🚀 go-pugleaf

In article <D%%X9.572$XV3.3763597586@newssvr17.news.prodigy.com>,
 "Raymond" <ray@powerproduction.com> wrote:

>hi
>
>I'm building an app (MachO format) which links against a private framework
>for some core functionality. (Windowing API wrappers, etc.)
>On launch this app loads additional plugins which extend its functionality.
>( Using: CFBundleCreate & CFBundleGetFunctionPointerForName )
>
>When I compile/link these "plugin" frameworks, I see this sort of warning
>message (around 5 or 6 of them per plugin):
>
>-----------------
>dynamic library
>'@executable_path/../Frameworks/PPSFramework.framework/Versions/A/PPSFramewo
>rk'   section '__TEXT' ($01000000-$01039000)
>overlaps with output file section '__TEXT' ($01000000-$01007000)
>(need to run redo_prebinding)
>----------------
>("PPSFramework" is the name of the private framework with Windowing API
>wrappers, and "output file section" is the extension plugin which gets
>dynamically loaded.)
>
>
>If I "Disable Pre-Binding" these warning go away, but boty ways my string
>literals are corrupt after loading these plugins
> (and I guess it is because of "section collision")
>
 Prebinding (which is on by default), requires that all dynamic 
libraries used by the application don't have addresses which overlap. 
The dynamic loader can deal with the problem (which is why these are 
only warnings), but the code will run slow as it will require a dynamic 
fixup to it's relocations.

You should build your dynamic library with a different starting address 
using the option -seg1addr long, the Metrowerks makes the default for 
a .dylib to be 0x01 000000 (default for a application/executable is 
0x1000). Most of the system libraries are at addresses > 0x80000000

Ron

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