aboutsummaryrefslogblamecommitdiffstats
path: root/bruiser/wasm/utils.py
blob: 69393b4ef372593db59193eb1536028b6ee98d96 (plain) (tree)
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
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
                     







































































































































































































































































































































































































































                                                                                                                                                                      
from opcodes import *
import numpy as np
import struct as stc

class ParseFlags:
    def __init__(self, wast_path, wasm_path, as_path, disa_path, out_path, dbg, unval, memdump
                 , idxspc, run, metric, gas, entry):
        self.wast_path = wast_path
        self.wasm_path = wasm_path
        self.as_path = as_path
        self.disa_path = disa_path
        self.out_path = out_path
        self.dbg = dbg
        self.unval = unval
        self.memdump = memdump
        self.idxspc = idxspc
        self.run = run
        self.metric = metric
        self.gas = gas
        self.entry = entry

# pretty print
class Colors:
    purple = '\033[95m'
    blue = '\033[94m'
    green = '\033[92m'
    yellow = '\033[93m'
    red = '\033[91m'
    grey = '\033[1;37m'
    darkgrey = '\033[1;30m'
    cyan = '\033[1;36m'
    ENDC = '\033[0m'
    BOLD = '\033[1m'
    UNDERLINE = '\033[4m'

def LEB128UnsignedDecode(bytelist):
    result = 0
    shift = 0
    for byte in bytelist:
        result |= (byte & 0x7f) << shift
        if (byte & 0x80) == 0:
            break
        shift += 7
    return(result)

def LEB128SignedDecode(bytelist):
    result = 0
    shift = 0
    for byte in bytelist:
        result |= (byte & 0x7f) << shift
        last_byte = byte
        shift += 7
        if (byte & 0x80) == 0:
            break

    if last_byte & 0x40:
        result |= - (1 << shift)

    return(result)

def LEB128UnsignedEncode(int_val):
    if int_val < 0:
        raise Exception("value must not be negative")
    elif int_val == 0:
        return bytes([0])

    byte_array = bytearray()
    while int_val:
        byte = int_val & 0x7f
        byte_array.append(byte | 0x80)
        int_val >>= 7

    byte_array[-1] ^= 0x80

    return(byte_array)


def LEB128SignedEncode(int_val):
    byte_array = bytearray()
    while True:
        byte = int_val & 0x7f
        byte_array.append(byte | 0x80)
        int_val >>= 7
        if (int_val == 0 and byte&0x40 == 0) or (int_val == -1 and byte&0x40):
            byte_array[-1] ^= 0x80
            break

    return(byte_array)

# @DEVI-FIXME-MVP-only-we currently inly support consts and get_global
# interprets the init-exprs
def init_interpret(expr):
    offset = 0
    byte, offset, dummy = Read(expr, offset, 'uint8')
    const = int()

    if byte == 65:
        # @DEVI-FIXME-the spec says varint32, obviously we are not doing that
        # since it will return neg values which are meningless and break things
        const, offset, dummy = Read(expr, offset, 'varuint32')
    elif byte == 66:
        const, offset, dummy = Read(expr, offset, 'varint64')
    elif byte == 67:
        const, offset, dummy = Read(expr, offset, 'uint32')
    elif byte == 68:
        const, offset, dummy = Read(expr, offset, 'uint64')
    elif byte == 35:
        pass
    else:
        raise Exception(Colors.red + "illegal opcode for an MVP init expr." + Colors.ENDC)

    block_end, offset, dummy = Read(expr, offset, 'uint8')
    if block_end != 11:
        raise Exception(Colors.red + "init expr has no block end." + Colors.ENDC)

    return(const)

# reads different-typed values from a byte array, takes in the bytearray, the
# current offset the read should be performed from and the kind of value that
# should be read. returns the read value as a decimal number, the updated
# offset and the number of bytes read
def Read(section_byte, offset, kind):
    operand = []
    return_list = int()
    read_bytes = 0

    if kind == 'varuint1' or kind == 'varuint7' or kind == 'varuint32' or kind == 'varuint64':
        while True:
            byte = int(section_byte[offset])
            read_bytes += 1
            offset += 1

            operand.append(byte)

            if byte == 0x80:
                pass
            elif byte & 0x80 != 0:
                pass
            else:
                # we have read the last byte of the operand
                break

        return_list = LEB128UnsignedDecode(operand)
        operand = []
    elif kind == 'uint8' or kind == 'uint16' or kind == 'uint32' or kind == 'uint64':
        byte = section_byte[offset: offset + TypeDic[kind]]
        read_bytes += TypeDic[kind]
        offset += TypeDic[kind]
        operand.append(byte)
        return_list = int.from_bytes(operand[0], byteorder='little', signed=False)
        operand = []
    elif kind == 'varint1' or kind == 'varint7' or kind == 'varint32' or kind == 'varint64':
        while True:
            byte = int(section_byte[offset])
            read_bytes += 1
            offset += 1
            operand.append(byte)
            # @DEVI-what happens when we decode a 56-bit value?
            if byte == 0x80 or byte == 0xff:
                pass
            elif byte & 0x80 != 0:
                pass
            else:
                # we have read the lasy byte of the operand
                break
        return_list = LEB128SignedDecode(operand)
        operand = []
    return return_list, offset, read_bytes

