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patchable-function Attribute #8

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kavon opened this issue Aug 28, 2019 · 1 comment
Open

patchable-function Attribute #8

kavon opened this issue Aug 28, 2019 · 1 comment
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kavon commented Aug 28, 2019

There seems to be a somewhat new patchable-function attribute for functions that emits a small nop sled at the start of the function that is suitable for a compare-and-swap to redirect control flow via a short jump so that you can overwrite the body of the existing function. It's only supported for x86-64 right now.

Right now we're using XRay to do this and it seems fine and supports more architectures, so it doesn't seem useful, but nonetheless it's worth looking at this again in the future.
@kavon kavon added the question Further information is requested label Aug 28, 2019
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kavon commented Oct 22, 2019

#16 is related to this.

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