[Xen-devel] Explicit return type for Hypercall

[Tej <bewith.tej@xxxxxxxxx>]

Hi All

Some basic doubts about Hypercall return type.
If kernel issue a hypercall, and there is no corresponding entry in
entry.S in Hypervisor, it gives weired return type and Kernel
interpret it in completely different manner.

eg in GCOV case, I issued hypercall, when there is no corresponding
entry in Hypervisor, it gives -38<3> as return type. and Kernel Send a
message to userspace (in case of kernel module) as Kernel does not
have module support, which is total misleading.

1. Is this return type is intended?
2. Why there is no interpretation of hypercall return type in kernel?


Hope i am not missing any obvious thing

thanks
-tej

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