BACKGROUND Many computer systems utilize virtualized memory for security, stability and/or other purposes. In various virtualized-memory systems, a virtual machine monitor ("VMM") may control direct use of memory and/or computer processors in a…
BACKGROUND Malicious code, known as malware, which includes viruses, worms, adware, etc., may attack core components of the operating system to compromise key applications, including critical applications that operate in the operating system kernel,…
A processor including a virtualization system of the processor with a memory virtualization support system to map a reference to guest-physical memory made by guest software executable on a virtual machine which in turn is executable on a host machin…
To translate a virtual address into a physical one, the CPU must take the contents of each level field, convert it into an offset into the physical page containing the Page Table and read the PFN of the next level of Page Table. This is repeated thre…
10.3 Switching to Protected Mode 切换到保护模式 Setting the PE bit of the MSW in CR0 causes the 80386 to begin executing in protected mode. The current privilege level (CPL) starts at zero. The segment registers continue to point to the same linear address…
