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- /* Translate Mach exception codes into signal numbers. i386 version.
- Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <hurd.h>
- #include <hurd/signal.h>
- #include <mach/exception.h>
-
- /* Translate the Mach exception codes, as received in an `exception_raise' RPC,
- into a signal number and signal subcode. */
-
- void
- _hurd_exception2signal (int exception, int code, int subcode,
- int *signo, int *sigcode, int *error)
- {
- *error = 0;
-
- switch (exception)
- {
- default:
- *signo = SIGIOT;
- *sigcode = exception;
- break;
-
- case EXC_BAD_ACCESS:
- if (code == KERN_PROTECTION_FAILURE)
- *signo = SIGSEGV;
- else
- *signo = SIGBUS;
- *sigcode = subcode;
- *error = code;
- break;
-
- case EXC_BAD_INSTRUCTION:
- *signo = SIGILL;
- if (code == EXC_I386_INVOP)
- *sigcode = ILL_INVOPR_FAULT;
- else if (code == EXC_I386_STKFLT)
- *sigcode = ILL_STACK_FAULT;
- else
- *sigcode = 0;
- break;
-
- case EXC_ARITHMETIC:
- switch (code)
- {
- case EXC_I386_DIV: /* integer divide by zero */
- *signo = SIGFPE;
- *sigcode = FPE_INTDIV_FAULT;
- break;
-
- case EXC_I386_INTO: /* integer overflow */
- *signo = SIGFPE;
- *sigcode = FPE_INTOVF_TRAP;
- break;
-
- /* These aren't anywhere documented or used in Mach 3.0. */
- case EXC_I386_NOEXT:
- case EXC_I386_EXTOVR:
- default:
- *signo = SIGFPE;
- *sigcode = 0;
- break;
-
- case EXC_I386_EXTERR:
- /* Subcode is the fp_status word saved by the hardware.
- Give an error code corresponding to the first bit set. */
- if (subcode & FPS_IE)
- {
- *signo = SIGILL;
- *sigcode = ILL_FPEOPR_FAULT;
- }
- else if (subcode & FPS_DE)
- {
- *signo = SIGFPE;
- *sigcode = FPE_FLTDNR_FAULT;
- }
- else if (subcode & FPS_ZE)
- {
- *signo = SIGFPE;
- *sigcode = FPE_FLTDIV_FAULT;
- }
- else if (subcode & FPS_OE)
- {
- *signo = SIGFPE;
- *sigcode = FPE_FLTOVF_FAULT;
- }
- else if (subcode & FPS_UE)
- {
- *signo = SIGFPE;
- *sigcode = FPE_FLTUND_FAULT;
- }
- else if (subcode & FPS_PE)
- {
- *signo = SIGFPE;
- *sigcode = FPE_FLTINX_FAULT;
- }
- else
- {
- *signo = SIGFPE;
- *sigcode = 0;
- }
- break;
-
- /* These two can only be arithmetic exceptions if we
- are in V86 mode, which sounds like emulation to me.
- (See Mach 3.0 i386/trap.c.) */
- case EXC_I386_EMERR:
- *signo = SIGFPE;
- *sigcode = FPE_EMERR_FAULT;
- break;
- case EXC_I386_BOUND:
- *signo = SIGFPE;
- *sigcode = FPE_EMBND_FAULT;
- break;
- }
- break;
-
- case EXC_EMULATION:
- /* 3.0 doesn't give this one, why, I don't know. */
- *signo = SIGEMT;
- *sigcode = 0;
- break;
-
- case EXC_SOFTWARE:
- /* The only time we get this in Mach 3.0
- is for an out of bounds trap. */
- if (code == EXC_I386_BOUND)
- {
- *signo = SIGFPE;
- *sigcode = FPE_SUBRNG_FAULT;
- }
- else
- {
- *signo = SIGEMT;
- *sigcode = 0;
- }
- break;
-
- case EXC_BREAKPOINT:
- *signo = SIGTRAP;
- if (code == EXC_I386_SGL)
- *sigcode = DBG_SINGLE_TRAP;
- else if (code == EXC_I386_BPT)
- *sigcode = DBG_BRKPNT_FAULT;
- else
- *sigcode = 0;
- break;
- }
- }
-