mirror of
https://github.com/bitdefender/bddisasm.git
synced 2024-12-22 22:18:09 +00:00
220 lines
7.7 KiB
Python
220 lines
7.7 KiB
Python
#
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# Copyright (c) 2024 Bitdefender
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# SPDX-License-Identifier: Apache-2.0
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#
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import sys
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import re
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import json
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import string
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class UniqDict(dict):
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def __setitem__(self, key: str, value: str) -> type(None):
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if key in self.keys():
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raise ValueError("key is already present : %s" % (key))
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else:
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return super(UniqDict, self).__setitem__(key, value)
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class DecodeShemuParser(object):
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def __init__(self, obj: str):
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self._obj = obj
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self._crt = 0
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self._data = UniqDict()
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def rdline(self) -> str:
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"""
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Reads the line corresponding to the current index from the string containing the result.
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This function also increment the index to the current line.
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"""
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if self._crt == len(self._obj):
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return None
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out = self._obj[self._crt]
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self._crt += 1
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return out
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def rdnline(self) -> str:
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"""
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Reads the next line corresponding to the current index from the string containing the result.
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This function does not increment the index to the current line.
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"""
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if self._crt == len(self._obj):
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return None
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out = self._obj[self._crt]
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return out
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class ShemuResult(DecodeShemuParser):
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def __init__(self, obj: str):
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DecodeShemuParser.__init__(self, obj)
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self.process()
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def process(self) -> type(None):
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"""
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Parses the emulation result generated by disasmtool and stores it in a dictionary as key:value pair as follows:
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{
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"Emulation terminated with status": "0x0000000a",
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"flags:": "0x80",
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"NOPs": "0",
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"NULLs": "0",
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"total instructions": "2",
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"unique instructions": "1",
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"SHEMU_FLAG-0": "SHEMU_FLAG_HEAVENS_GATE"
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}
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"""
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self._obj = self._obj.split("\n")
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self._obj = list(filter(None, self._obj))
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# Emulation terminated with status 0x0000000a, flags: 0x10, 0 NOPs, 0 NULLs, 10 total instructions, 10 unique instructions
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line = self.rdline()
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tokens = line.split(",")
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tokens = list(filter(None, tokens))
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tokens = list(filter(lambda item: item.lstrip().rstrip(), tokens))
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for token in tokens:
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tsplit = token.lstrip().rstrip().split(" ")
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if (
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all(c in string.hexdigits + "x" for c in tsplit[-1])
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or tsplit[-1].isnumeric()
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):
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val = tsplit[-1]
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key = " ".join(tsplit[:-1])
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else:
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val = tsplit[0]
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key = " ".join(tsplit[1:])
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self._data[key] = val
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line = self.rdline()
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cnt = 0
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while line:
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self._data["SHEMU_FLAG-%s" % (cnt)] = line.lstrip().rstrip()
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cnt += 1
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line = self.rdline()
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class ShemuInstrux(DecodeShemuParser):
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def __init__(self, obj: str):
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DecodeShemuParser.__init__(self, obj)
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self.process()
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def process(self) -> type(None):
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"""
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Parses the emulation result generated by disasmtool and stores it in a dictionary as key:value pair as follows:
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{
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"AX": "0x0000000000000000",
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"CX": "0x0000000000000000",
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"DX": "0x0000000000000000",
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"BX": "0x0000000000000000",
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"BP": "0x0000000000000000",
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"SI": "0x0000000000000000",
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...
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"28": "0x0000000000000000",
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"29": "0x0000000000000000",
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"30": "0x0000000000000000",
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"31": "0x0000000000000000",
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"IP": "0x0000000000200000",
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"GS": "0x0000000000000202"
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}
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"""
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self._obj = self._obj.split("\n")
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line = self.rdline()
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while line:
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# X0 = 0x0000000000000000 X1 = 0x0000000000000000 X2 = 0x0000000000000000 X3 = 0x0000000000000000
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if " = " in line:
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tokens = re.findall(r"\w\w\s*=\s*0x\d{16}", line)
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for token in tokens:
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key = token.lstrip().rstrip().split("=")[0].lstrip().rstrip()
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val = token.lstrip().rstrip().split("=")[1].lstrip().rstrip()
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self._data[key] = val
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line = self.rdline()
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class DecodeInstrux(DecodeShemuParser):
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def __init__(self, obj: str):
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DecodeShemuParser.__init__(self, obj)
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self.process()
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def process(self) -> type(None):
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"""
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Parses an instruction generated by disasmtool and stores it in a dictionary as key:value pair as follows:
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{
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"InstructionBytes": "c4e2784900",
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"InstructionText": "LDTILECFG zmmword ptr [rax]",
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"RIP": "0000000000000000",
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"DSIZE": "32",
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"ASIZE": "64",
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"VLEN": "-",
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"ISA Set": "AMX-TILE",
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...
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"Operand-0": {
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"Operand": "0",
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"Acc": "R-",
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"Type": "Memory",
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"Size": "64",
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"RawSize": "64",
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"Encoding": "M",
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"Segment": "3",
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"Base": "0"
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}
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}
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"""
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self._obj = self._obj.split("\n")
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line = self.rdline()
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while line:
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# 0000000000000000 c4e2784900 LDTILECFG zmmword ptr [rax]
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# 0000000000000000 62 db 0x62 (0x80000002)
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if re.search("^[0-9A-F]{16}", line):
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tokens = line.split(" ")
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tokens = list(filter(None, tokens))
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tokens = list(filter(lambda item: item.lstrip().rstrip(), tokens))
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self._data["InstructionBytes"] = tokens[1].lstrip().rstrip()
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self._data["InstructionText"] = " ".join(tokens[2:]).lstrip().rstrip()
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self._data["RIP"] = tokens[0].lstrip().rstrip()
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# Operand: 0, Acc: RW, Type: Register, Size: 1, RawSize: 1, Encoding: M, RegType: General Purpose,
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# RegSize: 1, RegId: 22, RegCount: 1
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if "Operand:" in line:
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while self.rdnline() and "Operand:" not in self.rdnline():
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# if line.endswith(", ") or line.endswith(","):
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line += self.rdline()
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local = UniqDict()
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tokens = line.split(",")
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tokens = list(filter(lambda item: item.lstrip().rstrip(), tokens))
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dc = 0
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for token in tokens:
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if key == "Decorator":
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key = "%s-%s" % (key, dc)
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dc += 1
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key = token.lstrip().rstrip().split(":")[0].lstrip().rstrip()
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val = token.lstrip().rstrip().split(":")[1].lstrip().rstrip()
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local[key] = val
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key = tokens[0].lstrip().rstrip().split(":")[0].lstrip().rstrip()
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val = tokens[0].lstrip().rstrip().split(":")[1].lstrip().rstrip()
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self._data["%s-%s" % (key, val)] = local
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# EVEX Tuple Type: Tuple 1 scalar, 8 bit
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# EVEX Tuple Type: Full
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elif "EVEX" in line:
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tokens = line.split(":")
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key = tokens[0].lstrip().rstrip()
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val = tokens[1].lstrip().rstrip()
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self._data[key] = val
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elif ": " in line:
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tokens = line.split(",")
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tokens = list(filter(lambda item: item.lstrip().rstrip(), tokens))
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for token in tokens:
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key = token.lstrip().rstrip().split(":")[0].lstrip().rstrip()
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val = token.lstrip().rstrip().split(":")[1].lstrip().rstrip()
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self._data[key] = val
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line = self.rdline()
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