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      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 
     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