Markus F.X.J. Oberhumer
116 lines
3.1 KiB
NASM
116 lines
3.1 KiB
NASM
; l_vmlinz.asm -- loader & decompressor for the vmlinuz/i386 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) 1996-2002 Markus Franz Xaver Johannes Oberhumer
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; Copyright (C) 1996-2002 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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%define jmps jmp short
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%define jmpn jmp near
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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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start:
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; __LINUZ000__
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cli
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xor eax, eax
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mov al, 0x18
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mov ds, eax
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mov es, eax
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mov ss, eax
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mov esp, 'STAK' ; 0x90000
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or ebp, byte -1
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mov eax, 'KEIP' ; 0x100000 - address of startup_32
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push eax
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push edi
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push esi
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%ifdef __LZCALLT1__
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push eax
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%endif; __LZDUMMY0__
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%ifdef __LBZIMAGE__
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mov esi, 'ESI0'
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mov edi, 'EDI0'
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mov ecx, 'ECX0'
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std
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rep
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movsd
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cld
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mov esi, 'ESI1'
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xchg eax, edi
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jmp .1 + 'JMPD' ; jump to the copied decompressor
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.1:
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%else; __LZIMAGE0__
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cld
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mov esi, 'ESI1'
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xchg eax, edi
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; this checka20 stuff looks very unneccessary to me
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checka20:
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inc eax
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mov [ebp + 1], eax
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cmp [edi], eax
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je checka20
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%endif; __LZCUTPOI__
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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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%ifdef __LZCALLT9__
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pop edi
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cjt32 0
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%endif; __LINUZ990__
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pop esi
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pop edi
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xor ebx, ebx ; booting the 1st cpu
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retn
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; =============
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; ============= CUT HERE
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; =============
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%include "header.ash"
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eof:
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; __LITHEEND__
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section .data
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dd -1
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dw eof
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