struc params.

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Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 27 Apr 2025, 06:13

fasmw 1.73

Code:

struc A p1,p2 {
  .#p1 dd ?
  .#p2 dd ?
} 
ptt A x,y 
;in code
mov [ptt.x],5 ;fasm error undefined ptt.x

27 Apr 2025, 06:13

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 27 Apr 2025, 06:22

Code:

struc A p1,p2 {
  \.#p1 dd ?
  .#p2 dd ?
} 
ptt A x,y 
;in code
mov [ptt.x],5
mov [ptty],6

27 Apr 2025, 06:22

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 27 Apr 2025, 06:26

Thanks.

27 Apr 2025, 06:26

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 27 Apr 2025, 06:50

I'll leave my 15th forum post here.

27 Apr 2025, 06:50

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20759
Location: In your JS exploiting you and your system

revolution 27 Apr 2025, 07:16

macomics wrote:

I'll leave my 15th forum post here.

Quote:

Posts: 1111

How you know it is base-2? I always thought it was base-16.

27 Apr 2025, 07:16

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 27 Apr 2025, 09:38

Code:

struc A [p1] { 
      mov eax,p1 ;fasm error
      mov [eax],ebx
      ret
      
  \.#p1 dd ?
}
;in code
ptt A x,y,z

mov ebx,5
call ptt.x

27 Apr 2025, 09:38

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 27 Apr 2025, 10:26

Code:

struc A [p1] { label \.#p1
      mov eax,\.#p1#.var
      mov [eax],ebx
      ret
      
  \.#p1#.var dd ?
}
;in code
ptt A x,y,z

mov ebx,5
call ptt.x

27 Apr 2025, 10:26

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 27 Apr 2025, 11:21

My variant:

Code:

struc C [p1] { \.#p1: dd 0
      mov eax,\.#p1
      mov [eax],ebx
      ret
} 
;in code 
ptt C x,y

mov ebx,5
call ptt.x+4

Or this variant:

Code:

struc C [p1] {

      \.#p1: dd 0
 local ..vv
      .#\.#p1#@ equ ..vv
 ..vv:  mov eax,\.#p1
      mov [eax],ebx
      ret
} 
;in code 
ptt C x,y

mov ebx,5
call ptt.x@

mov [ptt.y],8 ;this error undefined ptt.y

27 Apr 2025, 11:21

a

Joined: 10 Apr 2025
Posts: 29
Location: Ukraine

a 27 Apr 2025, 21:32

revolution wrote:

macomics wrote:
I'll leave my 15th forum post here.

Quote:
Posts: 1111
How you know it is base-2? I always thought it was base-16.

Are you a moron?

It's obviously an octal.

27 Apr 2025, 21:32

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 28 Apr 2025, 06:03

Code:

struc A [p1] { forward \.#p1 dd ?
      forward get@#.#\.#p1:
      mov eax,\.#p1
      mov ebx,[eax]
      ret
      forward set@#.#\.#p1:
      mov eax,\.#p1
      mov [eax],ebx
      ret
}

;in code
ptt A x,y,z

mov ebx,5
call set@ptt.x
call get@ptt.y
call set@ptt.z
mov eax,[ptt.x]

28 Apr 2025, 06:03

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 28 Apr 2025, 06:06

Thanks. Very interesting variant.

I do this variant:

Code:

struc C [p1] {  local ..hh
..hh: dd 0
      .#\.#p1 equ ..hh ;variant work  equ dword [..hh]. in code mov ptt.y,4
 local ..vv
      .#\.#p1#@ equ ..vv

 ..vv:
      mov eax,..hh 
      mov [eax],ebx
      ret
}
;in code 
ptt C x,y

mov ebx,2
call ptt.x@
mov dword [ptt.y],4

Last edited by Roman on 28 Apr 2025, 06:27; edited 3 times in total

28 Apr 2025, 06:06

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 28 Apr 2025, 06:09

Have fun

28 Apr 2025, 06:09

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 28 Apr 2025, 06:13

macomics
You macro get error.

Code:

struc A [p1] { forward \.#p1 dd ?
      forward get@#.#\.#p1:
      mov eax,\.#p1
      mov ebx,[eax]
      ret
      forward set@#.#\.#p1:
      mov eax,\.#p1
      mov [eax],ebx
      ret
}

jtt A x,y,z ;error undefined get@jtt.x.x in line mov eax,\.#p1

I rewrite your macro:

Code:

struc A [p1] {  \.#p1 dd ?
      get@#.#\.#p1:
      mov eax,get@#.#\.#p1-4 ;\.#p1
      mov ebx,[eax]
      ret

      set@#.#\.#p1:
      mov eax,set@#.#\.#p1-4 ;\.#p1
      mov [eax],ebx
      ret
}

Last edited by Roman on 28 Apr 2025, 09:04; edited 3 times in total

28 Apr 2025, 06:13

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 28 Apr 2025, 07:10

It's easy to fix. Just add a struc name to all the labels.

