- Commit
- d49c8052a6f471d0a56dd0b07957dfb805c10fd2
- Parent
- 6b7c20c87753799db265b8e0d03663ca550cf5e6
- Author
- Pablo Emilio Escobar Gaviria <pablo-escobar@riseup.net>
- Date
Refactored the script that extracts the relevant machine code of the example function
introducao-a-assembly
Repositório dos arquivos usados na apresentação "Introdução a Assembly" da CriptoGoma de 2020 🖥️
Diffstat
1 file changed, 6 insertions, 6 deletions
| Status | File Name | N° Changes | Insertions | Deletions |
| Modified | examples/reverse_engeneering/convert.py | 12 | 6 | 6 |
diff --git a/examples/reverse_engeneering/convert.py b/examples/reverse_engeneering/convert.py @@ -1,11 +1,11 @@ #!python3 START = 0x5fa # Start of the factorial function according to gdb -END = 0x625 # End of the factorial function according to gdb +END = 0x625 # End of the factorial function according to gdb -with open("exemplo.bin", "rb") as binary: - byts = binary.read()[START:END] - bin_str = lambda b: bin(b)[2:].rjust(8, "0") +with open("exemplo.bin", "rb"), as machine_code: + bs = machine_code.read()[START:END] + + with open("bin.txt", "w", encoding="utf8") as output: + output.write(" ".join([f"{byte:b}".zfill(8) for byte in bs])) - with open("bin.txt", "w", encoding="utf8") as bin_file: - bin_file.write(" ".join([s for s in map(bin_str, byts)]))