Help convert AT&T text to Intel text.

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Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 12 Jul 2022, 19:31

Fasmw 1.73
My program get asc2 text.
Convert this text.

Code:

; 5     x = x + y * 2;
        .line   5
        movss   _$3,%xmm5
        mulss   -4(%rbp),%xmm5
        addss   -8(%rbp),%xmm5
        movss   %xmm5,-8(%rbp)

To this text

Code:

; 5     x = x + y * 2;
        .line   5
        movss   xmm5,[_$3]
        mulss   xmm5,[rbp-4]
        addss   xmm5,[rbp-8]
        movss   [rbp-8],xmm5

How do this more elegant and simple ?
I mean small code for this convertion.

12 Jul 2022, 19:31

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20451
Location: In your JS exploiting you and your system

revolution 12 Jul 2022, 20:20

You need to set your disassembler to output Intel mode, and not use AT&T mode.

12 Jul 2022, 20:20

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 12 Jul 2022, 20:34

lcc64.exe
i try but not found how do this.
https://lcc-win32.services.net/

12 Jul 2022, 20:34

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20451
Location: In your JS exploiting you and your system

revolution 12 Jul 2022, 20:55

Use a different disassembler.

12 Jul 2022, 20:55

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 13 Jul 2022, 04:02

Code:

txtzz     db 40 dup (0)
txtz2     db 40 dup (0)  
txtfx     db 40 dup (0)      
                pars:     db 'inc    %rbp',13,10
                          db 'movss     _$3,%xmm5',13,10
                          db 'mulss   -4(%rbp),%xmm5',13,10
                          db 'addss   -8(%rbp),%xmm5',13,10
                          db 'movss   %xmm5,-8(%rbp)',13,0
section '.code' code readable writeable executable
macro txtfixer in { local .ccc,.ss ,.xx
                mov      edx,in-1
                movups   xmm0,dqword [in]
                movaps   xmm1,xmm0
.ccc:           inc      edx
                cmp      byte [edx],0
                jz       .xx
                PALIGNR  xmm1,xmm1,1
                cmp      byte [edx],'('
                jnz      .ccc

                mov     byte [in],'['
                movq     qword [in+1],xmm1
                movups      dqword [in+4],xmm0
                mov      rax,in+4
.ss:            inc      rax
                cmp      byte [rax],'('
                jnz     .ss
                mov     word [rax],0x005D
.xx:           ; Msg     in
      }
macro txtfixer2 in { local .l1,.ll,.up,.hh,.xx
      mov  rdx,txtfx
      mov  rax,in
      mov  rbx,rax
.l1:  inc  rbx
      cmp  byte [rbx],13
      jbe  .ll
      cmp  byte [rbx],'('
      jnz  .l1

.up:  mov  cl,[rbx]
      mov  [rdx],cl
      inc  rbx
      inc  rdx
      cmp  cl,')'
      jnz  .up
      mov  byte [rdx-1],' '
.hh:
      inc  rdx
      mov  cl,[rax]
      mov  [rdx-1],cl
      inc  rax
      cmp  cl,'('
      jnz  .hh
      mov  byte [rdx-1],')'
      mov  word [rdx],0

      mov  rdx,txtfx
      mov  rbx,in
.xx:  mov  al,[rdx]
      mov  [rbx],al
      inc  rdx
      inc  rbx
      test al,al
      jnz  .xx
.ll:
      }               
macro FindLineT reg,tkn,mcopy,mcopyB { local .l1,.l2,.l3,.ll,.oo
                sub  ch,ch
.l1:            inc  reg
                cmp  byte [reg],13
                jbe  .ll
                cmp  byte [reg],tkn
                jnz  .l1
                inc  ch
                mov  rdx,reg
.oo:            dec  rdx
                cmp  byte [rdx],9
                jz   .oo
                cmp  byte [rdx],32
                ja   .oo
                mov  r10,rdx
                inc r10
                mov  rax,mcopyB
.uu:            mov  cl,[rdx]
                cmp  cl,'%'
                jz   .u2
                mov  [rax],cl
                inc  rax
.u2:            inc  rdx
                cmp  cl,','
                jnz  .uu
                mov  word [rax-1],0
                mov  rax,mcopy
.l2:            inc  reg
                mov  cl,[reg]
                cmp  cl,'%'
                jz   .l3
                mov  [rax],cl
                inc  rax
.l3:
                cmp  cl,13
                ja   .l2
                mov  word [rax-1],0

