Add execute rights to a VMO.
#include <zircon/syscalls.h> zx_status_t zx_vmo_replace_as_executable(zx_handle_t handle, zx_handle_t vmex, zx_handle_t* out);
zx_vmo_replace_as_executable() creates a replacement for handle, referring
to the same underlying VM object, adding the right ZX_RIGHT_EXECUTE.
handle is always invalidated.
vmex may currently be ZX_HANDLE_INVALID to ease migration of new code, this is TODO(SEC-42) and will be removed.
handle must be of type ZX_OBJ_TYPE_VMO.
vmex must have resource kind ZX_RSRC_KIND_VMEX.
zx_vmo_replace_as_executable() returns ZX_OK on success. In the event
of failure, a negative error value is returned.
ZX_ERR_BAD_HANDLE handle isn't a valid VM object handle, or vmex isn't a valid ZX_RSRC_KIND_VMEX resource handle.
ZX_ERR_NO_MEMORY Failure due to lack of memory. There is no good way for userspace to handle this (unlikely) error. In a future build this error will no longer occur.
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