[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1078892
Title:
qemu doesn't general protection fault if there are reserved bits set
in page-directory-pointer table entries
Status in QEMU:
Expired
Bug description:
While working on implementing 32-bit PAE mode in a custom operating
system, which I was testing in QEMU, I noticed that my OS worked
correctly, but resulted in a general protection fault when booted on
VMware, VirtualBox, or bochs.
According to the Intel Architecture Manual, Volume 3A, Section 4.4.1
"PDPTE Registers", "If any of the PDPTEs sets both the P flag (bit 0)
and any reserved bit, the MOV to CR instruction causes a general-
protection exception (#GP(0)) and the PDPTEs are not loaded." QEMU
does not emulate this behavior.
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