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jblitzar
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github-python-corpus

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import os
try:
from .utils import *
except:
from utils import *
from user_il import create_user_func
import json
"""
找到 中间计算过程中所有 相关用到的变量
"""
def find_all_relative_var(jump_var: SSAVariable ,info):
def_il = jump_var.def_site
for var in def_il.vars_read:
if info.get("var_read") is None:
info["var_read"] = [var]
else:
info["var_read"].append(var)
find_all_relative_var(var,info)
def get_jump_target(bv: BinaryView,jump_var,info):
if not isinstance(jump_var, binaryninja.mediumlevelil.SSAVariable):
print("jump_var must be an SSAVariable")
raise Exception("输入参数不是变量 mlil ssa 变量")
def_il = jump_var.def_site
var2value = {
"true": {
},
'false': {
}
}
for var in def_il.vars_read:
var_text = f"{var.name}#{var.version}"
# binaryninja.mediumlevelil.MediumLevelILVarPhi
var_type = def_il.get_ssa_var_possible_values(var).type
if var_type == RegisterValueType.UndeterminedValue:
# var_value = get_jump_target(bv,var,info)
# if var_value is None:
raise Exception("忘记了")
# var2value[var_text] = var_value
# info[var_text] = var_value
elif var_type == RegisterValueType.InSetOfValues or RegisterValueType.ConstantValue:
# 如果变量的定义里面 没有继续读取变量 这种才是真的常量
if len(var.def_site.vars_read) == 0:
if var == info["true_branch_var"]:
var2value['true'][var_text] = def_il.get_ssa_var_possible_values(var).value
elif var == info["false_branch_var"]:
var2value['false'][var_text] = def_il.get_ssa_var_possible_values(var).value
else:
raise f"error {var}"
else:
var_value = get_jump_target(bv,var,info)
var2value = var_value
info[var_text] = var_value
else:
raise Exception("Unexpected variable type")
if def_il.instr.operation == MediumLevelILOperation.MLIL_VAR_PHI:
# ['x11#3', ' = ', 'ϕ', '(', 'x11#1', ', ', 'x11#2', ')']
# Phi 节点返回所有的值
true_branch_var = info["true_branch_var"]
true_var_text = f"{true_branch_var.name}#{true_branch_var.version}"
false_branch_var = info["false_branch_var"]
false_var_text = f"{false_branch_var.name}#{false_branch_var.version}"
_ret = {
"true": {
def_il.tokens[0].text: var2value['true'][true_var_text]
},
"false": {
def_il.tokens[0].text: var2value['false'][false_var_text]
},
}
return _ret
elif def_il.instr.operation == MediumLevelILOperation.MLIL_SET_VAR_SSA:
tmp_tokens = [i.text for i in def_il.tokens]
tmp_tokens = ''.join(tmp_tokens)
true_expr_list = []
false_expr_list = []
raw_expr = ""
if isinstance(def_il.src,binaryninja.mediumlevelil.MediumLevelILLoadSsa):
# ['x13#1', ' = ', '[', '0x1ddc80', ' + ', 'x11#3', ']', '.q', ' @ ', 'mem#0']
search_ret = re.search("=(.*?)@",tmp_tokens)
if search_ret is None:
print(f" {tmp_tokens} not found in {def_il} ")
raise Exception(f" {tmp_tokens} not found in {def_il} ")
raw_expr = search_ret.group(1)
else:
raw_expr = tmp_tokens[tmp_tokens.find("=")+1:]
# if info.get("expr") is None:
# info["expr"] = [raw_expr]
# else:
# info["expr"].append(raw_expr)
_ret = {
"true": {
},
"false": {