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