Re: [Valgrind-developers] valgrind: Unrecognised instruction error

[John R. <jr...@bi...>]

>> ==2214549== valgrind: Unrecognised instruction at address 0x46bc3d9.
>> ==2214549==    at 0x46BC3D9: __wine_syscall_dispatcher (in /usr/local/lib/wine/x86_64-unix/ntdll.so)

> A bug has been entered as  https://bugs.kde.org/show_bug.cgi?id=461855
> "(wine xsavec64) vex amd64->IR: unhandled instruction bytes: 0x48 0xF 0xC7 0xA1 0xC0 0x0 0x0 0x0 0x48 0xF"

Probably the bug should be closed as Invalid; see Comment
    https://bugs.kde.org/show_bug.cgi?id=461855#c2

The Original Poster is using an ancient version (6 years old)
of valgrind that does not print the unrecognized instruction bytes.

The program being analyzed is really wine64, not a.out.so,
and debug symbols for wine64 are not available.

Wine64 requires an "installation" of Microsoft Windows.

Altogether a very disappointing episode.