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View thread "distorm and Yasm"
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| Views: 3240 | Replies:
3 | Posting Date: 2007-04-06 07:47:08
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Thread Starter:
anon |
Hi Arkon,
Do you know if the assembly generated by distorm
can be reassembled using Yasm?
Thx,
anon
| arkon
Posted at:
2007-04-06 08:51:38 |
Re: distorm and Yasm
Hello
I assume there are some extreme cases where they won't work well together, but with most stuff it seems to work just fine.
For example something basic that doesn't work:
diStorm decodes output in SEG:[xxx] way:
MOV FS:[EAX], DWORD 0
YASM must be feeded with:
MOV [FS:EAX], DWORD 0
Another example with FPU:
diStorm: FADD ST, ST(1)
YASM: FADD ST0, ST1
Anyways, when diStorm and YASM will be merged in some way, Peter and I will do our best to make it a perfect match.
These issues can be fixed easily from diStorm, I don't really know the YASM code. If you're willing to help to find these differences I'm willing to apply the changed immediately.
However, I hope it won't break compatibility with current projects that use diStorm already.
FYI: What I did for testing was to assemble some lines with YASM and then disassemble them with diStorm, and then re-assemble them in YASM and examine the results.
Thanks | anon
Posted at:
2007-04-08 05:59:03 |
Re: distorm and Yasm
Thanks 4 your replay.
SInce it seems my best option right now
I will probably try to use distorm with Yasm.
I will post when I find problems. When
Will you fix the issues you metioned?
btw,
Will dislib support pe file writing?
http://dkbza.org/pefile.html seems more
complete then dislib.
Any reason to use dislib instead?
Thanks,
anon. | arkon
Posted at:
2007-04-08 06:04:11 |
Re: distorm and Yasm
In a couple of months after I notify on the page what the changes are going to be. So I want to gather them all and do it in on shot.
Nope, diSlib is for reading only.
I never actually took a look at pefile library. So I can't tell the difference.
I wrote diSlib because I wanted my own library that I know its code and can tweak quickly and add stuff. I wanted something that gives you all imports/exports/relocations in a jiffy without any problem. And that's what I did. The other libraries seemed to be complex and give you tones of unused data. I needed something simple and strict. But again, didn't take a look at them. You should consider them on your own  |
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