95 lines
2.6 KiB
NASM
95 lines
2.6 KiB
NASM
; l_djgpp2.asm -- loader & decompressor for the djgpp2/coff 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) 1996-2000 Markus Franz Xaver Johannes Oberhumer
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; Copyright (C) 1996-2000 Laszlo Molnar
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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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; markus.oberhumer@jk.uni-linz.ac.at ml1050@cdata.tvnet.hu
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;
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%define jmps jmp short
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%define jmpl jmp dword
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%include "macros.ash"
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BITS 32
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SECTION .text
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ORG 0
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; =============
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; ============= ENTRY POINT
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; =============
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; __DJ2MAIN1__
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start:
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push ds
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pop es
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mov esi, 'INPP' ; input pointer
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mov edi, 'OUTP' ; output pointer
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%ifdef __DJCALLT1__
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push edi
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%endif; __DJ2MAIN2__
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; cld ; the stub sets this
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or ebp, byte -1
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; =============
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; ============= DECOMPRESSION
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; =============
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%include "n2b_d32.ash"
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%include "n2d_d32.ash"
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; =============
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; __DJ2BSS00__
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mov ecx, 'BSSL'
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rep
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stosd
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%ifdef __DJCALLT2__
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; =============
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; ============= CALLTRICK
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; =============
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pop edi
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cjt32 0
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%endif; __DJRETURN__
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; =============
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push dword 'ENTR' ; entry point
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ret
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; because of a feature of the djgpp loader, the size of this stub must be
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; a multiple of 4 and as the upx decompressor depends on the fact that
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; the compressed data stream begins just after the header, i must
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; use an alignment here - ML
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align 4
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%include "header.ash"
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eof:
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; __DJTHEEND__
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section .data
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dd -1
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dw eof
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; vi:ts=8:et:nowrap
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