tree b65cb9e1ff5673b360dda5738fa1c4ab512573b1
parent 9bd4cfc493257a03794997896aa1642836fc3b45
author bart <bart@a5019735-40e9-0310-863c-91ae7b9d1cf9> 1385895354 +0000
committer bart <bart@a5019735-40e9-0310-863c-91ae7b9d1cf9> 1385895354 +0000

xen: XEN_DOMCTL_gethvmcontext hypercall

The semantics of XEN_DOMCTL_gethvmcontext are little interesting.

If the 'buffer' field of the structure is NULL, the hypercall is a request for
the required buffer size, which written into the 'size' paramater.

If 'buffer' is non NULL, Xen will write to the buffer, and update 'size' with
the amount of data written.

From: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13732 a5019735-40e9-0310-863c-91ae7b9d1cf9