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Diffstat (limited to 'results/classifier/108/other/1078892')
| -rw-r--r-- | results/classifier/108/other/1078892 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/results/classifier/108/other/1078892 b/results/classifier/108/other/1078892 new file mode 100644 index 000000000..c7ed95ef2 --- /dev/null +++ b/results/classifier/108/other/1078892 @@ -0,0 +1,26 @@ +device: 0.781 +boot: 0.714 +graphic: 0.701 +vnc: 0.544 +semantic: 0.510 +other: 0.462 +files: 0.395 +network: 0.376 +socket: 0.350 +performance: 0.290 +permissions: 0.287 +PID: 0.253 +debug: 0.231 +KVM: 0.114 + +qemu doesn't general protection fault if there are reserved bits set in page-directory-pointer table entries + +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. + +Triaging old bug tickets ... can you still reproduce this issue with the +latest version of QEMU (version 2.9)? + +[Expired for QEMU because there has been no activity for 60 days.] + |