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
|
# Copyright (c) 2015-2016 Vector 35 LLC
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
import traceback
import ctypes
# Binary Ninja components
import _binaryninjacore as core
import architecture
import log
class CallingConvention(object):
name = None
caller_saved_regs = []
int_arg_regs = []
float_arg_regs = []
arg_regs_share_index = False
stack_reserved_for_arg_regs = False
int_return_reg = None
high_int_return_reg = None
float_return_reg = None
_registered_calling_conventions = []
def __init__(self, arch, handle = None):
if handle is None:
self.arch = arch
self._pending_reg_lists = {}
self._cb = core.BNCustomCallingConvention()
self._cb.context = 0
self._cb.getCallerSavedRegisters = self._cb.getCallerSavedRegisters.__class__(self._get_caller_saved_regs)
self._cb.getIntegerArgumentRegisters = self._cb.getIntegerArgumentRegisters.__class__(self._get_int_arg_regs)
self._cb.getFloatArgumentRegisters = self._cb.getFloatArgumentRegisters.__class__(self._get_float_arg_regs)
self._cb.freeRegisterList = self._cb.freeRegisterList.__class__(self._free_register_list)
self._cb.areArgumentRegistersSharedIndex = self._cb.areArgumentRegistersSharedIndex.__class__(self._arg_regs_share_index)
self._cb.isStackReservedForArgumentRegisters = self._cb.isStackReservedForArgumentRegisters.__class__(self._stack_reserved_for_arg_regs)
self._cb.getIntegerReturnValueRegister = self._cb.getIntegerReturnValueRegister.__class__(self._get_int_return_reg)
self._cb.getHighIntegerReturnValueRegister = self._cb.getHighIntegerReturnValueRegister.__class__(self._get_high_int_return_reg)
self._cb.getFloatReturnValueRegister = self._cb.getFloatReturnValueRegister.__class__(self._get_float_return_reg)
self.handle = core.BNCreateCallingConvention(arch.handle, self.__class__.name, self._cb)
self.__class__._registered_calling_conventions.append(self)
else:
self.handle = handle
self.arch = architecture.Architecture(core.BNGetCallingConventionArchitecture(self.handle))
self.__dict__["name"] = core.BNGetCallingConventionName(self.handle)
self.__dict__["arg_regs_share_index"] = core.BNAreArgumentRegistersSharedIndex(self.handle)
self.__dict__["stack_reserved_for_arg_regs"] = core.BNIsStackReservedForArgumentRegisters(self.handle)
count = ctypes.c_ulonglong()
regs = core.BNGetCallerSavedRegisters(self.handle, count)
result = []
arch = self.arch
for i in xrange(0, count.value):
result.append(arch.get_reg_name(regs[i]))
core.BNFreeRegisterList(regs, count.value)
self.__dict__["caller_saved_regs"] = result
count = ctypes.c_ulonglong()
regs = core.BNGetIntegerArgumentRegisters(self.handle, count)
result = []
arch = self.arch
for i in xrange(0, count.value):
result.append(arch.get_reg_name(regs[i]))
core.BNFreeRegisterList(regs, count.value)
self.__dict__["int_arg_regs"] = result
count = ctypes.c_ulonglong()
regs = core.BNGetFloatArgumentRegisters(self.handle, count)
result = []
arch = self.arch
for i in xrange(0, count.value):
result.append(arch.get_reg_name(regs[i]))
core.BNFreeRegisterList(regs, count.value)
self.__dict__["float_arg_regs"] = result
reg = core.BNGetIntegerReturnValueRegister(self.handle)
if reg == 0xffffffff:
self.__dict__["int_return_reg"] = None
else:
self.__dict__["int_return_reg"] = self.arch.get_reg_name(reg)
reg = core.BNGetHighIntegerReturnValueRegister(self.handle)
if reg == 0xffffffff:
self.__dict__["high_int_return_reg"] = None
else:
self.__dict__["high_int_return_reg"] = self.arch.get_reg_name(reg)
reg = core.BNGetFloatReturnValueRegister(self.handle)
if reg == 0xffffffff:
self.__dict__["float_return_reg"] = None
else:
self.__dict__["float_return_reg"] = self.arch.get_reg_name(reg)
def __del__(self):
core.BNFreeCallingConvention(self.handle)
def _get_caller_saved_regs(self, ctxt, count):
try:
regs = self.__class__.caller_saved_regs
count[0] = len(regs)
reg_buf = (ctypes.c_uint * len(regs))()
for i in xrange(0, len(regs)):
reg_buf[i] = self.arch.regs[regs[i]].index
result = ctypes.cast(reg_buf, ctypes.c_void_p)
self._pending_reg_lists[result.value] = (result, reg_buf)
return result.value
except:
log.log_error(traceback.format_exc())
count[0] = 0
return None
def _get_int_arg_regs(self, ctxt, count):
try:
regs = self.__class__.int_arg_regs
count[0] = len(regs)
reg_buf = (ctypes.c_uint * len(regs))()
for i in xrange(0, len(regs)):
reg_buf[i] = self.arch.regs[regs[i]].index
result = ctypes.cast(reg_buf, ctypes.c_void_p)
self._pending_reg_lists[result.value] = (result, reg_buf)
return result.value
except:
log.log_error(traceback.format_exc())
count[0] = 0
return None
def _get_float_arg_regs(self, ctxt, count):
try:
regs = self.__class__.float_arg_regs
count[0] = len(regs)
reg_buf = (ctypes.c_uint * len(regs))()
for i in xrange(0, len(regs)):
reg_buf[i] = self.arch.regs[regs[i]].index
result = ctypes.cast(reg_buf, ctypes.c_void_p)
self._pending_reg_lists[result.value] = (result, reg_buf)
return result.value
except:
log.log_error(traceback.format_exc())
count[0] = 0
return None
def _free_register_list(self, ctxt, regs):
try:
buf = ctypes.cast(regs, ctypes.c_void_p)
if buf.value not in self._pending_reg_lists:
raise ValueError("freeing register list that wasn't allocated")
del self._pending_reg_lists[buf.value]
except:
log.log_error(traceback.format_exc())
def _arg_regs_share_index(self, ctxt):
try:
return self.__class__.arg_regs_share_index
except:
log.log_error(traceback.format_exc())
return False
def _stack_reserved_for_arg_regs(self, ctxt):
try:
return self.__class__.stack_reserved_for_arg_regs
except:
log.log_error(traceback.format_exc())
return False
def _get_int_return_reg(self, ctxt):
try:
return self.arch.regs[self.__class__.int_return_reg].index
except:
log.log_error(traceback.format_exc())
return False
def _get_high_int_return_reg(self, ctxt):
try:
if self.__class__.high_int_return_reg is None:
return 0xffffffff
return self.arch.regs[self.__class__.high_int_return_reg].index
except:
log.log_error(traceback.format_exc())
return False
def _get_float_return_reg(self, ctxt):
try:
if self.__class__.float_return_reg is None:
return 0xffffffff
return self.arch.regs[self.__class__.float_int_return_reg].index
except:
log.log_error(traceback.format_exc())
return False
def __repr__(self):
return "<calling convention: %s %s>" % (self.arch.name, self.name)
def __str__(self):
return self.name
|
