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Re: 64-bit gotcha

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On 12/4/11 4:33 PM, Joshua Cranmer wrote:
> [...]
> It still wouldn't be impossible to make 32-from-64 to work, but it would
> certainly require IPC between a 64-bit real process and a 32-bit shadow
> process; given undecidability of pointer aliasing (plus loads of pointer
> punning), it would probably require nontrivial tailoring the 32-bit
> process to get this to work--which raises the question of why not
> translate it to 64-bit code in the first place.

Note that on Windows, COM already includes this sort of cross-process 
marshaling.  So at least out-of-proc COM servers already automatically 
support cross-bitness scenarios.

But of course, that applies only to COM servers.  Plain vanilla DLLs 
would not have this infrastructure already built in.

Pete

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Thread

64-bit gotcha Roedy Green <see_website@mindprod.com.invalid> - 2011-12-03 02:47 -0800
  Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2011-12-03 15:20 -0500
    Re: 64-bit gotcha Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-03 14:01 -0800
      Re: 64-bit gotcha Roedy Green <see_website@mindprod.com.invalid> - 2011-12-03 18:17 -0800
        Re: 64-bit gotcha Martin Gregorie <martin@address-in-sig.invalid> - 2011-12-04 12:06 +0000
          Re: 64-bit gotcha Jeff Higgins <jeff@invalid.invalid> - 2011-12-04 08:57 -0500
            Re: 64-bit gotcha Jeff Higgins <jeff@invalid.invalid> - 2012-02-25 19:15 -0500
              Re: 64-bit gotcha Martin Gregorie <martin@address-in-sig.invalid> - 2012-02-26 00:53 +0000
                Re: 64-bit gotcha Jeff Higgins <jeff@invalid.invalid> - 2012-02-25 20:26 -0500
          Re: 64-bit gotcha Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-12-04 10:04 -0400
        Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 19:50 -0400
      Re: 64-bit gotcha Travers Naran <tnaran@gmail.com> - 2011-12-04 09:17 -0800
      Re: 64-bit gotcha Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-12-04 18:33 -0600
        Re: 64-bit gotcha Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-04 16:56 -0800
        Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 19:53 -0400
      Re: 64-bit gotcha Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 19:49 -0400

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