Re: [Qemu-devel] x86 amd64 singlestepping bug through syscall instruction

2015-10-20 Thread Rudolf Marek
Hi all, It seems this problem was not picked by anyone from QEMU community. Is there other way to report this bug? Thanks Rudolf -- S přátelským pozdravem / Best regards / Mit freundlichen Grüßen Ing. Rudolf Marek SYSGO s.r.o. Zelený pruh 99 CZ-14800 Praha 4 Phone: +420 222138 111, +49 6136

[Qemu-devel] x86 amd64 singlestepping bug through syscall instruction

2015-10-08 Thread Rudolf Marek
Hi all, I was told on IRC to use this ML to report the following bug. It seems that there is something wrong with QEMU with respect to handle the singlestepping and AMD64 syscall instruction. The AMD "syscall" instruction will clear defined flag in the FMASK MSR. Normally the TF flag is set

[Qemu-devel] x86 amd64 singlestepping bug through syscall instruction

2015-10-08 Thread Rudolf Marek
Hi all, I was told on IRC to use this ML to report the following bug. It seems that there is something wrong with QEMU with respect to handle the singlestepping and AMD64 syscall instruction. The AMD "syscall" instruction will clear defined flag in the FMASK MSR. Normally the TF flag is set