1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
import sys
import os
import tempfile
from idaapi import GraphViewer
from miasm2.core.bin_stream_ida import bin_stream_ida
from miasm2.core.asmbloc import *
from miasm2.expression import expression as m2_expr
from miasm2.expression.simplifications import expr_simp
from miasm2.analysis.machine import Machine
from miasm2.analysis.depgraph import DependencyGraph
from utils import guess_machine
class depGraphSettingsForm(Form):
def __init__(self, ira):
self.ira = ira
self.address = ScreenEA()
cur_bloc = list(ira.getby_offset(self.address))[0]
for line_nb, l in enumerate(cur_bloc.lines):
if l.offset == self.address:
break
cur_label = str(cur_bloc.label)
labels = sorted(map(str, ira.blocs.keys()))
regs = sorted(ir_arch.arch.regs.all_regs_ids_byname.keys())
reg_default = regs[0]
for i in xrange(10):
opnd = GetOpnd(self.address, i).upper()
if opnd in regs:
reg_default = opnd
break
Form.__init__(self,
r"""BUTTON YES* Launch
BUTTON CANCEL NONE
Dependency Graph Settings
Track the element:
<Before the line:{rBeforeLine}>
<After the line:{rAfterLine}>
<At the end of the basic block:{rEndBlock}>{cMode}>
<Target basic block:{cbBBL}>
<Register to track:{cbReg}>
<Line number:{iLineNb}>
Method to use:
<Follow Memory:{rNoMem}>
<Follow Call:{rNoCall}>
<Implicit dependencies:{rImplicit}>{cMethod}>
<Highlight color:{cColor}>
""", {
'cbReg': Form.DropdownListControl(
items=regs,
readonly=False,
selval=reg_default),
'cMode': Form.RadGroupControl(("rBeforeLine", "rAfterLine",
"rEndBlock")),
'cMethod': Form.ChkGroupControl(("rNoMem", "rNoCall", "rImplicit")),
'iLineNb': Form.NumericInput(tp=Form.FT_RAWHEX,
value=line_nb),
'cbBBL': Form.DropdownListControl(
items=labels,
readonly=False,
selval=cur_label),
'cColor': Form.ColorInput(value=0xc0c020),
})
self.Compile()
@property
def label(self):
value = self.cbBBL.value
for real_label in self.ira.blocs:
if str(real_label) == value:
return real_label
raise ValueError("Bad label")
@property
def line_nb(self):
value = self.iLineNb.value
mode = self.cMode.value
if mode == 0:
return value
elif mode == 1:
return value + 1
else:
return len(self.ira.blocs[self.label].irs)
@property
def elements(self):
value = self.cbReg.value
return set([ir_arch.arch.regs.all_regs_ids_byname[value]])
@property
def depgraph(self):
value = self.cMethod.value
return DependencyGraph(self.ira,
implicit=value & 4,
follow_mem=value & 1,
follow_call=value & 2)
@property
def color(self):
return self.cColor.value
# Init
machine = guess_machine()
mn, dis_engine, ira = machine.mn, machine.dis_engine, machine.ira
bs = bin_stream_ida()
mdis = dis_engine(bs, dont_dis_nulstart_bloc=True)
ir_arch = ira(mdis.symbol_pool)
# Populate symbols with ida names
for ad, name in Names():
if name is None:
continue
mdis.symbol_pool.add_label(name, ad)
# Get the current function
addr = ScreenEA()
func = idaapi.get_func(addr)
blocs = mdis.dis_multibloc(func.startEA)
# Generate IR
for bloc in blocs:
ir_arch.add_bloc(bloc)
# Simplify affectations
for irb in ir_arch.blocs.values():
for irs in irb.irs:
for i, expr in enumerate(irs):
irs[i] = m2_expr.ExprAff(expr_simp(expr.dst), expr_simp(expr.src))
# Build the IRA Graph
ir_arch.gen_graph()
# Get settings
settings = depGraphSettingsForm(ir_arch)
settings.Execute()
# Get dependency graphs
dg = settings.depgraph
graphs = dg.get(settings.label, settings.elements, settings.line_nb,
set([ir_arch.symbol_pool.getby_offset(func.startEA)]))
# Display the result
comments = {}
sol_nb = 0
def clean_lines():
"Remove previous comments"
global comments
for offset in comments:
SetColor(offset, CIC_ITEM, 0xffffff)
MakeComm(offset, "")
comments = {}
def treat_element():
"Display an element"
global graphs, comments, sol_nb, settings
try:
graph = graphs.next()
except StopIteration:
comments = {}
print "Done: %d solutions" % (sol_nb)
return
sol_nb += 1
print "Get graph number %02d" % sol_nb
filename = os.path.join(tempfile.gettempdir(), "solution_0x%08x_%02d.dot" % (addr, sol_nb))
print "Dump the graph to %s" % filename
open(filename, "w").write(graph.graph.dot())
for node in graph.relevant_nodes:
try:
offset = ir_arch.blocs[node.label].lines[node.line_nb].offset
except IndexError:
print "Unable to highlight %s" % node
continue
comments[offset] = comments.get(offset, []) + [node.element]
SetColor(offset, CIC_ITEM, settings.color)
print "Possible value: %s" % graph.emul().values()[0]
for offset, elements in comments.iteritems():
MakeComm(offset, ", ".join(map(str, elements)))
def next_element():
"Display the next element"
clean_lines()
treat_element()
# Register and launch
idaapi.add_hotkey("Shift-N", next_element)
treat_element()
|