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dump_eax.S revision 1.2.8.1 
      1  1.2.8.1  skrll /*	$NetBSD: dump_eax.S,v 1.2.8.1 2009/03/03 18:29:00 skrll Exp $	*/
      2      1.1    dsl 
      3      1.1    dsl /*-
      4      1.1    dsl  * Copyright (c) 2003 The NetBSD Foundation, Inc.
      5      1.1    dsl  * All rights reserved.
      6      1.1    dsl  *
      7      1.1    dsl  * This code is derived from software contributed to The NetBSD Foundation
      8      1.1    dsl  * by David Laight.
      9      1.1    dsl  *
     10      1.1    dsl  * Redistribution and use in source and binary forms, with or without
     11      1.1    dsl  * modification, are permitted provided that the following conditions
     12      1.1    dsl  * are met:
     13      1.1    dsl  * 1. Redistributions of source code must retain the above copyright
     14      1.1    dsl  *    notice, this list of conditions and the following disclaimer.
     15      1.1    dsl  * 2. Redistributions in binary form must reproduce the above copyright
     16      1.1    dsl  *    notice, this list of conditions and the following disclaimer in the
     17      1.1    dsl  *    documentation and/or other materials provided with the distribution.
     18      1.1    dsl  *
     19      1.1    dsl  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20      1.1    dsl  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21      1.1    dsl  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22      1.1    dsl  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23      1.1    dsl  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24      1.1    dsl  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25      1.1    dsl  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26      1.1    dsl  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27      1.1    dsl  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28      1.1    dsl  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29      1.1    dsl  * POSSIBILITY OF SUCH DAMAGE.
     30      1.1    dsl  */
     31      1.1    dsl 
     32      1.1    dsl #include <machine/asm.h>
     33      1.1    dsl 
     34      1.1    dsl /* This is useful for debugging - although you may need to
     35      1.1    dsl  * delete some code to fit it in.
     36      1.1    dsl  * %ds:dump_eax_buff must be somewhere it is safe to write 10 bytes.
     37      1.1    dsl  */
     38      1.1    dsl 
     39      1.1    dsl ENTRY(dump_eax)
     40      1.1    dsl 	.code16
     41      1.1    dsl 	pusha					/* saves bottom 16 bits only! */
     42      1.1    dsl 	push	%es				/* allow for %es != %ds */
     43      1.1    dsl 	push	%ds
     44      1.1    dsl 	pop	%es
     45      1.1    dsl 	movw	$dump_eax_buff, %si
     46      1.1    dsl 	mov	%si, %di
     47      1.1    dsl 	movw	$8, %cx
     48      1.1    dsl 1:	roll	$4, %eax
     49      1.1    dsl 	push	%ax
     50      1.1    dsl 	andb	$0x0f, %al
     51      1.1    dsl 	addb	$0x30, %al			/* 30..3f - clear AF */
     52      1.1    dsl #if 1 /* 5 bytes to generate real hex... */
     53      1.1    dsl 	daa					/* 30..39, 40..45 */
     54      1.1    dsl 	addb	$0xc0, %al			/* f0..f9, 00..05 */
     55  1.2.8.1  skrll 	adcb	$0x40, %al			/* 30..39, 41..46 */
     56      1.1    dsl #endif
     57      1.1    dsl 	stosb
     58      1.1    dsl 	pop	%ax
     59      1.1    dsl 	loop	1b
     60      1.1    dsl 	movw	$0x20, %ax			/* space + null */
     61      1.1    dsl 	stosw
     62      1.1    dsl 	pop	%es
     63      1.1    dsl 	jmp	message_1
     64