[PATCH] v850 kernel entry fixes and cleanup

1) Preserve the v850 system-call-number register when handling a signal;
   otherwise system calls will not be correctly restarted afterwards
2) Correctly handle illegal insn exceptions, which need a special
   instruction to return (not reti), and save PC/PSW to a different place
2) Remove some unnecessary register saving in the trap handler
3) Consolidate various places that use the register save/restore macros
4) Eliminate some unused compile-time configuration stuff
5) A bit of whitespace and other syntactic cleanup

arch/v850/kernel/bug.c

 /*
  * arch/v850/kernel/bug.c -- Bug reporting functions
  *
- *  Copyright (C) 2001,02  NEC Corporation
- *  Copyright (C) 2001,02  Miles Bader <miles@gnu.org>
+ *  Copyright (C) 2001,02,03  NEC Electronics Corporation
+ *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
  *
  * This file is subject to the terms and conditions of the GNU General
  * Public License.  See the file COPYING in the main directory of this
@@ -40,12 +40,6 @@ int bad_trap (int trap_num, struct pt_regs *regs)
 	return -ENOSYS;
 }
 
-int debug_trap (struct pt_regs *regs)
-{
-	printk (KERN_CRIT "debug trap at 0x%08lx!\n", regs->pc);
-	return -ENOSYS;
-}
-
 #ifdef CONFIG_RESET_GUARD
 void unexpected_reset (unsigned long ret_addr, unsigned long kmode,
 		       struct task_struct *task, unsigned long sp)

arch/v850/kernel/intv.S

 /*
  * arch/v850/kernel/intv.S -- Interrupt vectors
  *
- *  Copyright (C) 2001,02  NEC Corporation
- *  Copyright (C) 2001,02  Miles Bader <miles@gnu.org>
+ *  Copyright (C) 2001,02,03  NEC Electronics Corporation
+ *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
  *
  * This file is subject to the terms and conditions of the GNU General
  * Public License.  See the file COPYING in the main directory of this
@@ -40,22 +40,19 @@
 	/* Generic interrupt vectors.  */
 	.section	.intv.common, "ax"
 	.balign	0x10
-	JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)	// NMI0
+	JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)	// 0x10 - NMI0
 	.balign	0x10
-	JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)	// NMI1
+	JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)	// 0x20 - NMI1
 	.balign	0x10
-	JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)	// NMI2
+	JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)	// 0x30 - NMI2
 	
 	.balign	0x10
-	JUMP_TO_HANDLER (trap, ENTRY_SP)	// TRAP0n
+	JUMP_TO_HANDLER (trap, ENTRY_SP)	// 0x40 - TRAP0n
 	.balign	0x10
-	JUMP_TO_HANDLER (trap, ENTRY_SP)	// TRAP1n
+	JUMP_TO_HANDLER (trap, ENTRY_SP)	// 0x50 - TRAP1n
 
 	.balign	0x10
-	JUMP_TO_HANDLER (irq, ENTRY_SP)		// illegal insn trap
-
-	.balign	0x10
-	JUMP_TO_HANDLER (irq, ENTRY_SP)		// DBTRAP insn
+	JUMP_TO_HANDLER (dbtrap, ENTRY_SP)	// 0x60 - Illegal op / DBTRAP insn
 
 
 	/* Hardware interrupt vectors.  */