[Fink-devel] Prebinding: Got Slid? revisited

[Carsten Klapp]

I finally tracked down some useful information which seems related to that "got slid" prebinding warning message.

Apparently in 10.2, redo_prebinding can *slide* the seg1addr of a dynamiclib to another location. A master lookup file is required which would contain a list of all the library names and the addresses to use.

example:
sudo redo_prebinding -seg_addr_table /sw/fink/share/redo_prebinding/seg_addr_table /sw/lib/libjpeg.62.0.0.dylib
sudo redo_prebinding -seg_addr_table /sw/fink/share/redo_prebinding/seg_addr_table /sw/lib/libtiff.3.5.7.dylib

What I see this to mean is fink might be able to build any dylib prebound with a single static address (arbitrarily chosen for convenience), then run redo_prebinding on it at the end of the compile to specify our own seg1addr_table file. This way everyone builds or downloads the same binary from fink and will use the same seg1addresses as everyone else. Also this gives us a nice single repository for maintaining all of fink's prebinding addresses. There is also a perl interface for doing this: use RedoPrebinding (redo_prebinding(3)).

I imagine Apple has such a seg_addr_table list internally for use with all it's frameworks and dylibs. Now we need to get our hands on one to find out what the format of this file is.

Carsten

http://web.mit.edu/darwin/src/modules/cctools/RelNotes/ Private_CompilerTools.html
http://www.hmug.org/man/1/redo_prebinding.html
http://www.hmug.org/man/3/RedoPrebinding.html
http://www.omnigroup.com/mailman/archive/macosx-dev/2001-August/ 018370.html



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