def ror(val, type_length, rot_size):
    rot_size_rem = rot_size % type_length
    return (((val >> rot_size_rem) & (2**type_length - 1)) | ((val & (2**rot_size_rem - 1)) << (type_length - rot_size_rem)))

def rol(val, type_length, rot_size):
    rot_size_rem = rot_size % type_length
    return (((val << rot_size_rem) & (2**type_length - 1)) | ((val & ((2**type_length - 1) - (2**(type_length - rot_size_rem) - 1))) >> (type_length - rot_size_rem)))

# @DEVI-these are here because i wanted to test them to make sure what i thik is
# happening is really happening
def reinterpretf32toi32(val):
    return (stc.unpack("i", stc.pack("f" ,val))[0])

def reinterpretf64toi64(val):
    return (stc.unpack("Q", stc.pack("d", val))[0])

def reinterpreti32tof32(val):
    return (stc.unpack("f", stc.pack("i", val))[0])

def reinterpreti64tof64(val):
    return (stc.unpack("d", stc.pack("Q", val))[0])

# @DEVI-FIXME
def clz(val, _type):
    cnt = int()
    if _type == 'uint32':
        bits = np.uint32(val)
        power = 31
        while power > -1:
            if val & 2**power == 0:
                cnt += 1
            else:
                break
            power -= 1
    elif _type == 'uint64':
        bits = bin(np.uint64(val))
        power = 63
        while power > -1:
            if val & 2**power == 0:
                cnt += 1
            else:
                break
            power -= 1
    else:
        raise Exception(Colors.red + "unsupported type passed to clz." + Colors.ENDC)
    return cnt


# @DEVI-FIXME
def ctz(val, _type):
    cnt = int()
    power = int()
    if _type == 'uint32':
        bits = np.uint32(val)
        while power < 32:
            if val & 2**power == 0:
                cnt += 1
            else:
                break
            power += 1
    elif _type == 'uint64':
        bits = bin(np.uint64(val))
        while power < 64:
            if val & 2**power == 0:
                cnt += 1
            else:
                break
            power += 1
    else:
        raise Exception(Colors.red + "unsupported type passed to ctz." + Colors.ENDC)
    return cnt

# @DEVI-FIXME
def pop_cnt(val, _type):
    cnt = int()
    power = int()
    if _type == 'uint32':
        bits = np.uint32(val)
        while power < 32:
            if val & 2**power != 0:
                cnt += 1
            power += 1
    elif _type == 'uint64':
        bits = bin(np.uint64(val))
        while power < 64:
            if val & 2**power != 0:
                cnt += 1
        power += 1
    else:
        raise Exception(Colors.red + "unsupported type passed to pop_cnt." + Colors.ENDC)
    return cnt

def gen_label(label_stack):
    counter += 1
    label_stack.append(counter)

def dumpprettysections(sections_list, width, section_name):
    line_counter = 0
    str_list = []
    module_counter = 0
    section_offset = 0
    for sections in sections_list:
        print (Colors.cyan + Colors.BOLD + "module " + repr(module_counter) + Colors.ENDC)
        for section in sections.section_list:
            if section_name == "": pass
            else:
                if section_name != SectionID[section[0]]:
                    continue
            print(Colors.green + Colors.BOLD + SectionID[section[0]] + " section" + Colors.ENDC)
            #print(Colors.green + "length: " + Colors.blue + section[1] + Colors.ENDC)
            print(Colors.green + "length: " + Colors.blue + repr(section[2]) + Colors.ENDC)
            print(Colors.green + "is custom section: " + Colors.blue + repr(section[3]) + Colors.ENDC)
            print(Colors.green + "name length: " + Colors.blue + repr(section[4]) + Colors.ENDC)
            print(Colors.green + "name: " + Colors.blue + section[5] + Colors.ENDC)
            print("\t", end="")
            for offset in range(0, width):
                if offset <= 15:
                    print(Colors.yellow + hex(offset) + "  " + Colors.ENDC, end="")
                else:
                    print(Colors.yellow + hex(offset) + " " + Colors.ENDC, end="")
            print()
            print(Colors.yellow + Colors.BOLD + hex(section_offset) + "\t" + Colors.ENDC, end="")
            for byte in section[6]:
                if line_counter == width:
                    section_offset += width
                    #print("\t\t", end="")
                    line_counter = 0
                    for char in str_list:
                        print(Colors.green + "|" + Colors.ENDC, end="")
                        if ord(char) < 32: print(" ", end="")
                        else:  print(char, end="")
                    str_list = []
                    print()
                    print(Colors.yellow + Colors.BOLD + hex(section_offset) + "\t" + Colors.ENDC, end="")
                print(format(byte, '02x') + "   ", end="")
                str_list.append(chr(byte))
                line_counter += 1
            #print("  ", end="")
            for i in range(0, width - line_counter): print("     ", end="")
            for char in str_list:
                if ord(char) < 32: print(" ", end="")
                else:  print(char, end="")
                print(Colors.green + "|" + Colors.ENDC, end="")
            str_list = []
            line_counter = 0
            section_offset = 0
            print()
        str_list = []
        line_counter = 0
        module_counter += 1
        section_offset = 0

