diff options
Diffstat (limited to 'results/classifier/105/instruction/1078892')
| -rw-r--r-- | results/classifier/105/instruction/1078892 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/results/classifier/105/instruction/1078892 b/results/classifier/105/instruction/1078892 new file mode 100644 index 000000000..b971721cc --- /dev/null +++ b/results/classifier/105/instruction/1078892 @@ -0,0 +1,24 @@ +instruction: 0.861 +device: 0.781 +boot: 0.714 +graphic: 0.701 +vnc: 0.544 +semantic: 0.510 +other: 0.462 +mistranslation: 0.376 +network: 0.376 +socket: 0.350 +KVM: 0.114 +assembly: 0.107 + +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.] + |