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/*
* Copyright (c) 1994 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
*/
#ifdef DEBUG
#include <mach/machine/asm.h>
#include <i386/xen.h>
#include "debug.h"
.text
ENTRY(_debug_trace)
pushf
cli
pushl %eax
pushl %ebx
.byte 0x36 /* SS: bug in gas? */
movl %ss:EXT(debug_trace_pos),%eax
movl 16(%esp),%ebx
movl %ebx,%ss:EXT(debug_trace_buf)(,%eax,8)
movl 20(%esp),%ebx
movl %ebx,%ss:EXT(debug_trace_buf)+4(,%eax,8)
incl %eax
andl $DEBUG_TRACE_LEN-1,%eax
.byte 0x36 /* SS: bug in gas? */
movl %eax,%ss:EXT(debug_trace_pos)
popl %ebx
popl %eax
popf
ret
#endif /* DEBUG */
/* XXX gas bug? need at least one symbol... */
foo:
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