Method and system for providing user space address protection from writable memory area in a virtual environment
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United States of America Patent
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Dec 25, 2012
Grant Date -
Feb 24, 2011
app pub date -
Aug 21, 2009
filing date -
Aug 21, 2009
priority date (Note) -
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Abstract
A method in one example implementation includes identifying an address space in a memory element of a system configured to operate in a virtual environment. The address space includes at least one system address, and the address space is provided to a virtual machine monitor. The method also includes generating a page table entry for the system address in a shadow page table stored in the virtual machine monitor in response to a guest operating system initiating a process. The page table entry is marked as a page not being present in order to trigger a page fault for a system address access from the guest operating system. In more specific embodiments, the method may include evaluating a page fault to determine access to the address space, where access to a writeable area of the memory element is denied.
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