[Valgrind-users] amd64->IR: unhandled instruction bytes: 0xC5 0xF9 0x57 0xC0 0xC6 0x83 0xDC 0xD

[Christian P. <tr...@ge...>]

Hey all,

while trying to debug a LLVM-based application, I get the following output.

vex amd64->IR: unhandled instruction bytes: 0xC5 0xF9 0x57 0xC0 0xC6
0x83 0xDC 0xD
==17842== valgrind: Unrecognised instruction at address 0x5630b64.
==17842==    at 0x5630B64:
llvm::X86TargetLowering::X86TargetLowering(llvm::X86TargetMachine&)
(in /home/trapni/projects/x0/lib/libXze
roFlow.so)
==17842==    by 0x55BDEDD:
llvm::X86_64TargetMachine::X86_64TargetMachine(llvm::Target const&,
llvm::StringRef, llvm::StringRef, llvm:
:StringRef, llvm::Reloc::Model, llvm::CodeModel::Model) (in
/home/trapni/projects/x0/lib/libXzeroFlow.so)
==17842==    by 0x55BF318:
llvm::RegisterTargetMachine<llvm::X86_64TargetMachine>::Allocator(llvm::Target
const&, llvm::StringRef, llv
m::StringRef, llvm::StringRef, llvm::Reloc::Model,
llvm::CodeModel::Model) (in
/home/trapni/projects/x0/lib/libXzeroFlow.so)
==17842==    by 0x5824202:
llvm::EngineBuilder::selectTarget(llvm::Module*, llvm::StringRef,
llvm::StringRef, llvm::SmallVectorImpl<st
d::string> const&, llvm::Reloc::Model, llvm::CodeModel::Model,
std::string*) (in /home/trapni/projects/x0/lib/libXzeroFlow.so)
==17842==    by 0x581977C: llvm::EngineBuilder::create() (in
/home/trapni/projects/x0/lib/libXzeroFlow.so)

this looks like an unsupported CPU instruction to me - is it?

While not knowing how I can work around this, I'd be really happy if
there is any chance in getting this working in some time :)

Best regards,
Christian.