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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
import py, struct
from rpython.jit.backend.x86.rx86 import *
globals().update(R.__dict__)
class CodeBuilderMixin(object):
def __init__(self):
self.buffer = []
super(CodeBuilderMixin, self).__init__()
def writechar(self, c):
assert isinstance(c, str) and len(c) == 1
self.buffer.append(c) # append a character
def getvalue(self):
return ''.join(self.buffer)
def force_frame_size(self, frame_size):
pass
def stack_frame_size_delta(self, delta):
pass
def assert_encodes_as(code_builder_cls, insn_name, args, expected_encoding):
s = code_builder_cls()
getattr(s, insn_name)(*args)
assert s.getvalue() == expected_encoding
class CodeBuilder32(CodeBuilderMixin, X86_32_CodeBuilder):
pass
def test_mov_ri():
s = CodeBuilder32()
s.MOV_ri(ecx, -2)
assert s.getvalue() == '\xB9\xFE\xFF\xFF\xFF'
def test_mov_rr():
s = CodeBuilder32()
s.MOV_rr(ebx, ebp)
assert s.getvalue() == '\x89\xEB'
def test_mov_br():
s = CodeBuilder32()
s.MOV_br(-36, edx)
assert s.getvalue() == '\x89\x55\xDC'
def test_mov_rb():
s = CodeBuilder32()
s.MOV_rb(edx, -36)
assert s.getvalue() == '\x8B\x55\xDC'
def test_mov_rm():
s = CodeBuilder32()
s.MOV_rm(edx, (edi, 0))
s.MOV_rm(edx, (edi, -128))
s.MOV_rm(edx, (edi, 128))
assert s.getvalue() == '\x8B\x17\x8B\x57\x80\x8B\x97\x80\x00\x00\x00'
def test_mov_mr():
s = CodeBuilder32()
s.MOV_mr((edi, 0), edx)
s.MOV_mr((edi, -128), edx)
s.MOV_mr((edi, 128), edx)
assert s.getvalue() == '\x89\x17\x89\x57\x80\x89\x97\x80\x00\x00\x00'
def test_mov_ra():
s = CodeBuilder32()
s.MOV_ra(edx, (esi, edi, 2, 0))
s.MOV_ra(edx, (esi, edi, 2, -128))
s.MOV_ra(edx, (esi, edi, 2, 128))
assert s.getvalue() == ('\x8B\x14\xBE' +
'\x8B\x54\xBE\x80' +
'\x8B\x94\xBE\x80\x00\x00\x00')
def test_mov_ra_no_base():
s = CodeBuilder32()
s.MOV_ra(edx, (NO_BASE_REGISTER, edi, 2, 0))
assert s.getvalue() == '\x8B\x14\xBD\x00\x00\x00\x00'
s = CodeBuilder32()
s.MOV_ra(edx, (NO_BASE_REGISTER, edi, 2, 0xCD))
assert s.getvalue() == '\x8B\x14\xBD\xCD\x00\x00\x00'
def test_mov_ar():
s = CodeBuilder32()
s.MOV_ar((esi, edi, 2, 0), edx)
s.MOV_ar((esi, edi, 2, -128), edx)
s.MOV_ar((esi, edi, 2, 128), edx)
assert s.getvalue() == ('\x89\x14\xBE' +
'\x89\x54\xBE\x80' +
'\x89\x94\xBE\x80\x00\x00\x00')
def test_nop_add_rr():
s = CodeBuilder32()
s.NOP()
s.ADD_rr(eax, eax)
assert s.getvalue() == '\x90\x01\xC0'
def test_lea_rb():
s = CodeBuilder32()
s.LEA_rb(ecx, -36)
assert s.getvalue() == '\x8D\x4D\xDC'
def test_lea32_rb():
s = CodeBuilder32()
s.LEA32_rb(ecx, -36)
assert s.getvalue() == '\x8D\x8D\xDC\xFF\xFF\xFF'
def test_call_l(s=None):
s = s or CodeBuilder32()
s.CALL_l(0x01234567) # relative offset
assert s.getvalue() == '\xE8' + struct.pack("<i", 0x01234567)
def test_jmp_l():
s = CodeBuilder32()
s.JMP_l(0x01234567) # relative offset
assert s.getvalue() == '\xE9' + struct.pack("<i", 0x01234567)
def test_j_il():
s = CodeBuilder32()
s.J_il(5, 0x01234567) # relative offset
assert s.getvalue() == '\x0F\x85' + struct.pack("<i", 0x01234567)
def test_set_ir():
s = CodeBuilder32()
s.SET_ir(5, dl)
assert s.getvalue() == '\x0F\x95\xC2'
def test_movsd_rj():
s = CodeBuilder32()
s.MOVSD_xj(xmm2, 0x01234567)
assert s.getvalue() == '\xF2\x0F\x10\x15\x67\x45\x23\x01'
