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  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  27  * Use is subject to license terms.
  28  */
  29 
  30 #pragma weak fex_get_handling = __fex_get_handling
  31 #pragma weak fex_set_handling = __fex_set_handling
  32 #pragma weak fex_getexcepthandler = __fex_getexcepthandler
  33 #pragma weak fex_setexcepthandler = __fex_setexcepthandler
  34 
  35 #include "fenv_synonyms.h"
  36 #include <fenv.h>
  37 #include <ucontext.h>
  38 #include <thread.h>
  39 #include "fex_handler.h"
  40 
  41 int fex_get_handling(int e)
  42 {
  43         struct fex_handler_data *thr_handlers;
  44         int                                             i;
  45 
  46         thr_handlers = __fex_get_thr_handlers();
  47         for (i = 0; i < FEX_NUM_EXC; i++)
  48                 if (e & (1 << i))
  49                         return thr_handlers[i].__mode;
  50         return FEX_NOHANDLER;
  51 }
  52 
  53 int fex_set_handling(int e, int mode, void (*handler)())
  54 {
  55         struct fex_handler_data *thr_handlers;
  56         int                                             i;
  57 
  58         if (e & ~((1 << FEX_NUM_EXC) - 1))
  59                 return 0;
  60         thr_handlers = __fex_get_thr_handlers();
  61         for (i = 0; i < FEX_NUM_EXC; i++) {
  62                 if (e & (1 << i)) {
  63                         thr_handlers[i].__mode = mode;
  64                         thr_handlers[i].__handler = handler;
  65                 }
  66         }
  67         __fex_update_te();
  68         return 1;
  69 }
  70 
  71 void fex_getexcepthandler(fex_handler_t *buf, int e)
  72 {
  73         struct fex_handler_data *thr_handlers;
  74         int                                             i;
  75 
  76         thr_handlers = __fex_get_thr_handlers();
  77         for (i = 0; i < FEX_NUM_EXC; i++)
  78                 if (e & (1 << i))
  79                         (*buf)[i] = thr_handlers[i];
  80 }
  81 
  82 void fex_setexcepthandler(const fex_handler_t *buf, int e)
  83 {
  84         struct fex_handler_data *thr_handlers;
  85         int                                             i;
  86 
  87         thr_handlers = __fex_get_thr_handlers();
  88         for (i = 0; i < FEX_NUM_EXC; i++)
  89                 if (e & (1 << i))
  90                         thr_handlers[i] = (*buf)[i];
  91         __fex_update_te();
  92 }