hurd/exc2signal.c

   1 /* Translate Mach exception codes into signal numbers.  Stub version.
   2    Copyright (C) 1991-2017 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <hurd.h>
  20 #include <hurd/signal.h>
  21
  22 /* This file must be modified with machine-dependent details.  */
  23 #error "need to write sysdeps/mach/hurd/MACHINE/exc2signal.c"
  24
  25 /* Translate the Mach exception codes, as received in an `exception_raise' RPC,
  26    into a signal number and signal subcode.  */
  27
  28 void
  29 _hurd_exception2signal (struct hurd_signal_detail *detail, int *signo)
  30 {
  31   detail->error = 0;
  32
  33   switch (detail->exc)
  34     {
  35     default:
  36       *signo = SIGIOT;
  37       detail->code = detail->exc;
  38       break;
  39
  40     case EXC_BAD_ACCESS:
  41       if (detail->exc_code == KERN_PROTECTION_FAILURE)
  42         *signo = SIGSEGV;
  43       else
  44         *signo = SIGBUS;
  45       detail->code = detail->exc_subcode;
  46       detail->error = detail->exc_code;
  47       break;
  48
  49     case EXC_BAD_INSTRUCTION:
  50       *signo = SIGILL;
  51       detail->code = 0;
  52       break;
  53
  54     case EXC_ARITHMETIC:
  55       *signo = SIGFPE;
  56       detail->code = 0;
  57       break;
  58
  59     case EXC_EMULATION:
  60     case EXC_SOFTWARE:
  61       *signo = SIGEMT;
  62       detail->code = 0;
  63       break;
  64
  65     case EXC_BREAKPOINT:
  66       *signo = SIGTRAP;
  67       detail->code = 0;
  68       break;
  69     }
  70 }