1*58a2b000SEvgeniy Ivanov/* $NetBSD: dump_eax.S,v 1.4 2009/11/19 22:08:14 dsl Exp $ */ 2*58a2b000SEvgeniy Ivanov 3*58a2b000SEvgeniy Ivanov/*- 4*58a2b000SEvgeniy Ivanov * Copyright (c) 2003 The NetBSD Foundation, Inc. 5*58a2b000SEvgeniy Ivanov * All rights reserved. 6*58a2b000SEvgeniy Ivanov * 7*58a2b000SEvgeniy Ivanov * This code is derived from software contributed to The NetBSD Foundation 8*58a2b000SEvgeniy Ivanov * by David Laight. 9*58a2b000SEvgeniy Ivanov * 10*58a2b000SEvgeniy Ivanov * Redistribution and use in source and binary forms, with or without 11*58a2b000SEvgeniy Ivanov * modification, are permitted provided that the following conditions 12*58a2b000SEvgeniy Ivanov * are met: 13*58a2b000SEvgeniy Ivanov * 1. Redistributions of source code must retain the above copyright 14*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer. 15*58a2b000SEvgeniy Ivanov * 2. Redistributions in binary form must reproduce the above copyright 16*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer in the 17*58a2b000SEvgeniy Ivanov * documentation and/or other materials provided with the distribution. 18*58a2b000SEvgeniy Ivanov * 19*58a2b000SEvgeniy Ivanov * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20*58a2b000SEvgeniy Ivanov * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21*58a2b000SEvgeniy Ivanov * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22*58a2b000SEvgeniy Ivanov * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23*58a2b000SEvgeniy Ivanov * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24*58a2b000SEvgeniy Ivanov * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25*58a2b000SEvgeniy Ivanov * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26*58a2b000SEvgeniy Ivanov * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27*58a2b000SEvgeniy Ivanov * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28*58a2b000SEvgeniy Ivanov * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29*58a2b000SEvgeniy Ivanov * POSSIBILITY OF SUCH DAMAGE. 30*58a2b000SEvgeniy Ivanov */ 31*58a2b000SEvgeniy Ivanov 32*58a2b000SEvgeniy Ivanov#include <machine/asm.h> 33*58a2b000SEvgeniy Ivanov 34*58a2b000SEvgeniy Ivanov/* This is useful for debugging - although you may need to 35*58a2b000SEvgeniy Ivanov * delete some code to fit it in. 36*58a2b000SEvgeniy Ivanov * %ds:dump_eax_buff must be somewhere it is safe to write 10 bytes. 37*58a2b000SEvgeniy Ivanov */ 38*58a2b000SEvgeniy Ivanov 39*58a2b000SEvgeniy IvanovENTRY(dump_eax) 40*58a2b000SEvgeniy Ivanov .code16 41*58a2b000SEvgeniy Ivanov pusha /* saves bottom 16 bits only! */ 42*58a2b000SEvgeniy Ivanov movw $dump_eax_buff, %si 43*58a2b000SEvgeniy Ivanov mov %si, %di 44*58a2b000SEvgeniy Ivanov movw $8, %cx 45*58a2b000SEvgeniy Ivanov1: roll $4, %eax 46*58a2b000SEvgeniy Ivanov push %ax 47*58a2b000SEvgeniy Ivanov andb $0x0f, %al 48*58a2b000SEvgeniy Ivanov addb $0x30, %al /* 30..3f - clear AF */ 49*58a2b000SEvgeniy Ivanov#if 1 /* 5 bytes to generate real hex... */ 50*58a2b000SEvgeniy Ivanov daa /* 30..39, 40..45 */ 51*58a2b000SEvgeniy Ivanov addb $0xc0, %al /* f0..f9, 00..05 */ 52*58a2b000SEvgeniy Ivanov adcb $0x40, %al /* 30..39, 41..46 */ 53*58a2b000SEvgeniy Ivanov#endif 54*58a2b000SEvgeniy Ivanov mov %al,(%di) 55*58a2b000SEvgeniy Ivanov inc %di 56*58a2b000SEvgeniy Ivanov pop %ax 57*58a2b000SEvgeniy Ivanov loop 1b 58*58a2b000SEvgeniy Ivanov movw $0x20,(%di) /* space + NIL */ 59*58a2b000SEvgeniy Ivanov jmp message_1 60