sysdeps/mach/hurd/mips/exc2signal.c

   1 /* Translate Mach exception codes into signal numbers.  MIPS version.
   2 Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
   3 This file is part of the GNU C Library.
   4
   5 The GNU C Library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 License, or (at your option) any later version.
   9
  10 The GNU C Library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #include <hurd.h>
  21 #include <hurd/signal.h>
  22 #include <mach/exception.h>
  23
  24 /* Translate the Mach exception codes, as received in an `exception_raise' RPC,
  25    into a signal number and signal subcode.  */
  26
  27 void
  28 _hurd_exception2signal (int exception, int code, int subcode,
  29                         int *signo, long int *sigcode, int *error)
  30 {
  31   *error = 0;
  32
  33   switch (exception)
  34     {
  35     default:
  36       *signo = SIGIOT;
  37       *sigcode = exception;
  38       break;
  39
  40     case EXC_BAD_ACCESS:
  41       if (code == KERN_PROTECTION_FAILURE)
  42         *signo = SIGSEGV;
  43       else
  44         *signo = SIGBUS;
  45       *sigcode = subcode;
  46       *error = code;
  47       break;
  48
  49     case EXC_BAD_INSTRUCTION:
  50       *signo = SIGILL;
  51       if (code == EXC_MIPS_II)
  52         *sigcode = code;
  53       else
  54         *sigcode = 0;
  55       break;
  56
  57     case EXC_ARITHMETIC:
  58       switch (code)
  59         {
  60         case EXC_MIPS_OV:       /* integer overflow */
  61           *signo = SIGFPE;
  62           *sigcode = EXC_MIPS_FLT_OVERFLOW;
  63           break;
  64
  65         default:
  66           *signo = SIGFPE;
  67           *sigcode = 0;
  68           break;
  69
  70         case EXC_MIPS_INT:
  71           /* Subcode is the fp_status word saved by the hardware.
  72              Give an error code corresponding to the first bit set.  */
  73           if (subcode == EXC_MIPS_FLT_UNIMP)
  74             *signo = SIGILL;
  75           else
  76             *signo = SIGFPE;
  77           *sigcode = subcode;
  78           break;
  79         }
  80       break;
  81
  82     case EXC_EMULATION:
  83       /* 3.0 doesn't give this one, why, I don't know.  */
  84       *signo = SIGEMT;
  85       *sigcode = 0;
  86       break;
  87
  88     case EXC_SOFTWARE:
  89       *signo = SIGEMT;
  90       *sigcode = 0;
  91       break;
  92
  93     case EXC_BREAKPOINT:
  94       *signo = SIGTRAP;
  95       *sigcode = code;
  96       break;
  97     }
  98 }