1 /* $NetBSD: feraiseexcept.c,v 1.1 2017/03/22 23:11:09 chs Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: feraiseexcept.c,v 1.1 2017/03/22 23:11:09 chs Exp $");
34
35 #include "namespace.h"
36
37 #include <fenv.h>
38 #include <ieeefp.h>
39 #include <signal.h>
40 #include <string.h>
41 #include <unistd.h>
42
43 #ifdef __weak_alias
__weak_alias(feraiseexcept,_feraiseexcept)44 __weak_alias(feraiseexcept,_feraiseexcept)
45 #endif
46
47 #include <stdio.h>
48
49 int
50 feraiseexcept(int excepts)
51 {
52
53 fpsetsticky(fpgetsticky() | __FPE(excepts));
54 excepts &= __FEE(fpgetmask());
55 if (excepts) {
56 siginfo_t info;
57 memset(&info, 0, sizeof info);
58 info.si_signo = SIGFPE;
59 info.si_pid = getpid();
60 info.si_uid = geteuid();
61 if (excepts & FE_UNDERFLOW)
62 info.si_code = FPE_FLTUND;
63 else if (excepts & FE_OVERFLOW)
64 info.si_code = FPE_FLTOVF;
65 else if (excepts & FE_DIVBYZERO)
66 info.si_code = FPE_FLTDIV;
67 else if (excepts & FE_INVALID)
68 info.si_code = FPE_FLTINV;
69 else if (excepts & FE_INEXACT)
70 info.si_code = FPE_FLTRES;
71 sigqueueinfo(getpid(), &info);
72 }
73 return 0;
74 }
75