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-rw-r--r--sysdeps/mach/hurd/i386/exc2signal.c165
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diff --git a/sysdeps/mach/hurd/i386/exc2signal.c b/sysdeps/mach/hurd/i386/exc2signal.c
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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, long 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;
+ }
+}