fnop instruction not lifted
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danmaam commented
Description
Lifting a fnop instruction with x86 architecture results in an IRSB with no instructions and jumpkind Ijk_NoDecode
Steps to reproduce the bug
IPython session:
In [1]: import pyvex
In [2]: import archinfo
In [3]: bytecode = b'\xd9\xd0'
In [4]: pyvex.lift(bytecode, 0x0, archinfo.arch_from_id('x86'))
Out[4]: IRSB <0x0 bytes, 0 ins., <Arch X86 (LE)>> at 0x0
In [5]: import capstone
In [6]: md = capstone.Cs(capstone.CS_ARCH_X86, capstone.CS_MODE_32)
In [7]: for i in md.disasm(bytecode, 0x0):
...: print("0x%x:\t%s\t%s\n" % (i.address, i.mnemonic, i.op_str))
...:
0x0: fnop
Environment
pyvex version 9.2.33 from pypi
Additional context
No response