László Molnár
116 lines
3.1 KiB
NASM
116 lines
3.1 KiB
NASM
/*
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; l_sys.asm -- loader & decompressor for the dos/sys format
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;
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; This file is part of the UPX executable compressor.
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;
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; Copyright (C) 1996-2006 Markus Franz Xaver Johannes Oberhumer
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; Copyright (C) 1996-2006 Laszlo Molnar
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; All Rights Reserved.
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;
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; UPX and the UCL library are free software; you can redistribute them
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; and/or modify them under the terms of the GNU General Public License as
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; published by the Free Software Foundation; either version 2 of
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; the License, or (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program; see the file COPYING.
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; If not, write to the Free Software Foundation, Inc.,
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; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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;
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; Markus F.X.J. Oberhumer Laszlo Molnar
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; <mfx@users.sourceforge.net> <ml1050@users.sourceforge.net>
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;
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*/
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#define SYS 1
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#define COM 0
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#define CJT16 1
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#include "arch/i086/macros.ash"
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CPU 8086
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/*
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; =============
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; ============= ENTRY POINT
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; =============
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*/
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section SYSMAIN1
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start:
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.long -1
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.short attribute
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.short strategy /* .sys header */
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.short interrupt /* opendos wants this field untouched */
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strategy:
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section SYSI2861
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CPU 286
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pusha
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CPU 8086
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section SYSI0861
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push ax
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push bx
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push cx
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push dx
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push si
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push di
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push bp
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section SYSMAIN2
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mov si, offset copy_source
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mov di, offset copy_destination
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mov cx, si /* at the end of the copy si will be 0 */
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push es
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push ds
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pop es
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std
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rep
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movsb
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cld
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mov bx, 0x8000
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xchg di, si
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.byte 0x83, 0xc6, SYSCUTPO /* add si, xxx */
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section SYSSBBBP
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sbb bp, bp
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section SYSCALLT
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push di
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section SYSMAIN3
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jmp decompressor /* FIXME decomp_start_n2b */
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#include "include/header2.ash"
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section SYSCUTPO
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#include "arch/i086/nrv2b_d16.ash"
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section SYSMAIN5
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pop es
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section SYSI2862
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CPU 286
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popa
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CPU 8086
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section SYSI0862
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pop bp
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pop di
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pop si
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pop dx
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pop cx
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pop bx
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pop ax
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section SYSJUMP1
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.byte 0xe9
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.word sys_entry /* FIXME */
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/*
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; vi:ts=8:et:nowrap
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*/
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