def popcnt32(r1):
    temp = r1
    temp = (temp & 0x55555555) + ((temp >> 1) & 0x55555555)
    temp = (temp & 0x33333333) + ((temp >> 2) & 0x33333333)
    temp = (temp & 0x0f0f0f0f) + ((temp >> 4) & 0x0f0f0f0f)
    temp = (temp & 0x00ff00ff) + ((temp >> 8) & 0x00ff00ff)
    temp = (temp & 0x0000ffff) + ((temp >> 16) & 0x0000ffff)
    return temp

def popcnt64(r1):
    temp = r1
    temp = (temp & 0x5555555555555555) + ((temp >> 1) & 0x5555555555555555)
    temp = (temp & 0x3333333333333333) + ((temp >> 2) & 0x3333333333333333)
    temp = (temp & 0x0f0f0f0f0f0f0f0f) + ((temp >> 4) & 0x0f0f0f0f0f0f0f0f)
    temp = (temp & 0x00ff00ff00ff00ff) + ((temp >> 8) & 0x00ff00ff00ff00ff)
    temp = (temp & 0x0000ffff0000ffff) + ((temp >> 16) & 0x0000ffff0000ffff)
    temp = (temp & 0x00000000ffffffff) + ((temp >> 32) & 0x00000000ffffffff)
    return temp

def clz32(r1):
    if r1 == 0: return 32
    temp_r1 = r1
    n = 0
    if temp_r1 & 0xffff0000 == 0:
        n += 16
        temp_r1 = temp_r1 << 16
    if temp_r1 & 0xff000000 == 0:
        n += 8
        temp_r1 = temp_r1 << 8
    if temp_r1 & 0xf0000000 == 0:
        n += 4
        temp_r1 = temp_r1 << 4
    if temp_r1 & 0xc0000000 == 0:
        n += 2
        temp_r1 = temp_r1 << 2
    if temp_r1 & 0x8000000 == 0:
        n += 1
    return n

def clz64(r1):
    if r1 == 0: return 64
    temp_r1 = r1
    n = 0
    if temp_r1 & 0xffffffff00000000 == 0:
        n += 32
        temp_r1 = temp_r1 << 32
    if temp_r1 & 0xffff000000000000 == 0:
        n += 16
        temp_r1 == temp_r1 << 16
    if temp_r1 & 0xff00000000000000 == 0:
        n+= 8
        temp_r1 = temp_r1 << 8
    if temp_r1 & 0xf000000000000000 == 0:
        n += 4
        temp_r1 = temp_r1 << 4
    if temp_r1 & 0xc000000000000000 == 0:
        n += 2
        temp_r1 = temp_r1 << 2
    if temp_r1 & 0x8000000000000000 == 0:
        n += 1
    return n

def ctz32(r1):
    if r1 == 0: return 32
    temp_r1 = r1
    n = 0
    if temp_r1 & 0x0000ffff == 0:
        n += 16
        temp_r1 = temp_r1 >> 16
    if temp_r1 & 0x000000ff == 0:
        n += 8
        temp_r1 = temp_r1 >> 8
    if temp_r1 & 0x0000000f == 0:
        n += 4
        temp_r1 = temp_r1 >> 4
    if temp_r1 & 0x00000003 == 0:
        n += 2
        temp_r1 = temp_r1 >> 2
    if temp_r1 & 0x00000001 == 0:
        n += 1
    return n

def ctz64(r1):
    if r1 == 0: return 64
    temp_r1 = r1
    n = 0
    if temp_r1 & 0x00000000ffffffff == 0:
        n += 32
        temp_r1 = temp_r1 >> 32
    if temp_r1 & 0x000000000000ffff == 0:
        n += 16
        temp_r1 = temp_r1 >> 16
    if temp_r1 & 0x00000000000000ff == 0:
        n += 8
        temp_r1 = temp_r1 >> 8
    if temp_r1 & 0x000000000000000f == 0:
        n += 4
        temp_r1 = temp_r1 >> 4
    if temp_r1 & 0x0000000000000003 == 0:
        n += 2
        temp_r1 = temp_r1 >> 2
    if temp_r1 & 0x0000000000000001 == 0:
        n += 1
    return n