sys/arch/powerpc/powerpc/compat_13_machdep.c

   1 /*      $NetBSD: compat_13_machdep.c,v 1.16 2009/11/21 17:40:29 rmind 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/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: compat_13_machdep.c,v 1.16 2009/11/21 17:40:29 rmind Exp $");
  36
  37 #ifdef _KERNEL_OPT
  38 #include "opt_ppcarch.h"
  39 #endif
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/signalvar.h>
  44 #include <sys/kernel.h>
  45 #include <sys/proc.h>
  46 #include <sys/mount.h>
  47 #include <sys/syscallargs.h>
  48
  49 #include <uvm/uvm_extern.h>
  50
  51 #include <compat/sys/signal.h>
  52 #include <compat/sys/signalvar.h>
  53
  54 int
  55 compat_13_sys_sigreturn(struct lwp *l,
  56     const struct compat_13_sys_sigreturn_args *uap, register_t *retval)
  57 {
  58         /* {
  59                 syscallarg(struct sigcontext13 *) sigcntxp;
  60         } */
  61         struct proc *p = l->l_proc;
  62         struct sigcontext13 sc;
  63         struct trapframe *tf;
  64         int error;
  65         sigset_t mask;
  66
  67         /*
  68          * The trampoline hands us the context.
  69          * It is unsafe to keep track of it ourselves, in the event that a
  70          * program jumps out of a signal hander.
  71          */
  72         if ((error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) != 0)
  73                 return (error);
  74
  75         /* Restore the register context. */
  76         tf = trapframe(l);
  77         if (!PSL_USEROK_P(sc.sc_frame.srr1))
  78                 return (EINVAL);
  79
  80         /* Restore register context. */
  81         memcpy(tf->fixreg, sc.sc_frame.fixreg, sizeof(tf->fixreg));
  82         tf->lr   = sc.sc_frame.lr;
  83         tf->cr   = sc.sc_frame.cr;
  84         tf->xer  = sc.sc_frame.xer;
  85         tf->ctr  = sc.sc_frame.ctr;
  86         tf->srr0 = sc.sc_frame.srr0;
  87         tf->srr1 = sc.sc_frame.srr1;
  88 #ifdef PPC_OEA
  89         tf->tf_xtra[TF_VRSAVE] = sc.sc_frame.vrsave;
  90         tf->tf_xtra[TF_MQ] = sc.sc_frame.mq;
  91 #endif
  92
  93         mutex_enter(p->p_lock);
  94         /* Restore signal stack. */
  95         if (sc.sc_onstack & SS_ONSTACK)
  96                 l->l_sigstk.ss_flags |= SS_ONSTACK;
  97         else
  98                 l->l_sigstk.ss_flags &= ~SS_ONSTACK;
  99
 100         /* Restore signal mask. */
 101         native_sigset13_to_sigset(&sc.sc_mask, &mask);
 102         (void) sigprocmask1(l, SIG_SETMASK, &mask, 0);
 103         mutex_exit(p->p_lock);
 104
 105         return (EJUSTRETURN);
 106 }