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