[gmpi] Re: MacOS vtable reserved field

  • From: Matthew Xavier Mora <mxmora@xxxxxxxxx>
  • To: gmpi@xxxxxxxxxxxxx
  • Date: Tue, 22 Feb 2005 13:09:34 -0800

At 9:43 PM +1300 2/22/05, Jeff McClintock wrote:

> Can any of you Mac users point me to a document about the "required"
reserved field in a Mac COM vtable? Is it for real?

"Every vbtable entry is four bytes long. The first entry is always zero, representing the offset of the derived class in itself"

http://developer.apple.com/tools/mpw-tools/compilers/docs/abi_spec.pdf

That was pre Mac OS X. There is new ABI for Mac OS X. (Yes, take a perfectly good ABI and toss it for one designed to run on intel hardware.
Sorry, the new ABI is a sore spot for us old mac hackers. :-))


<http://developer.apple.com/documentation/DeveloperTools/Conceptual/MachORuntime/MachORuntime.pdf>

Matt

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