lzma_d_cf.s

UPX 源代码

        push    si
        push    di
        push    bp
        mov     bp,sp
        sub     sp,102
        mov     si,word ptr [bp+8]
        lea     bx,[si+4]
        mov     word ptr [bp-34],bx
        xor     ax,ax
        mov     word ptr [bp-20],ax
        mov     word ptr [bp-18],ax
        mov     byte ptr [bp-2],0
        mov     cl,byte ptr [si+2]
        mov     ax,1
        shl     ax,cl
        dec     ax
        mov     word ptr [bp-88],ax
        mov     cl,byte ptr [si+1]
        mov     ax,1
        shl     ax,cl
        dec     ax
        cwd
        mov     word ptr [bp-86],ax
        mov     word ptr [bp-84],dx
        xor     ax,ax
        mov     word ptr [bp-16],ax
        mov     word ptr [bp-100],ax
        mov     word ptr [bp-50],ax
        mov     word ptr [bp-54],ax
        mov     word ptr [bp-74],ax
        mov     bx,word ptr [bp+18]
        mov     word ptr [bx],ax
        mov     word ptr [bx+2],ax
        mov     bx,word ptr [bp+28]
        mov     word ptr [bx],ax
        mov     word ptr [bx+2],ax
        inc     ax
        mov     word ptr [bp-102],ax
        mov     word ptr [bp-52],ax
        mov     word ptr [bp-56],ax
        mov     word ptr [bp-68],ax
        mov     al,byte ptr [si]
        mov     word ptr [bp-78],ax
        mov     dl,byte ptr [si+1]
        xor     dh,dh
        mov     cx,ax
        add     cx,dx
        mov     ax,768
        xor     dl,dl
        jcxz    .Lf001
.Lf000:
        shl     ax,1
        rcl     dx,1
        loop    .Lf000
.Lf001:
        mov     si,ax
        add     si,1846
        mov     cx,dx
        adc     cx,0
        xor     dx,dx
        xor     ax,ax
.Lf002:
        cmp     ax,cx
        jb      .Lf003
        jne     .Lf004
        cmp     dx,si
        jae     .Lf004
.Lf003:
        mov     bx,dx
        shl     bx,1
        add     bx,word ptr [bp-34]
        mov     word ptr [bx],1024
        add     dx,1
        adc     ax,0
        jmp     .Lf002
.Lf004:
        mov     bx,word ptr [bp+10]
        mov     word ptr [bp-12],bx
        mov     ax,word ptr [bp+12]
        mov     word ptr [bp-10],ax
        mov     ax,bx
        mov     dx,word ptr [bp+12]
        mov     bx,word ptr [bp+14]
        mov     cx,word ptr [bp+16]
        M_PIA
        mov     word ptr [bp-30],ax
        mov     word ptr [bp-28],dx
        xor     ax,ax
        mov     word ptr [bp-6],ax
        mov     word ptr [bp-4],ax
        mov     si,65535
        mov     di,si
        mov     word ptr [bp-72],ax
        jmp     .Lf006
.Lf005:
        les     bx,dword ptr [bp-12]
        mov     al,byte ptr es:[bx]
        mov     byte ptr [bp-90],al
        mov     byte ptr [bp-89],0
        mov     ax,word ptr [bp-6]
        mov     dx,word ptr [bp-4]
        M_shld_8
        mov     bx,word ptr [bp-90]
        or      bx,ax
        mov     word ptr [bp-6],bx
        mov     word ptr [bp-4],dx
        mov     ax,word ptr [bp-12]
        mov     dx,es
        M_PIA1
        mov     word ptr [bp-12],ax
        mov     word ptr [bp-10],dx
        inc     word ptr [bp-72]
        cmp     word ptr [bp-72],5
        jge     .Lf008
.Lf006:
        mov     ax,word ptr [bp-12]
        mov     dx,word ptr [bp-10]
        mov     bx,word ptr [bp-30]
        mov     cx,word ptr [bp-28]
        M_PTC_JNE .Lf005
.Lf007:
        mov     ax,1
        jmp     .Lf125
.Lf008:
