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