Markus F.X.J. Oberhumer
237 lines
6.6 KiB
NASM
237 lines
6.6 KiB
NASM
; l_ps1.asm -- ps1/exe program entry & decompressor
|
|
;
|
|
; This file is part of the UPX executable compressor.
|
|
;
|
|
; Copyright (C) 1996-2004 Markus Franz Xaver Johannes Oberhumer
|
|
; Copyright (C) 1996-2004 Laszlo Molnar
|
|
; Copyright (C) 2002-2004 Jens Medoch
|
|
; All Rights Reserved.
|
|
;
|
|
; UPX and the UCL library are free software; you can redistribute them
|
|
; and/or modify them under the terms of the GNU General Public License as
|
|
; published by the Free Software Foundation; either version 2 of
|
|
; the License, or (at your option) any later version.
|
|
;
|
|
; This program is distributed in the hope that it will be useful,
|
|
; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
; GNU General Public License for more details.
|
|
;
|
|
; You should have received a copy of the GNU General Public License
|
|
; along with this program; see the file COPYING.
|
|
; If not, write to the Free Software Foundation, Inc.,
|
|
; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
;
|
|
; Markus F.X.J. Oberhumer Laszlo Molnar
|
|
; <mfx@users.sourceforge.net> <ml1050@users.sourceforge.net>
|
|
;
|
|
; Jens Medoch
|
|
; <jssg@users.sourceforge.net>
|
|
;
|
|
|
|
|
|
#include <mr3k/macros.ash>
|
|
|
|
#define HI(a) (a >> 16)
|
|
#define LO(a) (a & 0xffff)
|
|
|
|
#define SZ_REG 4
|
|
|
|
#if CDBOOT
|
|
regs MACRO _w, marker
|
|
_w a0,SZ_REG*0(sp)
|
|
_w a1,SZ_REG*1(sp)
|
|
_w a2,SZ_REG*2(sp)
|
|
_w a3,SZ_REG*3(sp)
|
|
_w v0,SZ_REG*4(sp)
|
|
_w v1,SZ_REG*5(sp)
|
|
IF (marker != 0)
|
|
DW marker
|
|
ENDIF
|
|
_w ra,SZ_REG*6(sp)
|
|
regs ENDM
|
|
|
|
#define REG_SZ (7*SZ_REG)
|
|
|
|
#else //console
|
|
|
|
regs MACRO _w, marker
|
|
_w at,SZ_REG*0(sp)
|
|
_w a0,SZ_REG*1(sp)
|
|
_w a1,SZ_REG*2(sp)
|
|
_w a2,SZ_REG*3(sp)
|
|
_w a3,SZ_REG*4(sp)
|
|
_w v0,SZ_REG*5(sp)
|
|
_w v1,SZ_REG*6(sp)
|
|
_w ra,SZ_REG*7(sp)
|
|
IF (marker != 0)
|
|
DW marker
|
|
addu sp,at
|
|
ENDIF
|
|
regs ENDM
|
|
|
|
#define REG_SZ (8*SZ_REG)
|
|
|
|
#endif //CDBOOT
|
|
|
|
ORG 0
|
|
start:
|
|
|
|
#if CDBOOT
|
|
; =============
|
|
; ============= ENTRY POINT
|
|
; =============
|
|
; for cd-boot only
|
|
|
|
; __PS1START__
|
|
li t0,'PSVR' ; prepare to compute value
|
|
subu t0,s0,t0 ; get stored header offset in mem
|
|
jr t0
|
|
subiu sp,REG_SZ ; adjust stack
|
|
cutpoint:
|
|
; __PS1ENTRY__
|
|
regs sw,0 ; push used regs
|
|
li a0,'CPDO' ; load COMPDATA offset
|
|
; li a1,'CDSZ' ; compressed data size - disabled!