        mov     ax,word ptr [bp-18]
        cmp     ax,word ptr [bp+26]
        jb      .Lf011
        je      .Lf010
.Lf009:
        jmp     .Lf122
.Lf010:
        mov     ax,word ptr [bp-20]
        cmp     ax,word ptr [bp+24]
        jae     .Lf009
.Lf011:
        mov     ax,word ptr [bp-20]
        and     ax,word ptr [bp-88]
        mov     word ptr [bp-58],ax
        mov     cl,5
        mov     dx,word ptr [bp-16]
        shl     dx,cl
        add     dx,word ptr [bp-34]
        shl     ax,1
        add     dx,ax
        mov     word ptr [bp-14],dx
        cmp     di,256
        jae     .Lf012
        mov     ax,word ptr [bp-12]
        mov     dx,word ptr [bp-10]
        mov     bx,word ptr [bp-30]
        mov     cx,word ptr [bp-28]
        M_PTC
        je      .Lf007
        M_shld_disi_8_bxcx
        les     bx,dword ptr [bp-12]
        mov     al,byte ptr es:[bx]
        mov     byte ptr [bp-90],al
        mov     byte ptr [bp-89],0
        mov     ax,word ptr [bp-6]
        mov     dx,word ptr [bp-4]
        M_shld_8
        mov     bx,word ptr [bp-90]
        or      bx,ax
        mov     word ptr [bp-6],bx
        mov     word ptr [bp-4],dx
        mov     ax,word ptr [bp-12]
        mov     dx,es
        M_PIA1
        mov     word ptr [bp-12],ax
        mov     word ptr [bp-10],dx
.Lf012:
        M_shrd_11_disi_bp -96 -98
        mov     bx,word ptr [bp-14]
        mov     bx,word ptr [bx]
        M_U4M_dxax_00bx
        mov     word ptr [bp-8],ax
        mov     word ptr [bp-94],dx
        mov     ax,word ptr [bp-4]
        cmp     ax,dx
        jb      .Lf015
        je      .Lf014
.Lf013:
        jmp     .Lf034
.Lf014:
        mov     ax,word ptr [bp-6]
        cmp     ax,word ptr [bp-8]
        jae     .Lf013
.Lf015:
        mov     word ptr [bp-26],1
        mov     si,word ptr [bp-8]
        mov     di,dx
        mov     ax,2048
        mov     bx,word ptr [bp-14]
        sub     ax,word ptr [bx]
        mov     cl,5
        shr     ax,cl
        add     word ptr [bx],ax
        mov     cx,8
        sub     cx,word ptr [bp-78]
        mov     al,byte ptr [bp-2]
        xor     ah,ah
        sar     ax,cl
        cwd
        mov     word ptr [bp-90],ax
        mov     bx,dx
        mov     ax,word ptr [bp-20]
        and     ax,word ptr [bp-86]
        mov     dx,word ptr [bp-18]
        and     dx,word ptr [bp-84]
        mov     cx,word ptr [bp-78]
        jcxz    .Lf017
.Lf016:
        shl     ax,1
        rcl     dx,1
        loop    .Lf016
.Lf017:
        add     ax,word ptr [bp-90]
        adc     dx,bx
        M_U4M_dxax_0x0600
        mov     dx,word ptr [bp-34]
        add     dx,3692
        add     dx,ax
        mov     word ptr [bp-14],dx
        cmp     word ptr [bp-16],7
        jge     .Lf018
        jmp     .Lf025
.Lf018:
        mov     bx,word ptr [bp-20]
        sub     bx,word ptr [bp-102]
        mov     cx,word ptr [bp-18]
        sbb     cx,word ptr [bp-100]
        mov     ax,word ptr [bp+20]
        mov     dx,word ptr [bp+22]
        M_PIA
        mov     bx,ax
        mov     es,dx
        mov     al,byte ptr es:[bx]
        xor     ah,ah
        mov     word ptr [bp-76],ax
.Lf019:
        shl     word ptr [bp-76],1
        mov     ax,word ptr [bp-76]
        xor     al,al
        and     ah,1
        mov     word ptr [bp-66],ax
        shl     ax,1
        mov     dx,word ptr [bp-14]
        add     dh,2
