vtable assignment about llvm-mctoll HOT 5 OPEN

Thanks again for testing the tool and providing the encouragement.

We will look at the issues you pointed out - unless you or someone else can beat us by providing a patch to address these issues :-)

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Btw, of course the actual virtual call to foo does not work yet. But that's probably known.

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Yes, you are right. There are a host of extremely interesting C++ idioms to be abstracted (raised) to LLVM IR level once we get a chance to focus on raising C++ binaries.

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PoC: Trass3r@47e61ec

@_ZTV4Base = weak dso_local global [5 x i64] [i64 0, i64 0, i64 4198742, i64 4198744, i64 4198750]

  %1 = getelementptr inbounds [5 x i64], [5 x i64]* @_ZTV4Base, i32 0, i32 2
  %2 = inttoptr i64 %RDI to i64**
  store i64* %1, i64** %2, align 8

Basically works but would require something more sophisticated to avoid false positives and the table entries would have to be converted into actual function pointers.

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Related: 6f71623

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