Vector35 / Vector35/binaryninja-api
More accurate support for lock prefixed instructions
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Descrizione
First of all, I want to congratulate anyone who works on BN. I'm evaluating replacing my daily reverse engineering tool (which, I guess anyone who reads this already knows him.) with BN. More than that, I feel like I want to work at Vector35. That is what I really feel about BN. So thank you all for putting this effort into this beautiful project. There are a lot of things already in BN that I want to saw in other tools. But of course there are some other things I want to saw in BN, too! So, here is another one for you... I mean, for us...
Currently, BN's decompiler turns this assembly
004010a0 int32_t list_push(struct list_T* list, struct person_T* person)
004010a3 8b4508 mov eax, dword [ebp+0x8 {list}]
004010a6 83c004 add eax, 0x4
004010a9 f0ff00 lock inc dword [eax]
into this in HLIL view:
004010a0 int32_t list_push(struct list_T* list, struct person_T* person)
004010a6 list->size = list->size + 1
I think it would be more accurate if decompiler make us know that this is an interlocked increment. Maybe something like this?
InterlockedIncrement(&list->size);
There are other variations(decrement, compare etc..) too for sure. Support for all of them in a release would be very pleasant.
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Direzione di ricerca
Start by locating the HLIL decompiler handling for lock-prefixed instructions, using the assembly and HLIL examples in the issue as the behavioral reference. The change should preserve the interlocked meaning of increment, decrement, compare, and other lock-prefixed operations rather than presenting them as ordinary arithmetic.
Scritto dal modello di indicizzazione a partire dal testo della issue.
Valutazione
- Stack tecnologico
- cpp
- Ambito
- compilers, reverse-engineering
- Tipo di issue
- Funzionalità
- Difficoltà
- 4/5
- Tempo stimato
- 3-5 giorni
- Stato di attività
- Ferma
- Chiarezza
- Abbastanza chiara
- Idoneità per principianti
- 35/100