        add     dx,ax
        mov     ax,word ptr [bp-26]
        shl     ax,1
        add     dx,ax
        mov     word ptr [bp-46],dx
        cmp     di,256
        jae     .Lf021
        mov     ax,word ptr [bp-12]
        mov     dx,word ptr [bp-10]
        mov     bx,word ptr [bp-30]
        mov     cx,word ptr [bp-28]
        M_PTC_JNE .Lf020
        jmp     .Lf007
.Lf020:
        M_shld_disi_8_bxcx
        les     bx,dword ptr [bp-12]
        mov     al,byte ptr es:[bx]
        mov     byte ptr [bp-90],al
        mov     byte ptr [bp-89],0
        mov     ax,word ptr [bp-6]
        mov     dx,word ptr [bp-4]
        M_shld_8
        mov     bx,word ptr [bp-90]
        or      bx,ax
        mov     word ptr [bp-6],bx
        mov     word ptr [bp-4],dx
        mov     ax,word ptr [bp-12]
        mov     dx,es
        M_PIA1
        mov     word ptr [bp-12],ax
        mov     word ptr [bp-10],dx
.Lf021:
        M_shrd_11_disi_bp -96 -98
        mov     bx,word ptr [bp-46]
        mov     bx,word ptr [bx]
        M_U4M_dxax_00bx
        mov     word ptr [bp-8],ax
        mov     word ptr [bp-94],dx
        mov     ax,word ptr [bp-4]
        cmp     ax,dx
        jb      .Lf022
        jne     .Lf023
        mov     ax,word ptr [bp-6]
        cmp     ax,word ptr [bp-8]
        jae     .Lf023
.Lf022:
        mov     si,word ptr [bp-8]
        mov     di,dx
        mov     ax,2048
        mov     bx,word ptr [bp-46]
        sub     ax,word ptr [bx]
        mov     cl,5
        shr     ax,cl
        add     word ptr [bx],ax
        shl     word ptr [bp-26],1
        cmp     word ptr [bp-66],0
        jne     .Lf025
        jmp     .Lf024
.Lf023:
        sub     si,word ptr [bp-8]
        sbb     di,dx
        mov     ax,word ptr [bp-8]
        sub     word ptr [bp-6],ax
        sbb     word ptr [bp-4],dx
        mov     cl,5
        mov     bx,word ptr [bp-46]
        mov     ax,word ptr [bx]
        shr     ax,cl
        sub     word ptr [bx],ax
        mov     ax,word ptr [bp-26]
        add     ax,ax
        inc     ax
        mov     word ptr [bp-26],ax
        cmp     word ptr [bp-66],0
        je      .Lf025
.Lf024:
        cmp     word ptr [bp-26],256
        jge     .Lf025
        jmp     .Lf019
.Lf025:
        mov     ax,word ptr [bp-26]
        cmp     ax,256
        jl      .Lf026
        jmp     .Lf031
.Lf026:
        shl     ax,1
        mov     bx,word ptr [bp-14]
        add     bx,ax
        mov     word ptr [bp-40],bx
        cmp     di,256
        jae     .Lf028
        mov     ax,word ptr [bp-12]
        mov     dx,word ptr [bp-10]
        mov     bx,word ptr [bp-30]
        mov     cx,word ptr [bp-28]
        M_PTC_JNE .Lf027
        jmp     .Lf007
.Lf027:
        M_shld_disi_8_bxcx
        les     bx,dword ptr [bp-12]
        mov     al,byte ptr es:[bx]
        mov     byte ptr [bp-90],al
        mov     byte ptr [bp-89],0
        mov     ax,word ptr [bp-6]
        mov     dx,word ptr [bp-4]
        M_shld_8
        mov     bx,word ptr [bp-90]
        or      bx,ax
        mov     word ptr [bp-6],bx
        mov     word ptr [bp-4],dx
        mov     ax,word ptr [bp-12]
        mov     dx,es
        M_PIA1
        mov     word ptr [bp-12],ax
        mov     word ptr [bp-10],dx
.Lf028:
        M_shrd_11_disi_bp -96 -98
        mov     bx,word ptr [bp-40]
        mov     bx,word ptr [bx]
        M_U4M_dxax_00bx
        mov     word ptr [bp-8],ax
