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Re: problem with kext compiled under tiger...


  We just ran into the same problem while at WWDC.  If you use the command:

nm /System/Library/Extensions/System.kext/Plugins/IOKit.kext/IOKit | grep UserClient17setAsync | c++filt
you'll get the results:
         U IOUserClient::setAsyncReference(unsigned int*, ipc_port*, void*, void*)

   Speaking with one of the IOKit team, it seems that the header file in the framework does not match the symbol exposed in the kernel.  So, although the function prototype actually did change, we didn't get updated headers.
    I haven't entered a Radar bug on this yet, namely because we told the IOKit team member.  It wouldn't hurt to enter a bug, just so they have something to track.  

Kris Daniel
Line 6, Inc.


On Jun 15, 2005, at 10:30 AM, rimas wrote:


i recently recompiled my KEXT on a machine running Tiger.  When I try to kextload it I get the following error message:


kld(): Undefined symbols:

__ZN12IOUserClient17setAsyncReferenceEPjjPvS1_


doing an nm /System/Library/Extensions/System.kext/Plugins/IOKit.kext/IOKit | grep UserClient17setAsync


i see


U __ZN12IOUserClient17setAsyncReferenceEPjP8ipc_portPvS3_


so it looks like the arguments to the function have changed or something ? (sorry i'm not exactly sure how to interpret the alphanumeric characters after the function name).  The prototype in IOUserClient.h doesn't seem to have changed...



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