/* $NetBSD: compat_16_machdep.c,v 1.5 2018/12/29 11:30:12 maxv Exp $ */ /* * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. * All rights reserved. * * Changed for the VAX port (and for readability) /IC * * This code is derived from software contributed to Berkeley by the Systems * Programming Group of the University of Utah Computer Science Department. * * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * from: Utah Hdr: machdep.c 1.63 91/04/24 * * @(#)machdep.c 7.16 (Berkeley) 6/3/91 */ /* * Copyright (c) 2002, Hugh Graham. * Copyright (c) 1994, 1998 Ludd, University of Lule}, Sweden. * Copyright (c) 1993 Adam Glass * Copyright (c) 1988 University of Utah. * * Changed for the VAX port (and for readability) /IC * * This code is derived from software contributed to Berkeley by the Systems * Programming Group of the University of Utah Computer Science Department. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * from: Utah Hdr: machdep.c 1.63 91/04/24 * * @(#)machdep.c 7.16 (Berkeley) 6/3/91 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: compat_16_machdep.c,v 1.5 2018/12/29 11:30:12 maxv Exp $"); #ifdef _KERNEL_OPT #include "opt_ddb.h" #include "opt_compat_netbsd.h" #include "opt_compat_ultrix.h" #include "opt_multiprocessor.h" #include "opt_lockdebug.h" #endif #include <sys/param.h> #include <sys/systm.h> #include <sys/cpu.h> #include <sys/device.h> #include <sys/proc.h> #include <sys/signal.h> #include <sys/syscallargs.h> #include <sys/sysctl.h> #include <sys/time.h> #include <dev/cons.h> #include <machine/macros.h> #include <machine/reg.h> #include <vax/vax/gencons.h> /* * This code was moved here from sys/arch/vax/vax/sig_machdep.c */ int compat_16_sys___sigreturn14(struct lwp *l, const struct compat_16_sys___sigreturn14_args *uap, register_t *retval) { /* { syscallarg(struct sigcontext *) sigcntxp; } */ struct proc * const p = l->l_proc; struct trapframe * const tf = l->l_md.md_utf; struct sigcontext * const ucntx = SCARG(uap, sigcntxp); struct sigcontext ksc; if (copyin((void *)ucntx, (void *)&ksc, sizeof(struct sigcontext))) return EINVAL; /* Compatibility mode? */ if ((ksc.sc_ps & (PSL_IPL | PSL_IS)) || ((ksc.sc_ps & (PSL_U | PSL_PREVU)) != (PSL_U | PSL_PREVU)) || (ksc.sc_ps & PSL_CM)) { return (EINVAL); } mutex_enter(p->p_lock); if (ksc.sc_onstack & SS_ONSTACK) l->l_sigstk.ss_flags |= SS_ONSTACK; else l->l_sigstk.ss_flags &= ~SS_ONSTACK; /* Restore signal mask. */ (void) sigprocmask1(l, SIG_SETMASK, &ksc.sc_mask, 0); mutex_exit(p->p_lock); tf->tf_fp = ksc.sc_fp; tf->tf_ap = ksc.sc_ap; tf->tf_pc = ksc.sc_pc; tf->tf_sp = ksc.sc_sp; tf->tf_psl = ksc.sc_ps; return (EJUSTRETURN); } /* * Brief description of how sendsig() works: * A struct sigcontext is allocated on the user stack. The relevant * registers are saved in it. Below it is a struct trampframe constructed, it * is actually an argument list for callg. The user * stack pointer is put below all structs. * * The registers will contain when the signal handler is called: * pc, psl - Obvious * sp - An address below all structs * fp - The address of the signal handler * ap - The address to the callg frame * * The trampoline code will save r0-r5 before doing anything else. */ vaddr_t setupstack_sigcontext2(const struct ksiginfo *ksi, const sigset_t *mask, int vers, struct lwp *l, struct trapframe *tf, vaddr_t sp, int onstack, vaddr_t handler) { struct trampoline2 tramp; struct sigcontext sigctx; struct proc * const p = l->l_proc; bool error; /* The sigcontext struct will be passed back to sigreturn(). */ sigctx.sc_pc = tf->tf_pc; sigctx.sc_ps = tf->tf_psl; sigctx.sc_ap = tf->tf_ap; sigctx.sc_fp = tf->tf_fp; sigctx.sc_sp = tf->tf_sp; sigctx.sc_onstack = onstack ? SS_ONSTACK : 0; sigctx.sc_mask = *mask; sp -= sizeof(struct sigcontext); /* Arguments given to the signal handler. */ tramp.narg = 3; tramp.sig = ksi->ksi_signo; tramp.code = (register_t)ksi->ksi_addr; tramp.scp = sp; sp -= sizeof(tramp); sendsig_reset(l, ksi->ksi_signo); mutex_exit(p->p_lock); /* Store the handler in the trapframe. */ tf->tf_fp = handler; /* Copy out the sigcontext and trampoline. */ error = (copyout(&sigctx, (char *)tramp.scp, sizeof(sigctx)) != 0 || copyout(&tramp, (char *)sp, sizeof(tramp)) != 0); mutex_enter(p->p_lock); if (error) return 0; /* return updated stack pointer */ return sp; }