        mov     word ptr [bp-94],dx
        mov     ax,word ptr [bp-4]
        cmp     ax,dx
        jb      .Lf029
        jne     .Lf030
        mov     ax,word ptr [bp-6]
        cmp     ax,word ptr [bp-8]
        jae     .Lf030
.Lf029:
        mov     si,word ptr [bp-8]
        mov     di,dx
        mov     ax,2048
        mov     bx,word ptr [bp-40]
        sub     ax,word ptr [bx]
        mov     cl,5
        shr     ax,cl
        add     word ptr [bx],ax
        shl     word ptr [bp-26],1
        jmp     .Lf025
.Lf030:
        sub     si,word ptr [bp-8]
        sbb     di,dx
        mov     ax,word ptr [bp-8]
        sub     word ptr [bp-6],ax
        sbb     word ptr [bp-4],dx
        mov     cl,5
        mov     bx,word ptr [bp-40]
        mov     ax,word ptr [bx]
        shr     ax,cl
        sub     word ptr [bx],ax
        mov     ax,word ptr [bp-26]
        add     ax,ax
        inc     ax
        mov     word ptr [bp-26],ax
        jmp     .Lf025
.Lf031:
        mov     al,byte ptr [bp-26]
        mov     byte ptr [bp-2],al
        mov     bx,word ptr [bp-20]
        mov     cx,word ptr [bp-18]
        add     word ptr [bp-20],1
        adc     word ptr [bp-18],0
        mov     ax,word ptr [bp+20]
        mov     dx,word ptr [bp+22]
        M_PIA
        mov     bx,ax
        mov     es,dx
        mov     al,byte ptr [bp-26]
        mov     byte ptr es:[bx],al
        mov     ax,word ptr [bp-16]
        cmp     ax,4
        jge     .Lf032
        xor     ax,ax
        mov     word ptr [bp-16],ax
        jmp     .Lf008
.Lf032:
        cmp     ax,10
        jge     .Lf033
        sub     word ptr [bp-16],3
        jmp     .Lf008
.Lf033:
        sub     word ptr [bp-16],6
        jmp     .Lf008
.Lf034:
        sub     si,word ptr [bp-8]
        sbb     di,dx
        mov     ax,word ptr [bp-8]
        sub     word ptr [bp-6],ax
        sbb     word ptr [bp-4],dx
        mov     cl,5
        mov     bx,word ptr [bp-14]
        mov     ax,word ptr [bx]
        shr     ax,cl
        sub     word ptr [bx],ax
        mov     ax,word ptr [bp-16]
        shl     ax,1
        mov     dx,word ptr [bp-34]
        add     dx,384
        add     dx,ax
        mov     word ptr [bp-14],dx
        cmp     di,256
        jae     .Lf036
        mov     ax,word ptr [bp-12]
        mov     dx,word ptr [bp-10]
        mov     bx,word ptr [bp-30]
        mov     cx,word ptr [bp-28]
        M_PTC_JNE .Lf035
        jmp     .Lf007
.Lf035:
        M_shld_disi_8_bxcx
        les     bx,dword ptr [bp-12]
        mov     al,byte ptr es:[bx]
        mov     byte ptr [bp-90],al
        mov     byte ptr [bp-89],0
        mov     ax,word ptr [bp-6]
        mov     dx,word ptr [bp-4]
        M_shld_8
        mov     bx,word ptr [bp-90]
        or      bx,ax
        mov     word ptr [bp-6],bx
        mov     word ptr [bp-4],dx
        mov     ax,word ptr [bp-12]
        mov     dx,es
        M_PIA1
        mov     word ptr [bp-12],ax
        mov     word ptr [bp-10],dx
.Lf036:
        M_shrd_11_disi_bp -96 -98
        mov     bx,word ptr [bp-14]
        mov     bx,word ptr [bx]
        M_U4M_dxax_00bx
        mov     word ptr [bp-8],ax
        mov     word ptr [bp-94],dx
        mov     ax,word ptr [bp-4]
        cmp     ax,dx
        jb      .Lf037
        jne     .Lf040
        mov     ax,word ptr [bp-6]
        cmp     ax,word ptr [bp-8]
        jae     .Lf040
.Lf037: