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** Changed in: qemu
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/661696
Title:
incomplete emulation of fstenv under TCG
Status in QEMU:
Incomplete
Bug description:
Steps to reproduce:
1) Install Windows (tried XP and 7) in qemu (tried qemu without kvm
and qemu-kvm).
2) Get OllyDbg ( http://ollydbg.de/odbg200.zip ).
3) Use some Metasploit-encoded file, example included.
It is not a virus!
File was generated with Metasploit, command (if i remember it right):
`msfpayload windows/exec cmd=notepad R | msfencode -e
x86/shikata_ga_nai -t exe -o cmd_exec_notepad.shikata_ga_nai.exe`.
4) Launch the file under Windows in qemu, make sure it opens a
notepad.
5) Open file under OllyDbg, run (F9) it there. It opens a notpad.
Close OllyDbg.
6) Open file under OllyDbg, trace over (Ctrl+F12) it there. It fails with
`Access violation when writing to [some address]`.
Command: 316A 13, XOR DWORD PTR DS:[EDX+13],EBP
Under native Windows, the trace over command works fine.
Under VMware the trace works fine.
Under VirtualBox it also fails (checked in the spring).
$ qemu-kvm --version
QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008
Fabrice Bellard
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