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