[Bug 1847467] Re: qemu-x86_64 segment prefixes error
This is an automated cleanup. This bug report has been moved to QEMU's new bug tracker on gitlab.com and thus gets marked as 'expired' now. Please continue with the discussion here: https://gitlab.com/qemu-project/qemu/-/issues/267 ** Changed in: qemu Status: Confirmed => Expired ** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #267 https://gitlab.com/qemu-project/qemu/-/issues/267 -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1847467 Title: qemu-x86_64 segment prefixes error Status in QEMU: Expired Bug description: qemu-x86_64 version 4.1.0 (qemu-x86_64 version 4.0.0 also have the issue) In 64-bit mode (x86_64) the DS, ES, SS or CS segment prefixes should be ignored; qemu-x86_64 does not ignore them. example: an x86_64 instructions preceded by FS DS (0x64 0x26) segment prefixes have the linear address of its memory reference flat-mapped (as if DS was in action) whereas it should be FS-mapped (offset by FS_base, because the DS, ES, SS or CS are just ignored). I attach a small C++ program that shows this discrepancy. $ ./sample I'm not in QEMU $ qemu-x86_64 ./sample I'm in QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1847467/+subscriptions
[Bug 1847467] Re: qemu-x86_64 segment prefixes error
Repro case in comment #1 still demonstrates bug. ** Changed in: qemu Status: Incomplete => Confirmed -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1847467 Title: qemu-x86_64 segment prefixes error Status in QEMU: Confirmed Bug description: qemu-x86_64 version 4.1.0 (qemu-x86_64 version 4.0.0 also have the issue) In 64-bit mode (x86_64) the DS, ES, SS or CS segment prefixes should be ignored; qemu-x86_64 does not ignore them. example: an x86_64 instructions preceded by FS DS (0x64 0x26) segment prefixes have the linear address of its memory reference flat-mapped (as if DS was in action) whereas it should be FS-mapped (offset by FS_base, because the DS, ES, SS or CS are just ignored). I attach a small C++ program that shows this discrepancy. $ ./sample I'm not in QEMU $ qemu-x86_64 ./sample I'm in QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1847467/+subscriptions
[Bug 1847467] Re: qemu-x86_64 segment prefixes error
The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now. If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Or please mark it as "Fix Released" if the problem has been solved with a newer version of QEMU already. Thank you and sorry for the inconvenience. ** Changed in: qemu Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1847467 Title: qemu-x86_64 segment prefixes error Status in QEMU: Incomplete Bug description: qemu-x86_64 version 4.1.0 (qemu-x86_64 version 4.0.0 also have the issue) In 64-bit mode (x86_64) the DS, ES, SS or CS segment prefixes should be ignored; qemu-x86_64 does not ignore them. example: an x86_64 instructions preceded by FS DS (0x64 0x26) segment prefixes have the linear address of its memory reference flat-mapped (as if DS was in action) whereas it should be FS-mapped (offset by FS_base, because the DS, ES, SS or CS are just ignored). I attach a small C++ program that shows this discrepancy. $ ./sample I'm not in QEMU $ qemu-x86_64 ./sample I'm in QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1847467/+subscriptions
