TASM -> FASM syntax question.

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FASMresearcher

Joined: 28 May 2008
Posts: 24

FASMresearcher 02 Jun 2008, 08:33

Hi all!
Is it possible to use in FASM the following syntax, which is allowable in TASM:

Code:

table_1     equ offset tables
table_2    equ offset tables + 300h
table_3     equ offset tables + 400h

begin:
........

tables:
end begin

I want to generate tables during code execution and append them to the end.
How I can do it?

02 Jun 2008, 08:33

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20299
Location: In your JS exploiting you and your system

revolution 02 Jun 2008, 09:15

Sure you can, just remove the word "offset".

02 Jun 2008, 09:15

FASMresearcher

Joined: 28 May 2008
Posts: 24

FASMresearcher 02 Jun 2008, 10:06

Great thanks! Smile

02 Jun 2008, 10:06

DOS386

Joined: 08 Dec 2006
Posts: 1900

DOS386 02 Jun 2008, 23:29

> want to generate tables during code execution and append them to the end

Of what ? Confused

_________________
Bug Nr.: 12345

Title: Hello World program compiles to 100 KB !!!

Status: Closed: NOT a Bug

02 Jun 2008, 23:29

SFeLi

Joined: 03 Nov 2004
Posts: 138

SFeLi 03 Jun 2008, 05:18

Code:

begin:
........

;end begin
table_1 rb 0x0300
table_2 rb 0x0100
table_3 rb 0x????

03 Jun 2008, 05:18

Picnic

Joined: 05 May 2007
Posts: 1389
Location: Piraeus, Greece

Picnic 10 Apr 2010, 20:15

Good evening,

I would like to ask a question.
How such TASM declarations translated in fasm syntax.

Code:

mystruc struc
     string db 20 dup (0h)
     n db 0h
mystruc ends

table   mystruc <'One',const1>
        mystruc <'Two',const2>
        mystruc <'Three',const3>           
        mystruc <0>

Is it like this? (un-elegant)

Code:

table    db 'One' 
         db 17 dup 0, const1
         db 'Two'
         db 17 dup 0, const2 
         db 'Three'
         db 16 dup 0, const3
         db 0

10 Apr 2010, 20:15

shutdownall

Joined: 02 Apr 2010
Posts: 517
Location: Munich

shutdownall 10 Apr 2010, 20:58

I think there is an error.
Three has 5 characters so your constant should be 15 instead of 16.
Better to use a macro I think.

Code:

macro myTASMmacro data,constx
{
  local cnt1,cnt2
cnt1:
  db data
cnt2:
  db count-(cnt2-cnt1) dup 0
  db constx
} 

; and then use

table myTASMmacro 'One',const1
        myTASMmacro 'Two',const2
        myTASMmacro 'Three',const3
        db 0

10 Apr 2010, 20:58

nop

Joined: 01 Sep 2008
Posts: 165
Location: right here left there

nop 10 Apr 2010, 21:37

revolution wrote:

Sure you can, just remove the word "offset".

or keep the TASM syntax but add

Code:

offset equ

10 Apr 2010, 21:37

Picnic

Joined: 05 May 2007
Posts: 1389
Location: Piraeus, Greece

Picnic 11 Apr 2010, 00:26

shutdownall wrote:

Better to use a macro I think.

Yes, a macro can do the job easy.

Fasm syntax is very close to Tasm ideal mode, that is a feature i always like in fasm. Razz

11 Apr 2010, 00:26

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 11 Apr 2010, 01:42

shutdownall,

That won't compile.

myTASMmacro macro name would not be recognized as its invocation if it is second token on the line (not counting label_name: definitions), because it's macro macro Wink

. Use struc macro and make macro thunk:

Code:

struc mystruc string, n {
.string db string
        db .string+20-$ dup 0
.n      db n+0
}

macro mystruc string, n {
  local .
  . mystruc string, n
}

table   mystruc 'One',const1
        mystruc 'Two',const2
        mystruc 'Three',const3
        mystruc 0

----------
Picnic,

Basic headers contain struct macro:

Code:

        include "Win32A.Inc"

struct mystruct
string  db 20 dup 0
n       db 0
ends

table2  mystruct 'One',const1
        mystruct 'Two',const2
        mystruct 'Three',const3
        mystruct 0

Hope this helps.

11 Apr 2010, 01:42

Picnic

Joined: 05 May 2007
Posts: 1389
Location: Piraeus, Greece

Picnic 11 Apr 2010, 13:17

It does baldr, and this way it declares sizeof. automatically, i omit that.

11 Apr 2010, 13:17

shutdownall

Joined: 02 Apr 2010
Posts: 517
Location: Munich

shutdownall 11 Apr 2010, 21:17

baldr wrote:

shutdownall,

That won't compile.

You are right, i forgot ":" after table and count has to be replaced by constant 20.
But your solution is more elegant, I think.
Wink

11 Apr 2010, 21:17

monk

Joined: 09 Mar 2011
Posts: 2

monk 15 Mar 2011, 06:34

I've a question how to translate that code[tasm] in fasm:
MOV AH,0AH
LEA DX,NAMEPAR
INT 21H
mov ah,9
mov dx, NAMEFLD
int 21h
;-------------------------------------------------------
NAMEPAR LABEL BYTE
MAXLEN DB 20
ACTLEN DB ?
NAMEFLD DB 20 DUP (?)

15 Mar 2011, 06:34

Picnic

Joined: 05 May 2007
Posts: 1389
Location: Piraeus, Greece

Picnic 15 Mar 2011, 14:06

Hi,

Try this, and also check daluca's post here

Code:

ORG 100H
MOV AH,0AH
MOV DX,NAMEPAR
INT 21H

MOV AH,9
MOV DX, NAMEFLD
INT 21H
RET

NAMEPAR:
MAXLEN DB 20
ACTLEN DB ?
NAMEFLD DB 20 DUP ("$")

15 Mar 2011, 14:06

monk

Joined: 09 Mar 2011
Posts: 2

monk 16 Mar 2011, 05:59

Thank you very much !

16 Mar 2011, 05:59

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