[Xen-devel] Re: user/hypervisor address space solution

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 14 Feb 2006, at 00:06, Hollis Blanchard wrote:

> Ok, so what I'm hearing is that copy_to/from_user() and get/put_user()
> should take unsigned long and not void*.
I'd prefer a type that can't be directly manipulated by standard 
operators. In fact, a family of types that would allow us to 
differentiate between references to different types (e.g., unsigned 
long * versus multicall_entry_t *).
Perhaps replace 'foo *name' in public structures with 
'XENPARM_HANDLE(foo, name)'.
The uaccess macros then take xenparm handles plus an offset. The macros 
would need a bit of CPP magic to make them suitably polymorphic.
 -- Keir


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