On Mon, 2003-06-16 at 18:39, Joe Kelsey wrote:
Has anyone ever come across general-purpose tools for modifying shared libraries? What I want to do is to edit the list of "needed" shared libraries to correct the common mistakes that developers make in creating shared objects with large lists of shared libraries.GNU objcopy --- but it's a bit *too* general; you'd need to extract the .dynamic section, edit it using some binary editing tool, and re-add it.
I have tried and failed... I even looked at the code. objcopy is
horrible as far as it goes. Maybe if I could learn more about bfd in
general, there might be something I could do with objcopy, but it does not look promising.
I doubt there are any tools of the kind you're looking for because the details are too different between different systypes; even if someone had developed one, it's just as likely to be for Linux or Solaris as for *BSD, and as a result wouldn't be particularly useful.
All 32-bit Elf libraries look the same as far as the DT_NEEDED entries in the DYNAMIC section. In fact, *all* ELF libraries look the same relative to the size of the string table offset used for entries. The DYNAMIC section is the simplest of all sections, generally consisting of a tag and a value, both in the native word size (e.g., 32 or 64). I am surprised that no one has done this yet.
I tried elfsh, but the version in ports is too old. I got the most recent version from the website, but it has a lot of linuxisms in it.
Basically, what I want to do is remove several entries from the *front* of the dynamic section. Actually, I would settle for just removing all of a certain tag (such as DT_NEEDED) from the dynamic section.
/Joe
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