dump_eax.S revision 1.1
1 1.1 dsl /* $NetBSD: dump_eax.S,v 1.1 2003/04/16 13:24:09 dsl 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 * 3. All advertising materials mentioning features or use of this software 19 1.1 dsl * must display the following acknowledgement: 20 1.1 dsl * This product includes software developed by the NetBSD 21 1.1 dsl * Foundation, Inc. and its contributors. 22 1.1 dsl * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1 dsl * contributors may be used to endorse or promote products derived 24 1.1 dsl * from this software without specific prior written permission. 25 1.1 dsl * 26 1.1 dsl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1 dsl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1 dsl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1 dsl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1 dsl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1 dsl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1 dsl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1 dsl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1 dsl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1 dsl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1 dsl * POSSIBILITY OF SUCH DAMAGE. 37 1.1 dsl */ 38 1.1 dsl 39 1.1 dsl #include <machine/asm.h> 40 1.1 dsl 41 1.1 dsl /* This is useful for debugging - although you may need to 42 1.1 dsl * delete some code to fit it in. 43 1.1 dsl * %ds:dump_eax_buff must be somewhere it is safe to write 10 bytes. 44 1.1 dsl */ 45 1.1 dsl 46 1.1 dsl ENTRY(dump_eax) 47 1.1 dsl .code16 48 1.1 dsl pusha /* saves bottom 16 bits only! */ 49 1.1 dsl push %es /* allow for %es != %ds */ 50 1.1 dsl push %ds 51 1.1 dsl pop %es 52 1.1 dsl movw $dump_eax_buff, %si 53 1.1 dsl mov %si, %di 54 1.1 dsl movw $8, %cx 55 1.1 dsl 1: roll $4, %eax 56 1.1 dsl push %ax 57 1.1 dsl andb $0x0f, %al 58 1.1 dsl addb $0x30, %al /* 30..3f - clear AF */ 59 1.1 dsl #if 1 /* 5 bytes to generate real hex... */ 60 1.1 dsl daa /* 30..39, 40..45 */ 61 1.1 dsl addb $0xc0, %al /* f0..f9, 00..05 */ 62 1.1 dsl adcb $0x40, %al /* 30..39, 41..45 */ 63 1.1 dsl #endif 64 1.1 dsl stosb 65 1.1 dsl pop %ax 66 1.1 dsl loop 1b 67 1.1 dsl movw $0x20, %ax /* space + null */ 68 1.1 dsl stosw 69 1.1 dsl pop %es 70 1.1 dsl jmp message_1 71
Indexes created Fri Sep 26 20:09:58 GMT 2025