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mborgerson avatar mborgerson commented on May 24, 2024

pypcode doesn't understand executable formats and is choking on input it can't decode. You'll need to have a file with some raw executable code in it, or you can write a script to load an ELF and decode it with pypcode library.

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Muqi-Zou avatar Muqi-Zou commented on May 24, 2024

Aha, I see. Thanks a lot! Could I have one more question about printing?

Everytime I run the "block().vex.pp()" using pcode as IR in anger, I will have error as followed:

import angr
p = angr.Project('./Hash_Function_Shift_Folding_Linked_List_clang', engine=angr.engines.UberEnginePcode)
#p.factory.entry_state().block().vex.pp()
Traceback (most recent call last):
  File "angr_test.py", line 4, in <module>
    p.factory.entry_state().block().vex.pp()
  File "/home/muqi/decompile_tool/angr-dev/angr/angr/sim_state.py", line 598, in block
    return self.project.factory.block(*args, backup_state=self, **kwargs)
  File "/home/muqi/decompile_tool/angr-dev/angr/angr/factory.py", line 311, in block
    cross_insn_opt=cross_insn_opt,
  File "/home/muqi/decompile_tool/angr-dev/angr/angr/block.py", line 187, in __init__
    buffer, _, offset = self._vex_engine._load_bytes(addr - thumb, size, state=backup_state)
ValueError: not enough values to unpack (expected 3, got 2)

I used the latest version of angr and pypcode:

(angr_latest_offiical) muqi@muqi-desktop:~/decompile_tool/some_open_source_projects/test_C_programming/test_muqi/originalclang$ pip list
Package           Version
----------------- ------------
ailment           9.0.9166
angr              9.0.9166
archinfo          9.0.9166
bitstring         3.1.7
cachetools        4.2.2
capstone          4.0.2
cffi              1.14.6
claripy           9.0.9166
cle               9.0.9166
CppHeaderParser   2.7.4
decorator         4.4.2
dpkt              1.9.6
future            0.18.2
gitdb             4.0.7
GitPython         3.1.18
itanium-demangler 1.0
mulpyplexer       0.9
nampa             0.1.1
networkx          2.5.1
pefile            2021.5.24
pip               21.2.1
pkg_resources     0.0.0
plumbum           1.7.0
ply               3.11
progressbar2      3.53.1
protobuf          3.17.3
psutil            5.8.0
pycparser         2.20
pyelftools        0.27
pypcode           1.0.2
PySMT             0.9.1.dev137
python-utils      2.5.6
pyvex             9.0.9166
rpyc              5.0.1
setuptools        57.4.0
six               1.16.0
smmap             4.0.0
sortedcontainers  2.4.0
typing-extensions 3.10.0.0
unicorn           1.0.2rc4
wheel             0.36.2
z3-solver         4.8.12.0

and with same command, the old version(angr 9.0.4885 + pypcode 0.0.2) prints good for me.

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