common/lib/libc/arch/arm/gen/__aeabi_idiv0.c

   1 /*-
   2  * Copyright (c) 2012 The NetBSD Foundation, Inc.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to The NetBSD Foundation
   6  * by Matt Thomas of 3am Software Foundry.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31
  32 __RCSID("$NetBSD: __aeabi_idiv0.c,v 1.3 2014/01/29 22:29:43 joerg Exp $");
  33
  34 #if defined(_KERNEL) || defined(_STANDALONE)
  35 #include <sys/systm.h>
  36 #else
  37 #include <string.h>
  38 #include <unistd.h>
  39 #include <sys/types.h>
  40 #include <sys/signal.h>
  41 #include <sys/siginfo.h>
  42 #endif
  43
  44 #include <arm/aeabi.h>
  45
  46 int
  47 __aeabi_idiv0(int result)
  48 {
  49 #if defined(_KERNEL) || defined(_STANDALONE)
  50         panic("divide by 0");
  51 #else
  52 #if !defined(__minix) /* LSC: No sigqueueinfo on Minix. */
  53         siginfo_t info;
  54
  55         memset(&info, 0, sizeof info);
  56         info.si_signo = SIGFPE;
  57         info.si_pid = getpid();
  58         info.si_uid = geteuid();
  59         info.si_code = FPE_INTDIV;
  60         sigqueueinfo(getpid(), &info);
  61 #else
  62         /* LSC: So just trigger the signal. */
  63         raise(SIGFPE);
  64 #endif /* !defined(__minix) */
  65 #endif
  66         return result;
  67 }