sys_machdep.c

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    1 /*-
    2  * Copyright (c) 2001 Jake Burkholder.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/5.0/sys/sparc64/sparc64/sys_machdep.c 95744 2002-04-29 18:08:26Z jake $
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/malloc.h>
   32 #include <sys/proc.h>
   33 #include <sys/sysproto.h>
   34 
   35 #include <machine/utrap.h>
   36 #include <machine/sysarch.h>
   37 
   38 static int sparc_sigtramp_install(struct thread *td, char *args);
   39 static int sparc_utrap_install(struct thread *td, char *args);
   40 
   41 #ifndef _SYS_SYSPROTO_H_
   42 struct sysarch_args {
   43         int     op;
   44         char    *parms;
   45 };
   46 #endif
   47 
   48 int
   49 sysarch(struct thread *td, struct sysarch_args *uap)
   50 {
   51         int error;
   52 
   53         error = 0;
   54         switch (uap->op) {
   55         case SPARC_SIGTRAMP_INSTALL:
   56                 error = sparc_sigtramp_install(td, uap->parms);
   57                 break;
   58         case SPARC_UTRAP_INSTALL:
   59                 error = sparc_utrap_install(td, uap->parms);
   60                 break;
   61         default:
   62                 error = EINVAL;
   63                 break;
   64         }
   65         return (error);
   66 }
   67 
   68 static int
   69 sparc_sigtramp_install(struct thread *td, char *args)
   70 {
   71         struct sparc_sigtramp_install_args sia;
   72         struct proc *p;
   73         int error;
   74 
   75         p = td->td_proc;
   76         if ((error = copyin(args, &sia, sizeof(sia))) != 0)
   77                 return (error);
   78         if (sia.sia_old != NULL) {
   79                 if (suword(sia.sia_old, (long)p->p_md.md_sigtramp) != 0)
   80                         return (EFAULT);
   81         }
   82         p->p_md.md_sigtramp = sia.sia_new;
   83         return (0);
   84 }
   85 
   86 static int
   87 sparc_utrap_install(struct thread *td, char *args)
   88 {
   89         struct sparc_utrap_install_args uia;
   90         struct sparc_utrap_args ua;
   91         struct md_utrap *ut;
   92         int error;
   93         int i;
   94 
   95         ut = td->td_proc->p_md.md_utrap;
   96         if ((error = copyin(args, &uia, sizeof(uia))) != 0)
   97                 return (error);
   98         if (uia.num < 0 || uia.num > UT_MAX ||
   99             (uia.handlers == NULL && uia.num > 0))
  100                 return (EINVAL);
  101         for (i = 0; i < uia.num; i++) {
  102                 if ((error = copyin(&uia.handlers[i], &ua, sizeof(ua))) != 0)
  103                         return (error);
  104                 if (ua.type != UTH_NOCHANGE &&
  105                     (ua.type < 0 || ua.type >= UT_MAX))
  106                         return (EINVAL);
  107                 if (ua.old_deferred != NULL) {
  108                         if ((error = suword(ua.old_deferred, 0)) != 0)
  109                                 return (error);
  110                 }
  111                 if (ua.old_precise != NULL) {
  112                         error = suword(ua.old_precise,
  113                             ut != NULL ? (long)ut->ut_precise[ua.type] : 0);
  114                         if (error != 0)
  115                                 return (error);
  116                 }
  117                 if (ua.type != UTH_NOCHANGE) {
  118                         if (ut == NULL) {
  119                                 ut = malloc(sizeof *ut, M_SUBPROC,
  120                                     M_WAITOK | M_ZERO);
  121                                 ut->ut_refcnt = 1;
  122                                 td->td_proc->p_md.md_utrap = ut;
  123                         }
  124                         ut->ut_precise[ua.type] = ua.new_precise;
  125                 }
  126         }
  127         return (0);
  128 }

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FreeBSD/Linux Kernel Cross Reference sys/sparc64/sparc64/sys_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sparc64/sys_machdep.c