmask1(l, SIG_UNBLOCK, &ss, 0); mutex_exit(p->p_lock); return error; case SVR4_SIGIGNORE_MASK: nbsa.sa_handler = SIG_IGN; sigemptyset(&nbsa.sa_mask); nbsa.sa_flags = 0; return sigaction1(l, native_signo, &nbsa, 0, NULL, 0); case SVR4_SIGPAUSE_MASK: mutex_enter(p->p_lock); ss = l->l_sigmask; mutex_exit(p->p_lock); sigdelset(&ss, native_signo); return sigsuspend1(l, &ss); default: return ENOSYS; } } int svr4_32_sys_sigprocmask(struct lwp *l, const struct svr4_32_sys_sigprocmask_args *uap, register_t *retval) { /* { syscallarg(int) how; syscallarg(const svr4_32_sigset_t *) set; syscallarg(svr4_32_sigset_t *) oset; } */ struct proc *p = l->l_proc; svr4_32_sigset_t nsss, osss; sigset_t nbss, obss; int how; int error; /* * Initialize how to 0 to avoid a compiler warning. Note that * this is safe because of the check in the default: case. */ how = 0; switch (SCARG(uap, how)) { case SVR4_SIG_BLOCK: how = SIG_BLOCK; break; case SVR4_SIG_UNBLOCK: how = SIG_UNBLOCK; break; case SVR4_SIG_SETMASK: how = SIG_SETMASK; break; default: if (SCARG_P32(uap, set)) return EINVAL; break; } if (SCARG_P32(uap, set)) { error = copyin(SCARG_P32(uap, set), &nsss, sizeof(nsss)); if (error) return error; svr4_32_to_native_sigset(&nsss, &nbss); } mutex_enter(p->p_lock); error = sigprocmask1(l, how, SCARG_P32(uap, set) ? &nbss : NULL, SCARG_P32(uap, oset) ? &obss : NULL); mutex_exit(p->p_lock); if (error) return error; if (SCARG_P32(uap, oset)) { native_to_svr4_32_sigset(&obss, &osss); error = copyout(&osss, SCARG_P32(uap, oset), sizeof(osss)); if (error) return error; } return 0; } int svr4_32_sys_sigpending(struct lwp *l, const struct svr4_32_sys_sigpending_args *uap, register_t *retval) { /* { syscallarg(int) what; syscallarg(svr4_sigset_t *) set; } */ sigset_t bss; svr4_32_sigset_t sss; switch (SCARG(uap, what)) { case 1: /* sigpending */ sigpending1(l, &bss); native_to_svr4_32_sigset(&bss, &sss); break; case 2: /* sigfillset */ svr4_32_sigfillset(&sss); break; default: return (EINVAL); } return (copyout(&sss, SCARG_P32(uap, set), sizeof(sss))); } int svr4_32_sys_sigsuspend(struct lwp *l, const struct svr4_32_sys_sigsuspend_args *uap, register_t *retval) { /* { syscallarg(const svr4_32_sigset_t *) set; } */ svr4_32_sigset_t sss; sigset_t bss; int error; if (SCARG_P32(uap, set)) { error = copyin(SCARG_P32(uap, set), &sss, sizeof(sss)); if (error) return (error); svr4_32_to_native_sigset(&sss, &bss); } return (sigsuspend1(l, SCARG_P32(uap, set) ? &bss : 0)); } int svr4_32_sys_pause(struct lwp *l, const void *v, register_t *retval) { return (sigsuspend1(l, 0)); } int svr4_32_sys_kill(struct lwp *l, const struct svr4_32_sys_kill_args *uap, register_t *retval) { /* { syscallarg(int) pid; syscallarg(int) signum; } */ struct sys_kill_args ka; int native_signo; int error; error = svr4_32_decode_signum(SCARG(uap, signum), &native_signo, NULL); if (error) return error; SCARG(&ka, pid) = SCARG(uap, pid); SCARG(&ka, signum) = native_signo; return sys_kill(l, &ka, retval); } void svr4_32_getcontext(struct lwp *l, struct svr4_32_ucontext *uc, const sigset_t *mask) { void *sp; struct svr4_32_sigaltstack *ss = &uc->uc_stack; memset(uc, 0, sizeof(*uc)); /* get machine context */ sp = svr4_32_getmcontext(l, &uc->uc_mcontext, &uc->uc_flags); /* get link */ NETBSD32PTR32(uc->uc_link, l->l_ctxlink); /* get stack state. XXX: solaris appears to do this */ #if 0 svr4_32_to_native_sigaltstack(&uc->uc_stack, &p->p_sigacts->ps_sigstk); #else NETBSD32PTR32(ss->ss_sp, (void *)(((u_long) sp) & ~(16384 - 1))); ss->ss_size = 16384; ss->ss_flags = 0; #endif /* get signal mask */ mutex_enter(l->l_proc->p_lock); native_to_svr4_32_sigset(mask, &uc->uc_sigmask); mutex_exit(l->l_proc->p_lock); uc->uc_flags |= SVR4_UC_STACK|SVR4_UC_SIGMASK; } int svr4_32_setcontext(struct lwp *l, struct svr4_32_ucontext *uc) { int error; struct proc *p = l->l_proc; /* set machine context */ if ((error = svr4_32_setmcontext(l, &uc->uc_mcontext, uc->uc_flags)) != 0) return error; /* set link */ l->l_ctxlink = NETBSD32PTR64(uc->uc_link); mutex_enter(p->p_lock); /* set signal stack */ if (uc->uc_flags & SVR4_UC_STACK) { l->l_sigstk.ss_sp = NETBSD32PTR64(uc->uc_stack.ss_sp); l->l_sigstk.ss_size = uc->uc_stack.ss_size; l->l_sigstk.ss_flags = (uc->uc_stack.ss_flags & SVR4_SS_ONSTACK ? SS_ONSTACK : 0) | (uc->uc_stack.ss_flags & SVR4_SS_DISABLE ? SS_DISABLE : 0); } /* set signal mask */ if (uc->uc_flags & SVR4_UC_SIGMASK) { sigset_t mask; svr4_32_to_native_sigset(&uc->uc_sigmask, &mask); (void)sigprocmask1(l, SIG_SETMASK, &mask, 0); } mutex_exit(p->p_lock); return EJUSTRETURN; } int svr4_32_sys_context(struct lwp *l, const struct svr4_32_sys_context_args *uap, register_t *retval) { /* { syscallarg(int) func; syscallarg(struct svr4_32_ucontext *) uc; } */ struct svr4_32_ucontext uc; int error; *retval = 0; switch (SCARG(uap, func)) { case SVR4_GETCONTEXT: DPRINTF(("getcontext(%p)\n", SCARG(uap, uc))); svr4_32_getcontext(l, &uc, &l->l_sigmask); return copyout(&uc, SCARG_P32(uap, uc), sizeof(uc)); case SVR4_SETCONTEXT: DPRINTF(("setcontext(%p)\n", SCARG(uap, uc))); if (!SCARG_P32(uap, uc)) exit1(l, 0, 0); else if ((error = copyin(SCARG_P32(uap, uc), &uc, sizeof(uc))) != 0) return error; else return svr4_32_setcontext(l, &uc); default: DPRINTF(("context(%d, %p)\n", SCARG(uap, func), SCARG(uap, uc))); return ENOSYS; } return 0; }