Key Error: 160 when loading ELF binary compiled with gcc 12.1

I am using cle for a bunch of ELF programs produced with gcc 12.1 and I keep hitting this exception: https://github.com/angr/cle/blob/2a2ffa93a151a6f6aacd0e9e839b5bd3dccbabbf/cle/backends/elf/elf.py#L753-L760

Traceback (most recent call last):
  File "/home/vanessa/Desktop/Code/cle/test.py", line 62, in <module>
    ld = cle.Loader(filename, load_debug_info=True, auto_load_libs=False)
  File "/home/vanessa/Desktop/Code/cle/cle/loader.py", line 133, in __init__
    self.initial_load_objects = self._internal_load(main_binary, *preload_libs, *force_load_libs, preloading=(main_binary, *preload_libs))
  File "/home/vanessa/Desktop/Code/cle/cle/loader.py", line 694, in _internal_load
    obj = self._load_object_isolated(main_spec)
  File "/home/vanessa/Desktop/Code/cle/cle/loader.py", line 876, in _load_object_isolated
    result = backend_cls(binary, binary_stream, is_main_bin=self.main_object is None, loader=self, **options)
  File "/home/vanessa/Desktop/Code/cle/cle/backends/elf/elf.py", line 195, in __init__
    self._load_dies(dwarf)
  File "/home/vanessa/Desktop/Code/cle/cle/backends/elf/elf.py", line 785, in _load_dies
    var = self._load_die_variable(sub_die, expr_parser, type_list)
  File "/home/vanessa/Desktop/Code/cle/cle/backends/elf/elf.py", line 826, in _load_die_variable
    parsed_exprs = expr_parser.parse_expr(die.attributes['DW_AT_location'].value)
  File "/home/vanessa/Desktop/Code/cle/env/lib/python3.9/site-packages/elftools/dwarf/dwarf_expr.py", line 151, in parse_expr
    arg_parser = self._dispatch_table[op]
KeyError: 160

I’m going to try / except and skip it for now, but wanted to bring it to y’all’s attention! I’m not familiar with this dispatch table thing, but I’m thinking maybe there is a new value that pyelftools hasn’t added yet?

[vsoch]

Yep seems to work! Thanks y’all, closing issue.

[rhelmot]

Some things to try: try installing pyelftools from git. There are some unreleased changes which I think are relevant. You can also try installing some pending pull requests on pyelftools, https://github.com/eliben/pyelftools/pull/418 in particular seems relevant?