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Index > Macroinstructions > How to transfer MASM macro SADD to FASM macro?

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habran



Joined: 31 Aug 2008
Posts: 82
Location: South Australia
habran
Hi Everyone!

Would anybody be able to show me how to transfer MASM macro "SADD" to FASM macro?

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Post 08 Nov 2008, 00:48
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17716
Location: In your JS exploiting you and your system
revolution
It would help if you showed us the macro! Or at the very least, gave a description of it's intended function.

BTW: Would this not come under the "Macroinstructions" section? Perhaps a friendly mod could move it.
Post 08 Nov 2008, 01:00
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habran



Joined: 31 Aug 2008
Posts: 82
Location: South Australia
habran
invoke wsprintf,addr buff,SADD(" Page %i/%i"), nCurrentPage, nCountPage
Post 08 Nov 2008, 01:02
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habran



Joined: 31 Aug 2008
Posts: 82
Location: South Australia
habran
; **********************************************
; The original concept for the following macro *
; was designed by "huh" from New Zealand. *
; **********************************************

; ---------------------
; literal string MACRO
; ---------------------
literal MACRO quoted_text:VARARG
LOCAL local_text
.data
local_text db quoted_text,0
align 4
.code
EXITM <local_text>
ENDM
; --------------------------------
; string address in INVOKE format
; --------------------------------
SADD MACRO quoted_text:VARARG
EXITM <ADDR literal(quoted_text)>
ENDM
Post 08 Nov 2008, 01:05
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17716
Location: In your JS exploiting you and your system
revolution
If you are using the standard macro package in the Windows download of fasm then use this:
Code:
invoke wsprintf,buff," Page %i/%i",[nCurrentPage],[nCountPage]    
Although it is not exactly the same since the string will appear in the code section rather than the data section. If you need your string in the data section then a different technique is required, I can post a link on request if you need it.
Post 08 Nov 2008, 01:08
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
Well, if you include win32{a|w}x.inc you can do 'invoke wsprintf,addr buff," Page %i/%i", nCurrentPage, nCountPage', which gets translated into the following code:
Code:

push nCountPage ; Note that in fasm this and push [nCountPage] has different meaning
push nCurrentPage ; Same as above
call @f
db " Page %i/%i", 0
@@:
lea  edx, [buff]
push edx
call dword [wsprintf]     


But if you use the same strings N times then it will be placed in the executable N times, maybe MASM macro prevents repeated occurrences of the same string. I think that Fresh had some macros to do this but can't check it myself now.

PS: BTW, wasn't this subject discussed less than a month ago?
Post 08 Nov 2008, 01:11
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habran



Joined: 31 Aug 2008
Posts: 82
Location: South Australia
habran
Thanks a lot revolution, that is what I wanted
Post 08 Nov 2008, 01:13
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habran



Joined: 31 Aug 2008
Posts: 82
Location: South Australia
habran
Thanks LocoDelAssembly (I love your pseudonym)

now I have to go but I'll be back!
Post 08 Nov 2008, 01:19
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
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vid
With FASMLIB macro set, that string would go to data section. But you had to use special macro in data section.
Post 08 Nov 2008, 08:09
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baldr



Joined: 19 Mar 2008
Posts: 1651
baldr
User32!wsprintf is a cdecl function, cinvoke it. By the way, cinvoke will properly adjust stack after call.
Post 08 Nov 2008, 10:22
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
Damn, we both failed to see that mistake. Thanks for noting it baldr.
Post 08 Nov 2008, 12:17
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17716
Location: In your JS exploiting you and your system
revolution
Yep, good catch baldr.
Post 08 Nov 2008, 14:20
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alorent



Joined: 05 Dec 2005
Posts: 201
alorent
Hi guys,

vid wrote:
With FASMLIB macro set, that string would go to data section. But you had to use special macro in data section.


I have downloaded FASMLIB but I'm not sure of to use that, vid.

Is it possible to extract that code from FASMLIB and just put it in a new macro "SADD" which just do that or it's not possible?

Thanks!
Post 18 Oct 2009, 06:33
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
I haven't touched FASMLIB for quite some time, but if I remember correctly, what you want is: "idata" macro (macro for collecting data definition), "IncludeIData" macro that must be placed in data section (macro that defines "collected" data) and "libcall" macro (equivalent of "stdcall" or "invoke" macro), that encloses string definitions in "idata" block.

If you don't want to rip out macros, other option is to redefine "stdcall", "ccall", "invoke" and other macros to work in same manner as "libcall", but I don't feel like doing so right now Razz
Post 18 Oct 2009, 14:35
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