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setcenter
2008 Oct 23
5
Why using hypercall_page ?
Hello,
I am studing Xen hypercall now. I found that hypercall is invoked via
hypercall_page, which is only filled with (in
no-hypervisor-kernel-mode ):
mov $i, %eax
int $0x82
ret
Why not invoked the hypercall directly by "int $0x82" ? What''s the
advantage of using hypercall_page?
Thanks,
Wu
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