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Re: [Xen-devel] 32/64-bit hypercall interface - padding

from [Hollis Blanchard] [Permanent Link][Original]
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] 32/64-bit hypercall interface - padding
From: Hollis Blanchard <hollisb@xxxxxxxxxx>
Date: Tue, 4 Oct 2005 16:41:43 -0500
Cc: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
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On Tuesday 04 October 2005 11:39, Keir Fraser wrote:
>
> I don;t want to lose pointer type checks. The manual (u64)(unsigned
> long) casting is gross and loses type checking.

Fair enough.

Actually, another thought... have a look at the attached proof-of-concept 
patch. That preserves pointer type safety while still guaranteeing size and 
alignment.

> > I don't like calling it a "ulong," because it isn't, and neither is it
> > a "register" size...
>
> Then what will you call it? xenppchack_t? :-)

:)

-- 
Hollis Blanchard
IBM Linux Technology Center

Attachment: xen-ptr-union.diff
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