1 /* $NetBSD: compat_13_machdep.c,v 1.4 2002/09/25 22:21:18 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/signalvar.h> 37 #include <sys/kernel.h> 38 #include <sys/proc.h> 39 #include <sys/user.h> 40 #include <sys/mount.h> 41 #include <sys/syscallargs.h> 42 43 int 44 compat_13_sys_sigreturn(p, v, retval) 45 struct proc *p; 46 void *v; 47 register_t *retval; 48 { 49 struct compat_13_sys_sigreturn_args /* { 50 syscallarg(struct sigcontext13 *) sigcntxp; 51 } */ *uap = v; 52 struct sigcontext13 sc; 53 struct trapframe *tf; 54 int error; 55 sigset_t mask; 56 57 /* 58 * The trampoline hands us the context. 59 * It is unsafe to keep track of it ourselves, in the event that a 60 * program jumps out of a signal hander. 61 */ 62 if ((error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) != 0) 63 return (error); 64 65 /* Restore the register context. */ 66 tf = trapframe(p); 67 if ((sc.sc_frame.srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) 68 return (EINVAL); 69 *tf = sc.sc_frame; 70 71 /* Restore signal stack. */ 72 if (sc.sc_onstack & SS_ONSTACK) 73 p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; 74 else 75 p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK; 76 77 /* Restore signal mask. */ 78 native_sigset13_to_sigset(&sc.sc_mask, &mask); 79 (void) sigprocmask1(p, SIG_SETMASK, &mask, 0); 80 81 return (EJUSTRETURN); 82 } 83