1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24  */
  25 
  26 /*
  27  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 
  31 #pragma weak __fex_get_handling = fex_get_handling
  32 #pragma weak __fex_set_handling = fex_set_handling
  33 #pragma weak __fex_getexcepthandler = fex_getexcepthandler
  34 #pragma weak __fex_setexcepthandler = fex_setexcepthandler
  35 
  36 #include <fenv.h>
  37 #include <ucontext.h>
  38 #include <thread.h>
  39 #include "fex_handler.h"
  40 
  41 int
  42 fex_get_handling(int e)
  43 {
  44         struct fex_handler_data *thr_handlers;
  45         int i;
  46 
  47         thr_handlers = __fex_get_thr_handlers();
  48 
  49         for (i = 0; i < FEX_NUM_EXC; i++)
  50                 if (e & (1 << i))
  51                         return (thr_handlers[i].__mode);
  52 
  53         return (FEX_NOHANDLER);
  54 }
  55 
  56 int
  57 fex_set_handling(int e, int mode, void (*handler)())
  58 {
  59         struct fex_handler_data *thr_handlers;
  60         int i;
  61 
  62         if (e & ~((1 << FEX_NUM_EXC) - 1))
  63                 return (0);
  64 
  65         thr_handlers = __fex_get_thr_handlers();
  66 
  67         for (i = 0; i < FEX_NUM_EXC; i++) {
  68                 if (e & (1 << i)) {
  69                         thr_handlers[i].__mode = mode;
  70                         thr_handlers[i].__handler = handler;
  71                 }
  72         }
  73 
  74         __fex_update_te();
  75         return (1);
  76 }
  77 
  78 void
  79 fex_getexcepthandler(fex_handler_t *buf, int e)
  80 {
  81         struct fex_handler_data *thr_handlers;
  82         int i;
  83 
  84         thr_handlers = __fex_get_thr_handlers();
  85 
  86         for (i = 0; i < FEX_NUM_EXC; i++)
  87                 if (e & (1 << i))
  88                         (*buf)[i] = thr_handlers[i];
  89 }
  90 
  91 void
  92 fex_setexcepthandler(const fex_handler_t *buf, int e)
  93 {
  94         struct fex_handler_data *thr_handlers;
  95         int i;
  96 
  97         thr_handlers = __fex_get_thr_handlers();
  98 
  99         for (i = 0; i < FEX_NUM_EXC; i++)
 100                 if (e & (1 << i))
 101                         thr_handlers[i] = (*buf)[i];
 102 
 103         __fex_update_te();
 104 }