Code:

struc A [p1] { forward .#\.#p1 dd ?
      forward get@#.#\.#p1:
      mov eax,.#\.#p1
      mov ebx,[eax]
      ret
      forward set@#.#\.#p1:
      mov eax,.#\.#p1
      mov [eax],ebx
      ret
}

jtt A x,y,z

28 Apr 2025, 07:10

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 28 Apr 2025, 07:15

Thanks. Work fine.

28 Apr 2025, 07:15

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 30 Apr 2025, 05:09

Attached struc to buffer.

Code:

struc G ss,[p1] {  common
      enumm equ 0
      forward
#.#\.#p1 equ ss+enumm 
adr@#.#\.#p1:
      mov eax,ss+enumm
      ret

get@#.#\.#p1:
      mov eax,ss+enumm
      mov ebx,[eax]
      ret

set@#.#\.#p1:
      mov eax,ss+enumm
      mov [eax],ebx
      ret
      enumm equ enumm+4
}

section '.code' code  writeable executable
       
       buf1: .a:  dd 8 dup(0)
             .b:  dd 8 dup(0)

             tu1 G buf1.a,x,y,z
             tu2 G buf1.b,x,y,z
Start:  mov ebx,5
        call set@tu1.x
        call adr@tu2.x
        mov [eax],25
        mov dword [tu2.z],7

30 Apr 2025, 05:09

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 30 Apr 2025, 13:50

How I understood macro and struc similar.
My question: what special in struc ? And did have struc something special reserved words ?

30 Apr 2025, 13:50

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 30 Apr 2025, 13:56

struc -- allows you to create a macro that will declare instances with a preceding label without a colon, and in this macro there will be an additional reserved word - a dot (the name of this label). Everything else is like in macro.

Code:

use16
macro A {
  .a db 0
  .b db 1
}

struc B {
  .a db 2
  .b db 3
}

instA: A
; instA A - error
instB B
; instB: B - error

mov al, [instA.a]
mov ah, [instA.b]
mov bl, [instB.a]
mov bh, [instB.b]

Code:

$ cat struc_and_macro.asm
use16
macro A {
  .a db 0
  .b db 1
}

struc B {
  .a db 2
  .b db 3
}

instA: A
instB B

mov al, [instA.a]
mov ah, [instA.b]
mov bl, [instB.a]
mov bh, [instB.b]
$ fasm struc_and_macro.asm
flat assembler  version 1.73.32  (16384 kilobytes memory, x64)
1 passes, 19 bytes.
$ hexdump -C struc_and_macro.bin
00000000  00 01 02 03 a0 00 00 8a  26 01 00 8a 1e 02 00 8a  |........&.......|
00000010  3e 03 00                                          |>..|

Code:

00000000  00 - instA:.a
00000001  01 - instA:.b
00000002  02 - instB.a
00000003  03 - instB.b
00000004  a0 00 00 - mov al, [instA.a]
00000007  8a  26 01 00 - mov ah, [instA.b]
0000000B  8a 1e 02 00 - mov bl, [instB.a]
0000000F  8a 3e 03 00 - mov bl, [instB.a]

30 Apr 2025, 13:56

Roman

Joined: 21 Apr 2012
Posts: 2019

Roman 30 Apr 2025, 18:09

Quote:

instB B

struc can see name instB.
This could using for tricky.

add B ;mean struc B do add
sub B ;mean struc B do sub

Code:

;something like this
if . eq add
     display '+;'
     end if 
if . eq  sub
      display '-;' 
      end if

Last edited by Roman on 30 Apr 2025, 18:32; edited 1 time in total

30 Apr 2025, 18:09

macomics

Joined: 26 Jan 2021
Posts: 1197
Location: Russia

macomics 30 Apr 2025, 18:20

Code:

struc N [A] { forward . eax, A }
add N 5, ebx, 10, ecx

Code:

$ hexdump -C struc_and_macro.bin
00000000  00 01 02 03 a0 00 00 8a  26 01 00 8a 1e 02 00 8a  |........&.......|
00000010  3e 03 00 66 83 c0 05 66  01 d8 66 83 c0 0a 66 01  |>..f...f..f...f.|
00000020  c8                                                |.|

Code:

00000013  66 83 c0 05
; add eax, 5

00000017  66 01 d8
; add eax, ebx

0000001A  66 83 c0 0a
; add eax, 10

0000001E  66 01 c8
; add eax, ecx

30 Apr 2025, 18:20

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