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Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X


From: C . W . Betts
Subject: Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X
Date: Mon, 26 Jan 2009 17:40:16 -0700

I think like all X86_64 programs, it has access to more registers than just plain i386. However, that is only on the X86 platform: the PowerPC platform has the same number of registers in both 32 and 64- bit mode.
On Jan 26, 2009, at 8:40 AM, Anthony Liguori wrote:

Alexander Graf wrote:
Mac OS X 10.5 supports 64-bit userspace on an x86_64 kernel and
by default uses 32-bit userspace applications, so the detection for
the host architecture fails.

This patch enabled building of x86_64 code on x86_64 capable CPUS
with Mac OS X.

Applied.  Thanks.

Out of curiousity, what are the benefits of using 64-bit apps in OS X? I guess greater memory addressability is important for QEMU.

Regards,

Anthony Liguori










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