|
|
; __PS1CONHL__
|
|
li a2,'DECO'
|
|
; __PS1CONHI__
|
|
lui a2,HI('DECO')
|
|
|
|
|
|
#else //CONSOLE
|
|
; =============
|
|
; ============= ENTRY POINT
|
|
; =============
|
|
; for console- / cd-boot
|
|
|
|
; __PS1START__
|
|
addiu at,zero,'LS' ; size of decomp. routine
|
|
subu sp,at ; adjust the stack with this size
|
|
regs sw,0 ; push used regs
|
|
subiu a2,at,REG_SZ ; a2 = counter copyloop
|
|
addiu a3,sp,REG_SZ ; get offset for decomp. routine
|
|
move a1,a3
|
|
li a0,'DCRT' ; load decompression routine's offset
|
|
copyloop:
|
|
lw at,0(a0) ; memcpy *a0 -> at -> *a1
|
|
addiu a2,-4
|
|
sw at,0(a1)
|
|
addiu a0,4
|
|
bnez a2,copyloop
|
|
addiu a1,4
|
|
|
|
; __PS1PADCD__
|
|
addiu a0,'PC' ; a0 = pointer compressed data
|
|
; __PS1CONHL__
|
|
lui a2,HI('DECO') ; load DECOMPDATA HI offset
|
|
jr a3
|
|
ori a2,LO('DECO') ; load DECOMPDATA LO offset
|
|
; __PS1CONHI__
|
|
jr a3
|
|
lui a2,HI('DECO') ; same for HI only !(offset&0xffff)
|
|
cutpoint:
|
|
; __PS1ENTRY__
|
|
|
|
#endif //CDBOOT
|
|
; =============
|
|
; ============= DECOMPRESSION
|
|
; =============
|
|
|
|
#ifndef FAST
|
|
# define FAST
|
|
#endif
|
|
|
|
#if CDBOOT
|
|
# ifdef SMALL
|
|
# undef SMALL
|
|
# endif
|
|
#else //CONSOLE
|
|
# ifndef SMALL
|
|
# define SMALL
|
|
# endif
|
|
#endif //CDBOOT
|
|
|
|
#ifdef NRV_BB
|
|
# undef NRV_BB
|
|
#endif
|
|
#define NRV_BB 8
|
|
|
|
; __PS1N2B08__
|
|
#include <mr3k/n2b_d.ash>
|
|
; __PS1N2D08__
|
|
#include <mr3k/n2d_d.ash>
|
|
; __PS1N2E08__
|
|
#include <mr3k/n2e_d.ash>
|
|
|
|
#ifdef NRV_BB
|
|
# undef NRV_BB
|
|
#endif
|
|
#define NRV_BB 32
|
|
|
|
; __PS1N2B32__
|
|
#include <mr3k/n2b_d.ash>
|
|
; __PS1N2D32__
|
|
#include <mr3k/n2d_d.ash>
|
|
; __PS1N2E32__
|
|
#include <mr3k/n2e_d.ash>
|
|
|
|
|
|
; =============
|
|
|
|
; __PS1MSETB__
|
|
ori a0,zero,'SC' ; amount of removed zero's at eof
|
|
sll a0,3 ; (cd mode 2 data sector alignment)
|
|
; __PS1MSETS__
|
|
ori a0,zero,'SC' ; amount of removed zero's at eof
|
|
; __PS1MSETA__
|
|
memset_aligned:
|
|
sw zero,0(a2)
|
|
addiu a0,-4
|
|
bnez a0,memset_aligned
|
|
addiu a2,4
|
|
; __PS1MSETU__
|
|
memset_unaligned:
|
|
swl zero,3(a2)
|
|
swr zero,0(a2)
|
|
addiu a0,-4
|
|
bnez a0,memset_unaligned
|
|
addiu a2,4
|
|
|
|
; =============
|
|
|
|
; __PS1EXITC__
|
|
li t2,160 ; flushes
|
|
jalr ra,t2 ; instruction
|
|
li t1,68 ; cache
|
|
regs lw, 'JPEP' ; marker for the entry jump
|
|
|
|
; =============
|
|
|
|
; __PS1PAHDR__
|
|
DB 85,80,88,33 ; 0 UPX_MAGIC_LE32
|
|
; another magic for PackHeader::putPackHeader
|
|
DB 161,216,208,213 ; UPX_MAGIC2_LE32
|
|
DW 0 ; 8 uncompressed adler32
|
|
DW 0 ; 12 compressed adler32
|
|
DW 0 ; 16 uncompressed len
|
|
DW 0 ; 20 compressed len
|
|
DW 0 ; 24 original file size
|
|
DB 0 ; 28 filter id
|
|
DB 0 ; 29 filter cto
|
|
DB 0 ; unsused
|
|
DB 45 ; 31 header checksum
|
|
|
|
; =============
|
|
|
|
#if !CDBOOT
|
|
; __PS1SREGS__
|
|
DW REG_SZ
|
|
#endif //CDBOOT
|
|
|
|
; __PS1EOASM__
|
|
eof:
|
|
; section .data
|
|
DW -1
|
|
DH eof
|