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Date: Wed, 12 Mar 2008 12:14:36 +0800
From: David Xu <davidxu@FreeBSD.org>
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To: Jeff Roberson <jroberson@chesapeake.net>
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Cc: arch@FreeBSD.org
Subject: Re: amd64 cpu_switch in C.
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Jeff Roberson wrote:
> http://people.freebsd.org/~jeff/amd64.diff

This is a good idea. In fact, according to calling conversion, some 
registers are not needed to be saved across function call, e.g on
i386, eax, edx, and ecx. :-) but gdb may need them to dig out
stack variable's value.

Regards,
David Xu