site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com On Thu, 28 Oct 2004, Quinn wrote:

At 10:10 -0500 26/10/04, Jay A. Kreibich wrote:

...

The big question is how the kernel is going to run.

The Tiger kernel will run 32 bit, even on G5. That is, sizeof(void *) == 4 for kernel code.

Portions of the kernel have been modified to support 64 bit user address spaces but those portions represent user addresses using a 64 bit integer type (that is, they don't use a C pointer).

So the Tiger release: * has a 32-bit kernel address space regardless of host CPU; * has some system libraries optimized for the host CPU, which includes taking advantage of 64-bit operations when on G5; * supports 32-bit user address spaces on any CPU, and additionally 64-bit user address spaces (depending on whether the binary is 32/64-bit) on G5. Is this an accurate summary? Cheers, Koryn -- Dr Koryn Grant phone +64 7 8346729 Software Engineering Manager mobile +64 21 488386 Endace Technology Ltd email koryn@endace.com Hamilton, New Zealand web http://www.endace.com/ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com