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1. (WO2017036376) DATA ACCESS METHOD, CODE CALLING METHOD, AND VIRTUAL MACHINE MONITOR

Pub. No.:    WO/2017/036376    International Application No.:    PCT/CN2016/097246
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Aug 30 01:59:59 CEST 2016
IPC: G06F 9/455
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: LI, Hui
李辉
CHEN, Xingshu
陈兴蜀
ZHANG, Xiangfeng
张相锋
Title: DATA ACCESS METHOD, CODE CALLING METHOD, AND VIRTUAL MACHINE MONITOR
Abstract:
A data access method, a code calling method, and a virtual machine monitor (VMM). The data access method comprises: a VMM captures a page table interrupt event (S201); the VMM determines via a prestored page table interrupt processing function whether or not a target kernel module has the permission to access kernel data in a K-SPACE (S202); when the VMM determines via the prestored page table interrupt processing function that the target kernel module has the permission to access the kernel data in the K-SPACE, the VMM creates in an MPGT a mapping of the permission of the target kernel module to access the kernel data in the K-SPACE, thus allowing the target kernel module to have the permission to access the kernel data in the K-SPACE (S203). The method facilitates increased security of system kernel data access and code calling.