--- xnu/xnu-12377.121.6/libsyscall/mach/panic.c
+++ xnu/xnu-1228/libsyscall/mach/panic.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
- *
+ * 
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -22,46 +22,43 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
- *
+ * 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
  */
 
-/*
+/* 
  * Mach Operating System
  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  * All Rights Reserved.
- *
+ * 
  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.
- *
+ * 
  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
+ * 
  * Carnegie Mellon requests users of this software to return to
- *
+ * 
  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  *  School of Computer Science
  *  Carnegie Mellon University
  *  Pittsburgh PA 15213-3890
- *
+ * 
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
 
 #include <mach/mach.h>
 #include <mach/mach_host.h>
-
-#include "abort.h"
-#include "string.h"
-
-extern int write(int fd, const char* cbuf, int nbyte);
+#include <stdarg.h>
+#include <stdio.h>
 
 static mach_port_t master_host_port;
 
@@ -75,11 +72,15 @@
 void
 panic(const char *s, ...)
 {
-	char buffer[1024];
-	int len = _mach_snprintf(buffer, sizeof(buffer), "panic: %s\n", s);
-	write(__STDERR_FILENO, buffer, len);
+	va_list listp;
 
-#define RB_DEBUGGER     0x1000  /* enter debugger NOW */
+	printf("panic: ");
+	va_start(listp, s);
+	vprintf(s, listp);
+	va_end(listp);
+	printf("\n");
+
+#define RB_DEBUGGER	0x1000	/* enter debugger NOW */
 	(void) host_reboot(master_host_port, RB_DEBUGGER);
 
 	/* 4279008 - don't return */