initial import

1 files changed, 165 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/i386/exc2signal.c b/sysdeps/mach/hurd/i386/exc2signal.c
new file mode 100644
index 0000000000..19f845a49e
--- /dev/null
+++ b/sysdeps/mach/hurd/i386/exc2signal.c
@@ -0,0 +1,165 @@
+/* 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;
+    }
+}