113 lines
3.9 KiB
C
113 lines
3.9 KiB
C
/* $NetBSD: compat_13_machdep.c,v 1.1 1998/09/13 20:33:33 pk Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opt_compat_netbsd.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/syscallargs.h>
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/*
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* System call to cleanup state after a signal
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* has been taken. Reset signal mask and
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* stack state from context left by sendsig (above),
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* and return to the given trap frame (if there is one).
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* Check carefully to make sure that the user has not
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* modified the state to gain improper privileges or to cause
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* a machine fault.
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*/
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/* ARGSUSED */
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int
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compat_13_sys_sigreturn(p, v, retval)
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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 compat_13_sys_sigreturn_args /* {
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syscallarg(struct sigcontext13 *) sigcntxp;
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} */ *uap = v;
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struct sigcontext13 sc, *scp;
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sigset_t mask;
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struct trapframe *tf;
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int error;
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/* First ensure consistent stack state (see sendsig). */
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write_user_windows();
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if (rwindow_save(p))
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sigexit(p, SIGILL);
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if ((error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) != 0)
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return (error);
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scp = ≻
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tf = p->p_md.md_tf;
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/*
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* Only the icc bits in the psr are used, so it need not be
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* verified. pc and npc must be multiples of 4. This is all
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* that is required; if it holds, just do it.
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*/
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if (((scp->sc_pc | scp->sc_npc) & 3) != 0)
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return (EINVAL);
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/* take only psr ICC field */
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tf->tf_psr = (tf->tf_psr & ~PSR_ICC) | (scp->sc_psr & PSR_ICC);
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tf->tf_pc = scp->sc_pc;
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tf->tf_npc = scp->sc_npc;
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tf->tf_global[1] = scp->sc_g1;
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tf->tf_out[0] = scp->sc_o0;
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tf->tf_out[6] = scp->sc_sp;
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if (scp->sc_onstack & SS_ONSTACK)
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p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
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else
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p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
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/* Restore signal mask */
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native_sigset13_to_sigset(&scp->sc_mask, &mask);
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(void) sigprocmask1(p, SIG_SETMASK, &mask, 0);
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return (EJUSTRETURN);
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}
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