FASM equivalent of MASM

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prino

Joined: 24 Jun 2004
Posts: 20

prino 09 Jun 2010, 21:52

Can anyone tell me what the FASM equivalent of the following MASM code is:

Code:

    .686
    .model flat
    .code
public ?RDTSC

?RDTSC    proc
    rdtsc
    ret
?RDTSC    endp
end

Assemble using 'ml -c -coff file.asm'.

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Robert AH Prins
robert dot ah dot prins at the big account from Google Wink

09 Jun 2010, 21:52

edfed

Joined: 20 Feb 2006
Posts: 4335
Location: Now

edfed 09 Jun 2010, 22:02

Code:

format coff
public ?RDTSC  ;don't know if public is a valid fasm directive...
?RDTSC:          
       rdtsc
       ret

i think it is that.. am i right?

[edit]

i shut my mouth and just write, ... I don't know.

09 Jun 2010, 22:02

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 10 Jun 2010, 15:13

Strictly speaking, the "PROCD" in MASM by default also generates the stack frame (push ebp / mov ebp, esp), which isn't present in edfed's example. But it's not needed here.

10 Jun 2010, 15:13

edfed

Joined: 20 Feb 2006
Posts: 4335
Location: Now

edfed 10 Jun 2010, 15:19

ok!
then, if i understand:

Code:

proc:
     push ebp
     mov ebp,esp
     ...
     pop ebp
     ret

10 Jun 2010, 15:19

prino

Joined: 24 Jun 2004
Posts: 20

prino 10 Jun 2010, 15:39

It worked, thanks!

10 Jun 2010, 15:39

ass0

Joined: 31 Dec 2008
Posts: 518
Location: ( . Y . )

ass0 10 Jun 2010, 19:51

Code:

proc:
push ebp
mov ebp,esp
...
mov esp,ebp ; =D
pop ebp
ret

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Nombre: Aquiles Castro.
Location2: about:robots

10 Jun 2010, 19:51

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 10 Jun 2010, 20:02

ass0,

How about leave? Wink

10 Jun 2010, 20:02

ass0

Joined: 31 Dec 2008
Posts: 518
Location: ( . Y . )

ass0 10 Jun 2010, 20:54

enter 0,0 ==
push ebp
mov ebp,esp

leave ==
mov esp,ebp
pop ebp

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Nombre: Aquiles Castro.
Location2: about:robots

10 Jun 2010, 20:54

Japheth

Joined: 26 Oct 2004
Posts: 151

Japheth 11 Jun 2010, 04:34

Masm won't generate a stack frame if there are no parameters or locals - unless you force it by adding the FORCEFRAME attribute to PROC.

11 Jun 2010, 04:34

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