fasm -> masm

[Doug Herr]

Hi, new member here.  I have a project that was written initially in fasm and the higher-ups now want me to translate to MASM.  I'm a dinosaur, I used MASM many years ago starting with 5.0 so not a total newbie.

The current project is a 32-bit DLL.  I don't need to change the function of the DLL, just tweak the source code into MASM.  Any pointers (pun intended) will be appreciated, thanks!

[jj2007]

Doug

Welcome in dinosaur land :icon14:

There is AFAIK no automatic translation around; inter alia because the FASM crew believe they are better than we are, and we do the same, so no need for translation :icon_mrgreen:

However, if you post a significant excerpt of your code, we'll be able to judge how much effort it needs. Masm32 has powerful library functions, and so does MasmBasic.

How many lines in total?

[Doug Herr]

This project has thousands of lines of code  :icon_eek:

Most of what I need help with is DLL startup code; how do I make the functions in the DLL visible to a calling program, are there any tricks to linking, also how do I call functions in another DLL.  I know how to do this with the other assembler (is speaking its name allowed?), but so far the syntax for MASM code has eluded me.

[Doug Herr]

Sooo.... I've found a simpledll4.zip pointed to by Vortex in http://masm32.com/board/index.php?topic=156.msg567#msg567

... I'll play with that for a while and see what mess I can make 

It looks like in x64code's sample code (first post in the thread) imported functions are pulled in & linked from a .lib, correct?  I want to import functions in other DLLs.

[dedndave]

for a project that large, i might consider writing a program to convert the source   :P

the differences between fasm and masm aren't that hard to overcome

[jj2007]

for a project that large, i might consider writing a program to convert the source   :P

Yes indeed, that's why I pointed a Replace$() ;-)

I am on a sloooow line and on holidays, too, so currently I can't be helpful. When do you need it?

[Force]

MyDll.DEF

Code Select Expand

LIBRARY mydll
EXPORTS AddProc


[Vortex]

Hi Doug Herr,

Here is a Fasm example for you.

[Gunther]

Hi Doug,

welcome to the forum.

I think that the syntax differences between MASM and FASM aren't so hard. A few changes here and there seems possible. The main difference is: FASM hasn't command line switches. One has to write every switch into the source file.

Gunther

[jj2007]

Hi Doug Herr,

Here is a Fasm example for you.

Thanks, Erol.

Main differences are:
- headers, sections etc: should be done by hand
- procs:
proc DlgProc,hWnd,uMsg,wParam,lParam
....
endp

DlgProc proc hWnd,uMsg,wParam,lParam
....
DlgProc endp

- mov [hDC], eax is mov hDC, eax in Masm, but ML reads also the [clumsy] [version]
- if a,e,b: that seems to be if a==b, right? No big deal for a parser, but check carefully if there is any ambiguity.

[Doug Herr]

My first project is almost complete (a utility DLL that is used by most of my other programs) except for one thing: ML is setting my external references to all caps, so polink can't find the references in case-sensitive libraries.  I'm using ML's /Cx switch which is supposed to preserve the case of externals, but when I examine the .obj file the external references have been changed to all caps.  What am I doing wrong?

[dedndave]

Code Select Expand

    OPTION  CaseMap:None

[Doug Herr]

Code Select Expand

    OPTION  CaseMap:None

Where is this used?

[Vortex]

At the top of the source file :

Code Select Expand

.386
.model flat,stdcall
option casemap:none

[Doug Herr]

At the top of the source file :

Code Select Expand

.386
.model flat,stdcall
option casemap:none

No joy  :(

EDIT: problem solved, thanks