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
44__weak_alias(feraiseexcept,_feraiseexcept)
45#endif
46
47#include <stdio.h>
48
49int
50feraiseexcept(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