.ll:
                }
Start:          sub     rsp,8                
                mov     r15,pars
 .kk:         FindLineT r15,',',txtzz,txtz2
                cmp byte [r15],0
                jz  .enn
                test     ch,ch
                jz   .kk
                txtfixer txtzz
                txtfixer txtz2  
                mov      rdx,txtzz-1
.yy:            inc     rdx
                mov     al,[rdx]
                test    al,al
                jz      .o
                mov     [r10],al
                inc     r10
                jmp     .yy
.o:             mov     byte [r10],','
                inc     r10
                mov      rdx,txtz2-1
.yy2:            inc     rdx
                mov     al,[rdx]
                test    al,al
                jz      .o2
                mov     [r10],al
                inc     r10
                jmp     .yy2
.o2:            mov     byte [r10],' '
                jmp     .kk
.enn:           mov     r15,pars
.en2:           inc     r15
                cmp byte [r15],0
                jz  .en3
                cmp byte [r15],')'
                jnz .we1
                mov byte [r15],']'
                jmp .en2
.we1:            cmp byte [r15],'('
                jnz .we2
                mov byte [r15],'['
                jmp .en2
.we2:
                cmp byte [r15],'%'
                jnz  .en2
                mov   byte [r15],' '
                jmp   .en2
.en3:
                invoke MessageBox,0,pars,0,0

Last edited by Roman on 13 Jul 2022, 11:56; edited 2 times in total

13 Jul 2022, 04:02

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 13 Jul 2022, 05:53

https://www.youtube.com/watch?v=gkibySbPeq0&ab_channel=Roman8139
My question could sse xmm1 rol text ?
Movq to xmm1 "-8(%rbp)"
Rol xmm1 and get "(%rbp)-8"

Last edited by Roman on 13 Jul 2022, 07:26; edited 1 time in total

13 Jul 2022, 05:53

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 13 Jul 2022, 06:51

I found VPROLVD and pshufb
But VPROLVD xmm1,xmm1,xmm1 crash.

pshufb get result.

Code:

Rev dB 3,4,5,6,7,0,1,2,8,9,10,11,12,13,14,15
mov rax,"-8(%rbp)"
movq xmm1,rax

movups xmm2,dqword [rev]
pshufb   xmm1, xmm2 ;xmm1 "%rbp)-8("

13 Jul 2022, 06:51

FlierMate1

Joined: 31 May 2022
Posts: 118

FlierMate1 13 Jul 2022, 11:41

If you have the raw machine code, you can paste it on onlinedisassembler.com for Intel mnemonic. (It lets you choose Intel or AT&T mnemonics)

Description:
Filesize:	21.92 KB
Viewed:	4831 Time(s)

13 Jul 2022, 11:41

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 13 Jul 2022, 14:01

FlierMate1 wrote:

you can paste it on onlinedisassembler.com

This site not open. I try.
Two reason write owner parser.
No Internet or not open site.

13 Jul 2022, 14:01

FlierMate1

Joined: 31 May 2022
Posts: 118

FlierMate1 13 Jul 2022, 14:20

Roman wrote:

FlierMate1 wrote:
you can paste it on onlinedisassembler.com

This site not open. I try.
Two reason write owner parser.
No Internet or not open site.

The direct link is : https://onlinedisassembler.com/odaweb/

Strange, why is it not opened? Censorship?

You can try other online disassembler but this "odaweb" is the best I have found to-date.

Description:	Screenshot of odaweb
Filesize:	304 KB
Viewed:	4800 Time(s)

13 Jul 2022, 14:20

Roman

Joined: 21 Apr 2012
Posts: 1847

Roman 13 Jul 2022, 15:15

Quote:

ttps://onlinedisassembler.com/odaweb/

This site not open.

13 Jul 2022, 15:15

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