def test_movzx8_rm():
s = CodeBuilder32()
s.MOVZX8_rm(ecx, (eax, 16))
assert s.getvalue() == '\x0F\xB6\x48\x10'
def test_movzx16_rm():
s = CodeBuilder32()
s.MOVZX16_rm(ecx, (eax, 16))
assert s.getvalue() == '\x0F\xB7\x48\x10'
def test_div():
s = CodeBuilder32()
s.DIV_r(ecx)
assert s.getvalue() == '\xF7\xF1'
def test_imul_rri():
s = CodeBuilder32()
# Multiply ecx by 0x01234567 and store the result in ebx
s.IMUL_rri(ebx, ecx, 0x01234567)
assert s.getvalue() == '\x69\xD9\x67\x45\x23\x01'
s = CodeBuilder32()
s.IMUL_rri(ebx, ecx, 0x2A)
assert s.getvalue() == '\x6B\xD9\x2A'
def test_shifts():
cb = CodeBuilder32
assert_encodes_as(cb, 'SHL_ri', (edx, 1), '\xD1\xE2')
assert_encodes_as(cb, 'SHL_ri', (edx, 5), '\xC1\xE2\x05')
assert_encodes_as(cb, 'SHL_rr', (edx, ecx), '\xD3\xE2')
assert_encodes_as(cb, 'SHR_ri', (edx, 1), '\xD1\xEA')
assert_encodes_as(cb, 'SHR_ri', (edx, 5), '\xC1\xEA\x05')
assert_encodes_as(cb, 'SHR_rr', (edx, ecx), '\xD3\xEA')
assert_encodes_as(cb, 'SAR_ri', (edx, 1), '\xD1\xFA')
assert_encodes_as(cb, 'SAR_ri', (edx, 5), '\xC1\xFA\x05')
assert_encodes_as(cb, 'SAR_rr', (edx, ecx), '\xD3\xFA')
def test_and8_rr():
assert_encodes_as(CodeBuilder32, 'AND8_rr', (bl, bh), '\x20\xFB')
def test_or8_rr():
assert_encodes_as(CodeBuilder32, 'OR8_rr', (bl, bh), '\x08\xFB')
def test_test8_mi():
assert_encodes_as(CodeBuilder32, 'TEST8_mi', ((edx, 16), 99),
'\xF6\x42\x10\x63')
def test_test8_ji():
assert_encodes_as(CodeBuilder32, 'TEST8_ji', (0x12345678, 99),
'\xF6\x05\x78\x56\x34\x12\x63')
def test_mov8():
cb = CodeBuilder32
assert_encodes_as(cb, 'MOV8_mi', ((edx, 16), 99), '\xC6\x42\x10\x63')
assert_encodes_as(cb, 'MOV8_ai', ((ebx, ecx, 2, 16), 99), '\xC6\x44\x8B\x10\x63')
def test_push32():
cb = CodeBuilder32
assert_encodes_as(cb, 'PUSH_i', (0x10009,), '\x68\x09\x00\x01\x00')
assert_encodes_as(cb, 'PUSH_i', (9,), '\x6A\x09')
def test_sub_ji8():
cb = CodeBuilder32
assert_encodes_as(cb, 'SUB_ji8', (11223344, 55),
'\x83\x2D\x30\x41\xAB\x00\x37')
assert_encodes_as(cb, 'SUB_mi8', ((edx, 16), 55),
'\x83\x6A\x10\x37')
class CodeBuilder64(CodeBuilderMixin, X86_64_CodeBuilder):
pass
def test_mov_ri_64():
s = CodeBuilder64()
s.MOV_ri(ecx, -2)
s.MOV_ri(r15, -3)
s.MOV_ri(ebx, -0x80000003)
s.MOV_ri(r13, -0x80000002)
s.MOV_ri(ecx, 42)
s.MOV_ri(r12, 0x80000042)
s.MOV_ri(r12, 0x100000007)
assert s.getvalue() == ('\x48\xC7\xC1\xFE\xFF\xFF\xFF' +
'\x49\xC7\xC7\xFD\xFF\xFF\xFF' +
'\x48\xBB\xFD\xFF\xFF\x7F\xFF\xFF\xFF\xFF' +
'\x49\xBD\xFE\xFF\xFF\x7F\xFF\xFF\xFF\xFF' +
'\xB9\x2A\x00\x00\x00' +
'\x41\xBC\x42\x00\x00\x80' +
'\x49\xBC\x07\x00\x00\x00\x01\x00\x00\x00')
def test_mov_rm_64():
s = CodeBuilder64()
s.MOV_rm(edx, (edi, 0))
s.MOV_rm(edx, (r12, 0))
s.MOV_rm(edx, (r13, 0))
assert s.getvalue() == '\x48\x8B\x17\x49\x8b\x14\x24\x49\x8b\x55\x00'
def test_mov_rm_negative_64():
s = CodeBuilder64()
s.MOV_rm(edx, (edi, -1))
assert s.getvalue() == '\x48\x8B\x57\xFF'
def test_movsd_xj_64():
s = CodeBuilder64()
s.MOVSD_xj(xmm2, 0x01234567)
assert s.getvalue() == '\xF2\x0F\x10\x14\x25\x67\x45\x23\x01'
def test_multibyte_nops():
for cls in [X86_64_CodeBuilder, X86_32_CodeBuilder]:
assert len(cls.MULTIBYTE_NOPs) == 16
for i in range(16):
assert len(cls.MULTIBYTE_NOPs[i]) == i
|
