Is there any function to resize section/segment after modification?

[vegedreamgagnoa]

It seems like strongarm does not automatically resize/readjust section/segment size after modification. If the provided data has more length or size than the actual data (I am trying to edit a string here), then it will also overflow/leak into the next section.

How can I implement this feature? Do you have any suggestion? @codyd51

Thanks.

[codyd51]

Hi! strongarm doesn't currently automatically resize the container structures for you. For now, you'll have to update the size pointers in the container structure by hand. If the data you'd like to write would spill over into the next section, you may have to shift all the following structures in the binary forward. This'll involve lots of pointer rewriting, and you may also need to update the dyld rebasing data; I think this case would be a complicated effort. I would happily welcome a PR if either of these are functionality you're willing to implement!

[codyd51]

Worth noting: MachoBinary.insert_load_dylib_cmd (here) handles updating some segment metadata, as an example.