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.h>
36 #include <ucontext.h>
37 #include <thread.h>
38 #include "fex_handler.h"
39 
fex_get_handling(int e)40 int fex_get_handling(int e)
41 {
42 	struct fex_handler_data	*thr_handlers;
43 	int						i;
44 
45 	thr_handlers = __fex_get_thr_handlers();
46 	for (i = 0; i < FEX_NUM_EXC; i++)
47 		if (e & (1 << i))
48 			return thr_handlers[i].__mode;
49 	return FEX_NOHANDLER;
50 }
51 
fex_set_handling(int e,int mode,void (* handler)())52 int fex_set_handling(int e, int mode, void (*handler)())
53 {
54 	struct fex_handler_data	*thr_handlers;
55 	int						i;
56 
57 	if (e & ~((1 << FEX_NUM_EXC) - 1))
58 		return 0;
59 	thr_handlers = __fex_get_thr_handlers();
60 	for (i = 0; i < FEX_NUM_EXC; i++) {
61 		if (e & (1 << i)) {
62 			thr_handlers[i].__mode = mode;
63 			thr_handlers[i].__handler = handler;
64 		}
65 	}
66 	__fex_update_te();
67 	return 1;
68 }
69 
fex_getexcepthandler(fex_handler_t * buf,int e)70 void fex_getexcepthandler(fex_handler_t *buf, int e)
71 {
72 	struct fex_handler_data	*thr_handlers;
73 	int						i;
74 
75 	thr_handlers = __fex_get_thr_handlers();
76 	for (i = 0; i < FEX_NUM_EXC; i++)
77 		if (e & (1 << i))
78 			(*buf)[i] = thr_handlers[i];
79 }
80 
fex_setexcepthandler(const fex_handler_t * buf,int e)81 void fex_setexcepthandler(const fex_handler_t *buf, int e)
82 {
83 	struct fex_handler_data	*thr_handlers;
84 	int						i;
85 
86 	thr_handlers = __fex_get_thr_handlers();
87 	for (i = 0; i < FEX_NUM_EXC; i++)
88 		if (e & (1 << i))
89 			thr_handlers[i] = (*buf)[i];
90 	__fex_update_te();
91 }
92