flat assembler

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shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 01 Jun 2005, 18:14

is there one in FASM like the C language?

01 Jun 2005, 18:14

Barf

Joined: 17 Sep 2004
Posts: 34
Location: Poland

Barf 01 Jun 2005, 18:48

try to check in winapi documentation. If you haven`t it mail me: barf@o2.pl, i will send it you. I won`t post it here because it has 10MB.

01 Jun 2005, 18:48

shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 01 Jun 2005, 19:05

Sorry, I meant is there a way to calculate the size of a structure like

Code:

sizeof(my_struct)

in FASM like in the C language?

01 Jun 2005, 19:05

Torrey

Joined: 12 Oct 2003
Posts: 78

Torrey 01 Jun 2005, 19:14

Sometimes I do this:

Code:

struc my_struct
{
   .variable1 dd ?
   .variable2 dd ?
   .variable3 dd ?
   .variable4 dd ?
   .variable5 dd ?
   .size        = $-.variable1
}

01 Jun 2005, 19:14

shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 01 Jun 2005, 19:27

Torrey wrote:

Sometimes I do this:

Code:

struc my_struct
{
   .variable1 dd ?
   .variable2 dd ?
   .variable3 dd ?
   .variable4 dd ?
   .variable5 dd ?
   .size        = $-.variable1
}

So would this calculate the complete size of my_struct variable1-5?

01 Jun 2005, 19:27

decard

Joined: 11 Sep 2003
Posts: 1092
Location: Poland

decard 01 Jun 2005, 19:43

yes

You can also declare structures this way:

Code:

struct my_struct
   .variable1 dd ?
   .variable2 dd ?
   .variable3 dd ?
   .variable4 dd ?
   .variable5 dd ?
ends

This will automatically define sizeof.my_struct that will contain structure's size. You have to include standard macro library (win32a.inc) of course.

01 Jun 2005, 19:43

shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 01 Jun 2005, 20:26

decard wrote:

yes
You can also declare structures this way:
Code:
struct my_struct
   .variable1 dd ?
   .variable2 dd ?
   .variable3 dd ?
   .variable4 dd ?
   .variable5 dd ?
ends    
This will automatically define sizeof.my_struct that will contain structure's size. You have to include standard macro library (win32a.inc) of course.

Ok so I can lets say

Code:

mov [wndclass.cbsize], sizeof.wndclass

then?

01 Jun 2005, 20:26

decard

Joined: 11 Sep 2003
Posts: 1092
Location: Poland

decard 01 Jun 2005, 21:12

yes

01 Jun 2005, 21:12

shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 01 Jun 2005, 23:28

Hmmm it didn't work and I have the win32a.inc included. Any suggestions?

01 Jun 2005, 23:28

beppe85

Joined: 23 Oct 2004
Posts: 181

beppe85 02 Jun 2005, 03:10

What fasm returns to you(error description)?

02 Jun 2005, 03:10

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20416
Location: In your JS exploiting you and your system

revolution 02 Jun 2005, 03:48

The structure names are defined in upper case:

Code:

wndclass WNDCLASS
mov [wndclass.cbsize], sizeof.WNDCLASS

02 Jun 2005, 03:48

veach1

Joined: 16 Jul 2004
Posts: 165

veach1 02 Jun 2005, 06:23

And what about "sizeof" not for structures but for variables?

02 Jun 2005, 06:23

shaolin007

Joined: 03 Sep 2004
Posts: 65

shaolin007 02 Jun 2005, 12:13

revolution wrote:

The structure names are defined in upper case:
Code:
wndclass WNDCLASS
mov [wndclass.cbsize], sizeof.WNDCLASS
    

Thankyou very much that worked.

02 Jun 2005, 12:13

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